期刊
INTERNATIONAL JOURNAL OF NANOMEDICINE
卷 9, 期 -, 页码 1065-1082出版社
DOVE MEDICAL PRESS LTD
DOI: 10.2147/IJN.S54864
关键词
nanodiamond; drug delivery; sustained release; survival rate; cancer; treatment
资金
- National Natural Science Foundation of China [21071091]
- Shanxi Science and Technology Development Program [20130313021-1]
- Shanxi Provincial Natural Science Foundation [2009011012-3]
- Shanxi Scholarship Council of China [201011]
Background: This study investigated the use of nanodiamond particles (NDs) as a promising material for drug delivery in vivo and in vitro. Methods: HepG2 cells (a human hepatic carcinoma cell line) were used to determine the characteristics of a nanodiamond-doxorubicin complex (ND-DOX) when taken up by cells in vitro using laser scanning confocal microscopy and dialysis experiments. We also compared the survival rate and histopathology of tumor-bearing mice after treatment with NDs or ND-DOX in vivo. Results: In vitro investigation showed that ND-DOX has slow and sustained drug release characteristics compared with free doxorubicin. In vivo, the survival rate of tumor-bearing mice treated with ND-DOX was four times greater than that of mice treated with free doxorubicin. Interestingly, the survival rate in mice treated with NDs alone was close to that of mice treated with free doxorubicin. This indicates that treatment with ND-DOX can prolong the lifespan of tumor-bearing mice significantly compared with conventional doxorubicin and that NDs can have this effect as well. Histopathological analysis showed that neither the NDs nor ND-DOX were toxic to the kidney, liver, or spleen in contrast with the well-known toxic effects of free doxorubicin on the kidney and liver. Further, both the bare NDs and ND-DOX could suppress tumor growth effectively. Conclusion: NDs can potentially prolong survival, and ND-DOX may act as a nanodrug with promising chemotherapeutic efficacy and safety.
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