title: Interleukin 1 production by a human acute monocytic leukemia cell line.
abstract: Human interleukin 1 (IL-1) was produced under serum-free conditions by stimulating a human monocytic leukemia cell line (THP-1) with silica or lipopolysaccharide (LPS). The IL-1 from THP-1 cells has a molecular weight of 12,000-20,000, consistent with the low-molecular-weight form of IL-1 from human peripheral blood monocytes. Further characterization by isoelectrofocusing showed one major peak of activity at pI 7 for the THP-1 cell-derived IL-1. In contrast, the low-molecular-weight form of IL-1 from human monocytes has two major species, pI 5 and pI 7. This cloned THP-1 cell line produces levels of IL-1 activity comparable to those obtainable from peripheral blood monocytes. Thus THP-1 cells can serve as a valuable source of relatively homogeneous human IL-1 for further purification and molecular characterization of its role in regulating immune functions.
mesh_terms: D000818:Animals; D002460:Cell Line; D004261:DNA Replication; D006801:Humans; D007375:Interleukin-1 / Q000235:genetics* / Q000302:isolation & purification; D007948:Leukemia, Monocytic, Acute / Q000276:immunology*; D008070:Lipopolysaccharides; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology; D051379:Mice; D008815:Mice, Inbred Strains; D008970:Molecular Weight; D009000:Monocytes / Q000276:immunology; D012822:Silicon Dioxide
chemical_list: D007375:Interleukin-1; D008070:Lipopolysaccharides; D012822:Silicon Dioxide