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Biomaterials. 2018 Dec;187:18-26. doi: 10.1016/j.biomaterials.2018.09.041. Epub 2018 Sep 28.

Mesenchymal stem cell-driven activatable photosensitizers for precision photodynamic oncotherapy.

Author information

1
Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, South Korea.
2
Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 143-701, South Korea.
3
Department of Biotechnology, CHA University, Seongnam 13488, South Korea.
4
Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 143-701, South Korea. Electronic address: stemchung@gmail.com.
5
Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 143-701, South Korea. Electronic address: stemness@gmail.com.
6
Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, South Korea. Electronic address: jyoon@ewha.ac.kr.

Abstract

Precise targeting with minimal side effects is of particular interest for personalized medicine, although it remains a challenge. Herein, we demonstrate precision photodynamic therapy (PDT) utilizing human mesenchymal stem cells (MSCs) as cellular vehicles to deliver a new activatable photosensitizer (PcS). In vivo real-time optical imaging tests indicated that PcS-loaded MSCs possess excellent tumor-homing properties. More importantly, dye transfer assays confirm that MSCs precisely transfer PcS into human colon cancer cells (HCT116) via the "bystander effect." Upon localized light irradiation, the growth of intraperitoneal xenograft tumors was significantly inhibited by the photodynamic effect. These findings represent a promising strategy for precise oncotherapy.

KEYWORDS:

Activatable photosensitizer; Mesenchymal stem cells; Photodynamic therapy; Precision medicine; Tumor targeting

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