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          Institute: MPI für medizinische Forschung     Collection: Max-Planck-Forschungsgruppe Neurophysiologie des Verhaltens (Andreas T. Schaefer)     Display Documents

ID: 546015.0, MPI für medizinische Forschung / Max-Planck-Forschungsgruppe Neurophysiologie des Verhaltens (Andreas T. Schaefer)
Optical recording of neuronal activity with a genetically−encoded calcium indicator in anesthetized and freely moving mice
Translation of Title:Optical recording of neuronal activity with a genetically−encoded calcium indicator in anesthetized and freely moving mice
Authors:Lütcke, Henry; Murayama, Masanori; Hahn, Thomas; Margolis, David J.; Astori, Simone; Meyer zum Alten Borgloh, Stephan; Göbel, Werner; Yang, Ying; Tang, Wannan; Kügler, Sebastian; Sprengel, Rolf; Nagai, Takeharu; Miyawaki, Atsushi; Larkum, Matthew E.; Helmchen, Fritjof; Hasan, Mazahir T.
Date of Publication (YYYY-MM-DD):2010-04-29
Title of Journal:Front. Neural Circuits
Journal Abbrev.:Front. Neural Circuits
Start Page:1
End Page:12
Sequence Number of Article:9
Review Status:Peer-review
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Fluorescent calcium (Ca(2+)) indicator proteins (FCIPs) are promising tools for functional imaging of cellular activity in living animals. However, they have still not reached their full potential for in vivo imaging of neuronal activity due to limitations in expression levels, dynamic range, and sensitivity for reporting action potentials. Here, we report that viral expression of the ratiometric Ca(2+) sensor yellow cameleon 3.60 (YC3.60) in pyramidal neurons of mouse barrel cortex enables in vivo measurement of neuronal activity with high dynamic range and sensitivity across multiple spatial scales. By combining juxtacellular recordings and two−photon imaging in vitro and in vivo, we demonstrate that YC3.60 can resolve single action potential (AP)−evoked Ca(2+) transients and reliably reports bursts of APs with negligible saturation. Spontaneous and whisker−evoked Ca(2+) transients were detected in individual apical dendrites and somata as well as in local neuronal populations. Moreover, bulk measurements using wide−field imaging or fiber−optics revealed sensory−evoked YC3.60 signals in large areas of the barrel field. Fiber−optic recordings in particular enabled measurements in awake, freely moving mice and revealed complex Ca(2+) dynamics, possibly reflecting different behavior−related brain states. Viral expression of YC3.60 − in combination with various optical techniques − thus opens a multitude of opportunities for functional studies of the neural basis of animal behavior, from dendrites to the levels of local and large−scale neuronal populations.
Free Keywords:calcium, yellow cameleon, neocortex, two−photon microscopy, adeno−associated virus, barrel cortex
Last Change of the Resource (YYYY-MM-DD):--
External Publication Status:published
Document Type:Article
Communicated by:Wulf Kaiser
Affiliations:MPI für medizinische Forschung/Abteilung Zellphysiologie
MPI für medizinische Forschung/Abteilung Molekulare Neurobiologie
MPI für medizinische Forschung/Nachwuchsgruppe Neurophysiologie des Verhaltens
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