A rapid method for preparation of urinary bladder epithelium for flow cytometric analysis

Area of Science:

• Urology
• Cell Biology
• Toxicology

Background:

• Flow cytometry is a powerful tool for cell analysis.
• Accurate preparation of urinary bladder epithelium is crucial for reliable cell cycle kinetics studies.
• Existing methods for bladder epithelium preparation can be time-consuming and may introduce artifacts.

Purpose of the Study:

• To develop a rapid and reliable method for preparing urinary bladder epithelium for flow cytometric analysis.
• To enable the measurement of cell cycle kinetics in mouse bladder epithelium.
• To assess the utility of this method in normal and toxicant-exposed animals.

Main Methods:

• A modified Vindelov's propidium iodide stain was instilled directly into the mouse urinary bladder via the urethra.
• Propidium iodide lysed epithelial cells and stained DNA in liberated nuclei.
• Stained nuclei were analyzed by flow cytometry without centrifugation or filtration.

Main Results:

• The method successfully prepared urinary bladder epithelium for flow cytometry.
• Cell cycle kinetics were measured in fetal, neonatal, and adult mouse bladder epithelium.
• The technique was effective in animals exposed to urinary bladder toxicants.
• Propidium iodide staining was confined to the epithelial layer, preventing contamination.

Conclusions:

• This novel method provides a rapid and reliable approach for urinary bladder epithelium preparation.
• The technique is suitable for cell cycle analysis in various physiological and toxicological conditions.
• The method minimizes contamination, ensuring accurate flow cytometric analysis of bladder epithelium.