Intracellular nanosurgery and cell enucleation using a picosecond laser

Area of Science:

• Cell Biology
• Biophysics
• Microscopy

Background:

• Living cells exhibit complex spatial and temporal organization.
• Precise manipulation of intracellular components is crucial for cell biology research.
• Laser-based nanosurgery offers a method for targeted intracellular ablation.

Purpose of the Study:

• To demonstrate the utility of picosecond laser nanosurgery for manipulating intracellular structures.
• To develop an efficient method for generating enucleated cells.
• To enable studies of the cytoskeleton and nuclear function in a nucleus-free environment.

Main Methods:

• Utilized a picosecond laser coupled to a confocal microscope for nanosurgery.
• Performed precise cutting of fluorescently labeled microtubules and mitotic spindles in fission yeast.
• Varied laser exposure times to achieve different ablation effects (photo-bleaching, partial/complete breakage).
• Developed an enucleation technique that preserves organelle distribution.

Main Results:

• Successfully demonstrated controlled cutting of microtubules and mitotic spindles.
• Achieved diverse effects including photo-bleaching and breakage by adjusting laser exposure.
• Developed an efficient method for generating enucleated fission yeast cells.
• Enucleation did not significantly perturb the distribution of other organelles.

Conclusions:

• Picosecond laser nanosurgery is effective for precise intracellular manipulation.
• The developed enucleation technique provides a tool for nucleus-free cell biology studies.
• This method facilitates research into cytoskeleton dynamics and nuclear roles in cell growth and function.