Beckers, Thomas and Reissmann, Thomas and Schmidt, Mathias and Burger, Angelika M. and Fiebig, Heinz H. and Vanhoefer, Udo and Pongratz, Herwig and Hufsky, Harald and Hockemeyer, Jörg and Frieser, Markus and Mahboobi, Siavosh (2002) 2-aroylindoles, a novel class of potent, orally active small molecule tubulin inhibitors. CANCER RESEARCH, 62 (11). pp. 3113-3119. ISSN 0008-5472, 1538-7445
Full text not available from this repository. (Request a copy)Abstract
2-Aroylindoles with 5-methoxy-1H-2-indolyl-phenylmethanone (D-64131) as the lead structure were discovered as a new class of synthetic, small molecule tubulin inhibitors. By competitively binding with [3 H]colchicine to alphabeta-tubulin and inhibiting microtubule formation, cycling cells were arrested in the G(2)-M phase of the cell division cycle. The proliferation of tumor cells from 12 of 14 different organs and tissues was inhibited with mean IC(50)s of 62 nM and 24 nM by D-64131 and D-68144, respectively, comparable with the potency of paclitaxel with mean IC50 of 10 nM. By measuring the cytotoxicity in a human colon carcinoma cell model with ectopic eedysone-inducible expression of the cyclin-dependent kinase inhibitor p21(WAF1), specificity toward cycling cells was demonstrated. In contrast to microtubule inhibitors from natural sources, 2-aroylindoles did not alter the polymerization-dependent GTPase activity of beta-tubulin and are not substrates of the multidrug resistance/multidrug resistance protein efflux pump. No cross-resistance toward cell lines with multidrug resistance/multidrug resistance protein independent resistance phenotypes became evident. In animal studies, no signs of systemic toxicity were observed after p.o. dosages of up to 400 mg/kg of D-64131. In xenograft experiments with the human amelanoic melanoma MEXF 989, D-64131 was highly active with treatment resulting in a growth delay of 23.4 days at 400 mg/kg. Therefore, D-64131 and analogues have the potential to be developed for cancer therapy, replacing or supplementing standard therapy regimens with tubulin-targeting drugs from natural sources.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BETA-TUBULIN; MICROTUBULE DYNAMICS; CELL-LINES; IN-VIVO; AGENTS; PACLITAXEL; POLYMERIZATION; RESISTANCE; BINDING; DERIVATIVES; |
| Subjects: | 600 Technology > 615 Pharmacy |
| Divisions: | Chemistry and Pharmacy > Institute of Pharmacy > Pharmaceutical/Medicinal Chemistry I (Prof. Elz) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Oct 2021 10:53 |
| Last Modified: | 25 Oct 2021 10:53 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40177 |
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