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Developmental Cell Death in the Cerebral Cortex

机译:脑皮层中的发育细胞死亡

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In spite of the high metabolic cost of cellular production, the brain contains only a fraction of the neurons generated during embryonic development.In the rodent cerebral cortex, a first wave of programmed cell death surges at embryonic stages and affects primarily progenitor cells.A second, larger wave unfolds during early postnatal development and ultimately determines the final number of cortical neurons.Programmed cell death in the developing cortex is particularly dependent on neuronal activity and unfolds in a cell-specific manner with precise temporal control.Pyramidal cells and interneurons adjust their numbers in sync, which is likely crucial for the establishment of balanced networks of excitatory and inhibitory neurons.In contrast, several other neuronal populations are almost completely eliminated through apoptosis during the first two weeks of postnatal development, highlighting the importance of programmed cell death in sculpting the mature cerebral cortex.
机译:尽管细胞生产的代谢成本高,但大脑仅含有在胚胎发育过程中产生的神经元的一部分。在啮齿动物脑皮层中,胚胎阶段的第一波编程细胞死亡浪涌,主要影响祖细胞。第二 ,较大的波浪在早期产后开发期间展开,最终决定了皮质神经元的最终数量。显影皮层中的细胞死亡特别依赖于细胞特异性的神经元活性,并具有精确的颞下对照。逆向瘤细胞和中间核来调整它们的细胞 同步中的数字可能对建立兴奋性和抑制性神经元的平衡网络至关重要。对比,在产后后两周内通过细胞凋亡几乎完全消除了其他几种神经元群,突出了编程细胞死亡的重要性 塑造成熟的脑皮质。

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