The Consequence of a Founder Effect: CCR5-�?32, CCR2-64I and SDF1-3’A Polymorphism in Vlach Gypsy Population in Hungary

Pathology & Oncology Research

Judit Béres¹  Szilvia Kanizsai²  Emese Juhász²  Károly Nagy² 

[1] National Center for Healthcare Audit and Inspection$$;Semmelweis University$$

关键词: Hungary;   

DOI  :  10.1007/s12253-011-9425-4

学科分类：生理学与病理学

来源: Springer

【 摘 要 】

Frequencies of genetic polymorphisms of the three most frequent HIV-1 resistance-conferring alleles playing an important role in HIV-1 pathogenesis were analysed in Vlach Gypsy populations living in Hungary, as the largest minority. Mutations in the encoding genes, such as CCR5-�?32, CCR2-64I and SDF1-3’A are shown to result in protective effects against HIV-1 infection and disease progression. 560 samples collected from Vlach Gypsy individuals living in 6 North-East Hungarian settlements were genotyped by PCR-RFLP method. Overall allele frequencies of CCR5-�?32, CCR2-64I and SDF1-3’A were found as 0.122, 0.186 and 0.115 respectively. All the observed genotype frequencies were in accordance with Hardy-Weinberg equilibrium . In regions, however, Vlach Gypsies live in majority and in ethnically homogenous communities, a higher CCR5-�?32 mutations were found, with allele frequencies of 0.148 and 0.140 respectively, which are remarkably higher than those in general Hungarian people, and ten times higher than in regions of North-Western India from where present day Hungarian Gypsies originated in the Middle Ages. In the background of this higher CCR5-�?32 allele frequency in the population analysed in our study a genetic founder effect could be assumed. Allele frequency of CCR2-64I was found to be among the highest in Europe. SDF1-3’A allele frequency in Vlach Gypsies was significantly lower than in ethnic Hungarians. 63% of the total 560 individuals tested carried at least one of the mutations studied. These results could partially explain the low incidence of HIV/AIDS among Vlach Gypsies in Hungary.

【 授权许可】

Unknown