Elevated HLA-A expression impairs HIV control through inhibition of NKG2A-expressing cells.

Elevated HLA-A expression impairs HIV control through inhibition of NKG2A-expressing cells.
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DOI:
10.1126/science.aam8825
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发表时间:
2018-01-05
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Carrington M
Carrington M
中科院分区:
其他
文献类型:
--
作者:
Ramsuran V;Naranbhai V;Horowitz A;Qi Y;Martin MP;Yuki Y;Gao X;Walker-Sperling V;Del Prete GQ;Schneider DK;Lifson JD;Fellay J;Deeks SG;Martin JN;Goedert JJ;Wolinsky SM;Michael NL;Kirk GD;Buchbinder S;Haas D;Ndung'u T;Goulder P;Parham P;Walker BD;Carlson JM;Carrington M

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高度多态性的人类白细胞抗原(HLA)基因座编码对免疫至关重要的细胞表面蛋白。HLA-A表达水平以等位基因依赖性方式变化,使等位基因特异性效应多样化,超出肽结合偏好。对来自21个队列的9763名HIV感染者的分析表明,HLA-A水平越高,对HIV的控制越差。升高的HLA-A表达提供了HLA-A衍生的信号肽的增强水平,所述信号肽特异性结合并决定HLA-E(抑制性NKG 2A自然杀伤(NK)细胞受体的配体)的表达水平。有利于NKG 2A介导的NK细胞许可的HLA-B单倍型(即,教育)加剧了高HLA-A对HIV控制的有害作用,这与NKG 2A介导的抑制损害NK细胞清除HIV感染的靶标一致。HLA-E:NKG 2A相互作用的治疗性阻断可能在HIV疾病中产生益处。
The highly polymorphic human leukocyte antigen (HLA) locus encodes cell surface proteins that are critical for immunity. HLA-A expression levels vary in an allele-dependent manner, diversifying allele-specific effects beyond peptide-binding preference. Analysis of 9763 HIV-infected individuals from 21 cohorts shows that higher HLA-A levels confer poorer control of HIV. Elevated HLA-A expression provides enhanced levels of an HLA-A–derived signal peptide that specifically binds and determines expression levels of HLA-E, the ligand for the inhibitory NKG2A natural killer (NK) cell receptor. HLA-B haplotypes that favor NKG2A-mediated NK cell licensing (i.e., education) exacerbate the deleterious effect of high HLA-A on HIV control, consistent with NKG2A-mediated inhibition impairing NK cell clearance of HIV-infected targets. Therapeutic blockade of HLA-E:NKG2A interaction may yield benefit in HIV disease.
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