Abstract
Although human leukocyte antigen (HLA) gene polymorphism has been investigated in many populations around the world, the data on MHC class I chain-related (MIC) genes are still limited. The present study is aimed to analyze the allelic polymorphism of MICA and MICB genes and haplotype associations with HLA-B locus in 132 healthy, unrelated individuals from the Bulgarian population by next generation sequencing (NGS). A total of 36 MICA and 16 MICB alleles were observed with the highest frequency detected for MICA*008:01 (17.1%) and MICB*005:02 (32.4%). Further, two and three-loci haplotype frequencies and pairwise linkage disequilibrium were estimated. Highly significant global linkage disequilibrium was found between either HLA-B and MICA and MICB genes. This is the first study on MICA and MICB allelic polymorphism, linkage disequilibrium, and haplotype polymorphism in the Bulgarian population. These results will allow for better characterization of the genetic heterogeneity of the Bulgarian population and could contribute to further analyses on MICA and MICB clinical significance.
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