title: Toll-like receptor (TLR) 2 and 4 mutations in periodontal disease.
abstract: Toll-like receptors (TLR) are signal molecules essential for the cellular response to bacterial cell wall components. Different functional effective polymorphisms for the TLR 4 gene (Asp299Gly; Thr399Ile) and for the TLR 2 gene (Arg677Trp, Arg753Gln) have recently been described that are associated with impaired lipopolysaccharide signal transduction. A total of 122 patients with chronic periodontal disease and 122 healthy unrelated controls were genotyped for the Asp299Gly and Thr399Ile polymorphism of the TLR 4 gene and the Arg677Trp and Arg753Gln mutation of the TLR 2 gene. The mutations were identified with polymerase chain reaction followed by restriction fragment length polymorphism (RFLP) analysis. The prevalence of the Asp299Gly and the Thr399Ile mutant allele was 4.1% (10/244) and 4.5% (11/244) among periodontitis patients. For the healthy controls the prevalence was 3.3% (8/244) for the Asp299Gly (P = 0.810) and 3.7% (9/244) for the Thr399Ile mutant allele (P = 0.819). The Arg753Gln mutant allele was found in 2.9% (7/244) of the periodontitis subjects as compared to 4.1% (10/244) in the control group (P = 0.622). The Arg677Trp mutant allele was not found in any of the study subjects. Unlike in ulcerative colitis there was not observed an association between chronic periodontitis and the various mutations of the TLR 2 and 4 gene.
authors.affiliation: Poliklinik für Zahnerhaltung und Parodontologie, Ludwig-Maximilians Universität, München, Germany. mfolwa@dent.med.uni-muenchen.de
authors.forename: M
authors.initials: M
authors.lastname: Folwaczny
authors.forename: J
authors.initials: J
authors.lastname: Glas
authors.forename: H-P
authors.initials: HP
authors.lastname: Török
authors.forename: O
authors.initials: O
authors.lastname: Limbersky
authors.forename: C
authors.initials: C
authors.lastname: Folwaczny
mesh_terms: D000328:Adult; D000368:Aged; D000483:Alleles; D002908:Chronic Disease; D004587:Electrophoresis, Agar Gel / Q000379:methods; D005260:Female; D005838:Genotype; D006579:Heterozygote; D006801:Humans; D008297:Male; D008562:Membrane Glycoproteins / Q000235:genetics / Q000276:immunology*; D008875:Middle Aged; D009154:Mutation; D010510:Periodontal Diseases / Q000276:immunology*; D016133:Polymerase Chain Reaction / Q000379:methods; D012150:Polymorphism, Restriction Fragment Length; D011956:Receptors, Cell Surface / Q000235:genetics / Q000276:immunology*; D051195:Toll-Like Receptor 2; D051197:Toll-Like Receptor 4; D051193:Toll-Like Receptors
chemical_list: D008562:Membrane Glycoproteins; D011956:Receptors, Cell Surface; C495342:TLR2 protein, human; C495345:TLR4 protein, human; D051195:Toll-Like Receptor 2; D051197:Toll-Like Receptor 4; D051193:Toll-Like Receptors