Histology and antitumor activity study of PTX-loaded micelle,a fluorescent drug delivery system prepared by PEG-TPP
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摘要
We synthesized PEG-TPP as carrier to encapsulate paclitaxel(PTX) in the form of micelles to overcome its water-solubility problem. PTX-loaded micelles possess a-week stability and appropriate particle size(152.1 ±1.2 nm) which is beneficial for enhanced permeability and retention(EPR) effect. Strong pH dependence of PTX releasing from micelles is verified by in vitro release study. At cellular level, PTXloaded micelles can target mitochondria effectively which may results a better cytotoxicity of micelles(especially IC50= 0.123 ± 0.035 mmol/L of micelles and 0.298 ± 0.067 mmol/L of PTX alone on MCF-7 cells). The fluorescence distributions of both isolated and sliced organs show that the micelles can effectively target tumors. Moreover, we further prove the enhanced therapeutic effects of micelles in tumor-bearing mice comparing with PTX alone. The results show that the biodegradable drug delivery system prepared by PEG-TPP can overcome the poor solubility of paclitaxel and improve its tumor targeting and antitumor activity.
We synthesized PEG-TPP as carrier to encapsulate paclitaxel(PTX) in the form of micelles to overcome its water-solubility problem. PTX-loaded micelles possess a-week stability and appropriate particle size(152.1 ±1.2 nm) which is beneficial for enhanced permeability and retention(EPR) effect. Strong pH dependence of PTX releasing from micelles is verified by in vitro release study. At cellular level, PTXloaded micelles can target mitochondria effectively which may results a better cytotoxicity of micelles(especially IC50= 0.123 ± 0.035 mmol/L of micelles and 0.298 ± 0.067 mmol/L of PTX alone on MCF-7 cells). The fluorescence distributions of both isolated and sliced organs show that the micelles can effectively target tumors. Moreover, we further prove the enhanced therapeutic effects of micelles in tumor-bearing mice comparing with PTX alone. The results show that the biodegradable drug delivery system prepared by PEG-TPP can overcome the poor solubility of paclitaxel and improve its tumor targeting and antitumor activity.
We synthesized PEG-TPP as carrier to encapsulate paclitaxel(PTX) in the form of micelles to overcome its water-solubility problem. PTX-loaded micelles possess a-week stability and appropriate particle size(152.1 ±1.2 nm) which is beneficial for enhanced permeability and retention(EPR) effect. Strong pH dependence of PTX releasing from micelles is verified by in vitro release study. At cellular level, PTXloaded micelles can target mitochondria effectively which may results a better cytotoxicity of micelles(especially IC50= 0.123 ± 0.035 mmol/L of micelles and 0.298 ± 0.067 mmol/L of PTX alone on MCF-7 cells). The fluorescence distributions of both isolated and sliced organs show that the micelles can effectively target tumors. Moreover, we further prove the enhanced therapeutic effects of micelles in tumor-bearing mice comparing with PTX alone. The results show that the biodegradable drug delivery system prepared by PEG-TPP can overcome the poor solubility of paclitaxel and improve its tumor targeting and antitumor activity.
引文
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