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首页> 外文期刊>Bioorganic and medicinal chemistry >5-Bromoindirubin 3′-( O- oxiran-2-ylmethyl)oxime: A long-acting anticancer agent and a suicide inhibitor for epoxide hydrolase
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5-Bromoindirubin 3′-( O- oxiran-2-ylmethyl)oxime: A long-acting anticancer agent and a suicide inhibitor for epoxide hydrolase

机译:5-Bromoindirubin 3′-( O- oxiran-2-ylmethyl)oxime: A long-acting anticancer agent and a suicide inhibitor for epoxide hydrolase

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Graphical abstract Display Omitted Abstract Indirubin 3′-oxime (Indox ( 1b )) suppresses cancer cell growth (IC 50 : 15 μM towards HepG2 cells) and inhibits cell cycle-related kinases such as cyclin-dependent kinases and glycogen synthase kinase-3β. We have previously reported that the conjugation of 1b with oxirane, a protein-reactive component, enhanced the cytotoxic activity of Indox as determined from the IC 50 value (1.7 μM) of indirubin 3′-( O -oxiran-2-ylmethyl)oxime (Epox/Ind ( 1c )). Here we prepared Epox/Ind derivatives with one or two halogen atoms or a methoxy group on the aromatic ring(s) of an Indox moiety and studied the structure-activity relationships of the substituent(s). We found that bromine-substitution at the 5-position on 1c or any Epox/Ind derivative(s) having bromine on the aromatic ring except Epox/6′-Br-Ind was efficient to improving anticancer activity. Of the 22 Epox/Ind derivatives, 5-bromoindirubin 3′-( O -oxiran-2-ylmethyl)oxime (Epox/5-Br-Ind ( 2c )) was the best anticancer agent in both short- (24 h) (IC 50 : 0.67 μM) and extended-duration (72 h) cultures. The high anticancer activity of 2c was partly due to it being a poor substrate and a suicide inhibitor for epoxide hydrolase as epoxide hydrolase was identified as the enzyme primarily responsible for the metabolism of 2c . >

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