斯坦福大学Mark J. Schnitzer小组宣布他们的最新研究揭示了哺乳动物多神经元类高频电压动态成像。这一研究成果发表在2025年7月16日出版的国际学术期刊《细胞》上。
小组描述了两种互补的TEMPO（光学跨膜电测量）电压传感技术，可捕获高达~100 Hz的神经振荡。光纤TEMPO的灵敏度比先前的光度电压传感高10倍，允许更长的记录，并在自由移动的小鼠中监测每个光纤探针的两个神经元类别。有了它，研究组发现了交叉频率耦合的θ和γ范围振荡，并表征了海马波纹和视觉皮层处理过程中的兴奋-抑制神经动力学。TEMPO介观镜在约8毫米宽的视场内成像头部固定动物的两类细胞的电压活动。在清醒的小鼠中，它显示了感觉诱发的兴奋抑制性神经相互作用和视觉皮层的伽玛波和3-7赫兹波的传播以及海马θ波和β波的双向传播方向。这些技术在健康和患病大脑中广泛应用于探测不同的振荡和神经元类型的相互作用。
研究人员表示，荧光基因编码电压指示器报告目标细胞类型的跨膜电位。然而，电压成像仪器缺乏跟踪神经群中自发或诱发高频电压振荡的灵敏度。
附：英文原文
Title: Imaging high-frequency voltage dynamics in multiple neuron classes of behaving mammals
Author: Simon Haziza, Radosaw Chrapkiewicz, Yanping Zhang, Vasily Kruzhilin, Jane Li, Jizhou Li, Geoffroy Delamare, Rachel Swanson, Gyrgy Buzsáki, Madhuvanthi Kannan, Ganesh Vasan, Michael Z. Lin, Hongkui Zeng, Tanya L. Daigle, Mark J. Schnitzer
Issue&Volume: 2025-07-16
Abstract: Fluorescent genetically encoded voltage indicators report transmembrane potentials of targeted cell types. However, voltage-imaging instrumentation has lacked the sensitivity to track spontaneous or evoked high-frequency voltage oscillations in neural populations. Here, we describe two complementary TEMPO (transmembrane electrical measurements performed optically) voltage-sensing technologies that capture neural oscillations up to ～100 Hz. Fiber-optic TEMPO achieves ～10-fold greater sensitivity than prior photometric voltage sensing, allows hour-long recordings, and monitors two neuron classes per fiber-optic probe in freely moving mice. With it, we uncovered cross-frequency-coupled theta- and gamma-range oscillations and characterized excitatory-inhibitory neural dynamics during hippocampal ripples and visual cortical processing. The TEMPO mesoscope images voltage activity in two cell classes across an ～8-mm-wide field of view in head-fixed animals. In awake mice, it revealed sensory-evoked excitatory-inhibitory neural interactions and traveling gamma and 3–7 Hz waves in visual cortex and bidirectional propagation directions for both hippocampal theta and beta waves. These technologies have widespread applications probing diverse oscillations and neuron-type interactions in healthy and diseased brains.
DOI: 10.1016/j.cell.2025.06.028
Source: https://www.cell.com/cell/abstract/S0092-8674(25)00730-5