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Ding X, Su Y, Wang C, Zhang F, Chen K, Wang Y, Li M, Wang W. Synergistic Suppression of Tumor Angiogenesis by the Co-delivering of Vascular Endothelial Growth Factor Targeted siRNA and Candesartan Mediated by Functionalized Carbon Nanovectors. ACS Appl Mater Interfaces 2017; 9:23353-23369. [PMID: 28617574 DOI: 10.1021/acsami.7b04971] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Single-walled carbon nanotubes (SWNTs) with unique physicochemical properties have exhibited promising biomedical applications as drug and gene carriers. In this study, polyethylenimine (PEI)-modified SWNT conjugates linked with candesartan (CD) were developed to deliver vascular endothelial growth factor (VEGF)-targeted siRNA (siVEGF) for the synergistic and targeted treatment of tumor angiogenesis. The characterization results revealed that SWNT-PEI-CD conjugates were successfully synthesized and exhibited desirable dispersibility and superior stability. Confocal laser scanning microscopy (CLSM) and flow cytometry (FCM) results showed that SWNT-PEI-CD/siVEGF complexes could achieve high cellular uptake and specific intracellular distribution of siRNA in AT1R overexpressed PANC-1 cells. Strong down-regulation of VEGF was also verified by qualitative real-time polymerase chain reaction, enzyme-linked immunosorbent assay, and Western blot in complex-treated PANC-1 cells. The in vitro angiogenesis assay showed that SWNT-PEI-CD/siVEGF complexes highly inhibited tube formation of human umbilical vein endothelial cells. Furthermore, in vivo observation in PANC-1 xenografted nude mice demonstrated that SWNT-PEI-CD/siVEGF complexes exhibited significant distribution at tumor sites and caused obvious inhibition of tumor growth and tumor-associated angiogenesis repression induced by the drug combination of CD and siVEGF. Finally, a WST-1 assay indicated that SWNT-PEI-CD possessed low cytotoxicity, and a hemolysis test showed good biocompatibility of SWNT-PEI-CD. Hematological and histological analyses confirmed that SWNT-PEI-CD/siVEGF complexes did not cause any obvious toxic effects to blood and major organs. These findings suggested that the SWNT-PEI-CD/siVEGF co-delivery system with tumor-targeting specificity, improved endosomal escaping properties, and collaboration of angiogenesis inhibition could be a prospective method for efficient tumor antiangiogenic therapy.
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Affiliation(s)
- Xuefang Ding
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
- School of Pharmaceutical Science, Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China
| | - Yujie Su
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Cheng Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Fangrong Zhang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Kerong Chen
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Yu Wang
- Department of Pharmacology, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University , 140 Hanzhong Road, Nanjing 210029, China
| | - Min Li
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Wei Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
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