Analogues of Neurohypophyseal Hormones, Oxytocin and Arginine Vasopressin, Conformationally Restricted in the N-Terminal Part of the Molecule
作者:Wioleta Kowalczyk、Adam Prahl、Izabela Derdowska、Dariusz Sobolewski、Jadwiga Olejnik、Janusz Zabrocki、Lenka Borovicková、Jiřina Slaninová、Bernard Lammek
DOI:10.1021/jm058038f
日期:2006.3.1
generally accepted that the conformation of the N-terminal part of neurohypophyseal hormones analogues is important for their pharmacological activity. In this work, we decided to investigate how the substitution of positions 2 and 3 with the ethylene-bridged dipeptide would alter the pharmacological properties of OT, [Mpa1]OT, and [Cpa1]OT (OT=oxytocin; Mpa=3-mercaptopropionic acid; Cpa=1-mercaptocyclohexaneacetic
通常认为,神经下垂体激素类似物的N-末端部分的构象对于它们的药理活性是重要的。在这项工作中,我们决定研究用乙烯桥连的二肽取代位置2和3将如何改变OT,[Mpa1] OT和[Cpa1] OT的药理特性(OT =催产素; Mpa = 3-巯基丙酸酸; Cpa = 1-巯基环己烷乙酸),并研究在AVP,[Mpa1] AVP和[Cpa1] AVP(AVP =精氨酸加压素)的2位掺入的3,3-二苯基-L-丙氨酸残基如何变化化合物的药理特性。接下来的类似物[Val4] AVP,[Mpa1,Val4] AVP和[Cpa1,Val4] AVP在位置3引入了N-苄基-L-丙氨酸。最后一个肽是通过AVP中的Cys1取代在空间上设计的受限制的笨重的对手,α-羟甲基半胱氨酸。测试了所有肽在大鼠中的体外子宫收缩,加压和抗利尿活性。这些测定的结果表明,分子N末端部分的构象自由度的降低对药理活性具有重大影响。