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Chen S, Mao Q, Cheng H, Tai W. RNA-Binding Small Molecules in Drug Discovery and Delivery: An Overview from Fundamentals. J Med Chem 2024; 67:16002-16017. [PMID: 39287926 DOI: 10.1021/acs.jmedchem.4c01330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
RNA molecules, similar to proteins, fold into complex structures to confer diverse functions in cells. The intertwining of functions with RNA structures offers a new therapeutic opportunity for small molecules to bind and manipulate disease-relevant RNA pathways, thus creating a therapeutic realm of RNA-binding small molecules. The ongoing interest in RNA targeting and subsequent screening campaigns have led to the identification of numerous compounds that can regulate RNAs from splicing, degradation to malfunctions, with therapeutic benefits for a variety of diseases. Moreover, along with the rise of RNA-based therapeutics, RNA-binding small molecules have expanded their application to the modification, regulation, and delivery of RNA drugs, leading to the burgeoning interest in this field. This Perspective overviews the emerging roles of RNA-binding small molecules in drug discovery and delivery, covering aspects from their action fundamentals to therapeutic applications, which may inspire researchers to advance the field.
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Affiliation(s)
- Siyi Chen
- Department of Pharmaceutical Engineering, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430071, China
- Department of Pharmacy, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China
| | - Qi Mao
- Department of Pharmaceutical Engineering, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430071, China
- Department of Pharmacy, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China
| | - Hong Cheng
- Department of Pharmaceutical Engineering, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430071, China
- Department of Pharmacy, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China
| | - Wanyi Tai
- Department of Pharmaceutical Engineering, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430071, China
- Department of Pharmacy, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China
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2
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Song Y, Cui J, Zhu J, Kim B, Kuo ML, Potts PR. RNATACs: Multispecific small molecules targeting RNA by induced proximity. Cell Chem Biol 2024; 31:1101-1117. [PMID: 38876100 DOI: 10.1016/j.chembiol.2024.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 05/09/2024] [Accepted: 05/22/2024] [Indexed: 06/16/2024]
Abstract
RNA-targeting small molecules (rSMs) have become an attractive modality to tackle traditionally undruggable proteins and expand the druggable space. Among many innovative concepts, RNA-targeting chimeras (RNATACs) represent a new class of multispecific, induced proximity small molecules that act by chemically bringing RNA targets into proximity with an endogenous RNA effector, such as a ribonuclease (RNase). Depending on the RNA effector, RNATACs can alter the stability, localization, translation, or splicing of the target RNA. Although still in its infancy, this new modality has the potential for broad applications in the future to treat diseases with high unmet need. In this review, we discuss potential advantages of RNATACs, recent progress in the field, and challenges to this cutting-edge technology.
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Affiliation(s)
- Yan Song
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA.
| | - Jia Cui
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA
| | - Jiaqiang Zhu
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA
| | - Boseon Kim
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA
| | - Mei-Ling Kuo
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA
| | - Patrick Ryan Potts
- Induced Proximity Platform, Amgen Research, Thousand Oaks, CA 91320, USA.
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3
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Martin C, Bonnet M, Patino N, Azoulay S, Di Giorgio A, Duca M. Design, synthesis and evaluation of neomycin‐imidazole conjugates for RNA cleavage. Chempluschem 2022; 87:e202200250. [DOI: 10.1002/cplu.202200250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/30/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Céline Martin
- Université Côte d'Azur Faculté des Sciences: Universite Cote d'Azur Faculte des Sciences Institut de Chimie de Nice 28 Avenue Valrose 06100 Nice FRANCE
| | - Maurinne Bonnet
- Université Côte d'Azur Faculté des Sciences: Universite Cote d'Azur Faculte des Sciences Institut de Chimie de Nice 28 Avenue Valrose 06100 Nice FRANCE
| | - Nadia Patino
- Université Côte d'Azur Faculté des Sciences: Universite Cote d'Azur Faculte des Sciences Institut de Chimie de Nice 28 Avenue Valrose 06100 Nice FRANCE
| | - Stéphane Azoulay
- Université Côte d'Azur Faculté des Sciences: Universite Cote d'Azur Faculte des Sciences Institut de Chimie de Nice 28 Avenue Valrose 06100 Nice FRANCE
| | - Audrey Di Giorgio
- Université Côte d'Azur Faculté des Sciences: Universite Cote d'Azur Faculte des Sciences Institut de Chimie de Nice 28 Avenue Valrose 06100 Nice FRANCE
| | - Maria Duca
- Institut de Chimie de Nice Université Côte d'Azur Parc Valrose 06100 Nice FRANCE
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Perrin D, Paul S, Wong AAWL, Liu LT. Selection of M2+-independent RNA-cleaving DNAzymes with Sidechains Mimicking Arginine and Lysine. Chembiochem 2021; 23:e202100600. [PMID: 34881502 DOI: 10.1002/cbic.202100600] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/04/2021] [Indexed: 11/07/2022]
Abstract
Sequence-specific cleavage of RNA by nucleic acid catalysts in the absence of a divalent metal cation (M 2+ ) has remained an important goal in biomimicry with potential therapeutic applications. Given the lack of functional group diversity in canonical nucleotides, modified nucleotides with amino acid-like side chains were used to enhance self-cleavage rates at a single embedded ribonucleoside site. Previous works relied on three functional groups: an amine, a guanidine and an imidazole ensconced on three different nucleosides. However, to date, few studies have systematically addressed the necessity of all three modifications, as the value of any single modified nucleoside is contextualized at the outset of selection. Herein, we report on the use of only two modified dNTPs, excluding an imidazole, i.e. 5-(3-guanidinoallyl)-2'-dUTP (dU ga TP) and 5-aminoallyl-2'-dCTP (dC aa TP), to select in-vitro self-cleaving DNAzymes that cleave in the absence of M 2+ in a pH-independent fashion. Cleavage shows biphasic kinetics with rate constants that are significantly higher than in unmodified DNAzymes and compare favorably to certain DNAzymes involving an imidazole. This work is the first report of a M2+-independent DNAzyme with two cationic modifications; as such it shows appreciable self-cleaving activity in the absence of an imidazole modification.
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Affiliation(s)
- David Perrin
- U. British Columbia, Chemistry, 2036 Main Mall, V6T-1Z1, Vancouver, CANADA
| | - Somdeb Paul
- The University of British Columbia, Chemistry, 2036 Main Mall, Vancouver, V6T1Z1, Vancouver, CANADA
| | - Antonio A W L Wong
- The University of British Columbia, Chemistry, 2036 Main Mall, Vancouver, V6T1Z1, Vancouver, CANADA
| | - Leo T Liu
- The University of British Columbia, Chemistry, 2036 Main Mall, UBC, Vancouver, V6T-1Z1, Vancouver, CANADA
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5
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Tamkovich N, Koroleva L, Kovpak M, Goncharova E, Silnikov V, Vlassov V, Zenkova M. Design, RNA cleavage and antiviral activity of new artificial ribonucleases derived from mono-, di- and tripeptides connected by linkers of different hydrophobicity. Bioorg Med Chem 2016; 24:1346-55. [PMID: 26899594 DOI: 10.1016/j.bmc.2016.02.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 01/29/2016] [Accepted: 02/05/2016] [Indexed: 11/15/2022]
Abstract
A novel series of metal-free artificial ribonucleases (aRNases) was designed, synthesized and assessed in terms of ribonuclease activity and ability to inactivate influenza virus WSN/A33/H1N1 in vitro. The compounds were built of two short peptide fragments, which include Lys, Ser, Arg, Glu and imidazole residues in various combinations, connected by linkers of different hydrophobicity (1,12-diaminododecane or 4,9-dioxa-1,12-diaminododecane). These compounds efficiently cleaved different RNA substrates under physiological conditions at rates three to five times higher than that of artificial ribonucleases described earlier and displayed RNase A-like cleavage specificity. aRNases with the hydrophobic 1,12-diaminododecane linker displayed ribonuclease activity 3-40 times higher than aRNases with the 4,9-dioxa-1,12-diaminododecane linker. The assumed mechanism of RNA cleavage was typical for natural ribonucleases, that is, general acid-base catalysis via the formation of acid/base pairs by functional groups of amino acids present in the aRNases; the pH profile of cleavage confirmed this mechanism. The most active aRNases under study exhibited high antiviral activity and entirely inactivated influenza virus A/WSN/33/(H1N1) after a short incubation period of viral suspension under physiological conditions.
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Affiliation(s)
- Nikolay Tamkovich
- Institute of Chemical Biology and Fundamental Medicine, Lavrentiev Ave, 8, Novosibirsk 630090, Russia
| | - Lyudmila Koroleva
- Institute of Chemical Biology and Fundamental Medicine, Lavrentiev Ave, 8, Novosibirsk 630090, Russia
| | - Mikhail Kovpak
- Institute of Chemical Biology and Fundamental Medicine, Lavrentiev Ave, 8, Novosibirsk 630090, Russia
| | - Elena Goncharova
- Institute of Chemical Biology and Fundamental Medicine, Lavrentiev Ave, 8, Novosibirsk 630090, Russia
| | - Vladimir Silnikov
- Institute of Chemical Biology and Fundamental Medicine, Lavrentiev Ave, 8, Novosibirsk 630090, Russia
| | - Valentin Vlassov
- Institute of Chemical Biology and Fundamental Medicine, Lavrentiev Ave, 8, Novosibirsk 630090, Russia
| | - Marina Zenkova
- Institute of Chemical Biology and Fundamental Medicine, Lavrentiev Ave, 8, Novosibirsk 630090, Russia.
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6
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2,6-Bis(1,4,7,10-tetraazacyclododecan-1-ylmethyl)pyridine and Its Benzene Analog as Nonmetallic Cleaving Agents of RNA Phosphodiester Linkages. Int J Mol Sci 2015; 16:17798-811. [PMID: 26247935 PMCID: PMC4581222 DOI: 10.3390/ijms160817798] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 07/13/2015] [Accepted: 07/28/2015] [Indexed: 01/10/2023] Open
Abstract
2,6-Bis(1,4,7,10-tetraazacyclododecan-1-ylmethyl)pyridine (11a) and 1,3-bis(1,4,7,10-tetraazacyclododecan-1-ylmethyl)benzene (11b) have been shown to accelerate at 50 mmol·L−1 concentration both the cleavage and mutual isomerization of uridylyl-3′,5′-uridine and uridylyl-2′,5′-uridine by up to two orders of magnitude. The catalytically active ionic forms are the tri- (in the case of 11b) tetra- and pentacations. The pyridine nitrogen is not critical for efficient catalysis, since the activity of 11b is even slightly higher than that of 11a. On the other hand, protonation of the pyridine nitrogen still makes 11a approximately four times more efficient as a catalyst, but only for the cleavage reaction. Interestingly, the respective reactions of adenylyl-3′,5′-adenosine were not accelerated, suggesting that the catalysis is base moiety selective.
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Dhawan G, Chandra R, Gupta KC, Kumar P. Facile and rapid deprotection conditions for the cleavage of synthetic oligonucleotides from 1,4-anhydroerythritol-based universal polymer support. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2015; 34:149-62. [PMID: 25710353 DOI: 10.1080/15257770.2014.975244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
In our previous report [Kumar, P.; Dhawan, G.; Chandra, R.; Gupta, K.C. Polyamine-assisted rapid and clean cleavage of oligonucleotides from cis-diol bearing universal support. Nucl. Acids Res. 2002, 30, e130 (1-8)], we demonstrated polyamine-mediated deprotection of oligonucleotides from cis-diol group bearing universal polymer support (I). However, vulnerability of the conventional dC(bz) to modifications under these conditions compelled us to employ dC(ac) during synthesis of oligonucleotide using conventional synthons. Here, a new set of simple and rapid deprotection conditions has been developed for the complete cleavage of oligonucleotides from the 1,4-anhydroerythritol-based universal polymer support employing conventional dC(bz) synthon. Using manganese-imidazole complex in aqueous ammonium hydroxide (∼ 30%), fully deprotected oligonucleotide sequences were obtained in 40 min, which were analyzed on reverse phase-HPLC and compared with the standard oligomers in terms of their retention time. Finally, their biological compatibility was established by analyzing PCR amplified products of npsA gene of N. meningitidis.
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Affiliation(s)
- Gagan Dhawan
- a Nucleic Acids Research Laboratory, CSIR-Institute of Genomics and Integrative Biology , Delhi , India
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9
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Lönnberg H. Cleavage of RNA phosphodiester bonds by small molecular entities: a mechanistic insight. Org Biomol Chem 2011; 9:1687-703. [PMID: 21258754 DOI: 10.1039/c0ob00486c] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
RNA molecules participate in many fundamental cellular processes either as a carrier of genetic information or as a catalyst, and hence, RNA has received increasing interest both as a chemotherapeutic agent and as a target of chemotherapy. In addition the dual nature of RNA has led to the RNA-world concept, i.e. an assumption that the evolution at an early stage of life was based on RNA-like oligomers that were responsible for the storage and transfer of information and as catalysts maintained primitive metabolism. Accordingly, the kinetics and mechanisms of the cleavage of RNA phosphodiester bonds have received interest and it is hoped they will shed light on the mechanisms of enzyme action and on the development of artificial enzymes. The major mechanistic findings concerning the cleavage by small molecules and ions and their significance for the development of efficient and biologically applicable artificial catalysts for RNA hydrolysis are surveyed in the present perspective.
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Affiliation(s)
- Harri Lönnberg
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland.
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10
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Nikolaev Y, Deillon C, Hoffmann SRK, Bigler L, Friess S, Zenobi R, Pervushin K, Hunziker P, Gutte B. The leucine zipper domains of the transcription factors GCN4 and c-Jun have ribonuclease activity. PLoS One 2010; 5:e10765. [PMID: 20505831 PMCID: PMC2874015 DOI: 10.1371/journal.pone.0010765] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Accepted: 04/26/2010] [Indexed: 11/18/2022] Open
Abstract
Basic-region leucine zipper (bZIP) proteins are one of the largest transcription factor families that regulate a wide range of cellular functions. Owing to the stability of their coiled coil structure leucine zipper (LZ) domains of bZIP factors are widely employed as dimerization motifs in protein engineering studies. In the course of one such study, the X-ray structure of the retro-version of the LZ moiety of yeast transcriptional activator GCN4 suggested that this retro-LZ may have ribonuclease activity. Here we show that not only the retro-LZ but also the authentic LZ of GCN4 has weak but distinct ribonuclease activity. The observed cleavage of RNA is unspecific, it is not suppressed by the ribonuclease A inhibitor RNasin and involves the breakage of 3',5'-phosphodiester bonds with formation of 2',3'-cyclic phosphates as the final products as demonstrated by HPLC/electrospray ionization mass spectrometry. Several mutants of the GCN4 leucine zipper are catalytically inactive, providing important negative controls and unequivocally associating the enzymatic activity with the peptide under study. The leucine zipper moiety of the human factor c-Jun as well as the entire c-Jun protein are also shown to catalyze degradation of RNA. The presented data, which was obtained in the test-tube experiments, adds GCN4 and c-Jun to the pool of proteins with multiple functions (also known as moonlighting proteins). If expressed in vivo, the endoribonuclease activity of these bZIP-containing factors may represent a direct coupling between transcription activation and controlled RNA turnover. As an additional result of this work, the retro-leucine zipper of GCN4 can be added to the list of functional retro-peptides.
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Affiliation(s)
- Yaroslav Nikolaev
- Biochemisches Institut der Universität Zürich, Zürich, Switzerland
- Biozentrum der Universität Basel, Basel, Switzerland
| | | | | | - Laurent Bigler
- Organisch-Chemisches Institut der Universität Zürich, Zürich, Switzerland
| | - Sebastian Friess
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Zürich, Switzerland
| | - Renato Zenobi
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Zürich, Switzerland
| | | | | | - Bernd Gutte
- Biochemisches Institut der Universität Zürich, Zürich, Switzerland
- * E-mail:
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11
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Gamble C, Trotard M, Le Seyec J, Abreu-Guerniou V, Gernigon N, Berrée F, Carboni B, Felden B, Gillet R. Antiviral effect of ribonuclease conjugated oligodeoxynucleotides targeting the IRES RNA of the hepatitis C virus. Bioorg Med Chem Lett 2009; 19:3581-5. [PMID: 19450979 DOI: 10.1016/j.bmcl.2009.04.139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2009] [Revised: 04/27/2009] [Accepted: 04/27/2009] [Indexed: 02/05/2023]
Abstract
Hepatitis C virus (HCV) translation initiation is mediated by a highly structured and conserved RNA, termed the Internal Ribosome Entry Site (IRES), located at the 5'-end of its single stranded RNA genome. It is a key target for the development of new antiviral compounds. Here we made use of the recently developed HCV cell culture system to test the antiviral activity of artificial ribonucleases consisting of imidazole(s) linked to antisense oligodeoxynucleotides targeting the HCV IRES. Results from the cell culture model indicate that the naked antisense oligodeoxynucleotide displayed an efficient antiviral activity. Despite the increased activity observed with the addition of imidazole moieties when tested with the cell-free system, it appears that these improvements were not reproduced in the cellular model.
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Affiliation(s)
- Carly Gamble
- Université de Rennes 1, UPRES JE 2311, INSERM U835, Biochimie Pharmaceutique, 2, Avenue du Prof. Léon Bernard, 35043 Rennes, France
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12
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Guerniou V, Gillet R, Berrée F, Carboni B, Felden B. Targeted inhibition of the hepatitis C internal ribosomal entry site genomic RNA with oligonucleotide conjugates. Nucleic Acids Res 2007; 35:6778-87. [PMID: 17921501 PMCID: PMC2175329 DOI: 10.1093/nar/gkm770] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Hepatitis C is a major public health concern, with an estimated 170 million people infected worldwide and an urgent need for new drug development. An attractive therapeutic approach is to prevent the ‘cap-independent’ translation initiation of the viral proteins by interfering with both the structure and function of the hepatitis C viral internal ribosomal entry site (HCV IRES). Towards this goal, we report the design, synthesis and purification of novel bi-functional molecules containing DNA or RNA antisenses attached to functional groups performing RNA hydrolysis. These 5′ or 3′-coupled conjugates bind the HCV IRES with affinity and specificity and elicit targeted hydrolysis of the viral genomic RNA after short (1 h) incubation at low (500 nM) concentration at 37°C in vitro. Additional secondary cleavage sites are induced and their mapping within the RNA structure indicates that functional domains IIIb-e are excised from the IRES that, based on cryo-EM studies, becomes incapable of binding the small ribosomal subunit and initiation factor 3 (eIF3). All these molecules inhibit, in a dose-dependent manner, the ‘IRES-dependent’ translation in vitro. The 5′-coupled imidazole conjugate reduces viral protein synthesis by half at a 300 nM concentration (IC50), corresponding to a 4-fold increase of activity when compared to the naked oligonucleotide. These new conjugates are now being tested for activity on infected hepatic cell lines.
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Affiliation(s)
- Valérie Guerniou
- Biochimie Pharmaceutique, Inserm U835, Upres JE 2311, Université de Rennes 1, France
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13
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Ghatnekar J, Hägerlöf M, Oredsson S, Alm K, Elmroth SKC, Persson T. Construction of polyamine-modified uridine and adenosine derivatives--evaluation of DNA binding capacity and cytotoxicity in vitro. Bioorg Med Chem 2007; 15:7426-33. [PMID: 17869123 DOI: 10.1016/j.bmc.2007.07.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2007] [Revised: 07/05/2007] [Accepted: 07/10/2007] [Indexed: 11/27/2022]
Abstract
We here report the synthesis of the two polyamine-based nucleoside derivatives 5-{[bis-(3-aminopropyl)amino]acetamido-1-propynyl}uridine and 2-{[bis-(3-aminopropyl)amino]-acetamido-1-propynyl}adenosine. The various polyamine derivatives have been used in thermal melting analysis using DNA from herring testes, and in cellular studies using four different cell lines. The compounds were all found to be non-toxic, thus holding good promise for future use as siRNA building blocks.
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Affiliation(s)
- Johannes Ghatnekar
- Organic Chemistry, Chemical Center, Lund Univesity, PO Box 124, SE-22100 Lund, Sweden
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14
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Tamkovich NV, Malyshev AV, Konevets DA, Sil'nikov VN, Zenkova MA, Vlasov VV. Chemical ribonucleases: VII. Effect of positively charged RNA-binding domains and hydrophobic fragments of the conjugates based on 1,4-diazabicyclo[2.2.2]octane and imidazole on their ribonuclease activity. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2007; 33:251-60. [PMID: 17476986 DOI: 10.1134/s1068162007020057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effect of the total positive charge in the RNA-binding domain of chemical ribonucleases that are conjugates of bisquaternary salts of diazabicyclo[2.2.2]octane and imidazol on the cleavage of an HIV-1 RNA fragment was studied. An increase in the positive charge from +2 to +4 was shown to result in a significant growth in the ribonuclease activity. Possible mechanisms of the interactions between structural moieties of chemical ribonucleases and RNA that enable an effective catalysis of the cleavage of phosphodiester bonds are discussed.
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15
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Kovalev N, Burakova E, Silnikov V, Zenkova M, Vlassov V. Artificial ribonucleases: from combinatorial libraries to efficient catalysts of RNA cleavage. Bioorg Chem 2006; 34:274-86. [PMID: 16889817 DOI: 10.1016/j.bioorg.2006.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2006] [Revised: 06/21/2006] [Accepted: 06/21/2006] [Indexed: 11/23/2022]
Abstract
Combinatorial libraries of small organic compounds capable of cleaving RNA were synthesized. The compounds contain benzene ring substituted with two residues of bis quaternary salt of diazabicyclo[2.2.2]octane (DABCO) bearing hydrophobic fragments of different length and structure, attached to DABCO at the bridge position. These compounds, lacking traditional functionalities involved in transesterification reaction, exhibit pronounced RNA cleavage activity. To identify the most active artificial ribonucleases, sublibraries and truncated libraries, containing compounds lacking one of substituents were synthesized. Analysis of ribonuclease activity of truncated libraries resulted in identification of the most active compounds, which are characterized by the presence of at least one long oligomethylene substituent.
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Affiliation(s)
- N Kovalev
- Institute of Chemical Biology and Fundamental Medicine SB RAS, 8, Lavrentiev Ave., Novosibirsk, 630090, Russian Federation
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16
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Delcros JG, Tomasi S, Duhieu S, Foucault M, Martin B, Le Roch M, Eifler-Lima V, Renault J, Uriac P. Effect of Polyamine Homologation on the Transport and Biological Properties of Heterocyclic Amidines. J Med Chem 2005; 49:232-45. [PMID: 16392808 DOI: 10.1021/jm050018q] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Five sets of heterocyclic derivatives of various sizes and complexities coupled by an amidine function to putrescine, spermidine, or spermine were prepared. They were essentially tested to determine the influence of the polyamine chain on their cellular transport. To comment on affinity and on selective transport via the polyamine transport system (PTS), K(i) values for polyamine uptake were determined in L1210 cells, and the cytotoxicity and accumulation of the conjugates were determined in CHO and polyamine transport-deficient mutant CHO-MG cells, as well as in L1210 and alpha-difluoromethylornithine- (DFMO-) treated L1210 cells. Unlike spermine, putrescine and spermidine were clearly identified as selective motifs that enable cellular entry via the PTS. However, this property was clearly limited by the size of substituents: these polyamines were able to ferry a dihydroquinoline system via the PTS but did not impart any selectivity to bulkier substituents.
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Affiliation(s)
- Jean-Guy Delcros
- Groupe de Recherche en Thérapeutique Anticancéreuse, Faculté de Médecine, Université Rennes 1, 2 Avenue du Professeur Léon Bernard, 35043 Rennes Cedex, France.
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17
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Abstract
Mimicking the action of enzymes by simpler and more robust man-made catalysts has long inspired bioorganic chemists. During the past decade, mimics for RNA-cleaving enzymes, ribonucleases, or, more precisely, mimics of ribozymes that cleave RNA in sequence-selective rather than base-selective manner, have received special attention. These artificial ribonucleases are typically oligonucleotides (or their structural analogs) that bear a catalytically active conjugate group and catalyze sequence-selective hydrolysis of RNA phosphodiester bonds.
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Affiliation(s)
- Teija Niittymäki
- Department of Chemistry, University of Turku, FIN-20014, Turku, Finland
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18
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Picard S, Le Roch M, Renault J, Uriac P. Parallel Supported Synthesis of Polyamine−Imidazole Conjugates. Org Lett 2004; 6:4711-4. [PMID: 15575667 DOI: 10.1021/ol0480630] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A small collection of nine polyamine-imidazole conjugates, potentially acting as RNases A mimics, has been synthesized on SynPhase lanterns using amino alcohols and diamines as building blocks. Couplings were performed via S(N)2 alkylation of methanesulfonates with amines. The final introduction of N-4-nitrobenzyloxycarbonyldiamines allowed easy purification of the cleaved compounds.
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Affiliation(s)
- Sylvie Picard
- Université Rennes 1, Institut de Chimie de Rennes, Synthèse et Extraction de Molécules à Visée Thérapeutique, Faculté des Sciences Biologiques et Médicales, 2 avenue du professeur Léon Bernard, 35043 Rennes, France
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Shi Y, Niikura F, Kuzuya A, Komiyama M. Noncovalent Combination of Oligoamine and Oligonucleotide as Totally Organic Site-selective RNA Cutter. CHEM LETT 2004. [DOI: 10.1246/cl.2004.1012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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