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Assessment of MMP-1, MMP-8 and TIMP-2 in experimental periodontitis treated with kaempferol

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Umut Balli, Burcu Ozkan Cetinkaya, Gonca Cayir Keles, Zeynep Pinar Keles, Sevki Guler, Mehtap Unlu Sogut, Zuleyha Erisgin,
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 ( Umut Balli ) - Bulent Ecevit University Faculty of Dentistry Department of Periodontology
 ( Burcu Ozkan Cetinkaya ) - Turkey Ondokuzmayis University Faculty of Dentistry Department of Periodontology
 ( Gonca Cayir Keles ) - Turkey Ondokuzmayis University Faculty of Dentistry Department of Periodontology
 ( Zeynep Pinar Keles ) - Turkey Ondokuzmayis University Faculty of Dentistry Department of Periodontology
 ( Sevki Guler ) - Turkey Ondokuzmayis University Faculty of Dentistry Department of Periodontology
 ( Mehtap Unlu Sogut ) - Turkey Ondokuzmayis University Samsun High School of Health
 ( Zuleyha Erisgin ) - Turkey Giresun University Faculty of Medicine Department of Histology and Embryology

Abstract


Purpose: The objective of this study was to investigate the effect of a dietary flavonoid, kaempferol, which has been shown to possess antiallergic, anti-inflammatory, anticarcinogenic, and antioxidant activities on the periodontium by histomorphometric analysis and on gingival tissue matrix metalloproteinase-1 (MMP-1), MMP-8, and tissue inhibitor of metalloproteinase-2 (TIMP-2) by biochemical analysis of rats after experimental periodontitis induction.

Methods: Sixty Wistar rats were randomly divided into six groups of ten rats each, and silk ligatures were placed around the cervical area of the mandibular first molars for 15 days, except in the healthy control rats. In the experimental periodontitis groups, systemic kaempferol (10 mg/kg/2d) and saline were administered by oral gavage at two different periods (with and without the presence of dental biofilm) to all rats except for the ten non-medicated rats. Alveolar bone area, alveolar bone level, and attachment level were determined by histomorphometric analysis, and gingival tissue levels of MMP-1, MMP-8, and TIMP-2 were detected by biochemical analysis.

Results: Significantly greater bone area and significantly less alveolar bone and attachment loss were observed in the kaempferol application groups compared to the control groups (P<0.05). In addition, gingival tissue MMP-1 and -8 levels were significantly lower in the kaempferol application groups compared to the control groups and the periodontitis group (P<0.001). There were no statistically significant differences in TIMP-2 levels between the kaempferol and saline application groups (P>0.05).

Conclusions: Kaempferol application may be useful in decreasing alveolar bone resorption, attachment loss, and MMP-1 and -8 production in experimental periodontitis.

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Enzyme-linked immunosorbent assay; Histology; Kaempferol; Periodontal disease; Rats

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