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- W4255772534 abstract "The proliferative responsiveness of granulocyte colony-stimulating factor (G-CSF )–mobilized blood was studied in uni-directional mixed leukocyte cultures. Unfractionated mononuclear cells from mobilized blood obtained by leukapheresis at day 4 after initiation of G-CSF (G-PBMC) were hyporesponsive (31.5% ± 9.2% response, P = .003) compared to mononuclear cells obtained from the peripheral blood before administration of G-CSF (preG-PBMC). There was great variability among donors when purified preG- and G-CD4 cells were compared. In eight of 10 donors, G-CD4 cells were equally responsive or moderately hyporesponsive; in two of 10 donors, G-CD4 cells were more strikingly hyporesponsive. CD14 cells derived from leukapheresis products (G-CD14 cells) suppressed alloantigen-induced proliferation by 48.6% ± 7.5% when added to preG-PBMC or preG-CD4 cells at responder-CD14 ratios of 2:1 (P < .001). Suppression was evident (14.4% ± 5.0%) even at responder-CD14 ratios of 8:1 and was largely contact-independent. PreG- and G-CD14 cells had equivalent potency in suppressing proliferative responses. Given that G-CSF–mobilized blood cell grafts contain 50-fold more CD14 cells and only 10-fold more T cells than marrow, we propose that suppression of donor T cells by the large proportion of monocytes present in leukapheresis products could contribute to the unexpectedly low incidence and severity of graft-versus-host disease after peripheral blood stem cell transplantation." @default.
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- W4255772534 date "1997-03-01" @default.
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- W4255772534 title "Suppression of Alloantigen-Induced T-Cell Proliferation by CD14+ Cells Derived From Granulocyte Colony-Stimulating Factor–Mobilized Peripheral Blood Mononuclear Cells" @default.
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- W4255772534 doi "https://doi.org/10.1182/blood.v89.5.1629.1629_1629_1634" @default.
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