Super-resolution 3D microscopy of live whole cells using structured illumination

Area of Science:

• Biophysics
• Cell Biology
• Microscopy

Background:

• Wide-field fluorescence microscopy offers limited resolution.
• Three-dimensional structured-illumination microscopy (3D SIM) enhances resolution but is typically too slow for live imaging.

Purpose of the Study:

• To adapt and apply 3D SIM for high-speed live-cell imaging.
• To achieve nanoscale resolution in dynamic cellular processes.

Main Methods:

• Application of 3D SIM to living biological samples.
• Acquisition of volumetric data at high temporal resolution (5 seconds per volume).
• Imaging of cellular structures over extended time points (>50).

Main Results:

• Achieved 120-nm lateral and 360-nm axial resolution in live cells.
• Successfully imaged dynamic events in whole cells using 3D SIM.
• Demonstrated technique on microtubules in S2 cells and mitochondria in HeLa cells.

Conclusions:

• The developed 3D SIM technique enables high-resolution live-cell imaging.
• This method overcomes previous speed limitations of 3D SIM.
• Provides a powerful tool for studying dynamic cellular structures and functions in real-time.