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- W4248946275 abstract "Purified human transferrin, when saturated with iron or zinc, decreased the production of granulocyte-macrophage colony-stimulating factors (GM- CSF) by human T lymphocytes that had been stimulated by phytohemagglutin or concanavalin-A. The iron-saturated transferrin was more active than the zinc-saturated transferrin. This effect was not seen for copper-saturated transferrin or for apotransferrin, and the inhibitory effect was seen whether production of GM-CSF occurred in the absence or presence of serum. If the lymphocytes were pretreated with monoclonal antibody against transferrin receptors, no suppressive effect with transferrin was seen. Transferrin did not have a direct effect on the granulocyte-macrophage colony or cluster-forming cells (CFU-GM) or on preformed GM-CSF. Transferrin-inhibitory activity was produced and released only from a subpopulation of T lymphocytes that had the OKT8+ antigenic phenotype. Release of this activity from OKT8+ lymphocytes, into culture medium at 37 degrees C, was first detected after 6–17 hr, but the capacity of the GM-CSF-producing lymphocytes to respond to transferrin-inhibitory activity was apparent only within the first 3 hr of placing the lymphocytes at 37 degrees C. These studies demonstrate feedback interactions confined to cells of the T-lymphocyte lineage that may be of relevance to the regulation of myelopoiesis." @default.
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- W4248946275 date "1983-07-01" @default.
- W4248946275 modified "2023-10-16" @default.
- W4248946275 title "Transferrin, derived from an OKT8-positive subpopulation of T lymphocytes, suppresses the production of granulocyte-macrophage colony- stimulatory factors from mitogen-activated T lymphocytes" @default.
- W4248946275 doi "https://doi.org/10.1182/blood.v62.1.37.bloodjournal62137" @default.
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