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Down-regulation of androgen-receptor and PSA by phytochemicals

Sophie Chen1, Jian Gao, H Dorota Halicka

  • 1Department of Medicine, New York Medical College, Valhalla, NY 10595, USA. s.chen@opcart-lab.org

International Journal of Oncology
|January 19, 2008
PubMed

Insights

Three compounds from PC-SPES, including oridonin, isoliquiritigenin, and wogonin, show anticancer activity by affecting cell proliferation, apoptosis, and androgen receptor (AR) signaling in hormone-resistant prostate cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Androgen receptor (AR) signaling remains active in hormone-resistant prostate cancer (HRPC), driving aberrant transcription.
  • AR is a key therapeutic target in HRPC.
  • PC-SPES has demonstrated activity against HRPC, partly by down-regulating AR protein and modulating the cell cycle.

Purpose of the Study:

  • To investigate the effects of three specific compounds (oridonin, isoliquiritigenin, and wogonin) identified from PC-SPES.
  • To evaluate their impact on cell proliferation, apoptosis, cell cycle, and AR/PSA protein expression in HRPC.

Main Methods:

  • Cell proliferation assays.
  • Apoptosis assays.
  • Cell cycle analysis.
  • Western blot analysis for AR and PSA protein expression.

Main Results:

  • Oridonin, isoliquiritigenin, and wogonin each demonstrated independent anticancer effects.
  • These compounds influenced cell proliferation and apoptosis.
  • Modulation of cell cycle parameters was observed.
  • Effects on androgen receptor (AR) and prostate-specific antigen (PSA) protein expression were noted.

Conclusions:

  • Oridonin, isoliquiritigenin, and wogonin possess distinct biological activities relevant to HRPC treatment.
  • These individual compound activities may contribute to the overall efficacy of PC-SPES.
  • Further research into these compounds could yield novel therapeutic strategies for HRPC.

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