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160 个结果
  • 简介:目的:检测DNA氧化损伤标志物8-羟基脱氧鸟苷(8-OHdG)翼状胬肉和正常结膜组织中的表达,探讨DNA氧化损伤在翼状胬肉发病机制中的作用。方法:收集我科行翼状胬肉切除手术的原发性翼状胬肉组织标本35例,并收集术眼颞上方正常球结膜标本5例作对照。采用免疫组织化学法检测翼状胬肉标本中8-OHdG的表达,并与正常球结膜组织的标本进行对照。结果:35例翼状胬肉组织中有24例呈阳性表达,阳性表达率为69%,而正常结膜组织中无8-OHdG的表达,其阳性表达率的差异具有显著统计学意义(P=0.007)。8-OHdG的阳性表达位于胬肉组织上皮细胞的细胞核,呈棕黄色着染,上皮下的纤维血管组织及正常结膜组织无表达。结论:翼状胬肉组织中8-OHdG呈阳性表达,而正常结膜组织中不表达,提示DNA氧化损伤在翼状胬肉的发病机制中发挥重要作用。

  • 标签: 翼状胬肉 8-羟基脱氧鸟苷 DNA氧化损伤
  • 简介:目的探讨白内障防盲手术中透明质酸酶和亚甲蓝染色对麻醉效果和连续环形撕囊成功率及对手术效果的影响。方法100例(100眼)白色白内障随机分为2组进行前瞻性研究。球周麻醉中加入透明质酸酶及改良亚甲蓝前囊膜染色组53例,对照组(球周麻醉中不加入透明质酸酶和前囊不染色)47例。球周麻醉后,行现代白内障囊外摘除及人晶状体植入术。比较环形撕囊成功率、术中并发症、术后反应情况、视力、眼压。结果2组术中撕囊成功率及人工晶状体体囊袋内植入率均有差别,与对照组相比差异有统计学意义;2组术后反应情况、视力、眼压无统计学意义。结论球周麻醉中加入透明质酸酶及改良亚甲监染色明显提高连续环形撕囊成功率。降低白内障手术并发症,无明显副作用,且廉价易得,适合在防盲白内障手术中推广。

  • 标签: 白内障 透明质酸酶 亚甲蓝 囊膜染色
  • 简介:糖尿病的发病率日益攀升,随之,严重影响患者视力的糖尿病性黄斑水肿(diabeticmacularedema,DME)的危害也日显严峻。如何治疗DME,提高患者生存质量成为医患共同关注的问题。1DME的基本机制糖尿病视网膜病变不管非增殖期还是增殖期,都可出现黄斑水肿,黄斑区局部的微血管瘤渗漏可引起局灶性水肿,而后极部毛细血管的广泛渗漏则引起弥漫性黄斑水肿。

  • 标签: MACULAR 微血管瘤 弥漫性黄斑水肿 眼内注射 毛细血管床 注射组
  • 简介:目的:通过多焦视网膜电图(multifocalelectroretinography,mf-ERG)中心性浆液性脉络膜视网膜病变(centralserouschorioretinopathy,CSC)治疗前后的观察,提高CSC诊断的准确性,并指导临床诊疗,评估预后。方法:设置有比较性的CSC观察组和双眼正常的对照组。观察组有31例CSC患者都是单眼发病,这些患者每只眼(包括患眼与对侧眼)发病期与恢复期都经过眼科的系统检查,包括最佳矫正视力、眼底荧光血管造影、OCT和mf-ERG,并记录这些检查的数据。对照组有30例,与观察组年龄范围相同,同样做上述检查并记录数据。对两组数据进行对比分析。结果:CSC发病期,mf-ERG显示患眼平均视网膜振幅密度1环为60.54±18.20nV/degree2,比对照组(110.94±31.20nV/degree2)低45.43%(P〈0.01),2环为38.12±10.81nV/degree2,比对照组(60.91±11.43nV/degree2)低37.42%(P〈0.05)。恢复期,mf-ERG显示患眼平均视网膜振幅密度1环为93.71±14.13nV/degree2,比对照组(110.94±31.20nV/degree2)低15.53%(P〈0.05);2环为51.16±10.34nV/degree2,比对照组(60.91±11.43nV/degree2)低16.01%(P〈0.05)。另外,我们还发现,观察组31例患者中有8例对侧眼也显示出异常,平均视网膜振幅密度1环为62.41nV/degree2,其余23例患者对侧眼未发现异常。结论:多焦视网膜电图有助于中心性浆液性脉络膜视网膜病变患者的临床治疗与随访观察,对中心性浆液性脉络膜视网膜病变患者的诊断、病情评估及预后都起着重要的作用。

  • 标签: 中心性浆液性脉络膜视网膜病变 多焦视网膜电图
  • 简介:目的探讨改良软壳技术玻璃体切割术后并发性白内障超声乳化手术中的应用效果。方法回顾性分析玻璃体切割术后并发性白内障超声乳化手术29例(29眼)患者的临床资料,术中应用改良软壳技术保护角膜内皮及晶状体后囊膜,观察术中并发症和术后视力改善情况、眼压及角膜情况。结果29眼白内障超声乳化联合人工晶状体植入手术进行顺利;无瞳孔缩小、巩膜塌陷、后囊膜破裂、晶状体坠入玻璃体腔及爆发性脉络膜出血发生;术后视力较术前改善22眼(78.9%),视力不变7眼(21.1%);术后1周内8眼(27.6%)出现一过性高眼压,5眼(17.3%)出现轻度角膜水肿;后囊膜混浊4眼(13.8%),行YAG激光治疗;术后角膜内皮细胞丢失率(9.81±3.07)%。结论玻璃体切除术后并发白内障超声乳化手术具有一定的挑战性,但改良的囊袋内软壳技术可有效保护角膜内皮及晶状体后囊膜,提高手术安全性,值得临床上推广应用。

  • 标签: 改良软壳技术 玻璃体切割术 并发性白内障 超声乳化术
  • 简介:目的:观察MoriaM2型90与110μm角膜刀制作角膜瓣准分子激光角膜原位磨镶术(laserinsitukeratomileusis,LASIK)的疗效和并发症,探讨MoriaM2型90刀头LASIK中应用的有效性、安全性和优点。方法:选取通过术前检查并自愿行LASIK手术的患者105例202眼,按随机数字表分成两组,使用MoriaM2型90刀头LASIK患者51例98眼,110刀头LASIK患者54例104眼做对照,术后即使用光学相干断层扫描仪(OCT)检测两组角膜瓣厚度,观察两组术后1d;1wk;1,3mo裸眼视力、矫正视力和角膜瓣形态、对合情况、并发症。结果:90刀头组术后角膜瓣厚度为118.3±15.2μm,110刀头组术后角膜瓣厚度为130.5±17.1μm,有显著性差异。90刀头组均未发现层间点状金属碎屑,110刀头组有层间点状金属碎屑个例(12例),有显著性差异。两组角膜瓣形态、对合情况、术后反应、术后裸眼视力相当。结论:应用90刀头LASIK的疗效及并发症和110刀头LASIK相当,但90刀头保留角膜基质床相对较厚,可矫治的屈光度更大,术后层间点状金属碎屑并发症更少,具有更好的安全性和更宽的适应范围。

  • 标签: MORIA M2型90刀头 MORIA M2型110刀头 准分子激光角膜原位磨镶术 随机对照
  • 简介:目的分析前房穿刺术急性闭角型青光眼急性发作期药物不能控制眼压中的疗效及其并发症情况.方法对21例22眼急性闭角型青光眼急性发作患者应用常规降眼压药物治疗未能有效降压后,采取表麻下手术,显微镜下进行前房穿刺术放液,观察眼压控制以及并发症情况.结果术前眼压均≥50mmHg,所有患者经穿刺放液后,症状缓解,眼压下降,平均为21.5mmHg,视力提高,角膜水肿及睫状充血明显好转,8例患眼术后次日复查眼压复上升,于原穿刺切口再放液,眼压控制后予以相应手术,术后恢复良好.结论前房穿刺术是治疗急性闭角型青光眼急性发作期高眼压持续状态的有效方法,损伤小,反应轻,并发症少,为急性闭角型青光眼进一步治疗创造了条件,并且能够改善其预后.

  • 标签: 前房穿刺术 急性闭角型青光眼 高眼压
  • 简介:AIM:Toexploretheeffectofsaturatedhydrogensalineonbluelight-inducedretinaldamageinrats.·METHODS:Theretinaldamageofratswasinducedbybluelightexposurefor6hoursandexamined8hours,16hoursand24hoursaftertheexposure.OnehundredfemaleSprague-Dawleyratswererandomlydividedintofourgroups.Group1included30ratsreceivedlightexposurewithoutanyothertreatment.Group2included30ratsreceivedlightexposurewithintraperitonealinjectionofnormalsaline.Group3included30ratsreceivedlightexposurewithintraperitonealinjectionofsaturatedhydrogensaline.AndGroup4includedtheother10ratswhichdidnotreceiveanytreatment.Theamountofintraperitonealinjectionofsaturatedhydrogensalineandnormalsalinewascalculatedintheratioof1ml/100gofratweight.SpecimenswerecollectedandprocessedbyH-Estaining,ultrastructureobservation,biochemicalmeasurement.Morphologicalchangeswereobservedbylightmicroscopeandtransmissionelectronmicroscope(TEM)andtheretinalouternuclearlayer(ONL)thicknesswasmeasuredbyIPP6.0,whilethemalondialdehyde(MDA)wasmeasuredbycolorimetricdeterminationat532nm.·RESULTS:AlthoughthestructureofretinainGroup1andGroup2wasinjuredheavily,theinjuryinGroup3wasmild.ThedifferencesbetweenGroup1andGroup2werenotsignificant.ComparedwiththeratsinGroup1andGroup2,theonesinGroup3hadmoreclearlydemarcatedretinastructureandmoreorderedcellsbylightmicroscopeandTEMobservation.TheONLthicknesses(400times)offourgroupsateachtimepointexceptbetweenGroup1andGroup2weresignificantlydifferent(P<0.05).ThethicknessesoftheONLinGroup1atthreetimepointswere30.41±4.04μm,26.11±2.82μmand20.63±1.06μm,inGroup2were31.62±4.54μm,25.08±3.63μmand19.07±3.86μm,inGroup3were29.75±3.62μm,28.83±1.97μmand27.61±1.83μm.InGroup4themeanofthethicknesswas37.35±1.37μm.Astimewentby,thedamageg

  • 标签: RETINA hydrogen ANTIOXIDANTS PHOTOTOXICITY DOI.3980/j.issn.2222-3959.2012.02.07
  • 简介:糖尿病视网膜病变(diabeticretinopathy,DR)进入增殖期,出现玻璃体积血(vitreoushemorrhage,VH)、牵引性视网膜脱离(tractionalretinaldetachment,TRD),玻璃体切除术是临床干预的有效手段之一。但由于视网膜新生血管的存在,术中复杂且难以预估的出血,不仅干扰术者的手术视野,增加各种手术器械的更换频度,提高手术难度,延长手术时间,同时也对治疗的预后有着不可忽视的不良影响。

  • 标签: 玻璃体切除术 视网膜新生血管 DETACHMENT 围手术期 手术视野 玻璃体积血
  • 简介:AIM:Toinvestigatewhether15-Lipoxygenase-1(15-LOX-1)playsanimportantroleintheregulationofangiogenesis,inhibitinghypoxia-inducedproliferationofretinalmicrovascularendothelialcells(RMVECs)andtheunderlyingmechanism.METHODS:PrimaryRMVECswereisolatedfromtheretinasofC57/BL6JmiceandidentifiedbyanevaluationforFITC-markedCD31.ThehypoxiamodelswereestablishedwiththeBio-bagandevaluatedwithablood-gasanalyzer.ExperimentswereperformedusingRMVECstreatedwithandwithouttransferAd-15-LOX-1orAd-vectorbothunderhypoxiaandnormoxiaconditionat12,24,48,72hours.Theefficacyofthegenetransferwasassessedbyimmunofluorescencestaining.CellsproliferationwasevaluatedbytheCCK-8method.RNAandproteinexpressionsof15-LOX-1,VEGF-A,VEGFR-2,eNOsandPPAR-rwereanalyzedbyreal-timereversetranscriptionpolymerasechainreaction(RT-PCR)andWesternblot.RESULTS:RoutineevaluationforFITC-markedCD31showedthatcellswerepure.Theresultsofblood-gasanalysisshowedthatwhenthecultureswereexposedtohypoxiaformorethan2hours,thePo2was4.5to5.4Kpa.WeverifiedRMVECscouldbeinfectedwithAd-15-LOX-1orAd-vectorviaFluorescencemicroscopy.CCK-8analysisrevealedthattheproliferativecapacitiesofRMVECsinhypoxicgroupweresignificantlyhigherateachtimepointthantheywereinnormoxicgroup(P<0.05).Inahypoxiccondition,theproliferativecapacitiesofRMVECsin15-LOX-1groupweresignificantlyinhibited(P<0.05).Real-timeRT-PCRanalysisrevealedthattheexpressionsofVEGF-A,VEGF-R2andeNOsmRNAincreasedinhypoxiagroupcomparedwithnormoxiagroup(P<0.01).However,theexpressionsof15-LOX-1,PPAR-rmRNAdecreasedinhypoxiagroupcomparedwithnormoxiagroup(P<0.01).Italsoshowedthatinahypoxiccondition,theexpressionsofVEGF-A,VEGF-R2andeNOsmRNAdecreasedsignificantlyin15-LOX-1groupcomparedwithhypoxiagroup(P<0.01).However,15-LOX-1andPPAR-rmRNAincreasedsigni

  • 标签: 15-Lipoxygenase-1 hypoxia RETINAL MICROVASCULAR endothelial cells
  • 简介:<正>DearSir,IamDr.Sheng-LiMi,fromtheBiomanufacturingengineeringlaboratory,GraduateSchoolatShenzhen,TsinghuaUniversity,Shenzhen,China.Iwritetopresentacasereportofnocardiabrasiliensisinapatientwithdiabetes.Nocardiaispartofagroupofaerobicactinomycetes,widelydistributedinsoil.Nocardiaasteroidsandnocardiabrasiliensisarethemostcommonhumanpathogens.Humansinfectedbynocardiaasteroidsthroughtherespiratorytractmainlysufferfromprimarysuppurativepulmonaryconditions.Infectionofnocardiabrasiliensisoftenoccursintheadvancedstagesofaprogressivediseaseorimmunedisorder,especiallyCushingsyndrome,diabetes,orinpatientsusingcorticosteroids,immunosuppressiveagentsandbroad-spectrumantibioticsforlongtime[1].Toourknowledge,thereportsofnocardiakeratitiswasveryrare

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  • 简介:AIM:Todeterminethenormativevaluesofwhite-towhitecornealdiameterwithOrbscanIITopographySystemandtocomparerightandlefteyesdatainthenormalyoungpopulation.METHODS:Atotalof1001healthyparticipantsaged18-45yparticipatedinthisobservationalcross-sectionalstudy.Thestudypopulationconsistedof616femaleand385malesubjects.ThecornealdiameterwasmeasuredwiththeOrbscanII.Thedifferencesbetweengenders,betweenrightandlefteyesandage-relatedchangeswereevaluated.StatisticalanalyseswereperformedusingStudent’st-test.RESULTS:Theaveragewhite-to-whitedistanceinourstudypopulationwasrecordedas11.65±0.36mm(median:11.60mm,mode:11.70mm,minimum:10.50mmandmaximum:13.60mm).Thewhite-to-whitedistancewas11.60±0.35mminmalesand11.71±0.36mminfemaleswhichwasstatisticallydifferentbetweengenders(P<0.01).However,white-to-whitedistancewasnotstatisticallydifferentbetweenrightandlefteyes.Inaddition,thisparameterdecreasedwithincreasingage.Considering95%confidenceinterval,cornealdiameterlessthan10.93mmandgreaterthan12.34mmwouldbeconsideredasmicrocorneaandmegalocornea,respectivelybasedonthisstudypopulation,usingtheOrbscanIItopography.CONCLUSION:DetaileddescriptionandanalysisofcornealdiameterwithOrbscandemonstratethattheobtainedaveragevalueofhorizontalwhite-to-whiteishigherinmalethanfemaleanddecreasesslightlywithincreasingage.Ourdataalsosuggeststhecutoffvaluesfordefinitionofmicrocorneaandmegalocornea,whichcanbeemployedwiththispopulation.

  • 标签: white-to-white CORNEAL DIAMETER ORBSCAN II NORMAL
  • 简介:AIM:Toexaminetheexpressionofsurvivinandvascularendothelialgrowthfactor(VEGF)duringthedevelopmentofretinalneovascularization(NV)inamousemodel.·METHODS:Awell-characterizedmurinemodelofretinalNVwasusedtostudytheexpressionofsurvivinandVEGF.NVoftheretinawasinducedinmicebyexposureto75%O2frompostnataldayP7toP12,followedbyreturntoroomairfromP12toP17.ExpressionofsurvivinandVEGFproteinwasanalyzedbyImmunohistochemistry.Inaddition,mousemodelofproliferativeretinopathywasanalyzedbyretinalfluoresceinangiographyandquantificationanalysis.·RESULTS:Thenormalmicehadbothsuperfiekalanddeepvascularlayersthatextendedfromtheopticnervetotheperiphery.Inintraocularpressure(IOP)micewerecharacterizedbyrepresentatypicalpatternofpathologicalretinalNV.Therearelessorlittlenucleiofnewvesselsvascularendothelialcellbreakingthroughtheinnerretinalthaninretinopathyofprematurity(ROP)mice,largeclustersofbloodvesselswereadherenttotheinternallimitingmembrane(ILM)(0.27±0.20vs23.38±1.027,t=9.454,P<0.001).DuringtheangiogenicperiodfromP13toP17,survivinandVEGFproteinexpressionincreasedinexperimentalretinascomparedwithcontrolsamples(2.56±0.46vs3.34±0.40,t=17.43,P<0.01:2.18±0.75vs4.34±0.25,t=19.61,P<0.01).ProteinlevelsofVEGFandsurvivnhassignificantlypositivecorrelation(P<0.05,r=0.411).·CONCLUSION:CorrelationwasmadeattheproteinlevelsofsurvivinexpressioncomparedwiththatofVEGFinamurinemodelofretinalNV,whichsuggestsatemporalroleforsurvivinandVEGFinnewvesselformationinresponsetohypoxicstimulation.

  • 标签: RETINAL NEOVASCULARIZATION SURVIVIN VASCULAR ENDOTHELIAL growth
  • 简介:AIM:ToinvestigatetheeffectofintravitrealinjectionofDL-alpha-aminoadipicacid(DL-α-AAA)onocularrefractivestateandretinaldopamine,transforminggrowthfactor-β2(TGFβ2),vasoactiveintestinalpolypeptide(VIP)inguineapigform-deprivedmyopia.METHODS:Four-week-oldpigmentedguineapigswererandomlyassignedto4groups:normalcontrol,deprivation,deprivationplusDL-α-AAA,deprivationplussaline.Formdeprivationwasinducedwiththeself-madetranslucenteyeshields,andlastedfor14days.8μgDL-α-AAAwasinjectedintothevitreouschamberofdeprivedeyes.Thecornealradiusofcurvature,refractionandaxiallengthweremeasured.Retinaldopaminecontentwasevaluatedbythehigh-performanceliquidchromatographywithelectrochemicaldetection,andTGFβ2andVIPproteinweredetectedbyWesternblotting.RESULTS:Fourteendaysofeyeocclusioncausedtheaxiallengthtoelongateandbecomemyopicintheform-deprivedeyes,withthedecreaseofretinaldopamineandtheincreaseofTGFβ2andvasoactiveintestinalpolypeptide(VIP)protein.IntravitrealinjectionofDL-α-AAAcouldinhibitthemyopicshiftfrom(-3.65±1.06)Dto(-1.48±0.63)D,P<0.01duetogogglesoccludingandcausethedecreaseofretinalTGFβ2proteininthedeprivedeyes.However,intravitrealinjectionofDL-α-AAAhadnosignificanteffectonretinaldopamineandVIPproteinindeprivedeyes.RetinalTGFβ2proteincorrelatedhighlywiththeocularrefraction(y=-3.34+0.31/x,F=74.75,P<0.001)andaxiallength(y=8.39-0.02/x,F=48.32,P<0.001)indifferenttreatmentgroups.·CONCLUSION:IntravitrealinjectionofDL-α-AAAiseffectivelyabletosuppressthedevelopmentofformdeprivationmyopia,whichmaybeassociatedwithretinalTGFβ2proteininguineapigs.

  • 标签: DL-alpha-aminoadipicacid form-deprivation MYOPIA TGFΒ2 Müller cell
  • 简介:AIM:Todescribethecharacteristicsofmodulationtransferfunction(MTF)ofanteriorcornealsurface,andobtainthethenormalreferencerangeofMTFatdifferentspatialfrequenciesandopticalzonesoftheanteriorcornealsurfaceinmyopes.·METHODS:Fourhundredeyesfrom200patientswereexaminedunderSIRIUScornealtopographysystem.PhoenisanalysissoftwarewasappliedtosimulatetheMTFcurvesofanteriorcornealsurfaceatverticalandhorizontalmeridiansatthe3,4,5,6,7mmopticalzonesofcornea.TheMTFvaluesatspatialfrequenciesof5,10,15,20,25,30,35,40,45,50,55and60cycles/degree(c/d)wereselected.·RESULTS:TheMTFcurveofanteriorcornealsurfacedecreasedrapidlyfromlowtointermediatefrequency(0-15cpd)atvariousopticalzonesofcornea,thevaluedecreasedto0slowlyathigherfrequency(>15cpd).Withtheincreaseoftheopticalzonesofcornea,MTFcurvedecreasedgradually.3)Intherangeof3mm-6mmopticalzonesofthecornea,theMTFvaluesmeasuredathorizontalmeridianweregreaterthanthecorrespondingvaluesathorizontalmeridianofeachspatialfrequency,thedifferencewasstatisticallysignificant(P<0.05).At7mmopticalzonesofcornea,theMTFvaluesmeasuredathorizontalmeridianwerelessthanthecorrespondingvaluesatverticalmeridianat10-60spatialfrequencies(cpd),andthedifferencewasstatisticallysignificantin25,30,35,40,45,50cpd(P<0.05).·CONCLUSION:MTFcanbeusedtodescribetheimagingqualityofopticalsystemsatanteriorcornealsurfaceobjectivelyindetail.

  • 标签: MODULATION TRANSFER FUNCTION OPTICAL quality CORNEA
  • 简介:AIM:Toevaluatetheepidemiologic,anatomic,andclinicalfeaturesofopenglobeinjuriesinchildren.METHODS:Themedicalfilesofpatientsundertheageof16whohadbeenoperatedforanopenglobeinjuryatAkdenizUniversityHospital’sDepartmentofOphthalmologywereretrospectivelyevaluated.RESULTS:Atotalof90patientswereevaluatedinthisstudy.Amongthesepatients,26(28.9%)werefemaleand64(71.1%)weremale.Themeanageofthepatientswas7.7±4.2years.Themale/femaleratiowasobservedtoincreasewithincreasingage(P=0.006,P=7.48).Injuriesweremostlikelytooccurinspringandautumn(P=0.028).Thetimeintervalbetweentheinjuryandthesurgicalrepairwas9.36±27.4h.Forty(44.4%)oftheinjuriesoccurredinthehome,27(30%)occurredintheyard,and21(23.3%)happenedwhileplayinginthestreet.Themostcommoncausesofinjuryweresharpmetalobjects(P<0.001).Injurytothecorneaoccurredin47(52.2%)ofthepatients(P<0.001).Themostcommoncomplicationtooccurwascataractformation.Additionaloperationswerenecessaryfor37(41.1%)ofthepatients.Thefinalvisualacuitywascorrelatedwithboththeinitialvisualacuityofthewoundedeyepriortosurgeryandthelengthofthewound(P<0.001,r=0.502andP<0.001,r=-0.442,respectively).CONCLUSION:Openglobeinjuriesthataresufferedinchildhoodgenerallyoccureitherathome,intheyard,oronthestreet,withsharpmetalobjectsbeingthemostcommoncauseofinjury.Theinitialvisualacuityandthelengthofthewoundarethemostimportantdeterminantsofthefinalvisualacuity.

  • 标签: CHILDHOOD EPIDEMIOLOGY open globe INJURY PREVENTION
  • 简介:目的:探讨线粒体膜电位(△ψm)、Caspase3As2O3诱导ACC-2细胞凋亡中的作用。方法:进行ACC-2细胞培养,将As2O3建立不同药物浓度梯度(0,1.0,2.0,4.0,8.0μmol/L)分别作用于ACC-2细胞,用Rh123染色,流式细胞仪检测8.0μmol/LAs2O3作用前、后(24h),ACC-2细胞的线粒体膜电位(△ψm)变化;用多功能酶标仪进行Caspase3活性检测。结果:空白对照组ACC-2细胞内Rh123荧光强度最强,8.0μmol/LAs2O3处理组ACC-2细胞内Rh123荧光强度减弱,其差异有显著性(P〈0.05);随着As2O3药物浓度的增高(0,1,2,4,8μmol/L),ACC-2细胞的Caspase3酶活力单位逐渐增加。结论:As2O3作用于ACC-2细胞,可通过降低线粒体膜电位从而引起细胞凋亡。随着As2O3药物浓度的增高,ACC-2细胞的Caspase3酶活力单位逐渐增加,Caspase3被激活,细胞可发生不可逆转的凋亡过程。

  • 标签: 三氧化二砷 腺样囊性癌ACC-2细胞 凋亡 线粒体膜电位 半胱氨酸蛋白酶3
  • 简介:目的:研究增殖细胞核抗原(proliferatingcellnuclearanti-gen,PCNA)和胰岛素样生长因子Ⅱ(insulin-likegrowthfactor-Ⅱ,IGF-Ⅱ)翼状胬肉中表达的关系。方法:应用免疫组织化学SABC法检测40例原发性翼状胬肉组织标本,10例正常结膜组织标本中PCNA和IGF-Ⅱ蛋白的表达情况。结果:翼状胬肉组中PCNA,IGF-Ⅱ表达均高于正常结膜组(P〈0.01),IGF-Ⅱ与PCNA蛋白表达之间的相关系数为0.731(P〈0.01)。结论:翼状胬肉为一种具有肿瘤潜能的增生性眼表疾病。IGF-Ⅱ通过促进细胞增殖参与了翼状胬肉的发生、发展。

  • 标签: 翼状胬肉 胰岛素样生长因子Ⅱ 增殖细胞核抗 原免疫组织化学
  • 简介:目的探讨生物羊膜60岁以上老人原发性闭角型青光眼滤过手术中应用效果.方法对临床收治的60岁以上原发性闭角型青光眼58例(70只眼)行小梁切除联合羊膜移植术观察其临床疗效,包括眼压,滤过泡,视力及并发症等方面的评估.结果术后第1天,第1周,第1、3、6月眼压均控制良手术成功率高,副反应小.讨论60岁以上老人眼球尤其是角膜缘处发生特殊的组织学改变,使其青光眼滤过手术中丝裂霉素C的使用更加受限,而生物羊膜副反应较小,且可以长期有效的降低眼压,提高手术成功率.

  • 标签: 60岁以上老人 原发性闭角型青光眼 生物羊膜 小梁切除术
  • 简介:AIM:Tocharacterizetheclinicalfeatures,diagnosis,treatmentandprognosisofuveitisassociatedwithankylosingspondylitis(AS)inChinesepatients.·METHODS:TwohundredandthreepatientswithuveitisassociatedwithASfollowed-upintheThirdMilitaryMedicalUniversityDapingHospitalbetween2005and2010wereretrospectivelyevaluatedinthisstudy.Completeophthalmologicalexaminationswereevaluatedatbaselineandduringthefollow-upperiod.Thegender,age,follow-uptime,meanfrequencyofuveitisonset,andaccompanyingeyeexaminationfindings,history,demographicalparameterswerereviewed.Allthepatientspresentedcompleteclinicalandradiologic(sacroiliac,lumbar,dorsalandcervicalspine,knee,ankle,shoulder,hip,elbow)evaluation.HLA-B27typingwasalsosearched.·RESULTS:Therewere203patientsdiagnosedwithASassociateduveitis.AllshowedsacroiliacX-raychangesindicativeofAS.Therewere184maleand19femalepatients.Theaverageageofpatientswas35±12(range18-50).Meanfollow-upperiodwas2.4years(1-5years).Acuteanterioruveitiswasthemostcommontypeofuveitisinbothgenders.121eyespresentedunilateralinvolvement(55.2%),and92eyespresentedbilateralinvolvement(45.3%)withonsetalternately.22eyesoccurredhypopyon,16eyeswerefoundanteriorvitreouscells,7eyeswerenotedreactivemacularedemaorexudation,29eyespresentedposteriorsynechiaeofiris,and14eyespresentedcataract,9eyespresentedsecondaryglaucoma,2eyespresentedbendcornealdegenerationand1eyespresentedatrophyofeyeball.Atthefinalvisit,uveitiswaswellcontrolledinmostpatients.·CONCLUSION:ASassociatedwithuveitisinChinesepatientsmainlymanifestsasacuteanterioruveitis.AcombinationofcorticosteroidswithothermydriasisagentsiseffectiveformostASassociatedwithuveitispatients.Ingeneral,theprognosisisgoodinthesecases.

  • 标签: HLA-B27 ANTERIOR UVEITIS acute ANTERIOR UVEITIS