Mutation analysis of the p51 gene and correlation between p53, p73, and p51 expressions in prostatic carcinoma

Hiroyuki Takahashi, Kazuo Fukutome, Masatoshi Watanabe, Masakuni Furusato, Taizo Shiraishi, Haruo Ito, Hiroyoshi Suzuki, Shuntaro Ikawa, Hiroshi Hano

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


BACKGROUND. p73 and p51 are genes possessing amino-acid similarities to p53. We previously found no mutation in p73 in prostatic carcinoma, but did find abnormal expression of the gene. Involvement of these genes in prostatic carcinogenesis is still poorly understood. METHODS. Mutation analysis of the p51 gene and allelotyping of 3q28, on which p51 lies, were performed. Expression of p53, p73, and p51 was examined using reverse transcription-polymerase chain reaction, and expression levels were compared. RESULTS. No mutation in p51 was found (0/55 cases). Loss of heterozygosity at 3q28 was detected in 6 of 28 cases (21.8%). By expression analysis we found that in p53, 4 of 38 cases (10.5%) showed downregulation. No cases showed upregulation of p53. In contrast, p73 and p51 were downregulated in 42.1 and 39.5% of cases, respectively, and upregulated in 31.5 and 34.2% of cases, respectively. Expression levels of p51 corresponded with those of p73 in 25 of 38 cases (65.8%). CONCLUSIONS. Somatic mutations in p73 and p51 are not important in prostatic carcinogenesis. These genes may be associated with tumors by expression levels and may have roles in addition to tumor suppression.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
Issue number2
Publication statusPublished - 2001 May 1


  • Prostatic carcinoma
  • mRNA expression
  • p51
  • p53
  • p73

ASJC Scopus subject areas

  • Oncology
  • Urology


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