TABLE 2.
Quantification of fimA expression in P. gingivalis strains
| P. gingivalis strain (FimA type) | Fold decrease of fimA expression in the presence of ArcAa |
|---|---|
| ATCC33277 (I) | 12.8 ± 0.7 (a) |
| BH18/10 (I) | 3.1 ± 0.2 (bc) |
| OMZ409 (II) | 5.2 ± 1.5 (b) |
| ATCC 49417 (II) | 2.3 ± 0.5 (c) |
| HG564 (IV) | 1.4 ± 0.1 (c) |
| W83 (IV) | 1.3 ± 0.2 (c) |
a
Levels of fimA transcripts were measured by real-time PCR, and the change in expression levels was calculated by dividing the copy number of the gene transcript in the P. gingivalis strains grown in the absence of S. cristatus CC5A ArcA by that in the strains grown in the presence of ArcA. Results are means and standard deviations from three independent experiments. Two-way analysis of variance revealed a significant difference in changes among the groups (P < 0.001). Means with different letters are significantly different by the post hoc test (Student-Newman-Keuls method, P < 0.05).