Triple-nanostructuring-based noninvasive electro-immune sensing of CagA toxin for Helicobacter pylori detection.

Autor: Jain U; Amity Institute of Nanotechnology, Amity University Uttar Pradesh (AUUP), Noida, India., Gupta S; Amity Institute of Nanotechnology, Amity University Uttar Pradesh (AUUP), Noida, India., Soni S; Amity Institute of Nanotechnology, Amity University Uttar Pradesh (AUUP), Noida, India., Khurana MP; Amity Institute of Nanotechnology, Amity University Uttar Pradesh (AUUP), Noida, India., Chauhan N; Amity Institute of Nanotechnology, Amity University Uttar Pradesh (AUUP), Noida, India.
Jazyk: angličtina
Zdroj: Helicobacter [Helicobacter] 2020 Aug; Vol. 25 (4), pp. e12706. Date of Electronic Publication: 2020 May 29.
DOI: 10.1111/hel.12706
Abstrakt: Background: Helicobacter pylori (H pylori) is gram-negative, spiral, and microaerophilic bacteria which can survive in ~2%-10% oxygen level. It was reported to populate in human gastric mucosa and leads to gastric cancer without any age or gender difference.
Materials and Methods: In this study, we are targeting label-free electrochemical immunosensor development for rapid H pylori detection after covalently immobilizing the antibody (CagA) over the nanomaterials modified Au electrode. Titanium oxide nanoparticles (TiO 2 NPs), carboxylated multi-walled carbon nanotubes (c-MWCNT), and conducting polymer polyindole carboxylic acid (Pin5COOH) composites (TiO 2 NPs/c-MWCNT/Pin5COOH) were synthesized and further utilized in immunosensor development as an electrochemical interface onto Au electrode. The stepwise modifications of CagAantibody/TiO 2 NPs/c-MWNCT/Pin5COOH/Au electrode were electrochemically studied.
Results: Possessing the unique features of advanced materials, the proposed immunosensor reported low sensing limit of 0.1 ng/mL in dynamic linear range of 0.1-8.0 ng/mL with higher stability and reproducibility. Furthermore, developed sensor-based determination of H pylori in five human stool specimens has shown good results with suitable accuracy.
Conclusions: This work lays strong foundation toward developing nanotechnology-enabled electrochemical sensor for ultrasensitive and early detection of H pylori in noninvasively collected clinical samples.
(© 2020 John Wiley & Sons Ltd.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje