title: The mutagenicity of benzimidazole and benzimidazole derivatives. VI. Cytogenetic effects of benzimidazole derivatives in the bone marrow of the mouse and the Chinese hamster.
abstract: Methyl benzimidazole-2-ylcarbamate (MBC) was mutagenic in mice by the micro-nucleus test. Other benzimidazole derivatives, with the exception of the parent compound of MBC, benomyl, and the very closely related substance 2-benzimidazolylurea, did not produce micro-nuclei in mouse bone marrow. Evidence is presented that MBC acts through inhibition of mitosis and that for this action the carbamoyl group is a necessary but not a sufficient condition. It is also demonstrated that for this particular type of mutagenic activity a threshold limit exists, which seems to be in the order of less than 10 mug MBC per ml blood.
mesh_terms: D000818:Animals; D001562:Benzimidazoles / Q000494:pharmacology*; D001853:Bone Marrow / Q000187:drug effects / Q000648:ultrastructure; D001854:Bone Marrow Cells; D002467:Cell Nucleus / Q000187:drug effects; D002869:Chromosome Aberrations; D005821:Genetic Techniques; D051379:Mice; D008938:Mitosis; D009153:Mutagens
chemical_list: D001562:Benzimidazoles; D009153:Mutagens