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- W2766964027 abstract "To prevent bone metastasis, we developed polyethylene glycol (PEG)-conjugated aspartic acid (Asp)-modified liposomes (PEG-Asp-Lipo) as a bone-targeting carrier of paclitaxel (PTX) by using Asp-modified 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE-Asp). The affinity of Asp-modified liposomes to hydroxyapatite increased as the concentration of DPPE-Asp increased. The bone accumulation of [3H]-labeled PEG(2)-Asp(33)-Lipo was approximately 24.6% 360 min after intravenous injection in mice, in contrast to 5.4% and 6.7% of [3H]-labeled normal Lipo and PEG(2)-Lipo, respectively. Similarly, [14C]-labeled PTX encapsulated into PEG(2)-Asp(33)-Lipo predominantly accumulated in the bone. Furthermore, using an in situ imaging experiment, we observed that near-infrared fluorescence-labeled PEG(2)-Asp(33)-Lipo selectively accumulated in the bone near the joint after intravenous injection in mice. We also found that FITC-labeled PEG(2)-Asp(33)-Lipo predominantly accumulated on eroded and quiescent bone surfaces. In a bone metastatic tumor mouse model, in which B16-BL6/Luc cells were injected into the left ventricle of female C57BL/6 mice, metastatic bone tumor growth was significantly inhibited by an intravenous injection of PEG(2)-Asp(33)-liposomal PTX. In contrast, PEGylated liposomal PTX hardly affected the growth of metastatic bone tumors. These findings indicate that PEG(2)-Asp(33)-Lipo is a promising bone-targeting carrier for the delivery of PTX and treatment of bone metastasis." @default.
- W2766964027 created "2017-11-10" @default.
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- W2766964027 date "2018-02-01" @default.
- W2766964027 modified "2023-09-27" @default.
- W2766964027 title "Development of PEGylated aspartic acid-modified liposome as a bone-targeting carrier for the delivery of paclitaxel and treatment of bone metastasis" @default.
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- W2766964027 doi "https://doi.org/10.1016/j.biomaterials.2017.10.053" @default.
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