Abstract:
:Dental plaque is a complex biofilm that accretes in a series of discrete steps proceeding from a gram-positive streptococcus-rich biofilm to a structure rich in gram-negative anaerobes. This study investigated information flow between two unrelated plaque bacteria, Streptococcus cristatus and Porphyromonas gingivalis. A surface protein of S. cristatus caused repression of the P. gingivalis fimbrial gene (fimA), as determined by a chromosomal fimA promoter-lacZ reporter construct and by reverse transcription-PCR. Signaling activity was associated with a 59-kDa surface protein of S. cristatus and showed specificity for the fimA gene. Furthermore, P. gingivalis was unable to form biofilm microcolonies with S. cristatus. Thus, S. cristatus is capable of modulating virulence gene expression in P. gingivalis, consequently influencing the development of pathogenic plaque.
journal_name
J Bacterioljournal_title
Journal of bacteriologyauthors
Xie H,Cook GS,Costerton JW,Bruce G,Rose TM,Lamont RJdoi
10.1128/jb.182.24.7067-7069.2000keywords:
subject
Has Abstractpub_date
2000-12-01 00:00:00pages
7067-9issue
24eissn
0021-9193issn
1098-5530journal_volume
182pub_type
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journal_title:Journal of bacteriology
pub_type: 杂志文章
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更新日期:1986-12-01 00:00:00
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