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A versatile strategy to create active tumor-targeted chemo-photothermal therapy nanoplatform: a case of IR-780 derivative co-assembled with camptothecin prodrug.
Acta Biomaterialia 2018 November 30
Self-assembled nanovehicles of chemotherapy drug with photothermal agent are regarded as intriguing chemo-photothermal therapy nanoplatform. However, most of the drugs and photothermal agents have poor water solubility and poor interactions to drive the formation of self-assembled nanovehicles, which is a bottleneck of co-assembled drug/photothermal agent for cancer therapy. Here, we proposed a versatile strategy to create self-assembled chemo-photothermal therapy nanoplatform based on the chemical modification of photothermal agent and drug. The IR-780 and camptothecin (CPT) were chosen as the studied models since they are important photothermal agent and anticancer drug, both of which have such poor water solubility with strong itself molecular interactions that they cannot co-assemble together. IR-780 was modified with an active targeting ligand lactobionic acid (LA) to result in amphiphilic IR780-LA while CPT was modified into redox-sensitive prodrug CPT-ss-CPT through a disulfide linkage to realize its assembly. Well-defined nanoparticles (NPs) could be created through the co-assembling of IR780-LA and CPT-ss-CPT. The IR780-LA/CPT-ss-CPT nanoparticles were demonstrated to be an excellent fluorescence imaging-guided, redox-responsive and enhanced synergistic chemo-photothermal therapy nanoplatform against tumors. Specifically, our chemical modification strategy offers a universal way to create self-assembled chemo-photothermal therapy nanoplatform, which solves the bottleneck of co-assembled drug/photothermal agent for cancer therapy. STATEMENT OF SIGNIFICANCE: Self-assembled nanoparticles of chemotherapeutics with photothermic drugs are regarded as intriguing chemo-photothermal therapy nanoplatform. However, most drugs have too poor solubility and interactions to form into self-assembled nanoparticles. We proposed a versatile strategy to create co-assembled chemo-photothermal therapy nanoparticles based on the chemical modification of common drugs. The IR-780 was modified with an active targeting ligand LA to result in amphiphilic IR780-LA molecules, while CPT was modified into redox-sensitive prodrug CPT-ss-CPT through disulfide linkage. Well-defined IR780-LA/CPT-ss-CPT nanoparticles were created through the co-assembling of IR780-LA and CPT-ss-CPT. The nanoparticles were demonstrated to be an excellent fluorescence imaging-guided, redox-responsive, active targeting chemo-photothermal therapy nanoplatform against tumors. Our strategy offers a versatile way to construct smart chemo-photothermal therapy nanoplatform from common drugs.
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