alexa An additive effect of protective host genetic factors correlates with HIV nonprogression status.
Infectious Diseases

Infectious Diseases

Journal of AIDS & Clinical Research

Author(s): Salgado M, Simn A, SanzMinguela B, Ralln NI, Lpez M, , Salgado M, Simn A, SanzMinguela B, Ralln NI, Lpez M,

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Abstract INTRODUCTION: In HIV-positive individuals, complex multifactorial mechanisms control viral infection. In addition to viral and immunological factors, the host genetic background also plays an important role. Our objective was to evaluate how various genetic factors associated with delayed AIDS onset. METHODS: Thirty HIV+ long-term nonprogressors (LTNPs) and 30 known progressors were analyzed. Host genes were analyzed in peripheral blood mononuclear cells DNA: CCR5 and HLA were polymerase chain reaction typed. HLA-C5', HCP5 polymorphisms, and CCL3L1 copy number were determined using real-time polymerase chain reaction. RESULTS: The CCL3L1high-copy-CCR5 deletion genetic risk groups was overrepresented in LTNPs. However, separately, neither CCL3L1 nor CCR5 were significantly associated with clinical outcome. HLA seemed as a strong nonprogression determinant, mainly HLA-B and the less-studied HLA-C. HLA-Cw0102 and HLA-C5' had an impact on LTNP phenotype along with HLA-B5701 and B2705. The presence of allele combinations like HLA- B*5701-Cw0602, HLA-B*2705-Cw0102, or HLA-B*3801-Cw1203 had the strongest effect in non-progression. As for HCP5, no independent effect was observed. The studied factors had additive effects, and although the number of patients was small, it seemed that carrying a high number of protective alleles associated with progression delay. CONCLUSIONS: We showed the additive load of protective host factors was predictive of nonprogression, and that HLA-associated factors were predominant in this global effect. This article was published in J Acquir Immune Defic Syndr and referenced in Journal of AIDS & Clinical Research

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