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Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer
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Published on: April 13, 2015

2-5A antisense directed against telomerase RNA produces apoptosis in ovarian cancer cells

D M Kushner1, J M Paranjape, B Bandyopadhyay

  • 1Department of Gynecology & Obstetrics, The Cleveland Clinic Foundation, Cleveland, Ohio, 44195, USA.

Gynecologic Oncology
|January 19, 2000
PubMed
Abstract

Insights

Targeting telomerase RNA with 2-5A antisense oligonucleotides induces programmed cell death in ovarian cancer cells. This novel approach offers a promising strategy for cancer therapy by selectively eliminating cancer cells while sparing normal cells.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Ovarian Cancer Therapeutics

Background:

  • RNase L activation is triggered by 2',5'-oligoadenylates (2-5A).
  • Antisense oligonucleotides can be engineered to target specific RNA molecules.
  • Telomerase is a key enzyme in cellular immortalization and is often overexpressed in cancer.

Purpose of the Study:

  • To investigate the efficacy of 2-5A antisense oligonucleotides targeting telomerase RNA (hTR) in ovarian cancer cells.
  • To evaluate the selective toxicity of this approach in ovarian cancer cells versus normal ovarian epithelial cells.

Main Methods:

  • HEY-1B ovarian cancer cells and normal ovarian epithelial cells (NOE) were analyzed for RNase L and telomerase activity.
  • Cells were treated with chimeric 2-5A antisense oligonucleotides targeting hTR or control oligonucleotides.
  • Apoptosis was assessed using the TUNEL assay, and cell viability was determined after treatment.

Main Results:

  • HEY-1B cells exhibited telomerase activity, while NOE cells did not.
  • Treatment with 2-5A antisense oligonucleotides targeting hTR led to significant cell death in HEY-1B cells but not in NOE cells.
  • A decrease in telomerase activity and induction of apoptosis were observed in HEY-1B cells treated with the targeted 2-5A antisense.

Conclusions:

  • 2-5A antisense targeting telomerase RNA induces selective apoptosis in ovarian cancer cells.
  • This strategy demonstrates potential as a targeted cancer therapy, offering advantages over conventional antisense approaches.

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