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Journal of Chinese Pharmaceutical Sciences ›› 2021, Vol. 30 ›› Issue (3): 189-205.DOI: 10.5246/jcps.2021.03.015

• Original articles •     Next Articles

Riboflavin-modified lipo-polyplexes co-delivering CXCR4 siRNA and doxorubicin for treatment of highly metastatic cancer

Kaisen Li1,2, Rudong Wang1,2, Yiwei Peng1,2, Dawen Dong3, Xianrong Qi1,2,*()   

  1. 1 Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
    2 Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery System, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
    3 State Key Laboratory of Advanced Pharmaceutical Formulation with High Technology, Yangtze River Pharmaceutical Group, Jiangsu 225300, China
  • Received:2020-09-05 Revised:2020-10-11 Accepted:2020-11-16 Online:2021-03-29 Published:2021-03-29
  • Contact: Xianrong Qi

Abstract:

SDF-1/CXCR4 has been recognized as one of the most relevant chemokine signaling pathways to cancer metastasis, and siRNA targeting CXCR4 may provide potential improvements to treat those highly metastatic cancers, especially when combined with chemotherapy. In the present study, we constructed riboflavin-modified lipo-polyplexes to co-deliver CXCR4 siRNA and doxorubicin for cancer therapy. Doxorubicin was covalently conjugated to polyethyleneimine (PEI) with acid-cleavable hydrazine bond, and the obtained acid-sensitive conjugate was efficiently condensed with siRNA to form polyplexes, which were further coated with riboflavin-tailed lipid-membrane to prepare the lipo-polyplexes conveniently. Utilizing the fact that tumor cells overexpress riboflavin receptors, the riboflavin modification effectively enhanced uptake of lipo-polyplexes by tumor cells in a receptor-mediated manner. The riboflavin-modified lipo-polyplexes co-delivering CXCR4 siRNA and doxorubicin effectively decreased viability and invasiveness of tumor cells in vitro, and inhibited primary tumor growth and tumor metastasis in vivo.

Key words: Riboflavin, Lipo-polyplexes, Co-delivery, SiRNA, Doxorubicin

Supporting: