简介：糖尿病视网膜病变（DR）是作为一种常见的糖尿病并发症，对其发病机制的研究一直是关注的焦点。经典的糖尿病视网膜病变的发病机制假说集中与多元醇通路的异常、蛋白质非酶糖基化产物的堆积、蛋白激酶C及氨基己糖途径有关。聚腺苷二磷酸核糖聚合酶（PARP）作为统一机制中的一个关键分子，与DR发病机制及其防治密不可分，对其进行适当干预，可成为DR治疗的重要方法之一。

简介：目的研究高眼压及其持续时间对大鼠视网膜caspase-3表达的影响。方法通过前房灌注平衡盐液建立大鼠急性高眼压模型：高眼压持续时间均为4h，依据眼内压的不同将sD大鼠60只随机分为正常对照组、40mmHg（1mmHg=0．133kPa）组、60mmHg组、80mmHg组、100mmHg组，每组12只。将眼内压为80mmHg的48只sD大鼠随机分为正常对照组、2h组、4h组、8h组，每组12只。正常对照组不给予前房灌注，其他各组分别给予不同的高眼压或高眼压持续不同时间。各组灌注结束后快速摘除眼球，分别采用Western印迹法和免疫组织化学法检测视网膜caspase-3的表达。结果与对照组相比，40mmHg组大鼠视网膜caspase-3的表达无增加（P〉0．05）；60mmHg组、80mmHg组和100mmHg组大鼠视网膜caspase-3的表达均强于正常对照组（q值分别为4．87、5．28和6．71；P〈0．01），但各组之间差异无统计学意义（P〉0．05）。与对照组相比，2h组大鼠视网膜caspase-3的表达差异无统计学意义（P〉0．05），4h组和8h组大鼠视网膜caspase-3的表达均增加（q值分别为2．81和3．67；P〈0．01）。表达caspase-3的视网膜细胞主要位于神经节细胞层、外丛状层和内丛状层。结论采用前房灌注平衡盐液制作急性高眼压模型研究高眼压大鼠视网膜caspase-3的表达时，眼内压为80mmHg、高眼压持续4h即可。

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

简介：目的：观察小牛血去蛋白提取物眼用凝胶对复发性翼状胬肉术后角膜切口修复的应用疗效。方法：将68例68眼行复发性翼状胬肉术后发生角膜切口水肿的患者随机分为2组,每组34例。对照组常规应用双氯芬酸钠滴眼液加抗生素滴眼液同时加用贝复舒滴眼液交替点眼,4次/d。治疗组除每日应用双氯芬酸钠滴眼液加抗生素滴眼液交替点眼外,使用小牛血去蛋白提取物眼用凝胶,4次/d,疗程1mo,于用药前和用药后3,7,14d;1mo分别对患者主觉症状、体征、角膜切口修复情况进行对比分析。结果：复发性翼状胬肉术后3,7,14d,治疗组角膜切口水肿较对照组明显消退,切口修复较快,主觉症状在短时间消退,术后1mo,两组无显著性差异。结论：小牛血去蛋白提取物眼用凝胶对复发性翼状胬肉术后角膜切口的早期修复起效时间短、舒适度好、安全性良好,对减少术后感染性角膜病的发生及术后角膜散光有良好的作用。

简介：AIM:Toinvestigatetheaccuracyofintraocularpressure(IOP)asmeasuredbyaReichertOcularResponseAnalyzer(ORA),aswellastherelationshipbetweencentralcornealthickness(CCT)andIOPasmeasuredbyORA,Goldmannapplanationtonometry(GAT),anddynamiccontourtonometry(DCT).·METHODS:Atotalof158healthyindividuals(296eyes)werechosenrandomlyformeasurementofIOP.AfterCCTwasmeasuredusingA-ultrasound(A-US),IOPwasmeasuredbyORA,GAT,andDCTdevicesinarandomizedorder.TheIOPvaluesacquiredusingeachofthethreetonometrieswerecompared,andtherelationshipbetweenCCTandIOPvalueswereanalyzedseparately.TwoIOPvalues,Goldmann-correlatedIOPvalue(IOPg)andcorneal-compensatedintraocularpressure(IOPcc),weregotusingORA.ThreegroupsweredefinedaccordingtoCCT:1)thincornea(CCT<520μm);2)normal-thicknesscornea(CCT:520-580μm);and3)thickcornea(CCT>580μm)groups.·RESULTS:Innormalsubjects,IOPmeasurementswere14.95±2.99mmHgwithORA(IOPg),15.21±2.77mmHgwithORA(IOPcc),15.22±2.77mmHgwithGAT,and15.49±2.56mmHgwithDCT.Meandifferenceswere0.01±2.29mmHgbetweenIOPccandGAT(P>0.05)and0.28±2.20mmHgbetweenIOPccandDC(P>0.05).TherewasagreatercorrelationbetweenIOPccandDCT(r=0.946,P=0.000)thanthatbetweenIOPccandGAT(r=0.845,P=0.000).DCThadasignificantcorrelationwithGAT(r=0.854,P=0.000).GATwasmoderatelycorrelatedwithCCT(r=0.296,P<0.001),whileIOPccshowedaweakbutsignificantcorrelationwithCCT(r=0.155,P=0.007).TherewasastrongnegativecorrelationbetweenCCTandthedifferencebetweenIOPccandGAT(r=-0.803,P=0.000),withevery10increaseinCCTresultinginanincreaseinthisdifferenceof0.35mmHg.Thethickcorneagroup(CCT>580μm)showedtheleastsignificantcorrelationbetweenIOPccandGAT(r=0.859,P=0.000);whilethethincorneagroup(CCT<520μm)hadthemostsignificantcorrelationbetweenIOPccandGAT(r=0.926,P=0.000).ThecorrelateddifferencesbetweenIOPccan