Decreased expression of p57(KIP2) mRNA in human bladder cancer

M. Oya, W. A. Schulz

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

To identify targets of genetic and epigenetic alterations on chromosome 11p15.5 in human bladder cancer, expression of the imprinted KIP2, IGF2 and H19 genes was studied by quantitative RT-PCR in 24 paired samples of urothelial carcinomas and morphologically normal mucosa obtained by cystectomy, and in bladder carcinoma cell lines. The most frequent alteration in tumour tissue was decreased expression of KIP2 identified in 9/24 (37%) specimens. Decreased IGF2 and H19 mRNA levels were found in five (21%) and three (13%) tumours, respectively. One tumour each overexpressed IGF2 and H19. Loss of H19 expression was only found associated with loss of KIP2 expression, whereas decreased expression of IGF2 mRNA occurred independently. Almost all bladder carcinoma cell lines showed significant changes in the expression of at least one gene with diminished expression of KIP2 mRNA as the most frequent alteration. IGF2 mRNA levels were diminished in several lines, but increased in others. The KIP2 gene could be an important target of genetic and epigenetic alterations in bladder cancer affecting the maternal chromosome 11p15.5. However, reminiscent of the situation in Wilms' tumours, expression of the IGF2 gene on the paternal chromosome can also be disturbed in bladder cancers. (C) 2000 Cancer Research Campaign.

Original languageEnglish
Pages (from-to)626-631
Number of pages6
JournalBritish Journal of Cancer
Volume83
Issue number5
DOIs
Publication statusPublished - 2000
Externally publishedYes

Keywords

  • Chromosome 11p15.5
  • H19
  • IGF-II
  • LOH analysis
  • Quantitative RT-PCR

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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