Synthesis and Dopamine Receptor Modulating Activity of Substituted Bicyclic Thiazolidine Lactam Peptidomimetics of <scp>l</scp>-Prolyl-<scp>l</scp>-leucyl-glycinamide
作者:Ehab M. Khalil、Ashish Pradhan、William H. Ojala、William B. Gleason、Ram K. Mishra、Rodney L. Johnson
DOI:10.1021/jm990140n
日期:1999.7.1
the isobutyl, butyl, and benzyl groups to give peptidomimetics 3-5, respectively. These peptidomimetics were evaluated in vivo as modulators of apomorphine-induced rotational behavior in the 6-hydroxydopamine-lesioned rat model of hemiparkinsonism and were compared with the unsubstituted bicyclic thiazolidine lactam Pro-Leu-Gly-NH(2) peptidomimetic 2. Peptidomimetics 3-5 each affected rotational behavior
合成Pro-Leu-Gly-NH(2)的6位取代的双环噻唑烷内酰胺肽模拟物以测试以下假设:将疏水性侧链掺入双环噻唑烷内酰胺支架中将进一步增强此类化合物的多巴胺受体调节活性拟肽。所用的取代基是异丁基,丁基和苄基,分别得到拟肽3-5。这些拟肽在体内评价为阿扑吗啡诱导的在6-羟基多巴胺致病的半帕金森病大鼠模型中的旋转行为的调节剂,并与未取代的双环噻唑烷内酰胺Pro-Leu-Gly-NH(2)拟肽2进行了比较。拟肽3- 5个分别以钟形剂量-反应关系影响旋转行为,产生最大增加44%(1微克/ kg,ip),56%(0。分别为1微克/千克(ip)和30%(1微克/千克,ip)。相比之下,未取代的拟肽2以0.1微克/千克的剂量腹腔注射仅将旋转行为提高了23%。