Fig. 11.

Micrographs of hematoxylin & eosin-stained pathological sections collected at the end of the 13-day treatment period. A549 tumor-bearing BALB/c nude mice were intravenously administered normal saline (Saline, control) and drug-loaded nanoparticle preparations once every 2 days for 12 days. For the phototherapy group, animals were exposed to NIR at 808 nm (1 W/cm²) for 5 min 2 h post-drug administration. PTX: 5 mg/kg; IR780: 1 mg/kg (n = 5)