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Ladder-based resistance training with the progression of training load altered the tibial nerve ultrastructure and muscle fiber area without altering the morphology of the postsynaptic compartment.
Front Physiol
April 2024
Department of Morphology and Genetics, Universidade Federal de São Paulo, São Paulo, Brazil.
Scientific evidence regarding the effect of different ladder-based resistance training (LRT) protocols on the morphology of the neuromuscular system is scarce. Therefore, the present study aimed to compare the morphological response induced by different LRT protocols in the ultrastructure of the tibial nerve and morphology of the motor endplate and muscle fibers of the soleus and plantaris muscles of young adult Wistar rats. Rats were divided into groups: sedentary control (control, n = 9), a predetermined number of climbs and progressive submaximal intensity (fixed, n = 9), high-intensity and high-volume pyramidal system with a predetermined number of climbs (Pyramid, n = 9) and lrt with a high-intensity pyramidal system to exhaustion (failure, n = 9).
View Article and Find Full Text PDFCompression Fractures and Partial Phenotype Rescue With a Low Phosphorus Diet in the Zebrafish Osteogenesis Imperfecta Model.
Front Endocrinol (Lausanne)
April 2022
Evolutionary Developmental Biology Group, Department of Biology, Ghent University, Gent, Belgium.
Osteogenesis imperfecta (OI) is a group of heritable disorders affecting bone and other connective tissues. Dominant OI forms are mainly caused by mutations in collagen type I. Patients suffer from skeletal deformities, fractures of long bones and vertebral compression fractures from early childhood onward.
View Article and Find Full Text PDFEffect of chronic intermittent hypoxia (CIH) on neuromuscular junctions and mitochondria in slow- and fast-twitch skeletal muscles of mice-the role of iNOS.
Skelet Muscle
February 2022
Department of Medical Cell Biology, Institute of Anatomy and Cell Biology, Philipps-University Marburg, Robert-Koch-Straße 8, 35032, Marburg, Germany.
Background: Obstructive sleep apnea (OSA) imposes vascular and metabolic risks through chronic intermittent hypoxia (CIH) and impairs skeletal muscle performance. As studies addressing limb muscles are rare, the reasons for the lower exercise capacity are unknown. We hypothesize that CIH-related morphological alterations in neuromuscular junctions (NMJ) and mitochondrial integrity might be the cause of functional disorders in skeletal muscles.
View Article and Find Full Text PDFbFGF-chitosan scaffolds effectively repair 20 mm sciatic nerve defects in adult rats.
Biomed Mater
February 2021
Beijing Key Laboratory for Biomaterials and Neural Regeneration, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, People's Republic of China.
The repair of peripheral nerve injury is still a great challenge in clinic. Autologous nerve transplantation is the gold standard for the treatment of long-distance peripheral nerve defects, but this method remains associated with high morbidity of the donor site and lack of matching donor. In this study, a novel chitosan scaffold (CS) loaded with control-released basic fibroblast growth factor (bFGF) was used to repair 20 mm sciatic nerve defects in adult rat.
View Article and Find Full Text PDFBiological activities of a new crotamine-like peptide from Crotalus oreganus helleri on C2C12 and CHO cell lines, and ultrastructural changes on motor endplate and striated muscle.
Toxicon
December 2020
National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, Kingsville, TX, USA; Department of Chemistry, Texas A&M University-Kingsville, Kingsville, TX, USA. Electronic address:
Crotamine and crotamine-like peptides are non-enzymatic polypeptides, belonging to the family of myotoxins, which are found in high concentration in the venom of the Crotalus genus. Helleramine was isolated and purified from the venom of the Southern Pacific rattlesnake, Crotalus oreganus helleri. This peptide had a similar, but unique, identity to crotamine and crotamine-like proteins isolated from other rattlesnakes species.
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