title: No concomitant occurrence of the N-ras and p53 gene mutations in myelodysplastic syndromes.
abstract: Mutations of the N-ras oncogene and p53 tumor suppressor gene were simultaneously investigated in bone marrow cells from 44 patients with myelodysplastic syndrome (MDS) or MDS-derived leukemia by single-strand conformation polymorphism (SSCP) analysis followed by direct sequencing. The mutations of the N-ras gene were detected only in two cases with MDS-derived leukemia. Three patients with MDS-derived leukemia and one with refractory anemia with excess of blasts exhibited five mutations of the p53 gene. No concomitant mutations of both genes were observed in our study, suggesting that alterations of both genes could play an important role in the progression of MDS in a non-cooperative manner.
authors.affiliation: Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Bunkyo-ku, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Mitani
authors.forename: A
authors.initials: A
authors.lastname: Hangaishi
authors.forename: N
authors.initials: N
authors.lastname: Imamura
authors.forename: K
authors.initials: K
authors.lastname: Miyagawa
authors.forename: S
authors.initials: S
authors.lastname: Ogawa
authors.forename: Y
authors.initials: Y
authors.lastname: Kanda
authors.forename: Y
authors.initials: Y
authors.lastname: Yazaki
authors.forename: H
authors.initials: H
authors.lastname: Hirai
mesh_terms: D000753:Anemia, Refractory / Q000235:genetics; D000754:Anemia, Refractory, with Excess of Blasts / Q000235:genetics; D001853:Bone Marrow / Q000473:pathology; D005091:Exons; D016158:Genes, p53; D011905:Genes, ras; D006801:Humans; D015477:Leukemia, Myelomonocytic, Chronic / Q000235:genetics; D009190:Myelodysplastic Syndromes / Q000235:genetics* / Q000276:immunology / Q000473:pathology; D017354:Point Mutation; D016133:Polymerase Chain Reaction / Q000379:methods; D018807:Polymorphism, Single-Stranded Conformational