Journal
BIOMATERIALS SCIENCE
Volume 7, Issue 11, Pages 4782-4789Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9bm00590k
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Funding
- National Key Research and Development Program of China [2017YFA0205400]
- NSFC (the Natural Science Foundation of China) [81603043, 81473146]
- Open Fund of State Key Laboratory of Natural Medicines [SKLNMKF201608]
- Central Fundamental Research Funds for the Central Universities
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Doxorubicin (DOX) liposome is a widely used nano-medicine for colorectal cancer treatment. However, doxorubicin therapy increases the level of reactive oxygen species (ROS) in tumor cells, such as hydrogen peroxide (H2O2), which can stabilize hypoxia-inducible-factor-1 alpha (HIF-1 alpha). In a tumor hypoxic microenvironment, HIF-1 can up-regulate tumor-resistance related proteins, including P-glycoprotein (P-gp), glucose transporter 1 (GLUT-1), and matrix metalloproteinase 9 (MMP-9), leading to tumor tolerance to chemotherapy. The functional inhibition of HIF-1 can overcome this resistance and enhance the efficacy of tumor therapy. Here, we encapsulated one of the most effective HIF-1 inhibitors, acriflavine (ACF), and DOX in liposomes (DOX-ACF@Lipo) to construct bifunctional liposomes. ACF and DOX, released from DOX-ACF@Lipo, could effectively suppress the function of HIF-1 and the process of DNA replication, respectively. Consequently, the bifunctional liposome has great potential to be applied in clinics to overcome chemotherapy resistance induced by hypoxia.
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