Cytoxicity of PTX-loaded HSAF NPs with different crosslinking degrees and diameters (PLC40S70, PLC70S70, PLC90S70, PLC40S160, and PLC40S260) against MCF-7 cells at 24, 48, and 72 h. The commercial product Taxol® was used as the positive control (n = 6). PL, paclitaxel loading.