β-catenin在翼状胬肉成纤维细胞中的表达

目的:β-catenin在正常的细胞粘附和wnt信号通路中发挥重要功能,本文探讨其在翼状胬肉组织及成纤维细胞中的表达及TGF-β1对其的影响。方法:通过组织块培养获取正常球结膜和翼状胬肉成纤维细胞并传至第4代,用10μg/LTGF-β1作用于细胞。抗β-catenin抗体对体内取出组织和培养的细胞行免疫组化染色;免疫印迹法检测培养成纤维细胞中β-catenin的表达情况。结果:免疫组化显示翼状胬肉成纤维细胞中β-catenin阳性着色强于正常结膜成纤维细胞。β-catenin在胬肉组织中较多,且多分布于上皮下纤维血管组织,上皮染色较少。体外培养见翼状胬肉成纤维细胞的生长较正常结膜成纤维细胞快、增殖能力强。免疫印迹法显示在翼状胬肉成纤维细胞蛋白中β-catenin的特异性阳性条带灰度值高于正常球结膜成纤维细胞蛋白。TGF-β1能促进翼状胬肉成纤维细胞中的β-catenin蛋白表达。结论:β-catenin在翼状胬肉组织及其成纤维细胞中的表达增高,提示β-catenin与翼状胬肉的发病有关。     

层黏连蛋白对人翼状胬肉成纤维细胞生长的抑制作用

目的:探讨层黏连蛋白对体外培养的人翼状胬肉成纤维细胞增殖的影响.方法:体外培养的第3代翼状胬肉成纤维细胞,接种于层黏连蛋白包被培养皿(Ln组)和空白培养皿(对照组)中,倒置显微镜观察细胞生长状态,MTT法检测细胞增殖状态,作出生长曲线;免疫荧光法检测α-SMA在细胞内的表达;RT-PCR法检测TGF-β1和cytokeratin mRNA的表达水平.结果:Ln组成纤维细胞数量少于对照组;3～7 d,Ln组A570明显低于对照组(0.20 vs 0.28,0.22 vs 0.30,0.28 vs0.34,0.31 vs0.36,0.33 vs 0.36,P＜0.05);α-SMA在对照组细胞内表达良好,在Ln组的表达受到抑制;与对照组相比,Ln组TGF-β1 mRNA的表达下降,cytokeratin mRNA表达增加.结论:层黏连蛋白能抑制翼状胬肉中成纤维细胞的增殖.     

汉防己甲素对翼状胬肉成纤维细胞抑制作用的实验研究

目的观察汉防己甲素对体外培养的翼状胬肉成纤维细胞的抑制作用，寻找治疗翼状胬肉和预防其复发的有效药物。方法用MTT比色法测定不同浓度的汉防己甲素对体外培养的翼状胬肉成纤维细胞增生的抑制作用，并与丝裂霉素C（MMC）进行比较；用荧光定量PCR检测10^-5mol／L的汉防己甲素对翼状胬肉成纤维细胞基质金属蛋白酶（MMP）MMP-3 mRNA的表达的影响。结果不同浓度的汉防己甲素对体外培养的翼状胬肉成纤维细胞的增生均有明显的抑制作用（P〈0．01）；10^-5mol／L的汉防己甲素作用24h其MMP-3 mRNA的表达量下降了27．12％。结论汉防己甲素对翼状胬肉成纤维细胞具有明显的抑制作用，可望用于对翼状胬肉的治疗。     

粉防己碱对翼状胬肉成纤维细胞增生作用的研究(英文)

目的:观察粉防己碱(tetrandrine,Tet)对体外培养人翼状胬肉成纤维细胞(human pterygium fibroblast,HPF)增殖的影响,研究粉防己碱对翼状胬肉成纤维细胞增殖的作用,寻找辅助治疗翼状胬肉的新方法。方法:用不同浓度(0 ～160μmol/L)Tet作用体外培养的HPF,观察24 ～96h Tet对HPF的影响。MTT法检测细胞生长抑制率,免疫细胞化学法检测Tet干预前后HPF增殖细胞核抗原(PCNA)的表达情况。结果:在Tet20, 40, 80, 160μmol/L浓度作用24 ～72h范围内,可剂量和时间依赖性的抑制HPF增生(P<0.05)。Tet干预后PCNA蛋白表达下降,当Tet的浓度在20 ～160μmol/L范围内能浓度依赖性地抑制细胞表达PCNA(P<0.05)结论:Tet可显著抑制翼状胬肉成纤维细胞增生,在一定浓度和时间范围内抑制作用呈剂量与时间依赖性。但在高浓度时( >160μmol/L)可能存在细胞毒性作用。     

汉防己甲素对翼状胬肉成纤维细胞基质金属蛋白酶的影响

目的:观察汉防己甲素(Tet)对翼状胬肉成纤维细胞基质金属蛋白酶(MMP)分泌及表达的影响.方法:收集正常球结膜与初发翼状胬肉成纤维细胞培养的上清液,ELISA法检测两种细胞培养上清液中MMP-1,MMP-3,MMP-9的含量及10-5mol/L的Tet作用48h翼状胬肉成纤维细胞培养的上清液中含量的变化.荧光定量PCR检测10-5mol/L的Tet对翼状胬肉成纤维细胞MMP-3mRNA表达的影响.结果:培养的初发翼状胬肉成纤维细胞上清中MMP-1,MMP-3含量较正常成纤维细胞上清中含量高[MMP-1:26928±1135→3148±74(ng/L),MMP-3:52593±1031→12490±3126(ng/L),P＜O.01],加入10-5 mol/LTet作用48h后明显下降[MMP-1:26928±1135→15064±533(ng/L),MMP-3:52593±1031→29943±561(ng/L),P＜O.01].培养的正常结膜及初发翼状胬肉成纤维细胞上清中未检测到MMP-9.初发翼状胬肉成纤维细胞MMP-3 mRNA是正常结膜组织成纤维细胞的3倍,10-5mol/L的Tet作用24h后表达量下降了27.1%.结论:Tet对翼状胬肉成纤维细胞MMP-1,MMP-3的分泌有明显的抑制作用,并能抑制其细胞MMP-3 mRNA表达量.     

重组人干扰素α1b滴眼液对体外培养翼状胬肉成纤维细胞增殖的影响

目的：观察重组人干扰素α1b滴眼液对体外培养翼状胬肉（初发、复发）成纤维细胞增殖的影响，寻找辅助治疗翼状胬肉和预防翼状胬肉复发的药物。方法：将初发、复发翼状胬肉成纤维细胞行原代和传代培养；用MTT比色法测定重组人干扰素α1b滴眼液对体外培养初发、复发翼状胬肉成纤维细胞增殖的作用；采用免疫组化法检测重组人干扰素α1b滴眼液对体外培养初、复发翼状胬肉成纤维细胞的增殖细胞核抗原（PCNA）表达的影响。结果：重组人干扰素α1b滴眼液与对照组相比，对初、复翼状胬肉成纤维细胞的增殖影响具有统计上的差异，对细胞的增殖具有抑制作用，同时重组人干扰素α1b滴眼液对初、复发翼状胬肉成纤维细胞PCNA的表达具有抑制作用。结论；重组人干扰素α1b滴眼液作为一种成品滴眼液对初、复发翼状胬肉成纤维细胞的增殖具有明显的抑制作用，可望用于临床上对该疾病治疗。     

NF -κB抑制剂吡咯烷二硫氨基甲酸对人翼状胬肉成纤维细胞增殖的影响

目的:研究(nuclear factor,NF)2κB抑制剂吡咯烷二硫氨基甲酸(NF-B Inhibitor pyrrolidine dithiocarbamate,PDTC)对体外培养人翼状胬肉成纤维细胞(human pterygium fibroblast,HPF)增殖的影响,寻找辅助治疗和预防翼状胬肉复发的新方法.方法:取人翼状胬肉标本进行体外贴壁细胞常规培养,取第3～6代细胞进行试验.(1)免疫组化法染色结合细胞生物学特征鉴定成纤维细胞;(2)不同浓度PDTC(2.5,5,10,20,40 μmol/L)干预成纤维细胞24,48,72 h后,MTT法检测细胞生长抑制率;(3)免疫细胞化学法分别检测PDTC干预48 h后HPF增殖细胞核抗原(PCNA)的表达情况.结果:体外培养的翼状胬肉细胞经免疫组化染色可见波形蛋白表达阳性,结合细胞生物学特性可以确定为成纤维细胞.MTT实验表明,随着PDTC干预浓度的增大和时间延长,成纤维细胞生长抑制率增加(P＜0.05),在2.5-40 μmol/L浓度作用24-72 h,PDTC可呈剂量和时间依赖性.PDTC干预后PCNA蛋白表达均下降.当PDTC的浓度在5,10,20,40 μmol/L范围内能浓度依赖性地抑制细胞表达PCNA(P＜0.05).结论:PDTC对体外培养的HPF细胞有抑制作用,在一定浓度和时间范围内抑制作用呈剂量与时间依赖性.     

姜黄素对人翼状胬肉成纤维细胞增殖和凋亡及迁移的影响

目的:探讨姜黄素对体外培养的人翼状胬肉成纤维(HPF)细胞增殖和凋亡及迁移的影响。方法:收集我院2021-11-24/12-16手术切除的翼状胬肉组织7例,进行原代成纤维细胞体外培养,并采用免疫荧光染色法进行细胞鉴定。采用含等量二甲基亚砜的0、10、20、40、80、160μmol/L姜黄素处理HPF细胞24h后,用CCK8法检测细胞增殖情况。根据CCK8检测结果将细胞分为对照组(不含姜黄素)、20μmol/L姜黄素组、40μmol/L姜黄素组,每组分别处理HPF细胞24h。采用流式细胞仪检测细胞凋亡,Transwell迁移实验检测细胞迁移,实时荧光定量PCR法和Western blot法检测Bax、Bcl-2、Cyclin D1及MMP2的mRNA与蛋白表达。结果:与对照组相比,20μmol/L姜黄素组和40μmol/L姜黄素组均能抑制HPF细胞的增殖和迁移,并诱导其凋亡(均P<0.05)。与对照组相比,20μmol/L姜黄素组能下调Cyclin D1及MMP2,上调Bax的mRNA表达,下调Bcl-2的蛋白表达(均P<0.05)。与对照组相比,40μmol/L姜黄素组能...     

汉防己甲素抑制翼状胬肉成纤维细胞增殖的研究

目的:观察汉防己甲素对体外培养的翼状胬肉成纤维细胞增殖抑制作用并探讨其机制,寻找治疗翼状胬肉和预防其复发的有效药物.方法:(1)倒置相差显微镜下观察不同浓度的Tet作用下,体外培养的翼状胬肉成纤维细胞形态的变化,并与丝裂霉素(Mitomycin,MMC)进行比较.(2)MTT比色法测定不同浓度的Tet作用48h对体外培养的翼状胬肉成纤维细胞增殖的抑制作用,并与MMC进行比较.(3)流式细胞仪检测不同浓度的Tet作用48h,体外培养的翼状胬肉成纤维细胞细胞周期的变化.结果:(1) Tet作用下,细胞胞体收缩,变圆,间隙增宽,药物浓度高时,细胞碎裂,浮起.0.1,0.2g/L MMC作用下大量细胞碎裂,溶解.(2)不同浓度的Tet作用48h对体外培养的翼状胬肉成纤维细胞的增殖均有明显的抑制作用(P＜0.01);0.1g/L与0.2g/L MMC、4×10-5 mol/L Tet与0.2g/L MMC对翼状胬肉成纤维细胞活性的影响无显著性差异(P＞0.05).Tet的IC50接近10-5mol/L(为0.848×10-5mol/L).(3)Tet作用下,翼状胬肉成纤维细胞周期中S期细胞增多,浓度越高,作用越明显.结论:汉防己甲素对翼状胬肉成纤维细胞的增殖具有明显的抑制作用,呈剂量依赖性,细胞分裂被阻止在S期(DNA合成期).可望用于对翼状胬肉的治疗.     

锗132对体外培养翼状胬肉成纤维细胞的增殖抑制作用观察

观察锗１３２对体外培养翼状胬肉成纤维细胞的抗增殖作用,寻找辅助治疗翼状胬肉和预防翼状胬肉复发的新方法。方法将翼状胬肉成纤维细胞行体外原代和传代培养;观察不同浓度锗１３２及丝裂霉素Ｃ对成纤维细胞生长曲线的影响及培养的翼状胬肉成纤维细胞增殖抑制作用和毒性作用;采用免疫组织化学方法检测增殖细胞核抗原（ｐｒｏｌｉｆｅｒａｔｉｎｇ ｃｅｌｌ ｎｕｃｌｅａｒ ａｎｔｉｇｅｎ,ＰＣＮＡ）的表达,结果锗１３２可抑     

Overexpression of Insulin-like growth factor-binding protein-2 in pterygium body fibroblasts

PURPOSE: To examine the expression pattern of insulin-like growth factor-binding protein (IGFBP)-2 in cultured primary pterygium fibroblasts and compare it with expression in normal conjunctival fibroblasts. METHODS: Profile of gene expression by normal conjunctival and primary pterygium fibroblasts was performed by using a cDNA microarray. The overexpression of IGFBP-2 thus identified was further confirmed by RT-PCR and Western blot analysis of cultured cells and by immunohistochemistry on primary pterygium and normal conjunctival tissue sections. RESULTS: A dramatically increased expression of IGFBP-2 mRNA was demonstrated in cDNA microarray membranes from two different pterygium fibroblasts. This finding was confirmed by RT-PCR in four additional different pterygium fibroblasts and by Western blot analysis of their culture supernatants. Immunohistochemistry of frozen sections from primary pterygium demonstrated increased staining in extracellular matrix of the stroma, compared with that of the normal conjunctiva. IGFBP-2 was also found in goblet cells of both normal conjunctival and pterygium epithelia. CONCLUSIONS: The increased expression of IGFBP-2 mRNA and protein in pterygium fibroblasts is further strong evidence to support the transformed phenotype of these cells and helps explain why there is increased growth of fibrovascular tissue. This phenotype may be used as a marker to assess the malignant nature of pterygium growth and recurrence.     

Expression of insulin-like growth factor binding protein-3 in pterygium tissue

BACKGROUND: Pterygium is a fibrovascular overgrowth from the conjunctiva onto the cornea. The pathogenesis of this common ocular surface disorder is not well understood and the only treatment is surgical removal. METHODS: DNA microarray analysis of primary pterygium tissue was carried out using uninvolved conjunctiva tissue as a comparison for gene expression levels. Real time polymerase chain reaction (PCR) was used to verify the mRNA level of expression for genes changed in pterygium. Western blot analysis and immunohistochemistry showed protein expression levels and the tissue distribution. RESULTS: Microarray analysis revealed that mRNA levels of a number of genes were changed in primary pterygium. In particular the gene for insulin-like growth factor binding protein-3, (IGFBP3), which modulates the effects of insulin-like growth factor on cells was significantly decreased. Both the message and protein expression of IGFBP3 in pterygium were decreased compared to normal, uninvolved conjunctiva. CONCLUSION: Decreased levels of IGFBP3 protein have been strongly correlated with the presence of cancer. Identification of the low level of expression of IGFBP3 in pterygium suggests that the pathway controlling cell proliferation has lost an important control mechanism, which may explain the continued growth of pterygium.     

HSP47 siRNA对体外培养HTCF细胞生物学行为及TGF-β1表达水平的影响

目的:探究热休克蛋白47(HSP47)siRNA对体外培养人眼Tenon囊成纤维(HTCF)细胞生物学行为及转化生长因子-β1(TGF-β1)表达水平影响。方法:体外培养HTCF细胞,并分为:空白对照组、空载体组和转染组;转染组根据HSP47基因序列设计并合成干扰siRNA序列,构建载体并导入HTCF细胞中;空载体组导入空白载体。采用RT-PCR和蛋白质印迹实验检测细胞中HSP47 mRNA和蛋白的表达情况,采用克隆形成实验、流式细胞术、Transwell法及划痕实验检测细胞增殖、凋亡、侵袭及迁移,蛋白质印迹实验检测增殖、凋亡、侵袭、迁移蛋白和TGF-β1的表达情况。结果:相比空载体组,转染组HSP47 mRNA和蛋白的表达、克隆形成率、细胞愈合率、侵袭细胞数目、Ki67、N-cadherin、TGF-β1蛋白相对表达水平显著降低(P<0.05),E-cadherin蛋白相对表达水平显著升高(P<0.05),但细胞凋亡率、Bcl-2和Bax蛋白相对表达水平均无差异(P>0.05)。结论:HSP47 siRNA可以通过抑制TGF-β1蛋白的表达降低HTCF细胞的增殖、侵袭及迁移能力,但对HTCF细胞的凋亡无明显影响。     

UVB-elicited induction of MMP-1 expression in human ocular surface epithelial cells is mediated through the ERK1/2 MAPK-dependent pathway

PURPOSE: Pterygia are common, frequently recurring ocular surface lesions characterized by tissue remodeling, cellular proliferation, angiogenesis, and inflammation. The increased incidence of pterygia in persons exposed to excessive solar radiation suggests that ultraviolet (UV) light may play a critical role in the pathogenesis of this disease. These investigations were focused on the expression of collagenase-1 (matrix metalloproteinase [MMP]-1) in pterygia and cultured pterygium epithelial cells, to determine whether the expression of this protease could be modified after exposure to UVB. METHODS: Pterygium, conjunctival, and limbal epithelial cells were subcultured and exposed to various amounts of UVB. The conditioned medium and RNA were harvested for analysis by gelatin zymography, Western blot analysis, ELISA, and RT-PCR. Furthermore, whole pterygium specimens were irradiated to determine secreted MMP-1 levels. RESULTS: Immunohistochemical analysis revealed enhanced MMP-1 expression in pterygia that corresponded precisely with p63-positive epithelial cells. In contrast, significantly less MMP-1 reactivity was found in normal conjunctiva, limbus, and cornea. A dose- and time-dependent increase in MMP-1 was observed when pterygium epithelial cells were exposed to UVB with no significant modulation of inhibitor activity. MMP-1 was not affected in irradiated normal conjunctival epithelial cells or in pterygium fibroblasts but was induced in limbal epithelial cells. Although the induction of MMP-1 after UVB was not mediated by an intermediate soluble factor, the extracellular signal-regulated kinase (ERK)1/2 mitogen-activated protein kinase (MAPK) intracellular pathway was involved. CONCLUSIONS: Collectively, these data support the hypothesis of the involvement of UV light and MMPs in the development of pterygia and may assist in devising new therapeutic approaches for the treatment and prevention of pterygia.     

The role of substance P in the pathogenesis of pterygia

PURPOSE: Pterygium is a prevalent ocular surface disorder thought to be triggered by chronic ultraviolet damage to the limbus. One of the enigmatic features of pterygium is its wing-like shape, and the mechanism(s) supporting its centripetal growth remain to be elucidated. Because the growth pattern of pterygia mirrors the radial arrangement of corneal nerves, the authors propose that neuropeptides may facilitate its directional growth. This hypothesis prompted an investigation of the role of the sensory neuropeptide substance P (SP) and its receptor (NK(1) receptor) in directing cell migration in pterygia that may explain the characteristic growth pattern. METHODS: Immunohistochemical analysis for SP and the NK(1) receptor was performed on five pterygium specimens with corresponding autologous conjunctiva and limbus. Migration of pterygium epithelium, fibroblasts, and vascular endothelial cells toward SP was assessed by using a modified Boyden chamber. RESULTS: SP and NK(1) receptors were localized to infiltrating fibroblasts, mononuclear cells and the epithelia of pterygium, conjunctiva, and limbus, with elevated NK(1) receptor staining observed in pterygia. SP at nanomolar concentrations induced cell migration in pterygium fibroblasts and vascular endothelium in a dose-dependent fashion, which was inhibited by an NK(1) receptor antagonist. Pterygium epithelial cells were not migratory in these experiments. CONCLUSIONS: For the first time, this study showed the presence of NK(1) receptor in pterygia and that SP is a potent chemoattractant for pterygium fibroblasts and vascular endothelial cells, implying that SP may contribute to the shape of pterygia through its profibrogenic and angiogenic action.     

翼状胬肉细胞之间的相互作用

目的探讨翼状胬肉中血管内皮细胞和成纤维细胞之间的相互作用。方法收集翼状胬肉标本,采用血管内皮细胞和成纤维细胞单独培养、条件培养和共同培养的方法构建培养体系,采用ELISA和RT—PCR法检测3种体系培养上清液和细胞中血管内皮细胞生长因子（VEGF）、碱性成纤维细胞生长因子（bFGF）蛋白及mRNA含量的变化。结果单独培养、条件培养和共同培养各组培养上清液中VEGF和bFGF的质量浓度增加,差异均有统计学意义（P〈0．05）;细胞单独培养、条件培养和共同培养三者相比,VEGF和bFGF的mRNA表达升高,差异均有统计学意义（P〈0．05）。结论内皮细胞和成纤维细胞有相互上调作用,2种细胞在翼状胬肉的发生发展过程中相互促进。