title: [The pre- and postnatal carcinogenic effect of 3,3-diethyl-1-methyl-1-nitrosourea (DEMNU) in rats following intravenous application].
abstract: The pre- and postnatal administration of DEMNU induces a high frequency of tumors when applied via the intravenous route, and the latency periods show a dose dependence (table I). Tumors of the brain, spinal cord and cranial nerves clearly predominate. Furthermore, a large number of neoplasms of kidney, heart and soft tissue was observed (table II). As DEMNU is per se a very stable compound, it is suggested that this agent is metabolized by monooxygenases. 3-Ethyl-1-methyl-1-nitrosourea should be formed as an intermediate product via this pathway, which is relatively stable and might explain the mainly neurotropic carcinogenicity of DEMNU. Species differences in the carcinogenicity of trialkyl-nitrosoureas and the mode of metabolic activation are discussed.
authors.affiliation: Institut für Pathologische Anatomie der Medizinischen Akademie Erfurt, DDR.
authors.forename: U
authors.initials: U
authors.lastname: Wagner
authors.forename: D
authors.initials: D
authors.lastname: Schreiber
authors.forename: R
authors.initials: R
authors.lastname: Thust
authors.forename: M
authors.initials: M
authors.lastname: Schneider
mesh_terms: D000818:Animals; D005260:Female; D007275:Injections, Intravenous; D008297:Male; D008782:Methylurea Compounds / Q000008:administration & dosage / Q000633:toxicity; D009374:Neoplasms, Experimental / Q000139:chemically induced* / Q000473:pathology; D009607:Nitrosourea Compounds / Q000008:administration & dosage / Q000633:toxicity*; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors
chemical_list: D008782:Methylurea Compounds; D009607:Nitrosourea Compounds; C064827:N,N-diethyl-N'-methylurea; C026466:diethylmethylnitrosourea
vernacular_title: Prä- und postnatale kanzerogene Wirkung von 3,3-Diethyl-1-methyl-1-nitrosoharnstoff (DEMNH) bei Ratten nach intravenöser Applikation.