用翻译后修改的同型素接种疫苗会诱导 CD8 T 细胞反应,从而调解抗瘤免疫
Sabaria Shah1, Katherine W Cook1, Peter Symonds1
1Scancell Ltd, Nottingham, UK.
Journal for immunotherapy of cancer
|October 19, 2023
概括
碳amylation (homocitrullination) 产生homocitrulline残留物,这些残留物刺激CD8 T细胞的反应. 这些反应有效地准瘤细胞,显示出新型抗癌疗法的前景.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物化学 生物化学
背景情况:
- 翻译后的蛋白质修饰,如碳amylation (homocitrullination),可以改变T细胞对MHC分子呈现的抗原的识别.
- 人类素化是一种非酶的反应,形成人类素 (Hcit) 残留物,发生在瘤微环境中.
- 在临床前的模型中,CD4介导的免疫反应对Hcit表观可以准瘤细胞并介导抗瘤效应.
研究的目的:
- 调查同位素的免疫性和治疗潜力.
- 评估 CD8 T 细胞对体外和体内同位素抗原的反应.
- 为了确定人体瘤中同位素素的存在.
主要方法:
- 鉴定和体外评估HLA-A2结合的同位素.
- 使用HLA-A2转基因小鼠模型进行体内免疫性和瘤治疗研究.
- 在体外细胞毒性测定和体内瘤治疗模型,以评估CD8反应.
- 对人类瘤样本进行针对性质谱分析,以检测同位素化.
主要成果:
- 来自阿尔多酶和细胞激素的homocitrullinated在体内刺激了CD8 T细胞的反应.
- 修改后的呈现出增强的HLA-A2结合,免疫诱导高激烈的CD8反应,杀死细胞.
- 在小鼠B16瘤模型中,特定于homocitrullinated aldolase的CD8反应调解了有效的抗瘤治疗,在人类瘤中检测到的表位.
结论:
- 这项研究提供了第一个证据,即homocitrullinated被MHC I类分子处理并呈现为治疗向.
- 特定于homocitrulline的CD8T细胞反应显示出开发未来抗癌疗法的潜力.
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