简介:目的对猫持续性局灶性脑缺血模型加以改进,使其制作简便,模型标准、稳定,并建立功能检查模型.方法猫麻醉后,经眶后暴露大脑中动脉,在其发出外侧纹状体动脉的外侧部电凝闭塞,以医用耳脑胶及明胶海绵粘合硬膜和骨窗.在术前及术后以18FDG(18F-fluorodeoxyglucose)作示踪剂,进行PET(positronemissiontomography)检查,经计算机处理,得出各脑区的标准吸收值(thestandardizeduptakevalue,SUV)及脑结构图像.术后第7天处死动物,行TTC染色,确定梗死部位及计算体积.结果手术后在猫大脑中动脉(MCA)皮层分布区均产生梗死灶,7d后的梗死体积为(19.3±0.70)%,动物无死亡及并发症的发生;猫脑PET图像大体结构清晰,MCA闭塞后1h即可见该侧MCA皮层区放射性浓聚影明显减低,且与最后梗死区相一致.结论该模型制作方便,重复性及稳定性好,适合于脑血管疾病的功能性研究.
简介:BackgroundTheprognosticvalueofserumC-reactiveprotein(CRP)inpatientswithinfectiveendocarditis(IE)isnotwellelucidated.ThisstudyaimedtoevaluatetheusefulnessofCRPinpredictingtheoutcomeofIE.MethodsTwohundredninty-sixpatientsfrom2009to2012intheDepartmentofCardiologyatGuangdongGeneralHospitalwerescreenedanddividedintosurgicalandconventionaltreatmentgroups.CRP,whitebloodcell(WBC),erythrocytesedimentationrate(ESR)andotherclinicaldatawereobtainedwithfollow-upfor12months.ResultsTwohundredthirty-sixpatientswereassignedtoreceivesurgerytreatmentwhile60patientsreceivedconventionaltreatment.Inthesurgerygroup,thelevelofCRPinthedeathpatientswassignificantlyhigherthanthatinthesurvivalpatients(P<0.001).TheareaunderthecurveofROCwasabout0.749(SE0.064,P=0.005,95%CI,0.624-0.874)andthecut-offpointofCRPwas23.8mg/L.Inconventionalgroup,therewassignificantdifferencebetweendeathandsurvival(P<0.001).TheareaunderthecurveofROCwasabout0.701(SE0.095,P=0.032,95%CI,0.515-0.888)andthecut-offpointsofCRPwas65.6mg/L.TherewerenosignificantdifferencesinWBCandESRbetweensurgeryandconventionalgroups.ConclusionAmoreaggressivesurgicalinterventionresultsinabetteroutcomeoverconventionaltreatmentandCRPcouldbeservedasapredictivemarkerforadverseoutcomeinIEpatients.
简介:目的评估低密度脂蛋白胆固醇(LDL—C)/高密度脂蛋白胆固醇(HDL—C)比值对经皮冠脉介入(PcI)术后患者心血管事件的预测价值。方法选择急性冠脉综合征(ACS)并予前降支置入支架的患者119例,依据血浆LDL—C/HDL—C比值将患者分为3组,随访1年,评估三组患者心血管事件发生率,以及各危险因素与心血管事件发生率的关系。结果①与LDL—C/HDL—C比值较低的两组相比,比值较高组患者体重指数、女性患者百分率、吸烟人数及糖化血红蛋白、高敏C反应蛋(hs—CRP)、总胆固醇和LDL—C水平均明显升高,而HDL—C水平和他汀类药物使用率则较低(P〈0.05)。②第1组风险(HR)1.04,95%可信区间(c,)0.98-1.08,第2组HR1.16,95%C11.08-1.20,第3组HR1.27,95%C11.19~1.36(P〈0.05)。随着LDL—C/HDL—C比值的升高,PCI术后1年患者心血管事件发生率也逐渐升高(P〈0.05)。③Cox比例风险回归模型提示,LDL—C/HDL—C比值对PCI术后心血管事件风险的预测价值优于其他危险因素。结论LDL—C/HDL—C比值对PCI术后患者1年内心血管事件再发具有一定的预测价值。
简介:目的评价CHADS22及CHA2DS2-VASc评分系统在冠心病外科治疗中的意义.方法选择2006年1月至2010年1月行不停跳冠状动脉旁路移植术的768例患者,术后新发房颤患者97例.回顾患者的围术期及随访资料,应用CHADS2及CHA2DS2-VASc评分系统进行分析.结果768例患者术后新发房颤发生率12.6%,分为术后新发房颤组与非房颤组.新发房颤组与非房颤组平均年龄分别为(70.74±8.21)岁和(65.90±9.83)岁,围术期脑卒中分别为8例和9例,CHADS2评分值分别为3.20±1.26和2.13±0.94,CHA2DS2-VASc评分值分别为4.20±1.50和3.23±1.07.CHADS2和CHA2DS2-VASc评分是术后新发房颤的预测因素,与围术期脑卒中显著相关(P<0.01).结论冠心病外科治疗中应用CHADS2及CHA2DS2-VASc评分系统可预测术后新发房颤及围术期脑卒中,对冠心病术后新发房颤的抗凝及抗血小板治疗决策提供了依据,对卒中风险及预后有一定的评估价值.
简介:ObjectivesTostudythedepressiveeffectoftheantisenseoligonuceotides(ASODN)ofc-mycandproliferatingcellnuclearantigen(PCNA)ontheproliferationofVSMC.MethodsTakingtheVSMCobtainedfromrataortathoracaliscultured4~8generationasresearchobject.Theobjectsweredividedintothreegroupstocarryoutcontrolstudy:controlgroup,PCNAASODNgroupandc-mycASODNgroup.TheASODNs'workingconcentrationallwere1:50.ThedepressiveeffectofASODNonVSMCproliferationwasinvestigatedbycellcounting,MTTand3H-TdRincorporationassay;PCNAandc-mycexpressionweredetectedbyimmunohistochemicalmethodaftertransferringPCNAandc-mycASODNintoVSMC.ResultsPCNAandc-mycASODNcouldinhibittheproliferationofVSMCsignificantly,comparedwithcontrolgroup(P<0.05).②TransferringPCNAandc-mycASODNintoVSMCobtainedsuccessfully;thecorrespondinggenewasinhibitedobviously;comparedwithcontrolgroup(P<0.05).ConclusionsPCNAandc-mycmightplayaconsiderableroleintheVSMCproliferationprocess.ThecorrespondinggenecouldbedepressedsuccessfullyaftertransferringPCNAandc-mycASODNintoVSMC,andthentheproliferationofVSMCwassloweddown.Thisstudypresentedabeneficialproposalandtheoreticalfundamentforatherosclerotictreatment.
简介:Inspiteofrecentadvancesintreatmentandcontrol,theprevalenceofCVDandpulmonaryhypertension(PH)aroundtheworldhasincreasedsignificantly.Webelievethataconceptualbreakthroughisneededandnoveldrugtargetsmustbediscoveredinanattempttocontrolandtreatthem.ACE2,thenewestmemberoftherenin-angiotensinsystem(RAS),appearstoholdthispotential.Ourstudieshaveestablishedanovelconcept:abalancebetweenthevasodeleteriousaxis(ACE/AngⅡ/ATlR)andthevasoprotectiveaxis(ACE2/Ang-1-7/Mas)oftheRASiscriticalinmaintainingnormalCVfunctionsandanyimbalanceinitiatesvasculardysfunctionsleadingtocardiopulmonarydiseases.ThuswehypothesizethatACE2,whichisakeyenzymeindecreasingAngⅡandincreasingAng-1-7,wouldbeanidealforconsiderationasatherapeutictarget.Theobjectiveofmypresentationwillbetopresentevidenceinsupportofthisconcept.ThedatapresentedwilldemonstratethatoverexpressionofACE2bygeneticmeansoritsactivationbenovelACE2activatorsproteststheheartfromhypertension-andMi-inducedcardiacdamage.Also,thisstrategyisextremelyeffectiveinpreventionandreversalofPHandpulmonaryfibrosis.Astructure-baseddrugdiscoveryapproachwillbepresentedtoidentifysmallmoleculeACE2acti-vatorsandtheirpotentialinproducingbeneficialoutcomesonCVDandpulmonaryhypertensionwillbediscussed.
简介:Bothendotheliallipasegene(LIPG)584C>T(rs2000813)polymorphismandalcoholconsumptionmodulateserumlipidlevels.Buttheirinteractionsonserumlipidprofilesarenotwellknown.ThepresentstudywasundertakentodetecttheinteractionsofLIPG584C>Tpolymorphismandalcoholconsumptiononserumlipidlevels.GenotypingoftheLIPG584C>Twasperformedin763nondrinkersand520drinkersaged15-85.Interactionsbetweenthegenotypesandalcoholconsumptionwereassessedbyusingacross-productterm.Thelevelsofserumtotalcholesterol(TC),triglyceride(TG),high-densitylipoproteincholesterol(HDL-C),apolipoprotein(Apo)AI,andtheratioofApoAItoApoBwerehigherindrinkersthaninnondrinkers(P<0.01forall).Therewasnosignificantdifferenceinthegenotypicandallelicfrequenciesbetweennondrinkersanddrinkers.ThelevelsofserumTC,HDL-CandApoAIinnondrinkersweredifferentamongthethreegenotypes(P<.05-.01).ThesubjectswithCTgenotypehadhigherserumTC,HDL-CandApoAIlevelsthanthesubjectswithCCgenotype.ThelevelsofserumHDL-CandApoAIindrinkersweredifferentamongthethreegenotypes(P<.001andP<.05;respectively).TheindividualswithTTgenotypehadhigherserumHDL-CandApoAIlevelsthantheindividualswithCCandCTgenotypes.ThelevelsofTCinnondrinkerswerecorrelatedwithLIPG584C>Tallele(P<.05),whereasthelevelsofTGandHDL-CwereassociatedwithLIPG584C>Talleles(P<.05)andgenotypes(P<.05);respectively.ThepresentstudysuggeststhatthesubjectswithTTgenotypebenefitedmorefromalcoholconsumptionthanthesubjectswithCTandTTgenotypesinincreasingserumHDL-CandApoAIlevels.
简介:backgroundBonemarrowmesenchymalstemcells(BMSCs)canbeisolatedandculturedtomanypassages.However,StemcellsincludingBMSCsquicklyundergosenescenceinculture.Thecellsenescenceandmulti-directionaldifferentiationhavehamperedproducingBMSCsinquantitywiththeirundifferentiatedstate.Inthisstudywereportanaturalcompound,vitaminC(Vc),maintainsBMSCsstemproperty.MethodsHumanBMSCswereisolatedfrombonemarrowandpurifiedby1.073g/mLdensitygradientcentrifugation.50ng/mLVcwereaddedtoBMSCsfordifferenttimepoint.FlowcytometrywasusedtodetectcellsurfacemarkersofBMSCswithorwithoutVctreatment.BMSCsproliferationwasanalyzedbyMTTassay.PCR(polymerasechainreaction)andreal-timePCRwereusedfordetectingc-kit,nanog,andOct-4genesexpressionlevels.DNAmethyltransferase(Dnmt)1andDnmt3blevelswerealsodetectedbyreal-timePCR.ResultsFlowcytometryshowedthatafterVctreatmentfor6h,thesurfacemarkersofBMSCswerealmostunchanged.VcincreasedtheproliferationactivityofBMSCsfrom6hto24h.PCRshowedtheexpressionofc-kit,nanog,andoct-4geneswereobviouslyincreasedinVctreatedgroupthancontrolgroupat12h.Real-timePCRshowedthatthelevelofc-kit,nanog,andoct-4geneswereunregulatedfrom6hto12hcomparedwithcontrolgroup.VcalsoincreasedDnmt3bbutnotDnmt1geneexpression.ConclusionsOurresultsshowedVcactsatleastacceleratesBMSCsproliferationandmaintainsstemcellproperty.Inourstudy,wehighlightedamethodofimprovingthespeedofBMSCsgenerationandprovidedadditionalinsightsintothemechanisticbasisofpreventingBMSCssenescence.
简介:BackgroundInthisstudy,weaimedtoevaluatetheimpactofabnormalglucose,lipidandCystatin-ConthevirtualPvectorcharacteristics,whichhaven’tbeenreportedinpreviousstudies.Methods204ofnon-diabetesmellitus(NDM),130ofDM(type2)and39ofimpairedglucosetolerance(IGT)patientswereconsecutivelyandretrospectivelyrecruited.Weselectedaone-minutelengthofelectrocardiogramat4AMforanalysis.Afteraseriesofcalculatingalgorisms,weobtainedthevirtualplanarPvectorparameters.ResultsTherewerenosignificantdifferencesinFPV,FPA,RSPV,RSPA,HPVandHPAgroups.Afteradjustingconfoundingfactors,theregressioncoefficients(RC)wereestimatedasfollow:forFPV,femalegender(RC-0.21,P=0.02),triglyceride(RC-0.09,P<0.01),RVOT(RC0.03,P=0.02);forRSPV,femalegender(RC-0.21,P<0.01),triglyceride(RC-0.10,P<0.01),averageheartrate(RC0.01,P=0.02);forHPV,triglyceride(RC-0.08,P<0.001),LDL(RC-0.19,P<0.01),ApoB(RC0.67,P<0.01);forRSPA,Btypeofblood(RC-22.06,P=0.02),Cystatin-C(RC-72.79,P=0.02),thicknessofinterventricularseptum(RC3.70,P=0.01).Cystatin-CwassuggestedasacurerelatedtoRSPA,andthecut-offpointwas1.6mg/L.TherewerenosignificantriskfactorsassociatedwithFPAandHPA.TherewasnodifferenceinvirtualPvectoramongDM,IGTandNDMgroups.ConclusionIncreasedlevelsoflipidandCystatin-CsignificantlyimpactthecharacteristicsofvirtualPvector,whereasglucosedoesnot.Thesechangesmaycomefromahigherlowvoltageatrialareaandabnormalorientationofatrialdepolarization.