简介:AIM:Toinvestigatetheeffectsofhydrogen-richsaline(HRS)onmicrogliaactivationandSirtuintype1(Sirt1)inratswithN-methyl-N-nitrosourea(MNU)-inducedretinitispigmentosa(RP).METHODS:Ratsweredividedintonorm(N)group,model(M)groupandHRS(H)group.RatsinMandHgroupsweregivensalineandHRSrespectivelypriortoandafteradministrationofMNU.Atoneday(d1)andd3afterwards,electroretinogramandhistologicalexaminationwereperformedtoconfirmtheeffectsofHRSonretinalfunctionandstructureofMNU-inducedRP.Immunofluorescencestainingofanti-ionizedcalcium-bindingadaptermolecule1(Iba1),amakerofmicrogliacells,wasperformed,withquantitativereal-timepolymerasechainreaction(qRT-PCR)foritsmRNAquantification.Moreover,Sirt1mRNAandproteinexpressionintheretinasweredetectedbyWesternblotandqRT-PCR.RESULTS:HRSpreservedtheretinalfunctionandmitigatedthereductionofphotoreceptordegenerationinMNU-treatedretinas.ThepresenceofmicrogliacellswassomewhatmoreobviousinHgroupthanthatinMgroupatd1.HRSsuppressedthefurtheractivationofmicrogliacells,withthenumberofmicrogliacellslessthanthatofMgroupatd3.ResultsofqRT-PCRofIba1wereconsistentwiththoseofimmunofluorescencestaining,withthemRNAexpressionofIba1inHgroupmoreintensivethanthatofMgroupatd1(P<0.05),whilelessthanthatofMgroupatd3(P<0.05).Furthermore,theSirt1mRNAandproteinexpressiondecreasedafterMNUadministration,whileHRSmitigatedtheMNU-induceddownregulationofSirt1.CONCLUSION:HRScaneffectivelykeepmicrogliaactivationinducedbyMNUtoanappropriateextent,whileupregulateSirt1inMNU-inducedRP.
简介:目的:了解我国Leber遗传性视神经病变(Leber'shereditaryopticneuropathy,LHON)线粒体DNA(mtDNA)14484位点突变患者的发病率和临床特征.方法:对来自117个家系的119例临床确诊或疑诊LHON的患者进行mtDNA检测.对3例证实为14484位点突变的家系做深入调查并收集相关病史及临床资料,抽取15例家属的血样进行mtDNA检测.结果:存在线粒体DNA突变的62例(62/119,52.1%)中,14484位点突变仅3例(4.8%).该3例3个家系56例中,28例有眼部症状,外显率50%.发病经过和临床表现类似11778位点突变的LHON,但其中视力恢复者17例(60.7%).15例家属的血样检测再次证实为14484位点突变.结论:我国LHON患者中14484位点突变者少见,其临床表现与11778位点突变者相似,惟视力恢复率高.
简介:AIM:Tostudyclinicalfeaturesandgenemutationswithinthepaired-likehomeodomaintranscriptionfactor2(PITX2)geneinapedigreeofbilaterallimbaldermoids.METHODS:Completeeyeexaminationshavebeenperformedoneachindividualofthefamily.Exonsofpaired-likehomeodomaintranscriptionfactor2(PITX2)wereamplifiedbypolymerasechainreaction,sequenced,andcomparedwithareferencedatabase.RESULTS:Wedescribedthephenotype,clinicfindingsinafamilywithtwoaffectedmembers.Themassesoftheproband’seyeswereexcisedsurgicallydemonstratingadermoidcystbyhistopathologicalexamination.NomutationwasdetectedinthegenePITX2inthispedigree.CONCLUSION:Afamilyoflimbaldermoidcystwasreported.Inaddition,nopathogenicsequencevariationswerefoundinPITX2,indicatingthatthisphenotypeinthisfamilyisadistinctiveentity.
简介:AIM:Tofindouttheoutcomeoflaserphotocoagulationinclinicallysignificantmacularedema(CSME)byopticalcoherencetomography(OCT).·METHODS:Itwasaprospective,non-controlled,caseseriesstudyenrolling81eyesof64patientswithCSMEbetweenAugust2008andJanuary2010.AllpatientsreceivedmodifiedgridphotocoagulationwithfrequencydoubledNd:YAGlaser.Eachpatientwasevaluatedintermsofbest-correctedvisualacuity(BCVA)andregressionorprogressionofmaculopathyafterlasertherapyat1,3and6months.Spearman’scorrelationtestwasusedtoshowthecorrelationbetweenBCVAandtotalmacularvolume(TMV).Analysisofvariance(ANOVA)wasusedtocompareamonggroupsandindependentt-testwasusedtocompareineachgroup.·RESULTS:ThereishighcorrelationbetweenBCVAandTMV(P≤0.001).BCVAimprovedin50.6%,remainedstaticin39.5%anddeterioratedin9.9%patientsafter6monthoftreatment.TheBaselineTMV(meanandSD)were9.26±1.83,10.4±2.38,11.5±3.05,8.89±0.75and9.47±1.98mm3fordifferentOCTpatterns,ST(spongelikethickening),CMO(cystoidmacularedema),SFD(subfovealdetachment),VMIA(Vitreomacularinterfaceabnormality)andaverageTMVrespectively(P=0.04).After6monthsoflasertreatment,themeanTMVdecreasedfrom9.47±1.98mm3to8.77±1.31mm3(P=0.01).InSTtherewassignificantdecreaseinTMV,P=0.01,Furtherwithinthesegroupsat6months,theyweresignificantlydifferent,P=0.01.·CONCLUSION:OCTshowedthedifferentmorphologicalvariantofCSMEwhiletheresponseoftreatmentisdifferent.TMVdecreasedthemostandhenceshowedtheimprovementinvisionafter6monthsoflasertreatment.IntheeraofAntivascularendothelialgrowthfactors(VEGFs),efficacyoflaserseemstobeinshadowbutitisstillfirstlineoftreatmentindevelopingnationlikeNepalwhereantiVEGFsmaynotbeeasilyavailableandaffordable.
简介:目的:观察玻璃体切除联合带蒂的非翻瓣内界膜(ILM)转位手术治疗大直径黄斑裂孔(macularhole,MH)的效果。方法:前瞻性研究。2016-12/2017-02于江苏省人民医院收治的9例10眼经频域光学相干断层扫描(SD-OCT)确诊为大直径MH患者(MH>400m),进行玻璃体切除联合ILM转位术。术前、术后1d,1wk,1、3、6mo随访SD-OCT、最佳矫正视力(bestcorrectedvisualacuity,BCVA)及微视野检查。结果:患者裂孔闭合率为100%;术前BCVA(LogMAR)1.19~0.54,术后视力提高显著,末次随访0.70~0.50(P=0.005);黄斑8°平均视网膜光敏感度(MS)值术前3.14~4.52dB、术后末次随访8.91~5.53dB(P=0.008);黄斑2°MS值术前1.46~2.94dB、术后末次随访6.33~4.90dB(P=0.008)。术前固视不稳定8眼,术后末次随访固视不稳定1眼。结论:玻璃体切除联合内界膜转位手术可以有效治疗大直径MH,具有较高的裂孔闭合率,术后视功能改善显著。
简介:<正>DirSir,IamdoctorGuo-YuanYang,fromtheDepartmentofOphthalmologyofWestChinaHospitalofSichuanUniversityinChengdu,SichuanProvince,China.Iwritetopresentacasereportofposteriorlentiglobuswithcataract.
简介:对有晶状体眼植入后房型人工晶状体是矫正屈光不正的有效方法,植入的后房型人工晶状体目前主要有可植入式接触镜(implantablecontactlens,ICL)和有晶状体眼屈光性晶状体(phakicrefractivelens,PRL)。对术后患者主观视觉质量(视力、对比敏感度)、客观视觉质量(波前像差、点扩散函数、斯特尔比率及光学传递函数)的研究显示,主观视力的提高也伴随着客观视觉质量的改善,但部分患者术后出现光晕及眩光症状。本文主要对ICL和PRL植入术后主观及客观视觉质量的临床研究做一综述,对可影响视觉质量的术后并发症如晶状体前囊膜下混浊、青光眼及角膜内皮功能异常等需进一步远期随访。
简介:AIM:Toinvestigatetheefficacyofnon-buckledvitrectomywithclassicalendotamponadeagentsinthetreatmentofprimaryretinaldetachment(RD)complicatedbyinferiorbreaksandproliferativevitreoretinophathy(PVR).METHODS:Aretrospective,consecutiveandcaseseriesstudyof40patientswithinferiorbreakRDandPVR≥C1wasconducted.Allpatientsunderwentastandard3-port20-gaugeparsplanavitrectomy(PPV)withgasorsiliconeoiltamponadewithoutsupplementaryscleralbuckling.Thevitreousandallproliferativemembranewerecompletelyremoved,andretinectomywasperformedwhennecessary.Themeanfollow-upwas12.5months.Theprimaryandfinalanatomicsuccessrate,visualacuityandcomplicationswererecordedandanalyzed.RESULTS:Primaryanatomicsuccessratewasachievedin35of40eyes(87.5%)andthefinalanatomicsuccessratewas100%.ThemostcommoncauseofredetachmentwasrecurrentPVR.Thebest-correctedvisualacuity(BCVA)atfinalfollow-upwasimprovedin34eyes(85%),remainedstablein1eye(2.5%),andworsenedin5eyes(12.5%).Themeanvisualacuityatfinalfollow-upwasimprovedsignificantly(P=0.000).CONCLUSION:ThisretrospectivestudyprovidesevidencethatvitrectomywithoutscleralbucklingseemedtobeaneffectivetreatmentforinferiorbreakRDwithPVR.Withcompleteremovalofvitreousandproliferativemembranesandtimingofretinectomy,theinferiorbreakswhichcomplicatedwithPVRcouldbeclosedsuccessfullywithoutadditionalscleralbuckling.
简介:AIM:ToinvestigatetheeffectofY-27632onthesurvivalandneuriteoutgrowthoftheculturedretinalneurocytes.METHODS:Afterthepostnatalday2-3,Sprague-Dawleyretinalneurocyteswereculturedfor48hours,theculturemediawasreplacedwithserum-freemedia(controlgroup)andserum-freemediacontained30μmol/LY-27632(Y-27632group),andthecellswerecontinuallyculturedanother48hours.Theculturedretinalneurocyteswereidentifiedwithanti-neuronspecificenolase(NSE)immunocytochemistry.ThesurvivalstateofthosecellswasestimatedbyMTTassay,andtheneuriteoutgrowthofthosecellswasevaluatedbythecomputerizedimage-analysissystem.RESULTS:Comparedwiththecontrolgroup,theabsorbancevaluesofcellssurvivalinY-27632groupincreased12.90%and33.33%respectivelyafter72and96hoursculture.Y-27632hadnosignificanteffectonthediameterofculturedretinalneurocytes.Comparedwiththecontrolgroup,Y-27632inducedastableimprovementofneuriteoutgrowthofretinalneurocytesafter72and96hoursculture(P=0.001).CONCLUSION:Y-27632couldpromotethesurvivalandneuriteoutgrowthoftheearlypostnatalculturedretinalneurocytes.
简介:AIM:ToevaluatetheefficacyofSeprafilmtransplantationfollowingadhesiolysisforpreventingpostoperativereadhesionandimprovingsurgicaloutcomes.METHODS:Primaryblepharoplastywascarriedoutonbotheyelidsof18albinorabbits.After2weeks,anewskinincisionwasmade,andadhesiolysiswasperformedonbotheyelids.Therabbitswerecategorizedintotwogroups,onewithadhesiolysisaloneinthelefteyelid(controlgroup),andtheotherwithadhesiolysiswithaSeprafilmgraftintherighteyelid(Seprafilmgroup).Thedegreesofinflammationandfibrosiswereexaminedwithhematoxylin-eosin(HE)andMasson’strichromestains.Expressionofα-smoothmuscleactin(α-SMA)wasalsoimmunohistochemicallyexamined.RESULTS:Eyelidexaminationimmediatelyaftertheoperationrevealedmildswellingandhemorrhageinbothgroups,butthesesymptomsresolvedafter1week-2weeks,andeyelidshapehadrecoveredcompletelyinbothgroups.MicroscopicassessmentsdemonstratedthattheSeprafilmgroupshowedlessinflammationandfibrosisthanthecontrolgroup.TheSeprafilmgroupalsoexhibitedfewerα-SMA-positivecellsthanthecontrolgroup.CONCLUSION:Basedonthesefindings,weconcludethatSeprafilmgraftwithadhesiolysisisaneffectivemethodforpreventingpostoperativereadhesionsaftereyelidsurgery.
简介:·AIM:Toinvestigatethetherapeuticeffectsofnanophtha-locyaninephotosensitizersonanexperimentalratchoroidalneovescularization(CNV)model,aswellastoevaluatethecytotoxicityofwhichonhumanretinalpigmentepithelia(HRPE)andhumanretinalendothelialcells(HRECs).·METHODS:Twotypesofphotosensitizers,G1-ZnPc(COOH)8andG1-ZnPc(COOH)8/mrespectively,wereadministratedforphotodynamictherapy(PDT)afterasuccessfulestablishmentofCNVmodelonBrown-Norway(BN)ratsviafundusphotocoagulation.Thetherapeuticeffectsofthetwodrugswereassessedthroughopticalcoherencetomography(OCT),fluoresceinfundusangiography(FFA)andtransmissionelectronmicroscopy(TEM).Forcytotoxicitytests,cellcountingkit-8(CCK-8)assaysandchangesofmitochondrialtransmembranepotential(△Ψm)wereconductedonHRPEandHRECsafterinitialuptakeofthetwodrugs.·RESULTS:Bothphotosensitizersdemonstratedanimprove-mentofvascularleakageandclosureofCNV1weekafterPDTasconfirmedbyfundusimage,OCT,FFAandTEM.TwoweeksafterPDT,G1-ZnPc(COOH)8/mshowedabetterCNVclosureeffectversusG1-ZnPc(COOH)8(P<0.05).Asignificantdifference(P<0.01)wasfoundinuptakeofthetwodrugsinHRPEandHRECs,withnodifferencebetweenthedrugs(P>0.05).BothphotosensitizersshowedcytotoxicityonHRPE,butG1-ZnPc(COOH)8/minducedalowercellviability.·CONCLUSION:G1-ZnPc(COOH)8/mmediatedPDTisbetterthanG1-ZnPc(COOH)8inCNVclosureandalsohavetheadvantageoffastmetabolismleadingtolesssideeffect.·
简介:AIM:Tocharacterizetemporalpatternofresolutionandrecurrenceofnaivechoroidalneovascularization(CNV)secondarytowetage-relatedmaculardegeneration(AMD)treatedwithintravitrealbevacizumabonasneededregimen,andtoanalyzebaselineriskfactorsforCNVresolutionorrecurrence.METHODS:Ninety-oneeyesof80patientswithnewlydiagnosedwetAMDwereretrospectivelystudied.Alleyesweretreatedwitharoundofthreemonthlyintravitrealbevacizumabinjections,followedbyoneadditional’bonus’injectionafterresolutionofCNVactivity.Duringfollow-up,eyesweremonitoredwithfluoresceinangiography,opticalcoherencetomography,andbest-correctedvisualacuity(BCVA).IncaseofrecurrencesofCNVactivity,eyeswereretreatedwithotherroundsofbevacizumabinjectionsfollowingthesametreatmentprotocol.RESULTS:Overamedianfollow-upof532d,themedianresolutiontimeofCNVactivityinthefirst,second,andthirdtreatmentroundwas98d,126d,and111d,respectively.Themedianrecurrencetimeforthethreeroundswas154d,126d,and151d,respectively.Nosignificantdifferenceinresolutiontime(P=0.09)orinrecurrencetime(P=0.11)wasdetectedamongtreatmentrounds.Age(P=0.0082)andlensstatus(P=0.035)werefoundtobeassociatedwithCNVresolution;forevery1-yearincreaseinagetherewas4%greaterchanceofCNVresolution;Phakiceyesdemonstrateda33%betterchancetoexperienceCNVresolutionthanpseudophakiceyes.ForCNVrecurrence,lensstatus(P=0.0009)andgender(P=0.0446)werefoundtobepredictive;pseudophakiceyeshada3.69-foldgreaterrisktoexperiencerecurrenceofCNVactivitycomparedtophakiceyes;maleshada2.19-foldgreaterrisktoexperiencerecurrenceofCNVactivitythanfemales.NosignificantBCVAchangesamongthreetreatmentroundswerenoted(P=0.56).CONCLUSION:ResolutiontimeandrecurrencetimeofCNVactivitywerenotsignificantlydifferentamongtreatmentrounds,suggestingabsenceoftachyphylaxistobevacizumab.Acautiousdecisionshouldbemadeupondisco
简介:AIM:Tocomparetheeffectoftopicallyadministeredandsubconjunctivallyinjectedbevacizumabonexperimentalcornealneovascularizationinratsfortwoweeksaftertreatment.METHODS:Twenty-eightSprague-Dawleyratsweredividedintofourgroupsof7animals.Eachcornealcenterofrighteyewascauterizedwithsilver/potassiumnitratefor8s.Aftercornealburning,bevacizumab(12.5mg/mL)wastopicallyadministeredthreetimesperday(TBgroup)fortwoweeksorsubconjunctivallyinjectedondays2and4aftercauterization(0.02mL;SBgroup).Asnegativecontrols,ratsreceived0.9%salinetopicallythreetimesperday(TSgroup)orsubconjunctivallyondays2and4(0.02mL;SSgroup).Digitalphotographsofthecorneaweretaken1and2weeksaftertreatmentandanalyzedtodeterminetheareaofcorneacoveredbyneovascularizationasthepercentageofcornealneovascularization.RESULTS:Oneweekaftertreatment,thepercentageofcornealneovascularizationwassignificantlylowerintheTBandSBgroupsthanintheTSandSSgroups(allP<0.05).Twoweeksaftertreatment,thepercentageofcornealneovascularizationwassignificantlylowerintheTBgroupthanintheTSgroup(P<0.05).Inallgroups,thepercentageofneovascularizationwasdecreasingastimepassed(allP<0.05)CONCLUSION:Topicallyadministeredbevacizumabhaslongerstandinganti-angiogeniceffectthansubconjunctivallyinjectedbevacizumabincornealneovascularizationfollowingchemicalinjuryinrats.
简介:Choroidalneovascularization(CNV)isanuncommoncomplicationassociatedwithamacularhole.Inthiscasereportofararecondition,wepresentapathologicmyopiapatientwithaco-existentmacularholeandchoroidalneovascularmembrane.ThepatientwastreatedwithphotodynamictherapyforCNV,andthenvitreoussurgeryfortheretinaldetachmentandmacularhole.Attheendof4yearsfollow-up,hervisualacuitywasimprovedto0.1whilethemacularholeremainedopen.OpticalcoherencetomographyisausefulinspectionmethodofthediagnosisofCNVandmacularhole.
简介:AIM:Tostudytheimpactofscleralflapposition,underwhichtheposteriorchamberintraocularlenses(PC-IOL)weresulcus-fixedbytrans-scleralsuture,oncorneaastigmatism.METHODS:Twenty-sixaphakicorcataracteyeswerecomprisedinthisprospectivenoncomparativecaseseriesstudy.Eleveneyeshadtraumaticcataractremovedwithoutsufficientcapsularsupport,3hadblunttraumawithsubluxatedtraumaticcataract,8hadundergonevitreoretinalsurgeryand4hadcongenitalcataractremoved.Theaverageagewas54years(range21-74years),with17menand7women.ThefoldablePC-IOLwasfixedinsulcusbytrans-scleralsuture.TheincisionforIOLimplantationwasmade1mmposteriortolimbusalongthesteepestmeridianofcornea,whilescleralflapstoburytheknotsoftrans-scleralsutureweremadealongtheflattestmeridian.Allthesurgerieswereperformedbyasingledoctor(MaL),andthefollowupwasatleast13months(range13-28months).Thepreoperative,3monthsand1yearpostoperativecornealcurvaturealongthesteepestandflattestcorneameridianandoverallcorneaastigmatismwerecompared.RESULTS:Thecurvaturealongthesteepestmeridianchangedfrom44.25±2.22Dpreoperativelyto44.08±2.16Dat3monthspostoperatively,and43.65±5.23Dat1yearpostoperatively(P>0.05);thecurvaturealongtheflattestmeridianchangedfrom41.24±2.21Dpreoperativelyto43.15±3.94Dat3monthspostoperatively,and42.85±5.17Dat1yearpostoperatively(P<0.05);andthesurgeryinducedastigmatism(SIA)oncorneawascalculatedbyvectoranalysis,whichwas2.42±2.13Dat3monthspostoperatively,and2.18±3.42Dat1yearpostoperatively,thedifferencewasstatisticallysignificant(P<0.05).CONCLUSION:Thescleralflapmadealongtheflattestmeridian,underwhichtheposteriorchamberintraocularlenses(PCIOL)weresulcus-fixedbytrans-scleralsuture,cansteepenthecorneainvaryingdegrees,thusreducingpreexistingcornealastigmatism.