Hif1α-dependent hypoxia signaling contributes to the survival of deep-layer neurons and cortex formation in a mouse model.

Hif1α-dependent hypoxia signaling contributes to the survival of deep-layer neurons and cortex formation in a mouse model.
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DOI:
10.1186/s13041-022-00911-0
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发表时间:
2022-03-31
期刊:
影响因子:
3.6
通讯作者:
Shoji H
Shoji H
中科院分区:
医学3区
文献类型:
--
作者:
Sakai D;Sugawara T;Kurokawa T;Murakami Y;Tomosugi M;Masuta H;Sakata-Haga H;Hatta T;Shoji H

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缺氧诱导因子 1 α (Hif1α) 在大脑发育中起着至关重要的作用。为了研究 Hif1α 在早期大脑发育中的功能,我们培育了神经上皮细胞特异性 Hif1α 敲除小鼠。 Hif1α 基因敲除小鼠出生后不久就死亡;这些小鼠表现出异常的头部形状,表明存在大脑缺陷。形态学分析表明,Hif1α 消融缩小了大脑的整体尺寸,尤其是影响端脑。神经元凋亡主要发生在深层神经元,因此 Hif1α 敲除小鼠的皮质层排列严重紊乱。此外,我们证明 Vegf 信号作为 Hif1α 依赖性缺氧信号的下游效应器有助于深层神经元的存活。综上所述,我们的研究结果表明 Hif1α 在端脑发育的早期阶段发挥着关键作用。在线版本包含可在 10.1186/s13041-022-00911-0 获取的补充材料。
Hypoxia-inducible factor 1 α (Hif1α) plays a crucial role in brain development. To study the function of Hif1α in early brain development, we generated neuroepithelial cell-specific Hif1α-knockout mice. Hif1α-knockout mice died soon after birth; these mice exhibited an abnormal head shape, indicating the presence of brain defects. Morphological analysis revealed that Hif1α ablation reduced the overall size of the brain, especially affecting the telencephalon. Neuronal apoptosis predominantly occurred in deep-layer neurons, consequently the alignment of cortical layers was severely disorganized in Hif1α knockout mice. Furthermore, we demonstrated that Vegf signaling contributes to the survival of deep-layer neurons as a downstream effector of Hif1α-dependent hypoxia signaling. Taken together, our findings demonstrate that Hif1α plays a critical role in the early stages of telencephalon development. The online version contains supplementary material available at 10.1186/s13041-022-00911-0.
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