PMID: 9168859Jun 1, 1997Paper

Activation and novel processing of matrix metalloproteinases by a thiol-proteinase from the oral anaerobe Porphyromonas gingivalis

Journal of Dental Research
A A DeCarloH Birkedal-Hansen

Abstract

A critical outcome of periodontal disease is degradation of the collagenous periodontal ligament that connects teeth to bone in the dental arch. Periodontal diseases occur in response to bacterial colonization of the teeth, but their molecular pathogenesis is still speculative. One family of enzymes, known as the matrix metalloproteinases (MMPs), has been implicated in the degradation of the periodontal ligament. MMPs, which are also suspected to play a role in many other physiologic and pathologic remodeling processes, can be secreted by epithelial cells surrounding the teeth and are found in relative abundance in tissues and fluids near periodontally diseased sites. Since most MMPs are secreted as inactive zymogens which may be activated by limited proteolysis, it has been suggested that proteinases expressed by the infecting periodontal pathogens might activate latent host MMPs to initiate or accelerate degradation of the collegenous periodontal ligament. The aim of this work was to examine interactions between purified host MMPs and bacterial proteinase. In this article, we demonstrate that a proteinase isolated from the periodontopathogen Porphyromonas gingivalis can activate MMP-1, MMP-3, and MMP-9 and can catalyze the su...Continue Reading

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