Distribution of rs2124594 genotypes in chronic lymphocytic leukemia patients depending on radiation anamnesis

Abstract

Objective: to test the method of polymerase chain reaction with following fragments’ length restriction to determine the rs2124594 polymorphism and to study its contribution in the development of chronic lymphocytic leukemia (CLL) in the post-Chornobyl period. Methods. Genotypes of rs2124594 were determined in 109 patients with CLL of B-cell origin including 53 patients irradiated due to the Chornobyl NPP accident. Genotypes distribution among CLL patients was compared with healthy persons of European origin (the 1000 Genomes Project data set was used as a reference). Results. Validity of the tested method was confirmed by direct sequencing. Associations between CLL risks and C allele (OR = 2.37; 95 % CI 1.50-3.73; p = 0.003), CLL risks and CT genotype (OR = 2.10; 95 % CI 1.38-3.21; p = 0.0012) were found. Distributions of rs2124594 genotypes in exposed and non-exposed to ionizing radiation CLL patients did not differ. Conclusions. The association of single nucleotide polymorphisms across the 8q24 chromosome region (positioned at 127180736 and 127183014 near c[MYC gene) with CLL risks was confirmed. Modified influence of ionizing radiation on genetic susceptibility associated with rs2124594 was not found in this pilot study.