Synthesis and in vivo evaluation of [O-methyl-11C] N-[3,5-dichloro-2-(methoxy)phenyl]-4-(methoxy)-3-(1-piperazinyl)benzenesulfonamide as an imaging probe for 5-HT6 receptors
作者:Fei Liu、Vattoly J. Majo、Jaya Prabhakaran、Matthew S. Milak、J. John Mann、Ramin V. Parsey、J.S. Dileep Kumar
DOI:10.1016/j.bmc.2011.06.090
日期:2011.9
The serotonin receptor 6 (5-HT6) is implicated in the pathophysiology of cognitive diseases, schizophrenia, anxiety and obesity and in vivo studies of this receptor would be of value for studying the pathophysiology of these disorders. Therefore, N-[3,5-dichloro-2-(methoxy)phenyl]-4-(methoxy)-3-(1-piperazinyl)benzenesulfonamide (SB399885), a selective and high affinity (pKi = 9.11) 5-HT6 antagonist,
血清素受体6(5-HT 6)与认知疾病,精神分裂症,焦虑症和肥胖症的病理生理有关,对该受体的体内研究对于研究这些疾病的病理生理学将是有价值的。因此,N- [3,5-二氯-2-(甲氧基)苯基] -4-(甲氧基)-3-(1-哌嗪基)苯磺酰胺(SB399885)具有选择性和高亲和力(p K i = 9.11)5 -HT 6拮抗剂已通过用[ 11 C] MeOTf进行相应的脱甲基类似物的O-甲基化,用碳11进行了放射性标记,以便确定[ 11 C] SB399885对量化5-HT 6的适用性使用PET在活脑中的R。从1-(2-甲氧基苯基)哌嗪盐酸盐开始,以优异的产率制备了脱甲基-SB399885。[ 11 C] SB399885的放射性标记产率为30±5%(EOS),在EOB处的总合成时间为30分钟。在狒狒中用[ 11 C] SB399885进行的PET研究表明,摄取迅速,随后在大脑中迅速清除。在