...
首页> 外文期刊>Development >Identification of Pax2-regulated genes by expression profiling of the mid-hindbrain organizer region.
【24h】

Identification of Pax2-regulated genes by expression profiling of the mid-hindbrain organizer region.

机译:通过中枢神经组织区的表达谱鉴定Pax2调控的基因。

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

The paired domain transcription factor Pax2 is required for the formation of the isthmic organizer (IsO) at the midbrain-hindbrain boundary, where it initiates expression of the IsO signal Fgf8. To gain further insight into the role of Pax2 in mid-hindbrain patterning, we searched for novel Pax2-regulated genes by cDNA microarray analysis of FACS-sorted GFP+ mid-hindbrain cells from wild-type and Pax2-/- embryos carrying a Pax2(GFP) BAC transgene. Here, we report the identification of five genes that depend on Pax2 function for their expression in the mid-hindbrain boundary region. These genes code for the transcription factors En2 and Brn1 (Pou3f3), the intracellular signaling modifiers Sef and Tapp1, and the non-coding RNA Ncrms. The Brn1 gene was further identified as a direct target of Pax2, as two functional Pax2-binding sites in the promoter and in an upstream regulatory element of Brn1 were essential for lacZ transgene expression at the mid-hindbrain boundary. Moreover, ectopic expression of a dominant-negative Brn1 protein in chick embryos implicated Brn1 in Fgf8 gene regulation. Together, these data defined novel functions of Pax2 in the establishment of distinct transcriptional programs and in the control of intracellular signaling during mid-hindbrain development.
机译:成对的域转录因子Pax2是在中脑-后脑边界形成等位组织者(IsO)所必需的,在该处它启动了IsO信号Fgf8的表达。为了进一步了解Pax2在中脑梗阻模式中的作用,我们通过cDNA微阵列分析从野生型和携带Pax2的Pax2-/-胚胎的FACS分拣的GFP +中后脑细胞中寻找了新的Pax2调控基因。 GFP)BAC转基因。在这里,我们报告了五个基因的鉴定,这些基因依赖于Pax2在中脑边界区域的表达。这些基因编码转录因子En2和Brn1(Pou3f3),细胞内信号转导修饰子Sef和Tapp1,以及非编码RNA Ncrms。 Brn1基因被进一步鉴定为Pax2的直接靶标,因为启动子中和Brn1上游调节元件中的两个功能性Pax2结合位点对于在中脑边界处lacZ转基因表达至关重要。此外,显性阴性Brn1蛋白在鸡胚中的异位表达与Fgf8基因调控有关。这些数据共同定义了Pax2在独特的转录程序的建立以及中脑发育过程中细胞内信号传导控制中的新功能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号