OBJECTIVE: To develop a new kind of vector system called gene-viral vector, which combines the advantages of gene and virus therapies. METHODS: Using recombinant technology, an anti-tumor gene was inserted into the ge...OBJECTIVE: To develop a new kind of vector system called gene-viral vector, which combines the advantages of gene and virus therapies. METHODS: Using recombinant technology, an anti-tumor gene was inserted into the genome of replicative virus specific for tumor cells. The cell killing effect, reporter gene expression of the green fluorescence protein, anti-tumor gene expression of mouse interleukin-12 (mIL-12) and replication of virus were observed by the methods of cell pathology, fluorescence microscopy, ELISA and electron microscopy, respectively. RESULTS: A new kind of gene-viral vector system of adenovirus, in which the E1b-55 kD gene was deleted but the E1a gene was preserved, was constructed. The vector system, like the replicative virus ONYX-015, replicated and proliferated in tumor cells but not in normal ones. Our vector had an advantage over ONYX-015 in that it carried different kinds of anti-tumor genes to enhance its therapeutic effect. The reporter gene expression of the green fluorescence protein in tumor cells was much better than the adenovirus vector employed in conventional gene the rapy, and the expression in our vector system was as low as or even less than that in the conventional adenovirus gene therapy system. Similar results were observed in experiments with this vector system carrying the anti-tumor gene mIL-12. Replication and proliferation of the virus carrying the mIL-12 gene in tumor cells were confirmed by electron microscopy. CONCLUSIONS: Gene-viral vectors are new vectors with an anti-tumor gene inserted into the genome of replicative virus specific for tumor cells. Because of the specific replication and proliferation of the virus in tumor cells, expression of the anti-tumor gene is increased hundreds to thousands of times. This approach takes full advantages of gene therapy and virus therapy to enhance the effect on the tumor. It overcomes the disadvantages of conventional gene therapy, such as low transfer rate, low gene expression, lack of target tropism, and low anti-tumor activity. We believe that this is a promising means for future tumor treatment.展开更多
CRISPR/Cas9 is a versatile genome-editing tool which is widely used for modifying the genome of both prokaryotic and eukaryotic organisms for basic research and applications. An increasing number of reports have demon...CRISPR/Cas9 is a versatile genome-editing tool which is widely used for modifying the genome of both prokaryotic and eukaryotic organisms for basic research and applications. An increasing number of reports have demonstrated that CRISPR/Cas9-mediated genome editing is a powerful technology for gene therapy. Here, we review the recent advances in CRISPR/Cas9-mediated gene therapy in animal models via different strategies and discuss the challenges as well as future prospects.展开更多
The article ＂Cationic liposome-mediated transfection of CD40 ligand gene inhibits hepatic tumor growth of hepatocellular carcinoma in mice＂ [doi： 10. 1631/jzus.B0820178] by Jiang et al.（2009） in a recent issue of...The article ＂Cationic liposome-mediated transfection of CD40 ligand gene inhibits hepatic tumor growth of hepatocellular carcinoma in mice＂ [doi： 10. 1631/jzus.B0820178] by Jiang et al.（2009） in a recent issue of the Journal of Zhejiang University SCIENCE B was highly thought provoking. The authors have clearly demonstrated the efficacy of CD40 ligand gene therapy in inhibiting the growth of hepatocellular carcinomas. The findings of Jiang et al.（2009） are highly important as they further support and corroborate the rapidly expanding role of CD40 ligand gene therapy in the management of systemic malignancies besides hepatocellular carcinomas.展开更多
文摘OBJECTIVE: To develop a new kind of vector system called gene-viral vector, which combines the advantages of gene and virus therapies. METHODS: Using recombinant technology, an anti-tumor gene was inserted into the genome of replicative virus specific for tumor cells. The cell killing effect, reporter gene expression of the green fluorescence protein, anti-tumor gene expression of mouse interleukin-12 (mIL-12) and replication of virus were observed by the methods of cell pathology, fluorescence microscopy, ELISA and electron microscopy, respectively. RESULTS: A new kind of gene-viral vector system of adenovirus, in which the E1b-55 kD gene was deleted but the E1a gene was preserved, was constructed. The vector system, like the replicative virus ONYX-015, replicated and proliferated in tumor cells but not in normal ones. Our vector had an advantage over ONYX-015 in that it carried different kinds of anti-tumor genes to enhance its therapeutic effect. The reporter gene expression of the green fluorescence protein in tumor cells was much better than the adenovirus vector employed in conventional gene the rapy, and the expression in our vector system was as low as or even less than that in the conventional adenovirus gene therapy system. Similar results were observed in experiments with this vector system carrying the anti-tumor gene mIL-12. Replication and proliferation of the virus carrying the mIL-12 gene in tumor cells were confirmed by electron microscopy. CONCLUSIONS: Gene-viral vectors are new vectors with an anti-tumor gene inserted into the genome of replicative virus specific for tumor cells. Because of the specific replication and proliferation of the virus in tumor cells, expression of the anti-tumor gene is increased hundreds to thousands of times. This approach takes full advantages of gene therapy and virus therapy to enhance the effect on the tumor. It overcomes the disadvantages of conventional gene therapy, such as low transfer rate, low gene expression, lack of target tropism, and low anti-tumor activity. We believe that this is a promising means for future tumor treatment.
基金supported by the National Natural Science Foundation of China (31371455, 31171318 to Dali Li, 81330049 to Mingyao Liu)the Science and Technology Commission of Shanghai Municipality (14140900300 to Dali Li)
文摘CRISPR/Cas9 is a versatile genome-editing tool which is widely used for modifying the genome of both prokaryotic and eukaryotic organisms for basic research and applications. An increasing number of reports have demonstrated that CRISPR/Cas9-mediated genome editing is a powerful technology for gene therapy. Here, we review the recent advances in CRISPR/Cas9-mediated gene therapy in animal models via different strategies and discuss the challenges as well as future prospects.
文摘The article ＂Cationic liposome-mediated transfection of CD40 ligand gene inhibits hepatic tumor growth of hepatocellular carcinoma in mice＂ [doi： 10. 1631/jzus.B0820178] by Jiang et al.（2009） in a recent issue of the Journal of Zhejiang University SCIENCE B was highly thought provoking. The authors have clearly demonstrated the efficacy of CD40 ligand gene therapy in inhibiting the growth of hepatocellular carcinomas. The findings of Jiang et al.（2009） are highly important as they further support and corroborate the rapidly expanding role of CD40 ligand gene therapy in the management of systemic malignancies besides hepatocellular carcinomas.
