Abstract
Photodynamic therapy would suffer from low efficiency in the cancer treatment process if the reactive oxygen species (ROS) generated from a photosensitizer (PS) were reduced by intracellular glutathione (GSH). To overcome this limitation, in this work, we developed an amphiphilic branched copolymer with pendant vinyl groups, and it self-assembled with chlorin e6 (Ce6) into nanoparticles to fabricate a GSH-reaction response drug delivery system. The vinyl groups in the hydrophobic core of the nanoparticles were reacted with GSH by a "thio-ene" click reaction to release Ce6; simultaneously, the level of GSH decreased for enhanced PDT. Both in vitro and in vivo studies demonstrated that remarkable PDT efficacy for the nanosystem can be achieved.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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A549 Cells
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Animals
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Antineoplastic Agents / chemical synthesis
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Antineoplastic Agents / chemistry
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Antineoplastic Agents / pharmacology*
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Cell Proliferation / drug effects
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Cell Survival / drug effects
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Chlorophyllides
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Drug Screening Assays, Antitumor
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Glutathione / antagonists & inhibitors*
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Glutathione / metabolism
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Humans
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Materials Testing
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Mice
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Neoplasms, Experimental / diagnostic imaging
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Neoplasms, Experimental / drug therapy
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Neoplasms, Experimental / metabolism
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Particle Size
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Photochemotherapy*
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Photosensitizing Agents / chemical synthesis
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Photosensitizing Agents / chemistry
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Photosensitizing Agents / pharmacology*
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Polymers / chemical synthesis
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Polymers / chemistry
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Polymers / pharmacology
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Porphyrins / metabolism*
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Reactive Oxygen Species / metabolism
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Surface Properties
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Surface-Active Agents / chemical synthesis
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Surface-Active Agents / chemistry
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Surface-Active Agents / pharmacology*
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Vinyl Compounds / chemistry
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Vinyl Compounds / pharmacology
Substances
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Antineoplastic Agents
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Chlorophyllides
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Photosensitizing Agents
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Polymers
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Porphyrins
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Reactive Oxygen Species
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Surface-Active Agents
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Vinyl Compounds
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phytochlorin
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Glutathione