The transcription factor Tbx5 regulates direction-selective retinal ganglion cell development and image stabilization.

The transcription factor Tbx5 regulates direction-selective retinal ganglion cell development and image stabilization.
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DOI:
10.1016/j.cub.2022.07.064
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发表时间:
2022-10-10
期刊:
影响因子:
9.2
通讯作者:
Kolodkin, Alex L.
Kolodkin, Alex L.
中科院分区:
生物学1区
文献类型:
--
作者:
Al-Khindi, Timour;Sherman, Michael B.;Kodama, Takashi;Gopal, Preethi;Pan, Zhiwei;Kiraly, James K.;Zhang, Hao;Goff, Loyal A.;du Lac, Sascha;Kolodkin, Alex L.

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由哺乳动物视觉系统处理的视觉输入的多样性需要产生许多不同的视网膜神经节细胞(RGC)类型,每种类型调节到特定的特征。产生这种细胞类型多样性所需的分子密码知之甚少。在这里,我们专注于指定一种类型的视网膜细胞所需的分子:向上偏好的方向选择性神经节细胞(up-oDSGC)的小鼠视觉系统。单细胞转录组学分析显示转录因子Tbx 5在up-oDSGCs中选择性表达。在up-oDSGCs中Tbx 5的缺失导致up-oDSGCs形成中的选择性缺陷和相应的检测垂直运动的能力丧失。Tbx 5的下游效应子Sfrp 1对于垂直运动检测也是至关重要的,但对up-oDSGC形成不是。这些结果推进了我们对指定罕见视网膜细胞类型的分子机制的理解,并显示了破坏这种指定如何导致神经回路和行为的相应缺陷。目前对不同类型的视网膜神经节细胞所需的分子密码知之甚少。Al-Khindi等人表明转录因子Tbx 5由向上偏好的ON DSGCs表达,并且是它们的初始形成和垂直运动的正确检测所需的。
The diversity of visual input processed by the mammalian visual system requires the generation of many distinct retinal ganglion cell (RGC) types, each tuned to a particular feature. The molecular code needed to generate this cell type diversity is poorly understood. Here we focus on the molecules needed to specify one type of retinal cell: the upward-preferring ON direction-selective ganglion cell (up-oDSGC) of the mouse visual system. Single-cell transcriptomic profiling of up- and down-oDSGCs shows that the transcription factor Tbx5 is selectively expressed in up-oDSGCs. Loss of Tbx5 in up-oDSGCs results in a selective defect in the formation of up-oDSGCs and a corresponding inability to detect vertical motion. A downstream effector of Tbx5, Sfrp1, is also critical for vertical motion detection but not up-oDSGC formation. These results advance our understanding of the molecular mechanisms that specify a rare retinal cell type and show how disrupting this specification leads to a corresponding defect in neural circuitry and behavior. Little is known about the molecular code needed to specify different retinal ganglion cell types. Al-Khindi et al. show that the transcription factor Tbx5 is expressed by upward-preferring ON DSGCs and is required for their initial formation and the proper detection of vertical motion.
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