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Related Concept Videos

Overview of Synapses01:25

Overview of Synapses

A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
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...
Electrical Synapses01:28

Electrical Synapses

Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein01:20

Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein

Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain.
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
Antiepileptic Drugs: GABAergic Pathway Potentiators01:18

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...
Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...

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Updated: May 25, 2026

Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
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Published on: December 18, 2016

Astrocyte dysfunction in temporal lobe epilepsy: K+ channels and gap junction coupling.

Christian Steinhäuser1, Gerald Seifert, Peter Bedner

  • 1Institute of Cellular Neurosciences, University of Bonn, Bonn, Germany. christian.steinhaeuser@ukb.uni-bonn.de

Glia
|February 14, 2012
PubMed
Summary

Dysfunctional astrocytes, particularly impaired potassium (K+) buffering by Kir4.1 channels, are implicated in epilepsy. Targeting astrocytes offers a promising new avenue for antiepileptic therapies.

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Last Updated: May 25, 2026

Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
09:32

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Published on: December 18, 2016

Analyzing the Size, Shape, and Directionality of Networks of Coupled Astrocytes
10:10

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Published on: October 4, 2018

Multi-electrode Array Recordings of Human Epileptic Postoperative Cortical Tissue
13:14

Multi-electrode Array Recordings of Human Epileptic Postoperative Cortical Tissue

Published on: October 26, 2014

Area of Science:

  • Neuroscience
  • Cellular Biology
  • Epilepsy Research

Background:

  • Astrocytes are glial cells in the central nervous system (CNS) that regulate neuronal activity and maintain homeostasis.
  • They play critical roles in ion balance, neurotransmitter clearance, and energy metabolism.
  • Recent evidence highlights astrocyte dysfunction in epilepsy pathogenesis.

Purpose of the Study:

  • To investigate the role of astrocytes in epilepsy.
  • To examine the function of astroglial inwardly rectifying potassium (Kir) channels, specifically Kir4.1, in epilepsy.
  • To explore astrocytes as potential therapeutic targets for epilepsy.

Main Methods:

  • Investigation of patient specimens from pharmacoresistant temporal lobe epilepsy.
  • Analysis of epilepsy models.
  • Examination of expression, localization, and function of astroglial Kir channels, particularly Kir4.1.

Main Results:

  • Alterations in expression, localization, and function of Kir4.1 channels were observed in epilepsy.
  • Impaired K+ buffering by astrocytes is suspected due to these alterations.
  • Gap junctions in astrocytes play a dual role in neuronal hyperactivity and energy supply.

Conclusions:

  • Astrocyte dysfunction, including impaired K+ handling, is a key factor in epilepsy generation and spread.
  • Astrocytes are crucial players in the pathophysiology of epilepsy.
  • Targeting astrocytes represents a promising strategy for novel antiepileptic treatments.