title: Mutation and allelic loss of the p53 gene in endometrial carcinoma. Incidence and outcome in 92 surgical patients.
abstract: BACKGROUND
  Alterations of the p53 gene are involved in the development of diverse human malignancies, but their incidence and clinicopathologic features are still not well characterized for endometrial carcinoma.
  
  
  METHODS
  To investigate the clinicopathologic significance of p53, mutations and loss of heterozygosity (LOH) in endometrial carcinoma in 92 patients with this disease were examined.
  
  
  RESULTS
  Mutations of p53 were detected in 20 (22%) of the 92 patients with carcinoma, and LOH was detected in 23 (32%) of the 72 patients in whom heterozygosity of the gene was available. There was a significant correlation between the occurrence of mutation and LOH. Mutations and LOH were more frequent in patients with Grade 3 tumors than in those with Grades 1 and 2 tumors (P = 0.0498, P = 0.0051, respectively). Patients with LOH had a poorer postoperative survival than those without LOH (P = 0.0022, log-rank test), and patients with both LOH and mutation showed the worst prognosis (P < 0.0001, log rank test). Loss of heterozygosity of the p53 gene showed a significant relation to prognosis that was independent of tumor stage, histologic grade, and muscular invasion.
  
  
  CONCLUSIONS
  Mutation and LOH of the p53 gene are prognostic indicators in patients with endometrial carcinoma, suggesting that alterations of p53 may play an important role in the development of this cancer.
authors.affiliation: Department of Obstetrics and Gynecology, Ehime University School of Medicine, Shigenobu, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kihana
authors.forename: K
authors.initials: K
authors.lastname: Hamada
authors.forename: Y
authors.initials: Y
authors.lastname: Inoue
authors.forename: N
authors.initials: N
authors.lastname: Yano
authors.forename: H
authors.initials: H
authors.lastname: Iketani
authors.forename: S
authors.initials: S
authors.lastname: Murao
authors.forename: M
authors.initials: M
authors.lastname: Ukita
authors.forename: S
authors.initials: S
authors.lastname: Matsuura
mesh_terms: D000483:Alleles; D001483:Base Sequence; D002277:Carcinoma / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D004273:DNA, Neoplasm / Q000032:analysis; D004714:Endometrial Hyperplasia / Q000235:genetics / Q000401:mortality / Q000473:pathology; D016889:Endometrial Neoplasms / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D005260:Female; D016158:Genes, p53 / Q000235:genetics*; D006801:Humans; D015994:Incidence; D008969:Molecular Sequence Data; D009154:Mutation; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D011379:Prognosis; D016016:Proportional Hazards Models; D016019:Survival Analysis
chemical_list: D004273:DNA, Neoplasm