prdm12b specifies the p1 progenitor domain and reveals a role for V1 interneurons in swim movements.

prdm12b specifies the p1 progenitor domain and reveals a role for V1 interneurons in swim movements.
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prdm12b 指定 p1 祖细胞结构域并揭示 V1 中间神经元在游泳运动中的作用。

DOI:
10.1016/j.ydbio.2014.02.025
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发表时间:
2014
影响因子:
2.7
通讯作者:
Sagerström,CharlesG
Sagerström,CharlesG
中科院分区:
生物学3区
文献类型:
--
作者:
Zannino,DeniseA;Downes,GeraldB;Sagerström,CharlesG

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脊椎动物中枢神经系统的正常功能需要许多神经元细胞类型的精确定位。这种定位是在早期胚胎发生过程中建立的,当时基因调控网络沿着神经管的前后轴和背腹轴对神经管进行沿着排列。胚胎神经管的背腹侧图案产生多个祖细胞域,这些祖细胞域继续分化独特类别的神经元和神经胶质。虽然遗传程序是合理的理解一些谱系,如腹侧衍生的运动神经元和神经胶质,其他谱系少得多的特点。在这里,我们表明,prdm 12 b,一个成员的PR结构域包含家族的转录调节因子,表达在p1祖结构域的斑马鱼神经管响应Sonic刺猬信号。我们发现prdm 12 b功能的破坏导致nkx6.1表达的背侧扩张和p1-derivedeng 1b表达的V1中间神经元的丢失,而相邻的p0和p2结构域不受影响。我们还表明,prdm 12 b缺陷的鱼表现出异常的触摸诱发的逃避反应,过度的身体收缩和延长的反应时间,以及无法协调游泳运动,从而揭示了V1中间神经元在运动回路中的功能作用。我们的结论是prdm 12 bis需要V1中间神经元的规范,这些神经元控制斑马鱼的游泳运动。
Proper functioning of the vertebrate central nervous system requires the precise positioning of many neuronal cell types. This positioning is established during early embryogenesis when gene regulatory networks pattern the neural tube along its anteroposterior and dorsoventral axes. Dorsoventral patterning of the embryonic neural tube gives rise to multiple progenitor cell domains that go on to differentiate unique classes of neurons and glia. While the genetic program is reasonably well understood for some lineages, such as ventrally derived motor neurons and glia, other lineages are much less characterized. Here we show thatprdm12b, a member of thePR domain containing-family of transcriptional regulators, is expressed in the p1 progenitor domain of the zebrafish neural tube in response to Sonic Hedgehog signaling. We find that disruption ofprdm12bfunction leads to dorsal expansion ofnkx6.1expression and loss of p1-derivedeng1b-expressing V1 interneurons, while the adjacent p0 and p2 domains are unaffected. We also demonstrate thatprdm12b-deficient fish exhibit an abnormal touch-evoked escape response with excessive body contractions and a prolonged response time, as well as an inability to coordinate swimming movements, thereby revealing a functional role for V1 interneurons in locomotor circuits. We conclude thatprdm12bis required for V1 interneuron specification and that these neurons control swimming movements in zebrafish.
DOI: --
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