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In Bioluminescent Optogenetics (BL-OG) a biological, rather than a physical, light source is used to activate light-sensing opsins, such as channelrhodopsins or pumps. This is commonly achieved by utilizing a luminopsin (LMO), a fusion protein of a light-emitting luciferase tethered to a light-sensing opsin. Light of the wavelength matching the activation peak of the opsin is emitted by the luciferase upon application of its small molecule luciferin, resulting in activation of the fused opsin and subsequent effects on membrane potential. Using optimized protocols for culturing, transforming, and testing primary neurons in multi electrode arrays, we systematically defined parameters under which changes in neuronal activity are specific to bioluminescent activation of opsins, rather than due to off-target effects of either the luciferin or its solvent on neurons directly, or on opsins directly. We further tested if there is a direct effect of bioluminescence on neurons. Critical for assuring specific BL-OG effects are testing the concentration and formulation of the luciferin against proper controls, including testing effects of vehicle on LMO expressing and of luciferin on nonLMO expressing targets.
Pubmed ID: 30152529 RIS Download
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View all literature mentionsCommercial data acquisition and analysis software that forms a data acquisition system for measuring extracellular activities of excitable cells in vitro and in vivo. It has been developed especially for use with the data acquisition systems from Multi Channel Systems MCS, but the software can also be used with other experimental setups.
View all literature mentionsRattus norvegicus with name HotHsd:SD from RGD.
View all literature mentionsIn vivo imaging software which facilitates workflow for in vivo optical, X-ray and microCT image acquisition, analysis and data organization.
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