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BR Blazar, MB Widmer, CC Soderling, S Gillis and DA Vallera
Department of Pediatrics, University of Minnesota Hospitals, Minneapolis
55455.
In vivo administration of murine recombinant granulocyte/macrophage colony
stimulating factor (rGM-CSF) was evaluated for effects on survival and
engraftment in an allogeneic murine bone marrow transplantation (BMT) model
involving T-cell depletion of donor marrow. The model provides a high
incidence of graft failure/rejection. Recipients of continuous subcutaneous
infusions of rGM-CSF had a significant survival advantage when compared
with untreated controls. However, a significantly lower incidence of donor
cell engraftment was noted. Hematological parameters were not substantially
affected. When rGM-CSF was administered intraperitoneally (IP), twice daily
injections closely approximated the effects of continuous infusion on
survival. Single IP injections were without significant effects on survival
or engraftment. These results demonstrate that prolonged frequent in vivo
exposure to rGM-CSF can significantly improve survival but significantly
decreases donor cell repopulation in recipients of T-cell- depleted
histoincompatible marrow grafts.
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| Copyright © 1988 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||