title: The effect of hycanthone and maleic hydrazide on the frequency of micronuclei in the bone-marrow erythrocytes of mice.
abstract: Male Swiss mice were assigned to 6 groups of either 3 or 4 animals each. 3 groups were given hycanthone methanesulfonate intraperitoneally, at 40, 80 or 120 mg/kg, respectively; the dose was repeated after an interval of about 24 h. At the same time 2 groups received maleic hydrazide at 100 or 200 mg/kg, and the remaining group was given dimethyl sulfoxide which was used as a solvent for both drugs. 6 h after the second injection, the mice were killed and bonemarrow preparations were made. Hycanthone induced a significant increase in the frequency of micronuclei in the polychromatic erythrocytes and suppressed the P/N ratio significantly. However, there was no dose-response relationship. Maleic hydrazide, on the other hand, failed to influence the incidence of micronuclei or the ratio of poly- to normo-chromatic erythrocytes.
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000187:drug effects / Q000648:ultrastructure; D002467:Cell Nucleus / Q000187:drug effects* / Q000648:ultrastructure; D004305:Dose-Response Relationship, Drug; D004912:Erythrocytes / Q000187:drug effects* / Q000648:ultrastructure; D005821:Genetic Techniques; D006826:Hycanthone / Q000494:pharmacology*; D008297:Male; D008300:Maleic Hydrazide / Q000494:pharmacology*; D051379:Mice; D009153:Mutagens; D011724:Pyridazines / Q000494:pharmacology*; D013892:Thioxanthenes / Q000494:pharmacology*
chemical_list: D009153:Mutagens; D011724:Pyridazines; D013892:Thioxanthenes; D006826:Hycanthone; D008300:Maleic Hydrazide