Shan X, Yu W, Ni X, Xu T, Lei C, Liu Z, Hu X, Zhang Y, Cai B, Wang B. Effect of Chitosan Magnetic Nanoparticles Loaded with Ang2-siRNA Plasmids on the Growth of Melanoma Xenografts in Nude Mice.
Cancer Manag Res 2020;
12:7475-7485. [PMID:
32904466 PMCID:
PMC7455758 DOI:
10.2147/cmar.s250479]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 07/29/2020] [Indexed: 12/12/2022] Open
Abstract
Purpose
Angiopoietin-2 (Ang-2) has been proven to be a potential agent for malignant cancer treatment. The aim of the current study was to investigate the inhibitory effects of chitosan magnetic nanoparticles (CMNPs) loaded with Ang-2 small interfering RNA (Ang2-siRNA) plasmids (Ang2-CMNPs) on malignant melanoma.
Materials and Methods
Melanoma-bearing nude mice were treated with Ang2-CMNPs and control CMNPs. Tumor volumes in each group were recorded. Real-time fluorescence quantitative-PCR was used to measure the relative Ang-2gene expression. Angiogenesis and Ang-2 expression in tumors were measured by immunohistochemistry. Cell apoptosis in each group was measured by TUNEL staining, and the expression of Bax, Bcl-2 and cleaved caspase-3 was analyzed by immunohistochemistry.
Results
The progression of melanoma was significantly inhibited by Ang2-CMNP treatment. Ang2-CMNP treatment efficiently inhibited tumor growth and in-situ Ang-2 expression compared with those of the control group. Furthermore, Ang2-CMNP treatment significantly inhibited tumor angiogenesis and promoted cell apoptosis by regulating the Bax/Bcl-2 ratio and increasing cleaved caspase-3 expression in vivo.
Conclusion
In summary, Ang2-CMNP treatment increased the regression of normal-appearing vessels in the tumor microenvironment and induced the melanoma cells apoptosis through the mitochondrial apoptotic pathway, suggesting the potential clinical use of Ang2-CMNPs in malignant melanoma treatment.
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