Journal
FRONTIERS IN MICROBIOLOGY
Volume 8, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2017.00496
Keywords
biofilm; Staphylococcus aureus; natural products; ellagic acid; Rubus ulmifolius
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Funding
- Georgia Research Alliance [GRA.VL 13.C7, CQ]
- Emory University (EW and CQ)
- Scholarly Inquiry and Research at Emory Program (PJ)
- NIH Maximizing Access to Research Careers Program (JG-R)
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Staphylococcus aureus is a leading cause of hospital-acquired infections. It is listed among the top '' serious threats '' to human health in the USA, due in large part to rising rates of resistance. Many S. aureus infections are recalcitrant to antibiotic therapy due to their ability to form a biofilm, which acts not only as a physical barrier to antibiotics and the immune system, but results in differences in metabolism that further restricts antibiotic efficacy. Development of a modular strategy to synthesize a library of phenolic glycosides allowed for bioactivity testing and identification of anti-biofilm compounds within an extract of the elmleaf blackberry (Rubus ulmifolius). Two ellagic acid (EA) derivatives, EA xyloside and EA rhamnoside, have been identified as components of the Rubus extract. In addition, EA rhamnoside has been identified as an inhibitor of biofilm formation, with activity comparable to the complex extract 220D- F2 (composed of a mixture of EA glycosides), and confirmed by confocal laser scanning microscopy analyses.
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