title: Effect of recombinant human tumor necrosis factor on the colony growth of human leukemia progenitor cells and normal hematopoietic progenitor cells.
abstract: The effects of recombinant human tumor necrosis factor (rH-TNF) on the colony growth of human leukemia progenitor cells (L-CFU), granulocyte-macrophage progenitor cells (CFU-GM), and erythroid progenitor cells (BFU-E) were studied. L-CFU was assayed with leukemia cells obtained from patients with acute myelogenous leukemia. CFU-GM and BFU-E were assayed with bone marrow cells obtained from hematologically normal donors and patients with acute leukemia or non-Hodgkin's lymphoma in complete remission. A dose-dependent growth inhibition of L-CFU as well as CFU-GM and BFU-E was observed by rH-TNF at concentrations of 1 to 100 U/mL. The inhibitory effect on L-CFU was significantly greater than that on CFU-GM. No correlation was observed between the inhibitory effect on L-CFU and the number of colonies formed in the cultures without rH-TNF. Preincubation of the progenitor cells in culture medium containing 20% fetal calf serum with up to 1,000 U/mL of rH-TNF for 24 hours did not result in the inhibition of colony growth of L-CFU or CFU-GM. The inhibitory effect of rH-TNF was neutralized by an anti-rH-TNF murine monoclonal antibody.
mesh_terms: D005260:Female; D006023:Glycoproteins / Q000494:pharmacology*; D006131:Growth Inhibitors / Q000494:pharmacology*; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000187:drug effects*; D006801:Humans; D066298:In Vitro Techniques; D007938:Leukemia / Q000473:pathology*; D008297:Male; D014411:Neoplastic Stem Cells / Q000187:drug effects* / Q000473:pathology; D011994:Recombinant Proteins / Q000494:pharmacology; D014409:Tumor Necrosis Factor-alpha
chemical_list: D006023:Glycoproteins; D006131:Growth Inhibitors; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha