Zhen Li, Qixian Chen, Yan Qi, Zhihao Liu, Tangna Hao, Xiaoxin Sun, Mingxi Qiao, Xiaodong Ma, Ting Xu, Xiuli Zhao, Chunrong Yang, Dawei Chen
Index: 10.1021/acs.biomac.8b00213
Full Text: HTML
A multifunctional nanoparticulate system composed of methoxy poly(ethylene glycol)-poly(l-histidine)-d-α-vitamin E succinate (MPEG-PLH-VES) copolymers for encapsulation of doxorubicin (DOX) was elaborated with the aim of circumventing the multidrug resistance (MDR) in breast cancer treatment. The MPEG-PLH-VES nanoparticles (NPs) were subsequently functionalized with biotin motif for targeted drug delivery. The MPEG-PLH-VES copolymer exerts no obvious effect on the P-gp expression level of MCF-7/ADR but exhibited a significant influence on the loss of mitochondrial membrane potential, the reduction of intracellular ATP level, and the inhibition of P-gp ATPase activity of MCF-7/ADR cells. The constructed MPEG-PLH-VES NPs exhibited an acidic pH-induced increase on particle size in aqueous solution. The DOX-encapsulated MPEG-PLH-VES/biotin-PEG-VES (MPEG-PLH-VES/B) NPs were characterized to possess high drug encapsulation efficiency of approximate 90%, an average particle size of approximately 130 nm, and a pH-responsive drug release profile in acidic milieu. Confocal laser scanning microscopy (CLSM) investigations revealed that the DOX-loaded NPs resulted in an effective delivery of DOX into MCF-/ADR cells and a notable carrier-facilitated escape from endolysosomal entrapment. Pertaining to the in vitro cytotoxicity evaluation, the DOX-loaded MPEG-PLH-VES/B NPs resulted in more pronounced cytotoxicity to MCF-/ADR cells compared with DOX-loaded MPEG-PLH-VES NPs and free DOX solution. In vivo imaging study in MCF-7/ADR tumor-engrafted mice exhibited that the MPEG-PLH-VES/B NPs accumulated at the tumor site more effectively than MPEG-PLH-VES NPs due to the biotin-mediated active targeting effect. In accordance with the in vitro results, DOX-loaded MPEG-PLH-VES/B NPs showed the strongest inhibitory effect against the MCF-7/ADR xenografted tumors with negligible systemic toxicity, as evidenced by the histological analysis and change of body weight. The multifunctional MPEG-PLH-VES/B nanoparticulate system has been demonstrated to provide a promising strategy for efficient delivery of DOX into MCF-7/ADR cancerous cells and reversing MDR.
3D Protein-Based Bilayer Artificial Skin for the Guided Scar...
2018-04-18 [10.1021/acs.biomac.7b01807] |
A Dual-Targeting Delivery System for Effective Genome Editin...
2018-04-16 [10.1021/acs.biomac.8b00511] |
Salt- and pH-Triggered Helix–Coil Transition of Ionic Polype...
2018-04-16 [10.1021/acs.biomac.8b00204] |
Allosteric Control of Peroxidase-Mimicking DNAzyme Activity ...
2018-04-13 [10.1021/acs.biomac.8b00201] |
Photo- and Reduction-Responsive Polymersomes for Programmed ...
2018-04-12 [10.1021/acs.biomac.8b00253] |
Home | MSDS/SDS Database Search | Journals | Product Classification | Biologically Active Compounds | Selling Leads | About Us | Disclaimer
Copyright © 2024 ChemSrc All Rights Reserved