1
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Zheng F, Kawabe Y, Murakami M, Takahashi M, Nishihata K, Yoshida S, Ito A, Kamihira M. LINE-1 vectors mediate recombinant antibody gene transfer by retrotransposition in Chinese hamster ovary cells. Biotechnol J 2021; 16:e2000620. [PMID: 33938150 DOI: 10.1002/biot.202000620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/26/2021] [Accepted: 04/28/2021] [Indexed: 11/09/2022]
Abstract
Retrotransposons, such as long interspersed element-1 (LINE-1), can copy themselves to other genomic loci via a transposition event (termed retrotransposition). Retrotransposons, therefore, have potential use as an efficient gene delivery tool to integrate multiple copies of a target gene into a host genome. Here, we developed a retrotransposon vector based on LINE-1 that achieves target gene integration of multiple transgene copies. The retrotransposon vector contains a neomycin resistance gene split by an intron as a marker gene, and a gene encoding an antibody single-chain variable fragment (Fv) fused with the constant antibody region (Fc) (scFv-Fc) as a model target gene. G418-resistant Chinese hamster ovary cells were generated using this retrotransposon vector, and scFv-Fc was produced in the culture medium. To regulate retrotransposition, we developed a retrotransposon vector system that separately expressed the two open reading frames (ORF1 and ORF2) of LINE-1. Genomic PCR analysis detected the transgene sequence in almost all tested clones. Compared with clones established using the intact LINE-1 vector, clones generated with the split ORF1 and ORF2 system showed similar specific scFv-Fc productivity and retrotransposition efficiency. This approach of using a retrotransposon-based vector system has the potential to provide a new gene delivery tool for mammalian cells.
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Affiliation(s)
- Feiyang Zheng
- Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Yoshinori Kawabe
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Mai Murakami
- Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Mamika Takahashi
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Kyoka Nishihata
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Souichiro Yoshida
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Akira Ito
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Masamichi Kamihira
- Graduate School of Systems Life Sciences, Kyushu University, Nishi-ku, Fukuoka, Japan.,Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
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2
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Sharma BS, Prabhakaran V, Verma RJ. Design of non-viral vector with improved regulatory features towards therapeutic application. Bioinformation 2020; 16:307-313. [PMID: 32773990 PMCID: PMC7392091 DOI: 10.6026/97320630016307] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 04/02/2020] [Indexed: 12/24/2022] Open
Abstract
Viral vectors based gene therapy is often compromised by adverse immunological reactions raising safety concerns. Hence, improved design and development of non-viral vectors with strong regulatory regions is desired. We describe the design of a non-viral mammalian expression vector in which the primary transgene (a truncated dystrophin gene linked with Duchenne muscular dystrophy (DMD)) named microdystrophin delR4-R23/delCT (MD1) is under the transcriptional control of elements of desmin locus control region (DES-LCR). The designed vector, named as DES-LCR/MD1-EGFP, was constructed by cloning two fragments into the pBluescript backbone. Fragment 1 contains DES-LCR enhancer and DES-LCR promoter region while fragment 2 contains MD1 transgene and reporter EGFP (enhanced green fluorescent protein) gene separated by linker P2A (2A peptide). This vector design provides a framework for strong regulation with non-viral features. This design forms the foundation for application in conditions linked to multisystem diseases.
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Affiliation(s)
- B Sharan Sharma
- Indrashil Institute of Science and Technology (IIST)/Indrashil University (IU), Kadi, Mehsana-382740, Gujarat, India.,Department of Zoology, Biomedical Technology and Human Genetics, University School of Sciences, Gujarat University, Navrangpura, Ahmedabad-380009, Gujarat, India
| | - Vaishna Prabhakaran
- Indrashil Institute of Science and Technology (IIST)/Indrashil University (IU), Kadi, Mehsana-382740, Gujarat, India
| | - Ramtej J Verma
- Department of Zoology, Biomedical Technology and Human Genetics, University School of Sciences, Gujarat University, Navrangpura, Ahmedabad-380009, Gujarat, India
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3
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Fang SY, Hu CQ, Liu MN, Tao L, Wang Y, Gong MJ, He Y, He TC, Bi Y. Reversibly immortalized hepatic progenitor cell line containing double suicide genes. Int J Mol Med 2018; 42:1977-1986. [PMID: 30085335 PMCID: PMC6108856 DOI: 10.3892/ijmm.2018.3803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 08/01/2018] [Indexed: 01/14/2023] Open
Abstract
A large number of functional hepatocytes is required for bioartificial liver therapy. Simian virus 40 T-antigen (SV40T) has been previously reported to improve the immortalized proliferation of primary hepatocytes to generate a sufficient number of cells; however, these long-term immortalized hepatocytes may induce further malignant transformation in vivo. In the present study, the SV40T immortalization gene and two suicide genes, herpes simplex virus thymidine kinase (HSV-tk) and cytosine deaminase (CD), were transducted into primary hepatocytes to construct a novel type of Cre/LoxP-mediated reversible immortalized hepatocyte line. Polymerase chain reaction analysis and western blotting confirmed that the SV40T, HSV-tk and CD genes were successfully inserted into hepatic progenitor cells and their expression was controlled by Cre/LoxP recombination. Total removal of SV40T could be achieved via the ganciclovir (GCV)/HSV-tk suicide system. Cells maintained their biosafety in vivo with CD gene expression and 5-fluoro-cytosine (5-FC) induced cell death. Following transplantation into the carbon tetrachloride (CCl4) model group, the majority of cells had survived after 14 days post-implantation and a number of the cells had transported into the liver parenchyma. When compared with the CCl4 model group, the transplanted cells repaired the liver biochemical index and pathological structure markedly. Thus, the present study reports a novel reversible immortalized hepatocyte with double suicide genes, which exhibited the cellular phenotype and recovery function of normal liver cells. This method maximally guaranteed the biological safety of immortalized hepatocytes for in vivo application, providing a reliable, safe and ideal cell material for the artificial liver technique.
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Affiliation(s)
- Shu-Yu Fang
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Chao-Qun Hu
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Meng-Nan Liu
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Li Tao
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Yi Wang
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Meng-Jia Gong
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Yun He
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Tong-Chuan He
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
| | - Yang Bi
- Department of Pediatric Surgery, Stem Cell Biology and Therapy Laboratory, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Stem Cell Therapy Engineering Technical Center, The Children's Hospital of Chongqing Medical University, Chongqing 400014, P.R. China
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4
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Gong Z, Ma Q, Wang X, Cai Q, Gong X, Genchev GZ, Lu H, Zeng F. A Herpes Simplex Virus Thymidine Kinase-Induced Mouse Model of Hepatocellular Carcinoma Associated with Up-Regulated Immune-Inflammatory-Related Signals. Genes (Basel) 2018; 9:E380. [PMID: 30060537 PMCID: PMC6115908 DOI: 10.3390/genes9080380] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/19/2018] [Accepted: 07/23/2018] [Indexed: 12/11/2022] Open
Abstract
Inflammation and fibrosis in human liver are often precursors to hepatocellular carcinoma (HCC), yet none of them is easily modeled in animals. We previously generated transgenic mice with hepatocyte-specific expressed herpes simplex virus thymidine kinase (HSV-tk). These mice would develop hepatitis with the administration of ganciclovir (GCV)(Zhang, 2005 #1). However, our HSV-tk transgenic mice developed hepatitis and HCC tumor as early as six months of age even without GCV administration. We analyzed the transcriptome of the HSV-tk HCC tumor and hepatitis tissue using microarray analysis to investigate the possible causes of HCC. Gene Ontology (GO) enrichment analysis showed that the up-regulated genes in the HCC tissue mainly include the immune-inflammatory and cell cycle genes. The down-regulated genes in HCC tumors are mainly concentrated in the regions related to lipid metabolism. Gene set enrichment analysis (GSEA) showed that immune-inflammatory-related signals in the HSV-tk mice are up-regulated compared to those in Notch mice. Our study suggests that the immune system and inflammation play an important role in HCC development in HSV-tk mice. Specifically, increased expression of immune-inflammatory-related genes is characteristic of HSV-tk mice and that inflammation-induced cell cycle activation maybe a precursory step to cancer. The HSV-tk mouse provides a suitable model for the study of the relationship between immune-inflammation and HCC, and their underlying mechanism for the development of therapeutic application in the future.
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Affiliation(s)
- Zhijuan Gong
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200040, China.
- Department of Histo-Embryology, Genetics and Developmental Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
- Key Laboratory of Embryo Molecular Biology, Ministry of Health & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai 200040, China.
| | - Qingwen Ma
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200040, China.
- Key Laboratory of Embryo Molecular Biology, Ministry of Health & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai 200040, China.
| | - Xujun Wang
- SJTU-Yale Joint Center for Biostatistics, School of Life Science and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
| | - Qin Cai
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200040, China.
- Key Laboratory of Embryo Molecular Biology, Ministry of Health & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai 200040, China.
| | - Xiuli Gong
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200040, China.
- Key Laboratory of Embryo Molecular Biology, Ministry of Health & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai 200040, China.
| | - Georgi Z Genchev
- SJTU-Yale Joint Center for Biostatistics, School of Life Science and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
| | - Hui Lu
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200040, China.
- Key Laboratory of Embryo Molecular Biology, Ministry of Health & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai 200040, China.
- SJTU-Yale Joint Center for Biostatistics, School of Life Science and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
| | - Fanyi Zeng
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200040, China.
- Department of Histo-Embryology, Genetics and Developmental Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
- Key Laboratory of Embryo Molecular Biology, Ministry of Health & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai 200040, China.
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5
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Liu SH, Yu J, Sanchez R, Liu X, Heidt D, Willey J, Nemunaitis J, Brunicardi FC. A novel synthetic human insulin super promoter for targeting PDX-1-expressing pancreatic cancer. Cancer Lett 2018; 418:75-83. [PMID: 29309817 DOI: 10.1016/j.canlet.2018.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 12/19/2017] [Accepted: 01/03/2018] [Indexed: 02/07/2023]
Abstract
Our previous studies have shown that a rat insulin promoter II fragment (RIP) was used to effectively target pancreatic adenocarcinoma (PDAC) and insulinoma that over-express pancreatic and duodenal homeobox-1 (PDX-1). To enhance the activity and specificity of the human insulin promoter, we engineered a synthetic human insulin super-promoter (SHIP). Reporter assay demonstrated that SHIP1 was the most powerful promoter among all of the SHIPs and had far greater activity than the endogenous human insulin promoters and RIP in PDAC expressing PDX-1. Over-expression, knockdown and competitive inhibition of PDX-1 expression assay proved that PDX-1 is a critical transcript factor to regulate the activity of SHIP1. SHIP1-driven viral thymidine kinase followed by ganciclovir (SHIP1-TK/GCV) resulted in cytotoxicity to PDAC cells in vitro. Systemic delivery of SHIP1-TK/GCV in PDAC xenograft mice significantly suppressed PANC-1 tumor growth in vivo greater than RIP-TK/GCV and CMV-TK/GCV controls (p < .05). These preclinical data suggest that SHIP1 is a powerful novel promoter that can be used to target human PDAC expressing PDX-1 in clinical trials. Furthermore, this novel strategy of engineering synthetic super-promoters could be used for other cancer targets.
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Affiliation(s)
- Shi-He Liu
- Department of Surgery, University of Toledo College of Medicine & Life Sciences, Toledo OH, USA
| | - Juehua Yu
- Department of Surgery, University of California at Los Angeles, CA, USA
| | - Robbi Sanchez
- Department of Surgery, University of California at Los Angeles, CA, USA
| | - Xiaochen Liu
- Department of Surgery, University of Toledo College of Medicine & Life Sciences, Toledo OH, USA
| | - David Heidt
- Department of Surgery, University of Toledo College of Medicine & Life Sciences, Toledo OH, USA
| | - James Willey
- Department of Medicine, University of Toledo College of Medicine & Life Sciences, Toledo OH, USA
| | - John Nemunaitis
- Department of Medicine, University of Toledo College of Medicine & Life Sciences, Toledo OH, USA
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6
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Wang Y, Luo F, Yang J, Zhao C, Chu Y. New Chimeric Antigen Receptor Design for Solid Tumors. Front Immunol 2017; 8:1934. [PMID: 29312360 PMCID: PMC5744429 DOI: 10.3389/fimmu.2017.01934] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 12/15/2017] [Indexed: 12/11/2022] Open
Abstract
In recent years, chimeric antigen receptor (CAR) T-cell therapy has become popular in immunotherapy, particularly after its tremendous success in the treatment of lineage-restricted hematologic cancers. However, the application of CAR T-cell therapy for solid tumors has not reached its full potential because of the lack of specific tumor antigens and inhibitory factors in suppressive tumor microenvironment (TME) (e.g., programmed death ligand-1, myeloid-derived suppressor cells, and transforming growth factor-β). In this review, we include some limitations in CAR design, such as tumor heterogeneity, indefinite spatial distance between CAR T-cell and its target cell, and suppressive TME. We also summarize some new approaches to overcome these hurdles, including targeting neoantigens and/or multiple antigens at once and depleting some inhibitory factors.
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Affiliation(s)
- Yuedi Wang
- Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, China.,Biotherapy Research Center, Fudan University, Shanghai, China
| | - Feifei Luo
- Biotherapy Research Center, Fudan University, Shanghai, China.,Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Jiao Yang
- Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, China.,Biotherapy Research Center, Fudan University, Shanghai, China
| | - Chujun Zhao
- Northfield Mount Hermon School, Mount Hermon, MA, United States
| | - Yiwei Chu
- Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, China.,Biotherapy Research Center, Fudan University, Shanghai, China
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