Qindan Capsule (芩丹胶囊) Changes Adventitial Collagen Synthesis in Spontaneously Hypertensive Rats.pdfVIP

Qindan Capsule (芩丹胶囊) Changes Adventitial Collagen Synthesis in Spontaneously Hypertensive Rats.pdf

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· 689· ORIGINALARTICLE QindanCapsule(芩丹胶囊)ChangesAdventitialCollagen SynthesisinSpontaneouSIyHypertensiveRats LVYi-jing(吕怡静)’,LIUGui-lin(刘桂林),JlXu—ming(季旭明),YUANCun-zhong(苑存忠),WANGBo(王 博)。 RENMin(任 敏)。,YANLei(闫 磊)。,WANGXu-ping(王旭平),andZHANGJi-dong(张继东)。 ABSTRACT Objective:ToinvestigatetheeffectofQindanCapsule(芩丹胶囊,QC)oncollagensynthesis andthemechanismunderlyingtheprocessinsp0ntaneouslyhypertensiverats(SHRs).Methods:Twenty· fourSHRsweredividedintothreegroups:thehypertensionmodelgroup,theQC treatmentgroup,andthe Iosartantreatmentgroup.EightWistarKyoto(WKY)ratswereusedasthenormalcontrolgroup.Thesystolic bloodpressure(SBP)oftheratswasmonitored,andthethoracicaortaadventitiaoftheratswassegregated. Theexpressionsoftransforminggrowthfactor1(TGF-B1),Smad3,andcollagensIandII1weremeasured byhistologicalstainingandmve~etranscriptionpolymerasechainreaction.Results:TheSBPwassignificantly higherinthemodelgroupthaninthenormalcontrolgroup(PO.01).However,asignificantSBP-lowering effectwasobservedinQCorIosartantreatmentgroups(PO.05orPO.01)after3weeksoftreatment.QC— treatedratsshowedadecreaseofapproximately40mm Hg,andtheIosartan-treatedratsshowedadecrease ofapproximately50mm Hgattheendoftreatmentcomparedwiththebeginningoftreatment.Theprotein andgenelevelsofTGF·131,Smad3,andcollagensIand11Iinthemodelgroupweresignificantlyincreased comparedwiththoseinthenormalcontrolgroup(PO.01).However,thelevelsweresignificantlydecreasedin theQCorIosartantreatmentgroupcomparedwiththemodelgroup(P0.05orP0.01).However,therewasno significantdifferencebetweentheQCandIosartantreatmentgroups(PO.05).Conclusions:QCcouldexertits antihypertensiveeffectthroughdown-regulatingTGF-B1一stimulatedcollagenexpressions.TheTGF-B1/Smad3 signalingpathwaymaybeinvolvedinthisprocess. KEYWORDS

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