Optimized Whole-Mount Fluorescence Staining Protocol for Pulmonary Toxicity Evaluation Using Mouse Respiratory...

Area of Science:

• Toxicology
• Cell Biology
• Respiratory Medicine

Background:

• Assessing respiratory epithelial toxicity is crucial for drug development and environmental health.
• Existing methods for evaluating toxicity can be time-consuming and complex.
• There is a need for rapid, reliable methods to assess toxicity in the respiratory tract.

Purpose of the Study:

• To develop and validate a straightforward whole-mount imaging protocol for rapid assessment of respiratory epithelial toxicity.
• To utilize fluorescence imaging and readily available reagents for evaluating substance toxicity.
• To determine the utility of the protocol for detecting and quantifying toxicity and differential cell-type susceptibility.

Main Methods:

• A whole-mount approach using mouse trachea and fluorescence imaging.
• Application of off-the-shelf reagents for staining ciliated cells (acetylated tubulin), epithelial structure (phalloidin), and cell viability (live/dead staining).
• Comparison of treated trachea samples with control samples to identify signs of toxicity.

Main Results:

• Control trachea exhibited normal cobblestone epithelial structure, high ciliated cell density, and minimal cell death.
• Substance-induced injury resulted in disrupted epithelial architecture and increased cell death.
• The protocol successfully visualized and quantified toxicity indicators.

Conclusions:

• The developed whole-mount protocol provides a rapid and effective method for evaluating respiratory epithelial toxicity.
• This technique is valuable for screening substances and understanding differential cell-type susceptibility to toxicants.
• The approach offers a straightforward and accessible tool for toxicological studies of the respiratory system.