Steun ons werk
Decorative header background

Spontaneous Activity Drives Local Synaptic Plasticity In Vivo

Onderzoeksgroep Lohmann
Publicatiejaar 2015
Gepubliceerd in Neuron
Auteur(s) C. Lohmann ,
De volgorde van auteurs kan afwijken van de originele publicatie door een tijdelijk technisch probleem.

Spontaneous activity fine-tunes neuronal connections in the developing brain. To explore the underlying synaptic plasticity mechanisms, we monitored naturally occurring changes in spontaneous activity at individual synapses with whole-cell patch-clamp recordings and simultaneous calcium imaging in the mouse visual cortex in vivo. Analyzing activity changes across large populations of synapses revealed a simple and efficient local plasticity rule: synapses that exhibit low synchronicity with nearby neighbors (<12 μm) become depressed in their transmission frequency. Asynchronous electrical stimulation of individual synapses in hippocampal slices showed that this is due to a decrease in synaptic transmission efficiency. Accordingly, experimentally increasing local synchronicity, by stimulating synapses in response to spontaneous activity at neighboring synapses, stabilized synaptic transmission. Finally, blockade of the high-affinity proBDNF receptor p75(NTR) prevented the depression of asynchronously stimulated synapses. Thus, spontaneous activity drives local synaptic plasticity at individual synapses in an “out-of-sync, lose-your-link” fashion through proBDNF/p75(NTR) signaling to refine neuronal connectivity. VIDEO ABSTRACT.

Steun ons werk

De Stichting Vrienden van het Herseninstituut ondersteunt baanbrekend hersenonderzoek. U kunt ons daarbij helpen.

Steun ons werk