Near-infrared deep brain stimulation via upconversion nanoparticle–mediated optogenetics

Abstract

Stimulating deep inside the brain Noninvasive deep brain stimulation is an important goal in neuroscience and neuroengineering. Optogenetics normally requires the use of a blue laser inserted into the brain. Chen et al. used specialized nanoparticles that can upconvert near-infrared light from outside the brain into the local emission of blue light (see the Perspective by Feliu et al. ). They injected these nanoparticles into the ventral tegmental area of the mouse brain and activated channelrhodopsin expressed in dopaminergic neurons with near-infrared light generated outside the skull at a distance of several millimeters. This technique allowed distant near-infrared light to evoke fast increases in dopamine release. The method was also used successfully to evoke fear memories in the dentate gyrus during fear conditioning. Science , this issue p. 679 ; see also p. 633

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Affiliated Institutions

• Institute of Materials Research and Engineering SG
• Johns Hopkins Medicine US
• Johns Hopkins University US
• Agency for Science, Technology and Research SG
• The University of Tokyo JP
• Tokyo University of the Arts JP
• National University of Singapore SG
• Keio University JP
• RIKEN Center for Brain Science JP

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