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Zhong Y, Li B, Xin H, Wang C. Endogenous mRNA-Driven "One-To-More" Signal Amplification of DNA Probe for Intracellular miR155 Sensing. Chem Asian J 2024:e202400401. [PMID: 38725283 DOI: 10.1002/asia.202400401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/02/2024] [Indexed: 06/13/2024]
Abstract
The detection of specific intracellular microRNAs could be potentially helpful in understanding the underlying mechanisms of cancer metastasis and invasion. MiRNAs are usually present in lower expression levels, especially in early stage of cancer. Here, we proposed a "one-to-more" amplification strategy for miRNA imaging, by virtue of DNA strand displacements with dual-amplification. This approach involves leveraging high-abundance endogenous mRNA as fuel strand to drive cascade reactions between DNA strands for amplification, enabling the monitoring of low-abundance intracellular microRNA155. Notably, in comparison to the traditional "one-to-one" signal triggering mode, our "one-to-more" amplification strategy led to a remarkable 11.8-fold increase in fluorescence signal. Our approach not only demonstrates a high sensitivity and specificity in detecting miR155, but also allows for discrimination of miR155 expression levels in different cell lines. With the advantages of intracellular signal amplification and reduced background signal, this approach holds substantial potential in the early diagnosis of cancer.
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Affiliation(s)
- Yan Zhong
- Department of Chemistry and Chemical Engineering, Inner Mongolia University, 235 West University Blvd., 010020, Hohhot, China
| | - Bo Li
- Department of Chemistry and Chemical Engineering, Inner Mongolia University, 235 West University Blvd., 010020, Hohhot, China
| | - Hui Xin
- Department of Chemistry and Chemical Engineering, Inner Mongolia University, 235 West University Blvd., 010020, Hohhot, China
| | - Chunyan Wang
- Department of Chemistry and Chemical Engineering, Inner Mongolia University, 235 West University Blvd., 010020, Hohhot, China
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2
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Xu H, Wu X, Liu Q, Yang C, Shen M, Wang Y, Liu S, Zhao S, Xiao T, Sun M, Ding Z, Bao J, Chen M, Gao M. A Universal Strategy for Enhancing the Circulating miRNAs' Detection Performance of Rolling Circle Amplification by Using a Dual-Terminal Stem-Loop Padlock. ACS NANO 2024; 18:436-450. [PMID: 38149638 PMCID: PMC10786163 DOI: 10.1021/acsnano.3c07721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 12/15/2023] [Accepted: 12/20/2023] [Indexed: 12/28/2023]
Abstract
Rolling circle amplification (RCA) is one of the most promising nucleic acid detection technologies and has been widely used in the molecular diagnosis of disease. Padlock probes are often used to form circular templates, which are the core of RCA. However, RCA often suffers from insufficient specificity and sensitivity. Here we report a reconstruction strategy for conventional padlock probes to promote their overall performance in nucleic acid detection while maintaining probe functions uncompromised. When two rationally designed stem-loops were strategically placed at the two terminals of linear padlock probes, the specificity of target recognition was enhanced and the negative signal was significantly delayed. Our design achieved the best single-base discrimination compared with other structures and over a 1000-fold higher sensitivity than that of the conventional padlock probe, validating the effectiveness of this reconstruction. In addition, the underlying mechanisms of our design were elucidated through molecular dynamics simulations, and the versatility was validated with longer and shorter padlocks targeting the same target, as well as five additional targets (four miRNAs and dengue virus - 2 RNA mimic (DENV-2)). Finally, clinical applicability in multiplex detection was demonstrated by testing real plasma samples. Our exploration of the structures of nucleic acids provided another perspective for developing high-performance detection systems, improving the efficacy of practical detection strategies, and advancing clinical diagnostic research.
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Affiliation(s)
- Hanqing Xu
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Xianlan Wu
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Qian Liu
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Cheng Yang
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Man Shen
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Yingran Wang
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Shuai Liu
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Shuang Zhao
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Ting Xiao
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Minghui Sun
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Zishan Ding
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Jing Bao
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
| | - Ming Chen
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
- College
of Pharmacy and Laboratory Medicine, Third
Military Medical University (Army Medical University), 30 Gaotanyan, Shapingba District, Chongqing 400038, P. R. China
| | - Mingxuan Gao
- Department
of Clinical Laboratory Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, P. R. China
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3
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Chen H, Liu Y, Feng S, Cao Y, Wu T, Liu Z. Cotton thread-based multi-channel photothermal biosensor for simultaneous detection of multiple microRNAs. Biosens Bioelectron 2021; 200:113913. [PMID: 34968855 DOI: 10.1016/j.bios.2021.113913] [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: 10/29/2021] [Revised: 12/15/2021] [Accepted: 12/21/2021] [Indexed: 02/07/2023]
Abstract
The abnormal expression of microRNAs (miRNAs) is associated with various diseases. Developing simple and portable methods for sensitive, rapid and simultaneous detection of multiple miRNAs is critical to achieve accurate and timely diagnosis. Herein, a cotton thread-based multi-channel photothermal biosensor was proposed for simultaneous detection of three breast cancer-related miRNAs including miRNA-10b, miRNA-27a and miRNA-let-7a. Three cotton thread-based channels with one input were designed and the capture probes for detecting different miRNAs were immobilized on the test zones of the corresponding channels. Cu2-xS nanostrings prepared on the basis of hybridization chain reaction (HCR) were taken as the photothermal agents for signal transduction and amplification. The formation of a sandwich structure among the capture probe, target miRNA, and Cu2-xS nanostrings led to the accumulation of the Cu2-xS nanostrings on the test zones and transformed the concentration of miRNA into temperature signal under 808 nm laser irradiation. The temperature changes were quantified by a portable thermal camera and directly reflected the concentration of miRNAs. Under the optimal conditions, the developed multi-channel photothermal biosensor showed excellent specificity and sensitivity with the detection limits of 37 pM, 38 pM and 38 pM for miRNA-10b, miRNA-27a and miRNA-let-7a, respectively. Furthermore, a simultaneous detection of the three miRNAs in cell lysates were achieved and the results were in accordance with that obtained by the quantitative reverse transcription polymerase chain reaction (qRT-PCR), indicating its excellent capacity for practical applications. The developed biosensor provided an important tool for analysis of multiple targets and showed great potential in clinical diagnosis.
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Affiliation(s)
- Hanjun Chen
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China
| | - Ying Liu
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China
| | - Shaoqiong Feng
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, PR China
| | - Yu Cao
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China
| | - Tingting Wu
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China.
| | - Zhihong Liu
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, PR China
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4
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Li J, Liu S, Wang J, Liu R, Yang X, Wang K, Huang J. Photocaged amplified FRET nanoflares: spatiotemporal controllable of mRNA-powered nanomachines for precise and sensitive microRNA imaging in live cells. Nucleic Acids Res 2021; 50:e40. [PMID: 34935962 PMCID: PMC9023253 DOI: 10.1093/nar/gkab1258] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 11/24/2021] [Accepted: 12/21/2021] [Indexed: 12/18/2022] Open
Abstract
There is considerable interest in creating a precise and sensitive strategy for in situ visualizing and profiling intracellular miRNA. Present here is a novel photocaged amplified FRET nanoflare (PAFN), which spatiotemporal controls of mRNA-powered nanomachine for precise and sensitive miRNA imaging in live cells. The PAFN could be activated remotely by light, be triggered by specific low-abundance miRNA and fueled by high-abundance mRNA. It offers high spatiotemporal control over the initial activity of nanomachine at desirable time and site, and a ‘one-to-more’ ratiometric signal amplification model. The PAFN, an unprecedented design, is quiescent during the delivery process. However, upon reaching the interest tumor site, it can be selectively activated by light, and then be triggered by specific miRNA, avoiding undesirable early activation and reducing nonspecific signals, allowing precise and sensitive detection of specific miRNA in live cells. This strategy may open new avenues for creating spatiotemporally controllable and endogenous molecule-powered nanomachine, facilitating application at biological and medical imaging.
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Affiliation(s)
- Jing Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, P.R. China.,School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, P.R. China
| | - Shiyuan Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, P.R. China
| | - Jiaoli Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, P.R. China
| | - Ruiting Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, P.R. China
| | - Xiaohai Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, P.R. China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, P.R. China
| | - Jin Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, P.R. China
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5
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Huang G, Su C, Wang L, Fei Y, Yang J. The Application of Nucleic Acid Probe-Based Fluorescent Sensing and Imaging in Cancer Diagnosis and Therapy. Front Chem 2021; 9:705458. [PMID: 34141699 PMCID: PMC8204288 DOI: 10.3389/fchem.2021.705458] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 05/17/2021] [Indexed: 01/27/2023] Open
Abstract
It is well known that cancer incidence and death rates have been growing, but the development of cancer theranostics and therapeutics has been a challenging work. Recently, nucleic acid probe-based fluorescent sensing and imaging have achieved remarkable improvements in a variety of cancer management techniques, credited to their high sensitivity, good tolerance to interference, fast detection, and high versatility. Herein, nucleic acid probe-based fluorescent sensing and imaging are labeled with advanced fluorophores, which are essential for fast and sensitive detection of aberrant nucleic acids and other cancer-relevant molecules, consequently performing cancer early diagnosis and targeted treatment. In this review, we introduce the characteristics of nucleic acid probes, summarize the development of nucleic acid probe-based fluorescent sensing and imaging, and prominently elaborate their applications in cancer diagnosis and treatment. In discussion, some challenges and perspectives are elaborated in the field of nucleic acid probe-based fluorescent sensing and imaging.
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Affiliation(s)
- Ge Huang
- Department of Medicine, University of South China, Hengyang, China.,Department of Anesthesiology and Pain Medicine, Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, China
| | - Chen Su
- Department of Anesthesiology and Pain Medicine, Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, China
| | - Lijuan Wang
- Department of Medicine, University of South China, Hengyang, China.,Department of Anesthesiology and Pain Medicine, Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, China
| | - Yanxia Fei
- Department of Anesthesiology and Pain Medicine, Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, China
| | - Jinfeng Yang
- Department of Anesthesiology and Pain Medicine, Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, China
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6
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Kang J, Tahir A, Wang H, Chang J. Applications of nanotechnology in virus detection, tracking, and infection mechanisms. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2021; 13:e1700. [PMID: 33511770 PMCID: PMC7995016 DOI: 10.1002/wnan.1700] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 12/30/2020] [Accepted: 12/30/2020] [Indexed: 12/24/2022]
Abstract
Viruses are among the most infectious pathogens, responsible for the highest death toll around the world. Lack of effective clinical drug for most of the viruses emphasizes the rapid and accurate diagnosis at early stages of infection to prevent rapid spread of the pathogens. Nanotechnology is an emerging field with applications in various domains, where nano‐biomedical science has many significant contributions such as effective delivery of drugs/therapeutic molecules to specific organs, imaging, sensitive detection of virus, and their accurate tracking in host cells. The nanomaterials reported for virus detection and tracking mainly include magnetic and gold NPs, ZnO/Pt‐Pd, graphene, and quantum dots (QDs). In addition, the single virus tracking technology (SVT) allowed to track the life cycle stages of an individual virus for better understanding of their dynamics within the living cells. Inorganic as well as non‐metallic fluorescent materials share the advantages of high photochemical stability, a wide range of light absorption curves and polychromatic emission. Hence, are considered as potential fluorescent nano‐probes for SVT. However, there are still some challenges: (i) clinical false positive rate of some detection methods is still high; (ii) in the virus tracking process, less adaptability of QDs owing to larger size, flicker, and possible interference with virus function; and (iii) in vivo tracking of a single virus, in real time needs further refinement. In the future, smaller, non‐toxic, and chemically stable nanomaterials are needed to improve the efficiency and accuracy of detection, and monitoring of virus infections to curb the mortalities. This article is categorized under:Therapeutic Approaches and Drug Discovery > Nanomedicine for Infectious Disease Biology‐Inspired Nanomaterials > Protein and Virus‐Based Structures
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Affiliation(s)
- Jun Kang
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Ayesha Tahir
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Hanjie Wang
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Jin Chang
- School of Life Sciences, Tianjin University, Tianjin, China
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7
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Wu Y, Cui S, Li Q, Zhang R, Song Z, Gao Y, Chen W, Xing D. Recent advances in duplex-specific nuclease-based signal amplification strategies for microRNA detection. Biosens Bioelectron 2020; 165:112449. [DOI: 10.1016/j.bios.2020.112449] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/06/2020] [Accepted: 07/12/2020] [Indexed: 02/06/2023]
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8
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Chen M, Li H, Shi Z, Peng W, Qin Y, Luo R, Zhou D, Gong X, Chang J. High fluorescence quenching probe-based reverse fluorescence enhancement LFTS coupling with IS-primer amplification reaction for the rapid and sensitive Parkinson Disease-associated MicroRNA detection. Biosens Bioelectron 2020; 165:112278. [DOI: 10.1016/j.bios.2020.112278] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 04/28/2020] [Accepted: 05/04/2020] [Indexed: 02/07/2023]
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9
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Zhu Q, Li H, Xu D. Sensitive and enzyme-free fluorescence polarization detection for miRNA-21 based on decahedral sliver nanoparticles and strand displacement reaction. RSC Adv 2020. [DOI: 10.1039/d0ra01950j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
A highly sensitive method for miRNA-21 detection has been developed, which relied on the principle of strand displacement reaction to achieve asymmetric signal amplification and combined with the enhanced effect of Ag10NPs.
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Affiliation(s)
- Qingyue Zhu
- State Key Laboratory of Analytical Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- China
| | - Hui Li
- State Key Laboratory of Analytical Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- China
| | - Danke Xu
- State Key Laboratory of Analytical Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- China
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10
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Fluorometric determination of microRNA by using an entropy-driven three-dimensional DNA walking machine based on a catalytic hairpin assembly reaction on polystyrene microspheres. Mikrochim Acta 2019; 186:574. [PMID: 31342252 DOI: 10.1007/s00604-019-3689-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 07/07/2019] [Indexed: 02/06/2023]
Abstract
An entropy-driven 3-D DNA walking machine is presented which involves catalytic hairpin assembly (CHA) for detection of microRNA. A 3-D DNA walking machine was designed that uses streptavidin-coated polystyrene microspheres as track carriers to obtain reproducibility. The method was applied to microRNA 21 as a model analyte. Continuous walking on the DNA tracks is achieved via entropy increase. This results in a disassembly of ternary DNA substrates on polystyrene microspheres and leads to cycling of microRNA 21. The release of massive auxiliary strands from ternary DNA substrates induces the CHA. This is accompanied by in increase in fluorescence, best measured at excitation/emission wavelengths of 480/520 nm. On account of entropy-driven reaction, the assay is remarkably selective. It can differentiate microRNA 21 from homologous microRNAs in giving a signal that is less than 5% of the signal for microRNA 21 except for microRNA-200b. The assay works in the 50 pM to 20 nM concentration range and has a 41 pM detection limit. The method displays good reproducibility (between 1.1 and 4.2%) and recovery (from 99.8 to 104.0%). Graphical abstract An entropy-driven 3-D DNA walking machine is described. It is based on the use of polystyrene microspheres and of a catalytic hairpin assembly reaction for sensitive microRNA detection. Figure Notes: AS represents auxiliary strand; S represents substrate strand; LS represents link strand; F represents fuel nucleic acid; RepF represents nucleic acid labeled with FAM; RepQ represents nucleic acid labeled with BHQ1.
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11
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Huang J, Shangguan J, Guo Q, Ma W, Wang H, Jia R, Ye Z, He X, Wang K. Colorimetric and fluorescent dual-mode detection of microRNA based on duplex-specific nuclease assisted gold nanoparticle amplification. Analyst 2019; 144:4917-4924. [PMID: 31313769 DOI: 10.1039/c9an01013k] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
MicroRNAs (miRNAs) are attractive candidates for biomarkers for early cancer diagnosis, and play vital roles in physiological and pathological processes. In this work, we developed a colorimetric and fluorescent dual-mode sensor for miRNA detection based on the optical properties of gold nanoparticles (AuNPs) and the duplex-specific nuclease (DSN)-assisted signal amplification technique. In brief, FAM labelled hairpin probes (HPs) were immobilized on AuNPs, and fluorescence was efficiently quenched by the vicinity of the fluorophores to the AuNPs surface. In the presence of target miRNAs, the HPs could specifically hybridize with miRNAs and the DNA strand in the DNA/RNA heteroduplexes could be subsequently hydrolyzed by DSN. As a result, numbers of fluorophores were released into the solution, resulting in obvious fluorescence signal recovery. Meanwhile, the target miRNAs were able to participate in other hybridization reactions. With the DSN-assisted signal amplification technique, lots of gold nanoparticles were produced with short-chain DNA on their surface, which could aggregate in salt solution and result in a colorimetric detection. The proposed dual-mode strategy offers a sensitive, accurate and selective detection method for miRNAs. One reason is that the stem of the HPs was elaborately designed to avoid hydrolyzation by DSN under optimal conditions, which ensures a relatively low background and high sensitivity. The other is that the dual-mode strategy is more beneficial for enhancing the accuracy and reproducibility of the measurements. Moreover, the unique selective-cutting ability and single-base mismatch differentiation capability of the DSN also give rise to a satisfactory selectivity. This demonstrated that the developed method could quantitatively detect miR-21 down to 50 pM with a linear calibration range from 50 pM to 1 nM, and the analytical assay of target miRNAs in cell lysate samples revealed its great potential for application in biomedical research and clinical diagnostics.
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Affiliation(s)
- Jin Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
| | - Jingfang Shangguan
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China.
| | - Qiuping Guo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
| | - Wenjie Ma
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
| | - Huizhen Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
| | - Ruichen Jia
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
| | - Zi Ye
- High School of Yali, Changsha, Hunan 410007, China
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
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