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• W1999910805 abstract "A specialized G-rich DNA structure, G-quadruplex, has been studied for its special physical characteristics and biological effects. Herein we report a novel strategy of using G-quadruplex as a drug carrier to target cancer cells for photodynamic therapy (PDT). A G-quadruplex forming AS1411 aptamer could be physically conjugated with six molecules of porphyrin derivative, 5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin (TMPyP4), to fabricate the apt-TMP complex. The TMPyP4 molecules in the complex were identified to bind tightly to the aptamer by intercalation and outside binding. Because the G-quadruplex structure is known to target the overexpressed nucleolin in cancer cells, in this study, the effect of the G-quadruplex structure as a carrier for the delivery of TMPyP4 into cancer cells by nucleolin-mediated internalization was investigated. The results showed that the apt-TMP complex exhibited a higher TMPyP4 accumulation in MCF7 breast cancer cells than in M10 normal epithelium cells. After treated with light for 180 s, the photodamage in MCF7 cells was larger than in M10 cells. These results indicated that the TMPyP4 delivery and uptake were mediated by the specific interaction of the apt-TMP complex with nucleolin on the cellular surface and that the use of the AS1411 aptamer as a drug carrier may be a potential tactic in cancer therapy." @default.
• W1999910805 created "2016-06-24" @default.
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• W1999910805 date "2010-02-18" @default.
• W1999910805 modified "2023-10-10" @default.
• W1999910805 title "Aptamer-Based Tumor-Targeted Drug Delivery for Photodynamic Therapy" @default.
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• W1999910805 doi "https://doi.org/10.1021/nn901374b" @default.
• W1999910805 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20166743" @default.
• W1999910805 hasPublicationYear "2010" @default.
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