Author Topic: Thermogenetic neurostimulation with single-cell resolution  (Read 25 times)

Offline Chip (OP)

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Thermogenetic neurostimulation with single-cell resolution
« on: July 04, 2019, 10:22:14 PM »
source: https://europepmc.org/abstract/med/28530239

Thermogenetic neurostimulation with single-cell resolution

22 May 2017

System enables identification of digital entities

Abstract

Thermogenetics is a promising innovative neurostimulation technique, which enables robust activation of neurons using thermosensitive transient receptor potential (TRP) cation channels.

Broader application of this approach in neuroscience is, however, hindered by a limited variety of suitable ion channels, and by low spatial and temporal resolution of neuronal activation when TRP channels are activated by ambient temperature variations or chemical agonists.

Here, we demonstrate rapid, robust and reproducible repeated activation of snake TRPA1 channels heterologously expressed in non-neuronal cells, mouse neurons and zebrafish neurons in vivo by infrared (IR) laser radiation.

A fibre-optic probe that integrates a nitrogen-vacancy (NV) diamond quantum sensor with optical and microwave waveguide delivery enables thermometry with single-cell resolution, allowing neurons to be activated by exceptionally mild heating, thus preventing the damaging effects of excessive heat.

The neuronal responses to the activation by IR laser radiation are fully characterized using Ca2+ imaging and electrophysiology, providing, for the first time, a complete framework for a thermogenetic manipulation of individual neurons using IR light.
« Last Edit: July 05, 2019, 05:48:41 AM by Chip »
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