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Apelin/APJ system: a novel promising target for anti-oxidative stress in stroke.
Front Pharmacol
January 2025
Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
The apelin/APJ system has garnered increasing attention in recent years. In this review, we comprehensively discuss the physiological and pathological mechanisms of the apelin/APJ system in stroke. The apelin/APJ system is widely expressed in the central nervous system (CNS).
View Article and Find Full Text PDFK1 channels enable myelinated axons to transmit spikes reliably without spiking ectopically.
J Neurosci
January 2025
Neurosciences and Mental Health, The Hospital for Sick Children, Toronto, Ontario, Canada
Action potentials (spikes) are regenerated at each node of Ranvier during saltatory transmission along a myelinated axon. The high density of voltage-gated sodium channels required by nodes to reliably transmit spikes increases the risk of ectopic spike generation in the axon. Here we show that ectopic spiking is avoided because K1 channels prevent nodes from responding to slow depolarization; instead, axons respond selectively to rapid depolarization because K1 channels implement a high-pass filter.
View Article and Find Full Text PDFThe Shab family potassium channels are highly enriched at the presynaptic terminals of human neurons.
J Biol Chem
January 2025
Biochemistry & Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA; Molecular, Cellular & Integrated Neurosciences, Colorado State University, Fort Collins, CO 80523, USA; Cell & Molecular Biology, Colorado State University, Fort Collins, CO 80523, USA. Electronic address:
The Shab family voltage-gated K channels (i.e., Kv2.
View Article and Find Full Text PDFSub-cellular population imaging tools reveal stable apical dendrites in hippocampal area CA3.
Nat Commun
January 2025
Neuroscience Institute, New York University Langone Health, New York, NY, 10016, USA.
Apical and basal dendrites of pyramidal neurons receive anatomically and functionally distinct inputs, implying compartment-level functional diversity during behavior. To test this, we imaged in vivo calcium signals from soma, apical dendrites, and basal dendrites in mouse hippocampal CA3 pyramidal neurons during head-fixed navigation. To capture compartment-specific population dynamics, we developed computational tools to automatically segment dendrites and extract accurate fluorescence traces from densely labeled neurons.
View Article and Find Full Text PDFSubventricular Accumulation of Cu in the Aging Mouse Brain Does Not Associate with Anticipated Increases in Markers of Oxidative Stress.
ACS Chem Neurosci
January 2025
School of Molecular and Life Sciences, Faculty of Science and Engineering, Curtin University, Bentley, WA 6845, Australia.
Natural aging is associated with mild memory loss and cognitive decline, and age is the greatest risk factor for neurodegenerative diseases, such as Alzheimer's disease. There is substantial evidence that oxidative stress is a major contributor to both natural aging and neurodegenerative disease, and coincidently, levels of redox active metals such as Fe and Cu are known to be elevated later in life. Recently, a pronounced age-related increase in Cu content has been reported to occur in mice and rats around a vital regulatory brain region, the subventricular zone of lateral ventricles.
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