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RhoC GTPase Activation Assay
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CK2-NCoR signaling cascade promotes prostate tumorigenesis
Jung-Yoon Yoo1, Beom Jin Lim, Hyo-Kyoung Choi
1Department of Biochemistry and Molecular Biology, Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul 120-752, Korea.
Oncotarget
|May 15, 2013
Summary
Casein kinase 2 (CK2) activity and NCoR phosphorylation are elevated in prostate cancer, driving tumor growth and poor survival. Inhibiting this pathway reduces tumor progression and improves patient outcomes.
Area of Science:
- Molecular Oncology
- Cancer Biology
- Biochemistry
Background:
- Aberrant expression of casein kinase 2 (CK2) is observed in prostate cancer.
- Detailed mechanisms linking CK2 to prostate tumorigenesis remain unclear.
Purpose of the Study:
- Investigate the role of CK2 activity and NCoR phosphorylation in prostate cancer progression.
- Elucidate the CK2-NCoR signaling pathway's impact on tumorigenesis and patient survival.
Main Methods:
- Compared CK2 activity and NCoR phosphorylation in various prostate cancer cell lines (DU145, PC-3) and normal cells (RWPE1, LNCaP).
- Assessed the effect of CK2 inhibition on NCoR phosphorylation, IP-10 gene expression, cell invasion, and in vivo tumor growth.
- Correlated CK2-mediated NCoR phosphorylation with clinicopathological data and patient survival.
Main Results:
- CK2 activity and NCoR phosphorylation were significantly higher in androgen-independent prostate cancer cells.
- Increased NCoR phosphorylation inversely correlated with interferon-γ-inducible protein 10 (IP-10) mRNA levels.
- CK2 inhibition reduced NCoR phosphorylation, repressed IP-10 transcription, decreased cell invasion, and inhibited tumor growth in vivo.
- Elevated CK2-mediated NCoR phosphorylation correlated with poor patient survival.
Conclusions:
- CK2-mediated NCoR phosphorylation represents a key oncogenic pathway in prostate cancer.
- Targeting the CK2-NCoR network, potentially through IP-10 derepression, offers a therapeutic strategy.
- This pathway is a significant prognostic marker for prostate cancer patient survival.
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