แนวทางการดูแลรักษาเด็กและวัยรุ่ นติดเชื้อเอช ไอ วี พ. ศ. 2556 รศ พญ ธันยวีร ์ ภูธนกิจ หน่ วยโรคติดเชื้ อ ภาควิชากุมารเวชศาสตร์ คณะแพทยศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย HIVNAT, ศูนย์วจิ ยั โรคเอดส์ สภากาชาดไทย thanyawee.p@hivnat.org 02-256-4930 Pediatric HIV and co-infection 25-26 July, 2013 แนวทางการดูแลเด็กและวัยรุ่นติดเชื้ อเอชไอวี 2013 สถานการณ์ การรักษาผูต้ ิดเชื้ อเอชไอวีทวั ่ โลก การเริ่มยาต้านไวรัส (When to start?) ในทารก-เด็ก-วัยรุ่น สูตรยาต้านไวรัส (What to start?) ในทารก-เด็ก-วัยรุน่ การติดตามหลังเริ่มยาต้านไวรัส (Treatment monitoring) People receiving ART: 2003-2012 WHO 2015 Target 15 million on Treatment WHO 3 by 5 campaign 9.7 million by 2012 630,000 children 4.2 million AIDS death averted from ART 0.3 million at 2002 WHO Global update on HIV treatment 2013 Children (0-14 yr) receiving ART by 2012 WHO Global update on HIV treatment 2013 New Pediatric HIV case: 1996-2012 2015 Target Elimination of HIV PMTCT > 90% of pregnant women received ART 800,000 new pediatric HIV has been averted during 2005-2012 2015 WHO Global update on HIV treatment 2013 PMTCT coverage by WHO region WHO Global update on HIV treatment 2013 Framework of HIV treatment and care ENTRY POINT S PED ARV CLINICS UNDERSTAND DYNAMICS WHO Global update on HIV treatment 2013 When to start ? • • • • Early infant diagnosis HIV functional cure: Mississippi Baby Update WHO treatment guideline 2013 Thai MOPH treatment guideline 2013 HIV diagnosis: 1st step of linkage to care Entry Points: Infant born from HIV +ve mother Mother: 2 HIV tests at 1st, 3rd trimester Statistics 2012: Prevalence of HIV in pregnant ANC = 0.6% no ANC = 3.1% Father: couple counseling Statistics 2012: only 20% of father was tested Other entry points: severe infection, TB clinic, malnutrition, immunization clinic การวินิจฉัยการติดเชื้อเอชไอวีในทารก Laboratory for Early Infant Diagnosis HIV DNA PCR (ตรวจหาเชื้ อไวรัสจากเม็ดเลือดขาว) +/ HIV RNA PCR (ตรวจหาปริมาณไวรัสในพลาสมา) copies/ml ควรเริม่ ตรวจเมื่อไหร่ ความเสี่ยงสูง (มารดาได้รบ ั ยาต้าน < 4 สัปดาห์ หรือ HIV VL > 1000 c/ml) แนะนาเจาะเลือด 3 ครั้ง 1,2,4 เดือน (หากผลเลือดบวก จะได้ไม่ตอ้ งหยุด ART) ความเสี่ยงต ่า แนะนาเจาะเลือด 2 ครั้ง ครั้งแรกอายุ 1-2 เดือน และซ้าเมื่ออายุ ตั้งแต่ 4 เดือน ควรเจาะเลือดซ้าเมื่อไหร่ (ต้องการผลยืนยัน 2 ครัง้ ) หากผลPCR เมื่ออายุ 1-2 เดือนเป็ นบวก ควรรี บตรวจซ้ าทันที หากผล PCR เมื่ออายุ 1-2 เดือนเป็ นลบ ควรตรวจซ้ าเมื่ออายุ 4 เดือน Linkage into HIV care: Thailand Number of infant positive at first PCR Total infant received CD4 count test Total infant initiated ART 118 108 104 94 92 81 65 63 57 44 37 32 Mean age (days) at first CD4 Mean age (days) at ART 81 78 2007 2008 2009 2010 2011 517 429 379 269 176 535 425 398 268 156 35 NAP database: 30 Jun 2012 Functional cure: a Mississippi baby HIV RNA 30 hours HIV DNA+ AZT/3TC/NVP started on day 1 Loss to follow up and stop ART at age 18 months AZT/3TC/LPV/r from day 7 Persaud D, 2013 Oral late breaker, Abstract 48LB When to start: WHO guideline 2013 AGE GROUP <1 YEARS 1-2 YEARS 2-5 YEARS ≥5 YEARS 2010 RECOMMENDATIONS AGE GROUP 2013 RECOMMENDATIONS Treat ALL Strong recommendation, moderate-quality evidence Treat ALL Conditional recommendation, very-low-quality evidence Initiate ART with CD4 count ≤750 cells/mm3 or <25%, irrespective of WHO clinical stage < 1 YEAR Treat ALL Strong recommendation, moderate-quality evidence 1-5 YEARS Treat ALL Conditional recommendation, very-lowquality evidence Priority: children < 2 years or WHO stage 3-4 or CD4 count ≤ 750 cells/mm3 or < 25% Initiate ART with CD4 count ≤350 cells/mm3 (As in adults), irrespective of WHO clinical stage AND WHO clinical stage 3 or 4 ≥5 YEARS CD4 ≤ 500 cells/mm3 Conditional recommendation, very-lowquality evidence CD4 ≤350 cells/mm³ as a priority (As in Adults) Strong recommendation, moderate-quality evidence When to start: Thai guideline: 2013 US 2012 PENTA 2009 Thai 2013 < 1 year All All All 1-3 year CDC cat B, C or CD4 < 25%, < 1000 cell/mm3 CDC cat B, C or CD4 < 25%, < 1000 cell/mm3 CDC cat B, C or CD4 < 25% or < 1000 cell/mm3 3-5 year CDC cat B, C or CD4 < 25%, < 750 cell/mm3 CDC cat B, C or CD4 < 25%, < 500 cell/mm3 CDC cat B, C or CD4 < 25% or < 500 cell/mm3 5- 15 year CDC cat B, C or CDC cat B, C or CDC cat B, C or CD4 < 500 cell/mm3 CD4 < 350 cell/mm3 CD4 < 500 cell/mm3 < 350 cell (AI) 350-500 cell (BII) Infant < 3 mo: Early treatment lower AIDS/Death Death: 4% versus 16% (HR = 0.24, p <0.001) Cat C: 6.3% versus 25.6% ( HR = 0.25, p<0.001) CHER trial CIPRA South Africa; Violari A. NEJM 2008;359:2233-44. Children: when to start ? • PREDICT trial1 (1-12 years, RCT n=300) AIDS-free survival did not differ between deferred (CD4 <15%) and early treatment (CD4 15-24%) 144 week survival = 98.7% vs 97.9% • IeDea SA2 (2-5 years, cohort n = 5,732) 3-year mortality rate was not difference in Rx all and using CD4 threshold All vs CD4 < 25% vs CD4 < 15% 4.5% vs 4.5% vs 5.3% 1 Puthanakit T. Lancet Infect Dis 2012:933-941. 2 Schomaker M. IeDEA Southern Africa Collaboration 2012 Children: Effect of ART Growth outcomes South African cohort (N= 2,399) 2 year of HAART: only 81%, 64% achieved normal weight, height Risk factors of poor recovery: age > 3 year, baseline severe growth failure PREDICT study Early treatment has better growth parameter at 3 years of F/U Cognitive function outcomes No different in cognitive function at 3 years of F/U between early and deferred treatment in the PREDICT study Feinstien L et al. J Acquir Immune Defic Syndr 2012;61:235–242 Puthanakit T et al. Ped Infect Dis J 2013:32:501-8. Adult: Treatment as Prevention (TasP) HAART initiation when CD4 350-550 cell/mm3 versus CD4 < 350 cell 96% reduction in HIV transmission to uninfected partners Early N =886 Defer N = 877 Criteria to Rx: CD4 cell 350-550 cell < 250 , < 350 cell No. of infected partner 1 27 Morbidity/mortality 40 65 Death 10 13 Extrapulmonary TB 3 7 < 0.0001 0.001 Cohen M et al. N Eng J Med 2011; 365:493-505. What to start- 1st line HAART ? Infant < 3 year : LPV/r is better than NVP : Switch strategies Children 3-10 year : EFV > NVP Adolescent > 10 year: TDF-based once daily regimen Approved antiretroviral drugs in children NRTI NNRTI Protease Inhibitor Integrase Inhibitor Entry inhibitor Zidovudine Nevirapine Lopinavir/r ( > 2 week) Raltegravir (> 2 years) Enfuvirtide (> 6 years) Stavudine Efavirenz (> 3 mo) Atazanavir/r (> 6 years) Elvitegravir Maraviroc > 16 years Lamivudine Emtricitabine Etravirine (> 6 years) Darunavir/r (> 3 years) Dolutegravir Didanosine > 2 weeks Rilpivirine > 12 years Fosamprenavir (> 6 months) Abacavir > 3 months Tenofovir > 2 years Tipranavir/r (> 2 years) DHHS pediatric HIV treatment guideline Nov 1, 2012 What to start ? WHO 2013 2013 recommendations Age group < 3 years 3-10 years PI LPV/r is preferrred NVP as alternative 2 NRTIs ABC+ 3TC or AZT +3TC NNRTI EFV is preferred NVP as alternative 2NRTIs In preferential order: ABC + 3TC or AZT + 3TC or TDF + FTC (3TC) NNRTI 2NRTIs EFV is preferred NVP as alternative In preferential order: TDF + FTC or 3TC ABC + 3TC AZT + 3TC 10-19 years (weighing ≥35 kg) What to start: Thai guideline 2013 (draft) < 1 year Preferred Alternative 1-3 years 3-12 years > 12 years AZT+ 3TC+ LPV/r AZT+3TC+LPV/r ABC+ 3TC+ LPV/r AZT+ 3TC + EFV ABC+3TC+LPV/r AZT+ 3TC+ NVP ABC+ 3TC + EFV ABC+ 3TC+NVP TDF + 3TC + EFV AZT+3TC +NVP AZT+3TC +NVP d4T +3TC +LPV/r TDF +3TC + EFV d4T +3TC +NVP d4T +3TC+NVP AZT +3TC +EFV AZT +3TC +NVP Efficacy of LPV/r-based HAART in infants 6 mo-3 yr(P1060) Cohort I: Exposed to SD-NVP (N =164) Palumbo P et al. N Eng J Med 2010;363:1511-20. Efficacy of LPV/r-based HAART in infants 6 mo-3 yr(P1060) Cohort II: Not exposed to SD-NVP (N =288) Violari A et al. N Eng J Med 2012;366:2380-9. Treatment switch to NVP-based after initial VL suppression with LPV/r-based ART (NEVEREST) Cumulative probability of VL rebound > 1000 c/ml At week 72 = 10% vs 24% Continue LPV/r-based Switch to NPV-based Can switch from LPV/r to NVP after VL < 50 copies/ml. Must perform at 24-48week after switch to detect one with VL rebound Kuhn L. Lancet Infect Dis 2012:12:521-30. HAART in children: EFV, NVP, PI - Efficacy of EFV versus NVP, EFV versus boosted PI Dosage of EFV in children 3 month to 3 years Dosage in adult 400 mg versus 600 mg (ENCORE study) Metaanalysis on risk of congenital malformation when use in women with child bearing age Children: EFV versus NVP-based ART Botswana-Baylor retrospective cohort HIV-infected children 3-16 years (N= 804) Median age 8 years, CD4 = 13%, Plasma HIV RNA = 5.3 log10 copies/ml NRTI backbone: AZT/3TC 92% F/U time 69 months VL failure at 5 year EFV = 12.8% NVP = 25.1% Lowenthal ED. JAMA 2013;309:1803-9. Children: PI and NNRTI-based similar VL outcome NRTI RAM 1-2 >3 6% 2% 22% 5% The PENPACT-1 Study Team. Lancet Infect Dis. 2011;11:273-83. Efavirenz:FDA approved for > 3 mo May 2013; EFV was approved for children 3-36 month Body weight Dosage 3.5 to 5 kg 100 mg 5 to 7.5 kg 150 mg 7.5 to 15 kg 200 mg 15 to 20 kg 250 mg 20 to 25 kg 300 mg 25 to 32.5 kg 350 mg 32.5 to 40 kg 400 mg > 40 kg 600 mg • Open capsule mixed with food • Use within 30 min after mixing • Avoid food 2 hours after http://www.fda.gov/ForConsumers/ByAudience/ForPatientAd vocates/HIVandAIDSActivities/ucm350744.htm EFV: adult dose 400 mg vs 600 mg EFV 400 mg (N=321) EFV 600 mg ( N=309) Mean age (years) 36 (10) 36 (10) Mean CD4 cell 273(97) 271(101) 4.76 (0.84) 4.73(0.90) HIV RNA < 200 copies/ml 94.1% 92.2% EFV-related adverse events 36.8% 47.2% % Discontinuation due to EFV- AE 1.9% 5.8% Baseline characteristics Median HIV RNA (log10) At week 48 EFV 400 mg has non-inferior virological efficacy compare to EFV 600 mg and has lower rate of discontinuation due to adverse events Puls R, ENCORE1 Study Group: IAS 2013 WELBB01 HAART in children: NRTIs backbone - Start with non-thymidine analogue Once daily regimen Abacavir, Tenofovir ART Regimen Sequences Current practice AZT(d4T) + 3TC + EFV(NVP) New approach TDF (ABC) + 3TC + EFV (NVP) NRTIs + LPV/r or ATV/r TDF+ 3TC + Boosted PI Abacavir use in children CON PRO Use as a once daily Cost, availablity Combination tablet: ABC/3TC (Kivexa) Low risk of metabolic complication Resistance mutation: Risk of ABC hypersensitivity, recommend for HLA-B*5701 screening prior to start Rx % HLA-B*5701 among Thais K65R, M184V, L74V, Y115F = 4.0% (95% CI: 1.6-8.0%) Dosage (8 mg/kg/day) 14 to 21 kg 300 mg/day >21 to < 30 kg 450 mg/day > 30 kg 600 mg/day Few data in large scale program in children compare to AZT, d4T Puthanakit T. Ped Infect Dis J 2013;32:252-3. Abacabir in children; ARROW trial VL < 400 copies/ml A: ABC/3TC/NNRTI B: ABC/AZT/3TC/NNRTI ABC/3TC/NNRTI C: ABC/AZT/3TC/NNRTI ABC/AZT/3TC week 24 week 144 77% 84% 88% (p= 0.009) 65% (p =0.009) ARROW Trial Lancet 2013; 381: 1391-1403 Poorer VL outcome: ABC vs d4T Johannesburg observational cohort VL < 400 c/ml 100% 91% LPV-based 90% 80% 77% 71% 67% 70% 60% 50% 40% EFV-based 88% 51% ABC d4T 51% 40% 30% 20% 10% 0% N Mo 6 88 351 Mo 12 106 480 Mo6 Mo12 81 398 117 659 Technau KG, et al.Ped Infect Dis J 2013; 32:851-5. Tenofovir disoproxil fumarate (TDF)in children Jan 18, 2012: US FDA approved tenofovir for treatment of HIV-infected children > 2 years Body weight TDF daily dose 17 - < 22 kg 150 mg 22-<28 kg 200 mg 28-<35 kg 250 mg > 35 kg 300 mg LPV/r decrease tenofovir clearance Population PK among 93 children from 5-18 years of age with 283 samples Without LPV/r With LPV/r TDF daily dosage 20 to 30 kg 20-40 kg 150 mg >30-40 kg >40-55 kg 225 mg > 40 kg > 55 kg 300 mg 2012 DHHS guideline recommend TDF for children with Tanner stage 4-5 and consider in stage 3 and use as alternative in stage 1-2 2013: WHO guideline recommend TDF for age > 10 years and BW > 35 kg Bouazza N, et al. JAIDS 2011; 58: 283-8. Tenofovir use in children: Monitoring for toxicity Renal toxicity Risk for acute renal failure or eGFR < 60 /ml/min:0.2-1.7% Proximal tubular dysfunction – hypophosphatemia: 2-4% Longer exposure – increase risk More risk of toxicity when combine with boosted PI > NNRTI Bone mineral density Decline in BMD from baseline, usually occur during first 6-12 months of treatment, stable thereafter Adult: risk of osetoporotic fracture 1.12 compare to non-tenofovir regimen Children: clinical significance of low BMD is unknown GS-7340 (TAF)specific uptakes in the lymphoid cells; 25 mg compare to 300 mg TDF Single tablet regimens for children Tenofovir 300/emtricitabine 200 /efavirenz 600(Atripla) Age > 12 years and BW > 40 kg Tenofovir 300 /emtricitabine 200 /rilpivirine 25(Complera) Age > 18 years Tenofovir/emtricitabine/elvitegravir/cobicistat (Quad 1/ Stribild) Age > 18 years Cobicistat = a pharmacoenhancer, inhibitor P450 3A enzymes, = boosts intestinal absorption of atazanavir, darunavir, GS7340 Drug development: monthly injectable ART GSK 744 HIV integrase inhibitor/ dolutegravir analogue Injectable nanosuspension; IM SC Achieve plasma concentration > 4 times IC90 in healthy adults TMC-278 LA Long-acting nanosuspension of rilpivirine (NNRTI) IM loading 1200 mg then maintenance 600 mg q 4 week Plasma level comparable to oral rilpivirine 25 mg/day Spreen W. IAS 2013 WEAB0103 Treatment monitoring Point of care testing CD4 Point of care testing plasma HIV RNA “International drug purchasing facility” established in 2006 To improve access to treatment and diagnositics for HIV TB Malaria in low-income countries. Laboratory monitoring: CD4 CD4 test Point of care testing will help for linkage to HIV treatment 25 ul of whole blood CD4 cell count report in 20 min AlereTM Prima CD4 / http://alerehiv.com/hiv-monitoring/alere-pima-cd4 CD4 Product Pipeline Alere Pima CD4 HumaCount BD Zyomyx mBio Partec Mini 2009 Omega Diagnostics Daktari 2010 2011 2012 2013 Instruments *Estimated - timeline and sequence may change Murtagh slide collection 2014 Disposable CD4 monitoring Less important after immune recovery to threshold level and have HIV virological suppression Adult patient who had CD4 > 300 cell/mm3 and HIV RNA < 200 copies/ml are unlikely to have CD4 drop < 200 cell/mm3, Only 3% in 4 years of follow-up How to break the habit ? Gale et al.Clin Infect Dis 2013; 56:1340-3. Laboratory monitoring: Viral load Plasma HIV Viral load Recommended Base for treatment monitoring on NHSO data; only 60% of children have annual VL testing WHO threshold for switching regimen: VL > 1000 copies/ml Point of care testing for HIV Viral load Liat Platform 200 Ul plasma or 50 ul fingerstick blood Turn around time 30-55 min Pipeline: HIV Viral Load and Early Infant diagnosis (EID) Micronics Liat Alere Q WAVE 80 EOSCAPE ALL Cavidi AMP Lynx EID Biohelix SAMBA EID SAMBA VL NWGHF VL Gene XPert Lumora 2012 2013 2014 2015 Murtagh slide collection 2016 Recommend further readings http://www.jiasociety.org/index.php/jias/pages /view/thematicadolescents http://www.who.int/hiv/pub/guid elines/arv2013/en/index.html Thank you for your attention