Results 71 to 80 of about 17,120 (211)

Intramuscular pathways of maladaptation in overtraining syndrome

The Journal of Physiology, EarlyView.
Abstract figure legend The transition from adaptive overreaching to maladaptive overtraining and mechanisms through which excessive training load can lead to performance decline. Four interconnected pathophysiological domains are highlighted: neural fatigue, involving both central and peripheral components such as altered sensory feedback and reflex ...
Emily Shorter, Oscar Horwath, Sabrina Tzivia Barsky, Ferdinand von Walden, Johanna T. Lanner   +4 more
wiley   +1 more source

Mitochondrial oxidative stress, calcium and dynamics in cardiac ischaemia‐reperfusion injury

The Journal of Physiology, EarlyView.
Abstract figure legend Heart attack causes ischaemia–reperfusion injury in cardiomyocytes. Mitochondria generate reactive oxygen species (ROS), leading to oxidative stress. High levels of mitochondrial calcium (Ca2+) activate the mitochondrial permeability transition pore (mPTP), and excess ROS levels can lower the Ca2+ required to activate the mPTP ...
Emily Rozich, Ulas Ozkurede, Shanmugasundaram Pakkiriswami, Ryan Gemilere, Samira M. Azarin, Julia C. Liu   +5 more
wiley   +1 more source

Proestrus Differentially Regulates Expression of Ion Channel and Calcium Homeostasis Genes in GnRH Neurons of Mice

Frontiers in Molecular Neuroscience, 2019
In proestrus, the changing gonadal hormone milieu alters the physiological properties of GnRH neurons and contributes to the development of the GnRH surge.
Csaba Vastagh, Norbert Solymosi, Imre Farkas, Zsolt Liposits, Zsolt Liposits   +4 more
doaj   +1 more source

Ryanodine receptor 1-related disorders: an historical perspective and proposal for a unified nomenclature

Skeletal Muscle, 2020
The RYR1 gene, which encodes the sarcoplasmic reticulum calcium release channel or type 1 ryanodine receptor (RyR1) of skeletal muscle, was sequenced in 1988 and RYR1 variations that impair calcium homeostasis and increase susceptibility to malignant ...
Tokunbor A. Lawal, Joshua J. Todd, Jessica W. Witherspoon, Carsten G. Bönnemann, James J. Dowling, Susan L. Hamilton, Katherine G. Meilleur, Robert T. Dirksen   +7 more
doaj   +1 more source

Mechanisms underlying local Ca2+ signalling differences between right and left atrial myocytes at normal and increased frequencies

The Journal of Physiology, EarlyView.
Abstract figure legend Left atrial myocytes have TAT‐associated faster Ca2+ release but are more prone to maladaptation at higher frequencies due to weaker peripheral SR Ca2+ uptake and smaller trigger Ca2+ current. Abstract Changes in heart rate affect Ca2+ signalling and contractility in ventricular muscle, but the effects on atrial Ca2+ signalling ...
Joon‐Chul Kim, Hieu Trong Huynh, Phuong Kim Luong, Tran Nguyet Trinh, Yixuan Wu, Eleonora Grandi, Sun‐Hee Woo   +6 more
wiley   +1 more source

Characterization of PDGF-Induced Subcellular Calcium Regulation through Calcium Channels in Airway Smooth Muscle Cells by FRET Biosensors

Biosensors
The homeostasis of cellular calcium is fundamental for many physiological processes, while the calcium levels remain inhomogeneous within cells. During the onset of asthma, epithelial and inflammatory cells secrete platelet-derived growth factor (PDGF ...
Mingxing Ouyang, Binqian Zhou, Chunmei Li, Linhong Deng   +3 more
doaj   +1 more source

A Rare Case of Severe Congenital RYR1-Associated Myopathy

Case Reports in Genetics, 2018
Congenital myopathies are a group of rare inherited diseases, defined by hypotonia and muscle weakness. We report clinical and genetic characteristics of a male preterm newborn, whose phenotype was characterized by severe hypotonia and hyporeactivity ...
Nicola Laforgia, Manuela Capozza, Lucrezia De Cosmo, Antonio Di Mauro, Maria Elisabetta Baldassarre, Francesca Mercadante, Anna Laura Torella, Vincenzo Nigro, Nicoletta Resta   +8 more
doaj   +1 more source

Catecholaminergic polymorphic ventricular tachycardia–linked ryanodine receptor variants exhibit domain‐specific calcium leak and calmodulin affinity properties

The Journal of Physiology, EarlyView.
Abstract figure legend Catecholaminergic polymorphic ventricular tachycardia (CPVT) variants in N terminal (NTD) and central domain (CD) but not pore domain induce a pathological RyR2 conformational shift upon protein kinase A (PKA) phosphorylation, similar to that seen in heart failure (HF), calcium/calmodulin‐dependent protein kinase II (CaMKII ...
Hitoshi Uchinoumi, Xiaoqiong Dong, Ivanita Stefanon, Yi Yang, Eduardo Hertel Ribeiro, Bengt Svensson, Xander H. T. Wehrens, Takeshi Yamamoto, Razvan L. Cornea, Robyn T. Rebbeck, Masafumi Yano, Donald M. Bers   +11 more
wiley   +1 more source

Characterization of Forskolin-Induced Ca2+ Signals in Rat Olfactory Receptor Neurons

Journal of Pharmacological Sciences, 2005
Forskolin-induced Ca2+ signals were examined in isolated rat olfactory receptor neurons (ORNs) using a Ca2+ indicator, fura-2. In the soma of the ORNs, forskolin caused an increase in the intracellular Ca2+ concentration ([Ca2+]i) that was enhanced by a ...
Ken-ichi Otsuguro, Shree Hari Gautam, Shigeo Ito, Yoshiaki Habara, Toshiyuki Saito   +4 more
doaj   +1 more source

Exploiting Peptidomimetics to Synthesize Compounds That Activate Ryanodine Receptor Calcium Release Channels

ChemMedChem, 2018
AbstractRyanodine receptor (RyR) Ca2+‐release channels are essential for contraction in skeletal and cardiac muscle and are prime targets for modification of contraction in disorders that affect either the skeletal or heart musculature. We designed and synthesized a number of compounds with structures based on a naturally occurring peptide (A peptides)
Ken Robinson, Christopher J. Easton, Angela F. Dulhunty, Marco G. Casarotto   +3 more
openaire   +4 more sources