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Related Concept Videos

Non-gated Ion Channels01:24

Non-gated Ion Channels

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Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
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Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

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Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
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The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

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A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
3.3K
Ion Channels01:19

Ion Channels

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The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
87.8K
Resting Potential Decay01:15

Resting Potential Decay

5.1K
The resting membrane potential of a neuron (-70mV) is sustained due to the selective ion permeability of the membrane. At the resting potential, the membrane is slightly permeable to ions like sodium (Na+) and chloride (Cl−) and highly permeable to potassium ions (K+). Differences in the ions' concentration inside the cell compared to the outside are maintained by membrane transport proteins like channels and pumps.
At rest, the K+ is the main ion that moves across the membrane...
5.1K
Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

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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: Sep 3, 2025

Patch Clamp and Perfusion Techniques for Studying Ion Channels Expressed in Xenopus oocytes
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Patch Clamp and Perfusion Techniques for Studying Ion Channels Expressed in Xenopus oocytes

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Lysosomal Potassium Channels.

Peng Huang1, Mengnan Xu2, Yi Wu1

  • 1Collaborative Innovation Center for Biomedicine, School of Clinical Medicine, Shanghai University of Medicine and Health Sciences, Shanghai, China.

Handbook of Experimental Pharmacology
|July 25, 2022
PubMed
Summary
This summary is machine-generated.

This review highlights potassium channels in lysosomes, crucial for maintaining cellular function and breakdown processes. Understanding these channels offers insights into lysosomal health and disease.

Keywords:
BK channelLysosomePotassium channelTMEM175

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Area of Science:

  • Cell Biology
  • Organelle Biology
  • Membrane Transport

Background:

  • Lysosomes are vital acidic organelles for cellular degradation via pathways like autophagy and endocytosis.
  • Integral membrane proteins, including ion channels, regulate the lysosome's internal environment for optimal function.
  • Potassium (K+) channels are well-studied in the plasma membrane but their roles within intracellular compartments remain largely unknown.

Approach:

  • This review synthesizes recent research on lysosomal K+ channels.
  • It focuses on characterizing these channels and their functional significance.
  • The review also explores the pathological implications of dysregulated lysosomal K+ transport.

Key Points:

  • Lysosomal K+ channels are integral membrane proteins that control potassium ion flux.
  • They play a critical role in maintaining the lysosome's membrane potential and acidic pH.
  • Understanding lysosomal K+ channels is essential for comprehending cellular homeostasis and disease.

Conclusions:

  • Recent advancements have shed light on the characterization and function of K+ channels within lysosomes.
  • These channels are critical regulators of lysosomal function and membrane potential.
  • Further research into lysosomal K+ channels holds promise for understanding and treating various pathologies.