PMID- 28529511 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20191120 IS - 1664-3224 (Print) IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 8 DP - 2017 TI - Characterization of CD4 T Cell Epitopes of Infliximab and Rituximab Identified from Healthy Donors. PG - 500 LID - 10.3389/fimmu.2017.00500 [doi] LID - 500 AB - The chimeric antibodies anti-CD20 rituximab (Rtx) and anti-TNFalpha infliximab (Ifx) induce antidrug antibodies (ADAs) in many patients with inflammatory diseases. Because of the key role of CD4 T lymphocytes in the initiation of antibody responses, we localized the CD4 T cell epitopes of Rtx and Ifx. With the perspective to anticipate immunogenicity of therapeutic antibodies, identification of the CD4 T cell epitopes was performed using cells collected in healthy donors. Nine T cell epitopes were identified in the variable chains of both antibodies by deriving CD4 T cell lines raised against either Rtx or Ifx. The T cell epitopes often exhibited a good affinity for human leukocyte antigen (HLA)-DR molecules and were part of the peptides identified by MHC-associated peptide proteomics assay from HLA-DR molecules of dendritic cells (DCs) loaded with the antibodies. Two-third of the T cell epitopes identified from the healthy donors stimulated peripheral blood mononuclear cells from patients having developed ADAs against Rtx or Ifx and promoted the secretion of a diversity of cytokines. These data emphasize the predictive value of evaluating the T cell repertoire of healthy donors and the composition of peptides bound to HLA-DR of DCs to anticipate and prevent immunogenicity of therapeutic antibodies. FAU - Hamze, Moustafa AU - Hamze M AD - CEA-Saclay, Institut de Biologie et Technologies, Universite Paris-Saclay, Gif sur Yvette, France. FAU - Meunier, Sylvain AU - Meunier S AD - CEA-Saclay, Institut de Biologie et Technologies, Universite Paris-Saclay, Gif sur Yvette, France. FAU - Karle, Anette AU - Karle A AD - Novartis Pharma AG, Basel, Switzerland. FAU - Gdoura, Abdelaziz AU - Gdoura A AD - CEA-Saclay, Institut de Biologie et Technologies, Universite Paris-Saclay, Gif sur Yvette, France. FAU - Goudet, Amelie AU - Goudet A AD - CEA-Saclay, Institut de Biologie et Technologies, Universite Paris-Saclay, Gif sur Yvette, France. FAU - Szely, Natacha AU - Szely N AD - INSERM UMR 996, Faculte de Pharmacie, Universite Paris-Sud, Chatenay Malabry, France. FAU - Pallardy, Marc AU - Pallardy M AD - INSERM UMR 996, Faculte de Pharmacie, Universite Paris-Sud, Chatenay Malabry, France. FAU - Carbonnel, Franck AU - Carbonnel F AD - Service de gastro-enterologie, Hopitaux Universitaires Paris-Sud, Le Kremlin-Bicetre, France. FAU - Spindeldreher, Sebastian AU - Spindeldreher S AD - Novartis Pharma AG, Basel, Switzerland. FAU - Mariette, Xavier AU - Mariette X AD - INSERM UMR 1184, Assistance Publique-Hopitaux de Paris, Service de Rhumatologie, Hopitaux Universitaires Paris-Sud, Universite Paris-Sud, Le Kremlin-Bicetre, France. FAU - Miceli-Richard, Corinne AU - Miceli-Richard C AD - INSERM UMR 1184, Assistance Publique-Hopitaux de Paris, Service de Rhumatologie, Hopitaux Universitaires Paris-Sud, Universite Paris-Sud, Le Kremlin-Bicetre, France. FAU - Maillere, Bernard AU - Maillere B AD - CEA-Saclay, Institut de Biologie et Technologies, Universite Paris-Saclay, Gif sur Yvette, France. LA - eng PT - Journal Article DEP - 20170505 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 PMC - PMC5418239 OTO - NOTNLM OT - CD4 T cell epitopes OT - MHC-associated peptide proteomics OT - antidrug antibody OT - healthy donors OT - immunogenicity OT - infliximab OT - rituximab OT - therapeutic antibodies EDAT- 2017/05/23 06:00 MHDA- 2017/05/23 06:01 PMCR- 2017/01/01 CRDT- 2017/05/23 06:00 PHST- 2017/02/12 00:00 [received] PHST- 2017/04/11 00:00 [accepted] PHST- 2017/05/23 06:00 [entrez] PHST- 2017/05/23 06:00 [pubmed] PHST- 2017/05/23 06:01 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2017.00500 [doi] PST - epublish SO - Front Immunol. 2017 May 5;8:500. doi: 10.3389/fimmu.2017.00500. eCollection 2017.