Microbial cell membrane and reactive oxygen species (ROS)

Microbial cell membranes and reactive oxygen species (ROS) represent fundamental targets and mechanisms in antimicrobial therapy. The microbial cell membrane is a critical lipid bilayer that maintains cellular integrity, regulates ion transport, and facilitates energy production through the electron transport chain (StatPearls, 2023). Disruption of this membrane by agents like polymyxins or daptomycin leads to the leakage of intracellular contents and rapid cell death (PubMed, 2022). Free radicals, such as ROS, are highly reactive molecules that cause non-specific damage to microbial proteins, lipids, and DNA (PubChem, 2024). These mechanisms are utilized by various antiseptics and antibiotics to provide broad-spectrum activity against bacteria, fungi, and certain viruses (Clinical Microbiology Reviews, 2019). However, the lack of high specificity can sometimes lead to toxicity in human host cells, particularly with systemic administration, resulting in concerns such as nephrotoxicity (NIH, 2023).

Other names

Bacterial cell membraneFungal cell membraneFree radicalsOxidative stressReactive oxygen species

Disruption of microbial membrane integrity leading to cytoplasmic leakage and loss of membrane potential, alongside the generation of reactive oxygen species that cause lethal oxidative damage to DNA, proteins, and lipids.