The Basic Helix-Loop-Helix Transcription Factor Olig2 Is Critical for Reactive Astrocyte Proliferation after Cortical Injury

被引:85
作者
Chen, Ying [1 ,4 ]
Miles, Darryl K. [1 ,4 ]
Hoang, ThaoNguyen [1 ,4 ]
Shi, Jian [1 ,4 ]
Hurlock, Edward [1 ,4 ]
Kernie, Steven G. [1 ,2 ,4 ]
Lu, Q. Richard [1 ,3 ,4 ]
机构
[1] Univ Texas SW Med Ctr Dallas, Dept Dev Biol, Dallas, TX 75390 USA
[2] Univ Texas SW Med Ctr Dallas, Dept Pediat, Dallas, TX 75390 USA
[3] Univ Texas SW Med Ctr Dallas, Dept Mol Biol, Dallas, TX 75390 USA
[4] Univ Texas SW Med Ctr Dallas, Kent Waldrep Fdn, Ctr Basic Neurosci Res Nerve Growth & Regenerat, Dallas, TX 75390 USA
基金
美国国家卫生研究院;
关键词
bHLH transcription factor; Olig2; conditional knock-out mice; reactive astrocytes; proliferation; cortical injury;
D O I
10.1523/JNEUROSCI.3545-08.2008
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The mechanisms underlying the formation of the glial scar after injury are poorly understood. In this report, we demonstrate that after cortical injury Olig2 is upregulated in reactive astrocytes coincident with proliferation of these cells. Short-term lineage tracing studies with glial subtype-restricted transgenic reporter lines indicate that Olig2-expressing cells in the astroglial but not the oligodendroglial lineage are the essential source of reactive astrocytes. In addition, cortical Olig2 ablation results in a decrease in proliferation of reactive astrocytes in response to injury. Cell-type-specific mutagenesis indicates that Olig2 ablation in GFAP+ astrocytes and their precursors rather than in neuronal or oligodendroglial cells is responsible for the reduction of reactive astrocyte proliferation. Thus, our studies suggest that Olig2 is critical for postinjury gliosis.
引用
收藏
页码:10983 / 10989
页数:7
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