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• W3205496191 abstract "Based on the tumor microenvironment with weak acidic characteristics, a nano-drug delivery system that achieves controlled release of drugs through the pH response has been a popular strategy to improve the effectiveness of tumor therapy and reduce toxic side effects, and combining photothermal therapy (PTT) on this basis can help improve the antitumor effect. In this study, mesoporous silica nanoparticles (MSNs) were surface-modified with polymer poly(PEGMA-co-HEMA) via surface-initiated atom transfer radical polymerization, and a multifunctional nanoplatform MSN@poly(PEGMA-co-HEMA-g-doxorubicin (DOX)/indocyanine green (ICG) was designed for effective photothermal/chemotherapy combination therapy. The anticancer drug DOX was anchored to the polymer on the surface of MSN by reversible covalent bond cis-aconitic anhydride with a drug loading of 10%. Meanwhile, the small-molecule dye was loaded into the pores of MSN, and PTT mediated by near-infrared (NIR) radiation could further kill cancer cells. Under low-pH stimulation, the cis-aconitic anhydride bond breaks and DOX is released, with a 65% increase in cumulative drug release over 50 h compared to that at pH 7.4 (normal physiological environment). The high temperature induced by photothermal conversion accelerated the reversible covalent bond breakage, and the cumulative drug release at pH 5.0 for 3 h at elevated temperature up to 50 °C increased by 24.3% compared with that under normal physiological conditions (T = 37 °C), demonstrating that increasing the temperature can reduce the time required to reach blood drug concentration. In vitro cytotoxicity results revealed that the prodrug delivery system showed stronger cytotoxicity under NIR light irradiation compared with free DOX, with more than 90% of tumor cells killed after 48 h. Therefore, MSN@poly(PEGMA-co-HEMA-g-DOX)/ICG enhanced the synergistic effect of chemotherapy through photothermal action and accelerated reversible chemical bond cleavage, which has great potential in the combined therapy of cancer." @default.
• W3205496191 created "2021-10-25" @default.
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• W3205496191 date "2021-10-13" @default.
• W3205496191 modified "2023-10-10" @default.
• W3205496191 title "Mesoporous Silica Nanoprodrug Encapsulated with Near-Infrared Absorption Dye for Photothermal Therapy Combined with Chemotherapy" @default.
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• W3205496191 doi "https://doi.org/10.1021/acsabm.1c00751" @default.
• W3205496191 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35005934" @default.
• W3205496191 hasPublicationYear "2021" @default.
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