TLR4 and IL-18 gene variants in chronic periodontitis: impact on disease susceptibility and severity.

Abstract:

:The aim of the study was to assess whether genotypes in the Toll-like receptor 4 gene and in the promoter of the interleukin-18 gene are associated with the susceptibility to chronic periodontitis. 108 chronic periodontitis patients and 76 controls were genotyped for c.896A>G/1196C>T (TLR4 gene) and for c.-368G>C/ c.-838C>A (IL-18 promoter). There were no significant differences in genotype and allele distributions between the study groups. Periodontitis severity in patients with TLR4 c.896AG/1196CT genotype was significantly higher than wildtype carriers. The percentage of teeth with clinical attachment loss > or = 5 mm was 77.3% and 58.8%, respectively (p < or = 0.006, t-test). All subjects were further classified into carriers and non-carriers of at least one variant of each gene. A logistic regression analysis adjusted for gender, smoking, and age showed no association between gene variant carrier status and periodontitis (OR = 1.98, 95% CI 0.61-6.39). The results did not show that IL-18 and TLR4 variants have an effect on the susceptibility to chronic periodontitis. Considering the low number of periodontitis patients carrying TLR4 variants (11%), a comparison of the periodontitis severity depending on the genotype has to be interpreted cautiously.

journal_name

Immunol Invest

authors

Noack B,Görgens H,Lorenz K,Schackert HK,Hoffmann T

doi

10.1080/08820130902846290

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

297-310

issue

3-4

eissn

0882-0139

issn

1532-4311

pii

10.1080/08820130902846290

journal_volume

38

pub_type

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