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Shen Y, Li M, Liu T, Liu J, Xie Y, Zhang J, Xu S, Liu H. A dual-functional HER2 aptamer-conjugated, pH-activated mesoporous silica nanocarrier-based drug delivery system provides in vitro synergistic cytotoxicity in HER2-positive breast cancer cells. Int J Nanomedicine 2019; 14:4029-4044. [PMID: 31213813 PMCID: PMC6549788 DOI: 10.2147/ijn.s201688] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 03/20/2019] [Indexed: 12/19/2022] Open
Abstract
Purpose: As well as functioning as a ligand that is selectively internalized by cells overexpressing human epidermal growth factor receptor-2 (HER2), HApt can exert cytotoxic effects by inducing cross-linking and subsequent translocation of HER2 to cytoplasmic vesicles, such downregulation of HER2 inhibits cell proliferation and induces apoptosis. We aimed to exploit the potential of HApt as both a targeting agent and antagonist to maximize the efficacy of mesoporous silica nanoparticle (MSN)-based drug release systems for HER2-positive breast cancer. Materials and methods: We fabricated novel HApt aptamer-functionalized pH-sensitive β-cyclodextrin (β-CD)-capped doxorubicin (DOX)-loaded mesoporous silica nanoparticles (termed MSN-BM/CD-HApt@DOX) for targeted delivery and selective targeting of HER2-positive cells. MSN-functionalized benzimidazole (MSN-BM) was used to load and achieve pH stimuli-responsive release of the chemotherapeutic agent doxorubicin (DOX). β-cyclodextrin was introduced as a gatekeeper for encapsulated DOX and HApt as a selective HER2-targeting moiety and biotherapeutic agent. Results: Physical and chemical characterizations (FT-IR, XRD, TEM and BET) confirmed successful construction of MSN-BM/CD-HApt@DOX nanoparticles. In vitro release assays verified pH-sensitive DOX release. MSN-BM/CD-HApt@DOX (relative DOX concentration, 3.6 μg/mL) underwent HER2-mediated endocytosis and was more cytotoxic to HER2-positive SKBR3 cells than HER2-negative MCF7 cells. MSN-BM/CD-HApt@DOX also exhibited better uptake and stronger growth inhibition in SKBR3 cells than the control MSN-BM/CD-NCApt@DOX functionalized with a scrambled nucleotide sequence on CD. Overall, intracellular delivery of DOX and the biotherapeutic agent HApt resulted in synergistic cytotoxic effects in HER2-positive cancer cells in comparison to either DOX or HApt alone. Conclusion: MSN-BM/CD-HApt@DOX enables HER2-mediated targeting and biotherapeutic effects as well as pH-responsive DOX drug release, resulting in synergistic cytotoxic effects in HER2-overexpressing cells in vitro. This novel nanocarrier could potentially enable specific targeting to improve the efficacy of chemotherapy for HER2-positive cancer.
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Affiliation(s)
- Yinxing Shen
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai200237, People’s Republic of China
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai200032, People’s Republic of China
| | - Mengya Li
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai200237, People’s Republic of China
| | - Tianqi Liu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai200237, People’s Republic of China
| | - Jing Liu
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai200032, People’s Republic of China
| | - Youhua Xie
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai200032, People’s Republic of China
| | - Junqi Zhang
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai200032, People’s Republic of China
| | - Shouhong Xu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai200237, People’s Republic of China
| | - Honglai Liu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai200237, People’s Republic of China
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Li Z, Clemens DL, Lee BY, Dillon BJ, Horwitz MA, Zink JI. Mesoporous Silica Nanoparticles with pH-Sensitive Nanovalves for Delivery of Moxifloxacin Provide Improved Treatment of Lethal Pneumonic Tularemia. ACS Nano 2015; 9:10778-10789. [PMID: 26435204 DOI: 10.1021/acsnano.5b04306] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [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: 06/05/2023]
Abstract
We have optimized mesoporous silica nanoparticles (MSNs) functionalized with pH-sensitive nanovalves for the delivery of the broad spectrum fluoroquinolone moxifloxacin (MXF) and demonstrated its efficacy in treating Francisella tularensis infections both in vitro and in vivo. We compared two different nanovalve systems, positive and negative charge modifications of the mesopores, and different loading conditions-varying pH, cargo concentration, and duration of loading-and identified conditions that maximize both the uptake and release capacity of MXF by MSNs. We have demonstrated in macrophage cell culture that the MSN-MXF delivery platform is highly effective in killing F. tularensis in infected macrophages, and in a mouse model of lethal pneumonic tularemia, we have shown that the drug-loaded MSNs are much more effective in killing F. tularensis than an equivalent amount of free MXF.
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Affiliation(s)
- Zilu Li
- Department of Materials Science and Engineering, ‡Division of Infectious Diseases, Department of Medicine, §Department of Chemistry & Biochemistry, and ∥California NanoSystems Institute, University of California , Los Angeles, California 90095, United States
| | - Daniel L Clemens
- Department of Materials Science and Engineering, ‡Division of Infectious Diseases, Department of Medicine, §Department of Chemistry & Biochemistry, and ∥California NanoSystems Institute, University of California , Los Angeles, California 90095, United States
| | - Bai-Yu Lee
- Department of Materials Science and Engineering, ‡Division of Infectious Diseases, Department of Medicine, §Department of Chemistry & Biochemistry, and ∥California NanoSystems Institute, University of California , Los Angeles, California 90095, United States
| | - Barbara Jane Dillon
- Department of Materials Science and Engineering, ‡Division of Infectious Diseases, Department of Medicine, §Department of Chemistry & Biochemistry, and ∥California NanoSystems Institute, University of California , Los Angeles, California 90095, United States
| | - Marcus A Horwitz
- Department of Materials Science and Engineering, ‡Division of Infectious Diseases, Department of Medicine, §Department of Chemistry & Biochemistry, and ∥California NanoSystems Institute, University of California , Los Angeles, California 90095, United States
| | - Jeffrey I Zink
- Department of Materials Science and Engineering, ‡Division of Infectious Diseases, Department of Medicine, §Department of Chemistry & Biochemistry, and ∥California NanoSystems Institute, University of California , Los Angeles, California 90095, United States
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