Store-Operated Ca2+ Channels Contribute to the Generation of Ca2+ Waves in Interdental Cells in the Cochleae.

Store-Operated Ca2+ Channels Contribute to the Generation of Ca2+ Waves in Interdental Cells in the Cochleae.
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存储操作的 Ca2 通道有助于耳蜗齿间细胞中 Ca2 波的产生。

DOI:
10.1021/acschemneuro.3c00161
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发表时间:
2023
影响因子:
5
通讯作者:
Haibo Shi
Haibo Shi
中科院分区:
医学3区
文献类型:
--
作者:
Q. Ma;Jianning Zhang;W. Qi;Zhuangzhuang Li;Yumeng Jiang;Miao Zhang;Hao He;Kaiming Su;Haibo Shi

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耳蜗钙(Ca2+)波是耳蜗发育和听觉功能建立的重要调节因子。内支持细胞被认为是产生Ca2+波的主要区域,其作为内部刺激来协调毛细胞的发育和耳蜗中神经元的映射。然而,连接到内支持细胞和螺旋神经节神经元的齿间细胞(IDCs)中的Ca 2+波很少观察到,也知之甚少。在此,我们报告了IDC Ca2+波的形成和传播的机制,通过开发一种单细胞Ca2+激发技术,这可以很容易地实现使用双光子显微镜同时显微镜和飞秒激光Ca2+激发在任何目标单个细胞在新鲜耳蜗组织。我们证明,钙池操纵的钙通道在IDC负责在这些细胞中的钙波的形成。IDC的特定结构决定了Ca 2+波的传播。我们的研究结果提供了耳蜗内钙离子形成的机制和一种可控、精确、无创的耳蜗局部钙波激发技术,对耳蜗钙离子和听觉功能的研究具有良好的应用前景。
Cochlear calcium (Ca2+) waves are vital regulators of the cochlear development and establishment of hearing function. Inner supporting cells are believed to be the main region generating Ca2+ waves that work as internal stimuli to coordinate the development of hair cells and the mapping of neurons in the cochlea. However, Ca2+ waves in interdental cells (IDCs) that connect to inner supporting cells and spiral ganglion neurons are rarely observed and poorly understood. Herein, we reported the mechanism of IDC Ca2+ wave formation and propagation by developing a single-cell Ca2+ excitation technology, which can easily be accomplished using a two-photon microscope for simultaneous microscopy and femtosecond laser Ca2+ excitation in any target individual cell in fresh cochlear tissues. We demonstrated that the store-operated Ca2+ channels in IDCs are responsible for Ca2+ wave formation in these cells. The specific architecture of the IDCs determines the propagation of Ca2+ waves. Our results provide the mechanism of Ca2+ formation in IDCs and a controllable, precise, and noninvasive technology to excite local Ca2+ waves in the cochlea, with good potential for research on cochlear Ca2+ and hearing functions.
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