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Proteolytic activity in black-pigmented bacteroides species
Journal of Endodontics
|October 1, 1989
Summary
Black-pigmented Bacteroides, often found in abscesses, exhibit varying proteolytic enzyme activity. Bacteroides gingivalis showed the highest activity, degrading collagen and other substrates, suggesting strain differences impact virulence.
Area of Science:
- Microbiology
- Oral Biology
- Bacterial Pathogenesis
Background:
- Black-pigmented Bacteroides species are common in dentoalveolar abscesses.
- Bacterial extracellular enzymes are a key virulence mechanism, degrading host tissues and defenses.
Purpose of the Study:
- To investigate the proteolytic enzyme activity of various black-pigmented Bacteroides species.
- To compare the enzymatic profiles across different strains and species.
Main Methods:
- Assessed proteolytic activity of 18 bacterial strains from 9 black-pigmented Bacteroides species.
- Examined degradation of multiple substrates, including collagen and specific enzyme substrates like BANA.
Main Results:
- Bacteroides gingivalis exhibited the highest proteolytic activity, degrading the most substrates.
- B. gingivalis was unique in degrading collagen and producing high levels of enzymes for BANA and N-CBz-glycyl-glycyl-arginine.
- Other species like B. intermedius and B. endodontalis showed specific enzymatic activities.
Conclusions:
- Significant variation in enzyme production exists even between strains of the same species.
- This strain heterogeneity in proteolytic enzymes may influence the severity and outcome of in vivo infections.