Imaging Single-Vesicle Exocytosis with Total Internal Reflection Fluorescence Microscopy (TIRFM)
Yingke Xu1, Luhong Jin2, Derek Toomre3
1Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, State Key Laboratory of Modern Optical Instrumentation, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, China. yingkexu@zju.edu.cn.
Methods in Molecular Biology (Clifton, N.J.)
|July 12, 2022
Summary
Total internal reflection fluorescence microscopy (TIRFM) visualizes cell membrane dynamics. This study used TIRFM to analyze the exocytosis of glucose transporter-4 (GLUT4) vesicles in adipocytes.
Area of Science:
- Cell biology
- Microscopy techniques
- Biophysics
Background:
- Cell surface dynamics are crucial for cellular functions.
- Visualizing membrane events requires high spatiotemporal resolution.
- Glucose transporter-4 (GLUT4) vesicle trafficking is key in metabolic regulation.
Purpose of the Study:
- To demonstrate the application of TIRFM for analyzing exocytosis.
- To study the dynamics of single GLUT4 vesicles during exocytosis.
- To investigate membrane events at the cell surface with high resolution.
Main Methods:
- Total Internal Reflection Fluorescence Microscopy (TIRFM) was employed.
- Exocytosis of single GLUT4-containing vesicles was recorded.
- Data analysis focused on spatiotemporal dynamics.
Main Results:
- TIRFM enabled high-resolution visualization of GLUT4 vesicle exocytosis.
- The study successfully captured membrane dynamics at the cell surface.
- Excellent signal-to-noise ratios were achieved, facilitating detailed analysis.
Conclusions:
- TIRFM is a powerful technique for studying membrane dynamics.
- The exocytosis of GLUT4 vesicles can be precisely analyzed using TIRFM.
- This method offers superb spatiotemporal resolution for cell surface event visualization.
