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PLoS Biol. 2015 May 7;13(5):e1002143. doi: 10.1371/journal.pbio.1002143. eCollection 2015 May.

Restoring the ON Switch in Blind Retinas: Opto-mGluR6, a Next-Generation, Cell-Tailored Optogenetic Tool.

Author information

1
Institute for Physiology, University of Bern, Bern, Switzerland; Institute for Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
2
Systems Neuroscience, Bernstein Fokus Neurotechnology and Johann-Friedrich-Blumenbach Institut für Zoologie und Anthropologie, Universität Göttingen, Von-Siebold-Str. 6, Göttingen, Germany.
3
Systems Neuroscience, Bernstein Fokus Neurotechnology and Johann-Friedrich-Blumenbach Institut für Zoologie und Anthropologie, Universität Göttingen, Von-Siebold-Str. 6, Göttingen, Germany; Sensory Collaborative Research Center 889, University of Göttingen, Göttingen, Germany.
4
Institute for Physiology, University of Bern, Bern, Switzerland.

Abstract

Photoreceptor degeneration is one of the most prevalent causes of blindness. Despite photoreceptor loss, the inner retina and central visual pathways remain intact over an extended time period, which has led to creative optogenetic approaches to restore light sensitivity in the surviving inner retina. The major drawbacks of all optogenetic tools recently developed and tested in mouse models are their low light sensitivity and lack of physiological compatibility. Here we introduce a next-generation optogenetic tool, Opto-mGluR6, designed for retinal ON-bipolar cells, which overcomes these limitations. We show that Opto-mGluR6, a chimeric protein consisting of the intracellular domains of the ON-bipolar cell-specific metabotropic glutamate receptor mGluR6 and the light-sensing domains of melanopsin, reliably recovers vision at the retinal, cortical, and behavioral levels under moderate daylight illumination.

PMID:
25950461
PMCID:
PMC4423780
DOI:
10.1371/journal.pbio.1002143
[Indexed for MEDLINE]
Free PMC Article

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