Reactive oxygen species generation via photoactivation (ROS generation (photoactivation))

Reactive oxygen species (ROS) are highly reactive molecules derived from molecular oxygen, including superoxide anion radical (\( \mathrm{O}_2^{\cdot -} \)), hydrogen peroxide (\( \mathrm{H}_2\mathrm{O}_2 \)), singlet oxygen (\( ^1\mathrm{O}_2 \)), and hydroxyl radical (\( \cdot\mathrm{OH} \)). Generation of ROS via photoactivation refers to the process by which light energy—often in the presence of a photocatalyst such as titanium dioxide—leads to the formation of these reactive species. This process is central in photocatalysis and photodynamic therapy, where light exposure triggers electron transfer reactions that produce ROS at or near biological or material surfaces[1]. Biologically, these species play dual roles as both damaging agents causing oxidative stress and cell death, and as signaling molecules involved in processes like immune defense and cellular adaptation to stress. Excessive or uncontrolled production can lead to oxidative damage implicated in various diseases including cancer, neurodegeneration, cardiovascular disorders, inflammation, and general tissue injury[2][3]. However, "reactive oxygen species generation via photoactivation" is not a specific molecule or receptor but rather a chemical/physical process; thus it does not fit standard definitions for therapeutic targets such as receptors or enzymes.

Other names

Photoinduced reactive oxygen species productionPhotocatalytic ROS generationLight-induced ROS formation