Cdc25A Protein Phosphatase: A Therapeutic Target for Liver Cancer Therapies

Author(s): Z. Wang , S. Kar , B. I. Carr .

Journal Name: Anti-Cancer Agents in Medicinal Chemistry

Volume 8 , Issue 8 , 2008

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Abstract:

Cdc25A, a dual specificity protein phosphatase, is well-recognized as a critical regulator for cell cycle progression. We recently found that it also regulates mitogen-activated protein kinase (MAPK) signal transduction pathway. Inhibition of Cdc25A activity by a K vitamin analog Compound 5 (Cpd 5) can induce a strong and prolonged activation of epidermal growth factor receptor (EGFR)- MAPK pathway, which leads to suppression of transcription factors CREB and c-Myc, resulting in decreased expression of Cdc25A and cyclin D1 levels. Our investigations suggest that Cdc25A plays a central role in regulating and linking cell cycle progression and MAPK signal transduction pathways. Several other recently synthesized K vitamin analogs also affect this pathway, including the non-quinone PM20 and fluoro-Cpd 5. Thus, searching for new and efficient small molecules to inhibit Cdc25A activity may provide new means to control cancers of the liver and other sites.

Keywords: Hepatoma, Cdc25A, compound 5, protein phosphatases, cell growth inhibition, MAP kinase, cell cycle, tyrosine phosphorylation

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Article Details

VOLUME: 8
ISSUE: 8
Year: 2008
Page: [863 - 871]
Pages: 9
DOI: 10.2174/187152008786847675
Price: $58

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