Drug
delivery systems with remotely controlled drug release capability
are rather attractive options for cancer therapy. Herein, a reactive
oxygen species (ROS)-sensitive polymeric nanocarrier TK-PPE@NPCe6/DOX was explored to realize remotely controlled drug release
by light-activated size shrinkage. The TK-PPE@NPCe6/DOX encapsulating chlorin e6 (Ce6) and doxorubicin (DOX) was self-assembled
from an innovative ROS-sensitive polymer TK-PPE with the assistance
of an amphiphilic copolymer poly(ethylene glycol)-b-poly(ε-caprolactone) (PEG-b-PCL). Under the
660 nm red light irradiation, ROS generated by the encapsulated Ce6
were capable of cleaving the TK linker in situ, which
resulted in the rapid degradation of the TK-PPE@NPCe6/DOX core. Consequently, the size of TK-PPE@NPCe6/DOX shrank
from 154 ± 4 nm to 72 ± 3 nm, and such size shrinkage affected
further triggered rapid DOX release. As evidenced by both in vitro and in vivo experiments, such
ROS-sensitive polymeric nanocarriers with light-induced size shrinkage
capability offer remarkable therapeutic effects in cancer treatment.
This concept provides new avenues for the development of light-activated
drug delivery systems for remotely controlled drug release in vivo.
A dual-phase alloy with regular patterns as an advanced Li anode is prepared by a facile one-step fusion method for effectively suppressing Li dendrite growth and mitigating volume variation.
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