Roles of ATP and SERCA in the Regulation of Calcium Turnover in Unloaded Skeletal Muscles: Current View and Future Directions
Overview
Chemistry
Molecular Biology
Affiliations
A decrease in skeletal muscle contractile activity or its complete cessation (muscle unloading or disuse) leads to muscle fibers' atrophy and to alterations in muscle performance. These changes negatively affect the quality of life of people who, for one reason or another, are forced to face a limitation of physical activity. One of the key regulatory events leading to the muscle disuse-induced changes is an impairment of calcium homeostasis, which leads to the excessive accumulation of calcium ions in the sarcoplasm. This review aimed to analyze the triggering mechanisms of calcium homeostasis impairment (including those associated with the accumulation of high-energy phosphates) under various types of muscle unloading. Here we proposed a hypothesis about the regulatory mechanisms of SERCA and IP3 receptors activity during muscle unloading, and about the contribution of these mechanisms to the excessive calcium ion myoplasmic accumulation and gene transcription regulation via excitation-transcription coupling.
Role of PI3 Kinases in Cell Signaling and Soleus Muscle Atrophy During Three Days of Unloading.
Zaripova K, Belova S, Kostrominova T, Shenkman B, Nemirovskaya T Int J Mol Sci. 2025; 26(1.
PMID: 39796270 PMC: 11720661. DOI: 10.3390/ijms26010414.
Braun J, Fajardo V NPJ Microgravity. 2024; 10(1):78.
PMID: 39030182 PMC: 11271499. DOI: 10.1038/s41526-024-00419-y.
Abid M, Bredahl E, Clifton A, Qiu H, Andrews M, Checco J J Proteome Res. 2023; 23(1):215-225.
PMID: 38117800 PMC: 10843731. DOI: 10.1021/acs.jproteome.3c00540.
Calcium Homeostasis, Transporters, and Blockers in Health and Diseases of the Cardiovascular System.
Bkaily G, Jacques D Int J Mol Sci. 2023; 24(10).
PMID: 37240147 PMC: 10218565. DOI: 10.3390/ijms24108803.
Sharlo K, Lvova I, Belova S, Zaripova K, Shenkman B, Nemirovskaya T Int J Mol Sci. 2023; 24(1).
PMID: 36613942 PMC: 9820761. DOI: 10.3390/ijms24010503.