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Telomerase, immortality and cancer.
G Krupp1, G Bonatz, R Parwaresch
1Institute for Hematopathology, Center for Pathology and Applied Cancer Research, Christian-Albrechts-University, Kiel, Germany. GKRUPP@PATH.UNI-KIEL.DE
Biotechnology Annual Review
|February 24, 2001
Summary
Telomerase, an enzyme that maintains telomeres, is active in embryonic and regenerative human cells, and cancer cells. Its activity is crucial for cellular proliferation and potentially for tumor development and therapy.
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- Eukaryotic chromosome replication is incomplete, leading to terminal gaps.
- Telomeres and the enzyme telomerase are evolutionary solutions to the end replication problem.
- Telomerase is active in human embryonic tissues, germ cells, regenerative tissues, and tumor cells.
Purpose of the Study:
- To compare the significance of proliferation markers (Ki-67, repp-86) with telomerase assays for disease prognosis.
- To explore the therapeutic potential of telomerase inhibitors in cancer.
- To investigate the applications of telomerase stimulation for cellular proliferation in vitro.
Main Methods:
- Semiquantitative telomerase assays.
- Detection of proliferation markers using monoclonal antibodies (Ki-67, repp-86).
- Analysis of telomerase knock-out mice models.
Main Results:
- Telomerase activation is a mandatory step in carcinogenesis.
- Telomerase inhibitors show promise but also risks in tumor therapy.
- Telomerase stimulation is beneficial for in vitro cell expansion and tissue engineering.
Conclusions:
- Telomerase plays a critical role in cellular proliferation, cancer, and aging.
- Targeting telomerase offers potential therapeutic strategies for cancer.
- Telomerase modulation has significant implications for regenerative medicine and biotechnology.