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Khaled SZ, Cevenini A, Yazdi IK, Parodi A, Evangelopoulos M, Corbo C, Scaria S, Hu Y, Haddix SG, Corradetti B, Salvatore F, Tasciotti E. One-pot synthesis of pH-responsive hybrid nanogel particles for the intracellular delivery of small interfering RNA. Biomaterials 2016; 87:57-68. [PMID: 26901429 PMCID: PMC4785811 DOI: 10.1016/j.biomaterials.2016.01.052] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 01/25/2016] [Indexed: 12/20/2022]
Abstract
This report describes a novel, one-pot synthesis of hybrid nanoparticles formed by a nanostructured inorganic silica core and an organic pH-responsive hydrogel shell. This easy-to-perform, oil-in-water emulsion process synthesizes fluorescently-doped silica nanoparticles wrapped within a tunable coating of cationic poly(2-diethylaminoethyl methacrylate) hydrogel in one step. Transmission electron microscopy and dynamic light scattering analysis demonstrated that the hydrogel-coated nanoparticles are uniformly dispersed in the aqueous phase. The formation of covalent chemical bonds between the silica and the polymer increases the stability of the organic phase around the inorganic core as demonstrated by thermogravimetric analysis. The cationic nature of the hydrogel is responsible for the pH buffering properties of the nanostructured system and was evaluated by titration experiments. Zeta-potential analysis demonstrated that the charge of the system was reversed when transitioned from acidic to basic pH and vice versa. Consequently, small interfering RNA (siRNA) can be loaded and released in an acidic pH environment thereby enabling the hybrid particles and their payload to avoid endosomal sequestration and enzymatic degradation. These nanoparticles, loaded with specific siRNA molecules directed towards the transcript of the membrane receptor CXCR4, significantly decreased the expression of this protein in a human breast cancer cell line (i.e., MDA-MB-231). Moreover, intravenous administration of siRNA-loaded nanoparticles demonstrated a preferential accumulation at the tumor site that resulted in a reduction of CXCR4 expression.
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Affiliation(s)
- Sm Z. Khaled
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
| | - Armando Cevenini
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
- Department of Molecular Medicine and Medical Biotechnology, University of Naples “Federico II”, Naples, 80131 Italy
- CEINGE-Biotecnologie Avanzate, s.c.a r.l., Naples, 80145 Italy
| | - Iman K. Yazdi
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
- Department of Biomedical Engineering, University of Houston, Houston, Texas, 77204 United States
| | - Alessandro Parodi
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
- Fondazione SDN IRCCS, Naples, 80143 Italy
| | - Michael Evangelopoulos
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
| | - Claudia Corbo
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
- Fondazione SDN IRCCS, Naples, 80143 Italy
| | - Shilpa Scaria
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
| | - Ye Hu
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
| | - Seth G. Haddix
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
| | - Bruna Corradetti
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, 60131 Italy
| | - Francesco Salvatore
- CEINGE-Biotecnologie Avanzate, s.c.a r.l., Naples, 80145 Italy
- Fondazione SDN IRCCS, Naples, 80143 Italy
| | - Ennio Tasciotti
- Department of Regenerative Medicine: Center for Biomimetic Medicine, Houston Methodist Research Institute, Houston, Texas, 77030 United States
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Liao W, Huang X, Ye L, Lan S, Fan H, Qu J. Film-formation of polyacrylate/silica composite latexes by sol-gel process. J Appl Polym Sci 2015. [DOI: 10.1002/app.42417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Wenbo Liao
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Xiangxuan Huang
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Lingyun Ye
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Shanhong Lan
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Hongbo Fan
- School of Chemistry and Environmental Engineering; Dong Guan University of Technology; Dongguan 523808 China
| | - Jinqing Qu
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 China
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