打破pH代码:酸化触发SASP和细胞衰老中的炎症
1Department of Biochemistry, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga-gun, Tochigi, 321-0293, Japan.
Journal of biochemistry
|December 11, 2025
概括
由代谢变化驱动的细胞内酸化促进细胞衰老和炎症. 这项研究揭示了降低pH值如何激活与糖解相关的炎症电路,影响与年龄相关的慢性炎症.
科学领域:
- 细胞和分子生物学 细胞和分子生物学
- 代谢和衰老的作用
背景情况:
- 细胞衰老是一种与代谢变化和衰老相关的分泌表型 (SASP) 相关的稳定增长停止状态.
- 虽然已知增强的葡萄糖分解和线粒体功能障碍等代谢变化,但细胞内酸化在衰老中的作用正在出现.
- 酸化源于抑制的质子外流,增加的甘油酸生产和溶酶体问题,影响细胞过程.
研究的目的:
- 研究细胞内酸化作为细胞衰老的调节者的作用.
- 阐明将改变的细胞pH值与老化相关的分泌表型 (SASP) 联系在一起的机制.
- 探索代谢变化,细胞内pH值和衰老中的炎症信号之间的联系.
主要方法:
- 对细胞pH调节机制的分析,包括NHE1活性和溶酶体功能.
- 评估代谢变化,如糖解和葡萄糖-6-酸盐积累.
- 研究与衰老和炎症相关的基因表达,包括MondoA标 (TXNIP,ARRDC4).
主要成果:
- 由抑制的质子外流和改变的 lysosomal 功能引起的细胞内酸化被确定为衰老的关键调节者.
- 降低细胞内pH值会影响氧化还原平衡,抑制HDAC活性,并促进与衰老相关的基因转录.
- 酸化通过葡萄糖-6-酸盐积累和MondoA目标激活了与糖分分解相关的炎症电路,与SASP诱导相关.
结论:
- 细胞内pH值充当关键的代谢线索,将改变的糖解与细胞衰老中的炎症输出联系起来.
- 酸化通过特定的分子通路促进高度分泌的衰老细胞表型.
- 了解这种pH介导的途径为调节与年龄相关的慢性炎症提供了一个框架.
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