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Updated: Jun 17, 2026
08:52
Generation of Murine Cardiac Pacemaker Cell Aggregates Based on ES-Cell-Programming in Combination with Myh6-Promoter-Selection
Published on: February 17, 2015
Adenylate-cyclase VI transforms ventricular cardiomyocytes into biological pacemaker cells
Arjang Ruhparwar1, Klaus Kallenbach, Gunnar Klein
1Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany. arjang.ruhparwar@med.uni-heidelberg.de
Tissue Engineering. Part A
|January 14, 2010
Summary
Adenoviral gene transfer of Adenylate-Cyclase type VI (AC-VI) successfully created a biological pacemaker in a porcine model with AV node block. This gene therapy approach offers a potential alternative to artificial pacemakers for heart rhythm disorders.
Area of Science:
- Cardiovascular Research
- Gene Therapy
- Electrophysiology
Background:
- Artificial pacemakers are necessary when heart node cells are damaged.
- Genetic therapy is being explored as a biological alternative for heart rhythm disorders.
- Cyclic AMP regulates heart rhythm by binding to HCN channels.
Purpose of the Study:
- To investigate if in vivo adenoviral gene transfer of Adenylate-Cyclase type VI (AC-VI) can establish biological pacemaker activity.
- To assess AC-VI gene transfer in a porcine model with atrioventricular (AV) node block.
Main Methods:
- Adenoviruses encoding AC-VI or Beta-Galactosidase (lacZ) were injected into the left ventricle of pigs.
- Atrioventricular (AV) node ablation was performed 12 days post-injection.
- Three-dimensional electrophysiological cardiac mapping was used to assess pacemaker activity.
Main Results:
- Animals receiving AC-VI gene transfer exhibited an escape rhythm from the left ventricular injection site at 100 beats/min.
- Control animals showed escape rhythms originating from the right ventricle.
- Western blot confirmed significantly higher AC-VI expression in the treated group.
Conclusions:
- Adenoviral-mediated AC-VI gene transfer demonstrates potential for creating a biological pacemaker.
- This approach could offer a novel therapeutic strategy for heart rhythm management.
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