Photodynamic Therapy (PDT) is a promising cancer treatment strategy that can potentially reduce the risks of systemic toxicity, collateral healthy tissue damage and surgical trauma and tissue debilitation, especially when repeated treatment becomes necessary because of the aggressive nature of the cancer. PDT involves three components: a photosensitizer (PS) drug, a specific wavelength of drug-activating light and oxygen. Light activation of a photosensitizer results in energy transfer cascades that ultimately yield cytotoxic reactive oxygen species, which can then render apoptotic and necrotic cell death.

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