pH/Redox Dual-Responsive Drug Delivery System with on-Demand RGD Exposure for Photochemotherapy of Tumors.

Introduction Cancer is the second leading cause of human death and has shown an increasing trend year by year, seriously threatening the development of human health and the social economy. 1 Conventional cancer treatment options include chemotherapy, radiotherapy, and surgery. 2 However, chemotherapy generally leads to serious side effects, surgery is accompanied by a high tumor recurrence rate, and radiotherapy is limited by the therapeutic dose.

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