Review of the Antimicrobial Potential of the Marine-Derived Endoperoxide: Algadioxide A

Abstract

The escalating crisis of antimicrobial resistance (AMR) demands the discovery of novel antibiotics with unconventional mechanisms of action. Marine natural products, particularly those bearing rare peroxide (endoperoxide) functionalities, represent a promising but underexplored chemical space. This study isolated and characterized algadioxide A (C19H22O4), a structurally unique marine dioxide from a marine alga. Algadioxide A exhibited potent and selective antibacterial activity against Gram-positive pathogens, notably Staphylococcus aureus (MIC 8 µg/mL). Mechanistic evaluations revealed that the compound acts primarily through the disruption of bacterial cell membrane integrity, leading to ATP depletion and potassium leakage. While less potent than some standard antibiotics like vancomycin, its ability to retain activity against resistant strains and its novel scaffold position it as a significant lead for preclinical development.