Mitochondrial Functions Are Compromised in CD4 T Cells From ART-Controlled PLHIV.

Mitochondrial Functions Are Compromised in CD4 T Cells From ART-Controlled PLHIV.
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线粒体功能在ART控制的PLHIV的CD4 T细胞中受到损害。

DOI:
10.3389/fimmu.2021.658420
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发表时间:
2021
影响因子:
7.3
通讯作者:
Yao ZQ
Yao ZQ
中科院分区:
医学2区
文献类型:
--
作者:
Zhao J;Schank M;Wang L;Li Z;Nguyen LN;Dang X;Cao D;Khanal S;Nguyen LNT;Thakuri BKC;Ogbu SC;Lu Z;Wu XY;Morrison ZD;Gazzar ME;Liu Y;Zhang J;Ning S;Moorman JP;Yao ZQ

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HIV/AIDS的标志是CD4 T细胞的逐渐耗尽。尽管通过抗逆转录病毒疗法(ART)进行了有效控制,但仍有相当一部分艾滋病毒感染者(PLHIV)未能实现完全的免疫重建,被视为免疫无应答者(INR)。在PLHIV中不完全的CD4 T细胞恢复的潜在机制仍不清楚。在这项研究中,来自PLHIV的CD4 T细胞进行了表型分析和功能表征,重点是它们的线粒体功能。结果表明,虽然总的CD4 T细胞减少,但在PLHIV中,特别是在INR中,循环细胞扩增。HIV-INR CD4 T细胞更加活化,表现出耗尽和衰老的表型,线粒体功能受损。转录谱和流式细胞术分析显示,线粒体转录因子A(mtTFA)在CD4 T细胞PLHIV显着的抑制,导致异常的线粒体和T细胞的稳态。这些结果证明了T细胞过度活化、增殖、耗竭、衰老、凋亡和耗竭的顺序细胞范例,其与受损的线粒体功能相关。因此,重建mtTFA途径可能提供一种免疫学方法,以恢复ART治疗的PLHIV中的CD4 T细胞,特别是在INR中。
The hallmark of HIV/AIDS is a gradual depletion of CD4 T cells. Despite effective control by antiretroviral therapy (ART), a significant subgroup of people living with HIV (PLHIV) fails to achieve complete immune reconstitution, deemed as immune non-responders (INRs). The mechanisms underlying incomplete CD4 T cell recovery in PLHIV remain unclear. In this study, CD4 T cells from PLHIV were phenotyped and functionally characterized, focusing on their mitochondrial functions. The results show that while total CD4 T cells are diminished, cycling cells are expanded in PLHIV, especially in INRs. HIV-INR CD4 T cells are more activated, displaying exhausted and senescent phenotypes with compromised mitochondrial functions. Transcriptional profiling and flow cytometry analysis showed remarkable repression of mitochondrial transcription factor A (mtTFA) in CD4 T cells from PLHIV, leading to abnormal mitochondrial and T cell homeostasis. These results demonstrate a sequential cellular paradigm of T cell over-activation, proliferation, exhaustion, senescence, apoptosis, and depletion, which correlates with compromised mitochondrial functions. Therefore, reconstituting the mtTFA pathway may provide an adjunctive immunological approach to revitalizing CD4 T cells in ART-treated PLHIV, especially in INRs.
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