Background & Aim: Photosensitizers are key molecules used in photodynamic cancer
therapy (PDT), which is an effective therapeutic modality option for several diseases and nononcological
disorders. Due to its lower systemic toxicity and its ability to destroy tumors
selectively, PDT has been considered as clinical avenue for the treatment of several cancers.
Methods & Results: Three essential elements are involved in a PDT procedure: a photosensitizer,
light of a specific wavelength, and singlet oxygen. However, the properties of conventional
photosensitizers exhibit some drawbacks that may limit their use. Nanoparticles can provide
significant benefits that counter these drawbacks and enable higher efficiency and biosafety. With
the development of nanotechnology, nanoparticles have been used to encapsulate photosensitizers to
enhance the phototoxic and pharmacokinetic properties of these agents.
Conclusion: Here, the main motivation for this review is to summarize recent progress in the
development of photosensitizers, in particular, photosensitizers with nanoparticle modifications. In
addition, we reviewed the clinical treatment of several diseases using photosensitizers formulated
with nanoparticles, with the overall goal of aiding the design and development of novel