Antimicrobial Activity of Host-Derived Lipids.

Area of Science:

• Innate Immunity
• Microbiology
• Biochemistry

Background:

• Host-derived lipids, including sphingoid bases and fatty acids, are increasingly recognized for their roles in innate immunity.
• These lipids are present on mucosal surfaces, skin, and in body fluids, exhibiting antimicrobial and anti-inflammatory effects.

Purpose of the Study:

• To review the history and current understanding of antimicrobial lipids (AMLs) from human body systems.
• To summarize their antimicrobial activity, mechanisms of action, and therapeutic potential.

Main Methods:

• Literature review of studies on antimicrobial lipids.
• Compilation and summary of data on lipid activity against various microorganisms.
• Discussion of proposed mechanisms and therapeutic applications.

Main Results:

• Antimicrobial lipids exhibit specific and selective activity against Gram-positive and Gram-negative bacteria, viruses, and fungi.
• Fatty acids primarily target bacterial membranes, while sphingoid bases may affect cell wall synthesis.
• Endogenous AML treatments show low toxicity, reduce inflammation, and are effective against biofilms.

Conclusions:

• Antimicrobial lipids are crucial innate effector molecules with significant therapeutic potential.
• Further research is needed to fully elucidate AML mechanisms and optimize their use in novel treatments.
• AMLs offer a promising avenue for topical antimicrobial therapies with a favorable safety profile.