Description:
RANTESisachemotacticproteinforTcells,eosinophils,andbasophils.RANTESisproducedbycirculatingT-cells.ThesynthesisofRANTESisinducedbyTNF-alphaandIL1-alpha.Itplaysanactiveroleinrecruitingleukocytesintoinflammatorysites.WiththehelpofparticularcytokinesthatarereleasedbyTcells,Rantesalsoinducestheproliferationandactivationofcertainnatural-killer(NK)cellstoformCC-Chemokine-activatedkillercells.ItisalsoanHIV-suppressivefactorreleasedfromCD8+Tcells.RANTESincreasestheadherenceofmonocytestoendothelialcells.Principle:
TheELISAisbasedontheprincipleofasolidphaseenzyme-linkedimmunosorbentassay.Theassayutilizesamouseanti-humancytokineantibodyforimmobilizationonthemicrotiterwellsandgoatanti-humancytokineantibodiesalongwithstreptavidinconjugatedtohorserADIshperoxidase(HRP)fordetection.Thetestsampleisallowedtoreactsimultaneouslywiththetwoantibodies,resultinginthemoleculesofthecytokinebeingsandwichedbetweenthesolidphaseandenzyme-linkedantibodies.Afterincubation,thewellsarewashedtoremoveunbound-labeledantibodies.AHRPsubstrate,TMB,isaddedtoresultinthedevelopmentofabluecolor.ThecolordevelopmentisthenstoppedwiththeadditionofStopSolutionchangingthecolortoyellow.Theconcentrationofthecytokineisdirectlyproportionaltothecolorintensityofthetestsample.Absorbanceismeasuredspectrophotometricallyat450nm. |
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