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:AIM:Toassesstheawarenessofeyecomplicationsandtheprevalenceofretinopathy,inthefirstvisittoeyeclinic,amongtype2diabeticpatientsattendingatertiarymedicalcentreinKualaLumpur,Malaysia.METHODS:Aninvestigator-administeredquestionnairewasgivento137patientswithdiabetesundergoingfirsttimeeyescreeningintheeyeclinic.Thiswasfollowedbyadetailedfundusexaminationbyaseniorophthalmologisttoassessforpresenceofretinopathy.RESULTS:Almost86%ofrespondentswereawareofdiabeticeyecomplications,especiallyinpatientswhohadachievedtertiaryeducationallevel(96.3%).Themajorityofthepatients(78.8%)werereferredbytheirphysiciansandonly20.4%cameontheirowninitiative.Manyofthepatients(43.8%)didnotknowhowfrequenttheyshouldgoforaneyecheck-upand72.3%didnotknowwhattreatmentswereavailable.Lackofunderstandingondiabeticeyediseases(68.6%)wasthemainbarrierformostpatientsfornotcomingforeyescreeningearlier.Despiteahighlevelofawareness,only21.9%hadrecordedHbA1clevelof<6.5%while31.4%wereundertheerroneousassumptionofhavingagoodbloodsugarcontrol.Atotalof29.2%haddiabeticretinopathyintheirfirstvisiteyetesting.CONCLUSION:Inthepresentstudy,29.2%oftype2diabeticpatientshadretinopathyintheirfirsttimeeyetesting.Althoughtheawarenessofdiabeticeyecomplicationswashighamongfirsttimeeyescreeningpatients,theappropriateeyecare-seekingbehaviorwascomparativelylessandshouldberectifiedtopreventtheriseofthissightthreateningeyedisease.
简介:亚洲神经眼科协会(ASNOS)于2002年在日本东京成立。由亚洲神经眼科协会每两年主办一次的亚洲神经眼科大会是一个大型国际神经眼科会议,代表了亚洲神经眼科基础研究及临床研究的最高水平。历届会议都有数百名各国神经眼科专业人士进行学术交流,对国际最近神经眼科新技术及学术前沿进行介绍及讨论。亚洲神经眼科大会提供了一个国际化平台,让世界各地的参会者对前沿的神经眼科研究课题交流想法,探讨最新进展及促进未来的合作。在亚洲神经眼科大会中一个尤其出名且重要的病例讨论版块“WalshinAsia”,选取各国出色的带病理结果的病例进行深入剖析,非常具有挑战性。
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:目的探讨基层医院白内障手术从现代囊外摘除术(ECCE)到超声乳化术(phacoemulsification)的过渡.方法对有EccE手术经验的医生,通过130目艮动物实验后,进行100例老年性白内障Phaco带教培训.结果术后1天视力≥0.3者94%,≥0.5者83%;术后3月视力≥0.3者96%,≥0.5者90%,人工晶体植入率100%,无角膜失代偿、核坠落、视网膜脱落等严重并发症,实现了从ECCE到Phaco的安全过渡.结论基层医生只要以严谨、积极的科学态度进行学习,有扎实的显微手术基础,严格选择病例,配以良好的设备,强调规范化操作,同样能成功地完成转化过程,开展较高质量的白内障超声乳化手术.
简介:目的探讨医院及家庭联合治疗大龄儿童弱视的临床效果。方法选择7~15岁的大龄儿童73例(113眼),采用医院及家庭联合实施弱视综合疗法对患儿进行治疗,并对临床资料进行总结、分析。结果113眼中有96眼有效,总有效率84.96%,其中基本痊愈61眼(53.98%)、进步35眼(30.97%)、无效17眼(15.93%)。17例无效眼中,屈光度超过±10.00D者6眼、斜视伴双眼无同视功能5眼、眼颤者1眼、散光超过4.00D者2眼、家庭不配合未坚持治疗者3眼。轻、中度弱视的疗效优于重度弱视;中心注视的疗效优于旁中心注视。结论医院及家庭联合治疗大龄儿童弱视能取得满意疗效,需要医务人员、家属和儿童的共同配合。只有充分调动弱视患儿成长环境中关系密切的群体力量,才能提高其治疗效果。因此对大龄儿童的弱视治疗,除科学、系统及规范的治疗外,还应积极地提高家庭支持度。
简介:AIM:Todemonstratethemorphologyandstructureofinvitroreconstructedtissue-engineeredhumancornealepithelium(TE-HCEP)withseedercellsfromanuntransfectedHCEPcellline.·METHODS:TheTE-HCEPswerereconstructedinvitrowithseedercellsfromanuntransfectedHCEPcellline,andscaffoldcarriersofdenudedamnioticmembrane(dAM)inair-liquidinterfaceculturefor3,5,7and9days,respectively.Thespecimenswereexaminedwithhematoxylin-eosin(HE)stainingofparaffin-section,immunocytochemicalstaining,scanningandtransmissionelectronmicroscopy.·RESULTS:DuringinvitroreconstructionofTE-HCEP,HCEPcellsformeda3-4,6-7and8-10layersofanHCEP-likestructureondAMsinair-liquidinterfaceculturefor3,5and7days,respectively.Butthecellsdeceasedto5-6layersandthestructureofstraifiedepitheliumbecamelooseatday9.Andthecellsmaintainedpositiveexpressionofmarkerproteins(keratin3andkeratin12),cell-junctionproteins(zonulaoccludens-1,E-cadherin,connexin43andintegrinβ1)andmembranetransportproteinofNa+-K+ATPase.TheHCEPcellsinTE-HCEPwererichinmicrovillionapicalsurfaceandestablishednumerouscell-cellandcell-dAMjunctionsatday5.·CONCLUSION:ThemorphologyandstructureofthereconstructedTE-HCEPweresimilartothoseofHCEPinvivo.TheHCEPcellsinthereconstructedTE-HCEPmaintainedthepropertiesofHCEPcells,includingabilitiesofformingintercellularandcell-extracellularmatrixjunctionsandabilitiesofperformingmembranetransportation.TheuntransfectedHCEPcellsanddAMscouldpromisinglybeusedinreconstructionHCEPequivalentforclinicalcornealepitheliumtransplantation.
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:目的探讨基层医院小切口非超声乳化白内障囊外摘除联合人工晶体植人手术技巧。方法我院2005年8月至2014年5月采用小切口非超声乳化白内障囊外摘除联合人工晶体植入257例(263眼),对其术后视力及术中、术后并发症进行临床分析。结果术后出院视力均有不同程度的提高,视力低于0.1者6只眼,占2%,0.1~0.3者19只眼,占7%,0.3~0.5者84只眼,占32%,0.5~0.8者115只眼,占44%,0.8以上者39只眼,占15%。7-10天复诊视力进一步提高。结论小切口非超声乳化白内障囊外摘除联合人工晶体植入手术疗效显著,实用性强,易于操作,成本低,非常适合在基层医院推广。
简介:目的探讨基层医院开展高龄老人白内障超声乳化吸除术应注意的问题,手术难点及处理对策,旨在减少手术并发症,提高成功率。方法对109只眼,75—84岁老人白内障超声乳化吸除术作回顾性总结和分析。结果术后一周视力0.5以上68只眼,占63%。视力0.1—0.3者14只眼,占13%。0.3—0.5者23只眼,占21%。4只眼未脱盲,占3%术中并发症为后囊破裂,未发生核坠入玻璃体,无严重全是并发症发生,术后并发症主要是角膜水肿,未发生大泡性角膜炎。结论本组病例疗效满意。无严重并发症发生。手术成功的关键是要充分了解高龄白内障老人眼部及全身生理特点,对各种手术并发症的原因和表现有清醒的认识,具备扎实的手术操作技巧。
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。