IL -1a lphas igna l ing isc r i t i ca lfo r leu ko c y te re c ru i tmen ta f te rpu lmona r yA spe rg i l lu s fum iga tu scha l lenge Au tho rs :A laynaK .Ca f f rey , Ma rga re tM .Lehmann , Ju l ianne M .Z ickov ich ,VanessaEsp inosa ,Ke l ly M . Shepa rdson ,Ch r is tophe rP .Wa tschke ,K imbe r ly M . H i lme r ,A rsaThammahong ,B r idge tM .Ba rke r , Ama r i l izR ive ra ,Robe r tA .C rame r ,&JoshuaJ . Oba r Th i si sthef ina lve r s iono fre co rdo fana r t i c letha to r ig ina l l y appea r edinPLOSPa thogen sin Janua r y2015 . Ca f f re y ,A la ynaK . , Ma rga re tM .Lehmann ,Ju l ianne M .Z i c ko v i ch , Vane s saE sp ino sa ,Ke l l y M .Shepa rd son ,Ch r i s tophe rP . Wa t s ch ke ,K imbe r l yM .H i lme r ,e ta l .“ IL -1αS igna l ingI s C r i t i ca lfo rLeu ko c y teRe c ru i tmen ta f te rPu lmona r yA spe rg i l lu sFum iga tu sCha l lenge . ” Ed i tedb yB ru ceSK le in .PLoSPa thog11 ,no .1( Janua r y28 ,2015 ) :e1004625 . h t tp : / /d x .do i .o rg /10 .1371 / jou rna l .ppa t .1004625 Madeava i lab leth roughMon tanaS ta teUn i ve rs i t y ’ sS cho la rWo r ks s cho la rw o rks .mon tana .edu RESEARCHART ICLE I L -1 αS igna l ingI sC r i t i ca lfo rL eu ko c y t e R e c ru i tm en ta f t e rPu lmona r yA sp e rg i l lu s fum iga tu sCha l l eng e 1 1 2 A laynaK .Ca f f rey1, Ma rga re tM .Lehmann ,Ju l ianne M .Z ickov ich ,VanessaEsp inosa , 3 1 1 Ke l ly M .Shepa rdson ,Ch r is tophe rP . Wa tschke,K imbe r ly M .H i lme r, 4 2 3 A rsaThammahong3,B r idge tM .Ba rke r ,Ama r i l izR ive ra ,Robe r tA .C rame r 1 JoshuaJ .Oba r* 1Mon tanaS ta teUn i ve r s i t y ,Depa r tmen to f Immuno log y& In fe c t iou sD i sea se s ,Bo zeman , Mon tana ,Un i ted S ta te so fAme r i ca ,2Ru tge r s ,NewJe r se y Med i ca lS choo l ,Depa r tmen to fPed ia t r i c s ,Cen te r fo r Immun i ty and In f lamma t ion ,Newa r k ,NewJe r se y ,Un i tedS ta te so fAme r i ca ,3Ge i se lS choo lo f Med i c inea t Da r tmou th ,Depa r tmen to fM i c rob io log y& Immuno log y ,Hano ve r ,NewHamp sh i re ,Un i tedS ta teso fAme r ica , 4TGenNo r th ,Pa thogenGenom i c sRe sea r chD i v i s ion ,F lag s ta f f ,A r i zona ,Un i tedS ta te so fAme r ica *jo shua .oba r@mon tana .edu OPENACCESS C i t a t ion :C a f f r e yAK ,L e hm a n nMM ,Z i c k o v i c hJM , E s p i n o s aV ,S h e p a r d s o nKM ,W a t s c h k eCP ,e ta l . ( 2 0 1 5 ) I L 1 αS i g n a l i n g I sC r i t i c a l f o rL e u k o c y t e R e c r u i tm e n ta f t e rP u lm o n a r yA s p e r g i l l u s f um i g a t u s C h a l l e n g e .P L oSP a t h o g1 1 ( 1 ) :e 1 0 0 4 6 2 5 . d o i : 1 0 . 1 3 7 1 / j o u r n a l . p p a t . 1 0 0 4 6 2 5 Ab s t ra c t A spe rg i l lu sfum iga tu sisa mo ld tha tcausesseve repu lmona ry in fec t ions .Ou rknow ledgeo f howA .fum iga tu sg row th iscon t ro l led in theresp i ra to ryt rac t isdeve lop ing ,bu ts t i l l l im i ted . A lveo la r mac rophages , lungres iden t mac rophages ,anda i rwayep i the l ia lce l lscons t i tu te the f i rs t l ineso fde fenseaga ins t inha led A .fum iga tu scon id ia .Subsequen t ly ,neu t roph i ls Ed i t o r :B r u c eSK l e i n ,U n i v e r s i t yo fW i s c o n s i n and in f lamma to ryCCR2+ monocy tesa rerec ru i ted to theresp i ra to ryt rac t top reven t funga l M a d i s o n ,UN ITEDST A TES g row th .Howeve r , the mechan ismo fneu t roph i land mac rophagerec ru i tmen t to theresp i ra R e c e i v ed :J u n e6 ,2 0 1 4 to ry t rac ta f te r A .fum iga tu sexposu rerema insana reao fongo ing inves t iga t ion .He rewe s h o w t h a t A . f um i g a t u sp u lm o n a r y c h a l l e n g e i n d u c e s e x p r e s s i o n o f t h e i n f l amm a s om e A c c ep t ed :D e c em b e r1 1 ,2 0 1 4 dependen tcy tok ines IL -1βand IL -18w i th in the f i rs t12hou rs ,wh i le IL -1αexp ress ion Pub l i sh ed :J a n u a r y2 8 ,2 0 1 5 con t inua l ly inc reasesove ra t leas t the f i rs t48hou rs .S t r ik ing ly ,I l1 r1 -de f ic ien tm icea reh igh Cop y r igh t :©2 0 1 5C a f f r e ye ta l .T h i s i sa no p e n lysuscep t ib le topu lmona ry A .fum iga tu scha l lengeexemp l i f iedbyrobus t funga lp ro l i fe ra a c c e s sa r t i c l ed i s t r i b u t e du n d e r t h e t e rm so f t h e t i o n i n t h e l u n g p a r e n c h ym a . E n h a n c e d s u s c e p t i b i l i t y o f I l 1 r 1 d e f i c i e n t m i c e c o r r e l a t e d w i t h C r e a t i v eC omm o n sA t t r i b u t i o nL i c e n s e,w h i c hp e rm i t s u n r e s t r i c t e du s e ,d i s t r i b u t i o n ,a n d r e p r o d u c t i o n i na n y d the r than IL -1 β e fec ts in leukocy terec ru i tmen tandan t i funga lac t iv i ty . Impo r tan t ly , IL -1αra m e d i um ,p r o v i d e d t h eo r i g i n a la u t h o ra n ds o u r c ea r e wasc ruc ia l fo rop t ima l leukocy terec ru i tmen t . IL -1αs igna l ingenhanced thep roduc t iono f c r e d i t e d . CXCL1 . Mo reove r ,CCR2+ monocy tesa rerequ i red fo rop t ima lea r ly IL -1αandCXCL1 D a t aA v a i l ab i l i t yS t a t em en t :A l l r e l e v a n td a t aa r e exp ress ion in the lungs ,asse lec t ivedep le t iono f thesece l lsresu l ted in the i rd im in ishedex w i t h i n t h ep a p e ra n d i t sS u p p o r t i n g I n f o rm a t i o n f i l e s . p res s ion ,wh ich in tu rnregu la ted theea r l yac cumu la t iono fneu t roph i ls in the lunga f te rA . Fund ing :J JOw a ss u p p o r t e db y f u n d i n g f r om t h e fum ig a tu s cha l lenge .Enhancemen to fpu lmona r yneu t roph i lrec ru i tmen tandan t i funga lac t i v N a t i o n a l I n s t i t u t e so fH e a l t hN IGMSg r a n tP 2 0 αs igna l ing . Incon t ra s t i t ybyCXCL1 t rea tmen tcou ld l im i t funga lg row th in theab senceo f IL -1 GM 1 0 3 5 0 0 (Q u i n n ,MT ;P I ) , t h eMSUA g r i c u l t u r a l o thero leo f IL -1 αinneu t roph i lrec ru i tmen t , the in f lamma someand IL -1 βwe reon lyes sen t ia l E x p e r im e n tS t a t i o n ,a n da ne q u i pm e n tg r a n t f r om t h e t M . J .M u r d o c kC h a r i t a b l eT r u s t .RACw a ss u p p o r t e d fo rop t ima lac t i va t iono fan t i funga lac t iv i t yo f ma c rophage s .Assu ch , P yc a rd-de f i c ien tm i ce b yg r a n t s f r om t h eN a t i o n a l I n s t i t u t e so fH e a l t hP 3 0 a re m i ld lysu scep t ib le toA . fum ig a tu sin fec t ion .Ta ken toge the r ,ou rda tare vea lcen t ra l ,non GM 1 0 3 4 1 5 (G r e e n ,WR ;P I ) ,P 3 0 -GM 1 0 6 3 9 4 redundan tro les fo r IL -1 αand IL -1βincon t ro l l ing A . fum ig a tu sin fe c t ion in the mu r ine lung . (S t a n t o n ,BA ;P I ) ,R 0 1 -A I 0 8 1 8 3 8 .KMS i sa l s o s u p p o r t e db yaN a t i o n a l I n s t i t u t e so fH e a l t h t r a i n i n g g r a n tT 3 2 -DK 0 0 7 3 0 1 (S t a n t o n ,BA ;P I ) .T h e f u n d e r s PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 1 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge h a dn o r o l e i ns t u d yd e s i g n ,d a t ac o l l e c t i o na n d a n a l y s i s ,d e c i s i o n t op u b l i s h ,o rp r e p a r a t i o no f t h e m a n u s c r i p t . Com p e t in g In t e r e s t s :T h ea u t h o r sh a v ed e c l a r e d t h a tn oc om p e t i n g i n t e r e s t se x i s t . Au tho rSumma r y A s p e r g i l lu sspp .a r eub iqu i tou s inth een v i ronm en t ,ande v enthou gh ind i v idu a l sa r e r e gu l a r l ye xpo s edtofun g a lspo r e sc l in i c a l in v a s i v ed i s e a s e i sar a r em an i f e s t a t i on .Inc on t r a s t , ind i v idu a l sw i thw e a k en ed immun es y s t em sd e v e lops e v e r ed i s e a s e ,su cha s in v a s i v e pu lm on a r ya sp e r g i l lo s i s( IPA ) .IPA i sa s so c i a t edw i the x t r em e l ypoo rp ro gno s e sand un a c c ep t a b l yh i gh mo r t a l i t yr a t e s .Know l ed g eg a in edf romund e r s t and in ghow immuno c omp e t en tm amm a l scon t ro lA s p e r g i l lu sch a l l en g ew i l lh e lpd e v e lopn ew immunom odu l a t o r ys t r a t e g i e sa im eda t imp ro v in gp a t i en tou t com e s .I t i sw e l lknownth a tn eu t r oph i l s and m on o c y t e sa r ec ru c i a l immun ec e l l sth a ta c tto l im i tfun g a lg row th .Ou rw o r kd em on s t r a t e sac en t r a lro l efo rth ec y to k in eIL 1 αino r ch e s t r a t in gth eop t im a lr e c ru i tm en to f e in f l amm a som ea r e mo r e imp o r t an t n eu t r oph i l sand mono c y t e s ,wh e r e a sIL 1βandth ina c t i v a t i ono fan t i fun g a la c t i v i t yo fth e mono c y t e s . Mo r eo v e r ,ou rs tud i e s ind i c a t eth a t + CCR 2m ono c y t e sa r er equ i r edfo rop t im a lp rodu c t iono fIL 1αinth e lun g so f A . fum i g a tu s ch a l l en g ed m i c e .Thu s ,ou rd a t ah i gh l i gh tac ru c i a lro l eo fth eIL 1c y t o k in e in m ed i a t in gan t i fun g a l immun i t ywh i ch m i gh tb eh a rn e s s edtot r e a tc l in i c a lc a s e so fIPA . In t roduc t ion Th em o ldA s p e r g i l lu s fum i g a tu si son eo fth e l e ad in gc au s e so f in v a s i v efun g a l in f e c t i on s .I t i s th ec au s a t i v ea g en to fs e v e r epu lmon a r y in f e c t ion ssu cha s in v a s i v epu lmon a r ya sp e r g i l l o s i s ( IPA ) ,ad i s e a s eo fh i gh mo rb id i t yand mo r t a l i t ywh i cha f f e c t s immuno comp rom i s ed ind i v idu a l s[ 1 ] .IPAh a sb e enad i s e a s eo fg row in gcon c e rno v e rr e c en td e c ad e sdu etoan in c r e a s e inth e immun o c omp rom i s edpopu l a t ion ,sp e c i f i c a l l yc au s edb yad v an c e s in immuno supp r e s s i v e d ru g sando r g ant r an sp l an t a t ion m e thod sa sw e l la sch emo th e r ap yt r e a tm en t s inc an c e rp a t i en t s[ 2 ] .Inadd i t ion ,th e r e i s in c r e a s in ge v id en c eth a tIPAc anspo r ad i c a l l yd e v e l op inc e r t a in immun o c omp e t en tpopu l a t ion s[ 3 ] .Cu r r en t l yth e r ea r enoa v a i l ab l ev a c c in e sfo rA . fum i g a tu s andan t i fun g a ld ru g sh a v ea mod e s tr a t eo fsu c c e s s in l im i t in gh i gh mo r t a l i t yr a t e st yp i c a l l y du et o l a t ed i a gno s i so fIPA[1 , 2 , 4 ] . Mo r eo v e r ,th er e c en tem e r g en c eo fd ru gr e s i s t an c eh a sfu r th e r l im i t edt r e a tm en top t ion s inc e r t a inc l in i c a lc a s e sandg eo g r aph i ca r e a s[ 5 , 6 , 7 ] . 3 Th econ c en t r a t iono fA s p e r g i l lu scon id i a ina i rs amp l e sr an g e sf rom0 . 2 –1 5con id i a /m andonad a i l yb a s i san ind i v idu a lc an inh a l ehund r ed so fcon id i a[ 8 ] .In mo s t immuno com p e t en t ind i v idu a l sth econ id i aa r et yp i c a l l yr emo v edf romth ebod yb yph y s i c a lb a r r i e r sen coun t e r edw i th inth er e sp i r a to r yt r a c t .How e v e r , i fth econ id i ae s c ap eth i sp r im a r y immun e b a r r i e randen t e rth e lun g ,th e yw i l lb er emo v edb ya l v eo l a rm a c roph a g e sando th e rr e s id en t + l eu ko c y t e s ,su cha sCCR 2mono c y t e s .Con v e r s e l y , inan ind i v idu a l l a c k in gasu f f i c i en t im mun er e spon s e ,A s p e r g i l lu scon id i aa r eab l etosw e l l ,g e rm in a t e ,andfo rmh yph a e , in v ad in g pu lmon a r yt i s su ew i thth epo t en t i altod i s s em in a t es y s t em i c a l l y[ 9 , 1 0 ] .Ou rund e r s t and in go f th e in f l amm a to r yp a thw a y sn e c e s s a r yfo ran immu no comp e t en t ind i v idu a lto m a in t a incon t ro lo fA .fum i g a tu swh i l econ s t an t l yb e in ge xpo s edtocon id i a i sanon go in ga r e a o f in v e s t i g a t ion . . fum i g a tu sg row th inth e lun gdu r in g in v a s i v e in f e c t ion i sh i gh l yd ep end en ton C on t r o lo fA r ap idr e c ru i tm en tanda c t i v a t iono f inn a t e immun ec e l l s , in c lud in gn eu t roph i l s[ 1 1 ] , in f l amm a t o r ym on o c y t e s[ 1 0 , 1 2 ] ,NKTc e l l s[ 1 3 ] ,andp l a sm a c y to idd end r i t i cc e l l s[ 1 4 ] .Th e imp o r t an c e . fum i g a tu si sh i gh l i gh t edb yp a t i en t s o fapp r op r i a t ea c t i v a t iono f l eu ko c y t e s inth econ t ro lo fA and m i c ew i thch ron i cg r anu lom a tou sd i s e a s eo r l a c k in gNADPHo x id a s esubun i t s ,b e in g h i gh l ysu s c ep t ib l etod e v e lop in gIPAa f t e rA . fum i g a tu sch a l l en g e[ 1 5 , 1 6 , 1 7 ] .Fu r th e rm o r e ,p a t i en t swh ob e com en eu t rop en i ca f t e rch emo th e r ap yfo rabon em a r rowt r an sp l an ta r ea ta PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 2 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge h i gh e rr i s kf o rd e v e lop in gIPA[1 8 , 1 9 , 2 0 , 2 1 ] .Inth e mu r in e mod e lo fA . fum i g a tu sin f e c t i on , CXCR 2and i t s l i g and sa r e impo r t an ts i gn a l in gcompon en t sfo rn eu t roph i lr e c ru i tm en t [ 2 2 , 2 3 , 2 4 ] .Inth eab s en c eo fCXCR 2s i gn a l in gdu r in gpu lmon a r yA . fum i g a tu sin f e c t i on ,th e r e i sad e c r e a s e inn eu t roph i lr e c ru i tm en ta lon gw i thah i gh e rfun g a lbu rd enand in c r e a s ed m o r t a l i t yr a t e ,s im i l a rtoan eu t rop en i c mod e l[ 2 3 ] .Add i t ion a l l y ,aro l efo rCCR 2s i gn a l in gh a s b e ensh ownt ob en e c e s s a r ytop romo t er e c ru i tm en tandd i f f e r en t i a t iono f in f l amm a t o r y m on o c y t e sf r omth ebon em a r row in toCD 1 1b+d end r i t i cc e l l suponA . fum i g a tu sin f e c t i on [ 1 0 , 1 2 ] .H ow e v e r ,th ee x a c ts equ en c eo fe v en t sn e c e s s a r yfo rth ee xp r e s s iono fch em o t a c t i c m o l e cu l e sf o rop t im a l l eu ko c y t er e c ru i tm en th a sno tb e enw e l le lu c id a t ed . Inadd i t i on , i th a sb e enshownth a tpo l ymo rph i sm s inth eIn t e r l eu k in( IL ) 1g en ec lu s t e r m a yb e imp o r t an t ind e t e rm in in gth esu s c ep t ib i l i t yo rr e s i s t an c etoIPA inhum an s[2 5 , 2 6 ] . 1 β ,a sw e l la s Th eIL 1g en ec lu s t e rcod e sfo rtwop ro in f l amm a to r yc y to k in e s ,IL 1αandIL th eIL 1r e c ep to ran t a gon i s t( IL 1R a )[ 2 7 ] .A l lth r e eo fth e s eIL 1f am i l ym emb e r sb indt oth e IL 1r e c ep to r ,t yp eI( IL 1R I ) .IL 1 αandIL 1 βenh an c eth e immun er e spon s ewh i l eIL 1R a c omp e t i t i v e l yb ind stoIL 1R I ,th e r eb yp r e v en t in gth eb ind in go fIL 1 αandIL 1 β[ 2 7 ] .A l th ou ghIL 1 αandIL 1 βa r ebo thp ro in f l amm a to r yc y to k in e sw i th inth es am eIL 1c y t o k in e f am i l y ,th e yd i f f e r inth e i rm a tu r a t ionp ro c e s s e s .IL 1 αc anb er e l e a s eda sp ro IL 1 αo rm a tu r e IL 1 αa f t e rc a lp a inc l e a v a g e .Ine i th e rfo rm i tc ana c t i v e l yb indtoIL 1R Iand m ed i a t ed own s t r e ams i gn a l in g[ 2 7 , 2 8 ] .Con v e r s e l y ,IL 1 βi sf i r s tp rodu c eda s in a c t i v ep ro IL 1 βwh i ch mu s t b ec l e a v edb yac a sp a s e 1con t a in in g in f l amm a som etoy i e ldth em a tu r eb io lo g i c a l l ya c t i v ec y t o k in e[ 2 9 ] .A f t e rfun g a le xpo su r e ,IL 1 βp rodu c t ionh a sb e en l in k edtoa c t i v a t iono fth e NLRP 3 in f l amm a som e[3 0 , 3 1 , 3 2 , 3 3 , 3 4 , 3 5 , 3 6 , 3 7 ] .M i c e l a c k in gth eNLRP 3 in f l amm a s om ea r e h i gh l ysu s c ep t ib l etod i s s em in a t edc and id i a s i s[3 0 , 3 6 , 3 7 ] .How e v e r ,th ero l eo f in f l amm a s om e a c t i v a t i onb yA . fum i g a tu s inv i v oi sun known . Th ero l eo fIL 1αinr e gu l a t in gth epu lmon a r y in f l amm a to r yr e spon s ea f t e r in f e c t iou s ch a l l en g e i s mu ch l e s sund e r s toodand i sana c t i v ea r e ao fr e s e a r ch .Impo r t an t l y ,s e v e r a l s tud i e sh a v eshownth a tIL 1 αandIL 1 βc anh a v enon r edund an tro l e s in in f e c t ionand in r f l amm a t ion .Sp e c i f i c a l l y , i th a sb e end emon s t r a t edth a tan in c r e a s eo fIL 1αco r e l a t edw i th e a r l yneu t roph i lr e c ru i tm en t ,wh i l eIL 1 βco r r e l a t edw i th m a c roph a g er e c ru i tm en tdu r in g l a t e rt im epo in t s ina mod e lo fs t e r i l e in f l amm a t ion[ 3 8 , 3 9 ] .Du r in gpu lmon a r yL e g i on e l l a pn eum o ph i l ain f e c t ionIL 1 αi se s s en t i a lfo re a r l yn eu t roph i lr e spon s e s[ 4 0 ] .Inas y s t em i c c and id i a s i s mod e l ,IL 1 αandIL 1 βp l a y ednon r edund an tro l e s inan t i fun g a l immun i t yb y enh an c in gan t i fun g a la c t i v i t yo f l euko c y t e sandr e c ru i tm en to fn eu t roph i l s ,r e sp e c t i v e l y [ 4 1 ] .How e v e r ,th ero l e ( s )o fIL 1c y tok in e sa f t e rch a l l en g ew i thth e mo ldA .fum i g a tu sr e m a in stob efu l l yd e f in ed . 1 βa f t e rinv i v o ch a l l en g ew i thA . H e r e ,w ed e l in e a t eth ed i f f e r en t i a lro l e so fIL 1αandIL fum i g a tu s andfu r th e rd e f in eth es equ en c eo fe v en t sr equ i r edfo r l eu ko c y t er e c ru i tm en ta f t e rA . fum i g a tu s ch a l l en g e .Sp e c i f i c a l l y ,w eob s e r v ed ,un l i k eth ed i s e a s e sc au s edb yth ey e a s tC an d i d a a l b i c an s[ 3 0 , 3 6 , 3 7 ] ,th a tth e in f l amm a som e i sno te s s en t i a lfo rp r e v en t in gs e v e r e in v a s i v epu l m on a r ya sp e r g i l lo s i s ,bu tdo e sp a r t i c ip a t e in in i t i a t in gth efu l lan t i fun g a la c t i v i t yo f l eu k o c y t e s . αs i gn a l in gth rou ghIL 1R I i sc ru c i a lfo rth econ t ro lo fpu lm on a r yA . Ins t a r kc on t r a s t ,IL 1 fum i g a tu s in f e c t ionth rou ghop t im a l l eu ko c y t er e c ru i tm en t ,wh i chco r r e l a t edw i thCXCL 1e x p r e s s i on .CCR 2+mono c y t e sr e gu l a t edth ee a r l ye xp r e s s iono fIL 1αandCXCL 1 ,andp r om o t ed e a r l yn eu t r oph i la c cumu l a t ion inth ea i rw a y s .T r e a tm en to fI l 1 r 1 -d e f i c i en tm i c ew i thach em o k in ekn ownt oenh an c en eu t roph i lr e c ru i tm en tenh an c ed immun i t ya g a in s tpu lm on a r yA . in f e c t ion .Thu s ,ou rs tud i e sd e f in eth esp e c i f i cs equ en c eo fe v en t sr e gu l a t edb yb o th fum i g a tu s IL 1 αandIL 1 βn e c e s s a r yfo rcon t ro lo fA . fum i g a tu sg row thand lun gd am a g ew i th inth e r e sp i r a t o r yt r a c t . PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 3 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge F igu re1 . C57BL /6 m iceshowd i f fe ren t ia lexp ress iono f IL -1αand IL -1ßa f te rA .fum iga tusin fec t ion . M i cewe re in fe c ted i . t .w i th5×107CEA10con id iaanda t ind i ca ted t ime -po in t s ,m i cewe reeu than ized , b ron choa l veo la r la vage f lu id(BALF )co l le c ted ,and lung t i s suehomogen i zed . IL -1β(A ) , IL -18 (B ) , IL -1 α(C ) , and IL -1Ra(D )le ve l s in lunghomogena te( IL -1 α)andBALF( IL -1 β, IL -18 ,and IL -1Ra )we re measu redus ing P ro ca r taP le x Mou seC y to k ine&Chemo k ine36 -p le x Immunoa s sa yo rEL ISA .Da taa rerep resen ta t iveo f fou r m i cepe r t imepo in tand two independen te xpe r imen t s .Ea chdo trep re sen t s the mean±oneSEM . d o i : 1 0 . 1 3 7 1 / j o u r n a l . p p a t . 1 0 0 4 6 2 5 . g 0 0 1 Resu l ts D i f fe ren t ia l tempo ra le xp re s s ionk ine t i c so f IL -1c y to k ine fam i l y membe r s a f te rA spe rg i l lu sfum iga tu scha l lenge T oe x am in eth ee a r l ypu lmon a r y in f l amm a to r ym i l i eu indu c eda f t e rA . fum i g a tu sch a l l en g e , b r on ch o a l v e o l a r l a v a g ef lu id(BALF )w a sco l l e c t ed6 ,1 2 ,2 4 ,and4 8ha f t e r in t r a t r a ch e a l( i . t . ) 7 in s t i l l a t i ono f *5× 1 0 con id i ao fth eCEA 1 0s t r a ino fA . fum i g a tu s.O fno t e ,bo thth e in f l am m a s om e -d ep end en tc y to k in e sIL 1β( F i g .1A)andIL 1 8( F i g .1B)w e r ee xp r e s s edw i th inap p r o x im a t e l y6ha f t e rA . fum i g a tu sch a l l en g e .Incon t r a s t ,IL 1 α( F i g .1C)andIL 1R a( F i g .1D) w e r ee xp r e s s ed ina l in e a r l y in c r e a s in gm ann e rdu r in gth ef i r s t4 8h .Thu s ,A . fum i g a tu sch a l l en g er e su l t s int empo r a l l yd i s t in c te xp r e s s iono fIL 1c y to k in ef am i l ym emb e r s . I l1 r1 -de f i c ien tm i cea reh igh l ysu s cep t ib le topu lmona r y A spe rg i l lu s fum iga tu sin fe c t ion Inon ec oh o r to fhum anp a t i en t s i th a sb e enshownth a tacomp l e xpo l ymo rph i sm inth eI l 1 a , I l 1 b ,and I l 1 rng en e s ,wh i chw a sa s so c i a t edw i thd e c r e a s edIL 1d ep end en t in f l amm a t o r y e v en t s ,r e su l t ed in in c r e a s edr i s kfo rth ed e v e lopm en to fIPA[ 2 5 ] .B e c au s eo fth i sp r i o rc l in i c a l o b s e r v a t i onp lu sou rf ind in gth a tbo thIL 1αandIL 1 βa r ep rodu c ed inth e lun g sa f t e rA . ch a l l en g e( F i g .1) ,w equ e s t ion edwh e th e rIL 1R Is i gn a l in gw a sc r i t i c a l inth ec l e a r fum i g a tu s an c eo fA . fum i g a tu sf romth e lun g .Tog lob a l l yt e s tth ero l eo fIL 1s i gn a l in g in l im i t in gA . fum i g a tu s g r ow th inth er e sp i r a to r yt r a c to fm i c e ,w ech a l l en g edC 5 7BL / 6andI l 1 r 1 -d e f i c i en t 7 m i c ew i th*5× 1 0 con id i ao fA . fum i g a tu sCEA 1 0d e l i v e r edv i ath e i . t .rou t e .Su b s equ en t l y , c on t r o lo fA . fum i g a tu sinth er e sp i r a to r yt r a c tw a sa s s e s s edb yh i s to lo g i c a lan a l y s i sa t2 4 ,4 8 , and7 2ha f t e r in s t i l l a t ion .S t r i k in g l y ,G ro co t t -Gomo r im e th en am in es i l v e r(GM S )s t a in in go f PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 4 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge F igu re2 .I l1 r1 -de f ic ien tm icea reh igh lysuscep t ib letoAspe rg i l lusfum iga tusin fec t ion . Age -ma t chedC57BL /6o rI l1 r1 -de f i c ien tm i cewe re in fec ted i . t . id iaanda t ind i ca ted t ime -po in t s ,m i cewe reeu than i zed ,BALFco l le c ted ,and lung ssa ved fo rh i s to log i ca lana l y s i s .(A )Fo rma l in f i xed w i th5×107CEA10con lungswe repa ra f f inembedded ,se c t ioned ,ands ta inedw i thH&E( top )o rGMS(bo t tom ) fo rana l y s i sb ym i c ro s cop y .Rep re sen ta t i ve lungsec t ions f rom C57BL /6andI l1 r1 -de f ic ien tm i ce in fe c tedw i thCEA10 fo r48ha reshownu s inge i the r the4×( le f t )o r20×( r igh t )ob je c t i ve s .(B )A .fum iga tu sge rm ina t ionra tes we reassessedove r the f i rs t72ho f in fe c t ionb ym i c ro s cop i ca l l ycoun t ingbo th thenumbe ro fcon id iaandnumbe ro fge rm l ing s inGMS s ta inedsec t ion .(C ) − −/ − Su rv iva lo fC57BL /6 ,P yca rd−/ ,and I l1 r1 m i cecha l lenged i . t .w i th1 .5×107A .fum iga tu s(CEA10 )con id iawa s then mon i to red fo rsu r v i va love r the f i rs t96h (Man te l -Cox log rank tes t ,p=0 .0002 ) .Da taa rerep re sen ta t i veo f2 independen te xpe r imen t sa tea ch t imepo in tcon s i s t ingo fa t lea s t5 m i cepe rg roup .(D ) To ta l mac rophage( le f tpane l )andneu t roph i l( r igh tpane l )re c ru i tmen t in theBALFwa s mea su reda t12 ,24 ,and48hpo s t in fe c t ion .Da taa rerep resen ta t ive o fa t leas t2 independen texpe r imen t sa tea ch t imepo in tcon s i s t ingo f3–5 m i cepe rg roup .Ba rg raph sshow theg roup mean±oneSEM .S ta t is t ica l ly s ign i f ican td i f fe renceswe rede te rm inedu s ingS tuden t ’ s t te s t( *p<0 .05 ;**p<0 .01 ) . d o i : 1 0 . 1 3 7 1 / j o u r n a l . p p a t . 1 0 0 4 6 2 5 . g 0 0 2 lun gt i s su ef r om I l 1 r 1 -d e f i c i en tm i c er e v e a l edth ep r e s en c eo fas i gn i f i c an tf r a c t i ono fg e rm in a t in g A . fum i g a tu scon id i aa t4 8hth a tw a sno tob s e r v ed inC 5 7BL / 6m i c e( F i g .2A) . Wh enth e p r e s en c eo fg e rm in a t in gA . fum i g a tu scon id i aw a squ an t i f i edo v e rth ef i r s t7 2h ,C 5 7BL / 6m i c e d i sp l a y ed m in im a lg e rm in a t ionth a tw a s*4%a t4 8hb e fo r er e so l v in g( F i g .2B) ; inc on t r a s t , I l 1 r 1 -d e f i c i en tm i c ed i sp l a y edas i gn i f i c an t imp a i rm en t incon t ro l l in gA . fum i g a tu sg e rm in a t i onw i th in2 4h( F i g .2B) .B y4 8h ,th em a jo r i t yo ffun g a lcon id i a inI l 1 r 1 -d e f i c i en tm i c ew e r e g e rm in a t ed( F i g .2B) .H i gh l e v e l so fg e rm in a t i onw e r eob s e r v ed inth em a j o r i t yo fI l 1 r 1 -d e f i c i en t i g .2C) .T os t r en g th enou r m i c ean dth i sw a sa s so c i a t edw i ths i gn i f i c an tm o r t a l i t y in th o s em i c e(F c on c lu s i onth a tIL 1R Is i gn a l in gw a sc ru c i a lfo rc on t ro l l in gA . fum i g a tu sg e rm in a t i on inth e lun g sr a th e rth anad e v e l opm en t i s su e inth e I l 1 r 1 -d e f i c i en tm i c e ,w et r e a t e dC 5 7BL / 6m i c e in t r a p e r i t on e a l l y( i .p . )w i th2 0 0μ go fh IL 1 r a ,wh i chan t a gon i z e sIL 1 αandIL 1 β ,o rp l a c e b oe v e r y 7 1 0 2 4hs t a r t in gon ed a yp r io rtoch a l l en g in gm i c ew i th*5× c on id i ao fA . fum i g a tu s.Lun g t i s su e f r omh IL 1 r a t r e a t edC 5 7BL / 6m i c er e v e a l edth ep r e s en c eo fas i gn i f i c an t f r a c t iono fg e rm in a t in g A . fum i g a tu scon id i aa t4 8h ,wh i chw a sno tob s e r v ed inp l a c e b ot r e a t edC 5 7BL / 6m i c e( S 1F i g . ) . T a k ent o g e th e r ,th e s er e su l t ss t ron g l ysuppo r tth econ c lu s ionth a tIL 1R Is i gn a l in g i sc r i t i c a lf o r . fum i g a tu ss t r a inCEA 1 0pu lmon a r yp r o l i f e r a t ionandho s td am a g e . p r e v en t i ono fA N eu t r oph i l sand m a c roph a g e sa r ew id e l ya c know l ed g edtob ec r i t i c a le f f e c to rc e l l sf o rc l e a r in g A . fum i g a tu sf romth e lun g s[ 4 2 ] .A s s e s s in gc e l lu l a rr e c ru i tm en tv i ad i f f e r en t i a lm i c r o s c op i cc oun t in go fc y to sp in ss t a in edw i thD i f f -Qu i kf romth eb ron cho a l v eo l a r l a v a g ef lu ida t1 2 ,2 4 , and4 8hp o s t ch a l l en g ed emon s t r a t edas i gn i f i c an t imp a i rm en t inn eu t roph i lr e c ru i tm en ta t e a cht im ep o in tan a l y z ed ,wh i l em a c roph a g er e c ru i tm en tw a ss im i l a rb e tw e enC 5 7BL / 6and PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 5 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge I l 1 r 1 -d e f i c i en tm i c ea te a r l yt im epo in t sa f t e rA . fum i g a tu sch a l l en g e ,bu tw e r ed e c r e a s edb y 4 8h( F i g .2D) . Wh en in f l amm a to r y in f i l t r a t e sw i th inth eBALFand lun gp a r en ch ym aw e r e a s s e s s eda t1 2 ,2 4 ,and3 6hb yf lowc y tom e t r yas im i l a rd e c r e a s e inn eu t roph i l s inb o thc om + l 1 r 1 -d e f i c i en tm i c e( S 2A S 2BF i g . ) ,wh i l eCD 1 1 b p a r tm en t sw a sob s e r v ed inth eI m a c r oph a g e s + + ( S 2CF i g . ) ,CD 1 1 ca l v eo l a rm a c roph a g e s( S 2DF i g . ) ,andCD 1 0 3d end r i t i cc e l l s(S 2EF i g . ) w e r ef ounda ts im i l a r l e v e l sa sob s e r v ed inC 5 7BL / 6m i c e .W en e x tqu e s t ion edwh e th e r l eu k o c y t er e c ru i tm en tw a sd im in i sh ed inM yd 8 8-d e f i c i en tm i c eb e c au s e i t i sth ek e ys i gn a l in gad ap t e rf o rIL 1R I ,a sw e l la sTLR s[ 2 7 , 4 3 ] ,andM yd 8 8-d e f i c i en tm i c eh a v ean imp a i r eda b i l i t yt o c on t r o lpu lm on a r yA . fum i g a tu sg row th[ 4 4 ] .Ind e ed ,M yd 8 8-d e f i c i en tm i c ee xh i b i t edd e f e c t i v e n eu t r oph i lr e c ru i tm en t1 2and2 4ha f t e rA . fum i g a tu sin s t i l l a t ion ,bu tno rm a lm a c r oph a g er e c ru i tm en ta tth e s ee a r l yt im epo in t s( S 3F i g . ) .Thu s ,m i c ed e f i c i en t inI l 1 r 1andM y d 8 8a r eh i gh A . fum i g a tu sf romth e lun g s ,wh i chco r r e l a t e sw i thd e f e c t s l y imp a i r ed inth e i rab i l i t ytoc l e a r ine a r l yn eu t r oph i lr e c ru i tm en ttoth e lun g s . P y ca rd -de f i c ien tm i cea reon l ym i ld l ysu s cep t ib le topu lmona r y A spe rg i l lu sfum iga tu se xpo su re I t i sw e l ld o cum en t edth a tIL 1 βs e c r e t ionr equ i r e sth efun c t iono fth e in f l amm a s om e[ 2 9 ]and th a tb o thth e in f l amm a som eandIL 1 βa r e impo r t an t in l im i t in gs y s t em i cfun g a l in f e c t i on s [ 3 0 , 3 3 , 3 5 , 3 6 , 3 7 , 4 1 , 4 5 ] .R e c en tinv i t r o s tud i e sh a v eshownth a tth eNLRP 3 -A SC -C ap a s e 1 in f l amm a s om ec anb et r i g g e r edb y A . fum i g a tu s[ 3 1 ] ,bu tth einv i v o r e l e v an c eo fth i st r i g g e r in g du r in gA . fum i g a tu sin f e c t ionr em a in sun known . Mu l t ip l e in f l amm a som ecomp l e x e se x i s t ,bu t A SC(P y c a r d) i sac en t r a lad ap t e rp ro t e inn e ed edfo rm a tu r a t iono fIL 1 βandIL 1 8[ 2 9 ] .Thu s , . fum i g a tu sch a l l en g e ,w ech a l l en g edC 5 7BL / t od e t e rm in eth ero l eo fth e in f l amm a som ea f t e rA 7 6andP y c a r d-d e f i c i en tm i c ew i th*5× 1 0 con id i ao fA . fum i g a tu sCEA 1 0 i . t . ;su b s equ en t l y , c on t r o lo fA . fum i g a tu sinth er e sp i r a to r yt r a c tw a sa s s e s s edb yh i s to lo g i c a lan a l y s i sa t2 4 ,4 8 , and7 2ha f t e r in s t i l l a t ion .GM Ss t a in in go f lun gt i s su ef romP y c a rd-d e f i c i en tm i c er e v e a l edth e p r e s en c eo fg e rm in a t in gA . fum i g a tu scon id i aa te l e v a t edf r equ en c i e scomp a r edt oC 5 7BL / 6 m i c ea t4 8h(F i g .3A -B) ,bu tth i sph eno t yp ew a s l e s ss e v e r eth anwh a tw a sob s e r v ed inI l 1 r 1 d e f i c i en tm i c eandd idno tr e su l t in mu r in e mo r t a l i t y(F i g .2) . Wh enth ep r e s en c eo fg e rm in a t A . fum i g a tu scon id i aw a squ an t i f i edo v e rth ef i r s t7 2h ,C 5 7BL / 6m i c ed i sp l a ym in im a lg e r in g m in a t i onth a tw a s*3%a t4 8h( F i g .3B) .P y c a rd-d e f i c i en tm i c ed i sp l a y edno rm a lc on t r o lo fA . fum i g a tu s g e rm in a t iona t2 4h .How e v e r ,b y4 8h imp a i r edcon t ro lo fA . fum i g a tu sg e rm in a t i on ( *2 2% )w a sob s e r v ed ,bu tth e s em i c ew e r eu l t im a t e l yab l etor e so l v eth eA . fum i g a tu sch a l l en g e( F i g .3B) .B e c au s e ,n eu t roph i l sand m a c roph a g e sa r ew id e l ya c know l ed g edt ob ec r i t i c a l e f f e c t o rc e l l sf o rc l e a r in gA . fum i g a tu sf romth e lun g s[ 4 2 ]andw e r ed im in i sh ed inth ea b s en c e o fIL 1R Is i gn a l in g(F i g .2C) ,w en e x ta s s e s s ed in f l amm a to r yc e l lr e c ru i tm en t inBALFv i ad i f f e r en t i a lm i c r o s cop i ccoun t in go fc y to sp in ss t a in edw i thD i f f -Qu i kf romth eb r on ch o a l v e o l a r l a v a g ef lu ida t1 2 ,2 4 ,and4 8ha f t e r in s t i l l a t ion .In t e r e s t in g l y ,C 5 7BL / 6and P y c a r d-d e f i c i en t m i c ed em on s t r a t edequ i v a l en tn eu t roph i land m a c roph a g er e c ru i tm en ta te a cht im ep o in tan a l y z ed( F i g .3C) . Mo r eo v e r ,wh enth e in f l amm a to r y in f i l t r a t e sw i th inth eBALFand lun gp a r en ch ym aw e r ea s s e s s eda t1 2 ,2 4 ,and3 6hb yf lowc y tom e t r yth enumb e ro fn eu t r oph i l s inth e BALFand lun gp a r en ch ym a ,CD 1 1b+m a c roph a g e s ,CD 1 1 c+a l v eo l a rm a c roph a g e s ,and + CD 1 0 3d end r i t i cc e l l s inth e lun gp a r en ch ym aw e r efounda ts im i l a r l e v e l s inC 5 7BL / 6and P y c a r d-d e f i c i en tm i c e( S 2F i g . ) . Wh enw ee x am in edth ee xp r e s s iono fIL 1 βinth eBALFo f P y c a r d-d e f i c i en tm i c e ,noe xp r e s s iono fIL 1 βa t1 2hw a sob s e r v edwh i l es i gn i f i c an t l e v e l sw e r e i g .3D) ;how e v e r ,wh enIL 1 αw a se x am in ed inth e lun gp a r en ch y d e t e c t ed inC 5 7BL / 6m i c e(F m aw eo b s e r v edequ i v a l en t l e v e l so fc y to k in ee xp r e s s ion(F i g .3E) ,su g g e s t in gth a tIL 1 αs i gn a l in gc ou lds t i l lb ea c t i v a t ed inth e P y c a rd-d e f i c i en tm i c e . PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 6 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge F igu re3 .Pyca rd-de f ic ien tm icea re m i ld lysuscep t ib letoA .fum iga tusin fec t ion . Age -ma t chedC57BL /6o rP yca rd-de f i c ien tm i cewe re in fec ted i . t .w i th 5×107CEA10con id iaanda t ind i ca ted t ime -po in t sm i cewe reeu than i zed ,BALFco l le c ted ,and lung ssa ved fo rh i s to log i ca lana l y s i s .(A )Fo rma l in f ixed lungs we repa ra f f inembedded ,se c t ioned ,ands ta inedw i thH&E( top )o rGMS(bo t tom ) fo rana l y s i sb ym i c ro s cop y .Rep re sen ta t i ve lungse c t ion s f romC57BL /6 andP yca rd-de f ic ien tm ice in fe c tedw i thCEA10 fo r48ha reshownu s inge i the r the4×( le f t )o r20×( r igh t )ob je c t i ve s .(B )A .fum iga tu sge rm ina t ionra teswe re assessedove r the f i rs t72ho f in fe c t ionb ym i c ro s cop i ca l l ycoun t ingbo th thenumbe ro fcon id iaandnumbe ro fge rm l ing s inGMS s ta inedsec t ion .(C )To ta l mac rophage( le f tpane l )andneu t roph i l( r igh tpane l )re c ru i tmen t in theBALFwa s mea su reda t12 ,24 ,and48hpo s t in fe c t ion .(D )IL -1 βle ve ls in the b ronchoa l veo la r lavage f lu id(BALF )and(E )IL -1 αle ve l s in the lungpa ren ch ymawe rea s se s sed f romC57BL /6and P yca rd-de f i c ien tm i ce in fec ted i . t .12h id ia . IL -1αand IL -1βle ve l s inBALFwe re mea su redb yEL ISA . (B -E )A l lda taa rerep re sen ta t i veo fa t lea s t2 independen t p r io rw i th5×107CEA10con expe r imen tsa teach t imepo in tcon s i s t ingo f3–5 m i cepe rg roup .Ba rg raph sshow theg roup mean±oneSEM .S ta t i s t i ca l l ys ign i f i can td i f fe renceswe re de te rm inedus ingS tuden t’ s t te s t( *p<0 .05 ;**p<0 .01 ) .LOD= l im i to fde te c t ion .(F -G )Thean t i funga la c t i v i t yo fbone ma r row -de r i ved mac rophage s (BMDM )we reassessedinv i t ro u s ing thep re v iou s l yde s c r ibedXTTa s sa y [46] . (E )BMDM swe reob ta ined f romC57BL /6(WT )o rP yca rd-de f ic ien t(ASC ) )BMDM s f romC57BL /6 m icewe re m ice .AnXTTassaywaspe r fo rmedu s ingBMDM f romea ch mou ses t ra in inbo thno rmo x i candh ypo x i ccond i t ion s .(B ob ta inedand incuba tedw i th i so t ypecon t ro lan t ibod y , IL -18neu t ra l i z ingan t ibod yo r IL -1ßneu t ra l i z ingan t ibod y .The seBMDM swe re thenused inanXTT assay inbo thno rmox icandh ypo x i ccond i t ion s .(E -F )Da taa rerep re sen ta t i veo f fou rb io log i ca lrep l i ca te s inea chg roup .Ba rg raph sshow theg roup mean± oneSEM .S ta t is t ica l lys ign i f i can td i f fe ren ce swe rede te rm inedu s inganone -wa yANOVAw i thBon fe r ron i’ spo s t te s t(1p<0 .05compa red toC57BL /6ce l ls unde r thesamecond i t ion s ) . d o i : 1 0 . 1 3 7 1 / j o u r n a l . p p a t . 1 0 0 4 6 2 5 . g 0 0 3 S in c eP y c a rd-d e f i c i en tm i c ed idno td emon s t r a t e imp a i r ed l eu ko c y t er e c ru i tm en ta f t e rA . fum i g a tu s ch a l l en g e ,w en e x tsou gh ttoqu an t i t a t eth ean t i fun g a la c t i v i t yo fm a c r oph a g e sf r om C 5 7BL / 6andP y c a rd-d e f i c i en tm i c e .H yph a ld am a g e indu c edb ym a c roph a g e sw a sa s s e s s ed u s in gth eXTTh yph a ld am a g ea s s a y ,wh i ch m e a su r e sfun g a lc e l lm e t abo l i ca c t i v i t ya san ind i r e c tm e a su r eo ffun g a lv i ab i l i t y[ 4 6 ] .C 5 7BL / 6andP y c a rd-d e f i c i en tbon em a r r ow -d e r i v ed m a c r oph a g e s indu c eds im i l a rh yph a ld am a g ewh enco cu l tu r edw i thA . fum i g a tu sund e r i g .3F,y e l lowb a r s ) .In t e r e s t in g l y ,ap r e v iou sr epo r td em on s t r a t eden n o rm o x i cc ond i t ion s(F h an c edan t i fun g a la c t i v i t yo f l eu ko c y t e sa g a in s tfun g a lh yph a eund e rh ypo x i cc ond i t i on s[4 6 ] , PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 7 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge wh i cho c cu r sw i th inth e lun g sa f t e rA . fum i g a tu sch a l l en g eanda ts i t e so fm i c ro b i a l in f e c t i on [ 4 7 , 4 8 ] .In t r i gu in g l y ,t im e -po in t swh enh ypo x i a i sob s e r v eda l soco in c id e sw i thth er e c ru i tm en t o f in f l amm a t o r ymono c y t e stoth es i t eo f in f e c t i on[ 1 2 ] .Thu s ,w esou gh tt ot e s tth ec on t r i bu t i on o fth e in f l amm a som e to th ean t i fun g a lr e sp on s eo fm a c r oph a g e sund e rh ypo x i cc ond i t i on s .S im i l a rt oth ep r e v iou s f ind in g s[ 4 6 ] ,C 5 7BL / 6bon em a r r ow -d e r i v edm a c r oph a g e sd i sp l a y eds i gn i f i F i g .3F) .Incon t r a s t ,P y c a r dc an t l yenh an c edan t i fun g a la c t i v i t ywh encu l tu r ed inh ypo x i a( d e f i c i en tm a c r oph a g e s indu c ed l e s sh yph a ld am a g ewh enco cu l tu r edw i thA . fum i g a tu sund e r h y p o x i cc ond i t i on s(F i g .3F,b lu eb a r s ) .S in c ea c t i v a t i ono fth e in f l amm a som et r i g g e r sth er e l e a s e o fb o thIL 1 βandIL 1 8w en e x ts ou gh tt oa s s e s swh i ch in f l amm a som e -d ep end en tc y t o k in ew a s r e sp on s i b l ef o r in c r e a s in gth ean t i fun g a la c t i v i t yo fm a c r oph a g e s inh ypo x i a .C 5 7BL / 6m a c r o ph a g e sw e r et r e a t edw i than i s o t yp econ t r o lan t i bod y ,an t i IL 1βan t ib od y ,o ran t i IL 1 8an t i b od y . fum i g a tu sg e rm l in g s .Su b s equ en t l y , fun g a ld am a g ew a sa g a ina s du r in gth ec o cu l tu r ew i thA s e s s edb yanXTTa s s a y .M a c roph a g e st r e a t e dw i than i s o t yp econ t r o lan t ib od yd i sp l a y in c r e a s ed an t i fun g a la c t i v i t y inh ypo x i a .Th i s in c r e a s edan t i fun g a la c t i v i t yw a s lo s t inth ep r e s en c eo fa b l o c k in gan t i IL 1 βan t i bod y ,bu tno tab l o c k in gan t i IL 1 8an t ib od y( F i g .3G) .Co l l e c t i v e l y , th e s ed a t ad emon s t r a t eth a tm i c ed e f i c i en t inP y c a r da r em i ld l y imp a i r ed inth e i ra b i l i t yt oc l e a r A . fum i g a tu sf romth e lun g s ,wh i chco r r e l a t e dw i th inv i t r o d e f e c t s inth ean t i -h yph a la c t i v i t y in du c edb yIL 1βinh ypo x i a ,r a th e rth an in f l amm a t o r yc e l lr e c ru i tm en ttoth e lun g s . An t i IL -1αt rea tmen t impa i r spu lmona r yre c ru i tmen to f leu ko c y te s , enhan c ing thesu s cep t ib i l i t yo fm i ce topu lmona r yA spe rg i l lu sfum iga tu s in fe c t ion A sI l 1 r 1 -d e f i c i en tm i c ew e r e mu ch l e s sab l etocon t ro lA . fum i g a tu sg e rm in a t ionth an P y c a r d-d e f i c i en tm i c e(F i g .2&3 )andP y c a rd-d e f i c i en tm i c es t i l lp rodu c edIL 1 αinth e lun g s ( F i g .3D) ,w en e x tsou gh ttound e r s t andth ero l eIL 1 αp l a y ed inth ec l e a r an c eo fA . fum i g a tu s f r omth e lun g .Tod e t e rm in eth ero l eo fIL 1 αa f t e rA . fum i g a tu sch a l l en g e ,w et r e a t edC 5 7BL / 6 m i c e i .p .w i th4 0μgo fgo a tI gGo ran t i IL 1 α2 4hp r io rtoand2 4ha f t e rch a l l en g in gm i c e 7 w i th*5× 1 0 con id i ao fA . fum i g a tu s.Con t ro lo f A . fum i g a tu sinth er e sp i r a to r yt r a c tw a s a s s e s s edb yh i s to lo g i c a lan a l y s i sa t4 8ha f t e r in s t i l l a t ion .GM Ss t a in in go f lun gt i s su ef r om an t i IL 1 αt r e a t edC 5 7BL / 6m i c er e v e a l edth ep r e s en c eo fg e rm in a t in gA . fum i g a tu sc on id i aa t s i gn i f i c an t l yh i gh e rf r equ en c i e sth ans e en ingo a tI gGt r e a t edC 5 7BL / 6m i c e( F i g .4A&B) . A s l eu k o c y t er e c ru i tm en ttoth e lun g sw a ss i gn i f i c an t l y imp a i r ed inI l 1 r 1 -d e f i c i en t ,bu tn o t P y c a r d-d e f i c i en t ,m i c efo l low in gA . fum i g a tu sch a l l en g e ,w en e x ta s s e s s ed in f l amm a t o r yc e l l r e c ru i tm en tt oth eBALFv i ad i f f e r en t i a lm i c ro s cop i ccoun t in go fc y to sp in ss t a in edw i thD i f f Qu i kf r omth eb ron cho a l v eo l a r l a v a g ef lu ida t2 4and4 8hpo s t ch a l l en g e .In t e r e s t in g l y ,an t i αt r e a t edC 5 7BL / 6m i c ed emon s t r a t edr edu c edn eu t roph i lr e c ru i tm en ta t2 4hp o s t A . IL 1 fum i g a tu s ch a l l en g e( F i g .4C) .Add i t ion a l l y ,t r e a tm en to fP y c a rd-d e f i c i en tm i c ew i than t i IL 1 α s i gn i f i c an t l yenh an c edth esu s c ep t ib i l i t yo ftho s em i c etoA . fum i g a tu sch a l l en g e ,m i r ro r in g wh a tw a sf ound inI l 1 r 1 -d e f i c i en tm i c e( S 4F i g . ) .Thu s ,b lo c k in gIL 1 αin m i c es i gn i f i c an t l y im . fum i g a tu sch a l l en g er e su l t in g in p a i r se a r l yn eu t roph i lr e c ru i tm en ttoth e lun g se a r l ya f t e rA imp a i r edc on t ro lo f A . fum i g a tu sg e rm in a t ion inth e lun g s . IL -1 αs igna l ingenhan ce s thee xp re s s iono fCXCL1 A sb o thI l 1 r 1 -d e f i c i en tm i c eandan t i IL 1 αt r e a t edC 5 7BL / 6m i c ed i sp l a y eds i gn i f i c an t l yd e c r e a s edc e l lu l a r in f i l t r a t ion in toth eBALF(F i g .2Dand4C ) ,w en e x tsou gh ttound e r s t andth e α,IL 1R I ,andth e in f l amm a som ep l a y ins e t t in gupth e in f l amm a t o r ym i l i eu r o l e sth a tIL 1 w i th inth e lun g s .Thu s ,w ech a l l en g edfou rcoho r t so fm i c e ,C 5 7BL / 6t r e a t edw i th4 0μgo f g o a tI gG ,C 5 7BL / 6t r e a t edw i th4 0μgo fan t i IL 1 α, I l 1 r 1 -d e f i c i en t ,andP y c a rd-d e f i c i en t , PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 8 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge F igu re4 . C57BL /6 m icet rea tedw i th IL -1αneu t ra l i z ingan t ibodywe re mo resuscep t ib letoAspe rg i l lus fum iga tusin fec t ion . C57BL /6 m i ce t rea tedw i th i so t ypecon t ro lan t ibod yo r IL -1αneu t ra l i z ingan t ibodywe re 7 in fe c ted i . t .w i th5×10 CEA10con id ia .A t the ind i ca ted t imepo in t sm i cewe reeu than i zed ,BALFco l lec ted and lung ssa ved fo rh i s to log i ca lana l y s i s .(A )Fo rma l in f i xed lung swe repa ra f f inembedded ,sec t ionedand s ta inedw i thH&E( top )o rGMS(bo t tom ) fo rana l y s i sb ym i c ro s cop y .Rep re sen ta t i ve lungsec t ions f rom C57BL /6m i ce t rea tedw i th i so t ypecon t ro lan t ibod y( le f t )o rw i than t i IL -1αan t ibod y( r igh t )and in fec tedw i th CEA10 fo r48ha reshownu s inge i the r the4×( le f t )o r20×( r igh t )ob je c t i ve s .(B )A .fum iga tu sge rm ina t ion ra te sa t48ha f te rcha l lengewa sde te rm inedb ym i c ro s cop i ca l l ycoun t ingbo th thenumbe ro fcon id iaand numbe ro fge rm l ing s inGMS s ta inedse c t ion .(C )To ta l ma c rophage( le f tpane l )andneu t roph i l( r igh tpane l ) re c ru i tmen t in theBALFwa s mea su reda t24and48hpo s t in fe c t ionv iac y to sp in s .Da taa rerep resen ta t iveo f two independen te xpe r imen t scon s i s t ingo f4 –5 m i cepe rg roup .Ba rg raph sshow theg roup mean±one SEM .S ta t i s t i ca l l ys ign i f i can td i f fe ren ce swe rede te rm inedu s ingaS tuden t’ s t te s t(*p<0 .05 ,***p<0 .001 ) . d o i : 1 0 . 1 3 7 1 / j o u r n a l . p p a t . 1 0 0 4 6 2 5 . g 0 0 4 7 w i th*5× 1 0 con id i ao fA . fum i g a tu s.Tw en t y fou rhou r sa f t e rch a l l en g e ,th e in f l amm a t o r y m i l i eu inth e lun gp a r en ch ym aw a sa s s e s s edb ya1 2 -p l e x mu l t ip l e xc y to k in ea s s a y .An t i IL 1α t r e a tm en t ,r a th e rth anP y c a rd-d e f i c i en c y , l a r g e l ym i r ro r edth e in f l amm a to r yc y t o k in ed e f e c t s f ound inth eI l 1 r 1 -d e f i c i en tm i c e( F i g .5)f i t t in gw i thth eb io lo g i c a lou t com e so fA . fum i g a tu s ch a l l en g e intho s em i c e .Sp e c i f i c a l l y ,TNF α,CCL 3 ,andCCL 4e xp r e s s ionw a sn o td im in i sh ed inth ea b s en c eo fIL 1 α,IL 1R I ,o rA SC( F i g .5) .In t e r e s t in g l y ,CXCL 1andG -C SFe xp r e s s i on w e r es i gn i f i c an t l yr edu c ed inI l 1 r 1 -d e f i c i en tm i c e .CXCL 1e xp r e s s ionw a sa lmo s ten t i r e l yd e i gn a l in g( F i g .5) ,wh i l eG -C SFe xp r e s s iont r endtob e in gd ep end en tonb o th p end en tonIL 1αs IL 1 αandA SC inanadd i t i v em ann e r( F i g .5) .As im i l a rt r end ,a sob s e r v edw i thCXCL 1 ,w a s s e enw i thIL 6andCCL 2 ,bu t i td idno tr e a chs i gn i f i c an c e( F i g .5) .Thu s ,b lo c k in gIL 1 αin m i c es i gn i f i c an t l yd e c r e a s edth eabund an c eo fCXCL 1 inth e lun g s ,wh i chco r r e l a t e sw i thth e l 1 r 1 -d e f i c i en tm i c e . d e c r e a s edn eu t roph i lr e c ru i tm en t inI Ab sen ceo fCCR2+mono c y te sre su l t s inde c rea sed IL -1α,CXCL1 ,and neu t roph i lre c ru i tmen t A sIL 1αw a sn e c e s s a r yfo rop t im a lCXCL 1e xp r e s s ionandn eu t roph i l in f i l t r a t ion in t oth e BALF(F i g .4C&5 ) ,w en e x tsou gh tto id en t i f ypo t en t i a lc e l lu l a rsou r c e so fIL 1 αinr e spon s e . fum i g a tu s. W i th inth e lun go fan a ï v e mou s es e v e r a lp o t en t i a l t opu lm on a r ych a l l en g ew i thA s ou r c e so fIL 1 αe x i s t in c lud in g :non -h em a topo i e t i cc e l l s( ep i th e l i a landendo th e l i a lc e l l s ) ,a l v e + o l a rm a c r oph a g e s inth ea i rw a ysp a c e s ,andCCR 2 mono c y t e sw i th inth e lun gp a r en ch ym a . PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 9 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge F igu re5 .IL -1αs igna l ingenhancesexp ress iono f leukocy terec ru i t ingchemok ines .C57BL /6 m i ce t rea tedw i the i the r i so t ypecon t ro lan t ibodyo r 7 CEA10con id iaanda t24hou r spo s t in fe c t ion ,m icewe re IL -1 αneu t ra l iz ingan t ibody ,I l1 r1 -de f i c ien tandP yca rd-de f i c ien tm i cewe re in fe c tedw i th5×10 eu than ized ,BALFco l lec ted ,and lung t i s suehomogen i zed .C y to k ineandchemo k ine le ve l s in the lunghomogena te swe re mea su redu s ing12 -p lex mu l t ip lex Lum inexassay ,s im i la r t rend swe reob se r ved inBALF .Da taa rerep re sen ta t i veo f two independen te xpe r imen t scon s i s t ingo f4–5 m i cepe rg roup .Ba r g raphsshow theg roup mean±oneSEM .S ta t i s t i ca l l ys ign i f i can td i f fe ren ce swe rede te rm inedu s ingaK ru s ka l -Wa l l i sone -wa yANOVAw i thDunn’ spos t tes t ( *p<0 .05 ,**p<0 .01 ) . d o i : 1 0 . 1 3 7 1 / j o u r n a l . p p a t . 1 0 0 4 6 2 5 . g 0 0 5 Du r in gpu lm on a r yM y c o b a c t e r iumtu b e r cu l o s i s in f e c t iontwod i s t in c tpopu l a t ion so fm y e l o id + c e l l sc o e xp r e s sIL 1 αandIL 1 β : in f l amm a to r y mono c y t e swh i cha r eCD 1 1b CD 1 1 c−L y 6 c+ + and m on o c y t i cd end r i t i cc e l l swh i cha r eCD 1 1b CD 1 1 c+[ 4 9 ] .Inr e spon s etopu lm on a r yA . + fum i g a tu s ch a l l en g e ,CCR 2 in f l amm a to r y mono c y t e sa r er ap id l yr e c ru i t edtoth e lun gand g i v er i s et om ono c y t e -d e r i v edd end r i t i cc e l l sth a tp l a ye s s en t i a lro l e s in inn a t ed e f en s ea g a in s t + in v a s i v ea sp e r g i l lo s i s[ 1 2 ] .In t e r e s t in g l y ,bo thCCR 2 in f l amm a to r y mono c y t e sand m on o c y t e d e r i v edd end r i t i cc e l l sshow in c r e a s edt r an s c r ip t iono fth eI l 1 ag en ea t4 8hpo s t A . fum i g a tu s + ch a l l en g e[ 1 2 ] ,bu twh e th e r lun g r e s id en tCCR 2 mono c y t e scou ldcon t r ibu t etoIL 1αp r odu c t i ona te a r l yt im e sa f t e r in f e c t ionw a sno te xp lo r ed . Thu s ,w ech a l l en g ede i th e rC 5 7BL / 6o rCCR 2 -d ep l e t e rm i c e[1 0 , 5 0 ] ,wh i chh adb e ent r e a t ed 7 on ed a yp r i o rw i th2 5 0n go fd iph th e r i ato x in ,w i th*5× 1 0 con id i ao fA . fum i g a tu s.T oc on + f i rmd ep l e t i ono fth eCCR 2 mono c y t e sw equ an t i f i edCCR 2+in f l amm a to r ym on o c y t e s( id en + + + − 1 1b L y 6CL y 6G) inth eBALFand lun gp a r en ch ym a8ha f t e rA . fum i g a tu s t i f i eda sCD 4 5CD + ch a l l en g eb yf lowc y tom e t r y .W efoundth a td iph th e r i ato x inh adnoe f f e c tonCCR 2 m on o + c y t e s inc on t r o lan im a l s ,wh i l eCCR 2 -d ep l e t e rm i c et r e a t edw i thDTh adnod e t e c t a b l eL y 6C in f l amm a t o r y mono c y t e s , inth eBALFo r lun gp a r en ch ym aa se xp e c t ed( F i g .6A)[ 1 2 ] .W e + c y t e sw e r ea b f oundth a tIL 1 αp ro t e in l e v e l sw e r es i gn i f i c an t l yd e c r e a s edwh enCCR 2 mono + s en t( F i g .6B)con s i s t en tw i thth e id e ath a t lun g r e s id en tCCR 2 in f l amm a to r ym on o c y t e sa r e imp o r t an tf o rp rodu c in gand /o r indu c in ge xp r e s s iono fth i sc y to k in e inth e lun ga te a r l yt im e s a f t e r in f e c t i on .S in c eb lo c k in gIL 1 αin m i c es i gn i f i c an t l yd e c r e a s edth ee xp r e s s i ono fCXCL 1 F i g .5) ,w en e x ta s k edwh e th e rCXCL 1p ro t e in l e v e l sw e r ed im in i sh ed inth e lun g inth e lun g s( p a r en ch ym ao fth eCCR 2 -d ep l e t e rm i c e .W efoundth a tCXCL 1p ro t e in l e v e l sw e r ea l s os i gn i f i + + c an t l yd e c r e a s ed inth eab s en c eo fCCR 2 mono c y t e s(F i g .6C) .Thu s ,CCR 2 mon o c y t e sa r e imp o r t an tr e gu l a to r so fth ee a r l ye xp r e s s iono fIL 1 αandCXCL 1 .Con s i s t en tw i thth e PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 10 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge F igu re6 . CCR2+monocy teregu la teea r ly IL -1αandCXCL1exp ress ion .C57BL /6o rCCR2 -dep le te rm ice we re t rea ted i .p .w i th250ngo fDT24hp r io r tocha l lengew i th5×107A f293con id ia .(A )Naï veC57BL /6o r CCR2 -dep le te rm i ceo rC57BL /6o rCCR2 -dep le te rm i cecha l lengede igh thou r sp r io rwe reeu than izedand theBALFand lung t i s sueco l le c ted fo r f lowc y tome t r i cana l y s i s toa s se s sdep le t iono f ta rge tce l lsbyDT .P lo ts + l l sandshowL y6 candL y6gs ta in ing ,wh i ch iden t i f y theCCR2 monocy tes a rega tedonCD45+CD11b+ce andneu t roph i l s ,re spe c t i ve l y .(B )IL -1 αand(C )CXCL1p ro te in le ve l s in the lungpa ren ch ymaa t8hpos t 7 cha l lengew i th5×10 con id iao fA .fum iga tu ss t ra inA f293we re mea su redu s ingEL ISAa s says .Ba rg raphs id iao fA .fum iga tu ss t ra in show theg roup mean s±oneSEM .(D )E igh thou r spo s t cha l lengew i th5×107con A f293 ,neu t roph i l s in theBALFwe reenume ra ted .Da taa rerep re sen ta t i ve(B -C )o rpoo led(D )f rom two independen te xpe r imen t scon s i s t ingo f4 m i cepe rg roup .Ea chs ymbo lrep re sen t san ind i v idua l mouseand the l inerep re sen t s theg roup mean .S ta t i s t i ca l l ys ign i f i can td i f fe ren ce swe rede te rm inedu s ingaone -way ANOVAw i thBon fe r ron i’ spo s t te s tcompa redC57BL /6 m i ce( *p<0 .05 ,**p<0 .01 ) . d o i : 1 0 . 1 3 7 1 / j o u r n a l . p p a t . 1 0 0 4 6 2 5 . g 0 0 6 imp o r t an c eo fth e s ef a c to r s inp romo t in ge a r l yn eu t roph i lr e c ru i tm en t(F i g . 2and4 ) ,d im in i sh edIL 1 αandCXCL 1 l e v e l s inCCR 2 -d ep l e t e rm i c eco r r e l a t edw i thd im in i sh edr e c ru i tm en t + o fn eu t r oph i l stoth ea i rw a y s8ha f t e rA . fum i g a tu sch a l l en g e( F i g .6D) .Thu s ,CCR 2 m on o c y t e sa r e imp o r t an tr e gu l a to r so fth ee a r l ye xp r e s s iono fIL 1 αandCXCL 1 ,wh i cha r er equ i r ed f o rop t im a lr e c ru i tm en to fn eu t roph i l sa te a r l yt im e sa f t e rA . fum i g a tu sch a l l en g e . CXCL1supp lemen ta t iono fI l1 r1 -de f i c ien tm i ceenhan ce sneu t roph i l re c ru i tmen tandre s i s tan ce topu lmona r yA spe rg i l lu sfum iga tu s cha l lenge A sb o thI l 1 r 1 -d e f i c i en tm i c eandan t i IL 1 αt r e a t ed m i c ed i sp l a y eds i gn i f i c an t l yd e c r e a s ed c e l lu l a r in f i l t r a t ion in toth eBALF(F i g .2Dand4C )th a tco r r e l a t edw i thd e c r e a s eda bund an c e o fCXCL 1(F i g .5) ,w en e x tsou gh ttot e s twh e th e r immuno th e r ap ywh i chenh an c e sn eu t r oph i l a c cumu l a t i on inth e lun g s ,su cha sCXCL 1supp l em en t a t ion ,cou ldenh an c econ t ro lo fA . g r ow th inth eI l 1 r 1 -d e f i c i en tm i c e .W ech a l l en g ede i th e rC 5 7BL / 6o rI l 1 r 1 -d e f i c i en t fum i g a tu s 7 m i c ew i th*5× 1 0 con id i ao fA . fum i g a tu s.Th r e ehou r sa f t e rch a l l en g em i c ew e r et r e a t ed i . t . w i the i th e rPB So r0 . 5μgCXCL 1 .A se xp e c t ed ,I l 1 r 1 -d e f i c i en tm i c ed i sp l a y edas i gn i f i c an t im p a i rm en t inc on t ro l l in gA . fum i g a tu sg e rm in a t iona t4 8hwh encomp a r edw i thC 5 7BL / 6m i c e F i g .7A -B) .P ro v i s iono fCXCL 1toI l 1 r 1 -d e f i c i en tm i c ecou ldp a r t i a l l yr e s cu ec on t r o lo fA . ( fum i g a tu s g e rm in a t ion inth e lun g s ,wh i l enoenh an c em en t incon t ro lo ffun g a lg r ow thw a so b s e r v ed inth eCXCL 1t r e a t edC 5 7BL / 6m i c e( F i g .7A -B) .Fu r th e rmo r e ,p ro v i s iono fCXCL 1 i . t . αt r e a t edC 5 7BL / 6m i c e incon t ro l l in gA . fum i g a tu s r e s cu edth e imp a i rm en to fan t i IL 1 PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 11 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge F igu re7 .T rea tmen to fI l1 r1 -de f ic ien tm icew i thCXCL1pa r t ia l ly inc reasesres is tancetoAspe rg i l lusfum iga tusin fec t ion . C57BL /6 m iceandI l1 r1 de f ic ien tm icewe recha l lenged i . t .w i th5×107CEA10con id ia .Th reehou r spo s t cha l lenge m i cewe reg i ven0 .5μgCXCL1 i . t .o rPBSa lone .Twen ty fou r hou rspos t in fec t ion ,m icewe reeu than i zed ,BALFco l le c ted ,and lung ssa ved fo rh i s to log i ca lana l y s i s .(A )Fo rma l in f i xed lung swe repa ra f f inembedded , sec t ionedands ta inedw i thH&E( top )o rGMS(bo t tom ) fo rana l y s i sb ym i c ro s cop y .Rep re sen ta t i ve lungse c t ion s f romI l1 r1 -de f i c ien tm i cecha l lengedw i th CEA10 fo r48hand t rea tedw i the i the rPBSo rCXCL1a reshownu s inge i the r the4×( le f t )o r20×( r igh t )ob je c t i ve s .(B )A .fum iga tu sge rm ina t ionra teswe re assesseda t48ho f in fec t ionb ym i c ro s cop i ca l l ycoun t ingbo th thenumbe ro fcon id iaandnumbe ro fge rm l ing s inGMS s ta inedse c t ion .Numbe ro fcon id ia andnumbe ro fge rm l ingswe recoun ted fo rea chGMS s ta inedse c t ion toquan t i f y thepe r cen tge rm ina t ion .(C )Ma c rophageandneu t roph i lrec ru i tmen t in I l1 r1 -de f ic ien tm ice24hpo s t cha l lenge in fe c tedw i thA .fum iga tu st rea tedw i thPBSo rCXCL1g i ven i . t .wa sde te rm inedv iac y to sp in s . (D )Bone ma r row neu t roph i ls f romC57BL /6andI l1 r1 -de f i c ien tm i cewe re in cuba tedw i thCEA10ge rm l ing sinv i t ro a ta10 :1ra t io inno rmo x ia fo r2h .TheXTTassaywasused (E )Lungdamageand(F )lea kagewe rea s se s sedb y mea su r ingLDHanda lbum in ,re spe c t i ve l y .Da ta isrep resen ta t ive tode te rm inepe rcen t funga ldamage . o fa t leas t two independen te xpe r imen t scon s i s t ingo f th ree to f i ve m i cepe rg roup ,e x cep t fo r thebone ma r rowneu t roph i lan t i -h ypha lXTTa ssaywh ich isa s ing leexpe r imen twh ichcon s i s tedo fpoo ledbone ma r rowneu t roph i l s f rom th ree m i cedone in t r ip l i ca te .Ea chs ymbo lrep re sen t san ind i v idua lmouseo r rep l ica teand the l inerep re sen t s theg roup mean .S ta t i s t i ca l l ys ign i f i can td i f fe ren ce swe rede te rm inedu s ingaone -wa yANOVAw i thBon fe r ron i ’ spos t tes t ( *p<0 .05 ,**p<0 .01 ,***p<0 .001 ,n s=no ts ign i f i can t ) . d o i : 1 0 . 1 3 7 1 / j o u r n a l . p p a t . 1 0 0 4 6 2 5 . g 0 0 7 in f e c t i on( S 5AF i g . ) .A se xp e c t ed ,tw en t y fou rhou r sa f t e rch a l l en g eth er e c ru i tm en to fn eu t r o ph i l s ,bu tn o tm a c roph a g e s ,toth eBALF inI l 1 r 1 -d e f i c i en tm i c ew a senh an c edb yth ep r o v i s i on o fCXCL 1(F i g .7C) .Add i t ion a l l y ,n eu t roph i lr e c ru i tm en ttoth eBALF inan t i IL 1 αt r e a t ed C 5 7BL / 6m i c ew a ss i gn i f i c an t l yenh an c ed(S 5BF i g . ) . Wh i l eCXCL 1p ro v i s ionenh an c edn eu l 1 r 1 -d e f i c i en tm i c e ,w ea l sosou gh ttot e s twh e th e rth e t r oph i la c cumu l a t ion inth ea i rw a y so fI an t i -h yph a la c t i v i t yo fn eu t roph i l sw a sa l t e r ed inth eab s en c eo fIL 1R Is i gn a l in gbu te x o g en ou s add i t i ono fCXCL 1 .H yph a ld am a g e indu c edb yn eu t roph i l s i so l a t edf romth eb on em a r r owo f r e sp e c t i v em ou s eg eno t yp e sw a sa s s e s s edu s in gth eXTTh yph a ld am a g ea s s a y[ 4 6 ] .C 5 7BL / 6 b on em a r r own eu t roph i l s indu c edrobu s th yph a ld am a g ewh enco cu l tu r edw i thA . fum i g a tu s, wh i chw a sn o tfu r th e renh an c edb yt r e a t edw i th5 0nMo fCXCL 1(F i g .7D) .In t e r e s t in g l y , I l 1 r 1 -d e f i c i en tbon em a r rown eu t roph i l s indu c eds i gn i f i c an t l y l e s sd am a g etoA . fum i g a tu sh y i g .7D) .Inc on t r a s tt oth e ph a eth anw a sob s e r v edw i thC 5 7BL / 6bon em a r rown eu t roph i l s(F t r e a tm en to fC 5 7BL / 6bon em a r rown eu t roph i l s ,t r e a tm en to fI l 1 r 1 -d e f i c i en tbon em a r r ow n eu t r oph i l sw i th5 0nMo fCXCL 1s i gn i f i c an t l yenh an c edth ean t i -h yph a la c t i v i t yo fth o s ec e l l s ( F i g .7D) . Wh enc e l ld e a thandendo th e l i a l / ep i th e l i a lc e l l l e a k a g ew e r ea s s e s s edinv i v o b y l a c t a t ed eh yd r o g en a s e(LDH )anda lbum in m e a su r em en t ,r e sp e c t i v e l y , inth eBALFb o th m a r k e r s i g .7E -F) .CXCL 1supp l em en t a t ionr edu c edb o th w e r e in c r e a s ed inth eab s en c eo fIL 1R I(F PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 12 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge m a r k e r s ,bu ta lbum in l e v e l sw e r e mo r ed r am a t i c a l l yr edu c edth anLDH l e v e l s( 7 1%v e r su s 3 2% ,r e sp e c t i v e l y )( F i g .7E -F) .Thu s ,p ro v i s iono fCXCL 1cou lds i gn i f i c an t l yenh an c e n eu t r oph i lr e c ru i tm en ttoth e lun g s inth eab s en c eo fIL 1αs i gn a l in gandenh an c edth einv i t r o an t i -h yph a la c t i v i t yo fI l 1 r 1 -d e f i c i en tbon em a r rown eu t roph i l s ,wh i chto g e th e ru l t im a t e l yr e su l t ed inap a r t i a lr ep a i ro fth eA . fum i g a tu scon t ro lm e ch an i sm s inth eI l 1 r 1 -d e f i c en t lun g s . D iscuss ion Inth i ss tud y ,w eun co v e rane s s en t i a lfun c t ionfo rIL 1R I inp r e v en t in gfun g a lp r o l i f e r a t i on andh o s td am a g e in mu r in e lun g s .W eh a v ed emon s t r a t edano v e ld i cho tom yfo rth eIL 1c y t o k in e s inr e gu l a t in gth e inn a t e immun er e spon s e indu c edb yA . fum i g a tu s.Sp e c i f i c a l l y ,IL 1 αi s r equ i r edf o r in i t i a t in gth eco r r e c t in f l amm a to r ys i gn a l sn e c e s s a r yfo rop t im a l l eu k o c y t er e c ru i t m en t ,wh i l eth e in f l amm a som eandIL 1βw a sn e c e s s a r yfo rop t im a lan t i fun g a la c t i v i t ya g a in s t fun g a lh yph a e .W eh a v ee lu c id a t edth a tIL 1 αp l a y sth edom in an tro l e ina c t i v a t in gIL 1R Is i g n a l in gwh i chr e su l t s inamp l i f i edCXCL 1e xp r e s s ion ,wh i chco r r e l a t edw i thop t im a l l eu k o c y t e + r e c ru i tm en tt oth er e sp i r a to r yt r a c t .CCR 2 mono c y t e sw e r e impo r t an tc e l l s inr e gu l a t in gth e e a r l yp r odu c t iono fIL 1 α,CXCL 1 ,andn eu t roph i lr e c ru i tm en t .T a k ento g e th e r ,ou rd a t a d em on s t r a t eth a ts i gn a l in gth rou ghIL 1R Ib ybo thIL 1αandIL 1 βw a sn e c e s s a r yf o rop t im a l c on t r o lo fA . fum i g a tu spu lmon a r ych a l l en g etop r e v en tIPAd e v e lopm en t . IL 1R Is i gn a l in gw a se s s en t i a l inr e s i s t in gpu lmon a r yA . fum i g a tu sch a l l en g e inou rs tud i e s , a sd em on s t r a t edb yI l 1 r 1 -d e f i c i en tm i c eb e in gun ab l etor e s i s tfun g a lg row thr e su l t in g in s i gn i f i c an tm o r t a l i t y intho s ean im a l s .Th i sf ind in g i scon s i s t en tw i thr e su l t sr ep o r t edb y l 1 r 1w a sn e ed edtop r e v en tth ed e v e l opm en to f P e a r lm anandco l l e a gu e swhoa l sofoundth a tI A . fum i g a tu sindu c edk e r a t i t i s[ 5 1 ] . Mo r eo v e r ,v and eV e e rdon kandco l l e a gu e sh a v er e c en t l y sh ownth a tapo l y s a c ch a r id efun g a lv i ru l en c ef a c to r ,g a l a c to s am ino g a l a c t an(GAG ) ,f r om A . fum i g a tu sindu c e sth ee xp r e s s iono fIL 1R a ,wh i chan t a gon i z e sIL 1s i gn a l in gr e su l t in g in enh an c edsu s c ep t ib i l i t ytoIPA[ 5 2 ] .G r e sn i g te ta ld emon s t r a t edth a tGAGp r e t r e a tm en to f BALB / cm i c er e su l t ed in mo r efun g a lg row tha s so c i a t edw i th imp a i r edn eu t roph i lr e c ru i tm en t , wh i chw a sc omp l e t e l yd ep end en tonIL 1R ae xp r e s s ion[5 2 ] .How e v e r ,th e imp o r t an c eo fGAG indu c t i ono fIL 1R adu r in ga l i v epu lmon a r y A . fum i g a tu sin f e c t ionr em a in sun kn own .GAG e xp r e s s i on m i gh ta c tu a l l yb er edu c eda tsp e c i f i c in f e c t ions i t e sdu r in ginv i v oA . fum i g a tu s ch a l l en g eb e c au s eh ypo x i a ,wh i cho c cu r sa f t e r A . fum i g a tu sch a l l en g e[ 4 7 ]h a sb e eno b s e r v edt o r edu c eGAGp rodu c t ion[ 4 6 ] .Ing en e r a l ,th et empo r a landsp a t i a ld yn am i c so ffun g a lc e l lw a l l PAMP sinv i v o du r in gana c t i v e in f e c t ion i sno tfu l l yund e r s toodand l i k e l ycomp l i c a t edb yth e h e t e r o g en e ou sn a tu r eo fth e lun gand in f e c t ions i t em i c ro en v i ronm en t s . D own s t r e amo fIL 1R Ith ep ro x im a ls i gn a l in gad ap t e rtop rop a g a t eIL 1s i gn a l in g i s l 1 r 1 -d e f i c i en tm i c e ,M a r randco l l e a gu e s[ 4 4 ]and M yD 8 8 .S im i l a rtoou rob s e r v a t ionw i th I H oh landc o l l e a gu e s( Jh in g r anA .e ta l , inp r e s s )h a v efoundth e M yd 8 8-d e f i c i en tm i c ea r e m o r esu s c ep t i b l etoA . fum i g a tu sch a l l en g e .Add i t ion a l l y , imp a i r edcon t ro lo fpu lm on a r y l 1 r 1 -d e f i c i en tandI l 1 a / I l 1 b h i s t op l a sm o s i sandd i s s em in a t edc and id i a s i sw a sob s e r v ed inI d ou b l yd e f i c i en tm i c e ,r e sp e c t i v e l y[4 1 , 4 5 ] . Wh i l eou rs tud i e sandth es tud i e s ju s td i s cu s s ed s t r on g l ysupp o r taro l efo rIL 1R Is i gn a l in g in l im i t in gIPA ,ando th e r in v a s i v efun g a l in f e c t i on s ,R om an iandco l l e a gu e sh a v eob s e r v edth a tI l 1 r 1 -d e f i c i en tm i c ew e r e mo r er e s i s t an tt o pu lm on a r yA . fum i g a tu sch a l l en g e[ 5 3 ] .Th ed i f f e r en c ew i thou rs tud y i spo t en t i a l l ydu et oth e A . fum i g a tu ss t r a ins tud i ed ,a sRom an iandco l l e a gu e sh a v eshownth a td i f f e r en tA . fum i g a tu s s t r a in sh a v ed i v e r s eab i l i t i e sto indu c ep a tho lo g yand immun er e spon s e s[ 5 4 ] .Imp o r t an t l y ,th e in f e c t i on m od e l ss tud i eda r es i gn i f i c an t l yd i f f e r en t ,w i thRom an iandco l l e a gu e su t i l i z in ga c y c l oph o sph am id e indu c ed immuno supp r e s s ion mod e lw i thA s p e r g i l lu scon id i ad e l i v e r edon 5 3 ] ,wh i l eou rs tud i e su s ed immuno comp e t en tm i c eanda 3c on s e cu t i v ed a y s in t r an a s a l l y[ PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 13 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge s in g l ed o s eo fA s p e r g i l lu scon id i ag i v en in t r a t r a ch e a l l y .Add i t ion a l l yB e l l o c ch ioe ta l .[ 5 3 ] ,r e p o r t edth a th i s t o l o g i c a lan a l y s e s inth eI l 1 r 1 -d e f i c i en tm i c er e v e a l ed“ num e r ou s fun g a le l em en t s inth er e l a t i v ea b s en c eo fs i gn so f in f l amm a to r yp a tho l o g y ”wh i ch i scon s i s t en tw i thth er e su l t s w er ep o r th e r e inou re xp e r im en t a lm od e l . Mu r in emo r t a l i t y in in f e c t i ou sd i s e a s em od e l sc anr e su l t f r omd i r e c tp a th o g enm ed i a t edd am a g eo r immunop a th o g en e s i s ,and i t i sun c l e a r , inth i sr e g a rd ,h owou rmod e l sd i f f e r . Wh a tapp e a r st ob ec l e a r ,how e v e r , i sth a t inth ea b s en c eo fIL 1R I s i gn a l in g ,A s p e r g i l lu sp r o l i f e r a t ion in c r e a s e sinv i v o .T a k ento g e th e r ,a l lth e s e f ind in g sd em on s t r a t eth a tth eIL 1s i gn a l in gp a thw a y i s l i k e l yc en t r a lfo rr e s i s t an c eto fun g a ld i s e a s e s ,bu tth e i r r o l edu r in g immuno supp r e s s i onandf r e qu en c yo ffun g a le xp o su r e /qu an t i t ym a yd i f f e r ,w a r r an t in gfu r th e re xp l o r a t i ono fth eIL 1c y to k in e f am i l y ine a chc l in i c a l l yr e l e v an tm od e lo fIPA . Infu r th e rsuppo r to fou rob s e r v a t ion ,th ep ro t e c t i v ero l eo fIL 1c y to k in e s inan t i fun g a l im mun i t yun c o v e r ed inou rs tud yu s in gth e mu r in e mod e lo fA . fum i g a tu sin f e c t i on i s l i k e l yt ob e op e r a t i on a l inhum an sa s ind i c a t edb yg en e t i c l in k a g es tud i e s .F i r s t , ind i v idu a l sw i thSNP s in th eIL 1g en ec lu s t e r ,wh i cha r ea s so c i a t edw i thd e c r e a s edIL 1d ep end en t in f l amm a t o r ye v en t s , w e r ea t in c r e a s edr i s kfo rth ed e v e lopm en to fIPA[2 5 , 2 6 ] .S e cond ,po l ymo rph i sm s inth e C IA S 1g en ep l a yac en t r a lro l er e gu l a t in g in f l amm a som ea c t i v i t yandIL 1 βp rodu c t i on ,wh i ch c ana l t e rth er i s ko fasub s e to fp a t i en t stod e v e lop in gr e cu r r en tvu l vo v a g in a lc and id i a s i s[ 5 5 ] . Th i rd ,m a c r oph a g e sf romp a t i en t sw i thch ron i cc a v i t a r ypu lmon a r ya sp e r g i l lo s i s(CCPA )h ad p r o l on g ede xp r e s s iono fI l 1 aandI l 1 ba f t e rA . fum i g a tu st r e a tm en twh encomp a r edt oh e a l th y c on t r o l sandSNP s inth eI l 1 bandI l 1 rnlo c ia r ea s so c i a t edw i thsu s c ep t ib i l i t ytod e v e l op in g CCPA[5 6 ] .Thu s ,t a r g e t in gth eIL 1c y to k in ep a thw a y s inhum an scou ldb e imp o r t an t in m an a g in gfun g a l in f e c t ion s . . fum i g a tu s[ 4 4 , 5 1 ] i tw a ssh own Inp r e v i ou sp ap e r se xp lo r in gth ero l eo fM yD 8 8du r in gA th a tfun g a lg r ow thw a sno tcon t ro l l ed ,bu tth em e ch an i sm imp a i r ed inth eab s en c eo fIL 1R I and M yD 8 8s i gn a l in gr em a in sanop enqu e s t ion .Inth i ss tud yandap a r a l l e ls tud yb yJh in g r an e ta l( inp r e s s ) i tw a sd emon s t r a t edth a tM yD 8 8andIL 1R Im ed i a t eds i gn a l sa r en e c e s s a r yf o r op t im a l l eu k o c y t er e c ru i tm en ta f t e rpu lmon a r yA . fum i g a tu sch a l l en g e ,wh i ch i sn e ed edf o r p r e v en t in gth ed e v e lopm en to fIPA .An a lo gou s l y , inth eA . fum i g a tu sk e r a t i t i sm od e lb o th M y d 8 8-andI l 1 r 1 -d e f i c i en tm i c ed emon s t r a t edr edu c edc e l lu l a r in f i l t r a t ee a r l ya f t e r in o cu l a t i on [ 5 1 ] .H ow e v e r ,wh yth e l a c ko fIL 1R Io rM yD 8 8s i gn a l in gr e su l t s ind e c r e a s edc e l lu l a r in f i l t r a t e sw a sanop enqu e s t ion .In t e r e s t in g l y ,w efoundad e c r e a s e inth ee xp r e s s iono fth ech em o k in eCXCL 1 inI l 1 r 1 -d e f i c i en tm i c e ,wh i cho th e r sh a v ea l soob s e r v ed inch a l l en g edM y d 8 8d e f i c i en tm i c e[4 4 ]( Jh in g r anA .e ta l , inp r e s s ) .CXCL 1 ,to g e th e rw i thCXCL 2andCXCL 5 ,a r e l i g and sf o rCXCR 2anda r ek e ych emo a t t r a c t an t sfo rr e c ru i tm en to fn eu t roph i l s .Adm in i s t r a t i ono fab l o c k in gan t i -CXCR 2an t ibod yo rg en e t i cab l a t iono fC x c r 2h a sb e ensh ownt oe x a c e r . fum i g a tu sch a l l en g e b a t em o r t a l i t yandd e l a yn eu t roph i lr e c ru i tm en tfo l low in gpu lmon a r yA , 2 4 ] .M [ 2 3 o r e o v e r ,t r an s i en to v e r e xp r e s s iono fCXCL 1 inCC 1 0 e xp r e s s in g lun gep i th e l i a l l t ed ins i gn i f i c an t l yenh an c ed l eu ko c y t ea c cumu l a t ionandr edu c edfun g a lbu rd en c e l l sr e su [ 2 2 ] .C o r r e sp ond in g l y ,wh enw et r e a t edI l 1 r 1 -d e f i c i en tm i c ew i thr e comb in an t mu r in eCXCL 1 w eo b s e r v eds i gn i f i c an t l yenh an c edn eu t roph i la c cumu l a t ion .Inadd i t ion ,I l 1 r 1 -d e f i c i en tb on e i t r o ,wh i chw a sr e s t o r edb y m a r r own eu t r oph i l sd i sp l a y edd e c r e a s edan t i -h yph a la c t i v i t yinv t r e a tm en tw i thCXCL 1 .Th e s ed a t ad emon s t r a t eth a tbo thIL 1R IandCXCL 1s i gn a l in g i sc r i t i c a l inn o ton l yenh an c in gn eu t roph i lr e c ru i tm en ttoth ea i rw a y s inth eI l 1 r 1 -d e f i c i en tm i c e ,bu t a l s o in indu c in gth eop t im a lan t i -h yph a ls t a t eo fth er e c ru i t edn eu t roph i l s . Wh i l eth em e ch a n i smb eh indCXCL 1m ed i a t edan t i -h yph a la c t i v i t y inou r mod e l i sun known ,n eu t r oph i l sf r om C x c l 1-d e f i c i en tm i c eh a v ean imp a i r edr e a c t i v eo x y g enr e spon s e inapo l ym i c ro b i a ls ep s i s m od e l[5 7 ] . Mo r eo v e r ,C x c l 1-d e f i c i en tn eu t roph i l ss t imu l a t edw i thK l e b s i e l l apn eum on i a eh ad p h o x p h o x r edu c ede xp r e s s iono fp 6 7 andp 4 7 andr edu c edp rodu c t iono fm y e lop e r o x id a s e ,n i t r i c o x id e ,andh yd ro g enp e ro x id e ,wh i chr e su l t s ind e c r e a s edk i l l in go fK l e b s i e l l apn eum on i a eb y PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 14 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge th en eu t r oph i l s[ 5 8 ] .F in a l l y ,IL 8h a sb e enshowntob e impo r t an tfo rp r im in gth ehum ann eu t r oph i l sr e a c t i v eo x y g enbu r s t[ 5 9 ] .Thu s ,ou rd a t asuppo r t sa mod e lwh e r eIL 1R Is i gn a l in g i s c r i t i c a lf o rop t im a ln eu t roph i lr e c ru i tm en tanda c t i v a t iono fth e i ran t i -h yph a la c t i v i t y inp a r t th r ou ghth er e gu l a t iono fCXCL 1abund an c e .Fu r th e rsuppo r tfo rth i scon c lu s ionc om e sf r om ar e c en tan a l y s i so fm i c ew i tha m y e lo idd e f i c i en c yo fth et r an s c r ip t ion a lr e gu l a t o rH IF 1 α.L o s s αr e su l t s ins e v e r esu s c ep t ib i l i t ytoth es am es t r a ino fA . fum i g a tu su t i l i z ed o fm y e l o idH IF 1 h e r e inp a r tth rou ghr edu c t ion inn eu t roph i lr e c ru i tm en t .Impo r t an t l y , lo s so fH IF 1αr e su l t ed ind e c r e a s edIL 1 αandCXCL 1 l e v e l sa f t e rA . fum i g a tu sch a l l en g es im i l a rtowh a tw eo b s e r v ed inou rs tud i e s[ 6 0 ] .In t e r e s t in g l y ,o th e r in f l amm a to r yp a thw a y sa r ea l sot empo r a l l yr e gu l a t in g n eu t r oph i lr e c ru i tm en ta f t e rA . fum i g a tu sch a l l en g e ,b e c au s eC a rd 9-d e f i c i en tm i c eh ada l a t e d e f e c t inn eu t roph i lr e c ru i tm en tth a tw a sa s so c i a t edw i tha mo r eg lob a ld im inu t i ono fth e in f l amm a t o r ym i l i eu[ 6 1 ] .Inadd i t iontoth ee a r l yd e f e c t inn eu t roph i lr e c ru i tm en tI l 1 r 1 -d e f i c i en t m i c ea l s oh add e c r e a s ed m a c roph a g er e c ru i tm en ttoth ea i rw a y sb y4 8hpo s t ino cu l a t i on .Th e r e a s onf o rth i s i sun knowna tth i st im e ,bu t i t i sknownth a tG -C SFd e f i c i en tm i c eh a v em on o c y t ed e f e c t sandou rc y to k in ean a l y s i sd emon s t r a t edth a tI l 1 r 1 -d e f i c i en tm i c eh ads i gn i f i c an t l y l ow e r l e v e lo fG -C SF inth ea i rw a y s[ 6 2 ] .Thu s ,fu r th e rs tud i e se xp lo r in gth er e gu l a t i ono f mu l t ip l en eu t r oph i lch emo t a c t i cp a thw a y s ,su cha sCXCR 2 ,CCR 1 ,IL 1 7 , l eu k o t r i en e ,and c omp l em en t -d ep end en tp a thw a y s ,andmon o c y t ech em o t a c t i cp a thw a y s ,su cha sG -C SFR —and CCR 2 -d ep end en tp a thw a y s ,a r en e ed eda f t e rpu lmon a r y fun g a lch a l l en g e . IL 1R I ,t o g e th e rw i thIL 1RA cP , i sth eh i gh a f f in i t yr e c ep to rfo rbo thIL 1 αandIL 1 β[ 2 7 ] . Th em a tu r a t i onands e c r e t iono fIL 1αandIL 1 βi sknowntob er e gu l a t edb yd i s t in c tp r o t e o l y t i cp a thw a y sd ep end en tonc a lp a inandc a sp a s e 1 ,r e sp e c t i v e l y[ 2 7 , 6 3 ] .Num e r ou sfun g a l p a th o g en sh a v eb e enshowntoa c t i v a t eth e in f l amm a som er e su l t in g inth ep rodu c t i ono fIL 1β [ 3 0 , 3 1 , 3 2 , 3 3 , 3 4 , 3 5 , 3 6 , 3 7 ] .Impo r t an t l yfo rou rs tud i e s ,o th e r sh a v ed emon s t r a t edth a tth e NLRP 3 -A SC -C a sp a s e 1 in f l amm a som ecou ldb ea c t i v a t edb yA . fum i g a tu s[ 3 1 ] ,bu tth einv i v o r e l e v an c eo fth a tf ind in gw a sun known .Con t ro lo fC .a l b i c an sin f e c t ion ,wh i cha l s oa c t i v a t ed 4 1 ] . th eNLRP 3 -A SC in f l amm a som e ,w a sh i gh l yd ep end en tonNLRP 3andIL 1 β[ 3 0 , 3 6 , 3 7 , Insh rcu r r en tr e su l t s ind i c a t eth a tth e in f l amm a som eon l yp l a y sa m od e s tr o l e a rpc on t r a s t ,ou inth ec on t r o lo fpu lmon a r y A . fum i g a tu sg row th .Inou re xp e r im en t s ,n eu t roph i lr e c ru i tm en t in m i c e l a c k in gth e in f l amm a som ew a scomp l e t e l yno rm a l ,wh i ch i s incon t r a s tt o C .a l b i c an s in f e c t i onwh e r em i c ed e f i c i en t inIL 1 βd i sp l a y edas i gn i f i c an tr edu c t ion inn eu t r oph i lr e c ru i tm en t[ 4 1 ] .Fu r th e rmo r e ,an t ibod yb lo c k ad eo fIL 1 βdu r in gpu lmon a r yH i s t o p l a sm a c a p su l a tumin f e c t ionr e su l t ed ind e c r e a s edsu r v i v a la s so c i a t edw i thd e c r e a s edr e c ru i tm en to f + G r 1+c e l l se a r l yandCD 4 c e l l s l a t etoth e lun g so fch a l l en g edan im a l s[ 4 5 ] .Thu s ,w ew e r e su rp r i s edt oo b s e r v esu chadom in an tro l efo rIL 1 αinr e gu l a t in ge a r l y l eu ko c y t er e c ru i tm en t f o l l ow in gpu lmon a r yA . fum i g a tu sch a l l en g e ,wh i chco r r e l a t e sw i th i t sr e gu l a t iono fth ech em o k in eCXCL 1 .Insuppo r to fth i sf ind in g ,du r in gs t e r i l e in f l amm a t ionth e impo r t an c eo fIL 1 αin r e gu l a t in gn eu t roph i lr e c ru i tm en t i sunqu e s t ion ab l e[ 3 8 , 3 9 ] .I th a sa l sob e end em on s t r a t ed αp l a y sac r i t i c a lro l edu r in gmu r in eL .pn eum o ph i l ain f e c t ion , in i t i a t in gn eu t r oph i lr e th a tIL 1 c ru i tm en tandth e in f l amm a to r yr e spon s ee a r l ya f t e r in f e c t ion[ 4 0 ] .O th e r sh a v ep r e v i ou s l y sh ownth a tIL 1R Iand M yD 8 8e xp r e s s ionw i th inar ad io r e s i s t an tpopu l a t iono fc e l l sw a s e s s en t i a lf o rop t im a le xp r e s s iono fCXCL 1andCXCL 2du r in gL .pn eum o ph i l ain f e c t i on[ 6 4 ] . In t e r e s t in g l y , inth e i rp a r a l l e ls tud yHoh landco l l e a gu e sfoundth a tIL 1R I /M yD 8 8s i gn a l in g in ar ad i o r e s i s t an tc e l lpopu l a t ionw a sn e c e s s a r yfo rop t im a lCXCL 1e xp r e s s ionandn eu t r oph i l r e c ru i tm en te a r l ya f t e rpu lmon a r yA . fum i g a tu sch a l l en g e( Jh in g r anA .e ta l , inp r e s s ) . B e c au s eo fth ee a r l y impo r t an c eo fIL 1c y to k in e s inr e gu l a t in gth epu lmon a r yan t i fun g a l immun er e sp on s e ,non -h em a topo i e t i cc e l l s( ep i th e l i a lo rendo th e l i a lc e l l s )o r lun g r e s id en t 1 βa f t e rA . fum i g a tu sch a l l en g e . m y e l o idc e l l sc ou ldr ep r e s en tpo t en t i a lsou r c e so fIL 1αandIL Du r in gpu lm on a r yM y c o b a c t e r iumtu b e r cu l o s i s in f e c t iontwod i s t in c tpopu l a t ion so fm y e l o id PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 15 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge + c e l l sc o e xp r e s sIL 1 αandIL 1 β : in f l amm a to r y mono c y t e swh i cha r eCD 1 1b CD 1 1 c−L y 6 c+ + + and m on o c y t i cd end r i t i cc e l l swh i cha r eCD 1 1b CD 1 1 c[ 4 9 ] .A f t e rpu lmon a r yA . fum i g a tu s ch a l l en g eb o th in f l amm a to r y mono c y t e sand mono c y t i cd end r i t i cc e l l sa r efound inth e lun g p a r en ch ym aandbo thshow in c r e a s edt r an s c r ip t iono fth eI l 1 ag en e[ 1 2 ] .H e r eou rd a t a + d em on s t r a t e sth a tCCR 2 mono c y t e sa r ea t l e a s ton eo fth e impo r t an tc e l lt yp e sr e gu l a t in gth e e a r l ye xp r e s s i ono fIL 1 αandCXCL 1 ,a sw e l la sn eu t roph i lr e c ru i tm en ta t8hp i .H ow e v e r , in + th ea b s en c eo fCCR 2 mono c y t e sth e r e i ss t i l las i gn i f i c an tamoun to fIL 1αandCXCL 1p r o du c ed inth e lun g sa f t e rA . fum i g a tu sch a l l en g e ,thu sth e r ea r e l i k e l y mu l t ip l esou r c e so fIL 1 α th a tc anr e gu l a t ee a r l ypu lmon a r yn eu t roph i la c cumu l a t ion . Mo r eo v e r ,b y4 8ha f t e r in f e c t i on CXCL 1 l e v e l sandn eu t roph i lr e c ru i tm en ttoth e lun g i sun a f f e c t ed inCCR 2 -d ep l e t e rm i c e[1 2 ] , thu ssu g g e s t in gth a td i s t in c tm e ch an i sm so fn eu t roph i lr e c ru i tm en ta r eop e r a t i on a la tv a r i ou s t im e sa f t e r in f e c t ion .Th i s i ssuppo r t edb yob s e r v a t ionth a tM yd 8 8-d e f i c i en tandC a r d 9-d e f i c i en tm i c eh a v ee a r l yo r l a t ed e f e c t s inn eu t roph i lr e c ru i tm en t ,r e sp e c t i v e l y( Jh in g r anA .e ta l , inp r e s sand[ 6 1 ] ) . Inou re xp e r im en t sth e in f l amm a som eandIL 1 βapp e a rtor e gu l a t eth ean t i fun g a la c t i v i t y o fm a c r oph a g e sa g a in s th yph a e ,e sp e c i a l l yund e rh ypo x i ccond i t ion s .Th i senh an c em en to f an t i fun g a la c t i v i t y inh ypo x i cm i c ro en v i ronm en t s i sph y s io lo g i c a l l yandc l in i c a l l y imp o r t an t 7 ] ,wh i ch i sc o in c id en t b e c au s eh yp o x i ac anb eg en e r a t edw i th inth e lun g so fm i c ew i thIPA[4 w i th in f l amm a to r y mono c y t ea r r i v a ltoth e lun g s[1 2 ] .Und e r s t and in ghowh yp o x i ac anen h an c eth ean t i fun g a la c t i v i t yo fm a c roph a g e inan in f l amm a som eandIL 1βd ep end en tm an n e rw i l lb e impo r t an t inund e r s t and in ghow m a c roph a g e s l im i tfun g a lg row th .In t e r e s t in g l y ,a r e c en tp ap e rf romTo r r e se ta ld emon s t r a t edth a ta c ido s i s ,wh i chc anb ed r i v enb yh yp o x i a ,r e su l t ed in in c r e a s edIL 1 βp rodu c t ion inr e spon s etoP .a e ru g in o s ach a l l en g e[ 6 5 ] .P e rh ap s s om ewh a tsu rp r i s in g l y , inth eab s en c eo fM yD 8 8an t i fun g a la c t i v i t ya g a in s tA . fum i g a tu sc o n id i ar em a in s in t a c t( Jh in g r anA .e ta l , inp r e s s ) .I th a sb e enshown ino th e rfun g a lp a th o g en s th a tIL 1 βt r e a tm en to fhum anp e r iph e r a lb lood l eu ko c y t e senh an c e sth e i ran t i fun g a la c t i v i t y a g a in s tP a r a c o c c id i od i e sb r a s i l i en s i s[ 6 6 , 6 7 ] .Add i t ion a l l y ,I l 1 r 1 -andN l r p 3-d e f i c i en tm a c r o .b r a s i l i en s i s[ 3 4 ] .Incon t r a s t ,du r in gd i s s em ph a g e sh a v e imp a i r edan t i fun g a la c t i v i t ya g a in s tP in a t edc and id i a s i s I l 1 a -d e f i c i en c yw a sa s so c i a t edw i thd e c r e a s edan t i fun g a la c t i v i t yo f l eu k o c y t e s[ 4 1 ] .Thu s ,s tud i e sd e s i gn edtound e r s t andth ed i f f e r en t i a ld ep end en c i e so fth eIL 1 c y t o k in e s inr e gu l a t in g l eu ko c y t er e c ru i tm en tandan t i fun g a la c t i v i t ydu r in gar an g eo ffun g a l d i s e a s e sand mo rpho lo g i c a lfo rm sa r en e ed ed . Inadd i t i ontound e r s t and in gth ec e l lu l a rsou r c eo fIL 1 αandIL 1 β ,und e r s t and in gth e in f l amm a t o r yp a thw a y s l e ad in gtoe xp r e s s iono fIL 1 αandIL 1 βa r ee s s en t i a ltoou rund e r s t and in go fr e s i s t an c etoIPA .Inth eab s en c eo fd e c t in 1s i gn a l in gth e r e i sd e c r e a s ede xp r e s s i ono f b o thIL 1αandIL 1 β[ 6 8 , 6 9 ] .Th e lo s so fH IF 1 αinth eL y sM e xp r e s s in gc e l l sa l s or e su l t ed in d e c r e a s edIL 1αl e v e i g a tu s ch a l l en g e[ 6 0 ] ,wh i chc anb er e gu l a t edb yd e c t in 1 .fum l s a f t e rA a g on i s t ssu cha sβ g lu c an[ 7 0 ] .Pu lmon a r yA . fum i g a tu sin f e c t ionr e su l t s ins i gn i f i c an tt i s su e d am a g eandc e l ld e a th ,bu tth ee x a c tt yp eo fc e l ld e a th i sno tknown . Mo r eo v e r ,th eph en o t yp e o fc e l ld e a thw i l lb esh ap edb yth eh ypo x i cm i c ro en v i ronm en tfounddu r in gIPA .Th et yp eo f c e l lu l a rd e a tho c cu r r in ginv i v o du r in gA . fum i g a tu sw i l lh a v e impo r t an t immuno l o g i c a l im p a c t ssh ap in gth ee a r l yIL 1αandIL 1 βr e spon s eb e c au s en e c ro t i cc e l ld e a thf a v o r sIL 1 αr e l e a s ewh i l ep y rop to s i sf a vo r sIL 1 βr e l e a s e[ 7 1 ] .In t e r e s t in g l y ,C .a l b i c an smu t an t sw i thd e f e c t s in indu c in gp y rop to s i sa l sod emon s t r a t edd e f e c t s in indu c in gIL 1 βs e c r e t ion ,bu tIL 1 αr e l e a s e w a sn o te x am in ed[7 2 ] .Add i t ion a l l y ,und e r s t and in ghowd e f i c i en c i e s inPRRs i gn a l in ga l t e r s th eo v e r a l l in f l amm a to r yr e spon s ew i l lb ec ru c i a la sp a t i en t sw i thSNP s inPRR sa r ekn ownt o h a v ee l e v a t edr i s k sfo rd e v e lop in gIPA[7 3 ] .Ou rd a t ad emon s t r a t eth a t inth eP y c a r d-d e f i c i en t m i c eth e r ea r ee l e v a t ed l e v e l so fTNFα,CCL 3 ,andCCL 4 .On ee xp l an a t ionfo ro b s e r v in ge l e v a t ed l e v e l so fTNF α,CCL 3 ,andCCL 4cou ldb eth er an g eo rd e g r e eth a tPRR sa r eb e in gen g a g ed PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 16 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge inth e P y c a r d-d e f i c i en tm i c eand /o rt empo r a landsp a t i a ld yn am i c so ffun g a lc e l lw a l lPAMP en g a g em en tw i thPRR sinv i v o th a ta r eno tfu l l yund e r s toodandfu r th e rcomp l i c a t edb yaPRR kn ownt ob een g a g eddu r in g in f e c t ionnowb e in gab s en t . I t i sw e l ld e f in edth a tp ro lon g edco r t i co s t e ro idt r e a tm en t in c r e a s e ssu s c ep t ib i l i t yo fh o s t st o IPA[ 7 4 ] .In t e r e s t in g l y ,d e x am e th a son e indu c e sth ee xp r e s s ionandr e l e a s eo fIL 1R I I[ 7 5 ] . αp r o t e in inth e IL 1R I I i skn ownto l im i tth ea c t i v i t yo fIL 1c y to k in e sand /o rs equ e s t e rIL 1 c y t o s o l ,p r e v en t in gth ec l e a v a g eo fIL 1 αb yc a lp a in[6 3 ] .D e x am e th a son eh a sa l s ob e ensh own t o imp a i rIL 1 αandIL 1 βs e c r e t ionf romhum an m a s tc e l l s inr e spon s etoP s eud om on a s a e ru g in o s as t imu l a t ion[ 7 6 ] . Mo r eo v e r ,d e x am e th a son et r e a tm en to fb ron cho a l v e o l a rm a c r o ph a g e sp r i o rt ot r e a tm en tw i thA . fum i g a tu scon id i as i gn i f i c an t l y imp a i r edth e i rr e l e a s eo f IL 1 α[ 7 7 , 7 8 ] .B e c au s ew eh a v eun co v e r edsu chap rom in en tro l efo rIL 1 αinc on t r o l l in g . fum i g a tu sch a l l en g e ,fu tu r es tud i e se xp lo r in gth ec l e a v a g es t a tu so fIL 1 αande x pu lm on a r yA p r e s s i ono fIL 1R I I inc l in i c a l l yr e l e v an t mod e l sa r ec r i t i c a l . F in a l l y ,th e impo r t an c eo fapp rop r i a t ea c t i v a t iono f l eu ko c y t e s inth econ t ro lo fA . fum i g a tu s i sh i gh l i gh t edb yp a t i en t sw i thch ron i cg r anu lom a tou sd i s e a s eb e in gh i gh l ysu s c ep t i b l et o A . fum i g a tu s [ 1 5 , 1 6 , 1 7 ] .In t e r e s t in g l y ,CGDp a t i en t so rm i c ea r et yp i c a l l y inah yp e r in f l amm a t o r y s t a t e ,wh i ch i s l in k edto in f l amm a som ea c t i v i t yandIL 1 βe xp r e s s ion[ 7 9 , 8 0 ] .Fu r th e r ,b l o c k ad e o fIL 1c y t o k in e s inp 4 7phox-d e f i c i en tm i c eth rou ght r e a tm en tw i thh IL 1 r ar e su l t s in imp r o v ed c on t r o lo fA . fum i g a tu s[ 7 9 ] .To g e th e r ,th e s es tud i e sd emon s t r a t eth a tfu r th e re xp l o r a t i on o fth ep o s i t i v eandn e g a t i v er e gu l a to r so fIL 1s i gn a l in gdu r in g in v a s i v efun g a l in f e c t i on s i s n e ed ed .M o r e o v e r , i t i sc r i t i c a lth a tw econ t inu etoe xp lo r eth er e gu l a t iono fth e in f l amm a t o r y r e sp on s e indu c ed ine a cho fth ed i f f e r en tsubpopu l a t ion so fho s t ssu s c ep t ib l etod e v e l op in g in v a s i v efun g a l in f e c t ion s ino rd e r tod e v e lopp a t i en tsp e c i f i cno v e l immuno th e r ap eu t i capp r o a ch e s th a tc ou l dc omp l em en tt r e a tm en tw i than t i fun g a la g en t s . Ma te r ia lsand Me thods M i ce C 5 7BL / 6 Jm i c ew e r eb r ed in -hou s e .P y c a rd(A SC ) -d e f i c i en tandM yd 8 8-d e f i c i en tm i c ew e r e o r i g in a l l yp r o v id edb yD r .V i sh i v aD i x i t(G en en t e ch )andD r .M a r kJu t i l a(Mon t an aS t a t eUn i v e r s i t y ) ,r e sp e c t i v e l y .I l 1 r 1 -d e f i c i en t( S to c k# 0 0 3 2 4 5 )andC 5 7BL / 6( S to c k# 0 0 0 6 6 4 )m i c ew e r e o r i g in a l l ypu r ch a s edf romJ a c k sonL abo r a to r i e s . Mou s es t r a in sw e r eth enb r ed in -h ou s e .Th e CCR 2 -d ep l e t e r(CCR 2 -DTR )s t r a inw a sg en e r a t edonth eC 5 7BL / 6b a c k g rounda sp r e v i ou s l y + d e s c r i b ed[1 0 , 5 0 ] .Con t ro lan im a l sfo rCCR 2 mono c y t ed ep l e t ione xp e r im en t sw e r es e x—and a g e -m a t ch ed ,non t r an s g en i c l i t t e rm a t e s .A l lm i c ew e r e8 –1 0w e e k so fa g ea tth et im eo f in f e c t i on .A l lan im a le xp e r im en t sw e r eapp ro v edb yth e Mon t an aS t a t eUn i v e r s i t yo rRu t g e r sUn i v e r s i t yIn s t i tu t ion a lAn im a lC a r eandU s eComm i t t e e . P repa ra t iono fA spe rg i l lu sfum iga tu scon id ia A . fum i g a tu ss t r a inCEA 1 0o rA f 2 9 3w a sg rownong lu co s em in im a lm ed i a(GMM )a g a rp l a t e s f o r3d a y so rS abou r audd e x t ro s ea g a r( SDA )fo r7 –1 0d a y sa t3 7 °C ,r e sp e c t i v e l y .C on id i aw e r e h a r v e s t edb yadd in g0 . 0 1%Tw e en8 0top l a t e sandg en t l ys c r ap in gcon id i af romth ep l a t e s u s in gac e l ls c r ap e r .Con id i aw e r eth enf i l t e r edth rou ghs t e r i l eM i r a c lo th ,w e r ew a sh edandr e su sp end ed inpho sph a t ebu f f e r eds a l in e(PB S ) ,andcoun t edonah em a c y tom e t e r . A spe rg i l lu sfum iga tu scha l lengepu lmona r y mode l M i c ew e r ech a l l en g edw i th A . fum i g a tu scon id i ab yth e i . t .rou t e .M i c ew e r ean e s th e t i z edw i th 2 . 5%2 , 2 , 2 t r i b romo e th ano lo raK e t am in e /X y l a z in eso lu t iong i v en i .p . ;sub s equ en t l y ,m i c e PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 17 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge 7 w e r ech a l l en g ed i . t .w i th*5×1 0 A . fum i g a tu scon id i a inavo lum eo f1 0 0μl .A tth e ind i c a t ed t im ea f t e rA . fum i g a tu sch a l l en g e ,m i c ew e r eeu th an i z edu s in ga l e th a lo v e rdo s eo fp en t o b a r b i t a l .B r on ch o a l v eo l a r l a v a g ef lu id(BALF )w a sco l l e c t edb yw a sh in gth e lun g sw i th2m lo fPB S M EDTA .BALFw a sc l a r i f i edb yc en t r i fu g a t ionands to r eda t−2 0 °Cun t i l c on t a in in g0 . 0 5 an a l y s i s .BALc e l l sw e r er e su sp end ed in2 0 0μlo fPB Sandto t a lBALc e l l sw e r ed e t e rm in edb y h em a c y t om e t e rcoun t .BALc e l l sw e r esub s equ en t l yspunon tog l a s ss l id e su s in gaC y to sp in 4 c y t o c en t r i fu g e(Th e rmoS c i en t i f i c )ands t a in edw i thD i f f -Qu i ks t a ins e t( S i em en s )f o rd i f f e r en t i a lc oun t in g .Fo rh i s to lo g i c a lan a l y s i s lun g sw e r ef i l l edw i thands to r ed in1 0%bu f f e r ed f o rm a l inph o sph a t efo ra t l e a s t2 4hou r s .Lun g sw e r eth enemb edd ed inp a r a f f inands e c t i on ed in t o5 -m i c r ons e c t ion s .S e c t ion sw e r es t a in edw i thH&EandGM Su s in gs t and a rdh i s t o l o g i c a l t e chn iqu e st oa s s e s s lun g in f l amm a to r y in f i l t r a t e sandfun g a lg e rm in a t ion ,r e sp e c t i v e l y .F o rc y t o k in ean a l y s i s lun g sw e r ehomo g en i z ed in2 m lo fPB S .A f t e rc l a r i f i c a t ion , lun gh om o g en a t e s w e r es t o r eda t−2 0 °Cun t i lan a l y s i s . Neu t ra l i z ingan t ibod ie sandchemo k inere con s t i tu t ion F o rIL 1αn eu t r a l i z a t ions tud i e s ,no rm a lgo a tI gGcon t ro landan t i -m IL 1αn eu t r a l i z in gan t i b od yw e r epu r ch a s edf romR&Ds y s t em s .I gGcon t ro lo ran t i -m IL 1 αn eu t r a l i z in gan t i b od y w e r eadm in i s t e r ed i .p .a t4 0μgp e r mou s e .Adm in i s t r a t iono fn eu t r a l i z in gan t ib od yw a sg i v en e v e r yo th e rd a y ,b e g inn in gth ed a yp r io rtoA . fum i g a tu sch a l l en g e .Fo rCXCL 1r e c on s t i tu t i on s tud i e s ,r e c omb in an t mu r in eCXCL 1w a spu r ch a s edf romP ep roT e ch .CXCL 1w a sadm in i s t e r ed i . t .a t0 . 1 –0 . 5μgp e r mou s eandw a sg i v en3hou r sa f t e rA . fum i g a tu sch a l l en g e .F o rth e h IL 1 r as tud i e s ,r e comb in an th IL 1 r aandth eapp rop r i a t ep l a c ebo(Am g en )w e r ek ind l yp r o v id edb yD r .Ch a r l e sA .D in a r e l lo .Th eh IL 1 r aandp l a c ebow e r eadm in i s t e r ed i .p .a t2 0 0m gp e r 4 ,0 ,and+ 2 4hr e l a t i v etoA . fum i g a tu sch a l l en g e . m ou s eg i v ena t−2 CCR2+ce l ldep le t ions t ra teg y F o rd ep l e t i on so fCCR 2+c e l l s ,CCR 2 -DTR m i c eandcon t ro l l i t t e rm a t e sr e c e i v ed2 5 0n go f d iph th e r i at o x in i .p .on ed a yp r io rto in f e c t ion .D iph th e r i ato x inw a spu r ch a s edf r omL i s tB i o l o g i c a lL a b o r a to r i e s(C ampb e l l ,CA )andr e con s t i tu t eda t1 m g /m l inPB S .A l iqu o t sw e r es t o r ed a t−8 0 °C .Th esp e c i f i c i t yande f f i c i en c yo fd ep l e t ion inth e lun gw a scon f i rm edb y f l owc y t om e t r y . Quan t i f i ca t iono f lungdamageand lea kage T oa s s e s s lun gd am a g e ,b ron cho a l v eo l a r l a v a g ef lu idw a san a l y z edb ym e a su r in g l a c t a t ed eh y d r o g en a s e l e v e l su s in gaC y toTo x9 6C y to to x i c i t yA s s a y(P rom e g a )fo l low in gth em anu f a c tu r e r ’ s in s t ru c t i on s .Toa s s e s sv a s cu l a r /pu lmon a r y l e a k a g e ,b ron cho a l v eo l a r l a v a g ef lu idw a s an a l y z edu s in ganA lbum inBCGR e a g en tS e t(E a g l eD i a gno s t i c s ) .As t and a rdcu r v ew a sm ad e fs amp l eo rs t and a rdw a st r an s f e r r edt oa b yd i lu t in gth ec a l ib r a to r inPB S .Th en1 0 0μlo 9 6w e l lf l a t b o t tom edp l a t e ,m i x edw i th1 0 0μlo fBCGr e a g en t , l e ts i ta tRTfo r5 m inandth en r e adonap l a t er e ad e ra t6 3 0nm . Lungce l l i so la t ionand f lowc y tome t r i cana l y s i s A f t e rc o l l e c t i ono fth eBALf lu id , lun gs amp l e sw e r em in c ed inRPM Icon t a in in g1 0 0un i t s /m l o fc o l l a g en a s e(G ib co )a t3 7 °Cfo r6 0m inu t e s ,fo l low edb yd i s rup t ionth rou gha4 0 -μmf i l t e r . A f t e rwh i ch ,r edb loodc e l l sw e r e l y s edu s in gaT r i sammon iumch lo r id eso lu t ion .S t a in in g 7 0c o f*1 e l l sw a sp e r fo rm ed in2 0 0μlo fPB Scon t a in in g2%bo v in es e rumand2mMEDTA . F o ran a l y s i so f l eu ko c y t e s ,an t ibod ys t a in in gw a sbo thcondu c t eda t4 °Cfo r3 0m inu t e s . PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 18 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge Ph en o t yp i can a l y s i so f l eu ko c y t e sw a scondu c t edu s in gap an e lo fc e l lsu r f a c em a r k e r s :CD 1 1 b , CD 1 1 c ,L y 6 g ,L y 6 c ,7 / 4 ,CD 1 9 ,andI -A / I -E ,a sp r e v iou s l yd e s c r ib ed[1 0 ] .A l lan t i b od i e su s ed f o ran a l y s i sw e r epu r ch a s edf romB io l e g end ,BDB io s c i en c e s ,eB io s c i en c eo rNo vu sB i o l o g i c a l s . A f t e rs t a in in g ,c e l l sw e r ew a sh edandf i x edw i th1%p a r a fo rm a ld eh yd e inPB S .F lu o r e s c en t in t en s i t i e sw e r em e a su r edu s in ganL SR(BDB io s c i en c e s )andd a t aw e r ean a l y z edu s in gF low J o s o f tw a r e(T r e eS t a r ) . A s sa y fo rc y to k ine ,chemo k ine ,andso lub lere cep to rse c re t ion B r on ch o a l v eo l a r l a v a g ef lu idand lun ghomo g en a t e sf romC 5 7BL / 6m i c ech a l l en g edw i thA . fum i g a tu s f o r6 ,1 2 ,2 4 ,and4 8hw e r e in i t i a l l yan a l y z edfo rc y to k in e sandch em o k in e su s in g P r o c a r t aP l e x Mou s eC y to k in e&Ch emo k in e3 6 -p l e x(A f f ym e t r i x eB io s c i en c e ) .IL 1R a l e v e l s w e r ed e t e rm in edb yEL I SA(R&DS y s t em s ) .P l a t e sw e r er e adu s in gaB ioP l e x2 0 0(B i o -R ad )o r aSp e c t r aM a xP a r ad i gmp l a t er e ad e r(Mo l e cu l a rD e v i c e s ) . G row tho fbone ma r row -de r i ved ma c rophage s(BMDM ) F emu r sandt i b i a sf rom8–1 0w e e ko ld m i c ew e r eob t a in edandc en t r i fu g edtoc o l l e c tb on e m a r r ow .C e l l sw e r er e su sp end ed in m ed i acon t a in in gRPM I1 6 4 0 ,2 mML g lu t am i ca c id , 5 0m g / lg en t am y c in ,1 0 0U /m lp en i c i l l in / s t r ep tom y c in ,3 0%L 9 2 9c e l lsup e rn a t an t ,2 0%FB S and0 . 0 0 0 4%2 -ME .Ond a y3f r e sh m ed iumw a sadd edtoth ecu l tu r e s .C e l l sw e r e in cu b a t ed f o rat o t a lo f6d a y sa t3 7 °Cand5%CO . 2 I so la t iono fbone ma r rowneu t roph i l s B on em a r r own eu t roph i l sw e r e i so l a t edf romf emu r sandt ib i a sf rom8–1 2w e e ko ldC 5 7BL / 6 andI l 1 r 1 -d e f i c i en tm i c ea sp r e v iou s l yd e s c r ib ed[ 6 0 ] .B r i e f l y ,s in g l ec e l lsu sp en s i on so fb on e m a r r ow inHB S Scon t a in in g0 . 1%FB Sand1%g lu co s ew e r er e su sp end ed in3 m lo f4 5%P e r c o l l (GEH e a l th c a r e ) .Ad i s con t inuou sP e r co l lg r ad i en tw a ss e t -upcon s i s t in go f( topt ob o t t om ) 3m l4 5% ,2m l5 0% ,2 m l5 5% ,2 m l6 2% ,and3 m l8 1% .G r ad i en t sw e r eth enc en t r i fu g edf o r 3 0m ina t1 6 0 0×ginaSo r v a l lL e g end M a ch1 . 6Rb en ch topc en t r i fu g e .Bon em a r r own eu t r o ph i l sw e r ec o l l e c t edf romth e6 2% / 8 1%bo rd e randw a sh edw i thHB S Sb e fo r ecoun t in gand v i a b i l i t ya s s e s sm en t . Inv i t ro funga ldamagea s sa y AnXTTa s s a yw a su s edto m e a su r efun g a lm e t abo l i ca c t i v i t ya sp r e v iou s l yd e s c r i b ed[4 6 ] . B on em a r r owd e r i v ed m a c roph a g e sandCEA 1 0g e rm l in g sw e r e in cub a t edto g e th e r inn o r m o x i co rh yp o x i ccond i t ion sa ta1 0 : 1( e f f e c to r : t a r g e t )r a t iofo r5hou r s .Bon em a r r own eu t r o ph i l sandCEA 1 0g e rm l in g sw e r e in cub a t edto g e th e r inno rmo x i ccond i t ion sa ta1 0 : 1( e f f e c t o r : t a r g e t )r a t i of o r2hou r sw i tho rw i thou t5 0nMCXCL 1[ 8 1 ] .Fo l low in g in cub a t i on ,m a c r o ph a g e so rn eu t roph i l sw e r e l y s edandth er em a in in gfun g iw e r e in cub a t edw i th0 . 4m g /m lXTT and0 . 0 5m g /m lco en z ym eQfo r1handth eop t i c a ld en s i t y(OD )sub s equ en t l ym e a su r edona sp e c t r oph o t om e t e ra taw a v e l en g tho f4 5 0nm .Th ep e r c en tfun g a ld am a g ew a sd e f in edb yth e equ a t i on :( 1 [A ffun g iw i thc e l l s—A450o fc e l l sa lon e ]/[A450o ffun g ia lon e ] ) 1 0 0 . 4 5 0o S ta t i s t i ca lana l y s i s S t a t i s t i c a ls i gn i f i c an c ew a sd e t e rm in edb yaS tud en t ’ st t e s t ,on e -w a yANOVAu s in ga B on f e r r on ip o s t t e s t ,o rK ru s k a l -W a l l i son e -w a yANOVAw i thDunn’ spo s t t e s tth r ou ghth e G r aphP adP r i sm5so f tw a r ea sou t l in e s inth ef i gu r e l e g end s . PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 19 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge Suppo r t ing In fo rma t ion S 1F i g .h IL 1 r at r e a tm en tr e su l t sinimp a i r edcon t ro lo fA sp e r g i l lu sfum i ga tu s. C 5 7BL / 6 1 0c o m i c ew e r et r e a t edw i thr e comb in an th IL 1 r ao rp l a c eboand in f e c t ed i . t .w i th5× 1 07CEA n id i a .F o r t y e i gh thou r spo s t in f e c t ion ,m i c ew e r eeu th an i z ed ,BALFco l l e c t ed ,and lun g ss a v ed f o rh i s t o l o g i c a lan a l y s i s .Fo rm a l in f i x ed lun g sw e r ep a r a f f inemb edd ed ,s e c t ion ed ,ands t a in ed w i thGM Sf o ran a l y s i sb ym i c ro s cop y .A . fum i g a tu sg e rm in a t ionr a t e sw e r ea s s e s s eda t4 8ho f in f e c t i onb ym i c ro s cop i c a l l ycoun t in gbo thth enumb e ro fcon id i aandnumb e ro fg e rm l in g s in GM S s t a in eds e c t ion .Numb e ro fcon id i aandnumb e ro fg e rm l in g sw e r ecoun t edf o re a ch GM S s t a in eds e c t iontoqu an t i f yth ep e r c en tg e rm in a t ion .D a t aa r er ep r e s en t a t i v eo fon ee xp e r im en tc on s i s t in go f5 m i c ep e rg roup .Th eb a rg r aphshowth eg roup m e an s±on eSEM .S t a t i s t i c a l l ys i gn i f i c an td i f f e r en c e sw e r ed e t e rm in edu s in gaS tud en t ’ st t e s t( p<0 . 0 1 ) . (EP S ) S 2F i g .Imp a i r edn eu t roph i lr e c ru i tm en tinth e lun gp a r en ch ym ao fI l 1 r 1 -d e f i c i en tm i c e . 7 C 5 7BL / 6 ,I l 1 r 1 -d e f i c i en t ,andP y c a r d-d e f i c i en tm i c ew e r ech a l l en g ed i . t .w i th5× 1 0CEA 1 0c on id i a .A t1 2 ,2 4 ,and3 6hpo s t ch a l l en g e ,m i c ew e r eeu th an i z ed ,BALFand lun g sc o l l e c t ed f o r f l ow c y t om e t r i can a l y s i so fn eu t r oph i l ,m on o c y t e ,andd end r i t i cc e l lp opu l a t ion sw i thth e lun g s , l i k e + p r e v i ou s l yd on e[1 0 ] .(A )N eu t r oph i l s inth e lun g sw e r e id en t i f i eda sb e in gCD 4 5+L y 6 g+7 / 4 . (B -E )Lun g sw e r ed i g e s t ed inc o l l a g en a s et og en e r a t es in g l ec e l lsu sp en s i on s ,a f t e rwh i chc e l l sw e r e + s t a in ed f o r f l owc y t om e t r i can a l y s i s .Lun gn eu t r oph i l sw e r e id en t i f i e da sCD 4 5 CD 1 1 b+L y 6 g+ + + 7 / 4 (B ) ,CD 1 1 b m a c r oph a g e sw e r e id en t i f i eda sCD 4 5+L y 6 g−CD 1 1 b+CD 1 1 c−CD 1 0 3−(C ) , + + − + + − + CD 1 1 cm a c r oph a g e sw e r e id en t i f i eda sCD 4 5 L y 6 g CD 1 1 b CD 1 1 c CD 1 0 3 (D ) ,CD 1 0 3 d end r i t i cc e l l sw e r e id en t i f i eda sCD 4 5+L y 6 g−CD 1 1 b−CD 1 1 c+CD 1 0 3+(E ) .E a cht im e -p o in tr ep r e s en t s8 – 1 0m i c epo o l ed f r omtw o ind e p end en te xp e r im en t s .D a t aa r ep r e s en t eda sb o xand wh i s k e rp l o t sw i thTu k e ywh i s k e randou t l i e r sd i s p l a y eda sd o t s .S t a t i s t i c a l l ys i gn i f i c an td i f f e r en c e s w e r ed e t e rm in edu s in gaon e -w a yANOVAw i thBon f e r r on i’ sp o s t t e s t(p<0 . 0 5 ; p<0 . 0 1 ) . (EP S ) S 3F i g .M yd 8 8-d e f i c i en tm i c ea r eimp a i r edinth e i rab i l i t ytor e c ru i tn eu t roph i l sa f t e rA s p e r g i l lu sfum i ga tu sch a l l en g e .A g e -m a t ch edC 5 7BL / 6o rM yd 8 8-d e f i c i en tm i c ew e r e in f e c t ed 7 i . t .w i th5× 1 0 CEA 1 0con id i aanda t ind i c a t edt im e -po in t s ,m i c ew e r eeu th an i z ed ,andBALF c o l l e c t ed .T o t a lm a c roph a g e( l e f tp an e l )andn eu t roph i l( r i gh tp an e l )r e c ru i tm en t inth eBALF w a sm e a su r eda t1 2and2 4hpo s t ch a l l en g e .D a t aa r er ep r e s en t a t i v eo fa t l e a s t2 ind ep end en t e xp e r im en t sa te a cht im epo in tcon s i s t in go f3 –5 m i c ep e rg roup .B a rg r aph ssh owth eg r oup m e an s±on eSEM .S t a t i s t i c a l l ys i gn i f i c an td i f f e r en c e sw e r ed e t e rm in edu s in gS tud en t’ st t e s t (p<0 . 0 5 ; p<0 . 0 1 ) . (T IF ) S 4F i g .P y ca rd-d e f i c i en tm i c et r e a t edw i thIL -1 αn eu t r a l i z in gan t ibod ya r eh i gh l y su s c ep t ib l etoA sp e r g i l lu sfum i ga tu sin f e c t ion .C 5 7BL / 6o rP y c a rd-d e f i c i en tm i c et r e a t edw i th 7 i s o t yp ec on t r o lan t ibod yo rIL 1 αn eu t r a l i z in gan t ibod yw e r e in f e c t ed i . t .w i th5× 1 0 CEA 1 0 c on id i a .Tw en t y fou rhou r spo s t in f e c t ion m i c ew e r eeu th an i z ed ,BALFco l l e c t edand lun g s s a v edf o rh i s t o lo g i c a lan a l y s i s .Fo rm a l in f i x ed lun g sw e r ep a r a f f inemb edd ed ,s e c t i on ed ,and s t a in edGM Sfo ran a l y s i sb ym i c ro s cop y .A . fum i g a tu sg e rm in a t ionr a t e sw e r ea s s e s s ed4 8h a f t e rch a l l en g eb ym i c ro s cop i c a l l ycoun t in gbo thth enumb e ro fcon id i aandnum b e ro f g e rm l in g s inGM S s t a in eds e c t ion .D a t aa r er ep r e s en t a t i v eo ftwo ind ep end en te xp e r im en t s –5m i c ep e rg roup .Th eb a rg r aphshowth eg roup m e an s±on eSEM .S t a t i s t i c a l l y c on s i s t in go f4 s i gn i f i c an td i f f e r en c e sw e r ed e t e rm in edu s in gaon e -w a yANOVAw i thBon f e r r on i ’ sp o s t t e s t . 0 1 , p<0 . 0 0 1 ) . ( p<0 (T IF ) PLOSPa thogens |DO I :10 .1371 / jou rna l .ppa t .1004625 Janua r y28 ,2015 20 /25 Ro leo f IL -1C y to k ine sa f te rA spe rg i l lu sfum iga tu sCha l lenge S 5F i g .In t r a t r a ch e a l l yp ro v i s iono fCXCL1toan t i IL1αt r e a t edC57BL /6 m i c ein c r e a s e sr e s i s t an c etoA sp e r g i l lu sfum i ga tu sin f e c t ion .C 5 7BL / 6m i c ew e r et r e a t edw i thgo a tI gGo ran t i 7 IL 1 α2 4hp r i o rtoand2 4ha f t e r i . t .ch a l l en g ew i th5× 1 0 CEA 1 0con id i a .Th r e eh ou r sp o s t ch a l l en g eh a l fth ean t i IL 1 αt r e a t ed m i c ew e r eg i v en0 . 5μgCXCL 1 inPB So rPB Sa l on eg i v en i . t .A t4 8hp o s t in f e c t ion m i c ew e r eeu th an i z ed ,BALFco l l e c t ed ,and lun g ss a v edf o rh i s t o l o g i c a lan a l y s i s .F o rm a l in f i x ed lun g sw e r ep a r a f f inemb edd ed ,s e c t ion edands t a in edw i thGM S f o ran a l y s i sb ym i c ro s cop y .(A )A . fum i g a tu sg e rm in a t ionr a t e sw e r ea s s e s s ed4 8ha f t e rch a l l en g eb ym i c r o s cop i c a l l ycoun t in gbo thth enumb e ro fcon id i aandnumb e ro fg e rm l in g s in GM S s t a in eds e c t ion .(B )To t a lm a c r oph a g e( l e f tp an e l )andn eu t r oph i l( r i gh tp an e l )r e c r u i tm en t inth eBALFw a sm e a su r eda t2 4hpo s t ch a l l en g e .D a t aa r er ep r e s en t a t i v eo ftw o ind ep end en t e xp e r im en t sc on s i s t in go f3 – 5m i c ep e rg r oup .B a rg r aph ssh owth eg r oupm e an s±on eSEM . ’ s S t a t i s t i c a l l ys i gn i f i c an td i f f e r en c e sw e r ed e t e rm in edu s in gaon e -w a yANOVAw i thB on f e r r on i p o s t t e s t(p<0 . 0 5 ) . (T IF ) Acknow ledgmen ts Th an ky out oD r .Tob i a sHoh l(M SKCC )whop ro v id ed m an yh e lp fu lsu g g e s t ion sandsh a r ed unpu b l i sh edd a t ar e l a t edtoth i sp ro j e c t .Th eau tho r sw i shtoth an kD r .V i sh v aD i x i t(G en en t e ch )andD r .M a r kJu t i l a(Mon t an aS t a t eUn i v e r s i t y )fo rp ro v id in gth eo r i g in a lb r e ed in gp a i r s o fth eP y c a r d-andM yd 8 8-d e f i c i en tm i c e ,r e sp e c t i v e l y .Th an kyoutoD r .Ch a r l e sD in a r e l l of o r p r o v id in gth eh IL 1 r ar e a g en tandsh a r in gth ep ro to co lfo rb lo c k in gIL 1αinv i v o .A l s o ,th an k s t oD r s .J o v an k aVo y i ch ,M a t th ewT a y lo r ,andB l a k eW i ed enh e f t(Mon t an aS t a t eUn i v e r s i t y ) f o rh e lp fu ld i s cu s s ionabou tth i sp ro j e c tand m anu s c r ip t . 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