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Sensitive multicolor indicators for monitoring norepinephrine in vivo
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Journal Article
Sensitive multicolor indicators for monitoring norepinephrine in vivo
2023
Overview
Genetically encoded indicators engineered from G-protein-coupled receptors are important tools that enable high-resolution in vivo neuromodulator imaging. Here, we introduce a family of sensitive multicolor norepinephrine (NE) indicators, which includes nLightG (green) and nLightR (red). These tools report endogenous NE release in vitro, ex vivo and in vivo with improved sensitivity, ligand selectivity and kinetics, as well as a distinct pharmacological profile compared with previous state-of-the-art GRAB
NE
indicators. Using in vivo multisite fiber photometry recordings of nLightG, we could simultaneously monitor optogenetically evoked NE release in the mouse locus coeruleus and hippocampus. Two-photon imaging of nLightG revealed locomotion and reward-related NE transients in the dorsal CA1 area of the hippocampus. Thus, the sensitive NE indicators introduced here represent an important addition to the current repertoire of indicators and provide the means for a thorough investigation of the NE system.
Red and green genetically encoded indicators for norepinephrine have been developed and employed to monitor norepinephrine during locomotion and reward behavior in mice. The strategy used for generating these indicators also produced indicators for other neuromodulators.
Publisher
Nature Publishing Group US,Nature Publishing Group
Subject
