Objective:We aimed to develop a novel anti-HIF-1αintrabody to decrease gemcitabine resistance in pancreatic cancer patients.Methods:Surface plasmon resonance and glutathione S-transferase pull-down assays were conduc...Objective:We aimed to develop a novel anti-HIF-1αintrabody to decrease gemcitabine resistance in pancreatic cancer patients.Methods:Surface plasmon resonance and glutathione S-transferase pull-down assays were conducted to identify the binding affinity and specificity of anti-HIF-1αVHH212[a single-domain antibody(nanobody)].Molecular dynamics simulation was used to determine the protein-protein interactions between hypoxia-inducible factor-1α(HIF-1α)and VHH212.The real-time polymerase chain reaction(PCR)and Western blot analyses were performed to identify the expressions of HIF-1αand VEGF-A in pancreatic ductal adenocarcinoma cell lines.The efficiency of the VHH212 nanobody in inhibiting the HIF-1 signaling pathway was measured using a dual-luciferase reporter assay.Finally,a PANC-1 xenograft model was developed to evaluate the anti-tumor efficiency of combined treatment.Immunohistochemistry analysis was conducted to detect the expressions of HIF-1αand VEGF-A in tumor tissues.Results:VHH212 was stably expressed in tumor cells with low cytotoxicity,high affinity,specific subcellular localization,and neutralization of HIF-1αin the cytoplasm or nucleus.The binding affinity between VHH212 and the HIF-1αPAS-B domain was 42.7 n M.Intrabody competitive inhibition of the HIF-1αheterodimer with an aryl hydrocarbon receptor nuclear translocator was used to inhibit the HIF-1/VEGF pathway in vitro.Compared with single agent gemcitabine,co-treatment with gemcitabine and a VHH212-encoding adenovirus significantly suppressed tumor growth in the xenograft model with 80.44%tumor inhibition.Conclusions:We developed an anti-HIF-1αnanobody and showed the function of VHH212 in a preclinical murine model of PANC-1 pancreatic cancer.The combination of VHH212 and gemcitabine significantly inhibited tumor development.These results suggested that combined use of anti-HIF-1αnanobodies with first-line treatment may in the future be an effective treatment for pancreatic cancer.展开更多
AIM: To evaluate the significance of BNIP3 in the pathogenesis of pancreatic cancer, we analyzed the relationship between the expression of BNIP3 and survival rate of the patients with pancreatic cancer, or chemosensi...AIM: To evaluate the significance of BNIP3 in the pathogenesis of pancreatic cancer, we analyzed the relationship between the expression of BNIP3 and survival rate of the patients with pancreatic cancer, or chemosensitivities in pancreatic cancer cell lines, particularly for gemcitabine, the first-line anti-tumor drug for pancreatic cancer. METHODS: To compare the expression level of BNIP3 with the resistance to gemcitabine, eight pancreatic cancer cell lines were subjected to gemcitabine treatment and the quantitative real-time RT-PCR method was used to evaluate BNIP3 expression. Immunohistochemical analysis was also performed using 22 pancreatic cancer specimens to study relationship between BNIP3 expression and survival rate. RESULTS: Although no significantly positive association between BNIP3 mRNA level and gemcitabine chemosensitivity was observed, pancreatic cancer cell lines that were sensitive to gemcitabine treatment tended to show high levels of BNIP3 expression. The converse, an absence of BNIP3 expression, was not correlated with gemcitabine resistance. We further compared the BNIP3 expression profiles of resected primary pancreaticcancer specimens with the prognosis of the patients, and found a tendency of favorable prognosis and low BNIP3 expression. CONCLUSION: High levels of BNIP3 expression cannot be used as one of the predicting factors for gemcitabine chemosensitivity, and some yet to be known factors will have to fill the gap for the accurate prediction of pancreatic cancer chemosensitivity to gemcitabine. However, BNIP3 expression may have an impact on prediction of prognosis of patients with pancreatic cancer.展开更多
目的 探究胰腺癌Bcl-2/腺病毒E1B-19k相关蛋白3(Bcl-2/E1B-19k-interacting protein 3,BNIP3)的蛋白表达水平及其与术后吉西他滨化疗敏感性的关系。方法 回顾性分析2016年7月至2021年8月内蒙古医科大学附属医院58例胰腺癌根治术,并在术...目的 探究胰腺癌Bcl-2/腺病毒E1B-19k相关蛋白3(Bcl-2/E1B-19k-interacting protein 3,BNIP3)的蛋白表达水平及其与术后吉西他滨化疗敏感性的关系。方法 回顾性分析2016年7月至2021年8月内蒙古医科大学附属医院58例胰腺癌根治术,并在术后规律应用吉西他滨辅助化疗或以吉西他滨为主的联合化疗患者的临床资料,选取胰腺癌术后组织切片,对其进行BNIP3免疫组织化学检测,通过实验染色强度及范围进行评分,并分析其与胰腺癌患者预后的关系。结果 与BNIP3低表达组比较,BNIP3高表达组的总生存时间(OS)[13(95%CI 11.378~14.622)个月 vs 18(95%CI 16.592~19.408)个月]和无病生存时间(DFS)[7(95%CI 4.082~9.938)个月 vs 14(95%CI 12.936~15.064)个月]均降低(P<0.05)。BNIP3的蛋白表达水平及淋巴转移情况是OS的独立预后因素,而BNIP3的蛋白表达水平及分化程度是DFS的独立预后因素。结论 胰腺癌组织中BNIP3的蛋白表达水平可能与应用吉西他滨化疗敏感性相关,BNIP3低表达患者行术后吉西他滨化疗的OS与DFS较高表达者更长。展开更多
基金supported by grants from the National Key Research and Development Project(Grant No.2019YFA0905600)the Major State Basic Research Development Program of the Natural Science Foundation of Shandong Province in China(Grant No.ZR2020ZD11)+2 种基金the National Natural Science Foundation of China(Grant Nos.81772633 and 31470967)the Science and Technology Program of Tianjin,China(Grant No.19YFSLQY00110)the Taishan Scholars Program of Shandong Province。
文摘Objective:We aimed to develop a novel anti-HIF-1αintrabody to decrease gemcitabine resistance in pancreatic cancer patients.Methods:Surface plasmon resonance and glutathione S-transferase pull-down assays were conducted to identify the binding affinity and specificity of anti-HIF-1αVHH212[a single-domain antibody(nanobody)].Molecular dynamics simulation was used to determine the protein-protein interactions between hypoxia-inducible factor-1α(HIF-1α)and VHH212.The real-time polymerase chain reaction(PCR)and Western blot analyses were performed to identify the expressions of HIF-1αand VEGF-A in pancreatic ductal adenocarcinoma cell lines.The efficiency of the VHH212 nanobody in inhibiting the HIF-1 signaling pathway was measured using a dual-luciferase reporter assay.Finally,a PANC-1 xenograft model was developed to evaluate the anti-tumor efficiency of combined treatment.Immunohistochemistry analysis was conducted to detect the expressions of HIF-1αand VEGF-A in tumor tissues.Results:VHH212 was stably expressed in tumor cells with low cytotoxicity,high affinity,specific subcellular localization,and neutralization of HIF-1αin the cytoplasm or nucleus.The binding affinity between VHH212 and the HIF-1αPAS-B domain was 42.7 n M.Intrabody competitive inhibition of the HIF-1αheterodimer with an aryl hydrocarbon receptor nuclear translocator was used to inhibit the HIF-1/VEGF pathway in vitro.Compared with single agent gemcitabine,co-treatment with gemcitabine and a VHH212-encoding adenovirus significantly suppressed tumor growth in the xenograft model with 80.44%tumor inhibition.Conclusions:We developed an anti-HIF-1αnanobody and showed the function of VHH212 in a preclinical murine model of PANC-1 pancreatic cancer.The combination of VHH212 and gemcitabine significantly inhibited tumor development.These results suggested that combined use of anti-HIF-1αnanobodies with first-line treatment may in the future be an effective treatment for pancreatic cancer.
基金Grants-in-Aid and the 21st Century COE Program Special Research Grant from the Ministry of Education, Culture, Sports, Science and Technology of Japana Grant-in-Aid for Cancer Research from the Ministry of Health, Labour and Welfare of Japan
文摘AIM: To evaluate the significance of BNIP3 in the pathogenesis of pancreatic cancer, we analyzed the relationship between the expression of BNIP3 and survival rate of the patients with pancreatic cancer, or chemosensitivities in pancreatic cancer cell lines, particularly for gemcitabine, the first-line anti-tumor drug for pancreatic cancer. METHODS: To compare the expression level of BNIP3 with the resistance to gemcitabine, eight pancreatic cancer cell lines were subjected to gemcitabine treatment and the quantitative real-time RT-PCR method was used to evaluate BNIP3 expression. Immunohistochemical analysis was also performed using 22 pancreatic cancer specimens to study relationship between BNIP3 expression and survival rate. RESULTS: Although no significantly positive association between BNIP3 mRNA level and gemcitabine chemosensitivity was observed, pancreatic cancer cell lines that were sensitive to gemcitabine treatment tended to show high levels of BNIP3 expression. The converse, an absence of BNIP3 expression, was not correlated with gemcitabine resistance. We further compared the BNIP3 expression profiles of resected primary pancreaticcancer specimens with the prognosis of the patients, and found a tendency of favorable prognosis and low BNIP3 expression. CONCLUSION: High levels of BNIP3 expression cannot be used as one of the predicting factors for gemcitabine chemosensitivity, and some yet to be known factors will have to fill the gap for the accurate prediction of pancreatic cancer chemosensitivity to gemcitabine. However, BNIP3 expression may have an impact on prediction of prognosis of patients with pancreatic cancer.
文摘目的 探究胰腺癌Bcl-2/腺病毒E1B-19k相关蛋白3(Bcl-2/E1B-19k-interacting protein 3,BNIP3)的蛋白表达水平及其与术后吉西他滨化疗敏感性的关系。方法 回顾性分析2016年7月至2021年8月内蒙古医科大学附属医院58例胰腺癌根治术,并在术后规律应用吉西他滨辅助化疗或以吉西他滨为主的联合化疗患者的临床资料,选取胰腺癌术后组织切片,对其进行BNIP3免疫组织化学检测,通过实验染色强度及范围进行评分,并分析其与胰腺癌患者预后的关系。结果 与BNIP3低表达组比较,BNIP3高表达组的总生存时间(OS)[13(95%CI 11.378~14.622)个月 vs 18(95%CI 16.592~19.408)个月]和无病生存时间(DFS)[7(95%CI 4.082~9.938)个月 vs 14(95%CI 12.936~15.064)个月]均降低(P<0.05)。BNIP3的蛋白表达水平及淋巴转移情况是OS的独立预后因素,而BNIP3的蛋白表达水平及分化程度是DFS的独立预后因素。结论 胰腺癌组织中BNIP3的蛋白表达水平可能与应用吉西他滨化疗敏感性相关,BNIP3低表达患者行术后吉西他滨化疗的OS与DFS较高表达者更长。
