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二氧化碳诱导的细胞外pH值下降,通过通过CREB激活在人体皮肤纤维细胞中提升TGF-β1表达的调节,增强了细胞外基因组件的产生
Kei Takano1, Shinya Kasamatsu1, Mika Aoki1
1Biological Science Research, Kao Corporation, Odawara, Japan.
Experimental dermatology
|June 28, 2023
概括
使用二氧化碳 (CO2) 的轻度皮肤酸性增强皮肤纤维细胞中的细胞外基质 (ECM) 生产. 这一过程由pH值变化,CREB激活和TGF-β1介导,表明CO2可以治疗皮肤衰老和ECM损伤.
科学领域:
- 皮肤病学 皮肤病学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 通过皮肤给予二氧化碳 (CO2) 会导致轻微的皮肤酸化,改善皮肤上的诸如炎症等问题.
- 这种轻度酸度对皮肤组织,特别是细胞外基质 (ECM) 生产的影响,仍然在很大程度上未被探索.
研究的目的:
- 研究轻度酸度对正常人皮肤纤维细胞 (NHDF) 中的ECM蛋白质生产的影响和潜在机制.
- 为了确定CO2诱导的酸化是否会影响参与ECM合成的关键信号通路.
主要方法:
- 在使用二氧化碳配方重建的人体皮肤等价物 (HSEs) 中评估CO2皮肤透性和皮肤内pH值降低.
- 在pH调整的介质 (pH 6.5) 中培养的NHDF模仿酸性条件.
- 利用RNA干扰 (RNAi) 抑制CREB1和特定的G蛋白合受体 (GPCR),以及信号通路的化学抑制剂 (cAMP/PKA,PLC/PKC).
主要成果:
- 二氧化碳成功透了高质,降低了皮内pH值.
- 减少的细胞外pH激活了CREB,调高了TGF-β1表达,增加了弹性和原纤维的产生,以及NHDF中的氨酸度升高.
- 抑制CREB1和GPCRs (GPR4,GPR65) 减弱了TGF-β1上调,同时抑制cAMP/PKA和PLC/PKC通路减少了CREB的激活.
结论:
- 二氧化碳诱导的皮肤酸化促进了NHDF中ECM的产生.
- 这种效应是由TGF-β1上调调节的介导,由GPCR信号通路激活和CREB驱动.
- 对照衰老,内在衰老和ECM恶化等疾病,二氧化碳的使用是一个潜在的治疗策略.
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