Description | TAK-438isanovelP-CAB(potassium-competitiveacidblocker)thatreversiblyinhibitsH+/K+,ATPasewithIC50of19nM(pH6.5),controlsgastricacidsecretion.IC50value:19nM[1]Target:H+/K+ATPaseinvitro:TAK-438isapyrrolederivativewithachemicalstructurethatiscompletelydifferentfromtheP-CABsdevelopedtodate.TAK-438inhibitsgastricH+,K+-ATPaseactivityinaconcentration-dependentmanner.Underneutralconditions(pH7.5),theinhibitoryactivityofTAK-438isalmostthesameasthatunderweaklyacidicconditions(pH6.5).TAK-438doesnotinhibitNa+,K+-ATPaseactivityevenatconcentration500timeshigherthantheirIC50valuesagainstgastricH+,K+-ATPaseactivity.TAK-438inhibitsgastricH+,K+-ATPaseinaK+-competitivemannerwithKiof3nM[2].invivo:TAK-438inhibitsbasalgastricacidsecretioninadose-dependentmanner,andtheID50valueis1.26mg/kg.IntravenousadmiNISTrationofTAK-438dose-dependentlyincreasesthepHofthegastricperfusate,andtheincreaseinpHissustainedfor5hafteradministration.Atthe1mg/kgdose,thepHplateaues90minafteradministration,andthehighestpHvaluereachedis5.9[2].Inaddition,TAK-438showsapotentandlonger-lastinginhibitoryeffectonthehistamine-stimulatedgastricacidsecretioninratsanddogs.TAK-438showssignificantantisecretoryactivitythroughhighaccumulationandslowclearancefromthegastrictissue.TAK-438isunaffectedbythegastricsecretorystate,unlikePPIs[3]. |
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MolecularWeight | 461.46 | ||||||||||||
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Formula | C₂₁H₂₀FN₃O₆S | ||||||||||||
CASNo. | 1260141-27-2 | ||||||||||||
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Shipping | RoomtemperatureincontinentalUS;mayvaryelsewhere | ||||||||||||
Solvent&Solubility | 10mMinDMSO *"<1 mg/ml"="" means="" slightly="" soluble="" or="" insoluble.="" "≥"="" means="" soluble,="" but="" saturation="">1> Purity:99.97%
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