RuBi-Glutamate: Two-Photon and Visible-Light Photoactivation of Neurons and Dendritic spines.

RuBi-Glutamate: Two-Photon and Visible-Light Photoactivation of Neurons and Dendritic spines.
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DOI:
10.3389/neuro.04.002.2009
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发表时间:
2009
影响因子:
3.5
通讯作者:
Yuste R
Yuste R
中科院分区:
医学3区
文献类型:
--
作者:
Fino E;Araya R;Peterka DS;Salierno M;Etchenique R;Yuste R

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我们描述了RuBi - 谷氨酸盐的神经生物学应用,这是一种基于钌光化学的新型笼锁谷氨酸化合物。RuBi - 谷氨酸盐可被可见光波长激发,并在单光子或双光子激发后释放谷氨酸。它具有高量子效率,可在低浓度下使用,部分避免了其他笼锁化合物存在的对γ - 氨基丁酸能传递的阻断。RuBi - 谷氨酸盐的双光子解笼具有高空间分辨率,并能在单个树突棘中产生具有生理动力学的兴奋性反应。通过激光束复用,双光子RuBi - 谷氨酸盐解笼还可用于以单细胞分辨率使锥体神经元去极化并激发其放电。因此,RuBi - 谷氨酸盐能够利用可见光或双光子光源对神经元树突和回路进行光激活,实现单细胞甚至单个树突棘的精度。
We describe neurobiological applications of RuBi-Glutamate, a novel caged-glutamate compound based on ruthenium photochemistry. RuBi-Glutamate can be excited with visible wavelengths and releases glutamate after one- or two-photon excitation. It has high quantum efficiency and can be used at low concentrations, partly avoiding the blockade of GABAergic transmission present with other caged compounds. Two-photon uncaging of RuBi-Glutamate has a high spatial resolution and generates excitatory responses in individual dendritic spines with physiological kinetics. With laser beam multiplexing, two-photon RuBi-Glutamate uncaging can also be used to depolarize and fire pyramidal neurons with single-cell resolution. RuBi-Glutamate therefore enables the photoactivation of neuronal dendrites and circuits with visible or two-photon light sources, achieving single cell, or even single spine, precision.
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