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Yunyan Chen,1,2 Ziwei Zhang,1,2 Zhilei Qian,3 Rui Ma,1,2 Minna Luan,1,2 Yu Sun1 1School of Pharmacy, Wannan Medical College, Wuhu, 241002, People’s Republic of China; 2Institute of Synthesis and Application of Medical Materials, Wannan Medical College, Wuhu, 241002, People’s Republic of China; 3The Affiliated Brain Hospital of Nanjing Medical University, Nanjing, 210029, People’s Republic of ChinaCorrespondence: Yunyan Chen; Yu Sun, School of Pharmacy, Wannan Medical College, Wuhu, 241002, People’s Republic of China, Tel +86 553 3932492, Email cyy1206@163.com; whsunyu@163.comBackground: A sequential release co-delivery system is an effective strategy to improve anti-cancer efficacy. Herein, multicomponent-based liposomes (TET-CTM/L) loaded with tetrandrine (TET) and celastrol (CEL)-loaded coix seed oil microemulsion (CTM) were fabricated, which showed synergistic anti-liver cancer activities. By virtue of Enhanced Permeability and Retention (EPR) effect, TET-CTM/L can achieve efficient accumulation at the tumor site. TET was released initially to repair abnormal vessels and decrease the fibroblasts, and CTM was released subsequently for eradication of tumor tissue.Methods: TEM (transmission electron microscopy) and DLS (dynamic light scattering) were adopted to characterize the TET-CTM/L. Flow cytometry was adopted to examine the cellular uptake and cytotoxicity of HepG2 cells. The HepG2 xenograft nude mice were adopted to evaluate the anti-tumor efficacy and systemic safety of TET-CTM/L.Results: TEM images of TET-CTM/L showed the structure of small particle size of CTM within large-size liposomes, indicating that CTM can be encapsulated in liposomes by film dispersion method. In in vitro studies, TET-CTM/L induced massive apoptosis toward HepG2 cells, indicating synergistic cytotoxicity against HepG2 cells. In in vivo studies, TET-CTM/L displayed diminished systemic toxicity compared to celastrol or TET used alone. TET-CTM/L showed the excellent potential for tumor-targeting ability in a biodistribution study.Conclusion: Our study provides a new strategy for combining anti-cancer therapy that has good potential not only in the treatment of liver cancer but also can be applied to the treatment of other solid tumors.Keywords: celastrol, tetrandrine, sequentially released liposomes, anti-liver cancer |
