美国爱因斯坦医学院Vladislav V. Verkhusha课题组开发出一种可用于体内成像的近红外遗传编码钙指示剂。这一研究成果于2020年10月26日在线发表在国际学术期刊《自然—生物技术》上。
Title: A near-infrared genetically encoded calcium indicator for in vivo imaging
Author: Anton A. Shemetov, Mikhail V. Monakhov, Qinrong Zhang, Jose Ernesto Canton-Josh, Manish Kumar, Maomao Chen, Mikhail E. Matlashov, Xuan Li, Wei Yang, Liming Nie, Daria M. Shcherbakova, Yevgenia Kozorovitskiy, Junjie Yao, Na Ji, Vladislav V. Verkhusha
Issue&Volume: 2020-10-26
Abstract: While calcium imaging has become a mainstay of modern neuroscience, the spectral properties of current fluorescent calcium indicators limit deep-tissue imaging as well as simultaneous use with other probes. Using two monomeric near-infrared (NIR) fluorescent proteins (FPs), we engineered an NIR Förster resonance energy transfer (FRET)-based genetically encoded calcium indicator (iGECI). iGECI exhibits high levels of brightness and photostability and an increase up to 600% in the fluorescence response to calcium. In dissociated neurons, iGECI detects spontaneous neuronal activity and electrically and optogenetically induced firing. We validated the performance of iGECI up to a depth of almost 400 µm in acute brain slices using one-photon light-sheet imaging. Applying hybrid photoacoustic and fluorescence microscopy, we simultaneously monitored neuronal and hemodynamic activities in the mouse brain through an intact skull, with resolutions of ~3 μm (lateral) and ~25–50 μm (axial). Using two-photon imaging, we detected evoked and spontaneous neuronal activity in the mouse visual cortex, with fluorescence changes of up to 25%. iGECI allows biosensors and optogenetic actuators to be multiplexed without spectral crosstalk. A near-infrared fluorescent calcium indicator can be combined with other optogenetic tools in vivo without spectral crosstalk.
DOI: 10.1038/s41587-020-0710-1
Source: https://www.nature.com/articles/s41587-020-0710-1
Nature Biotechnology:《自然—生物技术》,创刊于1996年。隶属于施普林格·自然出版集团,最新IF:68.164
官方网址:https://www.nature.com/nbt/
投稿链接:https://mts-nbt.nature.com/cgi-bin/main.plex
本期文章:《自然—生物技术》:Online/在线发表