- Synthesis and evaluation of novel inhibitors of pim-1 and pim-2 protein kinases
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The Pim protein kinases are frequently overexpressed in prostate cancer and certain forms of leukemia and lymphoma. 5-(3-Trifluoromethylbenzylidene) thiazolidine-2,4-dione (4a) was identified by screening to be a Pim-1 inhibitor and was found to attenuate the autophosphorylation of tagged Pim-1 in intact cells. Although 4a is a competitive inhibitor with respect to ATP, a screen of approximately 50 diverse protein kinases demonstrated that it has high selectivity for Pim kinases. Computational docking of 4a to Pim-1 provided a model for lead optimization, and a series of substituted thiazolidine-2,4-dione congeners was synthesized. The most potent new compounds exhibited IC 50s of 13 nM for Pim-1 and 2.3 μM for Pim-2. Additional compounds in the series demonstrated selectivities of more than 2500-fold and 400-fold for Pim-1 or Pim- 2, respectively, while other congeners were essentially equally potent toward the two isozymes. Overall, these compounds are new Pim kinase inhibitors that may provide leads to novel anticancer agents.
- Xia, Zuping,Knaak, Christian,Jian, Ma.,Beharry, Zanna M.,McInnes, Campbell,Wang, Wenxue,Kraft, Andrew S.,Smith, Charles D.
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experimental part
p. 74 - 86
(2009/09/25)
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- Synthesis and aldose reductase inhibitory activity of 5-arylidene-2,4-thiazolidinediones
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Several (Z)-5-arylidene-2,4- hiazolidinediones were synthesized and tested as aldose reductase inhibitors (ARIs). The most active of the N-unsubstituted derivatives (2) exerted the same inhibitory activity of Sorbinil. The introduction of an acetic side chain on N-3 of the thiazolidinedione moiety led to a marked increase in lending inhibitory activi y, conducting to the discovery of a very potent ARI (4c), whose activity level (IC50 =0.1 μM) was in the same range of Tolrestat . Moreover, the corresponding methyl esters (3), devoid of any acidic functionality, showed appreciable inhibitory activity similar to that of the N-unsubstituted compounds. It was also found that the substitution pattern on the 5-benzylidene moiety markedly influenced the activity of N-unsubstituted 2,4-thiazolidinediones 2, compounds with substituents at the meta position being generally more effective than the para-substituted ones; however, this SAR was not evidenced in acetates 3 and acids 4. Copyright
- Bruno,Costantino,Curinga,Maccari,Monforte,Nicolo,Ottana,Vigorita
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p. 1077 - 1084
(2007/10/03)
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