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pH-responsive drug delivery systems can retain the drug within the carrier and release it under mild acidic conditions [1].They improve the therapeutic efficacy and decrease the side effects of anticancer drugs during chemotherapy.Bortezomib (BTZ) is an efficient anticancer drug in the treatment of various cancers,however,it is usually criticized for serious side effects [2].Numerous drug carriers were designed to deliver BTZ in the past decade,but few of them can realize "off-on"release of BTZ in tumor tissues [3].