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Visual activity enhances neuronal excitability in thalamic relay neurons.
Sci Adv
January 2025
Aix-Marseille Université, INSERM, UNIS, Marseille, France.
Amblyopia, a highly prevalent loss of visual acuity, is classically thought to result from cortical plasticity. The dorsal lateral geniculate nucleus (dLGN) has long been held to act as a passive relay for visual information, but recent findings suggest a largely underestimated functional plasticity in the dLGN. However, the cellular mechanisms supporting this plasticity have not yet been explored.
View Article and Find Full Text PDFAMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases.
Cell Mol Neurobiol
January 2025
Laboratory of Neurobiology, Centro de Investigaciones Medico Sanitarias (CIMES), University of Malaga, Calle Marqués de Beccaria, 3, Campus Teatinos s/n, 29010, Malaga, Spain.
Tetrameric AMPA-type ionotropic glutamate receptors are primary transducers of fast excitatory synaptic transmission in the central nervous system, and their properties and abundance at the synaptic surface are crucial determinants of synaptic efficacy in neuronal communication across the brain. The induction of long-term potentiation (LTP) leads to the insertion of GluA1-containing AMPA receptors at the synaptic surface, whereas during long-term depression (LTD), these receptors are internalized into the cytoplasm of the spine. Disruptions in the trafficking of AMPA receptors to and from the synaptic surface attenuate both forms of synaptic plasticity.
View Article and Find Full Text PDFRegulation of nociception by long-term potentiation of inhibitory postsynaptic currents from insular cortical parvalbumin-immunopositive neurons to pyramidal neurons.
Pain
January 2025
Department of Pharmacology, Nihon University School of Dentistry, Tokyo, Japan.
The insular cortex (IC) processes various sensory information, including nociception, from the trigeminal region. Repetitive nociceptive inputs from the orofacial area induce plastic changes in the IC. Parvalbumin-immunopositive neurons (PVNs) project to excitatory neurons (pyramidal neurons [PNs]), whose inputs strongly suppress the activities of PNs.
View Article and Find Full Text PDFNeuronal Plasma Membranes as Supramolecular Assemblies for Biological Memory.
Langmuir
January 2025
Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, United States.
Biological memory is the ability to develop, retain, and retrieve information over time. Currently, it is widely accepted that memories are stored in synapses (i.e.
View Article and Find Full Text PDFInvolvement of ROS signal in aging and regulation of brain functions.
J Physiol Sci
December 2024
Department of Memory Neuroscience, Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan; Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi-cho, Sakyo-ku, Kyoto-city, Kyoto 606-8501, Japan. Electronic address:
Reactive oxygen species (ROS) are redox-signaling molecules involved in aging and lifestyle-related diseases. In the brain, in addition to the production of ROS as byproducts of metabolism, expression of ROS synthases has recently been demonstrated, suggesting possible involvement of ROS in various brain functions. This review highlights current knowledge on the relationship between ROS and brain functions, including their contribution to age-related decline in synaptic plasticity and cognitive function.
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