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Isolation of Cancer Stem Cells From Human Prostate Cancer Samples
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Isolation of Cancer Stem Cells From Human Prostate Cancer Samples

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The effects of telomerase inhibition on prostate tumor-initiating cells

Calin O Marian1, Woodring E Wright, Jerry W Shay

  • 1Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA.

International Journal of Cancer
|November 13, 2009
PubMed

Insights

This study identified prostate tumor-initiating cells (TICs) with high telomerase activity. Telomerase inhibition using imetelstat sodium effectively targeted these TICs, suggesting a new therapeutic strategy for prostate cancer.

Area of Science:

  • Oncology
  • Cancer Biology

Background:

  • Prostate cancer, a common male malignancy, often has poor outcomes in metastatic stages.
  • Standard therapies may spare tumor-initiating cells (TICs), leading to relapse and metastasis.

Purpose of the Study:

  • To isolate and characterize prostate TICs.
  • To investigate the efficacy of telomerase inhibition on prostate TICs.

Main Methods:

  • Isolation of prostate TICs using surface markers (CD44, integrin alpha(2)beta(1), CD133), Hoechst 33342 dye exclusion, and holoclone formation.
  • Assessment of telomerase activity in isolated TICs.
  • Treatment of TICs with imetelstat sodium (GRN163L) and evaluation of telomere length.

Main Results:

  • Prostate TICs exhibited significant telomerase activity.
  • Imetelstat sodium inhibited telomerase activity in prostate TICs.
  • Telomere shortening was observed in prostate TICs following imetelstat treatment.

Conclusions:

  • Telomerase inhibition therapy, using agents like imetelstat sodium, shows promise for targeting prostate TICs.
  • This approach could offer new avenues for combination therapies in advanced prostate cancer.

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