A novel source of viable peripheral blood mononuclear cells from leukoreduction system chambers

• Published in: Transfusion (Philadelphia, Pa.) Vol. 46; no. 12; pp. 2083 - 2089
• Main Authors: Dietz, Allan B., Bulur, Peggy A., Emery, Richard L., Winters, Jeffrey L., Epps, Dennis E., Zubair, Abba C., Vuk-Pavlović, Stanimir
• Format: Journal Article
• Language: English
• Published: Malden, USA Blackwell Publishing Inc 01.12.2006; Blackwell Publishing
• Subjects: Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy; Biological and medical sciences; Blood. Blood and plasma substitutes. Blood products. Blood cells. Blood typing. Plasmapheresis. Apheresis; Blood. Blood coagulation. Reticuloendothelial system; Bone marrow, stem cells transplantation. Graft versus host reaction; Dendritic Cells - cytology; Enterotoxins - pharmacology; Hematopoietic Stem Cells - cytology; Humans; Immunomagnetic Separation; Leukocyte Reduction Procedures - methods; Leukocytes, Mononuclear - cytology; Lipopolysaccharide Receptors - analysis; Medical sciences; Pharmacology. Drug treatments; Transfusions. Complications. Transfusion reactions. Cell and gene therapy; Mononuclear cell; Transfusion
• ISSN: 0041-1132; 1537-2995
• DOI: 10.1111/j.1537-2995.2006.01033.x

BACKGROUND: Buffy coats are becoming less available as a source of research‐grade peripheral blood mononuclear cells (PBMNCs). Therefore, alternative sources of these cells were investigated. STUDY DESIGN AND METHODS: PBMNCs isolated from the cells retained in leukoreduction system chambers (LRSCs) and those eluted from white blood cell filters were compared. From LRSCs (1.88 ± 0.40) × 109 PBMNCs (n = 13) versus (0.43 ± 0.15) × 109 PBMNCs were isolated from leukofilter eluates (LFEs, n = 8; p < 0.0001). RESULTS: Cells from LRSCs and LFEs produced similar numbers of burst‐forming unit–erythroid, colony‐forming unit (CFU)–granulocyte‐macrophage, and CFU–granulocyte‐erythrocyte‐monocyte‐macrophage‐megakaryocyte colonies. The percentages of cells positive for CD3, CD4, CD8, CD14, CD19, and CD56 in the PBMNCs isolated from LRSCs and LFEs were indistinguishable. Cells isolated from LRSCs expressed higher levels of CD69 and CD25 in reaction to staphylococcal enterotoxin B than the cells isolated from LFEs. The source of cells affected neither the yield and purity of immunomagnetically isolated CD3+ cells, CD14+ cells, and CD56+ cells nor the function of T cells, natural killer cells, and in vitro matured dendritic cells (DCs). DC yield from LRSC‐derived CD14+ cells, however, was higher. CONCLUSION: LRSCs are a novel source of fully functional PBMNCs that can replace the more traditional sources of research‐grade cellular products.