Identification of Novel Amino Acid Derived CCK-2R Antagonists As Potential Antiulcer Agent: Homology Modeling, Design, Synthesis, and Pharmacology

详细信息    查看全文

• 作者：Amit K. Gupta ; Kanika Varshney ; Neetu Singh ; Vaibhav Mishra ; Mridula Saxena ; Gautam Palit ; Anil K. Saxena
• 刊名：Journal of Chemical Information and Modeling
• 出版年：2013
• 出版时间：January 28, 2013
• 年：2013
• 卷：53
• 期：1
• 页码：176-187
• 全文大小：707K
• 年卷期：v.53,no.1(January 28, 2013)
• ISSN：1549-960X

文摘

The present study revisited the three-dimensional (3D) homology model of CCK-2R using human A_2a adenosine receptor and the resolved NMR based structure of the third extracellular loop of the CCK-2R as templates. Further in order to identify novel antiulcer agents, rational designing have been performed utilizing the substructure of a well-known CCK-2R antagonist benzotript as a lead molecule and submitted to the combined docking and simulation studies. This led to the understanding of the essential structure requirement as well as variation of binding mode among conformational isomers of small molecule CCK-2R antagonists. In the next step, preparation of each configurational isomer of these molecules was carried out and submitted for their in vitro activity followed by in vivo screening into antiulcer rat model. The biological screening of these compounds has not only validated the developed homology model of CCK-2R but also led to the identification of highly potent CCK-2R antagonist 6a as an orally active and safe candidate molecule having better antiulcer properties than the well-known drug benzotript.