pH-responsive poly(d,l-lactide-co-glycolide) NPs coated with bovine serum albumin and encapsulating in their cores of GQDs and DOX, which showed superb blood compatibility, exhibited improved drug release in a mild acidic microenvironment, a dose- and time-dependent cytotoxicity to the HeLa cells, and contributed to a lower cancer cell viability [131]. Here, ALB is linked to cancer.