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Related Concept Videos

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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Ion Channels01:19

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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...
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Cardiac Action Potential01:30

Cardiac Action Potential

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Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
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Ionic Basis of Cardiac Action Potentials
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Electrophysiology of Normal Cardiac Rhythm01:19

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The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
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Specialized Characteristics of Cardiac Muscles01:27

Specialized Characteristics of Cardiac Muscles

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The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
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The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

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The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
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Related Experiment Video

Updated: Oct 19, 2025

Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry
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Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry

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Mitochondrial ion channels in cardiac function.

Harpreet Singh1

  • 1Department of Physiology and Cell Biology, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University College of Medicine, Columbus, Ohio.

American Journal of Physiology. Cell Physiology
|September 22, 2021
PubMed
Summary
This summary is machine-generated.

Mitochondrial ion channels are crucial for heart energy and function. Disruptions in these channels lead to heart failure, highlighting their potential as therapeutic targets for cardiac diseases.

Keywords:
bioenergeticscardiac functioncardioprotectionion channelsmitochondria

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A Flow Cytometry-based Assay for Measuring Mitochondrial Membrane Potential in Cardiac Myocytes After Hypoxia/Reoxygenation
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Related Experiment Videos

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Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry

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Voltage-Dependent Potassium Current Recording on H9c2 Cardiomyocytes via the Whole-Cell Patch-Clamp Technique
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A Flow Cytometry-based Assay for Measuring Mitochondrial Membrane Potential in Cardiac Myocytes After Hypoxia/Reoxygenation
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Area of Science:

  • Cardiology
  • Mitochondrial Biology
  • Molecular Physiology

Background:

  • Mitochondria are vital for cardiac energy production via oxidative metabolism.
  • Mitochondrial dysfunction is a key factor in heart failure development.
  • Ionic homeostasis within mitochondria is critical for maintaining cardiac contractile function.

Purpose of the Study:

  • To review the role of mitochondrial ion channels in cardiac function.
  • To highlight the significance of mitochondrial ion channels in cardiovascular health.
  • To discuss the therapeutic potential of targeting mitochondrial ion channels in cardiac diseases.

Main Methods:

  • Literature review of mitochondrial ion channel research.
  • Analysis of the relationship between ionic homeostasis and mitochondrial function.
  • Exploration of novel proteins identified on mitochondrial membranes.

Main Results:

  • Mitochondrial ion channels and transporters are essential for maintaining ionic homeostasis and energy demands in the heart.
  • Disruptions in mitochondrial ionic balance lead to dysfunction and contractile failure.
  • Novel mitochondrial membrane proteins are emerging as critical players in organelle physiology.

Conclusions:

  • Mitochondrial ion channels play a diverse and unique role in cardiac function.
  • Understanding the molecular identity and function of these channels is a major research focus.
  • Mitochondrial ion channels represent promising therapeutic targets for treating cardiac diseases.