简介：Inthepresentstudy,aseriesofnovelnitricoxide-hydrogensulfidereleasingderivativesof(S)-3-n-butylphthalide((S)-NBP)weredesigned,synthesized,andevaluatedaspotentialantiplateletagents.CompoundNOSH-NBP-5displayedthestrongestactivityininhibitingthearachidonicacid(AA)-andadenosinediphosphate(ADP)-inducedplateletaggregationinvitro,with3.8-and7.0-foldmoreeffectivenessthan(S)-NBP,respectively.Furthermore,NOSH-NBP-5couldreleasemoderatelevelsofNOandH2S,whichwouldbebeneficialinimprovingcardiovascularandcerebralcirculation.Moreover,NOSH-NBP-5couldrelease(S)-NBPwhenincubatedwithratbrainhomogenate.Inconclusion,thesefindingsmayprovidenewinsightsintothedevelopmentofnovelantiplateletagentsforthetreatmentofthrombosis-relatedischemicstroke.

简介：目的：观察甘草次酸对哮喘大鼠气道炎症、气道重塑及肺组织Casepase-3、Bax、Bcl-2表达的影响,探讨其抗哮喘机制。方法：将60只雄性大鼠随机分为正常对照组、哮喘模型组、地塞米松组及甘草次酸（200、100、50mg/kg）剂量组。以卵清蛋白加氢氧化铝致敏复制大鼠哮喘动物模型,病理观察甘草次酸对哮喘大鼠肺组织气道炎症浸润和气道重塑的影响;采用RT-PCR和Western-blot法检测哮喘大鼠肺组织Casepase-3、Bax及Bcl-2mRNA和蛋白表达。结果：与哮喘模型组比较,甘草次酸200mg/kg可减少哮喘大鼠肺组织炎症浸润,改善或逆转气道重塑;甘草次酸200、100mg/kg可上调哮喘大鼠肺组织Bax、Caspase-3mRNA和蛋白表达水平,下调Bcl-2mRNA和蛋白表达水平。结论：甘草次酸对哮喘大鼠气道炎症及气道重塑有较好的改善作用,其机制可能与上调促凋亡因子Bax、Caspase-3和下调抗凋亡因子Bcl-2有关。