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Water-soluble benzoheterocycle triosmium clusters as potential inhibitors of telomerase enzyme
- Source :
-
Journal of Inorganic Biochemistry . Feb2005, Vol. 99 Issue 2, p505-512. 8p. - Publication Year :
- 2005
-
Abstract
- Abstract: We have studied the ability of several bioorganometallic clusters [(μ-H)Os3(CO)9(L)(μ3-η2-(Q-H))], where L=[P(C6H4SO3Na)3] or [P(OCH2CH2NMe3I)3], and Q=quinoline, 3-aminoquinoline, quinoxaline or phenanthridine, of inhibiting telomerase, a crucial enzyme for cancer progression. In general, quinolines have shown interesting biological properties, especially in inhibiting enzymes. For example, the 2,3,7-trichloro-5-nitroquinoxaline (TNQX) exhibited strong anti-telomerase activity in vitro. Among the quinoline-clusters under study, only the negatively charged ones (by virtue of the sulfonated phosphines) exhibited good anti-telomerasic activity on semi-purified enzyme in a cell-free assay, while they were ineffective in vitro on Taq, a different DNA-polymerase. On the contrary, the treatment of breast cancer MCF-7 cell line did not evidence any activity of these clusters, suggesting a low aptitude for crossing cell membrane. Furthermore, all clusters exhibited non-specific, acute cytotoxicy, probably due to accumulation on cell membranes by virtue of their amphiphilic character. A detailed study of Os uptake and accumulation in MCF-7 cells supported this hypothesis. [Copyright &y& Elsevier]
- Subjects :
- *QUINOLINE
*CHLOROQUINE
*HYDROXYQUINOLINE
*QUINOXALINES
*TELOMERASE
Subjects
Details
- Language :
- English
- ISSN :
- 01620134
- Volume :
- 99
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Inorganic Biochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 15670929
- Full Text :
- https://doi.org/10.1016/j.jinorgbio.2004.10.027