1
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Tang Y, Wu Y, Wang S, Lu X, Gu X, Li Y, Yang F, Xu R, Wang T, Jiao Z, Wu Y, Liu L, Chen JQ, Wang Q, Chen Q. An integrative platform for detection of RNA 2'-O-methylation reveals its broad distribution on mRNA. CELL REPORTS METHODS 2024; 4:100721. [PMID: 38452769 PMCID: PMC10985248 DOI: 10.1016/j.crmeth.2024.100721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 08/29/2023] [Accepted: 02/13/2024] [Indexed: 03/09/2024]
Abstract
Ribose 2'-O-methylation is involved in critical biological processes, but its biological functions and significance in mRNAs remain underexplored. We have developed NJU-seq, a sensitive method for unbiased 2'-O-methylation (Nm) profiling, and Nm-VAQ, a site-specific quantification tool. Using these tools in tandem, we identified thousands of Nm sites on mRNAs of human and mouse cell lines, of which 68 of 84 selected sites were further validated to be more than 1% 2'-O-methylated. Unlike rRNA, most mRNA Nm sites were from 1% to 30% methylated. In addition, mRNA Nm was dynamic, changing according to the circumstance. Furthermore, we show that fibrillarin is involved as a methyltransferase. By mimicking the detected Nm sites and the context sequence, the RNA fragments could be 2'-O-methylated and demonstrated higher stability but lower translation efficiency. Last, profiling of Nm sites in lung surgery samples revealed common signatures of lung cancer pathogenesis, providing potential new diagnostic markers.
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Affiliation(s)
- Yao Tang
- Department of Thoracic Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu 210093, China; The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China; Cancer Center, Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Yifan Wu
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Sainan Wang
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Xiaolan Lu
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China; Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Xiangwen Gu
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Yong Li
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Fan Yang
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Ruilin Xu
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Tao Wang
- Department of Thoracic Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Zichen Jiao
- Department of Thoracic Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu 210093, China; The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Yan Wu
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Liwei Liu
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Jian-Qun Chen
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China.
| | - Qiang Wang
- The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210023, China.
| | - Qihan Chen
- Cancer Center, Faculty of Health Sciences, University of Macau, Macau SAR, China; MOE Frontiers Science Center for Precision Oncology, University of Macau, Macau SAR, China.
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2
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Anthi J, Vaněčková E, Spasovová M, Houska M, Vrabcová M, Vogelová E, Holubová B, Vaisocherová-Lísalová H, Kolivoška V. Probing charge transfer through antifouling polymer brushes by electrochemical methods: The impact of supporting self-assembled monolayer chain length. Anal Chim Acta 2023; 1276:341640. [PMID: 37573118 DOI: 10.1016/j.aca.2023.341640] [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: 04/06/2023] [Revised: 07/10/2023] [Accepted: 07/17/2023] [Indexed: 08/14/2023]
Abstract
Ultrathin surface-tethered polymer brushes represent attractive platforms for a wide range of sensing applications in strategically vital areas such as medicine, forensics, or security. The recent trends in such developments towards "real world conditions" highlighted the role of zwitterionic poly(carboxybetaine) (pCB) brushes which provide excellent antifouling properties combined with bio-functionalization capacity. Highly dense pCB brushes are usually prepared by the "grafting from" polymerization triggered by initiators on self-assembled monolayers (SAMs). Here, multi-methodological experimental studies are pursued to elucidate the impact of the alkanethiolate SAM chain length (C6, C8 and C11) on structural and functional properties of antifouling poly(carboxybetaine methacrylamide) (pCBMAA) brush. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in a custom-made 3D printed cell employing [Ru(NH3)6]3+/2+ redox probe were used to investigate penetrability of SAM/pCBMAA bilayers for small molecules and interfacial charge transfer characteristics. The biofouling resistance of pCBMAA brushes was characterized by surface plasmon resonance; ellipsometry and FT-IRRAS spectroscopy were used to determine swelling and relative density of the brushes synthesized from initiator-bearing SAMs with varied carbon chain length. The SAM length was found to have a substantial impact on all studied characteristics; the highest value of charge transfer resistance (Rct) was observed for denser pCBMAA on longer-chain (C11) SAM when compared to shorter (C8/C6) SAMs. The observed high value of Rct for C11 implies a limitation for the analytical performance of electrochemical sensing methods. At the same time, the pCBMAA brushes on C11 SAM exhibited the best bio-fouling resistance among inspected systems. This demonstrates that proper selection of supporting structures for brushes is critical in the design of these assemblies for biosensing applications.
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Affiliation(s)
- Judita Anthi
- FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 00, Prague, Czech Republic; Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 166 28, Prague, Czech Republic
| | - Eva Vaněčková
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 182 23, Prague, Czech Republic
| | - Monika Spasovová
- FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 00, Prague, Czech Republic
| | - Milan Houska
- FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 00, Prague, Czech Republic
| | - Markéta Vrabcová
- FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 00, Prague, Czech Republic
| | - Eva Vogelová
- FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 00, Prague, Czech Republic
| | - Barbora Holubová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 166 28, Prague, Czech Republic
| | - Hana Vaisocherová-Lísalová
- FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 00, Prague, Czech Republic.
| | - Viliam Kolivoška
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 182 23, Prague, Czech Republic.
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3
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Altay DN, Yagar H, Ozcan HM. A new ITO-based Aβ 42 biosensor for early detection of Alzheimer's disease. Bioelectrochemistry 2023; 153:108501. [PMID: 37421689 DOI: 10.1016/j.bioelechem.2023.108501] [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: 04/13/2023] [Revised: 06/27/2023] [Accepted: 07/02/2023] [Indexed: 07/10/2023]
Abstract
In this study, a novel label-free impedimetric immunosensor was fabricated for rapid, selective, and sensitive quantitative analysis of Aβ42 protein for use in the diagnosis of Alzheimer's disease. The immunosensor was fabricated using inexpensive and disposable indium tin oxide polyethylene terephthalate (ITO-PET) electrodes. After the electrodes were modified with 3-glycidoxypropyldimethoxymethylsilane (GPDMMS), the antibody specific to the Aβ42 protein (anti-Aβ42) was immobilized. The affinity interaction between anti-Aβ42 and Aβ42 in the immobilization steps in immunosensor fabrication and in the quantitation of Aβ42 were analyzed using Electrochemical Impedance Spectroscopy (EIS) and Cyclic Voltammetry (CV) techniques. Additionally, the morphological changes occurring on the electrode surface during each immobilization step were imaged using scanning electron microscopy (SEM). The linear detection range of the immunosensor was determined as 1-100 pg/mL with the limit of detection value of 0.37 pg/mL. Analytical properties of the biosensor, including reproducibility, repeatability, storage stability, selectivity, and regeneration were investigated. The kinetic behavior of antibody-antigen complex formation was determined for the first time using single frequency impedance (SFI) analysis on an Aβ42 biosensor. The potential for use of the immunosensor in clinical studies was demonstrated by analysis of Aβ42 in commercially purchased human serum.
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Affiliation(s)
- Dilek Nur Altay
- Institute of Natural and Applied Sciences, Trakya University, Edirne, Turkey.
| | - Hulya Yagar
- Department of Chemistry, Faculty of Science, Trakya University, Edirne, Turkey.
| | - Hakki Mevlut Ozcan
- Department of Chemistry, Faculty of Science, Trakya University, Edirne, Turkey.
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4
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Yadav AK, Verma D, Kumar A, Bhatt AN, Solanki PR. Biocompatible epoxysilane substituted polymer-based nano biosensing platform for label-free detection of cancer biomarker SP17 in patient serum samples. Int J Biol Macromol 2023; 239:124325. [PMID: 37054852 DOI: 10.1016/j.ijbiomac.2023.124325] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/30/2023] [Accepted: 03/31/2023] [Indexed: 04/15/2023]
Abstract
Herein, we report the results of the studies relating to developing a simple, sensitive, cost-effective, and disposable electrochemical-based label-free immunosensor for real-time detection of a new cancer biomarker, sperm protein-17 (SP17), in complex serum samples. An indium tin oxide (ITO) coated glass substrate modified with self-assembled monolayers (SAMs) of 3-glycidoxypropyltrimethoxysilane (GPTMS) was functionalized via covalent immobilization of monoclonal anti-SP17 antibodies using EDC(1-(3-(dimethylamine)-propyl)-3-ethylcarbodiimide hydrochloride) - NHS (N-hydroxy succinimide) chemistry. The developed immunosensor platform (BSA/anti-SP17/GPTMS@SAMs/ITO) was characterized via scanning electron microscopy (SEM), atomic force microscopy (AFM), contact angle (CA), Fourier transform infrared (FT-IR) spectroscopic, and electrochemical techniques such as cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS) techniques. The fabricated BSA/anti-SP17/GPTMS@SAMs/ITO immunoelectrode platform was used to measure changes in the magnitude of the current of the electrodes through an electrochemical CV and DPV technique. A calibration curve between current and SP17 concentrations exhibited a broad linear detection range of (100-6000 & 50-5500 pg mL-1), with enhanced sensitivity (0.047 & 0.024 μA pg mL-1 cm-2), limit of detection (LOD) and limit of quantification (LOQ) of 47.57 & 142.9 pg mL-1 and 158.58 & 476.3 pg mL-1, by CV and DPV technique, respectively with a rapid response time of 15 min. It possessed exceptional repeatability, outstanding reproducibility, five-time reusability, and high stability. The biosensor's performance was evaluated in human serum samples, giving satisfactory findings obtained via the commercially available enzyme-linked immunosorbent assay (ELISA) technique, proving the clinical applicability for early diagnosis of cancer patients. Moreover, various in vitro studies in murine fibroblast cell line L929 have been performed to assess the cytotoxicity of GPTMS. The results demonstrated that GPTMS has excellent biocompatibility and can be used for biosensor fabrication.
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Affiliation(s)
- Amit K Yadav
- Special Center for Nanoscience, Jawaharlal Nehru University, New Delhi 110067, India
| | - Damini Verma
- Special Center for Nanoscience, Jawaharlal Nehru University, New Delhi 110067, India
| | - Abhishek Kumar
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, New Delhi, India
| | - Anant Narayan Bhatt
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, New Delhi, India
| | - Pratima R Solanki
- Special Center for Nanoscience, Jawaharlal Nehru University, New Delhi 110067, India.
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5
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Aydın EB, Aydın M, Sezgintürk MK. Biosensors for saliva biomarkers. Adv Clin Chem 2023; 113:1-41. [PMID: 36858644 DOI: 10.1016/bs.acc.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The analysis of salivary biomarkers has gained interest and is advantageous for simple, safe, and non-invasive testing in diagnosis as well as treatment. This chapter explores the importance of saliva biomarkers and summarizes recent advances in biosensor fabrication. The identification of diagnostic, prognostic and therapeutic markers in this matrix enables more rapid and frequent testing when combined with the use of biosensor technology. Challenges and future goals are highlighted and examined.
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Affiliation(s)
- Elif Burcu Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey.
| | - Muhammet Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Mustafa Kemal Sezgintürk
- Bioengineering Department, Faculty of Engineering, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
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6
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Recent Trends in the Development of Polyphosphazenes for Bio-applications. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2022. [DOI: 10.1007/s40883-022-00278-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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7
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Aydın EB, Aydın M, Sezgintürk MK. Impedimetric Detection of Calreticulin by a Disposable Immunosensor Modified with a Single-Walled Carbon Nanotube-Conducting Polymer Nanocomposite. ACS Biomater Sci Eng 2022; 8:3773-3784. [PMID: 35920068 DOI: 10.1021/acsbiomaterials.2c00499] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A label-free impedimetric immunosensing system was constructed for ultrasensitive determination of the calreticulin (CALR) biological marker in human serum samples utilizing an electrochemical impedance spectroscopy analysis technique for the first time. The new biosensor fabrication procedure consisted of electrodeposition of single-walled carbon nanotubes (SWCNTs) incorporating polymerization of an oxiran-2-yl methyl 3-(1H-pyrrol-1-yl) propanoate monomer (Pepx) onto a low-cost and disposable indium tin oxide (ITO) electrode. The SWCNTs-PPepx nanocomposite layer was prepared onto the ITO after the one-step fabrication procedure. The fabrication procedure of the immunosensor and the characteristic biomolecular interactions between the anti-CALR and CALR were characterized by electrochemical analysis and morphological monitoring techniques. Under optimum conditions, the proposed biosensor was responsive to CALR concentrations over the detection ranges of 0.015-60 pg/mL linearly, and it had a very low detection limit (4.6 fg/mL) and a favorable sensitivity (0.43 kΩ pg-1 mL cm-2). The reliability of the biosensor system in clinical analysis was investigated by successful quantification of CALR levels in human serum. Moreover, the repeatability and reproducibility results of the biosensor were evaluated by using Dixon, Grubbs, T-test, and F-tests. Consequently, the proposed biosensor was a promising method for scientific, rapid, and successful analysis of CALR in human serum samples.
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Affiliation(s)
- Elif Burcu Aydın
- Scientific and Technological Research Center, Tekirdağ Namık Kemal University, Campus Street, Tekirdağ 59030, Turkey
| | - Muhammet Aydın
- Scientific and Technological Research Center, Tekirdağ Namık Kemal University, Campus Street, Tekirdağ 59030, Turkey
| | - Mustafa Kemal Sezgintürk
- Faculty of Engineering, Bioengineering Department, Çanakkale Onsekiz Mart University, Çanakkale 17100, Turkey
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8
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Subash A, Basanth A, Kandasubramanian B. Biodegradable polyphosphazene – hydroxyapatite composites for bone tissue engineering. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2082426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Alsha Subash
- Department of Metallurgical and Materials Engineering, Nano Surface Texturing Laboratory, Defence Institute of Advanced Technology (DU), Ministry of Defence, Pune, Maharashtra, India
| | - Abina Basanth
- Biopolymer Science, CIPET: Institute of Plastics Technology (IPT), Kochi, India
| | - Balasubramanian Kandasubramanian
- Department of Metallurgical and Materials Engineering, Nano Surface Texturing Laboratory, Defence Institute of Advanced Technology (DU), Ministry of Defence, Pune, Maharashtra, India
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9
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Nadri S, Habib Kazemi S, Nazari L. A novel electrochemical biosensor based on the electrospun nanofibrous nanocomposites of PCL-PPy-MWCNT towards determination of TNF-α biomarker. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05179-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Fabrication of alkoxysilane substituted polymer-modified disposable biosensing platform: Toward sperm protein 17 sensing as a new cancer biomarker. Talanta 2022; 243:123376. [DOI: 10.1016/j.talanta.2022.123376] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 01/31/2022] [Accepted: 03/08/2022] [Indexed: 12/24/2022]
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11
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Aydın EB, Aydın M, Sezgintürk MK. Label-free and reagent-less electrochemical detection of nucleocapsid protein of SARS-CoV-2: an ultrasensitive and disposable biosensor. NEW J CHEM 2022. [DOI: 10.1039/d2nj00046f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
SARS-CoV-2 biosensor fabrication steps.
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Affiliation(s)
- Elif Burcu Aydın
- Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Muhammet Aydın
- Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey
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12
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Anthi J, Kolivoška V, Holubová B, Vaisocherová-Lísalová H. Probing polymer brushes with electrochemical impedance spectroscopy: a mini review. Biomater Sci 2021; 9:7379-7391. [PMID: 34693954 DOI: 10.1039/d1bm01330k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Polymer brushes are frequently used as surface-tethered antifouling layers in biosensors to improve sensor surface-analyte recognition in the presence of abundant non-target molecules in complex biological samples by suppressing nonspecific interactions. However, because brushes are complex systems highly responsive to changes in their surrounding environment, studying their properties remains a challenge. Electrochemical impedance spectroscopy (EIS) is an emerging method in this context. In this mini review, we aim to elucidate the potential of EIS for investigating the physicochemical properties and structural aspects of polymer brushes. The application of EIS in brush-based biosensors is also discussed. Most common principles employed in these biosensors are presented, as well as interpretation of EIS data obtained in such setups. Overall, we demonstrate that the EIS-polymer brush pairing has a considerable potential for providing new insights into brush functionalities and designing highly sensitive and specific biosensors.
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Affiliation(s)
- Judita Anthi
- Institute of Physics of the CAS, Na Slovance 2, 182 21 Prague, Czech Republic. .,Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 16628 Prague, Czech Republic
| | - Viliam Kolivoška
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic.
| | - Barbora Holubová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 16628 Prague, Czech Republic
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Aydın EB, Aydın M, Sezgintürk MK. Highly selective and sensitive sandwich immunosensor platform modified with MUA-capped GNPs for detection of spike Receptor Binding Domain protein: A precious marker of COVID 19 infection. SENSORS AND ACTUATORS. B, CHEMICAL 2021; 345:130355. [PMID: 34188361 PMCID: PMC8225300 DOI: 10.1016/j.snb.2021.130355] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 06/07/2021] [Accepted: 06/22/2021] [Indexed: 05/10/2023]
Abstract
A label-free electrochemical biosensing system as a suitable analysis technique for COVID 19 specific spike receptor-binding domain protein (RBD) was developed with an aim to facilitate the diagnosis of coronavirus. A novel production procedure for the fabrication of gold nanoparticles (GNPs)-capped 11-mercaptoundecanoic acid (MUA) modified bioelectrode was presented and its application potential for RBD biosensing was examined. The bioelectrode fabrication protocol was based on covalent ester linking formation between hydroxylated ITO electrode and GNPs-capped MUA (GNPs@MUA) with carboxyl ends. For this aim, spherical GNPs were prepared and characterized with scanning-transmission electron microscopy (S-TEM), UV-vis, and Raman spectroscopy. The synthesized GNPs were functionalized with MUA yielding Au-S bonds. Then, covalent immobilization of anti-RBD antibodies on the GNPs@MUA was performed with the help of carbodiimide coupling chemistry. The assembly processes of GNPs@MUA, anti-RBD antibodies and RBD antigens were characterized electrochemical, chemical and morphological techniques. GNPs@MUA was used as immobilization environment and provided the most effective surface design for target immunosensor. The resulting immunosensor is further applied to the impedimetric detection of RBD and it displayed a linear response to RBD antigen in the linear range of 0.002-100 pg mL-1 with a limit of detection of 0.577 fg mL-1 and sensitivity of 0.238 kohmpgmL-1 cm-2. The fabricated immunosensor had a good repeatability, long storage, stability and a reusable property after simple regeneration process. Furthermore, it was successfully employed for selective determination of RBD in artificial nasal secretion samples.
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Affiliation(s)
- Elif Burcu Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Muhammet Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey
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14
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Aydın EB, Aydın M, Sezgintürk MK. Ultrasensitive and Selective Impedimetric Determination of Prostate Specific Membrane Antigen Based on Di-Succinimide Functionalized Polythiophene Covered Cost-Effective Indium Tin Oxide. Macromol Biosci 2021; 21:e2100173. [PMID: 34263542 DOI: 10.1002/mabi.202100173] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 06/26/2021] [Indexed: 11/09/2022]
Abstract
A new and ultrasensitive impedimetric biosensor fabricated by using conjugated di-succinimide substituted polythiophene (P(ThidiSuc)) polymer modified indium tin oxide electrode is developed for the first time to detect the prostate specific membrane antigen (PSMA). The polymer P(Thi-diSuc) is synthesized by using a simple way and used in the fabrication of the proposed biosensor. The synthesized polymer contains di-succinimide groups, which offers covalent immobilization of PSMA specific antibodies. The developed strategy shortens the biosensor fabrication steps, because these active groups bind covalently to the amino ends of PSMA specific antibodies and this reaction does not require any crosslinking agent. Various characterization studies like impedimetric and voltammetric measurements, and morphological analyses are utilized to confirm the successful development of the biosensor. Under optimum conditions, the biosensing ability of the PSMA determination has a wide linear determination range from 0.015 to 14.4 pg mL-1 , as well as a low limit of detection of 6.4 fg mL-1 and a high sensitivity of 1.36 kohm pg-1 mL cm-2 . Furthermore, the proposed biosensor is able to measure the PSMA antigen in real human serums, which offers that it is a simple, low-cost, and sensitive tool with excellent potential for application in the quantification of PSMA.
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Affiliation(s)
- Elif Burcu Aydın
- Scientific and Technological Research Center, Tekirdağ Namık Kemal University, Tekirdağ, 59100, Turkey
| | - Muhammet Aydın
- Scientific and Technological Research Center, Tekirdağ Namık Kemal University, Tekirdağ, 59100, Turkey
| | - Mustafa Kemal Sezgintürk
- Faculty of Engineering, Bioengineering Department, Çanakkale Onsekiz Mart University, Çanakkale, 17020, Turkey
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15
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16
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Aydın EB, Sezgintürk MK. Fabrication of Electrochemical Immunosensor for Detection of Interleukin 8 Biomarker via Layer‐by‐layer Self‐assembly Process on Cost‐effective Fluorine Tin Oxide Electrode. ELECTROANAL 2021. [DOI: 10.1002/elan.202060603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Elif Burcu Aydın
- Tekirdağ Namık Kemal University Scientific and Technological Research Center Tekirdağ Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University Faculty of Engineering Bioengineering Department Çanakkale Turkey
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Aydin EB, Aydin M, Sezgintürk MK. A Label-free Electrochemical Immunosensor for Highly Sensitive Detection of TNF α, Based on Star Polymer-modified disposable ITO Electrode. CURR PHARM ANAL 2021. [DOI: 10.2174/1573412916999200409111759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Biomarkers are very important disease-related biomolecules which should be
analyzed sensitive and selective in related physiological fluids or tissues. Tumor necrosis factor-α is a
type of cytokine which plays vitlly important roles in different methabolic pathways such as cell death,
survival, differentiation, proliferation and migration, and infectious and inflammatory diseases including
rheumatoid arthritis, diabetes.
Objective:
In this study, it was aimed to develop a reliable tool based on star-shaped poly(glycidyl
methacrylate) polymer coated disposable indium tin oxide electrode for determination of Tumor necrosis
factor-α, an important disease biomarker.
Methods:
Star shaped polymer was used as an interface material for anti- Tumor necrosis factor α antibodies
immobilization. The antibodies were immobilized covalently onto polymer coated indium tin
oxide electrode. Electrochemical impedance spectroscopy and cyclic voltammetry techniques were
used for all electrochemical measurements.
Results:
The suggested immunosensor exhibited a linear range between 0.02 and 4 pg/mL Tumor necrosis
factor-α, and the detection limit was found as 6 fg/mL. Scanning electron microscopy and atomic
force microscopy were used for electrode surface characterization. In addition, the suggested immunosensor
was used for Tumor necrosis factor-α sensing in human serum samples. The results displayed
recoveries between 97.07 and 100.19%. Moreover, this immunosensor had a simple fabrication
procedure and a long storage-stability.
Conclusion:
A new biosensor based on a Star shaped polymer for the ultra sensitive determination of a
biomarker Tumor necrosis factor-α was developed. The biosensor presented excellent repeatability and
reproducubility, and also wide calibration range for Tumor necrosis factor- α.
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Affiliation(s)
- Elif Burcu Aydin
- Scientific and Technological Research Center, Namik Kemal University, Tekirdag,Turkey
| | - Muhammet Aydin
- Scientific and Technological Research Center, Namik Kemal University, Tekirdag,Turkey
| | - Mustafa Kemal Sezgintürk
- Bioengineering Department, Faculty of Engineering, Canakkale Onsekiz Mart University, Canakkale,Turkey
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18
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YaĞar H, Özcan HM, Mehmet O. A new electrochemical impedance biosensor based on aromatic thiol for alpha-1 antitrypsin determination. Turk J Chem 2021; 45:104-118. [PMID: 33679157 PMCID: PMC7925324 DOI: 10.3906/kim-2007-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 10/19/2020] [Indexed: 11/03/2022] Open
Abstract
Alpha-1 antitrypsin (A1AT) is one of the acute phase proteins which are synthesized in the liver. A1AT inhibits the activity of many proteases, but its main task is to protect the lungs from the attack of neutrophil elastase. In an autosomal hereditary disease known as alpha-1 antitrypsin deficiency, the A1AT level in blood serum decreases, increasing the risk of developing emphysema, liver apoptosis, and liver cancer. Thus, the detection of A1AT concentration in blood serum is very important. In this study, an impedimetric biosensor was developed, forming an SAM (self-assembled monolayer) with 4-mercaptophenylacetic acid (4MPA) on the surface of the gold electrode. An A1AT biosensor was constructed using immobilization of an A1AT-specific antibody (anti-A1AT) after activating the carboxyl groups of 4MPA with EDC/NHS. Each immobilization stage was characterized by using electrochemical impedance spectroscopy, cyclic voltammetry, and scanning electron microscopy with energy dispersive X-ray spectroscopy. With the designed biosensor, precise and highly reproducible results were obtained for A1AT concentrations in the range of 100-600 µg/mL. A1AT detection was also successfully carried out in artificial serum solutions spiked with A1AT.
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Affiliation(s)
- Hülya YaĞar
- Department of Chemistry, Faculty of Science, Trakya University, Edirne Turkey
| | - Hakkı Mevlüt Özcan
- Department of Chemistry, Faculty of Science, Trakya University, Edirne Turkey
| | - Osman Mehmet
- Department of Chemistry, Faculty of Science, Trakya University, Edirne Turkey
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19
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Gao S, Rojas-Vega F, Rocha-Martin J, Guisán JM. Oriented immobilization of antibodies through different surface regions containing amino groups: Selective immobilization through the bottom of the Fc region. Int J Biol Macromol 2021; 177:19-28. [PMID: 33607135 DOI: 10.1016/j.ijbiomac.2021.02.103] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/29/2021] [Accepted: 02/14/2021] [Indexed: 10/22/2022]
Abstract
Amino groups on the antibody surface (amino terminus and Lys) are very interesting conjugation targets due to their substantial quantities and selectivity toward various reactive groups. Oriented immobilization of antibodies via amino moieties on the Fc region instead of the antigen-binding fragment (Fab) is highly appreciated to conserve antigen-binding capacity. In this paper, targeting amino moieties on distinct regions, three antibody immobilization strategies were compared with the recognition ability of corresponding adsorbents. Our results demonstrate that oriented immobilization of antibodies onto heterofunctional chelate-epoxy support selectively involving Lys residues placed at the bottom of the Fc region, thus preserved the highest antigen recognition capacity (over 75% functionality). For homofunctional aldehyde support, immobilization at pH 10 demonstrates 50% remaining functionality due to the random orientation of tethered antibodies; while only 10% functionality remained when N-terminus were specifically conjugated at pH 8.5. With the rationalization of moieties density onto heterofunctional support, 2-fold recognition capacity was exhibited over randomly immobilization for antigens with higher size (β-galactosidase, 425 kDa vs. horseradish peroxidase, 40 kDa). Meanwhile, at least 97% of antigens with a varied concentration in diluted human serum were efficiently captured by the optimized chelate-epoxy support. Therefore, our antibody immobilization protocol proved the potential to be utilized as a promising candidate to capture voluminous antigens (large proteins and cells) in real samples.
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Affiliation(s)
- Shipeng Gao
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049 Madrid, Spain
| | - Francisco Rojas-Vega
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049 Madrid, Spain
| | - Javier Rocha-Martin
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049 Madrid, Spain.
| | - José M Guisán
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049 Madrid, Spain.
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20
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Vural B, ÇaliŞkan M, SezgİntÜrk MK. Development of a biosensor platform based on ITO sheets modified with 3-glycidoxypropyltrimethoxysilane for early detection of TRAP1. Turk J Chem 2021; 44:461-471. [PMID: 33488170 PMCID: PMC7671199 DOI: 10.3906/kim-1909-53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 02/19/2020] [Indexed: 11/03/2022] Open
Abstract
The aim of this research was to design an electrochemical immunosensor for determination of tumour necrosis factor receptor-associated protein-1(TRAP1) antigen, a heat shock protein linked to tumour necrosis factor. The indium-tin oxide covered polyethylene terephthalate (ITO-PET) electrode surface was cleaned and was prepared for the introduction of hydroxyl groups on its surface by using NH4 OH/H2 O2 /H2 O. As a silanization agent for covalent attachment of anti-TRAP1 on the surface of the ITO working electrode, 3-glycidoxypropyltrimethoxysilane (3-GOPS) was used. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to characterize the immobilization steps. A variety of parameters, 3-GOPS and anti-TRAP1 concentrations, and anti-TRAP1 and TRAP1 incubation durations were optimized. After determining the optimum conditions, characterization studies such as repeatability, reproducibility, regeneration, square wave voltammetry, and single frequency impedance were performed. The electrochemical immunosensor has presented an extremely wide determination range for TRAP1 from 0.1 pg/mL to 100 pg/mL.
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Affiliation(s)
- Berfin Vural
- Department of Bioengineering, Faculty of Engineering, Çanakkale Onsekiz Mart University, Çanakkale Turkey
| | - Meltem ÇaliŞkan
- Department of Bioengineering, Faculty of Engineering, Çanakkale Onsekiz Mart University, Çanakkale Turkey
| | - Mustafa Kemal SezgİntÜrk
- Department of Bioengineering, Faculty of Engineering, Çanakkale Onsekiz Mart University, Çanakkale Turkey
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21
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Ali Z, Basharat M, Wu Z. A Review on the Morphologically Controlled Synthesis of Polyphosphazenes for Electrochemical Applications. ChemElectroChem 2021. [DOI: 10.1002/celc.202001352] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Zahid Ali
- State Key Laboratory of High-Performance Carbon Fiber and Functional Polymers Beijing University of Chemical Technology Ministry of Education Beijing 100029 P.R. China
| | - Majid Basharat
- State Key Laboratory of High-Performance Carbon Fiber and Functional Polymers Beijing University of Chemical Technology Ministry of Education Beijing 100029 P.R. China
| | - Zhanpeng Wu
- State Key Laboratory of High-Performance Carbon Fiber and Functional Polymers Beijing University of Chemical Technology Ministry of Education Beijing 100029 P.R. China
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22
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Fabrication of electrochemical immunosensor based on acid-substituted poly(pyrrole) polymer modified disposable ITO electrode for sensitive detection of CCR4 cancer biomarker in human serum. Talanta 2021; 222:121487. [DOI: 10.1016/j.talanta.2020.121487] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 07/20/2020] [Accepted: 07/29/2020] [Indexed: 02/07/2023]
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23
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Aydın EB, Aydın M, Sezgintürk MK. A novel electrochemical immunosensor based on acetylene black/epoxy-substituted-polypyrrole polymer composite for the highly sensitive and selective detection of interleukin 6. Talanta 2021; 222:121596. [DOI: 10.1016/j.talanta.2020.121596] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/21/2020] [Accepted: 08/26/2020] [Indexed: 12/21/2022]
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24
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Aydın EB, Sezgintürk MK. Ultrasensitive detection of interleukin 1α using 3-phosphonopropionic acid modified FTO surface as an effective platform for disposable biosensor fabrication. Bioelectrochemistry 2020; 138:107698. [PMID: 33254051 DOI: 10.1016/j.bioelechem.2020.107698] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/21/2020] [Accepted: 10/31/2020] [Indexed: 01/09/2023]
Abstract
In this study, we utilized a carboxyalkylphosphonic acid covered fluorine doped tin oxide (FTO) as an electrode material for fabrication of Interleukin 1α (IL-1α) immunosensor. For this aim, anti-IL-1α antibodies were attached on the 3-phosphonopropionic acid (PHP) modified FTO surface covalently. Electrochemical (electrochemical impedance spectroscopy and cyclic voltammetry) and morphological (scanning electron microscopy and atomic force microscopy) characterizations were performed to monitor the successful fabrication of immunoelectrodes. After incubation of anti-IL-1α antibody immobilized FTO electrodes in IL-1α antigen solutions, increases were seen in impedimetric responses. IL-1α antigen was determined in a linear detection range from 0.02 to 2 pg/mL by EIS. The detection limit of the suggested immunosensor was 6 fg/mL. The applicability of the designed biosensor was tested by using human serum and saliva samples and acceptable results were obtained. In addition, high sensitivity, good specificity, low detection limit made the proposed immunosensor a potential technique for IL-1α antigen determination in routine clinical analysis.
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Affiliation(s)
- Elif Burcu Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ Turkey.
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey
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25
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Aydın EB, Aydın M, Sezgintürk MK. A label-free immunosensor for sensitive detection of RACK 1 cancer biomarker based on conjugated polymer modified ITO electrode. J Pharm Biomed Anal 2020; 190:113517. [PMID: 32784093 DOI: 10.1016/j.jpba.2020.113517] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/27/2020] [Accepted: 07/27/2020] [Indexed: 11/19/2022]
Abstract
A new flexible biosensor based on conjugated polymer functionalized indium tin oxide (ITO) sheet was fabricated for Receptor for Activated C Kinase 1 (RACK 1) determination. Poly(3-thiophene acetic acid) (P(Thi-Ac)) was used as an immobilization matrix for construction of RACK 1 immunosensor. This polymer had a great number of carboxyl groups on its end site and these carboxyl ends provided anchoring points to the anti-RACK 1 antibodies. Anti-RACK 1 antibodies were covalently attached on the ITO electrode and recognized the RACK 1 antigens. Electrochemical characterizations were made by employing electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques. Additionally, single frequency impedance method (SFI) was applied to follow the specific biointeraction between antibody and antigen. As a result of specific biointeraction, the designed immunosensor exhibited a wide linear detection range between 0.01 pg/mL and 2 pg/mL RACK 1 with a detection limit of 3.1 fg/mL. Scanning electron microscopy and atomic force microscopy analyses were employed for electrode surface morphology investigation. The designed RACK 1 biosensor had good repeatability (5.73 %, RSD), excellent reproducibility (2.5 %, RSD), long storage-stability and reusable property. In addition, the fabricated RACK 1 biosensor was applied to determine RACK 1 concentration in human serums and the recovery was ranging from 98.79%-100.22%. This work illustrated a new tool to construct a sensitive and low-cost disposable biosensor for applications in clinical monitoring.
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Affiliation(s)
- Elif Burcu Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Muhammet Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey.
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26
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Mardani A, Heshami M, Shariati Y, Kazemi F, Abdollahi Kakroudi M, Kaboudin B. A tunable synthesis of either benzaldehyde or benzoic acid through blue-violet LED irradiation using TBATB. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112220] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Lamarca RS, Faria RADD, Zanoni MVB, Nalin M, Lima Gomes PCFD, Messaddeq Y. Simple, fast and environmentally friendly method to determine ciprofloxacin in wastewater samples based on an impedimetric immunosensor. RSC Adv 2020; 10:1838-1847. [PMID: 35494561 PMCID: PMC9047983 DOI: 10.1039/c9ra09083e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 12/18/2019] [Indexed: 12/17/2022] Open
Abstract
In this study an impedimetric immunosensor was developed in order to determine ciprofloxacin (CIP) in wastewater samples, an emergent contaminant widely found in wastewater. To achieve this, an anti-ciprofloxacin antibody was immobilized on the surface of a printed carbon electrode. Then, the developed immunosensor was applied in wastewater samples from Université Laval residences (Québec, Canada) through the load transfer resistance (Rct) using [Fe(CN)6]3−/4− as a redox probe, and the average CIP concentration was found to be 2.90 × 10−4 μg mL−1. The observed Rct changes presented a linear relationship from CIP concentrations of 10−5 to 1.0 μg mL−1, with detection and quantification limits of 2.50 × 10−6 and 7.90 × 10−6 μg mL−1, respectively. The immunosensor presented high selectivity and repeatability, as well as a good recovery rate in wastewater samples (97%). Significant interference with other compounds was not observed. The proposed method requires only 30 μL of sample without the use of organic solvents or preceding sample preparation and/or extraction techniques. Moreover, the method is fast: only 20 min of incubation followed by 2 min of analysis time was sufficient to obtain the CIP concentration. The method's estimated cost is U$ 2.00 per sample. In this study an impedimetric immunosensor was developed in order to determine ciprofloxacin (CIP) in wastewater samples, an emergent contaminant widely found in wastewater samples.![]()
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Affiliation(s)
| | | | - Maria Valnice Boldrin Zanoni
- UNESP
- National Institute for Alternative Technologies of Detection
- Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM)
- Institute of Chemistry
- São Paulo State University – UNESP
| | - Marcelo Nalin
- Institute of Chemistry
- São Paulo State University (UNESP)
- Araraquara
- Brazil
| | - Paulo Clairmont Feitosa de Lima Gomes
- UNESP
- National Institute for Alternative Technologies of Detection
- Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM)
- Institute of Chemistry
- São Paulo State University – UNESP
| | - Younès Messaddeq
- Center for Optics, Photonics and Laser (COPL)
- Université Laval
- Quebec
- Canada
- Institute of Chemistry
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28
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Aydın EB, Aydın M, Sezgintürk MK. The development of an ultra-sensitive electrochemical immunosensor using a PPyr-NHS functionalized disposable ITO sheet for the detection of interleukin 6 in real human serums. NEW J CHEM 2020. [DOI: 10.1039/d0nj03183f] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A label-free biosensor based on poly(pyrrole N-hydroxy succinimide) polymer modified ITO electrode was developed for sensitive detection of interleukin 6 antigen. Under optimized conditions, it had a wide detection range (0.03–22.5 pg mL−1).
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Affiliation(s)
- Elif Burcu Aydın
- Namık Kemal University
- Scientific and Technological Research Center
- Tekirdağ
- Turkey
| | - Muhammet Aydın
- Namık Kemal University
- Scientific and Technological Research Center
- Tekirdağ
- Turkey
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29
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Aydın M. A sensitive and selective approach for detection of IL 1α cancer biomarker using disposable ITO electrode modified with epoxy-substituted polythiophene polymer. Biosens Bioelectron 2019; 144:111675. [DOI: 10.1016/j.bios.2019.111675] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/26/2019] [Accepted: 09/03/2019] [Indexed: 01/05/2023]
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30
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Aydın EB, Sezgintürk MK. A comparison between LP(GMA) and CLP(GMA) polymer composites as an immobilization matrix for biosensing applications: A model immunosensor for IL 1α. Anal Chim Acta 2019; 1077:129-139. [DOI: 10.1016/j.aca.2019.05.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/15/2019] [Accepted: 05/20/2019] [Indexed: 01/17/2023]
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31
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Aydın EB, Aydın M, Sezgintürk MK. Ultrasensitive determination of cadherin-like protein 22 with a label-free electrochemical immunosensor using brush type poly(thiophene-g-glycidylmethacrylate) modified disposable ITO electrode. Talanta 2019; 200:387-397. [DOI: 10.1016/j.talanta.2019.03.082] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 03/18/2019] [Accepted: 03/21/2019] [Indexed: 10/27/2022]
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32
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Aydın M, Aydın EB, Sezgintürk MK. A Highly Selective Poly(thiophene)‐graft‐Poly(methacrylamide) Polymer Modified ITO Electrode for Neuron Specific Enolase Detection in Human Serum. Macromol Biosci 2019; 19:e1900109. [DOI: 10.1002/mabi.201900109] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/31/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Muhammet Aydın
- Tekirdagˇ Namık Kemal UniversityScientific and Technological Research Center Tekirdagˇ 59000 Turkey
| | - Elif Burcu Aydın
- Tekirdagˇ Namık Kemal UniversityScientific and Technological Research Center Tekirdagˇ 59000 Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart UniversityFaculty of Engineering, Bioengineering Department Çanakkale 17000 Turkey
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33
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Abstract
Immunosensors are compact tools on which antibody and antigen interactions are formed. The specific interaction between antibody and antigen is detected by using a transducer and an electrical signal is measured. This specific interaction between these molecules makes immunosensor very attractive for several applications in different fields. Electrochemical immunosensors are successful devices in selective and sensitive detection of several analytes. Electrochemical transducing methods such as voltammetric, potentiometric, conductometric or impedimetric have been utilized in different applications due to their excellent properties such as being low-cost, sensitivity and simplicity. In this chapter, the fundamentals of electrochemical immunosensors are summarized and different applications in food, environmental and clinical analyses are investigated and discussed.
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Affiliation(s)
- Elif Burcu Aydin
- Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey.
| | - Muhammet Aydin
- Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey
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34
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Ito Y, Okuda-Shimazaki J, Tsugawa W, Loew N, Shitanda I, Lin CE, La Belle J, Sode K. Third generation impedimetric sensor employing direct electron transfer type glucose dehydrogenase. Biosens Bioelectron 2019; 129:189-197. [PMID: 30721794 DOI: 10.1016/j.bios.2019.01.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 12/12/2018] [Accepted: 01/02/2019] [Indexed: 01/30/2023]
Abstract
Faradaic electrochemical impedance spectroscopy (faradaic EIS) is an attractive measurement principle for biosensors. However, there have been no reports on sensors employing direct electron transfer (DET)-type redox enzymes based on faradaic EIS principle. In this study, we have attempted to construct the 3rd-generation faradaic enzyme EIS sensor, which used DET-type flavin adenine dinucleotide (FAD) dependent glucose dehydrogenase (GDH) complex, to elucidate its characteristic properties as well as to investigate its potential application as the future immunosensor platform. The gold disk electrodes (GDEs) with DET-type FADGDH prepared using self-assembled monolayer (SAM) showed the glucose concentration dependent impedance change, which was confirmed by the change in the charge transfer resistance (Rct). The Δ(1/Rct) values were also affected by DC bias potential and the length of SAM. Based on the Nyquist plot and Bode plot simulations, glucose sensing by imaginary impedance monitoring under fixed frequency (5 mHz) was carried out, revealing the higher sensitivity at low glucose concentration with wider linear range (0.02-0.2 mM). Considering this high sensitivity toward glucose, the 3rd-generation faradaic enzyme EIS sensor would provide alternative platform for future impedimetric immunosensing system, which does not use redox probe.
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Affiliation(s)
- Yuka Ito
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Junko Okuda-Shimazaki
- Ultizyme International Ltd., 1-13-16, Minami, Meguro, Tokyo 152-0013, Japan; Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 and North Carolina State University, Raleigh, NC 27695, USA
| | - Wakako Tsugawa
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Noya Loew
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 and North Carolina State University, Raleigh, NC 27695, USA
| | - Isao Shitanda
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - Chi-En Lin
- School of Biological and Health System Engineering, Ira A. Fulton Schools of Engineering, Arizona State University, P.O.Box 879709, Tempe, AZ 85287-9719, USA
| | - Jeffrey La Belle
- School of Biological and Health System Engineering, Ira A. Fulton Schools of Engineering, Arizona State University, P.O.Box 879709, Tempe, AZ 85287-9719, USA
| | - Koji Sode
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan; Ultizyme International Ltd., 1-13-16, Minami, Meguro, Tokyo 152-0013, Japan; Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 and North Carolina State University, Raleigh, NC 27695, USA.
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