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Anusha T, Bhavani KS, Hassan RYA, Brahman PK. Ferrocene tagged primary antibody generates electrochemical signal: An electrochemical immunosensing platform for the monitoring of vitamin D deficiency in clinical samples. Int J Biol Macromol 2023; 239:124269. [PMID: 37003374 DOI: 10.1016/j.ijbiomac.2023.124269] [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: 01/10/2023] [Revised: 03/02/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
In this paper, a new kind of ultrasensitive and low-cost electrochemical immunosensing probe was designed to monitor vitamin D deficiency using 25(OH)D3 as a clinical biomarker. Ferrocene carbaldehyde conjugated on Ab-25(OH)D3 antibodies was used as an electrochemical probe for generating signals. The graphene nanoribbon-modified electrode (GNRs) was used to immobilize the (Ab-25(OH)D3-Fc) conjugate. The high electron transferability, greater surface area, and effective biocompatibility of GNRs enabled the capture of the greater number of primary antibodies (Ab-25(OH)D3). The developed probe was structurally and morphologically characterized. The step-wise modification was investigated by electrochemical techniques. The direct electrochemistry of ferrocene enabled 25(OH)D3 biomarker detection with excellent sensitivity. The reduction in peak current was proportional to the concentrations of 25(OH)D3 in the range of 1-100 ng mL-1 with a 0.1 ng mL-1 limit of detection. The probe was tested in terms of reproducibility, repeatability, and stability. Finally, the developed immunosensing probe was applied in serum samples for 25(OH)D3 quantification, and no significant difference was noticed in the assay results when compared with the standard chemiluminescent immunoassay (CLIA) method. The developed detection strategy has a wider scope for future potential clinical diagnostics applications.
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Affiliation(s)
- Tummala Anusha
- Electroanalytical Lab, Department of Chemistry, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur 522302, Andhra Pradesh, India; Chemsens Technologies PVT. LTD., Vijayawada 520013, Andhra Pradesh, India
| | - Kalli Sai Bhavani
- Electroanalytical Lab, Department of Chemistry, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur 522302, Andhra Pradesh, India
| | - Rabeay Y A Hassan
- Applied Organic Chemistry Department, National Research Centre (NRC), Dokki, Giza 12622, Egypt; Nanoscience Program, University of Science and Technology (UST), Zewail City of Science and Technology, 6th October City, Giza 12578, Egypt
| | - Pradeep Kumar Brahman
- Electroanalytical Lab, Department of Chemistry, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur 522302, Andhra Pradesh, India; Chemsens Technologies PVT. LTD., Vijayawada 520013, Andhra Pradesh, India.
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Kanso H, Ben Jrad A, Inguimbert N, Rammal W, Philouze C, Thomas F, Noguer T, Calas-Blanchard C. Synthesis and Characterization of Bis-1,2,3-Triazole Ligand and its Corresponding Copper Complex for the Development of Electrochemical Affinity Biosensors. Chemistry 2021; 27:9580-9588. [PMID: 33822403 DOI: 10.1002/chem.202100250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Indexed: 12/11/2022]
Abstract
The bis-triazole ligand and its corresponding copper complexes were synthesized and characterized for the first time and proposed as new labels for the development of electrochemical aptasensors. The bis-triazole ligand was prepared from methyl 1,6-heptadiyne-4-carboxylate and 2-(azidomethyl)phenol using classical CuAAC in presence of different copper salts. The X-ray structure of bis-triazole showed a symmetry center (C1). UV-Vis and X-band EPR spectra showed that the coordination capacity of the bis-triazole ligand was improved in the presence of triethylamine due to deprotonation of the triazole and phenolate moieties. After complexation with copper, the obtained complex was successfully attached to an anti-estradiol aptamer through thiol-maleimide coupling, and the resulting labelled aptamer was immobilized on a carbon screen-printed electrode by carbodiimide coupling. The electrochemical response of the resulting sensor was shown to decrease in the presence of estradiol, demonstrating that the developed complexes can be applied for the development of aptasensors.
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Affiliation(s)
- Hussein Kanso
- Biocapteurs-Analyses-Environnement, Université de Perpignan Via Domitia, 66860, Perpignan, France.,Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, F-66650, Banyuls-sur-Mer, France.,Faculté de Médecine Dentaire, Université Libanaise, Campus Rafic Hariri, Hadath, Liban
| | - Amani Ben Jrad
- Biocapteurs-Analyses-Environnement, Université de Perpignan Via Domitia, 66860, Perpignan, France.,Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, F-66650, Banyuls-sur-Mer, France
| | - Nicolas Inguimbert
- Centre de Recherche Insulaire et Observatoire de l'Environnement (CRIOBE), USR CNRS 3278, Université de Perpignan Via Domitia, Bâtiment T, 58 avenue P. Alduy, 66860, Perpignan, France
| | - Wassim Rammal
- Faculté des Sciences, Université Libanaise Section V, Nabatieh, Liban
| | - Christian Philouze
- Département de Chimie Moléculaire, UMR-5250 CNRS, Université de Grenoble Alpes, B.P. 53, 38041, Grenoble Cedex 9, France
| | - Fabrice Thomas
- Département de Chimie Moléculaire, UMR-5250 CNRS, Université de Grenoble Alpes, B.P. 53, 38041, Grenoble Cedex 9, France
| | - Thierry Noguer
- Biocapteurs-Analyses-Environnement, Université de Perpignan Via Domitia, 66860, Perpignan, France.,Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, F-66650, Banyuls-sur-Mer, France
| | - Carole Calas-Blanchard
- Biocapteurs-Analyses-Environnement, Université de Perpignan Via Domitia, 66860, Perpignan, France.,Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, F-66650, Banyuls-sur-Mer, France
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El-Moghazy AY, Huo J, Amaly N, Vasylieva N, Hammock BD, Sun G. An Innovative Nanobody-Based Electrochemical Immunosensor Using Decorated Nylon Nanofibers for Point-of-Care Monitoring of Human Exposure to Pyrethroid Insecticides. ACS APPLIED MATERIALS & INTERFACES 2020; 12:6159-6168. [PMID: 31927905 PMCID: PMC7799635 DOI: 10.1021/acsami.9b16193] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A novel ultrasensitive nanobody-based electrochemical immunoassay was prepared for assessing human exposure to pyrethroid insecticides. 3-Phenoxybenzoic acid (3-PBA) is a common human urinary metabolite for numerous pyrethroids, which broadly served as a biomarker for following the human exposure to this pesticide group. The 3-PBA detection was via a direct competition for binding to alkaline phosphatase-embedded nanobodies between free 3-PBA and a 3-PBA-bovine serum albumin conjugate covalently immobilized onto citric acid-decorated nylon nanofibers, which were incorporated on a screen-printed electrode (SPE). Electrochemical impedance spectroscopy (EIS) was utilized to support the advantage of the employment of nanofibrous membranes and the success of the immunosensor assembly. The coupling between the nanofiber and nanobody technologies provided an ultrasensitive and selective immunosensor for 3-PBA detection in the range of 0.8 to 1000 pg mL-1 with a detection limit of 0.64 pg mL-1. Moreover, when the test for 3-PBA was applied to real samples, the established immunosensor proved to be a viable alternative to the conventional methods for 3-PBA detection in human urine even without sample cleanup. It showed excellent properties and stability over time.
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Affiliation(s)
- Ahmed Y. El-Moghazy
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA
- Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City 21934, Alexandria, Egypt
| | - Jingqian Huo
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
- College of Plant Protection, Agricultural University of Hebei, Baoding 071001, P. R. China
| | - Noha Amaly
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA
- Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City 21934, Alexandria, Egypt
| | - Natalia Vasylieva
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Bruce D. Hammock
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Gang Sun
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA
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