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Bimetallic DNAsome Decorated with G 4 -DNA as a Nanozyme for Targeted and Enhanced Chemo/Chemodynamic Cancer Therapy.
Advanced Healthcare Materials 2024 April 27
Cancer is indisputably one of the major threats to mankind and hence the design of new approaches for the improvement of existing therapeutic strategies is always wanted. Herein, the design of a TME-responsive, DNA-based CDT nanoagent with dual Fenton reaction centers for targeted cancer therapy is reported. Self-assembly of DNA amphiphile containing copper complex as the hydrophobic Fenton reaction center results in the formation of CDT-active DNAsome with Cu2+ -based Fenton catalytic site as the hydrophobic core and hydrophilic ssDNA protrude on the surface. DNA-based surface addressability of the DNAsome is then used for the integration of second Fenton reaction center, which is a peroxidase-mimicking DNAzyme noncovalently loaded with Hemin and Doxorubicin, via DNA hybridization to give a CDT agent having dual Fenton reaction centres. Targeted internalization of the CDT nanoagent and selective generation of • OH inside HeLa cell are also shown. Excellent therapeutic efficiency is observed for the CDT nanoagent both in vitro and in vivo and the enhanced efficacy is attributed to the combined and synergetic action of CDT and chemotherapy. This article is protected by copyright. All rights reserved.
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