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El-Kamel RS, Fekry AM. Enhanced modified poly-tyrosine voltammetric sensor for the quantification detection of salivary pepsin. Int J Biol Macromol 2024; 277:134178. [PMID: 39067726 DOI: 10.1016/j.ijbiomac.2024.134178] [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: 06/10/2024] [Revised: 07/23/2024] [Accepted: 07/24/2024] [Indexed: 07/30/2024]
Abstract
Pepsin as an aspartic acid protease member and one of the three foremost proteolytic enzymes in the digestive system is essential to be detected. An electrochemically polymerized tyrosine film on carbon paste electrode (pTyr/CPE) has been synthesized by electro-polymerization donating an affordable electrochemical sensor to sense salivary pepsin as a diagnostic technique for gastroesophageal reflux disease (GRD) due to saliva collection is non-invasive and relatively comfortable. The pTyr/CPE was applied for Voltammetric sensing of pepsin and its quantification in phosphate buffer solution of pH 2.0 (PBS). Scanning electron microscopy (SEM) was conducted to learn the surface morphology. Cyclic voltammetry (CV), differential pulse voltammetry (DPVs), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) were developed to realize the electrocatalytic activity of the sensor. The pTyr/CPE proceeded as a sensitive detector to pepsin with two linear ranges from 1 to 20 & 20 to 100 ng/mL donating two limits of detection as 0.5 & 0.09 ng/mL, respectively, and high selectivity toward pepsin, as well as stability and fast response of 1.5 s. Consequently, it is guessed that the pTyr/CPE sensor could be supportive for the initial diagnosis of GRD through the detection of pepsin in saliva. Finally, we quantified the pepsin levels in saliva samples of LPR patients (n = 2), showing that the results were agreeable with those from the electrochemical sensor.
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Affiliation(s)
- Renad S El-Kamel
- Cairo University, Faculty of Science, Department of Chemistry, Giza, Egypt
| | - Amany M Fekry
- Cairo University, Faculty of Science, Department of Chemistry, Giza, Egypt.
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2
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Parkhe VS, Tiwari AP. Gold nanoparticles-based biosensors: pioneering solutions for bacterial and viral pathogen detection-a comprehensive review. World J Microbiol Biotechnol 2024; 40:269. [PMID: 39009934 DOI: 10.1007/s11274-024-04072-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 07/03/2024] [Indexed: 07/17/2024]
Abstract
Gold Nanoparticles (AuNPs) have gained significant attention in biosensor development due to their unique physical, chemical, and optical properties. When incorporated into biosensors, AuNPs offer several advantages, including a high surface area-to-volume ratio, excellent biocompatibility, ease of functionalization, and tunable optical properties. These properties make them ideal for the detection of various biomolecules, including proteins, nucleic acids, and bacterial and viral biomarkers. Traditional methods for detecting bacteria and viruses, such as RT-PCR and ELISA, often suffer from complexities, time consumption, and labor intensiveness. Consequently, researchers are continuously exploring novel devices to address these limitations and effectively detect a diverse array of infectious pathogenic microorganisms. In light of these challenges, nanotechnology has been instrumental in refining the architecture and performance of biosensors. By leveraging advancements in nanomaterials and strategies of biosensor fabrication the sensitivity and specificity of biosensors can be enhanced, enabling more precise detection of pathogenic bacteria and viruses. This review explores the versatility of AuNPs in detecting a variety of biomolecules, including proteins, nucleic acids, and bacterial and viral biomarkers. Furthermore, it evaluates recent advancements in AuNPs-based biosensors for the detection of pathogens, utilizing techniques such as optical biosensors, lateral flow immunoassays, colorimetric immunosensors, electrochemical biosensors, and fluorescence nanobiosensors. Additionally, the study discusses the existing challenges in the field and proposes future directions to improve AuNPs-based biosensors, with a focus on enhancing sensitivity, selectivity, and their utility in clinical and diagnostic applications.
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Affiliation(s)
- Vishakha Suryakant Parkhe
- Department of Medical Biotechnology and Stem Cells and Regenerative Medicine, Centre for Interdisciplinary Research, D.Y. Patil Education Society, Deemed to be University, Kolhapur, Maharashtra, 416006, India
| | - Arpita Pandey Tiwari
- Department of Medical Biotechnology and Stem Cells and Regenerative Medicine, Centre for Interdisciplinary Research, D.Y. Patil Education Society, Deemed to be University, Kolhapur, Maharashtra, 416006, India.
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3
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Panagopoulou C, Skotadis E, Aslanidis E, Tzourmana G, Rapesi A, Tsioustas C, Kainourgiaki M, Kleitsiotis G, Tsekenis G, Tsoukalas D. Non-Faradaic Impedimetric Detection of Heavy Metal Ions via a Hybrid Nanoparticle-DNAzyme Biosensor. BIOSENSORS 2024; 14:321. [PMID: 39056597 PMCID: PMC11274724 DOI: 10.3390/bios14070321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/21/2024] [Accepted: 06/24/2024] [Indexed: 07/28/2024]
Abstract
Due to rapid industrialization, novel water-quality monitoring techniques for the detection of highly toxic and hazardous heavy metal ions are essential. Herein, a hybrid noble nanoparticle/DNAzyme electrochemical biosensor is proposed for the simultaneous and label-free detection of Pb2+ and Cr3+ in aqueous solutions. The sensor is based on the combination of a two-dimensional naked-platinum nanoparticle film and DNAzymes, whose double-helix configuration disassembles into smaller fragments in the presence of target-specific heavy metal ions. The electrochemical behavior of the fabricated sensor was investigated with non-faradaic electrochemical impedance spectroscopy (EIS), resulting in the successful detection of Pb2+ and Cr3+ well below their maximum permitted levels in tap water. So far, there has been no report on the successful detection of heavy metal ions utilizing the non-faradaic electrochemical impedance spectroscopy technique based on advanced nanomaterials paired with DNAzymes. This is also one of the few reports on the successful detection of chromium (III) via a sensor incorporating DNAzymes.
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Affiliation(s)
- Chrysi Panagopoulou
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
| | - Evangelos Skotadis
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
- Department of Biomedical Engineering, The University of West Attica, 12243 Athens, Greece
| | - Evangelos Aslanidis
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
- Microelectronics Research Group (MRG), Institute of Electronic Structure and Laser (IESL), Foundation of Research & Technology Hellas (FORTH), 70013 Heraklion, Greece
| | - Georgia Tzourmana
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
| | - Annita Rapesi
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
| | - Charalampos Tsioustas
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
| | - Maria Kainourgiaki
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
| | - Georgios Kleitsiotis
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
| | - George Tsekenis
- Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece;
| | - Dimitrios Tsoukalas
- Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece; (C.P.); or (E.A.); (G.T.); (A.R.); (C.T.); (M.K.); (G.K.); (D.T.)
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4
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Jelen Ž, Kovač J, Rudolf R. Study of Gold Nanoparticles Conjugated with SARS-CoV-2 S1 Spike Protein Fragments. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2160. [PMID: 37570478 PMCID: PMC10421057 DOI: 10.3390/nano13152160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023]
Abstract
This study reports on the successful conjugation of SARS-CoV-2 S1 spike protein fragments with gold nanoparticles (AuNPs) that were synthesised with Ultrasonic Spray Pyrolysis (USP). This method enables the continuous synthesis of AuNPs with a high degree of purity, round shapes, and the formation of a surface that allows various modifications. The conjugation mechanism of USP synthesized AuNPs with SARS-CoV-2 S1 spike protein fragments was investigated. A gel electrophoresis experiment confirmed the successful conjugation of AuNPs with SARS-CoV-2 S1 fragments indirectly. X-ray Photoelectron Spectroscopy (XPS) analysis confirmed the presence of characteristic O1s and N1s peaks, which indicated that specific binding between AuNPs and SARS-CoV-2 S1 spike protein fragments takes place via a peptide bond formed with the citrate stabiliser. This bond is coordinated to the AuNP's surface and the N-terminals of the protein, with the conjugate displaying the expected response within a prototype LFIA test. This study will help in better understanding the behaviour of AuNPs synthesised with USP and their potential use as sensors in colorimetric or electrochemical sensors and LFIA tests.
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Affiliation(s)
- Žiga Jelen
- Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia;
| | - Janez Kovač
- Department of Surface Engineering, Institut Jožef Stefan, Jamova 39, SI-1000 Ljubljana, Slovenia;
| | - Rebeka Rudolf
- Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia;
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Oliveira AEF, Pereira AC, Ferreira LF. Disposable electropolymerized molecularly imprinted electrochemical sensor for determination of breast cancer biomarker CA 15-3 in human serum samples. Talanta 2023; 252:123819. [DOI: 10.1016/j.talanta.2022.123819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 08/02/2022] [Accepted: 08/03/2022] [Indexed: 10/15/2022]
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Chin Chwan Chuong JJ, Rahman M, Ibrahim N, Heng LY, Tan LL, Ahmad A. Harmful Microalgae Detection: Biosensors versus Some Conventional Methods. SENSORS (BASEL, SWITZERLAND) 2022; 22:3144. [PMID: 35590834 PMCID: PMC9103738 DOI: 10.3390/s22093144] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/18/2022] [Accepted: 04/19/2022] [Indexed: 12/10/2022]
Abstract
In the last decade, there has been a steady stream of information on the methods and techniques available for detecting harmful algae species. The conventional approaches to identify harmful algal bloom (HAB), such as microscopy and molecular biological methods are mainly laboratory-based and require long assay times, skilled manpower, and pre-enrichment of samples involving various pre-experimental preparations. As an alternative, biosensors with a simple and rapid detection strategy could be an improvement over conventional methods for the detection of toxic algae species. Moreover, recent biosensors that involve the use of nanomaterials to detect HAB are showing further enhanced detection limits with a broader linear range. The improvement is attributed to nanomaterials' high surface area to volume ratio, excellent biological compatibility with biomolecules, and being capable of amplifying the electrochemical signal. Hence, this review presents the potential usage of biosensors over conventional methods to detect HABs. The methods reported for the detection of harmful algae species, ranging from conventional detection methods to current biosensor approaches will be discussed, along with their respective advantages and drawbacks to indicate the future prospects of biosensor technology for HAB event management.
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Affiliation(s)
- Jeremy Jason Chin Chwan Chuong
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia; (J.J.C.C.C.); (N.I.); (L.L.T.)
| | - Mahbubur Rahman
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia;
- Department of General Educational Development (GED), Faculty of Science & Information Technology, Daffodil International University, Dhaka 1341, Bangladesh
| | - Nadiah Ibrahim
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia; (J.J.C.C.C.); (N.I.); (L.L.T.)
| | - Lee Yook Heng
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia;
| | - Ling Ling Tan
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia; (J.J.C.C.C.); (N.I.); (L.L.T.)
| | - Asmat Ahmad
- School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia;
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7
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A Label and Probe-Free Zika Virus Immunosensor Prussian Blue@carbon Nanotube-Based for Amperometric Detection of the NS2B Protein. BIOSENSORS-BASEL 2021; 11:bios11050157. [PMID: 34065688 PMCID: PMC8156682 DOI: 10.3390/bios11050157] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/02/2021] [Accepted: 05/10/2021] [Indexed: 12/14/2022]
Abstract
Zika virus (ZIKV) is a mosquito-borne infection, predominant in tropical and subtropical regions causing international concern due to the ZIKV disease having been associated with congenital disabilities, especially microcephaly and other congenital abnormalities in the fetus and newborns. Development of strategies that minimize the devastating impact by monitoring and preventing ZIKV transmission through sexual intercourse, especially in pregnant women, since no vaccine is yet available for the prevention or treatment, is critically important. ZIKV infection is generally asymptomatic and cross-reactivity with dengue virus (DENV) is a global concern. An innovative screen-printed electrode (SPE) was developed for amperometric detection of the non-structural protein (NS2B) of ZIKV by exploring the intrinsic redox catalytic activity of Prussian blue (PB), incorporated into a carbon nanotube–polypyrrole composite. Thus, this immunosensor has the advantage of electrochemical detection without adding any redox-probe solution (probe-less detection), allowing a point-of-care diagnosis. It was responsive to serum samples of only ZIKV positive patients and non-responsive to negative ZIKV patients, even if the sample was DENV positive, indicating a possible differential diagnosis between them by NS2B. All samples used here were confirmed by CDC protocols, and immunosensor responses were also checked in the supernatant of C6/36 and in Vero cell cultures infected with ZIKV.
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8
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Baldassarre A, Mucci N, Lecca LI, Tomasini E, Parcias-do-Rosario MJ, Pereira CT, Arcangeli G, Oliveira PAB. Biosensors in Occupational Safety and Health Management: A Narrative Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E2461. [PMID: 32260295 PMCID: PMC7177223 DOI: 10.3390/ijerph17072461] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/31/2020] [Accepted: 04/02/2020] [Indexed: 12/20/2022]
Abstract
A sensor is a device used to gather information registered by some biological, physical or chemical change, and then convert the information into a measurable signal. The first biosensor prototype was conceived more than a century ago, in 1906, but a properly defined biosensor was only developed later in 1956. Some of them have reached the commercial stage and are routinely used in environmental and agricultural applications, and especially, in clinical laboratory and industrial analysis, mostly because it is an economical, simple and efficient instrument for the in situ detection of the bioavailability of a broad range of environmental pollutants. We propose a narrative review, that found 32 papers and aims to discuss the possible uses of biosensors, focusing on their use in the area of occupational safety and health (OSH).
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Affiliation(s)
- Antonio Baldassarre
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Nicola Mucci
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Luigi Isaia Lecca
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Emanuela Tomasini
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | | | - Carolina Tauil Pereira
- Hospital De Clinicas, Serviço de Medicina Ocupacional, Porto Alegre 90035-007, Rio Grande do Sul, Brazil
| | - Giulio Arcangeli
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
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9
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Impedimetric detection of Banana bunchy top virus using CdSe quantum dots for signal amplification. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2345-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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10
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Zorea J, Shukla RP, Elkabets M, Ben-Yoav H. Probing antibody surface density and analyte antigen incubation time as dominant parameters influencing the antibody-antigen recognition events of a non-faradaic and diffusion-restricted electrochemical immunosensor. Anal Bioanal Chem 2020; 412:1709-1717. [PMID: 31996962 PMCID: PMC7026205 DOI: 10.1007/s00216-020-02417-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/09/2020] [Accepted: 01/13/2020] [Indexed: 12/17/2022]
Abstract
Electrochemical sensors based on antibody-antigen recognition events are commonly used for the rapid, label-free, and sensitive detection of various analytes. However, various parameters at the bioelectronic interface, i.e., before and after the probe (such as an antibody) assembly onto the electrode, have a dominant influence on the underlying detection performance of analytes (such as an antigen). In this work, we thoroughly investigate the dependence of the bioelectronic interface characteristics on parameters that have not been investigated in depth: the antibody density on the electrode’s surface and the antigen incubation time. For this important aim, we utilized the sensitive non-faradaic electrochemical impedance spectroscopy method. We showed that as the incubation time of the antigen-containing drop solution increased, a decrease was observed in both the solution resistance and the diffusional resistance with reflecting boundary elements, as well as the capacitive magnitude of a constant phase element, which decreased at a rate of 160 ± 30 kΩ/min, 800 ± 100 mΩ/min, and 520 ± 80 pF × s(α-1)/min, respectively. Using atomic force microscopy, we also showed that high antibody density led to thicker electrode coating than low antibody density, with root-mean-square roughness values of 2.2 ± 0.2 nm versus 1.28 ± 0.04 nm, respectively. Furthermore, we showed that as the antigen accumulated onto the electrode, the solution resistance increased for high antibody density and decreased for low antibody density. Finally, the antigen detection performance test yielded a better limit of detection for low antibody density than for high antibody density (0.26 μM vs 2.2 μM). Overall, we show here the importance of these two factors and how changing one parameter can drastically affect the desired outcome. Graphical abstract ![]()
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Affiliation(s)
- Jonathan Zorea
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel.,Nanobioelectronics Laboratory (NBEL), Department of Biomedical Engineering and Ilse Katz Institute of Nanoscale Science and Technology, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Rajendra P Shukla
- Nanobioelectronics Laboratory (NBEL), Department of Biomedical Engineering and Ilse Katz Institute of Nanoscale Science and Technology, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Moshe Elkabets
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Hadar Ben-Yoav
- Nanobioelectronics Laboratory (NBEL), Department of Biomedical Engineering and Ilse Katz Institute of Nanoscale Science and Technology, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel.
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11
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Functionalized Upconversion Nanoparticles for Targeted Labelling of Bladder Cancer Cells. Biomolecules 2019; 9:biom9120820. [PMID: 31816991 PMCID: PMC6995529 DOI: 10.3390/biom9120820] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 11/29/2019] [Accepted: 12/02/2019] [Indexed: 01/22/2023] Open
Abstract
Bladder cancer is the ninth most common cancer worldwide. Due to a high risk of recurrence and progression of bladder cancer, every patient needs long-term surveillance, which includes regular cystoscopy, sometimes followed by a biopsy of suspicious lesions or resections of recurring tumours. This study addresses the development of novel biohybrid nanocomplexes representing upconversion nanoparticles (UCNP) coupled to antibodies for photoluminescent (PL) detection of bladder cancer cells. Carrying specific antibodies, these nanoconjugates selectively bind to urothelial carcinoma cells and make them visible by emitting visible PL upon excitation with deeply penetrating near-infrared light. UCNP were coated with a silica layer and linked to anti-Glypican-1 antibody MIL38 via silica-specific solid-binding peptide. Conjugates have been shown to specifically attach to urothelial carcinoma cells with high expression of Glypican-1. This result highlights the potential of produced conjugates and conjugation technology for further studies of their application in the tumour detection and fluorescence-guided resection.
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12
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Negahdary M, Behjati-Ardakani M, Heli H. An electrochemical troponin T aptasensor based on the use of a macroporous gold nanostructure. Mikrochim Acta 2019; 186:377. [PMID: 31134399 DOI: 10.1007/s00604-019-3472-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 04/29/2019] [Indexed: 11/24/2022]
Abstract
A specific troponin T (TnT) binding aptamer was identified and immobilized on an electrodeposited macroporous gold nanostructure using poly(ethylene glycol) 600, to fabricate a novel and ultrasensitive TnT aptasensor. The transducer surface on the gold disk electrode was characterized by field emission scanning electron microscopy, and immobilization of the aptamer was monitored by open circuit potential measurements. Binding of TnT by the aptamer was monitored by differential pulse voltammetry using ferro/ferricyanide as the redox probe. The aptamer has a high affinity and specificity, and the electrode is sensitive and selective. Best operated at a working potential of 0.23 V (vs. Ag/AgCl), the electrode can detected TnT in the 0.05 to 5.0 ng mL-1 concentration range with a 23 pg mL-1 detection limit. The method was applied to the determination of TnT in 99 spiked human serum samples, and the diagnostic sensitivity and specificity were 94 and 95%, respectively. Graphical abstract Schematic presentation of an electrochemical troponin T aptasensor. A macroporous gold nanostructure was electrodeposited followed by immobilization of a specific TnT aptamer. Binding of TnT by the aptamer was electrochemically monitored. MCH: mercaptohexanol; TnT: troponin T.
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Affiliation(s)
- Masoud Negahdary
- Yazd Cardiovascular Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, 8916978477, Iran.,Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, 71936355899, Iran
| | - Mostafa Behjati-Ardakani
- Yazd Cardiovascular Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, 8916978477, Iran
| | - Hossein Heli
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, 71936355899, Iran.
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13
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Zhang W, Wang L, Yang Y, Gaskin P, Teng KS. Recent Advances on Electrochemical Sensors for the Detection of Organic Disinfection Byproducts in Water. ACS Sens 2019; 4:1138-1150. [PMID: 31012308 DOI: 10.1021/acssensors.9b00272] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Irreversible organ damage or even death frequently occurs when humans or animals unknowingly drink contaminated water. Therefore, in many countries drinking water is disinfected to ensure removal of harmful pathogens from drinking water. If upstream water treatment prior to disinfection is not adequate, disinfection byproducts (DBPs) can be formed. DBPs can exist as wide variety of compounds, but up until now, only several typical compounds have drinking water standards attributed to them. However, it is apparent that the range of DBPs present in water can comprise hundreds of compounds, some of which are at high enough concentrations to be toxic or potentially carcinogenic. Hence, it becomes increasingly significant and urgent to develop an accessible, affordable, and durable sensing platform for a broader range and more sensitive detection of DBPs. Compared with well-established laboratory detection techniques, electrochemical sensing has been identified as a promising alternative that will provide rapid, affordable, and sensitive DBP monitoring in remote water sources. Therefore, this Review covers current state-of-the-art development (within the past decade) in electrochemical sensing to detect organic DBPs in water, which covered three major aspects: (1) recognition mechanism, (2) electrodes with signal amplification, and (3) signal read-out techniques. Moreover, comprehensive quality assessments on electrochemical biosensors, including linear detection range, limit of detection (LoD) and recovery, have also been summarized.
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Affiliation(s)
- Wei Zhang
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, United Kingdom
- Research Centre for Water Environment Technology, Department of Urban Engineering, The University of Tokyo, Tokyo 113-0033, Japan
| | - Lue Wang
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, United Kingdom
| | - Yuesuo Yang
- College of Environment and Recourses, Jilin University, Changchun 130012, China
| | - Paul Gaskin
- Dŵr Cymru Welsh Water, Newport, NP10 8FZ, United Kingdom
| | - Kar Seng Teng
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, United Kingdom
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14
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Mavrikou S, Moschopoulou G, Zafeirakis A, Kalogeropoulou K, Giannakos G, Skevis A, Kintzios S. An Ultra-Rapid Biosensory Point-of-Care (POC) Assay for Prostate-Specific Antigen (PSA) Detection in Human Serum. SENSORS 2018; 18:s18113834. [PMID: 30413115 PMCID: PMC6264089 DOI: 10.3390/s18113834] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 11/02/2018] [Accepted: 11/06/2018] [Indexed: 12/16/2022]
Abstract
Prostate-specific antigen (PSA) is the established routine screening tool for the detection of early-stage prostate cancer. Given the laboratory-centric nature of the process, the development of a portable, ultra rapid high-throughput system for PSA screening is highly desirable. In this study, an advancedpoint-of-care system for PSA detection in human serum was developed based on a cellular biosensor where the cell membrane was modified by electroinserting a specific antibody against PSA. Thirty nine human serum samples were used for validation of this biosensory system for PSA detection. Samples were analyzed in parallel with a standard immunoradiometric assay (IRMA) and an established electrochemical immunoassay was used for comparison purposes. They were classified in three different PSA concentration ranges (0, <4 and ≥4 ng/mL). Cells membrane-engineered with 0.25 μg/mL anti-PSA antibody demonstrated a statistically lower response against the upper (≥4 ng/mL) PSA concentration range. In addition, the cell-based biosensor performed better than the immunosensor in terms of sensitivity and resolution against positive samples containing <4 ng/mL PSA. In spite of its preliminary, proof-of-concept stage of development, the cell-based biosensor could be used as aninitiative for the development of a fast, low-cost, and high-throughput POC screening system for PSA.
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Affiliation(s)
- Sophie Mavrikou
- Laboratory of Cell Technology, Faculty of Biotechnology, Agricultural University of Athens, Iera Odos 75, 11855Athens, Greece.
| | - Georgia Moschopoulou
- Laboratory of Cell Technology, Faculty of Biotechnology, Agricultural University of Athens, Iera Odos 75, 11855Athens, Greece.
| | | | | | - Georgios Giannakos
- Army Share Fund Hospital of Athens, Monis Petraki 10, 11521 Athens, Greece.
| | - Athanasios Skevis
- Laboratory of Cell Technology, Faculty of Biotechnology, Agricultural University of Athens, Iera Odos 75, 11855Athens, Greece.
| | - Spyridon Kintzios
- Laboratory of Cell Technology, Faculty of Biotechnology, Agricultural University of Athens, Iera Odos 75, 11855Athens, Greece.
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Zhang W, Dixon MB, Saint C, Teng KS, Furumai H. Electrochemical Biosensing of Algal Toxins in Water: The Current State-of-the-Art. ACS Sens 2018; 3:1233-1245. [PMID: 29974739 DOI: 10.1021/acssensors.8b00359] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Due to increasing stringency of water legislation and extreme consequences that failure to detect some contaminants in water can involve, there has been a strong interest in developing electrochemical biosensors for algal toxin detection during the past decade, evidenced by literature increasing from 2 journal papers pre-2009 to 24 between 2009 and 2018. In this context, this review has summarized recent progress of successful algal toxin detection in water using electrochemical biosensing techniques. Satisfactory detection recoveries using real environmental water samples and good sensor repeatability and reproducibility have been achieved, along with some excellent limit-of-detection (LOD) reported. Recent electrochemical biosensor literature in algal toxin detection is compared and discussed to cover three major design components: (1) biorecognition elements, (2) electrochemical read-out techniques, and (3) sensor electrodes and signal amplification strategy. The recent development of electrochemical biosensors has provided one more step further toward quick in situ detection of algal toxins in the contamination point of the water source. In the end, we have also critically reviewed the current challenges and research opportunities regarding electrochemical biosensors for algal toxin detection that need to be addressed before they attain commercial viability.
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Affiliation(s)
- Wei Zhang
- Research Centre for Water Environment Technology, Department of Urban Engineering, The University of Tokyo, Tokyo 113-0033, Japan
- School of Natural and Built Environments, University of South Australia, Mawson Lakes, South Australia 5095, Australia
- College of Engineering, Swansea University, Bay Campus, Swansea, Wales SA1 8EN, United Kingdom
| | | | - Christopher Saint
- School of Natural and Built Environments, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Kar Seng Teng
- College of Engineering, Swansea University, Bay Campus, Swansea, Wales SA1 8EN, United Kingdom
| | - Hiroaki Furumai
- Research Centre for Water Environment Technology, Department of Urban Engineering, The University of Tokyo, Tokyo 113-0033, Japan
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16
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Slight pH Fluctuations in the Gold Nanoparticle Synthesis Process Influence the Performance of the Citrate Reduction Method. SENSORS 2018; 18:s18072246. [PMID: 30002306 PMCID: PMC6068536 DOI: 10.3390/s18072246] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/04/2018] [Accepted: 07/05/2018] [Indexed: 12/20/2022]
Abstract
Gold nanoparticles (AuNPs) are currently under intense investigation for biomedical and biotechnology applications, thanks to their ease in preparation, stability, biocompatibility, multiple surface functionalities, and size-dependent optical properties. The most commonly used method for AuNP synthesis in aqueous solution is the reduction of tetrachloroauric acid (HAuCl4) with trisodium citrate. We have observed variations in the pH and in the concentration of the gold colloidal suspension synthesized under standard conditions, verifying a reduction in the reaction yield by around 46% from pH 5.3 (2.4 nM) to pH 4.7 (1.29 nM). Citrate-capped AuNPs were characterized by UV-visible spectroscopy, TEM, EDS, and zeta-potential measurements, revealing a linear correlation between pH and the concentration of the generated AuNPs. This result can be attributed to the adverse effect of protons both on citrate oxidation and on citrate adsorption onto the gold surface, which is required to form the stabilization layer. Overall, this study provides insight into the effect of the pH over the synthesis performance of the method, which would be of particular interest from the point of view of large-scale manufacturing processes.
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Label-Free Detection of Salivary Pepsin Using Gold Nanoparticle/Polypyrrole Nanocoral Modified Screen-Printed Electrode. SENSORS 2018; 18:s18061685. [PMID: 29882917 PMCID: PMC6021850 DOI: 10.3390/s18061685] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 05/12/2018] [Accepted: 05/21/2018] [Indexed: 11/17/2022]
Abstract
Detection of salivary pepsin has been given attention as a new diagnostic tool for laryngopharyngeal reflux (LPR) disease, because saliva collection is non-invasive and relatively comfortable. In this study, we prepared polypyrrole nanocorals (PPNCs) on a screen-printed carbon electrode (SPCE) by a soft template synthesis method, using β-naphthalenesulfonic acid (NSA) (for short, PPNCs/SPCE). Gold nanoparticles (GNPs) were then decorated on PPNCs/SPCE by electrodeposition (for short, GNP/PPNCs/SPCE). To construct the immunosensor, pepsin antibody was immobilized on GNP/PPNCs/SPCE. Next, citric acid was applied to prevent non-specific binding and change the electrode surface charge before pepsin incubation. Electrochemical stepwise characterization was performed using cyclic voltammetry, and immunosensor response toward different pepsin concentrations was measured by differential pulsed voltammetry. As a result, our electrochemical immunosensor showed a sensitive detection performance toward pepsin with a linear range from 6.25 to 100 ng/mL and high specificity toward pepsin, as well as a low limit of detection of 2.2 ng/mL. Finally, we quantified the pepsin levels in saliva samples of LPR patients (n = 2), showing that the results were concordant with those of a conventional ELISA method. Therefore, we expect that this electrochemical immunosensor could be helpful for preliminarily diagnosing LPR through the detection of pepsin in saliva.
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Rizwan M, Mohd-Naim NF, Ahmed MU. Trends and Advances in Electrochemiluminescence Nanobiosensors. SENSORS (BASEL, SWITZERLAND) 2018; 18:E166. [PMID: 29315277 PMCID: PMC5795924 DOI: 10.3390/s18010166] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 01/03/2018] [Accepted: 01/06/2018] [Indexed: 12/11/2022]
Abstract
The rapid and increasing use of the nanomaterials (NMs), nanostructured materials (NSMs), metal nanoclusters (MNCs) or nanocomposites (NCs) in the development of electrochemiluminescence (ECL) nanobiosensors is a significant area of study for its massive potential in the practical application of nanobiosensor fabrication. Recently, NMs or NSMs (such as AuNPs, AgNPs, Fe₃O₄, CdS QDs, OMCs, graphene, CNTs and fullerenes) or MNCs (such as Au, Ag, and Pt) or NCs of both metallic and non-metallic origin are being employed for various purposes in the construction of biosensors. In this review, we have selected recently published articles (from 2014-2017) on the current development and prospects of label-free or direct ECL nanobiosensors that incorporate NCs, NMs, NSMs or MNCs.
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Affiliation(s)
- Mohammad Rizwan
- Biosensors and Biotechnology Laboratory, Chemical Science Programme, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong BE 1410, Brunei Darussalam.
| | - Noor Faizah Mohd-Naim
- Biosensors and Biotechnology Laboratory, Chemical Science Programme, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong BE 1410, Brunei Darussalam.
- Institute of Health Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong BE 1410, Brunei Darussalam.
| | - Minhaz Uddin Ahmed
- Biosensors and Biotechnology Laboratory, Chemical Science Programme, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong BE 1410, Brunei Darussalam.
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Verma S, Verma V. Lithographic patterning of antibodies by direct lift-off and improved surface adhesion. Biofabrication 2017; 9:015012. [PMID: 28092639 DOI: 10.1088/1758-5090/9/1/015012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The inherent property of antibodies binding to their antigen with high specificity makes them a strong candidate for sensing and detection applications. Microscale patterning of antibodies is desired for the miniaturization of sensors and fundamental cell biology studies. However, existing methodologies to pattern antibodies at the microscale are multi-step. In this work, we demonstrate microscale patterning of antibodies on a glass coverslip in a single step photolithography process. The microscale features of the photoresist were generated on the coverslip using photolithography, and the antibody solution was incubated. Acetone lift-off of the antibody incubated photoresist, and subsequent washing by isopropanol (IPA), produced a micro-array of antibodies. The functionality of patterned primary antibody was confirmed using the corresponding antigen and strict controls. One of the striking features of this method of patterning is that the process steps and chemicals inherently improve the adhesion between the antibodies and glass without the need to functionalize the glass surface. We performed an ultrasonication test, detergent washing test, and Scotch tape test to show improved adhesion. Using appropriate controls, we show that the interaction taking place between the antibodies and the glass surface, after our process, is stronger than the simple physisorption taking place between the antibodies and the glass surface, without any treatment.
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Affiliation(s)
- Sankalp Verma
- Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, India
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Silva BV, Rodríguez BA, Sales GF, Sotomayor MDPT, Dutra RF. An ultrasensitive human cardiac troponin T graphene screen-printed electrode based on electropolymerized-molecularly imprinted conducting polymer. Biosens Bioelectron 2016; 77:978-85. [DOI: 10.1016/j.bios.2015.10.068] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 10/22/2015] [Accepted: 10/26/2015] [Indexed: 12/15/2022]
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