活体活化激活GCN2通路会在代谢过程中重编程T细胞,从而提高采用细胞疗法的效果
Michael St Paul1, Samuel D Saibil1, Meghan Kates1
1Princess Margaret Cancer Center, University Health Network, Toronto, ON M5G 2C1, Canada; Department of Immunology, University of Toronto, Toronto, ON M5S 1C1, Canada.
Cell reports. Medicine
|March 9, 2024
概括
使用halofuginone激活CD8+T细胞中的氨基酸饥饿反应,可以增强它们的新陈代谢和抗瘤活性. 这种方法对癌症免疫治疗有希望,即使在耐药模型中也是如此.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 代谢途径 代谢途径
背景情况:
- 提高T细胞代谢对于有效的抗瘤免疫力至关重要.
- 准T细胞代谢为癌症免疫治疗提供了一个潜在的策略.
研究的目的:
- 研究激活氨基酸饥饿反应对CD8+T细胞代谢和抗瘤功能的影响.
- 在癌症治疗中探索GCN2激动剂halofuginone的治疗潜力.
主要方法:
- 使用GCN2主激素halofuginone对效应体CD8+T细胞进行ex vivo激活.
- 对治疗T细胞中的代谢和功能重编程的分析.
- 采用治疗T细胞转移到携带瘤的小鼠中,并与4-1BBagonist抗体进行组合治疗.
主要成果:
- 哈洛基治疗增强了CD8+ T细胞中的氧化代谢和效应器功能.
- 自和CD98-mTOR轴被确定为halofuginone作用的关键调解者.
- 采用Halofuginone治疗的T细胞转移导致小鼠显著的瘤控制和治愈反应.
- 在免疫治疗耐药的小鼠模型中,用Halofuginone治疗的T细胞与4-1BB主动抗体协同作用.
- 在用halofuginone治疗的人类CD8+T细胞中观察到类似的代谢和功能重编程.
结论:
- 激活通过GCN2激动剂藻激活氨基酸饥饿反应,可以增强CD8+T细胞代谢和抗瘤活性.
- 这一策略有望改善癌症免疫疗法,包括对当前治疗耐药的病例.
- 这些发现支持GCN2激动剂的发展,作为瘤学的新疗法.
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