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Journal Article
Research Support, Non-U.S. Gov't
Glucose & oxygen exhausting liposomes for combined cancer starvation and hypoxia-activated therapy.
Biomaterials 2018 April
Starvation therapy to slow down the tumor growth by cutting off its energy supply has been proposed to be an alternative therapeutic strategy for cancer treatment. Herein, glucose oxidase (GOx) is loaded into stealth liposomes and act as the glucose and oxygen elimination agent to trigger the conversion of glucose and oxygen into gluconic acid and H2 O2 . Such liposome-GOx after intravenous injection with effective tumor retention is able to exhaust glucose and oxygen within the tumor, producing cytotoxic H2 O2 and enhancing hypoxia, as vividly visualized by non-invasive in vivo photoacoustic imaging. By further combination treatment with stealth liposomes loaded with banoxantrone dihydrochloride (AQ4N), a hypoxia-activated pro-drug, a synergistically enhanced tumor growth inhibition effect is achieved in the mouse model of 4T1 tumor. Hence, by combining starvation therapy and hypoxia-activated therapy tactfully utilizing liposomal nanocarriers to co-deliver both enzymes and prodrugs, an innovative strategy is presented in this study for effective cancer treatment.
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