TheonlycommerciallyavailableELISAassay

IBLInternationalprovidesareliableandfastimmunoassayforthedeterminationofthemainmetaboliteofhistamine,1-methylhistamine(N-methylhistamine),invariousBIOLOGicalfluids.

Extensiveresearchhasshownthathistamine[2-(4-imidazolyl)-ethylamine]istheprinciplemediatorofmultiplebiologicalprocessesincludingneuromodulation,inflammation,gastricacidsecretionandtheregulationofimmunefunction.Itismainlystoredinthemetachromaticgranulaofmastcellsandthebasophilicleukocytes,andreleaseduponstimulation.

HistamineispredominantlymetabolizedviaN-methytransfereseto1-methylhistamine,whichisfurtherprocessedtoN-methylimidazoleaceticacid,whiletheremainderismetabolizedbydiamineoxidasetoimidazoleaceticacid(Fig.1).Theurinary1-methylhistaminelevelcorrelateswellwiththehistaminelevelsinplasmaandurine^(1,2),andismorestablethanhistamineinplasma.

Thedeterminationofurinary1-methylhistaminefindsitapplicationprimarilyinthediagnosisandmonitoringofmast-celldisorders,includingmastocytosis,anaphylaxis,andotherseveresystemicallergicreactions.

Uniquefeatures

• TheonlycommerciallyavailableELISA
• Sensitivity:urine:2.5ng/mL,plasmaandcellculture:0.13ng/mL
• CalibratedtoLC-MS/MS(Fig.2)
• Totalassaytimeisonly2hours
• Alsoapplicableforplasmaandcellculturesamples

Literature
1.HermannK.etal.Measurementandcharacterizationofhistamineandmethylhistamineinhumanurineunderhistamine-richandhistamine-poordiets.IntArchAllergyImmunol.1993;101(1):13-9.
2.BelicA.etal.Interdependenceofhistamineandmethylhistaminekinetics:modellingandsimulationapproach.ComputBiolMed.1999Nov;29(6):361-75.
3.MaintzL.etal.Histamineandhistamineintolerance.AmJClinNutr2007;85:1185–96.

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