Synthesis and preliminary evaluation of amiloride analogs as inhibitors of the urokinase-type plasminogen activator (uPA)
摘要:
A known side-activity of the oral potassium-sparing diuretic drug amiloride is inhibition of the enzyme urokinase-type plasminogen activator (uPA, K-i = 7 mu M), a promising anticancer target. Several studies have demonstrated significant antitumor/metastasis properties for amiloride in animal cancer models and it would appear that these arise, at least in part, through inhibition of uPA. Selective optimization of amiloride's structure for more potent inhibition of uPA and loss of diuretic effects would thus appear as an attractive strategy towards novel anticancer agents. The following report is a preliminary structure-activity exploration of amiloride analogs as inhibitors of uPA. A key finding was that the well-studied 5-substituted analogs ethylisopropyl amiloride (EIPA) and hexamethylene amiloride (HMA) are approximately twofold more potent than amiloride as uPA inhibitors. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis and preliminary evaluation of amiloride analogs as inhibitors of the urokinase-type plasminogen activator (uPA)
作者:Hayden Matthews、Marie Ranson、Joel D.A. Tyndall、Michael J. Kelso
DOI:10.1016/j.bmcl.2011.09.044
日期:2011.11
A known side-activity of the oral potassium-sparing diuretic drug amiloride is inhibition of the enzyme urokinase-type plasminogen activator (uPA, K-i = 7 mu M), a promising anticancer target. Several studies have demonstrated significant antitumor/metastasis properties for amiloride in animal cancer models and it would appear that these arise, at least in part, through inhibition of uPA. Selective optimization of amiloride's structure for more potent inhibition of uPA and loss of diuretic effects would thus appear as an attractive strategy towards novel anticancer agents. The following report is a preliminary structure-activity exploration of amiloride analogs as inhibitors of uPA. A key finding was that the well-studied 5-substituted analogs ethylisopropyl amiloride (EIPA) and hexamethylene amiloride (HMA) are approximately twofold more potent than amiloride as uPA inhibitors. (C) 2011 Elsevier Ltd. All rights reserved.
Amiloride as a new RNA-binding scaffold with activity against HIV-1 TAR
作者:Neeraj N. Patwardhan、Laura R. Ganser、Gary J. Kapral、Christopher S. Eubanks、Janghyun Lee、Bharathwaj Sathyamoorthy、Hashim M. Al-Hashimi、Amanda E. Hargrove
DOI:10.1039/c6md00729e
日期:——
dimethylamiloride from a weak TAR ligand to one of the tightest binding selective TAR ligands reported to date through a novel combination of synthetic methods and analytical techniques. We expect these methods to allow for rapid library expansion and tuning of the amiloride scaffold for a range of RNA targets and for SOFAST NMR to allow unprecedented evaluation of small molecule:RNA interactions.