title: Absence of ras family point mutations at codons 12, 13 and 61 in N-ethyl-N-hydroxyethylnitrosamine- or N-nitrosomorpholine-induced renal cell tumors in rats.
abstract: The prevalence of Ki-ras, Ha-ras and N-ras point mutation within exons 1 and 2 was studied in 17 cases of renal cell tumors (8 carcinomas and 9 adenomas) induced by N-ethyl-N-hydroxyethyl-nitrosamine or N-nitrosomorpholine. DNA samples prepared from acetone-fixed, paraffin-embedded tissues were amplified by means of the polymerase chain reaction, and point mutations at codons 12, 13 and 61 were analyzed by direct sequence methods with oligonucleotide primers. No mutations were detected in any of the renal tumors. The results thus indicated that ras family point mutation is not necessary for kidney tumor development in rats, supporting the view that ras mutations may not be generally relevant to neoplastic development in various organs in different species.
authors.affiliation: Second Department of Pathology, Fujita Health University School of Medicine, Aichi.
authors.forename: K
authors.initials: K
authors.lastname: Matsumoto
authors.forename: H
authors.initials: H
authors.lastname: Tsuda
authors.forename: T
authors.initials: T
authors.lastname: Iwase
authors.forename: M
authors.initials: M
authors.lastname: Ito
authors.forename: Y
authors.initials: Y
authors.lastname: Nishida
authors.forename: F
authors.initials: F
authors.lastname: Oyama
authors.forename: K
authors.initials: K
authors.lastname: Titani
authors.forename: T
authors.initials: T
authors.lastname: Ushijima
authors.forename: M
authors.initials: M
authors.lastname: Nagao
authors.forename: I
authors.initials: I
authors.lastname: Hirono
mesh_terms: D000236:Adenoma / Q000139:chemically induced / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D002273:Carcinogens; D002292:Carcinoma, Renal Cell / Q000139:chemically induced / Q000235:genetics*; D004052:Diethylnitrosamine / Q000031:analogs & derivatives; D005091:Exons; D011905:Genes, ras; D007680:Kidney Neoplasms / Q000139:chemically induced / Q000235:genetics*; D008297:Male; D008969:Molecular Sequence Data; D009602:Nitrosamines; D017354:Point Mutation; D016133:Polymerase Chain Reaction; D051381:Rats; D011916:Rats, Inbred F344; D017208:Rats, Wistar
chemical_list: D002273:Carcinogens; D009602:Nitrosamines; C023845:N-ethyl-N-hydroxyethylnitrosamine; D004052:Diethylnitrosamine; C002741:N-nitrosomorpholine