Glycyrrhetinic acid-modified chitosan/poly(ethylene glycol) nanoparticles for liver-targeted delivery.


A liver-targeted drug delivery carrier, composed of chitosan/poly(ethylene glycol)-glycyrrhetinic acid (CTS/PEG-GA) nanoparticles, was prepared by an ionic gelation process, in which glycyrrhetinic acid (GA) acted as the targeting ligand. The formation and characterization of these nanoparticles were confirmed by FT-IR, dynamic light scattering (DLS) and zeta potential measurements. The biodistribution of the nanoparticles was assessed by single-photon emission computed tomography (SPECT), and the cellular uptake was evaluated using human hepatic carcinoma cells (QGY-7703 cells). The anti-neoplastic effect of the doxorubicin.HCl-loaded nanoparticles (DOX-loaded nanoparticles) was also investigated in vitro and in vivo. The results showed that the CTS/PEG-GA nanoparticles were remarkably targeted to the liver, and keep at a high level during the experiment. The accumulation in the liver was 51.3% at 3 h after injection; this was nearly 2.6 times that obtained with the CTS/PEG nanoparticles. The DOX-loaded nanoparticles were greatly cytotoxic to QGY-7703 cells, and the IC(50) (50% inhibitory concentration) for the free doxorubicin.HCl (DOX.HCl) and the DOX-loaded CTS/PEG-GA nanoparticles were 47 and 79 ng/mL, respectively. Moreover, the DOX-loaded CTS/PEG-GA nanoparticles could effectively inhibit tumor growth in H22 cell-bearing mice.

DOI: 10.1016/j.biomaterials.2010.02.042

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@article{Tian2010GlycyrrhetinicAC, title={Glycyrrhetinic acid-modified chitosan/poly(ethylene glycol) nanoparticles for liver-targeted delivery.}, author={Qin Tian and Chuang-Nian Zhang and Xiu-hua Wang and Wei Wang and Wei Huang and Rui-Tao Cha and Chun-hong Wang and Zhi Yuan and Min Liu and Hai-ying Wan and Hua Tang}, journal={Biomaterials}, year={2010}, volume={31 17}, pages={4748-56} }