一个温和的调色板的等离子体膜染料
Jing Ling1,2, Yitong Liu1,2, Alexandre Dumoulin3,4
1Peking-Tsinghua Center for Life Science, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China.
概括
新的PK Mem染料显著降低了光毒性,并提高了等离子体膜成像的光稳定性. 这些先进的光探测器可以进行超长期活细胞成像和细胞动态的超分辨率显微镜.
科学领域:
- 细胞生物学 细胞生物学
- 显微镜的使用方法
- 生物化学 生物化学
背景情况:
- 血膜 (PM) 污染对于观察膜结构和行为至关重要.
- 现有的颗粒斑在长时间的光显微镜中可能会造成光动力学损伤,从而限制了动态研究.
- 需要改进的染料,这些染料在活细胞成像中具有光稳定性和少毒性.
研究的目的:
- 引入新的PK Mem染料,用于对血膜进行先进的时间延迟光成像.
- 与现有的膜染料相比,提高光稳定性和降低光毒性.
- 在各种细胞类型和条件下实现细胞动态的高分辨率成像.
主要方法:
- 开发PK Mem染料,通过将三重状态火器纳入Membright酸染料中,并使用zwitterion.
- 在2D和3D成像中测试活体和固定癌细胞系和原始细胞的染料性能.
- 用超分辨率技术 (STED/SIM) 和体内成像技术评估染料的兼容性.
主要成果:
- PK Mem染料显示光毒性减少了三倍,光稳定性增加了四倍以上.
- 成功成像各种细胞类型,包括神经元,心肌细胞和精子细胞.
- 启用了细胞迁移和轴突生长动力学等细胞过程的超长期记录.
- 已证明与STED/SIM成像用于细胞事件的纳米分辨率的兼容性.
结论:
- PK Mem染料为时间缩短和超分辨率显微镜中等离子体膜染色提供了优越,温和的替代方案.
- 这些染料有助于研究以前被光毒性限制的动态细胞过程.
- 增强的光稳定性和降低的毒性为长期活细胞成像和纳米尺度研究开辟了新的途径.
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