Abstract:
:N-Formyl peptides are cleavage products of bacterial and mitochondrial proteins that have pro-inflammatory activities and play an important role in antibacterial host defence. FcgammaRI is a receptor for the Fc portion of immunoglobulin G expressed in monocytes that mediates cytotoxicity and is upregulated by interferon-gamma (IFN-gamma) and interleukin-10 (IL-10). In this report, we demonstrate that N-formyl-methionyl-leucyl-phenylalanine (FMLP) downregulates the expression of FcgammaRI in IFN-gamma-treated monocytes, but not in IL-10-treated monocytes. We determine that supernatants obtained from monocytes treated with IFN-gamma and then exposed to FMLP induce the downregulation of FcgammaRI in naïve monocytes. This effect is abrogated by the protease inhibitors phenylmethylsulphonyl fluoride and phosphoramidon, which inhibit serine and metalloproteases, respectively. Supernatants from FMLP-treated neutrophils also induce the downregulation of FcgammaRI, when added to naïve monocytes. Similar observations were obtained in vivo in a mouse model of chronic inflammation. In vivo, FMLP also downregulates the expression of FcgammaRs in IFN-gamma-activated macrophages. Our results support the existence of a new mechanism through which FMLP could modulate the activity of monocytes/macrophages during bacterial infections.
journal_name
Scand J Immunoljournal_title
Scandinavian journal of immunologyauthors
Beigier-Bompadre M,Barrionuevo P,Alves-Rosa F,Rubel CJ,Palermo MS,Isturiz MAdoi
10.1046/j.1365-3083.2003.01219.xkeywords:
subject
Has Abstractpub_date
2003-03-01 00:00:00pages
221-8issue
3eissn
0300-9475issn
1365-3083pii
1219journal_volume
57pub_type
杂志文章abstract::alpha 2-macroglobulin (alpha 2M) preparations purified from the plasma of healthy persons and gastric carcinoma patients were further analysed by immunochemical techniques. It was found that only alpha 2M from the plasma of gastric carcinoma patients gave a positive reaction with E-receptor sheep antiserum in rocket i...
journal_title:Scandinavian journal of immunology
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doi:10.1111/j.1365-3083.1991.tb02543.x
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journal_title:Scandinavian journal of immunology
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
doi:10.1111/j.1365-3083.1987.tb02276.x
更新日期:1987-10-01 00:00:00
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journal_title:Scandinavian journal of immunology
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doi:10.1111/j.1365-3083.1980.tb00240.x
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journal_title:Scandinavian journal of immunology
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journal_title:Scandinavian journal of immunology
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journal_title:Scandinavian journal of immunology
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
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abstract::Cytokine-immunoglobulin (Ig)-fusion proteins have attracted increasing interest as antitumour agents. Here, we have investigated the antimetastatic and antitumour responses elicited in vivo by mammary adenocarcinoma cells (TS/A) engineered to secrete interleukin (IL)-2-IgG fusion proteins. TS/A cells were transfected ...
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journal_title:Scandinavian journal of immunology
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abstract::Cellular immune responses to recombinant (r) Sm14 were examined in chronic, treated patients and uninfected individuals living in an endemic area for schistosomiasis. The lymphocyte proliferative responses and cytokine profile to this antigen were evaluated. Peripheral blood mononuclear cells (PBMC) of all groups stud...
journal_title:Scandinavian journal of immunology
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doi:10.1046/j.1365-3083.2000.00710.x
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journal_title:Scandinavian journal of immunology
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
doi:10.1111/j.1365-3083.1977.tb02141.x
更新日期:1977-01-01 00:00:00
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
doi:10.1046/j.1365-3083.1999.00637.x
更新日期:1999-12-01 00:00:00
abstract::T cell precursors in the chick embryo have been localized into the intraembryonic mesenchyme (IEM) and into the para-aortic region before the first wave of the thymic colonization on embryonic day (ED) 6,5-8. The cell surface markers of avian prethymic stem cells are not known. It is also not known whether these precu...
journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
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更新日期:1995-01-01 00:00:00
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
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pub_type: 杂志文章,评审
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
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更新日期:1998-10-01 00:00:00
abstract::Heart failure (HF) is a serious disease syndrome characterized by elevated pro-inflammatory cytokines and inflammatory mediators presume to have significant contribution on disease progression. Galectins are carbohydrate-binding proteins responsible of various physiological functions. Role of galectins in heart failur...
journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
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更新日期:2020-05-01 00:00:00
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
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更新日期:2015-12-01 00:00:00
abstract::Drainage of the thoracic duct resulted in a decrease in the IgA level in rat bile, but at the same time there was an increase in both the total IgM level and the specific IgM antibody activity to Escherichia coli 06 in the bile of animals immunized in the Peyer's patches with these bacteria. The increase in total IgM ...
journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
doi:10.1111/j.1365-3083.1986.tb02178.x
更新日期:1986-11-01 00:00:00
abstract::A clear correlation was observed between the presence of an Ia-like antigenic B-cell system Ly-Li, detected serologically, and three cellular immunological techniques: [1] mixed lymphocyte reaction (MLR) inhibition by an anti-Li antiserum; [2] level of restimulation of anti-Ly-Li in-vitro-primed lymphocytes; and [3] d...
journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
doi:10.1111/j.1365-3083.1977.tb02112.x
更新日期:1977-01-01 00:00:00
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journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
doi:10.1111/j.1365-3083.1976.tb03029.x
更新日期:1976-01-01 00:00:00
abstract::Murine hepatocytes cultured in the presence of human recombinant interleukin-6 (IL-6) show increased synthesis of fibrinogen and complement component C3 by the addition of histamine. No similar effect was achieved when murine hepatocytes were treated with histamine alone or with histamine and interleukin-1 alpha toget...
journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
doi:10.1111/j.1365-3083.1992.tb02975.x
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abstract::Patients with juvenile idiopathic arthritis (JIA) have been shown to have elevated levels of circulating immune complexes (CICs) which correlated with disease activity. Our aim was to assess B cell activity by measuring the amount of and the kappa:lambda chain immunoglobulin light (L) chain ratio in CICs from JIA pati...
journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
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abstract::In a previous study we observed that after in vitro treatment with indomethacin, lymphocyte response to phytohaemagglutinin (PHA) in primary biliary cirrhosis (PBC) patients was higher than that of controls. We know that indomethacin also inhibits prostanoid production, and thus in the present work we directly measure...
journal_title:Scandinavian journal of immunology
pub_type: 杂志文章
doi:10.1111/j.1365-3083.1989.tb01222.x
更新日期:1989-09-01 00:00:00