Transport of photosensitizing agents living with immune cells for tumor treatment

Using at least one modified mammalen immune cell for the targeted transport of a photosensitizing substance for treating tumor cells, characterized in that it is loaded with a photosensitizing substance, wherein it is a chemical moiety or a precursor of a chemical component, wherein the photosensitizing substance is included in the immune cell, and is transmitted to a tumor cell, and wherein the photosensitizing substance is a photosensitizer; or the photosensitizing substance is a water-soluble photosensitizer complex, a chemically modified photosensitizer, photosensitizer a liposomal formulation, a nano- or microparticulate photosensitizer formulation, a dendrimeric photosensitizer formulation, a photosensitizer-antibody conjugate and / or a photosensitizing nanoparticles.