Distinct enhancers at the Pax3 locus can function redundantly to regulate neural tube and neural crest expressions.

Distinct enhancers at the Pax3 locus can function redundantly to regulate neural tube and neural crest expressions.
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DOI:
10.1016/j.ydbio.2009.12.030
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发表时间:
2010-03-15
影响因子:
2.7
通讯作者:
Epstein JA
Epstein JA
中科院分区:
生物学3区
文献类型:
--
作者:
Degenhardt KR;Milewski RC;Padmanabhan A;Miller M;Singh MK;Lang D;Engleka KA;Wu M;Li J;Zhou D;Antonucci N;Li L;Epstein JA

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Pax3是一种在胚胎发育过程中体细胞中胚层、背神经管和迁移前神经嵴中表达的转录因子。我们以前已经确定了顺式作用的增强子元件内的近端上游基因组区域的Pax3,足以指导功能性表达的Pax3在神经嵴。这些元件将报告基因的表达引导至转基因小鼠中的迁移前神经嵴,并且使用这些元件的Pax3 cDNA的转基因表达足以挽救否则缺乏内源性Pax3的小鼠中的神经嵴发育。我们在这里表明,通过同源重组删除这些增强子序列是不足以废除神经嵴表达的Pax3和结果在可行的小鼠。我们确定了一个独特的增强子在第四内含子,也能够介导神经嵴的表达在转基因小鼠和斑马鱼。我们的分析表明,存在功能冗余的神经嵴增强模块的Pax3。
Pax3 is a transcription factor expressed in somitic mesoderm, dorsal neural tube and pre-migratory neural crest during embryonic development. We have previously identified cis-acting enhancer elements within the proximal upstream genomic region of Pax3 that are sufficient to direct functional expression of Pax3 in neural crest. These elements direct expression of a reporter gene to pre-migratory neural crest in transgenic mice, and transgenic expression of a Pax3 cDNA using these elements is sufficient to rescue neural crest development in mice otherwise lacking endogenous Pax3. We show here that deletion of these enhancer sequences by homologous recombination is insufficient to abrogate neural crest expression of Pax3 and results in viable mice. We identify a distinct enhancer in the fourth intron that is also capable of mediating neural crest expression in transgenic mice and zebrafish. Our analysis suggests the existence of functionally redundant neural crest enhancer modules for Pax3.
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发表时间: 1954-01-01
影响因子: --
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