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DNA methylation status of the IL8 gene promoter in oral cells of smokers and non-smokers with chronic periodontitis.

Abstract：

AIM:This study analysed the status of DNA methylation in the promoter region of the IL8 gene in oral mucosa cells from healthy, smoker and non-smoker subjects with chronic periodontitis and compared these findings among groups with mRNA levels. MATERIAL AND METHODS:Genomic DNA from epithelial oral cells of 41 healthy subjects, 30 smokers with chronic periodontitis and 40 non-smokers with chronic periodontitis were purified and modified by sodium bisulphite. Genomic DNA from blood leucocytes and gingival cells from biopsies of 13 subjects of each group were also purified and modified by sodium bisulphite. Modified DNA was submitted by methylation-specific polymerase chain reaction (PCR) (MSP), electrophoresed on 10% polyacrylamide gels and stained with SYBR Gold. Total RNA from gingival cells was also isolated using the TRIzol reagent, and real-time PCR performance was used to detect the levels of interleukin-8 mRNA. RESULTS:Our results indicate that individuals with chronic periodontitis, independent of smoking habit, have a higher percentage of hipomethylation of the IL8 gene than those controls in epithelial oral cells (p<0.0001), and expression of higher levels of interleukin-8 (IL-8) mRNA than controls in gingival cells (p=0.007). No significant differences among groups were observed in gingival cells and blood cells. CONCLUSION:We conclude that inflammation in the oral mucosa might lead to changes in the DNA methylation status of the IL8 gene in epithelial oral cells.

journal_name

J Clin Periodontol

journal_title

Journal of clinical periodontology

authors

Oliveira NF,Damm GR,Andia DC,Salmon C,Nociti FH Jr,Line SR,de Souza AP

doi

10.1111/j.1600-051X.2009.01446.x

subject

Has Abstract

pub_date

2009-09-01 00:00:00

pages

719-25

issue

9

eissn

0303-6979

issn

1600-051X

pii

CPE1446

journal_volume

36

pub_type

杂志文章

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