@article{Brunner1991Plate-16508,
  year={1991},
  title={Platelet-activating factor induces mediator release by human basophils primed with IL-3, granulocyte-macrophage colony-stimulating factor, or IL-5},
  number={1},
  volume={147},
  journal={Journal of Immunology},
  pages={237--242},
  author={Brunner, Thomas and Weck, Alain de and Dahinden, Clemens}
}

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    <dcterms:abstract xml:lang="eng">The phospholipid platelet-activating factor (PAF) is a potent cell- derived bioactive molecule thought to be involved in diverse inflammatory processes. It has been shown that PAF can activate different leukocyte types and platelets, particularly in synergy with other agonists. In this study we examined the effect of PAF upon the release of histamine and leukotriene (LT) C4 by basophils when added alone and in combination with different agonists and cytokines. PAF by itself did neither induce histamine release nor the generation of LTC4 by basophils. However, basophils primed by the hematopoietic growth factors (hGF) IL-3, granulocyte-macrophage (GM)-CSF, or IL-5 (10 ng/ml) released preformed and de novo synthesized mediators in response to PAF at 10 to 100 nM concentrations. The extent of mediator release by hGF primed basophils in response to PAF was similar to that induced by an optimal concentration of monoclonal anti-IgE. Thus, similar to NAP-1/IL- 8 and C3a, PAF efficiently stimulates mediator release in hGF-primed basophils only. However, PAF was clearly a more potent trigger of LTC4 formation in IL-3-primed cells than NAP-1/IL-8 or C3a. When PAF was used as a second trigger, the priming effect of IL-5 was less than that of IL-3 or GM-CSF, whereas the response for other IgE-independent agonists (i.e., C5a or FMLP) was augmented equally by all three hGF. IL- 1 beta-pretreated basophils released minimal amounts of histamine in response to PAF. Neither TNF-alpha nor PAF, nor the combination thereof, was able to induce basophil mediator release. The efficiency of the different cytokines to prime for PAF responsiveness was strikingly similar to their capacity to enhance anti-IgE-induced mediator release. Similar to other IgE-independent agonists, the kinetic of mediator release in response to PAF was very rapid. PAF pretreatment of basophils did not enhance mediator release in response to diverse agonists, such as C5a and FMLP, in contrast to the capacity of PAF to augment the response of other leukocyte types to appropriate stimuli. Thus, depending on the presence of IL-3, GM-CSF, or IL-5, PAF is a potent basophil agonist capable of inducing histamine release as well as de novo synthesis of LTC4.</dcterms:abstract>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-10-27T10:33:35Z</dc:date>
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    <dc:contributor>Brunner, Thomas</dc:contributor>
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    <dcterms:issued>1991</dcterms:issued>
    <dc:creator>Dahinden, Clemens</dc:creator>
    <dcterms:title>Platelet-activating factor induces mediator release by human basophils primed with IL-3, granulocyte-macrophage colony-stimulating factor, or IL-5</dcterms:title>
    <dc:contributor>Dahinden, Clemens</dc:contributor>
    <dcterms:bibliographicCitation>Publ. in: Journal of Immunology ; 147 (1991), 1. - pp. 237-242</dcterms:bibliographicCitation>
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    <dc:creator>Brunner, Thomas</dc:creator>
    <dc:creator>Weck, Alain de</dc:creator>
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    <dc:contributor>Weck, Alain de</dc:contributor>
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