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The central nucleus of the amygdala (CeA) serves as a major output of this structure and plays a critical role in the expression of conditioned fear. By combining cell- and tissue-specific pharmacogenetic inhibition with functional magnetic resonance imaging (fMRI), we identified circuits downstream of CeA that control fear expression in mice. Selective(More)
We examined the effects of the chemokine fractalkine (CX3CL1) on EPSCs evoked by electrical stimulation of Schaffer collaterals in patch-clamped CA1 pyramidal neurons from rat hippocampal slices. Acute application of CX3CL1 caused a sustained reduction of EPSC amplitude, with partial recovery after washout. CX3CL1-induced EPSC depression is postsynaptic in(More)
Excitotoxicity is a cell death caused by excessive exposure to glutamate (Glu), contributing to neuronal degeneration in many acute and chronic CNS diseases. We explored the role of fractalkine/CX3CL1 on survival of hippocampal neurons exposed to excitotoxic doses of Glu. We found that: CX3CL1 reduces excitotoxicity when co-applied with Glu, through the(More)
We have examined how the chemokine fractalkine/CX(3)CL1 influences long-term potentiation (LTP) in CA1 mouse hippocampal slices. Field potentials (fEPSPs) were recorded upon electrical stimulation of Schaffer collaterals. It was found that application of CX(3)CL1 inhibits LTP when present during the critical induction period. LTP impairment (i) failed to(More)
This work reports the effect of chemokine fractalkine/CX3CL1, an endogenous small peptide highly expressed in the central nervous system, on evoked synaptic responses investigated in mouse CA1 stratum radiatum using an electrophysiological approach. We report that in acute mouse hippocampal slices, superfusion of CX3CL1 resulted in a reversible depression(More)
The activation of ion channels is crucial during cell movement, including glioblastoma cell invasion in the brain parenchyma. In this context, we describe for the first time the contribution of intermediate conductance Ca(2+)-activated K (IK(Ca)) channel activity in the chemotactic response of human glioblastoma cell lines, primary cultures, and freshly(More)
PURPOSE The chemokine fractalkine/CX3CL1 and its receptor CX3CR1 are widely expressed in the central nervous system (CNS). Recent evidence showed that CX3CL1 participates in inflammatory responses that are common features of CNS disorders, such as epilepsy. Mesial temporal lobe epilepsy (MTLE) is the prevalent form of focal epilepsy in adults, and(More)
Hippocampal neurons activated during encoding drive the recall of contextual fear memory. Little is known about how such ensembles emerge during acquisition and eventually form the cellular engram. Manipulating the activity of granule cells (GCs) of the dentate gyrus (DG), we reveal a mechanism of lateral inhibition that modulates the size of the cellular(More)
Miriam Sciaccaluga, Bernard Fioretti, Luigi Catacuzzeno, Francesca Pagani, Cristina Bertollini, Maria Rosito, Myriam Catalano, Giuseppina D’Alessandro, Antonio Santoro, Giampaolo Cantore, Davide Ragozzino, Emilia Castigli, Fabio Franciolini, and Cristina Limatola Istituto Pasteur-Fondazione Cenci Bolognetti and Department of Physiology and Pharmacology, and(More)
Neuronal chloride concentration ([Cl(-)](i)) is known to be dynamically modulated and alterations in Cl(-) homeostasis may occur in the brain at physiological and pathological conditions, being also likely involved in glioma-related seizures. However, the mechanism leading to changes in neuronal [Cl(-)](i) during glioma invasion are still unclear. To(More)