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Enhanced in vitro and in vivo therapeutic efficacy of codrug-loaded nanoparticles against liver cancer

Authors Li X, Xu H, Dai X, Zhu Z, Liu B, Lu X

Received 10 June 2012

Accepted for publication 9 July 2012

Published 2 October 2012 Volume 2012:7 Pages 5183—5190

DOI https://doi.org/10.2147/IJN.S34886

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Xiaolin Li,1,* Hua’e Xu,2,* Xinzheng Dai,3,4,* Zhenshu Zhu,5 Baorui Liu,6 Xiaowei Lu1

1Department of Geriatrics, 2Department of Pharmacy, the First Affiliated Hospital to Nanjing Medical University, Nanjing; 3Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, 4Liver Transplantation Center, the First Affiliated Hospital to Nanjing Medical University, Nanjing; 5Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing; 6The Comprehensive Cancer Center of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, China

*These authors contributed equally to this work

Abstract: Paclitaxel (Ptx), one of the most widely used anticancer agents, has demonstrated extraordinary activities against a variety of solid tumors. However, the therapeutic response of Ptx is often associated with severe side effects caused by its nonspecific cytotoxic effects and special solvents (Cremophor EL®). The current study reports the stable controlled release of Ptx/tetrandrine (Tet)-coloaded nanoparticles by amphilic methoxy poly(ethylene glycol)–poly(caprolactone) block copolymers. There were three significant findings. Firstly, Tet could effectively stabilize Ptx-loaded nanoparticles with the coencapsulation of Tet and Ptx. The influence of different Ptx/Tet feeding ratios on the size and loading efficiency of the nanoparticles was also explored. Secondly, the encapsulation of Tet and Ptx into nanoparticles retains the synergistic anticancer efficiency of Tet and Ptx against mice hepatoma H22 cells. Thirdly, in the in vivo evaluation, intratumoral administration was adopted to increase the site-specific delivery. Ptx/Tet nanoparticles, when delivered intratumorally, exhibited significantly improved antitumor efficacy; moreover, they substantially increased the overall survival in an established H22-transplanted mice model. Further investigation into the anticancer mechanisms of this nanodelivery system is under active consideration as a part of this ongoing research. The results suggest that Ptx/Tet-coloaded nanoparticles could be a potential useful chemotherapeutic formulation for liver cancer therapy.

Keywords: tetrandrine, paclitaxel, nanoparticle, liver cancer

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