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Li N, Cui W, Cong P, Tang J, Guan Y, Huang C, Liu Y, Yu C, Yang R, Zhang X. Biomimetic inorganic-organic hybrid nanoparticles from magnesium-substituted amorphous calcium phosphate clusters and polyacrylic acid molecules. Bioact Mater 2021; 6:2303-2314. [PMID: 33553817 PMCID: PMC7841502 DOI: 10.1016/j.bioactmat.2021.01.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 12/09/2020] [Accepted: 01/06/2021] [Indexed: 02/06/2023] Open
Abstract
Amorphous calcium phosphate (ACP) has been widely found during bone and tooth biomineralization, but the meta-stability and labile nature limit further biomedical applications. The present study found that the chelation of polyacrylic acid (PAA) molecules with Ca2+ ions in Mg-ACP clusters (~2.1 ± 0.5 nm) using a biomineralization strategy produced inorganic-organic Mg-ACP/PAA hybrid nanoparticles with better thermal stability. Mg-ACP/PAA hybrid nanoparticles (~24.0 ± 4.8 nm) were pH-responsive and could be efficiently digested under weak acidic conditions (pH 5.0–5.5). The internalization of assembled Mg-ACP/PAA nanoparticles by MC3T3-E1 cells occurred through endocytosis, indicated by laser scanning confocal microscopy and cryo-soft X-ray tomography. Our results showed that cellular lipid membranes remained intact without pore formation after Mg-ACP/PAA particle penetration. The assembled Mg-ACP/PAA particles could be digested in cell lysosomes within 24 h under weak acidic conditions, thereby indicating the potential to efficiently deliver encapsulated functional molecules. Both the in vitro and in vivo results preliminarily demonstrated good biosafety of the inorganic-organic Mg-ACP/PAA hybrid nanoparticles, which may have potential for biomedical applications. Mg-ACP/PAA hybrid nanoparticles have been synthesized following a biomineralization strategy. The chelation of PAA molecules in synergy with Mg2+ substitution improves thermal stability of Mg-ACP/PAA nanoparticles. The Mg-ACP/PAA nanoparticles are pH sensitive and can be digested in cell lysosomes within 24 h.
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Affiliation(s)
- Na Li
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Wei Cui
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Peifang Cong
- Department of Emergency Medicine, General Hospital of Northern Theater Command, Shenyang, Liaoning, 110016, China
| | - Jie Tang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Yong Guan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Caihao Huang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yunen Liu
- Department of Emergency Medicine, General Hospital of Northern Theater Command, Shenyang, Liaoning, 110016, China
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Rui Yang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xing Zhang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
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Shin K, Acri T, Geary S, Salem AK. Biomimetic Mineralization of Biomaterials Using Simulated Body Fluids for Bone Tissue Engineering and Regenerative Medicine<sup/>. Tissue Eng Part A 2017; 23:1169-1180. [PMID: 28463603 DOI: 10.1089/ten.tea.2016.0556] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Development of synthetic biomaterials imbued with inorganic and organic characteristics of natural bone that are capable of promoting effective bone tissue regeneration is an ongoing goal of regenerative medicine. Calcium phosphate (CaP) has been predominantly utilized to mimic the inorganic components of bone, such as calcium hydroxyapatite, due to its intrinsic bioactivity and osteoconductivity. CaP-based materials can be further engineered to promote osteoinductivity through the incorporation of osteogenic biomolecules. In this study, we briefly describe the microstructure and the process of natural bone mineralization and introduce various methods for coating CaP onto biomaterial surfaces. In particular, we summarize the advantages and current progress of biomimetic surface-mineralizing processes using simulated body fluids for coating bone-like carbonated apatite onto various material surfaces such as metals, ceramics, and polymers. The osteoinductive effects of integrating biomolecules such as proteins, growth factors, and genes into the mineral coatings are also discussed.
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Affiliation(s)
- Kyungsup Shin
- 1 Department of Orthodontics, College of Dentistry and Dental Clinics, University of Iowa , Iowa City, Iowa
| | - Timothy Acri
- 2 Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa , Iowa City, Iowa
| | - Sean Geary
- 2 Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa , Iowa City, Iowa
| | - Aliasger K Salem
- 2 Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa , Iowa City, Iowa
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