Journal
SMALL
Volume 12, Issue 45, Pages 6223-6232Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201601966
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Funding
- National Natural Science Foundation of China [51303154, 51573160, 21574114]
- Key Science Technology Innovation Team of Zhejiang Province [2013TD02]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry [[2015]311]
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Photodynamic theranostics has recently been extensively explored as a promising approach for precise localization and therapy. Herein, glutathione (GSH) activatable photosensitizer (PS)-conjugated pseudopolyrotaxane nanocarriers (alpha-CD-ss-Ce6 NPs) are reported for enhanced photodynamic theranostics by taking advantage of the noncovalent interactions between alpha-cyclodextrin (alpha-CD) and poly(ethylene glycol). The designed alpha-CD-ss-Ce6 NPs are nonactivated and stable during circulation but exhibited strong photodynamic theranostics through GSH activating after arriving at tumor site. More importantly, compared to free chlorin e6 (Ce6), such kind of pseudopolyrotaxane nanocarrier can dramatically enhance Ce6 accumulation in tumor and prolong its tumor retention time, demonstrating excellent therapeutic effects after light irradiation. Overall, the designed GSH activatable PS-conjugated pseudopolyrotaxane nanocarrier possessing high-performance photodynamic therapeutic efficacy together with reduced side effects offers a promising alternative for photodynamic theranostics.
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