金黄色葡萄球菌是医院和社区获得性感染的最常见原因之一,耐药菌株每年导致数万人死亡。金黄色葡萄球菌分选酶 A 抑制剂旨在干扰毒力决定因素。我们已经确定二硫烷基苯甲酰胺是一类新型有效的分选酶 A 抑制剂,通过活性位点半胱氨酸的共价修饰发挥作用。合成了一系列广泛的衍生物来推导构效关系(SAR)。体外和计算机方法使实验观察到的结合亲和力和选择性合理化。研究发现,最活跃的化合物具有个位数的微摩尔 Ki 值,在 10 μM 的有效抑制剂浓度下,金黄色葡萄球菌纤维蛋白原附着量减少高达 66%。这种新分子类别表现出最小的细胞毒性、较低的细菌生长抑制和分选酶介导的金黄色葡萄球菌细胞粘附受损。
discover new antiprotozoal agents, ten novel p-nitrobenzenesulphonamide derivatives incorporating dipeptide moiety were synthesized by the condensation reaction of 3-methyl-2-(4- nitrophenylsulphonamido)pentanoic acid (6) with substituted acetamides (4a-j) using peptide coupling reagents, characterized using 1H and 13C NMR, FTIR, HRMS and investigated for their antimalarial and antitrypanosomal activities
Synthesis, molecular docking and antimalarial activity of phenylalanine-glycine dipeptide bearing sulphonamide moiety
作者:Babatunde S. Aronimo、Uchechukwu C. Okoro、Rafat Ali、Collins U. Ibeji、James A. Ezugwu、David I. Ugwu
DOI:10.1016/j.molstruc.2021.131201
日期:2021.12
Discovery and SAR of a Series of Agonists at Orphan G Protein-Coupled Receptor 139
作者:Feng Shi、Jing Kang Shen、Danqi Chen、Karina Fog、Kenneth Thirstrup、Morten Hentzer、Jens-Jakob Karlsson、Veena Menon、Kenneth A. Jones、Kelli E. Smith、Garrick Smith
DOI:10.1021/ml100293q
日期:2011.4.14
GPR139 is an orphan G-protein coupled receptor (GPCR) Which is primarily expressed in the central nervous system (CNS). In order to explore the biological function of this receptor, selective tool compounds are required. A screening campaign identified compound 1a as a high potency PR139 agonist with an EC(50) = 39 nM in a calcium mobilization assay in CHO-K1 cells stably expressing the GPR139 receptor. In the absence of a known endogenous ligand, the maximum effect was set as 100% for 1a. Screening against 90 diverse targets revealed no cross-reactivity issues. Assessment of the pharmacokinetic properties showed limited utility,as in vivo tool compound in rat with a poor whole brain exposure of 61 ng/g and a brain/plasma (b/p) ratio of 0.03. Attempts to identify a more suitable analogue identified the des-nitrogen analogue is with a reduced polar surface area of 76.7 angstrom(2) and an improved b/p ratio of 2.8. The whole brain exposure remained low at 95 ng/g due to a low plasma exposure.
MELANOCORTIN RECEPTOR LIGANDS
申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP1165613B1
公开(公告)日:2008-04-30
New isoleucine derived dipeptides as antiprotozoal agent: Synthesis, in silico and in vivo studies.
作者:Ogechi C. Ekoh、Uchechukwu C. Okoro、Rafat Ali、David I. Ugwu、Sunday N. Okafor、James A. Ezugwu
DOI:10.1016/j.molstruc.2021.130017
日期:2021.5
aceturate. In the antimalarialstudy, 11b was the most active compound, even better than the standard. Molecular docking result suggests good interaction between the reported compounds and the target protein. The results of haematological analysis, liver and kidney function tests showed that the compounds had no adverse effect on the blood and organs. Compound 11b stands out among the derivatives haven shown