Identification of a distant cis-regulatory element controlling pharyngeal arch-specific expression of zebrafish gdf6a/radar.

Identification of a distant cis-regulatory element controlling pharyngeal arch-specific expression of zebrafish gdf6a/radar.
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DOI:
10.1002/dvdy.22251
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发表时间:
2010-04
影响因子:
2.5
通讯作者:
Mortlock, Douglas P.
Mortlock, Douglas P.
中科院分区:
生物学3区
文献类型:
--
作者:
Reed, Nykolaus P.;Mortlock, Douglas P.

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骨骼的形成是脊椎动物发育过程中一个重要而复杂的调控部分。缺乏生长和分化因子6(Gdf 6)的人类和小鼠具有许多骨骼异常,包括关节融合和软骨减少。Gdf 6的表达是动态的,部分受远距离进化保守的顺式调控元件的调控。radar/gdf 6a是Gdf 6的斑马鱼直系同源物,并且在胚胎图案形成中具有重要作用。在这里,我们表明,雷达转录的细胞周围和之间的腹侧咽弓,类似于小鼠GDF 6的发展中软骨。一个312 bp的进化保守区(ECR 5),下游122个酶,驱动咽弓特异性的方式类似于内源性雷达/gdf 6a的表达。缺失分析确定了一个78 bp的区域内的ECR 5是必不可少的转基因活性。这项工作说明,雷达调节在咽弓由一个遥远的保守元件,并建议雷达在鱼类和哺乳动物的骨骼发育具有类似的功能。
Skeletal formation is an essential and intricately regulated part of vertebrate development. Humans and mice deficient in Growth and Differentiation Factor 6 (Gdf6) have numerous skeletal abnormalities including joint fusions and cartilage reductions. The expression of Gdf6 is dynamic and in part regulated by distant evolutionarily conserved cis-regulatory elements. radar/gdf6a is a zebrafish ortholog of Gdf6 and has an essential role in embryonic patterning. Here we show that radar is transcribed in the cells surrounding and between the developing cartilages of the ventral pharyngeal arches, similar to mouse Gdf6. A 312 bp evolutionarily conserved region (ECR5), 122 kilobases downstream, drives expression in a pharyngeal arch-specific manner similar to endogenous radar/gdf6a. Deletion analysis identified a 78 bp region within ECR5 that is essential for transgene activity. This work illustrates that radar is regulated in the pharyngeal arches by a distant conserved element and suggests radar has similar functions in skeletal development in fish and mammals.
通过 Bmp5 基因中的模块化调控元件塑造骨骼生长。
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