Related Experiment Video
Updated: Nov 16, 2025
A Platform of Anti-biofilm Assays Suited to the Exploration of Natural Compound Libraries
Published on: December 27, 2016
Antibiofilm Activity of Small-Molecule ZY-214-4 Against Staphylococcus aureus
Jingyi Yu1, Lulin Rao1, Lingling Zhan1
1Department of Laboratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.
Abstract:
Staphylococcus aureus is the most important pathogenic bacteria in humans. As the resistance of S. aureus to existing antibiotics is increasing, there is an urgent need for new anti-infective drugs. S. aureus biofilms cause persistent infections and resist complete eradication with antibiotic therapy. The present study investigated the inhibitory effect of the novel small-molecule ZY-214-4 (C1 9H1 1BrNO4) on S. aureus biofilm formation. At a subinhibitory concentration (4 μg/ml), ZY-214-4 had no effect on the growth of S. aureus strains and also showed no cytotoxicity in human normal bronchial epithelial cells (Bease-2B). The results of a semi-quantitative biofilm test showed that ZY-214-4 prevented S. aureus biofilm formation, which was confirmed by scanning electron microscopy and confocal laser scanning microscopy. ZY-214-4 significantly suppressed the production of polysaccharide intercellular adhesion and prevented cell aggregation, and also inhibited the mRNA expression of icaA and other biofilm-related genes (eno, clfA/B, fnbB, fib, ebpS, psmα, and psmβ) in clinical S. aureus isolates. Thus, at a subinhibitory concentration, ZY-214-4 inhibits biofilm formation by preventing cell aggregation, highlighting its clinical potential for preventing or treating S. aureus infections.
Insights
The novel small-molecule ZY-214-4 effectively inhibits Staphylococcus aureus biofilm formation at subinhibitory concentrations. This compound prevents bacterial cell aggregation and reduces the expression of key biofilm genes, offering potential for new anti-infective therapies.
Area of Science:
- Microbiology
- Pharmacology
- Infectious Diseases
Background:
- Staphylococcus aureus is a major human pathogen with increasing antibiotic resistance.
- S. aureus biofilms are associated with persistent infections and are difficult to eradicate with antibiotics.
Purpose of the Study:
- To investigate the inhibitory effect of the novel small-molecule ZY-214-4 on Staphylococcus aureus biofilm formation.
- To assess the safety and efficacy of ZY-214-4 at subinhibitory concentrations.
Main Methods:
- ZY-214-4 was tested at a subinhibitory concentration (4 μg/ml) for its effect on S. aureus growth and cytotoxicity.
- Biofilm formation was assessed using semi-quantitative assays, scanning electron microscopy, and confocal laser scanning microscopy.
- The impact of ZY-214-4 on polysaccharide intercellular adhesion and the mRNA expression of biofilm-related genes was analyzed.
Main Results:
- ZY-214-4 showed no inhibitory effect on S. aureus growth or cytotoxicity in human bronchial epithelial cells.
- ZY-214-4 significantly prevented S. aureus biofilm formation.
- The compound suppressed polysaccharide intercellular adhesion, prevented cell aggregation, and inhibited key biofilm-related genes (icaA, eno, clfA/B, fnbB, fib, ebpS, psmα, psmβ).
Conclusions:
- ZY-214-4 effectively inhibits Staphylococcus aureus biofilm formation at subinhibitory concentrations by preventing cell aggregation.
- This novel small-molecule demonstrates significant clinical potential for preventing or treating S. aureus infections, particularly those involving biofilms.
More Related Videos
10:00Targeting Biofilm Associated Staphylococcus aureus Using Resazurin Based Drug-susceptibility Assay
Published on: May 5, 2016
06:36Improved Enzyme Protection Assay to Study Staphylococcus aureus Internalization and Intracellular Efficacy of Antimicrobial Compounds
Published on: September 8, 2021
Related Concept Videos
01:28Antimicrobial Effectiveness
01:29Biofilms