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Targeting bacterial biofilms using vancomycin and multivalent cell-penetrating peptide labeled quantum dots
Munish Kumar1, Satish Kumar Pandey2, Alisha Lalhall3,4
1Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, India.
Journal of Biomedical Materials Research. Part B, Applied Biomaterials
|September 3, 2022
Summary
This study shows that vancomycin-loaded quantum dots, delivered by cell-penetrating peptides, effectively eradicate biofilms from both gram-positive and gram-negative bacteria, overcoming resistance.
Area of Science:
- Microbiology
- Nanotechnology
- Drug Delivery
Background:
- Bacterial biofilms present a significant challenge in healthcare due to their resilience and resistance to conventional antibiotics.
- Novel strategies are crucial for developing effective treatments against persistent bacterial infections.
- Targeted delivery systems are needed to enhance antimicrobial efficacy and overcome resistance mechanisms.
Purpose of the Study:
- To evaluate the antibiofilm efficacy of vancomycin-loaded quantum dots functionalized with cell-penetrating peptides.
- To investigate the conjugate's activity against both gram-positive and gram-negative bacterial strains.
- To assess the potential of this nanoconjugate in overcoming bacterial resistance and eradicating biofilms.
Main Methods:
- Synthesis and characterization of vancomycin-functionalized quantum dots conjugated with cell-penetrating peptides using techniques like fluorimetry, UV-visible spectroscopy, gel electrophoresis, and zeta potential analysis.
- In vitro testing of the nanoconjugate's antimicrobial activity against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli.
- Assessment of the nanoconjugate's antibiofilm efficacy against the selected bacterial strains.
Main Results:
- The vancomycin-quantum dot-peptide conjugate exhibited significant antimicrobial activity against all tested bacterial strains.
- The nanoconjugate demonstrated potent antibiofilm activity, effectively eradicating established biofilms.
- Characterization confirmed the successful synthesis and stability of the functionalized quantum dot conjugate.
Conclusions:
- Cell-penetrating peptide-mediated targeted delivery of vancomycin-functionalized quantum dots is a promising strategy for combating bacterial biofilms.
- This approach effectively overcomes bacterial resistance and eradicates biofilms at low concentrations.
- The developed nanoconjugate holds potential for novel therapeutic applications against biofilm-related infections.
