Anthropomorphizing the mouse cardiac action potential via a novel dynamic clamp method.

Area of Science:

• Computational biology
• Cardiovascular research
• Pharmacology

Background:

• Interspecies differences in cardiac electrodynamics pose challenges for translating findings from animal models to human pathophysiology.
• Extrapolating drug or mutation effects from mouse models to humans is difficult due to significant differences in cardiac electrical activity.

Purpose of the Study:

• To present a hybrid computational-experimental technique, the cell-type transforming clamp, to overcome interspecies differences in excitable cells.
• To enable the conversion of macroscopic electrical behavior of isolated cells from one type to another.

Main Methods:

• The cell-type transforming clamp utilizes a calculated compensatory current to alter the electrical behavior of isolated cells.
• This technique was demonstrated by transforming murine cardiomyocytes to exhibit human myocyte electrodynamics.
• The method was used to evaluate drug-induced arrhythmogenicity in transformed mouse cardiomyocytes.

Main Results:

• The cell-type transforming clamp successfully converted the electrical behavior of murine cardiomyocytes to mimic human myocytes.
• The technique allowed for the evaluation of drug arrhythmogenicity in a human-like electrophysiological context using mouse cells.
• This demonstrates the utility of the method for assessing drug effects across species.

Conclusions:

• The cell-type transforming clamp is a powerful tool for overcoming interspecies electrophysiological differences in excitable cells.
• This technique enhances the translational value of studies using model organisms for human disease and drug development.
• The method is adaptable for converting between the action potential morphologies of various cell types.