期刊
JOURNAL OF DENTAL RESEARCH
卷 90, 期 4, 页码 501-505出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/0022034510388808
关键词
Streptococcus mutans; Streptococcus gordonii; Actinomyces naeslundii; biofilm; protease; quorum sensing
资金
- National Institute of Dental and Craniofacial Research [DE017708]
Streptococcus mutans is the primary cariogen that produces several virulence factors that are modulated by a competence-stimulating peptide (CSP) signaling system. In this study, we sought to determine if proteases produced by early dental plaque colonizers such as Streptococcus gordonii interfere with the subsequent colonization of S. mutans BM71 on the existing streptococcal biofilms. We demonstrated that S. mutans BM71 colonized much less efficiently in vitro on streptococcal biofilms than on Actinomyces naeslundii biofilms. Several oral streptococci, relative to A. naeslundii, produced proteases that inactivated the S. mutans CSP. We further demonstrated that cell protein extracts from S. gordonii, but not from A. naeslundii, interfered with S. mutans BM71 colonization. In addition, S. mutans BM71 colonized more efficiently on the sgc protease knockout mutant of S. gordonii than on the parent biofilms. In conclusion, proteases of early colonizers can interfere with subsequent colonization by S. mutans in vitro.
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