Tumor cell membrane and vasculature disruption via photodynamic effect

The phrase describes the therapeutic effect of Photodynamic Therapy (PDT), a procedure where a photosensitizing drug is administered and preferentially accumulates in cancer cells and associated vasculature. Upon irradiation with light of a specific wavelength, the drug becomes activated, generating reactive oxygen species (mostly singlet oxygen). These ROS rapidly damage cellular membranes and the structural components of blood vessels within the tumor, leading to cell death, blockage of tumor blood supply, tumor hypoxia, and immune activation. This mechanism is utilized for localized cancer treatment, targeting both the tumor parenchyma and its supporting microvasculature, and is not a single molecular target but a multi-faceted biological response.

Other names

Photodynamic-induced tumor membrane disruptionPhotodynamic-induced tumor vasculature ablation

Generation of reactive oxygen species (ROS) upon photosensitizer activation by light Selective destruction of tumor cell membranes and tumor vasculature through oxidative damage