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Side 1 fra 66 resultater
Effects of cannabinoids on prolactin and gonadotrophin secretion: involvement of changes in hypothalamic gamma-aminobutyric acid (GABA) inputs.
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CB1 cannabinoid receptors are located in hypothalamic nuclei and their activation alters several hypothalamic neurotransmitters resulting in, among other things, decreased prolactin (PRL) and luteinizing hormone (LH) secretion from the anterior pituitary gland. In the present study, we addressed two
Epileptiform activity in the CA1 region of the hippocampus becomes refractory to attenuation by cannabinoids in part because of endogenous γ-aminobutyric acid type B receptor activity.
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The anticonvulsant properties of marijuana have been known for centuries. The recently characterized endogenous cannabinoid system thus represents a promising target for novel anticonvulsant agents; however, administration of exogenous cannabinoids has shown mixed results in both human epilepsy and
Activation of the cannabinoid receptor by delta 9-tetrahydrocannabinol reduces gamma-aminobutyric acid uptake in the globus pallidus.
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The interaction between GABA (gamma-aminobutyric acid) and cannabinoids in the globus pallidus was investigated by evaluating the effects of delta 9-tetrahydrocannabinol on [3H]GABA uptake into slices of rat globus pallidus. delta 9-Tetrahydrocannabinol caused a concentration-dependent decrease in
Abnormal sensitivity to cannabinoid receptor stimulation might contribute to altered gamma-aminobutyric acid transmission in the striatum of R6/2 Huntington's disease mice.
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BACKGROUND
One of the earliest neurochemical alterations observed in both Huntington's disease (HD) patients and HD animal models is the dysregulation of the endocannabinoid system, an alteration that precedes the development of identifiable striatal neuropathology. How this alteration impacts
The gamma-aminobutyric acid system in rat cerebellum during cannabinoid-induced cataleptoid state.
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Repeated, but not single, intraperitoneal injections of delta1,6-tetrahydrocannabinol (delta1,6-THC) 20 mg/kg to rats administered daily for two weeks, produced increased gamma-aminobutyric acid (GABA) concentration and decreased glutamic acid decarboxylase (GAD) activity in the cerebellum, as well
Cannabinoid receptor agonist WIN 55,212-2 inhibits rat cortical dialysate gamma-aminobutyric acid levels.
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The effects of the cannabinoid receptor agonist WIN 55,212-2 (0.1-5 mg/kg i.p.) on endogenous extracellular gamma-aminobutyric acid (GABA) levels in the cerebral cortex of the awake rat was investigated by using microdialysis. WIN 55,212-2 (1 and 5 mg/kg i.p.) was associated with a
Interaction between gamma-aminobutyric acid GABAB and cannabinoid CB1 receptors in spinal pain pathways in rat.
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Antinociceptive effects of cannabinoids are mediated, in part, at the spinal level. Cannabinoid CB1 receptors are co-localized with dorsal horn interneurons containing gamma-aminobutyric acid (GABA). In this study, we investigated the interaction between intrathecally administered cannabinoid and
Cannabinoid Exposure via Lactation in Rats Disrupts Perinatal Programming of the Gamma-Aminobutyric Acid Trajectory and Select Early-Life Behaviors.
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BACKGROUND
Cannabis usage is increasing with its widespread legalization. Cannabis use by mothers during lactation transfers active cannabinoids to the developing offspring during this critical period and alters postnatal neurodevelopment. A key neurodevelopmental landmark is theModulation of the release of endogenous gamma-aminobutyric acid by cannabinoids in the guinea pig ileum.
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Interactions between cannabinoid CB(1) and GABA receptors and ligands were investigated in the myenteric plexus-longitudinal muscle of the guinea pig ileum. Electrically evoked contractions of the myenteric plexus-longitudinal muscle were inhibited by the cannabinoid receptor agonist CP55,940
Heteromer formation between cannabinoid type 1 and dopamine type 2 receptors is altered by combination cannabinoid and antipsychotic treatments
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The cannabinoid type 1 (CB1 ) receptor and the dopamine type 2 (D2 ) receptor are co-localized on medium spiny neuron terminals in the globus pallidus where they modulate neural circuits involved in voluntary movement. Physical interactions between the two receptors have been
Analysis of the endocannabinoid system by using CB1 cannabinoid receptor knockout mice.
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The endocannabinoid system has been involved in the control of several neurophysiological and behavioural responses. To date, three lines of CB1 knockout mice have been established independently in different laboratories. This chapter reviews the main results obtained with these lines of CB1
Neurocognitive effects of cannabis: Lessons learned from human experimental studies.
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The following chapter offers an overview of results of experimental studies conducted among healthy individuals examining the effects of acute administration of Δ9-THC and other cannabinoids, alone or in combination, on brain function and behavior, also as a function of previous cannabis exposure.
Cannabinoids: influence on neurotransmitter uptake in rat brain synaptosomes.
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We have examined the effect of Delta1-tetrahydrocannabinol (delat1-THC) and 12 of its derivatives on the uptake of 3H-labeled norepinephrine (NE), dopamine (DA), serotonin (5-HT) gamma-aminobutyric acid (GABA) into synaptosomes in homogenates of various regions of rat brain. Delta1-THC inhibits the
Ventral tegmental area cannabinoid type-1 receptors control voluntary exercise performance.
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BACKGROUND
We have shown that the endogenous stimulation of cannabinoid type-1 (CB₁) receptors is a prerequisite for voluntary running in mice, but the precise mechanisms through which the endocannabinoid system exerts a tonic control on running performance remain unknown.
METHODS
We analyzed the
Cannabinoid CB1 receptor and serotonin 3 receptor subunit A (5-HT3A) are co-expressed in GABA neurons in the rat telencephalon.
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Among all described serotonin (5-HT) receptors in mammals, the type three (5-HT3) is the only ligand-gated ion channel receptor for serotonin. By using double in situ hybridization histochemistry, we found co-expression of the functional 5-HT3A subunit of the 5-HT3 receptor and the central CB1
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