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Sulfite induces adherence of polymorphonuclear neutrophils to immobilized fibrinogen through activation of Mac-1 beta2-integrin (CD11b/CD18). 2002

Tetsuya Shigehara, and Hideki Mitsuhashi, and Fumie Ota, and Takashi Kuroiwa, and Yoriaki Kaneko, and Kazue Ueki, and Yoshito Tsukada, and Akira Maezawa, and Yoshihisa Nojima
Third Department of Internal Medicine, Gunma University School of Medicine, Maebashi, Japan.

Sulfite is a major air pollutant which can cause respiratory tract inflammation characterized by an influx of polymorphonuclear neutrophils (PMN). We have previously shown that human PMN can produce sulfite either spontaneously or in response to stimulation with lipopolysaccharide. We now demonstrate that sulfite activates PMN to adhere to immobilized fibrinogen via the beta2-integrin Mac-1 (CD11b/CD18). Mac-1 expression is not altered by treatment with this agent. Although unaffected by pertussis toxin, sulfite-triggered PMN adhesion was abrogated by pretreating cells with the membrane-impermeant sulfhydryl reagent 5,5'-dithiobis(2-nitrobenzoic acid) (DTNB), a modifier of thiol groups on the cell surface. These results suggest that sulfite-induced PMN adhesion is dependent on a modification of thiols at the cell surface. Given its potent antioxidant and antimicrobial activities, sulfite may act as an endogenous mediator in host defense and/or inflammation.

UI MeSH Term Description Entries
D009240 N-Formylmethionine Leucyl-Phenylalanine A formylated tripeptide originally isolated from bacterial filtrates that is positively chemotactic to polymorphonuclear leucocytes, and causes them to release lysosomal enzymes and become metabolically activated. F-Met-Leu-Phe,N-Formyl-Methionyl-Leucyl-Phenylalanine,Formylmet-Leu-Phe,Formylmethionyl Peptide,Formylmethionyl-Leucyl-Phenylalanine,Formylmethionylleucylphenylalanine,N-Formylated Peptide,N-formylmethionyl-leucyl-phenylalanine,fMet-Leu-Phe,F Met Leu Phe,Formylmet Leu Phe,Formylmethionyl Leucyl Phenylalanine,Leucyl-Phenylalanine, N-Formylmethionine,N Formyl Methionyl Leucyl Phenylalanine,N Formylated Peptide,N Formylmethionine Leucyl Phenylalanine,N formylmethionyl leucyl phenylalanine,Peptide, Formylmethionyl,Peptide, N-Formylated,fMet Leu Phe
D009504 Neutrophils Granular leukocytes having a nucleus with three to five lobes connected by slender threads of chromatin, and cytoplasm containing fine inconspicuous granules and stainable by neutral dyes. LE Cells,Leukocytes, Polymorphonuclear,Polymorphonuclear Leukocytes,Polymorphonuclear Neutrophils,Neutrophil Band Cells,Band Cell, Neutrophil,Cell, LE,LE Cell,Leukocyte, Polymorphonuclear,Neutrophil,Neutrophil Band Cell,Neutrophil, Polymorphonuclear,Polymorphonuclear Leukocyte,Polymorphonuclear Neutrophil
D002448 Cell Adhesion Adherence of cells to surfaces or to other cells. Adhesion, Cell,Adhesions, Cell,Cell Adhesions
D004228 Dithionitrobenzoic Acid A standard reagent for the determination of reactive sulfhydryl groups by absorbance measurements. It is used primarily for the determination of sulfhydryl and disulfide groups in proteins. The color produced is due to the formation of a thio anion, 3-carboxyl-4-nitrothiophenolate. 5,5'-Dithiobis(2-nitrobenzoic Acid),DTNB,Ellman's Reagent,5,5'-Dithiobis(nitrobenzoate),Acid, Dithionitrobenzoic,Ellman Reagent,Ellmans Reagent,Reagent, Ellman's
D005340 Fibrinogen Plasma glycoprotein clotted by thrombin, composed of a dimer of three non-identical pairs of polypeptide chains (alpha, beta, gamma) held together by disulfide bonds. Fibrinogen clotting is a sol-gel change involving complex molecular arrangements: whereas fibrinogen is cleaved by thrombin to form polypeptides A and B, the proteolytic action of other enzymes yields different fibrinogen degradation products. Coagulation Factor I,Factor I,Blood Coagulation Factor I,gamma-Fibrinogen,Factor I, Coagulation,gamma Fibrinogen
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013447 Sulfites Inorganic salts of sulfurous acid. Sulfite,Sulfites, Inorganic,Inorganic Sulfites
D016177 Macrophage-1 Antigen An adhesion-promoting leukocyte surface membrane heterodimer. The alpha subunit consists of the CD11b ANTIGEN and the beta subunit the CD18 ANTIGEN. The antigen, which is an integrin, functions both as a receptor for complement 3 and in cell-cell and cell-substrate adhesive interactions. CR3 Receptor,Complement 3 Receptor,Integrin alphaMbeta2,Mac-1 Antigen,Receptor, Complement 3,Adhesive Receptor Mac-1,Integrin alpha(M)beta(2),Integrin alpha-M beta-2,Mac-1 Adhesive Receptor,Mac-1 Receptor,Mo1 Antigen Receptor,Mo1 Glycoprotein Receptor,Receptor, CR3,Receptor, Mo1 Antigen,Receptor, Mo1 Glycoprotein,Adhesive Receptor, Mac-1,Antigen Receptor, Mo1,Antigen, Macrophage-1,Glycoprotein Receptor, Mo1,Integrin alpha M beta 2,Mac 1 Adhesive Receptor,Mac 1 Antigen,Mac 1 Receptor,Macrophage 1 Antigen,Receptor, Mac-1 Adhesive,alpha-M beta-2, Integrin,alphaMbeta2, Integrin
D018821 CD18 Antigens Cell-surface glycoprotein beta-chains that are non-covalently linked to specific alpha-chains of the CD11 family of leukocyte-adhesion molecules (RECEPTORS, LEUKOCYTE-ADHESION). A defect in the gene encoding CD18 causes LEUKOCYTE-ADHESION DEFICIENCY SYNDROME. Antigens, CD18,Integrin beta2,CD18 Antigen,beta2 Integrin,p150,95 beta-Subunit,Integrin, beta2,beta-Subunit, p150,95,beta2, Integrin,p150,95 beta Subunit

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