A rapid anti-Helicobacter pylori biofilm drug screening biosensor based on AlpB outer membrane protein and colloidal gold/nanoporous gold framework

• Published in: Biosensors & bioelectronics 2022-11, Vol.215, p.114599-114599, Article 114599
• Main Authors: Xiao, Sa, Shang, Keshuai, Zhang, Lei, Li, Wenjuan, Wang, Xia
• Format: Article
• Language: English
• Subjects: AlpB outer membrane protein; Biofilm; Helicobacter pylori; Rapid drug screening
• ISSN: 0956-5663; 1873-4235
• DOI: 10.1016/j.bios.2022.114599

Inhibition or disruption of biofilms has been recognized as an important means to eradicate Helicobacter pylori (H. pylori) infection. However, a fast and efficient drug screening method against H. pylori biofilms has not yet been established. Therefore, AlpB, an important outer membrane protein in H. pylori biofilm formation, was selected as a biological recognition element to screen anti-biofilm drugs in this study. A novel AlpB/colloidal gold (CG)/nanoporous gold (NPG)/Nafion-reduced graphene oxide (rGO)/glassy carbon electrode (GCE) biosensor was constructed based on the heterologous expression of AlpB. The prepared AlpB-based biosensor not only successfully identified six anti-biofilm drugs, but also evaluated the sensitivity and action intensity of different anti-biofilm drugs binding to AlpB by interaction kinetics analysis. The sensitivity order of AlpB to the six anti-biofilm drugs was: allicin > erythromycin > SCC > curcumin > rifampicin > NAC and the action intensity of the six anti-biofilm drugs on AlpB was: rifampicin > NAC > allicin > erythromycin > SCC > curcumin. In addition, molecular docking results showed that the six anti-biofilm drugs might exert their anti-biofilm effects by spontaneously binding to the conserved region of AlpB protein. This study provided a rapid screening platform and a unified data processing method for potential anti-biofilm drug development. •An anti-H. pylori biofilm drug screening biosensor was designed and constructed.•Several anti-H. pylori biofilm drugs were screened and evaluated using the biosensor.•The inhibition intensity of anti-biofilm drugs was calculated by kinetics model.•Molecular interactions of anti-biofilm drugs with AlpB protein were analyzed.