Volume 57, Issue 50 pp. 16354-16358
Communication

Enhancing the Efficacy of Photodynamic Therapy through a Porphyrin/POSS Alternating Copolymer

Jianqiu Jin

Jianqiu Jin

Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Specially Functional Polymeric Materials and Related Technology of the Ministry of Education, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237 China

These authors contributed equally to this work.

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Yucheng Zhu

Yucheng Zhu

Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Specially Functional Polymeric Materials and Related Technology of the Ministry of Education, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237 China

These authors contributed equally to this work.

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Dr. Zhenghe Zhang

Dr. Zhenghe Zhang

Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Specially Functional Polymeric Materials and Related Technology of the Ministry of Education, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237 China

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Prof. Weian Zhang

Corresponding Author

Prof. Weian Zhang

Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Specially Functional Polymeric Materials and Related Technology of the Ministry of Education, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237 China

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First published: 14 October 2018
Citations: 107

Graphical Abstract

Nanoparticles formed by self-assembly of amphiphilic block copolymers were investigated for their potential application in photodynamic therapy. The porphyrin-containing polymeric nanoparticles display high photochemical yield and phototoxicity in vitro and in vivo, thus providing a novel strategy to enhance the PDT efficacy.

Abstract

Aggregation-induced quenching (AIQ) of photosensitizers greatly reduces the quantum yield of singlet oxygen generation and mitigates the efficacy of photodynamic therapy (PDT). We have prepared an alternating copolymer starting from 4-vinylbenzyl-terminated tetraphenylporphyrin (VBTPP) and maleimide isobutyl polyhedral oligomeric silsesquioxane (MIPOSS), via alternating reversible addition–fragmentation chain transfer (RAFT) polymerization. Porphyrin and POSS are installed on the amphiphilic block copolymers backbone in an alternating fashion and POSS completely inhibits the aggregation of porphyrin units via stacking. The amphiphilic block copolymer can self-assemble into nanoparticles and its application in PDT treatment was tested. These porphyrin-containing polymeric nanoparticles display high photochemical yield and phototoxicity in vitro and in vivo, providing a novel strategy to enhance the PDT efficacy.

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