PMID: 8613641Mar 1, 1996Paper

Human basophil/mast cell releasability. XI. Heterogeneity of the effects of contrast media on mediator release

The Journal of Allergy and Clinical Immunology
C StellatoGianni Marone

Abstract

The activation of basophils and mast cells plays a role in the pathogenesis of anaphylactoid reactions occurring during the administration of iodinated radiocontrast media. We compared the effects of three contrast media (CM), Hexabrix (sodium and meglumine salts of ioxaglic acid), Telebrix (sodium and meglumine salts of ioxitalamic acid), and Optiray (ioversol) on the release of preformed (histamine and tryptase) and de novo synthesized (prostaglandin D2 and leukotriene C4) mediators from human basophils and mast cells isolated from lung, skin, and heart tissue. The commercial preparations were evaluated in parallel with the pure substances. Mannitol was used as a positive control inducing histamine release (HR) by hyperosmolar stimulation. Hexabrix (0.1 to 0.3 mol/L), Telebrix (0.1 to 0.5 mol/L), Optiray (0.2 to 0.5 mol/L), and the corresponding pure substances concentration-dependently induced HR from basophils. A positive correlation was found between CM osmolality and HR from basophils. Mast cells isolated from different anatomic sites responded differently to the three CM. Hexabrix and Optiray induced histamine and tryptase release from human lung mast cells, but not from human skin mast cells. No correlation was found be...Continue Reading

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