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Prenylated Diresorcinols Inhibit Bacterial Quorum Sensing
Noemi D Paguigan1, José Rivera-Chávez1, Justin J Stempin1
1Department of Chemistry and Biochemistry , University of North Carolina at Greensboro , Greensboro , North Carolina 27402 , United States.
Journal of Natural Products
|February 8, 2019
Summary
Researchers discovered novel fungal metabolites that inhibit bacterial quorum sensing, offering a promising alternative to traditional antibiotics. These compounds show potential for developing new antivirulence therapies against drug-resistant bacteria like MRSA.
Area of Science:
- Natural Product Chemistry
- Microbiology
- Drug Discovery
Background:
- Antibiotic resistance is a growing threat, necessitating novel therapeutic strategies.
- Quorum sensing (QS) mechanisms regulate bacterial virulence and are potential targets for anti-infective agents.
- Disrupting QS is a promising antivirulence approach with lower resistance development potential.
Purpose of the Study:
- To identify fungal metabolites with quorum sensing inhibitory activity.
- To explore alternative anti-infective strategies beyond traditional antibiotics.
- To find new leads for developing antivirulence therapeutics.
Main Methods:
- Isolation and structural elucidation of fungal metabolites using HRESIMS and NMR.
- Confirmation of compound structure and absolute configuration via X-ray diffraction and computational methods.
- Evaluation of quorum sensing inhibition activity against a clinical isolate of methicillin-resistant Staphylococcus aureus (MRSA).
Main Results:
- Three new prenylated diresorcinols (1-3) and two known compounds were isolated from a freshwater fungus.
- Compounds 1-3 demonstrated significant quorum sensing inhibition in MRSA.
- Potent IC50 values ranging from 0.3 to 12.5 μM were observed for compounds 1-3.
Conclusions:
- The identified fungal metabolites are effective quorum sensing inhibitors.
- These compounds represent potential lead candidates for developing novel antivirulence therapies.
- This study highlights the potential of fungal natural products in combating antibiotic-resistant bacteria.
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