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Cocaine addiction is a chronic disorder with high relapse rates; therefore, understanding the neuronal mechanisms underlying drug-seeking during relapse is a priority to develop targeted pharmacotherapy. The metabotropic glutamate receptor 5 (mGluR5) seems to be involved in the reinstatement induced by cocaine-associated cues. The main objective of the study was to evaluate the efficacy of MPEP, a negative allosteric modulator of mGluR5, in attenuating or potentiating the reinstatement induced by priming doses of cocaine in the CPP paradigm, ultimately to further knowledge regarding the role of the mGluR5 in relapse into cocaine abuse. OF1 mice (48 female and 48 male) were conditioned in the CPP paradigm with cocaine (20 mg/kg) and were exposed to an extinction program. We evaluated the efficacy of MPEP (30 mg/kg) in blocking the successive cocaine-priming reinstatements in the CPP when extinction of the conditioning preference was confirmed. MPEP did not block the reinstatement of priming cocaine-induced CPP, but increased the potential of cocaine for reinstating conditioning preference. The contingent administration of MPEP with cocaine increased the drug-seeking behaviour and the number of reinstatements with priming doses of cocaine. Moreover, MPEP produced cross reinstatement of cocaine-induced CPP. Rather than preventing the reinstatements of conditioned preference induced by priming doses of cocaine, MPEP increased them. These findings may help to understand the role of mGluR5 in the relapse into cocaine abuse.
This article was published in the following journal.
Discovery of an orally bioavailable and Central Nervous System (CNS) penetrant mGlu7 Negative Allosteric Modulator (NAM) in vivo tool compound: N-(2-(1H-1,2,4-triazol-1-yl)-5-(trifluoromethoxy)phenyl)-4-(cyclopropylmethoxy)-3-methoxybenzamide (VU6012962).
Herein, we report the discovery of a new, orally bioavailable and CNS-penetrant metabotropic glutamate receptor 7 (mGlu7) negative allosteric modulator (NAM) that achieves exposure in cerebral spinal ...
Surgical specimens from patients with mesial temporal lobe epilepsy (MTLE) show abnormalities in tissue concentrations of metabotropic glutamate receptor type 5 (mGluR5). To clarify whether these abno...
Allosteric modulators bound to structurally diverse allosteric sites can achieve better pharmacological advantages than orthosteric ligands. The discovery of allosteric modulators, however, has been t...
The delta opioid receptor (DOPr) is an emerging target for the management of chronic pain and depression. Studies have highlighted the potential of biased signaling, the preferential activation of one...
Allosteric modulators of the metabotropic glutamate receptor subtype 5 (mGlu) have been proposed as potential therapies for various CNS disorders. These ligands bind to sites distinct from the orthost...
The study is carried out in order to determine the relationship between AZD2066 exposure and mGluR5 receptor occupancy in the brain and to demonstrate that AZD2066 can displace [11C]AZ1271...
The purpose of this study is to determine if AZD2516 binds to mGluR5 receptors in the brain. This will then help to make accurate predictions of efficacy and dosing in the future developme...
Objective: Cocaine addiction continues to be an important public health problem with over 1.7 million users in the US alone. Cocaine addiction is characterized by compulsive drug use desp...
The study test whether the NSAID allosteric site of human sulfotransferase 1A1 (SULT1A1) is operative in humans. The study will test the effects of mefenamic acid (MEF) on the sulfonation ...
Background: - A small brain protein called the metabotropic glutamate receptor subtype 5 (mGluR5) may affect several brain diseases such as autism and depression. Researchers will use 2 ...
A site on an enzyme which upon binding of a modulator, causes the enzyme to undergo a conformational change that may alter its catalytic or binding properties.
Cyclic AMP response element modulator is a basic leucine zipper transcription factor that is regulated by CYCLIC AMP. It plays an important role in SPERMATID development in the mammalian TESTIS.
The modification of the reactivity of ENZYMES by the binding of effectors to sites (ALLOSTERIC SITES) on the enzymes other than the substrate BINDING SITES.
An allosteric enzyme that regulates glycolysis and gluconeogenesis by catalyzing the transfer of a phosphate group from ATP to fructose-6-phosphate to yield fructose-2,6-bisphosphate, an allosteric effector for the other 6-phosphofructokinase, PHOSPHOFRUCTOKINASE-1. Phosphofructokinase-2 is bifunctional: the dephosphorylated form is a kinase and the phosphorylated form is a phosphatase that breaks down fructose-2,6-bisphosphate to yield fructose-6-phosphate.
A 17-kDa single-chain polypeptide growth factor that plays a significant role in the process of WOUND HEALING and is a potent inducer of PHYSIOLOGIC ANGIOGENESIS. It binds to HEPARIN, which potentiates its biological activity and protects it from proteolysis. The growth factor is an extremely potent inducer of DNA synthesis in a variety of cell types from mesoderm and neuroectoderm lineages, and also has chemotactic and mitogenic activities. It was originally named acidic fibroblast growth factor based upon its chemical properties and to distinguish it from basic fibroblast growth factor (FIBROBLAST GROWTH FACTOR 2).
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Clinical Approvals Clinical Trials Drug Approvals Drug Delivery Drug Discovery Generics Drugs Prescription Drugs In the fields of medicine, biotechnology and pharmacology, drug discovery is the process by which drugs are dis...
Pharmacy is the science and technique of preparing as well as dispensing drugs and medicines. It is a health profession that links health sciences with chemical sciences and aims to ensure the safe and effective use of pharmaceutical drugs. The scope of...