title: Quantification of histamine in blood plasma and cell culture supernatants: a validated one-step gas chromatography-mass spectrometry method.
abstract: A novel one-step ethylchloroformate (ECF) derivatization of histamine in biological liquid matrices that allows the sensitive quantification by gas chromatography and mass spectroscopic detection (GC-MS) from small volumes of blood plasma or cell culture supernatants within 15 min is described. After addition of ECF/chloroform directly to the crude sample, histamine has been found to be quantitatively derivatized within seconds. Following centrifugation, the organic phase is transferred to a fresh vial, dried by addition of anhydrous sodium sulfate, and subjected to GC-MS analysis. The reliability of the results is verified by use of two different ion pairs for detection. The method is validated according to DIN 38402. Linearity is given from 0.0054 to 13 microg/ml and the limit of detection is 2 ng/ml (10 pg absolute, at a signal to noise ratio of 3:1). The limit of quantification, as calculated at a confidence level of 95%, is 15.6 ng/ml. Practical application is exemplified by the determination of the histamine content in blood plasma of birch pollen-sensitized mice and in the culture supernatant of rat basophil leukemia cells after Ca(2+) ionophore-mediated degranulation.
authors.affiliation: Institute of Chemistry and Biochemistry, University of Salzburg, Austria.
authors.forename: Klaus
authors.initials: K
authors.lastname: Pittertschatscher
authors.forename: Romana
authors.initials: R
authors.lastname: Hochreiter
authors.forename: Josef
authors.initials: J
authors.lastname: Thalhamer
authors.forename: Peter
authors.initials: P
authors.lastname: Hammerl
mesh_terms: D000485:Allergens / Q000008:administration & dosage; D000818:Animals; D000873:Anthracenes / Q000494:pharmacology; D015549:Basophil Degranulation Test; D001491:Basophils / Q000737:chemistry; D029662:Betula / Q000737:chemistry; D000001:Calcimycin / Q000494:pharmacology; D002118:Calcium / Q000378:metabolism; D002138:Calibration; D002478:Cells, Cultured / Q000187:drug effects / Q000378:metabolism; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006632:Histamine / Q000097:blood*; D007476:Ionophores / Q000494:pharmacology; D007938:Leukemia / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D011058:Pollen / Q000009:adverse effects; D051381:Rats; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D001619:beta-N-Acetylhexosaminidases / Q000378:metabolism
chemical_list: D000485:Allergens; D000873:Anthracenes; D007476:Ionophores; D000001:Calcimycin; C046962:9-methylanthracene; D006632:Histamine; D001619:beta-N-Acetylhexosaminidases; D002118:Calcium