PET radioligands for the vesicular acetylcholine transporter (VAChT).

Abstract:

:The vesicular acetylcholine transporter (VAChT) is a glycoprotein responsible for the accumulation of acetylcholine into pre-synaptic vesicules of cholinergic neurons. Cholinergic innervation has been shown to be decreased at the earlier stages of Alzheimer's disease (AD). Thus, the expression of VAChT has been correlated with the severity of the dementia and has been considered as a significant diagnostic target for AD. To this end numerous radioligands based on the vesamicol scaffold have been developed for imaging the VAChT using positron emission tomography (PET). Among the various radioligands only a small number have been evaluated in vivo in non-human primate and human. Despite promising in vitro, ex vivo and first in vivo studies, most of them are unsuitable for clinical use in humans due to poor selectivity over σ receptors, low extraction from the blood, slow brain kinetics or fast metabolism. To date (-)-[(11)C]OMV (1), (-)-[(11)C]MABV (2), (-)-[(18)F]-FEOBV (6), (-)-trans-2-hydroxy-3-(4-(4-[(18)F]fluorobenzoyl)piperidine)tetralin (8) and [(18)F]FBMV (12) are promising radioligands for the VAChT, though further validation is required to confirm their clinical usefulness.

journal_name

Curr Top Med Chem

authors

Giboureau N,Som IM,Boucher-Arnold A,Guilloteau D,Kassiou M

doi

10.2174/156802610793176846

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

1569-83

issue

15

eissn

1568-0266

issn

1873-4294

pii

BSP/ CTMC /E-Pub/-0100-10-16

journal_volume

10

pub_type

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