Deep ultraviolet fluorescence microscopy of three-dimensional structures in the mouse brain

Area of Science:

• Neuroscience
• Microscopy
• Biophotonics

Background:

• Three-dimensional (3D) imaging at cellular resolution is vital for understanding brain architecture, function, and disease.
• Existing imaging techniques may have limitations in achieving high-resolution 3D brain mapping.

Purpose of the Study:

• To develop a wide-field fluorescent microscope utilizing deep ultraviolet (DUV) light for advanced 3D brain imaging.
• To enable detailed cytoarchitectural analysis and cell quantification in mouse brain structures.

Main Methods:

• Developed a wide-field fluorescent microscope using DUV light for optical sectioning and reduced tissue penetration.
• Integrated a microcontroller-based motorized stage for wide-field imaging of coronal brain sections.
• Combined the microscope with a vibrating microtome for serial block-face imaging of brain structures like the habenula.

Main Results:

• The DUV microscope achieved high-resolution fluorescence imaging with optical sectioning capabilities.
• Enabled detailed cytoarchitectural analysis of mouse cerebral hemispheres and quantification of cell numbers/density in the habenula.
• Demonstrated successful registration and segmentation of large-scale 3D brain data for regional cell quantification.

Conclusions:

• The novel DUV microscope provides a convenient and effective tool for large-scale 3D brain analysis in mice.
• This technology facilitates detailed structural and cellular investigations crucial for neuroscience research.