Journal Article

Aneuploidogenic and clastogenic potential of the mycotoxins citrinin and patulin.

E Pfeiffer, K Gross and M Metzler

in Carcinogenesis

Volume 19, issue 7, pages 1313-1318
Published in print July 1998 | ISSN: 0143-3334
Published online July 1998 | e-ISSN: 1460-2180 | DOI: http://dx.doi.org/10.1093/carcin/19.7.1313
Aneuploidogenic and clastogenic potential of the mycotoxins citrinin and patulin.

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The aneuploidogenic and clastogenic potentials of the mycotoxins citrinin (CIT) and patulin (PAT) were studied by determining inhibition of microtubule assembly under cell-free conditions and by measuring induction of mitotic arrest and micronuclei in cultured Chinese hamster V79 cells. Both CIT and PAT inhibited cell-free microtubule polymerization in a concentration-dependent manner. PAT, but not CIT, bound covalently to reactive thiol groups of microtubule proteins. At concentrations without gross cytotoxicity, mitotic arrest and CREST-positive micronuclei, i.e. micronuclei containing whole chromosomes/chromatids, were induced by CIT and PAT in V79 cells. The time course of micronucleus induction and positive CREST staining indicate the aneuploidogenic potential of CIT and PAT. CREST-negative micronuclei, i.e. micronuclei containing acentric chromosomal fragments, were induced by PAT but not by CIT, implying a clastogenic potential of PAT. The aneuploidogenic and clastogenic potential of PAT and the aneuploidogenic potential of CIT may well contribute to the putative carcinogenicity of these mycotoxins in long-term animal studies.

Journal Article.  0 words. 

Subjects: Clinical Cytogenetics and Molecular Genetics

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