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Updated: May 23, 2025

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Activation of Apoptosis by Cytoplasmic Microinjection of Cytochrome c
Published on: June 29, 2011
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c-Jun调节分娩后β细胞亡和芽素信号的下游生存
bioRxiv : the preprint server for biology
|March 10, 2025
概括
转录因子c-Jun通过调解益生素信号传递,促进怀孕期间β细胞的存活. 它的调节在人类中是保留的,但在妊娠糖尿病中受到干扰.
科学领域:
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 在怀孕和产后期间,母亲的β细胞质量会有动态变化.
- 产后β细胞回归机制在很大程度上是未知的.
- c-Jun是一种转录因子,参与细胞存活和细胞亡.
研究的目的:
- 调查孕期和产后期间母亲β细胞中c-Jun的调节和功能.
- 探索益生菌信号在c-Jun表达和β细胞存活中的作用.
- 检查人类小岛的c-Jun表达及其在妊娠糖尿病中的相关性.
主要方法:
- 利用缺乏β细胞前性素受体 (PRLR) 的小鼠模型,用前性素刺激培养小岛.
- 采用TUNEL测定用于细胞亡检测和Q-PCR,西部涂抹和免疫染色用于基因/蛋白质表达分析.
- 研究了MIN6细胞中的c-Jun敲击,并分析了小鼠和人类岛屿.
主要成果:
- 鼠类β细胞c-Jun的表达仅限于妊娠晚期/产后早期,并且需要益生菌信号传递.
- 益生菌诱导c-Jun表达和MAPK/ERK信号在小鼠和人类岛屿.
- c-Jun抑制阻断了以益生素为媒介的β细胞存活率和促存活因子的上调.
- 人类小岛在怀孕期间显示了c-Jun的增加,但在妊娠糖尿病中没有这种情况.
结论:
- 在β细胞中,c-Jun通过PRLR/MAPK信号传递下游的乳原体的促生存效应进行调解.
- 在人类怀孕期间,β细胞的c-Jun调节保持不变.
- 在妊娠糖尿病中c-Jun的失调突出了其关键作用.
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