期刊
NANOTECHNOLOGY
卷 29, 期 32, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aac372
关键词
Cu-Ag bimetallic NP; core-shell structure; cancer cell lines; anticancer agent; apoptosis
资金
- Department of Science & Technology (DST), Govt. of India [SR/NM/NS-1461/2014(G)]
- University Grants Commission (UGC), Govt. of India
A simple method of synthesis of a stable bimetallic copper-silver nano-particle (CuAg-NP) was developed by successive reduction of Cu(NO3)(2) and AgNO3, using hydrazine hydrate as the reducing agent and gelatin and poly-vinyl pyrrolidone (PVP) as the capping agents. The round-shaped particles were of a core-shell structure with a core of Cu-0 atoms surrounded by a shell of Ag-0 atoms. The size and the mol. wt. of the NPs were (100 +/- 10) nm and (820 +/- 157) Kd, respectively; the particles were crystalline in nature and 90% of the precursors Cu(NO3)(2) and AgNO3 were converted to the NPs. The particles were more toxic to cancer cells than normal cells; the dose of the NPs (4-5 mu gml(-1)), that killed about 75% of the different human cancer cell lines viz, HepG2 (liver cancer), A549 (lung cancer) and AGS (stomach cancer), killed only about 22.5% of the normal cell lines viz, WRL68 (liver) and WI38 (lung). Therefore, the NP may be developed as a potent anticancer drug in future. The more detailed study on the cytotoxicity of the CuAg-NP on the HepG2 cell line revealed that the particles caused cell cycle arrest in a G2/M phase, depolarization of mitochondrial membrane potential, translocation of phosphatidylserine residues from inner to outer leaflets of cell membrane and DNA degradation; these phenomena confirmed that the NP-induced cell death was apoptotic in nature.
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