斯芬哥辛基因酶2调节亚里尔碳化合物受体核转移和目标基因激活
Shigetoshi Yokoyama1, Imhoi Koo1, Daisuke Aibara2
1Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, 16802, USA.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 29, 2024
概括
斯芬哥辛激酶2 (SPHK2) 与酸受体 (AHR) 相互作用,促进其进入核并增强基因表达. 这揭示了SPHK2在AHR信号传递和脂代谢中的新型调节作用.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 脂对细胞代谢和调节至关重要.
- 基碳化合物受体 (AHR) 是一种已知调节胺合成基因的转录因子.
- 斯芬戈基因酶2 (SPHK2) 产生斯芬戈-1-酸盐 (S1P),其在AHR调节中的作用以前是未知的.
研究的目的:
- 为了研究氨酸激酶2 (SPHK2) 和氨酸碳化合物受体 (AHR) 之间的相互作用.
- 阐明SPHK2在AHR核定位和基因激活中的作用.
- 探索SPHK2-AHR相互作用对基因表达和脂代谢的功能后果.
主要方法:
- 同传染研究和突变发生,以分析SPHK2-AHR相互作用和核定位.
- 基因沉默和过度表达实验,以评估SPHK2对AHR活性和基因表达 (CYP1A1) 的影响.
- 染色体免疫沉 (ChIP) 用于确定SPHK2在CYP1A1促进体上的丰富.
- 用小鼠模型来验证体内发现的结果.
主要成果:
- SPHK2通过LXXLL动机与AHR相互作用,影响AHR的核定位.
- SPHK2突变或缺陷影响了AHR核转位及其向基因CYP1A1的表达.
- 过度表达SPHK2增强了AHR活性,并且发现SPHK2在CYP1A1促进器上.
- 斯芬哥辛-1-酸盐 (S1P) 治疗增加了AHR表达和促进器招募.
- 在小鼠模型中,AHR缺陷破坏了SPHK2核转位.
结论:
- SPHK2在促进AHR核定位和活动方面发挥着至关重要的作用.
- 在核中的AHR和SPHK2之间存在一种新的正反循环,调节基因表达.
- 这些发现揭示了一种新的调节机制,涉及SPHK2在AHR信号传递和细胞代谢中的作用.
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