BACKGROUND Breast cancer(BC) remains a public health problem. Tamoxifen(TAM) resistance has caused great difficulties for treatment of BC patients. Eukaryotic translation initiation factor 4E binding protein 1(EIF4EBP...BACKGROUND Breast cancer(BC) remains a public health problem. Tamoxifen(TAM) resistance has caused great difficulties for treatment of BC patients. Eukaryotic translation initiation factor 4E binding protein 1(EIF4EBP1) plays critical roles in the tumorigenesis and progression of BC. However, the expression and mechanism of EIF4EBP1 in determining the efficacy of TAM therapy in BC patients are still unclear.AIM To investigate the expression and functions of EIF4EBP1 in determining the efficacy of TAM therapy in BC patients.METHODS High-throughput sequencing data of breast tumors were downloaded from the Gene Expression Omnibus database. Differential gene expression analysis identified EIF4EBP1 to be significantly upregulated in cancer tissues. Its prognostic value was analyzed. The biological function and related pathways of EIF4EBP1 was analyzed. Subsequently, the expression of EIF4EBP1 was determined by real-time reverse transcription polymerase chain reaction and western blotting. Cell Counting Kit-8 assays, colony formation assay and wound healing assay were used to understand the phenotypes of function of EIF4EBP1.RESULTS EIF4EBP1 was upregulated in the TAM-resistant cells, and EIF4EBP1 was related to the prognosis of BC patients. Gene Set Enrichment Analysis showed that EIF4EBP1 might be involved in Hedgehog signaling pathways. Decreasing the expression of EIF4EBP1 could reverse TAM resistance, whereas overexpression of EIF4EBP1 promoted TAM resistance.CONCLUSION This study indicated that EIF4EBP1 was overexpressed in the BC and TAM-resistant cell line, which increased cell proliferation, invasion, migration and TAM resistance in BC cells.展开更多
目的探讨神经元细胞KCC2、NKCC1及4E-BP1在外伤性癫痫致痫灶中的表达及其临床意义。方法选择2017年1月-2019年6月本院接诊外伤性癫痫患者37例纳入研究组,经手术切除癫痫致癫灶;同期,另选择于单纯脑外伤患者40例纳入对照组,分别于脑外伤...目的探讨神经元细胞KCC2、NKCC1及4E-BP1在外伤性癫痫致痫灶中的表达及其临床意义。方法选择2017年1月-2019年6月本院接诊外伤性癫痫患者37例纳入研究组,经手术切除癫痫致癫灶;同期,另选择于单纯脑外伤患者40例纳入对照组,分别于脑外伤后6 h内手术获取脑组织样本。通过蛋白质印迹法测定外伤性癫痫致癫灶中KCC2、NKCC1、4E-BP1表达,并利用RT-PCR法测定外伤性癫痫致癫灶中KCC2 m RNA、NKCC1 m RNA、4E-BP1m RNA相对表达量。结果蛋白质印迹法检测显示:研究组患者的神经元细胞KCC2相对灰度值低于对照组,差异有统计学意义(P <0.05);研究组患者的神经元细胞NKCC1、4E-BP1相对灰度值均高于对照组,差异有统计学意义(P <0.05);RT-PCR检测显示:研究组患者的致癫灶中KCC2 m RNA相对表达量低于对照组,差异有统计学意义(P <0.05);研究组患者的致癫灶中NKCC1 m RNA、4E-BP1 m RNA相对表达量均高于对照组,差异有统计学意义(P <0.05)。结论神经元细胞KCC2、NKCC1及4E-BP1为脑外伤后患者脑组织的组织学改变、癫痫反复发作主要分子机制;KCC2在外伤性癫痫致癫灶中表达异常降低,而神经元细胞NKCC1、4E-BP1的表达异常增高,可以作为外伤性癫痫致痫灶靶向诊断因子。展开更多
Background Everolimus, a derivative of sirolimus, is a potent immunosuppressant that has important anti-proliferative properties. In the present study, we demonstrated the inhibiting neointimal hyperplasia in injured ...Background Everolimus, a derivative of sirolimus, is a potent immunosuppressant that has important anti-proliferative properties. In the present study, we demonstrated the inhibiting neointimal hyperplasia in injured carotid arteries in rats by using two different doses of everolimus administrated via the oral route for a long time. Methods A rat model of carotid artery injury was established by balloon inflation. Eighty rats were randomly divided into the sham-operated group （n=20）, injury group （n=20）, low dosage of everolimus group （n=20）, and high dosage of everolimus group （n=20）. The low close of everolimus （1.5 mg/kg） was given one day before injuring the carotid artery by balloon, followed by 0.75 mg/kg per day for 28 days via intragastric gavage. High dose everolimus （2.5 mg/kg） was given one day before injuring the carotid artery by balloon, followed by 1 mg/kg per day for 28 days. Expression of eukaryotic translation initiation factor 4E （elF-4E） and phosphorylation of ribosomal proteinS6 kinase 1 （P70S6K） were determined by reverse transcription-polymerase chain reaction and Western blotting analysis. Results In the injured carotid artery, neointimal hyperplasia was normally observed four weeks after injury. Everolimus inhibited neointimal hyperplasia after balloon injury in a dose dependent manner. At the same time, the study demonstrated that everolimus reduced the expression of P-P70S6K, elF-4E, transforming growth factor （TGF）-131 and of proliferating cell nuclear antigen （PCNA）. Conclusions Everolimus significantly inhibited neointimal hyperplasia of the injured carotid artery. The effect depended on dosaqe and was associated with the reduction of phosphorylation of P70S6K and the elF-4E expression level.展开更多
文摘BACKGROUND Breast cancer(BC) remains a public health problem. Tamoxifen(TAM) resistance has caused great difficulties for treatment of BC patients. Eukaryotic translation initiation factor 4E binding protein 1(EIF4EBP1) plays critical roles in the tumorigenesis and progression of BC. However, the expression and mechanism of EIF4EBP1 in determining the efficacy of TAM therapy in BC patients are still unclear.AIM To investigate the expression and functions of EIF4EBP1 in determining the efficacy of TAM therapy in BC patients.METHODS High-throughput sequencing data of breast tumors were downloaded from the Gene Expression Omnibus database. Differential gene expression analysis identified EIF4EBP1 to be significantly upregulated in cancer tissues. Its prognostic value was analyzed. The biological function and related pathways of EIF4EBP1 was analyzed. Subsequently, the expression of EIF4EBP1 was determined by real-time reverse transcription polymerase chain reaction and western blotting. Cell Counting Kit-8 assays, colony formation assay and wound healing assay were used to understand the phenotypes of function of EIF4EBP1.RESULTS EIF4EBP1 was upregulated in the TAM-resistant cells, and EIF4EBP1 was related to the prognosis of BC patients. Gene Set Enrichment Analysis showed that EIF4EBP1 might be involved in Hedgehog signaling pathways. Decreasing the expression of EIF4EBP1 could reverse TAM resistance, whereas overexpression of EIF4EBP1 promoted TAM resistance.CONCLUSION This study indicated that EIF4EBP1 was overexpressed in the BC and TAM-resistant cell line, which increased cell proliferation, invasion, migration and TAM resistance in BC cells.
文摘目的探讨神经元细胞KCC2、NKCC1及4E-BP1在外伤性癫痫致痫灶中的表达及其临床意义。方法选择2017年1月-2019年6月本院接诊外伤性癫痫患者37例纳入研究组,经手术切除癫痫致癫灶;同期,另选择于单纯脑外伤患者40例纳入对照组,分别于脑外伤后6 h内手术获取脑组织样本。通过蛋白质印迹法测定外伤性癫痫致癫灶中KCC2、NKCC1、4E-BP1表达,并利用RT-PCR法测定外伤性癫痫致癫灶中KCC2 m RNA、NKCC1 m RNA、4E-BP1m RNA相对表达量。结果蛋白质印迹法检测显示:研究组患者的神经元细胞KCC2相对灰度值低于对照组,差异有统计学意义(P <0.05);研究组患者的神经元细胞NKCC1、4E-BP1相对灰度值均高于对照组,差异有统计学意义(P <0.05);RT-PCR检测显示:研究组患者的致癫灶中KCC2 m RNA相对表达量低于对照组,差异有统计学意义(P <0.05);研究组患者的致癫灶中NKCC1 m RNA、4E-BP1 m RNA相对表达量均高于对照组,差异有统计学意义(P <0.05)。结论神经元细胞KCC2、NKCC1及4E-BP1为脑外伤后患者脑组织的组织学改变、癫痫反复发作主要分子机制;KCC2在外伤性癫痫致癫灶中表达异常降低,而神经元细胞NKCC1、4E-BP1的表达异常增高,可以作为外伤性癫痫致痫灶靶向诊断因子。
文摘Background Everolimus, a derivative of sirolimus, is a potent immunosuppressant that has important anti-proliferative properties. In the present study, we demonstrated the inhibiting neointimal hyperplasia in injured carotid arteries in rats by using two different doses of everolimus administrated via the oral route for a long time. Methods A rat model of carotid artery injury was established by balloon inflation. Eighty rats were randomly divided into the sham-operated group （n=20）, injury group （n=20）, low dosage of everolimus group （n=20）, and high dosage of everolimus group （n=20）. The low close of everolimus （1.5 mg/kg） was given one day before injuring the carotid artery by balloon, followed by 0.75 mg/kg per day for 28 days via intragastric gavage. High dose everolimus （2.5 mg/kg） was given one day before injuring the carotid artery by balloon, followed by 1 mg/kg per day for 28 days. Expression of eukaryotic translation initiation factor 4E （elF-4E） and phosphorylation of ribosomal proteinS6 kinase 1 （P70S6K） were determined by reverse transcription-polymerase chain reaction and Western blotting analysis. Results In the injured carotid artery, neointimal hyperplasia was normally observed four weeks after injury. Everolimus inhibited neointimal hyperplasia after balloon injury in a dose dependent manner. At the same time, the study demonstrated that everolimus reduced the expression of P-P70S6K, elF-4E, transforming growth factor （TGF）-131 and of proliferating cell nuclear antigen （PCNA）. Conclusions Everolimus significantly inhibited neointimal hyperplasia of the injured carotid artery. The effect depended on dosaqe and was associated with the reduction of phosphorylation of P70S6K and the elF-4E expression level.
