PMID- 31502159 OWN - NLM STAT- MEDLINE DCOM- 20201109 LR - 20210903 IS - 1940-6029 (Electronic) IS - 1064-3745 (Linking) VI - 2055 DP - 2020 TI - HLA Class I Antigen Processing Machinery Defects in Cancer Cells-Frequency, Functional Significance, and Clinical Relevance with Special Emphasis on Their Role in T Cell-Based Immunotherapy of Malignant Disease. PG - 325-350 LID - 10.1007/978-1-4939-9773-2_15 [doi] AB - MHC class I antigen abnormalities have been shown to be one of the major immune escape mechanisms murine and human cancer cells utilize to avoid recognition and destruction by host immune system. This mechanism has clinical relevance, since it is associated with poor prognosis and/or reduced patients' survival in many types of malignant diseases. The recent impressive clinical responses to T cell-based immunotherapies triggered by checkpoint inhibitors have rekindled tumor immunologists and clinical oncologists' interest in the analysis of the human leukocyte antigen (HLA) class I antigen processing machinery (APM) expression and function in malignant cells. Abnormalities in the expression, regulation and/or function of components of this machinery have been associated with the development of resistances to T cell-based immunotherapies. In this review, following the description of the human leukocyte antigen (HLA) class I APM organization and function, the information related to the frequency of defects in HLA class I APM component expression in various types of cancer and the underlying molecular mechanisms is summarized. Then the impact of these defects on clinical response to T cell-based immunotherapies and strategies to revert this immune escape process are discussed. FAU - Seliger, Barbara AU - Seliger B AD - Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany. barbara.seliger@uk-halle.de. FAU - Ferrone, Soldano AU - Ferrone S AD - Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA. sferrone@mgh.harvard.edu. LA - eng GR - R03 CA253319/CA/NCI NIH HHS/United States PT - Journal Article PT - Review PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 RN - 0 (Biomarkers, Tumor) RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Biomarkers, Tumor/genetics/metabolism MH - Cell- and Tissue-Based Therapy MH - Gene Expression Regulation, Neoplastic MH - Histocompatibility Antigens Class I/*genetics/*metabolism MH - Humans MH - Immunotherapy MH - Neoplasms/genetics/immunology/*therapy MH - Prognosis MH - T-Lymphocytes/immunology/*transplantation MH - Tumor Escape OTO - NOTNLM OT - Antigen processing machinery OT - HLA class I OT - Immune escape OT - Immune response OT - MHC OT - Prognostic marker OT - Tumor surveillance EDAT- 2019/09/11 06:00 MHDA- 2020/11/11 06:00 CRDT- 2019/09/11 06:00 PHST- 2019/09/11 06:00 [entrez] PHST- 2019/09/11 06:00 [pubmed] PHST- 2020/11/11 06:00 [medline] AID - 10.1007/978-1-4939-9773-2_15 [doi] PST - ppublish SO - Methods Mol Biol. 2020;2055:325-350. doi: 10.1007/978-1-4939-9773-2_15.