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Fang L, Xiao L, Jun YW, Onishi Y, Kool ET. Reversible 2'-OH acylation enhances RNA stability. Nat Chem 2023; 15:1296-1305. [PMID: 37365334 DOI: 10.1038/s41557-023-01246-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/19/2023] [Indexed: 06/28/2023]
Abstract
The presence of a hydroxyl group at the 2'-position in its ribose makes RNA susceptible to hydrolysis. Stabilization of RNAs for storage, transport and biological application thus remains a serious challenge, particularly for larger RNAs that are not accessible by chemical synthesis. Here we present reversible 2'-OH acylation as a general strategy to preserve RNA of any length or origin. High-yield polyacylation of 2'-hydroxyls ('cloaking') by readily accessible acylimidazole reagents effectively shields RNAs from both thermal and enzymatic degradation. Subsequent treatment with water-soluble nucleophilic reagents removes acylation adducts quantitatively ('uncloaking') and recovers a remarkably broad range of RNA functions, including reverse transcription, translation and gene editing. Furthermore, we show that certain α-dimethylamino- and α-alkoxy- acyl adducts are spontaneously removed in human cells, restoring messenger RNA translation with extended functional half-lives. These findings support the potential of reversible 2'-acylation as a simple and general molecular solution for enhancing RNA stability and provide mechanistic insights for stabilizing RNA regardless of length or origin.
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Affiliation(s)
- Linglan Fang
- Department of Chemistry, Stanford University, Stanford, CA, USA
| | - Lu Xiao
- Department of Chemistry, Stanford University, Stanford, CA, USA
| | - Yong Woong Jun
- Department of Chemistry, Stanford University, Stanford, CA, USA
| | | | - Eric T Kool
- Department of Chemistry, Stanford University, Stanford, CA, USA.
- Sarafan ChEM-H Institute, Stanford University, Stanford, CA, USA.
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2
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Anwar DM, El-Sayed M, Reda A, Fang JY, Khattab SN, Elzoghby AO. Recent advances in herbal combination nanomedicine for cancer: delivery technology and therapeutic outcomes. Expert Opin Drug Deliv 2021; 18:1609-1625. [PMID: 34254868 DOI: 10.1080/17425247.2021.1955853] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Introduction: The use of herbal compounds in cancer therapy has great potential to promote the efficacy of current cancer therapeutic strategies. Herbal compounds were successfully reported to enhance tumor cells sensitization to the action of chemo-, hormonal- and gene-therapeutic agents via different mechanisms. Herbal ingredients can affect different signaling pathways, reduce the toxic side effects or inhibit the efflux of anticancer drugs.Areas covered: This review will discuss the delivery of herbal compounds with other cancer treatments such as hormonal, small molecule inhibitors and inorganic hybrids to tumor cells. An overview of physicochemical properties of herbal components that require intelligent design of combo-nanomedicines for efficient co-delivery of those herbal-derived and other anticancer agents was discussed. Nanocarriers provide various benefits to overcome the shortcomings of the encapsulated herbal compounds including improved solubility, increased stability and enhanced tumor targeting. Different nanocarrier systems were the focus of this review.Expert opinion: Multifunctional nanocarrier systems encapsulating herbal and different anticancer drugs showed to be a wonderful approach in the treatment of cancer enabling the co-delivery of anticancer drugs with versatile modes of action in an accurate manner in an attempt to enhance the efficacy, benefit from the synergism between the drugs as well as to minimize the development of multi-drug resistance. The main challenge point is the early detection and management of any developed adverse effect.
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Affiliation(s)
- Doaa M Anwar
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Arab Academy for Science Technology & Maritime Transport, Alexandria, Egypt.,Cancer Nanotechnology Research Laboratory (CNRL), Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Mousa El-Sayed
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt.,Department of Chemistry, School of Sciences and Engineering, American University in Cairo, New Cairo, Egypt
| | - Asmaa Reda
- Nanomedicine Division, Center for Materials Science, University of Science and Technology (UST), Zewail City of Science and Technology, Giza, Egypt.,Molecular and Cellular Biology Department, Faculty of Science, Benha University, Benha, Egypt
| | - Jia-You Fang
- Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan.,Research Center for Industry of Human Ecology, Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Taoyuan, Taiwan.,Department of AnesthesiologyChang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Sherine N Khattab
- Cancer Nanotechnology Research Laboratory (CNRL), Faculty of Pharmacy, Alexandria University, Alexandria, Egypt.,Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Ahmed O Elzoghby
- Cancer Nanotechnology Research Laboratory (CNRL), Faculty of Pharmacy, Alexandria University, Alexandria, Egypt.,Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
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Fessler AB, Fowler AJ, Ogle CA. Directly Quantifiable Biotinylation Using a Water-Soluble Isatoic Anhydride Platform. Bioconjug Chem 2021; 32:904-908. [PMID: 33881828 DOI: 10.1021/acs.bioconjchem.1c00150] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Isatoic anhydride (IA) has been shown to be a useful platform for quantifiable bioconjugation. The elaboration of a water-soluble isatoic anhydride-based platform with biotin offers readily quantifiable biotinylation reagents through nondestructive methods of quantification. The incorporation of functionality is directly quantified using the reagent's unique absorbance or fluorescence signature, located outside the biological window. Several biotinylation reagents are prepared with various linker lengths, and the quantification of biotinylated proteins is demonstrated and compared to results from the traditional HABA assay.
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Affiliation(s)
- Adam B Fessler
- Department of Chemistry, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Anthony J Fowler
- Department of Chemistry, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Craig A Ogle
- Department of Chemistry, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
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Spanedda MV, Bourel-Bonnet L. Cyclic Anhydrides as Powerful Tools for Bioconjugation and Smart Delivery. Bioconjug Chem 2021; 32:482-496. [PMID: 33662203 DOI: 10.1021/acs.bioconjchem.1c00023] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cyclic anhydrides are potent tools for bioconjugation; therefore, they are broadly used in the functionalization of biomolecules and carriers. The pH-dependent stability and reactivity, as well as the physical properties, can be tuned by the structure of the cyclic anhydride used; thus, their application in smart delivery systems has become very important. This review intends to cover the last updates in the use of cyclic anhydrides as pH-sensitive linkers, their differences in reactivity, and the latest applications found in bioconjugation chemistry or chemical biology, and when possible, in drug delivery.
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Affiliation(s)
- Maria Vittoria Spanedda
- Laboratoire de Conception et Application de Molécules Bioactives, 3Bio team, ITI InnoVec, UMR 7199 - CNRS/Université de Strasbourg, Faculté de Pharmacie, 74 route du Rhin, BP 60024, 67401 Illkirch Cedex, France
| | - Line Bourel-Bonnet
- Laboratoire de Conception et Application de Molécules Bioactives, 3Bio team, ITI InnoVec, UMR 7199 - CNRS/Université de Strasbourg, Faculté de Pharmacie, 74 route du Rhin, BP 60024, 67401 Illkirch Cedex, France
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Fessler AB, Dey A, Finis DS, Fowler AJ, Chakrabarti K, Ogle CA. Innately Water-Soluble Isatoic Anhydrides with Modulated Reactivities for RNA SHAPE Analysis. Bioconjug Chem 2020; 31:884-888. [DOI: 10.1021/acs.bioconjchem.0c00024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Abstract
RNA is a versatile biomolecule with a broad range of biological functions that go far beyond its initially described role as a simple information carrier. The development of chemical methods to control, manipulate and modify RNA has the potential to yield new insights into its many functions and properties. Traditionally, most of these methods involved the chemical modification of RNA structure using solid-state synthesis or enzymatic transformations. However, over the past 15 years, the direct functionalization of RNA by selective acylation of the 2'-hydroxyl (2'-OH) group has emerged as a powerful alternative that enables the simple modification of both synthetic and transcribed RNAs. In this Review, we discuss the chemical properties and design of effective reagents for RNA 2'-OH acylation, highlighting the unique problem of 2'-OH reactivity in the presence of water. We elaborate on how RNA 2'-OH acylation is being exploited to develop selective chemical probes that enable interrogation of RNA structure and function, and describe new developments and applications in the field.
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Habibian M, Velema WA, Kietrys AM, Onishi Y, Kool ET. Polyacetate and Polycarbonate RNA: Acylating Reagents and Properties. Org Lett 2019; 21:5413-5416. [PMID: 31268332 PMCID: PMC6775763 DOI: 10.1021/acs.orglett.9b01526] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Acylation of RNA at 2'-OH groups is widely applied in mapping RNA structure and recently for controlling RNA function. Reactions are described that install the smallest 2-carbon acyl groups on RNA-namely, 2'-O-acetyl and 2'-O-carbonate groups. Hybridization and thermal melting experiments are performed to assess the effects of the acyl groups on duplex formation. Both reagents can be employed at lower concentrations to map RNA secondary structure by reverse transcriptase primer extension (SHAPE) methods.
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Affiliation(s)
| | | | - Anna M. Kietrys
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Yoshiyuki Onishi
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Eric T. Kool
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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