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Platinum(II) Complexes with Dipyridophenazine Ligands as Human Telomerase Inhibitors and Luminescent Probes for G-Quadruplex DNA
Abstract
A series of platinum(II) complexes containing dipyridophenazine (dppz) and C-deprotonated 2-phenylpyridine (N-CH) ligands were prepared and assayed for G-quadruplex DNA binding activities. [PtII(dppz-COOH)(N-C)]CF3SO3 (1; dppz-COOH = 11-carboxydipyrido[3,2-a:2',3'-c]phenazine) binds G-quadruplex DNA through an external end-stacking mode with a binding affinity of approximately 10(7) dm3 mol-1. G-quadruplex DNA binding is accompanied by up to a 293-fold increase in the intensity of photoluminescence at lambdamax = 512 nm. Using a biotinylated-primer extension telomerase assay, 1 was shown to be an effective inhibitor of human telomerase in vitro, with a telIC50 value of 760 nM.
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Metadata
- Authors
- Ma, D.-L., Che, C.-M., & Yan, S.-C.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-11-08
- Volume
- 131
- Issue
- 5
- Pages
- 1835-1846
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2026950328
- Cited by
- 289
- References
- 71
- FWCI
- 12.17
- Type
- journal article
- Language
- en
- Open access
- closed
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