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Journal Article
Research Support, Non-U.S. Gov't
Nano-formulation of a photosensitizer using a DNA tetrahedron and its potential for in vivo photodynamic therapy.
Biomaterials Science 2016 April
Photodynamic therapy (PDT) is a cytotoxic treatment using singlet oxygen produced by photosensitizers. Approved porphyrinoid PDT still suffers from a lack of robust production methods and low water solubility. Methylene blue (MB) is a good candidate for the PDT drug, because the dye is an effective photosensitizer, can be easily synthesized, and is already being used in other clinical fields. However, its poor cell/tissue penetration and low stability against the reducible biological conditions should be addressed by using a proper delivery vehicle. Here, we employed a DNA tetrahedron, a self-assembled nanostructure as the carrier for intracellular delivery of MB by taking advantage of the DNA binding property of the photosensitizer and demonstrated photo-induced cytotoxicity by the MB delivered by the DNA nanocarrier. We also evaluated the PDT potency of the MB-loaded DNA nanoconstruct in vivo tumor model to suppress tumor growth.
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