Elevated expression of miR-146a correlates with high levels of immune cell exhaustion markers and suppresses cellular immune function in chronic HIV-1-infected patients

Elevated expression of miR-146a correlates with high levels of immune cell exhaustion markers and suppresses cellular immune function in chronic HIV-1-infected patients
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miR-146a 表达升高与免疫细胞耗竭标志物水平升高相关,并抑制慢性 HIV-1 感染患者的细胞免疫功能

DOI:
10.1038/s41598-019-55100-2
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发表时间:
2019-12
期刊:
Sci Rep
影响因子:
--
通讯作者:
Feng Y(共同通讯)
Feng Y(共同通讯)
中科院分区:
其他
文献类型:
--
作者:
Yu T;Ju Z;Luo MQ;Hu RH;Teng Y;Xie LL;Zhong CJ;Chen L;Hou W(共同通讯);Xiong Y(共同通讯);Feng Y(共同通讯)

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免疫细胞功能衰竭是HIV-1慢性感染的一个决定性特征,表现为细胞免疫应答和共抑制受体表达失调。尽管控制免疫细胞衰竭的分子机制在很大程度上仍然未知,但免疫检查点阻断策略已经显示出在慢性感染中重振T细胞功能的鼓舞人心的潜力。在这项研究中,我们研究了109例慢性hiv -1感染患者的外周血单核细胞(PBMCs)耗竭标志物,发现它们与microRNA-146a呈正相关,而microRNA-146a与CD4+ T细胞计数呈负相关。有趣的是,在慢性HIV-1感染的pbmc中,miR-146a的体外中和表现出抗病毒细胞因子的产生以及GZMB和穿孔素的表达升高,同时降低了PD-1、CTLA-4、TIM-3和LAG-3等抑制性受体的表达。这些结果突出了miR-146a对HIV-1诱导的免疫细胞衰竭的重要性,揭示了HIV/AIDS发病机制的一个新层面,并为改进免疫干预提供了潜在的靶点。
Functional exhaustion of immune cells is a defining characteristic of HIV-1 chronic infections, exhibiting dysregulation of cellular immune responses and expression of co-inhibitory receptors. Although the molecular mechanisms controlling immune-cell exhaustion retains largely unknown, immune checkpoint blockade strategy has shown inspiring potential to reinvigorate T cell functions in chronic infections. In this study, we investigated peripheral blood mononuclear cells (PBMCs) exhaustion markers from 109 chronic HIV-1-infected patients and found they correlated positively with microRNA-146a, which was inversely correlated with CD4+ T cell count. Intriguingly,ex vivoneutralization of miR-146a in PBMCs from chronic HIV-1 infection exhibited an elevated antiviral cytokines production as well as the expression of GZMB and perforin, while simultaneously, decreased the inhibitory receptors expression such as PD-1, CTLA-4, TIM-3 and LAG-3. These results highlight the importance of miR-146a to HIV-1 induced immune cell exhaustion, and uncover a novel layer of HIV/AIDS pathogenesis and provide potential targets for improved immune intervention.
通过PD-1-PD-1配体阻滞来振兴耗尽的HIV特异性T细胞。
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