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https://www.readbyqxmd.com/read/28539393/phencyclidine-pcp-administration-during-neurodevelopment-alters-network-activity-in-prefrontal-cortex-and-hippocampus-in-adult-rats
#1
Celia Kjaerby, Nanna Hovelsø, Nils Ole Dalby, Florence Sotty
Symptoms of schizophrenia have been linked to insults during neurodevelopment such as NMDA receptor antagonist exposure. In animal models, this leads to schizophrenia-like behavioral symptoms as well as molecular and functional changes within hippocampal and prefrontal regions. The aim of this study was to determine how administration with the NMDA receptor antagonist, phencyclidine (PCP), during neurodevelopment affects functional network changes within the hippocampus and medial prefrontal cortex (mPFC). We recorded field potentials in vivo following electrical brainstem stimulation and observed a suppression of evoked theta power in ventral hippocampus, while evoked gamma power in mPFC was enhanced in rats administered neonatally with PCP...
May 24, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28528115/alcohol-and-other-substance-use-after-bariatric-surgery-prospective-evidence-from-a-u-s-multicenter-cohort-study
#2
Wendy C King, Jia-Yuh Chen, Anita P Courcoulas, Gregory F Dakin, Scott G Engel, David R Flum, Marcelo W Hinojosa, Melissa A Kalarchian, Samer G Mattar, James E Mitchell, Alfons Pomp, Walter J Pories, Kristine J Steffen, Gretchen E White, Bruce M Wolfe, Susan Z Yanovski
BACKGROUND: Empirical evidence suggests Roux-en-Y gastric bypass (RYGB) increases risk of developing alcohol use disorder (AUD). However, prospective assessment of substance use disorders (SUD) after bariatric surgery is limited. OBJECTIVE: To report SUD-related outcomes after RYGB and laparoscopic adjustable gastric banding (LAGB). To identify factors associated with incident SUD-related outcomes. SETTING: 10 U.S. hospitals METHODS: The Longitudinal Assessment of Bariatric Surgery-2 is a prospective cohort study...
March 31, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28513099/syntheses-analytical-and-pharmacological-characterizations-of-the-legal-high-4-1-3-methoxyphenyl-cyclohexyl-morpholine-3-meo-pcmo-and-analogues
#3
Tristan Colestock, Jason Wallach, Matt Mansi, Nadine Filemban, Hamilton Morris, Simon P Elliott, Folker Westphal, Simon D Brandt, Adeboye Adejare
New psychoactive substances (NPS) are commonly referred to as "research chemicals", "designer drugs" or "legal highs." One NPS class is represented by dissociative anesthetics, which include analogues of the arylcyclohexylamine phencyclidine (PCP), ketamine, and diphenidine. A recent addition to the NPS market was 4-[1-(3-methoxyphenyl)cyclohexyl]morpholine (3-MeO-PCMo), a morpholine analogue of 3-MeO-PCP. Although suspected to have dissociative effects in users, information about its pharmacological profile is not available...
May 16, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28455126/neurochemical-arguments-for-the-use-of-dopamine-d4-receptor-stimulation-to-improve-cognitive-impairment-associated-with-schizophrenia
#4
Mei Huang, Sunoh Kwon, Wenqi He, Herbert Y Meltzer
BACKGROUND: Dopamine (DA) D4 receptors have been implicated in schizophrenia and the ability of some atypical antipsychotic drugs (APDs) to improve the cognitive impairment associated with schizophrenia (CIAS). Systemic administration of a D4 agonist, PD168077, at a sub-effective dose, together with a sub-effective dose of lurasidone, an atypical APD which is a weak D4 receptor antagonist, reversed the deficit in novel object recognition (NOR) in rats treated subchronically with phencyclidine (PCP), a rodent model of CIAS...
April 25, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28441905/dopamine-dysregulation-in-the-prefrontal-cortex-relates-to-cognitive-deficits-in-the-sub-chronic-pcp-model-for-schizophrenia-a-preliminary-investigation
#5
Samantha L McLean, Michael K Harte, Joanna C Neill, Andrew Mj Young
RATIONALE: Dopamine dysregulation in the prefrontal cortex (PFC) plays an important role in cognitive dysfunction in schizophrenia. Sub-chronic phencyclidine (scPCP) treatment produces cognitive impairments in rodents and is a thoroughly validated animal model for cognitive deficits in schizophrenia. The aim of our study was to investigate the role of PFC dopamine in scPCP-induced deficits in a cognitive task of relevance to the disorder, novel object recognition (NOR). METHODS: Twelve adult female Lister Hooded rats received scPCP (2 mg/kg) or vehicle via the intraperitoneal route twice daily for 7 days, followed by 7 days washout...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28412329/comparison-of-pro-amnesic-efficacy-of-scopolamine-biperiden-and-phencyclidine-by-using-passive-avoidance-task-in-cd-1-mice
#6
Natalia Malikowska, Kinga Sałat, Adrian Podkowa
INTRODUCTION: Memory disorders accompany numerous diseases and therapies, and this is becoming a growing medical issue worldwide. Currently, various animal models of memory impairments are available; however, many of them require high financial outlay and/or are time-consuming. A simple way to achieve an efficient behavioral model of cognitive disorders is to inject defined drug that has pro-amnesic properties. Since the involvement of cholinergic and glutamatergic neurotransmission in cognition is well established, the utilization of a nonselective muscarinic receptor antagonist, scopolamine (SCOP), a selective M1 muscarinic receptor antagonist, biperiden (BIP), and a non-competitive N-methyl-d-aspartate (NMDA) receptor antagonist, phencyclidine (PCP) seems to be reliable tools to induce amnesia...
April 13, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28396142/atypical-binding-at-dopamine-and-serotonin-transporters-contribute-to-the-discriminative-stimulus-effects-of-mephedrone
#7
Alyssa F DeLarge, Laura L Erwin, Peter J Winsauer
Mephedrone (4-methylmethcathinone), a constituent of the recreational substances known as "bath salts", is a synthetic cathinone that can produce auditory and visual hallucinations, as well as problematic cardiovascular effects. This study compared the discriminative stimulus effects of mephedrone (0.32-10 mg/kg) with other prototypical drugs of abuse: cocaine (0.56-32 mg/kg), d-amphetamine (0.18-3.2 mg/kg), ketamine (1.8-18 mg/kg), phencyclidine (PCP, 1-5.6 mg/kg), heroin (1-10 mg/kg), 2,5-dimethoxy-4-iodoamphetamine (R-DOI, 0...
April 7, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28389140/sex-differences-in-aripiprazole-sensitization-from-adolescence-to-adulthood
#8
Elizabeth Freeman, Joanne Lin, Shinnyi Chow, Collin Davis, Ming Li
The present study investigated the potential sex differences in repeated aripiprazole (ARI) treatment-induced behavioral sensitization from adolescence to adulthood, and to determine whether ARI sensitization can be transferred to olanzapine (OLZ) and/or clozapine (CLZ) using the conditioned avoidance response (CAR) and phencyclidine-induced (PCP) hyperlocomotion tests of antipsychotic activity. Male and female Sprague-Dawley adolescence rats (P46) were first treated with ARI (10mg/kg) for 5 consecutive days (P46-50) and tested for avoidance response and ARI-induced inhibition of PCP-induced hyperlocomotion...
April 4, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28373127/rp5063-an-atypical-antipsychotic-drug-with-a-unique-pharmacologic-profile-improves-declarative-memory-and-psychosis-in-mouse-models-of-schizophrenia
#9
Lakshmi Rajagopal, Sunoh Kwon, Mei Huang, Eric Michael, Laxminarayan Bhat, Marc Cantillon, Herbert Y Meltzer
Various types of atypical antipsychotic drugs (AAPDs) modestly improve the cognitive impairment associated with schizophrenia (CIAS). RP5063 is an AAPD with a diverse and unique pharmacology, including partial agonism at dopamine (DA) D2, D3, D4, serotonin (5-HT)1A, and 5-HT2A receptors (Rs), full agonism at α4β2 nicotinic acetylcholine (ACh)R (nAChR), and antagonism at 5-HT2B, 5-HT6, and 5-HT7Rs. Most atypical APDs are 5-HT2A inverse agonists. The efficacy of RP5063 in mouse models of psychosis and episodic memory were studied...
March 31, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28353244/generation-of-the-acute-phencyclidine-rat-model-for-proteomic-studies-of-schizophrenia
#10
Dan Ma, Paul C Guest
Administration of the non-competitive N-methyl-D-aspartate (NMDA) receptor antagonist phencyclidine (PCP) to rodents has been used as the gold standard preclinical model for schizophrenia. PCP treatment induces hyperlocomotion and stereotypic behaviour, which resemble the positive symptoms of schizophrenia. In addition, proteomic studies have identified changes in proteins associated with energy metabolism and neurotransmission which are typical hallmarks of the disease. This chapter presents a protocol for the generation of this model, behavioural assessment and preparation of key bio-samples to provide the raw materials for proteomic analyses...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28347261/dopamine-d4-receptor-stimulation-contributes-to-novel-object-recognition-relevance-to-cognitive-impairment-in-schizophrenia
#11
Masanori Miyauchi, Nichole M Neugebauer, Herbert Y Meltzer
Several atypical antipsychotic drugs (APDs) have high affinity for the dopamine (DA) D4 receptor, but the relevance to the efficacy for the treatment of cognitive impairment associated with schizophrenia (CIAS) is poorly understood. The aim of this study was to investigate the effects of D4 receptor stimulation or blockade on novel object recognition (NOR) in normal rats and on the sub-chronic phencyclidine (PCP)-induced novel object recognition deficit. The effect of the D4 agonist, PD168077, and the D4 antagonist, L-745,870, were studied alone, and in combination with clozapine and lurasidone...
April 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28342897/dose-response-effect-of-acute-phencyclidine-on-functional-connectivity-and-dopamine-levels-and-their-association-with-schizophrenia-like-symptom-classes-in-rat
#12
Jaakko Paasonen, Raimo A Salo, Jouni Ihalainen, Juuso V Leikas, Katja Savolainen, Marko Lehtonen, Markus M Forsberg, Olli Gröhn
Current drug treatments for schizophrenia (SCZ) can alleviate positive symptoms, but have little effect on the negative symptoms and cognitive deficits that are difficult to translate into preclinical models for drug development. Therefore, we aimed to determine the dose-response effects of acute phencyclidine (PCP, 1.0-5.0 mg/kg) on rat brain connectivity and detect markers for different SCZ-like symptoms. Pharmacological functional magnetic resonance imaging (phMRI) and microdialysis were used to investigate PCP-induced effects on functional connectivity (FC) and dopamine levels, respectively...
March 22, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28340702/selective-solid-phase-extraction-of-jwh-synthetic-cannabinoids-by-using-computationally-designed-peptides
#13
Marcello Mascini, Camilla Montesano, German Perez, Joseph Wang, Dario Compagnone, Manuel Sergi
The objective of the present work is to demonstrate a rational way to prepare selective sorbents able to extract simultaneously several structural analogs. For this purpose the binding specificity of two hexapeptides computationally designed (VYWLVW and YYIGGF) versus four synthetic cannabinoids Naphthalen-1-yl-(1-pentylindol-3-yl)methanone (JWH 018), naphthalen-1-yl-(1-butylindol-3-yl)methanone (JWH 073), (R)-(1-((1-methylpiperidin-2-yl)methyl)-1H-indol-3-yl)(naphthalen-1-yl)methanone (AM 1220) and (R)-(+)-[2,3-Dihydro-5-methyl-3-(4-morpholinylmethyl)pyrrolo[1,2,3-de]-1,4-benzoxazin-6-yl]-1-napthalenylmethanone (WIN 55) was computationally studied and then experimentally tested by solid-phase extraction (SPE) clean-up and ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) analysis...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28324770/a-non-fatal-intoxication-and-seven-deaths-involving-the-dissociative-drug-3-meo-pcp
#14
Anna Johansson, Daniel Lindstedt, Markus Roman, Gunilla Thelander, Elisabet I Nielsen, Ulrica Lennborn, Håkan Sandler, Sten Rubertsson, Johan Ahlner, Robert Kronstrand, Fredrik C Kugelberg
INTRODUCTION: 3-methoxyphencyclidine (3-MeO-PCP) appeared on the illicit drug market in 2011 and is an analogue of phencyclidine, which exhibits anesthetic, analgesic and hallucinogenic properties. In this paper, we report data from a non-fatal intoxication and seven deaths involving 3-MeO-PCP in Sweden during the period March 2014 until June 2016. CASE DESCRIPTIONS: The non-fatal intoxication case, a 19-year-old male with drug problems and a medical history of depression, was found awake but tachycardic, hypertensive, tachypnoeic and catatonic at home...
March 7, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28318841/acquisition-of-nicotine-self-administration-in-amphetamine-and-phencyclidine-models-of-schizophrenia-a-role-for-stress
#15
Paul J Fletcher, Zhaoxia Li, Kathleen M Coen, Anh D Lê
Nicotine use and dependence is very high in patients with schizophrenia. One possible reason is that altered dopamine or glutamate activity in schizophrenia enhances the reinforcing effectiveness of nicotine. We used animal models to test the hypothesis that a hyperdopaminergic state (induced by repeated intermittent injections of amphetamine) or altered glutamate function (subchronic injection of phencyclidine, PCP) facilitates spontaneous acquisition of nicotine self-administration in rats. In Experiment 1 animals in an amphetamine-induced sensitized state (AISS) did not differ from saline-injected controls in their acquisition and maintenance of nicotine self-administration...
March 16, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28315270/sigma-1-receptor-agonists-and-their-clinical-implications-in-neuropsychiatric-disorders
#16
Yakup Albayrak, Kenji Hashimoto
Accumulating evidence suggests that sigma-1 receptors play a role in the pathophysiology of neuropsychiatric diseases, as well as in the mechanisms of some selective serotonin reuptake inhibitors (SSRIs). Among the SSRIs, the order of affinity for sigma-1 receptors is as follows: fluvoxamine > sertraline > fluoxetine > escitalopram > citalopram > paroxetine. Some SSRIs (e.g., fluvoxamine, fluoxetine and escitalopram) and other drugs (donepezil , ifenprodil , dehydroepiandeterone (DHEA)) potentiate nerve-growth factor (NGF)-induced neurite outgrowth in PC12 cells, and these effects could be antagonized by the selective sigma-1 receptor antagonist NE-100...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28293729/altered-cortico-striatal-crosstalk-underlies-object-recognition-memory-deficits-in-the-sub-chronic-phencyclidine-model-of-schizophrenia
#17
Aman Asif-Malik, Daniel Dautan, Andrew M J Young, Todor V Gerdjikov
The neural mechanisms underlying cognitive deficits in schizophrenia are poorly understood. Sub-chronic treatment with the NMDA antagonist phencyclidine (PCP) produces cognitive abnormalities in rodents that reliably model aspects of the neurocognitive alterations observed in schizophrenia. Given that network activity across regions encompassing medial prefrontal cortex (mPFC) and nucleus accumbens (NAc) plays a significant role in motivational and cognitive tasks, we measured activity across cortico-striatal pathways in PCP-treated rats to characterize neural enabling and encoding of task performance in a novel object recognition task...
March 14, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28285123/preclinical-predictors-that-the-orthosteric-mglu2-3-receptor-antagonist-ly3020371-will-not-engender-ketamine-associated-neurotoxic-motor-cognitive-subjective-or-abuse-liability-related-effects
#18
J M Witkin, J A Monn, J Li, B Johnson, D L McKinzie, X-S Wang, B A Heinz, R Li, P L Ornstein, S C Smith, C H Mitch, D O Calligaro, S Swanson, D Allen, K Phillips, G Gilmour
The novel mGlu2/3 receptor antagonist, LY3020371, has been shown to produce antidepressant-like effects comparable to that of the clinically-effective antidepressant ketamine. In the present study, we investigated whether LY3020371 would be predicted to be free of the side-effects and safety pharmacology issues associated with ketamine. In contrast to ketamine, LY3020371 produced small increases in locomotion and did not impair motor performance on an inverted screen. Ketamine, but not LY3020371, increased dopamine efflux in the nucleus accumbens of rats...
March 8, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28244984/schizophrenia-like-phenotypes-in-mice-with-nmda-receptor-ablation-in-intralaminar-thalamic-nucleus-cells-and-gene-therapy-based-reversal-in-adults
#19
K Yasuda, Y Hayashi, T Yoshida, M Kashiwagi, N Nakagawa, T Michikawa, M Tanaka, R Ando, A Huang, T Hosoya, T J McHugh, M Kuwahara, S Itohara
In understanding the mechanism of schizophrenia pathogenesis, a significant finding is that drug abuse of phencyclidine or its analog ketamine causes symptoms similar to schizophrenia. Such drug effects are triggered even by administration at post-adolescent stages. Both drugs are N-methyl-d-aspartate receptor (NMDAR) antagonists, leading to a major hypothesis that glutamate hypofunction underlies schizophrenia pathogenesis. The precise region that depends on NMDAR function, however, is unclear. Here, we developed a mouse strain in which NMDARs in the intralaminar thalamic nuclei (ILN) were selectively disrupted...
February 28, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28238186/effects-of-hallucinogens-on-neuronal-activity
#20
L Lladó-Pelfort, P Celada, M S Riga, E Troyano-Rodríguez, N Santana, F Artigas
Hallucinogens evoke sensory, perceptual, affective, and cognitive effects that may be useful to understand the neurobiological basis of mood and psychotic disorders. The present chapter reviews preclinical research carried out in recent years in order to better understand the action of psychotomimetic agents such as the noncompetitive NMDA receptor (NMDA-R) antagonists and serotonergic hallucinogens. Our studies have focused on the mechanisms through which these agents alter cortical activity. Noncompetitive NMDA-R antagonists, such as phencyclidine (PCP) and MK-801 (dizocilpine), as well as the serotonergic hallucinogens DOI and 5-MeO-DMT, produce similar effects on cellular and population activity in prefrontal cortex (PFC); these effects include alterations of pyramidal neuron discharge (with an overall increase in firing), as well as a marked attenuation of the low frequency oscillations (0...
February 26, 2017: Current Topics in Behavioral Neurosciences
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