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5,5′-substituted indirubin-3′-oxime derivatives as potent cyclin-dependent kinase inhibitors with anticancer activity
- 5,5′-substituted indirubin-3′-oxime derivatives as potent cyclin-dependent kinase inhibitors with anticancer activity
- Choi S.-J.; Lee J.-E.; Jeong S.-Y.; Im I.; Lee S.-D.; Lee E.-J.; Lee S.K.; Kwon S.-M.; Ahn S.-G.; Yoon J.-H.; Han S.-Y.; Kim J.-I.; Kim Y.-C.
- Ewha Authors
- Issue Date
- Journal Title
- Journal of Medicinal Chemistry
- Journal of Medicinal Chemistry vol. 53, no. 9, pp. 3696 - 3706
- SCIE; SCOPUS
- Document Type
- To enhance the ability of indirubin derivatives to inhibit CDK2/cyclin E, a target of anticancer agents, we designed and synthesized a new series of indirubin-3′-oxime derivatives with combined substitutions at the 5 and 5′ positions. A molecular docking study predicted the binding of derivatives with OH or halogen substitutions at the 5′ position to the ATP binding site of CDK2, revealing the critical interactions that may explain the improved CDK2 inhibitory activity of these derivatives. Among the synthesized derivatives, the 5-nitro-5′-hydroxy analogue 3a and the 5-nitro-5′-fluoro analogue 5a displayed potent inhibitory activity against CDK2, with IC50 values of 1.9 and 1.7 nM, respectively. These derivatives also showed antiproliferative activity against several human cancer cell lines, with IC50 values of 0.2-3.3 μM. A representative analogue, 3a, showed greater than 500-fold selectivity for CDK relative to selected kinase panel and potent in vivo anticancer activity. © 2010 American Chemical Society.
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