简介:1-(2,6-Dimethylphenoxy)-2-(3,4-dimethoxyphenylethylamino)-propanehydrochloride(DDPH)isanovelantihypertensiveagentbasedonstructuralcharacteristicsofmexiletineandverapamine.WeinvestigatedtheeffectofDDPHonvasodilatationandneuroprotectioninaratmodelofcerebralischemiainvivo,andarabbitmodelofisolatedbasilararteriesinvitro.OurresultsshowthatDDPH(10mg/kg)significantlyincreasedhippocampalbloodflowinvivoincerebralischemicrats,andexerteddose-dependentrelaxationofisolatedbasilararteriescontractedbyhistamineorKClintheinvitrorabbitmodel.DDPH(3×10–5M)alsoinhibitedhistamine-stimulatedextracellularcalciuminfluxandintracellularcalciumrelease.OurfindingssuggestthatDDPHhasavasodilativeeffectbothinvivoandinvitro,whichmediatesaneuroprotectiveeffectonischemicnervetissue.