Engineered Illumination Devices for Optogenetic Control of Cellular Signaling Dynamics.
Engineered Illumination Devices for Optogenetic Control of Cellular Signaling Dynamics.
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DOI:
10.1016/j.celrep.2020.107737
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发表时间:
2020-06-09
期刊:
影响因子:
8.8
通讯作者:
Schaffer, David, V
中科院分区:
文献类型:
--
作者:
Repina, Nicole A.;McClave, Thomas;Johnson, Hunter J.;Bao, Xiaoping;Kane, Ravi S.;Schaffer, David, V
Spatially and temporally varying patterns of morphogen signals during development drive cell fate specification at the proper location and time. However, current in vitro methods typically do not allow for precise, dynamic spatiotemporal control of morphogen signaling and are thus insufficient to readily study how morphogen dynamics affect cell behavior. Here, we show that optogenetic Wnt/β-catenin pathway activation can be controlled at user-defined intensities, temporal sequences, and spatial patterns using engineered illumination devices for optogenetic photostimulation and light activation at variable amplitudes (LAVA). By patterning human embryonic stem cell (hESC) cultures with varying light intensities, LAVA devices enabled dose-responsive control of optoWnt activation and Brachyury expression. Furthermore, time-varying and spatially localized patterns of light revealed tissue patterning that models the embryonic presentation of Wnt signals in vitro. LAVA devices thus provide a low-cost, user-friendly method for high-throughput and spatiotemporal optogenetic control of cell signaling for applications in developmental and cell biology. With optogenetics, protein-protein interactions and cell signaling can be controlled with light. To allow user-defined illumination patterns to be projected onto cell cultures, Repina et al. designed programmable photostimulation devices called LAVA devices and use them to optogenetically induce patterns of Wnt signaling in human embryonic stem cells.
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