Syntheses and in vitro evaluation of decalinvesamicol analogues as potential imaging probes for vesicular acetylcholine transporter (VAChT)
作者:Takashi Kozaka、Izumi Uno、Yoji Kitamura、Daisuke Miwa、Kazuma Ogawa、Kazuhiro Shiba
DOI:10.1016/j.bmc.2012.06.040
日期:2012.8
A series of vesamicol analogues, o-iodo-trans-decalinvesamicol (OIDV) or o-bromo-trans-decalinvesamicol (OBDV), were synthesized and their affinities to vesicular acetylcholine transporter (VAChT) and σ receptors (σ-1, σ-2) were evaluated by in vitro binding assays using rat cerebral or liver membranes. OIDV and OBDV showed greater binding affinity to VAChT (Ki = 20.5 ± 5.6 and 13.8 ± 1.2 nM, respectively)
一系列vesamicol类似物,的ø -碘反式-decalinvesamicol(OIDV)或ö溴代反-decalinvesamicol(OBDV),合成和它们的亲和力的囊泡乙酰胆碱转运体(中VAChT)和σ受体(σ-1,σ- 2)使用大鼠脑或肝膜通过体外结合测定进行评估。OIDV和OBDV对VAChT的结合亲和力更高(分别为K i = 20.5±5.6和13.8±1.2 nM),而对σ受体的亲和力低的维他命醇(K i = 33.9±18.1 nM)更高。大鼠脑膜的饱和结合测定显示[ 125 I] OIDV具有一个单一的高亲和力结合位点,K d值1.73 nM和B最大值164.4 fmol / mg蛋白。[ 125 I] OIDV几乎没有与抑制剂竞争,后者对每个σ(σ-1和σ-2),5-羟色胺(5-HT 1A和5-HT 2A),去甲肾上腺素和毒蕈碱乙酰胆碱受体都具有特异性亲和力。另外,在体内证实了[