BACKGROUND Cell division cyclin 25C(CDC25C)is a protein that plays a critical role in the cell cycle,specifically in the transition from the G2 phase to the M phase.Recent research has shown that CDC25C could be a pot...BACKGROUND Cell division cyclin 25C(CDC25C)is a protein that plays a critical role in the cell cycle,specifically in the transition from the G2 phase to the M phase.Recent research has shown that CDC25C could be a potential therapeutic target for cancers,particularly for hepatocellular carcinoma(HCC).However,the specific regulatory mechanisms underlying the role of CDC25C in HCC tumorigenesis and development remain incompletely understood.AIM To explore the impact of CDC25C on cell proliferation and apoptosis,as well as its regulatory mechanisms in HCC development.METHODS Hepa1-6 and B16 cells were transduced with a lentiviral vector containing shRNA interference sequences(LV-CDC25C shRNA)to knock down CDC25C.Subsequently,a xenograft mouse model was established by subcutaneously injecting transduced Hepa1-6 cells into C57BL/6 mice to assess the effects of CDC25C knockdown on HCC development in vivo.Cell proliferation and migration were evaluated using a Cell Counting Kit-8 cell proliferation assays and wound healing assays,respectively.The expression of endoplasmic reticulum(ER)stress-related molecules(glucose-regulated protein 78,X-box binding protein-1,and C/EBP homologous protein)was measured in both cells and subcutaneous xenografts using quantitative real-time PCR(qRT-PCR)and western blotting.Additionally,apoptosis was investigated using flow cytometry,qRT-PCR,and western blotting.RESULTS CDC25C was stably suppressed in Hepa1-6 and B16 cells through LV-CDC25C shRNA transduction.A xenograft model with CDC25C knockdown was successfully established and that downregulation of CDC25C expression significantly inhibited HCC growth in mice.CDC25C knockdown not only inhibited cell proliferation and migration but also significantly increased the ER stress response,ultimately promoting ER stress-induced apoptosis in HCC cells.CONCLUSION The regulatory mechanism of CDC25C in HCC development may involve the activation of ER stress and the ER stress-induced apoptosis signaling pathway.展开更多
目的:构建人Cdc25C基因的克隆载体和原核表达载体,并诱导其在大肠杆菌中表达.方法:从人肝癌细胞株Bel-7404中提取总R N A,经RT-P C R法扩增人C d c25C c D N A后,将其正确插入克隆载体pMD18-T和表达载体pET-32a(+),并转化至BL21(DE3)、B...目的:构建人Cdc25C基因的克隆载体和原核表达载体,并诱导其在大肠杆菌中表达.方法:从人肝癌细胞株Bel-7404中提取总R N A,经RT-P C R法扩增人C d c25C c D N A后,将其正确插入克隆载体pMD18-T和表达载体pET-32a(+),并转化至BL21(DE3)、BL21(DE3)pLysS和Transetta(DE3)三种感受态大肠杆菌中,分别采用0.25 mmol/L IPTG和ArtMediaTM Protein Expression自动诱导表达培养基诱导表达,并对纯化的融合蛋白进行考马斯亮蓝染色和质谱分析鉴定.结果:成功扩增了Cdc25C基因,并获得p M D18-T-C d c25C克隆载体和p E T-32a(+)Cdc25C表达载体;重组质粒在BL21(DE3)、BL21(DE3)pLysS和Transetta(DE3)三种感受态大肠杆菌中均诱导表达出TRx-His-Cdc25C融合蛋白;考马斯亮蓝染色和蛋白质谱分析结果显示基因重组蛋白与目的蛋白相符.结论:获得肿瘤相关抗原Cdc25C重组蛋白,为后续研究奠定基础.展开更多
基金Supported by Natural Science Foundation of Guangxi Zhuang Autonomous Region,China,No.2023GXNSFAA026070 and No.2018GXNSFAA281071.
文摘BACKGROUND Cell division cyclin 25C(CDC25C)is a protein that plays a critical role in the cell cycle,specifically in the transition from the G2 phase to the M phase.Recent research has shown that CDC25C could be a potential therapeutic target for cancers,particularly for hepatocellular carcinoma(HCC).However,the specific regulatory mechanisms underlying the role of CDC25C in HCC tumorigenesis and development remain incompletely understood.AIM To explore the impact of CDC25C on cell proliferation and apoptosis,as well as its regulatory mechanisms in HCC development.METHODS Hepa1-6 and B16 cells were transduced with a lentiviral vector containing shRNA interference sequences(LV-CDC25C shRNA)to knock down CDC25C.Subsequently,a xenograft mouse model was established by subcutaneously injecting transduced Hepa1-6 cells into C57BL/6 mice to assess the effects of CDC25C knockdown on HCC development in vivo.Cell proliferation and migration were evaluated using a Cell Counting Kit-8 cell proliferation assays and wound healing assays,respectively.The expression of endoplasmic reticulum(ER)stress-related molecules(glucose-regulated protein 78,X-box binding protein-1,and C/EBP homologous protein)was measured in both cells and subcutaneous xenografts using quantitative real-time PCR(qRT-PCR)and western blotting.Additionally,apoptosis was investigated using flow cytometry,qRT-PCR,and western blotting.RESULTS CDC25C was stably suppressed in Hepa1-6 and B16 cells through LV-CDC25C shRNA transduction.A xenograft model with CDC25C knockdown was successfully established and that downregulation of CDC25C expression significantly inhibited HCC growth in mice.CDC25C knockdown not only inhibited cell proliferation and migration but also significantly increased the ER stress response,ultimately promoting ER stress-induced apoptosis in HCC cells.CONCLUSION The regulatory mechanism of CDC25C in HCC development may involve the activation of ER stress and the ER stress-induced apoptosis signaling pathway.
文摘目的:构建人Cdc25C基因的克隆载体和原核表达载体,并诱导其在大肠杆菌中表达.方法:从人肝癌细胞株Bel-7404中提取总R N A,经RT-P C R法扩增人C d c25C c D N A后,将其正确插入克隆载体pMD18-T和表达载体pET-32a(+),并转化至BL21(DE3)、BL21(DE3)pLysS和Transetta(DE3)三种感受态大肠杆菌中,分别采用0.25 mmol/L IPTG和ArtMediaTM Protein Expression自动诱导表达培养基诱导表达,并对纯化的融合蛋白进行考马斯亮蓝染色和质谱分析鉴定.结果:成功扩增了Cdc25C基因,并获得p M D18-T-C d c25C克隆载体和p E T-32a(+)Cdc25C表达载体;重组质粒在BL21(DE3)、BL21(DE3)pLysS和Transetta(DE3)三种感受态大肠杆菌中均诱导表达出TRx-His-Cdc25C融合蛋白;考马斯亮蓝染色和蛋白质谱分析结果显示基因重组蛋白与目的蛋白相符.结论:获得肿瘤相关抗原Cdc25C重组蛋白,为后续研究奠定基础.
