Structure-activity relationships of triazole-benzodioxine inhibitors of cathepsin X
作者:Urša Pečar Fonović、Damijan Knez、Martina Hrast、Nace Zidar、Matic Proj、Stanislav Gobec、Janko Kos
DOI:10.1016/j.ejmech.2020.112218
日期:2020.5
Cathepsin X is a cysteine carboxypeptidase that is involved in various physiological and pathological processes. In particular, highly elevated expression and activity of cathepsin X has been observed in cancers and neurodegenerative diseases. Previously, we identified compound Z9 (1-(2,3-dihydrobenzo [b][1,4]dioxin-6-yl)-2-((4-isopropyl-4H-1,2,4-triazol-3-yl)thio)ethan-1-one) as a potent and specific reversible cathepsin X inhibitor. Here, we have explored the effects of chemical variations to Z9 of either benzodioxine or triazol moieties, and the importance of the central ketomethylenethio linker. The ketomethylenethio linker was crucial for cathepsin X inhibition, whereas changes of the triazole heterocycle did not alter the inhibitory potencies to a greater extent. Replacement of benzodioxine moiety with substituted benzenes reduced cathepsin X inhibition. Overall, several synthesized compounds showed similar or improved inhibitory potencies against cathepsin X compared to Z9, with IC50 values of 7.1 mu M-13.6 mu M. Additionally, 25 inhibited prostate cancer cell migration by 21%, which is under the control of cathepsin X. (c) 2020 Published by Elsevier Masson SAS.