A Rapid Human Lung Tissue Dissociation Protocol Maximizing Cell Yield and Minimizing Cellular Stress.

Area of Science:

• Pulmonary Medicine
• Cell Biology
• Biotechnology

Background:

• The human lung contains diverse cell types, becoming more complex in disease states.
• Studying lung cells at a single-cell level requires protocols that yield viable cells with minimal molecular changes.
• Effective dissociation protocols are crucial for single-cell analysis of lung tissue.

Purpose of the Study:

• To develop and validate a rapid, high-yield single-cell dissociation protocol for human lung tissue.
• To compare the efficacy of the new collagenase-based protocol (Col-Short) against existing methods.
• To assess cell viability, marker integrity, and activation states after dissociation.

Main Methods:

• Developed a rapid collagenase-based dissociation protocol (Col-Short) for diseased human lung explants.
• Compared Col-Short with four other dissociation protocols.
• Assessed single-cell suspensions using flow cytometry, differential staining, and quantitative real-time PCR.
• Evaluated cell yield, viability, surface protein marker cleavage, and expression of activation/stress markers.

Main Results:

• The Col-Short protocol yielded the highest number of cells per gram of lung tissue.
• Cell viability was comparable to other protocols.
• Col-Short showed no observable surface protein marker cleavage.
• Lower expression of protein activation markers and stress-related transcripts was observed with Col-Short compared to other methods.

Conclusions:

• The Col-Short protocol is a rapid and effective strategy for generating high-yield single-cell suspensions from human lung tissue.
• This method preserves cell integrity and minimizes dissociation-induced artifacts, making it suitable for downstream respiratory cell biology research.