Tumor Microenvironment Cascade Activated Biodegradable Nano-Enzymes for Glutathione-Depletion and Ultrasound-Enhanced Chemodynamic Therapy
Chemodynamic therapy (CDT) is emerged as a novel and promising tumor therapy by using the powerful reactive oxygen species (ROS) to kill cancer cells. However, the current CDT is remarkably inhibited due to insufficient H O supply and over-expression of glutathione (GSH) in the tumor microenvironmen...
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Veröffentlicht in: | Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-10, p.e2405457 |
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Sprache: | eng |
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Zusammenfassung: | Chemodynamic therapy (CDT) is emerged as a novel and promising tumor therapy by using the powerful reactive oxygen species (ROS) to kill cancer cells. However, the current CDT is remarkably inhibited due to insufficient H
O
supply and over-expression of glutathione (GSH) in the tumor microenvironment (TME). Herein, a biodegradable self-supplying H
O
nano-enzyme of CuO
@CaP with a GSH-consumption effect is designed for cascade enhanced CDT to overcome the problem of H
O
deficiency and GSH overexpression. In this design, CuO
@CaP is gradually degraded to Ca
, Cu
, and H
O
in acidic TME, resulting in synergistically enhanced CDT owing to the efficient self-supplied H
O
and GSH-depletion and Ca
overload therapy. Interestingly, the faster degradation of CuO
@CaP and promoted production rate of •OH are further achieved after triggering with ultrasound (US). And, the US-enhanced CDT and Ca
overload synergistic antitumor therapy is successfully achieved in vivo. These findings provide a promising strategy for designing biodegradable nano-enzymes with self-supplying H
O
and GSH consumption for US-mediated CDT. |
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ISSN: | 1613-6810 1613-6829 1613-6829 |
DOI: | 10.1002/smll.202405457 |