Abstract
Tumor hypoxia severely restrains the efficiency of irreversible O2-consumption photodynamic therapy. The deep hypoxia induced by photodynamic therapy can promote the level of hypoxia inducible factor 1α that participates in many tumor processes and eventually lead to poor therapeutic outcomes. Herein, a chemo-photodynamic antitumor strategy based on ultrathin graphitic carbon nitride nanosheets loaded with a hypoxia-targeting platinum(IV) prodrug is reported. Under low-intensity visible light irradiation, such integrated nanosheets effectively generate reactive oxygen species together with DNA binding platinum species to achieve enhanced antiproliferation efficacy by downregulating HIF-1α under hypoxic conditions.
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