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使用多重基因淘汰HeLa细胞剖析压力激活蛋白激酶 (SAPK) 信号通路

Chihiro Ito¹, Mirei Yamamoto¹, Nozomi Yokota¹

¹Faculty of Pharmacy, Department of Biochemistry, Osaka Medical and Pharmaceutical University, Takatsuki, Osaka, Japan.

The Journal of biological chemistry

|November 6, 2025

概括

这项研究产生了淘汰细胞系来剖析压力激活蛋白激酶 (SAPK) 家族的角色. 结果显示,特定的JNK和p38同型控制着不同的细胞反应,有助于了解通路.

科学领域:

细胞生物学细胞生物学
分子生物学分子生物学
信号传输信号传输

背景情况:

压力激活蛋白激酶 (SAPK) 途径涉及多个JNK和p38成员,具有潜在的重叠功能.
剖析单个SAPK异型的特定作用对于理解复杂的细胞信号网络至关重要.

研究的目的:

阐明SAPK家族成员的同型特异性和重叠功能.
研究JNK和p38同型在调节基质酸化和即时早期基因表达中的作用.

主要方法:

使用CRISPR-Cas9基因编辑生成HeLa衍生的多重淘汰 (KO) 细胞系,包括三倍,四倍,七倍和唯一幸存者 (ss) 六倍的SAPK KO细胞.
用特异性抗体进行了西部斑点分析,以评估基质酸化.
在各种压力条件下分析了直接早期基因 (c-Jun,EGR1,c-Fos) 的表达水平.

主要成果:

p38激酶主要负责酸化MAPKAPK2,MSK1,Mnk1和CREB/ATF-1,而JNK激酶则调解了c-Jun/JunD酸化.
鉴定出JNK1是c-Jun/JunD酸化的主要贡献者,而p38α是p38基质的主导激酶.
JNK1/JNK2控制了c-Jun表达,p38主要调节了EGR1和c-Fos表达,但细胞因子诱导的EGR1表达显示出独立于JNK/p38的复杂调节.

结论:

全面的多基因KO和ss-KO策略有效地解剖复杂的细胞内信号通路,其中包括多个家族成员.
SAPK同型在调节细胞对压力和刺激的反应中表现出不同的,有时重叠的作用.
需要进一步的研究才能充分理解控制SAPK介导的即时早期基因表达的复杂机制.

关键词:

克里斯普里斯卡斯在JNK中,JNK就是JNK.这就是 SAPK SAPK.基因表达的基因表达方式立即早期的基因多重复 KO KO KO 的情况.p38 MAPKK 的时间.信号传导的信号传导.

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