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Kainate receptors in the CA2 region of the hippocampus

Neural Regeneration Research 2023年第2期18卷 320-321页

作者： yuniesky andrade-talavera Antonio Rodríguez-Moreno Laboratorio de Neurociencia Celulary Plasticidad Departamento de FisiologíaAnatomía y Biología CelularUniversidad Pablo de OlavideSevillaSpain

The hippocampus is involved in important brain functions such as learning and memory,spatial navigation,fear processing,and social behavior(Dudek et al,2016).The most prominent areas of the hippocampus are typically denoted as the dentate gyrus and the three areas of the cornu ammonis(CA1,CA2,and CA3).Discovered by Lorente de Nó(1934),the CA2 region of the hippocampus is a relatively small area interposed between CA3 and CA1 that forms the nexus linking the input of the entorhinal cortex to the output of CA1(Chevaleyre and Siegelbaum,2010).

关键词： CA2 cortex linking

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Targeting galectin-3 to counteract spike-phase uncoupling of fast-spiking interneurons to gamma oscillations in Alzheimer’s disease

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Translational Neurodegeneration 2023年第1期12卷 801-823页

作者： Luis Enrique Arroyo-García Sara Bachiller Rocío Ruiz Antonio Boza-Serrano Antonio Rodríguez-Moreno Tomas Deierborg yuniesky andrade-talavera AndréFisahn Neuronal Oscillations Laboratory Division of NeurogeriatricsCenter for Alzheimer ResearchDepartment of NeurobiologyCare Sciences and SocietyKarolinska Institutet17164 SolnaSweden Experimental Neuroinflammation Laboratory Department of Experimental Medical ScienceLund UniversityBMC B1122184 LundSweden Clinical Unit of Infectious Diseases Microbiology and ParasitologyInstitute of Biomedicine of Seville(IBiS)Virgen del Rocío University HospitalCSICUniversity of SevilleSevilleSpain Department of Biochemistry and Molecular Biology University of SevilleCalle Profesor García González Nº241012 SevilleSpain Laboratory of Cellular Neuroscience and Plasticity Department of PhysiologyAnatomy and Cellular BiologyUniversidad Pablo de OlavideCarretera de Utrera Km-141013 SevilleSpain Department of Biosciences and Nutrition NeoKarolinska Institutet14183 HuddingeSweden

Background Alzheimer’s disease(AD)is a progressive multifaceted neurodegenerative disorder for which no disease-modifying treatment *** is central to the pathology progression,with evidence suggesting that microglia-released galectin-3(gal3)plays a pivotal role by amplifying neuroinflammation in ***,the possible involvement of gal3 in the disruption of neuronal network oscillations typical of AD remains *** Here,we investigated the functional implications of gal3 signaling on experimentally induced gamma oscillations ex vivo(20-80 Hz)by performing electrophysiological recordings in the hippocampal CA3 area of wild-type(WT)mice and of the 5×FAD mouse model of *** addition,the recorded slices from WT mice under acute gal3 application were analyzed with RT-qPCR to detect expression of some neuroinflammation-related genes,and amyloid-β(Aβ)plaque load was quantified by immunostaining in the CA3 area of 6-month-old 5×FAD mice with or without Gal3 knockout(KO).Results Gal3 application decreased gamma oscillation power and rhythmicity in an activity-dependent manner,which was accompanied by impairment of cellular dynamics in fast-spiking interneurons(FSNs)and pyramidal *** found that the gal3-induced disruption was mediated by the gal3 carbohydrate-recognition domain and prevented by the gal3 inhibitor TD139,which also prevented Aβ42-induced degradation of gamma ***-more,the 5×FAD mice lacking gal3(5×FAD-Gal3KO)exhibited WT-like gamma network dynamics and decreased Aβplaque *** We report for the first time that gal3 impairs neuronal network dynamics by spike-phase uncoupling of FSNs,inducing a network performance ***,our findings suggest gal3 inhibition as a potential therapeutic strategy to counteract the neuronal network instability typical of AD and other neurological disorders encompassing neuroinflammation and cognitive decline.

关键词： Galectin-3 Gamma oscillations Neuronal network dynamics Fast-spiking interneurons Alzheimer’s disease models Neuroinflammation TD139 Hippocampus

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