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细胞内pH差异调节正常上皮细胞中代谢和信号通路的转录
Ricardo Romero-Moreno1, Brandon J Czowski1, Lindsey Harris1
1Harper Cancer Research Institute, South Bend, Indiana, USA; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, USA.
The Journal of biological chemistry
|August 11, 2024
概括
在正常细胞中改变细胞内pH值 (pHi) 会引发广泛的基因表达变化,影响信号传递和新陈代谢. 高pHi促进癌症类代谢转变和健康细胞中的乳酸生产.
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 生物化学
背景情况:
- 细胞内pH (pHi) 动态对于正常细胞功能至关重要.
- 不调节的pHi与癌症 (高pHi) 和神经退行 (低pHi) 有关.
- 在pHi调节的细胞生物学中的分子机制仍然在很大程度上是未知的.
研究的目的:
- 研究细胞内pH动态如何影响正常人乳腺上皮细胞中的基因表达.
- 为了确定由pHi调节的特定基因和途径.
- 了解pHi驱动的转录变化对细胞信号传递和新陈代谢的功能后果.
主要方法:
- 使用了正常的人类乳腺上皮细胞模型.
- 操纵细胞内pH值 (pHi) 的水平.
- 进行了全球转录分析 (基因表达分析).
- 量化蛋白质表达和下游信号.
- 评估代谢活动,包括乳酸生产.
主要成果:
- 改变pHi诱导了显著的全球转录性变化,发现了176个不同调节的基因.
- 依赖pHi的基因在信号和糖解路径上得到了丰富.
- 标记同源1 (NOTCH1) 蛋白质表达和信号与更高的pHi.增加.
- 高pHi上调的糖分酶和pyruvate命运的调节者 (例如,乳酸脱酶,pyruvate脱酶激酶).
- 升高的pHi将正常的上皮细胞转移到糖溶性新陈代谢,增加乳酸生产.
结论:
- 细胞内pH动态通过转录来调节正常上皮细胞中的关键信号和代谢途径.
- 这些发现揭示了pHi依赖细胞过程的新型分子调节器.
- 正常细胞中的pHi增加可以驱动癌症相关信号和代谢表型的获取.
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