我们在这里描述了针对G蛋白偶联受体TGR5的天然存在的三萜类化合物的生物筛选,已知该三肽类化合物被胆汁酸激活并介导了一些重要的细胞功能。这项工作揭示了白蛋白(1),齐墩果酸(2)和熊果酸(3)与胆汁酸相比,以选择性的方式表现出TGR5激动剂活性,胆汁酸也激活了核胆汁酸受体FXR。选择最有效的天然三萜类桦木酸作为SAR研究的参考化合物。在桦木酸支架上进行半合成,我们专注于C-3醇,C-17羧酸和C-20烯烃的结构修饰。特别地,在C-3位置附近的结构变化引起效力的重大改善,例如衍生物18 dia 2(RG-239)和19 dia 2。在体外和体内测试了最佳衍生物,并讨论了其生物学特性。
naturally rich betulinic acid (compound2) as starting material for lead optimization and a focusedlibrary of its derivatives was constructed to gain a better understanding of the structure activity relationship (SAR) of triterpenoid‐typeinhibitor of PS1/BACE1 interaction. Compound 22 was finally chosen as the most potent PS1/BACE1 interaction inhibitor, which reduced Aβ generation effectively.
Method of preparing and use of prodrugs of betulinic acid derivatives
申请人:Pezzuto M. John
公开号:US20070072835A1
公开(公告)日:2007-03-29
A composition and method of preventing or inhibiting tumor growth and, more particularly, of treating a malignant tumor, using prodrugs of plant-derived compounds and derivatives is disclosed. In the method, a composition containing betulinic acid or a betulinic acid derivative is administered in a prodrug form to release betulinic acid or a betulinic acid derivative in vivo at the tumor site.
Structure−Activity Relationship Study of Betulinic Acid, A Novel and Selective TGR5 Agonist, and Its Synthetic Derivatives: Potential Impact in Diabetes
protein-coupled receptor TGR5, known to be activated by bile acids and which mediates some important cell functions. This work revealed that betulinic (1), oleanolic (2), and ursolic acid (3) exhibited TGR5agonist activity in a selective manner compared to bile acids, which also activated FXR, the nuclear bile acid receptor. The most potent natural triterpenoid betulinicacid was chosen as a reference
我们在这里描述了针对G蛋白偶联受体TGR5的天然存在的三萜类化合物的生物筛选,已知该三肽类化合物被胆汁酸激活并介导了一些重要的细胞功能。这项工作揭示了白蛋白(1),齐墩果酸(2)和熊果酸(3)与胆汁酸相比,以选择性的方式表现出TGR5激动剂活性,胆汁酸也激活了核胆汁酸受体FXR。选择最有效的天然三萜类桦木酸作为SAR研究的参考化合物。在桦木酸支架上进行半合成,我们专注于C-3醇,C-17羧酸和C-20烯烃的结构修饰。特别地,在C-3位置附近的结构变化引起效力的重大改善,例如衍生物18 dia 2(RG-239)和19 dia 2。在体外和体内测试了最佳衍生物,并讨论了其生物学特性。