RESUMO
AIM The current study investigated the association of RAGE G82S polymorphism with chronic periodontitis in South Indians with and without type II Diabetes mellitus. MATERIALS AND METHODS: 405 individuals were enrolled into 3 groups-systemically and periodontally healthy with no attachment loss (nâ¯=â¯135), generalized chronic periodontitis (nâ¯=â¯135)and generalized chronic periodontitis with type II diabetes mellitus(nâ¯=â¯135). Periodontal clinical parameters were recorded. RFLP-PCR was utilized for genotyping. RESULTS: Frequencies of genotype GG, GA and AA were 133, 2, 0 in group I respectively, 131, 4, 0 in group II respectively and 118, 13, 4 in group III respectively. Pearson's Chi squared test demonstrated a significant difference in the genotype distribution between the three groups (χ2â¯=â¯19.88,Pâ¯<â¯0.001). Fischer exact-test showed that the variant GA/AA genotype was associated with a significantly increased risk for generalized chronic periodontitis in type II diabetics when compared with the GG genotype of systemically and periodontally healthy subjects (OR-9.58, 95% CI 2.168-42.339, Pâ¯<â¯0.001) and non-diabetic chronic periodontitis subjects (OR- 4.71, 95% CI: 1.54-14.42, Pâ¯<â¯0.05). No association and increased susceptibility to chronic periodontitis was observed in subjects with GA/AA genotype when compared with systemically and periodontally healthy subjects (OR- 2.031, 95% CI: 0.366-11.277 Pâ¯>â¯0.05). Furthermore, comparison of clinical parameters based on genotype distribution revealed statistically significant higher mean plaque (Pâ¯<â¯0.05) and sulcus bleeding score (Pâ¯<â¯0.001) in group-III subjects. CONCLUSION: RAGE G82S gene polymorphism confers susceptibility to generalized chronic periodontitis in type II diabetic subjects of South Indian Tamilian ethnicity.