PMID- 11012759 OWN - NLM STAT- MEDLINE DCOM- 20001016 LR - 20190513 IS - 0019-2805 (Print) IS - 1365-2567 (Electronic) IS - 0019-2805 (Linking) VI - 101 IP - 1 DP - 2000 Sep TI - Alteration in the responsiveness to tumour necrosis factor-alpha is crucial for maximal expression of monocyte chemoattractant protein-1 in human neutrophils. PG - 97-103 AB - We previously reported delayed expression of monocyte chemoattractant protein-1 (MCP-1) in human neutrophils cultured with a cytokine-rich crude supernatant of phytohaemagglutinin-stimulated peripheral blood mononuclear cells (PHA-sup). Tumour necrosis factor-alpha (TNF-alpha) contained in the PHA-sup played a key role in this event, but there appeared to be another factor(s) in the same supernatant that co-operated with TNF-alpha for maximal MCP-1 expression. In the present study, we reduced TNF-alpha concentrations in the PHA-sup to minimal levels using anti-TNF-alpha affinity columns (TNF-depleted-sup) and investigated the co-operation between TNF-alpha and TNF-depleted-sup. Nine hours of preincubation with TNF-depleted-sup altered the responsiveness of neutrophils to TNF-alpha and enabled TNF-alpha to increase the level of MCP-1 expression to a maximal level within 4 hr. The priming effect was not due to the increased expression of cell-surface TNF receptors. However, the activation of primed cells by TNF-alpha was clearly through TNF receptor-p55. Finally, the activity in the TNF-depleted-sup that co-operated with TNF-alpha was eluted at 60 000 MW on high-performance liquid chromatography-gel filtration. Thus, delayed neutrophil expression of MCP-1 is regulated by a cytokine-dependent mechanism that induces neutrophils to enter a 'mature' stage. FAU - Yamashiro, S AU - Yamashiro S AD - Laboratory of Molecular Immunoregulation, National Cancer Institute-Frederick Cancer Research and Development Center, Frederick, MD, USA. FAU - Kamohara, H AU - Kamohara H FAU - Yoshimura, T AU - Yoshimura T LA - eng PT - Journal Article PL - England TA - Immunology JT - Immunology JID - 0374672 RN - 0 (Antigens, CD) RN - 0 (Chemokine CCL2) RN - 0 (Culture Media, Conditioned) RN - 0 (Phytohemagglutinins) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Tumor Necrosis Factor) RN - 0 (Receptors, Tumor Necrosis Factor, Type I) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM MH - Antigens, CD/immunology MH - Cell Culture Techniques MH - Chemokine CCL2/genetics/*metabolism MH - Culture Media, Conditioned MH - Dose-Response Relationship, Immunologic MH - Gene Expression Regulation MH - Humans MH - Neutrophils/*immunology MH - Phytohemagglutinins/immunology MH - RNA, Messenger/genetics MH - Receptors, Tumor Necrosis Factor/immunology MH - Receptors, Tumor Necrosis Factor, Type I MH - Tumor Necrosis Factor-alpha/*immunology PMC - PMC2327059 EDAT- 2000/09/30 11:00 MHDA- 2000/10/21 11:01 PMCR- 2001/09/01 CRDT- 2000/09/30 11:00 PHST- 2000/09/30 11:00 [pubmed] PHST- 2000/10/21 11:01 [medline] PHST- 2000/09/30 11:00 [entrez] PHST- 2001/09/01 00:00 [pmc-release] AID - imm085 [pii] AID - 10.1046/j.1365-2567.2000.00085.x [doi] PST - ppublish SO - Immunology. 2000 Sep;101(1):97-103. doi: 10.1046/j.1365-2567.2000.00085.x.