Imaging of cholinergic terminals using the radiotracer [18F](+)‐4‐fluorobenzyltrozamicol: In vitro binding studies and positron emission tomography studies in nonhuman primates
Imaging of cholinergic terminals using the radiotracer [18F](+)‐4‐fluorobenzyltrozamicol: In vitro binding studies and positron emission tomography studies in nonhuman primates
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使用放射性示踪剂 [18F](+)-4-氟苄基三唑醇对胆碱能末端进行成像:非人灵长类动物的体外结合研究和正电子发射断层扫描研究
作者:
R. Mach;M. Voytko;R. Ehrenkaufer;M. Nader;J. R. Tobin;S. Efange;S. Parsons;H. Gage;Cynthia R. Smith;T. Morton
The goal of the present set of studies was to characterize the in vitro binding properties and in vivo tissue kinetics for the vesicular acetylcholine transporter (VAcChT) radiotracer, [18F](+)‐4‐fluorobenzyltrozamicol ([18F](+)‐FBT). In vitro binding studies were conducted in order to determine the affinity of the (+)‐ and (−)‐ stereoisomers of FBT for the VAcChT as well as sigma (σ2 and σ2) receptors. (+)‐FBT was found to have a high affinity (Ki = 0.22 nM) for the VAcChT and lower affinities for σ1 (21.6 nM) and σ2 (35.9 nM) receptors, whereas (−)‐FBT had similar affinities for the VAcChT and σ1 receptors (∼20 nM) and a lower affinity for σ2 (110 nM) receptors. PET imaging studies were conducted in rhesus monkeys (n = 3) with [18F](+)‐FBT. [18F](+)‐FBT was found to have a high accumulation and slow rate of washout from the basal ganglia, which is consistent with the labeling of cholinergic interneurons in this brain region. [18F](+)‐FBT also displayed reversible binding kinetics during the 3 h time course of PET and produced radiolabeled metabolites that did not cross the blood‐brain barrier. The results from the current in vitro and in vivo studies indicate that [18F](+)‐FBT is a promising ligand for studying cholinergic terminal density, with PET, via the VAcChT. Synapse 25:368–380, 1997. © 1997 Wiley‐Liss, Inc.
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影响因子:
3.6
作者:
Rogers,GA;Kornreich,WD;Hand,K;Parsons,SM
通讯作者:
Parsons,SM
DOI:
10.1016/0163-1047(90)90639-n
发表时间:
1990
期刊:
Behavioral and neural biology
影响因子:
--
作者:
Levin,ED;McGurk,SR;Rose,JE;Butcher,LL
通讯作者:
Butcher,LL
影响因子:
56.9
作者:
MASH, DC;FLYNN, DD;POTTER, LT
通讯作者:
POTTER, LT
DOI:
--
发表时间:
1995-12
期刊:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子:
--
作者:
Y. Ding;J. Fowler;N. Volkow;J. Logan;S. Gatley;Y. Sugano
通讯作者:
Y. Ding;J. Fowler;N. Volkow;J. Logan;S. Gatley;Y. Sugano
影响因子:
7.3
作者:
Rogers,GA;Parsons,SM;Anderson,DC;Nilsson,LM;Bahr,BA;Kornreich,WD;Kaufman,R;Jacobs,RS;Kirtman,B
通讯作者:
Kirtman,B