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Li L, Gopinath SC, Lakshmipriya T, Subramaniam S, Anbu P. Zeolite-iron oxide integrated interdigitated electrode sensor for diagnosing cervical cancer. Heliyon 2024; 10:e31851. [PMID: 38845893 PMCID: PMC11154609 DOI: 10.1016/j.heliyon.2024.e31851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 05/22/2024] [Accepted: 05/22/2024] [Indexed: 06/09/2024] Open
Abstract
Cervical cancer is caused by changes in the cervix that lead to precancerous cells and eventually progress to cancer. Human papillomavirus (HPV) infections are the primary cause of cervical cancer. Early detection of HPV is crucial in preventing cervical cancer, and regular screening for HPV infection can identify cell changes before they develop into cancer. While Pap smear tests are reliable for cervical cancer screening, they are critical, expensive, and labor-intensive. Therefore, researchers are focusing on identifying blood-based biomarkers using biosensors for cervical cancer screening. HPV strains 16, 45, and 18 are common culprits in cervical cancer. This study aimed to develop an HPV-16 DNA biosensor on a zeolite-iron oxide (zeolite-IO) modified interdigitated electrode (IDE) sensor. The DNA probe was immobilized on the IDE through amine-modified zeolite-IO, enhancing the hybridization of the target and DNA probe. The detection limit of the DNA-DNA duplex was found to be 7.5 pM with an R2 value of 0.9868. Additionally, control experiments with single and triple mismatched sequences showed no increase in current responses, and the identification of target DNA in a serum-spiked sample indicated specific and selective target identification.
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Affiliation(s)
- Ling Li
- Obstetrics and Gynecology, Xi'an Forth Hospital, Xi'an, 710004, China
| | - Subash C.B. Gopinath
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), 02600, Arau, Perlis, Malaysia
- Institute of Nano Electronic Engineering, Universiti Malaysia Perlis (UniMAP), 01000, Kangar, Perlis, Malaysia
- Micro System Technology, Centre of Excellence (CoE), Universiti Malaysia Perlis (UniMAP), Pauh Campus, 02600, Arau, Perlis, Malaysia
- Centre for Chemical Biology, Universiti Sains Malaysia, Bayan Lepas, 11900, Penang, Malaysia
- Center for Global Health Research, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - Thangavel Lakshmipriya
- Center for Global Health Research, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - Sreeramanan Subramaniam
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), 02600, Arau, Perlis, Malaysia
- Institute of Nano Electronic Engineering, Universiti Malaysia Perlis (UniMAP), 01000, Kangar, Perlis, Malaysia
- Centre for Chemical Biology, Universiti Sains Malaysia, Bayan Lepas, 11900, Penang, Malaysia
- School of Biological Sciences, Universiti Sains Malaysia, Georgetown, 11800, Penang, Malaysia
- Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya, 60115, Indonesia
| | - Periasamy Anbu
- Center for Global Health Research, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602 105, Tamil Nadu, India
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2
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Nakowong P, Chatchawal P, Chaibun T, Boonapatcharoen N, Promptmas C, Buajeeb W, Lee SY, Jearanaikoon P, Lertanantawong B. Detection of high-risk HPV 16 genotypes in cervical cancers using isothermal DNA amplification with electrochemical genosensor. Talanta 2024; 269:125495. [PMID: 38043336 DOI: 10.1016/j.talanta.2023.125495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/23/2023] [Accepted: 11/25/2023] [Indexed: 12/05/2023]
Abstract
Cervical cancer emerges as the third most prevalent types of malignancy among women on a global scale. Cervical cancer is significantly associated with the persistent infection of human papillomavirus (HPV) type 16. The process of diagnosing is crucial in order to prevent the progression of a condition into a malignant state. The early detection of cervical cancer through initial stage screening is of the utmost significance in both the prevention and effective management of this disease. The present detection methodology is dependent on quantitative polymerase chain reaction (qPCR), which necessitates the use of a costly heat cycler instrument. In this study, we report the development of an electrochemical DNA biosensor integrated with an isothermal recombinase polymerase amplification (RPA) reaction for the detection and identification of the high-risk HPV-16 genotype. The electrochemical biosensor exhibited a high degree of specificity and sensitivity, as evidenced by its limit of detection (LOD) of 0.23 copies/μL of HPV-16 DNA. The validity of this electrochemical platform was confirmed through the analysis of 40 cervical tissues samples, and the findings were consistent with those obtained through polymerase chain reaction (PCR) testing. Our straightforward electrochemical detection technology and quick turnaround time at 75 min make the assay suitable for point-of-care testing in low-resource settings.
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Affiliation(s)
- Panisara Nakowong
- Biosensors Laboratory, Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Patutong Chatchawal
- Center of Research and Development of Medical Diagnosis Laboratories, Faculty of Associated Medical Sciences, KhonKaen University, KhonKaen, 40002, Thailand; Center for Innovation and Standard for Medical Technology and Physical Therapy (CISMaP), KhonKaen University, KhonKaen, 40002, Thailand
| | - Thanyarat Chaibun
- Biosensors Laboratory, Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Nimaradee Boonapatcharoen
- Pilot Plant Development and Training Institute (PDTI), King Mongkut's University of Technology Thonburi, Bangkok, 10150, Thailand
| | - Chamras Promptmas
- Biosensors Laboratory, Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Waranun Buajeeb
- Department of Oral Medicine and Periodontology, Faculty of Dentistry, Mahidol University, Bangkok, 10400, Thailand
| | - Su Yin Lee
- Faculty of Applied Sciences, AIMST University, 08100, Semeling, Kedah, Malaysia; Centre of Excellence for Omics-Driven Computational Biodiscovery (ComBio), AIMST University, Bedong, 08100, Malaysia
| | - Patcharee Jearanaikoon
- Center of Research and Development of Medical Diagnosis Laboratories, Faculty of Associated Medical Sciences, KhonKaen University, KhonKaen, 40002, Thailand; Center for Innovation and Standard for Medical Technology and Physical Therapy (CISMaP), KhonKaen University, KhonKaen, 40002, Thailand
| | - Benchaporn Lertanantawong
- Biosensors Laboratory, Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, 73170, Thailand.
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3
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Peteni S, Ozoemena OC, Khawula T, Haruna AB, Rawson FJ, Shai LJ, Ola O, Ozoemena KI. Electrochemical Immunosensor for Ultra-Low Detection of Human Papillomavirus Biomarker for Cervical Cancer. ACS Sens 2023. [PMID: 37384904 PMCID: PMC10391710 DOI: 10.1021/acssensors.3c00677] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
Human papillomavirus (HPV) is the causative agent for cervical cancer. Of the various types of HPV, the high-risk HPV-16 type is the most important antigenic high-risk HPV. In this work, the antigenic HPV-16 L1 peptide was immobilized on a glassy carbon electrode and used to detect several concentrations of the anti-HPV-16 L1 antibody, and vice versa. Two electrode platforms were used: onion-like carbon (OLC) and its polyacrylonitrile (OLC-PAN) composites. Both platforms gave a wide linear concentration range (1.95 fg/mL to 6.25 ng/mL), excellent sensitivity (>5.2 μA/log ([HPV-16 L1, fg/mL]), and extra-ordinarily low limit of detection (LoD) of 1.83 fg/mL (32.7 aM) and 0.61 fg/mL (10.9 aM) for OLC-PAN and OLC-based immunosensors, respectively. OLC-PAN modified with the HPV-16 L1 protein showed low LoD for the HPV-16 L1 antibody (2.54 fg/mL, i.e., 45.36 aM), proving its potential use for screening purposes. The specificity of detection was proven with the anti-ovalbumin antibody (anti-OVA) and native ovalbumin protein (OVA). An immobilized antigenic HPV-16 L1 peptide showed insignificant interaction with anti-OVA in contrast with the excellent interaction with anti-HPV-16 L1 antibody, thus proving high specificity. The application of the immunosensor as a potential point-of-care (PoC) diagnostic device was investigated with screen-printed carbon electrodes, which detected ultra-low (ca. 0.7 fg/mL ≈ 12.5 aM) and high (ca. 12 μg/mL ≈ 0.21 μM) concentrations. This study represents the lowest LoD reported for HPV-16 L1. It opens the door for further investigation with other electrode platforms and realization of PoC diagnostic devices for screening and testing of HPV biomarkers for cervical cancer.
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Affiliation(s)
- Siwaphiwe Peteni
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Okoroike C Ozoemena
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Tobile Khawula
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Aderemi B Haruna
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Frankie J Rawson
- School of Pharmacy, Biodiscovery Institute University of Nottingham, Nottingham NG7 2RD, U.K
| | - Leshweni J Shai
- Department of Biomedical Sciences, Tshwane University of Technology, Pretoria 0001, South Africa
| | - Oluwafunmilola Ola
- Advanced Materials Group, Faculty of Engineering, The University of Nottingham, Nottingham NG7 2RD, U.K
| | - Kenneth I Ozoemena
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
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4
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Ozcelikay G, Gamella M, Solís-Fernández G, Barderas R, Pingarrón JM, Campuzano S, Ozkan SA. Electrochemical bioplatform for the determination of the most common and carcinogenic human papillomavirus DNA. J Pharm Biomed Anal 2023; 231:115411. [PMID: 37094410 DOI: 10.1016/j.jpba.2023.115411] [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: 03/20/2023] [Revised: 04/18/2023] [Accepted: 04/18/2023] [Indexed: 04/26/2023]
Abstract
Nucleic acid-based analytical bioplatforms have gained importance as diagnostic tests for genomics and as early detection tools for diseases such as cancer. In this context, we report the development of an amperometric bioplatform for the determination of a specific human papillomavirus type 16 (HPV16) sequence. The bioplatform utilizes an immune-nucleic acid hybrid-sandwich assay. A biotinylated RNA capture probe (RNAbCp), complementary to the selected HPV16 target DNA sequence, was immobilised on the surface of streptavidin coated magnetic microbeads (Strep-MBs). The RNA/DNA heteroduplex resulting from the hybridization of the RNAbCP and the HPV16 target sequence was recognised by a commercial antibody that specifically bound to the heteroduplex (AbDNA-RNA). A horseradish-peroxide labeled secondary antibody (antiIgG-HRP) was used for the detection of AbDNA-RNA. Relying on amperometric detection of the resulting HRP-labeled magnetic bioconjugates captured on screen-printed electrodes (SPCEs) in the presence of H2O2 and hydroquinone (HQ), the biotool achieved a low limit of detection (0.5 pM) for the synthetic HPV16 target DNA. In addition, the developed bioplatform was able to discriminate between HPV16 positive and negative human cancer cells using only 25 ng of amplified DNA in a test time of 45 min.
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Affiliation(s)
- Göksu Ozcelikay
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06560 Ankara, Turkey; Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain
| | - Maria Gamella
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain
| | | | - Rodrigo Barderas
- Chronic Disease Programme, UFIEC, Institute of Health Carlos III, Majadahonda, 28220 Madrid, Spain
| | - José M Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain
| | - Susana Campuzano
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Sibel A Ozkan
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06560 Ankara, Turkey.
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5
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Pareek S, Jain U, Bharadwaj M, Saxena K, Roy S, Chauhan N. An ultrasensitive electrochemical DNA biosensor for monitoring Human papillomavirus-16 (HPV-16) using graphene oxide/Ag/Au nano-biohybrids. Anal Biochem 2023; 663:115015. [PMID: 36496002 DOI: 10.1016/j.ab.2022.115015] [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: 06/16/2022] [Revised: 12/02/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022]
Abstract
A DNA-based electrochemical biosensor has been developed herein for the detection of Human papillomavirus-16 (HPV-16). HPV-16 is a double-stranded, non-enveloped, epitheliotropic DNA virus which responsible for cervical cancer. In this proposed biosensor, an indium tin oxide (ITO) coated glass electrode was modified for sensing HPV-16 using graphene oxide and silver coated gold nanoparticles. Subsequently, HPV-16 specific DNA probes were immobilized on a modified ITO surface. The synthesized nanocomposites were characterized by FE-SEM and UV-VIS spectroscopy techniques. Electrochemical characterization was performed by using cyclic voltammetry and electrochemical Impedance Spectroscopy methods. The hybridization between the probe and target DNA was analyzed by a reduction in current, mediated by methylene blue. The biosensor showed a qualitative inequity between the probe and target HPV-16 DNA. The developed biosensor showed high sensitivity as 0.54 mA/aM for the detection of HPV-16. In a linear range of 100 aM to 1 μM with 100 aM LOD, the proposed biosensor exhibited excellent performance with the rapid diagnosis. Thus, the results indicate that the developed HPV DNA biosensor shows good consistency with the present approaches and opens new opportunities for developing point-of-care devices. The diagnosis of HPV-16 infection in its early stage may also be possible with this detection system.
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Affiliation(s)
- Sakshi Pareek
- Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Sector-125, Noida, 201313, India
| | - Utkarsh Jain
- School of Health Sciences & Technology (SoHST), University of Petroleum and Energy Studies (UPES), Bidholi, Dehradun, 248007, India
| | - Mausumi Bharadwaj
- National Institute of Cancer Prevention & Research, Indian Council of Medical Research (ICMR), 201301, India
| | - Kirti Saxena
- Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Sector-125, Noida, 201313, India
| | - Souradeep Roy
- Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Sector-125, Noida, 201313, India; Centre for Interdisciplinary Research and Innovation (CIDRI), University of Petroleum and Energy Studies (UPES), Dehradun, India
| | - Nidhi Chauhan
- School of Health Sciences & Technology (SoHST), University of Petroleum and Energy Studies (UPES), Bidholi, Dehradun, 248007, India.
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6
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Rawat R, Roy S, Goswami T, Mathur A. An Electroanalytical Flexible Biosensor Based on Reduced Graphene Oxide-DNA Hybrids for the Early Detection of Human Papillomavirus-16. Diagnostics (Basel) 2022; 12:diagnostics12092087. [PMID: 36140489 PMCID: PMC9498135 DOI: 10.3390/diagnostics12092087] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/18/2022] [Accepted: 08/26/2022] [Indexed: 01/10/2023] Open
Abstract
Human Papilloma Virus 16 (HPV 16) is the well-known causative species responsible for triggering cervical cancer. When left undiagnosed and untreated, this disease leads to life-threatening events among the female populace, especially in developing nations where healthcare resources are already being stretched to their limits. Considering various drawbacks of conventional techniques for diagnosing this highly malignant cancer, it becomes imperative to develop miniaturized biosensing platforms which can aid in early detection of cervical cancer for enhanced patient outcomes. The current study reports on the development of an electrochemical biosensor based on reduced graphene oxide (rGO)/DNA hybrid modified flexible carbon screen-printed electrode (CSPE) for the detection of HPV 16. The carbon-coated SPEs were initially coated with rGO followed by probe DNA (PDNA) immobilization. The nanostructure characterization was performed using UV-Vis spectroscopy, Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy and X-ray diffraction (XRD) techniques. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were employed to study the electrochemical characterization of the nano-biohybrid sensor surface. The optimization studies and analytical performance were assessed using differential pulse voltammetry (DPV), eventually exhibiting a limit of detection (LoD) ~2 pM. The developed sensor was found to be selective solely to HPV 16 target DNA and exhibited a shelf life of 1 month. The performance of the developed flexible sensor further exhibited a promising response in spiked serum samples, which validates its application in future point-of-care scenarios.
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Affiliation(s)
- Reema Rawat
- Department of Allied Sciences, School of Health Sciences and Technology, University of Petroleum and Energy Studies, Dehradun 248007, India
| | - Souradeep Roy
- Centre for Interdisciplinary Research and Innovation (CIDRI), University of Petroleum and Energy Studies, Dehradun 248007, India
| | - Tapas Goswami
- Department of Chemistry, School of Engineering, University of Petroleum and Energy Studies, Dehradun 248007, India
- Correspondence: (T.G.); (A.M.)
| | - Ashish Mathur
- Centre for Interdisciplinary Research and Innovation (CIDRI), University of Petroleum and Energy Studies, Dehradun 248007, India
- Department of Physics, School of Engineering, University of Petroleum and Energy Studies, Dehradun 248007, India
- Correspondence: (T.G.); (A.M.)
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7
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Ghaleh HEG, Shahriary A, Izadi M, Farzanehpour M. Advances in early diagnosis of cervical cancer based on biosensors. Biotechnol Bioeng 2022; 119:2305-2312. [DOI: 10.1002/bit.28149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 04/18/2022] [Accepted: 05/19/2022] [Indexed: 11/07/2022]
Affiliation(s)
| | - Alireza Shahriary
- Chemical Injuries Research Center, Systems biology and poisonings instituteBaqiyatallah University of Medical SciencesTehranIran
| | - Morteza Izadi
- Health Research CenterBaqiyatallah University of Medical SciencesTehranIran
| | - Mahdieh Farzanehpour
- Applied Virology Research CenterBaqiyatallah University of Medical sciencesTehranIran
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8
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Yoo H, Lee JY, Park KS, Oh SS. Lead-start isothermal polymerase amplification controlled by DNAzymatic switches. NANOSCALE 2022; 14:7828-7836. [PMID: 35583083 DOI: 10.1039/d1nr07894a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
As DNA polymerases are even active at ambient temperature, there is inevitable non-specific amplification; to avoid the undesired amplification of analytes, a heat activation-based polymerase chain reaction (PCR), called hot-start PCR, is widely used to be highly precise and quantitative in detection. Unlike thermocycling amplification, isothermal amplification, compatible for point-of-care (PoC) tests, cannot be benefited by the heat-activation technique, making the method qualitative rather than quantitative. In this work, we newly developed a lead ion (Pb2+) activation technique, called lead-start isothermal amplification, allowing on-demand activation or deactivation of DNA polymerases at room temperature. We systematically correlated the DNA polymerase inhibition by the TQ30 aptamer with Pb2+-responsive strand cleavage by the GR5 DNAzyme, and relying on the type of interconnectors, Pb2+ successfully served as an initiator or a terminator of isothermal DNA amplification. Our lead-start isothermal amplification was exceptionally Pb2+-specific, dramatically increasing the enzymatic activity of DNA polymerase (>25 times) only by Pb2+ introduction. Despite one-by-one sample preparation, a number of reactions can begin and end at the same time, sharing the identical amplification conditions, and thereby allowing their quantitative analysis and comparison. Using a portable UV lamp and a smartphone camera, we also succeeded in quantifying the amounts of clinically important and human papillomavirus type 16 genes in human serum and SARS-CoV-2's nucleocapsid genes in human serum and saliva, and the limit of detection was as low as 0.1 nM, highly applicable for actual PoC tests in the field with no purification process.
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Affiliation(s)
- Hyebin Yoo
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea.
| | - Ju Young Lee
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, South Korea
| | - Ki Soo Park
- Department of Biological Engineering, Konkuk University, Seoul, 05029, South Korea.
| | - Seung Soo Oh
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea.
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9
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The first diagnostic test for specific detection of Mycobacterium simiae using an electrochemical label-free DNA nanobiosensor. Talanta 2022; 238:123049. [PMID: 34801906 DOI: 10.1016/j.talanta.2021.123049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 10/06/2021] [Accepted: 11/06/2021] [Indexed: 01/08/2023]
Abstract
Mycobacterium simiae has been reported to be the most prevalent species of Nontuberculous mycobacteria (NTM) in many countries. As both phenotypic and molecular detection of M. simiae and other NTMs have limitations, finding an accurate, fast, and low-cost diagnostic method is critical for the management of infections. Here, we report the development of a new type of label-free electrochemical biosensor using a gold electrode decorated with l-cysteine/PAMAM dendrimer for specific targeting of M. simiae ITS sequence. DNA hybridization was monitored by measuring changes in the free guanine electrical signal with changing ssDNA target concentrations by differential pulse voltammetry (DPV) method. Response surface methodology (RSM) was applied for the optimization of variables affecting biosensor response. Under optimal conditions, the biosensor revealed a wide linear range from 10-14 M to 10-6 M and a detection limit of 1.40 fM. The fabricated biosensor showed an excellent selectivity to M. simiae in the presence of other similar pathogenic bacteria. Moreover, experimental results confirmed that this biosensor exhibited great precision and high reproducibility, hence provides a low-cost, label-free, and faster detection analysis, representing a novel strategy in detecting other NTMs.
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10
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Mumcu MU, Ertuğrul Uygun HD, Uygun ZO. Human Papilloma Virus‐11 DNA Detection by Graphene‐PAMAM Modified Impedimetric CRISPR‐dCas9 Biosensor. ELECTROANAL 2021. [DOI: 10.1002/elan.202100536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Hilmiye Deniz Ertuğrul Uygun
- Dokuz Eylül University Center for Fabrication and Application of Electronic Materials, Tınaztepe, Buca 35390 İzmir Turkey
| | - Zihni Onur Uygun
- Kafkas University Faculty of Medicine, Department of Medical Biochemistry 36100 Kars Turkey
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