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Mater Sci Eng C Mater Biol Appl. 2016 Jul 1;64:124-132. doi: 10.1016/j.msec.2016.03.080. Epub 2016 Mar 25.

Antitumor drug effect of betulinic acid mediated by polyethylene glycol modified liposomes.

Author information

1
Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No. 438 Hebei Street, Qinhuangdao 066004, China.
2
Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No. 438 Hebei Street, Qinhuangdao 066004, China. Electronic address: dwgao@ysu.edu.cn.

Abstract

Betulinic acid (BA), as a natural pentacyclic lupine-type triterpene, principally derives from bark of white birch, due to its potent pharmacological properties and low side-effect, which has been demonstrated a prominent efficiency on cancer therapy. However, the poor solubility and low bioavailability limit its pharmaceutical effect. Herein, we reported the rapid efficient synthesis of the polyethylene glycol modified (PEGylated) BA liposomes using ethanol injection technique for the first time. In the study, hydrophobic BA was encapsulated in the lipid bilayer of liposomes, meanwhile hydrophilic PEG layer covered the surface of liposomes. The mean diameter of PEGylated BA liposomes was 142nm, which can effectively accumulate in the tumor tissues. In vitro drug release study showed that the PEGylated BA liposomes had a better sustained drug release effect than BA liposomes. The PEGylated BA liposomes also exhibited a better tumor inhibitory effect compared with those of free BA or BA liposomes in vitro and in vivo experiments. Therefore, the PEGylated BA liposomes could serve as a better alternative for the cancer therapy in future.

KEYWORDS:

Antitumor; Betulinic acid; Liposome; Polyethylene glycol; Sustained release

PMID:
27127036
DOI:
10.1016/j.msec.2016.03.080
[Indexed for MEDLINE]

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