Photodynamic therapy (PDT) is a novel therapeutic approach for combating various cancers. PDT involves the administration of a photosensitizer which generates singlet oxygen after light activation. FosPegr is the liposomal formulation of mTHPC. In this in vitro study, the photodynamic efficacy of FosPegr on a human colon cancer cell line (HT29) was investigated via studying the cellular uptake of FosPegr , FosPegr PDT mediated photocytotoxicity and the cell death mechanism were triggered. FosPeg
