Objective: To investigate the expression of beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGF receptor-2 (VEGFR-2) protein in medulloblastoma. Methods: Immunohistochemical staining with SP method was conducted to...Objective: To investigate the expression of beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGF receptor-2 (VEGFR-2) protein in medulloblastoma. Methods: Immunohistochemical staining with SP method was conducted to determine the expression of beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGFR-2 in 33 cases of medulloblastoma and 10 normal cerebellar tissues. Results: The expression rate of beta-catenin, and VEGFs (VEGF-A, VEGF-C) and VEGFR-2 in medulloblastoma were significantly higher than that in normal tissue. A significant positive correlation was found between beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGFR-2 protein in medulloblastoma. Conclusion: There was a correlation between beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGFR-2 in medulloblastoma, which may play a role in the pathogenesis and development of medulloblastoma.展开更多
目的:研究VEGF/VEGFR在脑缺血再灌注损伤中的神经保护作用。方法:SD大鼠108只,随机分为假手术组、对照组与VEGFR抗体组,每组36只,制备大脑中动脉缺血再灌注损伤(MCAO)模型,假手术组不造成缺血。VEGFR抗体组在造模前20 min侧脑室注射VEG...目的:研究VEGF/VEGFR在脑缺血再灌注损伤中的神经保护作用。方法:SD大鼠108只,随机分为假手术组、对照组与VEGFR抗体组,每组36只,制备大脑中动脉缺血再灌注损伤(MCAO)模型,假手术组不造成缺血。VEGFR抗体组在造模前20 min侧脑室注射VEGF抗体,假手术组、对照组侧脑室注射等量生理盐水。比较3组在造模后1、3、7 d Bederson评分、VEGFR及缺血半暗带VEGFR2的变化。结果:VEGFR抗体组的Bederson评分在第1、3天高于对照组(P<0.05),VEGFR的表达在第1、3天低于对照组(P<0.01),但较假手术组高;VEGFR抗体组VEGFR2表达在第1、3天低于对照组(P<0.01)。结论:脑缺血再灌注损伤时,VEGF活化刺激VEGFR表达上调,促进血管内皮细胞增殖,加速新生血管形成。展开更多
文摘Objective: To investigate the expression of beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGF receptor-2 (VEGFR-2) protein in medulloblastoma. Methods: Immunohistochemical staining with SP method was conducted to determine the expression of beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGFR-2 in 33 cases of medulloblastoma and 10 normal cerebellar tissues. Results: The expression rate of beta-catenin, and VEGFs (VEGF-A, VEGF-C) and VEGFR-2 in medulloblastoma were significantly higher than that in normal tissue. A significant positive correlation was found between beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGFR-2 protein in medulloblastoma. Conclusion: There was a correlation between beta-catenin and VEGFs (VEGF-A, VEGF-C) and VEGFR-2 in medulloblastoma, which may play a role in the pathogenesis and development of medulloblastoma.
文摘目的:研究VEGF/VEGFR在脑缺血再灌注损伤中的神经保护作用。方法:SD大鼠108只,随机分为假手术组、对照组与VEGFR抗体组,每组36只,制备大脑中动脉缺血再灌注损伤(MCAO)模型,假手术组不造成缺血。VEGFR抗体组在造模前20 min侧脑室注射VEGF抗体,假手术组、对照组侧脑室注射等量生理盐水。比较3组在造模后1、3、7 d Bederson评分、VEGFR及缺血半暗带VEGFR2的变化。结果:VEGFR抗体组的Bederson评分在第1、3天高于对照组(P<0.05),VEGFR的表达在第1、3天低于对照组(P<0.01),但较假手术组高;VEGFR抗体组VEGFR2表达在第1、3天低于对照组(P<0.01)。结论:脑缺血再灌注损伤时,VEGF活化刺激VEGFR表达上调,促进血管内皮细胞增殖,加速新生血管形成。