Fig. 4From: Internal cross-linked polymeric nanoparticles with dual sensitivity for combination therapy of muscle-invasive bladder cancerCell viability and uptake of IR780&DOX nanoparticles. a In vitro cytotoxicity and therapeutic efficacy of the IR780 and DOX-loaded PEG-PCL-SS nanoparticles. b Observing cellular uptake using a fluorescence microscope in bright field, DOX channel, IR780 channel, DAPI and merge vision. Scale bars = 20 μm. (eyepiece: 1×, objective lens: 20×)Back to article page