Ethionamide Boosters. 2. Combining Bioisosteric Replacement and Structure-Based Drug Design To Solve Pharmacokinetic Issues in a Series of Potent 1,2,4-Oxadiazole EthR Inhibitors
摘要:
Mycobacterial transcriptional repressor EthR controls the expression of EthA, the bacterial monooxygenase activating ethionamide, and is thus largely responsible for the low sensitivity of the human pathogen Mycobacterium tuberculosis to this antibiotic. We recently reported structure-activity relationships of a series of 1,2,4-oxadiazole EthR inhibitors leading to the discovery of potent ethionamide boosters. Despite high metabolic stability, pharmacokinetic evaluation revealed poor mice exposure; therefore, a second phase of optimization was required. Herein a structure-property relationship study is reported according to the replacement of the two aromatic heterocycles: 2-thienyl and 1,2,4-oxadiazolyl moieties. This work was done using a combination of structure-based drug design and in vitro/ex vivo evaluations of ethionamide boosters on the targeted protein EthR and on the human pathogen Mycobacterium tuberculosis. Thanks to this process, we identified compound 42 (BDM41906), which displays improved efficacy in addition to high exposure to mice after oral administration.
Ethionamide Boosters. 2. Combining Bioisosteric Replacement and Structure-Based Drug Design To Solve Pharmacokinetic Issues in a Series of Potent 1,2,4-Oxadiazole EthR Inhibitors
摘要:
Mycobacterial transcriptional repressor EthR controls the expression of EthA, the bacterial monooxygenase activating ethionamide, and is thus largely responsible for the low sensitivity of the human pathogen Mycobacterium tuberculosis to this antibiotic. We recently reported structure-activity relationships of a series of 1,2,4-oxadiazole EthR inhibitors leading to the discovery of potent ethionamide boosters. Despite high metabolic stability, pharmacokinetic evaluation revealed poor mice exposure; therefore, a second phase of optimization was required. Herein a structure-property relationship study is reported according to the replacement of the two aromatic heterocycles: 2-thienyl and 1,2,4-oxadiazolyl moieties. This work was done using a combination of structure-based drug design and in vitro/ex vivo evaluations of ethionamide boosters on the targeted protein EthR and on the human pathogen Mycobacterium tuberculosis. Thanks to this process, we identified compound 42 (BDM41906), which displays improved efficacy in addition to high exposure to mice after oral administration.
COMPOUNDS HAVING A POTENTIATING EFFECT ON THE ACTIVITY OF ETHIONAMIDE AND USES THEREOF
申请人:Deprez Benôit
公开号:US20110136823A1
公开(公告)日:2011-06-09
The present invention relates to the use of compounds with a potentiating effect on the activity of antibiotics that are activatable via the EthA enzymatic pathway, for the preparation of a medicament for preventing and/or treating mycobacterial infections such as tuberculosis and leprosy, to pharmaceutical compositions comprising them in combination with an antibiotic that is activatable via the EthA pathway, to compounds having a potentiating effect on the activity of antibiotics that are activatable via the EthA enzymatic pathway, to pharmaceutical compositions comprising them and to their use as medicaments, especially medicaments for preventing and/or treating mycobacterial infections such as tuberculosis and leprosy.
Discovery of a Highly Potent, Selective, and Bioavailable Soluble Epoxide Hydrolase Inhibitor with Excellent Ex Vivo Target Engagement
作者:Hong C. Shen、Fa-Xiang Ding、Siyi Wang、Qiaolin Deng、Xiaoping Zhang、Yuli Chen、Gaochao Zhou、Suoyu Xu、Hsuan-shen Chen、Xinchun Tong、Vincent Tong、Kaushik Mitra、Sanjeev Kumar、Christine Tsai、Andra S. Stevenson、Lee-Yuh Pai、Magdalena Alonso-Galicia、Xiaoli Chen、Stephen M. Soisson、Sophie Roy、Bei Zhang、James R. Tata、Joel P. Berger、Steven L. Colletti
DOI:10.1021/jm900725r
日期:2009.8.27
piperidine-derived trisubstituted ureas are reported as highly potent and selective inhibitors for sEH. The SAR outlines approaches to improve activity against sEH and reduce ion channel and CYP liability. With minimal off-target activity and a good PK profile, the benchmark 2d exhibited remarkable in vitro and ex vivotargetengagement. The eutomer entA-2d also elicited vasodilation effect in rat mesenteric
据报道,4-取代的哌啶衍生的三取代脲是sEH的高效抑制剂。SAR概述了提高抗sEH活性并减少离子通道和CYP危害的方法。具有最小的脱靶活性和良好的PK分布,基准2d表现出了卓越的体外和离体靶标参与。Eutomer ent A - 2d也引起大鼠肠系膜动脉的血管舒张作用。