人类白细胞抗原
细胞毒性T细胞
免疫疗法
生物
抗原
免疫学
腺癌
表位
T细胞
癌症研究
免疫系统
遗传学
癌症
体外
作者
Ben Nicholas,Alistair Bailey,Katy J. McCann,Oliver Wood,Robert J. Walker,Robert A. Parker,Nicola Ternette,Tim Elliott,Timothy J. Underwood,Peter Johnson,Paul Skipp
出处
期刊:Immunology
[Wiley]
日期:2022-10-19
卷期号:168 (3): 420-431
被引量:3
摘要
Oesophageal adenocarcinoma (OAC) has a relatively poor long-term survival and limited treatment options. Promising targets for immunotherapy are short peptide neoantigens containing tumour mutations, presented to cytotoxic T-cells by human leucocyte antigen (HLA) molecules. Despite an association between putative neoantigen abundance and therapeutic response across cancers, immunogenic neoantigens are challenging to identify. Here we characterized the mutational and immunopeptidomic landscapes of tumours from a cohort of seven patients with OAC. We directly identified one HLA-I presented neoantigen from one patient, and report functional T-cell responses from a predicted HLA-II neoantigen in a second patient. The predicted class II neoantigen contains both HLA I and II binding motifs. Our exploratory observations are consistent with previous neoantigen studies in finding that neoantigens are rarely directly observed, and an identification success rate following prediction in the order of 10%. However, our identified putative neoantigen is capable of eliciting strong T-cell responses, emphasizing the need for improved strategies for neoantigen identification.
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