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Nour MAY, Drozd VS, Lemeshko EA, Tafran L, Salimova AA, Kulikova AV, Eldeeb AA. RNase H-dependent DNA thresholder modulated by cancer marker concentration. Chem Commun (Camb) 2024; 60:4427-4430. [PMID: 38563262 DOI: 10.1039/d4cc00495g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Threshold antisense oligonucleotide constructs were designed to cleave mRNA within different biomarker concentrations. The mRNA cleavage is activated by 2.6, 7.5 or 39.5 nM of biomarker depending on the construct design. The constructs can be used to differentiate cancer from normal cells by the level of oncogene expression followed by silencing of a targeted gene.
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Affiliation(s)
- Moustapha A Y Nour
- Laboratory of Nucleic Acid Nanotechnology, SCAMT Institute ITMO University, Saint-Petersburg, Russia, 9 Lomonosova Str., St. Petersburg, 191002, Russian Federation.
| | - Valeriia S Drozd
- Laboratory of Nucleic Acid Nanotechnology, SCAMT Institute ITMO University, Saint-Petersburg, Russia, 9 Lomonosova Str., St. Petersburg, 191002, Russian Federation.
| | - Evgenii A Lemeshko
- Laboratory of Nucleic Acid Nanotechnology, SCAMT Institute ITMO University, Saint-Petersburg, Russia, 9 Lomonosova Str., St. Petersburg, 191002, Russian Federation.
| | - Lilia Tafran
- Laboratory of Nucleic Acid Nanotechnology, SCAMT Institute ITMO University, Saint-Petersburg, Russia, 9 Lomonosova Str., St. Petersburg, 191002, Russian Federation.
| | - Adeliia A Salimova
- Laboratory of Nucleic Acid Nanotechnology, SCAMT Institute ITMO University, Saint-Petersburg, Russia, 9 Lomonosova Str., St. Petersburg, 191002, Russian Federation.
| | - Alexandra V Kulikova
- Laboratory of Nucleic Acid Nanotechnology, SCAMT Institute ITMO University, Saint-Petersburg, Russia, 9 Lomonosova Str., St. Petersburg, 191002, Russian Federation.
| | - Ahmed A Eldeeb
- Laboratory of Nucleic Acid Nanotechnology, SCAMT Institute ITMO University, Saint-Petersburg, Russia, 9 Lomonosova Str., St. Petersburg, 191002, Russian Federation.
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Nedorezova DD, Dubovichenko MV, Kalnin AJ, Nour MAY, Eldeeb AA, Ashmarova AI, Kurbanov GF, Kolpashchikov DM. Cleaving Folded RNA with DNAzyme Agents. Chembiochem 2024; 25:e202300637. [PMID: 37870555 DOI: 10.1002/cbic.202300637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/17/2023] [Accepted: 10/23/2023] [Indexed: 10/24/2023]
Abstract
Cleavage of biological mRNA by DNAzymes (Dz) has been proposed as a variation of oligonucleotide gene therapy (OGT). The design of Dz-based OGT agents includes computational prediction of two RNA-binding arms with low affinity (melting temperatures (Tm ) close to the reaction temperature of 37 °C) to avoid product inhibition and maintain high specificity. However, RNA cleavage might be limited by the RNA binding step especially if the RNA is folded in secondary structures. This calls for the need for two high-affinity RNA-binding arms. In this study, we optimized 10-23 Dz-based OGT agents for cleavage of three RNA targets with different folding energies under multiple turnover conditions in 2 mM Mg2+ at 37 °C. Unexpectedly, one optimized Dz had each RNA-binding arm with a Tm ≥60 °C, without suffering from product inhibition or low selectivity. This phenomenon was explained by the folding of the RNA cleavage products into stable secondary structures. This result suggests that Dz with long (high affinity) RNA-binding arms should not be excluded from the candidate pool for OGT agents. Rather, analysis of the cleavage products' folding should be included in Dz selection algorithms. The Dz optimization workflow should include testing with folded rather than linear RNA substrates.
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Affiliation(s)
- Daria D Nedorezova
- Laboratory of molecular robotics and biosensor systems, Laboratory of Frontier nucleic acid technologies in gene therapy of cancer, SCAMT Institute, ITMO University, St. Petersburg, 191002, Russian Federation
| | - Mikhail V Dubovichenko
- Laboratory of molecular robotics and biosensor systems, Laboratory of Frontier nucleic acid technologies in gene therapy of cancer, SCAMT Institute, ITMO University, St. Petersburg, 191002, Russian Federation
| | - Arseniy J Kalnin
- Laboratory of molecular robotics and biosensor systems, Laboratory of Frontier nucleic acid technologies in gene therapy of cancer, SCAMT Institute, ITMO University, St. Petersburg, 191002, Russian Federation
| | - Moustapha A Y Nour
- Laboratory of molecular robotics and biosensor systems, Laboratory of Frontier nucleic acid technologies in gene therapy of cancer, SCAMT Institute, ITMO University, St. Petersburg, 191002, Russian Federation
| | - Ahmed A Eldeeb
- Laboratory of molecular robotics and biosensor systems, Laboratory of Frontier nucleic acid technologies in gene therapy of cancer, SCAMT Institute, ITMO University, St. Petersburg, 191002, Russian Federation
| | - Anna I Ashmarova
- Laboratory of molecular robotics and biosensor systems, Laboratory of Frontier nucleic acid technologies in gene therapy of cancer, SCAMT Institute, ITMO University, St. Petersburg, 191002, Russian Federation
| | - Gabdulla F Kurbanov
- Laboratory of molecular robotics and biosensor systems, Laboratory of Frontier nucleic acid technologies in gene therapy of cancer, SCAMT Institute, ITMO University, St. Petersburg, 191002, Russian Federation
| | - Dmitry M Kolpashchikov
- Laboratory of molecular robotics and biosensor systems, Laboratory of Frontier nucleic acid technologies in gene therapy of cancer, SCAMT Institute, ITMO University, St. Petersburg, 191002, Russian Federation
- Chemistry Department, University of Central Florida, Orlando, FL 32816-2366, USA
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL 32816, USA
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Kaur G, Khanna B, Yusuf M, Sharma A, Khajuria A, Alajangi HK, Jaiswal PK, Sachdeva M, Barnwal RP, Singh G. A Path of Novelty from Nanoparticles to Nanobots: Theragnostic Approach for Targeting Cancer Therapy. Crit Rev Ther Drug Carrier Syst 2024; 41:1-38. [PMID: 38305340 DOI: 10.1615/critrevtherdrugcarriersyst.2023046674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Pharmaceutical development of cancer therapeutics is a dynamic area of research. Even after decades of intensive work, cancer continues to be a dreadful disease with an ever-increasing global incidence. The progress of nanotechnology in cancer research has overcome inherent limitations in conventional cancer chemotherapy and fulfilled the need for target-specific drug carriers. Nanotechnology uses the altered patho-physiological microenvironment of malignant cells and offers various advantages like improved solubility, reduced toxicity, prolonged drug circulation with controlled release, circumventing multidrug resistance, and enhanced biodistribution. Early cancer detection has a crucial role in selecting the best drug regime, thus, diagnosis and therapeutics go hand in hand. Furthermore, nanobots are an amazing possibility and promising innovation with numerous significant applications, particularly in fighting cancer and cleaning out blood vessels. Nanobots are tiny robots, ranging in size from 1 to 100 nm. Moreover, the nanobots would work similarly to white blood cells, watching the bloodstream and searching for indications of distress. This review articulates the evolution of various organic and inorganic nanoparticles and nanobots used as therapeutics, along with their pros and cons. It also highlights the shift in diagnostics from conventional methods to more advanced techniques. This rapidly growing domain is providing more space for engineering desired nanoparticles that can show miraculous results in therapeutic and diagnostic trials.
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Affiliation(s)
- Gursharanpreet Kaur
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, 160014, India
| | - Bhawna Khanna
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, 160014, India
| | - Mohammed Yusuf
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, 160014, India
| | - Akanksha Sharma
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, 160014, India; Department of Biophysics, Panjab University, Chandigarh, 160014, India
| | - Akhil Khajuria
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, 160014, India
| | - Hema K Alajangi
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, 160014, India; Department of Biophysics, Panjab University, Chandigarh, 160014, India
| | - Pradeep K Jaiswal
- Department of Biochemistry and Biophysics, Texas A & M University, College Station, TX 77843, USA
| | - Mandip Sachdeva
- College of Pharmacy and Pharmaceutical Science, Florida A & M University, Tallahassee, FL, USA
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Nedorezova DD, Rubel MS, Rubel AA. Multicomponent DNAzyme Nanomachines: Structure, Applications, and Prospects. BIOCHEMISTRY. BIOKHIMIIA 2024; 89:S249-S261. [PMID: 38621754 DOI: 10.1134/s0006297924140141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/04/2023] [Accepted: 10/06/2023] [Indexed: 04/17/2024]
Abstract
Nucleic acids (NAs) are important components of living organisms responsible for the storage and transmission of hereditary information. They form complex structures that can self-assemble and bind to various biological molecules. DNAzymes are NAs capable of performing simple chemical reactions, which makes them potentially useful elements for creating DNA nanomachines with required functions. This review focuses on multicomponent DNA-based nanomachines, in particular on DNAzymes as their main functional elements, as well as on the structure of DNAzyme nanomachines and their application in the diagnostics and treatment of diseases. The article also discusses the advantages and disadvantages of DNAzyme-based nanomachines and prospects for their future applications. The review provides information about new technologies and the possibilities of using NAs in medicine.
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Drozd VS, Eldeeb AA, Kolpashchikov DM, Nedorezova DD. Binary Antisense Oligonucleotide Agent for Cancer Marker-Dependent Degradation of Targeted RNA. Nucleic Acid Ther 2022; 32:412-420. [DOI: 10.1089/nat.2021.0108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Valeriia S. Drozd
- Laboratory of Molecular Robotics and Biosensor Materials, SCAMT Institute, ITMO University, St. Petersburg, Russian Federation
| | - Ahmed A. Eldeeb
- Laboratory of Molecular Robotics and Biosensor Materials, SCAMT Institute, ITMO University, St. Petersburg, Russian Federation
| | - Dmitry M. Kolpashchikov
- Laboratory of Molecular Robotics and Biosensor Materials, SCAMT Institute, ITMO University, St. Petersburg, Russian Federation
- Chemistry Department, University of Central Florida, Orlando, Florida, USA
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida, USA
| | - Daria D. Nedorezova
- Laboratory of Molecular Robotics and Biosensor Materials, SCAMT Institute, ITMO University, St. Petersburg, Russian Federation
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Yu Z, Guo J, Meng T, Ge L, Liu L, Wang H, Yang X. Bcl-xL DNAzymes promote radiosensitivity and chemosensitivity in colorectal cancer cells via enhancing apoptosis. BMC Pharmacol Toxicol 2022; 23:13. [PMID: 35123593 PMCID: PMC8817578 DOI: 10.1186/s40360-022-00553-x] [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] [Received: 08/26/2021] [Accepted: 01/27/2022] [Indexed: 11/10/2022] Open
Abstract
Background RNA-cleaving deoxyribozymes (DNAzymes) are catalytic deoxyribonucleic acid molecules that have become a promising new class of gene suppressors by binding and cleaving target mRNA. This study investigated whether DNAzymes targeting Bcl-xL enhanced the effectiveness of radiotherapy and chemotherapy in colorectal cancer (CRC) cells. Methods Two types of CRC cells, SW480 and SW837, were transfected with five DNAzymes. Cell viability, Bcl-xL expression and apoptosis were examined. SW480 xenograft model was used to examine the combined effects of Bcl-xL DNAzymes and 5-FU (or X-rays) on tumor growth. Results Three Bcl-xL DNAzymes, DT882, DT883, and DT884 were identified to be effective in suppressing Bcl-xL expression and causing cell apoptosis. Furthermore, DT882 combined with 5-FU or radiotherapy addictively promoted cell apoptosis and significantly inhibited the growth of SW480 xenografts in vivo. Conclusions These results suggest that Bcl-xL DNAzymes can enhance the radiosensitivity and chemosensitivity in CRC cells via inducing apoptosis. Supplementary Information The online version contains supplementary material available at 10.1186/s40360-022-00553-x.
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Multifaceted roles of long non-coding RNAs in triple-negative breast cancer: biology and clinical applications. Biochem Soc Trans 2021; 48:2791-2810. [PMID: 33258920 DOI: 10.1042/bst20200666] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 11/02/2020] [Accepted: 11/04/2020] [Indexed: 02/06/2023]
Abstract
Triple-negative breast cancer (TNBC) is a heterogeneous breast cancer subtype that lacks targeted therapy due to the absence of estrogen, progesterone, and HER2 receptors. Moreover, TNBC was shown to have a poor prognosis, since it involves aggressive phenotypes that confer significant hindrance to therapeutic treatments. Recent state-of-the-art sequencing technologies have shed light on several long non-coding RNAs (lncRNAs), previously thought to have no biological function and were considered as genomic junk. LncRNAs are involved in various physiological as well as pathological conditions, and play a key role in drug resistance, gene expression, and epigenetic regulation. This review mainly focuses on exploring the multifunctional roles of candidate lncRNAs, and their strong association with TNBC development. We also summarise various emerging research findings that establish novel paradigms of lncRNAs function as oncogenes and/or tumor suppressors in TNBC development, suggesting their role as prospective therapeutic targets.
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Fang C, Ouyang P, Yang Y, Qing Y, Han J, Shang W, Chen Y, Du J. MiRNA Detection Using a Rolling Circle Amplification and RNA-Cutting Allosteric Deoxyribozyme Dual Signal Amplification Strategy. BIOSENSORS-BASEL 2021; 11:bios11070222. [PMID: 34356693 PMCID: PMC8301874 DOI: 10.3390/bios11070222] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/30/2021] [Accepted: 07/02/2021] [Indexed: 12/23/2022]
Abstract
A microRNA (miRNA) detection platform composed of a rolling circle amplification (RCA) system and an allosteric deoxyribozyme system is proposed, which can detect miRNA-21 rapidly and efficiently. Padlock probe hybridization with the target miRNA is achieved through complementary base pairing and the padlock probe forms a closed circular template under the action of ligase; this circular template results in RCA. In the presence of DNA polymerase, RCA proceeds and a long chain with numerous repeating units is formed. In the presence of single-stranded DNA (H1 and H2), multi-component nucleic acid enzymes (MNAzymes) are formed that have the ability to cleave substrates. Finally, substrates containing fluorescent and quenching groups and magnesium ions are added to the system to activate the MNAzyme and the substrate cleavage reaction, thus achieving fluorescence intensity amplification. The RCA-MNAzyme system has dual signal amplification and presents a sensing platform that demonstrates broad prospects in the analysis and detection of nucleic acids.
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Gomes de Oliveira AG, Dubovichenko MV, ElDeeb AA, Wanjohi J, Zablotskaya S, Kolpashchikov DM. RNA-Cleaving DNA Thresholder Controlled by Concentrations of miRNA Cancer Marker. Chembiochem 2021; 22:1750-1754. [PMID: 33433948 DOI: 10.1002/cbic.202000769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/30/2020] [Indexed: 11/10/2022]
Abstract
Oligonucleotide gene therapy (OGT) agents suppress specific mRNAs in cells and thus reduce the expression of targeted genes. The ability to unambiguously distinguish cancer from healthy cells can solve the low selectivity problem of OGT agents. Cancer RNA markers are expressed in both healthy and cancer cells with a higher expression level in cancer cells. We have designed a DNA-based construct, named DNA thresholder (DTh) that cleaves targeted RNA only at high concentrations of cancer marker RNA and demonstrates low cleavage activity at low marker concentrations. The RNA-cleaving activity can be adjusted within one order of magnitude of the cancer marker RNA concentration by simply redesigning DTh. Importantly, DTh recognizes cancer marker RNA, while cleaving targeted RNA; this offers a possibility to suppress vital genes exclusively in cancer cells, thus triggering their death. DTh is a prototype of computation-inspired molecular device for controlling gene expression and cancer treatment.
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Affiliation(s)
- Andrey Giovanni Gomes de Oliveira
- SCAMT institute, Laboratory of Molecular Robotics and Biosensor Materials, ITMO University, 9 Lomonosova Str., 191002, St. Petersburg, Russian Federation
| | - Mikhail V Dubovichenko
- SCAMT institute, Laboratory of Molecular Robotics and Biosensor Materials, ITMO University, 9 Lomonosova Str., 191002, St. Petersburg, Russian Federation
| | - Ahmed A ElDeeb
- SCAMT institute, Laboratory of Molecular Robotics and Biosensor Materials, ITMO University, 9 Lomonosova Str., 191002, St. Petersburg, Russian Federation
| | - Joseph Wanjohi
- SCAMT institute, Laboratory of Molecular Robotics and Biosensor Materials, ITMO University, 9 Lomonosova Str., 191002, St. Petersburg, Russian Federation
| | - Sofia Zablotskaya
- SCAMT institute, Laboratory of Molecular Robotics and Biosensor Materials, ITMO University, 9 Lomonosova Str., 191002, St. Petersburg, Russian Federation
| | - Dmitry M Kolpashchikov
- SCAMT institute, Laboratory of Molecular Robotics and Biosensor Materials, ITMO University, 9 Lomonosova Str., 191002, St. Petersburg, Russian Federation.,Chemistry Department, University of Central Florida, 32816-2366, Orlando, FL, USA.,Burnett School of Biomedical Sciences, University of Central Florida, 32816, Orlando, FL, USA
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Mollarasouli F, Badilli U, Bakirhan NK, Ozkan SA, Ozkan Y. Advanced DNA nanomachines: Strategies and bioapplications. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2020.102290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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11
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Molden TA, Niccum CT, Kolpashchikov DM. Cut and Paste for Cancer Treatment: A DNA Nanodevice that Cuts Out an RNA Marker Sequence to Activate a Therapeutic Function. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tatiana A. Molden
- Chemistry Department University of Central Florida Orlando FL 32816 USA
| | - Caitlyn T. Niccum
- Chemistry Department University of Central Florida Orlando FL 32816 USA
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Moon WJ, Yang Y, Liu J. Zn 2+ -Dependent DNAzymes: From Solution Chemistry to Analytical, Materials and Therapeutic Applications. Chembiochem 2020; 22:779-789. [PMID: 33007113 DOI: 10.1002/cbic.202000586] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 10/01/2020] [Indexed: 12/20/2022]
Abstract
Since 1994, deoxyribozymes or DNAzymes have been in vitro selected to catalyze various types of reactions. Metal ions play a critical role in DNAzyme catalysis, and Zn2+ is a very important one among them. Zn2+ has good biocompatibility and can be used for intracellular applications. Chemically, Zn2+ is a Lewis acid and it can bind to both the phosphate backbone and the nucleobases of DNA. Zn2+ undergoes hydrolysis even at neutral pH, and the partially hydrolyzed polynuclear complexes can affect the interactions with DNA. These features have made Zn2+ a unique cofactor for DNAzyme reactions. This review summarizes Zn2+ -dependent DNAzymes with an emphasis on RNA-/DNA-cleaving reactions. A key feature is the sharp Zn2+ concentration and pH-dependent activity for many of the DNAzymes. The applications of these DNAzymes as biosensors for Zn2+ , as therapeutic agents to cleave intracellular RNA, and as chemical biology tools to manipulate DNA are discussed. Future studies can focus on the selection of new DNAzymes with improved performance and detailed biochemical characterizations to understand the role of Zn2+ , which can facilitate practical applications of Zn2+ -dependent DNAzymes.
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Affiliation(s)
- Woohyun J Moon
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Yongjie Yang
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.,Department of Food and Biological Science, College of Agricultural, Yanbian University, Yanbian Chaoxianzuzizhizhou, Yanji, 133002, P. R. China
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.,Centre for Eye and Vision Research, 17W Hong Kong Science Park, Hong Kong, China
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Molden TA, Niccum CT, Kolpashchikov DM. Cut and Paste for Cancer Treatment: A DNA Nanodevice that Cuts Out an RNA Marker Sequence to Activate a Therapeutic Function. Angew Chem Int Ed Engl 2020; 59:21190-21194. [DOI: 10.1002/anie.202006384] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/21/2020] [Indexed: 12/31/2022]
Affiliation(s)
- Tatiana A. Molden
- Chemistry Department University of Central Florida Orlando FL 32816 USA
| | - Caitlyn T. Niccum
- Chemistry Department University of Central Florida Orlando FL 32816 USA
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Li X, Yang F, Zhou W, Yuan R, Xiang Y. Targeted and direct intracellular delivery of native DNAzymes enables highly specific gene silencing. Chem Sci 2020; 11:8966-8972. [PMID: 34123151 PMCID: PMC8163450 DOI: 10.1039/d0sc03974h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 08/05/2020] [Indexed: 12/14/2022] Open
Abstract
DNAzymes exhibit high potential as gene silencing agents for therapeutic applications. Such purposes, however, are significantly challenged by the targeted and successful delivery of unmodified DNAzymes into cells with minimal side effects. Here, we set out to formulate and demonstrate a new stimuli-responsive and constrained aptamer/DNAzyme (Apt/Dz) catenane nanostructure for highly specific gene silencing. The rational design of the Apt/Dz catenane nanostructure with the respective integration of the aptamer sequence and the completely closed catenane format enables both the targeted capability and significantly improved nuclease resistance, facilitating the stable and targeted delivery of unmodified Dz into cancer cells. Moreover, the Dz enzymatic activity in the constrained structure can only be conditionally regulated by the specific intracellular mRNA sequences to silence the target gene with highly reduced side effects. Results show that the Apt/Dz catenane nanostructure can effectively inhibit the expression of the target gene and the proliferation of cancer cells with high specificity.
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Affiliation(s)
- Xia Li
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 P. R. China
| | - Fang Yang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 P. R. China
| | - Wenjiao Zhou
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 P. R. China
| | - Ruo Yuan
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 P. R. China
| | - Yun Xiang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 P. R. China
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