Proposal for a simple and easy-to-implement protocol for three-dimensional tissue imaging that is compatible with...

Area of Science:

• Biotechnology
• Microscopy
• Histology

Background:

• Traditional tissue observation is limited to 2D due to light penetration and antibody access issues.
• Emerging 3D tissue observation methods require specialized equipment and complex protocols, hindering widespread use.
• Confocal microscopes are widely available, making them ideal for accessible 3D tissue imaging.

Purpose of the Study:

• To develop a simple, adaptable protocol for 3D tissue observation compatible with confocal microscopy.
• To facilitate the transition from 2D to 3D tissue imaging by optimizing tissue clearing and immunostaining.
• To promote broader adoption of advanced 3D tissue visualization techniques.

Main Methods:

• Investigated the impact of tissue clearing and immunostaining conditions on thin tissue slices.
• Evaluated the efficacy of CUBIC-L in enhancing immunolabeling.
• Optimized detergent concentrations and developed a two-step staining procedure.

Main Results:

• CUBIC-L effectively enhanced immunolabeling without reducing antigen immunoreactivity.
• High detergent concentrations increased the intensity of immunoreactivity.
• A two-step staining protocol was identified as suitable for the proposed method.

Conclusions:

• A simple and adaptable protocol for 3D tissue observation using tissue clearing and immunostaining has been established.
• The protocol is compatible with widely available confocal microscopes.
• This work is expected to accelerate the adoption of 3D tissue observation techniques in research.