A procedure for removing red cells and dead cells from lymphoid cell suspensions

Area of Science:

• Immunology
• Cell Biology
• Biotechnology

Background:

• Lymphoid cell suspensions are crucial for immunological research and therapies.
• Contamination with red blood cells and dead cells can compromise experimental results and cell viability.
• Existing methods for cell separation may be inefficient or damage viable cells.

Purpose of the Study:

• To develop and validate a novel, efficient method for simultaneously removing red blood cells and dead cells from lymphoid cell suspensions.
• To assess the impact of the separation technique on the viability and immunological function of lymphocytes.
• To provide a reliable protocol for obtaining high-purity, viable lymphoid cell populations.

Main Methods:

• Utilizing Isopaque/Ficoll density gradient centrifugation for cell separation.
• Centrifuging lymphoid cell populations on a specific Isopaque/Ficoll mixture.
• Analyzing cell populations for red blood cell content, dead cell percentage, and viable cell recovery.

Main Results:

• Achieved >99% depletion of red blood cells from various lymphoid cell suspensions.
• Successfully eliminated dead lymphocytes induced by mechanical stress, antibody/complement, or tissue culture.
• Demonstrated high recovery rates of viable lymphocytes (>90%) with resulting cell suspensions showing 95-100% viability.
• Confirmed that the immunological activity of B cells, helper T cells, and cytotoxic T cells remained unimpaired.

Conclusions:

• The Isopaque/Ficoll centrifugation technique offers a highly efficient and gentle method for purifying lymphoid cell suspensions.
• This procedure significantly enhances cell purity and viability, crucial for downstream immunological applications.
• The method preserves the functional integrity of key lymphocyte subsets, making it valuable for research and potential therapeutic uses.