Abstract
We have dissected the role of the primary cytotoxic pathways Fas-FasL and perforin-granzyme in host-versus-graft reactions after allogeneic bone marrow transplantation. Sublethally irradiated female recipient mice deficient for FasL (B6.gld) or perforin (B6.prf-/-) were transplanted with bone marrow from B6 male donors. Donor engraftment in B6.prf-/- recipients was higher when compared with B6.gld, particularly when assessed by in vivo killing, demonstrating the importance of the perforin pathway over the Fas-FasL pathway. In the absence of both pathways, however, donor bone marrow engraftment was not fully restored identifying a role for an additional pathway(s) in the host-versus-graft response.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Bone Marrow Transplantation / immunology*
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Bone Marrow Transplantation / physiology*
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Cytotoxicity, Immunologic
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Fas Ligand Protein / genetics
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Fas Ligand Protein / metabolism*
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Female
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Gene Expression Regulation / radiation effects
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H-Y Antigen / metabolism
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Hematopoietic Stem Cell Transplantation
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Host vs Graft Reaction / genetics
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Host vs Graft Reaction / physiology*
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Male
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Mice
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Mice, Inbred C57BL
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Perforin / genetics
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Perforin / metabolism*
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Signal Transduction / genetics
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Signal Transduction / physiology*
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Spleen / cytology
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Spleen / transplantation
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fas Receptor / genetics
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fas Receptor / metabolism*
Substances
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Fas Ligand Protein
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H-Y Antigen
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fas Receptor
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Perforin