Why the study?
Striated muscle contraction is regulated by Ca2+ and temperature, but the temperature dependence of sarcomere shortening and thin filament sliding across muscle types requires clarification.
Population
Isolated fast skeletal myofibrils and reconstituted fast skeletal or cardiac thin filaments on fast skeletal or beta-cardiac myosin
Comparison
Fast skeletal vs beta-cardiac myosin and fast skeletal vs cardiac thin filaments under varying temperatures
Design
In vitro experimental biophysical study
Authors
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Temperature may activate thin filaments without Ca²⁺; leaves open relevance to cardiac contractility in vivo.
Mammalian striated muscle contraction is fine-tuned via complementary regulation of myosin and tropomyosin-troponin within the body temperature range.
Ishii et al. (2023) studied this question.
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