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Chen J, Zhao Q, Tang J, Lei X, Zhang J, Li Y, Li J, Li Y, Zuo Y. Enzyme-Activated Biomimetic Vesicles Confining Mineralization for Bone Maturation. ACS APPLIED MATERIALS & INTERFACES 2024; 16:33005-33020. [PMID: 38900067 DOI: 10.1021/acsami.4c03978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Inspired by the crucial role of matrix vesicles (MVs), a series of biomimetic vesicles (BVs) fabricated by calcium glycerophosphate (CaGP) modified polyurethane were designed to mediate the mineralization through in situ enzyme activation for bone therapy. In this study, alkaline phosphatase (ALP) was harbored in the porous BVs by adsorption (Ad-BVs) or entrapment (En-BVs). High encapsulation of ALP on En-BVs was effectively self-activating by calcium ions of CaGP-modified PU that specifically hydrolyzed the organophosphorus (CaGP) to inorganic phosphate, thus promoting the formation of the highly oriented bone-like apatite in vitro. Enzyme-catalyzed kinetics confirms the regulation of apatite crystallization by the synergistic action of self-activated ALP and the confined microcompartments of BVs. This leads to a supersaturated microenvironment, with the En-BVs group exhibiting inorganic phosphate (Pi) levels 4.19 times higher and Ca2+ levels 3.67 times higher than those of simulated body fluid (SBF). Of note, the En-BVs group exhibited excellent osteo-inducing differentiation of BMSCs in vitro and the highest maturity with reduced bone loss in rat femoral defect in vivo. This innovative strategy of biomimetic vesicles is expected to provide valuable insights into the enzyme-activated field of bone therapy.
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Affiliation(s)
- Jieqiong Chen
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
| | - Qing Zhao
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
| | - Jiajing Tang
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
| | - Xiaoyu Lei
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
| | - Jinzheng Zhang
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
| | - Yuping Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
| | - Jidong Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
| | - Yubao Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
| | - Yi Zuo
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, 610064, PR China
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Zhang Z, Cui Z, Zhang J, Zheng H, Zhou Z, Wu Z, Wang Z, Fu B. Remineralizing effects of hydroxypropyl methylcellulose film-loaded amorphous calcium phosphate nanoprecursors on enamel artificial caries lesions. J Mech Behav Biomed Mater 2024; 151:106408. [PMID: 38244421 DOI: 10.1016/j.jmbbm.2024.106408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/22/2024]
Abstract
OBJECTIVES This study was to investigate hydroxypropyl methylcellulose (HPMC) film as a carrier for amorphous fluorinated calcium phosphate (AFCP) nanoprecursors to continuously deliver biomimetic remineralization of enamel artificial caries lesions (ACL). MATERIALS AND METHODS The AFCP/HPMC films were comprised of 25 wt% AFCP nanoparticles and 75 wt% HPMC. They were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and biocompatibility tests. Forty enamel ACL were prepared and randomly divided into four groups (n = 10): The enamel surfaces were covered with a pure HPMC film, Tooth Mousse Plus (contains 10% CPP-ACP and 0.2% NaF), and AFCP/HPMC film, or without any things (serving as negative control). Subsequently, all samples were alternatively kept in artificial saliva and a modified pH-cycling before they were characterized by Micro-CT, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), attenuated total reflectance (ATR)-FTIR, XRD, and nanoindentation. RESULTS After the enamel ACL was challenged by pH cycling, Tooth Mousse Plus and AFCP/HPMC film groups exhibited less lesion depth and mineral loss than the negative control and pure HPMC film groups. Additionally, the AFCP/HPMC film group revealed a highest remineralization rate of 55.34 ± 3.10 % among the all groups (p < 0.001). The SEM findings showed that the enamel ACL were densely deposited with minerals in the AFCP/HPMC film group, and the EDX results suggested a higher content of fluorine in the remineralized tissues. In particular, the AFCP/HPMC film group exhibited the best nanomechanical performance after 2 weeks of pH cycling (p < 0.05), with the hardness (H) restored from 0.29 ± 0.19 to 2.69 ± 0.70 GPa, and elastic modulus (Er) restored from 10.77 ± 5.30 to 68.83 ± 12.72 GPa. CONCLUSION The AFCP/HPMC film might be used as a promising strategy for arresting or reversing incipient enamel caries lesions.
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Affiliation(s)
- Zhixin Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, 310000, China; Department of Stomatology, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou, 362000, Fujian, China.
| | - Zihan Cui
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, 310000, China
| | - Jianping Zhang
- Department of Orthopaedics, The 909th Hospital, School of Medicine, Xiamen University, Zhangzhou, 363000, Fujian, China
| | - Haiyan Zheng
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, 310000, China
| | - Zihuai Zhou
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, 310000, China
| | - Zhifang Wu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, 310000, China
| | - Zhe Wang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, 310000, China.
| | - Baiping Fu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, 310000, China.
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Biomimetic Construction of the Enamel-like Hierarchical Structure. Chem Res Chin Univ 2023. [DOI: 10.1007/s40242-023-2336-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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4
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Gleeson SE, Kim S, Yu T, Marcolongo M, Li CY. Insight on the Role of Poly(acrylic acid) for Directing Calcium Phosphate Mineralization of Synthetic Polymer Bone Scaffolds. ACS APPLIED BIO MATERIALS 2022; 5:4493-4503. [PMID: 36044781 DOI: 10.1021/acsabm.2c00583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bone is a complex tissue with robust mechanical and biological properties originating from its nanoscale composite structure. Although much research has been conducted on designing bioinspired artificial bone, the role of biological macromolecules such as noncollagenous proteins (NCPs) in influencing the formation of biominerals is not fully understood. In this work, we have designed nanofiber shish-kebab (NFSK) structures that can template mineral location by recruiting calcium cations from an ion-rich mineralization solution. Poly(acrylic acid) (PAA) is used as the NCP analogue to understand the role of polyelectrolytes in scaffold mineralization. We demonstrate that the addition of PAA in the mineralization solution suppresses the development of extrafibrillar minerals as well as slows down the accumulation and development of mineral phases within NFSKs. We probe the mechanism behind this effect by monitoring the free calcium ion concentration, investigating the PAA molecular weight effect, and conducting mineralization in membrane-partitioned solutions. Our results suggest the 2-fold effect of PAA as a solution stabilizer and physical barrier on the NFSK surface. This work could shed light on the understanding of the NCP effect in biomineralization.
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Affiliation(s)
- Sarah E Gleeson
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Seyong Kim
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Tony Yu
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Michele Marcolongo
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
- Department of Mechanical Engineering, Villanova University, Villanova, Pennsylvania 19085, United States
| | - Christopher Y Li
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
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5
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Xue Z, Wang X, Xu D. Molecular investigations of the prenucleation mechanism of bone-like apatite assisted by type I collagen nanofibrils: insights into intrafibrillar mineralization. Phys Chem Chem Phys 2022; 24:18931-18942. [PMID: 35916012 DOI: 10.1039/d2cp02573f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bone is a typical inorganic-organic composite material with a multilevel hierarchical organization. In the lowest level of bone tissue, inorganic minerals, which are mainly composed of hydroxyapatite, are mineralized within the type I collagen fibril scaffold. Understanding the crystal prenucleation mechanism and growth of the inorganic phase is particularly important in the design and development of materials with biomimetic nanostructures. In this study, we built an all-atom human type I collagen fibrillar model with a 67 nm overlap/gap D-periodicity. Arginine residues were shown to serve as the dominant cross-linker to stabilize the fibril scaffold. Subsequently, the prenucleation mechanism of collagen intrafibrillar mineralization was investigated using a molecular dynamics approach. Considering the physiological pH of the human body (i.e., ∼7.4), HPO42- was initially used to simulate the protonation state of the phosphate ions. Due to the spatially constrained effects resulting from the overlap/gap structure of the collagen fibrils, calcium phosphate clusters formed mainly inside the hole zone but with different spatial distributions along the long axis direction; this indicated that the nucleation of calcium phosphate may be highly site-selective. Furthermore, the model containing both HPO42- and PO43- in the solution phase formed significantly larger clusters without any change in the nucleation sites. This phenomenon suggests that the existence of PO43- is beneficial for the mineralization process, and so the conversion of HPO42- to PO43- was considered a critical step during mineralization. Finally, we summarize the nucleation mechanism for collagen intrafibrillar mineralization, which could contribute to the fabrication of mineralized collagen biomimetic materials.
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Affiliation(s)
- Zhiyu Xue
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, P. R. China.
| | - Xin Wang
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, P. R. China.
| | - Dingguo Xu
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, P. R. China.
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Bohner M, Maazouz Y, Ginebra MP, Habibovic P, Schoenecker JG, Seeherman H, van den Beucken JJ, Witte F. Sustained local ionic homeostatic imbalance caused by calcification modulates inflammation to trigger heterotopic ossification. Acta Biomater 2022; 145:1-24. [PMID: 35398267 DOI: 10.1016/j.actbio.2022.03.057] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 12/15/2022]
Abstract
Heterotopic ossification (HO) is a condition triggered by an injury leading to the formation of mature lamellar bone in extraskeletal soft tissues. Despite being a frequent complication of orthopedic and trauma surgery, brain and spinal injury, the etiology of HO is poorly understood. The aim of this study is to evaluate the hypothesis that a sustained local ionic homeostatic imbalance (SLIHI) created by mineral formation during tissue calcification modulates inflammation to trigger HO. This evaluation also considers the role SLIHI could play for the design of cell-free, drug-free osteoinductive bone graft substitutes. The evaluation contains five main sections. The first section defines relevant concepts in the context of HO and provides a summary of proposed causes of HO. The second section starts with a detailed analysis of the occurrence and involvement of calcification in HO. It is followed by an explanation of the causes of calcification and its consequences. This allows to speculate on the potential chemical modulators of inflammation and triggers of HO. The end of this second section is devoted to in vitro mineralization tests used to predict the ectopic potential of materials. The third section reviews the biological cascade of events occurring during pathological and material-induced HO, and attempts to propose a quantitative timeline of HO formation. The fourth section looks at potential ways to control HO formation, either acting on SLIHI or on inflammation. Chemical, physical, and drug-based approaches are considered. Finally, the evaluation finishes with a critical assessment of the definition of osteoinduction. STATEMENT OF SIGNIFICANCE: The ability to regenerate bone in a spatially controlled and reproducible manner is an essential prerequisite for the treatment of large bone defects. As such, understanding the mechanism leading to heterotopic ossification (HO), a condition triggered by an injury leading to the formation of mature lamellar bone in extraskeletal soft tissues, would be very useful. Unfortunately, the mechanism(s) behind HO is(are) poorly understood. The present study reviews the literature on HO and based on it, proposes that HO can be caused by a combination of inflammation and calcification. This mechanism helps to better understand current strategies to prevent and treat HO. It also shows new opportunities to improve the treatment of bone defects in orthopedic and dental procedures.
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7
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Atz Dick T, Uludağ H. A Polyplex in a Shell: The Effect of Poly(aspartic acid)-Mediated Calcium Carbonate Mineralization on Polyplexes Properties and Transfection Efficiency. Mol Pharm 2022; 19:2077-2091. [PMID: 35649175 DOI: 10.1021/acs.molpharmaceut.1c00909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mineralization by exposure of organic templates to supersaturated solutions is used by many living organisms to generate specialized materials to perform structural or protective functions. Similarly, it was suggested that improved robustness acquired through mineralization under natural conditions could be an important factor for virus survival outside of a host for better transfection of cells. Here, inspired by this fact, we developed a nonviral tricomponent polyplex system for gene delivery capable of undergoing mineralization. First, we fabricated anionic polyplexes carrying pDNA by self-assembly with a lipid-modified cationic polymer and coating by poly(aspartic acid). Then, we submitted the polyplexes to a two-step mineralization reaction to precipitate CaCO3 under various supersaturations. We carried out detailed morphological studies of the mineralized polyplexes and identified which parameters of the fabrication process were influential on transfection efficiency. We found that mineralization with CaCO3 is efficient in promoting transfection efficiency as long as a certain Ca2+/CO32- lower limit ratio is respected. However, calcium incubation can also be used to achieve similar effects at higher concentrations depending on polyplex composition, probably due to the formation of physical cross-links by calcium binding to poly(aspartic acid). We proposed that the improved robustness and transfection efficiency provided by means of mineralization can be used to expand the possible applications of polyplexes in gene therapy.
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Affiliation(s)
- Teo Atz Dick
- Department of Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, Alberta T5K 2Y3 Canada
| | - Hasan Uludağ
- Department of Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, Alberta T5K 2Y3 Canada.,Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta T6G 2R3 Canada.,Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta T6G 2R3, Canada
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8
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Amri A, Chevallier P, Guay-Bégin AA, Bilem I, Gauvin G, Alamdari H, Heim F, Laroche G. Polyethylene terephthalate textile heart valve: How poly(ethylene glycol) grafting limits fibrosis. J Biomed Mater Res B Appl Biomater 2022; 110:2110-2120. [PMID: 35420261 DOI: 10.1002/jbm.b.35065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 02/24/2022] [Accepted: 03/21/2022] [Indexed: 11/11/2022]
Abstract
Transcatheter aortic valve replacement (TAVR) is an alternative technique to surgical valve replacement for over 300,000 patients worldwide. The valve material used in the TAVR is made of biological tissues, whose durability remains unknown. The success of the TAVR favors the research toward synthetic valve leaflet materials as an alternative to biological tissues. In particular, polyethylene terephthalate (PET) textile valves have recently proven durability over a 6-month period in animal sheep models. Excessive fibrotic tissue formation remains, however, a critical issue to be addressed. The aim of this work was therefore to investigate the potential of PET textiles covalently conjugated with polyethylene glycol (PEG), known for its antifouling properties, to modulate the fibrosis formation both in vitro and in vivo. For this purpose, the surfaces of heart valves made of PET textiles were functionalized with an atmospheric pressure plasma, leading to the formation of carboxylic acid (COOH) groups, further used for PEG-NH2 conjugation. Surface modification efficiency was assessed by X-ray photoelectron spectroscopy and water contact angle measurements. The biological behavior of the as-modified surfaces was evaluated by in vitro assays, using rat cardiac fibroblast cells. The results show that PEG treated substrates restrained the fibroblasts adhesion and proliferation. The PEG treated valve, implanted in a juvenile sheep model, showed a significant fibrosis reduction. The explant also revealed calcification issues that need to be addressed.
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Affiliation(s)
- Amna Amri
- Laboratoire d'ingénierie de surface (LIS), Centre de Recherche du CHU de Québec-Université Laval, Hôpital Saint-François d'Assise, Québec City, Québec, Canada.,Département de génie des mines, de la métallurgie et des matériaux, Centre de recherche sur les Matériaux Avancés, Université Laval, Québec City, Québec, Canada.,Laboratoire de Physique et Mécanique Textiles, GEPROVAS, Mulhouse, France
| | - Pascale Chevallier
- Laboratoire d'ingénierie de surface (LIS), Centre de Recherche du CHU de Québec-Université Laval, Hôpital Saint-François d'Assise, Québec City, Québec, Canada.,Département de génie des mines, de la métallurgie et des matériaux, Centre de recherche sur les Matériaux Avancés, Université Laval, Québec City, Québec, Canada
| | - Andrée-Anne Guay-Bégin
- Laboratoire d'ingénierie de surface (LIS), Centre de Recherche du CHU de Québec-Université Laval, Hôpital Saint-François d'Assise, Québec City, Québec, Canada.,Département de génie des mines, de la métallurgie et des matériaux, Centre de recherche sur les Matériaux Avancés, Université Laval, Québec City, Québec, Canada
| | - Ibrahim Bilem
- Laboratoire d'ingénierie de surface (LIS), Centre de Recherche du CHU de Québec-Université Laval, Hôpital Saint-François d'Assise, Québec City, Québec, Canada.,Département de génie des mines, de la métallurgie et des matériaux, Centre de recherche sur les Matériaux Avancés, Université Laval, Québec City, Québec, Canada
| | - Guillaume Gauvin
- Département de génie des mines, de la métallurgie et des matériaux, Centre de recherche sur les Matériaux Avancés, Université Laval, Québec City, Québec, Canada
| | - Houshang Alamdari
- Département de génie des mines, de la métallurgie et des matériaux, Centre de recherche sur les Matériaux Avancés, Université Laval, Québec City, Québec, Canada
| | - Frédéric Heim
- Laboratoire de Physique et Mécanique Textiles, GEPROVAS, Mulhouse, France
| | - Gaétan Laroche
- Laboratoire d'ingénierie de surface (LIS), Centre de Recherche du CHU de Québec-Université Laval, Hôpital Saint-François d'Assise, Québec City, Québec, Canada.,Département de génie des mines, de la métallurgie et des matériaux, Centre de recherche sur les Matériaux Avancés, Université Laval, Québec City, Québec, Canada
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He J, Yang J, Li M, Li Y, Pang Y, Deng J, Zhang X, Liu W. Polyzwitterion Manipulates Remineralization and Antibiofilm Functions against Dental Demineralization. ACS NANO 2022; 16:3119-3134. [PMID: 35060713 DOI: 10.1021/acsnano.1c10812] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Biomineralization technology has become a trend for the arrest and prevention of dental caries. In particular, the bioactivity and ability to release large amounts of Ca2+ and PO43- ions make amorphous calcium phosphate (ACP) for hard tissue remineralization are highly desired. However, the instability of ACP limits its clinical application. Under continuous bacterial challenge in the oral cavity, the currently developed ACP-based remineralization system lacks the ability to inhibit bacterial adhesion and biofilm formation. Here, a dual-functional nanocomposite with antibiofilm and remineralization properties was designed by combining zwitterionic poly(carboxybetaine acrylamide) (PCBAA) and ACP. The resulting nanocomposite was stable in solution for at least 3 days without any aggregation. The PCBAA/ACP nanocomposite exerted a significant inhibitory effect on the adhesion and biofilm formation of Streptococcus mutans and exhibited bactericidal activities under acidic conditions resulting from bacteria. Moreover, compared with fluoride, this nanocomposite demonstrated superior effects in promoting the remineralization of demineralized enamel and the occlusion of exposed dentinal tubules in vivo and in vitro. The present work provides a theoretical and experimental basis for the use of the PCBAA/ACP nanocomposite as a potential dual-functional agent for arresting and preventing caries.
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Affiliation(s)
- Jiankang He
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin 300070, China
| | - Jianhai Yang
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350 China
| | - Min Li
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin 300070, China
| | - Yachong Li
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin 300070, China
| | - Yanyun Pang
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin 300070, China
| | - Jiayin Deng
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin 300070, China
| | - Xu Zhang
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin 300070, China
- Institute of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Wenguang Liu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350 China
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Saxena N, Mizels J, Cremer MA, Guarnizo V, Rodriguez DE, Gower LB. Comparison of Synthetic vs. Biogenic Polymeric Process-Directing Agents for Intrafibrillar Mineralization of Collagen. Polymers (Basel) 2022; 14:polym14040775. [PMID: 35215688 PMCID: PMC8879695 DOI: 10.3390/polym14040775] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/14/2022] [Accepted: 02/14/2022] [Indexed: 12/10/2022] Open
Abstract
With the aging population, there is a growing need for mineralized tissue restoration and synthetic bone substitutes. Previous studies have shown that a polymer-induced liquid-precursor (PILP) process can successfully mineralize collagen substrates to achieve compositions found in native bone and dentin. This process also leads to intrafibrillar apatitic crystals with their [001] axes aligned roughly parallel to the long axis of the collagen fibril, emulating the nanostructural organization found in native bone and dentin. When demineralized bovine bone was remineralized via the PILP process using osteopontin (OPN), the samples were able to activate mouse marrow-derived osteoclasts to similar levels to those of native bone, suggesting a means for fabricating bioactive bone substitutes that could trigger remodeling through the native bone multicellular unit (BMU). In order to determine if OPN derived from bovine milk could be a cost-effective process-directing agent, the mineralization of type I collagen scaffolds using this protein was compared to the benchmark polypeptide of polyaspartic acid (sodium salt; pAsp). In this set of experiments, we found that OPN led to much faster and more uniform mineralization when compared with pAsp, making it a cheaper and commercially attractive alternative for mineralized tissue restorations.
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Affiliation(s)
- Neha Saxena
- Department of Materials Science & Engineering, University of Florida, Gainesville, FL 32611, USA; (N.S.); (J.M.); (M.A.C.); (V.G.); (D.E.R.)
- Bio-Therapeutics Drug Product Development, Janssen Pharmaceuticals, Inc., Malvern, PA 19355, USA
| | - Joshua Mizels
- Department of Materials Science & Engineering, University of Florida, Gainesville, FL 32611, USA; (N.S.); (J.M.); (M.A.C.); (V.G.); (D.E.R.)
- Department of Orthopaedic Surgery, University of Utah, Salt Lake City, UT 84112, USA
| | - Maegan A. Cremer
- Department of Materials Science & Engineering, University of Florida, Gainesville, FL 32611, USA; (N.S.); (J.M.); (M.A.C.); (V.G.); (D.E.R.)
- College of Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Vanessa Guarnizo
- Department of Materials Science & Engineering, University of Florida, Gainesville, FL 32611, USA; (N.S.); (J.M.); (M.A.C.); (V.G.); (D.E.R.)
- Quality Engineering, Medtronic ENT, Jacksonville, FL 32611, USA
| | - Douglas E. Rodriguez
- Department of Materials Science & Engineering, University of Florida, Gainesville, FL 32611, USA; (N.S.); (J.M.); (M.A.C.); (V.G.); (D.E.R.)
- R&D, Novabone Products LLC, Alachua, FL 32611, USA
| | - Laurie B. Gower
- Department of Materials Science & Engineering, University of Florida, Gainesville, FL 32611, USA; (N.S.); (J.M.); (M.A.C.); (V.G.); (D.E.R.)
- Correspondence:
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11
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Putranto AW, Suprastiwi E, Meidyawati R, Agusnar H. Characterization of Novel Cement-Based Carboxymethyl Chitosan/Amorphous Calcium Phosphate. Eur J Dent 2022; 16:809-814. [PMID: 35016237 DOI: 10.1055/s-0041-1739449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
OBJECTIVE This study aimed to analyze, evaluate, and characterize novel cement-based carboxymethyl chitosan/amorphous calcium phosphate (CMC/ACP). MATERIALS AND METHODS The three cement groups studied were gypsum (Gyp), and CMC/ACP-gypsum cement-based 5% (5% CAG) and 10% (10% CAG). The groups were characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), setting time, and scanning electron microscopy (SEM) data. The characterization results were analyzed qualitatively, but the data for setting time were analyzed using SPSS (p < 0.05). STATISTICAL ANALYSIS Data were statistically analyzed. One-way analysis of variance was used to compare numerical (parametric) data between more than two separate groups followed by post hoc Tukey. RESULTS FTIR showed phosphate groups indicate the presence of calcium phosphate in the form of amorphous (ACP) in the CMC/ACP, CMC/ACP post-milled powder, and CMC/ACP cement-based (5% CAG and 10% CAG). XRD showed no difference in the diffraction spectra among the Gyp, 5% CAG, and 10% CAG groups. SEM images revealed that the CMC/ACP cement-based groups (5% CAG and 10% CAG) showed CMC/ACP cluster filled with hollow spaces between the gypsum crystals and aggregations surrounding the gypsum crystals. The CMC/ACP showed envelopes and attached to the crystalline structures of the gypsum. Setting times of 5% CAG and 10% CAG showed significant differences compared with Gyp (p < 0.05). CONCLUSION The result of our study showed that CMC/ACP cement-based (5% CAG and 10% CAG) demonstrated amorphous characteristic, which can stabilize calcium ions and phosphate group (ACP). In addition, the modification of gypsum using CMC/ACP as cement-based extended the time of setting.
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Affiliation(s)
- Aditya Wisnu Putranto
- Department of Conservative Dentistry, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia
| | - Endang Suprastiwi
- Department of Conservative Dentistry, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia
| | - Ratna Meidyawati
- Department of Conservative Dentistry, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia
| | - Harry Agusnar
- Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Sumatera Utara, Medan, Indonesia
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Shao C, Zhang Z, Jin W, Zhang Z, Jin B, Jiang S, Pan H, Tang R, De Yoreo JJ, Liu XY. Oriented Crystallization of Hydroxyapatite in Self-Assembled Peptide Fibrils as a Bonelike Material. ACS Biomater Sci Eng 2021; 9:1808-1814. [PMID: 34855358 DOI: 10.1021/acsbiomaterials.1c00713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Controlling oriented crystallization is key to producing bonelike composite materials with a well-organized structure. However, producing this type of composite material using synthetic biopolymers as scaffolds is challenging. Inspired by the molecular structure of collagen-I, a collagenlike peptide─(Pro-Hyp-Gly)10 (POG10)─was designed to produce self-assembled fibrils that resemble the structure of collagen-I fibrils. In addition, the oriented mineralization of HAP crystals is formed in the fibrils that reproduces a bonelike material similar to collagen-I fibril mineralization. Unlike collagen-I fibrils, POG10 fibrils do not contain gap spaces. The molecular simulation results indicate that in addition to space confinement, the molecular field generated by POG10 can also confine the orientation of HAP, enriching our understanding of physical confinement and shedding light on the design of synthetic biopolymer scaffolds for bonelike material fabrication.
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Affiliation(s)
- Changyu Shao
- Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310027, China.,Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zhisen Zhang
- College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Wenjing Jin
- Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310006, China
| | - Zhan Zhang
- Department of Orthopedics, Tongde Hospital of Zhejiang Province, Hangzhou 310012, China
| | - Biao Jin
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Shuqin Jiang
- Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310027, China
| | - Haihua Pan
- Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310027, China
| | - Ruikang Tang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - James J De Yoreo
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xiang Yang Liu
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
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A Dick T, Uludağ H. Mineralized polyplexes for gene delivery: Improvement of transfection efficiency as a consequence of calcium incubation and not mineralization. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 129:112419. [PMID: 34579928 DOI: 10.1016/j.msec.2021.112419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/19/2021] [Accepted: 09/01/2021] [Indexed: 12/18/2022]
Abstract
Gene therapy is an emerging field in which nucleic acids are used to control protein expression. The necessity of delivering nucleic acids to specific cell types and intracellular sites demands the use of highly specialized gene carriers. As a carrier modification technique, mineralization has been successfully used to modify viral and non-viral carriers, providing new properties that ultimately aim to increase the transfection efficiency. However, for the specific case of polyplexes used in gene therapy, recent literature shows that interaction with calcium, a fundamental step of mineralization, might be effective to increase transfection efficiency, leaving an ambiguity about of the role of mineralization for this type of gene carriers. To answer this question and to reveal the properties responsible for increasing transfection efficiency, we mineralized poly(aspartic acid) coated polyplexes at various CaCl2 and Na3PO4 concentrations, and evaluated the resultant carriers for physicochemical and morphological characteristics, as well as transfection and delivery efficiency with MC3T3-E1 mouse osteoblastic cells. We found that both mineralization and calcium incubation positively affected the transfection efficiency and uptake of polyplexes in MC3T3-E1 cells. However, this effect originated from the properties achieved by polyplexes after the calcium incubation step that are maintained after mineralization, including particle size increase, improved pDNA binding, and adjustment of zeta potential. Considering that mineralization can be a longer process than calcium incubation, we find that calcium incubation might be sufficient and preferred if improved transfection efficiency in vitro is the only effect desired.
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Affiliation(s)
- Teo A Dick
- Department of Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB, Canada.
| | - Hasan Uludağ
- Department of Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB, Canada; Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada; Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.
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14
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Lemke T, Edte M, Gebauer D, Peter C. Three Reasons Why Aspartic Acid and Glutamic Acid Sequences Have a Surprisingly Different Influence on Mineralization. J Phys Chem B 2021; 125:10335-10343. [PMID: 34473925 DOI: 10.1021/acs.jpcb.1c04467] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Understanding the role of polymers rich in aspartic acid (Asp) and glutamic acid (Glu) is the key to gaining precise control over mineralization processes. Despite their chemical similarity, experiments revealed a surprisingly different influence of Asp and Glu sequences. We conducted molecular dynamics simulations of Asp and Glu peptides in the presence of calcium and chloride ions to elucidate the underlying phenomena. In line with experimental differences, in our simulations, we indeed find strong differences in the way the peptides interact with ions in solution. The investigated Asp pentapeptide tends to pull a lot of ions into its vicinity, and many structures with clusters of calcium and chloride ions on the surface of the peptide can be observed. Under the same conditions, comparatively fewer ions can be found in proximity of the investigated Glu pentapeptide, and the structures are characterized by single calcium ions bound to multiple carboxylate groups. Based on our simulation data, we identified three reasons contributing to these differences, leading to a new level of understanding additive-ion interactions.
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Affiliation(s)
- Tobias Lemke
- Theoretical Chemistry, University of Konstanz, 78547 Konstanz, Germany
| | - Moritz Edte
- Theoretical Chemistry, University of Konstanz, 78547 Konstanz, Germany
| | - Denis Gebauer
- Institute of Inorganic Chemistry, Leibniz University Hannover, 30167 Hannover, Germany
| | - Christine Peter
- Theoretical Chemistry, University of Konstanz, 78547 Konstanz, Germany
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15
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Slimen JB, Hidouri M, Ghouma M, Salem EB, Dorozhkin SV. Sintering of Potassium Doped Hydroxy-Fluorapatite Bioceramics. COATINGS 2021; 11:858. [DOI: 10.3390/coatings11070858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
The present study describes the influence of potassium and hydroxyl substitutions on the structural, thermal and mechanical properties of fluorapatite bioceramics. A set of non-stoichiometric ion-substituted compounds, with a chemical formula of Ca10−xKx(PO4)6F(2−2x)(OH)x with 0 ≤ x ≤ 1 synthesized by the wet precipitation method, were found to be single-phase apatites crystallizing in the hexagonal P63/m space group. The structural parameters, as well as the crystallite sizes, increased accordingly to the amount of added dopant-ions. The thermal behavior of these compounds, studied within the temperature range 500–1200 °C, indicated a partial decomposition of the apatitic phase and its transformation to tricalcium phosphate β-Ca3(PO4)2 at temperatures exceeding 750 °C. A relative density of the sintered samples achieved the highest value with x = 0.25 and reached about 95% after sintering at 1050 °C for 1 h. The microstructures of the sintered samples were of a trans-granular aspect and experienced an increase in the radius of their pores as x increased. The prepared bioceramic materials were mechanically characterized by means of Young’s modulus, flexural strength and fracture toughness measurements. The overall trend of these parameters evolved comparably to the relative density, and the maximum values obtained for x = 0.25 were measured to be 96 MPa, 47 MPa and 1.14 MPa·m1/2, respectively.
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Gelli R, Tonelli M, Ridi F, Bonini M, Kwaambwa HM, Rennie AR, Baglioni P. Modifying the crystallization of amorphous magnesium-calcium phosphate nanoparticles with proteins from Moringa oleifera seeds. J Colloid Interface Sci 2021; 589:367-377. [DOI: 10.1016/j.jcis.2021.01.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/03/2021] [Accepted: 01/04/2021] [Indexed: 01/10/2023]
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17
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Chen S, Wang Q, Eltit F, Guo Y, Cox M, Wang R. An Ammonia-Induced Calcium Phosphate Nanostructure: A Potential Assay for Studying Osteoporosis and Bone Metastasis. ACS APPLIED MATERIALS & INTERFACES 2021; 13:17207-17219. [PMID: 33845570 DOI: 10.1021/acsami.1c00495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Osteoclastic resorption of bones plays a central role in both osteoporosis and bone metastasis. A reliable in vitro assay that simulates osteoclastic resorption in vivo would significantly speed up the process of developing effective therapeutic solutions for those diseases. Here, we reported the development of a novel and robust nanostructured calcium phosphate coating with unique functions on the track-etched porous membrane by using an ammonia-induced mineralization (AiM) technique. The calcium phosphate coating uniformly covers one side of the PET membrane, enabling testing for osteoclastic resorption. The track-etched pores in the PET membrane allow calcium phosphate mineral pins to grow inside, which, on the one hand, enhances coating integration with a membrane substrate and, on the other hand, provides diffusion channels for delivering drugs from the lower chamber of a double-chamber cell culture system. The applications of the processed calcium phosphate coating were first demonstrated as a drug screening device by using alendronate, a widely used drug for osteoporosis. It was confirmed that the delivery of alendronate significantly decreased both the number of monocyte-differentiated osteoclasts and coating resorption. To demonstrate the application in studying bone metastasis, we delivered a PC3 prostate cancer-conditioned medium and confirmed that both the differentiation of monocytes into osteoclasts and the osteoclastic resorption of the calcium phosphate coating were significantly enhanced. This novel assay thus provides a new platform for studying osteoclastic activities and assessing drug efficacy in vitro.
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Affiliation(s)
- Sijia Chen
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Qiong Wang
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Felipe Eltit
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Yubin Guo
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Michael Cox
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Rizhi Wang
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
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18
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Du T, Niu X, Hou S, Xu M, Li Z, Li P, Fan Y. Highly aligned hierarchical intrafibrillar mineralization of collagen induced by periodic fluid shear stress. J Mater Chem B 2021; 8:2562-2572. [PMID: 32101230 DOI: 10.1039/c9tb02643f] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Periodic fluid shear stress (FSS) is one of the main mechanical microenvironments in mineralization of bone matrix. To elucidate the mechanism of periodic FSS in collagen mineralization, a mechanical loading induced mineralization system is developed and compared with traditional polyacrylic acid (PAA) induced mineralization. Fourier transform infrared (FTIR) spectroscopy, calcium-to-phosphorus molar ratio and transmission electron microscopy (TEM) demonstrate that both periodic FSS and PAA can control the size of amorphous calcium phosphate (ACP) to avoid aggregation and help the formation of intrafibrillar mineralization. Differently, periodic FSS under a proper cycle and range can accelerate the conversion of ACP to apatite crystals and alleviate the reduced transformation caused by PAA. Under the action of template analogues, periodic FSS can also promote the formation of highly oriented hierarchical intrafibrillar mineralized (HIM) collagen. These findings are helpful for understanding the mechanism of collagen mineralization in natural bone matrix and contribute to the design of novel bone substitute materials with hierarchical structures.
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Affiliation(s)
- Tianming Du
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Xufeng Niu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China. and Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China and Research Institute of Beihang University in Shenzhen, Shenzhen 518057, China
| | - Sen Hou
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China. and Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China
| | - Menghan Xu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Zhengwei Li
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Ping Li
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China. and Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China. and Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China and Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing 100176, China
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19
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Song J, Li T, Gao J, Li C, Jiang S, Zhang X. Building an aprismatic enamel-like layer on a demineralized enamel surface by using carboxymethyl chitosan and lysozyme-encapsulated amorphous calcium phosphate nanogels. J Dent 2021; 107:103599. [PMID: 33561513 DOI: 10.1016/j.jdent.2021.103599] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 02/01/2021] [Accepted: 02/04/2021] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES The purpose of this study was to prepare carboxymethyl chitosan (CMC) and lysozyme nanogels that could encapsulate amorphous calcium phosphate (ACP) for achieving its controlled delivery, thus forming an aprismatic enamel-like layer on the demineralized enamel surface. METHODS CMC/LYZ-ACP nanogels were developed, and the controlled delivery of ACP from the nanogels was induced by the presence of NaCl. The nanogel morphologies at various NaCl concentrations was measured by transmission electron microscopy (TEM). The particle sizes and zeta potentials (ζ-potential) of the samples were determined using a combined dynamic light scattering/particle electrophoresis instrument. Comparing the remineralization effect of the CMC/LYZ-ACP nanogels on the demineralized enamel surface with that of a fluoride treatment, the remineralization effect was examined by nanoindentation tests, X-ray diffraction (XRD), confocal laser scanning microscopy (CLSM), and scanning electron microscopy (SEM). RESULTS CMC/LYZ-ACP nanogels were negatively charged spherical structures with a particle size of approximately 300 nm. At high concentrations of NaCl (0.15 M), ACP was dissociated from the disassembled nanogels and transformed into hydroxyapatite (HAP). Groups treated with the CMC/LYZ-ACP nanogels showed the regeneration of an aprismatic enamel-like layer on an acid-etched enamel surface, which provided increased mechanical properties (P < 0.05) and a high impermeability (P < 0.01) compared to those of the fluoride-treated group. CONCLUSIONS This research provides a new idea for the stable and controllable delivery of ACP from CMC/LYZ-ACP nanogels, which can form an aprismatic enamel-like layer in situ on the surface of demineralized enamel. In regard to further clinical development, this material and method may be promising for treating early enamel caries.
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Affiliation(s)
- Jinhua Song
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Tiancheng Li
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Jian Gao
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Changyi Li
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China; Institute of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Shaoyun Jiang
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China; Department of Periodontology, Center of Stomatology, Shenzhen Hospital, Peking University, Shenzhen 518000, China.
| | - Xu Zhang
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China; Institute of Stomatology, Tianjin Medical University, Tianjin 300070, China.
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20
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Tovani CB, Oliveira TM, Soares MPR, Nassif N, Fukada SY, Ciancaglini P, Gloter A, Ramos AP. Strontium Calcium Phosphate Nanotubes as Bioinspired Building Blocks for Bone Regeneration. ACS APPLIED MATERIALS & INTERFACES 2020; 12:43422-43434. [PMID: 32876428 DOI: 10.1021/acsami.0c12434] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Calcium phosphate (CaP)-based ceramics are the most investigated materials for bone repairing and regeneration. However, the clinical performance of commercial ceramics is still far from that of the native tissue, which remains as the gold standard. Thus, reproducing the structural architecture and composition of bone matrix should trigger biomimetic response in synthetic materials. Here, we propose an innovative strategy based on the use of track-etched membranes as physical confinement to produce collagen-free strontium-substituted CaP nanotubes that tend to mimic the building block of bone, i.e., the mineralized collagen fibrils. A combination of high-resolution microscopic and spectroscopic techniques revealed the underlying mechanisms driving the nanotube formation. Under confinement, poorly crystalline apatite platelets assembled into tubes that resembled the mineralized collagen fibrils in terms of diameter and structure of bioapatite. Furthermore, the synergetic effect of Sr2+ and confinement gave rise to the stabilization of amorphous strontium CaP nanotubes. The nanotubes were tested in long-term culture of osteoblasts, supporting their maturation and mineralization without eliciting any cytotoxicity. Sr2+ released from the particles reduced the differentiation and activity of osteoclasts in a Sr2+ concentration-dependent manner. Their bioactivity was evaluated in a serum-like solution, showing that the particles spatially guided the biomimetic remineralization. Further, these effects were achieved at strikingly low concentrations of Sr2+ that is crucial to avoid side effects. Overall, these results open simple and promising pathways to develop a new generation of CaP multifunctional ceramics that are active in tissue regeneration and able to simultaneously induce biomimetic remineralization and control the imbalanced osteoclast activity responsible for bone density loss.
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Affiliation(s)
- Camila B Tovani
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
| | - Tamires M Oliveira
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
| | - Mariana P R Soares
- Departamento de Ciências Biomoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
| | - Nadine Nassif
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, F-75005 Paris, France
| | - Sandra Y Fukada
- Departamento de Ciências Biomoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
| | - Pietro Ciancaglini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
| | - Alexandre Gloter
- Laboratoire de Physique des Solides, Université Paris-Saclay, 91405 Orsay, France
| | - Ana P Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
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21
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Two-in-one strategy: a remineralizing and anti-adhesive coating against demineralized enamel. Int J Oral Sci 2020; 12:27. [PMID: 32994399 PMCID: PMC7524769 DOI: 10.1038/s41368-020-00097-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 02/05/2023] Open
Abstract
Tooth enamel is prone to be attacked by injurious factors, leading to a de/remineralization imbalance. To repair demineralized enamel and prevent pulp inflammation caused by biofilm accumulation, measures are needed to promote remineralization and inhibit bacterial adhesion on the tooth surface. An innovative material, poly (aspartic acid)-polyethylene glycol (PASP-PEG), was designed and synthesized to construct a mineralizing and anti-adhesive surface that could be applied to repair demineralized enamel. A cytotoxicity assay revealed the low cytotoxicity of synthesized PASP-PEG. Adsorption results demonstrated that PASP-PEG possesses a high binding affinity to the hydroxyapatite (HA)/tooth surface. In vitro experiments and scanning electron microscopy (SEM) demonstrated a strong capacity of PASP-PEG to induce in situ remineralization and direct the oriented growth of apatite nanocrystals. Energy dispersive X-ray spectroscopy (EDS), X-ray diffraction analysis (XRD) and Vickers hardness tests demonstrated that minerals induced by PASP-PEG were consistent with healthy enamel in Ca/P ratio, crystal form and surface micro-hardness. Contact angle tests and bacterial adhesion experiments demonstrated that PASP-PEG yielded a strong anti-adhesive effect. In summary, PASP-PEG could achieve dual effects for enamel repair and anti-adhesion of bacteria, thereby widening its application in enamel repair.
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Meldrum FC, O'Shaughnessy C. Crystallization in Confinement. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001068. [PMID: 32583495 DOI: 10.1002/adma.202001068] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/26/2020] [Accepted: 03/27/2020] [Indexed: 05/23/2023]
Abstract
Many crystallization processes of great importance, including frost heave, biomineralization, the synthesis of nanomaterials, and scale formation, occur in small volumes rather than bulk solution. Here, the influence of confinement on crystallization processes is described, drawing together information from fields as diverse as bioinspired mineralization, templating, pharmaceuticals, colloidal crystallization, and geochemistry. Experiments are principally conducted within confining systems that offer well-defined environments, varying from droplets in microfluidic devices, to cylindrical pores in filtration membranes, to nanoporous glasses and carbon nanotubes. Dramatic effects are observed, including a stabilization of metastable polymorphs, a depression of freezing points, and the formation of crystals with preferred orientations, modified morphologies, and even structures not seen in bulk. Confinement is also shown to influence crystallization processes over length scales ranging from the atomic to hundreds of micrometers, and to originate from a wide range of mechanisms. The development of an enhanced understanding of the influence of confinement on crystal nucleation and growth will not only provide superior insight into crystallization processes in many real-world environments, but will also enable this phenomenon to be used to control crystallization in applications including nanomaterial synthesis, heavy metal remediation, and the prevention of weathering.
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Affiliation(s)
- Fiona C Meldrum
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
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23
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The role of aspartic acid in reducing coral calcification under ocean acidification conditions. Sci Rep 2020; 10:12797. [PMID: 32733044 PMCID: PMC7393068 DOI: 10.1038/s41598-020-69556-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/17/2020] [Indexed: 11/13/2022] Open
Abstract
Biomolecules play key roles in regulating the precipitation of CaCO3 biominerals but their response to ocean acidification is poorly understood. We analysed the skeletal intracrystalline amino acids of massive, tropical Porites spp. corals cultured over different seawater pCO2. We find that concentrations of total amino acids, aspartic acid/asparagine (Asx), glutamic acid/glutamine and alanine are positively correlated with seawater pCO2 and inversely correlated with seawater pH. Almost all variance in calcification rates between corals can be explained by changes in the skeletal total amino acid, Asx, serine and alanine concentrations combined with the calcification media pH (a likely indicator of the dissolved inorganic carbon available to support calcification). We show that aspartic acid inhibits aragonite precipitation from seawater in vitro, at the pH, saturation state and approximate aspartic acid concentrations inferred to occur at the coral calcification site. Reducing seawater saturation state and increasing [aspartic acid], as occurs in some corals at high pCO2, both serve to increase the degree of inhibition, indicating that biomolecules may contribute to reduced coral calcification rates under ocean acidification.
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24
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Ustriyana P, Michel FM, Wilson MC, Harmon E, Chen J, Liu T, Sahai N. Oligo(l-glutamic acids) in Calcium Phosphate Precipitation: Mechanism of Delayed Phase Transformation. J Phys Chem B 2020; 124:6288-6298. [PMID: 32600044 DOI: 10.1021/acs.jpcb.0c01690] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Proteins and their mimics that contain negatively charged sequences are important in natural and biomimetic mineralization. The mechanism by which these sequences affect calcium phosphate mineralization is not well understood. Here, peptides containing different numbers of repeat units of contiguous glutamic acid residues, oligo(l-glutamic acid)n (n = 3, 7, 8, 10), were investigated with regards to the mechanism in delaying the crystallization of amorphous calcium phosphate (ACP) while holding the amount of carboxylic acid groups in solution constant. Increasing peptide chain length increases the stability of ACP at a certain total amount of carboxylic acid groups in solution. This effect is shown to be due to stronger binding as well as binding to more calcium ions per peptide by the longer oligopeptides compared to the shorter ones. It is proposed that these associations delay the structural rearrangement of calcium ions and the dehydration of ACP, which are required for the crystallization of hydroxyapatite. The initial nucleation and the local structure of ACP, however, do not vary with chain length. This second part of a two-part series provides an improved mechanistic understanding of how organic additives, especially those with contiguous acidic amino acid sequences, modulate the kinetics of calcium phosphate precipitation and phase transformation.
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Affiliation(s)
- Putu Ustriyana
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - F Marc Michel
- Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Michael C Wilson
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Emma Harmon
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Jiahui Chen
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Tianbo Liu
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Nita Sahai
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States.,Department of Geosciences, The University of Akron, Akron, Ohio 44325, United States.,Integrated Bioscience Program, The University of Akron, Akron, Ohio 44325, United States
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Tolmachev D, Lukasheva N, Mamistvalov G, Karttunen M. Influence of Calcium Binding on Conformations and Motions of Anionic Polyamino Acids. Effect of Side Chain Length. Polymers (Basel) 2020; 12:E1279. [PMID: 32503199 PMCID: PMC7362111 DOI: 10.3390/polym12061279] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 05/29/2020] [Accepted: 05/31/2020] [Indexed: 11/21/2022] Open
Abstract
Investigation of the effect of CaCl2 salt on conformations of two anionic poly(amino acids) with different side chain lengths, poly-(α-l glutamic acid) (PGA) and poly-(α-l aspartic acid) (PASA), was performed by atomistic molecular dynamics (MD) simulations. The simulations were performed using both unbiased MD and the Hamiltonian replica exchange (HRE) method. The results show that at low CaCl2 concentration adsorption of Ca2+ ions lead to a significant chain size reduction for both PGA and PASA. With the increase in concentration, the chains sizes partially recover due to electrostatic repulsion between the adsorbed Ca2+ ions. Here, the side chain length becomes important. Due to the longer side chain and its ability to distance the charged groups with adsorbed ions from both each other and the backbone, PGA remains longer in the collapsed state as the CaCl2 concentration is increased. The analysis of the distribution of the mineral ions suggests that both poly(amino acids) should induce the formation of mineral with the same structure of the crystal cell.
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Affiliation(s)
- Dmitry Tolmachev
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 St. Petersburg, Russia;
| | - Natalia Lukasheva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 St. Petersburg, Russia;
| | - George Mamistvalov
- Faculty of Physics, St. Petersburg State University, Petrodvorets, 198504 St. Petersburg, Russia;
| | - Mikko Karttunen
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 St. Petersburg, Russia;
- Department of Chemistry, the University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
- Department of Applied Mathematics, the University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
- The Centre of Advanced Materials and Biomaterials Research, the University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
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Colaço E, Lefèvre D, Maisonhaute E, Brouri D, Guibert C, Dupont-Gillain C, El Kirat K, Demoustier-Champagne S, Landoulsi J. Enzyme-assisted mineralization of calcium phosphate: exploring confinement for the design of highly crystalline nano-objects. NANOSCALE 2020; 12:10051-10064. [PMID: 32347883 DOI: 10.1039/d0nr01638a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In hard tissues of vertebrates, calcium phosphate (CaP) biomineralization is a fascinating process that combines specific physicochemical and biochemical reactions, resulting in the formation of extracellular matrices with elegant nanoarchitectures. Although several "biomimetic" strategies have been developed for the design of mineralized nanostructured biointerfaces, the control of the crystallization process remains complex. Herein, we report an innovative approach to overcome this challenge by generating, in situ, CaP precursors in a confined medium. For this purpose, we explore a combination of (i) the layer-by-layer assembly, (ii) the template-based method and (iii) the heterogeneous enzymatic catalysis. We show the possibility of embedding active alkaline phosphatase in a nanostructured multilayered film and inducing the nucleation and growth of CaP compounds under different conditions. Importantly, we demonstrate that the modulation of the crystal phase from spheroid-shaped amorphous CaP to crystalline platelet-shaped hydroxyapatite depends on the degree of confinement of active enzymes. This leads to the synthesis of highly anisotropic mineralized nanostructures that are mechanically stable and with controlled dimensions, composition and crystal phase. The present study provides a straightforward, yet powerful, way to design anisotropic nanostructured materials, including a self-supported framework, which may be used in broad biomedical applications.
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Affiliation(s)
- E Colaço
- Laboratoire de Biomécanique & Bioingénierie, CNRS, Université de Technologie de Compiègne, BP 20529, F-60205 Compiègne Cedex, France
| | - D Lefèvre
- Institute of Condensed Matter and Nanosciences, Bio & Soft Matter, Université catholique de Louvain, Croix du Sud 1 (L7.04.02), 1348, Louvain-la-Neuve, Belgium.
| | - E Maisonhaute
- Sorbonne Université, CNRS, Laboratoire Interfaces et Systèmes Electrochimiques, LISE, F-75005 Paris, France
| | - D Brouri
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS, F-75005 Paris, France.
| | - C Guibert
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS, F-75005 Paris, France.
| | - C Dupont-Gillain
- Institute of Condensed Matter and Nanosciences, Bio & Soft Matter, Université catholique de Louvain, Croix du Sud 1 (L7.04.02), 1348, Louvain-la-Neuve, Belgium.
| | - K El Kirat
- Laboratoire de Biomécanique & Bioingénierie, CNRS, Université de Technologie de Compiègne, BP 20529, F-60205 Compiègne Cedex, France
| | - S Demoustier-Champagne
- Institute of Condensed Matter and Nanosciences, Bio & Soft Matter, Université catholique de Louvain, Croix du Sud 1 (L7.04.02), 1348, Louvain-la-Neuve, Belgium.
| | - J Landoulsi
- Laboratoire de Biomécanique & Bioingénierie, CNRS, Université de Technologie de Compiègne, BP 20529, F-60205 Compiègne Cedex, France and Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS, F-75005 Paris, France.
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27
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Colaço E, Brouri D, Méthivier C, Valentin L, Oudet F, El Kirat K, Guibert C, Landoulsi J. Calcium phosphate mineralization through homogenous enzymatic catalysis: Investigation of the early stages. J Colloid Interface Sci 2019; 565:43-54. [PMID: 31931298 DOI: 10.1016/j.jcis.2019.12.097] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/20/2019] [Accepted: 12/21/2019] [Indexed: 01/02/2023]
Abstract
HYPOTHESIS The crystallization of calcium phosphate (CaP) is a ubiquitous process that occurs in several mineralized tissues and involves a variety of biochemical and chemical reactions. This issue has been hitherto continuously studied from supersaturated solutions (chemical procedure), i.e. by adding calcium and orthophosphate ions in a homogenous phase. Yet, both in vivo and in vitro investigations have clearly shown the implication of enzymes, namely alkaline phosphatase (ALP), to initiate the mineralization process by generating orthophosphate ions. EXPERIMENTS We report a thorough investigation on the mechanism of enzyme-induced mineralization in homogenous phase (enzymatic procedure). For this purpose, ALP is introduced in Ca2+/Mg2+-containing solution (pH = 7.4; 37 °C), and its activity modulated by the concentration of its substrate. FINDINGS Results show that after 24 h of mineralization both chemical and enzymatic procedures lead to the formation of well-crystalline hydroxyapatite nano-objects, however with noticeable impact on their shape and dimensions. Remarkably enough, by combining in situ monitoring and ex situ characterizations, we identify several intermediate phases, including amorphous phase, dicalcium phosphate dehydrate phase (DCPD or brushite) and Whitlockite (WH). Besides, mineralized nano-objects with a core-shell structure is observed, and hydroxyapatite platelets are shown to grow on the surface of their shell.
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Affiliation(s)
- E Colaço
- Laboratoire de Biomécanique & Bioingénierie, CNRS, Université de Technologie de Compiègne, BP 20529, F-60205 Compiègne Cedex, France
| | - D Brouri
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - C Méthivier
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - L Valentin
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - F Oudet
- Service d'analyse physico-chimique, Université de Technologie de Compiègne, BP 20529, F-60205 Compiègne Cedex, France
| | - K El Kirat
- Laboratoire de Biomécanique & Bioingénierie, CNRS, Université de Technologie de Compiègne, BP 20529, F-60205 Compiègne Cedex, France
| | - C Guibert
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - J Landoulsi
- Laboratoire de Biomécanique & Bioingénierie, CNRS, Université de Technologie de Compiègne, BP 20529, F-60205 Compiègne Cedex, France; Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, F-75005 Paris, France.
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28
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Farzadi A, Renner T, Calomeni EP, Presley KF, Karn N, Lannutti J, Dasi LP, Agarwal G. Modulation of biomimetic mineralization of collagen by soluble ectodomain of discoidin domain receptor 2. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 104:109905. [PMID: 31499975 PMCID: PMC6741439 DOI: 10.1016/j.msec.2019.109905] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 05/31/2019] [Accepted: 06/17/2019] [Indexed: 02/08/2023]
Abstract
Collagen fibrils serve as the major template for mineral deposits in both biologically derived and engineered tissues. In recent years certain non-collagenous proteins have been elucidated as important players in differentially modulating intra vs. extra-fibrillar mineralization of collagen. We and others have previously shown that the expression of the collagen receptor, discoidin domain receptor 2 (DDR2) positively correlates with matrix mineralization. The objective of this study was to examine if the ectodomain (ECD) of DDR2 modulates intra versus extra-fibrillar mineralization of collagen independent of cell-signaling. For this purpose, a decellularized collagenous substrate, namely glutaraldehyde fixed porcine pericardium (GFPP) was subjected to biomimetic mineralization protocols. GFPP was incubated in modified simulated body fluid (mSBF) or polymer-induced liquid precursor (PILP) solutions in the presence of recombinant DDR2 ECD (DDR2-Fc) to mediate extra or intra-fibrillar mineralization of collagen. Thermogravimetric analysis revealed that DDR2-Fc increased mineral content in GFPP calcified in mSBF while no significant differences were observed in PILP mediated mineralization. Electron microscopy approaches were used to evaluate the quality and quantity mineral deposits. An increase in the matrix to mineral ratio, frequency of particles and size of mineral deposits was observed in the presence of DDR2-Fc in mSBF. Von Kossa staining and immunohistochemistry analysis of adjacent sections indicated that DDR2-Fc bound to both the matrix and mineral phase of GFPP. Further, DDR2-Fc was found to bind to hydroxyapatite (HAP) particles and enhance the nucleation of mineral deposits in mSBF solutions independent of collagen. Taken together, our results elucidate DDR2 ECD as a novel player in the modulation of extra-fibrillar mineralization of collagen.
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Affiliation(s)
- Arghavan Farzadi
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Theodore Renner
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Edward P Calomeni
- Renal Pathology, Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - Kayla F Presley
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA
| | - Nicole Karn
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
| | - John Lannutti
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA
| | - Lakshmi P Dasi
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Gunjan Agarwal
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA.
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29
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Gelli R, Ridi F, Baglioni P. The importance of being amorphous: calcium and magnesium phosphates in the human body. Adv Colloid Interface Sci 2019; 269:219-235. [PMID: 31096075 DOI: 10.1016/j.cis.2019.04.011] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/24/2019] [Accepted: 04/25/2019] [Indexed: 11/25/2022]
Abstract
This article focuses on the relevance of amorphous calcium (and magnesium) phosphates in living organisms. Although crystalline calcium phosphate (CaP)-based materials are known to constitute the major inorganic constituents of human hard tissues, amorphous CaP-based structures, often in combination with magnesium, are frequently employed by Nature to build up components of our body and guarantee their proper functioning. After a brief description of amorphous calcium phosphate (ACP) formation mechanism and structure, this paper is focused on the stabilization strategies that can be used to enhance the lifetime of the poorly stable amorphous phase. The various locations of our body in which ACP (pure or in combination with Mg2+) can be found (i.e. bone, enamel, small intestine, calciprotein particles and casein micelles) are highlighted, showing how the amorphous nature of ACP is often of paramount importance for the achievement of a specific physiological function. The last section is devoted to ACP-based biomaterials, focusing on how these materials differ from their crystalline counterparts in terms of biological response.
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30
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Du T, Niu X, Hou S, Li Z, Li P, Fan Y. Apatite minerals derived from collagen phosphorylation modification induce the hierarchical intrafibrillar mineralization of collagen fibers. J Biomed Mater Res A 2019; 107:2403-2413. [PMID: 31222920 DOI: 10.1002/jbm.a.36747] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 05/29/2019] [Accepted: 06/03/2019] [Indexed: 12/26/2022]
Abstract
Collagen is the critical organic component of bone matrix, which is the template for bone biomineralization. Phosphorylation modification of collagen plays an important role in the process of biomineralization in vivo, but its mechanism on in vitro biomimetic mineralization of bone matrix remains unclear at the molecular level. Sodium tripolyphosphate is used to phosphorylate collagen in this study and new phosphate groups appear on collagen fibrils after phosphorylation modification. The chelating amount of calcium is improved linearly with increasing the phosphorylation degree of collagen fibrils, which demonstrates that the introduced phosphate groups serve as new nucleation sites and participate in the formation of apatite minerals inside the collagen fibers. Stabilized nanosized amorphous calcium phosphate by polyacrylic acid can also permeate into collagen fibers and further transform into another layer of hydroxyapatite minerals. Both layers of apatite minerals eventually induce the formation of hierarchical intrafibrillar mineralization structure within the phosphorylated collagen fibers. The present research enriches the previous biomineralization mechanism of bone matrix, provides a facile strategy for biomimetic mineralization of collagen, and offers the basis for future investigation of the advanced bone substitute materials.
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Affiliation(s)
- Tianming Du
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Xufeng Niu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, China.,Research Institute of Beihang University in Shenzhen, Shenzhen, China
| | - Sen Hou
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, China
| | - Zhengwei Li
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Ping Li
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, China
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, China.,Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, China
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31
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Wu Y, Chen D, Kong L, Tsang DCW, Su M. Rapid and effective removal of uranium (VI) from aqueous solution by facile synthesized hierarchical hollow hydroxyapatite microspheres. JOURNAL OF HAZARDOUS MATERIALS 2019; 371:397-405. [PMID: 30870644 DOI: 10.1016/j.jhazmat.2019.02.110] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 02/27/2019] [Accepted: 02/28/2019] [Indexed: 06/09/2023]
Abstract
Rapidly increasing development of nuclear power stimulates the exploration of low-cost and highly efficient materials to selectively remove uranium (VI) from contaminated wastewater streams. Herein, we successfully developed a novel hydroxyapatite (HAP) adsorbent by using a facile and template-free hydrothermal method. The XRD results demonstrated that the HAP was crystallized in hexagonal structure (space group P63/m(176)), and the images of SEM and TEM indicated that the HAP possessed hollow and hierarchical nanostructure. A large BET specific surface area (182.6 m2/g) and average pore size of 10.5 nm, suggested that the hierarchical hollow HAP microspheres could provide sufficient active sites for highly efficient removal of uranium from aqueous solutions, indicated the HAP might be a prompt emergency material for the remediation of nuclear leakage accident. Freundlich isotherm and pseudo-second-order kinetics model fitted well to sorption experimental data. The study was further advanced by FT-IR and XPS. The sorption mechanism was mainly attributed to surface chemisorption between U(VI) and HAP, forming a new U-containing compound, viz., autunite (Ca(UO2)2(PO4)2·3H2O).
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Affiliation(s)
- Yanhong Wu
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.
| | - Lingjun Kong
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
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32
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Yavvari PS, Awasthi AK, Sharma A, Bajaj A, Srivastava A. Emerging biomedical applications of polyaspartic acid-derived biodegradable polyelectrolytes and polyelectrolyte complexes. J Mater Chem B 2019; 7:2102-2122. [DOI: 10.1039/c8tb02962h] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A summary of positive biomedical attributes of biodegradable polyelectrolytes (PELs) prepared from aspartic acid is provided. The utility of these PELs in emerging applications such as biomineralization modulators, antimycobacterials, biocompatible cell encapsulants and tissue adhesives is highlighted.
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Affiliation(s)
- Prabhu Srinivas Yavvari
- Department of Chemistry
- Indian Institute of Science Education and Research
- Bhauri
- Bhopal-462066
- India
| | - Anand Kumar Awasthi
- Department of Chemistry
- Indian Institute of Science Education and Research
- Bhauri
- Bhopal-462066
- India
| | - Aashish Sharma
- Department of Chemistry
- Indian Institute of Science Education and Research
- Bhauri
- Bhopal-462066
- India
| | - Avinash Bajaj
- Laboratory of Nanotechnology and Chemical Biology
- Regional Centre for Biotechnology
- NCR Biotech Science Cluster
- Faridabad-121001
- India
| | - Aasheesh Srivastava
- Department of Chemistry
- Indian Institute of Science Education and Research
- Bhauri
- Bhopal-462066
- India
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33
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Abstract
The mechanism (s) that drive the organization of bone mineral throughout the bone extracellular matrix remain unclear. The long-standing theory implicates the organic matrix, namely specific non-collagenous proteins and/or collagen fibrils, while a recent theory proposes a self-assembly mechanism. Applying a combination of spectroscopic and microscopic techniques in wet and dry conditions to bone-like hydroxyapatite nanoparticles that were used as a proxy for bone mineral, we confirm that mature bone mineral particles have the capacity to self-assemble into organized structures. A large quantity of water is present at the surface of bone mineral due to the presence of a hydrophilic, amorphous surface layer that coats bone mineral nanoparticles. These water molecules must not only be strongly bound to the surface of bone mineral in the form of a rigid hydration shell, but they must also be trapped within the amorphous surface layer. Cohesive forces between these water molecules present at the mineral–mineral interface not only hold the mature bone mineral particles together, but also promote their oriented stacking. This intrinsic ability of mature bone mineral particles to organize themselves without recourse to the organic matrix forms the foundation for the development of the next generation of orthopedic biomaterials.
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34
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Confinement generates single-crystal aragonite rods at room temperature. Proc Natl Acad Sci U S A 2018; 115:7670-7675. [PMID: 29967143 DOI: 10.1073/pnas.1718926115] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The topic of calcite and aragonite polymorphism attracts enormous interest from fields including biomineralization and paleogeochemistry. While aragonite is only slightly less thermodynamically stable than calcite under ambient conditions, it typically only forms as a minor product in additive-free solutions at room temperature. However, aragonite is an abundant biomineral, and certain organisms can selectively generate calcite and aragonite. This fascinating behavior has been the focus of decades of research, where this has been driven by a search for specific organic macromolecules that can generate these polymorphs. However, despite these efforts, we still have a poor understanding of how organisms achieve such selectivity. In this work, we consider an alternative possibility and explore whether the confined volumes in which all biomineralization occurs could also influence polymorph. Calcium carbonate was precipitated within the cylindrical pores of track-etched membranes, where these enabled us to systematically investigate the relationship between the membrane pore diameter and polymorph formation. Aragonite was obtained in increasing quantities as the pore size was reduced, such that oriented single crystals of aragonite were the sole product from additive-free solutions in 25-nm pores and significant quantities of aragonite formed in pores as large as 200 nm in the presence of low concentrations of magnesium and sulfate ions. This effect can be attributed to the effect of the pore size on the ion distribution, which becomes of increasing importance in small pores. These intriguing results suggest that organisms may exploit confinement effects to gain control over crystal polymorph.
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35
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Asha S, Ananth AN, Jose SP, Rajan MAJ. Reduced graphene oxide aerogel networks with soft interfacial template for applications in bone tissue regeneration. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0803-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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36
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Kim D, Lee B, Thomopoulos S, Jun YS. The role of confined collagen geometry in decreasing nucleation energy barriers to intrafibrillar mineralization. Nat Commun 2018; 9:962. [PMID: 29511184 PMCID: PMC5840387 DOI: 10.1038/s41467-018-03041-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 01/16/2018] [Indexed: 12/03/2022] Open
Abstract
Mineralization of collagen is critical for the mechanical functions of bones and teeth. Calcium phosphate nucleation in collagenous structures follows distinctly different patterns in highly confined gap regions (nanoscale confinement) than in less confined extrafibrillar spaces (microscale confinement). Although the mechanism(s) driving these differences are still largely unknown, differences in the free energy for nucleation may explain these two mineralization behaviors. Here, we report on experimentally obtained nucleation energy barriers to intra- and extrafibrillar mineralization, using in situ X-ray scattering observations and classical nucleation theory. Polyaspartic acid, an extrafibrillar nucleation inhibitor, increases interfacial energies between nuclei and mineralization fluids. In contrast, the confined gap spaces inside collagen fibrils lower the energy barrier by reducing the reactive surface area of nuclei, decreasing the surface energy penalty. The confined gap geometry, therefore, guides the two-dimensional morphology and structure of bioapatite and changes the nucleation pathway by reducing the total energy barrier.
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Affiliation(s)
- Doyoon Kim
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Byeongdu Lee
- X-ray Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, New York, NY, 10032, USA
| | - Young-Shin Jun
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA.
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37
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Zhang Y, Xie B, Zhang R. Morphology control of BaCO 3 by template and polymer–inorganic precursor. NEW J CHEM 2018. [DOI: 10.1039/c7nj03984k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BaCO3 nanorods are prepared in pore channels modified with polyelectrolyte layers, combining with polymer–inorganic precursor to regulate crystallization process.
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Affiliation(s)
- Yong Zhang
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education of the P. R. China
- Shandong University
- Jinan 250100
- P. R. China
| | - Beibei Xie
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education of the P. R. China
- Shandong University
- Jinan 250100
- P. R. China
| | - Renjie Zhang
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education of the P. R. China
- Shandong University
- Jinan 250100
- P. R. China
- National Engineering Technology Research Center for Colloidal Materials
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38
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Synthesis of novel amphiphilic poly( N -isopropylacrylamide)- b -poly(aspartic acid) nanomicelles for potential targeted chemotherapy in ovarian cancer. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.04.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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39
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Li S, Ihli J, Marchant WJ, Zeng M, Chen L, Wehbe K, Cinque G, Cespedes O, Kapur N, Meldrum FC. Synchrotron FTIR mapping of mineralization in a microfluidic device. LAB ON A CHIP 2017; 17:1616-1624. [PMID: 28387775 DOI: 10.1039/c6lc01393g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Fourier transform infrared micro-spectroscopy provides an effective means of performing rapid, non-destructive, and label-free analysis of specimens according to their vibrational modes. However, as water absorbs very strongly in the infrared region, analysis of aqueous solutions in transmission mode can suffer from problems with signal saturation. We here describe the fabrication of a novel microfluidic device that overcomes this problem. Devices with channel depths of just 3 μm were constructed from calcium fluoride using photolithography and hot embossing bonding, where calcium fluoride was selected due to its transparency in the IR region. The utility of this device was then demonstrated by employing it to follow the precipitation pathways of calcium sulfate and calcium carbonate using synchrotron FTIR micro-spectroscopy. Importantly, due to the high brightness provided by synchrotron radiation, and the fact that the reacting ions (HCO3-, CO32- and SO42-) and the different mineral polymorphs all have finger print spectra in the measured IR range, this method can be used to acquire time-resolved, hyperspectral maps of the mineral particles formed within the sample cell, and then study the interaction and evolution of particles. The data provide new insight into the formation pathway of a population of crystals in confined volumes, and demonstrate that this in situ, real-time detection system provides a powerful tool for studying crystallization processes.
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Affiliation(s)
- Shunbo Li
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK.
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40
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Li Y, Rodriguez-Cabello JC, Aparicio C. Intrafibrillar Mineralization of Self-Assembled Elastin-Like Recombinamer Fibrils. ACS APPLIED MATERIALS & INTERFACES 2017; 9:5838-5846. [PMID: 28127954 DOI: 10.1021/acsami.6b15285] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Biomineralization of bone, a controlled process where hydroxyapatite nanocrystals preferentially deposit in collagen fibrils, is achieved by the interplay of the collagen matrix and noncollagenous proteins. Mimicking intrafibrillar mineralization in synthetic systems is highly attractive for the development of advanced hybrid materials with elaborated morphologies and outstanding mechanical properties, as well as understanding the mechanisms of biomineralization. Inspired by nature, intrafibrillar mineralization of collagen fibrils has been successfully replicated in vitro via biomimetic systems, where acidic polymeric additives are used as analogue of noncollagenous proteins in mediating mineralization. The development of synthetic templates that mimic the structure and functions of collagenous matrix in mineralization has yet to be explored. In this study, we demonstrated that self-assembled fibrils of elastin-like recombinamers (ELRs) can induce intrafibrillar mineralization. The ELRs displayed a disordered structure at low temperature but self-assembled into nanofibrils above its inverse transition temperature. In the presence of the self-assembled ELR fibrils, polyaspartate-stabilized amorphous calcium phosphates preferentially infiltrated into the fibrils and then crystallized into hydroxyapatite nanocrystals with their [001] axes aligned parallel to the long axis of the ELR fibril. As the recombinant technology enables designing and producing well-defined ELRs, their molecular and structural properties can be fine-tuned. By examining the ultrastructure of the self-assembled ELRs fibrils as well as their mineralization, we concluded that the spatial confinement formed by a continuum β-spiral structure in an unperturbed fibrillar structure rather than electrostatic interactions or bioactive sequences in the recombinamer composition played the crucial role in inducing intrafibrillar mineralization.
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Affiliation(s)
- Yuping Li
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | | | - Conrado Aparicio
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota , Minneapolis, Minnesota 55455, United States
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41
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Nakamura K, Oaki Y, Imai H. Multistep crystal growth of oriented fluorapatite nanorod arrays for fabrication of enamel-like architectures on a polymer sheet. CrystEngComm 2017. [DOI: 10.1039/c6ce02381a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Kim D, Lee B, Thomopoulos S, Jun YS. In Situ Evaluation of Calcium Phosphate Nucleation Kinetics and Pathways during Intra- and Extrafibrillar Mineralization of Collagen Matrices. CRYSTAL GROWTH & DESIGN 2016; 16:5359-5366. [PMID: 27891066 PMCID: PMC5120680 DOI: 10.1021/acs.cgd.6b00864] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We revealed that nucleation sites within collagen fibrils determined pathways for calcium phosphate (CaP) nucleation and its transformation, from amorphous species to crystalline plates, during the biomineralization process. Using in situ small-angle X-ray scattering (SAXS), we examined the nucleation and growth of CaP within collagen matrices and elucidated how a nucleation inhibitor, polyaspartic acid (pAsp), governs mineralization kinetics and pathways at multiple length scales. Mineralization without pAsp led initially to spherical aggregates of CaP in the entire extrafibrillar spaces. With time, the spherical aggregates transformed into plates at the outermost surface of the collagen matrix, preventing intrafibrillar mineralization inside. However, mineralization with pAsp led directly to the formation of intrafibrillar CaP plates with a spatial distribution gradient through the depth of the matrix. The results illuminate mineral nucleation kinetics and real-time nanoparticle distributions within organic matrices in solutions containing body fluid components. Because the macroscale mechanical properties of collagen matrices depend on their mineral content, phase, and arrangement at the nanoscale, this study contributes to better design and fabrication of biomaterials for regenerative medicine.
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Affiliation(s)
- Doyoon Kim
- Department of Energy, Environmental & Chemical Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - Byeongdu Lee
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, New York, New York 10032-3072, United States
| | - Young-Shin Jun
- Department of Energy, Environmental & Chemical Engineering, Washington University, St. Louis, Missouri 63130, United States
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43
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Smith LJ, Deymier AC, Boyle JJ, Li Z, Linderman SW, Pasteris JD, Xia Y, Genin GM, Thomopoulos S. Tunability of collagen matrix mechanical properties via multiple modes of mineralization. Interface Focus 2016; 6:20150070. [PMID: 26855755 DOI: 10.1098/rsfs.2015.0070] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Functionally graded, mineralized collagen tissues exist at soft-to-hard material attachments throughout the body. However, the details of how collagen and hydroxyapatite mineral (HA) interact are not fully understood, hampering efforts to develop tissue-engineered constructs that can assist with repair of injuries at the attachments of soft tissues to bone. In this study, spatial control of mineralization was achieved in collagen matrices using simulated body fluids (SBFs). Based upon previous observations of poor bonding between reconstituted collagen and HA deposited using SBF, we hypothesized that mineralizing collagen in the presence of fetuin (which inhibits surface mineralization) would lead to more mineral deposition within the scaffold and therefore a greater increase in stiffness and toughness compared with collagen mineralized without fetuin. We tested this hypothesis through integrated synthesis, mechanical testing and modelling of graded, mineralized reconstituted collagen constructs. Results supported the hypothesis, and further suggested that mineralization on the interior of reconstituted collagen constructs, as promoted by fetuin, led to superior bonding between HA and collagen. The results provide us guidance for the development of mineralized collagen scaffolds, with implications for bone and tendon-to-bone tissue engineering.
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Affiliation(s)
- Lester J Smith
- Department of Orthopaedic Surgery , Washington University , St Louis, MO 63130 , USA
| | - Alix C Deymier
- Department of Orthopaedic Surgery , Washington University , St Louis, MO 63130 , USA
| | - John J Boyle
- Department of Orthopaedic Surgery, Washington University, St Louis, MO 63130, USA; Department of Biomedical Engineering, Washington University, St Louis, MO 63130, USA
| | - Zhen Li
- Department of Earth and Planetary Sciences , Washington University , St Louis, MO 63130 , USA
| | - Stephen W Linderman
- Department of Orthopaedic Surgery, Washington University, St Louis, MO 63130, USA; Department of Biomedical Engineering, Washington University, St Louis, MO 63130, USA
| | - Jill D Pasteris
- Department of Earth and Planetary Sciences , Washington University , St Louis, MO 63130 , USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA; School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Guy M Genin
- Department of Mechanical Engineering and Materials Science , Washington University , St Louis, MO 63130 , USA
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, New York, NY 10032, USA; Department of Biomedical Engineering, Columbia University, New York, NY 10032, USA
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44
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Ping H, Xie H, Wan Y, Zhang Z, Zhang J, Xiang M, Xie J, Wang H, Wang W, Fu Z. Confinement controlled mineralization of calcium carbonate within collagen fibrils. J Mater Chem B 2016; 4:880-886. [DOI: 10.1039/c5tb01990g] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The amorphous calcium carbonate infiltrates into collagen fibrils and transforms into a co-oriented crystalline phase under the function of confinement.
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Affiliation(s)
- Hang Ping
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Hao Xie
- School of Chemistry
- Chemical Engineering
- and Life Science
- Wuhan University of Technology
- Wuhan
| | - Yamin Wan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Zhixiao Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Jing Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Mingyu Xiang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Jingjing Xie
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Hao Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Weimin Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
| | - Zhengyi Fu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan
- China
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45
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Wang YN, Jiang S, Pan H, Tang R. Less is more: silicate in the crystallization of hydroxyapatite in simulated body fluids. CrystEngComm 2016. [DOI: 10.1039/c5ce01861g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dilute silicate (0.05–0.5 mM) promoted the nucleation of hydroxyapatite (HAP) in simulated body fluids, while a higher level of silicate (3–8 mM) inhibited it.
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Affiliation(s)
- Ya-Nan Wang
- Qiushi Academy for Advanced Studies
- Zhejiang University
- Hangzhou, 310027 China
- Department of Chemistry
- Zhejiang University
| | - Shuqin Jiang
- Department of Chemistry
- Zhejiang University
- Hangzhou, 310027 China
| | - Haihua Pan
- Qiushi Academy for Advanced Studies
- Zhejiang University
- Hangzhou, 310027 China
| | - Ruikang Tang
- Department of Chemistry
- Zhejiang University
- Hangzhou, 310027 China
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46
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Xu Y, van Kuringen HPC, Mulder DJ, Schenning APHJ, Sommerdijk NAJM. Smectic liquid crystal polymers as a template for ultrathin CaCO3 nanolayers. RSC Adv 2016. [DOI: 10.1039/c5ra27752c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A nanoporous smectic liquid crystalline network is infiltrated by CaCO3 crystal nanolayers with thickness of ∼1 nm.
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Affiliation(s)
- Yifei Xu
- Laboratory of Materials and Interface Chemistry & Center of Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
- The Netherlands
| | - Huub P. C. van Kuringen
- Laboratory for Functional Materials and Devices
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
- The Netherlands
| | - Dirk J. Mulder
- Laboratory for Functional Materials and Devices
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
- The Netherlands
| | - Albertus P. H. J. Schenning
- Laboratory for Functional Materials and Devices
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
- The Netherlands
| | - Nico A. J. M. Sommerdijk
- Laboratory of Materials and Interface Chemistry & Center of Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- Eindhoven
- The Netherlands
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47
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Tas AC. The use of physiological solutions or media in calcium phosphate synthesis and processing. Acta Biomater 2014; 10:1771-92. [PMID: 24389317 DOI: 10.1016/j.actbio.2013.12.047] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 12/02/2013] [Accepted: 12/17/2013] [Indexed: 11/29/2022]
Abstract
This review examined the literature to spot uses, if any, of physiological solutions/media for the in situ synthesis of calcium phosphates (CaP) under processing conditions (i.e. temperature, pH, concentration of inorganic ions present in media) mimicking those prevalent in the human hard tissue environments. There happens to be a variety of aqueous solutions or media developed for different purposes; sometimes they have been named as physiological saline, isotonic solution, cell culture solution, metastable CaP solution, supersaturated calcification solution, simulated body fluid or even dialysate solution (for dialysis patients). Most of the time such solutions were not used as the aqueous medium to perform the biomimetic synthesis of calcium phosphates, and their use was usually limited to the in vitro testing of synthetic biomaterials. This review illustrates that only a limited number of research studies used physiological solutions or media such as Earle's balanced salt solution, Bachra et al. solutions or Tris-buffered simulated body fluid solution containing 27mM HCO3(-) for synthesizing CaP, and these studies have consistently reported the formation of X-ray-amorphous CaP nanopowders instead of Ap-CaP or stoichiometric hydroxyapatite (HA, Ca10(PO4)6(OH)2) at 37°C and pH 7.4. By relying on the published articles, this review highlights the significance of the use of aqueous solutions containing 0.8-1.5 mMMg(2+), 22-27mM HCO3(-), 142-145mM Na(+), 5-5.8mM K(+), 103-133mM Cl(-), 1.8-3.75mM Ca(2+), and 0.8-1.67mM HPO4(2-), which essentially mimic the composition and the overall ionic strength of the human extracellular fluid (ECF), in forming the nanospheres of X-ray-amorphous CaP.
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Affiliation(s)
- A Cuneyt Tas
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801, USA.
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