Hypoxia is the common characteristic of almost all solid tumors, which prevents therapeutic drugs from reaching the tumors. Therefore, the development of new targeted agents for the accurate diagnosis of hypoxia tumors is widely concerned. As carbonic anhydrase IX (CA IX) is abundantly distributed on the hypoxia tumor cells, it is considered as a potential tumor biomarker. 4-(2-Aminoethyl)benzenesulfonamide (ABS) as a CA IX inhibitor has inherent inhibitory activity and good targeting effect. In this study, AgS quantum dots (QDs) were used as the carrier to prepare a novel diagnostic and therapeutic bioprobe (AgS@polyethylene glycol (PEG)-ABS) through ligand exchange and amide condensation reaction. AgS@PEG-ABS can selectively target tumors by surface-modified ABS and achieve accurate tumor imaging by the near infrared-II (NIR-II) fluorescence characteristics of AgS QDs. PEG modification of AgS QDs greatly improves its water solubility and stability, and therefore achieves high photothermal stability and high photothermal conversion efficiency (PCE) of 45.17%. Under laser irradiation, AgS@PEG-ABS has powerful photothermal and inherent antitumor combinations on colon cancer cells (CT-26) . It also has been proved that AgS@PEG-ABS can realize the effective treatment of hypoxia tumors and show good biocompatibility. Therefore, it is a new efficient integrated platform for the diagnosis and treatment of hypoxia tumors.
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| http://dx.doi.org/10.1016/j.jpha.2024.100969 | DOI Listing |
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