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Gata4 Regulates Testis Expression of Dmrt1

机译:Gata4调节睾丸Dmrt1的表达。

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The doublesex and mab-3 related transcription factor 1 (Dmrt1) is a putative transcriptional regulator that is expressed exclusively in the gonads and is required for postnatal testis differentiation. Here we describe the transcriptional mechanisms regulating testis-specific expression of the Dmrt1 gene. Transient-transfection analysis identified a region of the promoter between kb ?3.2 and ?2.8 that is important for Sertoli cell-specific expression. DNase I footprinting revealed four sites of DNA-protein interaction within this region, three of which were prominent in primary Sertoli cells. Analysis of these sites, using electrophoretic mobility shift assays, revealed that Gata4 and another unknown factor bound within these regions. Further transient-transfection assays of various mutant promoters established the functional relevance of the Gata4-response and unknown factor-response elements, while studies of Dmrt1 expression in 13.5 days postcoitum Fog2 null gonads supported the in vivo importance of Gata4's regulation. As a whole, these studies identify Gata4 as an important regulator in the Dmrt1 transcriptional machinery that is responsible for robust expression of Dmrt1 in the testis.
机译: doublesex mab-3 相关转录因子1(Dmrt1)是假定的转录调节因子,仅在性腺中表达,是产后睾丸分化所必需的。在这里,我们描述了调节 Dmrt1 基因睾丸特异性表达的转录机制。瞬时转染分析确定了启动子的一个区域,位于kb 3.2和2.8之间,对Sertoli细胞特异性表达很重要。 DNase I足迹显示该区域内DNA-蛋白质相互作用的四个位点,其中三个在原代支持细胞中突出。使用电泳迁移率变动分析对这些位点的分析显示,Gata4和另一个未知因子结合在这些区域内。进一步的各种突变启动子的瞬时转染试验确定了Gata4应答和未知因子应答元件的功能相关性,而在Coitum Fog2 无效性腺中13.5天Dmrt1表达的研究支持了Gat4应答在体内的重要性。 Gata4的规定。总体而言,这些研究确定Gata4是Dmrt1转录机制中的重要调控因子,该机制负责 Dmrt1 在睾丸中的稳定表达。

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