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Sil S, Bertilla J, Rupachandra S. A comprehensive review on RNA interference-mediated targeting of interleukins and its potential therapeutic implications in colon cancer. 3 Biotech 2023; 13:18. [PMID: 36568500 PMCID: PMC9768089 DOI: 10.1007/s13205-022-03421-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
Colon cancer is the world's fourth leading cause of death. It is cancer of the latter part of the large intestine, i.e. the colon. Chronic inflammation over a long period also leads to the development of cancer. Cancer in the colon region is arduous to diagnose and is detected at a later stage when it metastasizes to other parts of the body like the liver, lungs, peritoneum, etc. Colon cancer is a great example of solid tumours associated with chronic inflammation. Although conventional therapies are effective, they lose their effectiveness beyond a certain point. Relapse of the disease occurs frequently. RNA interference (RNAi) is emerging as a great tool to specifically attack the cancer cells of a target site like the colon. RNAi deals with epigenetic changes made in the defective cells which ultimately leads to their death without harming the healthy cells. In this review, two types of epigenetic modulators have been considered, namely siRNA and miRNA, and their effect on interleukins. Interleukins, a class of cytokines, are major inflammatory responses of the body that are released by immune cells like leukocytes and macrophages. Some of these interleukins are pro-inflammatory, thereby promoting inflammation which eventually causes cancer. RNAi can prevent colon cancer by inhibiting pro-inflammatory interleukins.
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Affiliation(s)
- Sagari Sil
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603 203 India
| | - Janet Bertilla
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603 203 India
| | - S. Rupachandra
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603 203 India
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2
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Doherty EE, Wilcox XE, van Sint Fiet L, Kemmel C, Turunen JJ, Klein B, Tantillo DJ, Fisher AJ, Beal PA. Rational Design of RNA Editing Guide Strands: Cytidine Analogs at the Orphan Position. J Am Chem Soc 2021; 143:6865-6876. [PMID: 33939417 PMCID: PMC8608393 DOI: 10.1021/jacs.0c13319] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Adenosine Deaminases Acting on RNA (ADARs) convert adenosine to inosine in double stranded RNA. Human ADARs can be directed to predetermined target sites in the transcriptome by complementary guide strands, allowing for the correction of disease-causing mutations at the RNA level. Here we use structural information available for ADAR2-RNA complexes to guide the design of nucleoside analogs for the position in the guide strand that contacts a conserved glutamic acid residue in ADARs (E488 in human ADAR2), which flips the adenosine into the ADAR active site for deamination. Mutating this residue to glutamine (E488Q) results in higher activity because of the hydrogen bond donating ability of Q488 to N3 of the orphan cytidine on the guide strand. We describe the evaluation of cytidine analogs for this position that stabilize an activated conformation of the enzyme-RNA complex and increase catalytic rate for deamination by the wild-type enzyme. A new crystal structure of ADAR2 bound to duplex RNA bearing a cytidine analog revealed a close contact between E488, stabilized by an additional hydrogen bond and altered charge distribution when compared to cytidine. In human cells and mouse primary liver fibroblasts, this single nucleotide modification increased directed editing yields when compared to an otherwise identical guide oligonucleotide. Our results show that modification of the guide RNA can mimic the effect of hyperactive mutants and advance the approach of recruiting endogenous ADARs for site-directed RNA editing.
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Affiliation(s)
- Erin E Doherty
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Xander E Wilcox
- Department of Chemistry, University of California, Davis, California 95616, United States
| | | | | | | | - Bart Klein
- ProQR Therapeutics, 2333 CK Leiden, The Netherlands
| | - Dean J Tantillo
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Andrew J Fisher
- Department of Chemistry, University of California, Davis, California 95616, United States
- Department of Molecular and Cellular Biology, University of California, Davis, California 95616, United States
| | - Peter A Beal
- Department of Chemistry, University of California, Davis, California 95616, United States
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3
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Allahyari SE, Hajizadeh F, Zekiy AO, Mansouri N, Gilan PS, Mousavi SM, Masjedi A, Hassannia H, Ahmadi M, Mohammadi H, Yousefi M, Izadi S, Zolbanin NM, Jafari R, Jadidi-Niaragh F. Simultaneous inhibition of CD73 and IL-6 molecules by siRNA-loaded nanoparticles prevents the growth and spread of cancer. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 34:102384. [PMID: 33771704 DOI: 10.1016/j.nano.2021.102384] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 02/11/2021] [Accepted: 03/03/2021] [Indexed: 01/11/2023]
Abstract
High concentrations of adenosine and interleukin (IL)-6 in the tumor microenvironment have been identified as one of the leading causes of cancer growth. Thus, we decided to inhibit the growth of cancer cells by inhibiting the production of adenosine and IL-6 in the tumor environment at the same time. For this purpose, we used chitosan-lactate-PEG-TAT (CLP-TAT) nanoparticles (NPs) loaded with siRNA molecules against CD73, an adenosine-producing enzyme, and IL-6. Proper physicochemical properties of the produced NPs led to high cell uptake and suppression of target molecules. Administration of these NPs to tumor-bearing mice (4T1 and CT26 models) greatly reduced the size of the tumor and increased the survival of the mice, which was accompanied by an increase in anti-tumor T lymphocyte responses. These findings suggest that combination therapy using siRNA-loaded CLP-TAT NPs against CD73 and IL-6 molecules could be an effective treatment strategy against cancer that needs further study.
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Affiliation(s)
- Sima Emadi Allahyari
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Farnaz Hajizadeh
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran; Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Angelina Olegovna Zekiy
- Department of Prosthetic Dentistry, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Niloofar Mansouri
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parisa Sahami Gilan
- Medical Biology Research Center, Health Technologies Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | | | - Ali Masjedi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Hassannia
- Immunogenetic Research Center, Faculty of Medicine and Amol Faculty of Paramedical Sciences, Mazandaran University of Medical Sciences, Sari, Iran
| | - Majid Ahmadi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamed Mohammadi
- Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Mehdi Yousefi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sepideh Izadi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Naime Majidi Zolbanin
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Urmia University of Medical Sciences, Urmia, Iran
| | - Reza Jafari
- Solid Tumor Research Center, Cellular and Medicine Research Institute, Urmia University of Medical Sciences, Urmia, Iran.
| | - Farhad Jadidi-Niaragh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
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4
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Efthymiou T, Gavette J, Stoop M, De Riccardis F, Froeyen M, Herdewijn P, Krishnamurthy R. Chimeric XNA: An Unconventional Design for Orthogonal Informational Systems. Chemistry 2018; 24:12811-12819. [PMID: 29901248 DOI: 10.1002/chem.201802287] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/12/2018] [Indexed: 10/14/2022]
Abstract
The paradigm of homogenous-sugar-backbone of RNA and DNA has reliably guided the construction of many functional and useful xeno nucleic acid (XNA) systems to date. Deviations from this monotonous and canonical design, in many cases, results in oligonucleotide systems that lack base pairing with themselves, or with RNA or DNA. Here we show that nucleotides of two such compromised XNA systems can be combined with RNA and DNA in specific patterns to produce chimeric-backbone oligonucleotides, which in certain cases demonstrate base pairing properties comparable to-or stronger than-canonical systems, while also altering the conventional Watson-Crick pairing behavior. The unorthodox pairing properties generated from these chimeric sugar-backbone oligonucleotides suggest a counterintuitive approach of creating modules consisting of non-base pairing XNAs with RNA/DNA in a set pattern. This strategy has the potential to increase the diversity of unconventional nucleic acids leading to orthogonal backbone-sequence-controlled informational systems.
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Affiliation(s)
- Tim Efthymiou
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.,NSF/NASA Center for Chemical Evolution, Atlanta, GA, 30332, USA
| | - Jesse Gavette
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.,NSF/NASA Center for Chemical Evolution, Atlanta, GA, 30332, USA
| | - Matthias Stoop
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.,NSF/NASA Center for Chemical Evolution, Atlanta, GA, 30332, USA
| | - Francesco De Riccardis
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.,NSF/NASA Center for Chemical Evolution, Atlanta, GA, 30332, USA.,Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano, Salerno, Italy
| | - Mathy Froeyen
- Department of Medicinal Chemistry, Institute for Medical Research, KU Leuven, Herestraat, 49, Leuven, 3000, Belgium
| | - Piet Herdewijn
- Department of Medicinal Chemistry, Institute for Medical Research, KU Leuven, Herestraat, 49, Leuven, 3000, Belgium
| | - Ramanarayanan Krishnamurthy
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.,NSF/NASA Center for Chemical Evolution, Atlanta, GA, 30332, USA
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5
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Alexander-Bryant AA, Zhang H, Attaway CC, Pugh W, Eggart L, Sansevere RM, Andino LM, Dinh L, Cantini LP, Jakymiw A. Dual peptide-mediated targeted delivery of bioactive siRNAs to oral cancer cells in vivo. Oral Oncol 2017; 72:123-131. [PMID: 28797448 DOI: 10.1016/j.oraloncology.2017.07.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/19/2017] [Accepted: 07/04/2017] [Indexed: 01/27/2023]
Abstract
OBJECTIVES Despite significant advances in cancer treatment, the prognosis for oral cancer remains poor in comparison to other cancer types, including breast, skin, and prostate. As a result, more effective therapeutic modalities are needed for the treatment of oral cancer. Consequently, in the present study, we examined the feasibility of using a dual peptide carrier approach, combining an epidermal growth factor receptor (EGFR)-targeting peptide with an endosome-disruptive peptide, to mediate targeted delivery of small interfering RNAs (siRNAs) into EGFR-overexpressing oral cancer cells and induce silencing of the targeted oncogene, cancerous inhibitor of protein phosphatase 2A (CIP2A). MATERIALS AND METHODS Fluorescence microscopy, real-time PCR, Western blot analysis, and in vivo bioimaging of mice containing orthotopic xenograft tumors were used to examine the ability of the dual peptide carrier to mediate specific delivery of bioactive siRNAs into EGFR-overexpressing oral cancer cells/tissues. RESULTS Co-complexation of the EGFR-targeting peptide, GE11R9, with the endosome-disruptive 599 peptide facilitated the specific uptake of siRNAs into oral cancer cells overexpressing EGFR in vitro with optimal gene silencing observed at a 60:30:1 (GE11R9:599:siRNA) molar ratio. Furthermore, when administered systemically to mice bearing xenograft oral tumors, this dual peptide complex mediated increased targeted delivery of siRNAs into tumor tissues in comparison to the 599 peptide alone and significantly enhanced CIP2A silencing. CONCLUSION Herein we provide the first report demonstrating the clinical potential of a dual peptide strategy for siRNA-based therapeutics by synergistically mediating the effective targeting and delivery of bioactive siRNAs into EGFR-overexpressing oral cancer cells.
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Affiliation(s)
- Angela A Alexander-Bryant
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA; Department of Bioengineering, Clemson University, Clemson, SC 29634, USA
| | - Haiwen Zhang
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA
| | - Christopher C Attaway
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA
| | - William Pugh
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA
| | - Laurence Eggart
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA
| | - Robert M Sansevere
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA
| | - Lourdes M Andino
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA
| | - Lu Dinh
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA
| | - Liliana P Cantini
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA
| | - Andrew Jakymiw
- Department of Oral Health Sciences and Center for Oral Health Research, Hollings Cancer Center, Medical University of South Carolina (MUSC), Charleston, SC 29425, USA; Department of Bioengineering, Clemson University, Clemson, SC 29634, USA.
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6
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Well-defined reducible cationic nanogels based on functionalized low-molecular-weight PGMA for effective pDNA and siRNA delivery. Acta Biomater 2016; 41:282-92. [PMID: 27267781 DOI: 10.1016/j.actbio.2016.06.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 05/28/2016] [Accepted: 06/02/2016] [Indexed: 01/05/2023]
Abstract
UNLABELLED Nucleic acid-based gene therapy is a promising treatment option to cure numerous intractable diseases. For non-viral gene carriers, low-molecular-weight polymeric vectors generally demonstrate poor transfection performance, but benefit their final removals from the body. Recently, it was reported that aminated poly(glycidyl methacrylate) (PGMA) is one potential gene vector. Based on ethylenediamine (ED)-functionalized low-molecular-weight PGMA (denoted by PGED), a flexible strategy was herein proposed to design new well-defined reducible cationic nanogels (denoted by PGED-NGs) with friendly crosslinking reagents for highly efficient nucleic acid delivery. α-Lipoic acid (LA), one natural antioxidant in human body, was readily introduced into ED-functionalized PGMA and crosslinked to produce cationic PGED-NGs with plentiful reducible lipoyl groups. PGED-NGs could effectively complex plasmid DNA (pDNA) and short interfering RNA (siRNA). Compared with pristine PGED, PGED-NGs exhibited much better performance of pDNA transfection. PGED-NGs also could efficiently transport MALAT1 siRNA (siR-M) into hepatoma cells and significantly suppressed the cancer cell proliferation and migration. The present work indicated that reducible cationic nanogels involving LA crosslinking reagents are one kind of competitive candidates for high-performance nucleic acid delivery systems. STATEMENT OF SIGNIFICANCE Recently, the design of new types of high-performance nanoparticles is of great significance in delivering therapeutics. Nucleic acid-based therapy is a promising treatment option to cure numerous intractable diseases. A facile and straightforward strategy to fabricate safe nucleic acid delivery nanovectors is highly desirable. In this work, based on ethylenediamine-functionalized low-molecular-weight poly(glycidyl methacrylate), a flexible strategy was proposed to design new well-defined reducible cationic nanogels (denoted by PGED-NGs) with α-Lipoic acid, one friendly crosslinking reagent, for highly efficient nucleic acid delivery. Such PGED-NGs possess plentiful reducible lipoyl groups, effectively encapsulated pDNA and siRNA and exhibited excellent abilities of nucleic acid delivery. The present work indicated that reducible cationic nanogels involving α-lipoic acid crosslinking reagents are one kind of competitive candidates for high-performance nucleic acid delivery systems.
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7
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Zewge D, Gosselin F, Kenski DM, Li J, Jadhav V, Yuan Y, Nerurkar SS, Tellers DM, Flanagan WM, Davies IW. High-throughput chemical modification of oligonucleotides for systematic structure-activity relationship evaluation. Bioconjug Chem 2014; 25:2222-32. [PMID: 25398098 DOI: 10.1021/bc500453q] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Chemical modification of siRNA is achieved in a high-throughput manner (96-well plate format) by copper catalyzed azide-alkyne cycloadditions. This transformation can be performed in one synthetic operation at up to four positions with complete specificity, good yield, and acceptable purity. As demonstrated here, this approach extends the current synthetic options for oligonucleotide modifications and simultaneously facilitates the systematic, rapid biological evaluation of modified siRNA.
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Affiliation(s)
- Daniel Zewge
- Department of Process Chemistry, Merck Research Laboratories , Rahway, New Jersey 07065, United States
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8
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Efficient siRNA delivery and tumor accumulation mediated by ionically cross-linked folic acid–poly(ethylene glycol)–chitosan oligosaccharide lactate nanoparticles: For the potential targeted ovarian cancer gene therapy. Eur J Pharm Sci 2014; 52:48-61. [DOI: 10.1016/j.ejps.2013.10.011] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 10/04/2013] [Accepted: 10/21/2013] [Indexed: 12/26/2022]
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9
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Hamasaki T, Matsumoto T, Sakamoto N, Shimahara A, Kato S, Yoshitake A, Utsunomiya A, Yurimoto H, Gabazza EC, Ohgi T. Synthesis of ¹⁸O-labeled RNA for application to kinetic studies and imaging. Nucleic Acids Res 2013; 41:e126. [PMID: 23632164 PMCID: PMC3695515 DOI: 10.1093/nar/gkt344] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Radioisotopes and fluorescent compounds are frequently used for RNA labeling but are unsuitable for clinical studies of RNA drugs because of the risk from radiation exposure or the nonequivalence arising from covalently attached fluorophores. Here, we report a practical phosphoramidite solid-phase synthesis of 18O-labeled RNA that avoids these disadvantages, and we demonstrate its application to quantification and imaging. The synthesis involves the introduction of a nonbridging 18O atom into the phosphate group during the oxidation step of the synthetic cycle by using 18O water as the oxygen donor. The 18O label in the RNA was stable at pH 3–8.5, while the physicochemical and biological properties of labeled and unlabeled short interfering RNA were indistinguishable by circular dichroism, melting temperature and RNA-interference activity. The 18O/16O ratio as measured by isotope ratio mass spectrometry increased linearly with the concentration of 18O-labeled RNA, and this technique was used to determine the blood concentration of 18O-labeled RNA after administration to mice. 18O-labeled RNA transfected into human A549 cells was visualized by isotope microscopy. The RNA was observed in foci in the cytoplasm around the nucleus, presumably corresponding to endosomes. These methodologies may be useful for kinetic and cellular-localization studies of RNA in basic and pharmaceutical studies.
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Affiliation(s)
- Tomohiro Hamasaki
- Strategic Headquarters for Research and Development, BONAC Corporation, BIO Factory 4F, 4-1488 Aikawa, Kurume, Fukuoka 839-0861, Japan
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Efthymiou T, Gong W, Desaulniers JP. Chemical architecture and applications of nucleic acid derivatives containing 1,2,3-triazole functionalities synthesized via click chemistry. Molecules 2012; 17:12665-703. [PMID: 23103533 PMCID: PMC6268694 DOI: 10.3390/molecules171112665] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 10/19/2012] [Accepted: 10/19/2012] [Indexed: 11/16/2022] Open
Abstract
There is considerable attention directed at chemically modifying nucleic acids with robust functional groups in order to alter their properties. Since the breakthrough of copper-assisted azide-alkyne cycloadditions (CuAAC), there have been several reports describing the synthesis and properties of novel triazole-modified nucleic acid derivatives for potential downstream DNA- and RNA-based applications. This review will focus on highlighting representative novel nucleic acid molecular structures that have been synthesized via the “click” azide-alkyne cycloaddition. Many of these derivatives show compatibility for various applications that involve enzymatic transformation, nucleic acid hybridization, molecular tagging and purification, and gene silencing. The details of these applications are discussed. In conclusion, the future of nucleic acid analogues functionalized with triazoles is promising.
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Affiliation(s)
| | | | - Jean-Paul Desaulniers
- Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe St N, Oshawa, ON L1H 7K4, Canada
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SiRNAs conjugated with aromatic compounds induce RISC-mediated antisense strand selection and strong gene-silencing activity. Biochem Biophys Res Commun 2012; 426:571-7. [DOI: 10.1016/j.bbrc.2012.08.128] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 08/27/2012] [Indexed: 11/22/2022]
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12
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Kohler M, Schänzer W, Thevis M. RNA interference for performance enhancement and detection in doping control. Drug Test Anal 2012; 3:661-7. [PMID: 22031503 DOI: 10.1002/dta.330] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
RNA interference represents a comparably new route of regulating and manipulating specific gene expression. Promising results were obtained in experimental therapies aim at the treatment of different kinds of diseases including cancer, diabetes mellitus or Dychenne muscular dystrophy. While studies on down-regulation efficiency are often performed by analyzing the regulated protein, the direct detection of small, interfering RNA molecules and antisense oligonucleotides is of great interest for the investigation of the metabolism and degradation and also for the detection of a putative misuse of these molecules in sports. Myostatin down-regulation was shown to result in increased performance and muscle growth and the regulation of several other proteins could be relevant for performance enhancement. This mini-review summarizes current approaches for the mass spectrometric analysis of siRNA and antisense oligonucleotides from biological matrices and the available data on biodistribution, metabolism, and half-life of relevant substances are discussed.
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Affiliation(s)
- Maxie Kohler
- Center for Preventive Doping Research/Institute of Biochemistry, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933, Cologne, Germany
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Ye G, Beverly M. The use of strong anion-exchange (SAX) magnetic particles for the extraction of therapeutic siRNA and their analysis by liquid chromatography/mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2011; 25:3207-3215. [PMID: 22006382 DOI: 10.1002/rcm.5221] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Traditional methods for extracting oligonucleotides from serum and other biological fluids are often time-consuming and require multiple steps. Magnetic particle based separation of oligonucleotides has gained importance recently due to the advantages of simplicity and high efficiency. Here we report the development and optimization of commercially available strong anion-exchange (SAX) magnetic beads for the extraction of siRNA from human serum. The beads allowed for rapid extraction of siRNA from human serum in 100-200 μL of liquid chromatography/mass spectrometry (LC/MS)-compatible buffer in less than 1 h for a 96-well plate with no further drying steps. Due to the strong cation-binding properties of oligonucleotides, volatile ammonium salts such as triethylammonium bicarbonate (TEAB), ammonium bicarbonate, and NH(4) Cl were used to elute the siRNA from the beads. For more hydrophobic siRNA sequences, the addition of 5-10% organic solvent was required for elution. The recovery of chemically modified siRNA from human serum was around 80% for two types of beads examined; however, the recovery for highly modified sequences differed greatly between the two types of beads. In addition to extracting highly modified oligonucleotides, the SAX beads were also able to extract liposomal formulated siRNAs from serum with no interference from the lipid formulation. The extraction of siRNA from human serum was linear over the tested range of 50 ng/mL to 10 µg/mL. Using this extraction methodology, we have created a workflow to monitor siRNA serum stability by LC/MS. Initial observations confirm that RNase A type degradation with strand cleavage on the 3' side of uridine or cytosine is the dominant cleavage pattern in serum. This finding has implications for the selection and modification of therapeutic siRNAs and demonstrates the utility of magnetic beads as a simple and rapid extraction technique for siRNA.
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Affiliation(s)
- Guofeng Ye
- RNAi Therapeutics, NIBR Biologics Center, Novartis Institutes for BioMedical Research (NIBR), Inc., 250 Massachusetts Avenue, Cambridge, MA 02139, USA
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14
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Mass spectrometric detection of siRNA in plasma samples for doping control purposes. Anal Bioanal Chem 2010; 398:1305-12. [DOI: 10.1007/s00216-010-4013-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Revised: 07/05/2010] [Accepted: 07/06/2010] [Indexed: 12/31/2022]
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15
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RNAi as a new therapeutic strategy against HCV. Biotechnol Adv 2010; 28:27-34. [PMID: 19729057 DOI: 10.1016/j.biotechadv.2009.08.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Revised: 08/18/2009] [Accepted: 08/20/2009] [Indexed: 12/23/2022]
Abstract
Hepatitis C virus is a major cause of liver associated diseases all over the world. Irrespective of the significant advances in the current therapy, drugs and vaccines are restricted with many factors such as toxicity, complexity, cost and resistance. New technologies particularly RNA interference (RNAi) mediated by small interfering RNA (siRNA) have become more and more interesting and effective therapeutic entities to silence pathogenic gene products associated with disease, including cancer, viral infections and autoimmune disorders. RNAi works at a posttranscriptional level by targeting mRNA as a mean for inhibiting the synthesis of the encoded protein. Several reports have indicated the efficiency and specificity of synthetic and vector based siRNAs inhibiting HCV replication. In the present review, we focused on the recent development in the potential use and issues regarding siRNA as a therapy for HCV.
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Boyer C, Priyanto P, Davis TP, Pissuwan D, Bulmus V, Kavallaris M, Teoh WY, Amal R, Carroll M, Woodward R, St Pierre T. Anti-fouling magnetic nanoparticles for siRNA delivery. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b914063h] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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