Myelin gene regulatory factor is a critical transcriptional regulator required for CNS myelination.

Myelin gene regulatory factor is a critical transcriptional regulator required for CNS myelination.
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DOI:
10.1016/j.cell.2009.04.031
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发表时间:
2009-07-10
期刊:
影响因子:
64.5
通讯作者:
Barres BA
Barres BA
中科院分区:
生物学1区
文献类型:
--
作者:
Emery B;Agalliu D;Cahoy JD;Watkins TA;Dugas JC;Mulinyawe SB;Ibrahim A;Ligon KL;Rowitch DH;Barres BA

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对中枢神经系统髓鞘基因表达的转录调控知之甚少。在这里,我们确定了基因模型98,我们将其命名为髓鞘基因调节因子(MRF),作为中枢神经系统髓鞘形成所需的转录调节因子。在中枢神经系统内,MRF由有丝分裂后的少突胶质细胞特异性表达。MRF是一种核蛋白,含有一个进化保守的DNA结合域,与酵母转录因子同源。通过RNA干扰抑制少突胶质细胞中的MRF可阻止大多数CNS髓鞘基因的表达;相反,在培养的少突胶质祖细胞或鸡脊髓中过表达MRF可促进髓鞘基因的表达。在少突胶质细胞谱系中缺乏MRF的小鼠,可以产生髓鞘前少突胶质细胞,但显示髓鞘基因表达严重缺陷,无法髓鞘形成。这些小鼠表现出严重的神经异常,并在出生后第三周死于癫痫发作。这些发现证实了MRF是少突胶质细胞成熟和中枢神经系统髓鞘形成所必需的关键转录调节因子。
The transcriptional control of CNS myelin gene expression is poorly understood. Here we identify gene model 98, which we have named Myelin-gene Regulatory Factor (MRF), as a transcriptional regulator required for CNS myelination. Within the CNS, MRF is specifically expressed by postmitotic oligodendrocytes. MRF is a nuclear protein containing an evolutionarily conserved DNA binding domain homologous to a yeast transcription factor. Knockdown of MRF in oligodendrocytes by RNA interference prevents expression of most CNS myelin genes; conversely, overexpression of MRF within cultured oligodendrocyte progenitors or the chick spinal cord promotes expression of myelin genes. In mice lacking MRF within the oligodendrocyte lineage, pre-myelinating oligodendrocytes are generated but display severe deficits in myelin gene expression and fail to myelinate. These mice display severe neurological abnormalities, and die due to seizures during the third postnatal week. These findings establish MRF as a critical transcriptional regulator essential for oligodendrocyte maturation and CNS myelination.
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