Correlation of the interleukin-29 levels in crevicular fluid and plasma with the genetic polymorphism in chronic and aggressive periodontitis patients

Abstract

ObjectiveTo assess the effect of single nucleotide polymorphism (SNP) on the Interleukin (IL-29) quantity in gingival crevicular fluid (GCF) and plasma of chronic and aggressive periodontitis patients. DesignPatients with periodontal health (n=30), chronic generalized periodontitis (n=30) and generalized aggressive periodontitis (n=30) were subjected to IL-29 quantity estimation in GCF and plasma using enzyme linked immunosorbent assay and was correlated with IL-29 SNP (rs30461) using polymerase chain reaction. ResultsIL-29 concentration in GCF and plasma was highest in aggressive periodontitis patients (114.17±95.07pg/ml and 149.69±109.90pg/ml respectively). The least concentration was found in subjects with healthy periodontium (47.50±37.75pg/ml and 54.52±37.53pg/ml) and in chronic periodontitis it was found to be 65.01±41.26pg/ml and 81.17±46.23pg/ml. The difference in the quantity of IL-29 in GCF and plasma among different groups was statistically significant (p<0.001 and p<0.001 respectively). rs30461 polymorphism of IL-29 analysis revealed that difference in the prevalence of A/A, A/G and G/G genotype among three groups was not statistically significant (p=0.097). ConclusionIncreased quantity of IL-29 in GCF and plasma of subjects with periodontitis suggests a role in pathogenesis of periodontitis and the SNP (rs30461) is not related to susceptibility to periodontitis in this population of Indian individuals.