Aim. Search of association of polymorphisms in DEFВ1, IL-10, TNF-a and TLR2 genes with development of chronic generalized periodontitis in representatives of Ural region (Caucasian race). Materials and methods. 142 patients, that were split into 3 groups, took part in the study: a group of patients with periodontitis, a group with frequent inflammatory disease of upper respiratory tract and a comparison group - healthy donors. A study of polymorphic markers was carried out: DEFB1 (-44G/C), DEFB1 (-20A/G), IL-10 (-1082 A/G), TNF-a (-308 G/A), Arg753Gln and Arg677Trp using PCR in real time mode. Results. Association of infectious pathology of upper respiratory tract and development of periodontitis diseases with markers in DEFB1 (-44G/C) and Arg753Gln and Arg677Trp genes was determined. Significant differences in distribution of genotypes and alleles of genes IL-10 and TNF-a in the group of patients with periodontitis and comparison group were not detected. Conclusion. DEFB1 (-44G/C) polymorphism can be examined as a marker of periodontitis development risk
