title: Urinary excretion of histamine, methylhistamine (1-MeHi) and methylimidazoleacetic acid (MeImAA) in mastocytosis: comparison of new HPLC methods with other present methods.
abstract: New HPLC-methods for the determination of histamine, 1- MeHi and MeImAA in human urine were compared with methods presently at use in our laboratory, the enzymatic double-isotope assay for histamine, the DNFB-method for 1- MeHi and the semiquantitative estimation of MeImAA by thin layer chromatography (TLC). A fairly good agreement between the methods was obtained for the measurement of histamine and 1- MeHi , although there was a rather large random error probably due to poor precision of the present methods. The TLC-method for MeImAA used so far overestimated by about 20% the HPLC-values, probably due to inaccurate correction for recovery by the internal standard technique. There was found to be a strong correlation between the urinary excretion of 1- MeHi and MeImAA in mastocytosis patients and the molar ratio MeImAA /1- MeHi appeared significantly higher compared to normal controls and patients with chronic granulocytic leukemia indicating in general a more efficient histamine catabolism in mastocytosis.
mesh_terms: D000328:Adult; D000368:Aged; D002648:Child; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D006632:Histamine / Q000652:urine*; D006801:Humans; D007093:Imidazoles / Q000652:urine*; D008761:Methylhistamines / Q000652:urine*; D008875:Middle Aged; D014582:Urticaria Pigmentosa / Q000652:urine*
chemical_list: D007093:Imidazoles; D008761:Methylhistamines; C002667:methylimidazoleacetic acid; D006632:Histamine