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• W1982146445 abstract "The efficacy of a drug is dependent on its mode of delivery and its potency at the tumor site. In this study, the drug delivery and efficacy of silk fibroin coated liposomes (SF-ELP), encapsulating a receptor tyrosine kinase inhibitor, emodin, on Her2/neu over-expressing breast cancer cells, was investigated. This study demonstrates that SF-ELP was more efficacious in suppressing the growth of Her2/neu over-expressing breast cancer cells MDA-MB-453 and BT-474 as compared to uncoated emodin loaded liposomes (ELP). Reduced levels of phosphorylated Her2/neu correlated with growth inhibition observed in the MDA-MB-453 cells, treated with both ELP and SF-ELP. ELP treatment of MDA-MB-453 breast cancer cells resulted in inhibition of the PI3K pathway whereas SF-ELP treatment inhibited both the PI3K and MAPK pathways, which contributed to the enhanced growth inhibitory effects of Her2/neu over-expressing breast cancer cells. Coating of ELP with silk fibroin did not alter the target specificity of emodin, on the other hand the emodin efficacy was enhanced. Higher uptake of emodin delivered by SF-ELP lead to increased cell death as compared to emodin delivery via ELP. Silk fibroin coating around the liposome imparts an extra layer that emodin has to extravasate in order to release from the encapsulating liposome. This increases retention of the drug in the cell for a longer time and protects emodin from quick release and metabolism. Longer intracellular retention may lead to the longer availability of emodin for down-modulation of various Her2/neu pathways. This study demonstrates that silk fibroin coating enhanced emodin delivery in Her2/neu over-expressing breast cancer cells thereby increasing the overall efficacy of the drug." @default.
• W1982146445 created "2016-06-24" @default.
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• W1982146445 date "2007-08-01" @default.
• W1982146445 modified "2023-10-17" @default.
• W1982146445 title "Silk fibroin mediated delivery of liposomal emodin to breast cancer cells" @default.
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• W1982146445 doi "https://doi.org/10.1016/j.ijpharm.2007.03.043" @default.
• W1982146445 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17499461" @default.
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