Journal
MATERIALS HORIZONS
Volume 7, Issue 7, Pages 1834-1844Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0mh00105h
Keywords
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Funding
- National Basic Research Program of China [2016YFA2021600]
- Beijing Natural Science Foundation [2202064]
- National Natural Science Foundation of China [51772293, 51822207, 51772292, U1932112, 31571015, 11621505]
- CAS Youth Innovation Promotion Association [2013007]
- CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-SLH022]
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Tumor microenvironment (TME)-mediated nanocatalytic therapy has been deemed as a promising strategy for improving the effectiveness of tumor therapy. Herein, we construct a glucose-responsive cascaded nanocatalytic reactor (MoS2@CGTC NCR) which co-loads glucose oxidase (GOx) and chemotherapeutic drug tirapazamine (TPZ) on the surface of the MoS(2)nanozyme carrier for modulating the TME to achieve self-enhanced chemo-catalytic therapy. Based on the intratumoral ultrahigh glucose concentration, the MoS2@CGTC NCR can persistently regulate the TME through oxidizing glucose to produce gluconic acid and H2O2, while rapidly depleting oxygen to activate the chemotherapeutic. Subsequently, the self-supplied H(+)and H(2)O(2)can markedly boost the subordinate peroxidase-like catalytic efficacy of nano-sized MoS2, yielding abundant highly toxic hydroxyl radicals ((OH)-O-center dot) for nanocatalytic therapy. Meanwhile, MoS(2)can also deplete glutathione (GSH) to reduce the consumption of (OH)-O-center dot. Bothin vitroandin vivoresults demonstrated that the MoS2@CGTC NCR performed well in suppressing tumor growthviaself-enhancing chemo-catalytic therapy. This work highlights the use of self-assembled NCRs for enhanced tumor synergetic therapyviaTME regulation.
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