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Mitochondria are key regulators of metabolism and ATP supply in skeletal muscle, while circadian rhythms influence many physiological processes. However, whether mitochondrial function is intrinsically regulated in a circadian manner in mouse skeletal muscle is inadequately understood. Accordingly, we measured post-absorptive transcript abundance of markers of mitochondrial biogenesis, dynamics, and metabolism (extensor digitorum longus [EDL], soleus, gastrocnemius), protein abundance of electron transport chain complexes (EDL and soleus), enzymatic activity of SDH (tibialis anterior and plantaris), and maximum uncoupled respiration (tibialis anterior) in different skeletal muscles from female C57BL/6NJ mice at four zeitgeber times (ZT), ZT 1, 7, 13, and 19.
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The Joint Department of Biomedical Engineering, the University of North Carolina at Chapel Hill, Chapel Hill, NC, United States; North Carolina State University, Raleigh, NC, United States.
Throughout childhood growth and development, both the nervous and the musculoskeletal systems undergo rapid change. The goal of this study was to examine the impact of growth-related changes in skeletal size and muscle strength on the neural control of finger force generation. By modifying an existing OpenSim hand model in accordance with pediatric anthropometric data, we created 10 distinct models representing males and females at each year of development from 6 to 10 years old.
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BiOSSE, Biology of Organisms, Stress, Health, Environment, Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, 53020 Laval, France.
Background: Physical activity, such as running, protects against cardiovascular disease and obesity but can induce oxidative stress. Athletes often consume antioxidants to counteract the overproduction of reactive oxygen and nitrogen species during exercise. , particularly its phycocyanin content, activates the Nrf2 pathway, stimulating antioxidant responses.
View Article and Find Full Text PDFBrain-derived neurotrophic factor drives muscle adaptation similar to aerobic training in mice.
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Department of Health Sciences, Faculty of Applied Health Sciences, Brock University, St. Catharines, Ontario, Canada.
This study, in vivo and in vitro, investigated the role of brain-derived neurotrophic factor (BDNF) in skeletal muscle adaptations to aerobic exercise. BDNF is a contraction-induced protein that may play a role in muscle adaptations to aerobic exercise. BDNF is involved in muscle repair, increased fat oxidation, and mitochondrial biogenesis, all of which are adaptations observed with aerobic training.
View Article and Find Full Text PDFMuscle fiber types switched during the development of experimental autoimmune myasthenia gravis via the PI3K/Akt signaling pathway.
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Department of Neurobiology, Harbin Medical University Provincial Key Lab of Neurobiology, School of Basic Medical Science, Harbin Medical University, Heilongjiang, China. Electronic address:
As one of the largest organs of our human body, skeletal muscle has good research prospects in myasthenia gravis (MG), the symptoms of which include systemic skeletal muscle weakness. Skeletal muscle is composed of two types of muscle fibers. Different fiber subtypes can be converted into each other; however, the underlying mechanism is not yet clear.
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