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Suzuki T, Wakao Y, Goda T, Kamiya H. Conventional plasmid DNAs with a CpG-containing backbone achieve durable transgene expression in mouse liver. J Gene Med 2020; 22:e3138. [PMID: 31696985 DOI: 10.1002/jgm.3138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/23/2019] [Accepted: 10/28/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Durable transgene expression from plasmid DNAs is the key to gene therapy with non-viral vectors. A comparison of the durability of transgene expression from plasmid DNAs with the CpG-free and -containing backbones is important. METHODS We constructed plasmid DNAs with the CpG-containing backbone, various transcription regulatory sequences with and without CpG, and the gene encoding Gaussia princeps luciferase, which is apparently non-immunogenic. The tail vein hydrodynamics-based method was used for plasmid injection into mice, and the luciferase activity in serum was tracked for 28 days. RESULTS The plasmid DNAs containing the albumin promoter [with or without the cytomegalovirus (CMV) enhancer] and the elongation factor (EF)1α promoter plus the CMV enhancer exhibited long-term luciferase expression. The expression from the plasmid DNA containing the albumin promoter without the CMV enhancer was maintained for at least 24 weeks and was similar to that from the corresponding CpG-free plasmid DNA. CONCLUSIONS The results obtained in the present study suggest that special sequences/systems are unnecessary for durable transgene expression from plasmid DNAs when the proper transcription regulatory sequences are used.
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Affiliation(s)
- Tetsuya Suzuki
- Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yusuke Wakao
- Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takuya Goda
- Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hiroyuki Kamiya
- Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Suzuki T, Wakao Y, Watanabe T, Hori M, Ikeda Y, Tsuchiya H, Kogure K, Harada-Shiba M, Fujimuro M, Kamiya H. No enhancing effects of plasmid-specific histone acetyltransferase recruitment system on transgene expression in vivo. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 38:942-949. [PMID: 31299884 DOI: 10.1080/15257770.2019.1638514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Altered levels of histone acetylation are associated with changes in chromosomal gene expression. Thus, the specific acetylation of histones bound to plasmid DNA might increase transgene expression. Previously, the expression of the histone acetyltransferase domain of CREB-binding protein fused to the sequence-dependent DNA binding domain of GAL4 (GAL4-HAT) successfully improved reporter gene expression in cultured cells [J. Biosci. Bioengng. 123, 277-280 (2017)]. In this study, the same approach was applied for transgene expression in mice. The activator and reporter plasmid DNAs bearing the genes for GAL4-HAT and Gaussia princeps luciferase, respectively, were co-administered into the mouse liver by hydrodynamics-based tail vein injection, and the Gaussia luciferase activity in serum was measured for two weeks. Unexpectedly, the co-injection of the GAL4-HAT and luciferase plasmid DNAs seemed to decrease, rather than increase, luciferase expression. Moreover, the co-injection apparently reduced the amount of luciferase DNA in the liver. These results indicated that this system is ineffective in vivo and suggested the exclusion of hepatic cells expressing GAL4-HAT.
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Affiliation(s)
- Tetsuya Suzuki
- Graduate School of Biomedical and Health Sciences , Hiroshima University , Hiroshima , Japan
| | - Yusuke Wakao
- Graduate School of Biomedical and Health Sciences , Hiroshima University , Hiroshima , Japan
| | - Tadashi Watanabe
- Department of Cell Biology , Kyoto Pharmaceutical University , Kyoto , Japan
| | - Mika Hori
- Department of Molecular Innovation in Lipidology , National Cerebral and Cardiovascular Center Research Institute , Suita , Osaka , Japan
| | - Yoshito Ikeda
- Department of Biophysical Chemistry , Kyoto Pharmaceutical University , Kyoto , Japan.,Laboratory of Medicinal Cell Biology, Kobe Pharmaceutical University , Kobe , Japan
| | - Hiroyuki Tsuchiya
- Department of Biophysical Chemistry , Kyoto Pharmaceutical University , Kyoto , Japan.,Graduate School of Medicine , Tottori University , Yonago , Tottori , Japan
| | - Kentaro Kogure
- Department of Biophysical Chemistry , Kyoto Pharmaceutical University , Kyoto , Japan.,Graduate School of Biomedical Sciences , Tokushima University , Tokushima , Japan
| | - Mariko Harada-Shiba
- Department of Molecular Innovation in Lipidology , National Cerebral and Cardiovascular Center Research Institute , Suita , Osaka , Japan
| | - Masahiro Fujimuro
- Department of Cell Biology , Kyoto Pharmaceutical University , Kyoto , Japan
| | - Hiroyuki Kamiya
- Graduate School of Biomedical and Health Sciences , Hiroshima University , Hiroshima , Japan
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Zhang C, Zhang G, Liu D. Histone deacetylase inhibitors reactivate silenced transgene in vivo. Gene Ther 2018; 26:75-85. [DOI: 10.1038/s41434-018-0053-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 11/18/2018] [Accepted: 11/26/2018] [Indexed: 11/09/2022]
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Zimmerman D, Patel K, Hall M, Elmer J. Enhancement of transgene expression by nuclear transcription factor Y and CCCTC-binding factor. Biotechnol Prog 2018; 34:1581-1588. [PMID: 30294957 DOI: 10.1002/btpr.2712] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 08/03/2018] [Accepted: 08/17/2018] [Indexed: 12/23/2022]
Abstract
If a transgene is effectively delivered to a cell, its expression may still be limited by epigenetic mechanisms that silence the transgene. Indeed, once the transgene reaches the nucleus, it may be bound by histone proteins and condensed into heterochromatin or associated with repressor proteins that block transcription. In this study, we sought to enhance transgene expression by adding binding motifs for several different epigenetic enzymes either upstream or downstream of two promoters (CMV and EF1α). Screening these plasmids revealed that luciferase expression was enhanced 10-fold (10.4 ± 5.8) by the addition of a CCAAT box just upstream of the EF1α promoter to recruit nuclear transcription factor Y (NF-Y), while inserting a CCCTC-binding factor (CTCF) motif downstream of the EF1α promoter enhanced expression at least 14-fold (14.03 ± 6.54). ChIP assays confirmed that NF-Y and CTCF bound to the motifs that were added to each plasmid, but the presence of NF-Y and CTCF did not significantly affect the levels of histone acetylation (H3K9ac) or methylation (H3K9me3). Overall, these results show that transgene expression from the EF1α promoter can be significantly increased with motifs that recruit NF-Y or CTCF. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 34:1581-1588, 2018.
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Affiliation(s)
- Devon Zimmerman
- Dept. of Chemical Engineering, Villanova University, Villanova, PA, 19085
| | - Krupa Patel
- Dept. of Chemical Engineering, Villanova University, Villanova, PA, 19085
| | - Matthew Hall
- Dept. of Chemical Engineering, Villanova University, Villanova, PA, 19085
| | - Jacob Elmer
- Dept. of Chemical Engineering, Villanova University, Villanova, PA, 19085
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Suzuki T, Goda T, Kamiya H. Durable Transgene Expression Driven by CpG-Free and -Containing Promoters in Plasmid DNA with CpG-Free Backbone. Biol Pharm Bull 2018; 41:1489-1493. [DOI: 10.1248/bpb.b18-00342] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Tetsuya Suzuki
- Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Takuya Goda
- Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Hiroyuki Kamiya
- Graduate School of Biomedical and Health Sciences, Hiroshima University
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