1. An upconversion nanoparticle--Zinc phthalocyanine based nanophotosensitizer for photodynamic therapy.
- Author
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Xia L, Kong X, Liu X, Tu L, Zhang Y, Chang Y, Liu K, Shen D, Zhao H, and Zhang H
- Subjects
- Animals, Female, Isoindoles, Mice, Mice, Inbred C57BL, Zinc Compounds, Indoles chemistry, Nanoparticles chemistry, Organometallic Compounds chemistry, Photochemotherapy methods, Photosensitizing Agents chemistry
- Abstract
Recent advances in NIR triggering upconversion-based photodynamic therapy have led to substantial improvements in upconversion-based nanophotosensitizers. How to obtain the high efficiency of singlet oxygen generation under low 980 nm radiation dosage still remains a challenge. A highly efficient nanophotosensitizer, denoted as UCNPs-ZnPc, was constructed for photodynamic therapy, which is based on near infrared (NIR) light upconversion nanoparticle (UCNP) and Zn(II)-phthalocyanine (ZnPc) photosensitizer (PS). The high (1)O2 production efficiency came from the enhancement of the 660 nm upconversion emission of NaYF4:Yb(3+), Er(3+) UCNP with 25% Yb(3+) doping, covalent assemblage of UCNP and ZnPc which significantly shortened the distance and enhanced the energy transfer between the two. The high (1)O2 production led to a secure and efficient PDT treatment, as evidenced by the in vivo test where UCNPs-ZnPc of 50 mg per kg body weight was locally injected into the liver tumor in mice, a low 980 nm radiation dose of 351 J/cm(2) (0.39 W/cm(2)) and short irradiation duration of 15 min were sufficient to perform image-guided PDT and caused the liver tumor inhibitory ratio of approximately 80.1%. Histological analysis revealed no pathological changes and inflammatory response in heart, lung, kidney, liver or spleen., (Copyright © 2014 Elsevier Ltd. All rights reserved.)
- Published
- 2014
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