Related Experiment Video

Updated: Jun 6, 2026

Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles
10:30

Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles

Published on: October 15, 2014

T-type calcium channel expression and function in the diseased heart

Leanne Cribbs1

  • 1Department of Cell and Molecular Physiology, Cardiovascular Research Institute, Loyola University Chicago, Maywood, IL, USA. lcribbs@lumc.edu

Channels (Austin, Tex.)
|December 9, 2010
PubMed

Insights

Altered intracellular calcium (Ca2+) regulation impacts heart function. This study explores T-type calcium channels (Cav3.1, Cav3.2) in cardiac disease, focusing on their regulation and functional roles in pathological conditions.

Area of Science:

  • Cardiovascular Physiology
  • Molecular Cardiology
  • Ion Channel Biology

Background:

  • Intracellular calcium (Ca2+) regulation is critical for cardiomyocyte function.
  • Dysregulation of Ca2+ influx pathways, including T-type Ca2+ channels, contributes to heart disease.
  • Cardiac T-type channels (Cav3.1 and Cav3.2) are implicated in pathological conditions but their regulation and function remain poorly understood.

Purpose of the Study:

  • To integrate existing knowledge on the regulation of cardiac T-type Ca2+ channels in animal models of cardiac disease.
  • To examine recent findings on the functional consequences of Cav3.1 and Cav3.2 expression in the diseased heart.
  • To discuss the potential role of T-type Ca2+ channels in Ca2+-dependent signaling pathways during cardiac hypertrophy.

Main Methods:

  • Review and integration of existing literature on T-type Ca2+ channel regulation in cardiac disease models.
  • Analysis of recent experimental data addressing the functional impact of Cav3.1 and Cav3.2 expression.
  • Discussion of proposed mechanisms linking T-type channels to Ca2+-dependent signaling in hypertrophy.

Main Results:

  • T-type Ca2+ channels (Cav3.1, Cav3.2) are expressed in the adult myocardium under pathological conditions.
  • Evidence suggests these channels play a role in the progression of cardiac disease.
  • Potential involvement in Ca2+-dependent signaling pathways relevant to cardiac hypertrophy is indicated.

Conclusions:

  • Understanding T-type Ca2+ channel regulation and function is crucial for addressing cardiac pathologies.
  • Cav3.1 and Cav3.2 channels represent potential therapeutic targets in cardiovascular disease.
  • Further research is needed to elucidate the precise roles of these channels in cardiac dysfunction and hypertrophy.

More Related Videos

Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry11:32

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

Published on: September 28, 2016

Isolation, Culture, and Functional Characterization of Adult Mouse Cardiomyoctyes12:49

Isolation, Culture, and Functional Characterization of Adult Mouse Cardiomyoctyes

Published on: September 24, 2013

Related Concept Videos

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
Antihypertensive Drugs: Action of Calcium Channel Blockers01:18

Antihypertensive Drugs: Action of Calcium Channel Blockers

Calcium ions are essential to contract smooth muscle cells in blood vessels. They enter these cells through voltage-dependent calcium channels, specifically L-type calcium channels in the cell membrane. These L-type calcium channels are integral to the excitation-contraction coupling process in smooth muscle. When a stimulus is received by smooth muscle cells, their membrane depolarizes. This alteration in membrane potential instigates the opening of L-type calcium channels. As a result,...
Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

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 types of...
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

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,...
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...