1
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Darrah KE, Deiters A. Translational control of gene function through optically regulated nucleic acids. Chem Soc Rev 2021; 50:13253-13267. [PMID: 34739027 DOI: 10.1039/d1cs00257k] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Translation of mRNA into protein is one of the most fundamental processes within biological systems. Gene expression is tightly regulated both in space and time, often involving complex signaling or gene regulatory networks, as most prominently observed in embryo development. Thus, studies of gene function require tools with a matching level of external control. Light is an excellent conditional trigger as it is minimally invasive, can be easily tuned in wavelength and amplitude, and can be applied with excellent spatial and temporal resolution. To this end, modification of established oligonucleotide-based technologies with optical control elements, in the form of photocaging groups and photoswitches, has rendered these tools capable of navigating the dynamic regulatory pathways of mRNA translation in cellular and in vivo models. In this review, we discuss the different optochemical approaches used to generate photoresponsive nucleic acids that activate and deactivate gene expression and function at the translational level.
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Affiliation(s)
- Kristie E Darrah
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA.
| | - Alexander Deiters
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA.
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2
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Yang L, Trentini D, Kim H, Sul J, Eberwine JH, Dmochowski IJ. Photoactivatable Circular Caged Oligonucleotides for Transcriptome In Vivo Analysis (TIVA). CHEMPHOTOCHEM 2021; 5:940-946. [DOI: 10.1002/cptc.202100098] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Linlin Yang
- Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104-6323 USA
| | - Dora Trentini
- Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104-6323 USA
| | - HyunBum Kim
- Department of Pharmacology University of Pennsylvania 38 John Morgan Building 3620 Hamilton Walk Philadelphia PA 19104-6084 USA
| | - Jai‐Yoon Sul
- Department of Pharmacology University of Pennsylvania 38 John Morgan Building 3620 Hamilton Walk Philadelphia PA 19104-6084 USA
| | - James H. Eberwine
- Department of Pharmacology University of Pennsylvania 38 John Morgan Building 3620 Hamilton Walk Philadelphia PA 19104-6084 USA
| | - Ivan J. Dmochowski
- Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104-6323 USA
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3
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Yang L, Dmochowski IJ. Conditionally Activated ("Caged") Oligonucleotides. Molecules 2021; 26:1481. [PMID: 33803234 PMCID: PMC7963183 DOI: 10.3390/molecules26051481] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 01/09/2023] Open
Abstract
Conditionally activated ("caged") oligonucleotides provide useful spatiotemporal control for studying dynamic biological processes, e.g., regulating in vivo gene expression or probing specific oligonucleotide targets. This review summarizes recent advances in caging strategies, which involve different stimuli in the activation step. Oligo cyclization is a particularly attractive caging strategy, which simplifies the probe design and affords oligo stabilization. Our laboratory developed an efficient synthesis for circular caged oligos, and a circular caged antisense DNA oligo was successfully applied in gene regulation. A second technology is Transcriptome In Vivo Analysis (TIVA), where caged oligos enable mRNA isolation from single cells in living tissue. We highlight our development of TIVA probes with improved caging stability. Finally, we illustrate the first protease-activated oligo probe, which was designed for caspase-3. This expands the toolkit for investigating the transcriptome under a specific physiologic condition (e.g., apoptosis), particularly in specimens where light activation is impractical.
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Affiliation(s)
| | - Ivan J. Dmochowski
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA;
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4
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O’Connor MJ, Beebe LL, Deodato D, Ball RE, Page AT, VanLeuven AJ, Harris KT, Park S, Hariharan V, Lauderdale JD, Dore TM. Bypassing Glutamic Acid Decarboxylase 1 (Gad1) Induced Craniofacial Defects with a Photoactivatable Translation Blocker Morpholino. ACS Chem Neurosci 2019; 10:266-278. [PMID: 30200754 PMCID: PMC6337688 DOI: 10.1021/acschemneuro.8b00231] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
![]()
γ-Amino
butyric acid (GABA) mediated signaling is critical
in the central and enteric nervous systems, pancreas, lungs, and other
tissues. It is associated with many neurological disorders and craniofacial
development. Glutamic acid decarboxylase (GAD) synthesizes GABA from
glutamate, and knockdown of the gad1 gene results
in craniofacial defects that are lethal in zebrafish. To bypass this
and enable observation of the neurological defects resulting from
knocking down gad1 expression, a photoactivatable
morpholino oligonucleotide (MO) against gad1 was
prepared by cyclization with a photocleavable linker rendering the
MO inactive. The cyclized MO was stable in the dark and toward degradative
enzymes and was completely linearized upon brief exposure to 405 nm
light. In the course of investigating the function of the ccMOs in
zebrafish, we discovered that zebrafish possess paralogous gad1 genes, gad1a and gad1b. A gad1b MO injected at the 1–4 cell stage
caused severe morphological defects in head development, which could
be bypassed, enabling the fish to develop normally, if the fish were
injected with a photoactivatable, cyclized gad1b MO
and grown in the dark. At 1 day post fertilization (dpf), light activation
of the gad1b MO followed by observation at 3 and
7 dpf led to increased and abnormal electrophysiological brain activity
compared to wild type animals. The photocleavable linker can be used
to cyclize and inactivate any MO, and represents a general strategy
to parse the function of developmentally important genes in a spatiotemporal
manner.
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Affiliation(s)
- Matthew J. O’Connor
- New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
| | - Lindsey L. Beebe
- Department of Genetics, University of Georgia, Athens, Georgia 30602, United States
| | - Davide Deodato
- New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
| | - Rebecca E. Ball
- Department of Cellular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - A. Tyler Page
- Department of Cellular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - Ariel J. VanLeuven
- Department of Cellular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - Kyle T. Harris
- Department of Chemistry, University of Georgia, Athens, Georgia 30602 United States
| | - Sungdae Park
- Department of Genetics, University of Georgia, Athens, Georgia 30602, United States
| | - Vani Hariharan
- Department of Cellular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - James D. Lauderdale
- Department of Cellular Biology, University of Georgia, Athens, Georgia 30602, United States
- Neuroscience
Division
of the Biomedical and Health Sciences Institute, Athens, Georgia 30602, United States
| | - Timothy M. Dore
- New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
- Department of Chemistry, University of Georgia, Athens, Georgia 30602 United States
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5
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Yang L, Kim HB, Sul JY, Yeldell SB, Eberwine JH, Dmochowski IJ. Efficient Synthesis of Light-Triggered Circular Antisense Oligonucleotides Targeting Cellular Protein Expression. Chembiochem 2018; 19:1250-1254. [PMID: 29479781 PMCID: PMC6248878 DOI: 10.1002/cbic.201800012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Indexed: 02/06/2023]
Abstract
Light-activated ("caged") antisense oligonucleotides are powerful molecules for regulating gene expression at submicron spatial resolution through the focal modulation of endogenous cellular processes. Cyclized caged oligos are particularly promising structures because of their inherent stability and similarity to naturally occurring circular DNA and RNA molecules. Here, we introduce an efficient route for cyclizing an antisense oligodeoxynucleotide incorporating a photocleavable linker. Oligo cyclization was achieved for several sequences in nearly quantitative yields through intramolecular copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC). Caging stability and light activation were characterized by FRET efficiency, denaturing gel assay, and melting temperature measurements. Finally, a cyclized caged oligo was designed to target gfap, and it gave a tenfold reduction in glial fibrillary acidic protein upon photoactivation in astrocytes.
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Affiliation(s)
- Linlin Yang
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, 19104-6323, USA
| | - Hyun Bum Kim
- Department of Pharmacology, University of Pennsylvania, 38 John Morgan Building, 3620 Hamilton Walk, Philadelphia, PA, 19104-6084, USA
| | - Jai-Yoon Sul
- Department of Pharmacology, University of Pennsylvania, 38 John Morgan Building, 3620 Hamilton Walk, Philadelphia, PA, 19104-6084, USA
| | - Sean B Yeldell
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, 19104-6323, USA
| | - James H Eberwine
- Department of Pharmacology, University of Pennsylvania, 38 John Morgan Building, 3620 Hamilton Walk, Philadelphia, PA, 19104-6084, USA
| | - Ivan J Dmochowski
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA, 19104-6323, USA
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6
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Debart F, Dupouy C, Vasseur JJ. Stimuli-responsive oligonucleotides in prodrug-based approaches for gene silencing. Beilstein J Org Chem 2018; 14:436-469. [PMID: 29520308 PMCID: PMC5827813 DOI: 10.3762/bjoc.14.32] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/26/2018] [Indexed: 12/14/2022] Open
Abstract
Oligonucleotides (ONs) have been envisaged for therapeutic applications for more than thirty years. However, their broad use requires overcoming several hurdles such as instability in biological fluids, low cell penetration, limited tissue distribution, and off-target effects. With this aim, many chemical modifications have been introduced into ONs definitively as a means of modifying and better improving their properties as gene silencing agents and some of them have been successful. Moreover, in the search for an alternative way to make efficient ON-based drugs, the general concept of prodrugs was applied to the oligonucleotide field. A prodrug is defined as a compound that undergoes transformations in vivo to yield the parent active drug under different stimuli. The interest in stimuli-responsive ONs for gene silencing functions has been notable in recent years. The ON prodrug strategies usually help to overcome limitations of natural ONs due to their low metabolic stability and poor delivery. Nevertheless, compared to permanent ON modifications, transient modifications in prodrugs offer the opportunity to regulate ON activity as a function of stimuli acting as switches. Generally, the ON prodrug is not active until it is triggered to release an unmodified ON. However, as it will be described in some examples, the opposite effect can be sought. This review examines ON modifications in response to various stimuli. These stimuli may be internal or external to the cell, chemical (glutathione), biochemical (enzymes), or physical (heat, light). For each stimulus, the discussion has been separated into sections corresponding to the site of the modification in the nucleotide: the internucleosidic phosphate, the nucleobase, the sugar or the extremities of ONs. Moreover, the review provides a current and detailed account of stimuli-responsive ONs with the main goal of gene silencing. However, for some stimuli-responsive ONs reported in this review, no application for controlling gene expression has been shown, but a certain potential in this field could be demonstrated. Additionally, other applications in different domains have been mentioned to extend the interest in such molecules.
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Affiliation(s)
- Françoise Debart
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France
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7
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Zhang L, Liang D, Wang Y, Li D, Zhang J, Wu L, Feng M, Yi F, Xu L, Lei L, Du Q, Tang X. Caged circular siRNAs for photomodulation of gene expression in cells and mice. Chem Sci 2017; 9:44-51. [PMID: 29629072 PMCID: PMC5869302 DOI: 10.1039/c7sc03842a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Accepted: 10/18/2017] [Indexed: 12/12/2022] Open
Abstract
Caged siRNAs with a circular structure were successfully used for photoregulation of target genes in both cells and mice.
By means of RNA interference (RNAi), small interfering RNAs (siRNAs) play important roles in gene function study and drug development. Recently, photolabile siRNAs were developed to elucidate the process of gene silencing in terms of space, time and degree through chemical modification of siRNAs. We report herein a novel type of photolabile siRNA that was synthesized through cyclizing two ends of a single stranded RNA with a photocleavable linker. These circular siRNAs became more resistant to serum degradation. Using reporter assays of firefly/Renilla luciferase and GFP/RFP, the gene silencing activities of caged circular siRNAs for both genes were evaluated in HEK293 cells. The results indicated that the target genes were successfully photomodulated using these caged circular siRNAs that were formed by caged circular antisense guide RNAs and their linear complementary sense RNAs. Using the caged circular siRNA targeting GFP, we also successfully achieved photomodulation of GFP expression in mice. Upon further optimization, this new type of caged circular siRNA is expected to be a promising tool for studying gene therapy.
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Affiliation(s)
- Liangliang Zhang
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - Duanwei Liang
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - Yuan Wang
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - Dong Li
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - Jinhao Zhang
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - Li Wu
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - Mengke Feng
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - Fan Yi
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - Luzheng Xu
- Medical and Health Analytical Center , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China
| | - Liandi Lei
- Medical and Health Analytical Center , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China
| | - Quan Du
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
| | - XinJing Tang
- State Key Laboratory of Natural and Biomimetic Drugs , School of Pharmaceutical Sciences , Peking University , No. 38, Xueyuan Rd , Beijing 100191 , China .
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8
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Weyel XMM, Fichte MAH, Heckel A. A Two-Photon-Photocleavable Linker for Triggering Light-Induced Strand Breaks in Oligonucleotides. ACS Chem Biol 2017; 12:2183-2190. [PMID: 28678467 DOI: 10.1021/acschembio.7b00367] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We synthesized a two-photon-sensitive photocleavable linker based on the 7-diethylaminocoumarin structure and introduced it successfully into DNA strands. First, we demonstrated the inducibility of strand scissions upon irradiation at 365 nm. To verify and visualize the two-photon activity, we used a fluorescence assay based on a DNA strand displacement immobilized in a hydrogel. Additionally, we investigated its use in a new class of DNA decoys that are able to catch and release nuclear factor κB (NF-κB) by using light as an external trigger signal. In cell culture we were able to show the regulation of NF-κB-controlled transcription of green fluorescent protein.
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Affiliation(s)
- Xenia M M Weyel
- Institute of Organic Chemistry and Chemical Biology, Goethe-University Frankfurt , Max-von-Laue-Straße 9, 60438 Frankfurt am Main, Germany
| | - Manuela A H Fichte
- Institute of Organic Chemistry and Chemical Biology, Goethe-University Frankfurt , Max-von-Laue-Straße 9, 60438 Frankfurt am Main, Germany
| | - Alexander Heckel
- Institute of Organic Chemistry and Chemical Biology, Goethe-University Frankfurt , Max-von-Laue-Straße 9, 60438 Frankfurt am Main, Germany
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9
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Ogasawara S. Duration Control of Protein Expression in Vivo by Light-Mediated Reversible Activation of Translation. ACS Chem Biol 2017; 12:351-356. [PMID: 28049292 DOI: 10.1021/acschembio.6b00684] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The photocontrol of protein expression enables the spatiotemporal induction of biological events in living cells or organisms. However, commonly used method such as photocontrollable transcription factor or caged nucleic acids is unsuitable for precise control of the duration of protein expression. Here, I report a photocontrollable cap (PC-cap) that can control the translation of mRNA in a reversible manner via its cis-trans photoisomerization through illumination with 370 and 430 nm light. 2-meta-Methyl-phenylazo cap (mMe-2PA-cap) in the trans form silences translation in zebrafish embryo, whereas treatment with the cis form provided a 7.1 times larger amount of translated protein compared to the trans form. Moreover, translation activated by illumination of the embryo with 370 nm light was rapidly inactivated again by subsequent illumination with 430 nm light. An application of this approach was demonstrated by photoinducing the development of double-headed zebrafish by controlling the expression period of squint protein.
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Affiliation(s)
- Shinzi Ogasawara
- Creative Research Institution
Sousei, Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- PRESTO, Japan Science and Technology Agency, 4-1-8
Honcho, Kawaguchi, Saitama 332-0012, Japan
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10
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Tan Z, Feagin TA, Heemstra JM. Temporal Control of Aptamer Biosensors Using Covalent Self-Caging To Shift Equilibrium. J Am Chem Soc 2016; 138:6328-31. [PMID: 27159220 DOI: 10.1021/jacs.6b00934] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Aptamer-based sensors provide a versatile and effective platform for the detection of chemical and biological targets. These sensors have been optimized to function in multiple formats, however, a remaining limitation is the inability to achieve temporal control over their sensing function. To overcome this challenge, we took inspiration from nature's ability to temporally control the activity of enzymes and protein receptors through covalent self-caging. We applied this strategy to structure-switching aptamer sensors through the installation of a cleavable linker between the two DNA fragments that comprise the sensor. Analogous to self-caged proteins, installation of this linker shifts the equilibrium of the aptamer sensor to disfavor target binding. However, activity can be restored in a time-resolved manner by cleavage of the linker. To demonstrate this principle, we chose a photocleavable linker and found that installation of the linker eliminates target binding, even at high target concentrations. However, upon irradiation with 365 nm light, sensor activity is restored with response kinetics that mirror those of the linker cleavage reaction. A key benefit of our approach is generality, which is demonstrated by grafting the photocleavable linker onto a different aptamer sensor and showing that an analogous level of temporal control can be achieved for sensing of the new target molecule. These results demonstrate that nature's self-caging approach can be effectively applied to non-natural receptors to provide precise temporal control over function. We envision that this will be of especially high utility for deploying aptamer sensors in biological environments.
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Affiliation(s)
- Zhesen Tan
- Department of Chemistry and the Center for Cell and Genome Science, University of Utah , Salt Lake City, Utah 84112, United States
| | - Trevor A Feagin
- Department of Chemistry and the Center for Cell and Genome Science, University of Utah , Salt Lake City, Utah 84112, United States
| | - Jennifer M Heemstra
- Department of Chemistry and the Center for Cell and Genome Science, University of Utah , Salt Lake City, Utah 84112, United States
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11
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Wu L, He Y, Tang X. Photoregulating RNA digestion using azobenzene linked dumbbell antisense oligodeoxynucleotides. Bioconjug Chem 2015; 26:1070-9. [PMID: 25961679 DOI: 10.1021/acs.bioconjchem.5b00125] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Introduction of 4,4'-bis(hydroxymethyl)-azobenzene (azo) to dumbbell hairpin oligonucleotides at the loop position was able to reversibly control the stability of the whole hairpin structure via UV or visible light irradiation. Here, we designed and synthesized a series of azobenzene linked dumbbell antisense oligodeoxynucleotides (asODNs) containing two terminal hairpins that are composed of an asODN and a short inhibitory sense strand. Thermal melting studies of these azobenzene linked dumbbell asODNs indicated that efficient trans to cis photoisomerization of azobenzene moieties induced large difference in thermal stability (ΔTm = 12.1-21.3 °C). In addition, photomodulation of their RNA binding abilities and RNA digestion by RNase H was investigated. The trans-azobenzene linked asODNs with the optimized base pairs between asODN strands and inhibitory sense strands could only bind few percentage of the target RNA, while it was able to recover their binding to the target RNA and degrade it by RNase H after light irradiation. Upon optimization, it is promising to use these azobenzene linked asODNs for reversible spatial and temporal regulation of antisense activities based on both steric binding and RNA digestion by RNase H.
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Affiliation(s)
- Li Wu
- †School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.,‡State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Yujian He
- †School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.,‡State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Xinjing Tang
- ‡State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
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12
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Panja S, Paul R, Greenberg MM, Woodson SA. Light-Triggered RNA Annealing by an RNA Chaperone. Angew Chem Int Ed Engl 2015; 54:7281-4. [PMID: 25959666 DOI: 10.1002/anie.201501658] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 03/18/2015] [Indexed: 12/28/2022]
Abstract
Non-coding antisense RNAs regulate bacterial genes in response to nutrition or environmental stress, and can be engineered for artificial gene control. The RNA chaperone Hfq accelerates antisense pairing between non-coding RNAs and their mRNA targets, by a mechanism still unknown. We used a photocaged guanosine derivative in an RNA oligonucleotide to temporally control Hfq catalyzed annealing. Using a fluorescent molecular beacon as a reporter, we observed RNA duplex formation within 15 s following irradiation (3 s) of photocaged RNA complexed with Hfq. The results showed that the Hfq chaperone directly stabilizes the initiation of RNA base pairs, and suggests a strategy for light-activated control of gene expression by non-coding RNAs.
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Affiliation(s)
- Subrata Panja
- T.C. Jenkins Department of Biophysics, Johns Hopkins University, 3400 N. Charles St., Baltimore MD 21218 (USA)
| | - Rakesh Paul
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore MD 21218 (USA)
| | - Marc M Greenberg
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore MD 21218 (USA).
| | - Sarah A Woodson
- T.C. Jenkins Department of Biophysics, Johns Hopkins University, 3400 N. Charles St., Baltimore MD 21218 (USA).
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13
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Panja S, Paul R, Greenberg MM, Woodson SA. Light-Triggered RNA Annealing by an RNA Chaperone. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501658] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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14
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Griepenburg JC, Rapp TL, Carroll PJ, Eberwine J, Dmochowski IJ. Ruthenium-Caged Antisense Morpholinos for Regulating Gene Expression in Zebrafish Embryos. Chem Sci 2015; 6:2342-2346. [PMID: 26023327 PMCID: PMC4443914 DOI: 10.1039/c4sc03990d] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 01/29/2015] [Indexed: 11/25/2022] Open
Abstract
Photochemical approaches afford high spatiotemporal control over molecular structure and function, for broad applications in materials and biological science. Here, we present the first example of a visible light responsive ruthenium-based photolinker, Ru(bipyridine)2(3-ethynylpyridine)2 (RuBEP), which was reacted stoichiometrically with a 25mer DNA or morpholino (MO) oligonucleotide functionalized with 3' and 5' terminal azides, via Cu(I)-mediated [3+2] Huisgen cycloaddition reactions. RuBEP-caged circular morpholinos (Ru-MOs) targeting two early developmental zebrafish genes, chordin and notail, were synthesized and tested in vivo. One-cell-stage zebrafish embryos microinjected with Ru-MO and incubated in the dark for 24 h developed normally, consistent with caging, whereas irradiation at 450 nm dissociated one 3-ethynylpyridine ligand (ϕ = 0.33) and uncaged the MO to achieve gene knockdown. As demonstrated, Ru photolinkers provide a versatile method for controlling structure and function of biopolymers.
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Affiliation(s)
- Julianne C. Griepenburg
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , USA .
| | - Teresa L. Rapp
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , USA .
| | - Patrick J. Carroll
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , USA .
| | - James Eberwine
- Department of Systems Pharmacology and Experimental Therapeutics , Perelman School of Medicine , University of Pennsylvania , 37 John Morgan Building, 3620 Hamilton Walk , Philadelphia , Pennsylvania 19104 , USA
| | - Ivan J. Dmochowski
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , USA .
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15
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Caged oligonucleotides for studying biological systems. J Inorg Biochem 2015; 150:182-8. [PMID: 25865001 DOI: 10.1016/j.jinorgbio.2015.03.010] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 03/17/2015] [Accepted: 03/18/2015] [Indexed: 01/08/2023]
Abstract
Light-activated ("caged") compounds have been widely employed for studying biological processes with high spatial and temporal control. In the past decade, several new approaches for caging the structure and function of DNA and RNA oligonucleotides have been developed. This review focuses on caged oligonucleotides that incorporate site-specifically one or two photocleavable linkers, whose photolysis yields oligonucleotides with dramatic structural and functional changes. This technique has been employed by our laboratory and others to photoregulate gene expression in cells and living organisms, typically using near UV-activated organic chromophores. To improve capabilities for in vivo studies, we harnessed the rich inorganic photochemistry of ruthenium bipyridyl complexes to synthesize Ru-caged morpholino antisense oligonucleotides that remain inactive in zebrafish embryos until uncaged with visible light. Expanding into new caged oligonucleotide applications, our lab has developed Transcriptome In Vivo Analysis (TIVA) technology, which provides the first noninvasive, unbiased method for isolating mRNA from single neurons in brain tissues. TIVA-isolated mRNA can be amplified and then analyzed using next-generation sequencing (RNA-seq).
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Marcélis L, Van Overstraeten-Schlögel N, Lambermont J, Bontems S, Spinelli N, Defrancq E, Moucheron C, Kirsch-De Mesmaeker A, Raes M. Light-Triggered Green Fluorescent Protein Silencing in Human Keratinocytes in Culture Using Antisense Oligonucleotides Coupled to a Photoreactive Ruthenium(II) Complex. Chempluschem 2014. [DOI: 10.1002/cplu.201402212] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Griepenburg JC, Ruble BK, Dmochowski IJ. Caged oligonucleotides for bidirectional photomodulation of let-7 miRNA in zebrafish embryos. Bioorg Med Chem 2013; 21:6198-204. [PMID: 23721917 PMCID: PMC3789856 DOI: 10.1016/j.bmc.2013.04.082] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 04/20/2013] [Accepted: 04/30/2013] [Indexed: 12/17/2022]
Abstract
Many biological functions of microRNA (miRNA) have been identified in the past decade. However, a single miRNA can regulate multiple gene targets, thus it has been a challenge to elucidate the specific functions of each miRNA in different locations and times. New chemical tools make it possible to modulate miRNA activity with higher spatiotemporal resolution. Here, we describe light-activated (caged) constructs for switching let-7 miRNA 'on' or 'off' with 365 nm light in developing zebrafish embryos.
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Affiliation(s)
- Julianne C. Griepenburg
- Department of Chemistry, University of Pennsylvania, 231 S.34th Street, Philadelphia, PA 19104 USA
| | - Brittani K. Ruble
- Department of Chemistry, University of Pennsylvania, 231 S.34th Street, Philadelphia, PA 19104 USA
| | - Ivan J. Dmochowski
- Department of Chemistry, University of Pennsylvania, 231 S.34th Street, Philadelphia, PA 19104 USA
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Wu L, Wang Y, Wu J, Lv C, Wang J, Tang X. Caged circular antisense oligonucleotides for photomodulation of RNA digestion and gene expression in cells. Nucleic Acids Res 2012; 41:677-86. [PMID: 23104375 PMCID: PMC3592401 DOI: 10.1093/nar/gks996] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
We synthesized three 20mer caged circular antisense oligodeoxynucleotides (R20, R20B2 and R20B4) with a photocleavable linker and an amide bond linker between two 10mer oligodeoxynucleotides. With these caged circular antisense oligodeoxynucleotides, RNA-binding affinity and its digestion by ribonuclease H were readily photomodulated. RNA cleavage rates were upregulated ∼43-, 25- and 15-fold for R20, R20B2 and R20B4, respectively, upon light activation in vitro. R20B2 and R20B4 with 2- or 4-nt gaps in the target RNA lost their ability to bind the target RNA even though a small amount of RNA digestion was still observed. The loss of binding ability indicated promising gene photoregulation through a non-enzymatic strategy. To test this strategy, three caged circular antisense oligonucleotides (PS1, PS2 and PS3) with 2′-OMe RNA and phosphorothioate modifications were synthesized to target GFP expression. Upon light activation, photomodulation of target hybridization and GFP expression in cells was successfully achieved with PS1, PS2 and PS3. These caged circular antisense oligonucleotides show promising applications of photomodulating gene expression through both ribonuclease H and non-enzyme involved antisense strategies.
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Affiliation(s)
- Li Wu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, No 38 Xueyuan Road, Haidian District, Beijing 100191, China
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Wang Y, Wu L, Wang P, Lv C, Yang Z, Tang X. Manipulation of gene expression in zebrafish using caged circular morpholino oligomers. Nucleic Acids Res 2012; 40:11155-62. [PMID: 23002141 PMCID: PMC3505977 DOI: 10.1093/nar/gks840] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Morpholino oligomers (MOs) have been widely used to knock down specific genes in zebrafish, but their constitutive activities limit their experimental applications for studying a gene with multiple functions or within a gene network. We report herein a new design and synthesis of caged circular MOs (caged cMOs) with two ends linked by a photocleavable moiety. These caged cMOs were successfully used to photomodulate β-catenin-2 and no tail expression in zebrafish embryos.
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Affiliation(s)
- Yuan Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, No. 38, Xueyuan Road, Beijing 100191, China
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Resendiz MJE, Schön A, Freire E, Greenberg MM. Photochemical control of RNA structure by disrupting π-stacking. J Am Chem Soc 2012; 134:12478-81. [PMID: 22827464 DOI: 10.1021/ja306304w] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Photolabile nucleotides that disrupt nucleic acid structure are useful mechanistic probes and can be used as tools for regulating biochemical processes. Previous probes can be limited by the need to incorporate multiple modified nucleotides into oligonucleotides and in kinetic studies by the rate-limiting step in the conversion to the native nucleotide. Photolysis of aryl sulfide 1 produces high yields of 5-methyluridine, and product formation is complete in less than a microsecond. Aryl sulfide 1 prevents RNA hairpin formation and complete folding of the preQ(1) class I riboswitch. Proper folding is achieved in each instance upon photolysis at 350 nm. Aryl sulfide 1 is a novel tool for modulating RNA structure, and formation of 5-methyluridine within a radical cage suggests that it will be useful in kinetic studies.
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Affiliation(s)
- Marino J E Resendiz
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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Brieke C, Rohrbach F, Gottschalk A, Mayer G, Heckel A. Light-controlled tools. Angew Chem Int Ed Engl 2012; 51:8446-76. [PMID: 22829531 DOI: 10.1002/anie.201202134] [Citation(s) in RCA: 738] [Impact Index Per Article: 61.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Indexed: 12/21/2022]
Abstract
Spatial and temporal control over chemical and biological processes plays a key role in life, where the whole is often much more than the sum of its parts. Quite trivially, the molecules of a cell do not form a living system if they are only arranged in a random fashion. If we want to understand these relationships and especially the problems arising from malfunction, tools are necessary that allow us to design sophisticated experiments that address these questions. Highly valuable in this respect are external triggers that enable us to precisely determine where, when, and to what extent a process is started or stopped. Light is an ideal external trigger: It is highly selective and if applied correctly also harmless. It can be generated and manipulated with well-established techniques, and many ways exist to apply light to living systems--from cells to higher organisms. This Review will focus on developments over the last six years and includes discussions on the underlying technologies as well as their applications.
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Affiliation(s)
- Clara Brieke
- Goethe University Frankfurt, Institute for Organic Chemistry and Chemical Biology Buchmann Institute for Molecular Life Sciences, Max-von-Laue-Strasse 9, 60438 Frankfurt/Main, Germany
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Brieke C, Rohrbach F, Gottschalk A, Mayer G, Heckel A. Lichtgesteuerte Werkzeuge. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202134] [Citation(s) in RCA: 225] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Clara Brieke
- Goethe‐Universität Frankfurt, Institut für Organische Chemie und Chemische Biologie, Buchmann‐Institut für Molekulare Lebenswissenschaften, Max‐von‐Laue‐Straße 9, 60438 Frankfurt/Main (Deutschland)
| | - Falk Rohrbach
- Universität Bonn, LIMES‐Institut, Gerhard‐Domagk‐Straße 1, 53121 Bonn (Deutschland)
| | - Alexander Gottschalk
- Buchmann‐Institut für Molekulare Lebenswissenschaften, Institut für Biochemie, Max‐von‐Laue‐Straße 15, 60438 Frankfurt/Main (Deutschland)
| | - Günter Mayer
- Universität Bonn, LIMES‐Institut, Gerhard‐Domagk‐Straße 1, 53121 Bonn (Deutschland)
| | - Alexander Heckel
- Goethe‐Universität Frankfurt, Institut für Organische Chemie und Chemische Biologie, Buchmann‐Institut für Molekulare Lebenswissenschaften, Max‐von‐Laue‐Straße 9, 60438 Frankfurt/Main (Deutschland)
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Zhou G, Khan F, Dai Q, Sylvester JE, Kron SJ. Photocleavable peptide-oligonucleotide conjugates for protein kinase assays by MALDI-TOF MS. MOLECULAR BIOSYSTEMS 2012; 8:2395-404. [PMID: 22772337 DOI: 10.1039/c2mb25163a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Robust methods for highly parallel, quantitative analysis of cellular protein tyrosine kinase activities may provide tools critically needed to decipher oncogenic signaling, discover new targeted drugs, diagnose cancer and monitor patients. Here, we describe proof-of-principle for a novel protein kinase assay with the potential to help overcome these challenges. MALDI-TOF mass spectrometry provides an ideal tool for label-free multiplexed analysis of peptide phosphorylation, but is poorly matched to homogeneous assays and complex samples. Thus, we conjugated a common oligonucleotide tag to multiple peptide substrates, offering efficient capture from solution-phase kinase reactions by annealing to the complementary sequence tethered to PEG-passivated superparamagnetic microparticles. To enable reversible conjugation, we developed a novel bifunctional cross-linker allowing simple and efficient preparation of photocleavable peptide-oligonucleotide conjugates. After washing away contaminants and following photorelease, MALDI-TOF analysis yielded relative phosphorylation of each peptide with high sensitivity and specificity. Validating the hybridization-mediated multiplexed kinase assay, when three peptide substrate-oligonucleotide conjugates were mixed with the tyrosine kinase c-Abl and ATP, we readily observed their differential phosphorylation yet measured a common IC(50) for the Abl kinase inhibitor imatinib. This new assay enables analysis of protein kinase activities in a multiplexed format amenable to screening inhibitors against multiple kinases in parallel, an important capability for drug discovery and predictive diagnostics.
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Affiliation(s)
- Guangchang Zhou
- Department of Molecular Genetics and Cell Biology, Gordon Center for Integrative Sciences, W522A, The University of Chicago, Chicago, IL 60637, USA
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Li WH, Zheng G. Photoactivatable fluorophores and techniques for biological imaging applications. Photochem Photobiol Sci 2012; 11:460-71. [PMID: 22252510 PMCID: PMC3677749 DOI: 10.1039/c2pp05342j] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Accepted: 11/28/2011] [Indexed: 11/21/2022]
Abstract
Photoactivatable fluorophores (PAFs) are powerful imaging probes for tracking molecular and cellular dynamics with high spatiotemporal resolution in biological systems. Recent developments in biological microscopy have raised new demands for engineering new PAFs with improved properties, such as high two photon excitation efficiency, reversibility, cellular delivery and targeting. Here we review the history and some of the recent developments in this area, emphasizing our efforts in developing a new class of caged coumarins and related imaging methods for studying dynamic cell-cell communication through gap junction channels, and in extending the application of these caged coumarins to new areas including spatiotemporal control of microRNA activity in vivo.
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Affiliation(s)
- Wen-hong Li
- Departments of Cell Biology and of Biochemistry, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, USA.
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25
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Ceo LM, Koh JT. Photocaged DNA provides new levels of transcription control. Chembiochem 2012; 13:511-3. [PMID: 22271631 DOI: 10.1002/cbic.201100683] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Indexed: 12/24/2022]
Abstract
Spot lit: photocaged nucleic acids have been used to regulate gene expression through the action of light. Whereas most methods target mRNAs, DNA decoys have recently been used to target DNA transcription by targeting specific DNA-transcription-factor interactions. This has allowed researchers to "turn-off" transcription through the action of light on caged nucleic acids for the first time.
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Affiliation(s)
- Luke M Ceo
- Department of Chemistry and Biochemistry, University of Delaware, Brown Laboratories, USA
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26
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Ruble BK, Richards JL, Cheung-Lau JC, Dmochowski IJ. Mismatch Discrimination and Efficient Photomodulation with Split 10-23 DNAzymes. Inorganica Chim Acta 2012; 380:386-391. [PMID: 22544974 PMCID: PMC3337724 DOI: 10.1016/j.ica.2011.10.068] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
DNA enzymes (DNAzymes) that catalyze the degradation of complementary RNA molecules have been investigated for many biochemical and sensing applications. Here, we investigated a 10-23 DNAzyme that has been shown previously to possess cellular activity. We determined that it has very low Mg(2+) ion dependence, with DNAzyme activity observed at [Mg(2+)] = 0.01 mM. This metal ion dependence is much lower than is typical for DNAzymes studied to date, and suggests that DNAzymes may be engineered for many additional biological applications. Recently, we demonstrated that this 10-23 DNAzyme can be divided into two parts, which assemble into an active oligonucleotide complex. We investigated in more detail the functionality of the split 10-23 DNAzyme and found that dividing the 15-nucleotide catalytic loop after the 7(th) or 8(th) base maximized its activity. The split DNAzymes required higher metal ion concentrations ([Mg(2+)] = 5 mM), and as we anticipated due to their lower hybridization activity, the split enzymes had the advantage of being more sensitive to single base mismatches in the DNAzyme-RNA duplex. Finally, we demonstrated facile photomodulation of split DNAzyme activity by incorporating a photocleavable biotin moiety bound to streptavidin.
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Affiliation(s)
- Brittani K Ruble
- Department of Chemistry, University of Pennsylvania, 231 S. 34 Street, Philadelphia, PA 19104
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Ogasawara S, Maeda M. Photoresponsive 5'-cap for the reversible photoregulation of gene expression. Bioorg Med Chem Lett 2011; 21:5457-9. [PMID: 21783365 DOI: 10.1016/j.bmcl.2011.06.119] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 06/24/2011] [Accepted: 06/28/2011] [Indexed: 11/16/2022]
Abstract
Photoresponsive 5'-caps that can be reversibly cis-trans isomerized by light irradiation were developed for the reversible photoregulation of gene expression. The 8-naphthylvinyl cap (8NV-cap) in the trans form completely inhibited translation of mRNA, whereas the cis form yielded protein with the same efficiency as mRNA capped with the normal-cap, a 26-fold higher efficiency than that of the trans form. The 8NV-capped mRNA could be switched between a translating state (ON state) and a non-translating state (OFF state) in a reversible fashion by alternately irradiating with monochromatic 410 nm or 310 nm light.
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Affiliation(s)
- Shinzi Ogasawara
- Innovative use of Light and Materials/Life, JST-PRESTO, Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan.
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Lusic H, Uprety R, Deiters A. Improved synthesis of the two-photon caging group 3-nitro-2-ethyldibenzofuran and its application to a caged thymidine phosphoramidite. Org Lett 2010; 12:916-9. [PMID: 20112966 DOI: 10.1021/ol902807q] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new and efficient route to the recently reported 3-nitro-2-ethyldibenzofuran caging group was developed. Furthermore, its installation on a thymidine phosphoramidite is described. This caging group is efficiently removed through light-irradiation at 365 nm.
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Affiliation(s)
- Hrvoje Lusic
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, USA
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29
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Li YM, Shi J, Cai R, Chen X, Luo ZF, Guo QX. New quinoline-based caging groups synthesized for photo-regulation of aptamer activity. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2010.02.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Furukawa K, Abe H, Tsuneda S, Ito Y. Photoactivatable fluorescein derivatives with azidomethyl caging groups for tracing oligonucleotides in living human cells. Org Biomol Chem 2010; 8:2309-11. [PMID: 20448888 DOI: 10.1039/b926100a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new photocaged fluorescent compound, azidomethyl fluorescein, was successfully utilized to monitor the dynamics of oligonucleotides in living human cells.
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Affiliation(s)
- Kazuhiro Furukawa
- Nano Medical Engineering Laboratory, RIKEN Advanced Science Institute, 2-1, Hirosawa, Wako-Shi, Saitama 351-0198, Japan
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Tang X, Su M, Yu L, Lv C, Wang J, Li Z. Photomodulating RNA cleavage using photolabile circular antisense oligodeoxynucleotides. Nucleic Acids Res 2010; 38:3848-55. [PMID: 20164090 PMCID: PMC2887953 DOI: 10.1093/nar/gkq079] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Caged antisense oligodeoxynucleotides (asODNs) are synthesized by linking two ends of linear oligodeoxynucleotides using a photocleavable linker. Two of them (H30 and H40) have hairpin-like structures which show a large difference in thermal stability (ΔTm = 17.5°C and 11.6°C) comparing to uncaged ones. The other three (C20, C30 and C40) without stable secondary structures have the middle 20 deoxynucleotides complementary to 40-mer RNA. All caged asODNs have restricted opening which provides control over RNA/asODN interaction. RNase H assay results showed that 40-mer RNA digestion could be photo-modulated 2- to 3-fold upon light-activation with H30, H40, C30 and C40, while with C20, RNA digestion was almost not detectable; however, photo-activation triggered >20-fold increase of RNA digestion. And gel shift assays showed that it needed >0.04 μM H40 and 0.5 μM H30 to completely bind 0.02 μM 40-mer RNA, and for C40 and C30, it needed >0.2 μM and 0.5 μM for 0.02 μM 40-mer RNA binding. However, even 4 μM C20 was not able to fully bind the same concentration of 40-mer RNA. By simple adjustment of ring size of caged asODNs, we could successfully photoregulate their hybridization with mRNA and target RNA hydrolysis by RNase H with light activation.
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Affiliation(s)
- XinJing Tang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University No. 38, Xueyuan Rd, Beijing 100191, China.
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Richards JL, Seward GK, Wang YH, Dmochowski IJ. Turning the 10-23 DNAzyme on and off with light. Chembiochem 2010; 11:320-4. [PMID: 20077457 PMCID: PMC2908382 DOI: 10.1002/cbic.200900702] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Indexed: 11/10/2022]
Affiliation(s)
- Julia L. Richards
- Department of Chemistry, University of Pennsylvania, 231 South 34 St., Philadelphia, PA 19104-6323 (USA), Fax: (+1) 215-573-6329
| | - Garry K. Seward
- Department of Chemistry, University of Pennsylvania, 231 South 34 St., Philadelphia, PA 19104-6323 (USA), Fax: (+1) 215-573-6329
| | - Yu-Hsiu Wang
- Department of Chemistry, University of Pennsylvania, 231 South 34 St., Philadelphia, PA 19104-6323 (USA), Fax: (+1) 215-573-6329
| | - Ivan J. Dmochowski
- Department of Chemistry, University of Pennsylvania, 231 South 34 St., Philadelphia, PA 19104-6323 (USA), Fax: (+1) 215-573-6329
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33
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Shao Q, Xing B. Photoactive molecules for applications in molecular imaging and cell biology. Chem Soc Rev 2010; 39:2835-46. [DOI: 10.1039/b915574k] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li Y, Shi J, Luo Z, Jiang H, Chen X, Wang F, Wu X, Guo Q. Photoregulation of thrombin aptamer activity using Bhc caging strategy. Bioorg Med Chem Lett 2009; 19:5368-71. [PMID: 19682894 DOI: 10.1016/j.bmcl.2009.07.128] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 07/26/2009] [Accepted: 07/28/2009] [Indexed: 11/28/2022]
Abstract
Thrombin aptamer was attempted to cage with Bhc (6-bromo-7-hydroxycoumarin-4-ylmethyl) group for controlling its specific affinity to target molecular through photolysis. By multiple-caging strategy, aptamer could be rendered biologically inert and partially restored with subsequently illumination. This provides a convenient method for photoregulating aptamer activity with exact spatiotemporal resolution.
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Affiliation(s)
- Yiming Li
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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35
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Shah S, Jain PK, Kala A, Karunakaran D, Friedman SH. Light-activated RNA interference using double-stranded siRNA precursors modified using a remarkable regiospecificity of diazo-based photolabile groups. Nucleic Acids Res 2009; 37:4508-17. [PMID: 19477960 PMCID: PMC2715251 DOI: 10.1093/nar/gkp415] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Diazo-based precursors of photolabile groups have been used extensively for modifying nucleic acids, with the intention of toggling biological processes with light. These processes include transcription, translation and RNA interference. In these cases, the photolabile groups have been typically depicted as modifying the phosphate backbone of RNA and DNA. In this work we find that these diazo-based reagents in fact react very poorly with backbone phosphates. Instead, they show a remarkable specificity for terminal phosphates and very modest modification of the nucleobases. Furthermore, the photo deprotection of these terminal modifications is shown to be much more facile than nucleobase modified sites. In this study we have characterized this regiospecificity using RNA duplexes and model nucleotides, analyzed using LC/MS/MS. We have also applied this understanding of the regio-specificity to our technique of light activated RNA interference (LARI). We examined 27-mer double-stranded precursors of siRNA (‘dsRNA’), and have modified them using the photo-cleavable di-methoxy nitro phenyl ethyl group (DMNPE) group. By incorporating terminal phosphates in the dsRNA, we are able to guide DMNPE to react at these terminal locations. These modified dsRNA duplexes show superior performance to our previously described DMNPE-modified siRNA, with the range of expression that can be toggled by light increasing by a factor of two.
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Affiliation(s)
- Samit Shah
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, Kansas City, MO 64110, USA
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36
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Casey JP, Blidner RA, Monroe WT. Caged siRNAs for Spatiotemporal Control of Gene Silencing. Mol Pharm 2009; 6:669-85. [DOI: 10.1021/mp900082q] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- John P. Casey
- Department of Biological and Agricultural Engineering, Louisiana State University and the LSU Agricultural Center, Baton Rouge, Louisiana 70803
| | - Richard A. Blidner
- Department of Biological and Agricultural Engineering, Louisiana State University and the LSU Agricultural Center, Baton Rouge, Louisiana 70803
| | - W. Todd Monroe
- Department of Biological and Agricultural Engineering, Louisiana State University and the LSU Agricultural Center, Baton Rouge, Louisiana 70803
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37
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Young DD, Lusic H, Lively MO, Yoder JA, Deiters A. Gene silencing in mammalian cells with light-activated antisense agents. Chembiochem 2009; 9:2937-40. [PMID: 19021142 DOI: 10.1002/cbic.200800627] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Douglas D Young
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA
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Richards JL, Tang X, Turetsky A, Dmochowski IJ. RNA bandages for photoregulating in vitro protein synthesis. Bioorg Med Chem Lett 2008; 18:6255-8. [PMID: 18926697 PMCID: PMC2593108 DOI: 10.1016/j.bmcl.2008.09.093] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 09/24/2008] [Accepted: 09/26/2008] [Indexed: 11/24/2022]
Abstract
'RNA bandages' are composed of two 6-12-mer 2'-OMe RNA strands complementary to a mRNA target that are joined by a photocleavable linker. These tandem oligonucleotides typically exhibit much higher affinity for the mRNA than the individual strands. An RNA bandage with binding arms of different lengths and a 4-base gap blocked translation in vitro of GFP mRNA; subsequent near-UV irradiation restored translation. This provides a general method of photomodulating hybridization for a variety of oligonucleotide-based technologies.
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Affiliation(s)
- Julia L. Richards
- Department of Chemistry, 231 S. 34 St., University of Pennsylvania, Philadelphia, PA 19104-6323, USA
| | - XinJing Tang
- Department of Chemistry, 231 S. 34 St., University of Pennsylvania, Philadelphia, PA 19104-6323, USA
| | - Anna Turetsky
- Department of Chemistry, 231 S. 34 St., University of Pennsylvania, Philadelphia, PA 19104-6323, USA
| | - Ivan J. Dmochowski
- Department of Chemistry, 231 S. 34 St., University of Pennsylvania, Philadelphia, PA 19104-6323, USA
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Katayama K, Tsukiji S, Furuta T, Nagamune T. A bromocoumarin-based linker for synthesis of photocleavable peptidoconjugates with high photosensitivity. Chem Commun (Camb) 2008:5399-401. [PMID: 18985223 DOI: 10.1039/b812058g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new bromocoumarin-based bi-functional linker was developed for preparing photocleavable peptides and proteins with high photolytic efficiency, which have many potential applications in the study and engineering of biological systems.
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Affiliation(s)
- Kentaro Katayama
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
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40
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Lusic H, Lively MO, Deiters A. Light-activated deoxyguanosine: photochemical regulation of peroxidase activity. MOLECULAR BIOSYSTEMS 2008; 4:508-11. [PMID: 18493645 DOI: 10.1039/b800166a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photochemical activation of a deoxyribozyme with peroxidase activity was achieved by the synthesis and incorporation of a caged deoxyguanosine.
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Affiliation(s)
- Hrvoje Lusic
- North Carolina State University, Department of Chemistry, Raleigh, NC 27695, USA
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41
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Tang X, Swaminathan J, Gewirtz AM, Dmochowski IJ. Regulating gene expression in human leukemia cells using light-activated oligodeoxynucleotides. Nucleic Acids Res 2007; 36:559-69. [PMID: 18056083 PMCID: PMC2241881 DOI: 10.1093/nar/gkm1029] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Light-activated antisense oligodeoxynucleotides (asODNs) were developed to control the degradation of target mRNA in living cells by RNase H. A 20-mer asODN previously shown to target c-myb, a hematopoietic transcription factor, was covalently attached via a photocleavable linker (PL) to partially complementary 20-mer sense strands (sODNs). In the ‘caged’ state, the sODN blocked hybridization of the asODN to c-myb mRNA. Six asODN-PL-sODN conjugates, C1-C6, were synthesized. C5, with twelve complementary bases, gave the largest decrease in melting temperature (Tm) upon UV irradiation (ΔTm = −29°C). The most thermally stable conjugate, C6 (Tm = 84°C), gave the lowest background RNase H activity, with just 8.6% degradation of an RNA 40-mer after 1 h incubation. In biochemical assays with C6, RNA digestion increased 10-fold 10 min after UV irradiation. Finally, phosphorothioated analogs S-C5 and S-C6 were synthesized to test activity in cultured K562 (human leukemia) cells. No knockdown of c-myb mRNA or protein was observed with intact S-C5 or S-C6, whereas more than half of c-myb mRNA was degraded 24 h after photoactivation. Two-fold photomodulation of c-MYB protein levels was also observed with S-C5. However, no photomodulation of c-MYB protein levels was observed with S-C6, perhaps due to the greater stability of this duplex.
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Affiliation(s)
- XinJing Tang
- The Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
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42
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Abstract
The activity of a 20-mer antisense oligodeoxynucleotide (asODN) is transiently blocked by attaching a partially complementary sense strand (sODN) via a heterobifunctional photocleavable linker (PL). The asODN-PL-sODN conjugate forms a DNA hairpin-like structure that is considerably more stable than the corresponding asODN/sODN duplex. In conjugate form, the asODN is prevented from hybridizing to exogenous RNA or DNA molecules. Activity is restored after modest exposure to UV light (lambda approximately 365 nm). Here, we provide a detailed procedure for synthesizing photoactive asODNs in good yields. Synthesis, purification and analysis of the light-activated asODN can be completed within 1-2 weeks.
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Affiliation(s)
- XinJing Tang
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, USA
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43
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Dmochowski IJ, Tang X. Taking control of gene expression with light-activated oligonucleotides. Biotechniques 2007; 43:161, 163, 165 passim. [PMID: 17824383 DOI: 10.2144/000112519] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The recent development of caged oligonucletides that are efficiently activated by ultraviolet (UV) light creates opportunities for regulating gene expression with very high spatial and temporal resolution. By selectively modulating gene activity, these photochemical tools will facilitate efforts to elucidate gene function and may eventually serve therapeutic aims. We demonstrate how the incorporation of a photocleavable blocking group within a DNA duplex can transiently arrest DNA polymerase activity. Indeed, caged oligonucleotides make it possible to control many different protein-oligonucleotide interactions. In related experiments, hybridization of a reverse complementary (antisense) oligodeoxynucleotide to target mRNA can inhibit translation by recruiting endogenous RNases or sterically blocking the ribosome. Our laboratory recently synthesized caged antisense oligonucleotides composed of phosphorothioated DNA or peptide nucleic acid (PNA). The antisense oligonucleotide, which was attached to a complementary blocking oligonucleotide strand by a photocleavable linker, was blocked from binding target mRNA. This provided a useful method for photomodulating hybridization of the antisense strand to target mRNA. Caged DNA and PNA oligonucleotides have proven effective at photoregulating gene expression in cells and zebrafish embryos.
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Affiliation(s)
- Ivan J Dmochowski
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA
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44
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Rotaru A, Mokhir A. Nucleic acid binders activated by light of selectable wavelength. Angew Chem Int Ed Engl 2007; 46:6180-3. [PMID: 17623284 DOI: 10.1002/anie.200700641] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexandru Rotaru
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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45
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Shestopalov IA, Sinha S, Chen JK. Light-controlled gene silencing in zebrafish embryos. Nat Chem Biol 2007; 3:650-1. [PMID: 17717538 DOI: 10.1038/nchembio.2007.30] [Citation(s) in RCA: 182] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2007] [Accepted: 07/27/2007] [Indexed: 11/09/2022]
Abstract
Functional genomic studies in zebrafish frequently use synthetic oligonucleotides called morpholinos that block RNA splicing or translation. However, the constitutive activity of these reagents limits their experimental utility. We report here the synthesis of a photoactivatable morpholino targeting the no tail (ntl) gene. This caged reagent permits spatiotemporal gene regulation in vivo and the photochemical generation of functionally mosaic organisms.
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Affiliation(s)
- Ilya A Shestopalov
- Department of Chemical and Systems Biology, Stanford University School of Medicine, 269 Campus Drive, CCSR 3155, Stanford, California 94305, USA
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46
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Rotaru A, Mokhir A. Nucleinsäurebinder, die durch Licht wählbarer Wellenlänge aktiviert werden können. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200700641] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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47
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Burns DC, Zhang F, Woolley GA. Synthesis of 3,3'-bis(sulfonato)-4,4'-bis(chloroacetamido)azobenzene and cysteine cross-linking for photo-control of protein conformation and activity. Nat Protoc 2007; 2:251-8. [PMID: 17406582 DOI: 10.1038/nprot.2007.21] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This protocol describes a procedure for the synthesis of 3,3'-bis(sulfonato)-4,4'-bis(chloroacetamido)azobenzene (BSBCA), a water-soluble, thiol-reactive, photo-switchable cross-linker. In addition, a protocol is outlined for installing the cross-linker in an intramolecular fashion onto proteins bearing two surface-exposed Cys residues. BSBCA is designed to be used as an in vitro activity switch that operates by exerting temporal and reversible photo-control over alpha-helix content within synthetic peptides and recombinant proteins. Synthesis of the cross-linker requires approximately 4.5 d, and cross-linking can be performed in 10-12 h.
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Affiliation(s)
- Darcy C Burns
- Worsfold Water Quality Centre, Trent University, 1600 West Bank Drive, Peterborough, ON, Canada K9J 7B8.
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48
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Abstract
Photochemical regulation of biological processes offers a high level of control to study intracellular mechanisms with unprecedented spatial and temporal resolution. This report summarizes the advances made in recent years, focusing predominantly on the in vivo regulation of gene function using irradiation with UV light. The majority of the described applications entail the utilization of photocaging groups installed either on a small molecule modulator of biomolecular function or directly on a biological macromolecule itself.
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Affiliation(s)
- Douglas D Young
- North Carolina State University, Department of Chemistry, Campus Box 8204, Raleigh, NC 27695, USA
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49
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Tang X, Dmochowski IJ. Regulating gene expression with light-activated oligonucleotides. MOLECULAR BIOSYSTEMS 2006; 3:100-10. [PMID: 17245489 DOI: 10.1039/b614349k] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Since the development of light-responsive amino acids, the activity of numerous biomolecules has been photomodulated in biochemical, biophysical, and cellular assays. Biological problems of even greater complexity motivate the development of quantitative methods for controlling gene activity with high spatial and temporal resolution, using light as an external trigger. Photoresponsive DNA and RNA oligonucleotides would optimally serve this purpose, but have proven difficult to expand from proofs-of-concept to in vivo experiments. Until recently, the development of this technology was limited by the synthesis of oligonucleotides whose function could be significantly modulated with near-UV light. New synthetic protocols and strategies for both up- and down-regulating gene activity finally make it possible to address biological considerations. In the near future, we can expect photoresponsive DNA and RNA molecules that are relatively non-toxic, nuclease-resistant, and maintain their specificity and activity in vivo. Quantitative, laser-initiated methods for controlling DNA and RNA function will illuminate new areas in cell and developmental biology.
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Affiliation(s)
- XinJing Tang
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA 19104-6323, USA
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