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Fibroblast growth factor receptor 3 mutations in bladder tumors correlate with low frequency of chromosome

Kerstin Junker1, Johanna M M van Oers, Ellen C Zwarthoff

  • 1Department of Urology, Friedrich-Schiller-University, Jena, Germany. kerstin.junker@med.uni-jena.de

Neoplasia (New York, N.Y.)
|January 31, 2008
PubMed

Insights

Fibroblast growth factor receptor 3 (FGFR3) mutations are common in early-stage bladder cancer. These mutations correlate with fewer genetic alterations, indicating a lower risk and better prognosis.

Area of Science:

  • Urology
  • Oncology
  • Molecular Biology

Background:

  • Bladder cancer exhibits diverse genetic alterations.
  • Fibroblast growth factor receptor 3 (FGFR3) is frequently implicated in tumorigenesis.

Purpose of the Study:

  • To investigate FGFR3 mutation distribution across bladder tumor grades and stages.
  • To correlate FGFR3 mutations with chromosomal aberrations via comparative genomic hybridization (CGH).

Main Methods:

  • Manual microdissection of 100 bladder cancer samples.
  • DNA isolation and SNaPshot analysis for FGFR3 mutations.
  • Comparative genomic hybridization (CGH) for chromosomal alterations.

Main Results:

  • FGFR3 mutations found in 48.9% of samples.
  • Higher mutation frequency in non-invasive (pTa) and low-grade (G1) tumors (74% in pTaG1).
  • FGFR3 mutations associated with significantly fewer genetic alterations (2 vs. 8).

Conclusions:

  • FGFR3 mutations identify non-invasive, low-risk bladder tumors.
  • These mutations correlate with genetic stability and low malignant potential.
  • FGFR3 serves as a prognostic marker for genetically stable bladder tumors.

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