Dynamic expression of the pro-dopaminergic transcription factors Pax6 and Dlx2 during postnatal olfactory bulb neurogenesis.

Dynamic expression of the pro-dopaminergic transcription factors Pax6 and Dlx2 during postnatal olfactory bulb neurogenesis.
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DOI:
10.3389/fncel.2012.00006
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发表时间:
2012-01-05
影响因子:
5.3
通讯作者:
Beclin C
Beclin C
中科院分区:
医学2区
文献类型:
--
作者:
de Chevigny A;Core N;Follert P;Wild S;Bosio A;Yoshikawa K;Cremer H;Beclin C

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嗅球(OB)神经发生产生的神经元使用GABA或多巴胺作为其神经递质在整个生命。在侧脑室(LV)的脑室周围区(PVZ)中的区域化干细胞群已被证明是系统中神经元多样性的基础。例如,多巴胺能神经元主要来自位于背侧PVZ中的神经干细胞(NSC),并且依赖于转录因子Pax6和Dlx2的表达来进行其特化。此外,Dlx2通常是神经发生所必需的。使用有针对性的体内电穿孔结合免疫荧光成像和微阵列分析,我们在这里提供详细的空间和时间的表达数据与细胞分辨率在这个系统中。我们发现,所有沿着的神经源性过程Pax6的表达仍然局限于背侧PVZ,而几乎所有的神经母细胞表达Dlx 2,包括那些背侧血统,这是打开Dlx 2时,他们进入吻侧迁移流(RMS)。这些数据可以解释和精确的功能,这两个基因在出生后OB神经发生。
Olfactory bulb (OB) neurogenesis generates neurons that use GABA or dopamine as their neurotransmitters throughout life. Regionalized stem cell populations in the periventricular zone (PVZ) of the lateral ventricles (LVs) have been shown to be at the basis of neuronal diversity in the system. For example dopaminergic neurons arise predominantly from neural stem cells (NSCs) residing in the dorsal PVZ and depend on the expression of the transcription factors Pax6 and Dlx2 for their specification. In addition, Dlx2 is required for neurogenesis in general. Using targeted in vivo electroporation combined with immuno-fluorescence imaging and microarray analysis, we provide here detailed spatial and temporal expression data with cellular resolution in this system. We find that all along the neurogenic process Pax6 expression remains restricted to the dorsal PVZ, whereas nearly all neuroblasts express Dlx2, including those of the dorsal lineage, which are switched on for Dlx2 when they enter the rostral migratory stream (RMS). These data allow to explain and precise the functions of these two genes in postnatal OB neurogenesis.
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