Abstract
Periodontitis is an inflammatory disease affecting the connective tissue surrounding the teeth leading to tooth loss. Pathogens associated with periodontitis interact with Toll-like receptors (TLRs) to induce cytokines causing and aggravating disease. We screened 197 individuals suffering from generalized periodontitis for the presence of Asp299Gly and Thr399Ile of TLR-4 as well as Arg753Gln of TLR-2 in comparison to matched controls. Single-nucleotide polymorphisms (SNPs) of TLR-4 were elevated among patients (odd's ratio 3.650, 95% CI 1.573–8.467, P⩽0.0001), while no difference was observed for TLR-2. TLR-4 SNPs were correlated with chronic periodontitis (odd's ratio 5.562, 95% CI 2.199–14.04, P⩽0.0001), but not with aggressive periodontitis. This observation was confirmed employing a group of periodontally healthy probands over 60 years of age. These data demonstrate that genetic variants of TLR-4 may act as risk factors for the development of generalized chronic periodontitis in humans.
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Acknowledgements
This study was supported by grants given by the Deutsche Forschungsgemeinschaft (DFG) to NWJS and RRS (Schr 726/1–2), and to DK and PP (GRK 325); and by the BMBF to RRS (01KI0104). We hereby state that they do not have any commercial or other association that might pose a conflict of interest. The excellent technical assistance of Fränzi Creutzburg, Sabine Bobbe and Diana Woellner is acknowledged.
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Schröder, N., Meister, D., Wolff, V. et al. Chronic periodontal disease is associated with single-nucleotide polymorphisms of the human TLR-4 gene. Genes Immun 6, 448–451 (2005). https://doi.org/10.1038/sj.gene.6364221
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DOI: https://doi.org/10.1038/sj.gene.6364221
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