arachidonic acid/dental caries

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Talaromyces marneffei Mp1 Protein, a Novel Virulence Factor, Carries Two Arachidonic Acid-Binding Domains To Suppress Inflammatory Responses in Hosts.

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Talaromyces marneffei infection causes talaromycosis (previously known as penicilliosis), a very important opportunistic systematic mycosis in immunocompromised patients. Different virulence mechanisms in T. marneffei have been proposed and investigated. In the sera of patients with

A major role for phospholipase A2 in antigen-induced arachidonic acid release in rat mast cells.

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Cross-linking of IgE receptors by antigen stimulation leads to histamine release and arachidonic acid release in rat peritoneal mast cells. Investigators have reported a diverse distribution of [3H]arachidonate that is dependent on labelling conditions. Mast cells from rat peritoneal cavity were

The effects of drugs on leucocyte changes following the injection of antigen into the peritoneal cavities of actively sensitised rats.

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The injection of antigen into the peritoneal cavities of actively sensitised rats produced an immediate reaction characterised by an increase in concentrations in the peritoneal fluids, collected 5 min later, of extravasated dye labelled plasma proteins, histamine and slow reacting substance of

Characterizing the fatty acid binding site in the cavity of potassium channel KcsA.

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We show that interactions of fatty acids with the central cavity of potassium channel KcsA can be characterized using the fluorescence probe 11-dansylaminoundecanoic acid (Dauda). The fluorescence emission spectrum of Dauda bound to KcsA in bilayers of dioleoylphosphatidylcholine contains three

Arachidonic acid metabolism in guinea pig eosinophils: synthesis of thromboxane B2 and leukotriene B4 in response to soluble or particulate activators.

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The arachidonic acid metabolism of guinea pig eosinophils isolated from either peritoneal cavity or bronchoalveolar lavages was studied by reverse-phase high-performance liquid chromatography. The purified eosinophils (95-100%) from either source released thromboxane B2 (TxB2), luekotriene B4 (LTB4)

Lipoxygenase activities of the epithelial cells of the human buccal cavity.

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The lipoxygenase activities of cultured human buccal epithelial cells and cells taken ex vivo from the human buccal cavity were compared. Lipoxygenation by cultured cells exhibited exclusively omega-6 positional specificity. A membrane-damaging event such as freezing was required for activation. In

Effect of drugs on the increase in cell numbers in the peritoneal cavity of the actively sensitised mouse after intraperitoneal challenge with antigen.

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The injection of antigen into the peritoneal cavity of actively sensitised mice produced an increase in the number of neutrophils in peritoneal washings collected 4 h later but after 1 day the numbers had returned to control levels. The increase in numbers of mononuclear cells and eosinophils in the

Crystal structure of a lipoxygenase in complex with substrate: the arachidonic acid-binding site of 8R-lipoxygenase.

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Lipoxygenases (LOX) play critical roles in mammalian biology in the generation of potent lipid mediators of the inflammatory response; consequently, they are targets for the development of isoform-specific inhibitors. The regio- and stereo-specificity of the oxygenation of polyunsaturated fatty

[The correlation between the derivatives of the arachidonic acid cascade and oral pathology. A review of the literature].

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The effects of several metabolites deriving from the arachidonic acid cascade on oral tissues are reviewed. These include the effects on the pulp, tissues and gingiva, and on the development of radicular cysts and epithelial tumours of the oral cavity.

Transformation of arachidonic acid by rabbit polymorphonuclear leukocytes. Formation of a novel dihydroxyeicosatetraenoic acid.

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A new metabolite of arachidonic acid, 5-D-(S),12-D-(R)-dihydroxy-6,8,10,14-eicosatetraenoic acid, was found upon incubation of the fatty acid with a suspension of rabbit peritoneal polymorphonuclear leukocytes collected 4 h after injection of glycogen into the peritoneal cavity. The yield of the

Mechanism of polymorphonuclear leukocytes accumulation examined using inhibitors of complement and arachidonic acid cascade in rats treated with OK-432.

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When the streptococcal preparation OK-432 was intraperitoneally injected for the treatment of carcinomatous peritonitis, antitumor polymorphonuclear leukocytes (PMNs) accumulated in the peritoneal cavity. We examined the mechanism of this PMN accumulation using an in vivo system in rats. FUT-175,

Analysis of the stimulative effect of thapsigargin, a non-TPA-type tumour promoter, on arachidonic acid metabolism in rat peritoneal macrophages.

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1. At concentrations above 10 ng ml-1, the tumour promoter thapsigargin stimulates the release of radioactivity from [3H]-arachidonic acid-labelled macrophages harvested from rat peritoneal cavity. 2. The release of radioactivity from prelabelled macrophages was augmented more than additively when

Adipocyte lipid-binding protein complexed with arachidonic acid. Titration calorimetry and X-ray crystallographic studies.

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The association of the adipocyte lipid-binding protein (ALBP) with arachidonic acid (all cis, 20:4 delta 5,8,11,14) and oleic acid (cis, 18:1 delta 9) has been examined by titration calorimentry. In addition, the crystal structure of ALBP with bound arachidonic acid has also been obtained.

Carrageenan-stimulated release of arachidonic acid and of lactate dehydrogenase from rat pleural cells.

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Cells isolated from the rat pleural cavity consist mainly of macrophages, mast cells, eosinophils, and lymphocytes. Isolated pleural cells labeled with [14C]arachidonic acid released appreciable amounts (approximately 12%) of radiolabel upon exposure to pharmacological concentrations of carrageenan

Human mononuclear phagocytes from different anatomical sites differ in their capacity to metabolize arachidonic acid.

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Human mononuclear phagocytes have the capacity to metabolize arachidonic acid (AA) into prostaglandins (PG) endowed with potent activities in immune responses and inflammatory processes. We have evaluated AA metabolism in human mononuclear phagocytes harvested from different anatomical sites (blood

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