Objective The aim of this study was to determine Neuropilin 1(NRP1)contribution to transforming growth factorβ1(TGF-β1)-induced epithelial mesenchymal transition(EMT)of HGC-27 gastric cancer cells and study its mech...Objective The aim of this study was to determine Neuropilin 1(NRP1)contribution to transforming growth factorβ1(TGF-β1)-induced epithelial mesenchymal transition(EMT)of HGC-27 gastric cancer cells and study its mechanism.Methods In this study,TGF-β1 was used to induce EMT in HGC-27 cells.Further,these cells were stably transfected with siRNA targeting NRP1.Wound healing and transwell assays were used to measure cell migration and invasion,respectively.NRP1 and EMT markers were measured using quantitative real time reverse transcription polymerase chain reaction and western blotting.Results Exposure of TGF-β1 conferred a fibroblastic-like shape to cancer cells and significantly increased the expression of NRP1 in HGC-27 cells.TGF-β1 subsequently promoted migration and invasion of HGC-27 cells.Furthermore,silencing NRP1 inhibited the invasion and migration of TGF-β1-induced cells undergoing EMT.Conclusion Silencing NRP1 can inhibit cell migration,invasion,and metastasis and reverse the TGF-β1-induced EMT process of gastric cancer.展开更多
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 fo展开更多
The dense extracellular matrix and high interstitial fluid pressure of tumor tissues prevent the ability of anti-tumor agents to penetrate deep into the tumor parenchyma for treatment effects. C-end rule(CendR) peptid...The dense extracellular matrix and high interstitial fluid pressure of tumor tissues prevent the ability of anti-tumor agents to penetrate deep into the tumor parenchyma for treatment effects. C-end rule(CendR) peptides can enhance the permeability of tumor blood vessels and tumor tissues via binding to neuropilin-1(NRP-1), thus aiding in drug delivery. In this study, we selected one of the CendR peptides(sequence RGERPPR) as the parent L-peptide and substituted D-amino acids for the L-amino acids to synthesize its inverso peptide D(RGERPPR). We investigated the NRP-1 binding activity and tumorpenetrating ability of D(RGERPPR). We found that the binding affinity of D(RGERPPR) with NRP-1 and the cellular uptake was significantly higher than that of RGERPPR. Evans Blue tests revealed that D(RGERPPR) exhibited improved tumor-penetrating ability in C6, U87 and A549 tumor-bearing nude mice. Using nude mice bearing A549 xenograft tumors as a model, we found that the rate of tumor growth in the group co-administered with D(RGERPPR) and gemcitabine(Gem) was significantly lower than the gemcitabine-treated group with a tumor suppression rate(TSR%) of 55.4%. Together, our results demonstrate that D(RGERPPR) is a potential tumor-penetrating peptide.展开更多
基金Supported by grants from Returning Overseas Students(No.CY201721).
文摘Objective The aim of this study was to determine Neuropilin 1(NRP1)contribution to transforming growth factorβ1(TGF-β1)-induced epithelial mesenchymal transition(EMT)of HGC-27 gastric cancer cells and study its mechanism.Methods In this study,TGF-β1 was used to induce EMT in HGC-27 cells.Further,these cells were stably transfected with siRNA targeting NRP1.Wound healing and transwell assays were used to measure cell migration and invasion,respectively.NRP1 and EMT markers were measured using quantitative real time reverse transcription polymerase chain reaction and western blotting.Results Exposure of TGF-β1 conferred a fibroblastic-like shape to cancer cells and significantly increased the expression of NRP1 in HGC-27 cells.TGF-β1 subsequently promoted migration and invasion of HGC-27 cells.Furthermore,silencing NRP1 inhibited the invasion and migration of TGF-β1-induced cells undergoing EMT.Conclusion Silencing NRP1 can inhibit cell migration,invasion,and metastasis and reverse the TGF-β1-induced EMT process of gastric cancer.
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 fo
基金supported by the National Science Foundation of China (Grant Nos.81473148 and 81690263)the Foundation Program of Key Laboratory of Smart Drug Delivery of the Ministry of Education
文摘The dense extracellular matrix and high interstitial fluid pressure of tumor tissues prevent the ability of anti-tumor agents to penetrate deep into the tumor parenchyma for treatment effects. C-end rule(CendR) peptides can enhance the permeability of tumor blood vessels and tumor tissues via binding to neuropilin-1(NRP-1), thus aiding in drug delivery. In this study, we selected one of the CendR peptides(sequence RGERPPR) as the parent L-peptide and substituted D-amino acids for the L-amino acids to synthesize its inverso peptide D(RGERPPR). We investigated the NRP-1 binding activity and tumorpenetrating ability of D(RGERPPR). We found that the binding affinity of D(RGERPPR) with NRP-1 and the cellular uptake was significantly higher than that of RGERPPR. Evans Blue tests revealed that D(RGERPPR) exhibited improved tumor-penetrating ability in C6, U87 and A549 tumor-bearing nude mice. Using nude mice bearing A549 xenograft tumors as a model, we found that the rate of tumor growth in the group co-administered with D(RGERPPR) and gemcitabine(Gem) was significantly lower than the gemcitabine-treated group with a tumor suppression rate(TSR%) of 55.4%. Together, our results demonstrate that D(RGERPPR) is a potential tumor-penetrating peptide.
