Comparative gene expression analysis of genital tubercle development reveals a putative appendicular Wnt7 network for the epidermal differentiation.

Comparative gene expression analysis of genital tubercle development reveals a putative appendicular Wnt7 network for the epidermal differentiation.
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DOI:
10.1016/j.ydbio.2010.05.495
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发表时间:
2010-08-15
影响因子:
2.7
通讯作者:
Little MH
Little MH
中科院分区:
生物学3区
文献类型:
--
作者:
Chiu HS;Szucsik JC;Georgas KM;Jones JL;Rumballe BA;Tang D;Grimmond SM;Lewis AG;Aronow BJ;Lessard JL;Little MH

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在这里,我们描述了第一个详细的基因表达目录, 发育中的下尿路(LUT),包括上皮和间质 发育中的膀胱、尿生殖窦、尿道和生殖器的部分 E13和E14的结节(GT)。与基因组学相关的顶级区室特异性基因 微阵列数据使用原位整体装载进行验证 在整个LUT上的杂交(ISH)。为了证明这一点的潜力 资源牵连发展的关键特征,我们专注于基因 表达模式和途径在性不确定, 雄激素非依赖性GT。GT表达模式加强了建议 GT、肢体和颅面发育的相似性。 空间表达模式的比较预测了 Wnt7a相关GT富集上皮基因,包括 Gjb2、Dsc3、Krt5和Sostdc1。中已知 在其他情况下,这些基因与正常的表皮细胞相关, 分化,Dsc 3和 Gjb2显示四肢掌跖角化病。我们 提出这种基因网络有助于正常的包皮,阴囊和 唇发育因为其中几种已知受顺式调节或含有顺式 元素对维甲酸,雌激素或雄激素反应,这意味着 这一途径在后来的雄激素依赖性发展的GT。
Here we describe the first detailed catalogue of gene expression in the developing lower urinary tract (LUT), including epithelial and mesenchymal portions of the developing bladder, urogenital sinus, urethra and genital tubercle (GT) at E13 and E14. Top compartment-specific genes implicated by the microarray data were validated using wholemount in situ hybridization (ISH) over the entire LUT. To demonstrate the potential of this resource to implicate developmentally critical features, we focused on gene expression patterns and pathways in the sexually indeterminate, androgen-independent GT. GT expression patterns reinforced the proposed similarities between development of GT, limb and craniofacial prominences. Comparison of spatial expression patterns predicted a network of Wnt7a-associated GT-enriched epithelial genes, including Gjb2, Dsc3, Krt5 and Sostdc1. Known from other contexts, these genes are associated with normal epidermal differentiation, with disruptions in Dsc3 and Gjb2 showing palmo-plantar keratoderma in the limb. We propose that this gene network contributes to normal foreskin, scrotum and labial development. As several of these are known regulated by, or contain cis elements responsive to retinoic acid, estrogen, or androgen, this implicates this pathway in the later androgen-dependent development of the GT.
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