[Erythrocyte removal from bone marrow by density gradient separation using the COBE 2991 cell processor with the...

Area of Science:

• Hematology
• Transplantation immunology
• Bioprocessing engineering

Context:

• ABO-incompatible bone marrow transplantation necessitates efficient red blood cell depletion.
• Conventional methods using simple-bag sets with density gradient centrifugation (Ficoll-hypaque) present challenges with peristaltic pump compatibility and require multiple processing sets.
• This limits procedural efficiency and increases contamination risks.

Purpose:

• To develop and evaluate a novel triple-bag processing set for a streamlined, safer, and more efficient red blood cell depletion procedure in bone marrow transplantation.

Summary:

• A triple-bag processing set was developed integrating concentration, Ficoll-hypaque density gradient centrifugation, and post-gradient cell washing into a single procedure.
• The system incorporates peristaltic PVC tubing, reducing the need for multiple connections and minimizing microbial contamination risks.
• The triple-bag system achieved 97.9+/-1.1% red blood cell depletion and 89.6+/-8.7% CD34+ cell recovery, comparable to existing methods but with enhanced practicality and safety.

Impact:

• The triple-bag system offers a practical and simplified approach to red blood cell depletion for bone marrow transplantation.
• It enhances safety by reducing manipulation steps and potential contamination.
• This method presents a viable alternative for laboratories, particularly in regions where triple-bag systems are less commonly utilized.