Objective： Vascular-targeted therapy is gradually becoming more appealing for patients with lung cancer. It is unclear whether vascular endothelial growth factor receptor 2（VEGFR2） and neuropilin-1（NRP-1） can be ...Objective： Vascular-targeted therapy is gradually becoming more appealing for patients with lung cancer. It is unclear whether vascular endothelial growth factor receptor 2（VEGFR2） and neuropilin-1（NRP-1） can be biomarkers for clinical treatment. We aimed to investigate the expression levels of VEGFR2 and NRP-1 in human non-small cell lung cancer（NSCLC） and their clinical significance by observing patient prognosis. Methods： VEGFR2 and NRP-1 were assessed by immunohistochemistry（IHC） in 40 patients with NSCLC and in 10 patients with benign lesions of lung; kinase insert domain receptor（KDR） and NRP-1 copy number gain（CNG） was assessed by fluorescence in situ hybridization（FISH）. The distributions of overall survival（OS） and progression-free survival（PFS） were estimated using the Kaplan-Meier method and compared between groups by log-rank test.Results： Rates of positive immunostaining for VEGFR2 and NRP-1 were 58% and 55%, respectively. KDR and NRP-1 CNG（＋） were detected in 32.5% and 30% of tumors, respectively. Levels of both VEGFR2 and NRP-1 in lung tumors were significantly different than in the control tissue（χ2=11.22, P=0.001; χ2=9.82, P=0.001, respectively）; similar results were obtained using CNGs（χ2=4.39, P=0.036; χ2=3.95, P=0.046, respectively）. Statistically significant correlations were observed with histological grade, clinical TNM stage and the lymph node status（P〈0.05）, but not age, gender or pathology type（P〉0.05）. VEGFR2 showed a strong correlation with NRP-1（Rs=0.68, P=0.00）; similar results were observed with KDR and NRP-1 CNG（Rs=0.32, P=0.04）. Significant differences in OS and PFS were observed between the groups with higher VEGFR2 and NRP-1 and those with lower expression（P〈0.05）. Conclusions： According to these data, VEGFR2 and NRP-1 are highly expressed in NSCLC. We can conclude that they play a key role in NSCLC occurrence, development and metastasis and are associated with patient prognosis（P〈0.05 for OS and PFS）. This information will be beneficial for clinical antiangiogenic treatment in NSCLC.展开更多
目的:研究有氧运动对2型糖尿病大鼠肾脏VEGF-A、VEGFR2蛋白表达的影响,并对其可能机制进行探讨。方法:通过高糖高脂饲喂5周加低剂量腹腔注射STZ复制2型糖尿病大鼠模型,7周后成模SD大鼠被随机分为糖尿病安静组和糖尿病运动组,另设正常对...目的:研究有氧运动对2型糖尿病大鼠肾脏VEGF-A、VEGFR2蛋白表达的影响,并对其可能机制进行探讨。方法:通过高糖高脂饲喂5周加低剂量腹腔注射STZ复制2型糖尿病大鼠模型,7周后成模SD大鼠被随机分为糖尿病安静组和糖尿病运动组,另设正常对照组。采用7周有氧游泳运动只对糖尿病运动组进行干预,实验末测定血糖、24 h UA、肾皮质VEGF-A及VEGFR2和p-VEGFR2蛋白的表达及光镜、电镜观察肾小球形态结构的变化。结果:光镜下糖尿病运动组大鼠肾小球增大不明显,毛细血管袢大多数开放,球囊壁渗出、粘连等现象较糖尿病安静组明显改善;基底膜无明显增厚,足突融合等现象较糖尿病安静组均有所减轻;血糖浓度和24 h UA排泄量降低显著(P<0.05或P<0.01);肾皮质VEGF-A、VEGFR2和p-VEGFR2蛋白的表达均较糖尿病安静组显著降低(P<0.05或P<0.01)。结论:运动对2型糖尿病大鼠肾脏有保护作用,其作用机制可能是通过其降低血糖及下调2型糖尿病状态下表达增加的VEGF-A和VEGFR2蛋白水平,而减轻大鼠肾脏损伤。展开更多
文摘目的:探讨血管内皮生长因子受体2(VEGFR2)基因V297I位点对贝伐珠单抗联合化疗治疗晚期非小细胞肺癌(nonsmall cell lung cancer,NSCLC)患者疗效的影响。方法:收集2010年1月到2017年1月在河南中医药大学第三附属医院肿瘤科135例一线接受贝伐珠单抗联合含铂双药化疗的晚期NSCLC患者的临床资料,用PCR-RFLP法检测患者外周血VEGFR2基因型,q PCR法检测患者癌组织中VEGFR2 m RNA的表达。通过Logistic回归模型分析多态性位点的基因型和其他变量的相关性,用Kaplan-Meier法分析基因型和预后的相关性,以Cox风险模型分析患者PFS的危险因素。结果:在VEGFR2的多态性位点中,只发现了V297I位点其有临床意义。V297I位点位于该基因的编码区,在研究人群的基因分布频率为CC型99例(73.33%)、CT型33例(24.44%)、TT型3例(2.23%),最小等位基因频率为0.14,3种基因型分布频率符合哈迪温-伯格平衡(P>0.05)。135例NSCLC患者的ORR为45.93%,中位PFS为8.2个月,中位OS为20.8个月。CT/TT型和CC型患者的ORR分别为41.67%和47.47%(P>0.05),中位PFS分别为6.2和8.6个月(P<0.01),中位OS分别为18.9和21.5个月(P<0.05)。CT/TT基因型患者癌组织中VEGFR2 m RNA水平明显高于CC型患者(P<0.01)。影响NSCLC患者PFS的危险因素有:V297I位点和性别、ECOG评分。结论:在接受贝伐珠单抗联合化疗治疗的晚期NSCLC患者中,VEGFR2基因V297I位点可能通过VEGFR2基因的表达影响贝伐珠单抗一线治疗NSCLC患者的疗效和预后。
基金supported by National Natural Science Foundation of China [81472792]Ministry of Health of China (W201210)Jiangsu Natural Science Foundation of China (BK2012661)
文摘Objective： Vascular-targeted therapy is gradually becoming more appealing for patients with lung cancer. It is unclear whether vascular endothelial growth factor receptor 2（VEGFR2） and neuropilin-1（NRP-1） can be biomarkers for clinical treatment. We aimed to investigate the expression levels of VEGFR2 and NRP-1 in human non-small cell lung cancer（NSCLC） and their clinical significance by observing patient prognosis. Methods： VEGFR2 and NRP-1 were assessed by immunohistochemistry（IHC） in 40 patients with NSCLC and in 10 patients with benign lesions of lung; kinase insert domain receptor（KDR） and NRP-1 copy number gain（CNG） was assessed by fluorescence in situ hybridization（FISH）. The distributions of overall survival（OS） and progression-free survival（PFS） were estimated using the Kaplan-Meier method and compared between groups by log-rank test.Results： Rates of positive immunostaining for VEGFR2 and NRP-1 were 58% and 55%, respectively. KDR and NRP-1 CNG（＋） were detected in 32.5% and 30% of tumors, respectively. Levels of both VEGFR2 and NRP-1 in lung tumors were significantly different than in the control tissue（χ2=11.22, P=0.001; χ2=9.82, P=0.001, respectively）; similar results were obtained using CNGs（χ2=4.39, P=0.036; χ2=3.95, P=0.046, respectively）. Statistically significant correlations were observed with histological grade, clinical TNM stage and the lymph node status（P〈0.05）, but not age, gender or pathology type（P〉0.05）. VEGFR2 showed a strong correlation with NRP-1（Rs=0.68, P=0.00）; similar results were observed with KDR and NRP-1 CNG（Rs=0.32, P=0.04）. Significant differences in OS and PFS were observed between the groups with higher VEGFR2 and NRP-1 and those with lower expression（P〈0.05）. Conclusions： According to these data, VEGFR2 and NRP-1 are highly expressed in NSCLC. We can conclude that they play a key role in NSCLC occurrence, development and metastasis and are associated with patient prognosis（P〈0.05 for OS and PFS）. This information will be beneficial for clinical antiangiogenic treatment in NSCLC.
文摘目的:研究有氧运动对2型糖尿病大鼠肾脏VEGF-A、VEGFR2蛋白表达的影响,并对其可能机制进行探讨。方法:通过高糖高脂饲喂5周加低剂量腹腔注射STZ复制2型糖尿病大鼠模型,7周后成模SD大鼠被随机分为糖尿病安静组和糖尿病运动组,另设正常对照组。采用7周有氧游泳运动只对糖尿病运动组进行干预,实验末测定血糖、24 h UA、肾皮质VEGF-A及VEGFR2和p-VEGFR2蛋白的表达及光镜、电镜观察肾小球形态结构的变化。结果:光镜下糖尿病运动组大鼠肾小球增大不明显,毛细血管袢大多数开放,球囊壁渗出、粘连等现象较糖尿病安静组明显改善;基底膜无明显增厚,足突融合等现象较糖尿病安静组均有所减轻;血糖浓度和24 h UA排泄量降低显著(P<0.05或P<0.01);肾皮质VEGF-A、VEGFR2和p-VEGFR2蛋白的表达均较糖尿病安静组显著降低(P<0.05或P<0.01)。结论:运动对2型糖尿病大鼠肾脏有保护作用,其作用机制可能是通过其降低血糖及下调2型糖尿病状态下表达增加的VEGF-A和VEGFR2蛋白水平,而减轻大鼠肾脏损伤。
