循环节同步在INS-1细胞和小鼠群岛中差异修改了细胞因子介导的转录基因重塑和细胞死亡
Phillip Alexander Keller Andersen1, Rasmus H Reeh1, Isabel Sanders1
1Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen N, Denmark.
iScience
|May 12, 2025
概括
细胞因子对β细胞中循环时钟的破坏受到同步的影响. 同步使细胞对损伤敏感,但NF-κB抑制提供了保护,突出其在时钟调节中的作用.
科学领域:
- * * 时间生物学
- * 内分泌学 在内分泌学.
- * 分子生物学 * 分子生物学
背景情况:
- * 贝塔细胞昼夜时钟的干扰导致氧化应激和胰岛素分泌受损.
- * 众所周知,促炎性细胞因子会扰乱β细胞内核心的昼夜钟.
- * 昼夜同步状态对细胞因子介导的时钟干扰的影响尚不清楚.
研究的目的:
- * 调查β细胞昼夜时钟的细胞因子介导的干扰是否取决于昼夜同步状态.
- *阐明NF-κB信号传导在细胞系和初级小岛中调解这些效应中的作用.
- * 为了比较产生胰岛素的INS-1细胞和初级小鼠岛对不同同步条件下的细胞因子暴露的反应.
主要方法:
- *使用了生产胰岛素的INS-1细胞和初级小鼠群岛.
- *操纵细胞和小岛的昼夜同步状态.
- * 暴露于促炎性细胞因子的细胞和小岛,并评估核心钟基因/蛋白质表达,细胞毒性,NF-κB活性和节律性.
主要成果:
- *在INS-1细胞中,同步增强了细胞因子介导的钟基因表达和细胞毒性,与增加的NF-κB活性有关. 抑制NF-κB可以阻止这些效应.
- *在小鼠群岛中,细胞因子减少了核心时钟基因表达,而不考虑同步或NF-κB活性.
- *同步保护小鼠群岛免受细胞因子诱导的细胞毒性,但NF-κB抑制没有影响小岛节律性.
结论:
- *循环节同步差异调节细胞因子诱导的转录基因变化和INS-1细胞与小鼠岛屿细胞死亡.
- *NF-κB信号传递在调解细胞因子对时钟基因表达和同步INS-1细胞中的细胞毒性方面发挥着关键作用.
- *对细胞因子诱导的时钟扰动和细胞死亡的反应在贝塔细胞模型之间存在显著差异,并取决于同步和NF-κB活性.
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