int-2 and c-erbB-2 gene amplification detected in 70 frozen human breast carcinomas by quantitative polymerase chain reaction

Anticancer Res. Jul-Aug 1997;17(4B):3133-6.


Gene amplification is a common mechanism of proto-oncogene activation and contributes to tumor progression. Analysis of such genetic alterations is relevant to our understanding of tumor genetics and can provide prognostic information for the patients. A rapid, non-radioactive approach based on qdPCR and fluorescent DNA technique was applied for determination of int-2 and c-erbB2 gene amplification and correlated with other prognostic factors in 70 breast cancer samples. ER and PgR were analysed by immunohistochemistry. The mixed template assay showed 96% concordance between calculated and measured gene copy number. int-2 gene and c-erbB2 amplification were both found in 24% of the tumors. The amplification did not correlate with any of the other prognostic factors. 8% of the tumors showed amplification of both genes without significant correlations to any of the other parameters. The fd-PCR assay is a valuable tool for determination of amplification of int-2 and c-erbB2 genes. Therefore, more detailed information about individual tumour biology and outcome may be acquired by this routine assay and probably provide prognostic impact.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Breast Neoplasms / genetics*
  • Female
  • Fibroblast Growth Factor 3
  • Fibroblast Growth Factors / genetics*
  • Freezing
  • Genes, erbB-2*
  • Humans
  • Polymerase Chain Reaction*
  • Proto-Oncogene Proteins / genetics*
  • Proto-Oncogenes*


  • FGF3 protein, human
  • Fibroblast Growth Factor 3
  • Proto-Oncogene Proteins
  • Fibroblast Growth Factors