Live-imaging of astrocyte morphogenesis and function in zebrafish neural circuits.

Live-imaging of astrocyte morphogenesis and function in zebrafish neural circuits.
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DOI:
10.1038/s41593-020-0703-x
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发表时间:
2020-10
影响因子:
25
通讯作者:
Monk KR
Monk KR
中科院分区:
医学1区
文献类型:
--
作者:
Chen J;Poskanzer KE;Freeman MR;Monk KR

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How astrocytes grow and integrate into neural circuits remains poorly defined. Zebrafish are well-suited for such investigations, but bona fide astrocytes have not been described in this system. Here, we characterize a zebrafish cell type that is remarkably similar to mammalian astrocytes that derive from radial glial cells and elaborate processes to establish their territories at early larval stages. Zebrafish astrocytes associate closely with synapses, tile with one another, and express markers including Glast and glutamine synthetase. Once integrated into circuits, they exhibit whole-cell and microdomain Ca2+ transients, which are sensitive to norepinephrine. Finally, using a cell-specific CRISPR/Cas9 approach we demonstrate that fgfr3/4 are required for vertebrate astrocyte morphogenesis. This work provides the first visualization of astrocyte morphogenesis from stem cell to post-mitotic astrocyte in vivo, identifies a role for Fgf receptors in vertebrate astrocytes, and establishes zebrafish as a valuable new model system to study astrocyte biology in vivo.
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影响因子: 34.7
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影响因子: 13.9
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