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Wang H, Fan Y, Yang Q, Sun X, Liu H, Chen W, Aziz A, Wang S. Boosting the Electrochemical Performance of PI-5-CA/C-SWCNT Nanohybrid for Sensitive Detection of E. coli O157:H7 From the Real Sample. Front Chem 2022; 10:843859. [PMID: 35223774 PMCID: PMC8866332 DOI: 10.3389/fchem.2022.843859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 01/17/2022] [Indexed: 01/04/2023] Open
Abstract
Redox activity is an important indicator for evaluating electrochemical biosensors. In this work, we have successfully polymerized indole-5-carboxylic acid into poly-5-carboxyindole nanomaterials (PI-5-CA), using its superior redox activity, and introduced carboxylated single-walled carbon nanotubes (C-SWCNTs) to synthesize a composite material. Finally, a synthesized composite material was used for the modification of the glass carbon electrode to fabricate the PI-5-CA/C-SWCNTs/GCE-based immunosensor and was successfully applied for the sensitive detection of E. coli O157:H7. The fabricated immunosensor exhibited an outstanding electrocatalytic activity toward the detection of E. coli O157:H7 with a remarkably lowest limit of detection (2.5 CFU/ml, LOD = 3 SD/k, n = 3) and has a wide linear range from 2.98×101 to 2.98×107 CFU/ml. Inspired from the excellent results, the fabricated electrode was applied for the detection of bacteria from real samples (water samples) with a good recovery rate (98.13–107.69%) as well as an excellent stability and specificity. Owing to its simple preparation, excellent performance, and detection time within 30 min, our proposed immunosensor will open a new horizon in different fields for the sensitive detection of bacteria from real samples.
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Affiliation(s)
- Huan Wang
- Advanced Biomaterials and Tissue Engineering Center, College of Life Science and Technology, Huazhong University of Life Science and Technology, Wuhan, China
| | - Yanmiao Fan
- School of Chemical Science and Engineering Fiber and Polymer Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Qiaoli Yang
- Advanced Biomaterials and Tissue Engineering Center, College of Life Science and Technology, Huazhong University of Life Science and Technology, Wuhan, China
| | - Xiaoyu Sun
- Advanced Biomaterials and Tissue Engineering Center, College of Life Science and Technology, Huazhong University of Life Science and Technology, Wuhan, China
| | - Hao Liu
- Advanced Biomaterials and Tissue Engineering Center, College of Life Science and Technology, Huazhong University of Life Science and Technology, Wuhan, China
| | - Wei Chen
- Advanced Biomaterials and Tissue Engineering Center, College of Life Science and Technology, Huazhong University of Life Science and Technology, Wuhan, China
| | - Ayesha Aziz
- Advanced Biomaterials and Tissue Engineering Center, College of Life Science and Technology, Huazhong University of Life Science and Technology, Wuhan, China
- *Correspondence: Ayesha Aziz, ; Shenqi Wang,
| | - Shenqi Wang
- Advanced Biomaterials and Tissue Engineering Center, College of Life Science and Technology, Huazhong University of Life Science and Technology, Wuhan, China
- *Correspondence: Ayesha Aziz, ; Shenqi Wang,
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Daugulis AJ. A survey of bioengineering research in Canada-2007. Biotechnol Prog 2009; 24:795-806. [PMID: 19194891 DOI: 10.1002/btpr.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Research activity in bioengineering at Canadian universities has been surveyed. Details were provided by chemical engineering departments in response to a common request for information on activities by individual researchers and for key publications. The information provided has been grouped by topics within the broad theme of "Bioengineering," and contributions from individual departments have been summarized within these topics. Although many aspects of bioengineering research are being pursued in Canada, it would appear as though environmental biotechnology, biomaterials, and tissue/cell culture are the most active areas under investigation.
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Affiliation(s)
- Andrew J Daugulis
- Dept. of Chemical Engineering, Queen's University, Kingston, ON, Canada K7L 3N6.
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Boi C. Membrane adsorbers as purification tools for monoclonal antibody purification. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 848:19-27. [PMID: 16996324 DOI: 10.1016/j.jchromb.2006.08.044] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2006] [Revised: 08/10/2006] [Accepted: 08/22/2006] [Indexed: 11/20/2022]
Abstract
Downstream purification processes for monoclonal antibody production typically involve multiple steps; some of them are conventionally performed by bead-based column chromatography. Affinity chromatography with Protein A is the most selective method for protein purification and is conventionally used for the initial capturing step to facilitate rapid volume reduction as well as separation of the antibody. However, conventional affinity chromatography has some limitations that are inherent with the method, it exhibits slow intraparticle diffusion and high pressure drop within the column. Membrane-based separation processes can be used in order to overcome these mass transfer limitations. The ligand is immobilized in the membrane pores and the convective flow brings the solute molecules very close to the ligand and hence minimizes the diffusional limitations associated with the beads. Nonetheless, the adoption of this technology has been slow because membrane chromatography has been limited by a lower binding capacity than that of conventional columns, even though the high flux advantages provided by membrane adsorbers would lead to higher productivity. This review considers the use of membrane adsorbers as an alternative technology for capture and polishing steps for the purification of monoclonal antibodies. Promising industrial applications as well as new trends in research will be addressed.
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Affiliation(s)
- Cristiana Boi
- Dipartimento di Ingegneria Chimica, Mineraria e delle Tecnologie Ambientali, Università degli Studi di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy.
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