Abstract
Entry of HIV virus into cells is mediated by chemokine receptors. Genetic variations in chemokine receptors have been shown to modulate susceptibility to HIV infection and disease course. In this study, the frequencies of CCR5 (CCR5-Δ32), CCR2 (CCR2-64I), and SDF-1 (SDF-1-3') gene polymorphisms were determined in a Jordanian population. A total of 540 subjects were randomly selected from different regions of Jordan (South, Middle, and North). Six individuals were found to carry the CCR5-Δ32 allele (0.6%) and only in the heterozygous genotype. The frequencies of CCR2-64I and SDF1-3'A were 17.5% and 34.2%, respectively. In addition, no significant difference in the distribution of the examined polymorphisms among different regions of Jordan was detected. In conclusion, the CCR5-Δ32 allele is rare, whereas the CCR2-64I and SDF1-3'A alleles are common among Jordanians.
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