Related Experiment Video

Updated: Jul 4, 2026

Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry
11:32

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

Published on: September 28, 2016

Delivery of ion channel genes to treat cardiovascular diseases

James D Marsh1, Sabine Telemaque, Sung W Rhee

  • 1Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA. jdmarsh@uams.edu

Transactions of the American Clinical and Climatological Association
|July 4, 2008
PubMed

Insights

Researchers developed mutated L-type calcium channel beta subunits to manage cardiovascular conditions. These mutated subunits disrupt calcium channels, decreasing calcium current and potentially lowering blood pressure for hypertension treatment.

Area of Science:

  • Cardiovascular Science
  • Molecular Biology
  • Pharmacology

Background:

  • Ion channels, particularly calcium channels, are crucial for heart and vascular function.
  • Dysregulation of calcium channels is implicated in cardiac hypertrophy, atrial fibrillation, and hypertension.
  • Targeting ion channel function offers novel therapeutic strategies for cardiovascular diseases.

Purpose of the Study:

  • To develop and characterize mutated L-type calcium channel beta subunits.
  • To investigate the potential of these mutated subunits as a therapeutic approach for cardiovascular conditions.
  • To assess the delivery and function of these mutated subunits in vascular smooth muscle.

Main Methods:

  • Adenoviral vectors were used to deliver mutated L-type calcium channel beta subunits to vascular smooth muscle.
  • The study examined the chaperone function, cell membrane localization, and calcium current modulation of wild-type and mutated subunits.
  • In vitro and ex vivo delivery methods were employed.

Main Results:

  • Mutated beta subunits act as dominant-negative inhibitors, disrupting the function of L-type calcium channels.
  • These mutated subunits impair the targeting of the alpha(1C) subunit to the cell membrane.
  • A decrease in calcium current was observed with the mutated subunits.

Conclusions:

  • Mutated L-type calcium channel beta subunits can be effectively delivered to vascular smooth muscle.
  • These subunits have the potential to decrease arterial tone and lower blood pressure.
  • This approach offers a novel strategy for managing hypertension and other cardiovascular disorders.

More Related Videos

Delivery of Modified mRNA in a Myocardial Infarction Mouse Model06:03

Delivery of Modified mRNA in a Myocardial Infarction Mouse Model

Published on: June 11, 2020

Viral Transgene Expression in Rodent Hearts and the Assessment of Cardiac Arrhythmia Risk05:15

Viral Transgene Expression in Rodent Hearts and the Assessment of Cardiac Arrhythmia Risk

Published on: July 27, 2022

Related Concept Videos

Ion Channels01:19

Ion Channels

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 specific...
Gene Therapy00:59

Gene Therapy

Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be inserted. The...
Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: Identification of New Drug Targets

Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers01:22

Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers

Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
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...
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...