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Updated: Oct 5, 2026

Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer
08:34

Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer

Published on: April 13, 2015

A low threshold level of expression of mutant-template telomerase RNA inhibits human tumor cell proliferation

M M Kim1, M A Rivera, I L Botchkina

  • 1Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143-0448, USA.

Proceedings of the National Academy of Sciences of the United States of America
|July 5, 2001
PubMed

Insights

Introducing a novel cancer therapy, this study shows that expressing mutant-template telomerase RNAs in cancer cells inhibits tumor growth and proliferation. This telomerase-based strategy offers a promising new avenue for cancer treatment.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Genetics

Background:

  • Telomerase is a ribonucleoprotein enzyme essential for synthesizing telomeric DNA.
  • Telomerase activity is frequently upregulated in various cancer cells, contributing to their uncontrolled proliferation.
  • Targeting telomerase presents a potential strategy for cancer therapy.

Purpose of the Study:

  • To investigate the potential of expressing mutant-template telomerase RNAs as an antitumor strategy.
  • To evaluate the effect of mutant-template telomerase RNA expression on cancer cell viability, apoptosis, and tumor growth.

Main Methods:

  • Expression of mutant-template human telomerase RNAs in human prostate (LNCaP) and breast (MCF-7) cancer cell lines.
  • Assessment of cellular viability and apoptosis following expression of mutant telomerase RNAs.
  • Evaluation of tumor xenograft growth rates in vivo in mice bearing cancer cells expressing mutant telomerase RNA.

Main Results:

  • Low-level expression of mutant-template telomerase RNAs, but not wild-type, significantly decreased cancer cell viability and increased apoptosis.
  • These effects occurred independently of endogenous telomerase activity and telomere length.
  • In vivo studies demonstrated reduced tumor growth rates in xenografts expressing mutant-template telomerase RNA.

Conclusions:

  • Mutant-template telomerase RNAs exert a dominant-negative effect on cancer cell proliferation and tumor growth.
  • This approach shows potential as a novel antineoplastic strategy.
  • Further research into mutant-template telomerase RNA expression is warranted for cancer treatment development.

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