Lineage tracing of direct astrocyte-to-neuron conversion in the mouse cortex.

Lineage tracing of direct astrocyte-to-neuron conversion in the mouse cortex.
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小鼠皮质中星形胶质细胞直接转化为神经元的谱系追踪

DOI:
10.4103/1673-5374.295925
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发表时间:
2021-04
影响因子:
6.1
通讯作者:
Chen G
Chen G
中科院分区:
医学2区
文献类型:
--
作者:
Xiang Z;Xu L;Liu M;Wang Q;Li W;Lei W;Chen G

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在成年哺乳动物中枢神经系统中再生功能性新神经元已被证明是非常具有挑战性的,因为神经元在神经元丢失后无法分裂和重新填充自己。另一方面,神经胶质细胞可以在受伤或患病的情况下分裂和再生。我们之前报道过神经d1在分裂胶质细胞中的异位表达可以直接将其转化为神经元。在这里,我们使用星形细胞谱系追踪报告小鼠(Aldh1l1-CreERT2小鼠与Ai14小鼠杂交),证明了谱系追踪的星形细胞通过腺相关病毒表达NeuroD1后可以成功转化为neun阳性神经元。逆转录病毒NeuroD1的表达进一步证实了分裂的神经胶质细胞可以转化为神经元。重要的是,我们证明了在体内细胞转化研究中,在啮齿动物大脑中使用安全水平的腺相关病毒剂量(1010-1012 gc/mL, 1µL)对于避免有毒剂量引起的假象至关重要,例如在最近的bioRxiv研究中使用的剂量(2 × 1013 gc/mL, 1µL,小鼠皮质)。为了在损伤或疾病条件下的治疗目的,或用于非人灵长类动物的研究,需要通过一系列的剂量发现实验来优化腺相关病毒的剂量。此外,对于未来的体内胶质细胞向神经元转化的研究,我们建议用在胶质细胞分裂中主要表达转基因的逆转录病毒进一步验证腺相关病毒的结果,以得出可靠的结论。本研究经暨南大学实验动物伦理委员会批准(批准号:IACUC-20180330-06)于2018年3月30日发布。
Regenerating functional new neurons in the adult mammalian central nervous system has been proven to be very challenging due to the inability of neurons to divide and repopulate themselves after neuronal loss. Glial cells, on the other hand, can divide and repopulate themselves under injury or diseased conditions. We have previously reported that ectopic expression of NeuroD1 in dividing glial cells can directly convert them into neurons. Here, using astrocytic lineage-tracing reporter mice (Aldh1l1-CreERT2 mice crossing with Ai14 mice), we demonstrate that lineage-traced astrocytes can be successfully converted into NeuN-positive neurons after expressing NeuroD1 through adeno-associated viruses. Retroviral expression of NeuroD1 further confirms that dividing glial cells can be converted into neurons. Importantly, we demonstrate that for in vivo cell conversion study, using a safe level of adeno-associated virus dosage (1010–1012 gc/mL, 1 µL) in the rodent brain is critical to avoid artifacts caused by toxic dosage, such as that used in a recent bioRxiv study (2 × 1013 gc/mL, 1 µL, mouse cortex). For therapeutic purpose under injury or diseased conditions, or for non-human primate studies, adeno-associated virus dosage needs to be optimized through a series of dose-finding experiments. Moreover, for future in vivo glia-to-neuron conversion studies, we recommend that the adeno-associated virus results are further verified with retroviruses that mainly express transgenes in dividing glial cells in order to draw solid conclusions. The study was approved by the Laboratory Animal Ethics Committee of Jinan University, China (approval No. IACUC-20180330-06) on March 30, 2018.
DOI: 10.1371/journal.pbio.1000373
发表时间: 2010-05-18
期刊: PLoS biology
影响因子: 9.8
作者:
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期刊: Molecular therapy. Methods & clinical development
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发表时间: 2016-03-03
期刊: CELL STEM CELL
影响因子: 23.9
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DOI: 10.1016/j.neuron.2013.12.034
发表时间: 2014-01-22
期刊: Neuron
影响因子: 16.2
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通讯作者: Sofroniew MV
DOI: 10.1172/jci1505
发表时间: 1998-05-15
影响因子: 15.9
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