Epigenetic scars of CD8(+) T cell exhaustion persist after cure of chronic infection in humans.

Epigenetic scars of CD8(+) T cell exhaustion persist after cure of chronic infection in humans.
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CD8(+) T细胞耗竭的表观遗传疤痕在人类慢性感染治愈后仍然存在。

DOI:
10.1038/s41590-021-00979-1
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发表时间:
2021-08
期刊:
影响因子:
30.5
通讯作者:
Sen DR
Sen DR
中科院分区:
医学1区
文献类型:
--
作者:
Yates KB;Tonnerre P;Martin GE;Gerdemann U;Al Abosy R;Comstock DE;Weiss SA;Wolski D;Tully DC;Chung RT;Allen TM;Kim AY;Fidler S;Fox J;Frater J;Lauer GM;Haining WN;Sen DR

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T细胞衰竭是一种因慢性感染和癌症引起的功能障碍诱导状态。耗尽的CD8+ T细胞获得一种独特的表观遗传状态,但不知道在慢性感染消退后,染色质景观是固定的还是可塑的。在这里,我们表明,耗竭的表观遗传状态在很大程度上是不可逆的,即使在治疗后。对HCV和hiv特异性反应中染色质可及性的分析确定了CD8+ T细胞耗竭的核心表观遗传程序,该程序在感染消退前后仅经历有限的重塑。此外,衰竭的典型特征,包括TOX和HIF1A基因附近的超级增强子,仍然是“表观遗传上的伤痕”。因此,T细胞耗竭是一种保守的表观遗传状态,它变得固定并持续存在,不受慢性抗原刺激和炎症的影响。逆转T细胞耗竭的治疗努力可能需要新的方法来增加耗竭T细胞的表观遗传可塑性。
T cell exhaustion is an induced state of dysfunction that arises in response to chronic infection and cancer. Exhausted CD8+ T cells acquire a distinct epigenetic state, but it is not known whether that chromatin landscape is fixed or plastic following resolution of chronic infection. Here, we show that the epigenetic state of exhaustion is largely irreversible, even after curative therapy. Analysis of chromatin accessibility in HCV and HIV-specific responses identifies a core epigenetic program of exhaustion in CD8+ T cells which undergoes only limited remodeling before and after resolution of infection. Moreover, canonical features of exhaustion, including super-enhancers near the genes TOX and HIF1A, remain “epigenetically scarred”. T cell exhaustion, therefore, is a conserved epigenetic state that becomes fixed and persists independent of chronic antigen stimulation and inflammation. Therapeutic efforts to reverse T cell exhaustion may require new approaches that increase the epigenetic plasticity of exhausted T cells.
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