RNA interference inhibits expression of vascular endothelial growth factor (VEGF) in human retinal pigment epithelial cells

Choroidal neovascularization (CNV), a major causeof vision loss, is the result of the increased vascularendothelial growth factor (VEGF) expression in humanretinal pigment epithelial (RPE) cells·It is important toinhibit the expression of VEGF protein in RPE cells·RNA interference ( RNAi) can result in sequence-specific gene silencing·1This phenomenon is nowbeingexploited as a powerful tool for reverse genetics, andshows great promise for therapeutic applications·Recently, numerou…     

Suppression of intracranial glioma tumorigenesis with vascular endothelial growth factor antisense oligonucleotide in rats

Objective: To observe the inhibition of intracranial glioma tumorigenesis by vascular endothelial growth factor (VEGF) antisense oligodeoxynucleotide (ODN) in rats. Methods: Totally 20 μ1 Hank's liquid containing 1×106 C6 glioma cells was seeded into rat right caudate putaraen in high-flow microinfusion with stereotactic technique. VEGF antisense ODN was simultaneously used with glioma cell. Each rat of the treated group Ⅰ and the treated group Ⅱ was treated with 1 000 μmol/L VEGF antisense ODN. Each rat of the treated group Ⅲ and the treated group Ⅳ was treated with 2 000 μmol/L VEGF antisense ODN. The experimental periods of the treated group Ⅰ , the treated group Ⅲ and the control group Ⅰ were 2 weeks, those of the treated group Ⅱ , the treated group Ⅳ and the control group Ⅱ were 3 weeks. Before sacrifice, MRI was performed on each rat. Tumor magnitude and pathologic examination were detected after samples were dissected. Results: The survival state of all treated rats was better, and     

Vascular endothelial growth factor promotes angiogenesis in gastric carcinoma

Objective: To explore the role of vascular endothelial growth factor (VEGF) in the angiogenesis and development of human gastric carcinoma. Methods: The expressions of VEGF and its receptor KDR (ki-nase-domain insert containing receptor) in human gastric cancer tissue and SGC-7901 cells were detected with immunohistochemical staining. Microvessel density (MVD) was obtained after immunostaining for Factor-VIII. VEGF in SGC-7901 cell line was detected with Western blot. VEGF levels were manipulated in human gastric cancer cell by using eukaryotic expression vector containing the complete VEGF165 complimentary DNA in either the sense or antisense orientation. Finally the biological characteristics of the transfectants were identified. Results: VEGF-positive rate in TNM grade I and IV gastric carcinomas (19. 0%) were significantly higher than that in grade I and I (72. 4%) (P<0. 05). Increased MVD was found in VEGF-positive tumors (16. 4±6. 7). which is significantly larger than in VEGF-negative tumors (6.     

Expression of nerve growth factor and hypoxia inducible factor-1α and its correlation with angiogenesis in non-small cell lung cancer

Summary： In order to investigate the expression of nerve growth factor （NGF） and hypoxia inducible factor-1α （HIF-1α） and its correlation with angiogenesis in non-small cell lung cancer （NSCLC）, paraffin-embedded tissue blocks from 20 patients with NSCLC were examined. Twenty corresponding para-cancerous lung tissue specimens were obtained to serve as a control. The expression of NGF, HIF-1α, and vascular endothelial growth factor （VEGF） in the NSCLC tissues was detected by using immunohistochemistry. The microvascular density （MVD） was determined by CD31 staining. The resuits showed that the expression levels ofNGF, HIF-1α and VEGF in the NSCLC tissues were remarkably higher than those in the para-cancerous lung tissues （P〈0.05）. There was significant difference in the MVD between the NSCLC tissues （9.19±1.43） and para-cancerous lung tissues （2.23±1.19） （P〈0.05）. There were positive correlations between NGF and VEGF, between HIF-1α and VEGF, and between NGF and HIF-1α in NSCLC tissues, with the spearman correlation coefficient being 0.588, 0.519 and 0.588, respectively. In NSCLC tissues, the MVD had a positive correlation with the three factors （P〈0.05）. Theses results suggest that NGF and HIF-1α are synergically involved in the angiogenesis of NSCLC.     

Hyperbaric oxygen intervention on expression of hypoxia-inducible factor-1α and vascular endothelial growth factor in spinal cord injury models in rats

Background Hyperbaric oxygen （HBO） intervention is a main therapeutic method and the curative effect has been certified for spinal cord injury （SCI）, but the mechanisms of the neuroprotective effect of HBO on SCI remain elusive. This study aimed to observe the change in expression of hypoxia-inducible factor-1α （HIF-1α） and vascular endothelial growth factor （VEGF） after SCI at different time points and to investigate the neuroprotective mechanism of HBO on SCI in rats.     

Inhibitory effect of 2′-o-methoxyethyl-modified antisense oligonucleotides targeting vascular endothelial growth factor A on SKOV3 human ovarian cancer cells

Background  Ovarian cancers are often at an advanced stage at diagnosis because early detection is difficult. The poor prognosis of ovarian cancers highlights the crucial need to develop better therapeutic agents and strategies. The objective of this study was to investigate the inhibitory effects of a new modified antisense oligonucleotides targeting vascular endothelial growth factor A (VEGF-A) in SKOV3 ovarian cancer cells.

Methods  Antisense oligonucleotides targeting VEGF-A was designed, synthesized and transfected into SKOV3 ovarian cancer cells. Western blotting and real-time RT-PCR were used to analyze the inhibitory effects of antisense oligonucleotides on VEGF-A protein and mRNA expression. Transwell matrix assay was used to detect cell migration inhibition.

Results  The antisense oligonucleotides targeting VEGF-A significantly decreased VEGF-A protein and mRNA expression and inhibited cell migration in SKOV3 ovarian cancer cells.

Conclusions  This new modified antisense oligonucleotides targeting VEGF-A can decrease VEGF-A expression and inhibit cell migration in SKOV3 ovarian cancer cells. This new oligonucleotides may be a promising therapeutic agent for ovarian cancers.

     

非小细胞肺癌组织中表皮生长因子受体和血管内皮生长因子的表达及临床意义

目的:观察非小细胞肺癌(NSCLC)组织中表皮生长因子受体(EGFR)和血管内皮生长因子(VEGF)的表达,并探讨二者可能的临床意义.方法:免疫组织化学染色比较82例NSCLC和20例非恶性肺组织中EGFR和VEGF的表达;观察NSCLC患者不同临床病理特征下EGFR和VEGF蛋白的表达情况,并分析二者表达的相关性.结果:NSCLC组织中EGFR、VEGF阳性表达率明显高于非恶性肺组织(53.66% vs 0,62.20% vs 25%,P＜0.05).EGFR表达在不同性别、不同病理类型(鳞癌vs腺癌)、有无淋巴结转移及不同TNM分期的NSCLC患者之间有统计学差异(P＜0.05);VEGF表达在有无淋巴结转移及不同TNM分期的NSCLC患者之间有统计学差异(P=0.000 1).EGFR、VEGF高表达患者生存期短于各自的低表达患者(P＜0.05).NSCLC组织中EGFR和VEGF的表达具有相关性(rs=0.314,P＜0.05).结论:NSCLC组织中EGFR和VEGF存在过度表达,二者表达具有相关性,可作为判断NSCLC患者病情及预后的参考指标和靶向治疗靶点.     

大肠癌患者血清血管内皮生长因子的检测及临床意义

目的 探讨血管内皮生长因子(VEGF)在大肠癌患者血清中的水平及其临床意义。方法采用ELISA法检测82例大肠癌患者和30例正常对照者血清中VEGF的含量。结果大肠癌患者血清VEGF水平明显高于正常对照组，大肠癌有远处转移患者血清VBGF水平明显高于无转移患者。结论血清VBGF水平的检测对大肠癌的诊断具有一定的临床意义，可反映疾病的进展情况，血清VBGF水平与大肠癌的浸润和转移密切相关，术前检测血清VEGF水平，对预测大肠癌的侵袭和转移具有一定的临床意义。     

Human vascular endothelial growth factor cDNA cloning and expression in osteoblasts

Vascularendothelialgrowth factor(VEGF) ,al-so known as vascular permeability factor,is one ofthe mostimportant angiogenic factor in vivo.Recentresearch have indicated that gene transfer of nakedDNA encoding for VEGF in vivo was a potentialtreatment for myocardial and hindlimb ischemia[1,2 ] .Formation of new capillaries,a critical component oftissue growth and repair,is a recognized process inthe development,formation and remodeling of bone.To make use of VEGF gene therapy on bone diseas…     

血管内皮生长因子在乳腺癌中的表达及其临床意义

目的 研究血管内皮生长因子（ＶＥＧＦ）在乳腺癌的发生及判断预后方面的意义。方法 应用Ｓ－Ｐ免疫组化染色法检测ＶＥＧＦ在乳腺良恶性病变中的表达。结果 乳腺癌ＶＥＧＦ表达阳性率（７２．５％）高于乳腺良性病变（２／８）,二者间差异具有显著性（Ｐ〈０．０５）。４０例乳腺癌中,淋巴结转移组ＶＥＧＦ阳性表达（１９／２１）高于淋巴结转移组（１２／１９）,二者差异具有显著性（Ｐ〈０．０５）。结论 ＶＥＧＦ在乳腺癌     

Expression of Vascular Endothelial Growth Factor （VEGF） in Human Osteosarcoma Cells Transfected with Adeno-associated Virus-antisense VEGF

Ithasbecomeacommonmethodforcancertreatmentthroughantivascularizationinthepresent.Somestudieshaverevealedthatlivercancer ,lungcancerandcervicalcancercanbetreatedsuccessfullythroughholdingbackvascularendothelialgrowthfac tor (VEGF) proteinbecauseofitsimport…     

肺癌患者血清VEGF-C的临床意义

目的 探讨肺癌患者血清中血管内皮细胞生长因子C(VEGF-C)水平与肺癌转移之间的关系及意义,为临床推测肺癌的生长状态和判断预后提供参考.方法 应用酶联免疫吸附试验(ELISA)测定50例肺癌患者血清中VEGF-C的含量,另以20例健康人作对照.结果 肺癌患者血清VEGF-C水平显著高于健康人(P＜0.01);不同组织学类型、性别、年龄、有无吸烟史的患者血清VEGF-C水平无显著差异(P＞0.05);而有淋巴结转移组的血清VEGF-C水平明显高于无淋巴结转移组(P＜0.01);有远处器官转移的与无远处器官转移的血清VEGF-C水平也有显著性差异(P＜0.01).结论 血清VEGF-C对于临床推测肺癌的生长状态具有重要的指导意义,可作为判断肺癌侵袭转移状态的生物学指标.     

血管内皮生长因子反义寡核苷酸抑制Lewis肺癌的血管形成

目的 探讨反义寡核苷酸(ASODN)抑制Lewis肺癌细胞血管内皮生长因子(vascular endothelial growth factor,VEGF)基因表达的效应.方法 将人工合成的VEGF反义寡核苷酸(ASODN)、正义寡核苷酸(SODN)加入培养的Lewis肺癌细胞中,检测Lewis肺癌细胞中VEGF蛋白的表达,同时测定各上清液刺激血管内皮细胞生长的受抑情况.结果 VEGF-ASODN能明显抑制Lewis肺癌细胞VEGF蛋白的表达,而且可以通过抑制VEGF的表达抑制内皮细胞的生长.结论 VEGF反义寡核苷酸抑制肺癌细胞表达VEGF,有望成为肺癌基因治疗的一种新的治疗手段.     

非小细胞肺癌中血管内皮生长因子表达及与预后的关系

目的　探讨非小细胞肺癌 (NSCLC)中血管内皮生长因子 (VEGF)的表达和微血管密度 (MVD)的关系及与预后的相关性。方法　采用免疫组化方法 ,检测 6 0例NSCLC中VEGF的表达及MVD ,并以Log rank曲线检测其生存率。结果　 6 0例NSCLC中 ,VEGF表达的阳性率为 78.33% ,明显高于正常的肺组织 (4 0 % )。VEGF的表达与性别、年龄、肿物大小、病理类型等无关 (P >0 .0 5 ) ,而与MVD、淋巴结转移有关 (P <0 .0 5 )。在NSCLC中 ,VEGF阳性组的MVD〔(4 9.77± 11.9)条〕明显高于阴性组〔(31.6 7± 8.88)条〕。有淋巴结转移组的VEGF阳性率 (90 % )明显高于无淋巴结转移组 (6 6 .6 7% )。经生存曲线Log rank检测分析表明 ,VEGF表达与NSCLC的预后呈负相关。结论　VEGF的表达对肿瘤血管生成、转移起重要作用 ,与NSCLC预后密切相关 ,可以作为估计生存率的参考指标。     

肺癌VEGF-C表达的器官差异性与淋巴结转移度及肿瘤细胞凋亡的关系

目的 探讨血管内皮生长因子C(VEGF-C)在肺癌原发灶和转移淋巴结中表达的差异,以及与淋巴结转移度(LNR)和肺癌细胞凋亡的关系.方法 采用免疫组织化学和TUNEL法染色,检测并分析肺癌原发灶和转移淋巴结中肿瘤细胞VEGF-C的表达,及其与LNK及肿瘤细胞凋亡的关系.结果 原发灶和LNM灶肿瘤细胞中,LNM灶VEGF-C表达水平明显高于原发灶(P＜0.05);两者的VEGF-C表达均与LNR显著相关(P＜0.05,P＜0.01),LNM灶的表达水平与LNR的相关系数明显高于原发灶(P＜0.05);原发灶VEGF-C的表达与肿瘤细胞凋亡率无显著相关(P＞0.05),而LNM灶VEGF-C的表达与凋亡率呈显著负相关(P＜0.01).结论 肺癌VEGF-C在原发灶和LNM灶中的表达差异具有统计学意义,而LNM灶表达水平与LNK的关系更为密切,且与LNM灶中肺癌细胞的凋亡相关.     

VEGF在乳腺癌中的表达及临床意义

目的：探讨VEGF在乳腺癌中的表达以及对预后的判断意义。方法：对43例乳腺癌患者手术切除的标本采用免疫组化方法（S-P法）进行VEGF检测。结果：VEGF阳性表达38例，表达率为88％，其中，13例有腋窝淋巴结转移患者表现为（＋＋＋）；28例肿瘤长径〉3cm，占阳性表达38例患者中74％~2例复发病例均为有腋窝淋巴结转移的患者。结论：VEGF不但可作为判断乳腺癌转移的一个肿瘤标记物，还可以作为判断乳腺癌的预后指标。