Ancestry indicative markers in HIV positive patients in the state of Mato Grosso, Brazil

Abstract

OBJECTIVE: Ancestry Indicative Markers are used to define the allelic frequency of genes from different ethnic groups in populations of certain localities of interest, for analysis of population ancestry and estimation of ethnic mixture. This work aimed to evaluate the frequency of occurrence of the ancestry Indicative Markers SB-19.3, APO, AT3 / ID and PV-92 and to determine the existence of polymorphisms for these markers in the state of Mato Grosso. METHOD: The study aimed to estimate allelic and genotype frequencies, adherence to the Hardy-Weinberg equilibrium and genetic differentiation in the sample of 238 controls formed by HIV free individuals residing in twenty-six different municipalities in the state, collected at the Júlio Muller University Hospital and in a sample of 516 HIV-positive patients also residing in the state. RESULTS: The Hardy-Weinberg equilibrium test revealed an imbalance between the observed and expected proportions of Sb19.3 and APO loci in the control population. Applying the genetic differentiation test, control populations and HIV-positive patients differed for the four loci analyzed. CONCLUSION: The population of the state of Mato Grosso, Brazil proved to be very heterogeneous, confirming hypotheses about its history of colonization. Control populations and HIV-positive patients differed for the four loci analyzed.