Abstract
Abstract The development of smart stimuli-responsive materials for drug delivery offers new opportunities for precise drug release and cancer chemotherapy. A combination of more than one stimuli is highly desirable to further maximize the therapy by taking the advantages of various unique merits. Herein, we employed polyethylene glycol (PEG) functionalized γ-Fe2O3 particles (γ-Fe2O3/PEG) as a novel magnetic drug carrier for doxorubicin (DOX) delivery. The results showed that the γ-Fe2O3/PEG exhibited excellent thermal effects under alternating magnetic field (AMF), high magneto-thermal stability, and large DOX loading capacity. Furthermore, the effects of pH and AMF on the DOX drug release were studied. It was discovered that DOX loaded γ-Fe2O3/PEG carriers were highly responsive to both AMF and pH, resulting in significantly improved cancer cell killing capability over a single stimulus. The magnetic and pH responsive drug delivery system provided a new opportunity to minimize the side effects and maximize the therapeutic efficiency of lung cancer treatment.
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