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(a) Schematic illustration of preparation of ROS stimulus-responsive nanoparticles (PCL-TL-NPPTX/Ce6) loaded with Ce6 and PTX. (b) PDMA was cleaved upon the stimulation of ROS. Cell uptake under 660 nm light irradiation was improved. A synergistic effect of photodynamic therapy (PDT) and chemotherapy was achieved through efficient cell uptake and drug release. Reproduced with permission from the publisher of corresponding reference [73].
