Targeting Cancer Cells with Photoactive Silica Nanoparticles.

This review highlights recent advances in the preparation of silica nanoparticles (SNPs) functionalized with porphyrins and phthalocyanines for application in cancer photodiagnostic and photodynamic therapy (PDT). The use of photosensitizer-SNP formulations has emerged recently as a new nanomedicine for cancer research owing to their unique physicochemical properties, which make them useful for photo-biomedical applications. In order to study their photobiological properties, diverse chemical strategies involving covalent and non-covalent bonding have been used to load photosensitizers in/on SNPs.