title: [Effect of age, castration and pregnancy on carcinogenesis, induced by 1,2-dimethylhydrazine, in CBA mice].
abstract: Subcutaneous injection of 1,2-dimethylhydrazine into female CBA mice once a week resulted in the development of tumours of the colon, anal region, uterus and liver. In 12-13-month-old mice treated with DMH an earlier appearance (week 8) of uterine sarcomas and more rapid increase in the incidence of tumours of the anal region were noted as compared to 3-month-old mice. In pregnant females treated with DMH a statistically significant decrease in the uterine sarcoma incidence was observed (10.3% versus 48.3% in nonpregnant). Pregnancy exerted no effect on the incidence of tumours at other sites. Castration did not affect the time of appearance and the incidence of tumours of any site.
mesh_terms: D000236:Adenoma / Q000139:chemically induced; D000367:Age Factors; D000375:Aging; D000818:Animals; D002369:Castration; D003110:Colonic Neoplasms / Q000139:chemically induced; D004127:Dimethylhydrazines; D005260:Female; D006391:Hemangioma / Q000139:chemically induced; D008113:Liver Neoplasms / Q000139:chemically induced; D008175:Lung Neoplasms / Q000139:chemically induced; D051379:Mice; D008808:Mice, Inbred CBA; D009374:Neoplasms, Experimental / Q000139:chemically induced*; D010051:Ovarian Neoplasms / Q000139:chemically induced; D011247:Pregnancy; D011270:Pregnancy, Animal; D012513:Sarcoma, Experimental / Q000139:chemically induced; D014594:Uterine Neoplasms / Q000139:chemically induced
chemical_list: D004127:Dimethylhydrazines
vernacular_title: Vliianie vozrasta, kastratsii i beremennosti na kantserogenez, indutsiruemyĭ 1,2-dimetilgidrazinom u mysheĭ linii CBA.