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Romano R, Bucci C. Antisense therapy: a potential breakthrough in the treatment of neurodegenerative diseases. Neural Regen Res 2024; 19:1027-1035. [PMID: 37862205 PMCID: PMC10749614 DOI: 10.4103/1673-5374.385285] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/13/2023] [Accepted: 07/21/2023] [Indexed: 10/22/2023] Open
Abstract
Neurodegenerative diseases are a group of disorders characterized by the progressive degeneration of neurons in the central or peripheral nervous system. Currently, there is no cure for neurodegenerative diseases and this means a heavy burden for patients and the health system worldwide. Therefore, it is necessary to find new therapeutic approaches, and antisense therapies offer this possibility, having the great advantage of not modifying cellular genome and potentially being safer. Many preclinical and clinical studies aim to test the safety and effectiveness of antisense therapies in the treatment of neurodegenerative diseases. The objective of this review is to summarize the recent advances in the development of these new technologies to treat the most common neurodegenerative diseases, with a focus on those antisense therapies that have already received the approval of the U.S. Food and Drug Administration.
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Affiliation(s)
- Roberta Romano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy
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2
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Tang Q, Khvorova A. RNAi-based drug design: considerations and future directions. Nat Rev Drug Discov 2024; 23:341-364. [PMID: 38570694 DOI: 10.1038/s41573-024-00912-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2024] [Indexed: 04/05/2024]
Abstract
More than 25 years after its discovery, the post-transcriptional gene regulation mechanism termed RNAi is now transforming pharmaceutical development, proved by the recent FDA approval of multiple small interfering RNA (siRNA) drugs that target the liver. Synthetic siRNAs that trigger RNAi have the potential to specifically silence virtually any therapeutic target with unprecedented potency and durability. Bringing this innovative class of medicines to patients, however, has been riddled with substantial challenges, with delivery issues at the forefront. Several classes of siRNA drug are under clinical evaluation, but their utility in treating extrahepatic diseases remains limited, demanding continued innovation. In this Review, we discuss principal considerations and future directions in the design of therapeutic siRNAs, with a particular emphasis on chemistry, the application of informatics, delivery strategies and the importance of careful target selection, which together influence therapeutic success.
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Affiliation(s)
- Qi Tang
- RNA Therapeutics Institute, University of Massachusetts Chan Medical School, Worcester, MA, USA
- Department of Dermatology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Anastasia Khvorova
- RNA Therapeutics Institute, University of Massachusetts Chan Medical School, Worcester, MA, USA.
- Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA.
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3
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La Sala L, Carlini V, Conte C, Macas-Granizo MB, Afzalpour E, Martin-Delgado J, D'Anzeo M, Pedretti RFE, Naselli A, Pontiroli AE, Cappato R. Metabolic disorders affecting the liver and heart: Therapeutic efficacy of miRNA-based therapies? Pharmacol Res 2024; 201:107083. [PMID: 38309383 DOI: 10.1016/j.phrs.2024.107083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/09/2024] [Accepted: 01/25/2024] [Indexed: 02/05/2024]
Abstract
Liver and heart disease are major causes of death worldwide. It is known that metabolic alteration causing type 2 diabetes (T2D) and Nonalcoholic fatty liver (NAFLD) coupled with a derangement in lipid homeostasis, may exacerbate hepatic and cardiovascular diseases. Some pharmacological treatments can mitigate organ dysfunctions but the important side effects limit their efficacy leading often to deterioration of the tissues. It needs to develop new personalized treatment approaches and recent progresses of engineered RNA molecules are becoming increasingly viable as alternative treatments. This review outlines the current use of antisense oligonucleotides (ASOs), RNA interference (RNAi) and RNA genome editing as treatment for rare metabolic disorders. However, the potential for small non-coding RNAs to serve as therapeutic agents for liver and heart diseases is yet to be fully explored. Although miRNAs are recognized as biomarkers for many diseases, they are also capable of serving as drugs for medical intervention; several clinical trials are testing miRNAs as therapeutics for type 2 diabetes, nonalcoholic fatty liver as well as cardiac diseases. Recent advances in RNA-based therapeutics may potentially facilitate a novel application of miRNAs as agents and as druggable targets. In this work, we sought to summarize the advancement and advantages of miRNA selective therapy when compared to conventional drugs. In particular, we sought to emphasise druggable miRNAs, over ASOs or other RNA therapeutics or conventional drugs. Finally, we sought to address research questions related to efficacy, side-effects, and range of use of RNA therapeutics. Additionally, we covered hurdles and examined recent advances in the use of miRNA-based RNA therapy in metabolic disorders such as diabetes, liver, and heart diseases.
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Affiliation(s)
- Lucia La Sala
- IRCCS MultiMedica, 20138 Milan, Italy; Dept. of Biomedical Sciences for Health, University of Milan, Milan, Italy.
| | | | - Caterina Conte
- IRCCS MultiMedica, 20138 Milan, Italy; Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, Rome, Italy
| | | | - Elham Afzalpour
- Dept. of Biomedical Sciences and Clinic, University of Milan, Milan, Italy
| | - Jimmy Martin-Delgado
- Hospital Luis Vernaza, Junta de Beneficiencia de Guayaquil, 090603 Guayaquil, Ecuador; Instituto de Investigacion e Innovacion en Salud Integral, Universidad Catolica de Santiago de Guayaquil, Guayaquil 090603, Ecuador
| | - Marco D'Anzeo
- AUO delle Marche, SOD Medicina di Laboratorio, Ancona, Italy
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4
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Chen S, Heendeniya SN, Le BT, Rahimizadeh K, Rabiee N, Zahra QUA, Veedu RN. Splice-Modulating Antisense Oligonucleotides as Therapeutics for Inherited Metabolic Diseases. BioDrugs 2024; 38:177-203. [PMID: 38252341 PMCID: PMC10912209 DOI: 10.1007/s40259-024-00644-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2024] [Indexed: 01/23/2024]
Abstract
The last decade (2013-2023) has seen unprecedented successes in the clinical translation of therapeutic antisense oligonucleotides (ASOs). Eight such molecules have been granted marketing approval by the United States Food and Drug Administration (US FDA) during the decade, after the first ASO drug, fomivirsen, was approved much earlier, in 1998. Splice-modulating ASOs have also been developed for the therapy of inborn errors of metabolism (IEMs), due to their ability to redirect aberrant splicing caused by mutations, thus recovering the expression of normal transcripts, and correcting the deficiency of functional proteins. The feasibility of treating IEM patients with splice-switching ASOs has been supported by FDA permission (2018) of the first "N-of-1" study of milasen, an investigational ASO drug for Batten disease. Although for IEM, owing to the rarity of individual disease and/or pathogenic mutation, only a low number of patients may be treated by ASOs that specifically suppress the aberrant splicing pattern of mutant precursor mRNA (pre-mRNA), splice-switching ASOs represent superior individualized molecular therapeutics for IEM. In this work, we first summarize the ASO technology with respect to its mechanisms of action, chemical modifications of nucleotides, and rational design of modified oligonucleotides; following that, we precisely provide a review of the current understanding of developing splice-modulating ASO-based therapeutics for IEM. In the concluding section, we suggest potential ways to improve and/or optimize the development of ASOs targeting IEM.
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Affiliation(s)
- Suxiang Chen
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, 6150, Australia
- Precision Nucleic Acid Therapeutics, Perron Institute for Neurological and Translational Science, Nedlands, WA, 6009, Australia
| | - Saumya Nishanga Heendeniya
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, 6150, Australia
- Precision Nucleic Acid Therapeutics, Perron Institute for Neurological and Translational Science, Nedlands, WA, 6009, Australia
| | - Bao T Le
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, 6150, Australia
- Precision Nucleic Acid Therapeutics, Perron Institute for Neurological and Translational Science, Nedlands, WA, 6009, Australia
- ProGenis Pharmaceuticals Pty Ltd, Bentley, WA, 6102, Australia
| | - Kamal Rahimizadeh
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, 6150, Australia
- Precision Nucleic Acid Therapeutics, Perron Institute for Neurological and Translational Science, Nedlands, WA, 6009, Australia
| | - Navid Rabiee
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, 6150, Australia
- Precision Nucleic Acid Therapeutics, Perron Institute for Neurological and Translational Science, Nedlands, WA, 6009, Australia
| | - Qurat Ul Ain Zahra
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, 6150, Australia
- Precision Nucleic Acid Therapeutics, Perron Institute for Neurological and Translational Science, Nedlands, WA, 6009, Australia
| | - Rakesh N Veedu
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, 6150, Australia.
- Precision Nucleic Acid Therapeutics, Perron Institute for Neurological and Translational Science, Nedlands, WA, 6009, Australia.
- ProGenis Pharmaceuticals Pty Ltd, Bentley, WA, 6102, Australia.
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5
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McVeigh P, McCammick E, Robb E, Brophy P, Morphew RM, Marks NJ, Maule AG. Discovery of long non-coding RNAs in the liver fluke, Fasciola hepatica. PLoS Negl Trop Dis 2023; 17:e0011663. [PMID: 37769025 PMCID: PMC10564125 DOI: 10.1371/journal.pntd.0011663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 10/10/2023] [Accepted: 09/15/2023] [Indexed: 09/30/2023] Open
Abstract
Long non-coding (lnc)RNAs are a class of eukaryotic RNA that do not code for protein and are linked with transcriptional regulation, amongst a myriad of other functions. Using a custom in silico pipeline we have identified 6,436 putative lncRNA transcripts in the liver fluke parasite, Fasciola hepatica, none of which are conserved with those previously described from Schistosoma mansoni. F. hepatica lncRNAs were distinct from F. hepatica mRNAs in transcript length, coding probability, exon/intron composition, expression patterns, and genome distribution. RNA-Seq and digital droplet PCR measurements demonstrated developmentally regulated expression of lncRNAs between intra-mammalian life stages; a similar proportion of lncRNAs (14.2%) and mRNAs (12.8%) were differentially expressed (p<0.001), supporting a functional role for lncRNAs in F. hepatica life stages. While most lncRNAs (81%) were intergenic, we identified some that overlapped protein coding loci in antisense (13%) or intronic (6%) configurations. We found no unequivocal evidence for correlated developmental expression within positionally correlated lncRNA:mRNA pairs, but global co-expression analysis identified five lncRNA that were inversely co-regulated with 89 mRNAs, including a large number of functionally essential proteases. The presence of micro (mi)RNA binding sites in 3135 lncRNAs indicates the potential for miRNA-based post-transcriptional regulation of lncRNA, and/or their function as competing endogenous (ce)RNAs. The same annotation pipeline identified 24,141 putative lncRNAs in F. gigantica. This first description of lncRNAs in F. hepatica provides an avenue to future functional and comparative genomics studies that will provide a new perspective on a poorly understood aspect of parasite biology.
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Affiliation(s)
- Paul McVeigh
- School of Biological Sciences, Queen’s University Belfast, Northern Ireland, United Kingdom
| | - Erin McCammick
- School of Biological Sciences, Queen’s University Belfast, Northern Ireland, United Kingdom
| | - Emily Robb
- School of Biological Sciences, Queen’s University Belfast, Northern Ireland, United Kingdom
| | - Peter Brophy
- Department of Life Sciences, Aberystwyth University, Wales, United Kingdom
| | - Russell M. Morphew
- Department of Life Sciences, Aberystwyth University, Wales, United Kingdom
| | - Nikki J. Marks
- School of Biological Sciences, Queen’s University Belfast, Northern Ireland, United Kingdom
| | - Aaron G. Maule
- School of Biological Sciences, Queen’s University Belfast, Northern Ireland, United Kingdom
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Abdellatif AAH, Scagnetti G, Younis MA, Bouazzaoui A, Tawfeek HM, Aldosari BN, Almurshedi AS, Alsharidah M, Rugaie OA, Davies MPA, Liloglou T, Ross K, Saleem I. Non-coding RNA-directed therapeutics in lung cancer: Delivery technologies and clinical applications. Colloids Surf B Biointerfaces 2023; 229:113466. [PMID: 37515959 DOI: 10.1016/j.colsurfb.2023.113466] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/28/2023] [Accepted: 07/16/2023] [Indexed: 07/31/2023]
Abstract
Lung cancer is one of the most aggressive and deadliest health threats. There has been an increasing interest in non-coding RNA (ncRNA) recently, especially in the areas of carcinogenesis and tumour progression. However, ncRNA-directed therapies are still encountering obstacles on their way to the clinic. In the present article, we provide an overview on the potential of targeting ncRNA in the treatment of lung cancer. Then, we discuss the delivery challenges and recent approaches enabling the delivery of ncRNA-directed therapies to the lung cancer cells, where we illuminate some advanced technologies including chemically-modified oligonucleotides, nuclear targeting, and three-dimensional in vitro models. Furthermore, advanced non-viral delivery systems recruiting nanoparticles, biomimetic delivery systems, and extracellular vesicles are also highlighted. Lastly, the challenges limiting the clinical trials on the therapeutic targeting of ncRNAs in lung cancer and future directions to tackle them are explored.
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Affiliation(s)
- Ahmed A H Abdellatif
- Department of Pharmaceutics, College of Pharmacy, Qassim University, Al Qassim 51452, Saudi Arabia; Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut 71524, Egypt.
| | - Giulia Scagnetti
- School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, James Parsons Building, Liverpool L3 3AF, UK
| | - Mahmoud A Younis
- Department of Industrial Pharmacy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Abdellatif Bouazzaoui
- Department of Medical Genetics, Faculty of Medicine, Umm Al-Qura University, Makkah 21955, Saudi Arabia; Science and Technology Unit, Umm Al-Qura University, Makkah 21955, Saudi Arabia; Medical Clinic, Hematology/Oncology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, Regensburg 93053, Germany
| | - Hesham M Tawfeek
- Department of Industrial Pharmacy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Basmah N Aldosari
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Alanood S Almurshedi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mansour Alsharidah
- Department of Physiology, College of Medicine, Qassim University, Buraydah 51452, Saudi Arabia
| | - Osamah Al Rugaie
- Department of Basic Medical Sciences, College of Medicine and Medical Sciences, Qassim University, P.O. Box 991, Unaizah, Al Qassim 51911, Saudi Arabia
| | - Michael P A Davies
- Department of Molecular and Clinical Cancer Medicine, Institute of Systems, Molecular & Integrative Biology, The University of Liverpool, UK
| | | | - Kehinde Ross
- School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, James Parsons Building, Liverpool L3 3AF, UK; Institute for Health Research, Liverpool John Moores University, Liverpool L3 3AF, UK
| | - Imran Saleem
- School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, James Parsons Building, Liverpool L3 3AF, UK; Institute for Health Research, Liverpool John Moores University, Liverpool L3 3AF, UK.
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Buthelezi LA, Pillay S, Ntuli NN, Gcanga L, Guler R. Antisense Therapy for Infectious Diseases. Cells 2023; 12:2119. [PMID: 37626929 PMCID: PMC10453568 DOI: 10.3390/cells12162119] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/15/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
Infectious diseases, particularly Tuberculosis (TB) caused by Mycobacterium tuberculosis, pose a significant global health challenge, with 1.6 million reported deaths in 2021, making it the most fatal disease caused by a single infectious agent. The rise of drug-resistant infectious diseases adds to the urgency of finding effective and safe intervention therapies. Antisense therapy uses antisense oligonucleotides (ASOs) that are short, chemically modified, single-stranded deoxyribonucleotide molecules complementary to their mRNA target. Due to their designed target specificity and inhibition of a disease-causing gene at the mRNA level, antisense therapy has gained interest as a potential therapeutic approach. This type of therapy is currently utilized in numerous diseases, such as cancer and genetic disorders. Currently, there are limited but steadily increasing studies available that report on the use of ASOs as treatment for infectious diseases. This review explores the sustainability of FDA-approved and preclinically tested ASOs as a treatment for infectious diseases and the adaptability of ASOs for chemical modifications resulting in reduced side effects with improved drug delivery; thus, highlighting the potential therapeutic uses of ASOs for treating infectious diseases.
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Affiliation(s)
- Lwanda Abonga Buthelezi
- International Centre for Genetic Engineering and Biotechnology, Cape Town Component, Cape Town 7925, South Africa; (L.A.B.); (S.P.); (N.N.N.); (L.G.)
- Department of Pathology, Division of Immunology, Institute of Infectious Diseases and Molecular Medicine (IDM), Faculty of Health Sciences, University of Cape Town, Cape Town 7925, South Africa
| | - Shandre Pillay
- International Centre for Genetic Engineering and Biotechnology, Cape Town Component, Cape Town 7925, South Africa; (L.A.B.); (S.P.); (N.N.N.); (L.G.)
- Department of Pathology, Division of Immunology, Institute of Infectious Diseases and Molecular Medicine (IDM), Faculty of Health Sciences, University of Cape Town, Cape Town 7925, South Africa
| | - Noxolo Nokukhanya Ntuli
- International Centre for Genetic Engineering and Biotechnology, Cape Town Component, Cape Town 7925, South Africa; (L.A.B.); (S.P.); (N.N.N.); (L.G.)
- Department of Pathology, Division of Immunology, Institute of Infectious Diseases and Molecular Medicine (IDM), Faculty of Health Sciences, University of Cape Town, Cape Town 7925, South Africa
| | - Lorna Gcanga
- International Centre for Genetic Engineering and Biotechnology, Cape Town Component, Cape Town 7925, South Africa; (L.A.B.); (S.P.); (N.N.N.); (L.G.)
- Department of Pathology, Division of Immunology, Institute of Infectious Diseases and Molecular Medicine (IDM), Faculty of Health Sciences, University of Cape Town, Cape Town 7925, South Africa
| | - Reto Guler
- International Centre for Genetic Engineering and Biotechnology, Cape Town Component, Cape Town 7925, South Africa; (L.A.B.); (S.P.); (N.N.N.); (L.G.)
- Department of Pathology, Division of Immunology, Institute of Infectious Diseases and Molecular Medicine (IDM), Faculty of Health Sciences, University of Cape Town, Cape Town 7925, South Africa
- Faculty of Health Sciences, Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town 7925, South Africa
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8
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Samad AFA, Kamaroddin MF. Innovative approaches in transforming microRNAs into therapeutic tools. WILEY INTERDISCIPLINARY REVIEWS. RNA 2023; 14:e1768. [PMID: 36437633 DOI: 10.1002/wrna.1768] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/06/2022] [Accepted: 11/08/2022] [Indexed: 11/29/2022]
Abstract
MicroRNA (miRNA) is regarded as a prominent genetic regulator, as it can fine-tune an entire biological pathway by targeting multiple target genes. This characteristic makes miRNAs promising therapeutic tools to reinstate cell functions that are disrupted as a consequence of diseases. Currently, miRNA replacement by miRNA mimics and miRNA inhibition by anti-miRNA oligonucleotides are the main approaches to utilizing miRNA molecules for therapeutic purposes. Nevertheless, miRNA-based therapeutics are hampered by major issues such as off-target effects, immunogenicity, and uncertain delivery platforms. Over the past few decades, several innovative approaches have been established to minimize off-target effects, reduce immunostimulation, and provide efficient transfer to the target cells in which these molecules exert their function. Recent achievements have led to the testing of miRNA-based drugs in clinical trials, and these molecules may become next-generation therapeutics for medical intervention. Despite the achievement of exciting milestones, the dosage of miRNA administration remains unclear, and ways to address this issue are proposed. Elucidating the current status of the main factors of therapeutic miRNA would allow further developments and innovations to achieve safe therapeutic tools. This article is categorized under: RNA in Disease and Development > RNA in Disease Regulatory RNAs/RNAi/Riboswitches > RNAi: Mechanisms of Action.
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Affiliation(s)
- Abdul Fatah A Samad
- Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
| | - Mohd Farizal Kamaroddin
- Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
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9
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The potential of RNA-based therapy for kidney diseases. Pediatr Nephrol 2023; 38:327-344. [PMID: 35507149 PMCID: PMC9066145 DOI: 10.1007/s00467-021-05352-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 10/29/2021] [Accepted: 10/29/2021] [Indexed: 01/10/2023]
Abstract
Inherited kidney diseases (IKDs) are a large group of disorders affecting different nephron segments, many of which progress towards kidney failure due to the absence of curative therapies. With the current advances in genetic testing, the understanding of the molecular basis and pathophysiology of these disorders is increasing and reveals new potential therapeutic targets. RNA has revolutionized the world of molecular therapy and RNA-based therapeutics have started to emerge in the kidney field. To apply these therapies for inherited kidney disorders, several aspects require attention. First, the mRNA must be combined with a delivery vehicle that protects the oligonucleotides from degradation in the blood stream. Several types of delivery vehicles have been investigated, including lipid-based, peptide-based, and polymer-based ones. Currently, lipid nanoparticles are the most frequently used formulation for systemic siRNA and mRNA delivery. Second, while the glomerulus and tubules can be reached by charge- and/or size-selectivity, delivery vehicles can also be equipped with antibodies, antibody fragments, targeting peptides, carbohydrates or small molecules to actively target receptors on the proximal tubule epithelial cells, podocytes, mesangial cells or the glomerular endothelium. Furthermore, local injection strategies can circumvent the sequestration of RNA formulations in the liver and physical triggers can also enhance kidney-specific uptake. In this review, we provide an overview of current and potential future RNA-based therapies and targeting strategies that are in development for kidney diseases, with particular interest in inherited kidney disorders.
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10
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Kumari N, Siddhanta K, Panja S, Joshi V, Jogdeo C, Kapoor E, Khan R, Kollala SS, Kumar B, Sil D, Singh AB, Murry DJ, Oupický D. Oral Delivery of Nucleic Acid Therapies for Local and Systemic Action. Pharm Res 2023; 40:107-122. [PMID: 36271204 PMCID: PMC9589866 DOI: 10.1007/s11095-022-03415-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/10/2022] [Indexed: 01/25/2023]
Abstract
Nucleic acid (NA) therapy has gained importance over the past decade due to its high degree of selectivity and minimal toxic effects over conventional drugs. Currently, intravenous (IV) or intramuscular (IM) formulations constitute majority of the marketed formulations containing nucleic acids. However, oral administration is traditionally preferred due to ease of administration as well as higher patient compliance. To leverage the benefits of oral delivery for NA therapy, the NA of interest must be delivered to the target site avoiding all degrading and inhibiting factors during its transition through the gastrointestinal tract. The oral route presents myriad of challenges to NA delivery, making formulation development challenging. Researchers in the last few decades have formulated various delivery systems to overcome such challenges and several reviews summarize and discuss these strategies in detail. However, there is a need to differentiate between the approaches based on target so that in future, delivery strategies can be developed according to the goal of the study and for efficient delivery to the desired site. The goal of this review is to summarize the mechanisms for target specific delivery, list and discuss the formulation strategies used for oral delivery of NA therapies and delineate the similarities and differences between local and systemic targeting oral delivery systems and current challenges.
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Affiliation(s)
- Neha Kumari
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198-6849, USA
| | - Kasturi Siddhanta
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198-6849, USA
| | - Sudipta Panja
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198-6849, USA
| | - Vineet Joshi
- Department of Pharmacy Practice and Science, University of Nebraska Medical Center, Omaha, NE, USA
| | - Chinmay Jogdeo
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198-6849, USA
| | - Ekta Kapoor
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198-6849, USA
| | - Rubayat Khan
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198-6849, USA
| | - Sai Sundeep Kollala
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, USA
| | - Balawant Kumar
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Diptesh Sil
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198-6849, USA
| | - Amar B Singh
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, USA
| | - Daryl J Murry
- Department of Pharmacy Practice and Science, University of Nebraska Medical Center, Omaha, NE, USA
| | - David Oupický
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198-6849, USA.
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11
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Supportive Oligonucleotide Therapy (SOT) as a Potential Treatment for Viral Infections and Lyme Disease: Preliminary Results. Infect Dis Rep 2022; 14:824-836. [PMID: 36412742 PMCID: PMC9680246 DOI: 10.3390/idr14060084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/27/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022] Open
Abstract
Antisense therapy is widely used as an alternative therapeutic option for various diseases. RNA interference might be effective in infections, through the degradation of messenger RNA and, therefore, translation process. Hence, proteins essential for microorganisms and viruses' proliferation and metabolism are inhibited, leading to their elimination. The present study aimed to evaluate the use of oligonucleotide in patients infected by Epstein-Barr (EBV) or Herpes Simplex Viruses 1/2 or with Lyme Disease caused by Borrelia burgdorferi. Blood samples were collected from 115 patients and the different species were characterized using molecular biology techniques. Then, SOT molecules (Supportive Oligonucleotide Therapy), which are specific small interfering RNA (siRNA), were designed, produced, and evaluated, for each specific strain. Oligonucleotides were administered intravenously to patients and then a quantitative Polymerase Chain Reaction was used to evaluate the effectiveness of SOT. This study revealed that for Lyme Disease, one or two SOT administrations can lead to a statistically significant decrease in DNA copies, while for viruses, two or three administrations are required to achieve a statistically significant reduction in the genetic material. These preliminary results indicate that antisense SOT therapy can be considered a potential treatment for viral as well as Lyme diseases.
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12
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Thakur S, Sinhari A, Jain P, Jadhav HR. A perspective on oligonucleotide therapy: Approaches to patient customization. Front Pharmacol 2022; 13:1006304. [PMID: 36339619 PMCID: PMC9626821 DOI: 10.3389/fphar.2022.1006304] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/05/2022] [Indexed: 09/12/2023] Open
Abstract
It is estimated that the human genome encodes 15% of proteins that are considered to be disease-modifying. Only 2% of these proteins possess a druggable site that the approved clinical candidates target. Due to this disparity, there is an immense need to develop therapeutics that may better mitigate the disease or disorders aroused by non-druggable and druggable proteins or enzymes. The recent surge in approved oligonucleotide therapeutics (OT) indicates the imminent potential of these therapies. Oligonucleotide-based therapeutics are of intermediate size with much-improved selectivity towards the target and fewer off-target effects than small molecules. The OTs include Antisense RNAs, MicroRNA (MIR), small interfering RNA (siRNA), and aptamers, which are currently being explored for their use in neurodegenerative disorders, cancer, and even orphan diseases. The present review is a congregated effort to present the past and present of OTs and the current efforts to make OTs for plausible future therapeutics. The review provides updated literature on the challenges and bottlenecks of OT and recent advancements in OT drug delivery. Further, this review deliberates on a newly emerging approach to personalized treatment for patients with rare and fatal diseases with OT.
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Affiliation(s)
- Shikha Thakur
- Pharmaceutical Chemistry Laboratory, Department of Pharmacy, Birla Institute of Technology and Sciences Pilani, Pilani, RJ, India
| | - Apurba Sinhari
- Pharmaceutical Chemistry Laboratory, Department of Pharmacy, Birla Institute of Technology and Sciences Pilani, Pilani, RJ, India
| | - Priti Jain
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi, India
| | - Hemant R. Jadhav
- Pharmaceutical Chemistry Laboratory, Department of Pharmacy, Birla Institute of Technology and Sciences Pilani, Pilani, RJ, India
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13
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Ning L, Liu M, Gou Y, Yang Y, He B, Huang J. Development and application of ribonucleic acid therapy strategies against COVID-19. Int J Biol Sci 2022; 18:5070-5085. [PMID: 35982905 PMCID: PMC9379410 DOI: 10.7150/ijbs.72706] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 07/16/2022] [Indexed: 11/17/2022] Open
Abstract
The Coronavirus disease 2019 (COVID-19) pandemic is caused by the severe acute respiratory syndrome 2 coronavirus (SARS-CoV-2), remaining a global health crisis since its outbreak until now. Advanced biotechnology and research findings have revealed many suitable viral and host targets for a wide range of therapeutic strategies. The emerging ribonucleic acid therapy can modulate gene expression by post-transcriptional gene silencing (PTGS) based on Watson-Crick base pairing. RNA therapies, including antisense oligonucleotides (ASO), ribozymes, RNA interference (RNAi), aptamers, etc., were used to treat SARS-CoV whose genome is similar to SARV-CoV-2, and the past experience also applies for the treatment of COVID-19. Several studies against SARS-CoV-2 based on RNA therapeutic strategy have been reported, and a dozen of relevant preclinical or clinical trials are in process globally. RNA therapy has been a very active and important part of COVID-19 treatment. In this review, we focus on the progress of ribonucleic acid therapeutic strategies development and application, discuss corresponding problems and challenges, and suggest new strategies and solutions.
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Affiliation(s)
- Lin Ning
- School of Healthcare Technology, Chengdu Neusoft University, Sichuan, China.,School of Life Science and Technology, University of Electronic Science and Technology of China, Sichuan, China
| | - Mujiexin Liu
- Ineye Hospital of Chengdu University of TCM, Sichuan, China
| | - Yushu Gou
- School of Life Science and Technology, University of Electronic Science and Technology of China, Sichuan, China
| | - Yue Yang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Sichuan, China
| | - Bifang He
- Medical College, Guizhou University, Guizhou, China
| | - Jian Huang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Sichuan, China
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14
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Barresi V, Musmeci C, Rinaldi A, Condorelli DF. Transcript-Targeted Therapy Based on RNA Interference and Antisense Oligonucleotides: Current Applications and Novel Molecular Targets. Int J Mol Sci 2022; 23:ijms23168875. [PMID: 36012138 PMCID: PMC9408055 DOI: 10.3390/ijms23168875] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/03/2022] [Accepted: 08/07/2022] [Indexed: 12/28/2022] Open
Abstract
The development of novel target therapies based on the use of RNA interference (RNAi) and antisense oligonucleotides (ASOs) is growing in an exponential way, challenging the chance for the treatment of the genetic diseases and cancer by hitting selectively targeted RNA in a sequence-dependent manner. Multiple opportunities are taking shape, able to remove defective protein by silencing RNA (e.g., Inclisiran targets mRNA of protein PCSK9, permitting a longer half-life of LDL receptors in heterozygous familial hypercholesteremia), by arresting mRNA translation (i.e., Fomivirsen that binds to UL123-RNA and blocks the translation into IE2 protein in CMV-retinitis), or by reactivating modified functional protein (e.g., Eteplirsen able to restore a functional shorter dystrophin by skipping the exon 51 in Duchenne muscular dystrophy) or a not very functional protein. In this last case, the use of ASOs permits modifying the expression of specific proteins by modulating splicing of specific pre-RNAs (e.g., Nusinersen acts on the splicing of exon 7 in SMN2 mRNA normally not expressed; it is used for spinal muscular atrophy) or by downregulation of transcript levels (e.g., Inotersen acts on the transthryretin mRNA to reduce its expression; it is prescribed for the treatment of hereditary transthyretin amyloidosis) in order to restore the biochemical/physiological condition and ameliorate quality of life. In the era of precision medicine, recently, an experimental splice-modulating antisense oligonucleotide, Milasen, was designed and used to treat an 8-year-old girl affected by a rare, fatal, progressive form of neurodegenerative disease leading to death during adolescence. In this review, we summarize the main transcriptional therapeutic drugs approved to date for the treatment of genetic diseases by principal regulatory government agencies and recent clinical trials aimed at the treatment of cancer. Their mechanism of action, chemical structure, administration, and biomedical performance are predominantly discussed.
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15
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Curreri A, Sankholkar D, Mitragotri S, Zhao Z. RNA therapeutics in the clinic. Bioeng Transl Med 2022; 8:e10374. [PMID: 36684099 PMCID: PMC9842029 DOI: 10.1002/btm2.10374] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/08/2022] [Indexed: 01/25/2023] Open
Abstract
Ribonucleic acid (RNA) therapeutics are being actively researched as a therapeutic modality in preclinical and clinical studies. They have become one of the most ubiquitously known and discussed therapeutics in recent years in part due to the ongoing coronavirus pandemic. Since the first approval in 1998, research on RNA therapeutics has progressed to discovering new therapeutic targets and delivery strategies to enhance their safety and efficacy. Here, we provide an overview of the current clinically relevant RNA therapeutics, mechanistic basis of their function, and strategies to improve their clinical use. We discuss the 17 approved RNA therapeutics and perform an in-depth analysis of the 222 ongoing clinical trials, with an emphasis on their respective mechanisms and disease areas. We also provide perspectives on the challenges for clinical translation of RNA therapeutics and suggest potential strategies to address these challenges.
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Affiliation(s)
- Alexander Curreri
- John A. Paulson School of Engineering and Applied SciencesHarvard UniversityCambridgeMassachusettsUSA,Wyss Institute for Biologically Inspired Engineering at Harvard UniversityBostonMassachusettsUSA
| | | | - Samir Mitragotri
- John A. Paulson School of Engineering and Applied SciencesHarvard UniversityCambridgeMassachusettsUSA,Wyss Institute for Biologically Inspired Engineering at Harvard UniversityBostonMassachusettsUSA
| | - Zongmin Zhao
- Department of Pharmaceutical Sciences, College of PharmacyUniversity of Illinois at ChicagoChicagoIllinoisUSA,University of Illinois Cancer CenterChicagoIllinoisUSA
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16
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Bergonzo C, Grishaev A, Bottaro S. Conformational heterogeneity of UCAAUC RNA oligonucleotide from molecular dynamics simulations, SAXS, and NMR experiments. RNA (NEW YORK, N.Y.) 2022; 28:937-946. [PMID: 35483823 PMCID: PMC9202585 DOI: 10.1261/rna.078888.121] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
We describe the conformational ensemble of the single-stranded r(UCAAUC) oligonucleotide obtained using extensive molecular dynamics (MD) simulations and Rosetta's FARFAR2 algorithm. The conformations observed in MD consist of A-form-like structures and variations thereof. These structures are not present in the pool generated using FARFAR2. By comparing with available nuclear magnetic resonance (NMR) measurements, we show that the presence of both A-form-like and other extended conformations is necessary to quantitatively explain experimental data. To further validate our results, we measure solution X-ray scattering (SAXS) data on the RNA hexamer and find that simulations result in more compact structures than observed from these experiments. The integration of simulations with NMR via a maximum entropy approach shows that small modifications to the MD ensemble lead to an improved description of the conformational ensemble. Nevertheless, we identify persisting discrepancies in matching experimental SAXS data.
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Affiliation(s)
- Christina Bergonzo
- National Institute of Standards and Technology and Institute for Bioscience and Biotechnology Research, Rockville, Maryland 20850, USA
| | - Alexander Grishaev
- National Institute of Standards and Technology and Institute for Bioscience and Biotechnology Research, Rockville, Maryland 20850, USA
| | - Sandro Bottaro
- Structural Biology and NMR Laboratory, Department of Biology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
- Department of Biomedical Sciences, Humanitas University, 20090 Pieve Emanuele, Italy
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17
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Migliorati JM, Liu S, Liu A, Gogate A, Nair S, Bahal R, Rasmussen TP, Manautou JE, Zhong XB. Absorption, Distribution, Metabolism, and Excretion of US Food and Drug Administration-Approved Antisense Oligonucleotide Drugs. Drug Metab Dispos 2022; 50:888-897. [PMID: 35221287 PMCID: PMC11022858 DOI: 10.1124/dmd.121.000417] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 02/22/2022] [Indexed: 04/19/2024] Open
Abstract
Absorption, distribution, metabolism, and excretion (ADME) are the key biologic processes for determination of a drug's pharmacokinetic parameters, which have direct impacts on efficacy and adverse drug reactions (ADRs). The chemical structures, dosage forms, and sites and routes of administration are the principal determinants of ADME profiles and consequent impacts on their efficacy and ADRs. Newly developed large molecule biologic antisense oligonucleotide (ASO) drugs have completely unique ADME that is not fully defined. ASO-based drugs are single-stranded synthetic antisense nucleic acids with diverse modes of drug actions from induction of mRNA degradation, exon skipping and restoration, and interactions with proteins. ASO drugs have a great potential to treat certain human diseases that have remained untreatable with small molecule-based drugs. The ADME of ASO drugs contributes to their unique set of ADRs and toxicity. In this review, to better understand their ADME, the 10 US Food and Drug Administration (FDA)-approved ASO drugs were selected: fomivirsen, pegaptanib, mipomersen, nusinersen, inotersen, defibrotide, eteplirsen, golodirsen, viltolarsen, and casimersen. A meta-analysis was conducted on their formulation, dosage, sites of administration, local and systematic distribution, metabolism, degradation, and excretion. Membrane permeabilization through endocytosis and nucleolytic degradation by endonucleases and exonucleases are major ADME features of the ASO drugs that differ from small-molecule drugs. The information summarized here provides comprehensive ADME characteristics of FDA-approved ASO drugs, leading to a better understanding of their therapeutic efficacy and their potential ADRs and toxicity. Numerous knowledge gaps, particularly on cellular uptake and subcellular trafficking and distribution, are identified, and future perspectives and directions are discussed. SIGNIFICANCE STATEMENT: Through a systematic analysis of the existing information of absorption, distribution, metabolism, and excretion (ADME) parameters for 10 US Food and Drug Administration (FDA)-approved antisense oligonucleotide (ASO) drugs, this review provides an overall view of the unique ADME characteristics of ASO drugs, which are distinct from small chemical drug ADME. This knowledge is useful for discovery and development of new ASO drugs as well as clinical use of current FDA-approved ASO drugs.
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Affiliation(s)
- Julia M Migliorati
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
| | - Sunna Liu
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
| | - Anna Liu
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
| | - Anagha Gogate
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
| | - Sreenidhi Nair
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
| | - Raman Bahal
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
| | - Theodore P Rasmussen
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
| | - José E Manautou
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
| | - Xiao-Bo Zhong
- Department of Pharmaceutical Sciences, School of Pharmacy (J.M.M., S.L., A.L., A.G., R.B., T.P.R., J.E.M., X.Z.) and Department of Molecular and Cell Biology (S.N.), University of Connecticut, Storrs, Connecticut
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18
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Alhamadani F, Zhang K, Parikh R, Wu H, Rasmussen TP, Bahal R, Zhong XB, Manautou JE. Adverse Drug Reactions and Toxicity of the Food and Drug Administration-Approved Antisense Oligonucleotide Drugs. Drug Metab Dispos 2022; 50:879-887. [PMID: 35221289 PMCID: PMC11022857 DOI: 10.1124/dmd.121.000418] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 02/14/2022] [Indexed: 04/19/2024] Open
Abstract
The market for large molecule biologic drugs has grown rapidly, including antisense oligonucleotide (ASO) drugs. ASO drugs work as single-stranded synthetic oligonucleotides that reduce production or alter functions of disease-causing proteins through various mechanisms, such as mRNA degradation, exon skipping, and ASO-protein interactions. Since the first ASO drug, fomivirsen, was approved in 1998, the U.S. Food and Drug Administration (FDA) has approved 10 ASO drugs to date. Although ASO drugs are efficacious in treating some diseases that are untargetable by small-molecule chemical drugs, concerns on adverse drug reactions (ADRs) and toxicity cannot be ignored. Illustrative of this, mipomersen was recently taken off the market due to its hepatotoxicity risk. This paper reviews ADRs and toxicity from FDA drug labeling, preclinical studies, clinical trials, and postmarketing real-world studies on the 10 FDA-approved ASO drugs, including fomivirsen and pegaptanib, mipomersen, nusinersen, inotersen, defibrotide, eteplirsen, golodirsen, viltolarsen, and casimersen. Unique and common ADRs and toxicity for each ASO drug are summarized here. The risk of developing hepatotoxicity, kidney toxicity, and hypersensitivity reactions co-exists for multiple ASO drugs. Special precautions need to be in place when certain ASO drugs are administrated. Further discussion is extended on studying the mechanisms of ADRs and toxicity of these drugs, evaluating the existing physiologic and pathologic states of patients, optimizing the dose and route of administration, and formulating personalized treatment plans to improve the clinical utility of FDA-approved ASO drugs and discovery and development of new ASO drugs with reduced ADRs. SIGNIFICANCE STATEMENT: The current review provides a comprehensive analysis of unique and common ADRs and the toxicity of FDA-approved ASO drugs. The information can help better manage the risk of severe hepatotoxicity, kidney toxicity, and hypersensitivity reactions in the usage of currently approved ASO drugs and the discovery and development of new and safer ASO drugs.
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Affiliation(s)
- Feryal Alhamadani
- Department of Pharmaceutical Sciences, School of Pharmacy (F.A., K.Z., H.W., T.P.R., R.B., X.Z., J.E.M.), and Department of Physiology and Neurobiology (R.P.), University of Connecticut, Storrs, Connecticut
| | - Kristy Zhang
- Department of Pharmaceutical Sciences, School of Pharmacy (F.A., K.Z., H.W., T.P.R., R.B., X.Z., J.E.M.), and Department of Physiology and Neurobiology (R.P.), University of Connecticut, Storrs, Connecticut
| | - Rajvi Parikh
- Department of Pharmaceutical Sciences, School of Pharmacy (F.A., K.Z., H.W., T.P.R., R.B., X.Z., J.E.M.), and Department of Physiology and Neurobiology (R.P.), University of Connecticut, Storrs, Connecticut
| | - Hangyu Wu
- Department of Pharmaceutical Sciences, School of Pharmacy (F.A., K.Z., H.W., T.P.R., R.B., X.Z., J.E.M.), and Department of Physiology and Neurobiology (R.P.), University of Connecticut, Storrs, Connecticut
| | - Theodore P Rasmussen
- Department of Pharmaceutical Sciences, School of Pharmacy (F.A., K.Z., H.W., T.P.R., R.B., X.Z., J.E.M.), and Department of Physiology and Neurobiology (R.P.), University of Connecticut, Storrs, Connecticut
| | - Raman Bahal
- Department of Pharmaceutical Sciences, School of Pharmacy (F.A., K.Z., H.W., T.P.R., R.B., X.Z., J.E.M.), and Department of Physiology and Neurobiology (R.P.), University of Connecticut, Storrs, Connecticut
| | - Xiao-Bo Zhong
- Department of Pharmaceutical Sciences, School of Pharmacy (F.A., K.Z., H.W., T.P.R., R.B., X.Z., J.E.M.), and Department of Physiology and Neurobiology (R.P.), University of Connecticut, Storrs, Connecticut
| | - José E Manautou
- Department of Pharmaceutical Sciences, School of Pharmacy (F.A., K.Z., H.W., T.P.R., R.B., X.Z., J.E.M.), and Department of Physiology and Neurobiology (R.P.), University of Connecticut, Storrs, Connecticut
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19
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Delivery of Oligonucleotides: Efficiency with Lipid Conjugation and Clinical Outcome. Pharmaceutics 2022; 14:pharmaceutics14020342. [PMID: 35214074 PMCID: PMC8879684 DOI: 10.3390/pharmaceutics14020342] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/24/2022] [Accepted: 01/27/2022] [Indexed: 11/21/2022] Open
Abstract
Oligonucleotides have shifted drug discovery into a new paradigm due to their ability to silence the genes and inhibit protein translation. Importantly, they can drug the un-druggable targets from the conventional small-molecule perspective. Unfortunately, poor cellular permeability and susceptibility to nuclease degradation remain as major hurdles for the development of oligonucleotide therapeutic agents. Studies of safe and effective delivery technique with lipid bioconjugates gains attention to resolve these issues. Our review article summarizes the physicochemical effect of well-studied hydrophobic moieties to enhance the cellular entry of oligonucleotides. The structural impacts of fatty acids, cholesterol, tocopherol, and squalene on cellular internalization and membrane penetration in vitro and in vivo were discussed first. The crucial assays for delivery evaluation within this section were analyzed sequentially. Next, we provided a few successful examples of lipid-conjugated oligonucleotides advanced into clinical studies for treating patients with different medical backgrounds. Finally, we pinpointed current limitations and outlooks in this research field along with opportunities to explore new modifications and efficacy studies.
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20
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Introduction and History of the Chemistry of Nucleic Acids Therapeutics. Methods Mol Biol 2022; 2434:3-31. [PMID: 35213007 PMCID: PMC7612508 DOI: 10.1007/978-1-0716-2010-6_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This introduction charts the history of the development of the major chemical modifications that have influenced the development of nucleic acids therapeutics focusing in particular on antisense oligonucleotide analogues carrying modifications in the backbone and sugar. Brief mention is made of siRNA development and other applications that have by and large utilized the same modifications. We also point out the pitfalls of the use of nucleic acids as drugs, such as their unwanted interactions with pattern recognition receptors, which can be mitigated by chemical modification or used as immunotherapeutic agents.
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21
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Gupta A, Andresen JL, Manan RS, Langer R. Nucleic acid delivery for therapeutic applications. Adv Drug Deliv Rev 2021; 178:113834. [PMID: 34492233 DOI: 10.1016/j.addr.2021.113834] [Citation(s) in RCA: 105] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/25/2021] [Accepted: 06/11/2021] [Indexed: 02/07/2023]
Abstract
Recent medical advances have exploited the ability to address a given disease at the underlying level of transcription and translation. These treatment paradigms utilize nucleic acids - including short interfering RNA (siRNA), microRNA (miRNA), antisense oligonucleotides (ASO), and messenger RNA (mRNA) - to achieve a desired outcome ranging from gene knockdown to induced expression of a selected target protein. Towards this end, numerous strategies for encapsulation or stabilization of various nucleic acid structures have been developed in order to achieve intracellular delivery. In this review, we discuss several therapeutic applications of nucleic acids directed towards specific diseases and tissues of interest, in particular highlighting recent technologies which have reached late-stage clinical trials and received FDA approval.
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Affiliation(s)
- Akash Gupta
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main Street, Cambridge, MA 02139, USA
| | - Jason L Andresen
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main Street, Cambridge, MA 02139, USA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Rajith S Manan
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main Street, Cambridge, MA 02139, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main Street, Cambridge, MA 02139, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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22
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Shadid M, Badawi M, Abulrob A. Antisense oligonucleotides: absorption, distribution, metabolism, and excretion. Expert Opin Drug Metab Toxicol 2021; 17:1281-1292. [PMID: 34643122 DOI: 10.1080/17425255.2021.1992382] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Antisense oligonucleotides (ASOs) have emerged as a promising novel drug modality that aims to address unmet medical needs. A record of six ASO drugs have been approved since 2016, and more candidates are in clinical development. ASOs are the most advanced class within the RNA-based therapeutics field. AREAS COVERED This review highlights the two major backbones that are currently used to build the most advanced ASO platforms - the phosphorodiamidate morpholino oligomers (PMOs) and the phosphorothioates (PSs). The absorption, distribution, metabolism, and excretion (ADME) properties of the PMO and PS platforms are discussed in detail. EXPERT OPINION Understanding the ADME properties of existing ASOs can foster further improvement of this cutting-edge therapy, thereby enabling researchers to safely develop ASO drugs and enhancing their ability to innovate. ABBREVIATIONS 2'-MOE, 2'-O-methoxyethyl; 2'PS, 2 modified PS; ADME, absorption, distribution, metabolism, and excretion; ASO, antisense oligonucleotide; AUC, area under the curve; BNA, bridged nucleic acid; CPP, cell-penetrating peptide; CMV, cytomegalovirus; CNS, central nervous system; CYP, cytochrome P; DDI, drug-drug interaction; DMD, Duchenne muscular dystrophy; FDA, Food and Drug Administration; GalNAc3, triantennary N-acetyl galactosamine; IT, intrathecal; IV, intravenous; LNA, locked nucleic acid; mRNA, messenger RNA; NA, not applicable; PBPK, physiologically based pharmacokinetics; PD, pharmacodynamic; PK, pharmacokinetic; PMO, phosphorodiamidate morpholino oligomer; PMOplus, PMOs with positionally specific positive molecular charges; PPMO, peptide-conjugated PMO; PS, phosphorothioate; SC, subcutaneous; siRNA, small-interfering RNA; SMA, spinal muscular atrophy.
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Affiliation(s)
- Mohammad Shadid
- Nonclinical Development, Sarepta Therapeutics, Inc, Cambridge, MA, USA
| | - Mohamed Badawi
- Clinical Pharmacology Fellow, Ohio State University, Columbus, OH, USA
| | - Abedelnasser Abulrob
- Senior Research Officer, Human Health Therapeutics Centre, Translational Bioscience, National Research Council Canada, Ottawa, Ontario, Canada.,Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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23
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Pandey M, Ojha D, Bansal S, Rode AB, Chawla G. From bench side to clinic: Potential and challenges of RNA vaccines and therapeutics in infectious diseases. Mol Aspects Med 2021; 81:101003. [PMID: 34332771 DOI: 10.1016/j.mam.2021.101003] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/27/2021] [Accepted: 07/16/2021] [Indexed: 12/14/2022]
Abstract
The functional and structural versatility of Ribonucleic acids (RNAs) makes them ideal candidates for overcoming the limitations imposed by small molecule-based drugs. Hence, RNA-based biopharmaceuticals such as messenger RNA (mRNA) vaccines, antisense oligonucleotides (ASOs), small interfering RNAs (siRNAs), microRNA mimics, anti-miRNA oligonucleotides (AMOs), aptamers, riboswitches, and CRISPR-Cas9 are emerging as vital tools for the treatment and prophylaxis of many infectious diseases. Some of the major challenges to overcome in the area of RNA-based therapeutics have been the instability of single-stranded RNAs, delivery to the diseased cell, and immunogenicity. However, recent advancements in the delivery systems of in vitro transcribed mRNA and chemical modifications for protection against nucleases and reducing the toxicity of RNA have facilitated the entry of several exogenous RNAs into clinical trials. In this review, we provide an overview of RNA-based vaccines and therapeutics, their production, delivery, current advancements, and future translational potential in treating infectious diseases.
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Affiliation(s)
- Manish Pandey
- RNA Biology Laboratory, Regional Centre for Biotechnology, Faridabad, 121001, India
| | - Divya Ojha
- Laboratory of Synthetic Biology, Regional Centre for Biotechnology, Faridabad, 121001, India
| | - Sakshi Bansal
- RNA Biology Laboratory, Regional Centre for Biotechnology, Faridabad, 121001, India
| | - Ambadas B Rode
- Laboratory of Synthetic Biology, Regional Centre for Biotechnology, Faridabad, 121001, India.
| | - Geetanjali Chawla
- RNA Biology Laboratory, Regional Centre for Biotechnology, Faridabad, 121001, India.
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24
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The evolution of commercial drug delivery technologies. Nat Biomed Eng 2021; 5:951-967. [PMID: 33795852 DOI: 10.1038/s41551-021-00698-w] [Citation(s) in RCA: 415] [Impact Index Per Article: 138.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 02/11/2021] [Indexed: 02/07/2023]
Abstract
Drug delivery technologies have enabled the development of many pharmaceutical products that improve patient health by enhancing the delivery of a therapeutic to its target site, minimizing off-target accumulation and facilitating patient compliance. As therapeutic modalities expanded beyond small molecules to include nucleic acids, peptides, proteins and antibodies, drug delivery technologies were adapted to address the challenges that emerged. In this Review Article, we discuss seminal approaches that led to the development of successful therapeutic products involving small molecules and macromolecules, identify three drug delivery paradigms that form the basis of contemporary drug delivery and discuss how they have aided the initial clinical successes of each class of therapeutic. We also outline how the paradigms will contribute to the delivery of live-cell therapies.
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25
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Tompa DR, Immanuel A, Srikanth S, Kadhirvel S. Trends and strategies to combat viral infections: A review on FDA approved antiviral drugs. Int J Biol Macromol 2021; 172:524-541. [PMID: 33454328 PMCID: PMC8055758 DOI: 10.1016/j.ijbiomac.2021.01.076] [Citation(s) in RCA: 86] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/10/2021] [Accepted: 01/12/2021] [Indexed: 12/12/2022]
Abstract
The infectious microscopic viruses invade living cells to reproduce themselves, and causes chronic infections such as HIV/AIDS, hepatitis B and C, flu, etc. in humans which may lead to death if not treated. Different strategies have been utilized to develop new and superior antiviral drugs to counter the viral infections. The FDA approval of HIV nucleoside reverse transcriptase inhibitor, zidovudine in 1987 boosted the development of antiviral agents against different viruses. Currently, there are a number of combination drugs developed against various viral infections to arrest the activity of same or different viral macromolecules at multiple stages of its life cycle; among which majority are targeted to interfere with the replication of viral genome. Besides these, other type of antiviral molecules includes entry inhibitors, integrase inhibitors, protease inhibitors, interferons, immunomodulators, etc. The antiviral drugs can be toxic to human cells, particularly in case of administration of combination drugs, and on the other hand viruses can grow resistant to the antiviral drugs. Furthermore, emergence of new viruses like Ebola, coronaviruses (SARS-CoV, SARS-CoV-2) emphasizes the need for more innovative strategies to develop better antiviral drugs to fight the existing and the emerging viral infections. Hence, we reviewed the strategic enhancements in developing antiviral drugs for the treatment of different viral infections over the years.
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Affiliation(s)
- Dharma Rao Tompa
- Biomolecular Crystallography Laboratory, Department of Bioinformatics, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Aruldoss Immanuel
- Biomolecular Crystallography Laboratory, Department of Bioinformatics, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Srimari Srikanth
- Biomolecular Crystallography Laboratory, Department of Bioinformatics, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Saraboji Kadhirvel
- Biomolecular Crystallography Laboratory, Department of Bioinformatics, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India.
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Abstract
Research and drug development concerning rare diseases are at the cutting edge of scientific technology. To date, over 7,000 rare diseases have been identified. Despite their individual rarity, 1 in 10 individuals worldwide is affected by a rare condition. For the majority of these diseases, there is no treatment, much less cure; therefore, there is an urgent need for new therapies to extend and improve quality of life for persons who suffer from them. Here we focus specifically on rare neuromuscular diseases. Currently, genetic medicines using short antisense oligonucleotides (ASO) or small interfering ribonucleic acids that target RNA transcripts are achieving spectacular success in treating these diseases. For Duchenne muscular dystrophy (DMD), the state-of-the-art is an exon skipping therapy using an antisense oligonucleotide, which is prototypical of advanced precision medicines. Very recently, golodirsen and viltolarsen, for treatment of DMD patients amenable to skipping exon 53, have been approved by regulatory agencies in the USA and Japan, respectively. Here, we review scientific and clinical progress in developing new oligonucleotide therapeutics for selected rare neuromuscular diseases, discussing their efficacy and limitations.
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Affiliation(s)
- Yoshitsugu Aoki
- Department of Molecular Therapy, National Institute of Neuroscience, National Centre of Neurology and Psychiatry, Kodaira-shi, Tokyo, Japan
| | - Matthew J.A. Wood
- Department of Paediatrics, University of Oxford, Oxford, UK
- Oxford Harrington Rare Disease Centre, University of Oxford, John Radcliffe Hospital, Oxford, UK
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27
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Chen S, Sbuh N, Veedu RN. Antisense Oligonucleotides as Potential Therapeutics for Type 2 Diabetes. Nucleic Acid Ther 2020; 31:39-57. [PMID: 33026966 DOI: 10.1089/nat.2020.0891] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Type 2 diabetes (T2D) is a chronic metabolic disorder characterized by persistent hyperglycemia resulting from inefficient signaling and insufficient production of insulin. Conventional management of T2D has largely relied on small molecule-based oral hypoglycemic medicines, which do not halt the progression of the disease due to limited efficacy and induce adverse effects as well. To this end, antisense oligonucleotide has attracted immense attention in developing antidiabetic agents because of their ability to downregulate the expression of disease-causing genes at the RNA and protein level. To date, seven antisense agents have been approved by the United States Food and Drug Administration for therapies of a variety of human maladies, including genetic disorders. Herein, we provide a comprehensive review of antisense molecules developed for suppressing the causative genes believed to be responsible for insulin resistance and hyperglycemia toward preventing and treating T2D.
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Affiliation(s)
- Suxiang Chen
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, Australia.,Perron Institute for Neurological and Translational Science, Perth, Australia
| | - Nabayet Sbuh
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, Australia.,Perron Institute for Neurological and Translational Science, Perth, Australia
| | - Rakesh N Veedu
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, Australia.,Perron Institute for Neurological and Translational Science, Perth, Australia
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28
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Glazier DA, Liao J, Roberts BL, Li X, Yang K, Stevens CM, Tang W. Chemical Synthesis and Biological Application of Modified Oligonucleotides. Bioconjug Chem 2020; 31:1213-1233. [PMID: 32227878 DOI: 10.1021/acs.bioconjchem.0c00060] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
RNA plays a myriad of roles in the body including the coding, decoding, regulation, and expression of genes. RNA oligonucleotides have garnered significant interest as therapeutics via antisense oligonucleotides or small interfering RNA strategies for the treatment of diseases ranging from hyperlipidemia, HCV, and others. Additionally, the recently developed CRISPR-Cas9 mediated gene editing strategy also relies on Cas9-associated RNA strands. However, RNA presents numerous challenges as both a synthetic target and a potential therapeutic. RNA is inherently unstable, difficult to deliver into cells, and potentially immunogenic by itself or upon modification. Despite these challenges, with the help of chemically modified oligonucleotides, multiple RNA-based drugs have been approved by the FDA. The progress is made possible due to the nature of chemically modified oligonucleotides bearing advantages of nuclease stability, stronger binding affinity, and some other unique properties. This review will focus on the chemical synthesis of RNA and its modified versions. How chemical modifications of the ribose units and of the phosphatediester backbone address the inherent issues with using native RNA for biological applications will be discussed along the way.
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Affiliation(s)
- Daniel A Glazier
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.,Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Junzhuo Liao
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Brett L Roberts
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Xiaolei Li
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Ka Yang
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Christopher M Stevens
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Weiping Tang
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States.,Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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29
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Digitizable therapeutics for decentralized mitigation of global pandemics. Sci Rep 2019; 9:14345. [PMID: 31586137 PMCID: PMC6778202 DOI: 10.1038/s41598-019-50553-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 09/15/2019] [Indexed: 01/31/2023] Open
Abstract
When confronted with a globally spreading epidemic, we seek efficient strategies for drug dissemination, creating a competition between supply and demand at a global scale. Propagating along similar networks, e.g., air-transportation, the spreading dynamics of the supply vs. the demand are, however, fundamentally different, with the pathogens driven by contagion dynamics, and the drugs by commodity flow. We show that these different dynamics lead to intrinsically distinct spreading patterns: while viruses spread homogeneously across all destinations, creating a concurrent global demand, commodity flow unavoidably leads to a highly uneven spread, in which selected nodes are rapidly supplied, while the majority remains deprived. Consequently, even under ideal conditions of extreme production and shipping capacities, due to the inherent heterogeneity of network-based commodity flow, efficient mitigation becomes practically unattainable, as homogeneous demand is met by highly heterogeneous supply. Therefore, we propose here a decentralized mitigation strategy, based on local production and dissemination of therapeutics, that, in effect, bypasses the existing distribution networks. Such decentralization is enabled thanks to the recent development of digitizable therapeutics, based on, e.g., short DNA sequences or printable chemical compounds, that can be distributed as digital sequence files and synthesized on location via DNA/3D printing technology. We test our decentralized mitigation under extremely challenging conditions, such as suppressed local production rates or low therapeutic efficacy, and find that thanks to its homogeneous nature, it consistently outperforms the centralized alternative, saving many more lives with significantly less resources.
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30
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Shahryari A, Saghaeian Jazi M, Mohammadi S, Razavi Nikoo H, Nazari Z, Hosseini ES, Burtscher I, Mowla SJ, Lickert H. Development and Clinical Translation of Approved Gene Therapy Products for Genetic Disorders. Front Genet 2019; 10:868. [PMID: 31608113 PMCID: PMC6773888 DOI: 10.3389/fgene.2019.00868] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 08/20/2019] [Indexed: 02/05/2023] Open
Abstract
The field of gene therapy is striving more than ever to define a path to the clinic and the market. Twenty gene therapy products have already been approved and over two thousand human gene therapy clinical trials have been reported worldwide. These advances raise great hope to treat devastating rare and inherited diseases as well as incurable illnesses. Understanding of the precise pathomechanisms of diseases as well as the development of efficient and specific gene targeting and delivery tools are revolutionizing the global market. Currently, human cancers and monogenic disorders are indications number one. The elevated prevalence of genetic disorders and cancers, clear gene manipulation guidelines and increasing financial support for gene therapy in clinical trials are major trends. Gene therapy is presently starting to become commercially profitable as a number of gene and cell-based gene therapy products have entered the market and the clinic. This article reviews the history and development of twenty approved human gene and cell-based gene therapy products that have been approved up-to-now in clinic and markets of mainly North America, Europe and Asia.
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Affiliation(s)
- Alireza Shahryari
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany
- Stem Cell Research Center, Golestan University of Medical Sciences, Gorgan, Iran
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Marie Saghaeian Jazi
- Stem Cell Research Center, Golestan University of Medical Sciences, Gorgan, Iran
- Metabolic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Saeed Mohammadi
- Stem Cell Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Hadi Razavi Nikoo
- Infectious Disease Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Zahra Nazari
- Department of Biology, School of Basic Sciences, Golestan University, Gorgan, Iran
| | - Elaheh Sadat Hosseini
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Ingo Burtscher
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany
| | - Seyed Javad Mowla
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Heiko Lickert
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany
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31
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Bosgra S, Sipkens J, de Kimpe S, den Besten C, Datson N, van Deutekom J. The Pharmacokinetics of 2'- O-Methyl Phosphorothioate Antisense Oligonucleotides: Experiences from Developing Exon Skipping Therapies for Duchenne Muscular Dystrophy. Nucleic Acid Ther 2019; 29:305-322. [PMID: 31429628 DOI: 10.1089/nat.2019.0805] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Delivery to the target site and adversities related to off-target exposure have made the road to clinical success and approval of antisense oligonucleotide (AON) therapies challenging. Various classes of AONs have distinct chemical features and pharmacological properties. Understanding the similarities and differences in pharmacokinetics (PKs) among AON classes is important to make future development more efficient and may facilitate regulatory guidance of AON development programs. For the class of 2'-O-methyl phosphorothioate (2OMe PS) RNA AONs, most nonclinical and clinical PK data available today are derived from development of exon skipping therapies for Duchenne muscular dystrophy (DMD). While some publications have featured PK aspects of these AONs, no comprehensive overview is available to date. This article presents a detailed review of absorption, distribution, metabolism, and excretion of 2OMe PS AONs, compiled from publicly available data and previously unpublished internal data on drisapersen and related exon skipping candidates in preclinical species and DMD patients. Considerations regarding drug-drug interactions, toxicokinetics, and pharmacodynamics are also discussed. From the data presented, the picture emerges of consistent PK properties within the 2OMe PS class, predictable behavior across species, and a considerable overlap with other single-stranded PS AONs. A level of detail on muscle as a target tissue is provided, which was not previously available. Furthermore, muscle biopsy samples taken in DMD clinical trials allowed confirmation of the applicability of interspecies scaling approaches commonly applied in the absence of clinical target tissue data.
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32
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Moon SB, Kim DY, Ko JH, Kim JS, Kim YS. Improving CRISPR Genome Editing by Engineering Guide RNAs. Trends Biotechnol 2019; 37:870-881. [PMID: 30846198 DOI: 10.1016/j.tibtech.2019.01.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/29/2019] [Accepted: 01/30/2019] [Indexed: 12/26/2022]
Abstract
CRISPR technology is a two-component gene editing system in which the effector protein induces genetic alterations with the aid of a gene targeting guide RNA. Guide RNA can be produced through chemical synthesis, in vitro transcription, or intracellular transcription. Guide RNAs can be engineered to have chemical modifications, alterations in the spacer length, sequence modifications, fusion of RNA or DNA components, and incorporation of deoxynucleotides. Engineered guide RNA can improve genome editing efficiency and target specificity, regulation of biological toxicity, sensitive and specific molecular imaging, multiplexing, and editing flexibility. Therefore, engineered guide RNA will enable more specific, efficient, and safe gene editing, ultimately improving the clinical benefits of gene therapy.
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Affiliation(s)
- Su Bin Moon
- Genome Editing Research Center, KRIBB, Daejeon, Republic of Korea; KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Republic of Korea; These authors contributed equally to this work
| | - Do Yon Kim
- Genome Editing Research Center, KRIBB, Daejeon, Republic of Korea; KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Republic of Korea; These authors contributed equally to this work
| | - Jeong-Heon Ko
- Genome Editing Research Center, KRIBB, Daejeon, Republic of Korea; KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Republic of Korea
| | - Jin-Soo Kim
- Center for Genome Engineering, Institute for Basic Science, Daejeon, Republic of Korea; IBS School, Korea University of Science and Technology (UST), Daejeon, Republic of Korea; Department of Chemistry, Seoul National University, Seoul, Republic of Korea
| | - Yong-Sam Kim
- Genome Editing Research Center, KRIBB, Daejeon, Republic of Korea; KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Republic of Korea.
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33
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Nishikawa M, Tan M, Liao W, Kusamori K. Nanostructured DNA for the delivery of therapeutic agents. Adv Drug Deliv Rev 2019; 147:29-36. [PMID: 31614168 DOI: 10.1016/j.addr.2019.09.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 09/25/2019] [Accepted: 09/25/2019] [Indexed: 01/16/2023]
Abstract
DNA and RNA, the nucleic acids found in every living organism, are quite crucial, because not only do they store the genetic information, but also they are used as signals through interaction with various molecules within the body. The nature of nucleic acids, especially DNA, to form double-helix makes it possible to design nucleic acid-based nanostructures with various shapes. Because the shapes as well as the physicochemical properties determine their interaction with proteins or cells, nanostructured DNAs will have different features in the interaction compared with single- or double-stranded DNA. Some of these unique features of nanostructured DNA make ways for efficient delivery of therapeutic agents to specific targets. In this review, we begin with the factors affecting the properties of nanostructured DNA, followed by summarizing the methods for the development of nanostructured DNA. Further, we discuss the characteristics of nanostructured DNA and their applications for the delivery of bioactive compounds.
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Affiliation(s)
- Makiya Nishikawa
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Japan.
| | - Mengmeng Tan
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Japan; Graduate School of Pharmaceutical Sciences, Kyoto University, Japan
| | - Wenqing Liao
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Japan; Graduate School of Pharmaceutical Sciences, Kyoto University, Japan
| | - Kosuke Kusamori
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Japan
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34
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Wang L, Jiang S, Deng Z, Dedon PC, Chen S. DNA phosphorothioate modification-a new multi-functional epigenetic system in bacteria. FEMS Microbiol Rev 2019; 43:109-122. [PMID: 30289455 PMCID: PMC6435447 DOI: 10.1093/femsre/fuy036] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/03/2018] [Indexed: 12/20/2022] Open
Abstract
Synthetic phosphorothioate (PT) internucleotide linkages, in which a nonbridging oxygen is replaced by a sulphur atom, share similar physical and chemical properties with phosphodiesters but confer enhanced nuclease tolerance on DNA/RNA, making PTs a valuable biochemical and pharmacological tool. Interestingly, PT modification was recently found to occur naturally in bacteria in a sequence-selective and RP configuration-specific manner. This oxygen-sulphur swap is catalysed by the gene products of dndABCDE, which constitute a defence barrier with DndFGH in some bacterial strains that can distinguish and attack non-PT-modified foreign DNA, resembling DNA methylation-based restriction-modification (R-M) systems. Despite their similar defensive mechanisms, PT- and methylation-based R-M systems have evolved to target different consensus contexts in the host cell because when they share the same recognition sequences, the protective function of each can be impeded. The redox and nucleophilic properties of PT sulphur render PT modification a versatile player in the maintenance of cellular redox homeostasis, epigenetic regulation and environmental fitness. The widespread presence of dnd systems is considered a consequence of extensive horizontal gene transfer, whereas the lability of PT during oxidative stress and the susceptibility of PT to PT-dependent endonucleases provide possible explanations for the ubiquitous but sporadic distribution of PT modification in the bacterial world.
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Affiliation(s)
- Lianrong Wang
- Zhongnan Hospital, Wuhan University, 169 Donghu Road, Wuhan 430071, China.,Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, China
| | - Susu Jiang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, China
| | - Zixin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, China
| | - Peter C Dedon
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Masschusetts Avenue, Cambridge, Massachusetts, USA
| | - Shi Chen
- Zhongnan Hospital, Wuhan University, 169 Donghu Road, Wuhan 430071, China.,Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, China
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35
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Advances in the Understanding of Skin Cancer: Ultraviolet Radiation, Mutations, and Antisense Oligonucleotides as Anticancer Drugs. Molecules 2019; 24:molecules24081516. [PMID: 30999681 PMCID: PMC6514765 DOI: 10.3390/molecules24081516] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/13/2019] [Accepted: 04/15/2019] [Indexed: 12/15/2022] Open
Abstract
Skin cancer has always been and remains the leader among all tumors in terms of occurrence. One of the main factors responsible for skin cancer, natural and artificial UV radiation, causes the mutations that transform healthy cells into cancer cells. These mutations inactivate apoptosis, an event required to avoid the malignant transformation of healthy cells. Among these deadliest of cancers, melanoma and its ‘younger sister’, Merkel cell carcinoma, are the most lethal. The heavy toll of skin cancers stems from their rapid progression and the fact that they metastasize easily. Added to this is the difficulty in determining reliable margins when excising tumors and the lack of effective chemotherapy. Possibly the biggest problem posed by skin cancer is reliably detecting the extent to which cancer cells have spread throughout the body. The initial tumor is visible and can be removed, whereas metastases are invisible to the naked eye and much harder to eliminate. In our opinion, antisense oligonucleotides, which can be used in the form of targeted ointments, provide real hope as a treatment that will eliminate cancer cells near the tumor focus both before and after surgery.
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36
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Application of Locked Nucleic Acid Oligonucleotides for siRNA Preclinical Bioanalytics. Sci Rep 2019; 9:3566. [PMID: 30837588 PMCID: PMC6401054 DOI: 10.1038/s41598-019-40187-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 02/06/2019] [Indexed: 12/21/2022] Open
Abstract
Despite the exquisite potential of siRNA as a therapeutic, the mechanism(s) responsible for the robust indirect exposure-response relationships have not been fully elucidated. To understand the siRNA properties linked to potent activity, requires the disposition of siRNA to be characterized. A technical challenge in the characterization is the detection and quantitation of siRNA from biological samples. Described herein, a Locked Nucleic Acid (LNA) Hybridization-Ligation ECL ELISA was designed for ultra-sensitive quantification of both sense and antisense strands of siRNA independent of structural modifica-tions. This assay was applied to measure siRNA in serum and tissue homogenate in preclinical species. We observed rapid clearance of siRNA from the systemic circulation which contrasted the prolonged accumulation within the tissue. The assay was also able to distinguish and quantify free siRNA from RNA-induced silencing complex (RISC) and Argonaute 2 (Ago2) associated with therapeutic siRNA. We utilized an orthogonal method, LC-MS, to investigate 3′ exonuclease activity toward the antisense strand metabolism. Taken together, we have demonstrated that the LNA Hybridization-Ligation ECL ELISA is arobust analytical method with direct application to measuring the exposure of siRNA therapeutics seamlessly across biological matrices.
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37
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Britt WJ, Prichard MN. New therapies for human cytomegalovirus infections. Antiviral Res 2018; 159:153-174. [PMID: 30227153 DOI: 10.1016/j.antiviral.2018.09.003] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/28/2018] [Accepted: 09/07/2018] [Indexed: 02/07/2023]
Abstract
The recent approval of letermovir marks a new era of therapy for human cytomegalovirus (HCMV) infections, particularly for the prevention of HCMV disease in hematopoietic stem cell transplant recipients. For almost 30 years ganciclovir has been the therapy of choice for these infections and by today's standards this drug exhibits only modest antiviral activity that is often insufficient to completely suppress viral replication, and drives the selection of drug-resistant variants that continue to replicate and contribute to disease. While ganciclovir remains the therapy of choice, additional drugs that inhibit novel molecular targets, such as letermovir, will be required as highly effective combination therapies are developed not only for the treatment of immunocompromised hosts, but also for congenitally infected infants. Sustained efforts, largely in the biotech industry and academia, have identified additional highly active lead compounds that have progressed into clinical studies with varying levels of success and at least two have the potential to be approved in the near future. Some of the new drugs in the pipeline inhibit new molecular targets, remain effective against isolates that have developed resistance to existing therapies, and promise to augment existing therapeutic regimens. Here, we will describe some of the unique features of HCMV biology and discuss their effect on therapeutic needs. Existing drugs will also be discussed and some of the more promising candidates will be reviewed with an emphasis on those progressing through clinical studies. The in vitro and in vivo antiviral activity, spectrum of antiviral activity, and mechanism of action of new compounds will be reviewed to provide an update on potential new therapies for HCMV infections that have progressed significantly in recent years.
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Affiliation(s)
- William J Britt
- Department of Pediatrics, University of Alabama School of Medicine, Birmingham AL 35233-1711, USA
| | - Mark N Prichard
- Department of Pediatrics, University of Alabama School of Medicine, Birmingham AL 35233-1711, USA.
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38
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Dulla K, Aguila M, Lane A, Jovanovic K, Parfitt DA, Schulkens I, Chan HL, Schmidt I, Beumer W, Vorthoren L, Collin RWJ, Garanto A, Duijkers L, Brugulat-Panes A, Semo M, Vugler AA, Biasutto P, Adamson P, Cheetham ME. Splice-Modulating Oligonucleotide QR-110 Restores CEP290 mRNA and Function in Human c.2991+1655A>G LCA10 Models. MOLECULAR THERAPY. NUCLEIC ACIDS 2018; 12:730-740. [PMID: 30114557 PMCID: PMC6092551 DOI: 10.1016/j.omtn.2018.07.010] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 07/18/2018] [Accepted: 07/18/2018] [Indexed: 12/11/2022]
Abstract
Leber congenital amaurosis type 10 (LCA10) is a severe inherited retinal dystrophy associated with mutations in CEP290. The deep intronic c.2991+1655A>G mutation in CEP290 is the most common mutation in LCA10 individuals and represents an ideal target for oligonucleotide therapeutics. Here, a panel of antisense oligonucleotides was designed to correct the splicing defect associated with the mutation and screened for efficacy and safety. This identified QR-110 as the best-performing molecule. QR-110 restored wild-type CEP290 mRNA and protein expression levels in CEP290 c.2991+1655A>G homozygous and compound heterozygous LCA10 primary fibroblasts. Furthermore, in homozygous three-dimensional iPSC-derived retinal organoids, QR-110 showed a dose-dependent restoration of mRNA and protein function, as measured by percentage and length of photoreceptor cilia, without off-target effects. Localization studies in wild-type mice and rabbits showed that QR-110 readily reached all retinal layers, with an estimated half-life of 58 days. It was well tolerated following intravitreal injection in monkeys. In conclusion, the pharmacodynamic, pharmacokinetic, and safety properties make QR-110 a promising candidate for treating LCA10, and clinical development is currently ongoing.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Rob W J Collin
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Alejandro Garanto
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Lonneke Duijkers
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | | | | | | | | | - Peter Adamson
- ProQR Therapeutics, Leiden, the Netherlands; UCL Institute of Ophthalmology, London, UK.
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Stewart MP, Langer R, Jensen KF. Intracellular Delivery by Membrane Disruption: Mechanisms, Strategies, and Concepts. Chem Rev 2018; 118:7409-7531. [PMID: 30052023 PMCID: PMC6763210 DOI: 10.1021/acs.chemrev.7b00678] [Citation(s) in RCA: 380] [Impact Index Per Article: 63.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Intracellular delivery is a key step in biological research and has enabled decades of biomedical discoveries. It is also becoming increasingly important in industrial and medical applications ranging from biomanufacture to cell-based therapies. Here, we review techniques for membrane disruption-based intracellular delivery from 1911 until the present. These methods achieve rapid, direct, and universal delivery of almost any cargo molecule or material that can be dispersed in solution. We start by covering the motivations for intracellular delivery and the challenges associated with the different cargo types-small molecules, proteins/peptides, nucleic acids, synthetic nanomaterials, and large cargo. The review then presents a broad comparison of delivery strategies followed by an analysis of membrane disruption mechanisms and the biology of the cell response. We cover mechanical, electrical, thermal, optical, and chemical strategies of membrane disruption with a particular emphasis on their applications and challenges to implementation. Throughout, we highlight specific mechanisms of membrane disruption and suggest areas in need of further experimentation. We hope the concepts discussed in our review inspire scientists and engineers with further ideas to improve intracellular delivery.
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Affiliation(s)
- Martin P. Stewart
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
- The Koch Institute for Integrative Cancer Research,
Massachusetts Institute of Technology, Cambridge, USA
| | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
- The Koch Institute for Integrative Cancer Research,
Massachusetts Institute of Technology, Cambridge, USA
| | - Klavs F. Jensen
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
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Oberemok VV, Laikova KV, Repetskaya AI, Kenyo IM, Gorlov MV, Kasich IN, Krasnodubets AM, Gal'chinsky NV, Fomochkina II, Zaitsev AS, Bekirova VV, Seidosmanova EE, Dydik KI, Meshcheryakova AO, Nazarov SA, Smagliy NN, Chelengerova EL, Kulanova AA, Deri K, Subbotkin MV, Useinov RZ, Shumskykh MN, Kubyshkin AV. A Half-Century History of Applications of Antisense Oligonucleotides in Medicine, Agriculture and Forestry: We Should Continue the Journey. Molecules 2018; 23:E1302. [PMID: 29844255 PMCID: PMC6099785 DOI: 10.3390/molecules23061302] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 05/25/2018] [Accepted: 05/27/2018] [Indexed: 02/07/2023] Open
Abstract
Antisense oligonucleotides (ASO), short single-stranded polymers based on DNA or RNA chemistries and synthesized in vitro, regulate gene expression by binding in a sequence-specific manner to an RNA target. The functional activity and selectivity in the action of ASOs largely depends on the combination of nitrogenous bases in a target sequence. This simple and natural property of nucleic acids provides an attractive route by which scientists can create different ASO-based techniques. Over the last 50 years, planned and realized applications in the field of antisense and nucleic acid nanotechnologies have produced astonishing results and posed new challenges for further developments, exemplifying the essence of the post-genomic era. Today the majority of ASOs are chemically modified and/or incorporated within nanoparticles to enhance their stability and cellular uptake. This review critically analyzes some successful cases using the antisense approach in medicine to address severe diseases, such as Duchenne muscular dystrophy and spinal muscular atrophy, and suggests some prospective directions for future research. We also examine in detail the elaboration of unmodified insect-specific DNA insecticides and RNA preparations in the areas of agriculture and forestry, a relatively new branch of ASO that allows circumvention of the use of non-selective chemical insecticides. When considering the variety of successful ASO modifications with an efficient signal-to-noise ratio of action, coupled with the affordability of in vitro oligonucleotide synthesis and post-synthesis procedures, we predict that the next half-century will produce a fruitful yield of tools created from effective ASO-based end products.
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MESH Headings
- Agriculture/methods
- Animals
- Biological Control Agents/chemical synthesis
- Biological Control Agents/history
- Biological Control Agents/pharmacology
- DNA/antagonists & inhibitors
- DNA/genetics
- DNA/metabolism
- Forestry/methods
- Gene Expression Regulation/drug effects
- History, 20th Century
- History, 21st Century
- Humans
- Larva/drug effects
- Larva/genetics
- Larva/metabolism
- Moths/drug effects
- Moths/genetics
- Moths/growth & development
- Moths/metabolism
- Muscular Atrophy, Spinal/genetics
- Muscular Atrophy, Spinal/metabolism
- Muscular Atrophy, Spinal/pathology
- Muscular Atrophy, Spinal/therapy
- Muscular Dystrophy, Duchenne/genetics
- Muscular Dystrophy, Duchenne/metabolism
- Muscular Dystrophy, Duchenne/pathology
- Muscular Dystrophy, Duchenne/therapy
- Nanoparticles/administration & dosage
- Nanoparticles/chemistry
- Neuromuscular Agents/chemical synthesis
- Neuromuscular Agents/history
- Neuromuscular Agents/therapeutic use
- Oligonucleotides, Antisense/chemical synthesis
- Oligonucleotides, Antisense/genetics
- Oligonucleotides, Antisense/metabolism
- RNA, Messenger/antagonists & inhibitors
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
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Affiliation(s)
- Volodymyr V Oberemok
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Kateryna V Laikova
- Medical Academy named after S.I. Georgievsky, V.I. Vernadsky Crimean Federal University, Lenin Avenue 5/7, 295051 Simferopol, Crimea.
| | - Anna I Repetskaya
- Botanical Garden named after N.V. Bagrov, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 29500 Simferopol, Crimea.
| | - Igor M Kenyo
- Academy of Bioresources and Environmental Management of V.I. Vernadsky Crimean Federal University, 95492 Agrarnoye, Crimea.
| | - Mikhail V Gorlov
- D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, 125047 Moscow, Russia.
| | - Igor N Kasich
- Rostov State Medical University, Nakhchivan Lane 29, 344022 Rostov-on-Don, Russia.
| | - Alisa M Krasnodubets
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Nikita V Gal'chinsky
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Iryna I Fomochkina
- Medical Academy named after S.I. Georgievsky, V.I. Vernadsky Crimean Federal University, Lenin Avenue 5/7, 295051 Simferopol, Crimea.
| | - Aleksei S Zaitsev
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Viktoriya V Bekirova
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Eleonora E Seidosmanova
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Ksenia I Dydik
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Anna O Meshcheryakova
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Sergey A Nazarov
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Natalya N Smagliy
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Edie L Chelengerova
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Alina A Kulanova
- Medical Academy named after S.I. Georgievsky, V.I. Vernadsky Crimean Federal University, Lenin Avenue 5/7, 295051 Simferopol, Crimea.
| | - Karim Deri
- Medical Academy named after S.I. Georgievsky, V.I. Vernadsky Crimean Federal University, Lenin Avenue 5/7, 295051 Simferopol, Crimea.
| | - Mikhail V Subbotkin
- Medical Academy named after S.I. Georgievsky, V.I. Vernadsky Crimean Federal University, Lenin Avenue 5/7, 295051 Simferopol, Crimea.
| | - Refat Z Useinov
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Maksym N Shumskykh
- Taurida Academy, V.I. Vernadsky Crimean Federal University, Vernadsky Avenue 4, 295007 Simferopol, Crimea.
| | - Anatoly V Kubyshkin
- Medical Academy named after S.I. Georgievsky, V.I. Vernadsky Crimean Federal University, Lenin Avenue 5/7, 295051 Simferopol, Crimea.
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Alternative Splicing as a Target for Cancer Treatment. Int J Mol Sci 2018; 19:ijms19020545. [PMID: 29439487 PMCID: PMC5855767 DOI: 10.3390/ijms19020545] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 01/29/2018] [Accepted: 01/29/2018] [Indexed: 02/06/2023] Open
Abstract
Alternative splicing is a key mechanism determinant for gene expression in metazoan. During alternative splicing, non-coding sequences are removed to generate different mature messenger RNAs due to a combination of sequence elements and cellular factors that contribute to splicing regulation. A different combination of splicing sites, exonic or intronic sequences, mutually exclusive exons or retained introns could be selected during alternative splicing to generate different mature mRNAs that could in turn produce distinct protein products. Alternative splicing is the main source of protein diversity responsible for 90% of human gene expression, and it has recently become a hallmark for cancer with a full potential as a prognostic and therapeutic tool. Currently, more than 15,000 alternative splicing events have been associated to different aspects of cancer biology, including cell proliferation and invasion, apoptosis resistance and susceptibility to different chemotherapeutic drugs. Here, we present well established and newly discovered splicing events that occur in different cancer-related genes, their modification by several approaches and the current status of key tools developed to target alternative splicing with diagnostic and therapeutic purposes.
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Holmes-Hampton GP, Crooks DR, Haller RG, Guo S, Freier SM, Monia BP, Rouault TA. Use of antisense oligonucleotides to correct the splicing error in ISCU myopathy patient cell lines. Hum Mol Genet 2017; 25:5178-5187. [PMID: 28007899 DOI: 10.1093/hmg/ddw338] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 09/30/2016] [Indexed: 11/12/2022] Open
Abstract
ISCU myopathy is an inherited disease that primarily affects individuals of northern Swedish descent who share a single point mutation in the fourth intron of the ISCU gene. The current study shows correction of specific phenotypes associated with disease following treatment with an antisense oligonucleotide (ASO) targeted to the site of the mutation. We have shown that ASO treatment diminished aberrant splicing and increased ISCU protein levels in both patient fibroblasts and patient myotubes in a concentration dependent fashion. Upon ASO treatment, levels of SDHB in patient myotubular cell lines increased to levels observed in control myotubular cell lines. Additionally, we have shown that both patient fibroblast and myotubular cell lines displayed an increase in complex II activity with a concomitant decrease in succinate levels in patient myotubular cell lines after ASO treatment. Mitochondrial and cytosolic aconitase activities increased significantly following ASO treatment in patient myotubes. The current study suggests that ASO treatment may serve as a viable approach to correcting ISCU myopathy in patients.
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Affiliation(s)
- Gregory P Holmes-Hampton
- Molecular Medicine Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, USA
| | - Daniel R Crooks
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Ronald G Haller
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, TX, USA, Neuromuscular Center, Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, TX 75231, USA
| | - Shuling Guo
- Department of Antisense Drug Discovery, Ionis Pharmaceuticals, Carlsbad, CA, USA
| | - Susan M Freier
- Department of Antisense Drug Discovery, Ionis Pharmaceuticals, Carlsbad, CA, USA
| | - Brett P Monia
- Department of Antisense Drug Discovery, Ionis Pharmaceuticals, Carlsbad, CA, USA
| | - Tracey A Rouault
- Molecular Medicine Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, USA
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Abstract
Since the first antiviral drug, idoxuridine, was approved in 1963, 90 antiviral drugs categorized into 13 functional groups have been formally approved for the treatment of the following 9 human infectious diseases: (i) HIV infections (protease inhibitors, integrase inhibitors, entry inhibitors, nucleoside reverse transcriptase inhibitors, nonnucleoside reverse transcriptase inhibitors, and acyclic nucleoside phosphonate analogues), (ii) hepatitis B virus (HBV) infections (lamivudine, interferons, nucleoside analogues, and acyclic nucleoside phosphonate analogues), (iii) hepatitis C virus (HCV) infections (ribavirin, interferons, NS3/4A protease inhibitors, NS5A inhibitors, and NS5B polymerase inhibitors), (iv) herpesvirus infections (5-substituted 2'-deoxyuridine analogues, entry inhibitors, nucleoside analogues, pyrophosphate analogues, and acyclic guanosine analogues), (v) influenza virus infections (ribavirin, matrix 2 protein inhibitors, RNA polymerase inhibitors, and neuraminidase inhibitors), (vi) human cytomegalovirus infections (acyclic guanosine analogues, acyclic nucleoside phosphonate analogues, pyrophosphate analogues, and oligonucleotides), (vii) varicella-zoster virus infections (acyclic guanosine analogues, nucleoside analogues, 5-substituted 2'-deoxyuridine analogues, and antibodies), (viii) respiratory syncytial virus infections (ribavirin and antibodies), and (ix) external anogenital warts caused by human papillomavirus infections (imiquimod, sinecatechins, and podofilox). Here, we present for the first time a comprehensive overview of antiviral drugs approved over the past 50 years, shedding light on the development of effective antiviral treatments against current and emerging infectious diseases worldwide.
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Affiliation(s)
- Erik De Clercq
- KU Leuven-University of Leuven, Rega Institute for Medical Research, Department of Microbiology and Immunology, Leuven, Belgium
| | - Guangdi Li
- KU Leuven-University of Leuven, Rega Institute for Medical Research, Department of Microbiology and Immunology, Leuven, Belgium Department of Metabolism and Endocrinology, Metabolic Syndrome Research Center, Key Laboratory of Diabetes Immunology, Ministry of Education, National Clinical Research Center for Metabolic Diseases, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
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Verlinden BK, Louw A, Birkholtz LM. Resisting resistance: is there a solution for malaria? Expert Opin Drug Discov 2016; 11:395-406. [PMID: 26926843 DOI: 10.1517/17460441.2016.1154037] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Currently, widely used antimalarial drugs have a limited clinical lifespan due to parasite resistance development. With resistance continuously rising, antimalarial drug discovery requires strategies to decrease the time of delivering a new antimalarial drug while simultaneously increasing the drug's therapeutic lifespan. Lessons learnt from various chemotherapeutic resistance studies in the fields of antibiotic and cancer research offer potentially useful strategies that can be applied to antimalarial drug discovery. AREAS COVERED In this review the authors discuss current strategies to circumvent resistance in malaria and alternatives that could be employed. EXPERT OPINION Scientists have been 'beating back' the malaria parasite with novel drugs for the past 49 years but the constant rise in antimalarial drug resistance is forcing the drug discovery community to explore alternative strategies. Avant-garde anti-resistance strategies from alternative fields may assist our endeavors to manage, control and prevent antimalarial drug resistance to progress beyond beating the resistant parasite back, to stopping it dead in its tracks.
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Affiliation(s)
- Bianca K Verlinden
- a Department of Biochemistry, Centre for Sustainable Malaria Control, Faculty of Natural and Agricultural Sciences , University of Pretoria , Pretoria , South Africa
| | - Abraham Louw
- a Department of Biochemistry, Centre for Sustainable Malaria Control, Faculty of Natural and Agricultural Sciences , University of Pretoria , Pretoria , South Africa
| | - Lyn-Marié Birkholtz
- a Department of Biochemistry, Centre for Sustainable Malaria Control, Faculty of Natural and Agricultural Sciences , University of Pretoria , Pretoria , South Africa
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Shimono Y, Mukohyama J, Nakamura SI, Minami H. MicroRNA Regulation of Human Breast Cancer Stem Cells. J Clin Med 2015; 5:jcm5010002. [PMID: 26712794 PMCID: PMC4730127 DOI: 10.3390/jcm5010002] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 12/01/2015] [Accepted: 12/21/2015] [Indexed: 12/11/2022] Open
Abstract
MicroRNAs (miRNAs) are involved in virtually all biological processes, including stem cell maintenance, differentiation, and development. The dysregulation of miRNAs is associated with many human diseases including cancer. We have identified a set of miRNAs differentially expressed between human breast cancer stem cells (CSCs) and non-tumorigenic cancer cells. In addition, these miRNAs are similarly upregulated or downregulated in normal mammary stem/progenitor cells. In this review, we mainly describe the miRNAs that are dysregulated in human breast CSCs directly isolated from clinical specimens. The miRNAs and their clusters, such as the miR-200 clusters, miR-183 cluster, miR-221-222 cluster, let-7, miR-142 and miR-214, target the genes and pathways important for stem cell maintenance, such as the self-renewal gene BMI1, apoptosis, Wnt signaling, Notch signaling, and epithelial-to-mesenchymal transition. In addition, the current evidence shows that metastatic breast CSCs acquire a phenotype that is different from the CSCs in a primary site. Thus, clarifying the miRNA regulation of the metastatic breast CSCs will further advance our understanding of the roles of human breast CSCs in tumor progression.
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Affiliation(s)
- Yohei Shimono
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.
- Division of Medical Oncology/Hematology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.
| | - Junko Mukohyama
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.
| | - Shun-Ichi Nakamura
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.
- Division of Biochemistry, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.
| | - Hironobu Minami
- Division of Medical Oncology/Hematology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.
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Progress and Prospects of Anti-HBV Gene Therapy Development. Int J Mol Sci 2015; 16:17589-610. [PMID: 26263978 PMCID: PMC4581210 DOI: 10.3390/ijms160817589] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 07/20/2015] [Accepted: 07/22/2015] [Indexed: 12/11/2022] Open
Abstract
Despite the availability of an effective vaccine against hepatitis B virus (HBV), chronic infection with the virus remains a major global health concern. Current drugs against HBV infection are limited by emergence of resistance and rarely achieve complete viral clearance. This has prompted vigorous research on developing better drugs against chronic HBV infection. Advances in understanding the life cycle of HBV and improvements in gene-disabling technologies have been impressive. This has led to development of better HBV infection models and discovery of new drug candidates. Ideally, a regimen against chronic HBV infection should completely eliminate all viral replicative intermediates, especially covalently closed circular DNA (cccDNA). For the past few decades, nucleic acid-based therapy has emerged as an attractive alternative that may result in complete clearance of HBV in infected patients. Several genetic anti-HBV strategies have been developed. The most studied approaches include the use of antisense oligonucleotides, ribozymes, RNA interference effectors and gene editing tools. This review will summarize recent developments and progress made in the use of gene therapy against HBV.
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Avitabile C, Cimmino A, Romanelli A. Oligonucleotide analogues as modulators of the expression and function of noncoding RNAs (ncRNAs): emerging therapeutics applications. J Med Chem 2014; 57:10220-40. [PMID: 25280271 DOI: 10.1021/jm5006594] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
ncRNAs are emerging as key regulators of physiological and pathological processes and therefore have been identified as pharmacological targets and as markers for some diseases. Oligonucleotide analogues represent so far the most widely employed tool for the modulation of the expression of ncRNAs. In this perspective we briefly describe most of the known classes of ncRNAs and then we discuss the design and the applications of oligonucleotide analogues for their targeting. The effects of modifications of the chemical structure of the oligonucleotides on properties such as the binding affinity toward targets and off targets, and the stability to degradation and their biological effects (when known) are discussed. Examples of molecules currently used in clinical trials are also reported.
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Affiliation(s)
- Concetta Avitabile
- Università di Napoli "Federico II" , Dipartimento di Farmacia, via Mezzocannone 16, 80134 Napoli, Italy
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Grijalvo S, Aviñó A, Eritja R. Oligonucleotide delivery: a patent review (2010 - 2013). Expert Opin Ther Pat 2014; 24:801-19. [PMID: 24798406 DOI: 10.1517/13543776.2014.915944] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The use of aptamers, antisense technology and RNA interference has allowed nucleic acids to be considered as promising alternatives to classical drugs. However, nucleic acids face several obstacles in the creation of effective nucleic acid drugs. The development of these approaches has strengthened the pipeline with an increasing number of these therapies in clinical trials. AREAS COVERED This review covers research and patent literature from the last three years, focusing on the development of safe and effective non-viral drug delivery systems for the treatment of diseases such as cancer or genetic disorders by using oligonucleotides. EXPERT OPINION The therapeutic applications of oligonucleotides have overcome multiple obstacles, especially in biodistribution and cellular internalization. Cationic lipids are the most used vehicles for the preparation of novel formulations. Combinatorial libraries of these compounds and the use of solid lipid nanoparticles carrying these synthetic cationic lipids (cholesterol and PEG) have enhanced cellular uptake and biocompatibility of nucleic acids. Besides this extensive use, synthesis of oligonucleotides covalently linked to lipids has also emerged as a promising alternative to formulations. The use of peptides alone or in combination with lipids is an expanding field for oligonucleotide delivery. Polymeric platforms are also good candidates as they showed improved cellular uptake, biodegradability, biocompatibility and the possibility of incorporating several components, such as ligands for receptor-mediated endocytosis and molecules, to facilitate endosomal escape. Finally, nanomaterials may also play an important role in the future. The last developments showed improvement in in vivo efficacy, thus gaining a foothold in therapeutics.
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Affiliation(s)
- Santiago Grijalvo
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), and Networking Research Centre of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Department of Chemical and Biomolecular Nanotechnology , Jordi Girona 18-26, 08034 Barcelona , Spain +34 934006145 ; +34 932045904 ;
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Tan CW, Chan YF, Quah YW, Poh CL. Inhibition of enterovirus 71 infection by antisense octaguanidinium dendrimer-conjugated morpholino oligomers. Antiviral Res 2014; 107:35-41. [PMID: 24769243 PMCID: PMC7118997 DOI: 10.1016/j.antiviral.2014.04.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 03/25/2014] [Accepted: 04/13/2014] [Indexed: 12/11/2022]
Abstract
Enterovirus 71 (EV-71) infections are generally manifested as mild hand, foot and mouth disease, but have been reported to cause severe neurological complications with high mortality rates. Treatment options remain limited due to the lack of antivirals. Octaguanidinium-conjugated morpholino oligomers (vivo-MOs) are single-stranded DNA-like antisense agents that can readily penetrate cells and reduce gene expression by steric blocking of complementary RNA sequences. In this study, inhibitory effects of three vivo-MOs that are complementary to the EV-71 internal ribosome entry site (IRES) and the RNA-dependent RNA polymerase (RdRP) were tested in RD cells. Vivo-MO-1 and vivo-MO-2 targeting the EV-71 IRES showed significant viral plaque reductions of 2.5 and 3.5 log10PFU/ml, respectively. Both vivo-MOs reduced viral RNA copies and viral capsid expression in RD cells in a dose-dependent manner. In contrast, vivo-MO-3 targeting the EV-71 RdRP exhibited less antiviral activity. Both vivo-MO-1 and 2 remained active when administered either 4h before or within 6h after EV-71 infection. Vivo-MO-2 exhibited antiviral activities against poliovirus (PV) and coxsackievirus A16 but vivo-MO-1 showed no antiviral activities against PV. Both the IRES-targeting vivo-MO-1 and vivo-MO-2 inhibit EV-71 RNA translation. Resistant mutants arose after serial passages in the presence of vivo-MO-1, but none were isolated against vivo-MO-2. A single T to C substitution at nucleotide position 533 was sufficient to confer resistance to vivo-MO-1. Our findings suggest that IRES-targeting vivo-MOs are good antiviral candidates for treating early EV-71 infection, and vivo-MO-2 is a more favorable candidate with broader antiviral spectrum against enteroviruses and are refractory to antiviral resistance.
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Affiliation(s)
- Chee Wah Tan
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Yoke Fun Chan
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia; Tropical Infectious Disease Research and Education Center, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Yi Wan Quah
- Faculty of Science and Technology, Sunway University, 46150 Petaling Jaya, Selangor, Malaysia
| | - Chit Laa Poh
- Faculty of Science and Technology, Sunway University, 46150 Petaling Jaya, Selangor, Malaysia.
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