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Levels of interferon-gamma and transcription factor T-bet in progressive periodontal lesions in patients with chronic periodontitis.

Abstract：

BACKGROUND:Periodontitis is an infection with an episodic pattern of tissue-support destruction. During the generation of a primary CD4(+) T helper 1 (Th1) response, interferon-gamma (IFN-gamma) acts as a positive regulator by selectively inducing Th1 differentiation through increased transcription of T-bet. The aims of this work were to determine IFN-gamma levels in samples of gingival crevicular fluid (GCF) and to determine IFN-gamma and transcription factor T-bet expression in gingival tissue from patients undergoing the progression of chronic periodontitis. METHODS:One hundred six patients with moderate or advanced chronic periodontitis were selected. Periodontitis was characterized by at least six sites with probing depth >or=5 mm, clinical attachment loss >or=3 mm, and radiographic bone loss. Periodontitis progression was determined by the tolerance method. GCF was collected using a paper strip, and enzyme-linked immunosorbent assay was performed to determine the total amount of IFN-gamma. Gingival biopsies were obtained from patients for real-time reverse transcription-polymerase chain reaction to determine IFN-gamma and T-bet expression. Statistical analysis was performed using statistical software. Data were expressed as subject means +/- SD. The chi(2) and Student t tests were used. RESULTS:The total amount and concentration of cytokine IFN-gamma were significantly higher in active sites than in inactive sites (99.90 versus 68.90 pg; P = 0.03; 106.62 pg/mg versus 75.64 pg/mg, P = 0.04, respectively). Active sites showed a significantly lower Delta cycle threshold (Ct) of IFN-gamma than inactive sites (P = 0.04), whereas the expression of transcription factor T-bet was increased 1.42-fold in active sites compared to inactive sites. CONCLUSION:The total amount and concentration of cytokine IFN-gamma in GCF samples and transcription factor T-bet expression were increased in progressive periodontal lesions in patients with chronic periodontitis.

journal_name

J Periodontol

journal_title

Journal of periodontology

authors

Dutzan N,Vernal R,Hernandez M,Dezerega A,Rivera O,Silva N,Aguillon JC,Puente J,Pozo P,Gamonal J

doi

10.1902/jop.2009.080287

subject

Has Abstract

pub_date

2009-02-01 00:00:00

pages

290-6

issue

eissn

0022-3492

issn

1943-3670

pii

10.1902/jop.2009.080287

journal_volume

pub_type

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Levels of interferon-gamma and transcription factor T-bet in progressive periodontal lesions in patients with chronic periodontitis.