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Updated: Jan 10, 2026

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Identification of genes targeted by the androgen and PKA signaling pathways in prostate cancer cells

G Wang1, S J M Jones, M A Marra

  • 1Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada.

Oncogene
|June 6, 2006
PubMed

Insights

This study reveals how androgen and protein kinase A (PKA) pathways affect prostate cancer cell transcription. Limited gene cross-talk was observed between androgen receptor (AR) and PKA signaling pathways.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Genomics

Background:

  • Prostate cancer progression to androgen independence is linked to androgen and protein kinase A (PKA) signaling.
  • Understanding the transcriptional changes in these pathways is crucial for cancer treatment.

Purpose of the Study:

  • To identify transcriptomes associated with androgen and PKA pathways in prostate cancer cells.
  • To discover common transcriptional targets regulated by both pathways.
  • To investigate the cross-talk between androgen receptor (AR) and PKA signaling.

Main Methods:

  • Utilized Affymetrix GeneChip technology (Human Genome U133 plus2) to analyze transcriptomes.
  • Employed GeneSpring software for statistical analysis of gene expression changes.
  • Validated gene expression using reverse transcriptase-polymerase chain reaction and Western blot analyses.
  • Used small interfering RNAs (siRNAs) to investigate androgen receptor (AR) regulation.

Main Results:

  • Identified 858 genes affected by androgen signaling and 303 genes by PKA pathway activation.
  • Validated 22 genes as transcriptional targets of androgen and/or PKA pathways.
  • Found that AR, activated by both androgen and PKA, regulates KLK3, KLK2, and SESN1 expression.
  • Determined that SESN1 is repressed by activated AR.

Conclusions:

  • Provided a comprehensive view of androgen and PKA pathway effects on prostate cancer cell transcription.
  • Demonstrated limited cross-talk between AR and PKA signaling pathways, targeting a small number of genes.
  • Highlighted the regulatory role of AR in genes like KLK2 and SESN1 in response to combined signaling.

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