PMID- 8904877 OWN - NLM STAT- MEDLINE DCOM- 19961224 LR - 20190705 IS - 0007-1048 (Print) IS - 0007-1048 (Linking) VI - 95 IP - 2 DP - 1996 Nov TI - Inhibition of tissue factor surface expression in human peripheral blood monocytes exposed to cytokines. PG - 249-57 AB - Interleukin (IL)-4, IL-10, IL-13 and transforming growth factor beta (TGF-beta) are known to regulate several monocyte functions, including inhibition of the synthesis of different cytokines. Using quantitative RT-PCR and flow cytometry analysis we investigated the effects of these cytokines on bacterial lipopolysaccharide (LPS)-induced tissue factor (TF) expression in human monocytes. The effects of IL-4 and IL-10 on monocyte chemoattractant protein-1 (MCP-1)-and C-reactive protein (CRP)-induced TF expression were also studied. A direct comparison revealed that IL-4, IL-10 and IL-13 all down-regulated LPS-induced TF expression in a concentration-dependent manner without the need for priming. In contrast, TGF-beta required 4 h of priming to inhibit TF expression induced by LPS. IL-10 was the most powerful inhibitor, causing almost complete inhibition at 5 ng/ml. IL-4 and IL-13 exhibited a significantly lower inhibitory capacity even at concentrations of 100 ng/ml. IL-4 and IL-10 showed similar concentration-dependent inhibition of MCP-1- and CRP-induced TF expression. We also showed that the regulatory effect of the interleukins occurred at the mRNA level. In vivo, these inhibitory cytokines may play an important regulatory role in preventing thrombosis. IL-10, in particular, may be a possible candidate as a TF-preventing drug. FAU - Ernofsson, M AU - Ernofsson M AD - Department of Clinical Chemistry, University Hospital, Uppsala, Sweden. FAU - Tenno, T AU - Tenno T FAU - Siegbahn, A AU - Siegbahn A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Br J Haematol JT - British journal of haematology JID - 0372544 RN - 0 (Interleukin-13) RN - 0 (Lipopolysaccharides) RN - 0 (RNA, Messenger) RN - 0 (Transforming Growth Factor beta) RN - 130068-27-8 (Interleukin-10) RN - 207137-56-2 (Interleukin-4) RN - 9007-41-4 (C-Reactive Protein) RN - 9035-58-9 (Thromboplastin) SB - IM MH - C-Reactive Protein/pharmacology MH - Humans MH - Interleukin-10/*pharmacology MH - Interleukin-13/*pharmacology MH - Interleukin-4/*pharmacology MH - Lipopolysaccharides/pharmacology MH - Monocytes/metabolism MH - Polymerase Chain Reaction MH - RNA, Messenger/metabolism MH - Thromboplastin/*antagonists & inhibitors MH - Transforming Growth Factor beta/*pharmacology EDAT- 1996/11/01 00:00 MHDA- 1996/11/01 00:01 CRDT- 1996/11/01 00:00 PHST- 1996/11/01 00:00 [pubmed] PHST- 1996/11/01 00:01 [medline] PHST- 1996/11/01 00:00 [entrez] AID - 10.1046/j.1365-2141.1996.d01-1893.x [doi] PST - ppublish SO - Br J Haematol. 1996 Nov;95(2):249-57. doi: 10.1046/j.1365-2141.1996.d01-1893.x.