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The combination of imaging contrast media and treatment strategies in one nanosystem has received great attention for cancer detection and treatment. This study aimed to develop Au@MnO/PEG/5FU (AMP/5FU) nanoparticles (NPs) for dual-modal CT/MRI and 5-Fluorouracil (5FU) anticancer drug delivery. The NPs showed a high 5FU loading capacity (90%), pH-responsive release profile, considerable X-ray attenuation, and MRI r1 relaxivity of 4.36 mM −1 s −1 . They had a significant toxic impact against A549 cancer cells that was greater than that of free 5FU. AMP/5FU NPs can be considered as a high potential multifunctional nanosystem for dual-modal CT/MRI and pH-responsive 5FU delivery.

Multifunctional polyethylene glycol-coated Au@MnO nanoparticles for dual-modal CT/MRI and pH-responsive 5-Fluorouracil delivery