Objective: To discuss the expression and significance of angiostatin, vascular endothelial growth factor and matrix metalloproteinase-9 in the brain tissue of diabetic rats with ischemia reperfusion. Methods: A total ...Objective: To discuss the expression and significance of angiostatin, vascular endothelial growth factor and matrix metalloproteinase-9 in the brain tissue of diabetic rats with ischemia reperfusion. Methods: A total of 60 male Wistar rats were randomly divided into the normal group, sham group, diabetic cerebral infarction group and single cerebral infarction group according to the random number table, with 15 rats in each group. The high sucrose diet and intraperitoneal injection of streptozotocin were performed for the modeling of diabetic rats, while the thread-occlusion method was employed to build the model of cerebral ischemia reperfusion. The immunohistochemical staining was performed to detect the expression of angiostatin, vascular endothelial growth factor(VEGF) and matrix metalloproteinase-9(MMP-9) in the brain tissue. Results: The expression of angiostatin after the reperfusion in the brain tissue of rats in the single cerebral infarction group and diabetic cerebral infarction group was increased 6 h after the reperfusion, reached to the peak on 1 d and then decreased gradually. The expression of angiostatin in the diabetic cerebral infarction group 6 h, 1 d, 3 d and 7 d after the reperfusion was significantly higher than that in the single cerebral infarction group(P<0.05). VEGF began to be increased 1 h after the reperfusion in the single cerebral infarction group and diabetic cerebral infarction group, reached to the peak at 6 h and then decreased gradually. The expression of VEGF in the diabetic cerebral infarction group at each time point after the reperfusion was significantly lower than that in the single cerebral infarction group(P<0.05). MMP-9 began to be be increased 1 h after the reperfusion in the single cerebral infarction group and diabetic cerebral infarction group, reached to the peak on 1 d and then decreased gradually. The expression of MMP-9 in the diabetic cerebral infarction group at each time point after the reperfusion was significantly higher than that in the single cerebral infarction group(P<0.05). Conclusions: The high glucose environment in which the diabetic cerebral infarction is occurred is to induce the formation of MMP-9 at first and then activate and increase the expression of angiostatin. Afterwards, the expression of VEGF is inhibited, resulting in the poor angiogenesis after cerebral infarction, which thus makes the injury of brain tissue after cerebral infarction even worse than the non-diabetes mellitus.展开更多
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
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
Objective： To explore the role of vascular endothelial growth factor-C （VEGF-C） in the process of angiogenesis, lymphangiogenesis and lymphatic metastasis in epithelial ovarian tumors. Methods： In situ hybridizati...Objective： To explore the role of vascular endothelial growth factor-C （VEGF-C） in the process of angiogenesis, lymphangiogenesis and lymphatic metastasis in epithelial ovarian tumors. Methods： In situ hybridization and immunohistochemical staining for VEGF-C were performed in 30 epithelial ovarian carcinomas, 9 borderline tumors and 26 benign tumors. Endothelial cells were immunostained with anti-VEGFR-3 pAb and anti-CD31 mAb, and VEGFR-3 positive vessels and microvessel density （MVD） were assessed by image analysis. Results： VEGF-C mRNA and protein expression were detected in cytoplasm of carcinoma cells. VEGF-C mRNA and protein expression in ovarian epithelial carcinomas were significantly higher than those in borderline tumors and benign tumors （P〈0.05 or P〈0.01）. In ovarian epithelial carcinomas, VEGF-C protein expression, VEGFR-3 positive vessels and MVD were significantly higher in the cases of clinical stage Ⅲ-Ⅳ and with lymph node metastasis than those of clinical stage Ⅰ-Ⅱ and without lymph node metastasis respectively （P〈0.05 or P〈0.01）. VEGFR-3 positive vessels and MVD were significantly higher in VEGF-C protein positive tumors than negative tumors （P〈0.05）. VEGFR-3 positive vessels was significantly correlated with MVD（P〈0.01）. Conclusion： VEGF-C might play a role in lymphatic metastasis via lymphangiogenesis and angiogenesis in epithelial ovarian tumors, and VBEGF-C could be used as a biologic marker of metastasis in ovarian epithelial tumors.展开更多
The long suspicion of the potential harm of carbon dioxide （CO2） pneumoperitoneum exists in laparoscopic cancer surgery. For better understanding of this problem, we targeted this study at the effects of CO2 pneumop...The long suspicion of the potential harm of carbon dioxide （CO2） pneumoperitoneum exists in laparoscopic cancer surgery. For better understanding of this problem, we targeted this study at the effects of CO2 pneumoperitoneum on the invasive ability of ovarian carcinoma cell line and the possible mechanism within it. To study the effects of CO2 pneumoperitoneum on carcinoma cell, SKOV3 cells were divided into 2 groups, respectively exposed to pneumoperitoneal CO2-insuffiation and normal conditions. To study the possible mechanism, SKOV3 cells were divided into 3 groups, one was exposed to CO2 pneumoperitoneum, one to N2 and the other to normal conditions served as control. The in vitro adhesive and invasive ability of the cells was analyzed through 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyl tetrazolium bromide （MTT） assay and Boyden filters metastasis model; the expressions of vascular endothelial growth factor C （VEGF-C） and matrix metalloproteinase 9 （MMP9） were determined by reverse transcription polymerase chain reaction（RT-PCR）, and Western blot. We found that the adhesive ratio of SKOV3 cells exposed to CO2 was significantly higher than that of the control group; cells exposed to CO2 invaded the matrigel with a greater number （P〈0.01）; the expression of VEGF-C exposed to both CO2 and N2 was significantly increased compared with control group （P〈0.05）; the MMP9 expression level of CO2 group was higher than that of N2 group, P〈0.05. We concluded that carbon dioxide pneumoperitoneum may improve the adhesive and invasive ability of ovarian carcinoma cell line in vitro and CO2 can also be an independent factor to stimulate the expression of MMP9.展开更多
[目的]探讨健脾固肾化瘀方联合氯沙坦钾片治疗脾肾两虚夹瘀型糖尿病肾脏病(DKD)的临床疗效以及其对患者血清基质金属蛋白酶-9(MMP-9)、单核细胞趋化因子-1(MCP-1)和血管内皮生长因子(VEGF)水平的影响。[方法]选择沧州中西医结合医院2019...[目的]探讨健脾固肾化瘀方联合氯沙坦钾片治疗脾肾两虚夹瘀型糖尿病肾脏病(DKD)的临床疗效以及其对患者血清基质金属蛋白酶-9(MMP-9)、单核细胞趋化因子-1(MCP-1)和血管内皮生长因子(VEGF)水平的影响。[方法]选择沧州中西医结合医院2019年1月—2021年5月纳入80例脾肾两虚夹瘀型DKD患者作为研究对象,采用随机数字表法分成观察组与对照组各40例。观察组给予健脾固肾化瘀方联合氯沙坦钾片治疗,对照组单用氯沙坦钾片治疗,连续治疗12周后观察两组临床疗效。治疗前后检测受试者血糖[空腹血糖(FPG)、餐后2 h血糖(2 h PG)和糖化血红蛋白(HbA1c)]、血脂[总胆固醇(TC)、三酰甘油(TG)和低密度脂蛋白胆固醇(LDL-C)]及肾功能指标[尿微量白蛋白/尿肌酐比值(UACR)、肌酐(SCr)和尿素氮(BUN)]。选用酶联免疫吸附法测定血清MMP-9、MCP-1和VEGF水平。并统计两组不良反应情况。[结果]观察组总有效率为92.50%(37/40),较对照组72.50%(29/40)有所提高(P<0.05)。两组治疗后FPG、2 h PG和HbA1c均较治疗前降低(P<0.05),且均以观察组的改善更显著(P<0.01)。两组治疗后血清TC、TG和LDL-C浓度均较治疗前下降(P<0.05),且均以观察组的改善更显著(P<0.01)。两组治疗后UAER和血清SCr、BUN水平均较治疗前降低(P<0.05),且均以观察组的改善更显著(P<0.01)。两组治疗后血清MMP-9水平均较治疗前升高(P<0.05),血清MCP-1、VEGF浓度均较治疗前下降(P<0.05);且治疗后,观察组对血清MMP-9水平的升高作用及对血清MCP-1、VEGF水平的降低作用较对照组更显著(P<0.01)。所有患者均无明显不良反应发生。[结论]应用健脾固肾化瘀方联合氯沙坦钾片治疗脾肾两虚夹瘀型DKD能安全有效地上调患者MMP-9表达水平,下调MCP-1、VEGF表达水平,改善肾功能,整体疗效确切。展开更多
基金supported by Shandong Science and Technology Development Plan Project(No.Y2006C02)
文摘Objective: To discuss the expression and significance of angiostatin, vascular endothelial growth factor and matrix metalloproteinase-9 in the brain tissue of diabetic rats with ischemia reperfusion. Methods: A total of 60 male Wistar rats were randomly divided into the normal group, sham group, diabetic cerebral infarction group and single cerebral infarction group according to the random number table, with 15 rats in each group. The high sucrose diet and intraperitoneal injection of streptozotocin were performed for the modeling of diabetic rats, while the thread-occlusion method was employed to build the model of cerebral ischemia reperfusion. The immunohistochemical staining was performed to detect the expression of angiostatin, vascular endothelial growth factor(VEGF) and matrix metalloproteinase-9(MMP-9) in the brain tissue. Results: The expression of angiostatin after the reperfusion in the brain tissue of rats in the single cerebral infarction group and diabetic cerebral infarction group was increased 6 h after the reperfusion, reached to the peak on 1 d and then decreased gradually. The expression of angiostatin in the diabetic cerebral infarction group 6 h, 1 d, 3 d and 7 d after the reperfusion was significantly higher than that in the single cerebral infarction group(P<0.05). VEGF began to be increased 1 h after the reperfusion in the single cerebral infarction group and diabetic cerebral infarction group, reached to the peak at 6 h and then decreased gradually. The expression of VEGF in the diabetic cerebral infarction group at each time point after the reperfusion was significantly lower than that in the single cerebral infarction group(P<0.05). MMP-9 began to be be increased 1 h after the reperfusion in the single cerebral infarction group and diabetic cerebral infarction group, reached to the peak on 1 d and then decreased gradually. The expression of MMP-9 in the diabetic cerebral infarction group at each time point after the reperfusion was significantly higher than that in the single cerebral infarction group(P<0.05). Conclusions: The high glucose environment in which the diabetic cerebral infarction is occurred is to induce the formation of MMP-9 at first and then activate and increase the expression of angiostatin. Afterwards, the expression of VEGF is inhibited, resulting in the poor angiogenesis after cerebral infarction, which thus makes the injury of brain tissue after cerebral infarction even worse than the non-diabetes mellitus.
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.
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Objective： To explore the role of vascular endothelial growth factor-C （VEGF-C） in the process of angiogenesis, lymphangiogenesis and lymphatic metastasis in epithelial ovarian tumors. Methods： In situ hybridization and immunohistochemical staining for VEGF-C were performed in 30 epithelial ovarian carcinomas, 9 borderline tumors and 26 benign tumors. Endothelial cells were immunostained with anti-VEGFR-3 pAb and anti-CD31 mAb, and VEGFR-3 positive vessels and microvessel density （MVD） were assessed by image analysis. Results： VEGF-C mRNA and protein expression were detected in cytoplasm of carcinoma cells. VEGF-C mRNA and protein expression in ovarian epithelial carcinomas were significantly higher than those in borderline tumors and benign tumors （P〈0.05 or P〈0.01）. In ovarian epithelial carcinomas, VEGF-C protein expression, VEGFR-3 positive vessels and MVD were significantly higher in the cases of clinical stage Ⅲ-Ⅳ and with lymph node metastasis than those of clinical stage Ⅰ-Ⅱ and without lymph node metastasis respectively （P〈0.05 or P〈0.01）. VEGFR-3 positive vessels and MVD were significantly higher in VEGF-C protein positive tumors than negative tumors （P〈0.05）. VEGFR-3 positive vessels was significantly correlated with MVD（P〈0.01）. Conclusion： VEGF-C might play a role in lymphatic metastasis via lymphangiogenesis and angiogenesis in epithelial ovarian tumors, and VBEGF-C could be used as a biologic marker of metastasis in ovarian epithelial tumors.
文摘The long suspicion of the potential harm of carbon dioxide （CO2） pneumoperitoneum exists in laparoscopic cancer surgery. For better understanding of this problem, we targeted this study at the effects of CO2 pneumoperitoneum on the invasive ability of ovarian carcinoma cell line and the possible mechanism within it. To study the effects of CO2 pneumoperitoneum on carcinoma cell, SKOV3 cells were divided into 2 groups, respectively exposed to pneumoperitoneal CO2-insuffiation and normal conditions. To study the possible mechanism, SKOV3 cells were divided into 3 groups, one was exposed to CO2 pneumoperitoneum, one to N2 and the other to normal conditions served as control. The in vitro adhesive and invasive ability of the cells was analyzed through 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyl tetrazolium bromide （MTT） assay and Boyden filters metastasis model; the expressions of vascular endothelial growth factor C （VEGF-C） and matrix metalloproteinase 9 （MMP9） were determined by reverse transcription polymerase chain reaction（RT-PCR）, and Western blot. We found that the adhesive ratio of SKOV3 cells exposed to CO2 was significantly higher than that of the control group; cells exposed to CO2 invaded the matrigel with a greater number （P〈0.01）; the expression of VEGF-C exposed to both CO2 and N2 was significantly increased compared with control group （P〈0.05）; the MMP9 expression level of CO2 group was higher than that of N2 group, P〈0.05. We concluded that carbon dioxide pneumoperitoneum may improve the adhesive and invasive ability of ovarian carcinoma cell line in vitro and CO2 can also be an independent factor to stimulate the expression of MMP9.
文摘[目的]探讨健脾固肾化瘀方联合氯沙坦钾片治疗脾肾两虚夹瘀型糖尿病肾脏病(DKD)的临床疗效以及其对患者血清基质金属蛋白酶-9(MMP-9)、单核细胞趋化因子-1(MCP-1)和血管内皮生长因子(VEGF)水平的影响。[方法]选择沧州中西医结合医院2019年1月—2021年5月纳入80例脾肾两虚夹瘀型DKD患者作为研究对象,采用随机数字表法分成观察组与对照组各40例。观察组给予健脾固肾化瘀方联合氯沙坦钾片治疗,对照组单用氯沙坦钾片治疗,连续治疗12周后观察两组临床疗效。治疗前后检测受试者血糖[空腹血糖(FPG)、餐后2 h血糖(2 h PG)和糖化血红蛋白(HbA1c)]、血脂[总胆固醇(TC)、三酰甘油(TG)和低密度脂蛋白胆固醇(LDL-C)]及肾功能指标[尿微量白蛋白/尿肌酐比值(UACR)、肌酐(SCr)和尿素氮(BUN)]。选用酶联免疫吸附法测定血清MMP-9、MCP-1和VEGF水平。并统计两组不良反应情况。[结果]观察组总有效率为92.50%(37/40),较对照组72.50%(29/40)有所提高(P<0.05)。两组治疗后FPG、2 h PG和HbA1c均较治疗前降低(P<0.05),且均以观察组的改善更显著(P<0.01)。两组治疗后血清TC、TG和LDL-C浓度均较治疗前下降(P<0.05),且均以观察组的改善更显著(P<0.01)。两组治疗后UAER和血清SCr、BUN水平均较治疗前降低(P<0.05),且均以观察组的改善更显著(P<0.01)。两组治疗后血清MMP-9水平均较治疗前升高(P<0.05),血清MCP-1、VEGF浓度均较治疗前下降(P<0.05);且治疗后,观察组对血清MMP-9水平的升高作用及对血清MCP-1、VEGF水平的降低作用较对照组更显著(P<0.01)。所有患者均无明显不良反应发生。[结论]应用健脾固肾化瘀方联合氯沙坦钾片治疗脾肾两虚夹瘀型DKD能安全有效地上调患者MMP-9表达水平,下调MCP-1、VEGF表达水平,改善肾功能,整体疗效确切。
