Telomerase: biology and phase I trials

Area of Science:

• Molecular Biology
• Oncology
• Biochemistry

Background:

• Telomeres, the protective caps of chromosomes, naturally shorten with cell division in somatic cells.
• Tumor cells often reactivate telomerase, a reverse transcriptase enzyme, to maintain telomere length and achieve immortality.
• Telomere and telomerase research has implications for cancer diagnosis, prognosis, tissue engineering, and therapeutic strategies.

Purpose of the Study:

• To explore the role of telomere maintenance in cancer.
• To evaluate telomerase inhibition as a potential cancer therapeutic strategy.
• To discuss the applications of telomere and telomerase research in medicine.

Main Methods:

• Review of existing research on telomere dynamics and telomerase activity.
• Analysis of data from mouse knockout, hTERT dominant negative, and antisense experiments.
• Examination of various telomerase inhibitory strategies, including antisense molecules, reverse transcriptase inhibitors, and G-quadruplex stabilizers.

Main Results:

• Telomerase reactivation is a hallmark of tumor cells, enabling their continuous proliferation.
• Experimental models suggest telomerase inhibitors possess anticancer activity, especially in tumors with critically short telomeres.
• Multiple strategies for telomerase inhibition are under investigation.

Conclusions:

• Telomerase is a validated target for anticancer drug development.
• Telomerase inhibitors offer a promising therapeutic avenue, particularly for specific cancer types.
• Clinical trials for telomerase inhibitors require careful design and consideration compared to conventional chemotherapy.