Interleukin 1β (+3954, −511 and −31) polymorphism in chronic periodontitis patients from North India

Abstract

Objective. Several studies have implicated the role of interleukin-1 in various chronic diseases including periodontitis. The present study was carried out with an aim to evaluate the role of interleukin 1β polymorphisms, namely +3954C/T, −511C/T and −31T/C, in the development of chronic periodontitis. Materials and methods. Twenty-nine chronic periodontitis patients and 31 healthy controls of North Indian origin from Chhattisgarh were recruited for the study. The genotypes for the three variants were determined using the PCR-RFLP technique and the strength of association between genotypes and periodontitis was determined by odds ratio with 95% confidence interval (CI) and chi-square analysis. Results. Analysis for the +3954 allelic and genotypic frequencies of the polymorphism revealed a significant difference in the CT genotype between periodontitits patients and controls (p = 0.03). A significant difference was also observed in the allelic frequencies between the two groups (p = 0.02). For the −511 site, TT genotype revealed a significant association with the disease (p = 0.01). A significant association was also found following the co-dominant model (p = 0.007). However, the −31 polymorphism revealed no significant difference between patients and controls. Conclusions. In conclusion, the present study suggests a strong association of the TT genotype of −511 and CT genotype of +3954 variant of interleukin 1β with chronic periodontitis. However, the −31 variant did not show a significant association with the disease.

Key Words:

• chronic periodontitis
• interleukin-1β
• polymorphism
• genetics

Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.