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B-lineage commitment prior to surface expression of B220 and CD19 on hematopoietic progenitor cells

Publiceringsår: 2008
Språk: Engelska
Sidor: 1048-1055
Publikation/Tidskrift/Serie: Blood
Volym: 112
Nummer: 4
Dokumenttyp: Artikel i tidskrift
Förlag: American Society of Hematology


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.


  • Hematology


  • Immunology
  • ISSN: 1528-0020

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