Key result
DBA/2J mice showed no evidence of hypertrophic cardiomyopathy or cardiac functional deficits over 12 months, supporting their use as a background strain for genetic modeling of cardiac diseases.
Why the study?
The use of the D2.mdx mouse as a preclinical model for DMD cardiomyopathy was criticized due to speculation that the DBA/2J background displays inherent hypertrophic cardiomyopathy.
Does the DBA/2J mouse strain exhibit an inherent hypertrophic cardiomyopathy phenotype over a 12-month period?
Population
Sedentary and exercised DBA/2J mice, plus healthy canine and human samples
Comparison
Sedentary vs exercised DBA/2J mice and DBA/2J mice vs healthy canine and human samples
Design
Preclinical longitudinal study
Follow-up
12-month period
Authors
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DBA/2J mice remain suitable controls for cardiac genetic models; leaves open validation in disease-specific strains before broader adoption.
Does the DBA/2J mouse strain exhibit an inherent hypertrophic cardiomyopathy phenotype over a 12-month period?
The DBA/2J mouse strain does not exhibit an inherent hypertrophic cardiomyopathy phenotype, supporting its use as an appropriate background strain for genetic modeling of cardiac diseases such as Duchenne muscular dystrophy.
Hart et al. (2022) studied Cardiomyopathy / Duchenne muscular dystrophy. DBA/2J mouse strain vs. Healthy canine and human samples (for collagen comparison) was evaluated on Cardiac status including left ventricular collagen, wall thickening, and functional deficits. DBA/2J mice showed no evidence of hypertrophic cardiomyopathy or cardiac functional deficits over 12 months, supporting their use as a background strain for genetic modeling of cardiac diseases.
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