
Description:
Anti-histoneantibodyisanimportantimmunologicalMarkerforthediagnosisofdruginducedlupus(DIL).Althoughanti-histoneantibodiesaredetectedinapproximately30%to60%ofpatientswithsystemiclupuserythematosus(SLE),theirpresenceismuchhigherinDILpatients.Theyaredetectedinabout95%ofDILpatients,whichismoreimportantdiagnostically.DILisclinicallysimilartoSLE,exceptthattheformerpatientsdonothavekidneyorcentralnervoussysteminvolvement.Inaddition,DILpatientsdonotdemonstratethemultipletypesofantinuclearantibodies(ANAs)oftenfoundinSLEpatients.Principle:
AutoimmuneELISAkitsmeasureautoimmuneantibodiesintheserum.Itisbasedontheprincipleofasolidphaseenzyme-linkedimmunosorbentassay.Theassayutilizesaspecificantigenforimmobilizationonthemicrotiterwellsandanti-humanIgGantibodyconjugatedtohorserADIshperoxidase(HRP)fordetection.Thetestsampleisallowedtoreactsimultaneouslywiththetwocomponents,resultingin autoimmuneantibodiesbeingsandwichedbetweenthesolidphaseandenzyme-linkedantibodies.Afterincubation,thewellsarewashedtoremoveunbound-labeledantibodies.AHRPsubstrate,TMB,isaddedtoresultinthedevelopmentofabluecolor.ThecolordevelopmentisthenstoppedwiththeadditionofStopSolutionchangingthecolortoyellow.Theconcentrationofautoimmuneantibodies isdirectlyproportionaltothecolorintensityofthetestsample.Absorbanceismeasuredspectrophotometricallyat450nm.