Activity Analysis and Preliminary Inducer Screening of the Chicken DAZL Gene Promoter
作者:Lei Zhang、Rui Zhu、Qisheng Zuo、Dong Li、Chao Lian、Beibei Tang、Tianrong Xiao、Yani Zhang、Bichun Li
DOI:10.3390/ijms16036595
日期:——
This study was aimed at identifying the active control area of chicken DAZL gene core promoter, to screen optimum inducers of the DAZL gene, thus to enhance the differentiation of embryonic stem cells into spermatogonial stem cells. Fragments of chicken DAZL gene promoter were cloned into fluorescent reporter plasmids and transfected into DF-1 cells. Then Dual-Luciferase® Reporter Assay System was used to identify the activity of the DAZL gene under different inducers. Our studies showed that the DAZL core promoter region for the Suqin yellow chicken was −383 to −39 bp. The dual-luciferase® reporter showed that all-trans retinoic acid (ATRA), a retinoic acid receptor alpha agonist (tamibarotene/Am80), or estradiol (E2) could significantly enhance DAZL transcription. The in vitro inductive culture of chicken ESCs demonstrated that, with ATRA treatment, DAZL transcription peaked at 6 days and then decreased slowly; whereas, DAZL transcription was continuous and peaked at 10 days with Am80 treatment. E2 treatment significantly increased DAZL expression after 8 days. All three treatments were associated with the appearance of male germ cell (MGC)-like cells on day 10. These results provide the optimum inducer screening of the DAZL gene and lay the foundation for further screening of compounds that can induce the differentiation of ESCs into MGCs in vitro.
本研究旨在鉴定鸡DAZL基因核心启动子的活性控制区,筛选DAZL基因的最佳诱导剂,从而促进胚胎干细胞向精原干细胞的分化。将鸡 DAZL 基因启动子片段克隆到荧光报告质粒中并转染到 DF-1 细胞中。然后使用 Dual-Luciferase® Reporter Assay System 鉴定 DAZL 基因在不同诱导剂下的活性。我们的研究表明,苏沁黄鸡的DAZL核心启动子区域为-383至-39 bp。双荧光素酶®报告基因显示,全反式视黄酸 (ATRA)、视黄酸受体 α 激动剂 (他米巴罗汀/Am80) 或雌二醇 (E2) 可以显着增强 DAZL 转录。鸡ESC体外诱导培养表明,经ATRA处理后,DAZL转录在第6天达到峰值,然后缓慢下降;而 DAZL 转录是连续的,并在 Am80 处理后 10 天达到峰值。 E2处理8天后显着增加DAZL表达。所有三种处理均与第 10 天雄性生殖细胞 (MGC) 样细胞的出现相关。这些结果提供了 DAZL 基因的最佳诱导剂筛选,并为进一步筛选可诱导 ESC 分化为细胞的化合物奠定了基础。 MGC 体外。