Membrane-targeted mechanism for amphiphilic vitamin C compounds as methicillin-resistant Staphylococcus aureus...

Area of Science:

• Microbiology
• Biochemistry
• Environmental Science

Background:

• Staphylococcus aureus infections and biofilm formation pose significant healthcare challenges.
• Methicillin-resistant S. aureus (MRSA) contributes to high morbidity and mortality.
• Conventional disinfectants for biofilms have adverse environmental effects.

Purpose of the Study:

• To investigate the antimicrobial and antibiofilm potential of alkyl esters of L-ascorbic acid (ASCn).
• To explore the combined amphiphilic and redox mechanisms underlying ASCn's efficacy.
• To develop novel biofilm eradication agents with reduced environmental impact.

Main Methods:

• Testing ASCn formulations against methicillin-sensitive and resistant S. aureus strains.
• Evaluating the ability of ASC12 and ASC14 to eliminate biofilm persister cells.
• Analyzing the proposed mechanisms of action, including diffusion, membrane interaction, and functional group reduction.

Main Results:

• ASCn compounds exhibit antimicrobial capacity against both methicillin-sensitive and resistant S. aureus.
• ASC12 and ASC14 formulations effectively kill persister cells within deep biofilm layers.
• The mechanism involves enhanced diffusion, membrane disruption, and reduction of functional groups.

Conclusions:

• ASCn demonstrates significant potential as a novel agent for Staphylococcus aureus biofilm eradication.
• The combined amphiphilic and redox properties of ASCn are crucial for its antimicrobial and antibiofilm activity.
• ASCn offers a promising alternative to conventional disinfectants with a better environmental profile.