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Cai X, Dou R, Guo C, Tang J, Li X, Chen J, Zhang J. Cationic Polymers as Transfection Reagents for Nucleic Acid Delivery. Pharmaceutics 2023; 15:pharmaceutics15051502. [PMID: 37242744 DOI: 10.3390/pharmaceutics15051502] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/09/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
Nucleic acid therapy can achieve lasting and even curative effects through gene augmentation, gene suppression, and genome editing. However, it is difficult for naked nucleic acid molecules to enter cells. As a result, the key to nucleic acid therapy is the introduction of nucleic acid molecules into cells. Cationic polymers are non-viral nucleic acid delivery systems with positively charged groups on their molecules that concentrate nucleic acid molecules to form nanoparticles, which help nucleic acids cross barriers to express proteins in cells or inhibit target gene expression. Cationic polymers are easy to synthesize, modify, and structurally control, making them a promising class of nucleic acid delivery systems. In this manuscript, we describe several representative cationic polymers, especially biodegradable cationic polymers, and provide an outlook on cationic polymers as nucleic acid delivery vehicles.
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Affiliation(s)
- Xiaomeng Cai
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Multi-Disciplinary Research Division, Institute of High Energy Physics and University of Chinese Academy of Sciences (UCAS), Chinese Academy of Sciences (CAS), Beijing 100049, China
| | - Rui Dou
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Multi-Disciplinary Research Division, Institute of High Energy Physics and University of Chinese Academy of Sciences (UCAS), Chinese Academy of Sciences (CAS), Beijing 100049, China
| | - Chen Guo
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Multi-Disciplinary Research Division, Institute of High Energy Physics and University of Chinese Academy of Sciences (UCAS), Chinese Academy of Sciences (CAS), Beijing 100049, China
| | - Jiaruo Tang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Multi-Disciplinary Research Division, Institute of High Energy Physics and University of Chinese Academy of Sciences (UCAS), Chinese Academy of Sciences (CAS), Beijing 100049, China
| | - Xiajuan Li
- Beijing Institute of Genomics, Chinese Academy of Sciences (CAS), China National Center for Bioinformation, Beijing 100101, China
| | - Jun Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Multi-Disciplinary Research Division, Institute of High Energy Physics and University of Chinese Academy of Sciences (UCAS), Chinese Academy of Sciences (CAS), Beijing 100049, China
| | - Jiayu Zhang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Multi-Disciplinary Research Division, Institute of High Energy Physics and University of Chinese Academy of Sciences (UCAS), Chinese Academy of Sciences (CAS), Beijing 100049, China
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Wang Q, Zhu G, Lin C, Lin P, Chen H, He R, Huang Y, Yang S, Ye J. Vimentin affects colorectal cancer proliferation, invasion, and migration via regulated by activator protein 1. J Cell Physiol 2021; 236:7591-7604. [PMID: 34041752 DOI: 10.1002/jcp.30402] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 04/09/2021] [Accepted: 04/15/2021] [Indexed: 11/08/2022]
Abstract
Uncontrolled recurrence and metastasis are important reasons for the high mortality rate of malignant tumors. Vimentin is positively correlated with the degree of malignancy of cancer cells. Vimentin is also highly expressed in colorectal cancer (CRC) cells and plays a critical role in the metastasis and prognosis of CRC. However, the molecular mechanism of vimentin in the progression of CRC is incompletely understood. Therefore, the most active regions (nucleotides: 785-1085 nt) of the vimentin promoter in CRC were identified using luciferase experiments. By transcription factor sequence search and mutation analysis, the activator protein 1 (AP-1) binding site in the region of 785-1085 nt was confirmed. The vimentin promoter activity was enhanced by overexpression of AP-1. The electrophoretic mobility shift assay and chromatin immunoprecipitation assay showed that the binding site was recognized by AP-1. By cell proliferation assay, colony-forming assay, scratch-wound assay, cell migration assay, and cell invasion assay, we demonstrated that the AP-1 overexpression increased CRC cell proliferation, migration, and invasion. However, when vimentin was knocked down by vimentin small hairpin RNA in the CRC cell of AP-1 overexpression, this trend disappeared. Animal experiments and immunohistochemistry showed that AP-1 promoted tumor growth by regulating the vimentin gene. In summary, AP-1 affected metastasis, invasion of CRC cells in vitro, and tumor growth in vivo by activating the vimentin promoter. This study might provide new insights into the molecular mechanisms of the development of CRC and provide potential therapeutic targets for CRC.
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Affiliation(s)
- Qin Wang
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China
| | - Guangwei Zhu
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China
| | - Chunlin Lin
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China
| | - Penghang Lin
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China
| | - Hui Chen
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China
| | - Ruofan He
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China
| | - Yongjian Huang
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Shugang Yang
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Jianxin Ye
- Department of Gastrointestinal Surgery 2 Section, Fujian Abdominal Surgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China
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Xue J, Li S, Shi P, Chen M, Yu S, Hong S, Li Y, Liu R, Xiao H. The ETS Inhibitor YK-4-279 Suppresses Thyroid Cancer Progression Independent of TERT Promoter Mutations. Front Oncol 2021; 11:649323. [PMID: 34221969 PMCID: PMC8242932 DOI: 10.3389/fonc.2021.649323] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 03/01/2021] [Indexed: 12/24/2022] Open
Abstract
Hotspot mutations in the core promoter region of the telomerase reverse transcriptase (TERT) gene have been well established to associate with aggressive clinical characteristics, radioiodine refractory, tumor recurrence, and mortality in thyroid cancer. Several E-twenty-six (ETS) transcription factors were reported to selectively bound to the mutant TERT promoter and activated TERT expression. In this study we aimed to investigate whether TERT promoter mutations confer sensitivity to ETS inhibitor YK-4-279 in thyroid cancer cells and whether this inhibitor could be served as a potential therapeutic agent for thyroid cancer. In vitro assays showed that YK-4-279 treatment sharply suppressed cell viability, colony formation, migration, and invasion, as well as induced cell cycle arrest and apoptosis in a panel of thyroid cancer cells. The cell viability after YK-4-279 treatment was similar between cell lines harboring mutant and wild-type TERT promoters. Furthermore, YK-4-279 treatment reduced both luciferase activity and mRNA expression of TERT independent of TERT promoter mutation status. Data from RNA-seq further revealed that YK-4-279 significantly affected biological processes including DNA replication and cell cycle. Reduced DNA helicase activity and decreased expression of several helicase genes were observed after YK-4-279 treatment. Moreover, YK-4-279 significantly inhibited tumor growth and induced apoptosis in a xenograft mice model. Thus, ETS inhibitor YK-4-279 suppressed TERT expression and conferred anti-tumor activity in a TERT promoter mutation-independent manner, and it could be a potential agent for the treatment of advanced thyroid cancers.
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Affiliation(s)
- Junyu Xue
- Department of Endocrinology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shiyong Li
- Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Peijie Shi
- Department of Endocrinology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Mengke Chen
- Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shuang Yu
- Department of Endocrinology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shubin Hong
- Department of Endocrinology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yanbing Li
- Department of Endocrinology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Rengyun Liu
- Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Haipeng Xiao
- Department of Endocrinology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Hamada H, Goto Y, Arakawa J, Murayama E, Ogawa Y, Konno M, Oyama T, Asai M, Sato A, Tanuma SI, Uchiumi F. Characterization of the human E2F4 promoter region and its response to 12-O-tetradecanoylphorbol-13-acetate. J Biochem 2019; 166:363-373. [PMID: 31199460 DOI: 10.1093/jb/mvz047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 06/11/2019] [Indexed: 12/23/2022] Open
Abstract
The E2F transcription factors (TFs), which control the progression of the cell cycle in response to DNA-damage and various stresses, are known to interact with a tumour suppressor, Retinoblastoma 1 (RB1). We previously showed that the response of the human RB1 promoter to a 12-O-tetradecanoylphorbol-13-acetate (TPA) in HL-60 cells is mediated by a duplicated GGAA motif, which is also present in the 5'-upstream of the E2F family genes. The motifs are especially rich in the 5'-upstream of the E2F4 gene. In the present study, we constructed luciferase (Luc) expression vectors containing a 466 bp of the 5'-upstream of the human E2F4 gene. The transfection of this plasmid and deletion/mutation-introduced derivatives into HL-60 cells and a Luc reporter assay showed that duplicated and triplicated GGAA (TTCC) motifs in the E2F4 promoter respond to TPA. As expected, electrophoretic mobility shift assay indicated that SPI1 (PU.1) binds to the GGAA motif-containing element. A quantitative RT-PCR and western blotting showed that the E2F4 transcripts and its encoding proteins accumulate during the differentiation of HL-60 into macrophage-like cells. In contrast, the expression of the E2F1 gene and the protein, which possibly acts as a cell cycle accelerator, was greatly diminished.
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Affiliation(s)
- Hiroshi Hamada
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Yuta Goto
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Jun Arakawa
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Erisa Murayama
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Yui Ogawa
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Midori Konno
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Takahiro Oyama
- Hinoki Shinyaku Co., Ltd, 9-6 Nibancho, Chiyoda-ku, Tokyo, Japan
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Masashi Asai
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Akira Sato
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Sei-Ichi Tanuma
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
- Genomic Medical Science, Research Institute of Science and Technology, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
| | - Fumiaki Uchiumi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken, Japan
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Hamada H, Yamamura M, Ohi H, Kobayashi Y, Niwa K, Oyama T, Mano Y, Asai M, Tanuma SI, Uchiumi F. Characterization of the human zinc finger nfx‑1‑type containing 1 encoding ZNFX1 gene and its response to 12‑O‑tetradecanoyl‑13‑acetate in HL‑60 cells. Int J Oncol 2019; 55:896-904. [PMID: 31432148 DOI: 10.3892/ijo.2019.4860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/19/2019] [Indexed: 11/06/2022] Open
Abstract
Human promyelocytic HL‑60 cells can be differentiated into macrophage‑like cells by treatment with 12‑O‑tetra decanoylphorbol‑13‑acetate (TPA). Certain 5' upstream regions of the zinc finger protein (ZNF)‑encoding genes contain duplicated GGAA motifs, which are frequently found in the TPA‑responding gene promoter regions. To examine transcriptional responses to TPA, 5'flanking regions of human zinc finger CCCH‑type containing, antiviral, ZNF252, ZNF343, ZNF555, ZNF782 and zinc finger nfx‑1‑type containing 1 (ZNFX1) genes were isolated by polymerase chain reaction (PCR) and ligated into a multiple‑cloning site of the pGL4.10[luc2] vector. Transient transfection and a luciferase assay revealed that the ZNFX1 promoter most prominently responded to the TPA treatment. Deletion and point mutation experiments indicated that the duplicated GGAA motif in the 100‑bp region positively responded to TPA. In addition, reverse transcription‑quantitative PCR and western blotting showed that the mRNA and protein of ZNFX1 accumulate during the differentiation of HL‑60 cells. These results indicated that expression of the TPA‑inducible ZNFX1 gene, which belongs to the group of interferon‑responsive genes, is regulated by the cis‑action of the duplicated GGAA motif.
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Affiliation(s)
- Hiroshi Hamada
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Mayu Yamamura
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Hiroto Ohi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Yota Kobayashi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Kuniyoshi Niwa
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Takahiro Oyama
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Yasunari Mano
- Department of Clinical Drug Informatics, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Masashi Asai
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Sei-Ichi Tanuma
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Fumiaki Uchiumi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
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Characterization of the 5'-flanking region of the human DNA helicase B (HELB) gene and its response to trans-Resveratrol. Sci Rep 2016; 6:24510. [PMID: 27079536 PMCID: PMC4832242 DOI: 10.1038/srep24510] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 03/30/2016] [Indexed: 12/17/2022] Open
Abstract
Human DNA helicase B (HELB/HDHB) regulates DNA replication through association with human DNA polymerase α-primase. In the present study, an 866-base pair (bp) of the 5′-flanking region of the human HELB gene-containing Luciferase (Luc) reporter plasmid, pHDHB-Luc was transfected into various cell lines and Luc activity was analyzed. Deletion analyses revealed that a 121-bp containing the major transcription start site (TSS) was essential for the basal promoter activity in all tested cells. TF-SEARCH analysis indicated that GC-box/Sp1 and duplicated GGAA-motifs containing putative STAT-x and c-ETS binding sites are located close to the TSS. Furthermore, chromatin immunoprecipitation (ChIP) analysis showed that PU.1 and Sp1 bind to the 121-bp region. Reverse transcriptase-polymerase chain reaction (RT-PCR) and western blot analyses showed the HELB gene and protein expression was up-regulated by trans-Resveratrol (Rsv) treatment in HeLa S3 cells. Moreover, transfection experiment indicated that mutations on the GC-boxes and the duplicated GGAA-motif greatly reduced promoter activity and the response to Rsv in HeLa S3 cells. These results suggest that Rsv, which is a natural compound that has been found to elongate the lifespan of various organisms, regulates HELB promoter activity through co-operation of the GC-boxes and the duplicated GGAA-motif in the 121-bp.
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Uchiumi F, Shoji K, Sasaki Y, Sasaki M, Sasaki Y, Oyama T, Sugisawa K, Tanuma SI. Characterization of the 5'-flanking region of the human TP53 gene and its response to the natural compound, Resveratrol. J Biochem 2016; 159:437-47. [PMID: 26684585 PMCID: PMC4885937 DOI: 10.1093/jb/mvv126] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 11/02/2015] [Indexed: 01/19/2023] Open
Abstract
Tumour suppressor p53, which is encoded by theTP53gene, is widely known to play an important role in response to DNA damage and various stresses. It has recently been reported that p53 regulates glucose metabolism and that an increase in p53 protein level is induced after serum deprivation or treatments with a natural compound,trans-Resveratrol (Rsv). In this study, we constructed a Luciferase expression vector, pGL4-TP53-551, containing 551 bp of the 5'-upstream region of the humanTP53gene, which was then transfected into HeLa S3 cells. A Luciferase assay showed that Rsv treatment increased the promoter activity of theTP53gene in comparison to that ofPIF1 Detailed deletion and mutation analyses revealed that Nkx-2.5 and E2F-binding elements are required in addition to duplicated GGAA (TTCC), for the regulation ofTP53promoter activity. In this study, it is suggested that the transient induction ofTP53gene expression by Rsv treatment might be partly involved in its anti-aging effect through maintenance of chromosomal DNAs.
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Affiliation(s)
- Fumiaki Uchiumi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences; Research Center for RNA Science, RIST;
| | - Koichiro Shoji
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences
| | - Yuki Sasaki
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences
| | - Moe Sasaki
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences
| | - Yamato Sasaki
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences
| | - Takahiro Oyama
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences
| | - Kyoko Sugisawa
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences
| | - Sei-ichi Tanuma
- Research Center for RNA Science, RIST; Biochemistry, Faculty of Pharmaceutical Sciences; and Drug Creation Frontier Research Center, RIST, Tokyo University of Science, Noda-shi, Chiba-ken 278-8510, Japan
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Larsen S, Kawamoto S, Tanuma SI, Uchiumi F. The hematopoietic regulator, ELF-1, enhances the transcriptional response to Interferon-β of the OAS1 anti-viral gene. Sci Rep 2015; 5:17497. [PMID: 26643049 PMCID: PMC4672336 DOI: 10.1038/srep17497] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 10/30/2015] [Indexed: 12/11/2022] Open
Abstract
Interferon (IFN) therapy is effective in treating cancers, haematological and virus induced diseases. The classical Jak/Stat pathway of IFN signal transduction leading to changes in transcriptional activity is well established but alone does not explain the whole spectrum of cellular responses to IFN. Gene promoters contain cis-acting sequences that allow precise and contextual binding of transcription factors, which control gene expression. Using the transcriptional response to IFN as a starting point we report a high frequency of tandem GGAA motifs in the proximal promoters of Interferon stimulated genes, suggesting a key regulatory action. Utilizing the well-characterized anti-viral gene, OAS1, as an example Interferon stimulated gene promoter containing such a duplicated GGAA motif, we have demonstrated a regulatory role of this promoter in response to IFN by mutation analysis. Furthermore, we identified ELF-1 as a direct binding factor at this motif. Additionally, recruitment of RB1 and SP1 factors to the promoter following IFN stimulation is shown. ELF-1 overexpression enhanced and knockdown of ELF-1 inhibited full activation of OAS1 by IFN stimulation. Collectively, ELF-1 binds an important duplicated GGAA cis-acting element at the OAS1 promoter and in cooperation with RB1 and SP1 recruitment contributes to regulation in response to IFN stimulation.
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Affiliation(s)
- Steven Larsen
- Research Center for RNA Science, RIST, Tokyo University of Science, Noda, Chiba, Japan.,Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - Shota Kawamoto
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - Sei-ichi Tanuma
- Research Center for RNA Science, RIST, Tokyo University of Science, Noda, Chiba, Japan.,Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - Fumiaki Uchiumi
- Research Center for RNA Science, RIST, Tokyo University of Science, Noda, Chiba, Japan.,Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Chiba, Japan
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Uchiumi F, Watanabe T, Ohta R, Abe H, Tanuma SI. PARP1 gene expression is downregulated by knockdown of PARG gene. Oncol Rep 2013; 29:1683-8. [PMID: 23467693 PMCID: PMC3658849 DOI: 10.3892/or.2013.2321] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Accepted: 01/29/2013] [Indexed: 11/05/2022] Open
Abstract
Poly(ADP-ribosyl)ation is a modification of nuclear proteins that regulates DNA replication, repair and transcription. In order to investigate the biological effects of degradation of poly(ADP-ribose), knockdown of the poly(ADP-ribose) glycohydrolase (PARG) gene was performed by introducing a short interfering RNA (siRNA)-pool into HeLa S3 cells. Notably, poly(ADP-ribosyl)ated proteins did not accumulate in the cells. Western blotting, quantitative RT-PCR analysis and a transient transfection assay revealed that poly(ADP-ribose) polymerase 1 (PARP1) gene/protein expression and its promoter activity were reduced in the PARG knockdown cells. These results suggest that the amount of poly(ADP-ribose) in a cell is regulated under the control of PARP1/PARG gene expression balance. Furthermore, in this study, we showed that PARG-siRNA enhanced cell death induced by staurosporine (STS). Thus, we propose a PARG-siRNA utilizing gene-therapy for cancer treatment.
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Affiliation(s)
- Fumiaki Uchiumi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Chiba-ken 278-8510, Japan.
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Uchiumi F, Fujikawa M, Miyazaki S, Tanuma SI. Implication of bidirectional promoters containing duplicated GGAA motifs of mitochondrial function-associated genes. AIMS MOLECULAR SCIENCE 2013. [DOI: 10.3934/molsci.2013.1.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Uchiumi F, Miyazaki S, Tanuma SI. [Biological functions of the duplicated GGAA-motifs in various human promoter regions]. YAKUGAKU ZASSHI 2011; 131:1787-800. [PMID: 22129877 DOI: 10.1248/yakushi.131.1787] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Transcription is one of the most fundamental cellular functions and is an enzyme-complex mediated reaction that converts DNA sequences into mRNA. TATA-box is known to be an important motif for transcription. However, there are majority of promoters that have no TATA-box. They are called as TATA-less promoters and possess other elements that determine the transcription start site (TSS) of the genes. Multiple protein factors including ETS family proteins are known to recognize and bind to the GGAA containing sequences. In addition, it has been reported that the ETS binding motifs play important roles in regulation of various promoters. Here, we propose that the duplication and multiplication of the GGAA motifs are responsible for the initiation of transcription from TATA-less promoters.
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Affiliation(s)
- Fumiaki Uchiumi
- Department of Gene Regulation, Tokyo University of Science, Noda, Chiba, Japan.
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The possible functions of duplicated ets (GGAA) motifs located near transcription start sites of various human genes. Cell Mol Life Sci 2011; 68:2039-51. [PMID: 21461879 PMCID: PMC3101357 DOI: 10.1007/s00018-011-0674-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 02/28/2011] [Accepted: 03/17/2011] [Indexed: 12/19/2022]
Abstract
Transcription is one of the most fundamental nuclear functions and is an enzyme complex-mediated reaction that converts DNA sequences into mRNA. Analyzing DNA sequences of 5′-flanking regions of several human genes that respond to 12-O-tetradecanoyl-phorbol-13-acetate (TPA) in HL-60 cells, we have identified that the ets (GGAA) motifs are duplicated, overlapped, or clustered within a 500-bp distance from the most 5′-upstream region of the cDNA. Multiple protein factors including Ets family proteins are known to recognize and bind to the GGAA containing sequences. In addition, it has been reported that the ets motifs play important roles in regulation of various promoters. Here, we propose a molecular mechanism, defined by the presence of duplication and multiplication of the GGAA motifs, that is responsible for the initiation of transcription of several genes and for the recruitment of binding proteins to the transcription start site (TSS) of TATA-less promoters.
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Uchiumi F, Enokida K, Shiraishi T, Masumi A, Tanuma SI. Characterization of the promoter region of the human IGHMBP2 (Smubp-2) gene and its response to TPA in HL-60 cells. Gene 2010; 463:8-17. [PMID: 20441787 DOI: 10.1016/j.gene.2010.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 04/13/2010] [Accepted: 04/28/2010] [Indexed: 11/28/2022]
Abstract
Immunoglobulin mu-binding protein 2 (IGHMBP2/Smubp-2) is a helicase motif-containing DNA-binding protein that has been suggested to regulate various nuclear functions. Recent studies indicated that mutations in the IGHMBP2 gene are responsible for spinal muscular atrophy with respiratory distress type I (SMARD1). However, the mechanism of regulation of IGHMBP2 gene expression remains unclear. In the present study, a 2.0-kb fragment of the 5'-flanking (promoter) region of the human IGHMBP2 gene was isolated from the HL-60 genome by PCR and ligated into a luciferase (Luc) expression vector, pGL3, to generate the pSmu-Luc plasmid. Deletion analyses revealed that a 108-bp region is essential for basal promoter activity with a response to TPA in HL-60 cells. TF-SEARCH analysis showed that overlapping ets (GGAA) motifs are located upstream of the transcription start sites. Chromatin immunoprecipitation (ChIP) assay, electropheretic mobility shift assay (EMSA) and competition analyses indicated that PU.1 (Spi-1) recognizes and binds to the duplicated ets motifs in this 108-bp region. Moreover, co-transfection of the PU.1 expression plasmid and pSmu-Luc into HL-60 cells revealed that PU.1 modulates TPA-induced IGHMBP2 promoter activity. Taken together, these observations suggest that the duplicated GGAA motifs are essential for the IGHMBP2 promoter activity and its positive response to TPA in HL-60 cells.
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Affiliation(s)
- Fumiaki Uchiumi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 270-8510 Japan.
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