Objective: Despite multiple and repeated exposures to HIV-1, some individuals possess no detectable HIV genome and show T-cell memory responses to the viral antigens. HIV-1-reactive mucosal IgA detected in such uninfected individuals suggests their possible immune resistance against HIV. We tested if the above HIV-1-exposed but uninfected status was associated with genetic markers other than a homozygous deletion of the CCR5 gene. Methods: Based on our mapping in chromosome 15 of a gene controlling the production of neutralizing antibodies in a mouse retrovirus infection, we genotyped 42 HIV-1-exposed but uninfected Italians at polymorphic loci in the syntenic segment of human chromosome 22, and compared them with 49 HIV-1-infected and 47 uninfected healthy control individuals by a closed testing procedure. Results: A significant association was found between chromosome 22q12-13 genotypes and a putative dominant locus conferring anti-HIV-1 immune responses in the exposed but uninfected individuals. Distributions of linkage disequilibrium across chromosome 22 also differed between the exposed but uninfected and two other phenotypic groups. Conclusions: The data indicated the presence of a new genetic factor associated with the HIV-1-exposed but uninfected status.
Genotypes at chromosome 22q12-13 are associated with HIV-1-exposed but uninfected status in Italians / Y Kanari, M Clerici, H Abe, H Kawabata, D Trabattoni, S Lo Caputo, F Mazzotta, H Fujisawa, A Niwa, C Ishihara, YA Takei and M Miyazawa. - In: AIDS. - ISSN 0269-9370. - 19:10(2005), pp. 1015-1024.
Genotypes at chromosome 22q12-13 are associated with HIV-1-exposed but uninfected status in Italians
M. ClericiSecondo
;D. Trabattoni;
2005
Abstract
Objective: Despite multiple and repeated exposures to HIV-1, some individuals possess no detectable HIV genome and show T-cell memory responses to the viral antigens. HIV-1-reactive mucosal IgA detected in such uninfected individuals suggests their possible immune resistance against HIV. We tested if the above HIV-1-exposed but uninfected status was associated with genetic markers other than a homozygous deletion of the CCR5 gene. Methods: Based on our mapping in chromosome 15 of a gene controlling the production of neutralizing antibodies in a mouse retrovirus infection, we genotyped 42 HIV-1-exposed but uninfected Italians at polymorphic loci in the syntenic segment of human chromosome 22, and compared them with 49 HIV-1-infected and 47 uninfected healthy control individuals by a closed testing procedure. Results: A significant association was found between chromosome 22q12-13 genotypes and a putative dominant locus conferring anti-HIV-1 immune responses in the exposed but uninfected individuals. Distributions of linkage disequilibrium across chromosome 22 also differed between the exposed but uninfected and two other phenotypic groups. Conclusions: The data indicated the presence of a new genetic factor associated with the HIV-1-exposed but uninfected status.Pubblicazioni consigliate
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