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• W3208524669 endingPage "112529" @default.
• W3208524669 startingPage "112529" @default.
• W3208524669 abstract "This study aimed to synthesize a star-shaped micelle using 3-azido-2,2-bis(azidomethyl)propan-1-ol (pentaerythritol triazide) core, as an initiator for the synthesis of three-arm polylactic acid (PLA) block. Then, the ends of the PLA arms were converted to PLA triazide followed by conjugation to the three alkyne-PEG-maleamide through click reaction. The maleamide ends were available for coupling with sulfhydryl-modified DNA aptamer against epithelial cell adhesion molecule in order to offer targeted delivery of encapsulated drug, camptothecin to the site of action. The successful synthesis of the star-shaped polymers was confirmed via1HNMR. Hydrophobic anti-cancer drug, camptothecin was encapsulated into the micelles core implementing solvent switching method providing loading content (LC%) and encapsulation efficiency (EE%) of 3.7 ± 0.4 and 73.7 ± 8.2, respectively. The size of both non-targeted and aptamer-targeted micelles was determined to be 154 and 192 nm, respectively with polydispersity index below 0.3. In vitro drug release evaluation at 37 °C, pH 7.4 showed a controlled release pattern for camptothecin during 72 h. In vitro cytotoxicity of the prepared non-targeted and targeted micelles was carried out on human colorectal adenocarcinoma (HT29) and mouse colon carcinoma (C26) as EpCAM positive cell lines and Chinese hamster ovary (CHO) as EpCAM negative cell line. The results verified significantly higher cytotoxicity of the targeted micelles on HT29 and C26 cell lines, while no obvious difference was observed between targeted and non-targeted formulation on CHO cell line. The in vivo therapeutic efficiency investigation on BALB/c C26 tumor-bearing mice showed superior capability of the targeted formulation on tumor suppression and survival rate of the treated mice. The developed platform exhibited excellent characteristics to diminish camptothecin drawbacks and its adverse effects while considerably increasing its therapeutic index." @default.
• W3208524669 created "2021-11-08" @default.
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• W3208524669 date "2021-12-01" @default.
• W3208524669 modified "2023-09-27" @default.
• W3208524669 title "Design and synthesis of targeted star-shaped micelle for guided delivery of camptothecin: In vitro and in vivo evaluation" @default.
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• W3208524669 doi "https://doi.org/10.1016/j.msec.2021.112529" @default.
• W3208524669 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34857308" @default.
• W3208524669 hasPublicationYear "2021" @default.
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