人原代晶体上皮细胞bFGF多肽和mRNA的表达

目的 为研究后发性白内障的发生机理,检测生长中人晶体上皮细胞（ＨＬＥＣｓ）自身是否表达碱性成纤维细胞生长因子（ｂＦＧＦ）。方法 体外培养人晶体上皮细胞,用免疫细胞化学和原位核酸分子杂交的方法,检测ＨＬＥＣｓ中ｂＦＧＦ多肽和其ｍＲＮＡ的表达。结果 用免疫细胞化学和原位核酸分子杂交方法,可检测到生长中的人晶体上皮细胞自身表达碱性成纤维细胞生长因子。结论 结合碱性成纤维细胞生长因子促进人晶体上皮细胞生长     

生长因子与晶体上皮细胞

白内障在致盲眼病的发生率中占首位。随着白内障囊外摘除术及人工晶体植入术的广泛开展 ,术后患者短期内视力可提高至较可观的水平。但术后 4 0 %的成年人和几乎 10 0 %的儿童发生晶体后囊混浊 (后发性白内障 ) ,导致视力再度下降。残留的晶体上皮细胞增殖是其形成原因。近年来的研究表明生长因子在促进晶体上皮细胞增殖、迁移、分化方面发挥着重要作用〔1～ 3〕。本文就生长因子与晶体上皮细胞的关系作一综述。一、生长因子概述生长因子是机体在有丝分裂原作用下 ,由体细胞产生的 ,在体内和体外对细胞的生长具有促进或抑制作用的物质。除促…     

表皮生长因子对晶体上皮细胞增殖影响的研究

目的 评价表皮生长因子对晶体上皮细胞增殖的影响。方法 在培养的牛和人晶体上皮细胞中添加ＥＧＦ,甲基噻唑基四唑法测定细胞增殖情况以及一抗体对ＥＧＦ作用的影响。结果ＥＧＦ浓度为１０＾－１－１０＾２μｇ／Ｌ对牛晶体上皮细胞增殖有促进作用,其中浓度为１０μｇ／Ｌ作用３天达到最大促增殖效果;ＥＧＦ浓度为１－１０＾２μｇ／Ｌ对人晶体上皮细胞增殖有促进作用,浓度为１０＾２μｇ／Ｌ具有最大促增殖效果。抗ＥＧＦＲ抗     

转化生长因子β及其对晶体上皮细胞的作用

本文综述转化生长因子β（ＴＧＦ－β）在细胞中的表达和激活过程，ＴＧＦ－β具有的生物学功能，及其在眼内不同细胞的分布。特别介绍了ＴＮＦ－β对晶体上皮细胞的作用。     

人晶体上皮细胞的体外培养

目的:提供一种简单可行,易于掌握的体外培养人晶体上皮细胞的方法。方法:用无齿显微镊子将晶体囊膜分离出来,剪碎后直接移至细胞培养瓶中培养,当细胞长出融合后,用胰蛋白酶消化传代。结果:接种培养4天后,可见晶体上皮细胞开始长出,并以贴壁方式生长。结论:用此方法体外培养人晶体上皮细胞,具有简单、快捷、成功率高的优点。眼科学报1997;13:170—172。     

牛晶体上皮细胞Ⅰ,Ⅲ型前胶原mRNA表达的研究

后囊膜混浊是白内障囊外摘除术后的常见并发症之一，其发生的病理基础是因晶体上皮细胞的残留，进而增殖、基底膜样物质的复制以及胶原的沉积［１］。研究晶体上皮细胞的生物学特性已成为阐述后囊膜混浊病理发生机制的重要内容。我们对晶体上皮细胞在生理状态下是否能够合...     

表皮生长因子对人视网膜色素上皮细胞Cx43mRNA表达的影响

目的:观察表皮生长因子(epidermalgrowthfactor,EGF)对培养的人视网膜色素上皮(retinapigmentepitheliumcell,RPE)细胞中缝隙连接蛋白Cx43蛋白及mRNA的表达影响。方法:不同浓度的EGF作用于培养的第4代人的RPE细胞24h,采用Westernblot的方法测定Cx43的蛋白;原位杂交观察Cx43mRNA在RPE细胞中的表达特点;RT-PCR实验对EGF影响后的RPE细胞的mRNA进行半定量观察。结果:Westernblot试验证实不同浓度的EGF均可使Cx43蛋白表达量明显减少,并且与EGF的浓度呈正相关,原位杂交显示所有细胞均表达Cx43mRNA,其表达部位主要在细胞质和核;RT-PCR实验对mRNA进行半定量观察显示表皮生长因子使RPE细胞的mRNA表达量明显减少。结论:EGF可以下调Cx43蛋白及Cx43mRNA在人RPE细胞中的表达。     

碱性成纤维细胞生长因子受体mRNA基因在人晶体上皮细胞内的检测研究

为研究碱性成纤维细胞生长因子（ｂａｓｉｃｆｉｂｒｏｂｌａｓｔｇｒｏｗｔｈｆａｃｔｏｒ,ｂＦＧＦ）对晶体上皮细胞促增殖作用的机理,采用原位杂交,用合成的寡核苷酸探针来检测人晶体上皮细胞内的ｂＦＧＦ高亲和力受体—成纤维细胞生长因子受体１（ｆｉｂｒｏｂｌａｓｔｇｒｏｗｔｈｆａｃｔｏｒｒｅ－ｃｅｐｔｏｒ１,ＦＧＦＲ１）的ｍＲＮＡ基因,并用图像分析进行相对定量。结果：表明了人晶体上皮细胞表达ＦＧＦＲ１的ｍＲＮＡ基因。结论：人晶体上皮细胞存在ＦＧＦＲ１,当ｂＦＧＦ与其高亲和力受体结合后,对促进晶体上皮细胞的增殖以及白内障术后后囊混浊的形成具有重要作用。     

碱性成纤维细胞生长因子及其对晶体上皮细胞增殖的促进作用

本介绍了碱性成纤维细胞生长因子的分布和来源，阐述其基本特性及主要的生物学功能。探讨ｂＦＧＦ对眼晶体上皮细胞的增殖促进作用和后囊混浊的发病机理以及ｂＦＧＦ的作用机制。     

阿霉素对兔晶体上皮细胞凋亡的诱导

细胞凋亡是一种细胞生理性死亡，当细胞受到特异性刺激后，启动内在“自杀”程序而引起的一种控制性死亡方式，又称程序性死亡。我们通过体外培养兔晶体上皮细胞（ｒａｂｂｉｔｌｅｎｓｅｐｉｔｈｅｌｉａｌｃｅｌ，ＲＬＥＣ）方法，首次从诱导细胞凋亡角度观察阿霉素对体...     

Adenovirus-mediated gene transfer to human lens epithelial cells in organ culture

PURPOSE: To assess the feasibility of using recombinant adenovirus vectors to transduce the human lens epithelial cells (LECs) involved in posterior capsule opacification (PCO). SETTING: Department of Ophthalmology and Molecular Medicine Unit, University of Manchester, Manchester, United Kingdom. METHODS: Seventeen human lens capsules were maintained in organ culture to allow LECs to proliferate onto the posterior capsule. Partly covered and completely covered capsules were infected with a recombinant adenovirus vector RAd35, encoding for the marker gene beta-galactosidase at plaque-forming units per milliliter (pfu/mL) ranging from 10(7) to 10(10) for up to 48 hours. Assessment of infection and transduction of the marker gene were achieved by calculating the percentage of cells exhibiting X-gal staining both macroscopically and microscopically. RESULTS: Staining appeared to be dependent on virus dose, with most intense staining at doses of 10(8) and 10(9) pfu/mL with decreased staining at higher and lower viral doses. Microscopic assessment demonstrated that all cells expressed beta-galactosidase when infected with 10(9) pfu, 84% at 10(8) pfu, and 45% at 10(7) pfu. At 10(10) pfu, some cytotoxicity was observed. CONCLUSIONS: These results indicate that recombinant adenoviruses can be used to transfer genes to the LECs involved in PCO. The transfer of cytotoxic genes after cataract surgery may be considered a preventive measure for PCO.     

人晶状体上皮细胞的组织块培养

目的建立人晶状体上皮细胞体外培养的简单有效方法,观察不同年龄人晶状体上皮细胞的体外生长规律和特点。方法应用改良组织块培养法对胎儿、成人和年龄相关性白内障的晶状体上皮细胞进行体外培养,在倒置显微镜下观察其生长、分化规律。结果胎儿、成人和年龄相关性白内障晶状体上皮细胞都具有增殖能力,胎儿和成人晶状体上皮细胞可传3代,年龄相关性白内障晶状体上皮细胞传代培养基本不能增殖。结论人晶状体上皮细胞体外培养困难,不同年龄人晶状体上皮细胞体外均能增殖,但增殖能力均很有限;改良组织块培养法是晶状体上皮细胞体外培养的较好方法。     

高糖对人晶状体上皮细胞凋亡相关基因表达的影响

目的 通过检测高糖对人晶状体上皮细胞凋亡相关基因表达的影响,从基因角度探讨糖尿病患者白内障高发的机制.方法 体外培养人晶状体上皮细胞系,用不同浓度的葡萄糖孵育后,用四甲基偶氮唑盐比色法检测人晶状体上皮细胞活性,用荧光定量PCR方法检测多种凋亡相关基因的表达变化.结果 在以含不同浓度葡萄糖培养基培养细胞24 h后,发现晶状体上皮细胞活性在不同浓度的葡萄糖条件下产生明显变化,在葡萄糖浓度小于25.5 mmol·L-1时,晶状体上皮细胞增殖活力有少许提高,而当培养基中葡萄糖浓度大于35.5 mmol·L-1时,细胞增殖活力明显下降且呈刺量依赖性.同时该浓度下葡萄糖能够诱导多个凋亡相关基因高表达,其中凋亡基因p53和c-myc表达变化趋势与葡萄糖呈剂量依赖性,结果具有统计学意义(P＜0.05).结论 葡萄糖对人晶状体上皮细胞活性影响随浓度的改变而变化.高浓度下葡萄糖可通过诱导凋亡基因p53和C-myc高表达从而导致细胞凋亡.     

碱性成纤维细胞生长因子基因在人晶状体上皮细胞内的表达

目的:为研究碱性成纤维细胞生长因子(basic fibroblast growth factor,bFGF)基因在人晶状体上皮细胞(human lens epithelial cell,HLEC)内表达情况。方法:采用原位杂交方法,用cDNA探针检测HLEC内bFGF mRNA的表达,并用图像分析进行相对定量。结果:HLEC内可检测到bFGF mRNA的表达。结论:HLEC内存在bFGF基因表达。     

Morphological appearances of human lens epithelial cells in culture

A system for culturing human lens epithelial cells in the laboratory was developed. The morphological appearances of the cells was studied using phase contrast, scanning and transmission electron microscopy. Cell marker studies using monoclonal antibodies to cyto-keratin, vimentin and epithelial membrane antigen were also performed. There was a marked increase in cell size as a function of time in culture. After 3 to 4 weeks cells showed early signs of ageing. By 6 to 8 weeks the majority of the cells had become very irregular in shape and demonstrated irregularities of the plasma membrane and intra-cytoplasmic vacuole formation. The cells stained strongly for vimentin and epithelial membrane antigen. Staining with cytokeratin was somewhat weaker. This culture technique provides us with a suitable model for studying the growth behavior of these cells.Presented in part at the 10th Congress of the Society of European Cataract and Refractive Surgeons, Paris, September 1992.     

Growth characteristics of human lens epithelial cells in culture

The effect of different concentrations of fetal calf serum (FCS) on the proliferative capacity of human and bovine lens epithelial cells in culture was evaluated. The effect of donor age on the maximum number of passages achieved using thirty eight individual cultures was also studied. The donor ages ranged from 1–88 years. Fifteen percent FCS was found to be the optimum concentration for both human and bovine cells. The two cell types demonstrated very similar responses across the spectrum of concentrations used. Correlation analysis revealed a significant (p < 0.05) negative correlation between donor age and maximum number of cell passages achieved.