Material extracted and partially purified from human cerebrospinal fluid (CSF) is capable of: a, inhibiting [3H]ouabain binding to rat brain synaptosomes; b, inhibiting the activity of purified pig kidney Na+,K+-ATPase; and c, inhibiting ouabain sensitive induced 86Rb influx to tissue cultured fibroblasts. These results demonstrate the existence of an 'ouabain like' compound (OLC) in human CSF, and are consistent with the hypothesis of the function of this compound as a neuromodulator.
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http://dx.doi.org/10.1016/0006-8993(85)90297-5 | DOI Listing |
Neurochem Int
December 2024
Biochemistry Graduate Program, Federal University of Pampa, Uruguaiana, RS, Brazil; Physical Education Undergraduation, Federal University of Pampa, Uruguaiana, RS, Brazil. Electronic address:
Bipolar disorder (BD) is a central nervous system condition that is typified by fluctuations in mood, oscillating between depressive and manic, and/or hypomanic episodes. The objective of this study was to test the hypothesis that strength training may act as a potent protector against behavioral and neurochemical changes induced by BD. A strength training protocol was performed with adult male Wistar rats, and seven days following the conclusion of training, a single ouabain injection was administered.
View Article and Find Full Text PDFJ Neurophysiol
January 2025
Department of Biology, Queen's University, Kingston, Ontario, Canada.
Spreading depolarization (SD) temporarily shuts down neural processing in mammals and insects. Age is a critical factor for predicting the consequences of SD in humans. We investigated the effect of aging in an insect model of SD and explored the contribution of oxidative stress.
View Article and Find Full Text PDFJ Neurophysiol
November 2024
Department of Biology, Queen's University, Kingston, Ontario, Canada.
Spreading depolarization (SD) describes the near-complete depolarization of central nervous system (CNS) neural cells as a consequence of chemical, electrical, or metabolic perturbations. It is well established as the central mechanism underlying insect coma and various mammalian neurological dysfunctions. Despite significant progress in our understanding, the question remains: which cation channel, if any, generates SD in the CNS? Previously, we speculated that the sodium-potassium ATPase (NKA) might function as a large-conductance ion channel to initiate SD in insects, potentially mediated by a palytoxin (PLTX)-like endogenous activator.
View Article and Find Full Text PDFCancer Med
September 2024
Department of Pharmacy, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, China.
Background And Aims: Cardiac glycosides (CGs), traditionally used for heart failure, have shown potential as anti-cancer agents. This study aims to explore their multifaceted mechanisms in cancer cell biology using proteome integral solubility alteration (PISA), focusing on the interaction with key proteins implicated in cellular metabolism and mitochondrial function.
Methods: We conducted lysate-based and intact-cell PISA assays on cancer cells treated with CGs (Digoxin, Digitoxin, Ouabain) to analyze protein solubility changes.
Sci Rep
July 2024
Department of Anatomy, Physiology and Genetics, Uniformed Services University School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, 20814, USA.
SARS-CoV-2-contributes to sickness and death in COVID-19 patients partly by inducing a hyper-proinflammatory immune response in the host airway. This hyper-proinflammatory state involves activation of signaling by NFκB, and unexpectedly, ENaC, the epithelial sodium channel. Post-infection inflammation may also contribute to "Long COVID"/PASC.
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