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The NMDAR-BK channelosomes as regulators of synaptic plasticity.
Biochem Soc Trans
January 2025
Departamento de Ciencias Médicas Básicas, Facultad de Ciencias de la Salud-sección Medicina, Universidad de La Laguna, Tenerife, ES-38071, Spain.
Large conductance voltage- and calcium-activated potassium channels (BK channels) are extensively found throughout the central nervous system and play a crucial role in various neuronal functions. These channels are activated by a combination of cell membrane depolarisation and an increase in intracellular calcium concentration, provided by calcium sources located close to BK. In 2001, Isaacson and Murphy first demonstrated the coupling of BK channels with N-methyl-D-aspartate receptors (NMDAR) in olfactory bulb neurons.
View Article and Find Full Text PDFFrom Atrial Small-conductance Calcium-activated Potassium Channels to New Antiarrhythmics.
Eur Cardiol
December 2024
Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen Copenhagen, Denmark.
Despite significant advances in its management, AF remains a major healthcare burden affecting millions of individuals. Rhythm control with antiarrhythmic drugs or catheter ablation has been shown to improve symptoms and outcomes in AF patients, but current treatment options have limited efficacy and/or significant side-effects. Novel mechanism-based approaches could potentially be more effective, enabling improved therapeutic strategies for managing AF.
View Article and Find Full Text PDFIonic Mechanisms Involved in β3-Adrenoceptor-Mediated Augmentation of GABAergic Transmission Onto Pyramidal Neurons in Prefrontal Cortex.
J Neurochem
January 2025
School of Life Science, Nanchang University, Nanchang, China.
Activation of the brain-penetrant beta3-adrenergic receptor (Adrb3) is implicated in the treatment of depressive disorders. Enhancing GABAergic inputs from interneurons onto pyramidal cells of prefrontal cortex (PFC) represents a strategy for antidepressant therapies. Here, we probed the effects of the activation of Adrb3 on GABAergic transmission onto pyramidal neurons in the PFC using in vitro electrophysiology.
View Article and Find Full Text PDFGABA Receptor Modulation of Membrane Excitability in Human Pluripotent Stem Cell-Derived Sensory Neurons by Baclofen and α-Conotoxin Vc1.1.
J Neurochem
January 2025
Molecular Horizons, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, New South Wales, Australia.
GABA receptor (GABAR) activation is known to alleviate pain by reducing neuronal excitability, primarily through inhibition of high voltage-activated (HVA) calcium (Ca2.2) channels and potentiating G protein-coupled inwardly rectifying potassium (GIRK) channels. Although the analgesic properties of small molecules and peptides have been primarily tested on isolated murine dorsal root ganglion (DRG) neurons, emerging strategies to develop, study, and characterise human pluripotent stem cell (hPSC)-derived sensory neurons present a promising alternative.
View Article and Find Full Text PDFThe roles of mitochondria in global and local intracellular calcium signalling.
Nat Rev Mol Cell Biol
January 2025
MitoCare Center, Department of Pathology and Genomic Medicine, Thomas Jefferson University, Philadelphia, PA, USA.
Activation of Ca channels in Ca stores in organelles and the plasma membrane generates cytoplasmic calcium ([Ca]) signals that control almost every aspect of cell function, including metabolism, vesicle fusion and contraction. Mitochondria have a high capacity for Ca uptake and chelation, alongside efficient Ca release mechanisms. Still, mitochondria do not store Ca in a prolonged manner under physiological conditions and lack the capacity to generate global [Ca] signals.
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