title: In vivo studies in Syrian golden hamsters: a transplacental bioassay of ten nitrosamines.
abstract: The carcinogenic effects of low doses of 10 nitrosamines were determined in pregnant Syrian golden hamsters and their offspring. Compounds studied included dimethylnitrosamine, di-n-propylnitrosamine, di-n-butylnitrosamine, nitrosopiperidine, nitrosohexamethyleneimine, 2-dydroxypropyl-propyl-nitrosamine, 2-oxopropyl-propyl-nitrosamine, methylpropylnitrosamine, di(2-hydroxypropyl) nitrosamine, and 4-hydroxybutyl-butyl-nitrosamine. Tumor incidences of all organ systems were almost always higher and latencies shorter in the mothers than in the offspring. Exceptions occurred in the respiratory system in which several compounds induced a low incidence of tumors in the offspring but none in the mothers. Fetal susceptibility appeared greatest toward the end of gestation. For purposes of bioassay, transplacental exposure was less efficient than conventional adult treatment.
mesh_terms: D000818:Animals; D006224:Cricetinae; D004353:Drug Evaluation, Preclinical / Q000379:methods; D004700:Endocrine System Diseases / Q000139:chemically induced; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000139:chemically induced; D005865:Gestational Age; D008297:Male; D008431:Maternal-Fetal Exchange; D008647:Mesocricetus; D009374:Neoplasms, Experimental / Q000139:chemically induced*; D009383:Neoplasms, Vascular Tissue / Q000139:chemically induced; D009602:Nitrosamines / Q000008:administration & dosage*; D011247:Pregnancy; D012142:Respiratory Tract Neoplasms / Q000139:chemically induced; D014565:Urogenital Neoplasms / Q000139:chemically induced
chemical_list: D009602:Nitrosamines