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3D model of 2-Arachidonoylglycerol, an endocannaboid. The endocannabinoid system (ECS) is a biological system composed of endocannabinoids, which are neurotransmitters that bind to cannabinoid receptors, and cannabinoid receptor proteins that are expressed throughout the central nervous system (including the brain) and peripheral nervous system.
The CB1 receptor is recognized as the most abundant metabotropic receptor in the brain. [10] CB1 receptors are found moderately to highly expressed within the cerebral cortex (cingulate gyrus, prefrontal cortex, and hippocampus), periaqueductal gray, hypothalamus, amygdala, cerebellum, and basal ganglia (globus pallidus, substantia nigra). [31]
The existence of cannabinoid receptors in the brain was discovered from in vitro studies in the 1980s, with the receptor designated as the cannabinoid receptor type 1 or CB1. [14] [15] The DNA sequence that encodes a G-protein-coupled cannabinoid receptor in the human brain was identified and cloned in 1990.
The discovery of the first cannabinoid receptors in the 1980s helped to resolve this debate. [10] These receptors are common in animals. Two known cannabinoid receptors are termed CB 1 and CB 2, [11] with mounting evidence of more. [12] The human brain has more cannabinoid receptors than any other G protein-coupled receptor (GPCR) type. [13]
In the brain of Alzheimer's patients, both neuronal nicotinic acetylcholine (nACh) receptors and NMDA receptors are known to be down-regulated. Thus, four anticholinesterases, such as Donepezil and Rivastigmine , have been developed and approved by the U.S. Food and Drug Administration (FDA) for the treatment in the U.S.A.
[1] [2] THC and CBD are stored mostly in the trichomes of the plant, [3] and can cause psychological and physical impairment in the user, via the endocannabinoid system and unique receptors. [ 4 ] [ 5 ] THC increases dopamine levels in the brain, which attributes to the euphoric and relaxed feelings cannabis provides.
This is an accepted version of this page This is the latest accepted revision, reviewed on 15 January 2025. Plant species, recreational drug (kratom) Mitragyna speciosa Conservation status Least Concern (IUCN 3.1) Scientific classification Kingdom: Plantae Clade: Tracheophytes Clade: Angiosperms Clade: Eudicots Clade: Asterids Order: Gentianales Family: Rubiaceae Genus: Mitragyna Species: M ...
Dopamine receptors are a class of G protein-coupled receptors that are prominent in the vertebrate central nervous system (CNS) and are implicated in many neurological processes, including motivational and incentive salience, cognition, memory, learning, and fine motor control, as well as modulation of neuroendocrine signaling.