Abstract
This review describes an improved characterization of early B-lymphocyte precursors in mice and the remarkable sensitivity of the same cells to hormones. The nuclear enzyme terminal deoxynucleotidyl transferase (TdT) was used as a marker to image and characterize bone marrow cells lacking all lineage-associated markers. Most early TdT+ precursors have a distinctive density of c-kit and express the interleukin-7Rα chain, as well as flt-3/flk2, but lack CD34. An understanding of those cell surface properties made it possible to obtain highly enriched, viable cells with the potential to give rise to CD19+ lymphocytes in culture. A series of other flow cytometry and culture experiments suggested a possible differentiation sequence for these early pro-B cells. This new model was used to advantage in our studies of sex steroids. It appears that early precursors represent a hormone-sensitive control point for determining numbers of new B lymphocytes that are produced within bone marrow. We also compare and contrast these findings with B lymphopoiesis in humans.
Original language | English (US) |
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Pages (from-to) | 128-137 |
Number of pages | 10 |
Journal | Immunological Reviews |
Volume | 175 |
DOIs | |
State | Published - 2000 |
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology