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Updated: Oct 23, 2025
Visualization of Bacterial Resistance using Fluorescent Antibiotic Probes
Published on: March 2, 2020
Selectively Targeting and Differentiating Vancomycin-Resistant Staphylococcus aureus via Dual Synthetic Fluorescent
Tsung-Shing Andrew Wang1, Pin-Lung Chen1, Yi-Chen Sarah Chen1
1Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan (R.O.C.).
Abstract:
Many Staphylococcus bacteria are pathogenic and harmful to humans. Noticeably, some Staphylococcus, including vancomycin-resistant S. aureus (VRSA), have become notoriously resistant to antibiotics and have spread rapidly, becoming threats to public health. Here, we designed a dual fluorescent probe scheme combining siderophores and antibiotics as the guiding units to selectively target VRSA and vancomycin-sensitive S. aureus (VSSA) in complex bacterial samples. Siderophore-mediated iron uptake is the key pathway by which S. aureus acquires iron in limited environments. Therefore, the siderophore-derivative probe could differentiate between S. aureus and other bacteria. Moreover, by fine-tuning the vancomycin-derivative probes, we could selectively target only VSSA, further differentiating VRSA and VSSA. Finally, by combining the siderophore-derivative probe and the vancomycin-derivative probe, we successfully targeted and differentiated between VRSA and VSSA in complicated bacterial mixtures.
Insights
Researchers developed a dual fluorescent probe to distinguish between antibiotic-resistant and sensitive Staphylococcus aureus strains. This innovation aids in identifying and differentiating these public health threats in complex samples.
Area of Science:
- Microbiology and Infectious Diseases
- Biotechnology and Biosensing
- Drug Resistance Mechanisms
Background:
- Certain Staphylococcus bacteria, including vancomycin-resistant Staphylococcus aureus (VRSA), pose significant public health risks due to widespread antibiotic resistance.
- Rapid spread of resistant strains necessitates advanced diagnostic tools for accurate identification and differentiation in clinical settings.
- Staphylococcus aureus utilizes siderophore-mediated iron uptake as a crucial pathway for survival in iron-limited environments.
Purpose of the Study:
- To design and implement a novel dual fluorescent probe system for the selective targeting of vancomycin-resistant Staphylococcus aureus (VRSA) and vancomycin-sensitive Staphylococcus aureus (VSSA).
- To differentiate between VRSA and VSSA within complex bacterial mixtures.
- To leverage siderophore and antibiotic derivatives for precise bacterial identification and strain differentiation.
Main Methods:
- Development of a dual fluorescent probe scheme incorporating siderophore derivatives for bacterial targeting.
- Design of vancomycin-derivative probes, fine-tuned for selective binding to VSSA.
- Integration of both probe types to achieve simultaneous differentiation of VRSA and VSSA in mixed bacterial samples.
Main Results:
- Siderophore-derivative probes successfully differentiated Staphylococcus aureus from other bacterial species.
- Vancomycin-derivative probes enabled selective targeting of VSSA, distinguishing it from VRSA.
- The combined dual fluorescent probe system effectively targeted and differentiated VRSA and VSSA in complex bacterial mixtures.
Conclusions:
- The developed dual fluorescent probe system offers a promising method for the selective detection and differentiation of VRSA and VSSA.
- This approach enhances diagnostic capabilities for antibiotic-resistant bacterial infections.
- The strategy of combining pathogen-specific uptake pathways (siderophores) with antibiotic derivatives provides a versatile platform for bacterial strain identification.
