HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

Role of the Cdc25A phosphatase in human breast cancer.

Abstract
The phosphatase Cdc25A plays an important role in cell cycle regulation by removing inhibitory phosphates from tyrosine and threonine residues of cyclin-dependent kinases, and it has been shown to transform diploid murine fibroblasts in cooperation with activated Ras. Here we show that Cdc25A is overexpressed in primary breast tumors and that such overexpression is correlated with higher levels of cyclin-dependent kinase 2 (Cdk2) enzymatic activity in vivo. Furthermore, in the breast cancer cell line MCF-7, Cdc25A activity is necessary for both the activation of Cdk2 and the subsequent induction of S-phase entry. Finally, in a series of small (< 1 cm) breast carcinomas, overexpression of Cdc25A was found in 47% of patients and was associated with poor survival. These data suggest that overexpression of Cdc25A contributes to the biological behavior of primary breast tumors and that both Cdc25A and Cdk2 are suitable therapeutic targets in early-stage breast cancer.
AuthorsM G Cangi, B Cukor, P Soung, S Signoretti, G Moreira Jr, M Ranashinge, B Cady, M Pagano, M Loda
JournalThe Journal of clinical investigation (J Clin Invest) Vol. 106 Issue 6 Pg. 753-61 (Sep 2000) ISSN: 0021-9738 [Print] United States
PMID10995786 (Publication Type: Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, U.S. Gov't, P.H.S.)
Chemical References
  • Oligonucleotides, Antisense
  • RNA, Messenger
  • Protein Serine-Threonine Kinases
  • CDC2-CDC28 Kinases
  • CDK2 protein, human
  • Cyclin-Dependent Kinase 2
  • Cyclin-Dependent Kinases
  • CDC25A protein, human
  • cdc25 Phosphatases
Topics
  • Breast Neoplasms (enzymology, genetics, mortality, pathology)
  • CDC2-CDC28 Kinases
  • Cyclin-Dependent Kinase 2
  • Cyclin-Dependent Kinases (metabolism)
  • Databases, Factual
  • Enzyme Activation
  • Female
  • Gene Expression Regulation, Neoplastic
  • Histocytochemistry
  • Humans
  • Immunoblotting
  • In Situ Hybridization
  • Oligonucleotides, Antisense (genetics)
  • Phosphorylation
  • Precipitin Tests
  • Protein Serine-Threonine Kinases (metabolism)
  • RNA, Messenger (analysis, genetics)
  • Retrospective Studies
  • Reverse Transcriptase Polymerase Chain Reaction
  • S Phase (genetics)
  • Survival Rate
  • Time Factors
  • Transfection
  • Tumor Cells, Cultured
  • cdc25 Phosphatases (antagonists & inhibitors, genetics, metabolism)

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: