PMID- 37063883 OWN - NLM STAT- MEDLINE DCOM- 20230418 LR - 20230424 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 14 DP - 2023 TI - Challenges and opportunities in analyzing and modeling peptide presentation by HLA-II proteins. PG - 1107266 LID - 10.3389/fimmu.2023.1107266 [doi] LID - 1107266 AB - The human leukocyte antigen (HLA) proteins are an indispensable component of adaptive immunity because of their role in presenting self and foreign peptides to T cells. Further, many complex diseases are associated with genetic variation in the HLA region, implying an important role for specific HLA-presented peptides in the etiology of these diseases. Identifying the specific set of peptides presented by an individual's HLA proteins in vivo, as a whole being referred to as the immunopeptidome, has therefore gathered increasing attention for different reasons. For example, identifying neoepitopes for cancer immunotherapy, vaccine development against infectious pathogens, or elucidating the role of HLA in autoimmunity. Despite the tremendous progress made during the last decade in these areas, several questions remain unanswered. In this perspective, we highlight five remaining key challenges in the analysis of peptide presentation and T cell immunogenicity and discuss potential solutions to these problems. We believe that addressing these questions would not only improve our understanding of disease etiology but will also have a direct translational impact in terms of engineering better vaccines and in developing more potent immunotherapies. CI - Copyright (c) 2023 ElAbd, Bacher, Tholey, Lenz and Franke. FAU - ElAbd, Hesham AU - ElAbd H AD - Institute of Clinical Molecular Biology, University of Kiel, Kiel, Germany. FAU - Bacher, Petra AU - Bacher P AD - Institute of Clinical Molecular Biology, University of Kiel, Kiel, Germany. AD - Institute of Immunology, University of Kiel, Kiel, Germany. FAU - Tholey, Andreas AU - Tholey A AD - Proteomics & Bioanalytics, Institute for Experimental Medicine, University of Kiel, Kiel, Germany. FAU - Lenz, Tobias L AU - Lenz TL AD - Research Unit for Evolutionary Immunogenomics, Department of Biology, University of Hamburg, Hamburg, Germany. FAU - Franke, Andre AU - Franke A AD - Institute of Clinical Molecular Biology, University of Kiel, Kiel, Germany. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230329 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 0 (Histocompatibility Antigens Class I) RN - 0 (HLA Antigens) RN - 0 (Peptides) RN - 0 (Histocompatibility Antigens Class II) SB - IM MH - Humans MH - *Histocompatibility Antigens Class I MH - *HLA Antigens MH - Peptides MH - Histocompatibility Antigens Class II/metabolism MH - T-Lymphocytes PMC - PMC10090296 OTO - NOTNLM OT - HLA-II & autoimmunity OT - TCR - T cell receptor OT - immunogenicitiy OT - immunotherapy OT - mass-spectrometry (MS) based immunopeptidomics OT - neoantigen COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/04/18 06:00 MHDA- 2023/04/18 06:42 PMCR- 2023/01/01 CRDT- 2023/04/17 03:35 PHST- 2022/11/24 00:00 [received] PHST- 2023/03/13 00:00 [accepted] PHST- 2023/04/18 06:42 [medline] PHST- 2023/04/17 03:35 [entrez] PHST- 2023/04/18 06:00 [pubmed] PHST- 2023/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2023.1107266 [doi] PST - epublish SO - Front Immunol. 2023 Mar 29;14:1107266. doi: 10.3389/fimmu.2023.1107266. eCollection 2023.