Fig. 2From: pH and redox dual-responsive nanoparticles based on disulfide-containing poly(β-amino ester) for combining chemotherapy and COX-2 inhibitor to overcome drug resistance in breast cancerMorphological characterization of HPPDC nanoparticles. TEM images of PPDC nanocores (a) and HPPDC nanoparticles (c). Size distributions of PPDC nanocores (b) and HPPDC nanoparticles (d). The weight ratio of ssPBAE/PLGA in PPDC nancores was 3/1 and the weight ratio of HA/PPDC nanocores in HPPDC nanoaprticles was 1/1. The loading contents of DOX and CXB were 3.92% and 7.98%, respectivelyBack to article page