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Dolušić, Eduard; Larrieu, Pierre; Moineaux, Laurence; Stroobant, Vincent; Pilotte, Luc; Colau, Didier; Pochet, Lionel; Van den Eynde, Benoît; Masereel, Bernard; Wouters, Johan; Frédérick, Raphaël
Journal of medicinal chemistry, 08/2011, Letnik: 54, Številka: 15Journal Article
Tryptophan catabolism mediated by indoleamine 2,3-dioxygenase (IDO) is an important mechanism of peripheral immune tolerance contributing to tumoral immune resistance. IDO inhibition is thus an active area of research in drug development. Recently, our group has shown that tryptophan 2,3-dioxygenase (TDO), an unrelated hepatic enzyme also catalyzing the first step of tryptophan degradation, is also expressed in many tumors and that this expression prevents tumor rejection by locally depleting tryptophan. Herein, we report a structure–activity study on a series of 3-(2-(pyridyl)ethenyl)indoles. More than 70 novel derivatives were synthesized, and their TDO inhibitory potency was evaluated. The rationalization of the structure–activity relationships (SARs) revealed essential features to attain high TDO inhibition and notably a dense H-bond network mainly involving His55 and Thr254 residues. Our study led to the identification of a very promising compound (58) displaying good TDO inhibition (K i = 5.5 μM), high selectivity, and good oral bioavailability. Indeed, 58 was chosen for preclinical evaluation.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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