Tumor cell membrane and cytoplasm damage via singlet oxygen production after photoactivation

The entry "Tumor cell membrane/cytoplasm damage via singlet oxygen production after photoactivation" does not refer to a single molecular target such as a receptor, enzyme, or transporter. Instead, it describes a mechanistic process central to photodynamic therapy (PDT) for cancer. In PDT, administration of a photosensitizer followed by targeted light exposure generates singlet oxygen, a highly reactive form of molecular oxygen. This species induces oxidative stress that damages the plasma membrane and intracellular organelles—such as mitochondria and lysosomes—leading to apoptosis or necrosis specifically in illuminated tumor cells. The process is selective for tumor cells due to their altered redox environment and protective mechanisms like catalase expression; however, it is not itself an individual druggable target but rather the result of chemical interactions initiated by therapeutic intervention. Because this entry refers broadly to a mode/mechanism of action rather than an individual molecule or protein that can be directly targeted by drugs, it should not be classified as a canonical therapeutic target. If you require structured information on specific molecules involved in this pathway—such as catalase on the tumor cell surface or particular photosensitizers used clinically—please specify further so more precise data can be provided.

Other names

Singlet oxygen-mediated tumor cell damagePhotodynamic therapy-induced tumor cell deathPhotoactivated singlet oxygen cytotoxicity

Generation of singlet oxygen by photoactivated photosensitizers leads to oxidative damage of cellular membranes and organelles.