通过上调4EBP表达和抑制其酸化,20-基松抑制细胞增殖,允许昆虫幼虫变
Xiao-Pei Wang1, Ming-Zhu Ye2, Wen-Tao Tu1
1State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, China.
Insect science
|March 26, 2025
概括
昆虫激素20-hydroxyecdysone (20E) 通过控制4E结合蛋白 (4EBP) 的表达来调节变. 抑制4EBP会暂时停止细胞生长,这对于昆虫的发育至关重要.
科学领域:
- 昆虫分子生物学 昆虫分子生物学
- 发育生物学是发展生物学.
- 害虫控制研究研究害虫控制研究
背景情况:
- 细胞翻译启动因子4E结合蛋白 (4EBP) 通过结合细胞翻译启动因子4E (eIF4E) 来抑制蛋白质合成.
- 控制4EBP活动的上游监管机制,特别是在昆虫发育过程中,仍然在很大程度上没有特征.
研究的目的:
- 调查20-基乙 (20E) 在调节4EBP表达和功能的作用.
- 阐明4EBP通过哪些分子机制来影响Helicoverpa armigera中的昆虫变和发育.
主要方法:
- 在不同发育阶段对4Ebp的定量表达分析.
- 用20E进行激素治疗,以评估其对4Ebp表达和酸化的影响.
- 染色体免疫沉 (ChIP) 试验检查了ecdysone受体B (EcRB) 与4Ebp促进体的结合.
- 通过RNA干扰 (RNAi) 来降低幼虫中的4Ebp表达.
- 在昆虫表皮细胞系中进行细胞增殖测试.
主要成果:
- 在Helicoverpa armigera的第五阶段变阶段和转变过程中,4Ebp的表达显著上调.
- 20E治疗增加了4Ebp的表达,并降低了其酸化.
- 20E促进了EcRB与4Ebp促进体中的ecdysone响应元素 (EcRE) 的结合,增强了转录.
- 通过RNAi介导的4Ebp的淘汰导致异常的变.
- 过度表达4EBP抑制了H. armigera表皮细胞系中的细胞增殖.
结论:
- 20E通过调节4Ebp表达并抑制其酸化,暂时抑制了昆虫细胞的增殖.
- 这种由4EBP介导的调节对于昆虫幼虫变的过程至关重要.
- 这些发现提供了对昆虫发育的分子控制和害虫管理的潜在目标的见解.
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