title: Separation of immunoreactive lymphocytes from human pluripotent stem cells (CFU-GEMM) by means of counterflow centrifugation.
abstract: Counterflow centrifugation with continuous monitoring of the output for cell number and cell scatter was used to separate low density (d less than 1.070 g/ml) human bone marrow cells in two fractions: one containing the majority of small size lymphocytes and the other the majority of the larger sized committed progenitor cells. The recovery of the pluripotent stem cells (CFU-GEMM) in the large cell fraction was complete. The mitogenic reactivity of this putative stem cell fraction had decreased to 6% and 11%, of the original value as measured with phytohemagglutinin stimulation and one way mixed lymphocytic culture respectively. Counterflow centrifugation offers a physical separation technique, by which the majority of the immunoreactive cells can be separated from the pluripotent hematopoietic stem cells.
mesh_terms: D001854:Bone Marrow Cells; D002469:Cell Separation; D002478:Cells, Cultured; D002498:Centrifugation / Q000379:methods*; D006801:Humans; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D008214:Lymphocytes / Q000166:cytology / Q000276:immunology*; D013234:Stem Cells / Q000166:cytology*