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Involvement of Rho-associated coiled-coil kinase signaling inhibition in TGF-β1/Smad2,3 signal transduction in vitro 被引量:4
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作者 Zhao-Hui Feng Xiao-Hui Zhang +1 位作者 Jia-Qi Zhao Jun-Ze Ma 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2017年第12期1805-1811,共7页
AIM:To research the effect of Y-27632,a selective Rhoassociated coiled-coil kinase(ROCK) inhibitor,on TGF-β1/Smad2,3 signal transduction in ocular Tenon's capsule fi broblasts(OTFs).METHODS:Primary ocular Teno... AIM:To research the effect of Y-27632,a selective Rhoassociated coiled-coil kinase(ROCK) inhibitor,on TGF-β1/Smad2,3 signal transduction in ocular Tenon's capsule fi broblasts(OTFs).METHODS:Primary ocular Tenon's capsule fibroblasts had been cultured in vitro.The effect of Y27632 on proliferation of OTF stimulated by lysophosphatidic acid(LPA) was evaluated by MTT colorimetric assay so as to sift out the proper concentrations range of Y-27632 for the next experiment.Real time-polymerase chain reactor(RT-PCR) was to analyze the changes of Smad2 and Smad3 genes of cells affected by Y-27632,though unaffected by transforming growth factorbeta1(TGF-β1).Proteins of Smad2,Smad3,phosphorylated Smad2(Ser245/250/255),and phosphorylated Smad3(Ser423/425/203) were respectively quantifi ed by Western blot after OTFs were successively incubated by TGF-β1 and Y-27632.Meanwhile,α-smooth muscular actin(α-SMA) protein was also quantified after the small intervening gene fragments of human Smad2 and Smad3 were designed,synthesized,and then transfected to OTFs.RESULTS:Y-27632 signifi cantly inhibited OTFs proliferation stimulated by LPA.Also Y-27632 signifi cantly suppressed the expressions of Smad2 m RNA,Smad2,3 proteins expressions,Smad3 phosphorylation at the carboxylic terminals of Ser423/425/203 which had been radically promoted by TGF-β1.Si RNA-Smad2,3 suppressed α-SMA expressions,but less effectively than Y-27632.CONCLUSION:The inhibition of ROCK signaling may be a potential therapeutic candidate for the treatment of the fi ltration channel fi brosis. 展开更多
关键词 ROCK Y-27632 transforming growth factor-betal Smad human ocular Tenon's capsule fibroblasts
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Inhibitory Effect of Dexamethasone on TGF-β1 Expression of Rabbit Ciliary Pigment Epithelia Cultured in Vitro
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作者 熊新春 席祖莲 +4 位作者 苗娟 李庆林 张海江 胡义珍 魏厚仁 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2006年第3期369-371,共3页
In order to elucidate the effect of dexamethasone on the expression of transforming growth factor-betal (TGF-β1) in ciliary pigment epithelial (CPE) cells cultured in vitro, rabbit CPE cells were cultured in vitr... In order to elucidate the effect of dexamethasone on the expression of transforming growth factor-betal (TGF-β1) in ciliary pigment epithelial (CPE) cells cultured in vitro, rabbit CPE cells were cultured in vitro, treated with DMEM medium containing 0, 1 × 10^-8 , 5 × 10^-8 , 10 × 10^-8 and 50 × 10^-8 mol/L dexamethasone respectively for 5 days. The TGF-131 expression was detected by immunohistochemistry Supervision methods and analyzed semi-quantitatively by HMIAS-2000 image system. As opposed to in vivo, rabbit CPE cells expressed TGF-131 under cul- tured circumstance in vitro. The gray scales of the positive yellow staining in the groups of 1 × 10^-8 , 5 × 10^-8 , 10 × 10^-8 and 50 × 10^-8 mol/L dexamethasone were 136.57 ± 4.43, 140.20 ± 6. 10, 142. 98± 2. 99, 146.80±1.68 and 150.05 × 1.94 respectively. When the concentrations of dexamethasone were equal to or higher than 5 × 10^-8mol/L and, the expression of TGF-β1 was inhibited. 10^-7 mol/L dexamethasone showed a significant inhibition. It was suggested that CPE cells possess the potential ability of synthesizing and expressing TGF-β1. The inhibition of TGF-β1 expression by dexamethasone may be beneficial to the treatment of proliferative vitroretinopathy, also exert some influence on the secretion of aqueous humor and ciliary inflammation. 展开更多
关键词 ciliary pigment epithelium transforming growth factor-betal DEXAMETHASONE
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IL-5 Up-regulates the Expression of TGF-β1 in Human Blood Eosinophils in Vitro
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作者 黄亚冰 刘斌 +4 位作者 王璐 李荣 朱珉 陈栋 陈实 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2005年第6期665-667,共3页
To investigate the effects of IL-5 on the expression of TGF-β1 in eosinophils in vitro, eosinophils were incubated in the presence of the same concentrations of IL-4, IL-5 and IFNγ, different concentrations of IL-5 ... To investigate the effects of IL-5 on the expression of TGF-β1 in eosinophils in vitro, eosinophils were incubated in the presence of the same concentrations of IL-4, IL-5 and IFNγ, different concentrations of IL-5 in yitro and changes of eosinophil viability were assessed by trypan blue exclusion. Non-cytokine was employed as a negative control. 16 h after the cultivation, supernatants and cells were assayed by using TGF-β1 specific ELISA and RT-PCR. The mRNA expression and protein expresssion of TGF-β1 in eosinophils stimulated with different eytokines was observed. The expression of TGF-β1 protein in eosinophils was increased significantly by IL-4 (433. 67 ±9.86 vs 228.9±2.87) and IL-5 (403.7±7.60 vs 228.9±2.87, P〈0.05), while decreased by IFNγ (178. 47±2. 60 vs 228.9±2.87). At the same time, the results demonstrated that the basal level of TGF expression was enhanced by IL-5 in all samples (P〈0.05). The expression of TGF-β1 mR- NA was 1.42, 1.70, 1.76-folds higher than that of the non-stimulated controls. It is concluded that IL-5 can up-regulate the expression of TGF-β1 in eosinophils in vitro, which might have effect in eosinophil-associated chronic rejection. 展开更多
关键词 IL-5 transforming growth factor-betal (TGF-β1)
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Association between Genetic Variants of Transforming Growth Factor-β1 and Susceptibility of Pneumoconiosis: A Meta-analysis 被引量:8
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作者 Chang-Wen Deng Xing-Xing Zhang +3 位作者 Jin-Huan Lin Li-Fei Huang Yu-Lan Qu Chong Bai 《Chinese Medical Journal》 SCIE CAS CSCD 2017年第3期357-364,共8页
Background: Transforming growth factor-beta 1 (TGF-β 1) and gene variants have been extensively studied in various human diseases. For example, TGF-β1 polymorphisms were associated with fibrosis and pneumoconiosi... Background: Transforming growth factor-beta 1 (TGF-β 1) and gene variants have been extensively studied in various human diseases. For example, TGF-β1 polymorphisms were associated with fibrosis and pneumoconiosis, but the data remained controversial. The aim of this meta-analysis was to assess the association between TGF-β1-509 C〉T [rs 1800469], +869 T〉C [rs 1800470], and +915 G〉C [rs 1800471 ] polymorphisms and pneumoconiosis, Methods: A comprehensive literature search was conducted through searching in PubMed, Embase, the Chinese Biomedical Database, and the Wei Pu (Chinese) Database by the end of April 2016. Eleven publications with 21 studies were included in this recta-analysis, covering a total of 4333 patients with pneumoconiosis and 3478 controls. Study quality was assessed, and heterogeneity and publication bias were measured. All statistical analyses were performed using STATA version 12.0 (StataCorp, College Station, TX, USA) software. Results: The data showed significant associations between TGF-β1-509 C〉T polymorphism and the risk ofpneumoconiosis development (T vs. C, odds ratio [OR] = 1.35, 95% confidence interval [CI]: 1.00-1.81, P = 0.046); between TGF-fll +915 G〉C polymorphism and the pneumoconiosis risk (C vs. G, OR = 1.69, 95% CI: 1.19-2.40, P = 0.004; CG vs. GG, OR = 1.79, 95% CI: 1.23-2.60, P = 0.002; CC+CG vs. GG, OR = 1.80, 95% CI: 1.24-2.61, P = 0.002). In addition, the subgroup analysis of ethnicity versus pneumoconiosis types indicated a significant association of silicosis among Asian populations but not that of coal workers' pneumoconiosis in Caucasian populations. In contrast, no significant association was exhibited between TGF-β1 +869 T〉C polymorphism and risk ofpneumoconiosis. Conclusion: The polymorphisms of both TGF-β1 -509 C〉T and +915 G〉C are associated with increased risk of pneumoconiosis. Key words: Meta analysis; Pneumoconiosis; Polymorphism; Transforming Growth Factor-betal 展开更多
关键词 Meta analysis PNEUMOCONIOSIS POLYMORPHISM Transforming growth factor-betal
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塞来昔布上调梗阻肾cAMP水平抑制结缔组织生长因子的表达 被引量:1
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作者 肖厚勤 张建鄂 +6 位作者 丁国华 张永 王晓勋 刘志祥 张庆红 李涛 乐发国 《中国医师杂志》 CAS 2005年第9期1171-1174,共4页
目的探讨环氧合酶-2在单侧输尿管梗阻(UUO)大鼠模型的表达及选择性环氧合酶-2(COX-2)抑制剂塞来昔布对UUO大鼠结缔组织生长因子表达的影响。方法将UUO大鼠随机分为:C:模型对照组,B:布洛芬组,R:塞来昔布组,S:假手术组。B组给予布洛芬300m... 目的探讨环氧合酶-2在单侧输尿管梗阻(UUO)大鼠模型的表达及选择性环氧合酶-2(COX-2)抑制剂塞来昔布对UUO大鼠结缔组织生长因子表达的影响。方法将UUO大鼠随机分为:C:模型对照组,B:布洛芬组,R:塞来昔布组,S:假手术组。B组给予布洛芬300mg·Kg-1·d-1,R组给予塞来昔布10mg·Kg-1·d-1,C组、S组每日给予等体积的生理盐水于造模前一天至造模后14d灌胃,分别于UUO后3、6、14d分批处死,逆转录聚合酶链式反应(RT-PCR)检测COX-1、COX-2、TGF-β1、CTGF的mRNA表达,免疫组化技术检测TGF-β1、CTGF、α-SMA的蛋白水平,放免法检测组织内cAMP的水平。结果与S组相比,UUO后C组COX-2、TGF-β1、CTGF的基因表达显著上调,cAMP的水平下降(UUO3dP<0.05,UUO6d、14dP<0.001)。布洛芬对梗阻肾TGF-β1、CTGF表达及组织内cAMP水平均无显著影响,塞来昔布对梗阻肾TGF-β1的表达无显著改变,但能升高组织内cAMP水平,抑制CTGF的表达,纤维化程度减轻。结论COX-2的产物是导致肾小管间质损伤的重要原因,选择性COX2抑制剂可能部分通过升高组织内cAMP的水平来抑制TGF-β1的下游因子CTGF的表达延缓肾间质纤维化。 展开更多
关键词 环氧合酶-2 转化生长因子β1 结缔组织生长因子 塞来昔布 单侧输尿管梗阻 肾小管间质损伤 cAMP P水平 选择性COX2抑制剂 上调
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Effect of ursodeoxycholic acid on TGF betal/Smad signaling pathway in rat hepatic stellate cells 被引量:23
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作者 LIANG Tie-jun YUAN Jun-hua +5 位作者 TAN Yan-rong REN Wan-hua HAN Guo-qing ZHANG Jie WANG Lai-cheng QIN Cheng-yong 《Chinese Medical Journal》 SCIE CAS CSCD 2009年第10期1209-1213,共5页
Background Hepatic fibrosis is the key stage of the pathological progress from hepatic injury to cirrhosis. Ursodeoxycholic acid (UDCA) has been known as having significant clinical therapeutic effects on chronic li... Background Hepatic fibrosis is the key stage of the pathological progress from hepatic injury to cirrhosis. Ursodeoxycholic acid (UDCA) has been known as having significant clinical therapeutic effects on chronic liver diseases. Our research aimed to study the effect of UDCA on the signaling pathway of transforming growth factor beta1 (TGFβ1)/Smad and discuss its possible molecular mechanisms of inhibiting hepatic fibrosis. Methods Rat hepatic stellate cells were cultured in vitro and randomly assigned to 4 groups. Group A was control group with only DMEM culture medium applied, and groups B, C, D were experimental groups, with different doses of UDCA (1.0 mmol/L, 0.5 mmol/L and 0.25 mmol/L respectively) added into their DMEM culture medium for further culture of 24 hours and 48 hours. The protein expressions of TGFβ1, TGF type 1 receptor, Smad3, Smad4 and Smad7 were measured by Western blotting, as well as the expressions of TGFβ1, Smad3, Smad7 and cAMP response element (CREB) binding protein (CBP) mRNA by real-time PCR. SPSS 11.5 statistical package was adopted for data analyses. Results Compared with control group, the mRNA expressions of TGFβ1 in the high and middle UDCA dose groups for 24 hours and 48 hours significantly decreased (P 〈0.05), the protein expressions of TGFβ1 in the two above groups for 48 hours and in the high dose group for 24 hours significantly decreased (P 〈0.05). The protein and mRNA expressions of Smad3 in each UDCA dose group for 24 hours and 48 hours significantly decreased, with significant difference among different UDCA dose groups and between that of 24 hours and 48 hours observed (P 〈0.05). The protein and mRNA expressions of Smad7 in the high and middle UDCA dose groups for 24 hours and 48 hours significantly increased. The CBP mRNA expression in each UDCA dose group for 24 hours and 48 hours significantly decreased (P 〈0.05), with significant difference among different UDCA dose groups observed (P 〈0.05). Conclusion UDCA could curb the development of hepatic fibrosis through affecting the signaling pathway of TGFβ1/Smad by inhibiting the expressions of TGFβ1, Smad3 and CBP and increasing the expression of Smad7. 展开更多
关键词 ursodeoxycholic acid hepatic stellate cells transforming growth factor-betal/Smad signaling pathway
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