THE ROLE OF INTERLEUKIN 1β GENE POLYMORPHISM IN DEVELOPMENT OF PREDOMINANTY SENSORY CHRONIC INFLAMMATORY DEMYELINATING POLYNEUROPATHY

The aim of the present study was a search for associations between the polymorphic allelic variants 3954 C>T (rs1143644) and -511C>T (rs16944) of IL1B gene in the patients with sensory predominant chronic inflammatory demyelinating polyneuropathies (SP-CIDP) from Krasnoyarsk Region and the Sakha (Yakutia) Republic. A total of 95 people were examined, having been divided into 2 groups according to their residence. The first group consisted of 42 patients living in the Sakha (Yakutia) Republic. The second group included 53 patients living in the Krasnoyarsk Region. It was revealed that the carriers of homozygous CC genotype in the 3954C>T locus were more often detected in patients from the Sakha (Yakutia) Republic, and the carriage of TT genotype is found exclusively in the patients from Krasnoyarsk Region. When comparing the different genotype frequencies in the -511CT locus, we did not reveal any statistically significant differences between the two groups of patients. Presence of the CC genotype of the 3954C>T locus was associated with a significantly increased risk of disease in the patients from Sakha (Yakutia) Republic, while carrying CT and TT genotypes at the locus 3954C>T and the TT genotype at the locus -511C>T, is associated with increased risk disorder among patients of the Krasnoyarsk Region. The frequency of carriage of various genotypes in the 3954C>T and -511C>T loci of the IL1B gene was prevalent among the patients from the Sakha (Yakutia) Republic, the association of genotypes of CC/CT prevailed in patients from the Krasnoyarsk Region (p = 0.005), as well as prevalence of CC/CC and CC/CT (p = 0.023). However, there was no statistically significant difference in occurrence of individual genotypes between the two study groups. When analyzing the carrier frequency of high-producing alleles of 3954C and -511C in patients with SP-CIDP, it was shown that they were significantly more common among patients from the Sakha (Yakutia) Republic and patients from the Krasnoyarsk Region than the low-producing 3954T and -511T alleles. Moreover, the 3954C allele was more often found in the Yakut group (p = 0.001), and in the -511C allele for the Krasnoyarsk group of patients (p = 0.05). The presence of 3954C and -511C alleles increases the risk of SP-CIDP development in patients from the Sakha (Yakutia) Republic, as well as carriage of 3954T allele in patients from the Krasnoyarsk Region.

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