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:ToinvestigatetheroleofRho-associatedproteinkinase(ROCK)inhibitor,Y27632,inmediatingtheproductionofextracellularmatrix(ECM)componentsincludingfibronectin,matrixmetallo-proteinase-2(MMP-2)andtypeIcollagenasinducedbyconnectivetissuegrowthfactor(CTGF)ortransforminggrowthfactor-β(TGF-β)inahumanretinalpigmentepithelialcellline,ARPE-19.METHODS:TheeffectofY27632ontheCTGForTGF-βinducedphenotypeinARPE-19cellswasmeasuredwithimmunocytochemistryasthechangeinF-actin.ARPE-19cellsweretreatedwithCTGF(1,10,100ng/mL)andTGF-β(10ng/mL)inserumfreemedia,andanalyzedforfibronectin,laminin,andMMP-2andtypeIcollagenbyRT-qPCRandimmunocytochemistry.CellswerealsopretreatedwithanROCKinhibitor,Y27632,toanalyzethesignalingcontributingtoECMproduction.·RESULTS:TreatmentofARPE-19cellsinculturewithTGF-βorCTGFinducedanECMchangefromacobblestonemorphologytoamoreelongatedswirlpatternindicatingamesenchymalphenotype.RT-qPCRanalysisanddifferentgeneexpressionanalysisdemonstratedanupregulationinexpressionofgenesassociatedwithcytoskeletalstructureandmotility.CTGForTGF-βsignificantlyincreasedexpressionoffibronectinmRNA(P=0.006,P=0.003respectively),lamininmRNA(P=0.006,P=0.005),MMP-2mRNA(P=0.006,P=0.001),COL1A1mRNA(P=0.001,P=0.001),COL1A2mRNA(P=0.001,P=0.001).PreincubationofARPE-19withY27632(10mmol/L)significantlypreventedCTGForTGF-βinducedfibronectin(P=0.005,P=0.003respectively),MMP-2(P=0.003,P=0.002),COL1A1(P=0.006,P=0.003),andCOL1A2(P=0.006,P=0.004)geneexpression,butnotlaminin(P=0.375,P=0.516).CONCLUSION:OurstudydemonstratedthatbothTGF-βandCTGFupregulatetheexpressionofECMcomponentsincludingfibronectin,laminin,MMP-2andtypeIcollagenbyactivatingtheRhoA/ROCKsignalingpathway.Duringthisprocess,ARPE-19cellswereshowntochangefromanepithelialtoamesenchymalphenotypeinvi

简介：目的：研究在高糖诱导人晶状体上皮细胞向间充质转化的过程中JAK-STAT通路的作用及AG490对此过程的影响。方法：低糖（5.5mmol/L）DMEM培养液体外培养人晶状体上皮细胞系SRA01/04。高糖（30.5mmol/L）处理细胞,按照是否加入AG490及其浓度的不同分为实验组和对照组。CCK-8试剂盒检测晶状体上皮细胞的活性,选择实验组AG490浓度为10μmol/L和50μmol/L,处理时间分别为6,12,24和48h；细胞划痕实验检测细胞迁移能力的变化；RT-PCR方法半定量检测TGF-β1,FN和α-SMA的mRNA表达量变化。结果：在不同的处理时间（6,12,24,48h）,高糖组（HG组）与低糖组相比,细胞的迁移能力增加（P〈0.05）,TGF-β1,FN和α-SMA表达量增高（P〈0.05）；AG490组与HG组相比,细胞的迁移能力降低（P〈0.05）,TGF-β1,FN和α-SMA的mRNA表达量下降。结论：JAK-STAT通路通过影响TGF-β1和细胞外基质转录表达参与了高糖诱导的人晶状体上皮细胞向间充质转化的过程。JAK抑制剂AG490对此过程有抑制作用,且随着AG490浓度的增加其抑制作用增强。

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）在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。

简介：目的研究视网膜色素上皮(retinalpigmentepithelium,RPE)细胞中端粒酶逆转录酶(telomerasereversetranscriptase,TERT)表达及其反义寡核苷酸(antisenseolgonucleotides,ASODN)对其表达和细胞增生的抑制作用,为增生性玻璃体视网膜病变(prliferativevitreoretinopathy,PVR)治疗探索基因治疗新途径.方法体外培养兔眼RPE细胞,在不同时间采用链霉亲合素-生物素化过氧化物酶复合物(strepoavidin-biotin-enzymecomplex,SABC)免疫组织化学法检测TERT的表达;不同浓度的TERTASODN和正义寡核苷酸(senseoligodeoxynucleotides,SODN)分别作用于体外培养的RPE细胞,采用免疫组织化学方法检测TERT的表达;四唑盐比色法(MTT)检测在不同浓度的TERTASODN和SODN作用下RPE细胞生长活性及其生长抑制率.结果体外培养兔眼RPE细胞可表达TERT,在5,10μmo/LASODN作用下,TERT的表达明显受抑制;TERTASODN能明显抑制RPE细胞增生活性,并呈剂量依赖性.结论TERTASODN能序列特异性地抑制RPE细胞TERT表达和增生活性.