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Infect Immun. 1993 Sep;61(9):3611-5.

Stimulation of DNA synthesis in osteoblast-like MC3T3-E1 cells by Bordetella bronchiseptica dermonecrotic toxin.

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  • 1Department of Tuberculosis Research, Osaka University, Japan.

Abstract

We investigated the effects of Bordetella bronchiseptica dermonecrotic toxin on DNA synthesis in MC3T3-E1 cells. The rate of [methyl-3H]thymidine incorporation increased in the toxin-treated cells more than 24 h after addition of the toxin under the serum-starved conditions. This effect was dependent on the toxin concentration ranging from 0.3 to 3 ng/ml and was eliminated by aphidicolin and hydroxyurea, inhibitors for DNA replication. In the toxin-treated culture, the number of cells did not increase but polynucleated cells appeared and their number increased to ca. 50% of the total number of cells 6 days after the toxin addition. From these results, we concluded that the toxin stimulates DNA replication in MC3T3-E1 cells without cell proliferation.

PMID:
8359884
[PubMed - indexed for MEDLINE]
PMCID:
PMC281055
Free PMC Article
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