title: The influence of type 2 diabetes mellitus on the expression of inflammatory mediators and tissue inhibitor of metalloproteinases-2 in human chronic periodontitis.
abstract: OBJECTIVE
  The purpose of this study was to compare and quantify the expression of C-reactive protein (CRP), matrix metalloproteinase (MMP)-14, and tissue inhibitor of metalloproteinases (TIMP)-2 in gingival tissues of patients with chronic periodontitis accompanied with inflammatory reaction related to alveolar bone resorption with or without type 2 diabetes mellitus (DM).
  
  
  METHODS
  Twelve patients with type 2 DM and chronic periodontitis (group 3), twelve patients with chronic periodontitis (group 2), and twelve healthy individuals (group 1) were included in the study. Gingival tissue biopsies were collected from each patient and from healthy individuals at the time of periodontal surgery (including surgical crown lengthening) or tooth extraction. The concentrations of cytokines were determined by a western blot analysis.
  
  
  RESULTS
  The expression levels of CRP and MMP-14 increased in group 2 and 3, and they were highest in group 3. The expressions of TIMP-2 also increased in group 2 and 3.
  
  
  CONCLUSIONS
  This study demonstrated that the expression levels of CRP, MMP-14, and TIMP-2 might be inflammatory markers in periodontal inflamed tissue. It can be assumed that CRP, MMP-14, and TIMP-2 may be partly involved in the progression of periodontal inflammation associated to type 2 DM.
authors.affiliation: Department of Periodontology, Kyungpook National University School of Dentistry, Daegu, Korea.
authors.forename: Jae-Bung
authors.initials: JB
authors.lastname: Kim
authors.forename: Mi-Hwa
authors.initials: MH
authors.lastname: Jung
authors.forename: Je-Yeol
authors.initials: JY
authors.lastname: Cho
authors.forename: Jin-Woo
authors.initials: JW
authors.lastname: Park
authors.forename: Jo-Young
authors.initials: JY
authors.lastname: Suh
authors.forename: Jae-Mok
authors.initials: JM
authors.lastname: Lee