Imaging different cell populations in the mouse olfactory bulb using the genetically encoded voltage indicator ArcLight.

Imaging different cell populations in the mouse olfactory bulb using the genetically encoded voltage indicator ArcLight.
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DOI:
10.1117/1.nph.11.3.033402
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发表时间:
2024-07
期刊:
影响因子:
5.3
通讯作者:
--
中科院分区:
医学2区
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--
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基因编码电压指示器 (GEVI) 是基于蛋白质的光学传感器,可以对基因定义的神经元群体进行测量。尽管由于膜表达差和信噪比低,使用早期 GEVI 在哺乳动物大脑中进行体内成像很困难,但更新且更灵敏的 GEVI 已开始使其可用于回答神经科学中的基本问题。我们讨论了使用 GEVI 和基因编码的钙指示剂进行成像的原理,这两种工具都是神经元活动体内成像的有用工具,并回顾了导致 GEVI 改进的一些最新机制进展。我们概述了小鼠嗅球 (OB),并讨论了最近使用 GEVI ArcLight 使用宽场和双光子显微镜研究嗅球内不同细胞类型的研究。特别强调使用 GEVI 开始研究 OB 中浓度编码的原理、如何解释体内大脑中群体测量的光学信号,以及推动该领域向前发展的未来发展。
Genetically encoded voltage indicators (GEVIs) are protein-based optical sensors that allow for measurements from genetically defined populations of neurons. Although in vivo imaging in the mammalian brain with early generation GEVIs was difficult due to poor membrane expression and low signal-to-noise ratio, newer and more sensitive GEVIs have begun to make them useful for answering fundamental questions in neuroscience. We discuss principles of imaging using GEVIs and genetically encoded calcium indicators, both useful tools for in vivo imaging of neuronal activity, and review some of the recent mechanistic advances that have led to GEVI improvements. We provide an overview of the mouse olfactory bulb (OB) and discuss recent studies using the GEVI ArcLight to study different cell types within the bulb using both widefield and two-photon microscopy. Specific emphasis is placed on using GEVIs to begin to study the principles of concentration coding in the OB, how to interpret the optical signals from population measurements in the in vivo brain, and future developments that will push the field forward.
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