Fate of cajal-retzius neurons in the postnatal mouse neocortex.

Fate of cajal-retzius neurons in the postnatal mouse neocortex.
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DOI:
10.3389/neuro.05.010.2010
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发表时间:
2010
影响因子:
2.9
通讯作者:
Portera-Cailliau C
Portera-Cailliau C
中科院分区:
医学3区
文献类型:
--
作者:
Chowdhury TG;Jimenez JC;Bomar JM;Cruz-Martin A;Cantle JP;Portera-Cailliau C

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Cajal-Retzius (CR)神经元在皮层神经元迁移中起着至关重要的作用,但它们在新皮层层压完成后的确切命运仍然是一个谜。组织学证据无法明确地确定这些细胞是死亡还是经历表型转化成为成人新皮层第一层的常驻中间神经元。为了确定它们的最终命运,我们对在早期b细胞因子2 (Ebf2)启动子控制下表达绿色荧光蛋白(GFP)的小鼠出生后发育过程中鉴定的CR神经元进行了慢性体内双光子成像。我们发现,在出生后,小鼠新皮层中几乎所有CR神经元都表达Ebf2。尽管出生后的CR神经元经历了剧烈的形态转变,但它们不会迁移到更深的层。相反,它们从皮层逐渐消失是由于出生后第二周的细胞凋亡。出生时存在的一小部分CR神经元存活到成年。我们得出的结论是,除了协调皮层分层外,CR神经元的一个子集在出生后第三周之后必须发挥其他作用。
Cajal–Retzius (CR) neurons play a critical role in cortical neuronal migration, but their exact fate after the completion of neocortical lamination remains a mystery. Histological evidence has been unable to unequivocally determine whether these cells die or undergo a phenotypic transformation to become resident interneurons of Layer 1 in the adult neocortex. To determine their ultimate fate, we performed chronic in vivo two-photon imaging of identified CR neurons during postnatal development in mice that express the green fluorescent protein (GFP) under the control of the early B-cell factor 2 (Ebf2) promoter. We find that, after birth, virtually all CR neurons in mouse neocortex express Ebf2. Although postnatal CR neurons undergo dramatic morphological transformations, they do not migrate to deeper layers. Instead, their gradual disappearance from the cortex is due to apoptotic death during the second postnatal week. A small fraction of CR neurons present at birth survive into adulthood. We conclude that, in addition to orchestrating cortical layering, a subset of CR neurons must play other roles beyond the third postnatal week.
DOI: 10.1038/nprot.2009.89
发表时间: 2009
期刊: NATURE PROTOCOLS
影响因子: 14.8
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DOI: 10.1124/mi.2.1.47
发表时间: 2002-02-01
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发表时间: 1995-01-01
期刊: CEREBRAL CORTEX
影响因子: 3.7
作者:
DELRIO, JA;MARTINEZ, A;SORIANO, E
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DOI: 10.1016/0896-6273(95)90329-1
发表时间: 1995-05-01
期刊: NEURON
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