Discovery of novel somatostatin receptor subtype 5 (SSTR5) antagonists: Pharmacological studies and design to improve pharmacokinetic profiles and human Ether-a-go-go-related gene (hERG) inhibition
作者:Takeshi Yamasaki、Hideki Hirose、Tohru Yamashita、Nobuyuki Takakura、Sachie Morimoto、Takashi Nakahata、Asato Kina、Yoshihide Nakano、Yumiko Okano Tamura、Jun Sugama、Tomoyuki Odani、Yuji Shimizu、Shinji Iwasaki、Masanori Watanabe、Tsuyoshi Maekawa、Shizuo Kasai
DOI:10.1016/j.bmc.2017.06.003
日期:2017.8
did not show a sufficient persistent glucose-lowering effect in an OGTT; moreover, hERG inhibition was observed. Hence, further optimization study of the biphenyl moiety of compound 3k, focused on improving the pharmacokinetic (PK) profile and hERG inhibition, was conducted. Consequently, the introduction of a chlorine atom at the 6-position on the biphenyl moiety addressed a putative metabolic soft
生长抑素(SST)是一种肽激素,包含14个或28个氨基酸,可通过五个不同的G蛋白偶联受体(SSTR1-5)抑制内分泌和外分泌。SSTR5通过SST的结合在抑制胰腺和胃肠激素(例如胰岛素,GLP-1,PYY)的分泌中起重要作用。因此,SSTR5拮抗剂有望成为新型的抗糖尿病药物。在我们的SSTR5拮抗剂领先开发计划的过程中,我们发现了一种新的螺氮杂环丁烷衍生物3a。但是,对3a的药理评估表明,必须以高剂量(100 mg / kg)施用3a,才能在口服葡萄糖耐量试验(OGTT)中显示出持续的降糖效果。因此,我们启动了基于3a的优化研究旨在改善拮抗活性和平均停留时间(MRT),从而确定了2k-环丙基-5-甲氧基联苯衍生物。但是,3k在OGTT中未显示出足够的持续性降糖作用。此外,观察到hERG抑制。因此,对化合物3k的联苯部分进行了进一步的优化研究,其重点是改善药代动力学(PK)和hERG抑制作用