title: Inhibition of hemopoiesis in murine marrow cell cultures by recombinant murine tumor necrosis factor alpha: evidence for long-term effects on stromal cells.
abstract: The addition of recombinant murine tumor necrosis factor alpha (rmTNF-alpha) to serum-free methylcellulose cultures inhibited macrophage colony formation stimulated by purified colony stimulating factor-1 (CSF-1), recombinant granulocyte-macrophage-CSF (rmGM-CSF), and recombinant interleukin 3 (rmIl-3). The concentration of rmTNF-alpha inhibiting colony formation by 50% (IC50) was between 2 and 20 ng/ml. Erythroid colony formation in cultures with erythropoietin (EPO) alone or EPO, rmIl-3, and rmGM-CSF in combination were reduced to a much lesser extent. In established long-term marrow cultures (LTMC), addition of 20 and 200 ng/ml of rmTNF-alpha resulted in release of cells from the adherent layer during the first week. Treatment of cultures with rmTNF-alpha for 4 consecutive weeks led to prolonged inhibition of cell production lasting up to 8 weeks after cessation of treatment. One day after addition of a low dose of TNF (2 ng/ml), "fat" cells were no longer observed in the adherent layer. Our results indicate that TNF inhibition of hemopoiesis occurs both at the progenitor cell and stromal cell levels.
authors.affiliation: Department of Cell Biology, Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland.
authors.forename: J F
authors.initials: JF
authors.lastname: Eliason
authors.forename: P
authors.initials: P
authors.lastname: Vassalli
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D003115:Colony-Stimulating Factors / Q000494:pharmacology; D006410:Hematopoiesis / Q000187:drug effects; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000187:drug effects; D007377:Interleukin-3 / Q000502:physiology; D007700:Kinetics; D051379:Mice; D008807:Mice, Inbred BALB C; D011994:Recombinant Proteins / Q000494:pharmacology; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
chemical_list: D003115:Colony-Stimulating Factors; D007377:Interleukin-3; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha