In:
Journal for ImmunoTherapy of Cancer, BMJ, Vol. 10, No. 9 ( 2022-09), p. e004790-
Abstract:
E6 and E7 oncoproteins are considered ideal antigens of T cell therapy for human papillomavirus (HPV)-related cancers. However, little is known about the epitopes of E6 and E7 presented by HLA-A*11:01, one of the most prevalent HLA types globally, especially in Asia. Methods We combined in silico and experimental approaches to identify endogenously processed HLA-A*11:01-restricted epitopes of HPV16 E6 and E7. The identified epitopes were then used to screen available T cell receptors (TCRs) from healthy donors through in vitro stimulation of peripheral blood mononuclear cells (PBMCs). Results E6 93-101 (TTLEQQYNK, TTL) and E7 89-97 (IVCPICSQK, IVC), two novel HLA-A*11:01-restricted T cell epitopes of HPV16, were identified to be endogenously presented on tumor cells. TTL- and IVC-specific TCRs were isolated from 11 healthy donors through in vitro stimulation of PBMC. The key TTL and IVC residues involved in TCR-pMHC interactions were mapped, and the consensus sequence was “xxLEQxYNK” and “xVxPIxxxK.” The TTL- and IVC-specific TCRs with high functional avidity were used to generate TCR-engineered T cells, specifically recognizing and killing corresponding tumor cell lines in vitro and in vivo. In addition, TTL and IVC-specific TCR-T cells also recognized and killed HPV16 + patient-derived organoids. Conclusions The HLA-A*11:01-restricted HPV16 E6/E7 epitopes and TCRs identified in this study may provide a new strategy for HPV-related cancer immunotherapy in HLA-A*11:01 + patients.
Type of Medium:
Online Resource
ISSN:
2051-1426
DOI:
10.1136/jitc-2022-004790
Language:
English
Publisher:
BMJ
Publication Date:
2022
detail.hit.zdb_id:
2719863-7
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