黑色素瘤中长链非编码RNA衍生的免疫原性肽的系统鉴定
Systematic identification of lincRNA-derived immunogenic peptides in melanoma.
作者信息
Dupré Emilie, Guiho Amélie, Beauvais Tiffany, Labous Léna, Cardon Tristan, Bertolotto Corine, Khammari Amir, Quéreux Gaelle, Salzet Michel, Labarrière Nathalie, Rabu Catherine, Lang François
机构信息
INCIT, INSERM 1302, Labex IGO, Universitéd'Angers, Nantes Université, Nantes, France.
U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, Univ. Lille, Inserm, CHU Lille, Lille, France.
出版信息
Oncoimmunology. 2025 Dec;14(1):2538684. doi: 10.1080/2162402X.2025.2538684. Epub 2025 Aug 2.
The search for reliable shared tumor-specific antigens (TSAs) to improve cancer immunotherapy is on-going. The so-called non-coding regions of the genome have recently been shown to give rise to immunogenic peptides, including the melanoma-specific antigen MELOE-1 which is translated from the long intergenic non-coding RNA (lincRNA) in an IRES-dependent manner. Here, we present a strategy to systematically identify tumor-specific antigens produced by ORFs within lincRNAs with IRES-like upstream structures. We provide evidence suggesting that in the melanocytic lineage a significant proportion of the selected lincRNAs can produce immunogenic peptides. T cell repertoires against some of these peptides were found in peripheral blood mononuclear cells (PBMCs) from healthy donors and melanoma patients, and in tumor-infiltrating lymphocytes (TILs) from metastatic melanoma patients. Finally, CD8+ T cell lines from melanoma patients specific for three of the characterized HLA-A *0201 epitopes could recognize melanoma cell lines, which were enhanced by reticular stress. Thus, these peptides may represent a new class of shared TSAs in melanoma and are attractive candidates for evaluation as targets for immunotherapy in preclinical studies. In addition, our selection strategy has the potential to identify new lincRNA-derived antigens in other cancers.
寻找可靠的共享肿瘤特异性抗原(TSA)以改善癌症免疫疗法的工作正在进行中。基因组的所谓非编码区域最近已被证明可产生免疫原性肽,包括黑色素瘤特异性抗原MELOE-1,它以IRES依赖的方式从长链基因间非编码RNA(lincRNA)翻译而来。在此,我们提出一种策略,用于系统地鉴定由具有类似IRES上游结构的lincRNA内的开放阅读框(ORF)产生的肿瘤特异性抗原。我们提供的证据表明,在黑素细胞谱系中,很大一部分选定的lincRNA可产生免疫原性肽。在健康供体和黑色素瘤患者的外周血单核细胞(PBMC)以及转移性黑色素瘤患者的肿瘤浸润淋巴细胞(TIL)中发现了针对其中一些肽的T细胞库。最后,来自黑色素瘤患者的针对三种已鉴定的HLA-A *0201表位的CD8 + T细胞系能够识别黑色素瘤细胞系,网状应激可增强这种识别。因此,这些肽可能代表黑色素瘤中一类新的共享TSA,并且是临床前研究中作为免疫治疗靶点进行评估的有吸引力的候选物。此外,我们的选择策略有可能在其他癌症中鉴定出新的lincRNA衍生抗原。