The potential efficacy and clinical feasibility of gene therapy for liver cancer were tested through therecombinant adenovirus-mediated (Ad-multigenes ) co-transfer of human wild-type p53, B7-l co-stimulation(CD8o) an...The potential efficacy and clinical feasibility of gene therapy for liver cancer were tested through therecombinant adenovirus-mediated (Ad-multigenes ) co-transfer of human wild-type p53, B7-l co-stimulation(CD8o) and granulocyte-macrophage colony-stimulating factor (GM-CSF) genes into human hepatocellular carcinoma cell lines. The treated cells underwent apoptosis with specific DNA fragmentation and became more sensitiveto cisplatin, a chemotherapeutic drug. Their growth was partly inhibited. Efficient proliferation and generation ofCTLs and cytokine production were induced in mixed lymphocytes through tumor cell reaction (MLTR) using peripheral blood T lymphocytes from donors as effector cells and Ad-multigenes or Ad-p53-transfected human hepatocellular carcinoma cells (HepG2 or BEL7402) as stimulator cells. Ad-multigenes-transfected rat carcinosarcomaWalker 256 cells were inoculated subcutaneously into normal rats. Fourteen days later, the activity of spleen cellsin rats inoculated with Ad-multigenes-transduced Walker 256 cells was higher than that in Ad-p53-transducedones. These findings suggest that adenovirus-mediated multigenes p53, B7-1 and GM-CSF can induce apoptosis ofliver cancer cells and initiate a potent antitumor immune response against them.展开更多
目的探讨乳腺癌缺失基因1(deleted in breast cancer 1,DBC1)对肝癌细胞增殖和凋亡的影响。方法构建pcDNA3.1-DBC1的正义表达载体,转染肝癌细胞SMMC-7721,MTT法检测DBC1对肝癌细胞SMMC-7721生长增殖的影响,采用流式细胞术(FCM)检测DBC1...目的探讨乳腺癌缺失基因1(deleted in breast cancer 1,DBC1)对肝癌细胞增殖和凋亡的影响。方法构建pcDNA3.1-DBC1的正义表达载体,转染肝癌细胞SMMC-7721,MTT法检测DBC1对肝癌细胞SMMC-7721生长增殖的影响,采用流式细胞术(FCM)检测DBC1对肝癌细胞SMMC-7721的细胞周期和细胞凋亡的影响。结果与转染空载体的SMMC-7721细胞相比,pcDNA3.1-DBC1正义表达载体转染上调DBC1的表达,可显著抑制肝癌细胞(SMMC-7721)增殖,升高G1期细胞比例(51.0%vs 64.9%,P=0.002),降低S期细胞比例(29.7%vs 14.0%,P<0.001),诱导细胞凋亡(8.8%vs 24.6%,P<0.001)。结论 DBC1通过抑制肿瘤细胞增殖,阻滞细胞周期进展,促进细胞凋亡,抑制肝癌的发生和发展。展开更多
目的:初步探讨肝癌缺失基因1(deleted in livercancer 1,DLC1)对人卵巢癌细胞株OVCAR-3增殖和迁移的影响。方法:采用脂质体介导重组质粒pEGFP-C3-DLC1转染人卵巢癌OVCAR-3细胞后,RT-PCR及蛋白质印迹法检测DLC1mRNA和蛋白的表达。MTT法、...目的:初步探讨肝癌缺失基因1(deleted in livercancer 1,DLC1)对人卵巢癌细胞株OVCAR-3增殖和迁移的影响。方法:采用脂质体介导重组质粒pEGFP-C3-DLC1转染人卵巢癌OVCAR-3细胞后,RT-PCR及蛋白质印迹法检测DLC1mRNA和蛋白的表达。MTT法、FCM法和Transwell小室法分别评价DLC1基因转染前后细胞增殖、细胞周期和细胞迁移能力的变化,蛋白质印迹法检测黏着斑激酶(focaladhesionkinase,FAK)和c-Jun氨基末端蛋白激酶(c-Jun NH2-terminalprotein kinase,JNK)蛋白及其磷酸化水平的变化。结果:成功转染pEGFP-C3-DLC1后,OVCAR-3细胞中可检测到DLC1mRNA和蛋白的稳定表达。稳定转染DLC1基因后,OVCAR-3细胞的增殖和迁移能力受到明显抑制,而且停滞于G0/G1期的细胞比例增加,差异均有统计学意义(均为P<0.01)。转染DLC1基因后的OVCAR-3细胞中p-FAK(Y925)和p-JNK(Thr183/Tyr185)蛋白表达水平降低,差异有统计学意义(P<0.01)。结论:DLC1基因转染OVCAR-3细胞后可能通过下调p-FAK(Y925)和p-JNK(Thr183/Tyr185)蛋白表达水平,使OVCAR-3细胞停滞于G0/G1期,从而抑制OVCAR-3细胞的体外增殖和迁移能力。展开更多
文摘The potential efficacy and clinical feasibility of gene therapy for liver cancer were tested through therecombinant adenovirus-mediated (Ad-multigenes ) co-transfer of human wild-type p53, B7-l co-stimulation(CD8o) and granulocyte-macrophage colony-stimulating factor (GM-CSF) genes into human hepatocellular carcinoma cell lines. The treated cells underwent apoptosis with specific DNA fragmentation and became more sensitiveto cisplatin, a chemotherapeutic drug. Their growth was partly inhibited. Efficient proliferation and generation ofCTLs and cytokine production were induced in mixed lymphocytes through tumor cell reaction (MLTR) using peripheral blood T lymphocytes from donors as effector cells and Ad-multigenes or Ad-p53-transfected human hepatocellular carcinoma cells (HepG2 or BEL7402) as stimulator cells. Ad-multigenes-transfected rat carcinosarcomaWalker 256 cells were inoculated subcutaneously into normal rats. Fourteen days later, the activity of spleen cellsin rats inoculated with Ad-multigenes-transduced Walker 256 cells was higher than that in Ad-p53-transducedones. These findings suggest that adenovirus-mediated multigenes p53, B7-1 and GM-CSF can induce apoptosis ofliver cancer cells and initiate a potent antitumor immune response against them.
文摘目的探讨乳腺癌缺失基因1(deleted in breast cancer 1,DBC1)对肝癌细胞增殖和凋亡的影响。方法构建pcDNA3.1-DBC1的正义表达载体,转染肝癌细胞SMMC-7721,MTT法检测DBC1对肝癌细胞SMMC-7721生长增殖的影响,采用流式细胞术(FCM)检测DBC1对肝癌细胞SMMC-7721的细胞周期和细胞凋亡的影响。结果与转染空载体的SMMC-7721细胞相比,pcDNA3.1-DBC1正义表达载体转染上调DBC1的表达,可显著抑制肝癌细胞(SMMC-7721)增殖,升高G1期细胞比例(51.0%vs 64.9%,P=0.002),降低S期细胞比例(29.7%vs 14.0%,P<0.001),诱导细胞凋亡(8.8%vs 24.6%,P<0.001)。结论 DBC1通过抑制肿瘤细胞增殖,阻滞细胞周期进展,促进细胞凋亡,抑制肝癌的发生和发展。
