Microbial cell wall and membrane disruption via oxidative stress

The target “Microbial cell wall/membrane disruption via oxidative stress” refers to a broad mechanism employed in antimicrobial strategies that utilize reactive oxygen species (ROS) to damage and penetrate the structural barriers of microbial cells[7]. ROS—including superoxide, hydrogen peroxide, hydroxyl radicals, and singlet oxygen—oxidize key cell wall proteins, membrane lipids, and nucleic acids, thereby impairing microbial viability through loss of structural integrity, leakage of cellular contents, and interference with essential biological processes such as transcription, translation, and metabolic function[1][4][5][6][7]. This is not a singular molecular target but an emergent vulnerability exploited by therapies like metal-based nanoparticles, laser-activated photosensitizers, and certain antibiotics, all of which induce localized ROS accumulation in or near microbial cell envelopes. Microorganisms respond via transcriptional reprogramming (e.g., CWI pathway, Agr system, oxidative stress regulons), activation of scavenger enzymes, and sometimes adaptive modifications to cell wall and membrane architecture[1][2][3]. Despite its effectiveness, this approach poses risks of unintended host tissue damage and can drive microbial evolution towards enhanced oxidative stress tolerance[2][7].

Other names

Oxidative stress-mediated microbial cell wall disruptionROS-induced cell wall/membrane damageoxidative membrane injury

Generation of reactive oxygen and nitrogen species that oxidize lipids, proteins, and nucleic acids; Lipid peroxidation of microbial membranes; Oxidative crosslinking and damage to cell wall proteins; ROS-induced cleavage of cell wall polysaccharides and membrane structures; Fenton reaction-mediated hydroxyl radical generation