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TOX2与TET2协调,以积极调节人类CAR T细胞中的中央记忆分化
Sierra M Collins1, Katherine A Alexander1, Stefan Lundh2
1Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Science advances
|July 19, 2023
概括
减少TET2基因可以促进中央记忆T细胞 (TCM),这对CAR T细胞治疗至关重要. 失去TET2会增加TOX2的表达,增强TCM的分化,并可能提高癌症治疗的疗效.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞疗法 细胞疗法
背景情况:
- 化学抗原受体 (CAR) T细胞疗法对血液性恶性瘤有希望,但受到T细胞枯竭 (TEX) 的阻碍.
- T细胞耗尽以牺牲中央记忆T细胞 (TCM) 为代价,这些T细胞对于持续的抗瘤反应至关重要.
- TEX与表观遗传调节剂有关,包括TET2,它影响T细胞分化和功能.
研究的目的:
- 调查TET2及其下游目标TOX和TOX2在CAR T细胞耗尽和中央记忆区分中的作用.
- 探索调节TET2,TOX或TOX2表达的潜力,以提高CAR T细胞治疗的疗效.
主要方法:
- 对白血病患者实现完全缓解的TET2基因减少的分析.
- 在TET2损失后对TOX和TOX2的染色质可访问性和基因表达的评估.
- 在T细胞中对TOX和TOX2进行实验性操纵 (敲击),以评估对TCM分化和增殖的影响.
- 对TCM基因特征和TOX2与基因促进体结合的分析.
主要成果:
- 在一个病例中,TET2的减少与TCM分化增加相关.
- 失去TET2增加了染色质可访问性和TOX2的表达,这是一个疲劳调节器.
- 淘汰TOX增加了TCM百分比,而淘汰TOX2意外降低了TCM百分比和扩散.
- 发现TOX2与TCM基因的促进体结合,这表明它在它们的调节中起作用.
结论:
- 人类TOX2,不同于耗尽调节器TOX,作为CAR T细胞中央记忆区分的增强剂.
- 调节TOX2表达可能提供一种治疗策略,通过增强TCM群体来改善CAR T细胞癌症治疗.
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