Identification of a novel GPR81-selective agonist that suppresses lipolysis in mice without cutaneous flushing
作者:Taku Sakurai、Richard Davenport、Stuart Stafford、Johannes Grosse、Kazumasa Ogawa、Jennifer Cameron、Laura Parton、Andy Sykes、Stephen Mack、Sarah Bousba、Alka Parmar、David Harrison、Louise Dickson、Mathew Leveridge、Junji Matsui、Matt Barnes
DOI:10.1016/j.ejphar.2014.01.029
日期:2014.3
GPR81, which exhibits a high degree of homology with GPR109a, has been recently identified as a lactate receptor. Similar to GPR109a, the activation of GPR81 by lactate suppresses lipolysis, suggesting that GPR81 may be a potential drug target for treating dyslipidemia. In addition, the fact that GPR81 is expressed only in adipocytes, whereas GPR109a is expressed in various tissues and cells, including
与GPR109a具有高度同源性的GPR81最近被鉴定为乳酸受体。与GPR109a相似,乳酸对GPR81的激活抑制了脂解作用,表明GPR81可能是治疗血脂异常的潜在药物靶标。此外,GPR81仅在脂肪细胞中表达,而GPR109a在各种组织和细胞(包括被认为引起潮红的朗格汉斯细胞)中表达的事实表明,靶向GPR81可能导致抗血脂异常药物的产生,风险降低这种副作用。然而,GPR81的药理作用仍不清楚,主要是因为缺乏适用于体内研究的强效和选择性替代GPR81激动剂。在目前的研究中,我们表明,乳酸诱导的白色脂肪组织(WAT)外植体中脂解的抑制取决于GPR81的存在。我们还进行了高通量筛选(HTS),并确定了四个新型化学簇作为GPR81激动剂。氨基噻唑衍生物的化学优化导致发现了具有增强效价的先导化合物。该化合物抑制分化的3T3-L1脂肪细胞中的脂肪分解。最后,腹膜内给予该化合物可抑制小鼠的脂解,且剂量不会引起皮肤潮红。这是对50nM