Nanohybrid-based immunosensor prepared for Helicobacter pylori BabA antigen detection through immobilized antibody assembly with @ Pdnano/rGO/PEDOT sensing platform
| Autor: | Bayu Tri Murti, Shaivya Gupta, Ashutosh Tiwari, Athika Darumas Putri, Utkarsh Jain, Nidhi Chauhan |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Polymers Metal Nanoparticles 02 engineering and technology Electrochemistry Article Antibodies law.invention Nanomaterials 03 medical and health sciences Adsorption PEDOT:PSS Microscopy Electron Transmission law Nanoscience and technology Adhesins Bacterial Electrodes Cancer Immunoassay Antigens Bacterial Multidisciplinary biology Helicobacter pylori Chemistry Graphene Biological techniques Gastroenterology Health care Temperature Electrochemical Techniques Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology biology.organism_classification Bridged Bicyclo Compounds Heterocyclic Combinatorial chemistry Materials science Computational biology and bioinformatics Nanostructures Molecular Docking Simulation 030104 developmental biology Linear range Electrode Microscopy Electron Scanning Graphite Gold 0210 nano-technology Palladium |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | The gastric colonization of human hosts by Helicobacter pylori (H. pylori) increases the risk of developing gastritis, ulcers and gastric cancer. To detect H. pylori, a nanohybrid-based BabA immunosensor is developed herein. BabA is an outer membrane protein and one of the major virulence factors of H. pylori. To design the immunosensor, an Au electrode is loaded with palladium nanoparticles (Pdnano) by electrodeposition to generate reduced graphene oxide (rGO)/poly(3,4-ethylenedioxythiophene) (PEDOT). The immobilization of these nanostructured materials imparts a large surface area and electroconductivity to bio-immune-sensing molecules (here, the BabA antigen and antibodies). After optimization, the fabricated immunosensor has the ability to detect antigens (H. pylori) in a linear range from 0.2 to 20 ng/mL with a low LOD (0.2 ng/mL). The developed immunosensor is highly specific, sensitive and reproducible. Additionally, in silico methods were employed to better understand the hybrid nanomaterials of the fabricated Pdnano/rGO/PEDOT/Au electrode. Simulations performed by molecular docking, and Metropolis Monte Carlo adsorption studies were conducted. The results revealed that the hybrid nanomaterials exhibit a stable antigen–antibody complex of BabA, yielding the lowest binding energy in relation to the electrode materials, emphasizing the functionality of the constructed electrodes in the electrochemical immunosensor. |
| Databáze: | OpenAIRE |
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