目的研究VEGF165b和VEGF165在胃癌及癌旁正常组织中的表达及胃癌组织中VEGF165b m RNA/VEGF165 m RNA与预后的关系。方法分别应用实时RT-PCR和免疫组织化学法检测胃癌及癌旁正常组织中VEGF165b和VEGF165的基因及蛋白表达,并对患者进行2...目的研究VEGF165b和VEGF165在胃癌及癌旁正常组织中的表达及胃癌组织中VEGF165b m RNA/VEGF165 m RNA与预后的关系。方法分别应用实时RT-PCR和免疫组织化学法检测胃癌及癌旁正常组织中VEGF165b和VEGF165的基因及蛋白表达,并对患者进行2年的随访,比较VEGF165b m RNA/VEGF165 m RNA比值及这两种蛋白表达水平在胃癌及癌旁组织中的变化;同时分析VEGF165b与VEGF165蛋白表达的相关性以及胃癌组织中VEGF165b m RNA/VEGF165 m RNA与预后的关系。结果在胃癌组织中VEGF165b m RNA/VEGF165 m RNA低于癌旁正常组织中的水平;在癌旁正常组织中VEGF165b基因及蛋白表达强于VEGF165,在胃癌组织中VEGF165b基因及蛋白的表达则低于VEGF165,而且两者表达呈负相关关系;此外,在两年内死亡的患者中VEGF165b m RNA/VEGF165 m RNA明显低于生存患者中的比值水平。结论与正常组织相比,胃癌组织中存在VEGF165b向VEGF165基因及蛋白水平上的优势转换,这种变化有望成为治疗胃癌的新靶点。展开更多
AIM:To elucidate the role of vascular endothelial growth factor-165b(VEGF-165b)in blood-retinal barrier(BRB)injury in the rat acute glaucoma model.METHODS:In this study,the rat acute high intraocular pressure(HIOP)mod...AIM:To elucidate the role of vascular endothelial growth factor-165b(VEGF-165b)in blood-retinal barrier(BRB)injury in the rat acute glaucoma model.METHODS:In this study,the rat acute high intraocular pressure(HIOP)model was established before and after intravitreous injection of anti-VEGF-165b antibody.The expression of VEGF-165b and zonula occludens-1(ZO-1)in rat retina was detected by double immunofluorescence staining and Western blotting,and the breakdown of BRB was detected by Evans blue(EB)dye.RESULTS:The intact retina of rats expressed VEGF-165b and ZO-1 protein,which were mainly located in the retinal ganglion cell layer and the inner nuclear layer and were both co-expressed with vascular endothelial cell markers CD31.After acute HIOP,the expression of VEGF-165b was up-regulated;the expression of ZO-1 was down-regulated at 12h and then recovered at 3d;EB leakage increased,peaking at 12h.After intravitreous injection of anti-VEGF-165b antibody,the expression of VEGF-165b protein was no significantly changed;and the down-regulation of the expression of ZO-1 was more obvious;EB leakage became more serious,peaking at 3d.EB analysis also showed that EB leakage in the peripheral retina was greater than that in the central retina.CONCLUSION:The endogenous VEGF-165b protein may protect the BRB from acute HIOP by regulating the expression of ZO-1.The differential destruction of BRB after acute HIOP may be related to the selective loss of retinal ganglion cells.展开更多
Objective:To investigate the role of vascular endothelial growth factor(VEGF)165a,VEGF165b,and VEGF receptor(VEGFR)in the development of bovine follicles.Methods:We cultured follicular cells that were collected from s...Objective:To investigate the role of vascular endothelial growth factor(VEGF)165a,VEGF165b,and VEGF receptor(VEGFR)in the development of bovine follicles.Methods:We cultured follicular cells that were collected from small,medium,and large sized bovine follicles with estrogen and measured the expression of VEGF,VEGFR2 and VEGF165b by Western blot analysis and immunofluorescence.Results:The expression of VEGF165 increased in all follicle sizes and the expression of VEGF165b was increased in the small and large follicles after culturing in an estrogen containing medium.The expression of VEGFR2 was increased in the medium and large follicles after culturing with estrogen for 96 h.VEGF165 was activated at 100 ng/mL estrogen in the large follicles for 96 h.In addition,VEGFR2 was upregulated in the medium and large follicles after treated with 100 ng/mL estrogen for 96 h.Conclusions:This evidence suggests that the expression of VEGF165 and VEGFR is associated with estrogen stimulation during the development of bovine follicles and in an autocrine or paracrine manner.This reveals an advantage during oocyte maturation in vitro.展开更多
文摘目的研究VEGF165b和VEGF165在胃癌及癌旁正常组织中的表达及胃癌组织中VEGF165b m RNA/VEGF165 m RNA与预后的关系。方法分别应用实时RT-PCR和免疫组织化学法检测胃癌及癌旁正常组织中VEGF165b和VEGF165的基因及蛋白表达,并对患者进行2年的随访,比较VEGF165b m RNA/VEGF165 m RNA比值及这两种蛋白表达水平在胃癌及癌旁组织中的变化;同时分析VEGF165b与VEGF165蛋白表达的相关性以及胃癌组织中VEGF165b m RNA/VEGF165 m RNA与预后的关系。结果在胃癌组织中VEGF165b m RNA/VEGF165 m RNA低于癌旁正常组织中的水平;在癌旁正常组织中VEGF165b基因及蛋白表达强于VEGF165,在胃癌组织中VEGF165b基因及蛋白的表达则低于VEGF165,而且两者表达呈负相关关系;此外,在两年内死亡的患者中VEGF165b m RNA/VEGF165 m RNA明显低于生存患者中的比值水平。结论与正常组织相比,胃癌组织中存在VEGF165b向VEGF165基因及蛋白水平上的优势转换,这种变化有望成为治疗胃癌的新靶点。
基金Supported by the National Natural Science Foundation of China(No.81660217)Youth Foundation of the First Affiliated Hospital of Hainan Medical University(No.HYYFYPY201922)。
文摘AIM:To elucidate the role of vascular endothelial growth factor-165b(VEGF-165b)in blood-retinal barrier(BRB)injury in the rat acute glaucoma model.METHODS:In this study,the rat acute high intraocular pressure(HIOP)model was established before and after intravitreous injection of anti-VEGF-165b antibody.The expression of VEGF-165b and zonula occludens-1(ZO-1)in rat retina was detected by double immunofluorescence staining and Western blotting,and the breakdown of BRB was detected by Evans blue(EB)dye.RESULTS:The intact retina of rats expressed VEGF-165b and ZO-1 protein,which were mainly located in the retinal ganglion cell layer and the inner nuclear layer and were both co-expressed with vascular endothelial cell markers CD31.After acute HIOP,the expression of VEGF-165b was up-regulated;the expression of ZO-1 was down-regulated at 12h and then recovered at 3d;EB leakage increased,peaking at 12h.After intravitreous injection of anti-VEGF-165b antibody,the expression of VEGF-165b protein was no significantly changed;and the down-regulation of the expression of ZO-1 was more obvious;EB leakage became more serious,peaking at 3d.EB analysis also showed that EB leakage in the peripheral retina was greater than that in the central retina.CONCLUSION:The endogenous VEGF-165b protein may protect the BRB from acute HIOP by regulating the expression of ZO-1.The differential destruction of BRB after acute HIOP may be related to the selective loss of retinal ganglion cells.
文摘Objective:To investigate the role of vascular endothelial growth factor(VEGF)165a,VEGF165b,and VEGF receptor(VEGFR)in the development of bovine follicles.Methods:We cultured follicular cells that were collected from small,medium,and large sized bovine follicles with estrogen and measured the expression of VEGF,VEGFR2 and VEGF165b by Western blot analysis and immunofluorescence.Results:The expression of VEGF165 increased in all follicle sizes and the expression of VEGF165b was increased in the small and large follicles after culturing in an estrogen containing medium.The expression of VEGFR2 was increased in the medium and large follicles after culturing with estrogen for 96 h.VEGF165 was activated at 100 ng/mL estrogen in the large follicles for 96 h.In addition,VEGFR2 was upregulated in the medium and large follicles after treated with 100 ng/mL estrogen for 96 h.Conclusions:This evidence suggests that the expression of VEGF165 and VEGFR is associated with estrogen stimulation during the development of bovine follicles and in an autocrine or paracrine manner.This reveals an advantage during oocyte maturation in vitro.
