Axon injury and regeneration in the adult Drosophila.

Axon injury and regeneration in the adult Drosophila.
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DOI:
10.1038/srep06199
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发表时间:
2014-08-27
期刊:
影响因子:
4.6
通讯作者:
Bonini NM
Bonini NM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Soares L;Parisi M;Bonini NM

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神经再生是一个迷人的过程,对人类健康有着深远的影响,因此确定生物学和遗传途径是感兴趣的。在这里,我们描述了一个成年果蝇神经元再生的体内准备。沿翅膀前缘的神经由约225个神经元组成,这些神经元向中枢神经(胸腔)发送投射。脉冲激光可以诱导精确的消融,切断整个轴突束。动物可以恢复,并随着时间的推移评估对伤害的反应。消融后,损伤部位附近的轴突局部丢失,瘢痕形成,对细胞骨架的快速影响,以及对血细胞的刺激。到第7天,约50%的动物显示神经再生,神经细胞的轴突向下延伸到损伤或重新布线。JNK信号的抑制促进损伤部位的再生,使轴索束再生。
Neural regeneration is a fascinating process with profound impact on human health, such that defining biological and genetic pathways is of interest. Here we describe an in vivo preparation for neuronal regeneration in the adult Drosophila. The nerve along the anterior margin of the wing is comprised of ~225 neurons that send projections into the central neuropil (thorax). Precise ablation can be induced with a pulsed laser to sever the entire axonal tract. The animal can be recovered, and response to injury assessed over time. Upon ablation, there is local loss of axons near the injury site, scar formation, a rapid impact on the cytoskeleton, and stimulation of hemocytes. By 7d, ~50% of animals show nerve regrowth, with axons from the nerve cells extending down towards the injury or re-routing. Inhibition of JNK signaling promotes regrowth through the injury site, enabling regeneration of the axonal tract.
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