Effects of Porphyromonas gingivalis on focal adhesive components paxillin and FAK of gingival epithelial cells / 实用口腔医学杂志

ABSTRACT

Objectives: To explore the destructive mechanism of P.gingivalis on periodontium and to better understand the pathogenic effects of P.gingivalis fimbriae. Methods:Western blotting was used to detect the degradation effects of P.gingivalis ATCC 33277 and its fimA-deficient mutant on focal adhesion components paxillin and focal adhesion kinase (FAK) of Hela cells and immortalized gingival epithelial cells (IHGE cells). Results:P.gingivalis ATCC 33277 wild strain and its fimA-deficient mutant induced degradation of paxillin and FAK both in Hela cells and in IHGE cells. fimA-deficient mutant had a remarkable weaker degradation ability than the wild strain. In IHGE cells, paxillin and FAK were degraded in a time-and MOI-dependent manner. Conclusion:P.gingivalis fimbriae-mediated adhesion and invasion to epithelial cells may promote the degradation of focal adhesion components. IHGE cells may be more suitable for the study of periodontal pathogens than Hela cells.