CLIN CANCER RES:针对卵巢癌TP53“热点突变”及特异性新抗原的T细胞反应

2018-11-21 MedSci MedSci原创

CLIN CANCER RES近期发表了一篇文章,评估转移性卵巢癌患者肿瘤中针对自体体细胞突变新抗原的T细胞反应。

CLIN CANCER RES近期发表了一篇文章,评估转移性卵巢癌患者肿瘤中针对自体体细胞突变新抗原的T细胞反应。

作者扩增了切除后的转移性卵巢癌病灶中的肿瘤浸润淋巴细胞(TIL),通过全外显子和转录组测序分析鉴定自体体细胞突变。在自体抗原呈递细胞中表达所有突变的新表位,然后与TIL共培养。IFNγ分泌或41BB的上调表明存在T细胞反应。研究对 7名转移性卵巢癌患者进行了评估,5名患者出现对突变新抗原显着的T细胞反应,且通过与野生型序列比较,最小表位的鉴定,人白细胞抗原(HLA)限制性因素和新抗原特异性T细胞受体等得到验证。突变的新抗原受HLA-B,-C,-DP,-DQ和/或-DR等位基因的限制,且来自每个患者独有的随机体细胞突变。作者发现两个不同患者肿瘤表达的TP53 "热点"突变(c.659A> G; p.Y220C和c.733G> A; p.G245S)均具有免疫原性。

文章最后认为,突变反应性T细胞在卵巢癌转移灶中存在充分浸润,为其作为过继细胞疗法进行后续研究提供了基础。此外,TP53 "热点"突变 - 反应性T细胞受体向外周血T细胞的转移可以作为多种肿瘤基因疗法。

原始出处:

Drew C. Deniger, Anna Pasetto, et al. T-cell Responses to TP53 “Hotspot” Mutations and Unique Neoantigens Expressed by Human Ovarian Cancers. CLIN CANCER RES. November 2018 doi: 10.1158/1078-0432.CCR-18-0573

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    2018-11-23 zhishijing
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    2018-11-23 zblhy
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    2018-11-22 kafei

    学习了谢谢

    0

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