Impact of polymorphisms in the HCP5 and HLA-C, and ZNRD1 genes on HIV viral load

Lise Wegner Thørner, Christian Erikstrup, Lene Holm Harritshøj, Margit Hørup Larsen, Gitte Kronborg, Court Pedersen, Carsten Schade Larsen, Gitte Pedersen, Jan Gerstoft, Niels Obel, Henrik Ullum

5 Citationer (Scopus)

Abstract

AIMS: Single nucleotide polymorphisms (SNPs) in the human leucocyte antigen (HLA) complex P5 (HCP5), HLA-C, and near the zinc ribbon domain containing 1 (ZNRD1) have been shown to influence viral load (VL) set point in HIV-infected individuals with a known seroconversion onset. We aimed to determine the influence of HCP5 rs2395029, HLA-C rs9264942, and ZNRD1 rs3869068 on VL in antiretroviral-naïve individuals and on time to the first VL < 51 copies/ml and on CD4+ T-cell recovery after initiation of combination antiretroviral therapy (cART). Material and methods: We genotyped the rs2395029 (A > C), rs9264942 (T > C), and rs3869068 (C > T) SNPs in 1897 Caucasians from The Danish HIV Cohort Study - a prospective, nationwide, population-based study of HIV-infected individuals in Denmark. General linear models evaluated the effect of SNPs on VL in antiretroviral-naïve individuals 0-18 months after diagnosis and on CD4+ T-cell recovery during cART. Cox proportional hazard regression analysis assessed the association with time to first VL < 51 copies/ml. All models were assuming additive genetic effects. Results: The rs2395029, rs9264942, and rs3869068 minor alleles were associated with lower VL in antiretroviral-naïve individuals (rs2395029: [mean VL (copies/ml)], A/A: 70,795 [61,660-79,433], A/C: 33,884 [19,498-58,884], P = 0.002; rs9264942: TT: 81,283 [67,608-97,724], T/C: 63,096 [54,954-75,858], CC: 38,905 [25,119-58,884], P < 0.0001; rs3869068, CC: 72,444 [63,096-83,176], C/T: 45,709 [33,113-64,565], TT: 58,884 [20,417-169,824], P = 0.01). Moreover, the C-alleles of rs2395029 and rs9264942 were associated with shorter time to VL < 51 copies/ml: (HR [95% confidence interval], 1.67 [1.09-1.72], P = 0.008; 1.16 [1.06-1.28], P = 0.002; 1.30 [1.08-1.53], P = 0.005, respectively, adjusted for last VL before cART). None of the SNPs predicted CD4+ T-cell recovery during cART. Conclusions: The minor alleles of rs2395029, rs9264942, and rs3689068 associate with lower VL among antiretroviral-naïve individuals and with shorter time to first VL < 51 copies/ml during cART even after adjustment for VL before cART.

OriginalsprogEngelsk
TidsskriftInfection, Genetics and Evolution
Vol/bind41
Sider (fra-til)185-190
Antal sider6
ISSN1567-1348
DOI
StatusUdgivet - 1 jul. 2016

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