Resveratrol and Resveratrol-Loaded Galactosylated Liposomes: Anti-Adherence and Cell Wall Damage Effects on Staphylococcus aureus and MRSA

• Published in: Biomolecules (Basel, Switzerland) Vol. 13; no. 12; p. 1794
• Main Authors: Prevete, Giuliana, Simonis, Beatrice, Mazzonna, Marco, Mariani, Francesca, Donati, Enrica, Sennato, Simona, Ceccacci, Francesca, Bombelli, Cecilia
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 14-12-2023
• Subjects: Antibiotic resistance; Antibiotics; Bacteria; Bacteriostats; Bioavailability; biofilm; Biofilms; cationic liposomes; Cell cycle; Cell walls; Cholesterol; Drug resistance; galactosylated amphiphile; Investigations; Lipids; Liposomes; MRSA; Pathogens; Public health; Resveratrol; Staphylococcus aureus; Staphylococcus infections; trans-resveratrol; United States > US; Italy; anti-adherence effect; antimicrobial resistance; bacterial cell wall; MRSA; biofilm; cationic liposomes; anti-biofilm; trans-resveratrol; galactosylated amphiphile; Staphylococcus aureus
• ISSN: 2218-273X; 2218-273X
• DOI: 10.3390/biom13121794

Antibiotic resistance due to bacterial biofilm formation is a major global health concern that makes the search for new therapeutic approaches an urgent need. In this context,,
-resveratrol (RSV), a polyphenolic natural substance, seems to be a good candidate for preventing and eradicating biofilm-associated infections but its mechanism of action is poorly understood. In addition, RSV suffers from low bioavailability and chemical instability in the biological media that make its encapsulation in delivery systems necessary. In this work, the anti-biofilm activity of free RSV was investigated on
and, to highlight the possible mechanism of action, we studied the anti-adherence activity and also the cell wall damage on a MRSA strain. Free RSV activity was compared to that of RSV loaded in liposomes, specifically neutral liposomes (L = DOPC/Cholesterol) and cationic liposomes (LG = DOPC/Chol/GLT1) characterized by a galactosylated amphiphile (GLT1) that promotes the interaction with bacteria. The results indicate that RSV loaded in LG has anti-adherence and anti-biofilm activity higher than free RSV. On the other side, free RSV has a higher bacterial-growth-inhibiting effect than encapsulated RSV and it can damage cell walls by creating pores; however, this effect can not prevent bacteria from growing again. This RSV ability may underlie its bacteriostatic activity.