简介:目的:探讨分析超声乳化手术前作视觉电生理检查对白内障预后的临床价值。方法:选取2009-01/2010-10在我院行白内障超声乳化手术治疗的白内障患者,针对直接和间接眼底镜下眼底窥不清253例,术前作视觉电生理检查了解视网膜和视神经情况以判断预后。结果:该253例患者中有47例经视觉电生理检查提示预后较差,其中接受白内障手术37例,有35例术后视功能恢复也相应较差(术后视力提高≤2行),2例术后视功能恢复情况相对较好(术后视力提高〉2行),另10例放弃手术;206例经视觉电生理检查提示预后较好,其中201例接受白内障手术,有199例术后视功能恢复也相应较好(术后视力提高〉2行),2例术后视功能恢复情况相对较差(术后视力提高≤2行),5例因有全身其他疾病不能手术。结论:白内障术前作视觉电生理检查了解视网膜及视神经情况,对于判断手术预后有良好的可预测性。
简介:目的:探讨硅油和重硅油两种眼内填充物对兔眼视网膜电生理的中长期影响。方法:选用标准家兔28只,右眼为术眼,随机分成3组,A组12只,B组12只,C组4只。A组:玻璃体切割联合玻璃体腔填充硅油组;B组:玻璃体切割联合玻璃体腔填充重硅油组;C组:玻璃体切割联合玻璃体腔填充平衡盐溶液组。对实验动物术眼术前与术后不同时间段测得的视网膜后极部厚度、眼压及视网膜电图b波振幅值进行统计分析。结果:实验A、B组及对照C组术前及术后不同时间点测得的术眼眼压经过两两比较,无统计学差异(P〉0.05);A、B、C组经两两比较,在术后第24wk时经OCT测得的术眼视网膜后极部厚度值均有统计学差异(P〈0.05);在术后第24wk时术眼ERG的b波振幅均值有显著统计学差异(P〈0.01)。结论:硅油或者重硅油在作为玻璃体腔内填充物后,对兔眼术后眼压中长期内的影响无明显差别;重硅油在填充后对兔眼视网膜视觉信息传导功能的负面影响,导致视网膜变薄的程度要明显大于普通硅油。
简介:AIM:Toassesstheeffectivenessofimmunosuppressantsintheprophylaxisofcornealallograftrejectionafterhigh-riskkeratoplastyandnormal-riskkeratoplasty.METHODS:WesearchedtheCochraneCentralRegisterofControlledTrials(CENTRAL),MEDLINE,EMBASE,CNKI,VIPandreferencelistsofarticles.Dateofmostrecentsearch:18June,2011.Allrandomisedcontrolledtrials(RCTs)assessingtheuseofimmunosupressantsinthepreventionofgraftrejection,irrespectiveofpublicationlanguage.Twoauthorsassessedtrialqualityandextracteddataindependently.Onlydichotomousoutcomes(cleargraftsurvival,ratioofimmunereactionsandsideeffects)wereavailableandwereexpressedasrelativerisk(RR)and95%confidenceintervals(CI).RESULTS:Sevenstudieswereincludedinthisreview.Inthecomparingofmycophenolatemofetil(MMF)withplacebo,theresultsshowedMMFcouldsignificantlyreduceimmunereactionscomparedwithplacebo(RR1.0895%Cl0.95to1.21),butnoeffectoncleargraftsurvival(RR1.1195%Cl0.90to1.35).Incleargraftsurvivalandimmunereactions,MMFandcyclosporineA(CsA)showedsimilareffect(RR1.1195%Cl0.90to1.35,andRR1.48,95%Cl0.56to3.93,respectively).Tacrolimus(FK506)andsteroidshowedsimilareffectsoncleargraftsurvivalandimmunereactions(RR0.32,95%CI0.02to6.21,andRR1.00,95%CI0.88to1.14,respectively).Nodrugrelativesideeffecthasbeenfound.CONCLUSION:MMFmayreduceimmunereactionsinbothnormal-riskandhigh-riskrejectionofpenetratingkeratoplasty.CsAandFK506showedsimilareffectsasMMF.However,duetothelackoflargeclinicaltrials,theevidenceremainweak,thequalityofevidenceswereratedasverylowtomoderate.Large,properlyrandomised,placebo-controlled,doublemaskedtrialsareneededtoevaluatetheeffectofimmunosuppressants.
简介:AIM:Todeterminetheproliferativepotentialandthemaintenanceofstemcellactivityinstoredhumanlimbaltissues,andcorrelatethiswiththepreservationtime,cellviabilityandtheexpressionofstemcellmarkers.METHODS:Thirtylimbalrimsweresplitinto4partsandstoredincornealpreservationmediumat4℃for0,1,4,or7days.ThelimbalstemcellandmitoticmarkersP63,CK19,proliferatingcellnuclearantigen(PCNA),andKi67weredeterminedbyimmunohistochemicalstaining.Theproliferativepotentialoflimbalepithelialcellswasassessedbycellviability,theabilityofgeneratingstratifiedepithelium,andcolonyformingassay.RESULTS:Thestoredtissuesmaintainedlimbalstratifiedstructureto7daysandexhibitedcomparableexpressionlevelofstemcellandmitoticmarkers.Theproportionofviablecellsdecreasedwiththeprolongedpreservationtime,whilecolonyformingefficiencydecreasedfromthe1stdayanddisappearedatthe4thday.Wheninoculatedonamnioticmembrane,thecellspreservedfor1dayformedastratifiedepithelium,whilethecellsfrom4days’preservationformedadiscontinuouslayer.CONCLUSION:Thecolonyformingefficiencyoflimbalepithelialstem/progenitorcellsdecreasedrapidlywiththeincreasingpreservationtime,whiletheexpressionlevelofmarkersandcapacityofformingepithelialmonolayeronamnioticmembranedecreasedgradually.Thelimbalepithelialstemcellslosttheirfunctionearlierthanthelostexpressionlevelofstemcellmarkers.Thismayhelpustobetterchoosetheappropriatepreservationgraftsforfuturelimbalstemcelltransplantation.
简介:目的探讨榄香烯对人喉癌Hep-2细胞生长的影响和作用机制.方法用四甲基偶氮唑盐法(methylthiazolyltetrazoliumassay,MTT)测定榄香烯对喉癌细胞的抑制作用;以透射电镜来观察其形态学变化;采用DNA末端标记法(terminaldeoxynucleotidy1transferasemediateddeoxyuridinetriphosphatenickendlabelingmethod,TUNEL)研究细胞凋亡数;用免疫组化分析bcl-2蛋白在Hep-2细胞中的表达.结果榄香烯明显抑制Hep-2细胞的生长;透射电镜观察到染色质浓缩,沿着核膜排列,形成不同形状和大小的块状;DNA末端标记法说明,凋亡细胞数随药物浓度的提高逐渐增高;免疫组化结果提示榄香烯能使Hep-2细胞bcl-2蛋白表达降低.结论榄香烯能够抑制喉癌细胞的生长,其抑制作用与细胞凋亡有关,作用机制可能与bcl-2表达降低有关.
简介:目的:用Tono-Pen眼压计测量人眼角膜中央、旁中央、角巩缘部位眼压值,比较不同部位值的差异及相关性。方法:正常角膜用Tono-Pen眼压计依次测量角膜中心、旁中心、角膜缘眼压值,方差分析不同部位眼压的差异,分析结果的相关性。结果:Tono-Pen眼压计检测得出的眼压平均值角膜中央为16.28±2.73mmHg,旁中央为16.33±2.69mmHg,角巩缘为16.58±2.58mmHg.角膜中心与旁中心的相关系数r=0.966,P=0.000,角膜中心与角膜缘的相关系数为r=0.897.P=0.000,角膜旁中心与角膜缘的相关系数为r=0.910,P=0.000。不同部位眼压值差异没有显著性(F=0.093,P=0.913〉0.05)。结论:不同部位眼压值密切相关,差异没有统计学意义。Tono-Pen眼压计测量不同部位眼压均可取得较为一致的结果。
简介:目的探讨健康体检中青光眼筛查方法及结果分析。方法采用同顾分析方法对我院健康体检数据库资料进行分析。结果在121697人健康体检中,发现青光眼1381例,患病率为1.14%,原发性闭角型青光眼(PACG)810例,患病率为0.67%,原发性开角型青光眼(POAG)476例,患病率为0.39%,正常眼压性青光眼(NTG)44例,患病率为0.04%,继发性青光眼(SG)51例、患病率为0。04%。正常大陷门者112例,术发现先天性青光眼。结论青光眼筛查方法应简易、快捷、价廉及有效的。对健康体检作青光眼筛查足必要的并且足可行的,而且在健康体检数据中为所有受检建立健康档案,这对青光眼患者诊断、治疗及评估有十分重要意义,特别对可疑青光眼受检者有一个长期跟踪观察及对比机会。
简介:目的:探讨miR-181在白内障晶状体组织中的表达情况,及其对人晶状体上皮细胞凋亡的调控机制。方法:利用Realtimeq-PCR方法,检测年龄相关性白内障患者晶状体前囊膜和人晶状体上皮细胞凋亡模型中miR-181的表达情况;利用Lipofectamine2000瞬时转染miR-181mimic和inhibitor调节人晶状体上皮细胞中miR-181的表达,利用Realtimeq-PCR方法验证转染效率,利用流式细胞仪检测细胞凋亡率的变化。结果:与对照组相比,年龄相关性白内障患者晶状体前囊膜组和人晶状体上皮细胞凋亡模型组,miR-181的表达显著升高;miR-181mimic转染组,miR-181的表达显著升高,细胞凋亡率显著升高;miR-181inhibitor转染组,miR-181的表达显著降低,细胞凋亡率显著降低,差异均有统计学意义(P〈0.01)。结论:miR-181在年龄相关性白内障晶状体组织中呈高表达,miR-181能够促进人晶状体上皮细胞凋亡,从而可能在年龄相关性白内障的发病过程中发挥一定作用,miR-181可能成为白内障非手术治疗的一种新途径,但具体机制有待进一步研究。
简介:Thedamageofhumancornealcellsencounterwiththeproblemofavailabilityofcornealcellsforreplacement.Limitationofthesourceofcornealcellshasbeenrealized.Anattemptofdevelopmentofcornealepithelial-likecellsfromthehumanskin-derivedprecursor(hSKPs)hasbeenmadeinthisstudy.Combinationofthreeessentialgrowthfactors:epidermalgrowthfactor(EGF),keratinocytegrowthfactor(KGF)andhepatocytegrowthfactor(HGF)coulddemonstratesuccessfullyinductionofhSKPstodifferentiationintocornealcells.Theinducedcellsexpressedtheappearanceofmarkersofcornealepithelialcellsasshownbythepresenceofkeratin3(K3)byantibodylabelandWesternblotassay.TheK3geneexpressionofinducedhSKPscellsasshownbyreversetranscription-polymerasechainreaction(RT-PCR)technologywasalsodemonstrated.ThepresenceofthesemarkersatbothgeneandproteinlevelscouldleadtoourconclusionthatthedirectionaltransdifferentiationofhSKPscellsintocornealepithelialcellswassuccessfullydoneunderthiscellinductionprotocol.Thefindingshowsanewlyavailablestemcellsourcecanbeobtainedfromeasilyavailableskin.Cellsfromautologoushumanskinmightbeusedforcornealdisordertreatmentinfutureclinicalapplication.
简介:目的调查上海市奉贤区奉城镇60岁以上老年人群干眼的患病率及相关影响因素。方法2013年6~12月对上海市奉贤区奉城镇60岁以上人群采用随机整群分组抽样法,进行问卷调查,对有阳性症状的受检者做裸眼视力、裂隙灯、基础泪液分泌试验(SⅠt)、泪膜破裂时间(BUT)、角膜荧光素染色(FL)、睑板腺功能检查。结果随机抽取受检者2387例,实际受检者2058例,应答率为86.2%。受检者中干眼患者295例,患病率为14.3%,女性患病率为18.0%(208/1153),男性患病率为9.6%(87/905),女性高于男性(χ^2=29.22,P〈0.05);80岁以上人群的干眼患病率为21.3%,70~79岁为15.8%,60~69岁为9.2%(χ^2=36.61,P〈0.005)。结论上海市奉贤区奉城镇60岁以上人群中,女性的干眼患病率高于男性。干眼患病率随年龄增长而升高,眼干涩、视疲劳、异物感为最常见症状,局部及全身多种因素均影响干眼的发生。干眼的社区防治对郊区眼病防治工作有着重要的意义。
简介:AIM:Toestablishanuntransfectedhumancornealstromal(HCS)celllineandcharacterizeitsbiocompatibilitytoacellularporcinecornealstroma(aPCS).·METHODS:PrimaryculturewasinitiatedwithapurepopulationofHCScellsinDMEM/F12media(pH7.2)containing20%fetalbovineserumandvariousnecessarygrowthfactors.Theestablishedcelllinewascharacterizedbygrowthproperty,chromosomeanalysis,tumorigenicityassay,expressionofmarkerproteinsandfunctionalproteins.Furthermore,thebiocompatibilityofHCScellswithaPCSwasexaminedthroughhistologicalandimmunocytochemistryanalysesandwithlight,electronmicroscopies.·RESULTS:HCScellsproliferatedtoconfluence2weekslaterinprimarycultureandhavebeensubculturedtopassage140sofar.AcontinuousuntransfectedHCScelllinewithapopulationdoublingtimeof41.44hoursatpassage80hasbeendetermined.Resultsofchromosomeanalysis,morphology,combinedwiththeresultsofexpressionofmarkerproteinandfunctionalproteinssuggestedthatthecellsretainedHCScellproperties.Furthermore,HCScellshavenotumorigenicity,andwithexcellentbiocompatibilitytoaPCS.·CONCLUSION:Anuntransfectedandnon-tumorigenicHCScelllinehasbeenestablished,andthecellsmaintainedpositiveexpressionofmarkerproteinsandfunctionalproteins.Thecellline,withexcellentbiocompatibilitytoaPCS,mightbeusedforinvitroreconstructionoftissue-engineeredHCS.
简介:AIM:Toinvestigatethediffusioncharacteristicsofwaterofopticnerveandopticradiationinhealthyadultsanditsrelatedfactorsbydiffusiontensorimaging(DTI)at3T.METHODS:Atotalof107healthyvolunteersperformedheadconventionalMRIandbilateralopticnerveandopticradiationDTI.TheprimarydataofDTIwasprocessedbypost-processingsoftwareofDTIstudio2.3,obtainingfractionalanisotropyvalue,meandiffusivityvalue,principalenginevalue,orthogonalenginevaluebymeasuring,andanalyzedbytheSPSS13.0statisticalsoftware.RESULTS:Thebilateralopticnerveandopticradiationfiberspresentedgreencolorindirectionalencodedcolor(DEC)mapsandpresentedhighsignalinfractionalanisotropy(FA)maps.TheFAvalueoftheleftopticnervewas0.598±0.069andtherightwas0.593±0.065;themeandiffusivity(MD)valueoftheleftopticnervewas(1.324±0.349)×10-3mm2/sandtherightwas(1.312±0.350)x10-3mm2/s;theprincipalenginevalue(λ?)oftheleftopticnervewas(2.297±0.522)×10-4mm2/sandtherightwas(2.277±0.526)×10-3mm2/s;theorthogonalenginevalue(λ⊥)oftheleftopticnervewas(0.838±0.285)×10-3mm2/sandtherightwas(0.830±0.280)×10-3mm2/s;theFAvalueoftheleftopticradiationwas0.636±0.057andtherightwas0.628±0.056;themeandiffusivity(MD)valueoftheleftopticradiationwas(0.907±0.103)×10-3mm2/sandtherightwas(0.889±0.125)×10-3mm2/s;theprincipaleigenvalue(λⅡ)oftheleftopticradiationwas(1.655±0.210)×10-3mm2/sandtherightwas(1.614±0.171)×10-3mn2/s;theorthogonalenginvalue(λ⊥)oftheleftopticradiationwas(0.531±0.103)×10-3mm2/sandtherightwas(0.524±0.152)×10-3m
简介:目的:评价Shotfile老视切削模式治疗近视伴老视患者的远期临床疗效。方法:对我院43例82眼35岁及以上近视屈光不正患者行激光角膜手术,采用Shotfile老视切削模式,随访3a。观察术后1、2、3a时的裸眼远、近视力和屈光度变化、视觉满意度情况。结果:术后la裸眼远视力达到术前最佳矫正视力者81眼(99%),裸眼近视力在0.66以上者75眼(91%),等效球镜平均为-0.64±0.63D,总体满意率为91%;术后2a裸眼远视力达到术前最佳矫正视力者79眼(96%),裸眼近视力在0.66以上者69眼(84%),等效球镜平均为-0.62土0.59D,总体满意率为86%;术后3a裸眼远视力达到术前最佳矫正视力者77眼(94%),裸眼近视力在0.66以上者62眼(76%),等效球镜平均为-0.55±0.56D,总体满意率为81%。所有人选病例均未出现术中或术后严重并发症,1眼等效球镜为-10.00D的患者la后出现-1.75D的回退,尊重患者意愿为患者进行二次补矫。结论:Shotfile老视切削模式治疗近视伴老视患者远期疗效安全稳定,患者满意度较高,随时间延长部分患者视近能力逐渐减弱,术前应与患者进行充分沟通。