Abstract
Tumor-specific phototheranostics is conducive to realizing precise cancer therapy. Herein, a novel tumor microenvironment (TME)-responsive phototheranostic paradigm based on the combination of semiconducting polymer brushes and polyoxometalate clusters (SPB@POM) is rationally designed. The acidic TME could drive the self-assembly of SPB@POM into bigger aggregates for enhanced tumor retention and accumulation, while the reducing TME could significantly enhance the NIR absorption of SPB@POM for significant improvement of photoacoustic imaging contrast and photothermal therapy efficacy. Therefore, the smart pH/glutathione (GSH)-responsive SPB@POM allows for remarkable phototheranostic enhancement under the unique TME, which has potential for precise tumor-specific phototheranostics with minimal side effects.
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