Clastogenic effects of different Ureaplasma urealyticum serovars on human chromosomes

R.A.F Cunha, C.P Koiffman, D.H. Souza, K. Takei
1997 Brazilian Journal of Medical and Biological Research  
The possibility that Ureaplasma urealyticum might play an important role in human infertility was first raised more than 20 years ago, but this association remains speculative. Considering the hypothesis that the pathogenicity of Ureaplasma urealyticum may depend on its serotypes, the clastogenic effects of different strains of Ureaplasma urealyticum, at concentrations of 10 3 CCU (color changing units)/ml, 10 4 CCU/ml and 10 5 CCU/ml, were evaluated in vitro in short-term cultures of human
more » ... hocytes. Total or partial mitotic inhibition was produced by Ureaplasma urealyticum serotypes 2, 3 and 10 independent of the concentration (10 3 CCU/ml, 10 4 CCU/ml or 10 5 CCU/ml) of the microorganisms employed. In contrast, the clastogenic effects observed with serotypes 1, 7 and 12 varied according to the concentration employed in the test. Mitotic alterations were observed in Ureaplasma urealyticum serotypes 5, 6, 7, 8, 9, 11 and 12. Chromatid gaps (53.0%) and chromatid breaks (13.9%) were the most frequent types of alterations observed. The results of this in vitro assay demonstrated that the clastogenic effects varied with the Ureaplasma urealyticum serotypes evaluated.
doi:10.1590/s0100-879x1997000600008 pmid:9292112 fatcat:iyvoo2zjtvdxbpxmfuydf57y64