title: [Mutation of p53 gene and genomic instability in testicular tumors].
abstract: BACKGROUND
  During the past decade, studies of human cancer have begun to yield molecular information on the identify of the multiple genetic changes in the development and progression of tumorigenesis. We investigated alterations of p53 and genomic instability in testicular tumors.
  
  
  METHODS
  Polymerase chain reaction (PCR) single-strand conformation polymorphism was performed for analysis from exons 5 to 8 of p53 gene in 22 cases and PCR-microsatellite instability analysis using 8 microsatellite markers were conducted in 19 cases of testicular tumor.
  
  
  RESULTS
  No mutations were noted for exons 5 to 8 of the p53 gene. Differences in unrelated microsatellites for tumor and corresponding normal DNA were detected in 5 of 19 (26.3%) cases examined. Alterations noted in more than 2 microsatellites were observed in 3 of 19 (15.8%) and categorized as replication error (RER) phenotype. Two of 7 (28.6%) seminomatous and 1 of 12 (8.3%) non-seminomatous testicular tumors patients showed RER. Two of 16 (12.5%) stage T1-3N0M0 and 1 of 3 (33.3%) stage T1-3N1-3M0-1 showed RER.
  
  
  CONCLUSIONS
  Alterations in microsatellite instability may be involved in the development of testicular tumor.
authors.affiliation: Department of Urology, Kitasato University School of Medicine.
authors.forename: C
authors.initials: C
authors.lastname: Wang
authors.forename: T
authors.initials: T
authors.lastname: Uchida
authors.forename: T
authors.initials: T
authors.lastname: Satoh
authors.forename: A
authors.initials: A
authors.lastname: Irie
authors.forename: S
authors.initials: S
authors.lastname: Soh
authors.forename: M
authors.initials: M
authors.lastname: Iwamura
authors.forename: M
authors.initials: M
authors.lastname: Ohori
authors.forename: K
authors.initials: K
authors.lastname: Koshiba
mesh_terms: D004261:DNA Replication; D016158:Genes, p53 / Q000235:genetics*; D006801:Humans; D019656:Loss of Heterozygosity; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics*; D009154:Mutation; D010641:Phenotype; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D013736:Testicular Neoplasms / Q000235:genetics*