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• W3013849803 abstract "Chemotherapy is the primary treatment for advanced colon cancer, but its efficacy is often limited by severe toxicities. Targeted therapy in the form of selectively drug delivery system (SDDS) is an important strategy to reduce adverse effects. Here, we aim to design a novel SDDS with potential for practical application using biocompatible components and scalable production process, for targeted delivery of doxorubicin (Dox) to colon cancer cells.The SDDS was made of a self-assembled DNA nano-cross (Holliday junction, or HJ) functionalized by four AS1411 aptamers (Apt-HJ) and loaded with Dox.Apt-HJ had an average size of 12.45 nm and a zeta potential of -11.6 mV. Compared with the monovalent AS1411 aptamer, the quadrivalent Apt-HJ showed stronger binding to target cancer cells (CT26). A complex of Apt-HJ and doxorubicin (Apt-HJ-Dox) was formed by intercalating Dox into the DNA structure of Apt-HJ, with each complex carrying approximately 17 Dox molecules. Confocal microscopy revealed that Apt-HJ-Dox selectively delivered Dox into CT26 colon cancer cells but not the control cells. Moreover, Apt-HJ-Dox achieved targeted killing of CT26 cancer cells in vitro and reduced the damage to control cells. Importantly, compared with free Dox, Apt-HJ-Dox significantly enhanced the antitumor efficacy in vivo without boosting the adverse effects.These results suggest that Apt-HJ-Dox has application potential in targeted treatment of colon cancer." @default.
• W3013849803 created "2020-04-03" @default.
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• W3013849803 date "2020-03-01" @default.
• W3013849803 modified "2023-10-06" @default.
• W3013849803 title "<p>Targeted Therapy of Colon Cancer by Aptamer-Guided Holliday Junctions Loaded with Doxorubicin</p>" @default.
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• W3013849803 doi "https://doi.org/10.2147/ijn.s240083" @default.
• W3013849803 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7125415" @default.
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