An Optimized Method To Isolate Female Mouse Urethral Epithelium For Single-Cell And Immunofluorescence Analysis

Area of Science:

• Urology
• Immunology
• Cell Biology

Background:

• The urethra's epithelial lining and immune cells are crucial for lower urinary tract defense against pathogens.
• Understanding these cells' roles in immune surveillance and antigen presentation is vital for host defense mechanisms.
• Resident macrophages within the urethral epithelium represent a distinct subtype involved in immune functions.

Purpose of the Study:

• To provide optimized protocols for dissecting the female mouse urethra and isolating its epithelial lining.
• To enable downstream analyses of urethral epithelial cells and associated immune cells for host defense research.
• To facilitate the study of antimicrobial and immune defense roles of urethral epithelial cell types.

Main Methods:

• Optimized enzymatic and mechanical separation for isolating female mouse urethral epithelial tissue.
• Gentle enzymatic digestion to obtain high-viability single-cell suspensions of urethral epithelium and immune cells.
• Methods for flow cytometry, 3D organoid generation, and whole-mount immunostaining of urethral epithelial sheets.

Main Results:

• Established optimized methods for isolating mouse urethral epithelial cells and associated immune cells.
• Enabled high-viability single-cell suspensions for downstream molecular and cellular analyses.
• Demonstrated feasibility of generating urethral epithelial organoids and performing whole-mount immunostaining.

Conclusions:

• The described protocol provides essential tools for investigating urethral epithelial biology and immune cell interactions.
• These methods advance the study of host defense mechanisms in the lower urinary tract.
• Facilitates research into cell-specific gene signatures and functions within the urethral epithelium.