Rapid Isolation and Flow Cytometry Analysis of Murine Intestinal Immune Cells After Chemically Induced Colitis

Area of Science:

• Immunology
• Gastroenterology
• Cell Biology

Background:

• Chemically induced murine colitis models are crucial for studying intestinal homeostasis and inflammatory bowel disease (IBD).
• Understanding immune cell dynamics during gut inflammation is essential for elucidating disease mechanisms.
• Isolating viable immune cells, especially activated neutrophils and macrophages, from inflamed gut tissue is challenging due to prolonged enzymatic digestion.

Purpose of the Study:

• To develop an improved method for isolating high-yield, viable immune cells from inflamed mouse colons.
• To overcome the limitations of conventional cell isolation techniques that can compromise cell integrity and alter activation states.
• To facilitate downstream analyses of immune cell populations involved in intestinal inflammation.

Main Methods:

• Utilized a cell dissociator (Medimachine II) for rapid separation of intestinal tissue after short enzymatic digestion.
• Obtained a single-cell suspension suitable for immune cell isolation.
• Compared the new method's cell viability and yield against conventional protocols.

Main Results:

• Achieved 80%-90% cell viability, a 1.5 to 2-fold improvement over conventional methods.
• Enabled faster isolation of immune cells from inflamed mouse colons.
• Isolated cells retained their composition, phenotype, and activation state for downstream analysis.

Conclusions:

• The described protocol significantly enhances immune cell isolation from inflamed murine colons, yielding higher cell viability and quantity.
• This method provides a more reliable approach for studying immune cell populations in models of gut inflammation, such as IBD.
• The isolated cells are suitable for a wide range of analyses, including flow cytometry, gene expression profiling, and functional assays.