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Differential expression and adherence of Porphyromonas gingivalis FimA genotypes
Author(s) -
Zheng C.,
Wu J.,
Xie H.
Publication year - 2011
Publication title -
molecular oral microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 77
eISSN - 2041-1014
pISSN - 2041-1006
DOI - 10.1111/j.2041-1014.2011.00626.x
Subject(s) - porphyromonas gingivalis , streptococcus gordonii , fimbria , virulence , microbiology and biotechnology , genotype , chronic periodontitis , gene , pathogen , periodontal pathogen , biology , periodontitis , virulence factor , bacteria , genetics , medicine , streptococcaceae , antibiotics
Summary Porphyromonas gingivalis is a primary pathogen involved in the initiation and progression of adult chronic periodontitis. Its colonization on oral surfaces is a necessary first step leading to infection. FimA, a subunit protein of major (long) fimbriae, is a well‐known virulence factor. Based on its nucleotide sequence, FimA is classified into several genotypes. We compared here the transcriptional levels of the fimA gene in several P. gingivalis strains using real‐time polymerase chain reaction analysis, fimbrial display on the P. gingivalis surface using transmission electronic microscopy, and the adherence competencies of P. gingivalis strains carrying different types of FimAs towards saliva and Streptococcus gordonii surfaces using mutagenesis analysis. We demonstrated differential expression of each fimA gene in these P. gingivalis strains. A correlation of the transcription level of fimA and binding activity of P. gingivalis was revealed. We show that P. gingivalis strains with genotype I and II of FimA are efficient in interaction with saliva or S. gordonii . This work highlights the important role of FimA type I and II in P. gingivalis attachment to oral surfaces.