title: No allelic loss at the p53 locus in 1,2-dimethylhydrazine-induced mouse colon tumours: PCR-SSCP analysis with sequence-tagged microsatellite site primers.
abstract: We examined allelic loss in colon tumors induced by 1,2-dimethylhydrazine (DMH) in F1 hybrid mice, using sequence-tagged microsatellite site (STMS) primers derived from the chromosomal region closely linked to the p53 locus. Polymerase chain reaction--single-strand conformation polymorphism (PCR-SSCP) analysis of 155 colonic tumors with two STMS markers revealed that no genetic alterations had occurred in these tumors, except for one case where one of the markers detected an increase of one CA repeat unit in one allele. No allelic loss at the loci closely linked to the p53 locus strongly suggests that allelic loss at the p53 locus is not involved in DMH-induced colon carcinogenesis in mice.
authors.affiliation: Department of Laboratory Animal Science, Tokyo Metropolitan Institute of Medical Science, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Okamoto
authors.forename: H
authors.initials: H
authors.lastname: Ohtsu
authors.forename: M
authors.initials: M
authors.lastname: Miyaki
authors.forename: H
authors.initials: H
authors.lastname: Yonekawa
mesh_terms: D019813:1,2-Dimethylhydrazine; D000483:Alleles; D000818:Animals; D001483:Base Sequence; D002273:Carcinogens; D003110:Colonic Neoplasms / Q000139:chemically induced / Q000235:genetics*; D003433:Crosses, Genetic; D004276:DNA, Satellite; D004127:Dimethylhydrazines; D017353:Gene Deletion; D016158:Genes, p53; D051379:Mice; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D016324:Sequence Tagged Sites
chemical_list: D002273:Carcinogens; D004276:DNA, Satellite; D004127:Dimethylhydrazines; D019813:1,2-Dimethylhydrazine