B-lineage commitment prior to surface expression of B220 and CD19 on hematopoietic progenitor cells
Author
Summary, in English
Commitment of hematopoietic progenitor cells to B-lymphoid cell fate has been suggested to coincide with the development of PAX5-expressing B220(+)CD19(+) pro-B cells. We have used a transgenic reporter mouse, expressing human CD25 under the control of the B-lineage-restricted Igll1 (lambda 5) promoter to investigate the lineage potential of early progenitor cells in the bone marrow. This strategy allowed us to identify a reporter expressing LIN-B220(-)CD19(-)CD127(+)FLT3(+) SCA1(low)KIT(low) population that displays a lack of myeloid and a 90% reduction in in vitro T-cell potential compared with its reporter-negative counterpart. Gene expression analysis demonstrated that these lineage-restricted cells express B-lineage-associated genes to levels comparable with that observed in pro-B cells. These data suggest that B-lineage commitment can occur before the expression of B220 and CD19.
Department/s
- Stem Cell Center
- Immunology
Publishing year
2008
Language
English
Pages
1048-1055
Publication/Series
Blood
Volume
112
Issue
4
Document type
Journal article
Publisher
American Society of Hematology
Topic
- Hematology
Status
Published
Research group
- Immunology
ISBN/ISSN/Other
- ISSN: 1528-0020