title: Predominant suppression of neutrophil colony growth by recombinant human tumor necrosis factor.
abstract: To investigate the suppressive effect of recombinant human tumor necrosis factor (rH-TNF) on colony growth of human granulocyte-macrophage progenitor cells (CFU-GM), cytochemical examinations of CFU-GM colonies were performed by a triple staining method. Each colony was classified into five subtypes, and the effects of rH-TNF on each subtype were analyzed. Neutrophil colony growth was inhibited by rH-TNF in a dose-dependent manner, and it was almost completely suppressed at 100 U/ml. In contrast, no significant suppressive effect of rH-TNF was found on the growth of monocyte-macrophage and eosinophil colonies at 100 U/ml or less. When recombinant human granulocyte colony-stimulating factor which almost exclusively stimulates neutrophil colony formation was used as a source of colony-stimulating activity, the total colony growth was almost completely suppressed by 100 U/ml of rH-TNF. These results indicate predominant inhibition of neutrophil colony growth by rH-TNF.
mesh_terms: D000293:Adolescent; D000328:Adult; D002455:Cell Division / Q000187:drug effects; D003114:Colony-Forming Units Assay; D003115:Colony-Stimulating Factors / Q000494:pharmacology; D005260:Female; D006801:Humans; D008297:Male; D009504:Neutrophils / Q000166:cytology* / Q000187:drug effects; D011994:Recombinant Proteins / Q000494:pharmacology*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
chemical_list: D003115:Colony-Stimulating Factors; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha