目的探讨抑制人肺癌相关抗原基因ALT04-AG表达对细胞生长特性及相关基因表达的影响。方法重组反义ALT04-AGRNA真核表达质粒,经脂质体介导转染人肺癌细胞株(L78),以MTT、FCM法分析转染细胞生长特性,以Northern b lot、免疫组化染色及基...目的探讨抑制人肺癌相关抗原基因ALT04-AG表达对细胞生长特性及相关基因表达的影响。方法重组反义ALT04-AGRNA真核表达质粒,经脂质体介导转染人肺癌细胞株(L78),以MTT、FCM法分析转染细胞生长特性,以Northern b lot、免疫组化染色及基因芯片技术检测相关基因的表达。结果构建了重组表达反义ALT04-AGRNA的真核表达质粒[pALT04-AG(as)],经该质粒转染及二氟甲基鸟氨酸(d ifluorom ethylorn ith ine,DFMO)处理的L78细胞均引起ALT04-AG表达下调及细胞的增殖抑制,后者还导致细胞凋亡比例增加。结论pALT04-AG(as)转染L78细胞或用DFMO抑制多胺生物合成,可通过对相关基因表达的调控促使L78细胞恶性表型逆转,而后者的作用更为广泛。本结果为探索肿瘤的诊断与治疗提供了有意义的线索。展开更多
AIM: To study at transcriptional level the similarities and differences of the physiological and biochemical activities between liver tumor (LT) and regenerating liver cells. METHODS: LT-associated genes and their exp...AIM: To study at transcriptional level the similarities and differences of the physiological and biochemical activities between liver tumor (LT) and regenerating liver cells. METHODS: LT-associated genes and their expression changes in LT were obtained from databases and scientific articles, and their expression profiles in rat liver regeneration (LR) were detected using Rat Genome 230 2.0 array. Subsequently their expression changes in LT and LR were compared and analyzed. RESULTS: One hundred and twenty one LT-associated genes were found to be LR-associated. Thirty four genes were up-regulated, and 14 genes were down-regulated in both LT and regenerating liver; 20 genes up-regulated in LT were down-regulated in regenerating liver; 21 up-regulated genes and 16 down-regulated genes in LT were up-regulated at some time points and down-regulated at others during LR. CONCLUSION: Results suggested that apoptosis activity suppressed in LT was still active in regenerating liver, and there are lots of similarities and differences between the LT and regenerating liver at the aspects of cell growth, proliferation, differentiation, migration and angiogenesis.展开更多
基金Supported by the National Basic Research 973 Pre-research Program of China, No. 2006CB708506
文摘AIM: To study at transcriptional level the similarities and differences of the physiological and biochemical activities between liver tumor (LT) and regenerating liver cells. METHODS: LT-associated genes and their expression changes in LT were obtained from databases and scientific articles, and their expression profiles in rat liver regeneration (LR) were detected using Rat Genome 230 2.0 array. Subsequently their expression changes in LT and LR were compared and analyzed. RESULTS: One hundred and twenty one LT-associated genes were found to be LR-associated. Thirty four genes were up-regulated, and 14 genes were down-regulated in both LT and regenerating liver; 20 genes up-regulated in LT were down-regulated in regenerating liver; 21 up-regulated genes and 16 down-regulated genes in LT were up-regulated at some time points and down-regulated at others during LR. CONCLUSION: Results suggested that apoptosis activity suppressed in LT was still active in regenerating liver, and there are lots of similarities and differences between the LT and regenerating liver at the aspects of cell growth, proliferation, differentiation, migration and angiogenesis.
