The effect of vascular endothelial growth factor (VEGF) overexpression on matrix metalloproteinase-2 (MMP-2) in nasopharyngeal carcinoma (NPC) cells in vitro and the possible mechanism involved were investigated...The effect of vascular endothelial growth factor (VEGF) overexpression on matrix metalloproteinase-2 (MMP-2) in nasopharyngeal carcinoma (NPC) cells in vitro and the possible mechanism involved were investigated, and the correlation between the expression of VEGF and MMP-2 in NPC evaluated. The NPC cells were transfected with PAd-trackVEGF165 plasmid. The expression levels of VEGF and MMP-2 mRNA and protein in NPC cells were detected by semi-quantitative RT-PCR and Western blot respectively. It was found that the expression of VEGF and MMP-2 mRNA and protein was significantly increased in NPC cells after transfection of VEGF 165. It was concluded that the expression of VEGF was correlated to the in vitro invasion of NPC cells, and the induction of MMP-2 by VEGF was a key process of NPC cell invasion.展开更多
AIM:To Investigate the effects of transforming growth factorβ2(TGF-β2)and connective tissue growth factor(CTGF)on transdifferentiation of human lens epithelial cells(HLECs)cultured in vitro and synthesis of extracel...AIM:To Investigate the effects of transforming growth factorβ2(TGF-β2)and connective tissue growth factor(CTGF)on transdifferentiation of human lens epithelial cells(HLECs)cultured in vitro and synthesis of extracellular matrix(ECM).METHODS:HLECs were treated with TGF-β2(0,0.5,1.0,5,10μg/L)and CTGF(0,15,30,60,100μg/L)for different times(0,24,48,72h)in vitro and the expression ofα-smooth muscle actin(α-SMA),the main component of the extracellular matrix typeⅠcollagen(Col-1)and fibronectin(Fn)were measured by using real-time polymerase chain reaction(PCR)and western-blot.RESULTS:TGF-β2 and CTGF significantly increased expression ofα-SMA mRNA and protein(P【0.05,P【0.001),Fn mRNA and protein(P【0.001),Col-1 mRNA and protein(P【0.001).TGF-β2 could induce HLECs expression of CTGF mRNA and protein in dosedependent manner(P【0.05,P【0.001).TGF-β2 and CTGF could induce HLECs to expressα-SMA,Fn and Col-1 in time-dependent manner.Each time of TGF-β2and CTGF induced HELCs expression ofα-SMA,Fn,Col-1 mRNA and protein was significant increase compared with control(P【0.05,P【0.001).CONCLUSION:TGF-β2 and CTGF could induce HLECs epithelial mesenchymal transition and ECM synthesis.展开更多
Objective To study the expression of vascular endothelial growth factor (VEGF) and matrix metalloproteinase-2 (MMP-2) in different grade human glioma. To investigate their relation to the pathological grade and invasi...Objective To study the expression of vascular endothelial growth factor (VEGF) and matrix metalloproteinase-2 (MMP-2) in different grade human glioma. To investigate their relation to the pathological grade and invasion of the tumor. Methods The expression of MMP-2 and VEGF were determined by immunohistochemical technique in 48 cases of human glioma and 10 specimens of normal brain tissue. Results The expression levels of MMP-2 and VEGF in human glioma were positively related to tumor grades (P<0.01), and their expressions in the glioma of grade Ⅲ and Ⅳ were significantly different from those in the glioma of grade Ⅰ-Ⅱand normal brain tissue (P<0.01). The expression of MMP-2 was positively correlated to that of VEGF (P<0.01). Conclusion MMP-2 and VEGF were highly expression in human glioma and were positively related to the tumor grades. The synergic interaction of MMP-2 and VEGF promoted the angiogenesis and invasion of human glioma.展开更多
目的:初步探讨基质金属蛋白酶2(matrix metalloproteinase-2,MMP-2)和核因子κB(nuclear factor-κB,NF-κB)p65在柯萨奇病毒B3(CVB3)诱导的小鼠病毒性心肌炎心肌中的表达。方法:6周龄近交系雄性BALB/c小鼠随机分为对照组和病毒性心肌炎...目的:初步探讨基质金属蛋白酶2(matrix metalloproteinase-2,MMP-2)和核因子κB(nuclear factor-κB,NF-κB)p65在柯萨奇病毒B3(CVB3)诱导的小鼠病毒性心肌炎心肌中的表达。方法:6周龄近交系雄性BALB/c小鼠随机分为对照组和病毒性心肌炎组,分别给予0.1 m L PBS和10-5.69TCID50/m L CVB3注射,第4天和第10天各随机取8只小鼠处死并取血和心脏标本。Reed-Muench法测定接种病毒滴度;苏木素伊红(hematoxylin and eosin,HE)染色后光镜观察心肌组织病理学改变;应用免疫组化法(immunohistochemistry,IHC)检测MMP-2和NF-κB p65在心肌组织表达的分布和含量;用Western blot法检测MMP-2、NF-κB p65和IκBα在心肌组织的表达,用ELISA检测血清TNF-α含量的变化。结果:与对照组相比,免疫组化和Western blot实验结果提示病毒性心肌炎小鼠心肌中MMP-2和NF-κB p65的表达显著升高(P<0.05);感染组IκBα的表达呈下降趋势(P<0.05);ELISA结果提示血清TNF-α含量在感染组显著升高,差异有统计学显著性(P<0.05)。结论:病毒性心肌炎小鼠心肌组织中TNF-α、NF-κB p65和MMP-2表达显著上调,可能通过相关机制参与疾病的发生。展开更多
基金This project was supported by grants from National Excellent Young Scientists Foundation of China (No.39925035) the Major Clinical Project of Ministry of Health (No.22012332).
文摘The effect of vascular endothelial growth factor (VEGF) overexpression on matrix metalloproteinase-2 (MMP-2) in nasopharyngeal carcinoma (NPC) cells in vitro and the possible mechanism involved were investigated, and the correlation between the expression of VEGF and MMP-2 in NPC evaluated. The NPC cells were transfected with PAd-trackVEGF165 plasmid. The expression levels of VEGF and MMP-2 mRNA and protein in NPC cells were detected by semi-quantitative RT-PCR and Western blot respectively. It was found that the expression of VEGF and MMP-2 mRNA and protein was significantly increased in NPC cells after transfection of VEGF 165. It was concluded that the expression of VEGF was correlated to the in vitro invasion of NPC cells, and the induction of MMP-2 by VEGF was a key process of NPC cell invasion.
基金National Natural Science Foundation of China(No.81070721)Inernational Exchange Program of Shaanxi Province,China(No.2012kw-31)
文摘AIM:To Investigate the effects of transforming growth factorβ2(TGF-β2)and connective tissue growth factor(CTGF)on transdifferentiation of human lens epithelial cells(HLECs)cultured in vitro and synthesis of extracellular matrix(ECM).METHODS:HLECs were treated with TGF-β2(0,0.5,1.0,5,10μg/L)and CTGF(0,15,30,60,100μg/L)for different times(0,24,48,72h)in vitro and the expression ofα-smooth muscle actin(α-SMA),the main component of the extracellular matrix typeⅠcollagen(Col-1)and fibronectin(Fn)were measured by using real-time polymerase chain reaction(PCR)and western-blot.RESULTS:TGF-β2 and CTGF significantly increased expression ofα-SMA mRNA and protein(P【0.05,P【0.001),Fn mRNA and protein(P【0.001),Col-1 mRNA and protein(P【0.001).TGF-β2 could induce HLECs expression of CTGF mRNA and protein in dosedependent manner(P【0.05,P【0.001).TGF-β2 and CTGF could induce HLECs to expressα-SMA,Fn and Col-1 in time-dependent manner.Each time of TGF-β2and CTGF induced HELCs expression ofα-SMA,Fn,Col-1 mRNA and protein was significant increase compared with control(P【0.05,P【0.001).CONCLUSION:TGF-β2 and CTGF could induce HLECs epithelial mesenchymal transition and ECM synthesis.
文摘Objective To study the expression of vascular endothelial growth factor (VEGF) and matrix metalloproteinase-2 (MMP-2) in different grade human glioma. To investigate their relation to the pathological grade and invasion of the tumor. Methods The expression of MMP-2 and VEGF were determined by immunohistochemical technique in 48 cases of human glioma and 10 specimens of normal brain tissue. Results The expression levels of MMP-2 and VEGF in human glioma were positively related to tumor grades (P<0.01), and their expressions in the glioma of grade Ⅲ and Ⅳ were significantly different from those in the glioma of grade Ⅰ-Ⅱand normal brain tissue (P<0.01). The expression of MMP-2 was positively correlated to that of VEGF (P<0.01). Conclusion MMP-2 and VEGF were highly expression in human glioma and were positively related to the tumor grades. The synergic interaction of MMP-2 and VEGF promoted the angiogenesis and invasion of human glioma.
文摘目的:初步探讨基质金属蛋白酶2(matrix metalloproteinase-2,MMP-2)和核因子κB(nuclear factor-κB,NF-κB)p65在柯萨奇病毒B3(CVB3)诱导的小鼠病毒性心肌炎心肌中的表达。方法:6周龄近交系雄性BALB/c小鼠随机分为对照组和病毒性心肌炎组,分别给予0.1 m L PBS和10-5.69TCID50/m L CVB3注射,第4天和第10天各随机取8只小鼠处死并取血和心脏标本。Reed-Muench法测定接种病毒滴度;苏木素伊红(hematoxylin and eosin,HE)染色后光镜观察心肌组织病理学改变;应用免疫组化法(immunohistochemistry,IHC)检测MMP-2和NF-κB p65在心肌组织表达的分布和含量;用Western blot法检测MMP-2、NF-κB p65和IκBα在心肌组织的表达,用ELISA检测血清TNF-α含量的变化。结果:与对照组相比,免疫组化和Western blot实验结果提示病毒性心肌炎小鼠心肌中MMP-2和NF-κB p65的表达显著升高(P<0.05);感染组IκBα的表达呈下降趋势(P<0.05);ELISA结果提示血清TNF-α含量在感染组显著升高,差异有统计学显著性(P<0.05)。结论:病毒性心肌炎小鼠心肌组织中TNF-α、NF-κB p65和MMP-2表达显著上调,可能通过相关机制参与疾病的发生。