The functional state of RyR depends on the intracellular calcium concentration and on the oxidation state of its protein components in some particular sites and of some sentinel amino acids. In addition to the regulation of the RyR channel by exogenous substances (caffeine, ryanodine), ions environmental situations (oxidative state), other components, such as some endogenous proteins present in the sarcoplasm and/or in muscle membranes that are able to determine changes in Ca channel activity. Among these, calmodulin and S-100A could determine modifications in the status of RyR channel in the skeletal muscle. The currently available data can be justified the use of a simplified S-100/CaM and RyR interaction model for the regulation of Ca release in skeletal muscle. Under resting conditions, the CaM/S100A1 binding domain on RyR is predominantly dependent on S100A1. Vice versa when the intracellular Ca concentration becomes high as well as during repetitive (tetanus) stimulation, the Ca-CaM bond becomes dominant, shifting S100A1 from RyR and promoting channel inactivation. This may be one of the mechanism of muscle fatigue.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254442 | PMC |
| http://dx.doi.org/10.4081/ejtm.2019.8839 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Dynamical effects of Mechano-Chemo-Transduction on Cardiac Alternans.
Biophys J
January 2025
Department of Pharmacology, University of California Davis, California 95616.
In every heartbeat, cardiac muscle cells perform excitation-Ca signaling-contraction (EC) coupling to pump blood against the vascular resistance. Cardiomyocytes can sense the mechanical load and activate mechano-chemo-transduction (MCT) mechanism, which provides feedback regulation of EC coupling. MCT feedback is important for the heart to upregulate contraction in response to increased load to maintain cardiac output.
View Article and Find Full Text PDFModulatory roles of capsaicin on thermogenesis in C2C12 myoblasts and the skeletal muscle of mice.
Chem Biol Interact
January 2025
Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk, 38453, Republic of Korea. Electronic address:
Capsaicin, a polyphenol, is known to regulate energy expenditure and thermogenesis in adipocytes and muscles. However, its role in modulating uncoupling proteins (UCPs) and adenosine triphosphate (ATP)-dependent thermogenesis in muscles remains unclear. This study investigated the mechanisms underlying the role of capsaicin in modulating the UCP- and ATP-dependent thermogenesis in C2C12 myoblasts, as well as the gastrocnemius (GM) and soleus muscles (SM) of mice.
View Article and Find Full Text PDFChannels, Transporters, and Receptors at Membrane Contact Sites.
Contact (Thousand Oaks)
December 2024
Department of Physiology and Membrane Biology, University of California, Davis, CA, USA.
Membrane contact sites (MCSs) are specialized regions where two or more organelle membranes come into close apposition, typically separated by only 10-30 nm, while remaining distinct and unfused. These sites play crucial roles in cellular homeostasis, signaling, and metabolism. This review focuses on ion channels, transporters, and receptors localized to MCSs, with particular emphasis on those associated with the plasma membrane and endoplasmic reticulum (ER).
View Article and Find Full Text PDFBackground: This study investigates the effects of intranasal dantrolene nanoparticles on inflammation and programmed cell death by pyroptosis in 5XFAD Alzheimer's Disease (AD) mice.
Methods: 5XFAD and wild type (WT) B6SJLF1/J mice were treated with intranasal dantrolene nanoparticles (5 mg/kg), daily, Monday to Friday, for 12 weeks continuously, starting at 9 months of age. Blood and brain were harvested at 13 months of age, one month after completion of 12 weeks intranasal dantrolene nanoparticle treatment.
Goose astrovirus induces apoptosis and endoplasmic reticulum stress in gosling hepatocytes.
Poult Sci
January 2025
Jiangxi Provincial Key Laboratory for Animal Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, China. Electronic address:
The ongoing Goose astrovirus (GoAstV) epidemic, which primarily infects goslings causing severe liver damage, has inflicted considerable damage on the poultry industry. Endoplasmic reticulum stress (ERS) is a significant modulator of several viral infections, while severe ERS may result in apoptosis. This study examined the roles and possible mechanisms of ERS and apoptosis in GoAstV-induced liver injury in goslings.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!