Format

Send to

Choose Destination
See comment in PubMed Commons below
Curr Med Chem. 2005;12(26):3091-102.

Telomerase inhibition and cancer: might platinum based drugs have a future as anti-telomerase pharmacological approach?

Author information

  • 1Dipartimento di Scienze dell'Ambiente e della Vita, Universit√† degli Studi del Piemonte Orientale "A. Avogadro", Spalto Marengo 33, I-15100 Alessandria, Italy.

Abstract

Telomerase is a ribonucleoprotein polymerase that maintains the length of telomeric DNA by adding hexameric units (TTAGGG) to the ends of the chromosomes. This mechanism prevents replicative senescence, thus conferring unlimited proliferative potential to cells. Telomerase reactivation has been detected in most human tumour tissue, indicating that the enzyme may be useful as a specific tumour marker. The inhibition of telomerase causes a progressive and critical reduction of telomeres, leading to a potent signal for the blockage of cell proliferation and the induction of apoptosis. Since normal somatic cells lack telomerase activity, the anti-telomerase approach is highly specific for tumour cells and metastases. Prolonged treatment is required before enzyme deactivation causes the telomeres to be shortened enough to induce senescence and apoptosis. Therefore, the drugs employed in anti-telomerase therapy should be of only moderate non-specific cytotoxicity. Certain cis-Pt(II)-complexes have recently been shown to be effective inhibitors of telomerase in both cell-free and in vitro assays, most likely by targeting the nucleobases of the RNA component of the enzyme.

PMID:
16375703
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Bentham Science Publishers Ltd.
    Loading ...
    Support Center