Why the study?
Exercise produces cardioprotective effects and reverses cardiac dysfunction, but the underlying cellular and molecular mechanisms remain incompletely understood.
Does endurance exercise training improve myocardial dysfunction and alter fibronectin-mediated mechanotransduction in a swine model of ischemic heart disease?
Does endurance exercise training improve myocardial dysfunction and alter fibronectin-mediated mechanotransduction in a swine model of ischemic heart disease?
In a swine model of ischemic heart disease, endurance exercise training ameliorates cardiac remodeling and enhances myocardial force generation through a fibronectin-β1 integrin mechanotransduction pathway.
Hypothesis-generating for fibronectin-integrin mechanisms in ischemic models; leaves open translation to human HF therapy.
Exercise produces cardioprotective effects and reverses cardiac dysfunction, but underlying cellular and molecular mechanisms are not fully identified. This study revealed that endurance exercise increased fibronectin expression in the myocardium of ischemic swine hearts and enhanced myocyte adhesion with α 5 β 1 integrin, cell stiffness, and force generation, which was blunted by focal adhesion kinase inhibition. Thus, endurance exercise reverses cardiac dysfunction by promoting fibronectin interactions with integrins supporting this mechanotransduction pathway as a potential therapeutic target.
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Lee et al. (2025) studied this question.
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