Optimization of Amide-Based Inhibitors of Soluble Epoxide Hydrolase with Improved Water Solubility
作者:In-Hae Kim、Fenton R. Heirtzler、Christophe Morisseau、Kosuke Nishi、Hsing-Ju Tsai、Bruce D. Hammock
DOI:10.1021/jm0500929
日期:2005.5.1
Soluble epoxide hydrolase (sEH) plays an important role in the metabolism of endogenous chemical mediators involved in the regulation of blood pressure and inflammation. 1,3-Disubstituted ureas with a polar group located on the fifth atom from the carbonyl group of urea function are active inhibitors of sEH both in vitro and in vivo. However, their limited solubility in water and relatively high melting point lead to difficulties in formulating the compounds and poor in vivo efficacy. To improve these physical properties, the effect of structural modification of the urea pharmacophore on the inhibition potencies, water solubilities, octanol/water partition coefficients (log P), and melting points of a series of compounds was evaluated. For murine sEH, no loss of inhibition potency was observed when the urea pharmacophore was modified to an amide function, while for human sEH 2.5-fold decreased inhibition was obtained in the amide compounds. In addition, a NH group on the right side of carbonyl group of the amide pharmacophore substituted with an adamantyl group (such as compound 14) and a methylene carbon present between the adamantyl and amide groups were essential to produce potent inhibition of sEH. The resulting amide inhibitors have 10-30-fold better solubility and lower melting point than the corresponding urea compounds. These findings will facilitate synthesis of sEH inhibitors that are easier to formulate and more bioavailable.
1,3-Disubstituted Ureas Functionalized with Ether Groups are Potent Inhibitors of the Soluble Epoxide Hydrolase with Improved Pharmacokinetic Properties
作者:In-Hae Kim、Hsing-Ju Tsai、Kosuke Nishi、Takeo Kasagami、Christophe Morisseau、Bruce D. Hammock
DOI:10.1021/jm070705c
日期:2007.10.1
Solubleepoxidehydrolase (sEH) is a therapeutic target for treating hypertension and inflammation. 1,3-Disubstituted ureas functionalized with an ether group are potent sEH inhibitors. However, their relatively low metabolic stability leads to poor pharmacokinetic properties. To improve their bioavailability, we investigated the effect of incorporating various polar groups on the ether function on