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单基因阻碍IGF2BP介导的翻译过程在弧形核中延迟青春期开始
Yifen Shen1, Le Zhang2,3, Tao Yang4
1Central Laboratory, Suzhou Bay Clinical College, Xuzhou Medical University, Suzhou Ninth People's Hospital, Soochow University, Suzhou, 215200, Jiangsu, China.
Molecular neurobiology
|September 5, 2024
概括
青春期的开始涉及翻译控制. 胰岛素样生长因子2 mRNA结合蛋白2 (IGF2BP2) 和单体调节这个过程,IGF2BP2在过度表达时延迟青春期.
科学领域:
- 神经内分泌学神经内分泌学
- 分子生物学分子生物学
- 发育生物学 发展生物学
背景情况:
- 青春期的开始是一个关键的生殖事件,由下丘脑-垂体-腺 (HPG) 轴启动.
- 翻译控制机制越来越多地被认为是它们在调节淋巴激素基因表达中的作用.
研究的目的:
- 研究蛋白质翻译和核糖体行为在青春期开始中的作用.
- 阐明调控在青春期HPG轴激活的调控机制.
主要方法:
- 在不同青春期阶段对大鼠下丘脑弧形核 (ARC) 中的转录组,单体组,多体组和蛋白质组配置的全面分析.
- 采用了RNA测序,polyribo测序,质谱学,meRIP和RIP测序.
- 在体内研究涉及侧腔室注射,以评估IGF2BP2过度表达在下丘脑的ARC.
主要成果:
- 与晚年青春期 (出生后35和45天) 相比,mRNA的单体丰富在早期青春期 (出生后25天) 显着更高.
- 单体丰富的mRNA,包括HPG轴相关的基因,在青春期早期表现出上游的开放阅读框架 (uORF) 和转化抑制.
- 发现胰岛素样生长因子2mRNA结合蛋白2 (IGF2BP2) 与青春期早期的单体-mRNA结合相互作用并促进结合.
- 在下垂体ARC中IGF2BP2的异位过度表达导致了mRNA上的单体聚合,并延迟了青春期的开始.
结论:
- 发现了一种涉及IGF2BP2和单体在青春期发作的转化控制中的新型调节机制.
- 这一发现揭示了神经内分泌调节网络对于HPG轴激活至关重要.
- 这项研究强调了转化调节在生殖发育时间表中的重要性.
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