Quantitative electron microscopic study of the innervation of different types of specialized sinus node conducting myocytes and of working myocytes in the perinodal myocardium of the right atrium was carried out in intact dogs. Differences were found in diameters of unmyelinated nervous fibers and their efferent terminals and distances between them and sarcolemmas of myocytes of the types studied. It was demonstrated that qualitatively different synaptic vesicles in the efferent terminals near the nodal and working myocytes are encountered with different frequency. Similar parameters of innervation of the nodal and working myocytes in sinauricular region of the heart were compared in intact dog and rat.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Biophysical modeling and experimental analysis of the dynamics of C. elegans body-wall muscle cells.
PLoS Comput Biol
January 2025
School of Mathematical Sciences, Shanghai Jiao Tong University, Shanghai, China.
This study combines experimental techniques and mathematical modeling to investigate the dynamics of C. elegans body-wall muscle cells. Specifically, by conducting voltage clamp and mutant experiments, we identify key ion channels, particularly the L-type voltage-gated calcium channel (EGL-19) and potassium channels (SHK-1, SLO-2), which are crucial for generating action potentials.
View Article and Find Full Text PDFCraniofacial development gives rise to the complex structures of the face and involves the interplay of diverse cell types. Despite its importance, our understanding of human-specific craniofacial developmental mechanisms and their genetic underpinnings remains limited. Here, we present a comprehensive single-nucleus RNA sequencing (snRNA-seq) atlas of human craniofacial development from craniofacial tissues of 24 embryos that span six key time points during the embryonic period (4-8 post-conception weeks).
View Article and Find Full Text PDFThe potential synergistic effect of combining doxorubicin with vorinostat in urothelial carcinoma therapy.
Heliyon
January 2025
Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi City, Taiwan.
Bladder cancer ranks as the 9th most common type of cancer worldwide. Approximately 70 % of bladder cancers are diagnosed as non-muscle invasive, and they are treated with transurethral resection followed by intravesical therapy. Doxorubicin is one of the effective cytotoxic drugs used in intravesical and systemic therapy, but its cardiotoxicity and nephrotoxicity limit therapeutic dosages.
View Article and Find Full Text PDFA novel uORF regulates folliculin to promote cell growth and lysosomal biogenesis during cardiac stress.
Sci Rep
January 2025
Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Heidelberg, Germany.
Pathological cardiac remodeling is a maladaptive response that leads to changes in the size, structure, and function of the heart. These changes occur due to an acute or chronic stress on the heart and involve a complex interplay of hemodynamic, neurohormonal and molecular factors. As a critical regulator of cell growth, protein synthesis and autophagy mechanistic target of rapamycin complex 1 (mTORC1) is an important mediator of pathological cardiac remodeling.
View Article and Find Full Text PDFSynaptotagmin-1 attenuates myocardial programmed necrosis and ischemia/reperfusion injury through the mitochondrial pathway.
Cell Death Dis
January 2025
Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, School of Basic Medicine, Shanxi Medical University, Taiyuan, China.
Programmed necrosis/necroptosis greatly contributes to the pathogenesis of cardiac disorders including myocardial infarction, ischemia/reperfusion (I/R) injury and heart failure. However, the fundamental mechanism underlying myocardial necroptosis, especially the mitochondria-dependent death pathway, is poorly understood. Synaptotagmin-1 (Syt1), a Ca sensor, is originally identified in nervous system and mediates synchronous neurotransmitter release.
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!