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The GABA receptors are a class of receptors that respond to the neurotransmitter gamma-aminobutyric acid (GABA), the chief inhibitory compound in the mature vertebrate central nervous system. There are two classes of GABA receptors: GABA A and GABA B .
Neurotransmitters are essential to the function of complex neural systems. The exact number of unique neurotransmitters in humans is unknown, but more than 100 have been identified. [3] Common neurotransmitters include glutamate, GABA, acetylcholine, glycine, dopamine and norepinephrine.
GABA transporters (gamma-aminobutyric acid transporters) are a family of neurotransmitter / sodium symporters, belonging to the solute carrier 6 family. [1] [2] They are found in various regions of the brain in different cell types, such as neurons and astrocytes.
Gamma-aminobutyric acid (GABA) has an inhibitory effect on brain and spinal cord activity. [17] GABA is an amino acid that is the primary inhibitory neurotransmitter for the central nervous system (CNS). It reduces neuronal excitability by inhibiting nerve transmission. GABA has a multitude of different functions during development and ...
GABA is the major inhibitory neurotransmitter in the mammalian brain where it acts on the repertoire of GABA A receptors, the ligand-gated chloride channels. It is assembled from a diverse subunit pool, including assemblies from a family of 19 subunits (α1-α6, β1-β3, γ1-γ3, δ, ∈, θ, π and ρ1-ρ3).
The following is a list of neuroactive peptides co-released with other neurotransmitters. Transmitter names are shown in bold. Norepinephrine (noradrenaline). In neurons of the A2 cell group in the nucleus of the solitary tract), norepinephrine co-exists with: Galanin; Enkephalin; Neuropeptide Y; GABA. Somatostatin (in the hippocampus ...
In the mammalian brain, two predominant, differentially expressed isoforms of the GABA B1 are transcribed from the Gabbr1 gene, GABA B(1a) and GABA B(1b), which are conserved in different species including humans. [12] This might potentially offer more complexity in terms of the function due to different composition of the receptor. [12]
GABA is also the primary inhibitory neurotransmitter in the cerebral cortex and has the highest level of expression within it. [15] The GABA affinity (K m) of the mouse isoform of GAT1 is 8 μM. [16] In the brain of a mature mammal, glutamate is converted to GABA by the enzyme glutamate decarboxylase (GAD) along with the addition of vitamin B6.