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

• 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 IgII1 (λ5) 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+ SCA1lowKITlow 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. © 2008 by The American Society of Hematology.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Hematologi (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Hematology (hsv//eng)

Nyckelord

Animals Antigens

CD19/*analysis Antigens

CD45/*analysis B-Lymphocytes/chemistry/*cytology Bone Marrow Cells *Cell Lineage Hematopoietic Stem Cells/chemistry/*cytology Humans Interleukin-2 Receptor alpha Subunit Mice Mice

Inbred C57BL Mice

Transgenic

MEDICINE

MEDICIN

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)