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The HIF/PHF8/AR axis promotes prostate cancer progression
1Department of Urology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, PR China.
Oncogenesis
|December 20, 2016
Summary
Hypoxia activates HIF transcription factors, inducing PHF8 expression in prostate cancer. This PHF8 protein then enhances androgen receptor signaling, promoting cancer growth and potentially serving as a therapeutic target.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Androgen receptor (AR) signaling remains active in castration-resistant prostate cancer (CRPC), but the mechanisms are unclear.
- Understanding CRPC progression is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the role of plant homeo domain finger protein 8 (PHF8) in CRPC.
- To elucidate the regulatory mechanisms of PHF8 expression and its impact on AR signaling.
Main Methods:
- Investigated PHF8 interaction with AR.
- Assessed PHF8's histone demethylase activity.
- Examined PHF8 expression under hypoxic conditions in prostate cancer cell lines.
- Analyzed the effect of HIF1α and HIF2α knockdown on PHF8 expression.
- Correlated PHF8 expression with clinical data from prostate cancer patients.
Main Results:
- PHF8 acts as a histone demethylase-dependent AR coactivator.
- Hypoxia induces PHF8 expression via HIF1α and HIF2α.
- PHF8 is highly expressed in androgen-deprived prostate cancer samples.
- Elevated PHF8 correlates with higher cancer grade and poor outcomes.
Conclusions:
- The hypoxia-inducible factor (HIF)/PHF8/AR axis drives CRPC progression.
- PHF8 is a potential biomarker for CRPC.
- Targeting the HIF/PHF8/AR pathway offers a promising therapeutic strategy for CRPC.
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