KIR3DL1-Negative CD8 T Cells and KIR3DL1-Negative Natural Killer Cells Contribute to the Advantageous Control of Early Human Immunodeficiency Virus Type 1 Infection in HLA-B Bw4 Homozygous Individuals

Frontiers in Immunology
Xin ZhangBin Su

Abstract

Bw4 homozygosity in human leukocyte antigen class B alleles has been associated with a delayed acquired immunodeficiency syndrome (AIDS) development and better control of human immunodeficiency virus type 1 (HIV-1) viral load (VL) than Bw6 homozygosity. Efficient CD8 T cell and natural killer (NK) cell functions have been described to restrain HIV-1 replication. However, the role of KIR3DL1 expression on these cells was not assessed in Bw4-homozygous participants infected with HIV-1 CRF01_A/E subtype, currently the most prevalent subtype in China. Here, we found that the frequency of KIR3DL1-expressing CD8 T cells of individuals homozygous for Bw6 [1.53% (0-4.56%)] was associated with a higher VL set point (Spearman rs = 0.59, P = 0.019), but this frequency of KIR3DL1+CD8+ T cells [1.37% (0.04-6.14%)] was inversely correlated with CD4 T-cell count in individuals homozygous for Bw4 (rs = -0.59, P = 0.011). Moreover, CD69 and Ki67 were more frequently expressed in KIR3DL1-CD8+ T cells in individuals homozygous for Bw4 than Bw6 (P = 0.046 for CD69; P = 0.044 for Ki67), although these molecules were less frequently expressed in KIR3DL1+CD8+ T cells than in KIR3DL1-CD8+ T cells in both groups (all P < 0.05). KIR3DL1-CD8+ T cells hav...Continue Reading

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Citations

Jan 11, 2020·Frontiers in Immunology·Bin SuChristiane Moog

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Methods Mentioned

BETA
Genotyping
Flow Cytometry
Enzyme-Linked Immunosorbent Spot
PCR

Software Mentioned

FlowJo
GraphPad
GraphPad Prism

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