Étiquette : CB1 recepteur

Does regular cannabis use affect neuroanatomy ? An updated systematic review and meta-analysis of structural neuroimaging studies, Valentina Lorenzetti et al., 2019

Does regular cannabis use affect neuroanatomy ? An updated systematic review and meta-analysis of structural neuroimaging studies Valentina Lorenzetti, Yann Chye, Pedro Silva, Nadia Solowij, Carl A. Roberts European Archives of Psychiatry and Clinical Neuroscience, 2019 Doi : 10.1007/s00406-019-00979-1 Abstract Regular cannabis use is associated with adverse cognitive and mental health outcomes that have been ascribed to aberrant neuroanatomy in brain regions densely innervated with cannabinoid receptors. Neuroanatomical differences between cannabis users and controls have been assessed in multiple structural magnetic resonance imaging (sMRI) studies. However, there is heterogeneity in the results leading to cautious interpretation of the data so far. We examined the sMRI [...]

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The Role of Endocannabinoid Signaling in Cortical Inhibitory Neuron Dysfunction in Schizophrenia, David W. Volk and David A. Lewis, 2016

The Role of Endocannabinoid Signaling in Cortical Inhibitory Neuron Dysfunction in Schizophrenia David W. Volk and David A. Lewis Biological Psychiatry, 2016, 79, 595-603. http://dx.doi.org/10.1016/j.biopsych.2015.06.015   ABSTRACT Cannabis use has been reported to increase the risk of developing schizophrenia and to worsen symptoms of the illness. Both of these outcomes might be attributable to the disruption by cannabis of the endogenous cannabinoid system’s spatiotemporal regulation of the inhibitory circuitry in the prefrontal cortex that is essential for core cognitive processes, such as working memory, which are impaired in schizophrenia. In the healthy brain, the endocannabinoid 2-arachidonylglycerol 1) is synthesized by diacylglycerol lipase in pyramidal neurons; 2) [...]

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Effects of endocannabinoid neurotransmission modulators on brain stimulation reward, Styliani Vlachou et al., 2006

Effects of endocannabinoid neurotransmission modulators on brain stimulation reward Styliani Vlachou, George G. Nomikos & George Panagis Psychopharmacology, 2006, 188, 293–305 Doi : 10.1007/s00213-006-0506-0   Abstract Rationale : The endogenous cannabinoid system is responsive to the neurobiological actions of Δ9-tetrahydrocannabinol (THC) and other cannabinoid ligands. While numerous studies have focused on the behavioral and pharmacological effects of THC and cannabinoid agonists in experimental animals, most recent work focuses on compounds that modulate endocannabinoid neurotransmission. However, the relevant studies concerning the ability of endocannabinoid modulators to modify reward processes in experimental animals remain rather scarce. Objectives : The present study examined the effects of drugs modulating endocannabinoid neurotransmission on [...]

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In Vivo Availability of Cannabinoid 1 Receptor Levels in Patients With First-Episode Psychosis, Faith Borgan et al., 2019

In Vivo Availability of Cannabinoid 1 Receptor Levels in Patients With First-Episode Psychosis Faith Borgan, Heikki Laurikainen, Mattia Veronese, Tiago Reis Marques, Merja Haaparanta-Solin, Olof Solin, Tarik Dahoun, Maria Rogdaki, Raimo KR Salokangas, Max Karukivi, Marta Di Forti, Federico Turkheimer, Jarmo Hietala, Oliver Howes for the METSY Group JAMA Psychiatry, 2019. doi : 10.1001/jamapsychiatry.2019.1427   IMPORTANCE Experimental and epidemiological studies implicate the cannabinoid 1 receptor (CB1R) in the pathophysiology of psychosis. However, whether CB1R levels are altered in the early stages of psychosis and whether they are linked to cognitive function or symptom severity remain unknown. OBJECTIVE To investigate CB1R availability in first-episode psychosis (FEP) without the [...]

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Endocannabinoid system in sexual motivational processes : Is it a novel therapeutic horizon ?, Renata Androvicova et al., 2017

Endocannabinoid system in sexual motivational processes : Is it a novel therapeutic horizon ? Renata Androvicova, Jiri Horacek, Tibor Stark, Filippo Drago, Vincenzo Micale Pharmacological Research, 2017, 115, 200–208 http://dx.doi.org/10.1016/j.phrs.2016.11.021   a b s t r a c t The endocannabinoid system (ECS), which is composed of the cannabinoid receptors types 1 and 2 (CB1 and CB2) for marijuana’s psychoactive ingredient 9-tetrahydrocannabinol (9-THC), the endogenous ligands (AEA and 2-AG) and the enzymatic systems involved in their biosynthesis and degradation, recently emerged as important modulator of emotional and non-emotional behaviors. For centuries, in addition to its recreational actions, several contradictory claims regarding the effects of Cannabis use in sexual functioning and behavior [...]

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Hippocampal Neurotoxicity of D9-Tetrahydrocannabinol, Guy Chiu-Kai Chan et al., 1998

Hippocampal Neurotoxicity of D9-Tetrahydrocannabinol Guy Chiu-Kai Chan, Thomas R. Hinds, Soren Impey, and Daniel R. Storm The Journal of Neuroscience, 1998, 18, (14), 5322–5332 Marijuana consumption elicits diverse physiological and psychological effects in humans, including memory loss. Here we report that D9-tetrahydrocannabinol (THC), the major psychoactive component of marijuana, is toxic for hippocampal neurons. Treatment of cultured neurons or hippocampal slices with THC caused shrinkage of neuronal cell bodies and nuclei as well as genomic DNA strand breaks, hallmarks of neuronal apoptosis. Neuron death induced by THC was inhibited by nonsteroidal anti-inflammatory drugs, including indomethacin and aspirin, as well as vitamin E and [...]

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Cannabidiol Counteracts the Psychotropic Side-Effects of Δ-9-Tetrahydrocannabinol in the Ventral Hippocampus through Bidirectional Control of ERK1–2 Phosphorylation, Roger Hudson et al., 2019

Cannabidiol Counteracts the Psychotropic Side-Effects of Δ-9-Tetrahydrocannabinol in the Ventral Hippocampus through Bidirectional Control of ERK1–2 Phosphorylation Roger Hudson, Justine Renard, Christopher Norris, Walter J. Rushlow and Steven R. Laviolette Journal of Neuroscience, 2019, 39, (44), 8762-8777 Doi : https://doi.org/10.1523/JNEUROSCI.0708-19.2019   Abstract Evidence suggests that the phytocannabinoids Δ-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) differentially regulate salience attribution and psychiatric risk. The ventral hippocampus (vHipp) relays emotional salience via control of dopamine (DA) neuronal activity states, which are dysregulated in psychosis and schizophrenia. Using in vivo electrophysiology in male Sprague Dawley rats, we demonstrate that intra-vHipp THC strongly increases ventral tegmental area (VTA) DA neuronal frequency [...]

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Endocannabinoid System, Aleksandra Tarasiuka et al., 2019

Endocannabinoid System Aleksandra Tarasiuka, Maciej Salagaa, and Jakub Fichna, Medical University of Lodz, Lodz, Poland Encyclopedia of Gastroenterology, 2nd Edition © 2019 Elsevier Inc. All rights reserved. https://doi.org/10.1016/B978-0-12-801238-3.65635-0   Introduction 1 Cannabinoids and Their Role in the Physiological and Pathophysiological Processes in the GI Tract 3 Physiological Conditions 3 Gut motility 3 Gastric secretion and emptying 3 Pathophysiological Conditions 4 IBS 4 IBD 5 Colon cancer 5 Peptic ulcer disease 5 Endocannabinoid System and Its Interplay With Other Systems 5 Cholecystokinin 5 Endovanilloids 6 Opioids 6 Endocannabinoid System and Gut Microbiota 6 Conclusion 7 Acknowledgments 7 References Introduction Endocannabinoid system (ECS) is one of the crucial physiological systems that may be targeted to improve human health. Endocannabinoids and their receptors are localized in various organs [...]

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Cannabinoids, Neurogenesis and Antidepressant Drugs : Is there a Link ?, Manoela Viar Fogaça et al., 2013

Cannabinoids, Neurogenesis and Antidepressant Drugs : Is there a Link ? Manoela Viar Fogaça, Ismael Galve-Roperh, Francisco Silveira Guimarães and Alline Cristina Campos Current Neuropharmacology, 2013, 11, 263-275 Abstract Similar to clinically used antidepressants, cannabinoids can also regulate anxiety and depressive symptoms. Although the mechanisms of these effects are not completely understood, recent evidence suggests that changes in endocannabinoid system could be involved in some actions of antidepressants. Chronic antidepressant treatment modifies the expression of CB1 receptors and endocannabinoid (EC) content in brain regions related to mood and anxiety control. Moreover, both antidepressant and cannabinoids activate mitogen-activated protein (MAP) kinase and phosphoinositide 3- kinase(PI3 [...]

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Bipolar disorder and the endocannabinoid system, Shokouh Arjmand et al., 2019

Bipolar disorder and the endocannabinoid system Shokouh Arjmand, Mina Behzadi, Kristi A. Kohlmeier, Shahrzad Mazhari, Abdolreza Sabahi and Mohammad Shabani Acta Neuropsychiatrica, 2019, 1-9. https://doi.org/10.1017/neu.2019.21   Abstract Objective : Bipolar disorder (BD) is a debilitating, lifelong neuropsychiatric illness characterised by unsteady mood states which vacillate from (hypo)mania to depression. Despite the availability of pharmaceutical agents which can be effective in ameliorating the acute affective symptoms and prevent episodic relapse, BD is inadequately treated in a subset of patients. The endocannabinoid system (ECS) is known to exert neuromodulatory effects on other neurotransmitter systems critical in governing emotions. Several studies ranging from clinical to molecular, as well as [...]

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