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Updated: Aug 8, 2026

Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer
Published on: April 13, 2015
Telomerase inhibition, oligonucleotides, and clinical trials
1Department of Pharmacology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, TX 75390-9041, USA. david.corey@utsothwestern.edu
Abstract:
Telomerase is expressed in most types of tumors but not in most somatic cells. This observation has led to two hypotheses; (i) telomerase activity is necessary for the proliferation of cancer cells; and (ii) telomerase inhibitors are a powerful strategy for cancer chemotherapy. Testing the latter hypothesis requires the development of potent and selective inhibitors of telomerase and their testing in clinical trials. Assaying the efficacy of telomerase inhibitors will not be simple because telomere erosion will be slow and antiproliferative effects will probably require weeks to become apparent. This review will describe the properties of 2'-O-alkyl oligonucleotide inhibitors of telomerase. Oligonucleotides that block expression of other cancer targets have favorable pharmacokinetic properties and are already in clinical trials. This experience is likely to facilitate clinical trials of anti-telomerase oligomers.
Insights
Telomerase is active in most tumors, suggesting telomerase inhibitors could treat cancer. This review explores 2'-O-alkyl oligonucleotide inhibitors for cancer chemotherapy, drawing parallels with similar drug trials.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Telomerase is expressed in most tumors but not normal somatic cells.
- This suggests telomerase activity is crucial for cancer cell proliferation.
- Telomerase inhibitors represent a potential cancer chemotherapy strategy.
Purpose of the Study:
- To review the properties of 2 -O-alkyl oligonucleotide inhibitors of telomerase.
- To discuss the challenges and potential of using telomerase inhibitors in cancer treatment.
- To highlight the feasibility of clinical trials for anti-telomerase oligomers.
Main Methods:
- Review of existing literature on telomerase inhibitors, specifically 2 -O-alkyl oligonucleotides.
- Analysis of pharmacokinetic properties of oligonucleotide-based therapeutics.
- Comparison with clinical trial data of oligonucleotide inhibitors targeting other cancer mechanisms.
Main Results:
- 2 -O-alkyl oligonucleotides show promise as telomerase inhibitors.
- Oligonucleotides targeting other cancer genes have demonstrated favorable pharmacokinetics.
- Previous clinical trial experience with similar oligonucleotides facilitates potential anti-telomerase trials.
Conclusions:
- Telomerase inhibitors are a promising avenue for cancer chemotherapy.
- 2 -O-alkyl oligonucleotide inhibitors offer a specific strategy to target telomerase.
- Existing knowledge of oligonucleotide drug delivery and trials supports the development of anti-telomerase therapies.
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