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DEFB1 polymorphisms and HIV-1 mother-to-child transmission in Zambian population.

PubMed

Zupin, Luisa; Polesello, Vania; Segat, Ludovica; Kamada, Anselmo Jiro; Kuhn, Louise; Crovella, Sergio

Human Beta Defensin-1 (hBD-1) is a component of the innate immune system, the first line of defence against pathogens, already reported as involved in the susceptibility to HIV-1 infection and HIV-1 mother-to-child transmission (MTCT) in different populations. We investigated the role of DEFB1 gene (encoding for hBD-1) functional polymorphisms in the susceptibility to HIV-1 MTCT in a population from Zambia. Four selected polymorphisms within DEFB1 gene, three at the 5' untranslated region (UTR), namely G > A (rs), C > G (rs) and G > A (rs) and one in the 3'UTR, c.*87A > G (rs), were genotyped in HIV-1 positive mothers (26 transmitters % and 75 not transmitters %) and infants born to HIV-1 infected mothers (85 HIV-1 positive % and exposed but not infected %). DEFB1 c.*A allele was more frequent among HIV- children with respect to HIV+ (with intrauterine MTCT). Concerning DEFB1 haplotypes, GCGA haplotype resulted more represented in HIV- than HIV+ infants and DEFB1 ACGG haplotype presented increased frequency in HIV- children respect to HIV+ (with intra-partum MTCT) (p = , p =  and p =