Abstract:
:In recent years several evidence demonstrated that some features of hippocampal biology, like neurogenesis, synaptic transmission, learning, and memory performances are deeply modulated by social, motor, and sensorial experiences. Fractalkine/CX(3)CL1 is a transmembrane chemokine abundantly expressed in the brain by neurons, where it modulates glutamatergic transmission and long-term plasticity processes regulating the intercellular communication between glia and neurons, being its specific receptor CX(3)CR1 expressed by microglia. In this paper we investigated the role of CX(3)CL1/CX(3)CR1 signaling on experience-dependent hippocampal plasticity processes. At this aim wt and CX(3)CR1(GFP/GFP) mice were exposed to long-lasting-enriched environment (EE) and the effects on hippocampal functions were studied by electrophysiological recordings of long-term potentiation of synaptic activity, behavioral tests of learning and memory in the Morris water maze paradigm and analysis of neurogenesis in the subgranular zone of the dentate gyrus (DG). We found that CX(3)CR1 deficiency increases hippocampal plasticity and spatial memory, blunting the potentiating effects of EE. In contrast, exposure to EE increased the number and migration of neural progenitors in the DG of both wt and CX(3)CR1(GFP/GFP) mice. These data indicate that CX(3)CL1/CX(3)CR1-mediated signaling is crucial for a normal experience-dependent modulation of hippocampal functions.
journal_name
Front Cell Neuroscijournal_title
Frontiers in cellular neuroscienceauthors
Maggi L,Scianni M,Branchi I,D'Andrea I,Lauro C,Limatola Cdoi
10.3389/fncel.2011.00022subject
Has Abstractpub_date
2011-10-19 00:00:00pages
22issn
1662-5102journal_volume
5pub_type
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