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Shchekotikhin AE, Shtil AA, Luzikov YN, Bobrysheva TV, Buyanov VN, Preobrazhenskaya MN: 3-Aminomethyl derivatives of 4,11-dihydroxynaphtho [2,3-f] indole-5,10-dione for circumvention of anticancer drug resistance. Bioorg Med Chem. 2005 Mar 15;13(6):2285-91.
A series of 3-aminomethyl derivatives of 4,11-dihydroxynaphtho [2,3-f] indole-5,10-dione was synthesized by Mannich reaction or by the transamination of 3-dimethylaminomethyl 4,11-dihydroxy- or 4,11-dimethoxynaphtho [2,3-f] indole-5,10-dione. The potency of novel derivatives was tested on a National Cancer Institute panel of 60 human tumor cell lines as well as in cells with genetically defined determinants of cytotoxic drug resistance, P-glycoprotein (Pgp) expression, and p53 inactivation. Mannich derivatives of 4,11-dihydroxynaphtho [2,3-f] indole-5,10-dione with an additional amino function in their side chain, demonstrated equal cytotoxicity against the parental K562 leukemia cells and their Pgp-positive subline, whereas the latter showed approximately 7-fold resistance to adriamycin, a Pgp transported drug. 3-(1-Piperazinyl) methyl and 3-(quinuclidin-3-yl) aminomethyl derivatives of 4,11-dihydroxynaphtho [2,3-f] indole-5,10-dione killed HCT116 colon carcinoma cells (carrying wild type p53) and their p53-null variant within the similar range of concentrations. We conclude that Mannich modification of 4,11-dihydroxynaphtho [2,3-f] indole-5,10-dione, especially when cyclic diamine (e.g., piperazine, quinuclidine) is used, confers an important feature to the resulting compounds, namely, the potency for tumor cells otherwise resistant to a variety of anticancer drugs. |
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