Allergy POSITION PAPER In vitro tests for drug hypersensitivity reactions: an ENDA/ EAACI Drug Allergy Interest Group position paper C. Mayorga1,2, G. Celik3, P. Rouzaire4, P. Whitaker5, P. Bonadonna6, J. Rodrigues-Cernadas7, A. Vultaggio8, K. Brockow9, J. C. Caubet10, J. Makowska11, A. Nakonechna12, A. Romano13, M. I. Mon~ ez14, J. J. Laguna15, G. Zanoni16, J. L. Gueant17, H. Oude Elberink18, J. Fernandez19, S. Viel20, tan P. Demoly21 & M. J. Torres2 on behalf of In vitro tests for Drug Allergy Task Force of EAACI Drug Interest Group 1 Research Laboratory, IBIMA-Regional University Hospital of Malaga-UMA; 2Allergy Unit, IBIMA-Regional University Hospital of MalagaUMA, Malaga, Spain; 3Division of Immunology and Allergy, Department of Chest Diseases, Ankara University School of Medicine, Ankara, Turkey; 4Department of Immunology and ERTICa Research Group, University Hospital of Clermont-Ferrand and Auvergne University, Clermont-Ferrand, France; 5Regional Adult Cystic Fibrosis Unit, St James’s Hospital, Leeds, UK; 6Allergy Unit, Azienda Ospedaliera Universitaria Intergata of Verona, Verona, Italy; 7Immunoallergology Department, Faculty of Medicine, Centro Hospitalar S~ ao Jo~ ao, Porto, Portugal; 8Immunoallergology Unit, Department of Biomedicine, Careggi Hospital, Florence, Italy; 9Department of Dermatology and €nchen, Munich, Germany; 10Pediatric Allergy Unit, Department of Child and Adolescent, Allergology Biederstein, Technische Universit€at Mu University Hospitals of Geneva, Geneva, Switzerland; 11Department of Immunology, Rheumatology and Allergy, Healthy Ageing Research dz, Poland; 12Allergy and Immunology Clinic, Royal Liverpool and Broadgreen University Hospital, Center, Medical University of Łodz, Ło 13 Liverpool, UK; Allergy Unit Complesso Integrato Columbus, Rome and IRCCS Oasi Maria S.S., Troina, Italy; 14BIONAND-Andalusian Centre for Nanomedicine and Biotechnology, Malaga; 15Allergy Unit, Hospital de la Cruz Roja, Madrid, Spain; 16Section of Immunology, Department of Pathology and Diagnostics, University of Verona, Verona, Italy; 17Department of Molecular Medicine and Personalized Therapeutics and Inserm UMRS 954N-GERE (Nutrition-Genetics-Environmental Risks), University Hospital of Nancy and University of Lorraine, Nancy, France; 18 Department of Allergology, GRIAC Research Institute, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands; 19Allergy Section, Alicante University Hospital, UMH, Alicante, Spain; 20Laboratory of Immunology, Centre Hospitalier Lyon ^pital Arnaud de Villeneuve, University Hospital of Montpellier, and Sorbonne Universite s, Sud, Hospices Civils de Lyon, Lyon, France; 21Ho UPMC Paris 06, UMR-S 1136, IPLESP, Equipe EPAR, Paris, France To cite this article: Mayorga C, Celik G, Rouzaire P, Whitaker P, Bonadonna P, Cernadas JR, Vultaggio A, Brockow K, Caubet JC, Makowska J, Nakonechna A, Romano ~ez MI, Laguna JJ, Zanoni G, Gueant JL, Oude Elberink H, Fernandez J, S Viel, Demoly P, Torres MJ, on behalf of In vitro tests for Drug Allergy Task Force of A, Montan EAACI Drug Interest Group. In vitro tests for drug hypersensitivity reactions: an ENDA/EAACI Drug Allergy Interest Group position paper. Allergy 2016; 71: 1103–1134. Keywords diagnosis; drug hypersensitivity; IgE; in vitro; T cells. Correspondence Maria Jose Torres, MD, PhD, Allergy Service, IBIMA-Regional University Hospital of Malaga (Pavilion C), Plaza del Hospital Civil. 29009 Malaga, Spain. Tel.: +34-951290224 Fax: +34-951290302 E-mail: mjtorresj@ibima.eu Accepted for publication 12 March 2016 DOI:10.1111/all.12886 Edited by: Werner Aberer Abstract Drug hypersensitivity reactions (DHRs) are a matter of great concern, both for outpatient and in hospital care. The evaluation of these patients is complex, because in vivo tests have a suboptimal sensitivity and can be time-consuming, expensive and potentially risky, especially drug provocation tests. There are several currently available in vitro methods that can be classified into two main groups: those that help to characterize the active phase of the reaction and those that help to identify the culprit drug. The utility of these in vitro methods depends on the mechanisms involved, meaning that they cannot be used for the evaluation of all types of DHRs. Moreover, their effectiveness has not been defined by a consensus agreement between experts in the field. Thus, the European Network on Drug Allergy and Drug Allergy Interest Group of the European Academy of Allergy and Clinical Immunology has organized a task force to provide data and recommendations regarding the available in vitro methods for DHR diagnosis. We have found that although there are many in vitro tests, few of them can be given a recommendation of grade B or above mainly because there is a lack of well-controlled studies, most information comes from small studies with few subjects and results are not always confirmed in later studies. Therefore, it is necessary to validate the currently available in vitro tests in a large series of well-characterized patients with DHR and to develop new tests for diagnosis. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 1103 Mayorga et al. Drug hypersensitivity reactions (DHRs) are frequently encountered and can lead to serious outcomes, making them of great concern both in outpatient and in hospital care. It is not only the acute DHRs that cause problems, but also the issues related to patient reporting can also lead to uncertainty for doctors in terms of what drugs to prescribe. Alternative drugs may be more expensive and less effective than the original drug to which the patient reacted. To avoid the negative social and economic impact caused by alternative treatments, it is important to establish simple tests to help clinicians choose the correct medication. Diagnosis of DHRs is primarily based on a detailed clinical history and in vivo procedures, such as skin testing (ST) and drug provocation tests (DPT). The Interest Group on Drug Allergy from the European Academy of Allergy and Clinical Immunology (EAACI) has made position statements on general procedures for collecting clinical history and performing ST and DPT (1–4); as well as specific procedures for the most frequent DHR-inducing drugs such as beta-lactams (BLs), nonsteroidal anti-inflammatory drugs (NSAIDs) and radio-contrast media (RCM) (5–9). In the recent International Consensus on drug allergy (10), the need for biological tests to establish the nature of culprit agents and to predict immunogenicity was highlighted. This would be particularly helpful for those patients who received several drugs simultaneously and for severe life-threatening DHRs where skin tests are not possible or appropriate, and DPT is contraindicated. However, expert consensus has not been reached on the value of in vitro methods for DHR diagnosis. The aim of this review was to provide data and recommendations regarding in vitro methods currently available for the diagnosis of DHR based on published studies. Abbreviations 15-HETE, 15-hydroxyeicosatetraenoic acid; AGEP, acute generalized exanthematic pustulosis; BA, biological agents; BAT, basophil activation test; BLs, beta-lactams; CAST, cellular antigen stimulation test; CFSE, carboxyfluorescein diacetate succinimidyl ester; COX-1, cyclooxygenase-1; CysLTs, cysteinyl leukotrienes; DHR, drug hypersensitivity reaction; DPT, drug provocation tests; DRESS, drug reaction with eosinophilia and systemic symptoms; EAACI, European Academy of Allergy and Clinical Immunology; ELISA, Enzyme-linked immunosorbent assay; ELISpot, enzymelinked immunosorbent spot; FDE, fixed drug eruption; FEIA, fluoroimmunoassay; GR, grade of recommendation; HSA, human serum albumin; IR, immediate reactions; LE, level of evidence; LTC, leukotriene; LTT, lymphocyte transformation test; MPE, maculopapular exanthema; NECD, NSAID-exacerbated cutaneous diseases; NERD, NSAID-exacerbated respiratory diseases; NIR, nonimmediate reactions; NIUA, NSAID-induced urticaria angioedema; NSAIDs, nonsteroidal anti-inflammatory drugs; PG, prostaglandins; PLL, poly-L-lysine; RAST, in-house radioallergosorbent test; RCM, radio-contrast media; RIA, radioimmunoassay; sIgE, specific IgE; SJS/TEN, Stevens–Johnson syndrome/toxic epidermal necrolysis; ST, skin testing; a-gal, galactose-1,3-galactose. 1104 Methods A bibliographic search was performed using electronic databases (MEDLINE and PubMed), electronic libraries (Science Direct, OVID) and a systematic review database (Cochrane library). Publications were selected from the 1983–2015. Keywords were DHR, allergy, intolerance, idiosyncrasy, in vitro tests, IgE and specific reactions, drugs, cells and mediators. In total, 228 publications were reviewed and evaluated on the basis of title and abstract; of these, 150 were selected because they met the selection criteria (observational studies or case series larger than five subjects) and analysed, discussed, confirmed or amended by group consensus. Key statements were provided with a level of evidence (LE) and grade of recommendation (GR) according to the SIGN statement (11). Where evidence was lacking, a consensus was reached among the experts of the task force. DHR classification From a mechanistic point of view, DHRs are classified as allergic or nonallergic reactions. Allergic DHR These comprise 5–10% of adverse drug reactions (12) and can belong to any of the four types proposed in the Coombs and Gell classification (13), with types I and IV being the most frequent (Table 1). While drugs can also induce type II and III reactions, these are somewhat uncommon and discussion of their in vitro evaluation is beyond the scope of this position paper. Type I (immediate) reactions (IR) are induced by specific IgE (sIgE) antibodies, which are produced against a hapten– carrier conjugate during a sensitization phase (usually asymptomatic) and subsequently attached to high-affinity IgE receptors on mast cells or basophils. Re-exposure and crosslinking of sIgE lead to the cell activation and the release of several mediators, resulting in the symptoms (13). Type IV (nonimmediate) reactions (NIR) are mediated by T cells, and due to the involvement of different cytokines, cytotoxic mediators and cell subtypes, it can induce wellcharacterized clinical entities (14). Nonallergic DHR This group includes all other DHRs without a demonstrated immune mechanism (9). Although many drugs could induce these reactions, for example NSAIDs, RCM or opioids, the former are the most frequent elicitors and the pathogenesis involves cyclooxygenase-1 (COX-1) inhibition (9). This produces an increase in cysteinyl leukotrienes (CysLTs), prostaglandins (PG) D2, 15-hydroxyeicosatetraenoic acid (15-HETE) with an overexpression of leukotriene (LTC4) synthase and a decrease in PGE2 (9). Nonallergic DHRs to NSAIDs have been classified as (9) NSAID-exacerbated respiratory disease (NERD), NSAIDexacerbated cutaneous disease (NECD) and NSAID-induced urticaria/angioedema (NIUA). Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Table 1 Classification and mechanisms involved in drug allergy Types of reaction Immune response Pathomechanism Clinical features Chronology of the reaction I IgE mediated Mast cell and basophil degranulation 1–6 h after the last intake of the drug II IgG/IgM and complement III IgG/IgM and complement or FcR IgG/IgM and complementdependent cytotoxicity Deposition of immune complexes IVa Th1 monocyte/macrophages via IFN-c/TNF-a Th2 via IL-4, IL-5, IL-13, eotaxin Monocytic inflammation Urticaria, angioedema, bronchospasm, anaphylactic shock Cytopenia, anaemia, Thrombocytopenia Serum sickness, urticaria, lymphadenopathy, fever, arthropathy, vasculitis Eczema, contact dermatitis, bullous exanthema Maculopapular exanthema, DRESS IVc CD4 + /CD8 + cytotoxic T cells via perforin, granzyme B, FasL Keratinocyte death Maculopapular exanthema, SJS/TEN, pustular exanthema, fixed drug eruption IVd T cells via IL-8/CXCL8 and GM-CSF Neutrophilic inflammation Acute generalized exanthematous pustulosis IVb Eosinophilic inflammation Diagnosis Clinical history is the first approach for diagnosis; however, it is often unreliable and can lead to either over- or underdiagnosis. This results in a restriction of therapeutic options for the patient. Skin testing has been standardized and can be useful for diagnosing allergic reactions, especially in IR and for some drugs, such as BLs (7). However, with NIR, the rate of positive responses, even with BLs, is rather low (15). This means that in a large number of cases, DPT is the only test that can confirm the reaction (4, 9). DPT are not risk-free, and they are timeconsuming and must be performed in a specialized setting by trained personnel. They can also be inappropriate for some types of reactions. Thus, in vitro tests represent a potentially safer procedure for diagnosing DHRs; however, DPT results should be used whenever possible to validate in vitro tests. Although many tests are available, there is currently no consensus on their diagnostic value in routine clinical care. In vitro diagnostic tests In vitro diagnostic tests can be useful for the evaluation of cells involved and mediators released during the acute phase of the reaction and for the identification of the culprit drug after resolution. The methods used for the diagnosis of a DHR depend on the mechanism involved and reaction kinetics. Tests to characterize the active phase of the reaction Several mediators including tryptase, histamine (and metabolites), PG, LTC4, LTD4, pro-inflammatory cytokines and 5–15 days after starting the eliciting drug 1–8 days for serum sickness/ urticaria 7–21 days for vasculitis 1–21 days after starting the eliciting drug 1-several days after starting the eliciting drug for MPE 2–6 weeks after starting the eliciting drug for DRESS 1–2 days after starting the eliciting drug for fixed drug eruption; 4–28 days after starting the eliciting drug for SJS/TEN 1–2 days after starting the eliciting drug chemokines determined in serum, plasma, urine or the involved tissue during the active phase of the reaction may be useful for the diagnosis of DHR (9, 16). For IR, tryptase and histamine are the two most studied mediators, and for NIR, the cellular analysis, including studies in skin biopsies and peripheral blood, has been also used (Table 2). Tryptase determination Tryptase is a serine protease and an important prestored proinflammatory mast cell mediator. Total tryptase is composed of an immature monomer isoform (continuously, but weakly released in serum by mast cells) and a heterotetramer mature isoform (suddenly and rapidly released upon mast cell degranulation), and it is mainly determined by immunoassay (17). Clinical studies. Mature tryptase is better related to mast cell activation. However, there are no commercial tests for the specific determination of mature tryptase only (18). Twenty-two percentage of cases with perioperative DHRs had tryptase levels >11.4 ng/ml with median levels being higher in IgE-mediated (9.0 ng/ml) compared to non-IgEmediated DHR (4.0 ng/ml) (19). In severe perioperative DHR (anaphylactic shock), tryptase levels >13.5 ng/ml were found in 66.6% of patients (20). • • • Technical recommendations. Total tryptase level can be measured in serum using a widely available commercial assay, and its measurement • Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 1105 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Mayorga et al. 1106 N.D. 518 ANAPH 271 Contr 48 37 ANAPH Contr N.I. 34 49.8 75 ANAPH 25 Contr 66 ANAPH Contr N.I. 47.4 N.D. 518 ANAPH 271 Contr 102 ANAPH Contr N.I. 36.8 18 ANAPH 20 Contr 36 34 66 ANAPH Contr N.I. 76 ANAPH 20 Contr 41 17 ANAPH 13 Contr n 362F 156M N.D. 17F 20M 55F 20M 39F 63M 38F 38M 362F 56M 12F 6M N.D. 9F 8M Sex (F/M) CH/ST CH CH/ST CH CH CH CH/ST CH/ST CH CH Methods (CH/ST/DPT) NMBA, latex, antibiotics, hypnotics, opioids, colloids N.D. AX, GEL, ATR, META, AX-CLV, LEVO, PROT, POV, CEFAZ, LAT Drug, latex Drug, food, inhalant Drug, food, insect ALC, ATR, BUP, CLORH, DIAZ, DROP, FENT, GLYC, METRO, MIDA, OXA, PANC, PETH, PROPY, SUXA, THIO, VEC NMBA, latex, antibiotics, hypnotics, opioids, colloids N.D. ATR, META, AX, CEF, Food, Idiopathic Drugs analysed RIA (yes) His>9 nM Immunotech ELISA (yes) His>10 nm/ml CAP-FEIA (yes) Tryp>11.4 ng/ml <2 <12 CAP-FEIA (yes) Tryp>12.3 lg/l CAP-FEIA (yes) Tryp>11.4 ng/ml <2 2/6/24 CAP-FEIA (yes) Tryp>2 ng/ml <2 CAP-FEIA (yes) Tryp>13.5 ng/ml 3/6/24 CAP-FEIA (yes) Tryp>25 lg/l CAP-FEIA (yes) Tryp>13.5 ng/ml <12 N.D. CAP-FEIA (yes) Tryp>8.23 ng/ml Commercialized in vitro test (Yes/No) <6 Time study (hours) 75 64 37 in ST + 6 in ST- 82.7 61.8 75 severe 55 moderate 64 66.6 30 94.1 Sens (%) 51 N.D. 94.4 96 N.D. N.D. 89.3 100 N.D. 92.3 Spec (%) 75 N.D. N.D. N.D. N.D. N.D. 92.6 N.D. N.D. N.D. NPV (%) 51 N.D. N.D. N.D. N.D. N.D. 54.3 N.D. N.D. N.D. PPV (%) † Drug ANAPH in 31/66 With a cut-off Trypt > 8.23 ng/ml, Sens = 58% † Drug ANAPH in 51/102 † Drug ANAPH in 26/76 † Drug ANAPH in 31/66 Controls patients with URT Comments Mayorga et al. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Histamine* Lin et al. (25) (PMID: 10887307) Mertes et al. (PMID: 12960536) Mertes et al. (2003) (PMID: 12960536) Stone et al. (26) (PMID: 19767073) Sala-Cunill et al. (27) (PMID: 23018683) Laroche et al. (30) (PMID: 24787350) Berroa et al. (19) (PMID: 24237068) Tryptase Enrique et al. (24) (PMID: 10435474) Lin et al. (25) (PMID: 10887307) Dybendal et al. (20) (PMID: 14616317) Paper Mean age (years) Table 2 In vitro tests to characterize the active phase of the reaction In vitro tests for drug hypersensitivity n Mean age (years) Sex (F/M) Methods (CH/ST/DPT) 50.1 55.9 N.D. 44.1 9 Pats 9 Contrs 21 Pats Contrs: N.I. 8 Pats 5 Contrs 16 Pats Contrs: N.I. Hari et al. (37) (PMID: 11591190) Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd Homey et al. (2002) (PMID: 11821900) Tapia et al. (2004) (PMID: 15316512) 11F 5M N.D. 13F 9M 5F 4M CH CH/ST CH CH/ST SULFAM, DILT, CLIND, AX, SULFAS, META, HYDANT, ACETAM, PHENY, TEICO, IBU, SPIRA, METRO, ERYT PRED, VERA, VITB, SULFAM, TRIM, INDA, ACETAM, DORZ, SIMV, LOSAR, TORA, METOL, TICLO, PG, AX, CEPH, ALLO, CARBA Nickel AX-CLV, CEFAZ, PRED, CARBA, INDA, METOL, VITB No Methods: FC, IHQ Markers: CCL27 No Methods: PCR, IHQ Markers: CCL27 <24 <24 <24 <24 <24 AX, DICL, META, AMI, IBU, AMP, PG, CARBA, HYDANT, CEFT No Methods: FC Markers: CLA, HLA-DR No Methods: PCR, ELISA Markers: IFN-c, TNF-a, IL-2, IL-4 No Methods: IHQ Markers: Eosinophils, IL-5, eotaxin, IL-8, RANTES, MCP-3 No Methods: FC Markers: HLA-DR in CD8+ Fluorometric (No) His>28 ng/ml <2 AX, GEL, ATR, META, AX-CLV, LEVO, PROT, POV, CEFAZ, LAT <24 RIA (yes) > 6 nmol/l <2 Drug, latex PROPY, AX, PHENY, CLOX, SPIRA, METRO, CAPTO, TIAZ, AX-CLV, PV IBL ELISA (yes) His>1.2 ng/ml <2 N.D. Drugs analysed Commercialized in vitro test (Yes/No) Time study (hours) N.D. N.D. N.D. N.D. N.D. N.D. 92 90.7 61 severe 35 moderate Sens (%) N.D. N.D. N.D. N.D. N.D. N.D. N.D. 1.7 N.D. Spec (%) N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. NPV (%) N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. PPV (%) Peripheral blood and skin Peripheral blood and skin Peripheral blood and skin Peripheral blood and skin Peripheral blood Peripheral blood † Drug ANAPH in 26/76 Comments In vitro tests for drug hypersensitivity 1107 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Yawalkar et al. (73) (PMID: 11112902) 76 ANAPH 36 38F CH Stone 34 Contr 38M et al. (26) (PMID: 19767073) 75 ANAPH 49.8 55F CH Laroche 25 Contr 20M et al. (30) (PMID: 24787350) 37 ANAPH 48 17F CH/ST Berroa Contr N.I. 20M et al. (19) (PMID: 24237068) Cellular phenotypical analysis in skin biopsies and/or peripheral blood 9 Pats 49 6F CH/ST/DPT Blanca et al. (49) 18 Contrs 3M (PMID: 11097307) 19 Pats 44.8 9F CH/ST/DPT Posadas 9 Contrs 10M et al. (151) (PMID: 11031349) Paper Table 2 (continued) Mayorga et al. 1108 73.1 9F 14M 17F 10M 21F 4M 35F 15M N.D. Sex (F/M) CH CH/ST/DPT CH/ST/DPT CH/ST/DPT CH Methods (CH/ST/DPT) CEF, ALLO, MEFE, DICLX, DICL, CLORH, TETRAC, ACETAM, IBU, KETO, AX, ICM, COTRI AX, CEF, AX-CLV, META, PARA, CEFAC, CEPH, IBU, SPIRA, TETRAZ, EBAST AX, CEF, AX-CLV, META, PARA, CEFAC, CEPH, IBU, SPIRA, TETRAZ, EBAST, CEF, DIPH, PHENOB, CARBA, ACEC, ALLO, METRO, NIMO AX, CEF, META, PARA, ALLO, CEPH, DIPH, CARBA, PHENOB, SPIRA COTRI, CARBA, TETRAZ, PIRO Drugs analysed <24 <24 <24 <24 <24 Time study (hours) No Methods: PCR Markers: IFN-c, TNF-a, TNF-beta No Methods: PCR, IHQ Markers: TNF-a, IFN-c, IL-4, perforin, granzyme B, CXCR3, CXCL9, CXCL10 No Methods: IHQ Markers: granulysin, FasL, granzyme B, perforin, FoxP3 No Methods: FC Markers: HLA-DR, granzyme B No Methods: FC, IHQ Markers: CLA, CD69, CD25, HLA-DR Commercialized in vitro test (Yes/No) N.D. N.D. N.D. N.D. N.D. Sens (%) N.D. N.D. N.D. N.D. N.D. Spec (%) N.D. N.D. N.D. N.D. N.D. NPV (%) N.D. N.D. N.D. N.D. N.D. PPV (%) Skin Peripheral blood and skin Peripheral blood Peripheral blood and skin Blister fluid Comments Mayorga et al. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Sensitivity, Specificity, NPV and PPV values are calculated based on all drugs tested. Data for individual drugs are not always available. F, female; M, male; CH, clinical history; ST, skin test; DPT, drug provocation test; ANAPH, anaphylaxis; URT, urticaria; CMH, contrast media hypersensitivity; N.I., not included; N.D., no data; Sens, sensitivity, Spec, specificity, NPV, negative predictive value and PPV, positive predictive value; ACEC, aceclofenac; ACETM, acetaminophen; ALCU, alcuronium; ALLO, allopurinol; AMLO, amlodipine; AMP, ampicillin; ATRA, atracurium; AX, amoxicillin; AX-CLV, amoxicillin–clavulanic acid; BUP, bupivacaine; CAPTO, captopril; CARBA, carbamazepin; CEF, cefuroxime; CEFAC, cefaclor; CEFAD, cefadroxil; CEFAZ, cefazolin; CEFT, ceftriaxone; CEPH, cephalosporin; CLIND, clindamycin; CLORH, chlorhexidine; CLOX, cloxacillin; COTRI, cotrimoxazole; DIAZ, diazepam; DICLO, diclofenac; DICLX, dicloxacillin; DILT, diltiazem; DIPH, diphenylidantoin; DORZ, dorzolamide; DROP, droperidol; EBAST, ebastine; ERYT, erythromycin; FENTA, fentanyl; GLYC, glycopyrronium bromide; HYDANT, hydantoin; IBU, ibuprofen; INDA, indapamide; KETO, ketoprofen; LAT, latex; LEVO, levofloxacin; LOSAR, losartan; MEFE, mefenamic acid; META, metamizole; METOL, metolazone; METRO, metronidazol; MIDA, midazolam; NIMO, nimodipine; NMBA, neuromuscular-blocking agents; OXA, oxazepam; PANC, pancuronium; PARA, paracetamol; PETH, pethidine; PG, penicillin G; PHENOB, phenobarbital; PHENY, phenytoin; PIRO, piroxicam; POV, povidone; PRED, prednisolone; PROPY, propyphenazone; PROT, protamine; PV, penicillin V; SIMV, simvastatin; SPIRA, spiramycin; SULFAM, sulphamethoxazole; SULFAS, sulfasalazine; SUXA, suxamethonium; TEICO, teicoplanin; TETRA, tetracaine; THIO, thiopentone; TIAZ, thiazide; TICLO, ticlopidine; TORA, torasemide; TRIM, trimethoprim; VEC, vecuronium; VERA, verapamil; VITB, Vitamin B complex. *For histamine metabolites, different cut-off levels have been used and sensitivity and specificity cannot be reliably given for anaphylaxis. Studies measuring only beta-tryptase, which is no longer available, and not total tryptase were excluded. Cell subsets, cytokines or activation markers in the skin biopsy or blood of patients have been analysed semiquantitatively only and are not included. †Study not specific for drug anaphylaxis. Cho et al. (53) (PMID: 24388722) 23 Pats Contrs: N.I. 25 Pats 14 Contrs 37.7 43.24 50 Pats 56 Contrs 27 Pats 26 Contrs 40.3 6 Pats 0 Contrs Nassif et al. (44) (PMID: 15536433) Torres et al. (48) (PMID: 16569350) Cornejo et al. (52) (PMID: 17983377) Fernandez et al. (50) (PMID: 18384452) N.D. n Mean age (years) Paper Table 2 (continued) In vitro tests for drug hypersensitivity • • • is robust and the mediator is stable at room temperature (18, 21) (LE 2+) (GR B). Because the half-life of tryptase is 90–120 min, its measurement should ideally be taken between 30–120 min after the onset of symptoms and be compared to basal levels, measured at least 24 h after the resolution of anaphylactic symptoms (17, 21, 22) (LE 2+) (GR B). The minimal clinically significant elevation of the acute total tryptase level has been suggested to be ≥20% above baseline level plus 2 lg/l, within 4 h after a symptomatic period (23) (LE 2) (GR B). The presence of mast cell disease influences basal tryptase levels (23) (LE 2+) (GR B). Clinical recommendations. Tryptase determination during the acute phase is an useful method for confirming mast cell-mediated reactions with a sensitivity ranging from 30% to 94.1% and with a specificity from 92.3% to 94.4% depending on the cut-off point (19, 20, 24–27), with higher tryptase values obtained in more severe clinical drug reactions (19, 28) (LE 2) (GR B). • Determination of histamine and its metabolites Histamine is a mediator of allergic inflammation derived from the enzymatic processing of histidine by L-histidine decarboxylase, and large amounts of this compound are stored in basophils and mast cell granules, and it is mainly determined by immunoassay (29). Clinical studies. Histamine is probably the most abundant and important mediator for acute anaphylaxis, and the sensitivity of tests using this mediator has been reported to be higher than that of tests using tryptase in nonsevere reactions (20, 30). • Technical recommendations. Because of its short half-life (20 min), blood should be collected within the first hour (19) and histamine level must be compared to baseline level (LE 2) (GR B). Histamine must be assessed in nonhaemolysed plasma that should be cooled and processed immediately (31) (LE 3) (GR B). Measurements of histamine metabolites, N-methylhistamine and N-methylimidazoleacetic acid, in urine during a 24-h period have been used as indirect methods for the determination of histamines (29) (LE 3) (GR B). Bacteria in the digestive or urinary tract and histaminerich food have been reported to increase histamine metabolite levels (32, 33) (LE 3) (GR C). • • • • Clinical recommendations. Plasma histamine has a sensitivity from 61% to 92%, and as baseline levels have high interindividual variability and intraindividual variability, this has limited its specificity from 51% to 91% (19, 25, 26, 30, 34–36). It was the reference laboratory tool to confirm anaphy- • laxis until tryptase determination became available (37) (LE 3) (GR B). Cellular analysis The clinical assessment of NIR patients can be difficult, and possible differential diagnoses must be considered. Cellular tests can be useful to assess the immunopathological response. Skin biopsies These consist of the detection and quantification of specific cell surface markers and mediators in affected skin using histology, immunohistochemistry and/or molecular biology methods. Clinical studies. In maculopapular exanthema (MPE), CD4+T cells predominate, with variable degrees of neutrophils and eosinophils (38, 39). In acute generalized exanthematic pustulosis (AGEP), histology shows spongiform subcorneal, intradermal pustule, papillary oedema and/or perivascular infiltrate with activated neutrophils by IL-8 (CXCL8), which is produced by T cells (40, 41). The histological observations in drug reaction with eosinophilia and systemic symptoms (DRESS) can be accompanied by dermal oedema. Superficial lymphocytic infiltrate formed by both CD4+ and CD8+T cells is found with a perivascular involvement, which produce IL-5 responsible for the eosinophil recruitment (42–44). Severe bullous drug reactions such as Stevens–Johnson syndrome/toxic epidermal necrolysis (SJS/TEN) are characterized by necrotic keratinocytes and vacuolization of the basement membrane zone that result in subepidermal blistering. The dermis usually shows a perivascular lymphohistiocytic infiltrate (45). Cytotoxic CD8+T cells producing high amounts of granzyme B, perforin, Fas-L and granulysin are detected (46). • • • Technical recommendations. Skin biopsy is a simple procedure; tissue can be stored for a long period and can be used to study different cell subsets and inflammatory mediators (42, 47, 48) (LE 3) (GR B). • Clinical recommendations. Although skin biopsies may not differentiate DHRs from other cutaneous diseases such as viral infections and generalized pustular psoriasis (42, 47), they are essential to differentiate from the wide spectrum of cutaneous DHRs and are especially recommended where there is a significant skin involvement, for example, in SJS/TEN, DRESS and AGEP (38, 39, 41, 43–45) (LE 2) (GR B). • Peripheral blood. Peripheral blood samples consist of the detection and quantification of different cell subsets and Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 1109 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Mayorga et al. Mayorga et al. inflammatory markers (cytokines, chemokines and adhesion molecules) by flow cytometry and/or molecular biology methods. Clinical studies. T-cell activation markers, such as HLA-DR (49), skinhoming receptors (CLA, CCR6 and CCR10) (50–52), IFN-c and TNF-a expression (53, 54), as well as cytotoxic markers (49, 55) have been shown to be elevated during the acute phase of NIR. The involvement of different cell subpopulations and inflammatory mediators depends on the clinical symptoms (49–51, 53–55). • • Technical recommendations Due to the interindividual variability, the different markers determined in sequential peripheral blood samples collected during the active phase and after resolution of the reaction should be compared intraindividually (48). Clinical recommendations. These studies can provide an indirect information about the mechanisms involved and cell trafficking when combined with the results of skin biopsies (39, 44, 49, 51, 56) (LE 3) (GR C). • Tests to identify the culprit drug These methods are based on the analysis of specific markers after the stimulation with the culprit drug or their metabolites at the resolution of the reaction. They depend on the underlying mechanism whether IgE or T cell mediated. IgE-mediated drug allergy Methods determining IgE, either soluble or bound to basophil surfaces as well as mediators released upon IgE-mediated cell activation, are used (Table 3). Specific IgE determination. This is based on the detection of drug-sIgE in serum using a solid phase functionalized with drug–carrier conjugates by immunoassay (57). The most widely used commercial method is the fluoroimmunoassay (FEIA) (ImmunoCAP Thermo-Fisher, Uppsala, Sweden), where the drug is covalently bound to poly-L-lysine (PLL). In-house radioimmunoassay (RIA) or enzymoimmunoassay (ELISA) using different carriers [human serum albumin (HSA), PLL, amino-aliphatic spacers and dendrimer structures)] (58, 59) as well as using different solid phases (cellulose, Sepharose, zeolites or silica particles) has also been used (60–63). Clinical studies. ImmunoCAP sensitivity depends on the drug involved, but is rather low and variable (0–50%) for BLs allergy (64–67) and heterogeneous for NMBA, ranging from 83% to 92% for rocuronium, 78% to 84% for morphine and 44% for suxamethonium (68–70). Moreover in • 1110 • • • • • • chlorhexidine allergy, it showed a sensitivity of 91.6% in patients with a positive ST and 100% specificity (71). ImmunoCAP to penicillin V can lead to false allergy diagnoses (72). In-house RIA has mainly been carried out with BLs. Sensitivity ranges from 42.9% to 75% and specificity from 67.7% to 83.3% for both penicillins and cephalosporins (64, 73, 74). In-house Sepharose-RIA has shown a good sensitivity for cephalosporins (74.3%) (60) and NMBA (86–88%) (75, 76) and low sensitivity for fluoroquinolones (31.6–54.5%). Sensitivity of in-house Sepharose-RIA depends on the drugs involved, clinical manifestations and total IgE levels (61, 62). False-positive results may occur through the presence of nonspecific cross-reactivity of hydrophobic IgE (77). In-house ELISA to NSAID has demonstrated sIgE to pyrazolones in 60% of patients (78), but not for diclofenac metabolites (79). The majority of these in vitro tests show high specificity, although this depends on the drugs studied and the methods used. Technical recommendations. All immunoassays have the advantages that serum samples can be stored and easily transported, and analysis can be automated although showing low sensitivity that could depend on (i) drug binding to the solid phase, (ii) carrier as part of the antigenic determinant, (iii) the density of haptens in the conjugate, (iv) the metabolites involved in the reaction, (v) time interval and (vi) the lack of positive controls availability for many drugs. In vitro drug-sIgE decreases with time (80); for this, it is recommended that the assay should not be performed after longer than 3 years following the reactions (LE 2++) (GR B). In BLs allergy, sensitivity correlates with the severity of the clinical symptoms (64) (LE 2 ). In BLs allergy, lowering the threshold from 0.35 to 0.1 kUA/l increases the sensitivity, although it also reduces specificity, particularly for cases with total IgE>200 kU/l (81, 82), and the ratio of sIgE to total IgE increases the specificity (82) (LE 3) (GR C). • • • • Clinical recommendations. ImmunoCAP is recommended for diagnosing BLs, NMBA and chlorhexidine DHR, after ST in order to avoid DPT (64–71) (LE 2+) (GR B). As ImmunoCAP is only available for a limited number of drugs, in-house tests could be used especially for some BLs and fluoroquinolones (60–62, 64, 73, 74) (LE 2) (GR C). Immunoassays, when available, should be performed before in vivo tests including ST in life-threatening reactions or in high-risk patients (7) (LE 2) (GR B). • • • Detection of sIgE to biological agents (BA). This is based on the detection of circulating BA-sIgE antibodies in serum using ImmunoCAP and in-house methods. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 19F 11M 77F 52M N.D. 54F 34M 33F 20M 54F 22M N.D. 40 41.3 N.D. 51.8 31.3 44 45.22 38.9 74 Pats 55 Contrs 290 Pats 120 Contrs 58 Pats 30 Contrs 53 Pats 20 Contrs 55 Pats 32 Contrs 76 Pats Contrs N.I. 51 Pats Contrs N.I. 44F 11M 28F 3M N.D. CH/ST/DPT CH/ST CH ST CH/ST CH/ST/DPT CH/ST/DPT ST CH/ST CH Methods (CH/ST/ DPT) CEFAC, CEFON, CEFO, CEFTA, CEFT, CEFU PIP, RUFL, PEFL, NALI, CINOX, LOME, CIPRO, NORF, OFLO CEFT, CEFO, CEFTA PROPY PG, AX, CEFU, CEFAZ PG, AX, AMP CEPHAL, CEFAM, CEFTA, CEFT, CEFU, CEFO PG, AX, CLV MORPH, TMA, TEA, SUCCI, ALCU SUXA, VEC, ALCU, PANCU, GALL Analysed drugs CAP-FEIA (yes) Seph-RIA (no) RAST (no) 401.2 Seph-RIA (no) 371 725.4 ELISA (no) CAP-FEIA (yes) CAP-FEIA (yes) CAP-FEIA (yes) RAST (yes) PAPPC RIA (no) Seph-RIA (no) RAST (no) Seph-RIA (no) RAST (no) Commercialized in vitro test (Yes/No) 652.39 N.D. 3670 252 371 N.D. Mean Time study (days) 47 74.3 54.5 58 38 BPO: 10–68; AXO: 41–53 BPO: 32; AXO: 43; BPO+AXO: 50 N.D. N.D. 100 N.D. 87 N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. BPO: 98; AXO: 98; BPO+AXO: 96 BPO: 95 AXO: 95 N.D. PAPPC RIA:94 N.D. N.D. PAPPC RIA: 97 PAPPC RIA: 97 Seph-RIA: 86 RAST SUCCI:70 RAST-ALCU:39 CEPH: 30 PENI: 10 N.D. PPV (%) N.D. N.D. NPV (%) N.D. Spec (%) Seph: 88 RAST-SUCC: 67 RAST-ALCU: 41 Sens (%) Sensitivity with ST + 96% Positive results in ST-patients Comments In vitro tests for drug hypersensitivity 1111 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Romano et al. (57) (PMID: 16164453) Antunez 2006 (71) (PMID: 16461141) Blanca et al. (62) (PMID: 11551251) Torres et al. (63) (PMID: 11551249) Sanz et al. (64) (PMID: 11929494) Himly et al. (75) (PMID: 12704373) Manfredi et al. (58) (PMID: 14713922) N.D. Sex (F/M) N.D. Immunoassays n = 83 Gueant et al. (73) (PMID: 1957994) 31 Pats Guilloux 34 Contrs et al. (72) (PMID: 1500622) 30 Pats Romano et al. (70) Contrs N.I. (PMID: 11112903) Paper No. of pats Mean age (years) Table 3 In vitro tests to identify the culprit drug in IgE-mediated drug allergy Mayorga et al. 1112 N.D. 27 Pats 513 Contrs N.D. N.D. N.D. 106F 65M 73F 41M 49.5 114 Pats 54 Contrs 11 Pats 20 Contrs N.D. 24F 14M 43.5 38 Pats 35 Contrs 171 Pats 122 Contrs 23F 11M N.D. N.D. 25 Pats 55 Contrs N.D. 1F 11M 63.6 12 Pats 10 Contrs 61 Pats 115 Contrs 30F 15M 38.5 Sex (F/M) 30 Pats 15 Contrs Mean age (years) CH/DPT CH/ST CH/ST CH/ST CH/DPT CH/ST CH/ST ST ST/DPT Methods (CH/ST/ DPT) CETUX PG, PV, AX, AMP SUXA, ROCU, MORPH MORPH MOXI, CIPRO, LEVO PG, PV, AX, AMP ROCU CHLOR PG, AX, AMP, CEPH Analysed drugs N.D. 89.1 N.D. N.D. 120 95.85 N.D. n.d 999 Mean Time study (days) CAP-FEIA (yes) CAP-FEIA (yes) CAP-FEIA (yes) PAPPC RIA (no) CAP-FEIA (yes) Seph-RIA (no) CAP-FEIA (yes) CAP-FEIA (yes) CAP-FEIA (yes) CAP-FEIA (yes) RAST (no) Commercialized in vitro test (Yes/No) 68 Severe 92 SUXA:44; ROCU:83; MORPH: 78 PAPPC: 85 66 sIgE/tIgE:43 84 31,5 ROCU:92 SUXA: 72 MORPH: 88 PHOL: 86 85 91.6 CAP: 0–25 RAST: 43–75 Sens (%) N.D. N.D. SUXA: 100 ROCU: 71 MORPH: 82 PAPPC: 93 66 sIgE/ tIgE:93 SUXA: 67; ROCU: 81; MORPH:81 PAPPC: 82 52 sIgE/ tIgE:55 SUXA: 100 ROCU: 68 MORPH: 85 PAPPC: 95 52 sIgE/tIgE:95 98 Severe 90 82.7 N.D. 77.4 N.D. 90.7 100 N.D. N.D. N.D. ROCU:93 SUXA: 100 MORPH: 100 PHOL: 100 54 N.D. N.D. CAP: 45 RAST: 38 PPV (%) N.D. CAP: 77 RAST: 81 NPV (%) 100 CAP: 83–100 RAST: 67–83 Spec (%) Pre-existing IgE specific for Gal1-3Gal Total IgE has an influence on the detection of sIgE to BL Comments Mayorga et al. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Aranda et al. (59) (PMID: 20722637) Laroche et al. (66) (PMID: 21169794) Rouzaire et al. (105) (PMID: 22091673) Vultaggio et al. (79) (PMID: 4399843) Chung et al. (80) (PMID: 2361129) Fontaine et al. (61) (PMID: 17156341) Garvey et al. (68) (PMID: 17559915) Ebo et al. (67) (PMID: 17667569) Vultaggio et al. (78) (PMID: 19400911) Paper No. of pats Table 3 (continued) In vitro tests for drug hypersensitivity 3F 11M 16F/14M 37F 21M 20F 6M 58 50.6 51.5 41 39 39 43.27 54.5 54.5 14 Pats 195 Contrs 30 Pats 50 Contrs 58 Pats 30 Contrs 26 Pats 30 Contrs 70 Pats 40 Contrs 51 Pats 56 Contrs Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 55 Pats 30 Contrs 26 Pats 43 Contrs 8 Pats 20 Contrs 5F 3M 16F 10M 23 F 32 M 35F 16M 38F 32M 5F 6M 50.6 Sex (F/M) 11 Pats 20 Contrs Mean age (years) ST/DPT CH/ST ST/DPT CH/ST/DPT ST/DPT ST/DPT ST ST CH CH Methods (CH/ST/ DPT) IOD, IOH, IOM, IOB IOXIT, IOPR, IOPA, IOH, IOB PG, AX, AXCLV, CLV PG, AX, AMP, MDM, PPL, CEFU, CEFAZ, CEFAC META META PG, AX, AMP, MDM, PPL, CEFU, CEFAZ INFLIX CETUX INFLIX Analysed drugs 6882.5 808.8 No Flow2-CAST (yes) No No Orpegen (yes) 233.6 383,5 No No N.D. 510 CAP-FEIA (yes) ELISA (no) CAP-FEIA (yes) Commercialized in vitro test (Yes/No) N.D. 1 N.D. Mean Time study (days) 62.5 46.2 - 61.5 G BP:60 G AX:52.9 G CLV: 50 54.9 48.6 42.3 50 26 71.4 27.2 Sens (%) 100 N.D. 50 - 54.5 N.D. 90 88.4 - 100 67.6 N.D. 99.4 N.D. 89 98.5 N.D. NPV (%) 85.7 93 100 93.3 90 82.1 N.D. Spec (%) N.D. 88.9 - 100 N.D. 77.7 N.D. 100 N.D. 26 33.3 N.D. PPV (%) Potential for predicting reactions at first therapy Correlation with ST Reaction after first therapy Comments In vitro tests for drug hypersensitivity 1113 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Vultaggio et al. (82) (PMID: 19951375) Mariotte et al. (81) (PMID: 21654207) Matucci et al. (83) (PMID: 23711128) BAT Sanz et al. (64) (PMID: 11929494). Gamboa et al. (101) (PMID: 12708979) Torres et al. (94) (PMID: 15544603) Gomez et al. (102) (PMID: 19400910) Torres et al. (95) (PMID: 20159266) Pinnobphun et al. (106) (PMID: 21530870) Salas et al. (107) (PMID: 23991759). Paper No. of pats Table 3 (continued) Mayorga et al. 1114 N.D. 46 50 22 Pats 34 Contrs 28 Pats 20 Contrs 8 Pats 7 Contrs Mean age (years) 7F 1M N.D. 16F 6M Sex (F/M) ST CH/DPT ST Methods (CH/ST/ DPT) ATRA CIPRO, MOXI ATRA, ROCU, SUXA, PANCU Analysed drugs 1072.5 191,8 N.D. Mean Time study (days) No No Flow2-CAST (yes) Commercialized in vitro test (Yes/No) 63 Light: 46.4 Dark: 57.1 68.18 Sens (%) 100 Light: 90 Dark: 90 100 Spec (%) 70 N.D. N.D. NPV (%) 100 N.D. N.D. PPV (%) Comments Mayorga et al. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Sensitivity, Specificity, NPV and PPV values are calculated based on all drugs tested. Data for individual drugs are not always available. CH, clinical history; ST, skin test; DPT, drug provocation test; Seph, Sepharose; N.I., not included; Sens, sensitivity, Spec, specificity, NPV, negative predictive value; and PPV, positive predictive value. ALCU, alcuronium; AMP, ampicillin; ATRA, atracurium; AX, amoxicillin; AX-CLV, amoxicillin–clavulanic acid; CEFAC, cefaclor; CEFAM, cefamandole; CEFAZ, cefazolin; CEFO, cefotaxime; CEFON, cefonicid; CEFT, ceftriaxone; CEFTA, ceftazidime; CEFU, cefuroxime; CEPH, cephalexin; CEPHAL, cephalothin; CETUX, cetuximab; CHLOR, chlorhexidine; CINOX, cinoxacin acid; CIPRO, ciprofloxacin; CLV, clavulanic acid; INFLIX, infliximab; IOB, iobitrol; IOD, iodixanol; IOH, iohexol; IOM, iomeprol; IOPA, iopamidol; IOPR, iopromide; IOXIT, ioxithalamate; LEVO, levofloxacin; LOME, lomefloxacin; MDM, minor determinants mixture; META, metamizole; MORPH, morphine; MOXI, moxifloxacin; NALI, nalidixic acid; NORF, norfloxacin; OFLO, ofloxacin; PANCU, pancuronium; PEFL, pefloxacin; PG, penicillin G, PIP, pipemidic acid; PPL, benzylpenicilloyl-polylysine; PROPY, propyphenazone; PV, penicillin V; ROCU, rocuronium; RUFL, rufloxacin; SUCCI, succinyl choline; SUXA, suxamethonium; TEA, triethylamine; TMA, trimethylamine; VEC, vecuronium. Hagau et al. (2013) (PMID: 24499278) Mayorga et al. (109) (PMID: 23183272) Uyttebroek et al. (2014) (PMID: 24961660) Paper No. of pats Table 3 (continued) In vitro tests for drug hypersensitivity Clinical studies. Cetuximab-sIgE directed against galactose-a-1,3-galactose residues (a-gal) present in the Fab portion of this antibody has been detected. Pre-existing cetuximab-sIgE, directed against a-gal, has been detected, possibly related to tick bites or other sources (83). ImmunoCAP sensitivity to cetuximab ranges from 68% to 92% and specificity from 90% to 92% depending on DHR severity (83). ELISA is useful for predicting high-grade reactions to cetuximab at first infusion (sensitivity 71.4% and specificity 82.1%) (84). Anti-infliximab IgE in ImmunoCAP has a sensitivity of 26% and a specificity of 90% (85, 86). Acute infusion reactions can co-occur with the presence of sIgE to cetuximab, rituximab, tocilizumab, natalizumab, infliximab and muromonab (83, 87–90). • • Basophil activation test. This test is based on flow cytometry with different strategies to identify basophils (antiIgE, CCR3, CRTH2 and CD203c) and to measure their activation (CD63 and CD203c) after the stimulation with the culprit drug or their metabolites. Clinical studies. • • • • Technical recommendations. High levels of IgG as well as BA in serum can interfere with the identification of BA-sIgE by ImmunoCAP (91). • • • • Clinical recommendations. BA-sIgE determination may be useful with high sensitivity and specificity (LE 2) (GR B). • Cellular tests Several functional assays try to mimic in vivo IgE-mediated cell activation and mediator release. They have the advantage that they can be performed with any injectable drug without preparing hapten–carrier conjugates; however, they require fresh blood and it is currently unclear how other medicines/treatments may affect the results. Mediator release assays (Histamine and CysLTs). These tests measure the mediator released (histamine or LTC4) in supernatant upon the cell activation with the suspected drug (92). Clinical studies. • • Histamine release assays display a poor sensitivity (50%) and PPV (30%) in BLs allergy (93), being higher for NMBA (65%) (94). Sulphidoleukotriene release assay by cellular antigen stimulation test (CAST) to BLs has a sensitivity and specificity of 47.7% and 83.3%, respectively, in patients with positive ST and 22.7% and 83.3% (95) in those with negative ST (96). Technical recommendations. • The in vitro stability of released mediators could affect the results. Clinical recommendations. • Histamine and sulphidoleukotriene release assays have too low sensitivity and specificity to be recommended for diagnosis (93–96) (LE 2 ) (GR C). • Sensitivity of basophil activation test (BAT) for penicillins ranges from 22% to 55% (67, 97) and for clavulanic acid up to 52.7%. It shows a good specificity, ranging from 79% to 96% (67, 93–99). Sensitivity of BAT to NMBA ranges from 64% to 85.7% and specificity from 93% to 100% (100–105), being especially higher for rocuronium (91.7%) (70). In IgE-mediated allergy to pyrazolones, the sensitivity ranges from 42% to 55% and specificity from 86% to 100% (106, 107). BAT to fluoroquinolones has a sensitivity ranging from 36% to 71%, depending on the drug tested, with a specificity of 90% (62, 108, 109), and a high negative predictive value (NPV) that helps to decide whether to perform DPT (110). In RCM, BAT sensitivity varies from 46% to 62%, with high specificity (88–100%), although the results do not correlate with symptom severity (111, 112). Technical recommendations. • • • • Although commercially available tests exist, BAT protocols are not standardized between different laboratories in terms of markers, procedures and drug concentrations (113). In vitro drug-sIgE decreases with time (80, 101, 107), and therefore, the assay should be performed within 3 years of the reaction (LE 2++) (GR B). Up to 10% of patients can be ‘nonresponders’, and in these cases, BAT results cannot be interpreted (113) (LE 2) (GR B). In fluoroquinolones, photodegradation may influence BAT results, especially for moxifloxacin (114) (LE 3). Clinical recommendations. • • • BAT is recommended for diagnosing BLs and NMBA DHR and can be complementary to other in vitro tests (67, 70, 97–103) (LE 2) (GR B). BAT can be recommended for diagnosing IgEmediated allergy to pyrazolones (106, 107), fluoroquinolones (62, 108–110) and RCM (111, 112) (LE 2 ) (GR C). In life-threatening reactions or in high-risk patients, BAT, when available, should be performed before in vivo tests including ST (7) (LE 2) (GR B). T-cell-mediated drug allergy There are some in vitro assays that allow determining the individual risk of DHR before drug administration although most of them are used for identifying the drug involved after the reaction has already occurred. Most in vitro tests for diagnosing NIR are not commercially Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 1115 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Mayorga et al. Mayorga et al. available, and therefore, standardization has not been possible (Table 4). HLA allele determination. The HLA genotyping is based on reverse sequence-specific oligonucleotide-polymerase chain reaction using DNA from the peripheral blood. Clinical studies. HLAB*57:01 has been found to be associated with abacavir hypersensitivity in most ethnic populations (115), and its determination has a sensitivity of 45.5–80%, a specificity of 97.6–99%, a NPV of 100% and a PPV of 55–58% (116–118). For carbamazepine-induced DHR, the most powerful association has been established with HLA-B*15:02 and SJS/TEN in Han Chinese (119), Thai (120), Indian (121) and Malaysian (122) populations. HLA-A*31:01 has also been associated with MPE/DRESS in Japanese, Han Chinese and Europeans (123, 124). HLA-B*58:01 allele is associated with relatively high risk of allopurinol-induced DRESS and SJS/TEN in Han Chinese and other ethnic populations such as Thai, Japanese, Korean and Europeans (125–130). HLA associations do not explain all cases and their screening has a low PPV, suggesting the involvement of additional factors in the mechanisms of DHR (131, 132). • • Some drugs (vancomycin, NSAIDs, RCM) may slightly enhance the proliferation even in nonsensitized individuals (143). Also, positive results do not necessarily imply an effector response because this could be due to Treg cell proliferation (144). Sensitivity and specificity depend on the clinical manifestations of the reaction, being higher in MPE, FDE, AGEP and DRESS than in SJS/TEN (145, 146). Sensitivity of lymphocyte transformation test (LTT) is higher than that of ST for diagnosing NIR (38, 139, 147). • • • Technical recommendations. Controversy exists regarding the optimal phase of the reaction to perform LTT: for SJS/TEN, higher sensitivity has been found in the acute phase and for DRESS in the resolution phase, while other studies found no differences (148, 149). Modifications to the LTT can increase its sensitivity by the use of professional antigen-presenting cells (140, 150, 151), the inclusion of drug metabolites (152), the depletion of FoxP3+ regulatory T cells (153) or the evaluation in effector cells (146, 154) (LE 3). • • Technical recommendations. To avoid DNA fragmentation that will make difficult the HLA allele determination, it is not recommended to extract the DNA kept for a long period of time. • Clinical recommendations. HLA-B*57:01 screening is recommended for abacavirinduced DHR. Its use has demonstrated a reduction in the prevalence from 12–7.5% to 3–0% in several countries (133–135) (LE 2 + +) (GR B). The Food and Drug Administration recommends screening for HLA-B*15:02 before starting the treatment with carbamazepine in at-risk patients (136) (LE 2++) (GR B). Screening for the presence of the HLA-B*58:01 allele is recommended by the American College of Rheumatology in individuals considered to be at high risk of developing allopurinol DHR (137) (LE 2++) (GR B). • • • Lymphocyte transformation test. Proliferation of drug-specific T cells from patients with DHR upon the stimulation with the suspected drug(s) is measured by the incorporation of [3H] or carboxyfluorescein diacetate succinimidyl ester (CFSE) content using flow cytometry. The latter technique enables the identification of the effector cell(s) involved. Clinical studies. The most widely studied drugs are BLs with a sensitivity and specificity ranging from 58% to 88.8% and 85% to 100%, respectively (138–142). • 1116 • • Clinical recommendations. Sensitivity and specificity are highly variable, from 27% to 88.8% and 63% to 100%, respectively, depending on the culprit drug, being higher for BLs and anticonvulsants (38, 138–142, 146–148, 155–161), and on the clinical symptoms, being higher for MPE, FDE, AGEP and DRESS (145), but of little value in SJS/TEN (146) (LE 2 ) (GR C). • Enzyme-linked immunosorbent spot assay. Enzyme-linked immunosorbent spot (ELISpot) determines the number of cells that release relevant cytokines and cytotoxic markers after their activation by the culprit drug or their metabolites (162, 163). Clinical studies. IFN-c ELISpot has been used to diagnose NIR to BLs with the sensitivity ranging from 13% to 91% (141, 142, 149, 164). Granzyme B and granulysin ELISpot assays have been used for evaluating severe cutaneous reactions (146, 154). • • Technical recommendations. Drug-reactive T cells remain detectable several years after the reaction (160, 165). This test could be appropriate for high-throughput screening and is able to detect <25 secreting cells per million peripheral blood mononuclear cells. • • Clinical recommendations. IFN-c ELISpot can be used for evaluating NIR to BLs (141, 142, 149, 164) (LE 3) (GR C). • Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 12F 15M 65 51 Pats 135 Contrs 27 SJS Pats 54 Contrs 27F 24M 66 15 Pats 33 Contrs Niihara et al. (118) (PMID: 22211527) Hung et al. (120) (PMID: 554812) Tassaneeyakul et al. (123) (PMID: 19696695) 10F 5M 50.7 8 SJS Pats 10 Contrs Mehta et al. (116) (PMID: 19915237) 13F 18M 4F 4M 22.9 10 SJS Pats 50 Contrs 55.3 3F 7M 21.8 25 Pats 175 Contrs Colombo and Gell (113) (PMID: 18256392) Locharernkul et al. (115) (PMID: 18637831) 31 SJS Pats 1822 Contrs N.D. N.D. 803 Pats 847 Contrs HLA allele Mallal et al. (111) (PMID: 18256392) CH CH CH CH/ST/DPT CH CH CH CH/ST/DPT Methods (CH/ST/DPT) ALLO ALLO ALLO CARBA CARBA CARBA ABAC ABAC Drugs analysed NI NI NI NI NI NI NI NI Time reaction (I/NI) N.D. N.D. 660 N.D. N.D. N.D. N.D. N.D. Mean time study until (days) 100 55 100 In MPE 66.6 75 100 80 45.5 Sens (%) 87.1 98.5 85.2 In MPE 87.9 100 75 99 97.6 Spec (%) 1.52 N.D. N.D. N.D. N.D. 43 94 95.5 NPV (%) 100 N.D. N.D. N.D. N.D. 100 100 61.2 PPV (%) Allele: HLAB*57:01 Main ethnics groups: Caucasian 82.8% Black 12% Allele: HLAB*57:01 Main ethnics groups: Caucasian Allele: HLAB*1502 Main ethnics groups: Thai Allele: HLAB*1502 Main ethnics groups: Indian Allele: HLA-A31 Main ethnics groups: Japanese Allele: HLAB*5801 Main ethnics groups: Han Chinese Allele: HLAB*5801 Main ethnics groups: Caucasian Allele: HLAB*5801 Main ethnics groups: Tai Comments In vitro tests for drug hypersensitivity 1117 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Lonjou et al. (121) (PMID: 18192896) 208F 595M 42 n Sex (F/M) Paper Mean age (years) Table 4 In vitro tests to identify the culprit drug in T-cell-mediated drug allergy Mayorga et al. 1118 40.26 19 Pats 28 Contrs N.D. 44.9 16F 3M 7F 5M N.D. N.D. 923 Pats 102 Contrs 10 Pats 6 Contrs 45.08 N.D. N.D. 20 Pats Contrs N.I. 12 Pats 6 Contrs 9F 3M 38 12 Pats 8 Contrs 11F 14M 56 25 Pats 57 Contrs Kang et al. (125) (PMID: 21301380) ST/DPT CH/ST CH/ST CH/DPT CH CH CH CH Methods (CH/ST/DPT) PG, AX PG, AX LID, MEP, ART, BUP, PRI, PRO, OXI, TETRA PG, COTRI, META OXYP, COTRI, PIRO, CARBA, FENB, FLUR, NORAM, SULFAD SULFAM, PHENY, CARBA ALLO ALLO Drugs analysed NI 1836 955 N.D. NI NI N.D. 30 25 N.D. N.D. N.D. NI NI NI NI Time reaction (I/NI) Mean time study until (days) 57.9 83 60 78 N.D. 44 92 64 Sens (%) 92.8 100 100 85 N.D. 63 89.5 96 Spec (%) N.D. 75 N.D. N.D. N.D. N.D. 2.06 N.D. NPV (%) N.D. 100 N.D. N.D. N.D. N.D. 99.98 N.D. PPV (%) Allele: HLAB*5801 Main ethnics groups: Caucasian Allele: HLAB*5801 Main ethnics groups: Koreans Comments Mayorga et al. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License LTT Roujeau et al. (151) (PMID: 3875565) Mauri-Hellweg et al. (152) (PMID: 7602118) Nyfeler and Pichler (142) (PMID: 9061217) Orasch et al. (153) (PMID: 10520085) Schnyder and Pichler (133) (PMID: 10718859) Luque et al. (134) (PMID: 11421918) 14F 11M 67.4 25 Pats 23 Contrs Goncalo et al. (124) (PMID: 23600531) Sex (F/M) n Mean age (years) Paper Table 4 (continued) In vitro tests for drug hypersensitivity Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 8F 1M 11F 16M 43 49.44 48 47 70 N.D. 5 Pats 3 Contrs 9 Pats 8 Contrs 27 Pats 10 Contrs 15 Pats 12 Contrs 69 Pats 22 Pats 11 Contrs N.D. 36F 33M 12F 3M 7F 3M ST CH, DPT ST CH CH/ST ST CH/ST CH Methods (CH/ST/DPT) AX INH, RIF, ETHAM, PZA ACET, CARBA, AX, MINO, PHENOB, SCOP, BROM, PHENY, TIAP, LCARBO, MEXI, LOXO, DAP, MEROP, SULT AX AX VANC, AX, CARBA, SULFAM PRED, VERA, VITB, SULFAM, TRIM, INDA, ACET, DORZ, SIMV, LOSAR, TORA, METOL, TICLO, PG, AX, CEPH, ALLO, CARBA AX, CHLORA, FENO, PHENY, CARBA, PHENOB Drugs analysed NI NI NI 4150 N.D. N.D. 75.8 NI I/NI 4700 1140 NI NI N.D. N.D. Time reaction (I/NI) NI Mean time study until (days) 68 14.9 N.D. N.D. 88.8 N.D. 75 67 Sens (%) 85 90.7 N.D. N.D. 100 N.D. 100 100 Spec (%) N.D. 9.3 N.D. N.D. N.D. N.D. N.D. N.D. NPV (%) N.D. 85.1 N.D. N.D. N.D. N.D. N.D. N.D. PPV (%) Comments In vitro tests for drug hypersensitivity 1119 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Khalil et al. (136) (PMID: 18775806) Suzuki et al. (2008) (PMID: 18583516) Rozieres et al. (137) (PMID: 19154548) 2F 3M 32.3 10 Pats 10 Contrs Sachs et al. (154) (PMID: 11994099) Beeler et al. (155) (PMID: 16461148) Rodriguez et al. (PMID: 17030251) Kano et al. (143) (PMID: 17983378) 13F 9M 55.9 21 Pats Contrs N.I. Hari et al. (37) (PMID: 23957338) Sex (F/M) n Mean age (years) Paper Table 4 (continued) Mayorga et al. 1120 2F 3M 43 47 5 Pats 3 Contrs 15 Pats 12 Contrs 6F 6M 25F 18M 8F 7M 4F 13M 55.3 52.1 44.7 49 37.1 56 12 Pats 16 Contrs 43 Pats 14 Contrs 14 Pats Contrs N.I. 17 Pats 42 Contrs 15 Pats 18 Contrs 25 Pats 20 Contrs ST CH CH/ST CH CH ST ST ST ST CH Methods (CH/ST/DPT) CEPH CARBA, SULPHO, LAMO, ALLO, OXIP, MEFE ABAC AX, NIME, ACETAM, HIDROX, ALLO, CARBA, PG, CEFAZ ALLO, AX, CARBA, CEF, MEROP, PG, VANC AX, CIPRO, CARBA AX AX VANC, AX, CARBA, SULFAM CARBA, SULPHO, LAMO, ALLO, OXIP, MEFE Drugs analysed NI NI NI 602.9 150 4890 420 NI N.D. 211.5 1140.6 4150 N.D. NI I/NI I/NI I/NI 1140 150 Time reaction (I/NI) NI Mean time study until (days) 40 33 N.D. 92 82 N.D. 91 N.D. N.D. 27 Sens (%) N/A 98 N.D. N.D. IFN-c: 83 IL-4: 92 N.D. 95 N.D. N.D. 100 Spec (%) N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. NPV (%) N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. N.D. PPV (%) Comments Mayorga et al. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 14F 11M 7F 8M N.D. N.D. 38 Pats 11 Contrs 12F 3M 7F 8M 37.1 15 Pats 18 Contrs Porebski et al. (141) (PMID: 23957338) ELISPOT Beeler et al. (155) (PMID: 16461148) Khalil et al. (136) (PMID: 18775806) Rozieres et al. (137) (PMID: 19154548) Zawodniak et al. (149) (PMID: 19793058) Polak et al. (2012) (PMID: 23106791) Fu et al. (158) (PMID: 23029066) Esser et al. (2012) (PMID: 22338581) Porebski et al. (141) (PMID: 23957338) Tanvarasethee et al. (157) (PMID: 22722755) Sex (F/M) n Mean age (years) Paper Table 4 (continued) In vitro tests for drug hypersensitivity Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 8F 7M 12F 3M 6F 6M 4F 6M 32.3 48 47 49.2 47 15 Pats 5 Contrs 15 Pats 12 Contrs 12 Pats 11 Contrs 10 Pats 5 Contrs 7F 3M Sex (F/M) 10 Pats 10 Contrs n Mean age (years) CH CH ST CH CH/ST Methods (CH/ST/DPT) ASA, AMLO, AX, ATEN, AX-CLV, BUP, CEF, CLIND, COD, DICLO, FELO, FENTA, Histafedâ, IBU, LIGNO, LORAT, META, MINO, NAPRO, PARA, PRAVA, PROPRA, Rafathricinâ, Resprimâ, Rokal â, WARF AX, SULFAM, SULFAP AX AX, AMP, VANC, CARBA, SULFAP, CEF, SULFAM, PHENY, CLV, MOXI AX, CHLORA, FENO, PHENY, CARBA, PHENOB Drugs analysed NI NI I/NI NI NI Time reaction (I/NI) 672 N.D. N.D. 538 N.D. Mean time study until (days) N.D. 80 80 N.D. IL-5: 92 IFN-c: 36 IL-10: 50 Sens (%) N.D. 62 100 IL-5: 100 IFN-c: 60 IL-10: 100 N.D. Spec (%) N.D. 44 N.D. N.D. N.D. NPV (%) N.D. 89 N.D. N.D. N.D. PPV (%) Methods: BEADS Markers: IL-2, IL-5, IL-13, IFN-c Methods: ELISA Markers: IFN-c Methods: ELISA Markers: IL-2, IL-5, IFN-c Methods: FC Markers: CD69 Methods: ELISA Comments In vitro tests for drug hypersensitivity 1121 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Lochmatter et al. (161) (PMID: 19254289) Beeler et al. (159) (PMID: 18005225) Khalil et al. (136) (PMID: 18775806) Halevy and Grossman (162) (PMID: 19160944) Cell markers and cytokine release Sachs et al. (154) (PMID: 11994099) Paper Table 4 (continued) Mayorga et al. 1122 37.1 53 Mean age (years) 7F 8M 15F 4M Sex (F/M) CH CH Methods (CH/ST/DPT) AX, CARBA, IBU, PG, VALP, AMP, CLIND, COTRI, DOXY, META, CEF, CLARI, NADR, METRO, OME, PANTO, PERCH, IODX, LAMO CARBA, SULPHO, LAMO, ALLO, OXIP, MEFE Drugs analysed NI 150 805.36 Time reaction (I/NI) NI Mean time study until (days) Granul: 60 IFN-c: 55 IL-5: 43 IL-2: 38 100 Sens (%) Granul: 96 IFN-c: 95 IL-5: 100 IL-2: 98 100 Spec (%) N.D. N.D. NPV (%) N.D. N.D. PPV (%) Methods: FC, BEADS Markers: granulysin, IL-2, IL-5, IFN-c Methods: FC, ELISA Markers: IL-5, IFN-c, IL-10 Comments Mayorga et al. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Sensitivity, Specificity, NPV and PPV values are calculated based on all drugs tested. Data for individual drugs are not always available. F, female; M, male; CH, clinical history; ST, skin test; DPT, drug provocation test; FC, flow cytometry; IHQ, immunohistochemistry; Sens, sensitivity, Spec, specificity, NPV, negative predictive value and PPV, positive predictive value; ABAC, abacavir; ACETM, acetaminophen; ALLO, allopurinol; AMLO, amlodipine; AMP, ampicillin; ART, articaine; ASA, acetylsalicylic acid; ATEN, atenolol; AX, amoxicillin; AX-CLV, amoxicillin–clavulanic acid; BROM, bromhexine; BUP, bupivacaine; CARBA, carbamazepin; CEF, cefuroxime; CEFAZ, cefazolin; CEPH, cephalosporin; CHLORA, clorazepate; CIPRO, ciprofloxacin; CLARI, clarithromycin; CLIND, clindamycin; CLV, clavulanic acid; COD, codeine phosphate; COTRI, cotrimoxazole; DAP, dapsone; DICLO, diclofenac; DORZ, dorzolamide; DOXY, doxycycline; ETHAM, ethambutol; FELO, felodipine; FENB, fenbufen; FENO, fenoterol; FENTA, fentanyl; FLUR, flurbiprofen; IBU, ibuprofen; INDA, indapamide; INH, isoniazid; IODX, iodixanol; LAMO, lamotrigine; LCARBO, L-carbocisteine; LID, lidocaine; LIGNO, lignocaine HCl; LORAT, loratadine; LOSAR, losartan; LOXO, loxoprofen sodium; MEFE, mefenamic acid; MEP, mepivacaine; MEROP, meropenem; META, metamizole; METOL, metolazone; METRO, metronidazol; MEXI, mexiletine; MINO, minocycline; MOXI, moxifloxacin; NAPRO, naproxen; NORAM, noramidopyrine; OMEP, omeprazole; OXI, oxybuprocaine; OXIP, oxipurinol; PANTO, pantoprazole; PARA, paracetamol; PERCH, Na-perchlorate; PG, penicillin G; PHENOB, phenobarbital; PHENY, phenytoin; PIRO, piroxicam; PRAVA, pravastatin; PRED, prednisolone; PRI, prilocaine; PRO, procaine; PROPRA, propranolol; PZA, pyrazinamide; RIF, rifampin; SCOP, scopolamine butylbromide; SIMV, simvastatin; SULFAD, sulfadiazine; SULFAM, sulfamethoxazole; SULFAP, sulfapyridine; SULFAS, sulfasalazine; SULPHO, sulphonamides; SULT, sultamicillin; TETRA, tetracaine; TIAP, tiaprofenic acid; TICLO, ticlopidine; TORA, torasemide; TRIM, trimethoprim; VALP, valproic acid; VANC, vancomycin; VERA, verapamil; VITB, Vitamin B complex; WARF, warfarin sodium. *No available commercialized tests. 15 Pats 18 Contrs 19 Pats 10 Contrs Martin et al. (160) (PMID: 19796221) Porebski et al. (141) (PMID: 23957338) n Paper Table 4 (continued) In vitro tests for drug hypersensitivity 44 45 52 44 44.1 141 Pats 136 Contrs 43 Pats 35 Contrs 8 Pats 18 Contrs Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 60 Pats 30 Contrs 60 Pats 30 Contrs 37F 23M 33F 27M 18F 8M 32F 11M 81F 71M N.D. 34F 21M 38 N.D. 21F 17M 39.25 40 Pats 39 Contr 38 Pat 50 Contr 55 Pats 64 Contrs No. of pats Sex (F/M) ASA, PARA, META, DICL, NAPRO ASA, PARA, META, DICL, NAPRO 42 CH 18 DPT 43 CH 17 DPT ASA ASA ASA, PARA, DICL, NAPRO, META ASA ASA, BL, ACETAM ASA, DICL, IBU, INDO Drugs analysed 3 CH 5 DPT 25CH 18 DPTNPT-BPT DPT 10 CH 29 DPT 30 ST 25 DPT CH Methods (CH/ST/ DPT/NPT) N.D. N.D. N.D. N.D. <4 <4 N.D. N.D. <24 N.D. N.D. 308 <1 N.D. 204.6 Time study (days) N.D. Time reaction (hours) No No Assay Designs (yes) Assay Designs (yes) CAST-ELISA (yes) CAST (yes) CAST-ELISA (yes) CAST-ELISA (yes) Commercialized in vitro test (Yes/No) 66.7 43.3 63% 83% 24 25 34.5 NERD: 72.7 NIUA: 100 Sens (%) 93.3 100 50% 82% 89 92.3 NERD: 96.7 NIUA: 96.7 86 Spec (%) N.D. 100 N.D. 0.79 N.D. 28.7 N.D. N.D. NPV (%) N.D. 99.4 N.D. 0.86 N.D. 90.7 N.D. N.D. PPV (%) NIUA/NERD NIUA/NERD NERD NERD NERD/NECD/ NIUA NERD N.D. NERD/NIUA Comments In vitro tests for drug hypersensitivity 1123 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License CysLT May (167) (PMID: 10520062) Lebel et al. (166) (PMID: 11421930) Bavbek et al. (173) (PMID: 19033733) De Weck et al. (164) (PMID: 19862935) 15-HETE Kowalski et al. (168) (PMID: 16076298) Korosec et al. (169) (PMID: 22015094) BAT Gamboa et al. (171) (PMID: 15347380) Sanz et al. (170) (PMID: 15608437) Paper Median age (y.o.) Table 5 In vitro tests to identify the culprit drug in nonallergic hypersensitivity to NSAIDs Mayorga et al. 1124 46.8 44 43.2 19 Pats 40 Contrs 60 Pat 20 Contrs 30 Pats 15 Contrs 18 Pats 24 Contrs 44 36 10 Pats 10 Contrs 152 Pats 165 Contrs 55 43 Pats 29 Contrs RodrıguezTrabado et al. (174) (PMID: 18534081) Celik et al. (172) (PMID: 19486029) Bavbek et al. (173) (PMID: 19494523) 27F 3M 45F 15M 24F 35M 81F 71M 14F 4M 4F 6M 24F 19M Sex (F/M) CH CH 12 CH 7 DPT CH/DPT 16 DPT 2 CH CH 33 CH 10 DPT Methods (CH/ST/ DPT/NPT) ASA, DICL, KETO, CELEC, ACETAM ASA ASA ASA, PARA, DICL, NAPRO, METAM ASA, DICL ASA ASA, PARA, META, DICL Drugs analysed N.D. <2 N.D. N.D. <1 N.D. N.D. N.D. 305 N.D. <1 N.D. <365 >365 Time study (days) <1 Time reaction (hours) No No FastImmune (yes) Flow-CAST (Yes) CD63: Flow-CAST (yes) CD203c: Cellular Analysis of Allergy (yes) No Orpegen (yes) Commercialized in vitro test (Yes/No) 60–76.7 ASA: 37 DICLO: 33 78–80 CD63: ASA: 33.3 DICLO: 16.7 CD203c: ASA: 16.7 DICLO: 22.2 Both: ASA: 33.3 DICLO: 22.2 ASA/DICLO/ NAPRO 70–75% CD63: 30 CD203c:70 42.8 Sens (%) 80 ASA: 90 50–83 CD63: ASA: 75 DICLO: 83.3 CD203c: ASA: 100 DICLO: 100 Both: ASA: 75 DICLO: 83.3 ASA/DICLO/ NAPRO 47–91% CD63: 40 CD203c:45 100 Spec (%) N.D. 64 N.D. N.D. CD63 15 CD203c 100 N.D. 100 NPV (%) N.D. 79 N.D. N.D. CD63 90 CD203c 90 N.D. 53.84 PPV (%) NERD/NECD NECD/NIUA NERD NERD/NIUA AERD AERD NIUA/NERD/ SNIUAA Comments Mayorga et al. Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License De Weck et al. (164) (PMID: 19862935) Korosec et al. (169) (PMID: 21293144) Abuaf et al. (176) (PMID: 3236474) Wismol et al. (177) (PMID: 21492991) 34 No. of pats Median age (y.o.) Paper Table 5 (continued) In vitro tests for drug hypersensitivity 46 Pats 45 Contrs Ariza et al. (178) (PMID: 24443418) Sensitivity, Specificity, NPV and PPV values are calculated based on all drugs tested. Data for individual drugs are not always available. NSAID, Nonsteroidal anti-inflammatory drugs; NIUAA, single-NSAID-induced urticaria/angioedema or anaphylaxis; AERD, aspirin-exacerbated respiratory disease; ATA, aspirin-tolerant asthmatic; NECD, NSAID-exacerbated cutaneous disease; NIUA, NSAID-induced urticaria/angioedema; NERD, NSAID-exacerbated respiratory disease; F, female; M, male; NPT, nasal provocation test; RS, respiratory symptoms; URT, urticaria; N.D., no data; Sens, sensitivity, Spec, specificity, NPV, negative predictive value and PPV, positive predictive value; ACETM, acetaminophen; ASA, acetyl salicylic acid; BL, beta-lactam; CELEC, celecoxib; DCL, diclofenac; IBU, ibuprofen; INDO, indomethacin; KETO, ketoprofen; METAM, metamizole; NAPRO, naproxen; PARA, paracetamol. NIUA N.D. N.D. No <2 5CH 41 DPT No. of pats Paper 39 26F 20M NSAIDs 803.5 100 31.1 Comments PPV (%) NPV (%) Spec (%) Sens (%) Commercialized in vitro test (Yes/No) Time study (days) Time reaction (hours) Drugs analysed Methods (CH/ST/ DPT/NPT) Sex (F/M) Median age (y.o.) Table 5 (continued) • • The determination of granzyme B and granulysin is recommended for evaluating the cytotoxic mechanisms of NIR (57, 146, 154) (LE 3) (GR C). To improve the accuracy of the test, two or more cytokines determination can be used (146, 149) (LE 3) (GR C). Cell markers and cytokine release. After in vitro drug stimulation, T cells express or up-regulate a number of surface molecules and produce different inflammatory mediators that can be detected by flow cytometry and ELISA. Clinical studies. CD69 is up-regulated early, potentially after 48–72 h, and its determination by flow cytometry correlates with LTT results for BLs, sulphamethoxazole and carbamazepine DHR (166). IFN-c, IL-10 and IL-5 measurements using ELISA in the LTT supernatant are potentially useful for diagnosis (141, 146, 159, 167–169). Combination of IL-5/IL-10/IFN-c measurements by flow cytometry in NIR showed a sensitivity of 75% (167). • • • Technical recommendations. The timing of sample collection is critical because the mediators can be secreted in transitory peaks with variations in the maintenance of detectable levels (48). Due to immunological control process, chemokines and cytokines can be degraded by proteases (170). • • Clinical recommendations. CD69 can be used in the evaluation of NIR (166) (LE 3) (GR C). Combination of IL-5/IL-10/IFN-c measurements can improve the evaluation of NIR (141, 146, 159, 167–169) (LE 3) (GR C). • • Combinations of tests. Clinical studies. The combination of granzyme B ELISpot, granulysin expression and IFN-c production can increase the sensitivity in SJS/TEN to 80% (146). Single cytokine analysis is often unhelpful – panels of cytokines using ELISpot and flow cytometry have shown a higher sensitivity (149, 167). IL-5/IL-10/IFN-c measurement by flow cytometry combined with ELISA in NIR has shown a sensitivity of 100% (167). • • • Technical recommendations. The same described above (for details, see sections ‘Lymphocyte transformation test’, ‘Enzyme-linked immunosorbent spot (ELISpot) assay’ and ‘Cell markers and cytokine release’). • Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 1125 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Mayorga et al. Mayorga et al. Figure 1 In vitro tests to determine the culprit drug based on the suspected immunological mechanism. Clinical recommendations. Because no in vitro test has high enough sensitivity, the combination of results from different assays (LTT, ELISpot, cell markers and cytokine release) can be used in evaluating NIR (146, 149, 167) (LE 3 ) (GR D). • Nonallergic hypersensitivity Most studies have been conducted with NSAID hypersensitivity, although with a lack of standardization (Table 5). Arachidonic acid metabolites determination. Cysteinyl leukotrienes and 15-HETE can be specifically released in the supernatant of NSAID-stimulated isolated human leucocytes and measured by ELISA. Clinical studies. The majority of these studies included cases with NECD and NERD, with a sensitivity ranging from 24% to 100% and with a specificity from 88% to 96.7% (164– 167). 15-HETE generation by leucocytes has been measured in NERD, showing a sensitivity from 63% to 83%, a specificity from 50% to 82%, a PPV value of 0.79 and a NPV of 0.86 (175, 176). 15-HETE generation has also been determined for other NSAIDs (naproxen, indomethacin, celecoxib) (175, 176). • • • Technical recommendations. NSAID concentrations used in the tests vary among studies: aspirin: 0.1 lg/ml and 2.5 mg/ml; diclofenac: 20 lg/ • 1126 • ml, 0.31 mg/ml, 0.08 mg/ml; ibuprofen: 20 lg/ml; indomethacin: 20 lg/ml; naproxen: 1.25 and 0.31 mg/ml; metamizol: 5 and 0.625 mg/ml; and paracetamol: 1.25 and 0.31 mg/ml (174, 177). Toxic concentrations of the drugs that cause a nonspecific response should not be used in these tests (LE 2 ) (GR C). Clinical recommendations. CysLTs or 15-HETE determinations have a limited value for diagnosing nonallergic hypersensitivity to NSAID (171–176) (LE 2 ) (GR C). • Basophil activation test. Basophil activation test has been used for evaluating NSAID hypersensitivity, mostly by analysing CD63 up-regulation and CD203c expression, although there is uncertainty regarding the underlying mechanism in basophil activation caused by NSAIDs. Clinical studies. Results using aspirin stimulation show a great variability in sensitivity and specificity, being 30–78% and 40–100% when determining CD63 expression (171, 177–185) and 16.7–70% and 45–100%, respectively, when determining CD203c (179, 180). BAT sensitivity can vary from 30% to 78% in NERD and between 37–100% for cutaneous symptoms (NECD and NIUA). Specificity varies from 40% to 83% for NERD and between 31–90% for NECD and NIUA (179–183, 185). • • Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Table 6 Overview on in vitro tests with level of evidence (LE) and grade of recommendation (GR) Tests to characterize the active phase of DHR Tryptase determination Histamine and its metabolites LE GR 2+ B 3 B Cellular phenotypical analysis in skin biopsies 2 B Cellular phenotypical analysis in peripheral blood 3 C Tests to identify the culprit drug IgE-mediated drug allergy sIgE by Immunoassay 2+ B sIgE to biological agents 2 B Histamine and CysLT release 2 C Basophil activation test 2 B T-cell-mediated drug allergy HLA allele determination 2+ B Lymphocyte transformation test 2 C Enzyme-linked immunosorbent spot assay 3 C Cell markers and cytokine release 3 C Combination of tests 3 D Nonallergic drug hypersensitivity CysLT release and 15-HETE 2 C Basophil activation test 2 C • • Basophil activation by NSAIDs especially at higher concentrations (i.e. 5 mg/ml) occurs to a variable extent in healthy individuals who tolerate NSAIDs (171, 179, 182, 185). The addition of CAST to BAT has a limited contribution in the diagnosis of NSAID hypersensitivity (171, 177, 179). Comments • • • • • • • • • • • • • • • • • • • • • • • • Determinations should be performed from 30–120 min Basal levels are required for comparisons Histamine metabolites measurement in urine within 24 h after reaction Comparison with basal levels required Useful to assess the immunopathological response Useful to assess the immunological response ImmunoCAP is validated for BL and NMBA Time interval from reaction to study is critical for sensitivity ImmunoCAP is validated for INFLIX and CETUX Pre-existing CETUX-sIgE to a-gal The in vitro stability of released mediators could affect the results It is validated for BLs and NMBA Time interval from reaction to study is critical for sensitivity HLA associations have a low PPV Additional factors may be involved Sensitivity depends on the types of reaction and drug Sensitivity decreases in severe skin reactions Analyse a few number of effector cells Sensitivity could be increased with the combination of several parameters Sensitivity could be increased with the combination of different methods and parameters Interference with patients treatments No knowledge of the cell source Interference with patients treatments No knowledge of the mechanism justifying the test Technical recommendations. Neither the use of CD203c or CD63 as activation marker, nor the addition of other NSAIDs and/or combination with CAST improved its overall sensitivity and specificity (171, 177, 179, 180, 183) (LE 2 ) (GR C). • Allergy 71 (2016) 1103–1134 © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd 1127 13989995, 2016, 8, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/all.12886 by Albania Hinari NPL, Wiley Online Library on [29/10/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity Mayorga et al. • • Mayorga et al. Basophil selection with the combination of CCR3 and CD203c in living cells can improve BAT sensitivity (185) (LE 3) (GR C). Toxic concentrations of the drugs that cause nonspecific response should not be used in these tests (LE 2 ) (GR C). Clinical recommendations. BAT has a limited value for diagnosing nonallergic hypersensitivity to NSAID mainly because of its low specificity (175, 176) (LE 2 ) (GR C). • Conclusions and unmet needs The diagnosis of DHR is complex, time-consuming, expensive and not risk-free. There are many in vitro tests that can help in the diagnosis and identification of the culprit drug (Fig. 1), but only a few of them show enough evidence for at least a grade B recommendation. These recommendations reflect current knowledge in the field, and the levels of evidence have been evaluated (Table 6). However, it should also be acknowledged that there is a lack of well-controlled studies, and in many cases, information comes from small studies with few subjects. Moreover, in many studies, patients are included based on clinical history only, which can introduce bias. Finally, but not less important, only few tests are licensed (Tables 2–5). Thus, the grades of recommendations given here are generally rather low. We have identified several unmet needs, which should be addressed in future: To validate the different protocols including sample processing, drug concentrations, drug and sample stability and standardization between laboratories. To perform studies in a large series of well-characterized patients diagnosed by ST and/or DPT when possible. To confirm the sensitivity, specificity, NPV and PPV for the in vitro tests. • • • • • • • • • To analyse the results of the in vitro tests for specific drugs and clinical symptoms. To establish how treatments affect the results of the different in vitro tests and for how long. To develop automatized systems that can be used as standard tests. To identify the immunological mechanisms involved in different types of DHR and to increase our knowledge of the drug metabolic pathways involved. To identify biological markers in serum, because this sample type allows long-term storage and transportation to reference laboratories. To develop an algorithm for understanding which is the best in vitro test approach for each patient according to the implicated drug, patient history and time elapsed since the reaction onset. Author contributions CM and MJT drafted the introduction and compiled the entire manuscript; PB, JRC, AN, JJL and MJT, the sections on DHR classification and diagnosis; KB, PR and JLG, the sections on tryptase and histamine determination; PW, CM and AR, the sections on skin biopsies and peripheral blood; PR, MIM, AR, MJT, CM, HOE and JF, the section on specific IgE determination; AV, the section on IgE to biological agents; PR and SV, the section on mediator release assays and BATs; PW, CM, JCC and MIM, the section on T-cellmediated drug allergy; GC, JM and CM, the section on nonallergic hypersensitivity to NSAID; KB, PD, AR, CM and MJT, the section on conclusions and unmet needs; all authors reviewed the entire final manuscript. 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See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License In vitro tests for drug hypersensitivity