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Doxorubicin-loaded hollow gold nanospheres (Dox@HAuNS) are a promising technology for simultaneous trans-arterial tumor-targeted chemotherapy delivery and thermal ablation. We evaluated the efficacy of intra-arterial delivery of Dox@HAuNS followed by photothermal ablation (PTA) in a rabbit model of liver cancer. Adult New Zealand white rabbits (N=25) were inoculated with VX2 tumors into the left lobe of the liver. The animals were then randomized to sham surgery (N=5), PTA only (N=3), Dox@HAuNS only (N=5), HAuNS + PTA (N=5), and Dox@HAuNS + PTA (N=7). Nanoparticles were delivered as an emulsion with Lipiodol (Guerbet, France) via a trans-arterial approach. Following nanoparticle delivery, PTA was performed using an 808nm fibered laser at 1.5W for 3 minutes. Thermography during PTA demonstrated a sustained elevation in tumoral temperature in both HAuNS + laser and Dox@HAuNS + laser treatment groups relative to animals that underwent laser treatment without prior nanoparticle delivery.

Doxorubicin-loaded hollow gold nanospheres for dual photothermal ablation and chemoembolization therapy