Department of Infectious Diseases and Microbiology, University of Pittsburgh School of Public Health, Pittsburgh, PA.
Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA.
J Immunol. 2024 May 15;212(10):1564-1578. doi: 10.4049/jimmunol.2300672.
HIV-1 infection greatly alters the NK cell phenotypic and functional repertoire. This is highlighted by the expansion of a rare population of FcRγ- NK cells exhibiting characteristics of traditional immunologic memory in people with HIV (PWH). Although current antiretroviral therapy (ART) effectively controls HIV-1 viremia and disease progression, its impact on HIV-1-associated NK cell abnormalities remains unclear. To address this, we performed a longitudinal analysis detailing conventional and memory-like NK cell characteristics in n = 60 PWH during the first 4 y of ART. Throughout this regimen, a skewed repertoire of cytokine unresponsive FcRγ- memory-like NK cells persisted and accompanied an overall increase in NK surface expression of CD57 and KLRG1, suggestive of progression toward immune senescence. These traits were linked to elevated serum inflammatory biomarkers and increasing Ab titers to human CMV, with human CMV viremia detected in approximately one-third of PWH at years 1-4 of ART. Interestingly, 40% of PWH displayed atypical NK cell subsets, representing intermediate stages of NK-poiesis based on single-cell multiomic trajectory analysis. Our findings indicate that NK cell irregularities persist in PWH despite long-term ART, underscoring the need to better understand the causative mechanisms that prevent full restoration of immune health in PWH.
HIV-1 感染极大地改变了 NK 细胞的表型和功能谱。在 HIV 感染者(PWH)中,FcRγ-NK 细胞的罕见群体扩增突出了这一点,这些细胞表现出传统免疫记忆的特征。尽管目前的抗逆转录病毒疗法(ART)有效地控制了 HIV-1 病毒血症和疾病进展,但它对 HIV-1 相关的 NK 细胞异常的影响仍不清楚。为了解决这个问题,我们进行了一项纵向分析,详细描述了 n = 60 名 PWH 在接受 ART 的头 4 年中常规和记忆样 NK 细胞的特征。在整个治疗过程中,一种偏向于细胞因子无反应性的 FcRγ-记忆样 NK 细胞的谱系持续存在,并伴有 NK 表面 CD57 和 KLRG1 的总体增加,表明向免疫衰老进展。这些特征与血清炎症生物标志物的升高和针对人类巨细胞病毒(CMV)的抗体滴度增加有关,在接受 ART 的第 1-4 年,大约有三分之一的 PWH 检测到人类 CMV 病毒血症。有趣的是,40%的 PWH 表现出非典型的 NK 细胞亚群,这代表了基于单细胞多组学轨迹分析的 NK 细胞生成的中间阶段。我们的研究结果表明,尽管接受了长期的 ART,PWH 中的 NK 细胞异常仍然存在,这突显了需要更好地理解导致 PWH 无法完全恢复免疫健康的因果机制。
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