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Stran 1 iz 25 rezultatov
Highs and lows of cannabinoid-dopamine interactions: effects of genetic variability and pharmacological modulation of catechol-O-methyl transferase on the acute response to delta-9-tetrahydrocannabinol in humans.
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Genetic moderation of the effects of cannabis: catechol-O-methyltransferase (COMT) affects the impact of Δ9-tetrahydrocannabinol (THC) on working memory performance but not on the occurrence of psychotic experiences.
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Cannabis use can induce cognitive impairments and psychotic experiences. A functional polymorphism in the catechol-O-methyltransferase (COMT) gene (Val(158)Met) appears to influence the immediate cognitive and psychotic effects of cannabis, or ∆(9)-tetrahydrocannabinol (THC), its primary
The catechol-O-methyl transferase Val158Met polymorphism and susceptibility to cannabis dependence.
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Cannabis stimulates dopamine release and activates dopaminergic reward neurons in central pathways that lead to enhanced dependence. Catechol-O-methyl transferase (COMT) inactivates amplified extraneuronally released dopamine. A functional polymorphism (COMT Val158Met) resulting in increased enzyme
Catechol-O-Methyltransferase (COMT) Val158Met variations and cannabis use in first-episode non-affective psychosis: clinical-onset implications.
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New models of interaction between genetic and environmental factors have been proposed to explain the pathogenesis of schizophrenia. The Val158Met polymorphism of the COMT (Catechol-O-Methyltransferase) gene, involved in dopamine regulation and related to negative symptoms, has been previously
Adolescent cannabis use, psychosis and catechol-O-methyltransferase genotype in African Americans and Caucasians.
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Cannabis has been reported as a likely risk factor for the development of psychosis, and a gene × environment interaction with the catechol-O-methyltransferase (COMT) gene has been proposed. Moreover, COMT has been separately linked to affective symptoms in psychosis. Despite a high rate of cannabis
Association of Single Nucleotide Polymorphisms in Catechol-O-Methyltransferase and Serine-Threonine Protein Kinase Genes in the Pakistani Schizophrenic Population: A Study with Special Emphasis on Cannabis and Smokeless Tobacco.
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Schizophrenia is a neuropsychiatric disorder in which abnormalities in the prefrontal cortex lead to impaired synthesis of dopamine. It is associated with hallucination, psychosis and hearing impairments. Many susceptible genes have been identified in schizophrenia such as
Schizophrenia, cannabis use and Catechol-O-Methyltransferase (COMT): Modeling the interplay on cognition.
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Cognitive impairments are considered core features of schizophrenia and are recognized as the most important predictors of functional outcome and quality of life. A better study of the mechanisms underlying the cognition is of extreme relevance. Literature has shown that several genetic and
Moderation of the effect of adolescent-onset cannabis use on adult psychosis by a functional polymorphism in the catechol-O-methyltransferase gene: longitudinal evidence of a gene X environment interaction.
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BACKGROUND
Recent evidence documents that cannabis use by young people is a modest statistical risk factor for psychotic symptoms in adulthood, such as hallucinations and delusions, as well as clinically significant schizophrenia. The vast majority of cannabis users do not develop psychosis,
Modulation of brain structure by catechol-O-methyltransferase Val(158) Met polymorphism in chronic cannabis users.
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Neuroimaging studies have shown that chronic consumption of cannabis may result in alterations in brain morphology. Recent work focusing on the relationship between brain structure and the catechol-O-methyltransferase (COMT) gene polymorphism suggests that functional COMT variants may affect brain
The relationship between catechol-O-methyltransferase gene Val158Met (COMT) polymorphism and premorbid cannabis use in Turkish male patients with schizophrenia.
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OBJECTIVE
One of the risk factors for increasing psychotic disorders is the use of cannabis. It has been shown that the inactivation of dopamine and other catecholamines causes a common polymorphism generating substantial variations in COMT enzyme activity. We aimed to understand the role of
Genetic vs. pharmacological inactivation of COMT influences cannabinoid-induced expression of schizophrenia-related phenotypes.
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Catechol-O-methyltransferase (COMT) is an important enzyme in the metabolism of dopamine and disturbance in dopamine function is proposed to be central to the pathogenesis of schizophrenia. Clinical epidemiological studies have indicated cannabis use to confer a 2-fold increase in risk for
[Effects of oral cannabis and dronabinol on driving capacity].
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Two retrospective epidemiologic studies have shown that cannabis is the main psychoactive substance detected in the blood of drivers suspected of driving under the influence of psychotropic drugs. An oral administration double-blind crossover study was carried out with eight healthy male subjects,
An Investigation of the COMT Gene Val158Met Polymorphism in Patients Admitted to the Emergency Department Because of Synthetic Cannabinoid Use
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Catechol-O-methyl transferase (COMT) enzyme has a role in the inactivation of catecholamine neurotransmitters. Functional polymorphism in the COMT gene has been reported to play an important role in schizophrenia, bipolar affective disorder, aggressive and antisocial behavior, suicide
The interaction between cannabis use and the Val158Met polymorphism of the COMT gene in psychosis: A transdiagnostic meta - analysis.
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Neither environmental nor genetic factors are sufficient to predict the transdiagnostic expression of psychosis. Therefore, analysis of gene-environment interactions may be productive.
A meta-analysis was performed using papers investigating the interaction between cannabis use and catechol-O-methyl
The effect of childhood maltreatment and cannabis use on adult psychotic symptoms is modified by the COMT Val¹⁵⁸Met polymorphism.
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BACKGROUND
Cannabis use and childhood maltreatment are independent risk factors for the development of psychotic symptoms. These factors have been found to interact in some but not all studies. One of the reasons may be that childhood maltreatment and cannabis primarily induce psychotic symptoms in
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