Ly6a的交叉连接会在代谢上重新编程CD8T细胞,用于癌症免疫疗法
Avishai Maliah1, Nadine Santana-Magal2, Shivang Parikh3
1Department of Human Genetics and Biochemistry, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
Nature communications
|September 27, 2024
概括
慢性紫外线暴露会通过通过高Ly6a的T细胞抑制T细胞活性来阻碍癌症免疫疗法. 向高Ly6a的T细胞可以恢复T细胞功能,并改善免疫治疗耐药癌症的抗瘤反应.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 皮肤病学 皮肤病学
背景情况:
- T细胞抑制机制对于预防自身免疫性至关重要,但在癌症免疫治疗中是目标.
- 慢性紫外线 (UV) 暴露可以抑制免疫反应,可能影响癌症的发展和治疗.
- 紫外线辐射诱导免疫抑制并影响免疫治疗疗效的确切机制尚不清楚.
研究的目的:
- 研究慢性紫外线照射对黑色素瘤抗PD1免疫疗法的疗效的影响.
- 为了确定由紫外线暴露引起的免疫抑制机制,阻碍T细胞抗瘤活性.
- 探索针对已识别的抑制途径的治疗策略,以克服免疫疗法耐药性.
主要方法:
- 在注射瘤之前,患有皮下黑色素瘤的小鼠接受了慢性紫外线照射.
- 使用质细胞计和单细胞RNA测序分析了免疫反应和T细胞功能.
- 研究了Ly6a高T细胞在UV诱导的免疫抑制和抗瘤反应中的作用.
- 对抗Ly6a抗体治疗的治疗疗效在临床前模型中进行了评估.
主要成果:
- 慢性紫外线照射使小鼠对抗PD1免疫疗法产生了耐药性,与淋巴结中抑制的T细胞杀死能力有关.
- 紫外线诱导的免疫抑制是由Ly6a高T细胞的扩张介导的.
- 高Ly6a的T细胞也被瘤微环境中的1型干扰素诱导,独立于紫外线.
- 抗Ly6a抗体治疗恢复了T细胞的细胞毒性活性,通过Erk/cMyc重新编程了线粒体代谢,并抑制了耐药小鼠的瘤生长.
结论:
- 长期的紫外线暴露会产生一种免疫抑制的环境,通过诱导高Ly6a的T细胞,破坏抗PD1癌症免疫疗法.
- 高Ly6a的T细胞代表一个关键的抑制性免疫细胞群,可以向增强抗瘤免疫力.
- 向高Ly6a的T细胞提供了一个有希望的治疗策略,以克服癌症患者对现有免疫疗法的耐药性.
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