简介:Objective:Photoacoustic(PA)tomography(PAT)hasattractedextensiveinterestbecauseofitsopticalabsorptioncontrastandultrasonicdetection.ThisstudyaimstodevelopabiocompatibleandbiodegradablePAcontrastagentparticularlypromisingforclinicalapplicationsinhumanbody.Methods:Inthisstudy,wepresentedaPAcontrastagent:1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethyleneglycol)](DSPE-PEG)-coatedsuperparamagneticironoxide(SPIO)nanoparticles(NPs)loadedwithindocyaninegreen(ICG).WeusedICGandSPIONPsbecausebothdrugsareapprovedbytheU.S.FoodandDrugAdministration.Giventhestrongabsorptionofnear-infraredlaserpulses,SPIO@DSPE-PEG/ICGNPswithauniformdiameterof~28nmcouldsignificantlyenhancePAsignals.Results:WedemonstratedthecontrastenhancementoftheseNPsinphantomandanimalexperiments,inwhichtheinvivocirculationtimeofSPIO@DSPE-PEG/ICGNPswasconsiderablylongerthanthatoffreeICG.ThesenovelNPsalsodisplayedahighefficiencyoftumortargeting.Conclusions:SPIO@DSPE-PEG/ICGNPsarepromisingPATcontrastagentsforclinicalapplications.
简介:BACKGROUND:GenetherapyforParkinson'sdiseaseisbeingexploredasaneffectivestrategytorestoreandprotectthefunctionofneuronalcellsinthesubstantianigra.Regulationofgeneexpressionisnecessaryforgenetherapytoavoidadverseeffectsduetoexcessivesynthesisoftransgeneproducts.OBJECTIVE:Herewedevelopedrecombinantadeno-associatedvirus(AAV)asaviralvector-mediatedgeneregulationsystembasedonCrerecombinasefusedtothemutatedligand-bindingdomainoftheestrogenreceptor(CreERT2)+inducingagenttamoxifen.InducibleCrerecombinasewasusedtoreducetyrosinehydroxylasegeneexpressionandtopreventtheexcessiveincreaseindopamine.DESIGN,TIMEANDSETTING:Ageneticengineeringinvitrocomparativestudyandrandomizedcontrolledanimalexperiment.ThisstudywasconductedattheGeneTherapyCenter,JichiMedicalSchool,JapanfromJune2002toJune2004.METHODS:ToconstructarecombinantAAVvectorcarryingadopaminesynthasegene.ThetyrosinehydroxylasegenewasinsertedusingaloxPfragmentthatcouldberegulatedbyCrerecombinase.TherecombinantAAVvectorcarryingtheCreERT2genewasco-transducedwithHEK293cellsandthecorpusstriatuminaratmodelofParkinson'sdisease,withinducingagenttamoxifentoregulategeneexpression.MAINOUTCOMEMEASURES:ThelevelsofdopamineandaromaticL-aminoaciddecarboxylase(AADC)activityweredetectedinHEK293cellmediumandinthecorpusstriatuminaratmodelofParkinson'sdiseaseusinghigh-performanceliquidchromatography.ImmunofluorescencedoublestainingwasusedtoobservetyrosinehydroxylaseandCreorAADCco-expressioninHEK293cellmedium.ImmunohistochemicalstainingwasemployedtoobservetyrosinehydroxylaseandAADCexpressionandbehavioralchangesweremeasuredinParkinson'srats.RESULTS:TransfectedAAV-CreERT2andAAVexpressingdopaminesynthesisenzymescouldincreasethesynthesisofdopamineinHEK293mediumandParkinson'sratstriatum(P<0.01)andimprovetherotationalbehaviorofParkin
简介:蒋欣泉,博士、主任医师、教授、博士研究生导师。现任上海交通大学口腔医学院副院长,口腔医学系主任,上海交通大学医学院附属第九人民医院口腔修复科主任,上海高校口腔先进技术与材料工程研究中心主任。系教育部长江学者“特聘教授”,国家杰出青年基金获得者,“万人计划”领军人才,“百千万人才工程”国家级人选,“十三五”国家重点研发计划首席科学家,上海交通大学特聘教授,澳大利亚悉尼大学(工程与信息技术学院)名誉教授。目前担任国际口腔医师学院(ICD)Fellow,国际口腔修复学会(ICP)理事,中华口腔医学会口腔修复学专委会副主任委员,口腔生物医学专委会副主委,口腔医学科研管理专委会副主委。长期从事口腔颌面组织再生与修复的研究与转化工作。主持“十三五”国家重点研发计划、国家重大科学研究计划“973”课题、国家自然科学基金委重点国际(地区)合作研究项目、国家自然科学基金等项目20余项,发表SCI收录第一/通讯论文94篇。
简介:摘要她有过无数个代号——塞纳河的无名少女、塞纳河的蒙娜·丽莎、复苏安妮,以及世界接吻最多的少女。她的生平无人知晓,但死后却成为急救培训模型,挽救了许多人的生命。接受过心肺复苏术(CPR)培训的人都亲吻过她,但是又有多少人真正关注到这幅天使面孔背后的故事呢?