Imaging the developing human external and internal urogenital organs with light sheet fluorescence microscopy

Area of Science:

• Developmental Biology
• Microscopy Techniques
• Human Anatomy

Background:

• Three-dimensional (3D) reconstruction advances have transformed understanding of human development.
• Light sheet fluorescence microscopy (LSFM) enables optical sectioning of cleared, immunolabeled specimens.
• LSFM facilitates high-resolution research into protein localization and tissue dynamics.

Purpose of the Study:

• To describe the application of LSFM to the developing human fetal urogenital system.
• To present a detailed technique for LSFM preparation, clearing, immunostaining, and imaging of human fetal urogenital specimens.
• To provide visual data of the developing human urogenital system using LSFM.

Main Methods:

• Application of light sheet fluorescence microscopy (LSFM) to whole-mount cleared and immunolabeled human fetal specimens.
• Detailed protocol for specimen preparation, clearing, and immunostaining.
• High-resolution imaging and video capture of fetal urogenital structures.

Main Results:

• Successful application of LSFM to visualize external genitalia, internal genitalia, and kidneys.
• Presentation of novel light sheet images and videos of the developing human urogenital system.
• Demonstration of a comprehensive LSFM method for the entire human urogenital system during embryonic and fetal periods.

Conclusions:

• LSFM is a powerful tool for studying human embryonic and fetal development at high resolution.
• This work presents the first described method for LSFM of the complete human urogenital system in embryonic and fetal stages.
• The developed technique provides unprecedented insights into the dynamics of human urogenital development.