使用基于螺旋循环化策略的pH敏感探针监测活细胞溶解体中的pH值
Xue Yu1, Dan Wang2, Mengjuan Shi2
1School of Chemistry and Life Sciences, Changchun University of Technology, Changchun 130012, China.
概括
一个新的光探测器,CBTOH,可以在生物系统中精确监测pH值. 它特别针对溶解体,检测药物诱导的pH值变化,有助于生理学研究.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 化学生物学 化学生物学
背景情况:
- 精确的pH监测对于理解生物过程至关重要.
- 现有的光探针在某些应用中可能缺乏特异性或稳定性.
- 溶解体pH值的变化是细胞健康和药物效应的重要指标.
研究的目的:
- 开发和描述一种新的pH敏感光探针,CBTOH.
- 评估CBTOH在生物系统,特别是溶酶体中的pH成像方面的性能.
- 为了证明CBTOH在监测药物诱导的pH值变化中的实用性.
主要方法:
- 对CBTOH探测器的综合和描述.
- 对pH值敏感性的螺旋循环化机制的研究.
- 在HeLa细胞和斑马鱼模型中对焦光显微镜.
- 评估探头的选择性和光稳定性.
- 监测药物诱导的溶酶体pH值变化.
主要成果:
- 通过环开放和增强的分子内电荷转移,CBTOH在酸性pH (2-3.5) 时呈现出119倍的光强度增加.
- 探测器表现出极好的光稳定性,可逆性和选择性,生物成分的干扰最小.
- 在细胞和体内模型中证实了 Lysosome 特定的向性和对酸性环境的敏感性.
- 通过CBTOH,成功地监测了溶酶体中拉巴素诱导的内源性pH值变化.
结论:
- CBTOH是一种强大的和选择性的光探针,用于精确的生物pH监测.
- 它的 lysosome-specific 向和敏感性使它成为研究细胞生理学的有价值的材料.
- CBTOH提供了一种新的方法,用于研究药物对溶酶体活性和pH平衡的影响.
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