Gsx transcription factors control neuronal versus glial specification in ventricular zone progenitors of the mouse lateral ganglionic eminence.

Gsx transcription factors control neuronal versus glial specification in ventricular zone progenitors of the mouse lateral ganglionic eminence.
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DOI:
10.1016/j.ydbio.2018.07.005
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发表时间:
2018-10-01
影响因子:
2.7
通讯作者:
Waclaw RR
Waclaw RR
中科院分区:
生物学3区
文献类型:
--
作者:
Chapman H;Riesenberg A;Ehrman LA;Kohli V;Nardini D;Nakafuku M;Campbell K;Waclaw RR

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同源盒基因 Gsx2 先前已被证明可以抑制腹侧端脑背外侧神经节隆起 (dLGE) 祖细胞的少突胶质细胞分化。然而,在 Gsx2 突变体中观察到的少突胶质细胞祖细胞 (OPC) 的早熟特性是短暂的,并在胚胎发生的后期开始正常化。有趣的是,这种标准化与 Gsx1 的扩展相关,Gsx1 是 Gsx2 的密切同源物,在 Gsx2 突变体 LGE 的祖细胞子集中。在这里,我们探讨了 Gsx2 突变体中与 Gsx1 相关的少突胶质细胞规范的潜在机制。我们发现,Gsx1/2 双突变体胚胎在 dLGE 的室下区 (SVZ) 中表现出比 Gsx2 突变体更强劲的 Olig2+ 细胞(即 OPC)扩张。此外,从 E15 起,整个端脑 VZ 祖细胞中 Gsx1 的错误表达导致皮质 OPC 显着减少。这些结果证明了 Gsx1 和 Gsx2 在抑制 LGE VZ 祖细胞中早期 OPC 规范方面的冗余作用。然而,与 Gsx2 突变体相比,Gsx1/2 突变体在后期并没有显示出邻近皮质 OPC 的显着增加。这可能是由于 Gsx1/2 双突变体 LGE 的 SVZ 内 OPC 增殖减少所致,表明 Gsx1 在腹侧端脑中迁移 OPC 的扩张中具有新作用。我们通过生成 Olig2/Gsx2 双突变体进一步研究了 Gsx2 下游的胶质细胞规范机制。与 Olig2 在 OPC 规范中已知的重要作用一致,在 Gsx2 突变体中观察到的皮质 OPC 异位产生在 Olig2/Gsx2 双突变体中消失。然而,与 Gsx2 单突变体类似,这些突变体在 LGE 的 VZ 中维持了胶质细胞生成标记物 Zbtb20 和 Bcan 的扩展表达,表明 Gsx2 通过 Olig2 依赖和独立机制抑制胶质细胞生成。
The homeobox gene Gsx2 has previously been shown to inhibit oligodendroglial specification in dorsal lateral ganglionic eminence (dLGE) progenitors of the ventral telencephalon. The precocious specification of oligodendrocyte progenitor cells (OPCs) observed in Gsx2 mutants, however, is transient and begins to normalize by late stages of embryogenesis. Interestingly, this normalization correlates with the expansion of Gsx1, a close homolog of Gsx2, in a subset of progenitors in the Gsx2 mutant LGE. Here, we interrogated the mechanisms underlying oligodendroglial specification in Gsx2 mutants in relation to Gsx1. We found that Gsx1/2 double mutant embryos exhibit a more robust expansion of Olig2+ cells (i.e. OPCs) in the subventricular zone (SVZ) of the dLGE than Gsx2 mutants. Moreover, misexpression of Gsx1 throughout telencephalic VZ progenitors from E15 and onward resulted in a significant reduction of cortical OPCs. These results demonstrate redundant roles of Gsx1 and Gsx2 in suppressing early OPC specification in LGE VZ progenitors. However, Gsx1/2 mutants did not show a significant increase in adjacent cortical OPCs at later stages compared to Gsx2 mutants. This is likely due to reduced proliferation of OPCs within the SVZ of the Gsx1/2 double mutant LGE, suggesting a novel role for Gsx1 in expansion of migrating OPCs in the ventral telencephalon. We further investigated the glial specification mechanisms downstream of Gsx2 by generating Olig2/Gsx2 double mutants. Consistent with the known essential role for Olig2 in OPC specification, ectopic production of cortical OPCs observed in Gsx2 mutants disappeared in Olig2/Gsx2 double mutants. These mutants, however, maintained the expanded expression of gliogenic markers Zbtb20 and Bcan in the VZ of the LGE similarly to Gsx2 single mutants, suggesting that Gsx2 suppresses gliogenesis via Olig2-dependent and -independent mechanisms.
DOI: 10.1523/jneurosci.0805-13.2013
发表时间: 2013-06-05
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
作者:
Nakatani H;Martin E;Hassani H;Clavairoly A;Maire CL;Viadieu A;Kerninon C;Delmasure A;Frah M;Weber M;Nakafuku M;Zalc B;Thomas JL;Guillemot F;Nait-Oumesmar B;Parras C
通讯作者: Parras C
DOI: 10.1186/s13064-017-0090-5
发表时间: 2017-08-16
期刊: Neural development
影响因子: 3.6
作者:
Qin S;Ware SM;Waclaw RR;Campbell K
通讯作者: Campbell K
DOI: 10.1006/dbio.1997.8733
发表时间: 1997-11-15
影响因子: 2.7
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Szucsik, JC;Witte, DP;Potter, SS
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DOI: 10.1002/aja.1002030306
发表时间: 1995-07-01
影响因子: 2.5
作者:
VALERIUS, MT;LI, H;POTTER, SS
通讯作者: POTTER, SS
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DOI: 10.1083/jcb.123.3.513
发表时间: 1993-11
影响因子: 7.8
作者:
Schluter, C;Duchrow, M;Wohlenberg, C;Becker, M H;Key, G;Flad, H D;Gerdes, J
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