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Chauhan K, Kim DM, Cho E, Kim DE. Facilitation of Dye-Based Quantitative Real-Time Polymerase Chain Reaction with Poly(ethylene glycol)-Engrafted Graphene Oxide. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1348. [PMID: 37110934 PMCID: PMC10144433 DOI: 10.3390/nano13081348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/08/2023] [Accepted: 04/10/2023] [Indexed: 06/19/2023]
Abstract
Quantitative real-time polymerase chain reaction (qPCR) is an important and extensively utilized technique in medical and biotechnological applications. qPCR enables the real-time detection of nucleic acid during amplification, thus surpassing the necessity of post-amplification gel electrophoresis for amplicon detection. Despite being widely employed in molecular diagnostics, qPCR exhibits limitations attributed to nonspecific DNA amplification that compromises the efficiency and fidelity of qPCR. Herein, we demonstrate that poly(ethylene glycol)-engrafted nanosized graphene oxide (PEG-nGO) can significantly improve the efficiency and specificity of qPCR by adsorbing single-stranded DNA (ssDNA) without affecting the fluorescence of double-stranded DNA binding dye during DNA amplification. PEG-nGO adsorbs surplus ssDNA primers in the initial phase of PCR, having lower concentrations of DNA amplicons and thus minimizing the nonspecific annealing of ssDNA and false amplification due to primer dimerization and erroneous priming. As compared to conventional qPCR, the addition of PEG-nGO and the DNA binding dye, EvaGreen, in the qPCR setup (dubbed as PENGO-qPCR) significantly enhances the specificity and sensitivity of DNA amplification by preferential adsorption of ssDNA without inhibiting DNA polymerase activity. The PENGO-qPCR system for detection of influenza viral RNA exhibited a 67-fold higher sensitivity than the conventional qPCR setup. Thus, the performance of a qPCR can be greatly enhanced by adding PEG-nGO as a PCR enhancer as well as EvaGreen as a DNA binding dye to the qPCR mixture, which exhibits a significantly improved sensitivity of the qPCR.
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2
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Kim BK, Lee SA, Park M, Jeon EJ, Kim MJ, Kim JM, Kim H, Jung S, Kim SK. Ultrafast Real-Time PCR in Photothermal Microparticles. ACS NANO 2022; 16:20533-20544. [PMID: 36475304 PMCID: PMC9799066 DOI: 10.1021/acsnano.2c07017] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 11/07/2022] [Indexed: 05/20/2023]
Abstract
As the turnaround time of diagnosis becomes important, there is an increasing demand for rapid, point-of-care testing (POCT) based on polymerase chain reaction (PCR), the most reliable diagnostic tool. Although optical components in real-time PCR (qPCR) have quickly become compact and economical, conventional PCR instruments still require bulky thermal systems, making it difficult to meet emerging needs. Photonic PCR, which utilizes photothermal nanomaterials as heating elements, is a promising platform for POCT as it reduces power consumption and process time. Here, we develop a photonic qPCR platform using hydrogel microparticles. Microparticles consisting of hydrogel matrixes containing photothermal nanomaterials and primers are dubbed photothermal primer-immobilized networks (pPINs). Reduced graphene oxide is selected as the most suitable photothermal nanomaterial to generate heat in pPIN due to its superior light-to-heat conversion efficiency. The photothermal reaction volume of 100 nL (predefined by the pPIN dimensions) provides fast heating and cooling rates of 22.0 ± 3.0 and 23.5 ± 2.6 °C s-1, respectively, enabling ultrafast qPCR within 5 min only with optical components. The microparticle-based photonic qPCR facilitates multiplex assays by loading multiple encoded pPIN microparticles in a single reaction. As a proof of concept, four-plex pPIN qPCR for bacterial discrimination are successfully demonstrated.
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Affiliation(s)
- Bong Kyun Kim
- Division
of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology (UST), Daejeon 34113, Korea
- BioActs
Co., Ltd., Incheon 21666, Korea
- Center
for Augmented Safety Systems with Intelligence, Sensing and Tracking
(ASSIST), KIST, Seoul 02792, Korea
| | - Sang-A Lee
- Center
for Augmented Safety Systems with Intelligence, Sensing and Tracking
(ASSIST), KIST, Seoul 02792, Korea
| | - Minju Park
- Soft
Hybrid Materials Research Center, KIST, Seoul 02792, Korea
| | - Eui Ju Jeon
- Center
for Augmented Safety Systems with Intelligence, Sensing and Tracking
(ASSIST), KIST, Seoul 02792, Korea
| | - Mi Jung Kim
- Center
for Augmented Safety Systems with Intelligence, Sensing and Tracking
(ASSIST), KIST, Seoul 02792, Korea
| | - Jung Min Kim
- Center
for Augmented Safety Systems with Intelligence, Sensing and Tracking
(ASSIST), KIST, Seoul 02792, Korea
| | - Heesuk Kim
- Soft
Hybrid Materials Research Center, KIST, Seoul 02792, Korea
- Division
of Energy and Environmental Technology, KIST School, UST, Daejeon 34113, Korea
| | - Seungwon Jung
- Center
for Advanced Biomolecular Recognition, KIST, Seoul 02792, Korea
- Department
of HY-KIST Bio-convergence, Hanyang University, Seoul 04763, Korea
- Center
for Augmented Safety Systems with Intelligence, Sensing and Tracking
(ASSIST), KIST, Seoul 02792, Korea
| | - Sang Kyung Kim
- Center
for Advanced Biomolecular Recognition, KIST, Seoul 02792, Korea
- KHU-KIST
Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Korea
- Center
for Augmented Safety Systems with Intelligence, Sensing and Tracking
(ASSIST), KIST, Seoul 02792, Korea
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3
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Karami A, Hasani M, Azizi Jalilian F, Ezati R. Conventional PCR assisted single-component assembly of spherical nucleic acids for simple colorimetric detection of SARS-CoV-2. SENSORS AND ACTUATORS. B, CHEMICAL 2021; 328:128971. [PMID: 33012989 PMCID: PMC7521892 DOI: 10.1016/j.snb.2020.128971] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/17/2020] [Accepted: 09/24/2020] [Indexed: 05/02/2023]
Abstract
Continuous identification of suspected infectious cases is crucial to control the recent pandemic caused by the novel human coronavirus SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2). Real-time polymerase chain reaction (real-time PCR) technology cannot be implemented easily and in large scale in some communities due to lack of resources and infrastructures. Here, we report a simple colorimetric strategy derived from linker-based single-component assembly of gold nanoparticle-core spherical nucleic acids (AuNP-core SNAs) for visual detection of PCR products of SARS-CoV-2 ribonucleic acid (RNA) template. A palindromic linker is designed based on SARS-CoV-2 specific E gene to program the identical colloidal SNAs into large assemblies along with a distinct red-to-purple color change. The linker acts as a probe of SARS-CoV-2 RNA in conventional PCR reaction. In the presence of the correct template the palindromic linker, which is complementary to a short region within the target amplicon, is cleaved by 5'-exonuclease activity of deoxyribonucleic acid (DNA) polymerase. Cleavage of the palindromic linker during the amplification process inhibits the single-component assembly formation of SNAs. So, positive and negative viral samples produce simply red and purple colors in the post PCR colorimetric test, respectively. Evaluation of the samples obtained from cases with laboratory-confirmed SARS-CoV-2 infection revealed that our assay can rival with real-time PCR method in sensitivity.
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Affiliation(s)
- Abbas Karami
- Faculty of Chemistry, Bu-Ali Sina University, Hamedan, 65174, Iran
| | - Masoumeh Hasani
- Faculty of Chemistry, Bu-Ali Sina University, Hamedan, 65174, Iran
| | - Farid Azizi Jalilian
- Department of Medical Virology, Faculty of Medicine, Hamedan University of Medical Sciences, Hamedan, Iran
| | - Razieh Ezati
- Department of Molecular Diagnosis, Farzan Molecular and Pathobiology Laboratory, Hamedan, Iran
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4
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Charoenpakdee C, Vilaivan T. Quenching of fluorescently labeled pyrrolidinyl peptide nucleic acid by oligodeoxyguanosine and its application in DNA sensing. Org Biomol Chem 2020; 18:5951-5962. [PMID: 32696797 DOI: 10.1039/d0ob01299h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Quenching by nucleobases can significantly affect the fluorescence properties of many fluorophores. The quenching efficiency depends on the electronic properties of the fluorophore and adjacent nucleobases. In this study, we present a hitherto unreported high-efficiency quenching (up to 90%) of various fluorescently labeled pyrrolidinyl peptide nucleic acid (acpcPNA) probes by oligodeoxyguanosine (dGX). The quenching principle relies on the electrostatic interaction between the positively charged lysine-modified acpcPNA probe and the negatively charged oligodeoxyguanosine. The addition of stoichiometric quantities of a DNA target with the sequence complementary to the PNA probe restored the fluorescence to the original level. This was explained by the binding of the DNA to the PNA via a specific base pairing, which resulted in the separation of the oligodeoxyguanosine quencher from the fluorophore. Much less fluorescence restoration was observed in the DNA containing one or more mismatched bases. Applications of the oligodeoxyguanosine-quenched PNA probes for DNA sequence determination, including in multiplex formats, are demonstrated. The performance in terms of sensitivity and mismatch discrimination is comparable to classical PNA-based molecular beacons but without the need for double-labeling, which is expensive and presents solubility issues, or a dedicated quencher probe. This exemplifies a novel use of the unique electrostatic properties of PNA to develop a DNA sensing platform for DNA sequence determination.
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Affiliation(s)
- Chayan Charoenpakdee
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand.
| | - Tirayut Vilaivan
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand.
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5
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Hu C, Yang Z, Song Z, Xiao L, He Y. A strategy for preparing non-fluorescent graphene oxide quantum dots as fluorescence quenchers in quantitative real-time PCR. RSC Adv 2020; 10:14944-14952. [PMID: 35497124 PMCID: PMC9052102 DOI: 10.1039/d0ra00142b] [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: 01/06/2020] [Accepted: 04/06/2020] [Indexed: 12/16/2022] Open
Abstract
In recent years, graphene oxide quantum dots (GOQDs) have emerged as novel nanomaterials for optical sensing, bioimaging, clinical testing, and environmental testing. However, GOQDs demonstrate unique photoluminescence properties, with GOQDs having quantum limitations and edge effects that often affect the accuracy of the test results in the sensory field. Herein, GOQDs with a large content of hydroxyl groups and low fluorescence intensity were first prepared via an improved Fenton reaction in this study, which introduces a large amount of epoxy groups to break the C-C bonds. The synthesized GOQDs show no significant variation in the fluorescence intensity upon ultraviolet and visible light excitations. We further utilized the GOQDs as fluorescence quenchers for different fluorescent dyes in real-time fluorescence quantitative polymerase chain reaction (qRT-PCR), and verified that the addition of GOQDs (5.3 μg ml-1) into a qRT-PCR system could reduce the background fluorescence intensity of the reaction by fluorescence resonance energy transfer (FRET) during its initial stage and its non-specific amplification, and improve its specificity. In addition, the qRT-PCR method could detect two different lengths of DNA sequences with a high specificity in the 104 to 1010 copies per μl range. It is of paramount importance to carry out further investigations to establish an efficient, sensitive, and specific RT-PCR method based on the use of GOQD nanomaterials as fluorescence quenchers.
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Affiliation(s)
- Chenyan Hu
- College of Medical Technology, State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Zhongzhu Yang
- College of Medical Technology, State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Zhen Song
- College of Medical Technology, State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Linghui Xiao
- Hospital of Chengdu University of Traditional Chinese Medicine Chengdu 610075 China
| | - Yang He
- College of Medical Technology, State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
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6
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Fluorometric Detection of Oncogenic EML4-ALK Fusion Gene based on a Graphene Oxide System. BIOCHIP JOURNAL 2019. [DOI: 10.1007/s13206-019-3408-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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7
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Lin Q, Ye X, Huang Z, Yang B, Fang X, Chen H, Kong J. Graphene Oxide-Based Suppression of Nonspecificity in Loop-Mediated Isothermal Amplification Enabling the Sensitive Detection of Cyclooxygenase-2 mRNA in Colorectal Cancer. Anal Chem 2019; 91:15694-15702. [PMID: 31725282 DOI: 10.1021/acs.analchem.9b03861] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cyclooxygenase-2 (COX2) mRNA represents a key biomarker for identifying subjects with colorectal cancer (CRC), while there is still no rapid and sensitive detection method for COX2 mRNA. Loop-mediated isothermal amplification (LAMP) is extensively developed for the amplification of nucleic acids; however, its application is frequently hindered by serious nonspecific amplification. Herein, this work reported a graphene oxide (GO)-based LAMP method to enable the one-step detection of COX2 mRNA in cancer cells and serum samples. We found that GO greatly enhanced the specificity of LAMP through decreasing nonspecific hybridization and the fluorescence background signal because of the simultaneous adsorption of single-stranded primers and DNA staining dyes on GO. The detection limit of developed GO-based LAMP was 2 orders of magnitude more sensitive compared to that of classical LAMP. Then a GO-based reverse transcription (RT)-LAMP strategy was further developed and applied to detect COX2 mRNA in CRC cancer cells and serum samples with high specificity. The GO-based LAMP platform with advantages of low cost, simplicity, high specificity, and sensitivity holds considerable potential for real-time fluorescence monitoring of nucleic acid amplification in a wide range of fields.
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Affiliation(s)
- Qiuyuan Lin
- Department of Chemistry , Fudan University , Shanghai 200438 , P. R. China
| | - Xin Ye
- Department of Chemistry , Fudan University , Shanghai 200438 , P. R. China
| | - Zhipeng Huang
- Department of Chemistry , Fudan University , Shanghai 200438 , P. R. China
| | - Bin Yang
- Department of Chemistry , Fudan University , Shanghai 200438 , P. R. China
| | - Xueen Fang
- Department of Chemistry , Fudan University , Shanghai 200438 , P. R. China
| | - Hui Chen
- Department of Chemistry , Fudan University , Shanghai 200438 , P. R. China
| | - Jilie Kong
- Department of Chemistry , Fudan University , Shanghai 200438 , P. R. China
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8
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Xu X, Xing S, Xu M, Fu P, Gao T, Zhang X, Zhao Y, Zhao C. Highly sensitive and specific screening of EGFR mutation using a PNA microarray-based fluorometric assay based on rolling circle amplification and graphene oxide. RSC Adv 2019; 9:38298-38308. [PMID: 35540182 PMCID: PMC9075832 DOI: 10.1039/c9ra06758b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/16/2019] [Indexed: 01/23/2023] Open
Abstract
Screening epidermal growth factor receptor (EGFR) mutations, especially deletions, is essential for diagnosis of non-small cell lung cancer (NSCLC) and also critical to inform treatment decisions for NSCLC patients. Here, we demonstrated a facile peptide nucleic acid (PNA) microarray-based fluorometric method for sensitive and specific detection of EGFR mutation, using rolling circle amplification (RCA), graphene oxide (GO), and a fluorescently-labeled detection probe (F-DP). First, the EGFR gene sequence was efficiently captured by the label-free PNA probe which was attached on the surface of a 96-well plate. And then, the EGFR mutation sequence was specifically amplified by RCA using the circular DNA, which was formed by the ligation of the padlock probe when hybridizing with the EGFR mutation, as a template. The single-stranded RCA product (RCAP) was then sensitively detected with the F-DP and GO system. This method has a detection limit of 0.3 pM for EGFR mutation and a high discrimination capability to target EGFR mutation against EGFR wildtype. The use of a PNA microarray and a fluorescence quenching platform make this system quite suitable for high-throughput analysis of EGFR mutations in resource-limited settings without the need of costly and cumbersome equipment. Furthermore, this detection system provides a novel way for the diagnosis of other diseases that are caused by gene deletion mutations.
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Affiliation(s)
- Xiaojun Xu
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
- Institute of Pharmaceutical Chemistry, Zhejiang Pharmaceutical College Ningbo 315100 P. R. China
| | - Shu Xing
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
| | - Mengjia Xu
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Pan Fu
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Tingting Gao
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
| | - Xiaokang Zhang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
| | - Yang Zhao
- College of Science and Technology, Ningbo University Ningbo 315212 P. R. China
| | - Chao Zhao
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
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9
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Fluorometric detection of influenza viral RNA using graphene oxide. Anal Biochem 2018; 561-562:66-69. [DOI: 10.1016/j.ab.2018.09.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 09/20/2018] [Accepted: 09/20/2018] [Indexed: 12/26/2022]
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10
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Ye X, Li Y, Wang L, Fang X, Kong J. A novel exonuclease-assisted isothermal nucleic acid amplification with ultrahigh specificity mediated by full-length Bst DNA polymerase. Chem Commun (Camb) 2018; 54:10562-10565. [PMID: 30065993 DOI: 10.1039/c8cc04577a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Here, we introduced a novel exonuclease-assisted isothermal nucleic acid amplification (Exo-NAT) utilizing the full-length Bst DNA polymerase combined with a melting curve analysis. This method achieved an ultrahigh specificity with a good detection limit (102 copies) in both singleplex and multiplex detection, which was validated by detecting three diarrhea-inducing pathogens, rotavirus A, astrovirus, and adenovirus, in 42 clinical samples.
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Affiliation(s)
- Xin Ye
- Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, P. R. China.
| | - Yang Li
- Shanghai Suchuang Diagnostic Products Co., Ltd, Shanghai 201318, P. R. China and Shanghai Suxin Biotechnology Co. Ltd, Shanghai 201318, P. R. China
| | - Lijuan Wang
- Shanghai Suchuang Diagnostic Products Co., Ltd, Shanghai 201318, P. R. China and Shanghai Suxin Biotechnology Co. Ltd, Shanghai 201318, P. R. China
| | - Xueen Fang
- Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, P. R. China.
| | - Jilie Kong
- Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, P. R. China.
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11
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An ultrasensitive and switch-on platform for aflatoxin B1 detection in peanut based on the fluorescence quenching of graphene oxide-gold nanocomposites. Talanta 2018; 181:346-351. [DOI: 10.1016/j.talanta.2018.01.039] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 12/29/2017] [Accepted: 01/15/2018] [Indexed: 01/24/2023]
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12
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Kim DM, Kim DH, Jung W, Lee KY, Kim DE. Fluorometric detection of EGFR exon 19 deletion mutation in lung cancer cells using graphene oxide. Analyst 2018; 143:1797-1804. [PMID: 29561562 DOI: 10.1039/c8an00098k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Mutations in epidermal growth factor receptor (EGFR) are known as biomarkers that cause non-small cell lung cancer. Particularly, approximately 45% of non-small cell lung cancer patients possess a deletion in exon 19 of the EGFR gene. A less invasive method for detecting the EGFR mutation is required; thus, we developed a simple polymerase chain reaction (PCR)-based method for detecting EGFR exon 19 deletion by using a quencher-free fluorescent probe DNA and graphene oxide (GO). In the presence of the exon 19 deletion mutation, the fluorophore-labeled DNA probe was designed to be fully complementary to the mutant sequences. The fully annealed DNA probe was degraded by the 5' to 3' exonuclease activity of Taq DNA polymerase during PCR, releasing the fluorophore from the probe DNA. In contrast, a wild-type gene only allowed partial annealing of the probe DNA to the amplicon because of the absence of the deletion sequences, with Taq polymerase digestion releasing unannealed fragments of probe DNA. When GO was added to each reaction solution, starkly different fluorescence signals were obtained; enhanced fluorescence was observed because of the released fluorophore from the probe DNA that was not adsorbed onto GO, whereas fluorescence was quenched when the fragmented single-stranded probe DNA was readily adsorbed onto GO. Our method enabled the detection of as low as 49 pg of EGFR exon 19 deletion DNA with a detection limit of 0.1% when the mutant genomic DNA was mixed with wild-type DNA.
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Affiliation(s)
- Dong-Min Kim
- Department of Bioscience and Biotechnology, Konkuk University, Gwangjin-gu, Seoul 05029, Republic of Korea.
| | - Dong Ho Kim
- Department of Pediatrics, Korea Cancer Center Hospital, Nowon-gu, Seoul 01812, Republic of Korea
| | - Woong Jung
- Department of Emergency Medicine, Kyung Hee University Hospital, Kangdong-gu, Seoul 05278, Republic of Korea
| | - Kye Young Lee
- Department of Internal Medicine, Konkuk University Medical Center, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Dong-Eun Kim
- Department of Bioscience and Biotechnology, Konkuk University, Gwangjin-gu, Seoul 05029, Republic of Korea.
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13
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Zhang H, Liu X, Liu M, Gao T, Huang Y, Liu Y, Zeng W. Gene detection: An essential process to precision medicine. Biosens Bioelectron 2018; 99:625-636. [DOI: 10.1016/j.bios.2017.08.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 08/12/2017] [Indexed: 01/08/2023]
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14
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Song J, Hoa VM, Yoo J, Oh S, Im H, Park D, Lee G. A graphene oxide-based tool-kit capable of characterizing and classifying exonuclease activities. RSC Adv 2017. [DOI: 10.1039/c7ra00388a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Exonuclease kinetics and classification assay by graphene oxide-based fluorometric quenching.
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Affiliation(s)
- Jayeon Song
- Department of Biomedical Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
| | - Vo Minh Hoa
- School of Life Sciences
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
| | - Jungmin Yoo
- School of Life Sciences
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
| | - Sanghoon Oh
- Department of Biomedical Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
| | - Hyeryeon Im
- School of Life Sciences
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
| | - Daeho Park
- School of Life Sciences
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
| | - Gwangrog Lee
- Department of Biomedical Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
- School of Life Sciences
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15
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Kim HR, Baek A, Lee IJ, Kim DE. Facilitation of Polymerase Chain Reaction with Poly(ethylene glycol)-Engrafted Graphene Oxide Analogous to a Single-Stranded-DNA Binding Protein. ACS APPLIED MATERIALS & INTERFACES 2016; 8:33521-33528. [PMID: 27960406 DOI: 10.1021/acsami.6b13223] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Polymerase chain reaction (PCR), a versatile DNA amplification method, is a fundamental technology in modern life sciences and molecular diagnostics. After multiple rounds of PCR, however, nonspecific DNA fragments are often produced and the amplification efficiency and fidelity decrease. Here, we demonstrated that poly(ethylene glycol)-engrafted nanosized graphene oxide (PEG-nGO) can significantly improve the PCR specificity and efficiency. PEG-nGO allows the specificity to be maintained even after multiple rounds of PCR, allowing reliable amplification at low annealing temperatures. PEG-nGO decreases the nonspecific annealing of single-stranded DNA (ssDNA), such as primer dimerization and false priming, by adsorbing excess primers. Moreover, PEG-nGO interrupts the reannealing of denatured template DNA by preferentially binding to ssDNA. Thus, PEG-nGO enhances the PCR specificity by preferentially binding to ssDNA without inhibiting DNA polymerase, which is analogous to the role of ssDNA binding proteins.
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Affiliation(s)
- Hyo Ryoung Kim
- Department of Bioscience and Biotechnology, Konkuk University Neundong-ro 120, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Ahruem Baek
- Department of Bioscience and Biotechnology, Konkuk University Neundong-ro 120, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Il Joon Lee
- Department of Bioscience and Biotechnology, Konkuk University Neundong-ro 120, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Dong-Eun Kim
- Department of Bioscience and Biotechnology, Konkuk University Neundong-ro 120, Gwangjin-gu, Seoul 05029, Republic of Korea
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16
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Oh EH, Jung S, Kim WJ, Kim KP, Kim SK. Microparticle-based RT-qPCR for highly selective rare mutation detection. Biosens Bioelectron 2016; 87:229-235. [PMID: 27566396 DOI: 10.1016/j.bios.2016.08.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/12/2016] [Accepted: 08/17/2016] [Indexed: 01/08/2023]
Abstract
The quantitative reverse transcription polymerase chain reaction (RT-qPCR) has become one of the most widely used methods in the detection of disease-specific RNAs. The RT-qPCR involves two separate steps, RT and qPCR. In this study, we suggest a new RT-qPCR protocol with the particles of primer-immobilized networks (PINs), performing capture, RT and amplification of a target RNA in one particle. The production of undesired cDNAs was dramatically suppressed by the specific capture of the target RNA within the particle. Afterward, RT and amplification processes are performed without loss of cDNAs as exchanging the reaction solution. The biomarker gene of chronic myeloid leukemia, Bcr-Abl fusion transcript, is detected in the sensitivity of single mutant leukemic cell mixed in 104 normal cell using this protocol with the excellent restraint of non-specific signal. This protocol that whole processes are performed in the particle in a row is preferred for the highly specific detection of target RNAs in complex sample.
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Affiliation(s)
- Eun Hae Oh
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Seungwon Jung
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Won Jin Kim
- Department of Applied Chemistry, The Institute of Natural Science, College of Applied Science, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Kwang Pyo Kim
- Department of Applied Chemistry, The Institute of Natural Science, College of Applied Science, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Sang Kyung Kim
- Center for BioMicrosystems, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; Department of Biomedical Engineering, Korea University of Science and Technology, Daejeon 34113, Republic of Korea.
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17
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Wang D, Yuan Y, Zheng Y, Chai Y, Yuan R. An electrochemical peptide cleavage-based biosensor for matrix metalloproteinase-2 detection with exonuclease III-assisted cycling signal amplification. Chem Commun (Camb) 2016; 52:5943-5. [PMID: 27054357 DOI: 10.1039/c6cc00928j] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this work, an electrochemical peptide biosensor was developed for matrix metalloproteinase-2 (MMP-2) detection by conversion of a peptide cleavage event into DNA detection with exonuclease III (Exo III)-assisted cycling signal amplification.
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Affiliation(s)
- Ding Wang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China.
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18
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Hong C, Baek A, Hah SS, Jung W, Kim DE. Fluorometric Detection of MicroRNA Using Isothermal Gene Amplification and Graphene Oxide. Anal Chem 2016; 88:2999-3003. [DOI: 10.1021/acs.analchem.6b00046] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Chaesun Hong
- Department
of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea
| | - Ahruem Baek
- Department
of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea
| | | | | | - Dong-Eun Kim
- Department
of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea
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19
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A label-free fluorescent probe based on DNA-templated silver nanoclusters and exonuclease III-assisted recycling amplification detection of nucleic acid. Anal Chim Acta 2015; 900:90-6. [DOI: 10.1016/j.aca.2015.10.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 10/01/2015] [Accepted: 10/16/2015] [Indexed: 11/20/2022]
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