New 2-(1-adamantylcarbonyl)pyridine and 1-acetyladamantane thiosemicarbazones–thiocarbonohydrazones: cell growth inhibitory, antiviral and antimicrobial activity evaluation
作者:Antonios Kolocouris、Kostas Dimas、Christophe Pannecouque、Myriam Witvrouw、George B. Foscolos、George Stamatiou、George Fytas、Grigoris Zoidis、Nicolas Kolocouris、Graciela Andrei、Robert Snoeck、Erik De Clercq
DOI:10.1016/s0960-894x(01)00838-1
日期:2002.3
The new thiosemicarbazones and thiocarbonohydrazones 4a-d, 5a-d derived from 2-(1-adamantylcarbonyl)pyridine and 1-acetyladamantane were synthesized and evaluated for their inhibitory effect on tumor cell proliferation and their antiviral and antimicrobial activity. Thiosemicarbazone 4a inhibited tumor cell proliferation (GI50's range: 2.4-100 muM and mean GI50 43.9 muM against various human leukemic cell lines) while thiosemicarbazone 5a and thiocarbonohydrazone 5d exhibited significant inhibition of tumor cell proliferation (GI50's range 2.3-23.6 muM and mean GI50 7.2 muM for 5a and GI50's range 2.4-32.4 muM and mean GI50 12.8 muM for 5d). These GI50 values are comparable to that of 2-acetylpyridine thiosemicarbazone an important lead in TSCS family. The compounds did not afford specific activity against any of the viruses tested when examined at non-toxic concentrations. A weak activity was found for thiocarbonohydrazones 4d, 5d against Gram-(+) bacteria (MIC50 117.3 and 133 muM, respectively). Using a combination of molecular mechanics calculations and NOE spectroscopy it was shown that the parent compounds 4a and 5a have opposite configuration around C=N bond. Whether this difference in structure can be correlated with the biological activity will be investigated in future studies. (C) 2002 Elsevier Science Ltd. All rights reserved.