当前位置： SCI文献检索 > NEUROPHARMACOLOGY期刊下所有文献 > Cognitive enhancement and antipsychotic-like activity following repeated dosing with the selective M4 PAM VU0467154.

Cognitive enhancement and antipsychotic-like activity following repeated dosing with the selective M4 PAM VU0467154.

Abstract：

:Although selective activation of the M1 muscarinic acetylcholine receptor (mAChR) subtype has been shown to improve cognitive function in animal models of neuropsychiatric disorders, recent evidence suggests that enhancing M4 mAChR function can also improve memory performance. Positive allosteric modulators (PAMs) targeting the M4 mAChR subtype have shown therapeutic potential for the treatment of multiple symptoms observed in schizophrenia, including positive and cognitive symptoms when assessed in acute preclinical dosing paradigms. Since the cholinergic system has been implicated in multiple stages of learning and memory, we evaluated the effects of repeated dosing with the highly selective M4 PAM VU0467154 on either acquisition and/or consolidation of learning and memory when dosed alone or after pharmacologic challenge with the N-methyl-d-aspartate subtype of glutamate receptors (NMDAR) antagonist MK-801. MK-801 challenge represents a well-documented preclinical model of NMDAR hypofunction that is thought to underlie some of the positive and cognitive symptoms observed in schizophrenia. In wildtype mice, 10-day, once-daily dosing of VU0467154 either prior to, or immediately after daily testing enhanced the rate of learning in a touchscreen visual pairwise discrimination task; these effects were absent in M4 mAChR knockout mice. Following a similar 10-day, once-daily dosing regimen of VU0467154, we also observed 1) improved acquisition of memory in a cue-mediated conditioned freezing paradigm, 2) attenuation of MK-801-induced disruptions in the acquisition of memory in a context-mediated conditioned freezing paradigm and 3) reversal of MK-801-induced hyperlocomotion. Comparable efficacy and plasma and brain concentrations of VU0467154 were observed after repeated dosing as those previously reported with an acute, single dose administration of this M4 PAM. Together, these studies are the first to demonstrate that cognitive enhancing and antipsychotic-like activity are not subject to the development of tolerance following repeated dosing with a selective M4 PAM in mice and further suggest that activation of M4 mAChRs may modulate both acquisition and consolidation of memory functions.

journal_name

Neuropharmacology

journal_title

Neuropharmacology

authors

Gould RW,Grannan MD,Gunter BW,Ball J,Bubser M,Bridges TM,Wess J,Wood MW,Brandon NJ,Duggan ME,Niswender CM,Lindsley CW,Conn PJ,Jones CK

doi

10.1016/j.neuropharm.2017.07.013

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

492-502

eissn

0028-3908

issn

1873-7064

pii

S0028-3908(17)30343-X

journal_volume

128

pub_type

杂志文章

在线工具

Cognitive enhancement and antipsychotic-like activity following repeated dosing with the selective M4 PAM VU0467154.