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Nakao J, Mikame Y, Eshima H, Yamamoto T, Dohno C, Wada T, Yamayoshi A. Unique Crosslinking Properties of Psoralen-Conjugated Oligonucleotides Developed by Novel Psoralen N-Hydroxysuccinimide Esters. Chembiochem 2023; 24:e202200789. [PMID: 36896628 DOI: 10.1002/cbic.202200789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 03/07/2023] [Accepted: 03/10/2023] [Indexed: 03/11/2023]
Abstract
Psoralens and their derivatives, such as trioxsalen, have unique crosslinking features to DNA. However, psoralen monomers do not have sequence-specific crosslinking ability with the target DNA. With the development of psoralen-conjugated oligonucleotides (Ps-Oligos), sequence-specific crosslinking with target DNA has become achievable, thereby expanding the application of psoralen-conjugated molecules in gene transcription inhibition, gene knockout, and targeted recombination by genome editing. In this study, we developed two novel psoralen N-hydroxysuccinimide (NHS) esters that allow the introduction of psoralens into any amino-modified oligonucleotides. Quantitative evaluation of the photo-crosslinking efficiencies of the Ps-Oligos to target single-stranded DNAs revealed that the crosslinking selectivity to 5-mC is the unique feature of trioxsalen. We found that the introduction of an oligonucleotide via a linker at the C-5 position of psoralen can promote favorable crosslinking to target double-stranded DNA. We believe our findings are essential information for the development of Ps-Oligos as novel gene regulation tools.
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Affiliation(s)
- Juki Nakao
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, Nagasaki, 852-8521, Japan
| | - Yu Mikame
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, Nagasaki, 852-8521, Japan
| | - Honoka Eshima
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, Nagasaki, 852-8521, Japan
| | - Tsuyoshi Yamamoto
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, Nagasaki, 852-8521, Japan
| | - Chikara Dohno
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Takehiko Wada
- IMRAM (Institute of Multidisciplinary Research for Advanced Materials), Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Asako Yamayoshi
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, Nagasaki, 852-8521, Japan
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2
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Lechner VM, Nappi M, Deneny PJ, Folliet S, Chu JCK, Gaunt MJ. Visible-Light-Mediated Modification and Manipulation of Biomacromolecules. Chem Rev 2021; 122:1752-1829. [PMID: 34546740 DOI: 10.1021/acs.chemrev.1c00357] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chemically modified biomacromolecules-i.e., proteins, nucleic acids, glycans, and lipids-have become crucial tools in chemical biology. They are extensively used not only to elucidate cellular processes but also in industrial applications, particularly in the context of biopharmaceuticals. In order to enable maximum scope for optimization, it is pivotal to have a diverse array of biomacromolecule modification methods at one's disposal. Chemistry has driven many significant advances in this area, and especially recently, numerous novel visible-light-induced photochemical approaches have emerged. In these reactions, light serves as an external source of energy, enabling access to highly reactive intermediates under exceedingly mild conditions and with exquisite spatiotemporal control. While UV-induced transformations on biomacromolecules date back decades, visible light has the unmistakable advantage of being considerably more biocompatible, and a spectrum of visible-light-driven methods is now available, chiefly for proteins and nucleic acids. This review will discuss modifications of native functional groups (FGs), including functionalization, labeling, and cross-linking techniques as well as the utility of oxidative degradation mediated by photochemically generated reactive oxygen species. Furthermore, transformations at non-native, bioorthogonal FGs on biomacromolecules will be addressed, including photoclick chemistry and DNA-encoded library synthesis as well as methods that allow manipulation of the activity of a biomacromolecule.
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Affiliation(s)
- Vivian M Lechner
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Manuel Nappi
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Patrick J Deneny
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Sarah Folliet
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - John C K Chu
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Matthew J Gaunt
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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3
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Yang Y, Zong Y, Sun Q, Jia Y, Zhao R. White light emitting diode suppresses proliferation and induces apoptosis in hippocampal neuron cells through mitochondrial cytochrome c oxydase-mediated IGF-1 and TNF-α pathways. Free Radic Biol Med 2017; 113:413-423. [PMID: 29106990 DOI: 10.1016/j.freeradbiomed.2017.10.382] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/17/2017] [Accepted: 10/25/2017] [Indexed: 10/18/2022]
Abstract
Light emitting diode (LED) light has been tested to treat traumatic brain injury, neural degenerative diseases and psychiatric disorders. Previous studies indicate that blue LED light affects cell proliferation and apoptosis in photosensitive cells and cancer cells. In this study, we demonstrate that white LED light exposure impaired proliferation and induced apoptosis in HeLa and HT-22 hippocampal neural cells, but not C2C12 cells. Furthermore, the mechanisms underlying the effect of white LED light exposure on HT-22 cells were elucidated. In HeLa and HT-22 cells, white LED light activated mitochondrial cytochrome c oxidase (Cco), in association with enhanced ATP synthase activity and elevated intracellular ATP concentration. Also, reactive oxygen species (ROS) and nitric oxide (NO) production were increased, accompanied by higher calcium concentration and lower mitochondrial membrane potential. HT-22 cells exposed to white LED light for 24h showed reduced viability, with higher apoptotic rate and a cell cycle arrest at G0/G1 phase. Concurrently, the mRNA expression and the concentration of IGF-1 were decreased, while that of TNF-α were increased, in light-exposed cells, which was supported by the luciferase activity of both gene promoters. The down-stream mitogen-activated protein kinase (MAPK), AKT/mTOR pathways were inhibited, in association with an activation of apoptotic caspase 3. N-Acetylcysteine, a ROS scavenger, protected the cells from LED light-induced cellular damage, with rescued cell viability and restored mRNA expression of IGF-1 and TNF-α. Our data demonstrate that white LED light suppresses proliferation and induces apoptosis in hippocampal neuron cells through mitochondrial Cco/ROS-mediated IGF-1 and TNF-α pathways.
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Affiliation(s)
- Yang Yang
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yibo Zong
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Qinwei Sun
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yimin Jia
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Ruqian Zhao
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing 210095, PR China.
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4
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Sugihara Y, Nakata Y, Yamayoshi A, Murakami A, Kobori A. Inhibition Effect of Photoresponsive α-Haloaldehyde-conjugated Oligonucleotides on the Gene Expression in HeLa Cells Stably Expressing GFP. CHEM LETT 2017. [DOI: 10.1246/cl.170298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Yuta Sugihara
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585
| | - Yuki Nakata
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585
| | - Asako Yamayoshi
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502
- The Hakubi Center for Advanced Research, Kyoto University, Yoshida-Ushinomiyacho, Sakyo-ku, Kyoto 606-8501
| | - Akira Murakami
- Kyoto Pharmaceutical University, 1 Misasagi-Shichonocho, Yamashina-ku, Kyoto 607-8412
| | - Akio Kobori
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585
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5
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Sugihara Y, Tatsumi S, Kobori A. Development of Novel Photoresponsive Oligodeoxyribonucleotides with a 2′-O-Diazirine-conjugated Adenosine for DNA Interstrand Crosslinking. CHEM LETT 2017. [DOI: 10.1246/cl.160998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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6
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Sugihara Y, Nakata Y, Yamayoshi A, Murakami A, Kobori A. Cross-Linking Antisense Oligodeoxyribonucleotides with a Photoresponsive α-Chloroaldehyde Moiety for RNA Point Mutations. J Org Chem 2016; 81:981-6. [PMID: 26788869 DOI: 10.1021/acs.joc.5b02573] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Because point mutations in GTPase-coding genes have been reported to be responsible for the transformation of cells, anticancer reagents that react effectively and sequence selectively with target RNAs having a point mutation are highly desired. In this study, we developed novel photo-cross-linking oligodeoxyribonucleotides ((pro)PCA-ODNs) that had a caged α-chloroaldehyde group conjugated to a 2-methylpropanediyl backbone ((pro)PCA) in the middle of the strand. A kinetic study of the deprotection reaction of (pro)PCA-ODN revealed that the bis(2-nitrobenzyl)acetal group was completely deprotected within 1 min. Photo-cross-linking studies of (pro)PCA-ODNs with complementary oligoribonucleotides (ORNs) revealed that (pro)PCA-ODNs reacts efficiently and selectively with the target ORNs that have an adenosine or cytidine residue at a frontal position of the (pro)PCA residue without adverse effects of bases adjacent to the mutation site.
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Affiliation(s)
- Yuta Sugihara
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology , Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yuki Nakata
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology , Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Asako Yamayoshi
- The Hakubi Center for Advanced Research, Kyoto University , Yoshida-ushinomiyacho, Sakyo-ku, Kyoto 606-8501, Japan.,Department of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Akira Murakami
- Kyoto Pharmaceutical University , Misasagi-Shichonocho 1, Yamashina-ku, Kyoto 607-8412, Japan
| | - Akio Kobori
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology , Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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7
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Carrette LLG, Gyssels E, De Laet N, Madder A. Furan oxidation based cross-linking: a new approach for the study and targeting of nucleic acid and protein interactions. Chem Commun (Camb) 2016; 52:1539-54. [PMID: 26679922 DOI: 10.1039/c5cc08766j] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The coming of age story of furan oxidation cross-linking.
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Affiliation(s)
- L. L. G. Carrette
- Organic and Biomimetic Chemistry Research Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | - E. Gyssels
- Organic and Biomimetic Chemistry Research Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | - N. De Laet
- Organic and Biomimetic Chemistry Research Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | - A. Madder
- Organic and Biomimetic Chemistry Research Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Gent
- Belgium
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8
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Kobori A, Yamayoshi A, Murakami A. Synthesis of Oligonucleotides Containing 4,5',8-Trimethylpsoralen at the 2'-O Position and Their Cross-Linking Properties with RNAs. ACTA ACUST UNITED AC 2014; 58:5.15.1-15. [PMID: 25199638 DOI: 10.1002/0471142700.nc0515s58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
4,5',8-Trimethylpsoralen-conjugated oligonucleotides have been used in the study of photo-cross-linking with target oligonucleotides and in the field of the photodynamic therapy. This unit describes synthetic procedures for oligonucleotides using 2'-O-methylphosphoramidite units and an adenosine phosphoramidite unit containing a 4,5',8-trimethylpsoralen derivative attached at the 2' position of an adenosine sugar moiety via an ethoxymethylene linkage. Procedures for obtaining the photo-cross-linking efficiency of 2'-O-methyloligonucleotides containing a 4,5',8-trimethylpsoralen derivative with a target oligonucleotide under UV irradiation conditions are also described, together with the procedure for preparation of (32)P-radiolabeled RNA.
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Affiliation(s)
- Akio Kobori
- Kyoto Institute of Technology, Graduate School of Science and Technology, Department of Biomolecular Engineering, Matsugasaki, Sakyo-ku, Kyoto, Japan
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9
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Yamayoshi A, Matsuyama Y, Kushida M, Kobori A, Murakami A. Novel photodynamic effect of a psoralen-conjugated oligonucleotide for the discrimination of the methylation of cytosine in DNA. Photochem Photobiol 2014; 90:716-22. [PMID: 24372306 DOI: 10.1111/php.12232] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 12/17/2013] [Indexed: 12/11/2022]
Abstract
DNA methylation and demethylation significantly affect the deactivation and activation processes of gene expression significantly. In particular, C-5-methylation of cytosine in the CpG islands is important for the epigenetic modification in genes, which plays a key role in regulating gene expression. The determination of the location and frequency of DNA methylation is important for the elucidation of the mechanisms of cell differentiation and carcinogenesis. Here we designed a psoralen-conjugated oligonucleotide (PS-oligo) for the discrimination of 5-methylcytosine (5-mC) in DNA. The cross-linking behavior of psoralen derivatives with pyrimidine bases, such as thymine, uracil and cytosine has been well discussed, but there are no reports which have examined whether cross-linking efficiency of psoralen with cytosine would be changed with or without C-5 methylation. We found that the cross-linking efficiency of PS-oligo with target-DNA containing 5-mC was greatly increased compared to the case of target-DNA without 5-mC, approximately seven-fold higher. Here we report a new aspect of the photocross-linking behavior of psoralen with 5-mC that is applicable to a simple, sequence-specific and quantitative analysis for the discrimination of 5-mC in DNA, which can be applicable to study the epigenetic behavior of gene expressions.
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Affiliation(s)
- Asako Yamayoshi
- Department of Biomolecular Engineering, Kyoto Institute of Technology, Matsugasaki, Sakuo-ku, Kyoto, Japan
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10
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Sakamoto T, Shigeno A, Ohtaki Y, Fujimoto K. Photo-regulation of constitutive gene expression in living cells by using ultrafast photo-cross-linking oligonucleotides. Biomater Sci 2014; 2:1154-1157. [DOI: 10.1039/c4bm00117f] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We clearly demonstrated that photoreactive AS-ODNs having CNVK act as effective photo-regulators of constitutive GFP gene expression in living cells with only 10 s of 366 nm irradiation.
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Affiliation(s)
- Takashi Sakamoto
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi, Japan
| | - Atsuo Shigeno
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi, Japan
| | - Yuichi Ohtaki
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi, Japan
| | - Kenzo Fujimoto
- School of Materials Science
- Japan Advanced Institute of Science and Technology
- Nomi, Japan
- Research Center for Bio-Architecture
- Japan Advanced Institute of Science and Technology
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11
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Matsuyama Y, Yamayoshi A, Kobori A, Murakami A. Functional regulation of RNA-induced silencing complex by photoreactive oligonucleotides. Bioorg Med Chem 2013; 22:1003-7. [PMID: 24417957 DOI: 10.1016/j.bmc.2013.12.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 12/18/2013] [Accepted: 12/18/2013] [Indexed: 01/07/2023]
Abstract
We developed a novel method for regulation of RISC function by photoreactive oligonucleotides (Ps-Oligo) containing 2'-O-psoralenylmethoxyethyl adenosine (Aps). We observed that inhibitory effects of Ps-Oligos on RISC function were enhanced by UV-irradiation compared with 2'-O-methyl-oligonucleotide without Aps. These results suggest Ps-Oligo inhibited RISC function by cross-linking effect, and we propose that the concept described in this report may be promising and applicable one to regulate the small RNA-mediated post-transcriptional regulation.
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Affiliation(s)
- Yohei Matsuyama
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Asako Yamayoshi
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Akio Kobori
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Akira Murakami
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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12
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Shigeno A, Sakamoto T, Yoshimura Y, Fujimoto K. Quick regulation of mRNA functions by a few seconds of photoirradiation. Org Biomol Chem 2013; 10:7820-5. [PMID: 22918386 DOI: 10.1039/c2ob25883h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3-Cyanovinylcarbazole nucleoside, which effectively photocrosslinks to the pyrimidine base in complementary RNA strands, was incorporated into antisense oligonucleotides, and we evaluated the photoreactivity and the sequence selectivity to mutated K-ras oligoRNAs, as well as the regulation of the function of K-ras mRNA. We demonstrated that the reverse transcription and the translation activity of K-ras mRNA were quickly suppressed by a few seconds of photoirradiation with the addition of the photoresponsive antisense ODN.
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Affiliation(s)
- Atsuo Shigeno
- School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa 923-1292, Japan
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13
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Kobori A, Kohji T, Nagae Y, Yamayoshi A, Murakami A. Synthesis and Crosslinking Activity of 4-N-(4,5′,8-Trimethylpsoralen-4′-ylmethyl)-2′-deoxycytidine-containing Oligodeoxyribonucleotides. CHEM LETT 2012. [DOI: 10.1246/cl.2012.804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Akio Kobori
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology
| | - Tomita Kohji
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology
| | - Yuko Nagae
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology
| | - Asako Yamayoshi
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology
| | - Akira Murakami
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology
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14
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Kobori A, Yamauchi T, Nagae Y, Yamayoshi A, Murakami A. Novel photoresponsive cross-linking oligodeoxyribonucleotides having a caged α-chloroaldehyde. Bioorg Med Chem 2012; 20:5071-6. [PMID: 22871262 DOI: 10.1016/j.bmc.2012.07.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 07/13/2012] [Accepted: 07/13/2012] [Indexed: 01/06/2023]
Abstract
We have developed photoresponsive cross-linking oligodeoxyribonucleotides (ODNs) for sequence-selective interstrand covalent bond formation toward target nucleotides. A phosphoramidite derivative of α-chloroaldehyde whose carbonyl group was converted to a bis(2-nitrobenzyl)acetal group was prepared for the synthesis of photoresponsive α-chloroaldehyde (PCA)-conjugated ODN. The bis(2-nitrobenzyl)acetal group of a PCA-thymidine conjugate was completely removed by UV irradiation at 365 nm (400 mW/cm(2)) for 1 min. Photo-cross-linking studies revealed that PCA-ODN selectively reacted with the target nucleotides having an adenine or a cytosine moiety at the frontal position of the α-chloroaldehyde group.
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Affiliation(s)
- Akio Kobori
- Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
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15
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Op de Beeck M, Madder A. Sequence specific DNA cross-linking triggered by visible light. J Am Chem Soc 2012; 134:10737-40. [PMID: 22698383 DOI: 10.1021/ja301901p] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A new biocompatible strategy for photoinduced DNA interstrand cross-linking is presented. Methylene blue induced (1)O(2) formation triggers furan oxidation; the resulting aldehyde then rapidly reacts with complementary A or C with formation of stable adducts. Easily accessible furan modified nucleosides, a commercially available photosensitizer, and visible light irradiation constitute the necessary tools to achieve selective duplex interstrand cross-linking.
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Affiliation(s)
- Marieke Op de Beeck
- Laboratory for Organic and Biomimetic Chemistry, University of Ghent, Krijgslaan 281 S4, B-9000 Ghent, Belgium
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