CustomerValidation
- •AmJPhysiolCellPhysiol.2017Sep13:ajpcell.00006.2017.
Description | AprotininisaserineproteaseinhibitorisolatedfrombovinelungwhichinhibitstrypsinandchymotrypsinwithKivaluesof0.06pMand9nM,respectively. |
---|---|
IC50&Target | Ki:0.06pM(Trypsin),9nM(Chymotrypsin)[1] |
InVitro | Aprotinin,aserineproteaseinhibitorisolatedfrombovinelung,isacomplexproteaseinhibitorthatisanantifibrinolytic,inhibitscontactactivation,anddecreasestheinflammatoryresponsetocardiopulmonarybypass[2].Aprotinininhibitstrypsin(bovine,Ki=0.06pM),chymotrypsin(bovine,Ki=9nM),plasmin(human,0.23nM)[1].AprotininisalsoacompetitiveproteininhibitorofNOSactivity.ItinhibitsNOS-IandNOS-IIwithKivaluesof50μMand78μM,respectively[3].AprotininsignificantlyinhibitsfibrinolysiswithanIC50of0.16±0.05μM[4]. |
InVivo | Highdoseaprotinincanreducebloodlossandtransfusionrequirementsassociatedwithprimarycardiacproceduressuchascoronaryarterybypassgraft(CABG)orheartvalvereplacementsurgery[5].Aprotinininhibitsthrombusformationinadose-dependentmanner.Aprotininatadoseof1.5mgkg-1(bolus)and3mgkg-1h-1infusion(maintenanceinfusion)causesatendencytowardsareductioninbleedingtime.Aprotininsignificantlyreducesthebleedingtimestartingatadoseof3mgkg-1bolusplus6mgkg-1h-1showingareductionofapproximately84%±2.9%.Atthehighestdoseof5mgkg-1and10mgkg-1h-1,thestrongesteffectsareobserved[4].Aprotininmayaffecttumornecrosisfactor-alpha(TNF)levels.SolubleTNFRIlevelsaresignificantlyincreasedfollowingI/RintheaprotinintreatedwildtypemiceandnotdetectedinallTNFRInullmice[6]. |
ClinicalTrial | ViewMoreCollapse |
References |
|
AnimalAdmiNISTration [4][6] | Rat:MaleWistarrats(180-220g)areusedinthestudy.Aprotininisdissolvedinphysiologicalsaline.Aprotininisadministeredbybolusinjectionfollowedbyamaintenanceinfusion.Thedosesgivenare1.5mgkg-1and3mgkg-1h-1,3mgkg-1and6mgkg-1h-1upto5mgkg-1and10mgkg-1h-1.Plasmaconcentrationsforthetwoagentsareassessedbypharmacokineticstudiesinrats[4]. Mouse:Anintactmousemodelofischemia/reperfusion(30min-I/60min-R)isusedandleftventricularpeak+dP/dtismeasuredinwildtypemice(WT,C57BL/6;n=10),WTmicewithaprotinin(4mL/kg;n=10),transgenicmicedevoidoftheTNFRI(TNFRInull;n=10),andTNFRInullwithaprotinin(n=10)[6]. MCEhasnotindependentlyconfirmedtheaccuracyofthesemethods.Theyareforreferenceonly.References |
|
---|