title: Comparison of radioimmunoassay and high-resolution gas chromatography mass spectrometry for the quantitative determination of serum thromboxane B2 and 6-keto-PGF1 alpha after pharmacological blockade of thromboxane synthetase.
abstract: Radioimmunoassay (RIA) and high-resolution gas chromatography-mass spectrometry (HRGC-MS) were compared for the determination of serum 6-keto-PGF-1 alpha and TXB2 in a situation of drug-altered arachidonate metabolism. Results were comparable for TXB2 in both conditions. 6-keto-PGF1 alpha RIA determinations (with two different antisera) revealed increased levels in dazoxiben-treated samples, which were not confirmed by HRGC-MS. The assay were repeatedly checked in controlled conditions to investigate these discrepancies. Interference was found with both antisera, due to the drug-induced change in metabolism.
mesh_terms: D015121:6-Ketoprostaglandin F1 alpha / Q000097:blood*; D016718:Arachidonic Acid; D001095:Arachidonic Acids / Q000097:blood; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology; D066298:In Vitro Techniques; D010088:Oxidoreductases / Q000037:antagonists & inhibitors*; D011863:Radioimmunoassay; D013929:Thromboxane B2 / Q000097:blood*; D013930:Thromboxane-A Synthase / Q000037:antagonists & inhibitors*; D013931:Thromboxanes / Q000097:blood*
chemical_list: D001095:Arachidonic Acids; D007093:Imidazoles; D013931:Thromboxanes; C029166:dazoxiben; D016718:Arachidonic Acid; D013929:Thromboxane B2; D015121:6-Ketoprostaglandin F1 alpha; D010088:Oxidoreductases; D013930:Thromboxane-A Synthase