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Psoriasis risk SNPs and their association with HIV-1 control.
Human Immunology 2017 Februrary
Human evolution has resulted in selection for genetic polymorphisms beneficial in the defense against pathogens. However, such polymorphisms may have the potential to heighten the risk of autoimmune disease. Here, we investigated whether psoriasis-associated single nucleotide polymorphisms influence host control of HIV-1 infection. We studied psoriasis and viral immune response variants in three HIV-positive cohorts: (1) HIV-1 controllers and non-controllers in the Study of the Consequences of the Protease Inhibitor Era (SCOPE) cohort (n=366), (2) Individuals with primary HIV infection in the Options cohort (n=675), and (3) HIV-positive injection drug users from the Urban Health Study (UHS) (n=987). We found a strong association of two psoriasis MHC variants, rs9264942 and rs3021366, with both HIV-1 controller status and viral load, and identified another Class III MHC variant rs9368699 to be strongly associated with viral load. A number of genetic variants outside the MHC (SOX5, TLR9, SDC4, PROX1, IL12B, TLR4, MBL-2, TYK2, IFIH1) demonstrated nominal significance. Overall, our data suggest that several psoriasis variants within the MHC have a robust impact on HIV-1 control, while variants outside the MHC require further investigation.
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