A possible role for the immune system in adult neurogenesis: new insights from an invertebrate model.

A possible role for the immune system in adult neurogenesis: new insights from an invertebrate model.
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免疫系统在成人神经发生中的可能作用:来自无脊椎动物模型的新见解

DOI:
10.1016/j.zool.2015.11.003
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发表时间:
2016
期刊:
影响因子:
2
通讯作者:
Hallbach O
Hallbach O
中科院分区:
生物学3区
文献类型:
--
作者:
Harzsch S;von Bohlen;Hallbach O

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脊椎动物和无脊椎动物的成年大脑中的持续神经发生以前被认为是由外胚层起源的自我更新神经元干细胞驱动的。最近在无脊椎动物模型中的发现挑战了这一观点,而是提供了从非神经元来源招募神经元前体的证据。在成年小龙虾的大脑中,发现了一个神经源性小生境,它为成年中央嗅觉通路的后代做出了贡献。小生境可以从血淋巴中吸引细胞并将它们转化为具有神经元命运的细胞。这一发现意味着位于小龙虾神经原生态位的第一代神经元前体不能自我更新。证据总结支持一个重要的重新评估哺乳动物神经元干细胞的长期自我更新。最新的研究结果表明,免疫系统和驱动成年神经发生的系统之间的紧密联系可能不仅存在于小龙虾中,也存在于哺乳动物中。
Persistent neurogenesis in the adult brain of both vertebrates and invertebrates was previously considered to be driven by self-renewing neuronal stem cells of ectodermal origin. Recent findings in an invertebrate model challenge this view and instead provide evidence for a recruitment of neuronal precursors from a non-neuronal source. In the brain of adult crayfish, a neurogenic niche was identified that contributes progeny to the adult central olfactory pathway. The niche may function in attracting cells from the hemolymph and transforming them into cells with a neuronal fate. This finding implies that the first-generation neuronal precursors located in the crayfish neurogenic niche are not self-renewing. Evidence is summarized in support of a critical re-evaluation of long-term self-renewal of mammalian neuronal stem cells. Latest findings suggest that a tight link between the immune system and the system driving adult neurogenesis may not only exist in the crayfish but also in mammals.
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