Single-Cell Optogenetic Control of Calcium Signaling with a High-Density Micro-LED Array.

ABSTRACT: Precise optogenetic control, ideally down to single cells in dense cell populations, is essential in understanding the heterogeneity of cell networks. Devices with such capability, if built in a chip scale, will advance optogenetic studies at cellular levels in a variety of experimental settings. Here we demonstrate optogenetic control of intracellular Ca2+ dynamics at the single cell level using a 16-μm pitched micro-light emitting diode (LED) array that features high brightness, small spot size, fast response, and low voltage operation. Individual LED pixels are able to reliably trigger intracellular Ca2+ transients, confirmed by fluorescence microscopy and control experiments and cross-checked by two genetically coded Ca2+ indicators. Importantly, our array can optogenetically address i

SUBMITTER: Mao D 

PROVIDER: S-EPMC6889635 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature