Role of TNF block genetic variants in HIV-associated sensory neuropathy in black Southern Africans

A.L. Wadley, L.M. Hendry, P.R. Kamerman, C.S.N. Chew, Patricia Price, C.L. Cherry, Z. Lombard

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    Abstract

    © 2015 Macmillan Publishers Limited All rights reserved. HIV-associated sensory neuropathy (HIV-SN) is a common neurological complication of HIV infection. The TNF block is a region within the central MHC that contains many immunoregulatory genes. Polymorphisms and haplotypes of the TNF block have been associated with increased risk of HIV-SN in Asians and whites. Here we investigated genetic associations with HIV-SN in 342 black Southern Africans (190 cases and 152 neuropathy-free controls) using single nucleotide polymorphisms (SNPs) spanning the TNF block and a set of haplotypes defined by 31 SNPs in Asian and white populations (denoted FVa). We included population-appropriate tagSNPs derived from an African population (Yoruban, YRI, HapMap) and derived extended haplotypes comprising 61 SNPs (denoted FVa-ext b). We found no association between HIV-SN and carriage of two SNPs (TNF-1031/rs1799964∗C and BAT1 (intron10)/rs9281523∗C) associated with HIV-SN in whites and Asians. Additionally, a haplotype containing TNF-1031/rs1799964∗C associated with increased risk of HIV-SN in Asians, but was not present in this African population. However, alleles of seven SNPs associated with reduced risk of HIV-SN (corrected for age, height and multiple comparisons). These were rs11796∗A, rs3130059∗G, rs2071594∗C, NFKBIL1-62/rs2071592∗A, rs2071591∗A, LTA+252/rs909253∗G, rs1041981∗C. One haplotype (FV18-ext1), not containing these alleles, was associated with increased risk of HIV-SN after correction for age, height and multiple comparisons. Our results confirm the involvement of genes in the TNF block in altering risk for HIV-SN, but genotypes critical in this African population differed from those affecting HIV-SN in whites and Asians. These differences support the need for genetic association studies in diverse populations.
    Original languageEnglish
    Pages (from-to)363-368
    JournalEuropean Journal of Human Genetics
    Volume23
    Issue number3
    DOIs
    Publication statusPublished - 2015

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    Wadley, A. L., Hendry, L. M., Kamerman, P. R., Chew, C. S. N., Price, P., Cherry, C. L., & Lombard, Z. (2015). Role of TNF block genetic variants in HIV-associated sensory neuropathy in black Southern Africans. European Journal of Human Genetics, 23(3), 363-368. https://doi.org/10.1038/ejhg.2014.104