Abstract:
:Indirubins have been identified as potent ATP-competitive protein kinase inhibitors. Structural modifications in the 5- and 3'-position have been extensively investigated, but the impact of substituents in 5'-position is not equally well-studied. Here, we report the synthesis of new indirubin 3'- and 5'-derivatives in the search of water-soluble indirubins by introducing basic centers. Antiproliferative activity of all compounds in tumor cells was evaluated along with kinase inhibition of selected compounds. The results show the 3'-position to tolerate large substituents without compromising activity, whereas bulk and rigid substituents in 5'-position appear unfavorable. Screening molecular targets of water-soluble 3'-oxime ethers revealed 6ha as preferential inhibitor of insulin-like growth factor 1 receptor (IGF-1R) in a panel of 22 protein kinases and in cells. Consistently, 6ha inhibited tumor cell growth in the NCI 60 cell line panel and induced apoptosis. The results indicate that the 5'-position provides limited space for chemical modifications and identify 6ha as a potent water-soluble indirubin-based IGF-1R inhibitor.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Cheng X,Merz KH,Vatter S,Zeller J,Muehlbeyer S,Thommet A,Christ J,Wölfl S,Eisenbrand Gdoi
10.1021/acs.jmedchem.7b00324subject
Has Abstractpub_date
2017-06-22 00:00:00pages
4949-4962issue
12eissn
0022-2623issn
1520-4804journal_volume
60pub_type
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