Key result
Warm acclimation increases crucian carp heart rate and shortens contraction duration via mixed myosin expression.
Population
Crucian carp (Carassius carassius L.) hearts
Comparison
Seasonal changes and warm temperature acclimation vs Seasonal changes and cold temperature acclimation
Design
Preclinical
Authors
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Animal data suggest myosin plasticity aids cardiac adaptation in ectotherms; leaves open translation to mammalian or human hearts.
Temperature acclimation and seasonal changes alter myosin heavy chain composition and ATPase activity in crucian carp hearts, adapting the cardiovascular system to environmental conditions.
Matti Vornanen (1994) studied this question. Warm temperature acclimation and summer season vs. Cold temperature acclimation (2 degrees C) and winter season was evaluated on Myosin heavy chain composition and heart rate. Warm-acclimated crucian carp expressed both summer and winter myosin heavy chains, resulting in higher ATPase activity, higher in vitro heart rate, and shorter contraction duration.
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