Differential proliferation rhythm of neural progenitor and oligodendrocyte precursor cells in the young adult hippocampus.

Differential proliferation rhythm of neural progenitor and oligodendrocyte precursor cells in the young adult hippocampus.
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DOI:
10.1371/journal.pone.0027628
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Osumi N
Osumi N
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Matsumoto Y;Tsunekawa Y;Nomura T;Suto F;Matsumata M;Tsuchiya S;Osumi N

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少突胶质细胞前体细胞(OPC)是一种独特类型的神经胶质细胞,其功能为少突胶质细胞祖细胞,同时在正常条件下从啮齿类动物到人类不断增殖。然而,它们在成人大脑中发挥的功能作用在很大程度上尚不清楚。在本研究中,我们重点研究年轻成年小鼠海马中 OPC 的增殖方式。在此,我们报道 OPC 增殖中存在振荡动力学,这与颗粒下区 (SGZ) 的神经发生不同。前者在静止期和活动期分别出现S期和M期峰值,而后者仅在活动期出现M期峰值。不同的增殖模式和对细胞周期至关重要的细胞周期蛋白的表达之间存在一致性; cyclin D1 在 OPC 中表达,而 cyclin D2 在神经干细胞中表达。与神经发生类似,海马 OPC 的增殖通过自愿运动而增强,从而导致海马神经元活动增加。这些数据表明海马体中 OPC 增殖的有趣控制。
Oligodendrocyte precursor cells (OPCs) are a unique type of glial cells that function as oligodendrocyte progenitors while constantly proliferating in the normal condition from rodents to humans. However, the functional roles they play in the adult brain are largely unknown. In this study, we focus on the manner of OPC proliferation in the hippocampus of the young adult mice. Here we report that there are oscillatory dynamics in OPC proliferation that differ from neurogenesis in the subgranular zone (SGZ); the former showed S-phase and M-phase peaks in the resting and active periods, respectively, while the latter only exhibited M-phase peak in the active period. There is coincidence between different modes of proliferation and expression of cyclin proteins that are crucial for cell cycle; cyclin D1 is expressed in OPCs, while cyclin D2 is observed in neural stem cells. Similar to neurogenesis, the proliferation of hippocampal OPCs was enhanced by voluntary exercise that leads to an increase in neuronal activity in the hippocampus. These data suggest an intriguing control of OPC proliferation in the hippocampus.
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