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LTC4 was isolated and characterized from seminal fluid of seven human volunteers. A compound with a similar retention time to that of synthetic LTC4 was obtained using reverse-phase high performance liquid chromatography. The ultraviolet absorbance of the extracted substance was identical to synthet...
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Sea lice (Lepeophtheirus salmonis, Kroyer) are a major pathogen of farmed Atlantic salmon (Salmo salar). To obtain a better understanding of the host-parasite relationship protease secretions of L. salmonis into mucus collected from susceptible hosts (Atlantic salmon and rainbow trout, Oncorhynchus ...
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14th Annual Meeting of the Aquaculture Association of Canada, Quebec City, June 10-12
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1. Homogenates of garlic (Allium sativum), onions (Allium cepa) and Allium porum were in vitro incubated with [14C]arachidonic acid. 2. Separation of labelled prostaglandins and thromboxanes were accomplished by thin-layer chromatography (TLC) and the Rf values were compared with those of authentic ...
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The effects of auranofin (AF) and sodium aurothiomalate (GSTM) on the production of specific arachidonic acid metabolites by chemotactic tripeptide activated polymorphonuclear leukocytes has been investigated using radioimmunoassay techniques. AF insignificantly enhanced the production of leukotrien...
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Ovalbumin induces contraction of sensitized guinea-pig trachea, both in the presence and absence of indomethacin. Cascade superfusion bioassay was employed to detect mediator release. A prostaglandin E-like material was released in response to antigen in the absence of indomethacin but, no biologica...
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Bovine slow-reacting substance of anaphylaxis (SRS-A) is capable of producing dose-dependent vascular permeability changes in the skin of calves. The wheals are well-defined indurations, similar to wheals induced by histamine but different from those induced by prostaglandin E2 (PGE). Three proposed...
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Slow-reacting substance of anaphylaxis (SRS-A) is released immunologically from bovine lung in vitro. Various drugs known to protect calves and other animals during anaphylaxis were tested to investigate their modulation of the formation and release of SRS-A. The anti-inflammatory drugs, meclofenama...
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Isoprenaline, vasoactive intestinal peptide (VIP), prostaglandin E2 (PGE2) and forskolin caused a dose-dependent relaxation of normal and ovalbumin-sensitized guinea-pig tracheal spirals and lung parenchymal strips in vitro. There was no difference in magnitude of relaxation or sensitivity to these ...
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Study of the release of slow-reacting substance of anaphylaxis (SRS-A) from lung cells has been hampered by the lack of suitable animal model. Using both immunologic and pharmacologic stimuli, we have obtained histamine and SRS-A release from dispersed pig lung cells containing 6% mast cells (with a...
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The effects of inhibitors of the cyclooxygenase and lipoxygenase pathways of arachidonic acid (AA) metabolism were studied on the contractions of guinea pig tracheal spirals and lung parenchymal strips induced by antigen and calcium ionophore A23187. Inhibition of the cyclooxygenase pathway with ind...