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Mikame Y, Sakai Y, Tahara R, Doi K, Yamamoto T, Dohno C, Shibata T, Yamayoshi A. Synthesis and Evaluation of Oligonucleotide-Containing 2'-O-{[(4,5',8-trimethylpsoralen)-4'-ylmethoxy]ethylaminocarb-onyl}adenosine as Photo-crosslinkable Gene Targeting Tools. Chem Pharm Bull (Tokyo) 2022; 70:726-730. [PMID: 35896347 DOI: 10.1248/cpb.c22-00333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Several psoralen-conjugated oligonucleotides (Ps-Oligos) have been developed as photo-crosslinkable oligonucleotides targeting DNA or RNA. To avoid potential off-target effects, it is important to investigate the selective photo-crosslinking reactivity of Ps-Oligos to DNA or RNA. However, the selectivity of these Ps-Oligos has not been reported in detail thus far. In this study, we evaluated the photo-crosslinking properties of two Ps-Oligos, 5'-Ps-Oligo and a novel Ps-Oligo containing 2'-O-{[(4,5',8-trimethylpsoralen)-4'-ylmethoxy]ethylaminocarbonyl}adenosine (APs2-Oligo). Notably, 5'-Ps-Oligo preferentially crosslinked with DNA, whereas APs2-Oligo preferentially crosslinked with RNA. These results demonstrate the interesting crosslinking properties of Ps-Oligos, which will provide useful information for the molecular design of novel Ps-Oligos in future studies.
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Affiliation(s)
- Yu Mikame
- Graduate School of Biomedical Sciences, Nagasaki University
| | - Yui Sakai
- Graduate School of Biomedical Sciences, Nagasaki University
| | - Ryo Tahara
- Graduate School of Biomedical Sciences, Nagasaki University
| | - Kinuka Doi
- Graduate School of Biomedical Sciences, Nagasaki University
| | | | - Chikara Dohno
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University
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2
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Elskens J, Madder A. Crosslinker-modified nucleic acid probes for improved target identification and biomarker detection. RSC Chem Biol 2021; 2:410-422. [PMID: 34458792 PMCID: PMC8341421 DOI: 10.1039/d0cb00236d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 02/11/2021] [Indexed: 01/02/2023] Open
Abstract
Understanding the intricate interaction pattern of nucleic acids with other molecules is essential to gain further insight in biological processes and disease mechanisms. To this end, a multitude of hybridization-based assays have been designed that rely on the non-covalent recognition between complementary nucleic acid sequences. However, the ephemeral nature of these interactions complicates straightforward analysis as low efficiency and specificity are rule rather than exception. By covalently locking nucleic acid interactions by means of a crosslinking agent, the overall efficiency, specificity and selectivity of hybridization-based assays could be increased. In this mini-review we highlight methodologies that exploit the use of crosslinker-modified nucleic acid probes for interstrand nucleic acid crosslinking with the objective to study, detect and identify important targets as well as nucleic acid sequences that can be considered relevant biomarkers. We emphasize on the usefulness and advantages of crosslinking agents and elaborate on the chemistry behind the crosslinking reactions they induce.
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Affiliation(s)
- Joke Elskens
- Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University Krijgslaan 281 Building S4 9000 Ghent Belgium +32-9-264-49-98 +32-9-264-44-72
| | - Annemieke Madder
- Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University Krijgslaan 281 Building S4 9000 Ghent Belgium +32-9-264-49-98 +32-9-264-44-72
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3
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Yamayoshi A, Higuchi M, Sakai Y, Kobori A, Yamamoto T, Shibata T, Murakami A. Selective cross-linking behavior of oligodeoxyribonucleotides containing 2'- O-[ N-(4,5',8-trimethylpsoralen-4'-ylmethylcarbamoyl)]adenosine to mutant H-ras DNA. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 39:119-130. [PMID: 31645189 DOI: 10.1080/15257770.2019.1677912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Point mutations are well characterized activators of oncogenes but are often indistinguishable using common gene technologies. In general, the precise sites of point-mutated oncogenes are difficult to distinguish under physiological conditions primarily because single nucleotide mismatch do not affect the annealing temperatures of DNA probes sufficiently. To address this limitation, we developed photo-responsive oligodeoxyribonucleotides containing 2'-O-[N-(4,5',8-trimethylpsoralen-4'-ylmethylcarbamoyl)]adenosine (Ps-amd-Oligo), which can be used to selectively manipulate and identify genes with point mutations. Here we present time course analyses of the photo-cross-linking efficiency of Ps-amd-Oligo with DNA and RNA and show promising selectivity for the oncogene H-ras.
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Affiliation(s)
- Asako Yamayoshi
- Chemistry of Functional Molecules, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,PRSTO, JST, Kawaguchi, Saitama, Japan
| | - Maiko Higuchi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Yui Sakai
- Chemistry of Functional Molecules, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Akio Kobori
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Tsuyoshi Yamamoto
- Chemistry of Functional Molecules, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Takayuki Shibata
- Graduate School of Health Sciences, Gunma University, Gunma, Japan
| | - Akira Murakami
- Chemistry of Functional Molecules, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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4
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Kikuta K, Taniguchi Y, Sasaki S. Study of the Inducible Cross-Linking Reaction to mRNA and the Effect on the Translation. Chem Pharm Bull (Tokyo) 2019; 67:877-883. [PMID: 31366836 DOI: 10.1248/cpb.c19-00337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The 4-vinylpyrimidin-2-one nucleoside (T-vinyl) forms a cross-link with the RNA containing uracil at the complementary site at a high reaction rate. To obtain the stable T-vinyl derivative so that its reactivity is protected until it access to the target site, several derivatives were investigated, and the 2-thiopyridinyl- and 2-thiopyrimidinyl T-vinyl derivatives were determined to be good candidates. The 2-thiopyrimidinyl T-vinyl derivative was found to more efficiently cross-link with mRNA albeit having a better stability than the 2-thiopyridinyl T-vinyl derivative. The investigation using the luciferase (Luc) mRNA, the synthetic mRNA and non-cellular translation system revealed that the translation is terminated at the end of the cross-linked duplex between the mRNA and the oligoribonucleotide (ORN). Thus, the 2-thiopyrimidinyl T-vinyl derivative has successfully demonstrated both a good stability and high efficiency for the cross-linking reaction, and expanded its applicability in biological applications.
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Affiliation(s)
- Kenji Kikuta
- Graduate School of Pharmaceutical Sciences, Kyushu University
| | | | - Shigeki Sasaki
- Graduate School of Pharmaceutical Sciences, Kyushu University
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5
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Fujimoto K, Sasago S, Mihara J, Nakamura S. DNA Photo-cross-linking Using Pyranocarbazole and Visible Light. Org Lett 2018; 20:2802-2805. [DOI: 10.1021/acs.orglett.8b00593] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kenzo Fujimoto
- Department of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, Asahidai 1-1, Nomi, Ishikawa, 923-1292, Japan
| | - Shinobu Sasago
- Department of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, Asahidai 1-1, Nomi, Ishikawa, 923-1292, Japan
| | - Junichi Mihara
- Department of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, Asahidai 1-1, Nomi, Ishikawa, 923-1292, Japan
| | - Shigetaka Nakamura
- Department of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, Asahidai 1-1, Nomi, Ishikawa, 923-1292, Japan
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6
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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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7
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Sakamoto T, Tanaka Y, Fujimoto K. DNA photo-cross-linking using 3-cyanovinylcarbazole modified oligonucleotide with threoninol linker. Org Lett 2015; 17:936-9. [PMID: 25654759 DOI: 10.1021/acs.orglett.5b00035] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
3-Cyanovinylcarbazole modified D-threoninol ((CNV)D) was incorporated in oligodeoxyribonucleotide and tested for a photo-cross-linking reaction with complementary oligodeoxyribonucleotide. The photoreactivity was 1.8- to 8-fold greater than that of 3-cyanovinylcarbazole modified deoxyribose ((CNV)K) previously reported. From the results of melting analysis and circular dichroism spectroscopy of the duplexes, the relatively flexible structure of (CNV)D compared with (CNV)K might be advantageous for [2 + 2] photocycloaddition between the cyanovinyl group on the (CNV)D and pyrimidine base in the complementary strand.
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Affiliation(s)
- Takashi Sakamoto
- School of Materials Science, ‡Research Center for Bio-architecture, Japan Advanced Institute of Science and Technology , 1-1 Asahi-dai, Nomi, Ishikawa 923-1292, Japan
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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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Fujimoto K, Yamada A, Yoshimura Y, Tsukaguchi T, Sakamoto T. Details of the Ultrafast DNA Photo-Cross-Linking Reaction of 3-Cyanovinylcarbazole Nucleoside: Cis–Trans Isomeric Effect and the Application for SNP-Based Genotyping. J Am Chem Soc 2013; 135:16161-7. [DOI: 10.1021/ja406965f] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | | | | | - Tadashi Tsukaguchi
- Faculty
of Bioresources and Environmental Sciences, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi, Ishikawa 921-8836, Japan
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13
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Fujimoto K, Kishi S, Sakamoto T. Geometric Effect on the Photocrosslinking Reaction between 3-Cyanovinylcarbazole Nucleoside and Pyrimidine Base in DNA/RNA Heteroduplex. Photochem Photobiol 2013; 89:1095-9. [DOI: 10.1111/php.12118] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 06/16/2013] [Indexed: 11/30/2022]
Affiliation(s)
| | - Satomi Kishi
- School of Materials Science; Japan Advanced Institute of Science and Technology; Nomi-shi; Japan
| | - Takashi Sakamoto
- School of Materials Science; Japan Advanced Institute of Science and Technology; Nomi-shi; Japan
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14
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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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15
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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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16
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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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Higuchi M, Yamayoshi A, Kato K, Kobori A, Wake N, Murakami A. Specific regulation of point-mutated K-ras-immortalized cell proliferation by a photodynamic antisense strategy. Oligonucleotides 2010; 20:37-44. [PMID: 20038252 DOI: 10.1089/oli.2008.0173] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
It has been reported that point mutations in genes are responsible for various cancers, and the selective regulation of gene expression is an important factor in developing new types of anticancer drugs. To develop effective drugs for the regulation of point-mutated genes, we focused on photoreactive antisense oligonucleotides. Previously, we reported that photoreactive oligonucleotides containing 2'-O-psoralenylmethoxyethyl adenosine (2'-Ps-eom) showed drastic photoreactivity in a strictly sequence-specific manner. Here, we demonstrated the specific gene regulatory effects of 2'-Ps-eom on [(12)Val]K-ras mutant (GGT --> GTT). Photo-cross-linking between target mRNAs and 2'-Ps-eom was sequence-specific, and the effect was UVA irradiation-dependent. Furthermore, 2'-Ps-eom was able to inhibit K-ras-immortalized cell proliferation (K12V) but not Vco cells that have the wild-type K-ras gene. These results suggest that the 2'-Ps-eom will be a powerful nucleic acid drug to inhibit the expression of disease-causing point mutation genes, and has great therapeutic potential in the treatment of cancer.
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Affiliation(s)
- Maiko Higuchi
- Department of Biomolecular Engineering, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan
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18
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Kobori A, Takaya K, Higuchi M, Yamayoshi A, Murakami A. Synthesis and Photoinduced Cross-linking Reactions of 4,5′,8-Trimethylpsoralen-incorporated Oligodeoxyribonucleotide. CHEM LETT 2009. [DOI: 10.1246/cl.2009.272] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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19
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Synthesis of antisense oligonucleotides containing 2'-O-psoralenylmethoxyalkyl adenosine for photodynamic regulation of point mutations in RNA. Bioorg Med Chem 2008; 17:475-83. [PMID: 19135379 DOI: 10.1016/j.bmc.2008.12.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2008] [Revised: 12/01/2008] [Accepted: 12/02/2008] [Indexed: 12/30/2022]
Abstract
2'-O-psoralen-conjugated antisense oligonucleotide was able to recognize a point mutation of mRNA. It had outstanding ability to photo-cross-link only to oligoribonucleotides (ORN) having a point mutation. This type of antisense molecule is the only one of its kind so far. To give high photo-cross-linking efficiency and sequence selectivity to antisense molecules, we synthesized novel photo-reactive oligonucleotides (2'-Ps-xom) containing psoralen at the 2'-O-position adenosine via an ethoxymethylene (2'-Ps-eom), propoxymethylene (2'-Ps-pom) and butoxymethylene (2'-Ps-bom) linker, respectively. We evaluated the photo-cross-linking efficiency and sequence selectivity in photo-cross-linking of 2'-Ps-xom to the complementary ORN and to an ORN having a mismatch base. Among them, 2'-Ps-eom exhibited superior photo-cross-linking efficiency with high sequence selectivity.
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