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Algethami FK, Rabti A, Mastouri M, Ben Aoun S, Alqarni LS, Elamin MR, Raouafi N. Sub-femtomolar capacitance-based biosensing of kanamycin using screen-printed electrodes coated with redox-active polymeric films. Mikrochim Acta 2023; 190:434. [PMID: 37821740 DOI: 10.1007/s00604-023-06003-7] [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: 08/15/2023] [Accepted: 09/16/2023] [Indexed: 10/13/2023]
Abstract
An ultrasensitive capacitance-based biosensor has been developed capable of detecting the kanamycin (KAN) antibiotic at sub-femtomolar levels. The biosensor was constructed using a potential-pulse-assisted method, allowing for the layer-by-layer deposition of a melanin-like polymeric film (MLPF) on an electrode surface modified with gold nanoparticles (AuNPs). The MLPF was formed through the electrochemical polymerization of dopamine and the specific kanamycin aptamer. By optimizing the operating parameters, we achieved a label-free detection of kanamycin by monitoring the variation of pseudocapacitive properties of the MLPF-modified electrode using electrochemical impedance spectroscopy. The developed biosensor demonstrated a wide linear response ranging from 1 fM to 100 pM, with a remarkable limit of detection of 0.3 fM (S/N = 3) for kanamycin. Furthermore, the biosensor was successfully applied to detect kanamycin in milk samples, exhibiting good recovery. These findings highlight the promising potential of the aptasensor for determination of antibiotic residues and ensuring food safety. In conclusion, our ultrasensitive capacitance-based biosensor provides a reliable and efficient method for detecting trace amounts of kanamycin in dairy products. This technology can contribute to safeguarding consumer health and maintaining high food safety standards.
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Affiliation(s)
- Faisal K Algethami
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), P.O. Box 90950, 11623, Riyadh, Saudi Arabia.
| | - Amal Rabti
- Laboratory of Materials, Treatment, and Analysis (LMTA), National Institute of Research and Physicochemical Analysis (INRAP), Biotechpole Sidi Thabet, 2020, Sidi Thabet, Tunisia
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia
| | - Mohamed Mastouri
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia
| | - Sami Ben Aoun
- Department of Chemistry, Faculty of Science, Taibah University, P.O Box 30002, Al-Madinah Al-Munawwarah, Saudi Arabia
| | - Laila S Alqarni
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), P.O. Box 90950, 11623, Riyadh, Saudi Arabia
| | - Mohamed R Elamin
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), P.O. Box 90950, 11623, Riyadh, Saudi Arabia
| | - Noureddine Raouafi
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia.
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Algethami FK, Rabti A, Mastouri M, Abdulkhair BY, Ben Aoun S, Raouafi N. Highly sensitive capacitance-based nitrite sensing using polydopamine/AuNPs-modified screen-printed carbon electrode. RSC Adv 2023; 13:21336-21344. [PMID: 37465569 PMCID: PMC10350640 DOI: 10.1039/d3ra03898j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 07/10/2023] [Indexed: 07/20/2023] Open
Abstract
Regulatory bodies play a crucial role in establishing limits for food additives to ensure food quality and safety of food products, as excessive usage poses risks to consumers. In the context of processed animal-based foodstuffs, nitrite is commonly utilized as a means to slow down bacterial degradation. In this study, we have successfully leveraged the redox activity of an electrochemically deposited polydopamine (pDA) film onto gold nanoparticle (AuNP)-modified screen-printed electrodes (SPCE) to develop a sensitive and versatile methodology for the detection of nitrite using redox capacitance spectroscopy. By exploiting the interaction of the AuNPs/pDA electroactive interface with the target nitrite ions, we observed distinct changes in the redox distribution, subsequently leading to modifications in the associated redox capacitance. This alteration enables the successful detection of nitrite, exhibiting a linear response within the concentration range of 10 to 500 μM, with a limit of detection of 1.98 μM (S/N = 3). Furthermore, we applied the developed sensor to analyze nitrite levels in processed meats, yielding good recoveries. These results demonstrate the potential of our approach as a promising method for routine detection of ions.
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Affiliation(s)
- Faisal K Algethami
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU) P.O. Box 90950 Riyadh 11623 Saudi Arabia @imamu.edu.sa
| | - Amal Rabti
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), Department of Chemistry, Faculty of Science, University of Tunis El Manar Tunis El Manar 2092 Tunis Tunisia
- National Institute of Research and Physicochemical Analysis (INRAP), Laboratory of Materials, Treatment, and Analysis (LMTA), Biotechpole Sidi Thabet 2020 Sidi Thabet Tunisia
| | - Mohamed Mastouri
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), Department of Chemistry, Faculty of Science, University of Tunis El Manar Tunis El Manar 2092 Tunis Tunisia
| | - Babiker Y Abdulkhair
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU) P.O. Box 90950 Riyadh 11623 Saudi Arabia @imamu.edu.sa
| | - Sami Ben Aoun
- Department of Chemistry, Faculty of Science, Taibah University P.O. Box 30002 Al-Madinah Al-Munawwarah Saudi Arabia
| | - Noureddine Raouafi
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), Department of Chemistry, Faculty of Science, University of Tunis El Manar Tunis El Manar 2092 Tunis Tunisia
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Algethami FK, Rabti A, Mastouri M, Ben Aoun S, Abdulkhair BY, Raouafi N. In silico selection of an aptamer for the design of aptamer-modified magnetic beads bearing ferrocene co-immobilized label for capacitive detection of acetamiprid. Talanta 2023; 258:124445. [PMID: 36924636 DOI: 10.1016/j.talanta.2023.124445] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/04/2023] [Accepted: 03/09/2023] [Indexed: 03/12/2023]
Abstract
In silico evaluation of aptamer/target interactions can facilitate the development of efficient biosensor with high specificity and affinity. In this work, we present in silico, i.e. structural similarity, molecular docking and molecular dynamics selection of the aptamer with sufficient binding properties for acetamiprid (ACE), a nicotine-like pesticide, and its use to design aptamer-modified magnetic beads bearing ferrocene co-immobilized label for capacitive detection of ACE. Taking advantages of the aptamer higher stability and binding affinity, the specific properties of magnetic beads and the redox properties of ferrocene moiety, the developed aptasensor showed promising analytical performances for ACE detection, using electrochemical capacitance spectroscopy, with a linear response ranging from 1 fM to 100 pM and a limit of detection of 0.94 fM (S/N = 3). Furthermore, it was successfully applied to detect ACE in fortified tomatoes samples, proving a promising approach for routine detection of pesticide in real agricultural samples.
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Affiliation(s)
- Faisal K Algethami
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University, P.O. Box 90950, Riyadh, 11623, Saudi Arabia.
| | - Amal Rabti
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia
| | - Mohamed Mastouri
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia
| | - Sami Ben Aoun
- Department of Chemistry, Faculty of Science, Taibah University, P.O Box 30002, Al-Madinah Al-Munawwarah, Saudi Arabia
| | - Babiker Y Abdulkhair
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University, P.O. Box 90950, Riyadh, 11623, Saudi Arabia
| | - Noureddine Raouafi
- Sensors and Biosensors Group, Analytical Chemistry and Electrochemistry Lab (LR99ES15), University of Tunis El Manar, Tunis El Manar, 2092, Tunis, Tunisia.
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Wang H, Boghossian AA. Covalent conjugation of proteins onto fluorescent single-walled carbon nanotubes for biological and medical applications. MATERIALS ADVANCES 2023; 4:823-834. [PMID: 36761250 PMCID: PMC9900427 DOI: 10.1039/d2ma00714b] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 11/02/2022] [Indexed: 05/20/2023]
Abstract
Single-walled carbon nanotubes (SWCNTs) have optical properties that are conducive for biological applications such as sensing, delivery, and imaging. These applications necessitate the immobilization of macromolecules that can serve as therapeutic drugs, molecular templates, or modulators of surface interactions. Although previous studies have focused on non-covalent immobilization strategies, recent advances have introduced covalent functional handles that can preserve or even enhance the SWCNT optical properties. This review presents an overview of covalent sidewall modifications of SWCNTs, with a focus on the latest generation of "sp3 defect" modifications. We summarize and compare the reaction conditions and the reported products of these sp3 chemistries. We further review the underlying photophysics governing SWCNT fluorescence and apply these principles to the fluorescence emitted from these covalently modified SWCNTs. Finally, we provide an outlook on additional chemistries that could be applied to covalently conjugate proteins to these chemically modified, fluorescent SWCNTs. We review the advantages of these approaches, emerging opportunities for further improvement, as well as their implications for enabling new technologies.
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Affiliation(s)
- Hanxuan Wang
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Sciences and Engineering CH-1015 Lausanne Switzerland
| | - Ardemis A Boghossian
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Sciences and Engineering CH-1015 Lausanne Switzerland
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Liu R, Zhang F, Shi M, Sang Y, Wang X. In vitro selection and optimization of high-affinity aptamer for milk allergen α-lactalbumin and its application in dual-mode detection. Front Nutr 2022; 9:1005230. [PMID: 36267907 PMCID: PMC9577226 DOI: 10.3389/fnut.2022.1005230] [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: 07/28/2022] [Accepted: 09/14/2022] [Indexed: 11/13/2022] Open
Abstract
Milk is one of the most common sources of protein in people’s daily lives, and it is also recognized by the World Health Organization (WHO) as one of the eight categories of food allergies to human beings. α-lactalbumin (α-La) is the main cause of milk allergy. In this study, a single-stranded DNA aptamer with high binding affinity to α-La were selected using systematic evolution of ligands by exponential enrichment (SELEX) method. Compared with the full-length sequence, the binding affinity of the truncated aptamer LA-1t for α-La was increased six times using fluorescence analysis. Circular dichroism (CD) indicated that the secondary structure of LA-1t contained a typical hairpin structure. Through the docking simulation of LA-1t and α-La, these experimental results were further explained theoretically, and the recognition mechanism was explained. Finally, the colorimetric and fluorescence signal of boron nitride quantum dots anchored to porous CeO2 nanorods (BNQDs/CeO2) were modulated by FAM-labeled LA-1t to achieve highly selective and sensitive determination of α-La. This dual-mode sensing strategy displayed sensitive recognition for α-La in a linear range of 5–4,000 ng/ml with the LOD was 3.32 ng/ml (colorimetry) and 0.71 ng/ml (fluorescence), respectively. Simultaneously, the colorimetry/fluorescence dual-mode sensing strategy was applied for detecting α-La in spiked real samples and demonstrated good stability and reliability.
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Sandwich-Based Immunosensor for Dual-Mode Detection of Pathogenic F17-Positive Escherichia coli Strains. Int J Mol Sci 2022; 23:ijms23116028. [PMID: 35682707 PMCID: PMC9181454 DOI: 10.3390/ijms23116028] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/11/2022] [Accepted: 05/17/2022] [Indexed: 11/17/2022] Open
Abstract
Bacterial diseases cause tremendous economic losses due to high morbidity and mortality in livestock animals. F17A protein, the major subunit of F17 fimbriae, is one of the most prevalent and crucial virulence factors among the pathogenic Escherichia coli (E. coli) isolated from diarrheic and septicemic animals of various species. Purification and detection of this protein is regarded as an interesting field of investigation due to its important role as a therapeutic target, such as vaccines, and as a diagnostic tool. In this context, polyclonal rabbit antibodies recognizing F17A protein (anti−F17A antibody) were developed and used for its detection. In fact, sandwich biosensor using anti−F17A/gold nanoparticles conjugates as capture probe and anti−F17A antibody labelled with horseradish peroxidase as signal amplification probe was developed for electrochemical and fluorescent detection of purified F17A protein and live F17–positive E. coli bacteria. Good specificity and sensitivity for detection of F17–positive E. coli strains were obtained. The dynamic range for the biosensor varies from 1 × 102 to 1 × 109 CFU·mL−1 (R2 = 0.998) and the detection limit (LOD) and the IC50 value were estimated to be 37 CFU·mL−1 and 75 CFU·mL−1, respectively.
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Song K, Chen W. An electrochemical sensor for high sensitive determination of lysozyme based on the aptamer competition approach. OPEN CHEM 2021. [DOI: 10.1515/chem-2021-0026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Protein is a kind of basic substance that constitutes a life body. The determination of protein is very important for the research of biology, medicine, and other fields. Lysozyme is relatively small and simple in structure among all kinds of proteins, so it is often used as a standard target detector in the study of aptamer sensor for protein detection. In this paper, a lysozyme electrochemical sensor based on aptamer competition mechanism is proposed. We have successfully prepared a signal weakening electrochemical sensor based on the lysozyme aptamer competition mechanism. The carboxylated multi-walled carbon nanotubes (MWCNTs) were modified on the glassy carbon electrode, and the complementary aptamer DNA with amino group was connected to MWCNTs. Because of the complementary DNA of daunomycin into the electrode, the electrochemical signal is generated. When there is a target, the aptamer binds to lysozyme with higher binding power, and the original complementary chain breaks down, resulting in the loss of daunomycin inserted into the double chain and the weakening of electrochemical signal. Differential pulse voltammetry was used to determine lysozyme, the response range was 1–500 nM, the correlation coefficient was 0.9995, and the detection limit was 0.5 nM. In addition, the proposed sensor has good selectivity and anti-interference.
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Affiliation(s)
- Kai Song
- School of Drug and Food, Xuzhou Vocational College of Bioengineering , Xuzhou 221006 , China
| | - Wenwu Chen
- School of Drug and Food, Xuzhou Vocational College of Bioengineering , Xuzhou 221006 , China
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Dopierała K, Krajewska M, Prochaska K. Study on pH-Dependent interactions of linoleic acid with α-lactalbumin. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Pourghobadi R, Nematollahi D, Baezzat MR, Alizadeh S, Goljani H. Electropolymerization of catechol on wireless graphite electrode. Unusual cathodic polycatechol formation. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114180] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Mars A, Ben jaafar S, Gaied ABAE, Raouafi N. Electrochemical immunoassay for lactalbumin based on the use of ferrocene-modified gold nanoparticles and lysozyme-modified magnetic beads. Mikrochim Acta 2018; 185:449. [DOI: 10.1007/s00604-018-2986-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 08/29/2018] [Indexed: 11/27/2022]
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