In vitro differentiation of B lymphocytes from pre-B cells - PubMed (original) (raw)
. 1979 Apr;122(4):1273-7.
- PMID: 312835
In vitro differentiation of B lymphocytes from pre-B cells
C Y Lau et al. J Immunol. 1979 Apr.
Abstract
Adult bone marrow contains both B lymphocytes and their immediate precursors, pre-B cells. These two cells differ in size and can be separated by velocity sedimentation; B cells are enriched in the subpopulation of cells sedimenting at between 2.0 and 3.5 mm/hr and pre-B cells in the subpopulation between 5.0 and 7.0 mm/hr. Incubation of pre-B cells in vitro for 4 or 5 days leads to their differentiation into functional B lymphocytes. The transition form pre-B to B appears to occur in two steps. The first step gives mitogen responsive B cells with an intermediate sedimentation velocity and the second step produces typical small, slowly sedimenting B cells. Pre-B cells can be quantified by using a limiting dilution assay and occur at a frequency of 1/60 in the subpopulation of rapidly sedimenting bone marrow cells.
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