1
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Sharma A, Vaswani P, Bhatia D. Revolutionizing cancer therapy using tetrahedral DNA nanostructures as intelligent drug delivery systems. NANOSCALE ADVANCES 2024; 6:3714-3732. [PMID: 39050960 PMCID: PMC11265600 DOI: 10.1039/d4na00145a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 05/24/2024] [Indexed: 07/27/2024]
Abstract
DNA nanostructures have surfaced as intriguing entities with vast potential in biomedicine, notably in the drug delivery area. Tetrahedral DNA nanostructures (TDNs) have received worldwide attention from among an array of different DNA nanostructures due to their extraordinary stability, great biocompatibility, and ease of functionalization. TDNs could be readily synthesized, making them attractive carriers for chemotherapeutic medicines, nucleic acid therapeutics, and imaging probes. Their varied uses encompass medication delivery, molecular diagnostics, biological imaging, and theranostics. This review extensively highlights the mechanisms of functional modification of TDNs and their applications in cancer therapy. Additionally, it discusses critical concerns and unanswered problems that require attention to increase the future application of TDNs in developing cancer treatment.
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Affiliation(s)
- Ayushi Sharma
- Department of Biotechnology, Institute of Applied Sciences and Humanities, GLA University Mathura Uttar Pradesh-281406 India
| | - Payal Vaswani
- Department of Biological Sciences and Engineering, Indian Institute of Technology Gandhinagar Palaj 382355 Gandhinagar India
| | - Dhiraj Bhatia
- Department of Biological Sciences and Engineering, Indian Institute of Technology Gandhinagar Palaj 382355 Gandhinagar India
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2
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Darwish GH, Massey M, Daudet G, Alde LG, Algar WR. Tetrameric Antibody Complexes and Affinity Tag Peptides for the Selective Immobilization and Imaging of Single Quantum Dots. Bioconjug Chem 2023. [PMID: 37243625 DOI: 10.1021/acs.bioconjchem.3c00142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Colloidal semiconductor quantum dots (QDs) are of widespread interest as fluorescent labels for bioanalysis and imaging applications. Single-particle measurements have proven to be a very powerful tool for better understanding the fundamental properties and behaviors of QDs and their bioconjugates; however, a recurring challenge is the immobilization of QDs in a solution-like environment that minimizes interactions with a bulk surface. Immobilization strategies for QD-peptide conjugates are particularly underdeveloped within this context. Here, we present a novel strategy for the selective immobilization of single QD-peptide conjugates using a combination of tetrameric antibody complexes (TACs) and affinity tag peptides. A glass substrate is modified with an adsorbed layer of concanavalin A (ConA) that binds a subsequent layer of dextran that minimizes nonspecific binding. A TAC with anti-dextran and anti-affinity tag antibodies binds to the dextran-coated glass surface and to the affinity tag sequence of QD-peptide conjugates. The result is spontaneous and sequence-selective immobilization of single QDs without any chemical activation or cross-linking. Controlled immobilization of multiple colors of QDs is possible using multiple affinity tag sequences. Experiments confirmed that this approach positions the QD away from the bulk surface. The method supports real-time imaging of binding and dissociation, measurements of Förster resonance energy transfer (FRET), tracking of dye photobleaching, and detection of proteolytic activity. We anticipate that this immobilization strategy will be useful for studies of QD-associated photophysics, biomolecular interactions and processes, and digital assays.
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Affiliation(s)
- Ghinwa H Darwish
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Melissa Massey
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Gabrielle Daudet
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Luis G Alde
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - W Russ Algar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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3
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Chen X, Liu Y, Liu X, Lu C. Nanoparticle-based single molecule fluorescent probes. LUMINESCENCE 2022; 37:1808-1821. [PMID: 35982510 DOI: 10.1002/bio.4364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/13/2022] [Accepted: 08/16/2022] [Indexed: 11/11/2022]
Abstract
Single molecule fluorescent probes have attracted considerable attention duet to their ultimate sensitivity, fast response, low sample consumption, and high signal-to-noise ratio. Nanoparticles with outstanding optical properties make them perfect candidates for probes in application of single molecule detection. In this review, we focus on various kinds of nanoparticles acting as single molecule fluorescent probes, including quantum dots, upconverting fluorescent nanoparticles, carbon dots, single-wall carbon nanotubes, fluorescent nanodiamonds, polymeric nanoparticles, nanoclusters, and metallic nanoparticles. Optical properties of various nanoparticles and their recent application in single molecule fluorescent probes are explored. How nanoparticles boost the sensitivity of detection is emphasized in combination with different sensing strategies. Future trends of nanoparticles in single molecule detection are also discussed. We hope this review can provide practical guidance for researchers who work on nanoparticle-based single molecule fluorescent probes.
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Affiliation(s)
- Xueqian Chen
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Yuhao Liu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Xiaoting Liu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Chao Lu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, China.,State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China
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4
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Yan J, Zhan X, Zhang Z, Chen K, Wang M, Sun Y, He B, Liang Y. Tetrahedral DNA nanostructures for effective treatment of cancer: advances and prospects. J Nanobiotechnology 2021; 19:412. [PMID: 34876145 PMCID: PMC8650297 DOI: 10.1186/s12951-021-01164-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 11/24/2021] [Indexed: 11/10/2022] Open
Abstract
Recently, DNA nanostructures with vast application potential in the field of biomedicine, especially in drug delivery. Among these, tetrahedral DNA nanostructures (TDN) have attracted interest worldwide due to their high stability, excellent biocompatibility, and simplicity of modification. TDN could be synthesized easily and reproducibly to serve as carriers for, chemotherapeutic drugs, nucleic acid drugs and imaging probes. Therefore, their applications include, but are not restricted to, drug delivery, molecular diagnostics, and biological imaging. In this review, we summarize the methods of functional modification and application of TDN in cancer treatment. Also, we discuss the pressing questions that should be targeted to increase the applicability of TDN in the future.
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Affiliation(s)
- Jianqin Yan
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, 266021, China
| | - Xiaohui Zhan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China
- School of Biomedical Engineering, Sichuan University, Chengdu, 610064, China
| | - Zhuangzhuang Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China
- School of Biomedical Engineering, Sichuan University, Chengdu, 610064, China
| | - Keqi Chen
- Department of Clinical Laboratory, Qingdao Special Servicemen Recuperation Centre of PLA Navy, Qingdao, 266021, China
| | - Maolong Wang
- Department of Thoracic Surgery, Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Yong Sun
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, 266021, China.
| | - Bin He
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China
- School of Biomedical Engineering, Sichuan University, Chengdu, 610064, China
| | - Yan Liang
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, 266021, China.
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5
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Jiang J, Xia J, Zang Y, Diao G. Electrochemistry/Photoelectrochemistry-Based Immunosensing and Aptasensing of Carcinoembryonic Antigen. SENSORS (BASEL, SWITZERLAND) 2021; 21:7742. [PMID: 34833818 PMCID: PMC8624776 DOI: 10.3390/s21227742] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/14/2021] [Accepted: 11/17/2021] [Indexed: 11/19/2022]
Abstract
Recently, electrochemistry- and photoelectrochemistry-based biosensors have been regarded as powerful tools for trace monitoring of carcinoembryonic antigen (CEA) due to the fact of their intrinsic advantages (e.g., high sensitivity, excellent selectivity, small background, and low cost), which play an important role in early cancer screening and diagnosis and benefit people's increasing demands for medical and health services. Thus, this mini-review will introduce the current trends in electrochemical and photoelectrochemical biosensors for CEA assay and classify them into two main categories according to the interactions between target and biorecognition elements: immunosensors and aptasensors. Some recent illustrative examples are summarized for interested readers, accompanied by simple descriptions of the related signaling strategies, advanced materials, and detection modes. Finally, the development prospects and challenges of future electrochemical and photoelectrochemical biosensors are considered.
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Affiliation(s)
| | | | - Yang Zang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China; (J.J.); (J.X.); (G.D.)
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6
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Liu M, Qiu JG, Ma F, Zhang CY. Advances in single-molecule fluorescent nanosensors. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2021; 13:e1716. [PMID: 33779063 DOI: 10.1002/wnan.1716] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 12/21/2022]
Abstract
Single-molecule detection represents the ultimate sensitivity in measurement science with the characteristics of simplicity, rapidity, low sample consumption, and high signal-to-noise ratio and has attracted considerable attentions in biosensor development. In recent years, a variety of functional nanomaterials with unique chemical, optical, mechanical, and electronic features have been synthesized. The integration of single-molecule detection with functional nanomaterials enables the construction of novel single-molecule fluorescent nanosensors with excellent performance. Herein, we review the advance in single-molecule fluorescent nanosensors constructed by novel nanomaterials including quantum dots, gold nanoparticles, upconversion nanoparticles, fluorescent conjugated polymer nanoparticles, nanosheets, and magnetic nanoparticles in the past decade (2011-2020), and discuss the strategies, features, and applications of single-molecule fluorescent nanosensors in the detection of microRNAs, DNAs, enzymes, proteins, viruses, and live cells. Moreover, we highlight the future direction and challenges in this area. This article is categorized under: Diagnostic Tools > Biosensing Diagnostic Tools > In Vitro Nanoparticle-Based Sensing Diagnostic Tools > Diagnostic Nanodevices.
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Affiliation(s)
- Meng Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, China
| | - Jian-Ge Qiu
- Academy of Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - Fei Ma
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, China
| | - Chun-Yang Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, China
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7
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Li H, Han M, Weng X, Zhang Y, Li J. DNA-Tetrahedral-Nanostructure-Based Entropy-Driven Amplifier for High-Performance Photoelectrochemical Biosensing. ACS NANO 2021; 15:1710-1717. [PMID: 33439617 DOI: 10.1021/acsnano.0c09374] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In virtue of the inherent molecular recognition and programmability, DNA has recently become the most promising for high-performance biosensors. The rationally engineered nucleic acid architecture will be very advantageous to hybridization efficiency, specificity, and sensitivity. Herein, a robust and split-mode photoelectrochemical (PEC) biosensor for miRNA-196a was developed based on an entropy-driven tetrahedral DNA (EDTD) amplifier coupled with superparamagnetic nanostructures. The DNA tetrahedron structure features in rigidity and structural stability that contribute to obtain precise identification units and specific orientations, improving the hybridization efficiency, sensitivity, and selectivity of the as-designed PEC biosensor. Further, superparamagnetic Fe3O4@SiO2@CdS particles integrated with DNA nanostructures are beneficial for the construction of a split-mode, highly selective, and reliable PEC biosensor. Particularly, the enzyme- and hairpin-free EDTD amplifier eliminates unnecessary interference from the complex secondary structure of pseudoknots or kissing loops in typical hairpin DNAs, significantly lowers the background noise, and improves the detection sensitivity. This PEC biosensor is capable of monitoring miRNA-196a in practical settings with additional advantages of efficient electrode fabrication, stability, and reproducibility. This strategy can be extended to various miRNA assays in complex biological systems with excellent performance.
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Affiliation(s)
- Hongbo Li
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Min Han
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Xuan Weng
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Yuye Zhang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Jing Li
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
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8
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Wan Y, Wang H, Ji J, Kang K, Yang M, Huang Y, Su Y, Ma K, Zhu L, Deng S. Zippering DNA Tetrahedral Hyperlink for Ultrasensitive Electrochemical MicroRNA Detection. Anal Chem 2020; 92:15137-15144. [PMID: 33119272 DOI: 10.1021/acs.analchem.0c03553] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pluripotency of a DNA tetrahedron (DNATT) has made the iconic framework a compelling keystone in biosensors and biodevices. Herein, distinct from the well-tapped applications in substrate fabrication, we focus on exploring their tracing and signaling potentials. A homologous family of four isostructural DNATT, i.e., DNATTα/β/γ/δ, was engineered to form a sensor circuitry, in which a target-specific monolayer of thiolated DNATTγ pinned down the analyte jointly with the reciprocal DNATTδ into a sandwich complex; the latter further rallied an in situ interdigital relay of biotinylated DNATTα/β into a microsized hyperlink dubbed polyDNATT. Its scale and growth factors were illuminated rudimentarily in transmission electron microscopy and confocal laser scanning microscopy. Using a nonsmall-cell lung cancer-related microRNA (hsa-miR-193a-3p) as the subject, a compound DNA-backboned construct was synthesized, fusing all building blocks together. Its superb tacticity and stereochemical conformality avail the templating of a horseradish peroxidase train, which boosted the paralleled catalytic surge of proton donors, resulting in an attomolar detection limit and a broad calibration range of more than seven orders of magnitude. Such oligomerization bested the conventional hybridization chain reaction laddering at both biomechanical stability and stoichiometric congruency. More significantly, it demonstrates the flexibility of DNA architectures and their multitasking ability in biosensing.
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9
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Progress in DNA Tetrahedral Nanomaterials and Their Functionalization Research. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61198-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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10
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Sun D, Lin X, Lu J, Wei P, Luo Z, Lu X, Chen Z, Zhang L. DNA nanotetrahedron-assisted electrochemical aptasensor for cardiac troponin I detection based on the co-catalysis of hybrid nanozyme, natural enzyme and artificial DNAzyme. Biosens Bioelectron 2019; 142:111578. [PMID: 31422223 DOI: 10.1016/j.bios.2019.111578] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 08/03/2019] [Accepted: 08/07/2019] [Indexed: 12/20/2022]
Abstract
The sensitive and accurate detection of cardiac troponin I (cTnI) is critical for myocardial infarction diagnosis. In this work, a dual-aptamer-based electrochemical (EC) biosensor was designed for cTnI detection based on the DNA nanotetrahedron (NTH) capture probes and multifunctional hybrid nanoprobes. First, the NTH-based Tro4 aptamer probes were anchored on a screen printed gold electrode (SPGE) surface through the Au-S bond, providing an enhanced spatial dimension and accessibility for capturing cTnI. Then, the hybrid nanoprobes were fabricated by using magnetic Fe3O4 nanoparticles as nanocarriers to load a large amount of cTnI-specific Tro6 aptamer, natural horseradish peroxidase (HRP), HRP-mimicking Au@Pt nanozymes and G-quadruplex/hemin DNAzyme. This signaling nanoprobes are capable of specifically recognizing the target cTnI based on the Tro6 aptamer and amplifying the signals to improve the detection sensitivity via enzymatic processes. We found the remarkable enhanced effect of EC signal to be attributed to the co-catalysis effect of hybrid nanozymes, HRP and DNAzyme. The target cTnI was sandwiched between the two types of aptamers (Tro4 and Tro6) on the electrode interface. Finally, this EC aptasensing platform exhibited great analytical performance with a wide dynamic range of 0.01-100 ng mL-1 and a low detection limit of 7.5 pg mL-1 for cTnI. The high selectivity, sensitivity and reliability of EC aptasensor can provide great potential in the clinic disease diagnostics.
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Affiliation(s)
- Duanping Sun
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of New Drug Discovery and Evaluation of Ordinary Universities of Guangdong Province, Guangdong Pharmaceutical University, Guangzhou, 510006, China; School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China.
| | - Xiangan Lin
- Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - Jing Lu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China.
| | - Ping Wei
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of New Drug Discovery and Evaluation of Ordinary Universities of Guangdong Province, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Zibin Luo
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Xiange Lu
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of New Drug Discovery and Evaluation of Ordinary Universities of Guangdong Province, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Zuanguang Chen
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Luyong Zhang
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of New Drug Discovery and Evaluation of Ordinary Universities of Guangdong Province, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
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11
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Lu X, Liu J, Wu X, Ding B. Multifunctional DNA Origami Nanoplatforms for Drug Delivery. Chem Asian J 2019; 14:2193-2202. [PMID: 31125182 DOI: 10.1002/asia.201900574] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Indexed: 12/11/2022]
Abstract
DNA nanotechnology has been employed in the construction of self-assembled nano-biomaterials with uniform size and shape for various biological applications, such as bioimaging, diagnosis, or therapeutics. Herein, recent successful efforts to utilize multifunctional DNA origami nanoplatforms as drug-delivery vehicles are reviewed. Diagnostic and therapeutic strategies based on gold nanorods, chemotherapeutic drugs, cytosine-phosphate-guanine, functional proteins, gene drugs, and their combinations for optoacoustic imaging, photothermal therapy, chemotherapy, immunological therapy, gene therapy, and coagulation-based therapy are summarized. The challenges and opportunities for DNA-based nanocarriers for biological applications are also discussed.
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Affiliation(s)
- Xuehe Lu
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China.,CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing, 100190, P.R. China
| | - Jianbing Liu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing, 100190, P.R. China
| | - Xiaohui Wu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Baoquan Ding
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China.,CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, 11 BeiYiTiao, ZhongGuanCun, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
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12
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Su Y, Li D, Liu B, Xiao M, Wang F, Li L, Zhang X, Pei H. Rational Design of Framework Nucleic Acids for Bioanalytical Applications. Chempluschem 2019; 84:512-523. [DOI: 10.1002/cplu.201900118] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/08/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Yuwei Su
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal University 500 Dongchuan Road Shanghai 200241 P.R. China
| | - Dan Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal University 500 Dongchuan Road Shanghai 200241 P.R. China
| | - Bingyi Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal University 500 Dongchuan Road Shanghai 200241 P.R. China
| | - Mingshu Xiao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal University 500 Dongchuan Road Shanghai 200241 P.R. China
| | - Fei Wang
- Joint Research Center for Precision MedicineShanghai Jiao Tong University & Affiliated Sixth People's Hospital South Campus 6600th Nanfeng Road, Fengxian District Shanghai 201499 P. R. China
| | - Li Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal University 500 Dongchuan Road Shanghai 200241 P.R. China
| | - Xueli Zhang
- Joint Research Center for Precision MedicineShanghai Jiao Tong University & Affiliated Sixth People's Hospital South Campus 6600th Nanfeng Road, Fengxian District Shanghai 201499 P. R. China
- Southern Medical University Affiliated Fengxian Hospital Shanghai 201499 P. R. China
| | - Hao Pei
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal University 500 Dongchuan Road Shanghai 200241 P.R. China
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13
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Zhao X, Ma R, Hu Y, Chen X, Dou R, Liu K, Cui C, Liu H, Li Q, Pan D, Shan X, Wang L, Fan C, Lu X. Translocation of tetrahedral DNA nanostructures through a solid-state nanopore. NANOSCALE 2019; 11:6263-6269. [PMID: 30882811 DOI: 10.1039/c8nr10474c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Tetrahedral DNA nanostructures (TDNs) are programmable DNA nanostructures that have great potential in bio-sensing, cell imaging and therapeutic applications. In this study, we investigate the translocation behavior of individual TDNs through solid-state nanopores. Pronounced translocation signals for TDNs are observed that are sensitive to the size of the nanostructures. TDNs bound to linear DNA molecules produce an extra signal in the ionic current traces. Statistical analysis of its relative temporal position reveals distinct features between TDNs bound to the end and those bound to the middle of the linear DNA molecules. A featured current trace for two TDNs bound to the same linear DNA molecule has also been observed. Our study demonstrates the potential of using TDNs as sensitive bio-sensors to detect specific segments of a single DNA molecule in real time, based on solid-state nanopore devices.
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Affiliation(s)
- Xinjia Zhao
- Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
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14
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Abstract
Nucleic acids have been actively exploited to develop various exquisite nanostructures due to their unparalleled programmability. Especially, framework nucleic acids (FNAs) with tailorable functionality and precise addressability hold great promise for biomedical applications. In this review, we summarize recent progress of FNA-enabled biosensing in homogeneous solutions, on heterogeneous surfaces, and inside cells. We describe the strategies to translate the structural order and rigidity of FNAs to interfacial engineering with high controllability, and approaches to realize multiplexing for highly parallel in vitro detection. We also envision the marriage of the currently available FNA tool sets with other emerging technologies to develop a new generation of biosensors for precision diagnosis and bioimaging.
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Affiliation(s)
- Fan Yang
- School of Laboratory Medicine, Hubei University of Chinese Medicine, 1 Huangjia Lake West Road, Wuhan 430065, China
- Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Qian Li
- Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Lihua Wang
- Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Guo-Jun Zhang
- School of Laboratory Medicine, Hubei University of Chinese Medicine, 1 Huangjia Lake West Road, Wuhan 430065, China
| | - Chunhai Fan
- Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
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15
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Dai B, Hu Y, Duan J, Yang XD. Aptamer-guided DNA tetrahedron as a novel targeted drug delivery system for MUC1-expressing breast cancer cells in vitro. Oncotarget 2018; 7:38257-38269. [PMID: 27203221 PMCID: PMC5122387 DOI: 10.18632/oncotarget.9431] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 05/01/2016] [Indexed: 02/07/2023] Open
Abstract
Mucin 1 (MUC1) is an important molecular target for cancer treatment because it is overexpressed in most adenocarcinomas. In this study, a new MUC1-targeted drug delivery system was assembled using an aptamer (Apt) that could recognize MUC1 and a DNA tetrahedron (Td) that could carry doxorubicin (Dox) within its DNA structure. The complex thus formed (Apt-Td) had an average size of 12.38 nm and was negatively charged. Similar to the MUC1 aptamer, the Apt-Td could preferentially bind with MUC1-positive MCF-7 breast cancer cells. A drug loading experiment revealed that each Apt-Td complex could carry approximately 25 Dox molecules. Moreover, Apt-Td selectively delivered Dox into the MUC1-positive breast cancer cells but reduced Dox uptake by the MUC1-negative control cells. Dox-loaded Apt-Td also induced a significantly higher cytotoxicity to the MUC1-positive cancer cells versus the MUC1-negative control cells in vitro (p<0.01). These results suggest that Apt-Td may potentially serve as a drug carrier in the targeted treatment of MUC1-expressing breast cancers.
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Affiliation(s)
- Bindong Dai
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yan Hu
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - JinHong Duan
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xian-Da Yang
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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16
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Wang L, Meng Z, Martina F, Shao H, Shao F. Fabrication of circular assemblies with DNA tetrahedrons: from static structures to a dynamic rotary motor. Nucleic Acids Res 2017; 45:12090-12099. [PMID: 29126166 PMCID: PMC5716610 DOI: 10.1093/nar/gkx1045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/16/2017] [Accepted: 10/18/2017] [Indexed: 01/07/2023] Open
Abstract
DNA tetrahedron as the simplest 3D DNA nanostructure has been applied widely in biomedicine and biosensing. Herein, we design and fabricate a series of circular assemblies of DNA tetrahedron with high purity and decent yields. These circular nanostructures are confirmed by endonuclease digestion, gel electrophoresis and atomic force microscopy. Inspired by rotary protein motor, we demonstrate these circular architectures can serve as a stator for a rotary DNA motor to achieve the circular rotation. The DNA motor can rotate on the stators for several cycles, and the locomotion of the motor is monitored by the real-time fluorescent measurements.
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Affiliation(s)
- Liying Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
| | - Zhenyu Meng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
| | - Felicia Martina
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
| | - Huilin Shao
- Biomedical Institute of Global Heath Research and Technology, Departments of Biomedical Engineering and Surgery, National University of Singapore, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
| | - Fangwei Shao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
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17
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Feng QM, Guo YH, Xu JJ, Chen HY. Self-Assembled DNA Tetrahedral Scaffolds for the Construction of Electrochemiluminescence Biosensor with Programmable DNA Cyclic Amplification. ACS APPLIED MATERIALS & INTERFACES 2017; 9:17637-17644. [PMID: 28471159 DOI: 10.1021/acsami.7b04553] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A novel DNA tetrahedron-structured electrochemiluminescence (ECL) platform for bioanalysis with programmable DNA cyclic amplification was developed. In this work, glucose oxidase (GOD) was labeled to a DNA sequence (S) as functional conjugation (GOD-S), which could hybridize with other DNA sequences (L and P) to form GOD-S:L:P probe. In the presence of target DNA and a help DNA (A), the programmable DNA cyclic amplification was activated and released GOD-S via toehold-mediated strand displacement. Then, the obtained GOD-S was further immobilized on the DNA tetrahedral scaffolds with a pendant capture DNA and Ru(bpy)32+-conjugated silica nanoparticles (RuSi NPs) decorated on the electrode surface. Thus, the amount of GOD-S assembled on the electrode surface depended on the concentration of target DNA and GOD could catalyze glucose to generate H2O2 in situ. The ECL signal of Ru(bpy)32+-TPrA system was quenched by the presence of H2O2. By integrating the programmable DNA cyclic amplification and in situ generating H2O2 as Ru(bpy)32+ ECL quencher, a sensitive DNA tetrahedron-structured ECL sensing platform was proposed for DNA detection. Under optimized conditions, this biosensor showed a wide linear range from 100 aM to 10 pM with a detection limit of 40 aM, indicating a promising application in DNA analysis. Furthermore, by labeling GOD to different recognition elements, the proposed strategy could be used for the detection of various targets. Thus, this programmable cascade amplification strategy not only retains the high selectivity and good capturing efficiency of tetrahedral-decorated electrode surface but also provides potential applications in the construction of ECL biosensor.
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Affiliation(s)
- Qiu-Mei Feng
- School of Chemistry and Chemical Engineering, Jiangsu Normal University , Xuzhou 221116, P. R. China
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023, P. R. China
| | - Yue-Hua Guo
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023, P. R. China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023, P. R. China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023, P. R. China
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18
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Zhu L, Li G, Sun S, Tan H, He Y. Digital immunoassay of a prostate-specific antigen using gold nanorods and magnetic nanoparticles. RSC Adv 2017. [DOI: 10.1039/c7ra00575j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We have demonstrated a highly sensitive digital immunoassay for PSA detection.
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Affiliation(s)
- Liang Zhu
- Institute of Optical Imaging and Sensing
- Shenzhen Key Laboratory for Minimal Invasive Medical Technologies
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 518055
| | - Guohua Li
- Institute of Optical Imaging and Sensing
- Shenzhen Key Laboratory for Minimal Invasive Medical Technologies
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 518055
| | - Shuqing Sun
- Institute of Optical Imaging and Sensing
- Shenzhen Key Laboratory for Minimal Invasive Medical Technologies
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 518055
| | - Hui Tan
- The First Affiliated Hospital of Shenzhen University
- Shenzhen Key Laboratory of Neurosurgery
- Shenzhen
- China
| | - Yonghong He
- Institute of Optical Imaging and Sensing
- Shenzhen Key Laboratory for Minimal Invasive Medical Technologies
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 518055
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19
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Banerjee A, Pons T, Lequeux N, Dubertret B. Quantum dots-DNA bioconjugates: synthesis to applications. Interface Focus 2016; 6:20160064. [PMID: 27920898 PMCID: PMC5071820 DOI: 10.1098/rsfs.2016.0064] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Semiconductor nanoparticles particularly quantum dots (QDs) are interesting alternatives to organic fluorophores for a range of applications such as biosensing, imaging and therapeutics. Addition of a programmable scaffold such as DNA to QDs further expands the scope and applicability of these hybrid nanomaterials in biology. In this review, the most important stages of preparation of QD-DNA conjugates for specific applications in biology are discussed. Special emphasis is laid on (i) the most successful strategies to disperse QDs in aqueous media, (ii) the range of different conjugation with detailed discussion about specific merits and demerits in each case, and (iii) typical applications of these conjugates in the context of biology.
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Affiliation(s)
| | | | | | - Benoit Dubertret
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI ParisTech, CNRS UMR 8213, Université Pierre et Marie Curie, 10 Rue Vauquelin, 75005 Paris, France
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20
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Feng QM, Zhu MJ, Zhang TT, Xu JJ, Chen HY. A novel DNA tetrahedron–hairpin probe for in situ “off–on” fluorescence imaging of intracellular telomerase activity. Analyst 2016; 141:2474-80. [DOI: 10.1039/c6an00241b] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A DNA tetrahedron–hairpin probe with a high recovery efficiency is designed for in situ fluorescence imaging of intracellular telomerase activity.
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Affiliation(s)
- Qiu-Mei Feng
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- P.R. China
| | - Meng-Jiao Zhu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- P.R. China
| | - Ting-Ting Zhang
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- P.R. China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- P.R. China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- P.R. China
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21
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Li W, Jiang W, Ding Y, Wang L. Highly selective and sensitive detection of miRNA based on toehold-mediated strand displacement reaction and DNA tetrahedron substrate. Biosens Bioelectron 2015; 71:401-406. [DOI: 10.1016/j.bios.2015.04.067] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 04/20/2015] [Accepted: 04/21/2015] [Indexed: 12/18/2022]
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22
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Xu N, Wang Q, Lei J, Liu L, Ju H. Label-free triple-helix aptamer as sensing platform for "signal-on" fluorescent detection of thrombin. Talanta 2014; 132:387-91. [PMID: 25476322 DOI: 10.1016/j.talanta.2014.09.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 09/13/2014] [Accepted: 09/18/2014] [Indexed: 11/25/2022]
Abstract
The design of a label-free aptamer for separation of recognition sequence from signal reporter is significant to ensure the high-efficiency affinity between aptamer and target. This work develops a label-free triple-helix aptamer (THA) as sensing platform for "signal-on" fluorescent detection of thrombin. THA was composed of aptamer sequence and help DNA 1 (H1), which contained the complementary sequence of hexachloro-fluorescein (HEX) labeled help DNA 2 (H2). The specific recognition event between aptamer and thrombin triggered the dismission of THA to release H1. The released H1 then reacted with the signal probe of H2/graphene oxide (GO) nanocomposite to form H1-H2 duplex, leading to the fluorescence recovery of H2 due to the detachment of H1-H2 duplex from the surface of GO. With employment of THA as a signal transducer and GO as a "superquencher", this method shows a sensitive response to thrombin with a wide concentration range from 5 to 1200 nM. The limit of detection is 1.8 nM (S/N=3) with excellent selectivity. Considering the universality of THA, the proposed aptasensor would provide a platform for homogeneous fluorescent detection of a wide range of analytes.
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Affiliation(s)
- Nan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Quanbo Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Jianping Lei
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
| | - Lin Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
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23
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Ding Y, Liu X, Zhu J, Wang L, Jiang W. Quantitative single-molecule detection of protein based on DNA tetrahedron fluorescent nanolabels. Talanta 2014; 125:393-9. [DOI: 10.1016/j.talanta.2014.03.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 03/10/2014] [Accepted: 03/13/2014] [Indexed: 11/28/2022]
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24
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Pei H, Zuo X, Zhu D, Huang Q, Fan C. Functional DNA nanostructures for theranostic applications. Acc Chem Res 2014; 47:550-559. [PMID: 24380626 DOI: 10.1002/9781118998922.ch4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
There has been tremendous interest in constructing nanostructures by exploiting the unparalleled ability of DNA molecules in self-assembly. We have seen the appearance of many fantastic, "art-like" DNA nanostructures in one, two, or three dimensions during the last two decades. More recently, much attention has been directed to the use of these elegant nanoobjects for applications in a wide range of areas. Among them, diagnosis and therapy (i.e., theranostics) are of particular interest given the biological nature of DNA. One of the major barricades for the biosensor design lies in the restricted target accessibility at the solid-water interface. DNA nanotechnology provides a convenient approach to well control the biomolecule-confined surface to increase the ability of molecular recognition at the biosensing interface. For example, tetrahedral DNA nanostructures with thiol modifications can be self-assembled at the gold surface with high reproducibility. Since DNA tetrahedra are highly rigid and well-defined structures with atomic precision and versatile functionality, they provide scaffolds for anchoring of a variety of biomolecular probes (DNA, aptamers, peptides, and proteins) for biosensing. Significantly, this DNA nanostructure-based biosensing platform greatly increases target accessibility and improves the sensitivity for various types of molecular targets (DNA, RNA, proteins, and small molecules) by several orders of magnitude. In an alternative approach, DNA nanostructures provide a framework for the development of dynamic nanosensors that can function inside the cell. DNA tetrahedra are found to be facilely cell permeable and can sense and image specific molecules in cells. More importantly, these DNA nanostructures can be efficient drug delivery nanocarriers. Since they are DNA molecules by themselves, they have shown excellent cellular biocompatibility with minimal cytotoxicity. As an example, DNA tetrahedra tailored with CpG oligonucleotide drugs have shown greatly improved immunostimulatory effects that makes them a highly promising nanomedicine. By taking them together, we believe these functionalized DNA nanostructures can be a type of intelligent theranostic nanodevice for simultaneous sensing, diagnosis, and therapy inside the cell.
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Affiliation(s)
- Hao Pei
- Division of Physical Biology, and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Microscale Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
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25
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Jung CH, Hwang IT, Kuk IS, Choi JH, Oh BK, Lee YM. Poly(acrylic acid)-grafted fluoropolymer films for highly sensitive fluorescent bioassays. ACS APPLIED MATERIALS & INTERFACES 2013; 5:2155-60. [PMID: 23452270 DOI: 10.1021/am303197n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
In this study, a facile and effective method for the surface functionalization of inert fluoropolymer substrates using surface grafting was demonstrated for the preparation of a new platform for fluorescence-based bioassays. The surface of perfluorinated poly(ethylene-co-propylene) (FEP) films was functionalized using a 150 keV ion implantation, followed by the graft polymerization of acrylic acid, to generate a high density of carboxylic acid groups on the implanted surface. The resulting functionalized surface was investigated in terms of the surface density of carboxylic acid, wettability, chemical structure, surface morphology, and surface chemical composition. These results revealed that poly(acrylic acid) (PAA) was successfully grafted onto the implanted FEP surface and its relative amount depended on the fluence. To demonstrate the usefulness of this method for the fabrication of bioassays, the PAA-grafted FEP films were utilized for the immobilization of probe DNA for anthrax toxin, followed by hybridization with Cy3-labeled target DNA. Liver cancer-specific α-feto-protein (AFP) antigen was also immobilized on the PAA-grafted FEP films. Texas Red-labeled secondary antibody was reacted with AFP-specific primary antibody prebound to the AFP antigen using an immunoassay method. The results revealed that the fluorescence intensity clearly depended on the concentration of the target DNA hybridized to the probe DNA and the AFP antigen immobilized on the FEP films. The lowest detectable concentrations of the target DNA and the AFP antigen were 10 fg/mL and 10 pg/mL, respectively, with the FEP films prepared at a fluence of 3 × 10(14) ions/cm(2).
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Affiliation(s)
- Chan-Hee Jung
- Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup-si, Jeollabuk-do 580-185, Republic of Korea
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Zhang M, Jiang XQ, Le HN, Wang P, Ye BC. Dip-and-read method for label-free renewable sensing enhanced using complex DNA structures. ACS APPLIED MATERIALS & INTERFACES 2013; 5:473-478. [PMID: 23298262 DOI: 10.1021/am302321m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A label-free assay is reported in this work for the detection of DNA with enhanced sensitivity using complex DNA structures (DNA tetrahedrons) based on the biolayer interferometry. The DNA tetrahedrons help to amplify the optical signals of the biolayer interferometry, thus improving the detection limit of DNA by about 100-fold. We further demonstrated that this method could be expanded to ATP detection by taking advantage of the target-dependent adaptability of aptamers. It appears to us that this new label-free assay promises new opportunities for developing novel biolayer interferometry assays.
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