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Multifunctional nanoplatform for photoacoustic imaging-guided combined therapy enhanced by CO induced ferroptosis

Xianxian Yao, Peng Yang, Zhaokui Jin, Qin Jiang, Ranran Guo, Ruihong Xie, Qianjun He, Wuli Yang
A multifunctional CO/thermo/chemotherapy nanoplatform is here reported, which is composed of mesoporous carbon nanoparticles (MCN) as near infrared (NIR)-responsive drug carrier, doxorubicin (DOX) as chemother- apeutic drug and triiron dodecacarbonyl (FeCO) as thermosensitive CO prodrug. The nanoplatform could absorb near-infrared (NIR) light and convert it into ample heat to trigger CO release and could also release DOX in the acidic tumor microenvironment. More importantly, the generated CO molecules successfully increase cancer cell sensitivity to chemotherapeutics by the ferroptosis pathway. Subsequently, under the guidance of photoacoustic imaging, the FeCO-DOX@MCN nanoplatform demonstrates high treatment efficacies in vitro and in vivo by combination of chemotherapy, photothermal therapy and gas therapy. This multifunctional platform with ex- cellent antitumor efficacy has great potential in precision cancer therapy.

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