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Effects of 8 Weeks of Moderate- or High-Volume Strength Training on Sarcoplasmic Reticulum Ca Handling in Elite Female and Male Rowers.
Scand J Med Sci Sports
January 2025
Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.
While acute exercise affects sarcoplasmic reticulum (SR) function, the impact of resistance training remains unclear. The purpose of the present study was to investigate SR Ca handling plasticity in response to moderate- and high-volume strength training in elite rowers. Twenty elite male (n = 12) and female (n = 8) rowers performed three weekly strength training sessions for 8 weeks and were randomly allocated to either perform 3 sets (3-SET) or progressive increase from 5 to 10 sets (10-SET) of 10 repetitions during the training period.
View Article and Find Full Text PDFMuscle and Metabolic Genes Are Differentially Expressed During Thermal Acclimation by the Brook Trout Myotome.
J Exp Zool A Ecol Integr Physiol
January 2025
Department of Biology, Widener University, Chester, Pennsylvania, USA.
Cold-water fishes, such as Brook trout (Salvelinus fontinalis), are being challenged by the consequences of climate change. The ability of these fish to acclimate to warmer environmental conditions is vital to their survival. Acclimation to warmer water may allow brook trout to reduce the metabolic costs of higher temperatures.
View Article and Find Full Text PDFThe selective serotonin reuptake inhibitor paroxetine improves right ventricular systolic function in experimental pulmonary hypertension.
J Mol Cell Cardiol Plus
June 2024
Division of Pulmonary Circulation, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan.
Background: Pulmonary hypertension (PH) often leads to right ventricle (RV) failure, a significant cause of morbidity and mortality. Despite advancements in PH management, progression to RV maladaptation and subsequent failure remain a clinical challenge. This study explored the effect of paroxetine, a selective serotonin reuptake inhibitor (SSRI), on RV function in a rat model of PH, hypothesizing that it improves RV function by inhibiting G protein-coupled receptor kinase 2 (GRK2) and altering myofilament protein phosphorylation.
View Article and Find Full Text PDFA Drosophila cardiac myosin increases jump muscle stretch activation and shortening deactivation.
Biophys J
January 2025
Department of Biological Sciences & Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York; Department of Biomedical Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York. Electronic address:
Stretch activation (SA), a delayed increase in force production after rapid muscle lengthening, is critical to the function of vertebrate cardiac muscle and insect asynchronous indirect flight muscle. SA enables or increases power generation in muscle types used in a cyclical manner. Recently, myosin isoform expression has been implicated as a mechanism for varying the amplitude of SA in some muscle types.
View Article and Find Full Text PDFIn situ spatial transcriptomic analysis of human skeletal muscle using the Xenium platform.
Cell Tissue Res
January 2025
Department of Animal Science, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia.
Traditional transcriptomic studies often overlook the complex heterogeneity of skeletal muscle, as they typically isolate RNA from mixed muscle fibre and cell populations, resulting in an averaged transcriptomic profile that obscures fibre type-specific differences. This study assessed the potential of the recently developed Xenium platform for high-resolution spatial transcriptomic analysis of human skeletal muscle histological sections. Human vastus lateralis muscle samples from two individuals were analysed using the Xenium platform and Human Multi-Tissue and Cancer Panel targeting 377 genes complemented by staining of successive sections for Myosin Heavy Chain isoforms to differentiate between type 1 and type 2 muscle fibres.
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