The invention discloses a phototherapy nano-
drug with mitochondrial / STAT3
protein double-site targeting. The phototherapy nano-
drug is ATO / CR nano-particles formed by self-assembling a compound CR and atorvaquone under the action of distearoyl
phosphatidyl ethanolamine-
polyethylene glycol; the structure of the compound CR is shown as a formula I in the specification. The invention discloses an application of the phototherapy nano-
drug with mitochondrial / STAT3
protein double-site targeting in preparation of drugs for treating tumors. The phototherapy nano-drug can target mitochondria and STAT3
protein in
tumor cells through ATO, and can also passively target tumor sites through the high-permeability long-retention effect of nano-particles, so that more nano-therapeutic agents are enriched around tumors, and the
curative effect is improved. The phototherapy nano-drug provided by the invention has good photothermal performance, can effectively enhance the PTT effect of gastric
cancer, and exerts the tumor synergistic treatment ability by promoting
cell apoptosis, inhibiting
angiogenesis and hindering the
cell cycle.