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Huang Z, Ni X, Huang H, Tu Y, Gu Z, Zeng S. Exceptional metal-semiconductor-metal transition of lead apatites via oxygen defect tuning. Phys Chem Chem Phys 2024; 26:3029-3035. [PMID: 38179875 DOI: 10.1039/d3cp04984a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Lead apatites, distinguished and compelling bulk materials with the stoichiometric arrangement as Pb10(POx)6Oy, are renowned for their structural complexity. Recently, the discovery of possible room-temperature superconductivity under ambient pressure in copper-substituted lead apatites has engendered considerable interest within both the physics community and beyond. Nevertheless, exploration of pristine Pb10(POx)6Oy parent structures has hitherto remained elusive. In this study, we employ density functional theory (DFT) calculations to investigate the effects of oxygen defects on the electronic structures of Pb10(POx)6Oy and Pb9Cu(POx)6Oy. We scrutinize two distinct categories of defects: oxygen atoms enmeshed within POx groups (Ox) and solitary oxygen atoms (Oy). Our investigation uncovers a profound influence of these defects on the band structure. Specifically, the introduction of Oy defects prompts a remarkable transition in Pb10(PO4)6Oy from a metal to semiconductor to metal state, accompanied by pivotal shifts in the principal electronic contributors from p orbitals of Oy to those of Pb atoms. Furthermore, the introduction of Ox defects in Pb10(POx)6O1 engenders metamorphosis in the band structure, transmuting it from a semiconductor to a metallic state. Significantly, our findings pinpoint the suitable range of x in the Pb10(POx)6O1 configuration as lying between 2 and 4. Additionally, our study also demonstrates that the oxygen defects (Ox/Oy) do not affect the metallic properties of copper-substituted lead apatites. This study elucidates the significant role of oxygen defects in modulating the electronic properties of apatite materials, offering insights into potential interdisciplinary applications. This establishes a crucial link between material composition and electronic behavior, revealing key mechanisms for engineering functionality in lead apatites and other advanced materials.
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Affiliation(s)
- Zhijing Huang
- College of Physical Science and Technology, Yangzhou University, Jiangsu, 225009, China.
| | - Xiaojian Ni
- School of Mechanical and Electrical Engineering, Wuzhou Vocational College, Guangxi, 543000, China
| | - Hao Huang
- Advanced Copper Industry College, Jiangxi University of Science and Technology, Yingtan 335000, China
| | - Yusong Tu
- College of Physical Science and Technology, Yangzhou University, Jiangsu, 225009, China.
| | - Zonglin Gu
- College of Physical Science and Technology, Yangzhou University, Jiangsu, 225009, China.
| | - Shuming Zeng
- College of Physical Science and Technology, Yangzhou University, Jiangsu, 225009, China.
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2
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Luo X, Niu J, Su G, Zhou L, Zhang X, Liu Y, Wang Q, Sun N. Research progress of biomimetic materials in oral medicine. J Biol Eng 2023; 17:72. [PMID: 37996886 PMCID: PMC10668381 DOI: 10.1186/s13036-023-00382-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 10/02/2023] [Indexed: 11/25/2023] Open
Abstract
Biomimetic materials are able to mimic the structure and functional properties of native tissues especially natural oral tissues. They have attracted growing attention for their potential to achieve configurable and functional reconstruction in oral medicine. Though tremendous progress has been made regarding biomimetic materials, significant challenges still remain in terms of controversy on the mechanism of tooth tissue regeneration, lack of options for manufacturing such materials and insufficiency of in vivo experimental tests in related fields. In this review, the biomimetic materials used in oral medicine are summarized systematically, including tooth defect, tooth loss, periodontal diseases and maxillofacial bone defect. Various theoretical foundations of biomimetic materials research are reviewed, introducing the current and pertinent results. The benefits and limitations of these materials are summed up at the same time. Finally, challenges and potential of this field are discussed. This review provides the framework and support for further research in addition to giving a generally novel and fundamental basis for the utilization of biomimetic materials in the future.
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Affiliation(s)
- Xinyu Luo
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, No. 117 Nanjing North Street, Shenyang, 110001, China
| | - Jiayue Niu
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, No. 117 Nanjing North Street, Shenyang, 110001, China
| | - Guanyu Su
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, No. 117 Nanjing North Street, Shenyang, 110001, China
| | - Linxi Zhou
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, 200011, China.
- National Center for Stomatology, Shanghai, 200011, China.
- National Clinical Research Center for Oral Diseases, Shanghai, 200011, China.
- Shanghai Key Laboratory of Stomatology, Shanghai, 200011, China.
| | - Xue Zhang
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, No. 117 Nanjing North Street, Shenyang, 110001, China
| | - Ying Liu
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, No. 117 Nanjing North Street, Shenyang, 110001, China
| | - Qiang Wang
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, No. 117 Nanjing North Street, Shenyang, 110001, China
| | - Ningning Sun
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, No. 117 Nanjing North Street, Shenyang, 110001, China.
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3
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Uskoković V. Learning from a dark brew: how traditional coffee-making can inspire the search for improved colloidal stability. J DISPER SCI TECHNOL 2023. [DOI: 10.1080/01932691.2023.2180387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Affiliation(s)
- Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, TardigradeNano, Irvine, California, USA
- Department of Mechanical Engineering, San Diego State University, San Diego, California, USA
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4
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Uskoković V. Toward functionalization without functional agents: An X-ray photoelectron spectroscopy study. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Uskoković V, Wu VM. Altering Microbiomes with Hydroxyapatite Nanoparticles: A Metagenomic Analysis. MATERIALS (BASEL, SWITZERLAND) 2022; 15:5824. [PMID: 36079205 PMCID: PMC9456825 DOI: 10.3390/ma15175824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
Hydroxyapatite (HAp), the most abundant biological material among mammals, has been recently demonstrated to possess moderate antibacterial properties. Metagenomics provides a series of tools for analyzing the simultaneous interaction of materials with larger communities of microbes, which may aid in optimizing the antibacterial activity of a material such as HAp. Here, a microbiome intrinsic to the sample of sandy soil collected from the base of an African Natal plum (Carissa macrocarpa) shrub surrounding the children's sandbox at the Arrowhead Park in Irvine, California was challenged with HAp nanoparticles and analyzed with next-generation sequencing for hypervariable 16S ribosomal DNA base pair homologies. HAp nanoparticles overwhelmingly reduced the presence of Gram-negative phyla, classes, orders, families, genera and species, and consequently elevated the relative presence of their Gram-positive counterparts. Thermodynamic, electrostatic and chemical bonding arguments were combined in a model proposed to explain this selective affinity. The ability of amphiphilic surface protrusions of lipoteichoic acid in Gram-positive bacteria and mycolic acid in mycobacteria to increase the dispersibility of the bacterial cells and assist in their resistance to capture by the solid phase is highlighted. Within the Gram-negative group, the variability of the distal, O-antigen portion of the membrane lipopolysaccharide was shown to be excessive and the variability of its proximal, lipid A portion insufficient to explain the selectivity based on chemical sequence arguments. Instead, flagella-driven motility proves to be a factor favoring the evasion of binding to HAp. HAp displayed a preference toward binding to less pathogenic bacteria than those causative of disease in humans, while taxa having a positive agricultural effect were largely captured by HAp, indicating an evolutionary advantage this may have given it as a biological material. The capacity to selectively sequester Gram-negative microorganisms and correspondingly alter the composition of the microbiome may open up a new avenue in environmental and biomedical applications of HAp.
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Affiliation(s)
- Vuk Uskoković
- TardigradeNano LLC, Irvine, CA 92604, USA;
- Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182, USA
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Dorozhkin SV. Synthetic amorphous calcium phosphates (ACPs): preparation, structure, properties, and biomedical applications. Biomater Sci 2021; 9:7748-7798. [PMID: 34755730 DOI: 10.1039/d1bm01239h] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Amorphous calcium phosphates (ACPs) represent a metastable amorphous state of other calcium orthophosphates (abbreviated as CaPO4) possessing variable compositional but rather identical glass-like physical properties, in which there are neither translational nor orientational long-range orders of the atomic positions. In nature, ACPs of a biological origin are found in the calcified tissues of mammals, some parts of primitive organisms, as well as in the mammalian milk. Manmade ACPs can be synthesized in a laboratory by various methods including wet-chemical precipitation, in which they are the first solid phases, precipitated after a rapid mixing of aqueous solutions containing dissolved ions of Ca2+ and PO43- in sufficient amounts. Due to the amorphous nature, all types of synthetic ACPs appear to be thermodynamically unstable and, unless stored in dry conditions or doped by stabilizers, they tend to transform spontaneously to crystalline CaPO4, mainly to ones with an apatitic structure. This intrinsic metastability of the ACPs is of a great biological relevance. In particular, the initiating role that metastable ACPs play in matrix vesicle biomineralization raises their importance from a mere laboratory curiosity to that of a reasonable key intermediate in skeletal calcifications. In addition, synthetic ACPs appear to be very promising biomaterials both for manufacturing artificial bone grafts and for dental applications. In this review, the current knowledge on the occurrence, structural design, chemical composition, preparation, properties, and biomedical applications of the synthetic ACPs have been summarized.
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Wang J, Liu Z, Ren B, Wang Q, Wu J, Yang N, Sui X, Li L, Li M, Zhang X, Li X, Wang B. Biomimetic mineralisation systems for in situ enamel restoration inspired by amelogenesis. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:115. [PMID: 34455518 PMCID: PMC8403113 DOI: 10.1007/s10856-021-06583-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 07/05/2021] [Indexed: 05/28/2023]
Abstract
Caries and dental erosion are common oral diseases. Traditional treatments involve the mechanical removal of decay and filling but these methods are not suitable for cases involving large-scale enamel erosion, such as hypoplasia. To develop a noninvasive treatment, promoting remineralisation in the early stage of caries is of considerable clinical significance. Therefore, biomimetic mineralisation is an ideal approach for restoring enamel. Biomimetic mineralisation forms a new mineral layer that is tightly attached to the surface of the enamel. This review details the state-of-art achievements on the application of amelogenin and non-amelogenin, amorphous calcium phosphate, ions flow and other techniques in the biomimetic mineralisation of enamel. The ultimate goal of this review was to shed light on the requirements for enamel biomineralisation. Hence, herein, we summarise two strategies of biological minimisation systems for in situ enamel restoration inspired by amelogenesis that have been developed in recent years and compare their advantages and disadvantages.
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Affiliation(s)
- Jue Wang
- Department of Obsterics and Gynecology, The Second Hospital of Jilin University, Changchun, Jilin, China
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Zhihui Liu
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Bingyu Ren
- Department of Thyroid surgery, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Qian Wang
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Jia Wu
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Nan Yang
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Xin Sui
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Lingfeng Li
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Meihui Li
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Xiao Zhang
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Xinyue Li
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, Changchun, Jilin, China
| | - Bowei Wang
- Department of Obsterics and Gynecology, The Second Hospital of Jilin University, Changchun, Jilin, China.
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8
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Wu VM, Huynh E, Tang S, Uskoković V. Calcium phosphate nanoparticles as intrinsic inorganic antimicrobials: mechanism of action. Biomed Mater 2020; 16:015018. [DOI: 10.1088/1748-605x/aba281] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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9
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Organic molecule enhanced 1O2 electrochemiluminescence from the phase transformation of amorphous calcium phosphate. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.137062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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10
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Uskoković T, Uskoković E, Wu V, Uskoković V. Calcium Phosphate and Senescence of Orange Jubilees in the Summertime. ACS APPLIED BIO MATERIALS 2020; 3:3770-3784. [DOI: 10.1021/acsabm.0c00357] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Theo Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, 7 Park Vista, Irvine, California 92604, United States
| | - Evangelina Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, 7 Park Vista, Irvine, California 92604, United States
| | - Victoria Wu
- Advanced Materials and Nanobiotechnology Laboratory, 7 Park Vista, Irvine, California 92604, United States
- MP Biomedicals, 9 Goddard, Irvine, California 92618, United States
| | - Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, 7 Park Vista, Irvine, California 92604, United States
- Department of Mechanical and Aerospace Engineering, University of California, Irvine, Engineering Gateway 4200, Irvine, California 92697, United States
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11
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Ramírez-Rodríguez GB, Dal Sasso G, Carmona FJ, Miguel-Rojas C, Pérez-de-Luque A, Masciocchi N, Guagliardi A, Delgado-López JM. Engineering Biomimetic Calcium Phosphate Nanoparticles: A Green Synthesis of Slow-Release Multinutrient (NPK) Nanofertilizers. ACS APPLIED BIO MATERIALS 2020; 3:1344-1353. [DOI: 10.1021/acsabm.9b00937] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Gloria B. Ramírez-Rodríguez
- Department of Inorganic Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain
- Department of Science and High Technology and To.Sca.Lab., University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Gregorio Dal Sasso
- Institute of Crystallography and To.Sca.Lab. Consiglio Nazionale delle Ricerche (IC−CNR), Via Valleggio 11, I-22100 Como, Italy
| | - Francisco J. Carmona
- Department of Science and High Technology and To.Sca.Lab., University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Cristina Miguel-Rojas
- Department of Science and High Technology and To.Sca.Lab., University of Insubria, Via Valleggio 11, I-22100 Como, Italy
- IFAPA Alameda del Obispo, Area of Genomic and Biotechnology, Avenida Menéndez Pidal, S/N, 14004 Córdoba, Spain
| | - Alejandro Pérez-de-Luque
- IFAPA Alameda del Obispo, Area of Genomic and Biotechnology, Avenida Menéndez Pidal, S/N, 14004 Córdoba, Spain
| | - Norberto Masciocchi
- Department of Science and High Technology and To.Sca.Lab., University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Antonietta Guagliardi
- Institute of Crystallography and To.Sca.Lab. Consiglio Nazionale delle Ricerche (IC−CNR), Via Valleggio 11, I-22100 Como, Italy
| | - José M. Delgado-López
- Department of Inorganic Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain
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12
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Uskoković V. X-ray photoelectron and ion scattering spectroscopic surface analyses of amorphous and crystalline calcium phosphate nanoparticles with different chemical histories. Phys Chem Chem Phys 2020; 22:5531-5547. [PMID: 32123882 DOI: 10.1039/c9cp06529f] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The surface of hydroxyapatite nanoparticles is enriched in the topmost atomic layer with calcium and depleted of it elsewhere, alongside being dependent on the history of formation of hydroxyapatite from the amorphous precursor.
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Affiliation(s)
- Vuk Uskoković
- Department of Mechanical and Aerospace Engineering
- University of California Irvine
- Irvine
- USA
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13
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Abstract
Scientific articles have been traditionally written from single points of view. In contrast, new knowledge is derived strictly from a dialectical process, through interbreeding of partially disparate perspectives. Dialogues, therefore, present a more veritable form for representing the process behind knowledge creation. They are also less prone to dogmatically disseminate ideas than monologues, alongside raising awareness of the necessity for discussion and challenging of differing points of view, through which knowledge evolves. Here we celebrate 250 years since the discovery of the chemical identity of the inorganic component of bone in 1769 by Johan Gottlieb Gahn through one such imaginary dialogue between two seasoned researchers and aficionados of this material. We provide the statistics on ups and downs in the popularity of this material throughout the history and also discuss important achievements and challenges associated with it. The shadow of Samuel Beckett's Waiting for Godot is cast over the dialogue, acting as its frequent reference point and the guide. With this dialogue presented in the format of a play, we provide hope that conversational or dramaturgical compositions of scientific articles - albeit virtually prohibited from the scientific literature of the day - may become more pervasive in the future.
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Affiliation(s)
| | - Vuk Uskoković
- 7 Park Vista, Irvine, CA 92604, USA
- Department of Bioengineering, University of Illinois, Chicago, IL 60607, USA
- Corresponding author: ;
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Uskoković V. Mechanism of formation governs the mechanism of release of antibiotics from calcium phosphate nanopowders and cements in a drug-dependent manner. J Mater Chem B 2019; 7:3982-3992. [PMID: 31681475 PMCID: PMC6824273 DOI: 10.1039/c9tb00444k] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The kinetics of drug release from hydroxyapatite (HAp) cements could be tuned by controlling the kinetics of crystallization of their HAp precursor powders during synthesis. Here it is shown that this history of formation affects not only the kinetics, but also the mechanism of release. Cements composed of two HAp powders precipitated under different conditions, one (HAp2) taking twice longer to transform from the amorphous to the crystalline state than the other (HAp1), were mixed at different ratios to tune their drug release kinetics and tested for the release mechanism in conjunction with compositional and microstructural analyses. While the cement component converting to the amorphous phase during gelation (HAp2) exhibited a faster, but also more anomalous, non-Fickian mechanism of release of vancomycin, the cement component retaining its crystalline state all throughout gelation, setting and hardening (HAp1) stabilized at the ideal, Fickian diffusion case corresponding to the Korsmeyer-Peppas exponent value of 0.45 ± 0.02. This effect got reversed for the other antibiotic studied as a drug, ciprofloxacin, in which case HAp2 exhibited the ideal, Fickian diffusion with n = 0.45 ± 0.02 and the increase in the content of the cement component retaining its crystallinity during gelation, setting and hardening (HAp1) steadily shifted the mechanism of release to more anomalous, non-Fickian types. This has indicated that the molecular structure of the drug is an essential determinant of the mechanism of release and that the design of a carrier for a universally tunable release of drugs based on the passive transport is likely impossible. Preliminary assays involving the addition of chitosan or gelatin as polymeric components to HAp led to the inclusion of swelling and erosion as additional effects by which the drug escapes the carrier and shifted the release toward less diffusional and more multimodal mechanisms. With regard to the microstructural and compositional effects governing the release mechanism and kinetics, the retention of a finite concentration of slit-like pores of the amorphous precursor in HAp2 and its lower surface energy and lesser drug binding potential in the gelled, amorphous state, but also its possibly less stable and more diffusive particle surface and higher structural water content were elaborated as potential reasons explaining the distinct rates and mechanisms of release from the two HAp powders with different histories of formation.
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Affiliation(s)
- Vuk Uskoković
- Department of Bioengineering, University of Illinois, Chicago, IL, USA
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Uskoković V, Janković-Častvan I, Wu VM. Bone Mineral Crystallinity Governs the Orchestration of Ossification and Resorption during Bone Remodeling. ACS Biomater Sci Eng 2019; 5:3483-3498. [DOI: 10.1021/acsbiomaterials.9b00255] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Vuk Uskoković
- Department of Mechanical and Aerospace Engineering, University of California, Irvine, Engineering Gateway 4200, Irvine, California 92697, United States
- Department of Bioengineering, University of Illinois, 851 South Morgan Street, Chicago, Illinois 60607-7052, United States
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, 1600 Fourth Street, San Francisco, California 94158, United States
| | - Ivona Janković-Častvan
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade 11000, Serbia
| | - Victoria M. Wu
- Department of Bioengineering, University of Illinois, 851 South Morgan Street, Chicago, Illinois 60607-7052, United States
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16
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Calcium phosphate nanoparticles as intrinsic inorganic antimicrobials: In search of the key particle property. Biointerphases 2019; 14:031001. [PMID: 31109162 DOI: 10.1116/1.5090396] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
One of the main goals of materials science in the 21st century is the development of materials with rationally designed properties as substitutes for traditional pharmacotherapies. At the same time, there is a lack of understanding of the exact material properties that induce therapeutic effects in biological systems, which limits their rational optimization for the related medical applications. This study sets the foundation for a general approach for elucidating nanoparticle properties as determinants of antibacterial activity, with a particular focus on calcium phosphate nanoparticles. To that end, nine physicochemical effects were studied and a number of them were refuted, thus putting an end to frequently erred hypotheses in the literature. Rather than having one key particle property responsible for eliciting the antibacterial effect, a complex synergy of factors is shown to be at work, including (a) nanoscopic size; (b) elevated intracellular free calcium levels due to nanoparticle solubility; (c) diffusivity and favorable electrostatic properties of the nanoparticle surface, primarily low net charge and high charge density; and (d) the dynamics of perpetual exchange of ultrafine clusters across the particle/solution interface. On the positive side, this multifaceted mechanism is less prone to induce bacterial resistance to the therapy and can be a gateway to the sphere of personalized medicine. On a more problematic side, it implies a less intense effect compared to single-target molecular therapies and a difficulty of elucidating the exact mechanisms of action, while also making the rational design of theirs for this type of medical application a challenge.
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17
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Niu H, Ma Y, Wu G, Duan B, Wang Y, Yuan Y, Liu C. Multicellularity-interweaved bone regeneration of BMP-2-loaded scaffold with orchestrated kinetics of resorption and osteogenesis. Biomaterials 2019; 216:119216. [PMID: 31138454 DOI: 10.1016/j.biomaterials.2019.05.027] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 05/14/2019] [Accepted: 05/16/2019] [Indexed: 12/19/2022]
Abstract
Synchronization of material resorption and new bone formation is vital to achieve harmonious bone regeneration in the treatment of large bone defects. To exposit the resorption/osteogenesis properties in the guided bone repairing, rhBMP-2-loaded trimodal macro/micro/nano-porous bioactive glass scaffolds (TMS-rhBMP-2) were set as substrate model. We penetratingly investigated the particular function of hierarchical structure and incorporated rhBMP-2 in the resorption/osteogenesis, and dissected the cellular interplay throughout the regenerative procedure. The results suggested that rhBMP-2 significantly facilitated osteoclastogenesis-mediated scaffold degradation and strikingly up-regulated mesenchymal stem cells (MSCs)-involved osteogenesis in vitro. Further gene microarray and related proteins expression indicated that in the presence of rhBMP-2, MSCs rather than differentiated MSCs could exert synergistic effects on osteoclastogenesis, osteoclasts maturation and resorptive function; meanwhile, rhBMP-2-induced MSCs osteogenesis was also strengthened by the osteoclasts. In vivo micro-CT, X-ray, kinetic and histological analyses qualitatively and quantitively demonstrated the optimized coupling of bioresorption/osteogenesis and the most rapid regeneration in TMS-rhBMP-2. Consequently, with rhBMP-2 acted as ignitor and MSCs/osteoclasts interaction as booster, a harmonious bone regeneration was obtained. Besides, long-term magnetic resonance imaging (MRI) in virtue of Gd3+ suggested that the degradation products mainly distributed in liver and spleen, verifying the accumulation/discharge profiles and safety application of TMS-rhBMP-2 system in vivo. This study will not merely provide guidance for the design of clinical bone repairing materials, but shed substantial light on the multicell-mediated tissue regeneration.
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Affiliation(s)
- Haoyi Niu
- Engineering Research Center for Biomaterials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China; Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Yifan Ma
- Engineering Research Center for Biomaterials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China; Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Guangyu Wu
- Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200237, PR China
| | - Bing Duan
- Engineering Research Center for Biomaterials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China; Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Ying Wang
- Engineering Research Center for Biomaterials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China; Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Yuan Yuan
- Engineering Research Center for Biomaterials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China; Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Changsheng Liu
- Engineering Research Center for Biomaterials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China; Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China; The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
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Jokisaari JR, Wang C, Qiao Q, Hu X, Reed DA, Bleher R, Luan X, Klie RF, Diekwisch TG. Particle-Attachment-Mediated and Matrix/Lattice-Guided Enamel Apatite Crystal Growth. ACS NANO 2019; 13:3151-3161. [PMID: 30763075 PMCID: PMC7067265 DOI: 10.1021/acsnano.8b08668] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Tooth enamel is a hard yet resilient biomaterial that derives its unique mechanical properties from decussating bundles of apatite crystals. To understand enamel crystal nucleation and growth at a nanoscale level and to minimize preparation artifacts, the developing mouse enamel matrix was imaged in situ using graphene liquid cells and atomic resolution scanning transmission electron and cryo-fracture electron microscopy. We report that 1-2 nm diameter mineral precipitates aggregated to form larger 5 nm particle assemblies within ameloblast secretory vesicles or annular organic matrix subunits. Further evidence for the fusion of 1-2 nm mineral precipitates into 5 nm mineral aggregates via particle attachment was provided by matrix-mediated calcium phosphate crystal growth studies. As a next step, aggregated particles organized into rows of 3-10 subunits and developed lattice suprastructures with 0.34 nm gridline spacings corresponding to the (002) planes of apatite crystals. Mineral lattice suprastructures superseded closely matched organic matrix patterns, suggestive of a combination of organic/inorganic templates guiding apatite crystal growth. Upon assembly of 2-5 nm subunits into crystal ribbons, lattice fringes indicative of the presence of larger ordered crystallites were observed surrounding elongating crystal ribbons, presumably guiding the c-axis growth of composite apatite crystals. Cryo-fracture micrographs revealed reticular networks of an organic matrix on the surface of elongating enamel crystal ribbons, suggesting that protein coats facilitate c-axis apatite crystal growth. Together, these data demonstrate (i) the involvement of particle attachment in enamel crystal nucleation, (ii) a combination of matrix- and lattice-guided crystal growth, and (iii) fusion of individual crystals via a mechanism similar to Ostwald ripening.
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Affiliation(s)
- Jacob R. Jokisaari
- UIC Department of Physics. 845 West Taylor Street, Chicago IL 60607, USA
| | - Canhui Wang
- UIC Department of Physics. 845 West Taylor Street, Chicago IL 60607, USA
| | - Qiao Qiao
- UIC Department of Physics. 845 West Taylor Street, Chicago IL 60607, USA
- Brookhaven National Laboratory, Condensed Matter Physics and Materials Science Department, 98 Rochester Street, Building 480, Upton NY 11973 USA
| | - Xuan Hu
- UIC Department of Physics. 845 West Taylor Street, Chicago IL 60607, USA
| | - David A. Reed
- UIC Department of Oral Biology, 801 South Paulina, Chicago IL 60612, USA
| | - Reiner Bleher
- Northwestern University, Department of Materials Science and Engineering, NUANCE/BioCryo, 2145 Sheridan Road, Evanston IL 60208, USA
| | - Xianghong Luan
- UIC Department of Oral Biology, 801 South Paulina, Chicago IL 60612, USA
| | - Robert F. Klie
- UIC Department of Physics. 845 West Taylor Street, Chicago IL 60607, USA
| | - Thomas G.H. Diekwisch
- UIC Department of Oral Biology, 801 South Paulina, Chicago IL 60612, USA
- TAMU Center for Craniofacial Research and Diagnosis, 3302 Gaston Avenue, Dallas TX 75246, USA
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19
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Uskoković V, Marković S, Veselinović L, Škapin S, Ignjatović N, Uskoković DP. Insights into the kinetics of thermally induced crystallization of amorphous calcium phosphate. Phys Chem Chem Phys 2018; 20:29221-29235. [PMID: 30427330 PMCID: PMC6327086 DOI: 10.1039/c8cp06460a] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transformations between amorphous and crystalline apatite mechanistically govern some of the most essential processes in bone metabolism, including biomineralization and bone remodeling. Fundamental understanding of this phase transition can help us gain control over the formation and dissolution of boney tissues in vivo and utilize that knowledge for various therapeutic ends. Crystallization of hydroxyapatite (HAp) and two tricalcium phosphate (TCP) polymorphs from the metastable precursor, amorphous calcium phosphate (ACP) was here studied kinetically and mechanistically using thermal analyses, X-ray diffraction and Fourier-transform infrared spectroscopy. Crystallization was detected in the differential thermal analysis as the exothermic peak at 639.5 °C at the slowest heating regimen of 5 °C min-1, while a combination of different kinetics models, including Augis-Bennett, Borchardt-Daniels, Johnson-Mehl-Avrami, Kissinger, Ozawa and Piloyan, yielded activation energies in the 435-450 kJ mol-1 range. Dehydrated ACP required a significant energy input to transform to HAp, thus indirectly proving the key role that structural water plays in this process in a biological setting. The phase transformation at high temperatures involved preformed nuclei and was solely due to their 3D growth, contrasting the edge-controlled nucleation derived earlier as the mechanism of growth in the solution. Crystallization was in both cases accompanied by the formation of needle-shape crystals of HAp through aggregation of ultrafine spherical units of ACP. Relationship between crystallinity and the heating rate was detected only for the initially amorphous structure, indicating a more intense and coherent lattice ordering process in annealed ACP than in HAp. Despite that, crystallization disobeyed the rule of inverse proportionality between the thermal energy required for the relaxation of defects and the level of strain, as the recovery rate of the initially poorly crystalline HAp was higher than that of ACP.
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Affiliation(s)
- Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, IL, USA.
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20
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Wang Z, Ouyang Y, Wu Z, Zhang L, Shao C, Fan J, Zhang L, Shi Y, Zhou Z, Pan H, Tang R, Fu B. A novel fluorescent adhesive-assisted biomimetic mineralization. NANOSCALE 2018; 10:18980-18987. [PMID: 30191236 DOI: 10.1039/c8nr02078g] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We propose a novel fluorescent adhesive-assisted biomimetic mineralization strategy, based on which 1 wt% of sodium fluorescein and 25 wt% of polyacrylic acid stabilized amorphous calcium phosphate (PAA-ACP) nanoparticles were incorporated into a mild self-etch adhesive (Clearfil S3 Bond) as a fluorescent mineralizing adhesive. The characterization of the PAA-ACP nanoparticles indicates that they were spherical particles clustered together, each particle with a diameter of approximately 20-50 nm, in a metastable phase with two characteristic absorption peaks (1050 cm-1 and 580 cm-1). Our results suggest that the fluorescent mineralizing adhesive was non-cytotoxic with minimal esthetic interference and its fluorescence intensity did not significantly decrease within 6 months. Our data reveal that the fluorescent mineralizing adhesive could induce the extra- and intra-fibrillar remineralization of the reconstituted type I collagen, the demineralized enamel and dentin substrate. Our data demonstrate that a novel fluorescent adhesive-assisted biomimetic mineralization strategy will pave the way to design and produce anti-carious materials for the prevention of dental caries.
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Affiliation(s)
- Zhe Wang
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Zhejiang University School of Medicine, Hangzhou 310006, Zhejiang, China.
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21
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Tripathi G, Sugiura Y, Kareiva A, Garskaite E, Tsuru K, Ishikawa K. Feasibility evaluation of low-crystallinity β-tricalcium phosphate blocks as a bone substitute fabricated by a dissolution-precipitation reaction from α-tricalcium phosphate blocks. J Biomater Appl 2018; 33:259-270. [PMID: 30033849 DOI: 10.1177/0885328218788255] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Although sintered β-tricalcium phosphate blocks have been used clinically as artificial bone substitutes, the crystallinity of β-tricalcium phosphate, which might dominate biocompatibility, is extremely high. The objective of this study is to evaluate the feasibility of fabricating low-crystallinity β-tricalcium phosphate blocks, which are expected to exhibit good biocompatibility via a dissolution-precipitation reaction of α-tricalcium phosphate blocks as a precursor under hydrothermal conditions at 200°C for 24 h. Although β-tricalcium phosphate is a metastable phase, the presence of Mg2+ in the reaction solution inhibits the formation of its corresponding stable phase and induces β-tricalcium phosphate formation under acidic conditions. It was found that low-crystallinity β-tricalcium phosphate blocks could be fabricated from α-tricalcium phosphate blocks immersed in 1.0 mol/L MgCl2 + 0.1 mol/L NaH2PO4 solution while maintaining the shape of the α-tricalcium phosphate blocks. The crystallite size of the fabricated β-tricalcium phosphate blocks was 42 nm, which was substantially smaller than that of the sintered β-tricalcium phosphate blocks. When the fabricated β-tricalcium phosphate blocks were implanted into bone defects in rabbit femurs, they exhibited excellent tissue responses. In particular, the initial osteoconductivity (two and four weeks) was substantially greater than that of sintered β-tricalcium phosphate blocks.
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Affiliation(s)
- Garima Tripathi
- 1 Faculty of Dental Science, Kyushu University, Miadashi, Higashi-Ku, Fukuoka, Japan
| | - Yuki Sugiura
- 2 Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Hayashi-cho, Takamatsu, Kagawa, Japan
| | - Aivaras Kareiva
- 3 Institute of Chemistry Faculty of Chemistry and Geosciences, Vilnius University, Vilnius, Lithuania
| | - Edita Garskaite
- 3 Institute of Chemistry Faculty of Chemistry and Geosciences, Vilnius University, Vilnius, Lithuania
| | - Kanji Tsuru
- 4 Section of Bioengineering, Department of Dental Engineering, Fukuoka Dental College, Fukuoka, Japan
| | - Kunio Ishikawa
- 1 Faculty of Dental Science, Kyushu University, Miadashi, Higashi-Ku, Fukuoka, Japan
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