Spontaneous oscillatory activity is a general feature of developing neural networks. Early in postnatal development, spontaneous network-driven events, termed giant depolarizing potentials (GDPs), occur synchronously over the entire hippocampus. By performing simulation of hippocampal network with using physiology parameters of the neurons and its network from the present experiments and literature dates, we investigated the participation of the different components of network in the generation of GDPs. Comparing the results of the model and in vitro experiments we conclude that are necessary for the GDP generation involvement the activation of GABAergic, glutamatergic inputs and perhaps gap junction.
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Neurobiol Dis
January 2025
IDDRC, Jane and Terry Semel Institute for Neuroscience & Human Behavior, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, CA, USA.
There is a growing consensus that brain development in Huntington's disease (HD) is abnormal, leading to the idea that HD is not only a neurodegenerative but also a neurodevelopmental disorder. Indeed, structural and functional abnormalities have been observed during brain development in both humans and animal models of HD. However, a concurrent study of cortical and striatal development in a genetic model of HD is still lacking.
View Article and Find Full Text PDFThere is a growing consensus that brain development in Huntington's disease (HD) is abnormal, leading to the idea that HD is not only a neurodegenerative but also a neurodevelopmental disorder. Indeed, structural and functional abnormalities have been observed during brain development in both humans and animal models of HD. However, a concurrent study of cortical and striatal development in a genetic model of HD is still lacking.
View Article and Find Full Text PDFBiochem Biophys Res Commun
November 2024
Laboratory of Neurobiology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, 420015, Russia; Aix-Marseille University, INMED, INSERM, Marseille, 13273, France. Electronic address:
Giant Depolarizing Potentials (GDPs) and Early Sharp Waves (eSPWs) are the major patterns of neuronal network activity in the developing hippocampus of neonatal rodents in vitro and in vivo, respectively. Because of certain similarities in their electrographic traits, GDPs and eSPWs were originally considered as homologous patterns. Here, we compared electrographic features and current density profiles of field GDPs (fGDPs) and eSPWs using extracellular multisite silicon probe recordings from neonatal rat CA1 hippocampus.
View Article and Find Full Text PDFPostgrad Med
November 2024
Department of Medicine 'B', Zabludowicz Center for Autoimmune Diseases, Sheba Medical Center, Tel-Hashomer, Israel; affiliated with Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
Plant Physiol Biochem
October 2024
Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
-Action potential (AP) of excitable plant cells is an important signaling event that can differentially alter physicochemical and physiological processes in various parts of the same cell. In giant cells of characean algae, the AP propagation has minor effect on photosynthetic electron transport in areas with high activity of plasmalemmal H-pump but inhibits linear electron flow in regions featuring high passive H/OH conductance of the plasma membrane (PM). Uneven spatial distributions of local periplasmic and cytoplasmic pH facilitate the operation of distinct (CO-dependent and O-mediated) pathways of photoinduced electron flow, which presumably accounts for differential influence of AP on photosynthesis.
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