Biomaterial Database

Characterization of effect of N-formyl-methionyl-leucyl-phenylalanine on leukotriene synthesis in human polymorphonuclear leukocytes. 1985

H Salari, and P Braquet, and P Naccache, and P Borgeat

Human polymorphonuclear leukocytes (PMNLs) were exposed to N-formyl-methionyl-leucyl-phenylalanine (f-Met-Leu-Phe) in the presence or absence of exogenous arachidonic acid. Analysis of incubation mixtures by high-performance liquid chromatography showed that f-Met-Leu-Phe stimulated the synthesis of 5-hydroxy-eicosatetraenoic acid (HETE) and of leukotriene B4 (LTB4) which was rapidly metabolized into 20-OH-LTB4 and 20-COOH-LTB4. The stimulatory effect of f-Met-Leu-Phe was dose and time dependent. The tripeptide showed maximum stimulatory activity at the concentration of 1 microM and after 20-30 min of incubation. Addition of arachidonic acid to the f-Met-Leu-Phe-stimulated PMNLs resulted in an increase in the synthesis of LTB4 and 5-HETE. Pretreatment of the PMNLs with cytochalasin B strongly potentiated (up to six-fold) the stimulatory effect of f-Met-Leu-Phe on 5-lipoxygenase product synthesis, whereas cytochalasin B alone or with arachidonic acid had no significant effect. The tripeptide did not increase the synthesis of platelet-derived 12-HETE, and 12-hydroxyheptadecatrienoic acid, or of PMNL-derived 15-HETE, suggesting that its action was selective for PMNL 5-lipoxygenase. The present data indicate that f-Met-Leu-Phe causes the release of arachidonic acid from cellular lipids and activates the 5-lipoxygenase.

UI	MeSH Term	Description	Entries
D007975	Leukotriene B4	The major metabolite in neutrophil polymorphonuclear leukocytes. It stimulates polymorphonuclear cell function (degranulation, formation of oxygen-centered free radicals, arachidonic acid release, and metabolism). (From Dictionary of Prostaglandins and Related Compounds, 1990)	5,12-HETE,5,12-diHETE,LTB4,Leukotriene B,Leukotriene B-4,Leukotrienes B,5,12 HETE,5,12 diHETE,B-4, Leukotriene,Leukotriene B 4
D008084	Lipoxygenase	An enzyme of the oxidoreductase class primarily found in PLANTS. It catalyzes reactions between linoleate and other fatty acids and oxygen to form hydroperoxy-fatty acid derivatives.	Lipoxidase,Linoleate-Oxygen Oxidoreductase,Lipoxygenase-1,Lipoxygenase-2,Linoleate Oxygen Oxidoreductase,Lipoxygenase 1,Lipoxygenase 2,Oxidoreductase, Linoleate-Oxygen
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
D003571	Cytochalasin B	A cytotoxic member of the CYTOCHALASINS.	Phomin
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006893	Hydroxyeicosatetraenoic Acids	Eicosatetraenoic acids substituted in any position by one or more hydroxy groups. They are important intermediates in a series of biosynthetic processes leading from arachidonic acid to a number of biologically active compounds such as prostaglandins, thromboxanes, and leukotrienes.	HETE,Acids, Hydroxyeicosatetraenoic
D001095	Arachidonic Acids		Eicosatetraenoic Acids,Acids, Arachidonic,Acids, Eicosatetraenoic
D016718	Arachidonic Acid	An unsaturated, essential fatty acid. It is found in animal and human fat as well as in the liver, brain, and glandular organs, and is a constituent of animal phosphatides. It is formed by the synthesis from dietary linoleic acid and is a precursor in the biosynthesis of prostaglandins, thromboxanes, and leukotrienes.	(all-Z)-5,8,11,14-Eicosatetraenoic acid,Arachidonic Acid, (all-Z)-Isomer, 1-(14)C-Labeled,Arachidonic Acid, (all-Z)-isomer, 3H-Labeled,Arachidonic Acid, Ammonium Salt, (all-Z)-Isomer,Arachidonic Acid, Cerium Salt, (all-Z)-Isomer,Arachidonic Acid, Cesium Salt, (all-Z)-Isomer,Arachidonic Acid, Lithium Salt, (all-Z)-Isomer,Arachidonic Acid, Potassium Salt, (all-Z)-Isomer,Arachidonic Acid, Sodium Salt,Arachidonic Acid, Sodium Salt, (all-Z)-Isomer,Arachidonic Acid, Zinc Salt, (all-Z)-Isomer,Sodium Arachidonate,Vitamin F,Arachidonate, Sodium