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Related Concept Videos

Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

Ligand-Gated Ion Channel Receptor: Gating Mechanism

Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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Antiepileptic Drugs: GABAergic Pathway Potentiators

γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for their...
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Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high affinity and are together...
G-Protein Gated Ion Channels01:21

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GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...
G Protein-coupled Receptors01:15

G Protein-coupled Receptors

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G Protein-coupled Receptors01:15

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Related Experiment Video

Updated: May 18, 2026

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
07:51

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors

Published on: November 14, 2014

Structure, function, and modulation of GABA(A) receptors.

Erwin Sigel1, Michael E Steinmann

  • 1Institute of Biochemistry and Molecular Medicine, University of Bern, CH-3012 Bern, Switzerland. erwin.sigel@ibmm.unibe.ch

The Journal of Biological Chemistry
|October 6, 2012
PubMed
Summary
This summary is machine-generated.

Gamma-aminobutyric acid type A (GABA(A)) receptors are key inhibitory neurotransmitters in the brain, with diverse functions and drug responses. Their exact number of isoforms and precise roles in synaptic and extrasynaptic inhibition require further clarification.

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Last Updated: May 18, 2026

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
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Published on: November 14, 2014

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Published on: July 17, 2011

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pharmacology

Background:

  • GABA(A) receptors are the primary inhibitory neurotransmitter receptors in the mammalian brain.
  • They comprise five subunits forming a chloride channel, crucial for neuronal function.
  • These receptors are implicated in various physiological and pathological processes.

Purpose of the Study:

  • To elucidate the diverse roles and characteristics of GABA(A) receptor isoforms.
  • To investigate the mechanisms underlying synaptic and extrasynaptic inhibition mediated by GABA(A) receptors.
  • To explore the pharmacological implications of GABA(A) receptor subtypes.

Main Methods:

  • Analysis of GABA(A) receptor subunit composition.
  • Electrophysiological recordings to study receptor function.
  • Pharmacological profiling of different GABA(A) receptor subtypes.

Main Results:

  • GABA(A) receptors exhibit distinct localization in postsynaptic and extrasynaptic membranes.
  • Postsynaptic receptors mediate rapid neuronal inhibition, while extrasynaptic receptors control long-term inhibition.
  • Receptor isoforms show differential sensitivity to various drugs, including benzodiazepines.

Conclusions:

  • GABA(A) receptors play critical roles in both fast and slow inhibitory neurotransmission.
  • The heterogeneity of GABA(A) receptor isoforms contributes to their diverse functions.
  • Understanding these receptors is vital for developing targeted therapies for neurological disorders.