Novel selective human mitochondrial kinase inhibitors: Design, synthesis and enzymatic activity
作者:Nunzia Ciliberti、Stefano Manfredini、Angela Angusti、Elisa Durini、Nicola Solaroli、Silvia Vertuani、Lisa Buzzoni、Maria Cruz Bonache、Efrat Ben-Shalom、Anna Karlsson、Ann Saada、Jan Balzarini
DOI:10.1016/j.bmc.2007.01.049
日期:2007.4
Selective and effective TK2 inhibitors can be obtained by introduction of bulky lipophilic chains (acyl or alkyl entities) at the 2' position of araT and BVaraU, nucleoside analogues naturally endowed with a low TK2 affinity. These derivatives showed a competitive inhibitory activity against TK2 in micromolar range. BVaraU nucleoside analogues, modified on the 2'-O-acyl chain with a terminal N-Boc amino-group, conserved or increased the inhibitory activity against TK2 (71 and 7m IC50: 6.4 and 3.8 mu M, respectively). The substitution of an ester for a carboxamide moiety at the 2' position of araT afforded a consistent reduction of the inhibitory activity (25, IC50: 480 mu M). On the contrary, modifications at 2'-OH position of araC and araG, have provided inactive derivatives against TK2 and dGK, respectively. The biological activity of a representative compound, 2'-O-decanoyl-BVaraU, was also investigated in normal human fibroblasts and was found to impair mitochondrial function due to TK2 inhibition. (c) 2007 Published by Elsevier Ltd.