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菌性调节的miRNAs调节p53的表达,并在营养缺乏下影响动物的生存
María P Gervé1, Juan A Sánchez1, María C Ingaramo1
1Instituto de Agrobiotecnología del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe, Argentina.
PLoS genetics
|August 28, 2023
概括
转录因子Myc调节Drosophila中的microRNA (miRNA) 生物发生,影响基因表达和处理. 这一发现揭示了Myc的真相.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 转录因子Myc对于细胞生长,增殖和亡至关重要,解调与人类疾病有关.
- 虽然Myc在瘤发生中的作用涉及微RNA (miRNA),但其对miRNA生物发生的精确调节尚未完全理解.
研究的目的:
- 为了研究Myc在调节Drosophila的miRNA生物发生中的作用.
- 阐明Myc如何影响miRNA基因表达和处理.
主要方法:
- 染色体免疫沉降测序 (ChIP-Seq) 用于识别miRNA基因上的dMyc结合位.
- 对dMyc耗尽对miRNA基因表达和处理因子的影响的分析 (Drosha,AGO1).
- 在体内miRNA活动传感器以评估dMyc对miRNA介导沉默的影响.
- 根据营养的可用性,dMyc对miR-305和Dmp53调节的研究.
主要成果:
- dMyc 直接与大约 56% 的 Drosophila miRNA 基因结合,影响它们的表达.
- 降低dMyc水平导致miRNA基因表达的广泛下调.
- dMyc 调节了 Drosha 和 AGO1 的水平,影响了 miRNA 处理和活性.
- 在各种组织中,dMyc促进了miRNA介导的沉默.
- 脂肪体中的依赖dMyc的miR-305调节Dmp53水平,影响营养应激反应.
结论:
- Myc是Drosophila中miRNA生物发生的重要调节者,影响基因表达和处理.
- 菌根依赖的miRNA表达起着组织特异性的作用,影响生物体对环境暗示的反应,例如营养的可用性.
- 这项研究揭示了Myc在控制miRNA路径方面的新功能,这对了解疾病有意义.
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