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Sensitive red protein calcium indicators for imaging neural activity.

Authors :
Dana, Hod
Mohar, Boaz
Yi Sun
Narayan, Sujatha
Gordus, Andrew
Hasseman, Jeremy P.
Tsegaye, Getahun
Holt, Graham T.
Hu, Amy
Walpita, Deepika
Patel, Ronak
Macklin, John J.
Bargmann, Cornelia I.
Ahrens, Misha B.
Schreiter, Eric R.
Jayaraman, Vivek
Looger, Loren L.
Svoboda, Karel
Kim, Douglas S.
Source :
eLife. 2016, p1-24. 24p.
Publication Year :
2016

Abstract

Genetically encoded calcium indicators (GECIs) allow measurement of activity in large populations of neurons and in small neuronal compartments, over times of milliseconds to months. Although GFP-based GECIs are widely used for in vivo neurophysiology, GECIs with red-shifted excitation and emission spectra have advantages for in vivo imaging because of reduced scattering and absorption in tissue, and a consequent reduction in phototoxicity. However, current red GECIs are inferior to the state-of-the-art GFP-based GCaMP6 indicators for detecting and quantifying neural activity. Here we present improved red GECIs based on mRuby (jRCaMP1a, b) and mApple (jRGECO1a), with sensitivity comparable to GCaMP6. We characterized the performance of the new red GECIs in cultured neurons and in mouse, Drosophila, zebrafish and C. elegans in vivo. Red GECIs facilitate deep-tissue imaging, dual-color imaging together with GFP-based reporters, and the use of optogenetics in combination with calcium imaging. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
2050084X
Database :
Academic Search Index
Journal :
eLife
Publication Type :
Academic Journal
Accession number :
120849625
Full Text :
https://doi.org/10.7554/eLife.12727