BACKGROUND: The pathobiology of rheumatoid arthritis (RA) is similar to that of periodontitis in that proinflammatory cytokines and immunoglobulin G Fc receptor (FcgammaR) play an important role. Functional polymorphisms of interleukin (IL)-1 and FcgammaR were shown to be associated with susceptibility to both diseases. Therefore, we evaluated whether the IL-1 and FcgammaR gene polymorphisms represent a common risk factor for RA and periodontitis. METHODS: The study population consisted of Japanese adults with RA (RA group; N = 100), periodontitis only (P group; N = 100), and healthy individuals with no systemic or oral disease (H group; N = 100). Clinical periodontal condition was defined by measurements of probing depth, clinical attachment level, and bleeding on probing. Genomic DNA was isolated from peripheral blood and analyzed for determination of IL-1 genotypes (IL-1A+4845, IL-1B+3954, and IL-1RN+2028) and FcgammaR genotypes (FcgammaRIIA, FcgammaRIIIA, and FcgammaRIIIB) by allele-specific polymerase chain reactions. RESULTS: Among 100 patients with RA, 86% showed periodontal tissue destruction. However, the RA group exhibited milder levels of periodontal tissue destruction than the P group (P <0.01). There was a significant difference in the distribution of IL-1B+3954 C/T genotypes between the RA and P groups and between the RA and H groups (P = 0.03 for both comparisons), with enrichment of the T allele in the RA group (P = 0.04; odds ratio, 2.9 for both comparisons). The combination of IL-1A+4845 T and IL-1+3954 T alleles yielded a strong association with RA and periodontitis (RA versus P group: P = 0.00001; RA versus H group: P = 0.00001). CONCLUSIONS: These results failed to show that IL-1 and FcgammaR gene polymorphisms constitute a common risk factor for RA and periodontitis. However, it was suggested that the distributions of IL-1B+3954 genotypes and IL-1A+4845 and IL-1B+3954 haplotypes were unique to the patients with RA and periodontitis.
BACKGROUND: The pathobiology of rheumatoid arthritis (RA) is similar to that of periodontitis in that proinflammatory cytokines and immunoglobulin G Fc receptor (FcgammaR) play an important role. Functional polymorphisms of interleukin (IL)-1 and FcgammaR were shown to be associated with susceptibility to both diseases. Therefore, we evaluated whether the IL-1 and FcgammaR gene polymorphisms represent a common risk factor for RA and periodontitis. METHODS: The study population consisted of Japanese adults with RA (RA group; N = 100), periodontitis only (P group; N = 100), and healthy individuals with no systemic or oral disease (H group; N = 100). Clinical periodontal condition was defined by measurements of probing depth, clinical attachment level, and bleeding on probing. Genomic DNA was isolated from peripheral blood and analyzed for determination of IL-1 genotypes (IL-1A+4845, IL-1B+3954, and IL-1RN+2028) and FcgammaR genotypes (FcgammaRIIA, FcgammaRIIIA, and FcgammaRIIIB) by allele-specific polymerase chain reactions. RESULTS: Among 100 patients with RA, 86% showed periodontal tissue destruction. However, the RA group exhibited milder levels of periodontal tissue destruction than the P group (P <0.01). There was a significant difference in the distribution of IL-1B+3954 C/T genotypes between the RA and P groups and between the RA and H groups (P = 0.03 for both comparisons), with enrichment of the T allele in the RA group (P = 0.04; odds ratio, 2.9 for both comparisons). The combination of IL-1A+4845 T and IL-1+3954 T alleles yielded a strong association with RA and periodontitis (RA versus P group: P = 0.00001; RA versus H group: P = 0.00001). CONCLUSIONS: These results failed to show that IL-1 and FcgammaR gene polymorphisms constitute a common risk factor for RA and periodontitis. However, it was suggested that the distributions of IL-1B+3954 genotypes and IL-1A+4845 and IL-1B+3954 haplotypes were unique to the patients with RA and periodontitis.
Authors: Javier Silvestre-Rangil; Leticia Bagán; Francisco Javier Silvestre; José Vicente Bagán Journal: Clin Oral Investig Date: 2016-02-18 Impact factor: 3.573
Authors: Wings T Y Loo; Chang-bin Fan; Lan-jun Bai; Yuan Yue; Yi-ding Dou; Min Wang; Hao Liang; Mary N B Cheung; Louis W C Chow; Jin-le Li; Ye Tian; Liu Qing Journal: J Transl Med Date: 2012-09-19 Impact factor: 5.531