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(a) Schematic representation of the PEGylated BP theranostic delivery platform. 1: PEG-NH2 (surface modification), 2: DOX (therapeutic agents), 3: Cy7-NH2 (NIR imaging agents), 4: FA-PEG-NH2 (Targeting agents), 5: FITC-PEG-NH2 (fluorescent imaging agents). (b) Screening and summary of the endocytosis pathways and biological activities of PEGylated BP NSs in cancer cells.
