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Updated: Jun 12, 2025

Transpupillary Two-Photon In Vivo Imaging of the Mouse Retina
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在老鼠视网膜中的Synaptotagmin-9

Chris S Mesnard1,2, Cassandra L Hays1,3, Lou E Townsend1,2

  • 1Truhlsen Eye Institute and Department of Ophthalmology and Visual Sciences, University of Nebraska Medical Center, Omaha, NE, USA.

Visual neuroscience
|September 18, 2024
PubMed
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合成塔格明-9 (Syt9) 存在于视网膜中,影响视觉信号传递. 在棒中消除Syt9会改变电网红图的反应,这表明它在形信号传输中的作用.

科学领域:

  • 神经科学是一个神经科学.
  • 视网膜生理学 视网膜生理学
  • 分子生物学分子生物学

背景情况:

  • 赛纳普托塔格明-9 (Syt9) 是一种已知用于大脑快速突触释放的传感器.
  • 在视网膜中Syt9的表达和功能在很大程度上仍然未被描述.

研究的目的:

  • 研究Syt9在哺乳动物视网膜中的存在和作用.
  • 确定Syt9对棒和圆光感受器视觉处理的具体贡献.

主要方法:

  • 生成的条件淘汰赛小鼠 (Syt9fl/fl) 与Cre驱动线 (Rho-iCre,HRGP-Cre,CMV-Cre) 交叉,以在杆,或全球消除Syt9.
  • 记录的电网红图 (ERG) 用于评估视觉功能在光学和光学条件下.
  • 测量了单个棒中的突触释放,使用阳离子电流记录.

主要成果:

  • 全球Syt9淘汰赛 (CMVSyt9) 增加了scotopic ERG b波,但没有影响a波.
  • 从 (coneSyt9CKO) 中选择性消除Syt9对ERG没有显著影响.
  • 棒特异性的Syt9删除 (rodSyt9CKO) 减少了scotopic和 photopicb波和振荡潜力,特别是在明亮的闪光条件下.
关键词:
一个电网红图 (electroretinogram) 是一个电网红图.视网膜 视网膜 视网膜 是一个带带突触的突触.杆光感受器细胞是杆光感受器细胞.这是一种突触突触 (synaptotagmin).

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Last Updated: Jun 12, 2025

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  • 棒中Syt9的损失并没有改变自发或引起的突触释放.

    • 结论:

    • Syt9在视网膜中表达,并在视觉处理中发挥功能性作用.
    • 棒中的Syt9对于正常的ERG b波和振荡电位振幅在涉及形输入的条件下至关重要.
    • Syt9可以通过棒通道调节通过介导的视觉信号的传输.