PMID- 8254194 OWN - NLM STAT- MEDLINE DCOM- 19940112 LR - 20141120 IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 152 IP - 1 DP - 1994 Jan 1 TI - Production of IL-8 and monocyte chemotactic peptide-1 by peripheral blood monocytes. Disparate responses to phytohemagglutinin and lipopolysaccharide. PG - 241-9 AB - The temporal recruitment of leukocytes to a site of inflammation is dependent on a complex interplay of a number of soluble mediators. Recently, two families of chemotactic cytokines have been discovered. The -C-X-C-family, which includes IL-8, appears to recruit neutrophils and lymphocytes. In contrast, the -C-C-family, which includes monocyte chemotactic peptide-1 (MCP-1), appears to recruit predominantly monocytes. Monocytes, after their arrival at a site of inflammation, could further amplify the immune response by secreting IL-8 and MCP-1. We sought to define conditions under which human peripheral blood monocytes produce IL-8 and MCP-1. Using serum-free media, we found that PHA-stimulated monocytes expressed MCP-1 and IL-8 protein and mRNA in a dose-dependent manner. However, the onset of mRNA expression for MCP-1 occurred at least 3 h later than did the onset of IL-8 mRNA expression. IL-8 and MCP-1 gene expression by monocytes appeared to require de novo protein synthesis, in that cycloheximide blocked the expression of mRNA for both IL-8 and MCP-1 in PHA-stimulated cells. However, treatment of monocytes with cycloheximide resulted in the superinduction of IL-8 compared with control monocytes. Monocytes costimulated with PHA and LPS demonstrated enhanced amounts of IL-8 mRNA and protein, but sharply decreased amounts of MCP-1 mRNA and protein. The addition of serum to culture media increased both the constitutive and PHA-induced production of monocyte-derived MCP-1 and IL-8, but had no effect on the inhibition of PHA-stimulated MCP-1 production by LPS. These findings suggest that distinct pathways of activation exist for the production of monocyte-derived IL-8 and MCP-1. The differential expression of these different but related polypeptides may offer a means of control of the type of immune cells that are recruited to a site of inflammation. FAU - Liebler, J M AU - Liebler JM AD - Department of Medicine, Oregon Health Sciences University, Portland 97201-3098. FAU - Kunkel, S L AU - Kunkel SL FAU - Burdick, M D AU - Burdick MD FAU - Standiford, T J AU - Standiford TJ FAU - Rolfe, M W AU - Rolfe MW FAU - Strieter, R M AU - Strieter RM LA - eng GR - 1P50HL46487/HL/NHLBI NIH HHS/United States GR - HL02401/HL/NHLBI NIH HHS/United States GR - HL31693/HL/NHLBI NIH HHS/United States GR - etc. PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Chemokine CCL2) RN - 0 (Chemotactic Factors) RN - 0 (Interleukin-1) RN - 0 (Interleukin-8) RN - 0 (Lipopolysaccharides) RN - 0 (Phytohemagglutinins) RN - 0 (RNA, Messenger) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM MH - Base Sequence MH - Chemokine CCL2 MH - Chemotactic Factors/*biosynthesis MH - Humans MH - In Vitro Techniques MH - Interleukin-1/pharmacology MH - Interleukin-8/*biosynthesis MH - Lipopolysaccharides/pharmacology MH - Molecular Sequence Data MH - Monocytes/immunology/*metabolism MH - Phytohemagglutinins/pharmacology MH - RNA, Messenger/biosynthesis MH - Tumor Necrosis Factor-alpha/pharmacology EDAT- 1994/01/01 00:00 MHDA- 1994/01/01 00:01 CRDT- 1994/01/01 00:00 PHST- 1994/01/01 00:00 [pubmed] PHST- 1994/01/01 00:01 [medline] PHST- 1994/01/01 00:00 [entrez] PST - ppublish SO - J Immunol. 1994 Jan 1;152(1):241-9.