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Li K, Xue Y, Yan T, Zhang L, Han Y. Si substituted hydroxyapatite nanorods on Ti for percutaneous implants. Bioact Mater 2020; 5:116-123. [PMID: 32021946 PMCID: PMC6994265 DOI: 10.1016/j.bioactmat.2020.01.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 12/15/2022] Open
Abstract
An ideal intraosseous transcutaneous implant should form a tight seal with soft tissue, besides a requirement of osseointegration at the bone-fixed position. Si substituted hydroxyapatite (Si-HA) nanorods releasing Si ion and simulating nanotopography of natural tissue were designed on Ti to enhance fibroblast response in vitro and biosealing with soft tissue in vivo. Si-HA nanorods were fabricated by alkali-heat treatment followed with hydrothermal treatment. The hydrothermal formation mechanism of Si-HA nanorods was explored. The surface characteristic of Si-HA nanorods was compared with pure HA nanorods. Fibroblast behaviors in vitro and skin response in vivo on different surfaces were also evaluated. The obtained results show that the substitution of Si did not significantly alter the phase component, morphology, roughness and wettability of HA, but additional Si and more Ca were released from Si-HA into medium. Comparing to pure HA nanrods and Ti substrate, Si-HA nanrods enhanced cell behaviors including proliferation, fibrotic phenotype and collagen secretion in vitro, and reduced epithelial down growth in vivo. The enhanced cell response and biosealing should be due to the releasing of Ca, Si and nanotopography of Si-HA nanorods. Si-HA nanorods can be a potential coating to accelerate skin integration for percutaneous implants in clinic.
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Affiliation(s)
| | | | | | - Lan Zhang
- State-key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Yong Han
- State-key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
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102
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Molino G, Palmieri MC, Montalbano G, Fiorilli S, Vitale-Brovarone C. Biomimetic and mesoporous nano-hydroxyapatite for bone tissue application: a short review. Biomed Mater 2020; 15:022001. [DOI: 10.1088/1748-605x/ab5f1a] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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103
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Garbo C, Locs J, D'Este M, Demazeau G, Mocanu A, Roman C, Horovitz O, Tomoaia-Cotisel M. Advanced Mg, Zn, Sr, Si Multi-Substituted Hydroxyapatites for Bone Regeneration. Int J Nanomedicine 2020; 15:1037-1058. [PMID: 32103955 PMCID: PMC7025681 DOI: 10.2147/ijn.s226630] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Accepted: 12/03/2019] [Indexed: 12/14/2022] Open
Abstract
Purpose Compositional tailoring is gaining more attention in the development of advanced biomimetic nanomaterials. In this study, we aimed to prepare advanced multi-substituted hydroxyapatites (ms-HAPs), which show similarity with the inorganic phase of bones and might have therapeutic potential for bone regeneration. Materials Novel nano hydroxyapatites substituted simultaneously with divalent cations: Mg2+ (1.5%), Zn2+ (0.2%), Sr2+ (5% and 10%), and Si (0.2%) as orthosilicate (SiO44-) were designed and successfully synthesized for the first time. Methods The ms-HAPs were obtained via a wet-chemistry precipitation route without the use of surfactants, which is a safe and ecologically friendly method. The composition of synthesized materials was determined by inductively coupled plasma optical emission spectrometry (ICP-OES). The materials were characterized by X-ray powder diffraction (XRD), FT-IR and FT-Raman spectroscopy, BET measurements and by imaging techniques using high-resolution TEM (HR-TEM), FE-SEM coupled with EDX, and atomic force microscopy (AFM). The ion release was measured in water and in simulated body fluid (SBF). Results Characterization methods confirmed the presence of the unique phase of pure stoichiometric HAP structure and high compositional purity of all synthesized nanomaterials. The doping elements influenced the crystallite size, the crystallinity, lattice parameters, morphology, particle size and shape, specific surface area, and porosity. Results showed a decrease in both nanoparticle size and crystallinity degree, coupled with an increase in specific surface area of these advanced ms-HAP materials, in comparison with pure stoichiometric HAP. The release of biologically important ions was confirmed in different liquid media, both in static and simulated dynamic conditions. Conclusion The incorporation of the four substituting elements into the HAP structure is demonstrated. Synthesized nanostructured ms-HAP materials might inherit the in vivo effects of substituting functional elements and properties of hydroxyapatite for bone healing and regeneration. Results revealed a rational tailoring approach for the design of a next generation of bioactive ms-HAPs as promising candidates for bone regeneration.
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Affiliation(s)
- Corina Garbo
- Babes-Bolyai University of Cluj-Napoca, Faculty of Chemistry and Chemical Engineering, Physical Chemistry Centre, Chemical Engineering Department, Cluj-Napoca 400028, Romania
| | - Janis Locs
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Riga LV-1007, Latvia
| | - Matteo D'Este
- AO Research Institute Davos, Davos Platz 7270, Switzerland
| | | | - Aurora Mocanu
- Babes-Bolyai University of Cluj-Napoca, Faculty of Chemistry and Chemical Engineering, Physical Chemistry Centre, Chemical Engineering Department, Cluj-Napoca 400028, Romania
| | - Cecilia Roman
- INCDO INOE 2000, Research Institute for Analytical Instrumentation, Cluj-Napoca 400293, Romania
| | - Ossi Horovitz
- Babes-Bolyai University of Cluj-Napoca, Faculty of Chemistry and Chemical Engineering, Physical Chemistry Centre, Chemical Engineering Department, Cluj-Napoca 400028, Romania
| | - Maria Tomoaia-Cotisel
- Babes-Bolyai University of Cluj-Napoca, Faculty of Chemistry and Chemical Engineering, Physical Chemistry Centre, Chemical Engineering Department, Cluj-Napoca 400028, Romania.,Academy of Romanian Scientists, Bucharest 050094, Romania
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104
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Synthesis, characterization and in vitro biocompatibility study of strontium titanate ceramic: A potential biomaterial. J Mech Behav Biomed Mater 2020; 102:103494. [DOI: 10.1016/j.jmbbm.2019.103494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 10/13/2019] [Accepted: 10/13/2019] [Indexed: 12/20/2022]
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105
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Mayen L, Jensen ND, Laurencin D, Marsan O, Bonhomme C, Gervais C, Smith ME, Coelho C, Laurent G, Trebosc J, Gan Z, Chen K, Rey C, Combes C, Soulié J. A soft-chemistry approach to the synthesis of amorphous calcium ortho/pyrophosphate biomaterials of tunable composition. Acta Biomater 2020; 103:333-345. [PMID: 31881314 DOI: 10.1016/j.actbio.2019.12.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/15/2019] [Accepted: 12/19/2019] [Indexed: 12/27/2022]
Abstract
The development of amorphous phosphate-based materials is of major interest in the field of biomaterials science, and especially for bone substitution applications. In this context, we herein report the synthesis of gel-derived hydrated amorphous calcium/sodium ortho/pyrophosphate materials at ambient temperature and in water. For the first time, such materials have been obtained in a large range of tunable orthophosphate/pyrophosphate molar ratios. Multi-scale characterization was carried out thanks to various techniques, including advanced multinuclear solid state NMR. It allowed the quantification of each ionic/molecular species leading to a general formula for these materials: [(Ca2+y Na+z H+3+x-2y-z)(PO43-)1-x(P2O74-)x](H2O)u. Beyond this formula, the analyses suggest that these amorphous solids are formed by the aggregation of colloids and that surface water and sodium could play a role in the cohesion of the whole material. Although the full comprehension of mechanisms of formation and structure is still to be investigated in detail, the straightforward synthesis of these new amorphous materials opens up many perspectives in the field of materials for bone substitution and regeneration. STATEMENT OF SIGNIFICANCE: The metastability of amorphous phosphate-based materials with various chain length often improves their (bio)chemical reactivity. However, the control of the ratio of the different phosphate entities has not been yet described especially for small ions (pyrophosphate/orthophosphate) and using soft chemistry, whereas it opens the way for the tuning of enzyme- and/or pH-driven degradation and biological properties. Our study focuses on elaboration of amorphous gel-derived hydrated calcium/sodium ortho/pyrophosphate solids at 70 °C with a large range of orthophosphate/pyrophosphate ratios. Multi-scale characterization was carried out using various techniques such as advanced multinuclear SSNMR (31P, 23Na, 1H, 43Ca). Analyses suggest that these solids are formed by colloids aggregation and that the location of mobile water and sodium could play a role in the material cohesion.
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Affiliation(s)
- Laëtitia Mayen
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France
| | - Nicholai D Jensen
- ICGM, CNRS-UM-ENSCM, Université de Montpellier, Montpellier, France; Sorbonne Université, CNRS, LCMCP, Paris, France
| | | | - Olivier Marsan
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France
| | | | | | - Mark E Smith
- Department of Chemistry, Lancaster University, Lancaster, UK
| | | | | | - Julien Trebosc
- Université de Lille, UMR 8181, UCCS: Unit of Catalysis and Chemistry of Solids, Lille, France
| | - Zhehong Gan
- National High Magnetic Field Laboratory, Tallahassee, FL, USA
| | - Kuizhi Chen
- National High Magnetic Field Laboratory, Tallahassee, FL, USA
| | - Christian Rey
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France
| | - Christèle Combes
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France
| | - Jérémy Soulié
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France.
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106
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Zhang S, Zheng X, Wang P, Zhang D. Fabrication of super-hydrophobic micro-needle ZnO surface as corrosion barrier against corrosion in simulated condensation environment. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124087] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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107
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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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108
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Strutynska N, Livitska O, Vovchenko L, Zhuravkov A, Prylutskyy Y, Slobodyanik N. Novel Nanostructured Na
+
, Cu
2+
(Zn
2+
),CO
3
2−
‐HAP/Alginate Composite Scaffold: Fabrication, Characterization and Mechanical Properties. ChemistrySelect 2019. [DOI: 10.1002/slct.201902034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nataliia Strutynska
- Taras Shevchenko National University of KyivChemistry Department, 64/13 Volodymyrska Str. 01601 Kyiv Ukraine
| | - Oksana Livitska
- Taras Shevchenko National University of KyivChemistry Department, 64/13 Volodymyrska Str. 01601 Kyiv Ukraine
| | - Lyudmyla Vovchenko
- Taras Shevchenko National University of KyivChemistry Department, 64/13 Volodymyrska Str. 01601 Kyiv Ukraine
| | - Alexander Zhuravkov
- Taras Shevchenko National University of KyivChemistry Department, 64/13 Volodymyrska Str. 01601 Kyiv Ukraine
| | - Yuriy Prylutskyy
- Taras Shevchenko National University of KyivChemistry Department, 64/13 Volodymyrska Str. 01601 Kyiv Ukraine
| | - Nikolai Slobodyanik
- Taras Shevchenko National University of KyivChemistry Department, 64/13 Volodymyrska Str. 01601 Kyiv Ukraine
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109
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Du Y, Guo JL, Wang J, Mikos AG, Zhang S. Hierarchically designed bone scaffolds: From internal cues to external stimuli. Biomaterials 2019; 218:119334. [PMID: 31306826 PMCID: PMC6663598 DOI: 10.1016/j.biomaterials.2019.119334] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/19/2019] [Accepted: 07/03/2019] [Indexed: 02/07/2023]
Abstract
Bone tissue engineering utilizes three critical elements - cells, scaffolds, and bioactive factors - to recapitulate the bone tissue microenvironment, inducing the formation of new bone. Recent advances in materials development have enabled the production of scaffolds that more effectively mimic the hierarchical features of bone matrix, ranging from molecular composition to nano/micro-scale biochemical and physical features. This review summarizes recent advances within the field in utilizing these features of native bone to guide the hierarchical design of materials and scaffolds. Biomimetic strategies discussed in this review cover several levels of hierarchical design, including the development of element-doped compositions of bioceramics, the usage of molecular templates for in vitro biomineralization at the nanoscale, the fabrication of biomimetic scaffold architecture at the micro- and nanoscale, and the application of external physical stimuli at the macroscale to regulate bone growth. Developments at each level are discussed with an emphasis on their in vitro and in vivo outcomes in promoting osteogenic tissue development. Ultimately, these hierarchically designed scaffolds can complement or even replace the usage of cells and biological elements, which present clinical and regulatory barriers to translation. As the field progresses ever closer to clinical translation, the creation of viable therapies will thus benefit from further development of hierarchically designed materials and scaffolds.
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Affiliation(s)
- Yingying Du
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan 430074, PR China; Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Jason L Guo
- Department of Bioengineering, Rice University, P.O. Box 1892, MS-142, Houston, TX 77251-1892, USA
| | - Jianglin Wang
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan 430074, PR China; Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Antonios G Mikos
- Department of Bioengineering, Rice University, P.O. Box 1892, MS-142, Houston, TX 77251-1892, USA.
| | - Shengmin Zhang
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan 430074, PR China; Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
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110
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Melnik EV, Shkarina SN, Ivlev SI, Weinhardt V, Baumbach T, Chaikina MV, Surmeneva MA, Surmenev RA. In vitro degradation behaviour of hybrid electrospun scaffolds of polycaprolactone and strontium-containing hydroxyapatite microparticles. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.06.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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111
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Dias FJ, Arias A, Borie E, Fuentes R. Platelet-rich fibrin and collagen membrane in the preservation of the alveolar bone: Feasibility of the elemental inorganic composition and scanning electron microscopy analysis. Microsc Res Tech 2019; 82:1993-1999. [PMID: 31441994 DOI: 10.1002/jemt.23368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 07/05/2019] [Accepted: 08/06/2019] [Indexed: 12/13/2022]
Abstract
The success of dental implants is related to the amount, quality, and composition of the alveolar bone. The placement of platelet-rich fibrin (PRF) clot associated with a resorbable collagen membrane (RCM) in a postextraction alveolus is a technique used for ridge preservation. This case report study analyzed the ultrastructural characteristics of cross-sectioned alveolar bone that received PRF and RCM using scanning electron microscopy and the inorganic composition using "energy dispersive X-ray spectrometry," in order to explore the feasibility of this method to clinical studies. Three alveolar bone samples from two male patients (37 and 58 years old), obtained in the procedure of placing the dental implant, were analyzed. Two bone samples previously received PRF and RCM (M37 and M58), the third sample represented a physiological bone formation without treatment (M37-control). The bone sample M37 showed irregularly shaped islets of calcified material intermingled with connective tissue. The other samples, from the 58-year-old patient with PRF and RCM (M58); and the other untreated bone sample from the same 37-year-old patient (M37-control) showed similar ultrastructural morphology with trabecular conformation without islets agglomerations. The inorganic composition analysis showed higher concentrations of calcium and phosphorus in both samples treated with PRF and RCM in comparison to the untreated bone sample. The Ca/P ratio was higher in the M37 sample compared to the others samples. The results showed morphology and inorganic composition differences among the treatments used, suggesting that this method is feasible to analyze parameters of the alveolar bone tissue.
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Affiliation(s)
- Fernando José Dias
- Department of Integral Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile.,Research Centre for Dental Sciences CICO, Dental School, Universidad de La Frontera, Temuco, Chile
| | - Alain Arias
- Department of Integral Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile.,Research Centre for Dental Sciences CICO, Dental School, Universidad de La Frontera, Temuco, Chile.,Universidad Adventista de Chile, Chillán, Chile
| | - Eduardo Borie
- Department of Integral Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile.,Research Centre for Dental Sciences CICO, Dental School, Universidad de La Frontera, Temuco, Chile
| | - Ramón Fuentes
- Department of Integral Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile.,Research Centre for Dental Sciences CICO, Dental School, Universidad de La Frontera, Temuco, Chile
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112
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Dual Doping of Silicon and Manganese in Hydroxyapatites: Physicochemical Properties and Preliminary Biological Studies. MATERIALS 2019; 12:ma12162566. [PMID: 31408945 PMCID: PMC6721101 DOI: 10.3390/ma12162566] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 08/08/2019] [Accepted: 08/09/2019] [Indexed: 11/18/2022]
Abstract
Silicated hydroxyapatite powders enriched with small amounts of manganese (Mn2+) cations were synthesized via two different methods: precipitation in aqueous solution and the solid-state method. The source of Mn2+ ions was manganese acetate, while silicon was incorporated using two different reagents: silicon acetate and sodium metasilicate. Powder X-ray diffraction (PXRD) analysis showed that the powders obtained via the precipitation method consisted of single-phase nanocrystalline hydroxyapatite. In contrast, samples obtained via the solid-state method were heterogenous and contaminated with other phases, (i.e., calcium oxide, calcium hydroxide, and silicocarnotite) arising during thermal treatment. The transmission electron microscope (TEM) images showed powders obtained via the precipitation method were nanosized and elongated, while solid-state synthesis produced spherical microcrystals. The phase identification was complemented by Fourier transform infrared spectroscopy (FTIR). An in-depth analysis via solid-state nuclear magnetic resonance (ssNMR) was carried out, using phosphorus 31P single-pulse Bloch decay (BD) (31P BD) and cross-polarization (CP) experiments from protons to silicon-29 nuclei (1H → 29Si CP). The elemental measurements carried out using wavelength-dispersive X-ray fluorescence (WD-XRF) showed that the efficiency of introducing manganese and silicon ions was between 45% and 95%, depending on the synthesis method and the reagents. Preliminary biological tests on the bacteria Allivibrio fisheri (Microtox®) and the protozoan Spirostomum ambiguum (Spirotox) showed no toxic effect in any of the samples. The obtained materials may find potential application in regenerative medicine, bone implantology, and orthopedics as bone substitutes or implant coatings.
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113
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Ul Hassan M, Iqbal S, Yun JI, Ryu HJ. Immobilization of radioactive corrosion products by cold sintering of pure hydroxyapatite. JOURNAL OF HAZARDOUS MATERIALS 2019; 374:228-237. [PMID: 31005705 DOI: 10.1016/j.jhazmat.2019.04.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 04/02/2019] [Accepted: 04/10/2019] [Indexed: 06/09/2023]
Abstract
An efficient method for the consolidation of cobalt (Co(II)) adsorbed calcium hydroxyapatite was investigated to develop a simplified route for decontamination of the coolant system of nuclear power plants and direct immobilization of as-spent adsorbent. Calcium hydroxyapatite nano-powder synthesized by a wet precipitation method was used as an adsorbent and 94% Co(II) surrogate removal from simulated water was measured. The as-spent adsorbent was sintered at 200 °C, a temperature significantly lower than conventional sintering temperatures (900-1300 °C) for hydroxyapatite, under a uniaxial pressure of 500 MPa for 10 min. The relative density after the cold sintering was >97% and sintered samples displayed good compressive strength (175 MPa). The normalized leaching rate of the Co(II) was measured as per ASTM-C1285 standard and found to be 2.5 × 10-5 g/m2/day. ANSI/ANS-16.1 test procedure was used to analyze the leachability of the sintered matrices and the measured leaching index value was 6.5. Thus, the use of pure calcium hydroxyapatite nano-powder as adsorbent and its cold sintering offers a mean by which radioactive waste form can be processed in an environment friendly manner.
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Affiliation(s)
- Muhmood Ul Hassan
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon, 34141, Republic of Korea
| | - Sajid Iqbal
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon, 34141, Republic of Korea; Chemistry Division, Pakistan Institute of Nuclear Science and Technology, P.O. Nilore, Islamabad, Pakistan
| | - Jong-Il Yun
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon, 34141, Republic of Korea.
| | - Ho Jin Ryu
- Department of Nuclear and Quantum Engineering, KAIST, Daejeon, 34141, Republic of Korea.
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114
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Functionalization of Hydroxyapatite Ceramics: Raman Mapping Investigation of Silanization. CERAMICS-SWITZERLAND 2019. [DOI: 10.3390/ceramics2020029] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Surface modification of bioceramic materials by covalent immobilization of biomolecules is a promising way to improve their bioactivity. This approach implies the use of organic anchors to introduce functional groups on the inorganic surface on which the biomolecules will be immobilized. In this process, the density and surface distribution of biomolecules, and in turn the final biological properties, are strongly influenced by those of the anchors. We propose a new approach based on Raman 2D mapping to evidence the surface distribution of organosilanes, frequently used as anchors on biomaterial surfaces on hydroxyapatite and silicated hydroxyapatite ceramics. Unmodified and silanized ceramic surfaces were characterized by means of contact angle measurements, atomic force microscopy (AFM) and Raman mapping. Contact angle measurements and AFM topographies confirmed the surface modification. Raman mapping highlighted the influence of both the ceramic’s composition and silane functionality (i.e., the number of hydrolysable groups) on the silane surface distribution. The presence of hillocks was shown, evidencing a polymerization and/or an aggregation of the molecules whatever the silane and the substrates were. The substitution of phosphate groups by silicate groups affects the covering, and the spots are more intense on SiHA than on HA.
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Li K, Dai F, Yan T, Xue Y, Zhang L, Han Y. Magnetic Silicium Hydroxyapatite Nanorods for Enhancing Osteoblast Response in Vitro and Biointegration in Vivo. ACS Biomater Sci Eng 2019; 5:2208-2221. [PMID: 33405773 DOI: 10.1021/acsbiomaterials.9b00073] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Osteoblast behavior playing an important role in the biointegration of the Ti implant with host bone in vivo can be regulated by surface properties and magnetic field. In order to endow the Ti surface with good osteogenesis activity, Si monosubstituted and Fe and Si cosubstituted hydroxyapatite (HAp) nanorods were fabricated on microporous TiO2 by microarc oxidation (MAO) followed with hydrothermal treatment (HT). The surface properties including microstructure, microroughness, hydrophilicity, ion release, magnetic property, cytocompatibility, and biointegration of substituted HAp nanorods were observed and evaluated, together with pure HAp nanorods and microarc oxidated (MAOed) TiO2 as controls. After being doped with Fe, MAOed TiO2 has no changes in phase composition and microroughness, whereas it displays weakly ferromagnetic behavior and can enhance osteoblast differentiation in vitro and formation of new bone in vivo, compared with the undoped one. The substituted HAp nanorods adhere firmly to TiO2 and have almost the same wettability and microroughness but additional Si, Fe, and/or Ca released into the medium, compared with pure HAp nanorods. Moreover, the cosubstituted HAp has a small ferromagnetic signal, while its saturation magnetization value is less than that of the MAOed doped with Fe. Compared to pure HA nanorods, the substituted HAp nanorods not only improve cell proliferation and differentiation in vitro, but also enhance the ability of bone integration in vivo, especially for the cosubstituted one, which should be ascribed to the combined effect of microstructure, magnetic property, and released ions.
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Affiliation(s)
- Kai Li
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, P. R. China
| | - Fang Dai
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, P. R. China
| | - Ting Yan
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, P. R. China
| | - Yang Xue
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, P. R. China
| | - Lan Zhang
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, P. R. China
| | - Yong Han
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, P. R. China
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Surmenev RA, Shkarina S, Syromotina DS, Melnik EV, Shkarin R, Selezneva II, Ermakov AM, Ivlev SI, Cecilia A, Weinhardt V, Baumbach T, Rijavec T, Lapanje A, Chaikina MV, Surmeneva MA. Characterization of biomimetic silicate- and strontium-containing hydroxyapatite microparticles embedded in biodegradable electrospun polycaprolactone scaffolds for bone regeneration. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.01.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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117
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Xiao H, Huang W, Xiong K, Ruan S, Yuan C, Mo G, Tian R, Zhou S, She R, Ye P, Liu B, Deng J. Osteochondral repair using scaffolds with gradient pore sizes constructed with silk fibroin, chitosan, and nano-hydroxyapatite. Int J Nanomedicine 2019; 14:2011-2027. [PMID: 30962685 PMCID: PMC6435123 DOI: 10.2147/ijn.s191627] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background One of the main problems associated with the development of osteochondral reparative materials is that the accurate imitation of the structure of the natural osteochondral tissue and fabrication of a suitable scaffold material for osteochondral repair are difficult. The long-term outcomes of single- or bilayered scaffolds are often unsatisfactory because of the absence of a progressive osteochondral structure. Therefore, only scaffolds with gradient pore sizes are suitable for osteochondral repair to achieve better proliferation and differentiation of the stem cells into osteochondral tissues to complete the repair of defects. Methods A silk fibroin (SF) solution, chitosan (CS) solution, and nano-hydroxyapatite (nHA) suspension were mixed at the same weight fraction to obtain osteochondral scaffolds with gradient pore diameters by centrifugation, freeze-drying, and chemical cross-linking. Results The scaffolds prepared in this study are confirmed to have a progressive structure starting from the cartilage layer to bone layer, similar to that of the normal osteochondral tissues. The prepared scaffolds are cylindrical in shape and have high internal porosity. The structure consists of regular and highly interconnected pores with a progressively increasing pore distribution as well as a progressively changing pore diameter. The scaffold strongly absorbs water, and has a suitable degradation rate, sufficient space for cell growth and proliferation, and good resistance to compression. Thus, the scaffold can provide sufficient nutrients and space for cell growth, proliferation, and migration. Further, bone marrow mesenchymal stem cells seeded onto the scaffold closely attach to the scaffold and stably grow and proliferate, indicating that the scaffold has good biocompatibility with no cytotoxicity. Conclusion In brief, the physical properties and biocompatibility of our scaffolds fully comply with the requirements of scaffold materials required for osteochondral tissue engineering, and they are expected to become a new type of scaffolds with gradient pore sizes for osteochondral repair.
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Affiliation(s)
- Hongli Xiao
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
| | - Wenliang Huang
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
| | - Kun Xiong
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
| | - Shiqiang Ruan
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
| | - Cheng Yuan
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
| | - Gang Mo
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
| | - Renyuan Tian
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
| | - Sirui Zhou
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
| | - Rongfeng She
- Department of Orthopedics, Guizhou Province People's Hospital, Guiyang 550002, Guizhou Province, People's Republic of China
| | - Peng Ye
- Emergency and Trauma Ward, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China
| | - Bin Liu
- Surgical Laboratory, Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China
| | - Jiang Deng
- Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, People's Republic of China,
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Martínez-Sanmiguel JJ, G Zarate-Triviño D, Hernandez-Delgadillo R, Giraldo-Betancur AL, Pineda-Aguilar N, Galindo-Rodríguez SA, Franco-Molina MA, Hernández-Martínez SP, Rodríguez-Padilla C. Anti-inflammatory and antimicrobial activity of bioactive hydroxyapatite/silver nanocomposites. J Biomater Appl 2019; 33:1314-1326. [PMID: 30880564 DOI: 10.1177/0885328219835995] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Biomaterials are often used in orthopedic surgery like cavity fillings. However, related complications often require long-term systemic antibiotics, device removal, and extended rehabilitation. Hydroxyapatite/silver (HA/Ag) composites have been proposed as implantation biomaterials owing to the osteogenic properties of hydroxyapatite and to the antimicrobial efficiency of silver. Nevertheless, higher silver concentrations induce cytotoxic effects. The aim of this study was to synthesize and characterize HA/Ag nanocomposites that will allow us to use lower concentrations of silver nanoparticles with better antimicrobial efficiency and anti-inflammatory properties. The characterization of HA/Ag was performed by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Fourier-transform infrared spectra, X-ray photoelectron spectroscopy, and laser diffraction. Bioactivity was evaluated under a simulated body fluid. The viability of osteoblast like-cells (MG-63) was determined by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide) and the antimicrobial activity was evaluated by the standard McFarland method. The detection of nitric oxide was measured by a colorimetric assay and the inflammatory cytokines by flow cytometry. We obtained particulate composites of calcium phosphates identified as hydroxyapatite and silver nanoparticles. The bioactivity of the HA/Ag nanocomposites on SFB was confirmed by apatite formations. The viability of MG-63 cells was not affected. We also found antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans owing to the presence of silver nanoparticles at non-cytotoxic concentrations. HA/Ag reduced the release of nitric oxide and decreased the secretion of IL-1 and TNF-α in cells stimulated with Lipopolysaccharide (LPS). In conclusion, the inflammatory and antimicrobial capacity of the HA/Ag nanocomposites, as well as its bioactivity and low cytotoxicity make it a candidate as an implantation biomaterial for bone tissues engineering and clinical practices in orthopedic, oral and maxillofacial surgery.
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Affiliation(s)
| | - Diana G Zarate-Triviño
- 1 Facultad de Ciencias Biológicas. Universidad Autónoma de Nuevo León. Nuevo León, México
| | | | - Astrid L Giraldo-Betancur
- 3 CONACYT - Centro de Investigación y de Estudios Avanzados del IPN, Lib. Norponiente, Fracc. Real de Juriquilla, Querétaro, Qro., México
| | - Nayely Pineda-Aguilar
- 4 Centro de Investigación en Materiales Avanzados, CIMAV Unidad Monterrey. Nuevo León, México
| | | | - Moisés A Franco-Molina
- 1 Facultad de Ciencias Biológicas. Universidad Autónoma de Nuevo León. Nuevo León, México
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119
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Radha G, Venkatesan B, Rajashree P, Vellaichamy E, Balakumar S. Insights into the apatite mineralization potential of thermally processed nanocrystalline Ca10−xFex(PO4)6(OH)2. NEW J CHEM 2019. [DOI: 10.1039/c8nj03579b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermal treatment of Ca10−xFex(PO4)6(OH)2 at different temperatures had an effect on the mineralization potential under non-cellular and cellular conditions by releasing its bioactive ions at optimal or excessive levels.
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Affiliation(s)
- G. Radha
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai – 600025
- India
| | | | - P. Rajashree
- Centre for Advanced Study in Crystallography and Biophysics
- University of Madras
- Chennai – 600025
- India
| | | | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai – 600025
- India
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120
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Gu X, Lin W, Li D, Guo H, Li P, Fan Y. Degradation and biocompatibility of a series of strontium substituted hydroxyapatite coatings on magnesium alloys. RSC Adv 2019; 9:15013-15021. [PMID: 35516316 PMCID: PMC9064257 DOI: 10.1039/c9ra02210d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 05/04/2019] [Indexed: 01/28/2023] Open
Abstract
Sr-HA coatings could simply improve the degradation and osteoblast response of Mg in a Sr-dose dependent manner.
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Affiliation(s)
- Xuenan Gu
- School of Biological Science and Medical Engineering
- Beihang University
- Beijing 100191
- China
- Beijing Advanced Innovation Centre for Biomedical Engineering
| | - Wenting Lin
- School of Biological Science and Medical Engineering
- Beihang University
- Beijing 100191
- China
| | - Dan Li
- School of Biological Science and Medical Engineering
- Beihang University
- Beijing 100191
- China
| | - Hongmei Guo
- School of Biological Science and Medical Engineering
- Beihang University
- Beijing 100191
- China
| | - Ping Li
- School of Biological Science and Medical Engineering
- Beihang University
- Beijing 100191
- China
- Beijing Advanced Innovation Centre for Biomedical Engineering
| | - Yubo Fan
- School of Biological Science and Medical Engineering
- Beihang University
- Beijing 100191
- China
- Beijing Advanced Innovation Centre for Biomedical Engineering
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121
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Li Y, Li B, Song Y, Ma A, Li C, Zhang X, Li H, Zhang Q, Zhang K. Improved osteoblast adhesion and osseointegration on TiO 2 nanotubes surface with hydroxyapatite coating. Dent Mater J 2018; 38:278-286. [PMID: 30541994 DOI: 10.4012/dmj.2018-118] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To improve initial osteoblast adhesion and subsequent osseointegration, TiO2 nanotubes layer was constructed on the titanium (Ti) surface by anodic oxidation (AO), with an additional hydroxyapatite (HA) coating to form the AO/HA surface. Tests on in vitro cellular activity displayed that the AO surface, especially the AO/HA surface, promoted initial adhesion, proliferation and differentiation of osteoblast cells. The modified AO and AO/HA surfaces further presented an up-regulated gene expression of osteogenic and adhesion markers collagen type 1 (COL), osteopontin (OPN), osteocalcin (OCN) and vinculin. In addition, in vivo experiments with a rat model demonstrated that the AO surface, particularly the AO/HA surface, achieved earlier osseointegration and a superior bone bonding ability compared with Ti. Our study shed light on a synergistic role played by nanotopography and HA in promoting osteoblast adhesion, proliferation, differentiation and osseointegration, thus suggesting a promising method for better modifying the implant surface.
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Affiliation(s)
- Ying Li
- Stomatological Hospital, Tianjin Medical University
| | - Baoe Li
- School of Materials Science and Engineering, Hebei University of Technology
| | - Yunjia Song
- Stomatological Hospital, Tianjin Medical University
| | - Aobo Ma
- Stomatological Hospital, Tianjin Medical University
| | - Changyi Li
- Stomatological Hospital, Tianjin Medical University
| | - Xu Zhang
- Stomatological Hospital, Tianjin Medical University
| | - Hongjie Li
- Stomatological Hospital, Tianjin Medical University
| | - Qian Zhang
- Stomatological Hospital, Tianjin Medical University
| | - Kai Zhang
- Stomatological Hospital, Tianjin Medical University
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122
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Xu JZ, Ren Y, Yin HM, Huang YF, Liu W, Zhao B, Gul RM, Li ZM. Bone-like Polymeric Composites with a Combination of Bioactive Glass and Hydroxyapatite: Simultaneous Enhancement of Mechanical Performance and Bioactivity. ACS Biomater Sci Eng 2018; 4:4434-4442. [PMID: 33418836 DOI: 10.1021/acsbiomaterials.8b01174] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An ideal bone substitute requires not only high bioactivity but also sufficient mechanical performance, which is however inaccessible due to the lack of rational structure and composition design. Here, bioactive glass (BG)/hydroxyapatite (HA)/polyethylene (PE) composites with bone-like structure were prepared via a structuring injection molding. The strong and reciprocating shear field offered by the modified injection molding induced plenty of interlocked shish kebabs, mimicking the aligned collagen fibers in the natural bone. Such a bone-like structure enhanced the strength and toughness of the BG/HA/PE composites simultaneously, compensating the mechanical loss caused by the presence of BG. In vitro cell culture assays demonstrated that the combination of BG and HA significantly promoted cell attachment, proliferation, and alkaline phosphatase activity compared to the use of HA alone. It was attributed to upregulated expression of β-catenin stimulated by BG. The mineralization in simulated body fluid revealed that the BG/HA/PE composite exhibited apatite-forming ability stronger than that of the HA/PE counterpart. The integration of excellent mechanical performance and high bioactivity demonstrated the significant potential of the structured BG/HA/PE composites as load-bearing bone substitutes.
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Affiliation(s)
- Jia-Zhuang Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065 Chengdu, China
| | - Yue Ren
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065 Chengdu, China
| | - Hua-Mo Yin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065 Chengdu, China
| | - Yan-Fei Huang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065 Chengdu, China
| | - Wei Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065 Chengdu, China
| | - Baisong Zhao
- Department of Anesthesiology, Guangzhou Women and Children's Medical Centre, Guangzhou Medical University, 510623 Guangzhou, China
| | - Rizwan M Gul
- Department of Mechanical Engineering, University of Engineering and Technology, 25120 Peshawar, Pakistan
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065 Chengdu, China
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Chahkandi M, Arami SRS, Mirzaei M, Mahdavi B, Hosseini-Tabar SM. A new effective nano-adsorbent and antibacterial material of hydroxyapatite. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s13738-018-1546-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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124
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Tite T, Popa AC, Balescu LM, Bogdan IM, Pasuk I, Ferreira JMF, Stan GE. Cationic Substitutions in Hydroxyapatite: Current Status of the Derived Biofunctional Effects and Their In Vitro Interrogation Methods. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E2081. [PMID: 30355975 PMCID: PMC6266948 DOI: 10.3390/ma11112081] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/13/2018] [Accepted: 10/19/2018] [Indexed: 12/13/2022]
Abstract
High-performance bioceramics are required for preventing failure and prolonging the life-time of bone grafting scaffolds and osseous implants. The proper identification and development of materials with extended functionalities addressing socio-economic needs and health problems constitute important and critical steps at the heart of clinical research. Recent findings in the realm of ion-substituted hydroxyapatite (HA) could pave the road towards significant developments in biomedicine, with an emphasis on a new generation of orthopaedic and dentistry applications, since such bioceramics are able to mimic the structural, compositional and mechanical properties of the bone mineral phase. In fact, the fascinating ability of the HA crystalline lattice to allow for the substitution of calcium ions with a plethora of cationic species has been widely explored in the recent period, with consequent modifications of its physical and chemical features, as well as its functional mechanical and in vitro and in vivo biological performance. A comprehensive inventory of the progresses achieved so far is both opportune and of paramount importance, in order to not only gather and summarize information, but to also allow fellow researchers to compare with ease and filter the best solutions for the cation substitution of HA-based materials and enable the development of multi-functional biomedical designs. The review surveys preparation and synthesis methods, pinpoints all the explored cation dopants, and discloses the full application range of substituted HA. Special attention is dedicated to the antimicrobial efficiency spectrum and cytotoxic trade-off concentration values for various cell lines, highlighting new prophylactic routes for the prevention of implant failure. Importantly, the current in vitro biological tests (widely employed to unveil the biological performance of HA-based materials), and their ability to mimic the in vivo biological interactions, are also critically assessed. Future perspectives are discussed, and a series of recommendations are underlined.
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Affiliation(s)
- Teddy Tite
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
| | - Adrian-Claudiu Popa
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
- Army Centre for Medical Research, RO-010195 Bucharest, Romania.
| | | | | | - Iuliana Pasuk
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
| | - José M F Ferreira
- Department of Materials and Ceramics Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - George E Stan
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
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125
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Sangeetha R, Madheswari D, Priya G. Fabrication of poly (methyl methacrylate)/Ce/Cu substituted apatite/Egg white (Ovalbumin) biocomposite owning adjustable properties: Towards bone tissue rejuvenation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 187:162-169. [DOI: 10.1016/j.jphotobiol.2018.08.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/10/2018] [Accepted: 08/13/2018] [Indexed: 01/25/2023]
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126
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Trigos JBR, Jiménez-Flores Y, Suárez V, Suárez-Quezada M, Nogal U. Sol-Gel Synthesis of Calcium-Deficient Hydroxyapatite: Influence of the pH Behavior during Synthesis on the Structural, Chemical Composition and Physical Properties. POWDER TECHNOL 2018. [DOI: 10.5772/intechopen.76531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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127
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Neto AS, Ferreira JMF. Synthetic and Marine-Derived Porous Scaffolds for Bone Tissue Engineering. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1702. [PMID: 30216991 PMCID: PMC6165145 DOI: 10.3390/ma11091702] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 07/27/2018] [Accepted: 08/10/2018] [Indexed: 12/19/2022]
Abstract
Bone is a vascularized and connective tissue. The cortical bone is the main part responsible for the support and protection of the remaining systems and organs of the body. The trabecular spongy bone serves as the storage of ions and bone marrow. As a dynamic tissue, bone is in a constant remodelling process to adapt to the mechanical demands and to repair small lesions that may occur. Nevertheless, due to the increased incidence of bone disorders, the need for bone grafts has been growing over the past decades and the development of an ideal bone graft with optimal properties remains a clinical challenge. This review addresses the bone properties (morphology, composition, and their repair and regeneration capacity) and puts the focus on the potential strategies for developing bone repair and regeneration materials. It describes the requirements for designing a suitable scaffold material, types of materials (polymers, ceramics, and composites), and techniques to obtain the porous structures (additive manufacturing techniques like robocasting or derived from marine skeletons) for bone tissue engineering applications. Overall, the main objective of this review is to gather the knowledge on the materials and methods used for the production of scaffolds for bone tissue engineering and to highlight the potential of natural porous structures such as marine skeletons as promising alternative bone graft substitute materials without any further mineralogical changes, or after partial or total transformation into calcium phosphate.
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Affiliation(s)
- Ana S Neto
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - José M F Ferreira
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
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128
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Autologous Bone Is Inferior to Alloplastic Cranioplasties: Safety of Autograft and Allograft Materials for Cranioplasties, a Systematic Review. World Neurosurg 2018; 117:443-452.e8. [DOI: 10.1016/j.wneu.2018.05.193] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/25/2018] [Accepted: 05/26/2018] [Indexed: 11/19/2022]
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129
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Winkler T, Sass FA, Duda GN, Schmidt-Bleek K. A review of biomaterials in bone defect healing, remaining shortcomings and future opportunities for bone tissue engineering: The unsolved challenge. Bone Joint Res 2018; 7:232-243. [PMID: 29922441 PMCID: PMC5987690 DOI: 10.1302/2046-3758.73.bjr-2017-0270.r1] [Citation(s) in RCA: 226] [Impact Index Per Article: 37.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Despite its intrinsic ability to regenerate form and function after injury, bone tissue can be challenged by a multitude of pathological conditions. While innovative approaches have helped to unravel the cascades of bone healing, this knowledge has so far not improved the clinical outcomes of bone defect treatment. Recent findings have allowed us to gain in-depth knowledge about the physiological conditions and biological principles of bone regeneration. Now it is time to transfer the lessons learned from bone healing to the challenging scenarios in defects and employ innovative technologies to enable biomaterial-based strategies for bone defect healing. This review aims to provide an overview on endogenous cascades of bone material formation and how these are transferred to new perspectives in biomaterial-driven approaches in bone regeneration. Cite this article: T. Winkler, F. A. Sass, G. N. Duda, K. Schmidt-Bleek. A review of biomaterials in bone defect healing, remaining shortcomings and future opportunities for bone tissue engineering: The unsolved challenge. Bone Joint Res 2018;7:232–243. DOI: 10.1302/2046-3758.73.BJR-2017-0270.R1.
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Affiliation(s)
- T Winkler
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin and Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
| | - F A Sass
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin and Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
| | - G N Duda
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin and Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
| | - K Schmidt-Bleek
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin and Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
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130
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Lavanya P, Vijayakumari N. Fabrication of Poly (d, l - Alanine)/minerals substituted hydroxyapatite bio-composite for bone tissue applications. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.md.2018.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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131
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Köse S, Kankilic B, Gizer M, Ciftci Dede E, Bayramli E, Korkusuz P, Korkusuz F. Stem Cell and Advanced Nano Bioceramic Interactions. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:317-342. [PMID: 30357696 DOI: 10.1007/978-981-13-0947-2_17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Bioceramics are type of biomaterials generally used for orthopaedic applications due to their similar structure with bone. Especially regarding to their osteoinductivity and osteoconductivity, they are used as biodegradable scaffolds for bone regeneration along with mesenchymal stem cells. Since chemical properties of bioceramics are important for regeneration of tissue, physical properties are also important for cell proliferation. In this respect, several different manufacturing methods are used for manufacturing nano scale bioceramics. These nano scale bioceramics are used for regeneration of bone and cartilage both alone or with other types of biomaterials. They can also act as carrier for the delivery of drugs in musculoskeletal infections without causing any systemic toxicity.
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Affiliation(s)
- Sevil Köse
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Atilim University, Ankara, Turkey.
| | - Berna Kankilic
- Head of Certification, Directorate of Directives, Turkish Standards Institution, Ankara, Turkey
| | - Merve Gizer
- Department of Bioengineering, Hacettepe University, Ankara, Turkey
| | - Eda Ciftci Dede
- Department of Bioengineering, Hacettepe University, Ankara, Turkey
| | - Erdal Bayramli
- Department of Chemistry, Middle East Technical University, Ankara, Turkey
| | - Petek Korkusuz
- Department of Histology and Embryology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Feza Korkusuz
- Department of Sports Medicine, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Park SY, Madhurakkat Perikamana SK, Park JH, Kim SW, Shin H, Park SP, Jung HS. Osteoinductive superparamagnetic Fe nanocrystal/calcium phosphate heterostructured microspheres. NANOSCALE 2017; 9:19145-19153. [PMID: 29185575 DOI: 10.1039/c7nr06777a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Functional magnetic and biocompatible particles are of great interest because of their potential use in various bioapplications such as hyperthermia for cancer treatment, magnetic resonance imaging (MRI) contrast agents and drug delivery. Herein, we introduce a facile method for synthesizing magnetic Fe nanocrystal/Fe-substituted calcium phosphate (Fe/FeCaP) heterostructured microspheres using a two-step procedure: (1) one-pot hydrothermal synthesis to prepare uniform-sized FeCaP microspheres and (2) post-reduction annealing at 600 °C for Fe extraction from FeCaP. This approach results in the fabrication of Fe/FeCaP heterostructured microspheres that exhibit superparamagnetism with a saturation magnetization of 10.77 emu g-1. The Fe/FeCaP particles annealed at 600 °C show a much higher magnetic moment compared with the non-annealed FeCaP particles. Moreover, T2-weighted MRI phantom images reveal that the Fe/FeCaP heterostructured microspheres possess higher relaxivity than paramagnetic FeCaP, demonstrating their potential as superior and biocompatible MRI contrast agents. Moreover, the enhancement in osteoconductivity for Fe/FeCaP microspheres without any evidence of cytotoxicity was verified. Our results demonstrate the great potential of multi-functional Fe/FeCaP microspheres for use as biocompatible bone regeneration agents as well as MRI contrast agents.
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Affiliation(s)
- So Yeon Park
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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133
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Peet JR, Piovano A, Johnson MR, Evans IR. Location and orientation of lone pairs in apatite-type materials: a computational study. Dalton Trans 2017; 46:15996-15999. [PMID: 29106422 DOI: 10.1039/c7dt03956e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electron localisation function (ELF) calculations have been used to provide the first computational location of the cation lone pairs in apatite materials. We show that the orientation of the lone pairs varies depending on the identity and positions of the channel anions. The results represent a new platform for interpreting experimentally observed structure-property relationships in functional apatites. In particular, they have significant implications for ionic conductivity and suggest that structure-property relationships in lone-pair containing apatite-type solid electrolytes are more complex than previously thought.
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Affiliation(s)
- J R Peet
- Department of Chemistry, Durham University, Durham DH1 3LE, UK..
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134
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Laskus A, Kolmas J. Ionic Substitutions in Non-Apatitic Calcium Phosphates. Int J Mol Sci 2017; 18:E2542. [PMID: 29186932 PMCID: PMC5751145 DOI: 10.3390/ijms18122542] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 11/22/2017] [Accepted: 11/24/2017] [Indexed: 12/25/2022] Open
Abstract
Calcium phosphate materials (CaPs) are similar to inorganic part of human mineralized tissues (i.e., bone, enamel, and dentin). Owing to their high biocompatibility, CaPs, mainly hydroxyapatite (HA), have been investigated for their use in various medical applications. One of the most widely used ways to improve the biological and physicochemical properties of HA is ionic substitution with trace ions. Recent developments in bioceramics have already demonstrated that introducing foreign ions is also possible in other CaPs, such as tricalcium phosphates (amorphous as well as α and β crystalline forms) and brushite. The purpose of this paper is to review recent achievements in the field of non-apatitic CaPs substituted with various ions. Particular attention will be focused on tricalcium phosphates (TCP) and "additives" such as magnesium, zinc, strontium, and silicate ions, all of which have been widely investigated thanks to their important biological role. This review also highlights some of the potential biomedical applications of non-apatitic substituted CaPs.
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Affiliation(s)
- Aleksandra Laskus
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy with Laboratory Medicine Division, Medical University of Warsaw, ul. Banacha 1, 02-097 Warsaw, Poland.
| | - Joanna Kolmas
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy with Laboratory Medicine Division, Medical University of Warsaw, ul. Banacha 1, 02-097 Warsaw, Poland.
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135
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A A, Menon D, T B S, Koyakutty M, Mohan CC, Nair SV, Nair MB. Bioinspired Composite Matrix Containing Hydroxyapatite-Silica Core-Shell Nanorods for Bone Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2017; 9:26707-26718. [PMID: 28741921 DOI: 10.1021/acsami.7b07131] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Development of multifunctional bioinspired scaffolds that can stimulate vascularization and regeneration is necessary for the application in bone tissue engineering. Herein, we report a composite matrix containing hydroxyapatite (HA)-silica core-shell nanorods with good biocompatibility, osteogenic differentiation, vascularization, and bone regeneration potential. The biomaterial consists of a crystalline, rod-shaped nanoHA core with uniform amorphous silica sheath (Si-nHA) that retains the characteristic phases of the individual components, confirmed by high-resolution transmission electron microscopy, X-ray diffractometer, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The nanorods were blended with gelatinous matrix to develop as a porous, composite scaffold. The viability and functionality of osteogenically induced mesenchymal stem cells as well as endothelial cells have been significantly improved through the incorporation of Si-nHA within the matrix. Studies in the chicken chorioallantoic membrane and rat models demonstrated that the silica-containing scaffolds not only exhibit good biocompatibility, but also enhance vascularization in comparison to the matrix devoid of silica. Finally, when tested in a critical-sized femoral segmental defect in rats, the nanocomposite scaffolds enhanced new bone formation in par with the biomaterial degradation. In conclusion, the newly developed composite biomimetic scaffold may perform as a promising candidate for bone tissue engineering applications.
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Affiliation(s)
- Anitha A
- Center for Nanosciences and Molecular Medicine, Amrita University , Kochi, Kerala 682041, India
| | - Deepthy Menon
- Center for Nanosciences and Molecular Medicine, Amrita University , Kochi, Kerala 682041, India
| | - Sivanarayanan T B
- Center for Nanosciences and Molecular Medicine, Amrita University , Kochi, Kerala 682041, India
| | - Manzoor Koyakutty
- Center for Nanosciences and Molecular Medicine, Amrita University , Kochi, Kerala 682041, India
| | - Chandini C Mohan
- Center for Nanosciences and Molecular Medicine, Amrita University , Kochi, Kerala 682041, India
| | - Shantikumar V Nair
- Center for Nanosciences and Molecular Medicine, Amrita University , Kochi, Kerala 682041, India
| | - Manitha B Nair
- Center for Nanosciences and Molecular Medicine, Amrita University , Kochi, Kerala 682041, India
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136
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Neumeyer D, Venturini C, Ratel-Ramond N, Verelst M, Gourdon A. Simple and economic elaboration of high purity CaCO3 particles for bone graft applications using a spray pyrolysis technique. J Mater Chem B 2017; 5:6897-6907. [DOI: 10.1039/c7tb00586e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CaCO3 particles obtained using spray pyrolysis possess all the requirements to constitute promising multi-purpose materials for bone graft applications.
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Affiliation(s)
| | | | | | - Marc Verelst
- Université de Toulouse
- UPS
- 31055 Toulouse
- France
- ChromaLys S.A.S
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137
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Lim PN, Wang Z, Chang L, Konishi T, Choong C, Ho B, Thian ES. A multi-material coating containing chemically-modified apatites for combined enhanced bioactivity and reduced infection via a drop-on-demand micro-dispensing technique. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:3. [PMID: 27878735 DOI: 10.1007/s10856-016-5812-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Accepted: 11/08/2016] [Indexed: 06/06/2023]
Abstract
Prevention of infection and enhanced osseointegration are closely related, and required for a successful orthopaedic implant, which necessitate implant designs to consider both criteria in tandem. A multi-material coating containing 1:1 ratio of silicon-substituted hydroxyapatite and silver-substituted hydroxyapatite as the top functional layer, and hydroxyapatite as the base layer, was produced via the drop-on-demand micro-dispensing technique, as a strategic approach in the fight against infection along with the promotion of bone tissue regeneration. The homogeneous distribution of silicon-substituted hydroxyapatite and silver-substituted hydroxyapatite micro-droplets at alternate position in silicon-substituted hydroxyapatite-silver-substituted hydroxyapatite/hydroxyapatite coating delayed the exponential growth of Staphylococcus aureus for up to 24 h, and gave rise to up-regulated expression of alkaline phosphatase activity, type I collagen and osteocalcin as compared to hydroxyapatite and silver-substituted hydroxyapatite coatings. Despite containing reduced amounts of silicon-substituted hydroxyapatite and silver-substituted hydroxyapatite micro-droplets over the coated area than silicon-substituted hydroxyapatite and silver-substituted hydroxyapatite coatings, silicon-substituted hydroxyapatite-silver-substituted hydroxyapatite/hydroxyapatite coating exhibited effective antibacterial property with enhanced bioactivity. By exhibiting good controllability of distributing silicon-substituted hydroxyapatite, silver-substituted hydroxyapatite and hydroxyapatite micro-droplets, it was demonstrated that drop-on-demand micro-dispensing technique was capable in harnessing the advantages of silver-substituted hydroxyapatite, silicon-substituted hydroxyapatite and hydroxyapatite to produce a multi-material coating along with enhanced bioactivity and reduced infection.
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Affiliation(s)
- Poon Nian Lim
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117 576, Singapore
| | - Zuyong Wang
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117 576, Singapore
| | - Lei Chang
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117 576, Singapore
| | - Toshiisa Konishi
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117 576, Singapore
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan
| | - Cleo Choong
- School of Materials Science and Engineering, Nanyang Technology University, 50 Nanyang Avenue, Singapore, 639 798, Singapore
| | - Bow Ho
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore, 119 757, Singapore
| | - Eng San Thian
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117 576, Singapore.
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138
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Cunningham D, Parajuli KR, Zhang C, Wang G, Mei J, Zhang Q, Liu S, You Z. Monomethyl Auristatin E Phosphate Inhibits Human Prostate Cancer Growth. Prostate 2016; 76:1420-30. [PMID: 27325602 PMCID: PMC5033698 DOI: 10.1002/pros.23226] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 06/08/2016] [Indexed: 02/05/2023]
Abstract
BACKGROUND Bone metastasis from primary prostate cancer leads to markedly diminished quality of life with poor long-term survival. Bone seeking treatment options are limited with adverse consequences on rapidly proliferating tissues such as bone marrow. In the present study, we seek to determine the bone-enriching capabilities of monomethyl auristatin E phosphate (MMAEp), a derivative of the potent antimitotic monomethyl auristatin E (MMAE). METHODS The in vitro actions and mechanisms of cytotoxicity were assessed using cell viability, immunofluorescence, flow cytometry, and Western blot analysis. In vivo efficacy was determined using an intratibial xenograft mouse model of human prostate cancer and live animal imaging. RESULTS The half maximal inhibitory concentration (IC50) of MMAE and MMAEp was determined to be approximately 2 and 48 nM, respectively, in PC-3 and C4-2B cell lines. MMAEp retained the mechanism of action of MMAE in reducing microtubule polymerization and stalling cell cycle progression at the G2/M transition. MMAEp was able to bind hydroxyapatite in in vitro assays. MMAEp significantly reduced intratibial tumor growth compared to the vehicle control treatment. CONCLUSIONS MMAEp is an antimitotic compound that binds to calcium ions in the bone and inhibits prostate tumor growth in the bone. Prostate 76:1420-1430, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- David Cunningham
- Department of Structural and Cellular Biology, Tulane University, New Orleans, Louisiana
| | - Keshab R Parajuli
- Department of Structural and Cellular Biology, Tulane University, New Orleans, Louisiana
| | - Changde Zhang
- Department of Chemistry and RCMI Cancer Research Center, Xavier University of Louisiana, New Orleans, Louisiana
| | - Guangdi Wang
- Department of Chemistry and RCMI Cancer Research Center, Xavier University of Louisiana, New Orleans, Louisiana
| | - Jiandong Mei
- Department of Structural and Cellular Biology, Tulane University, New Orleans, Louisiana
- Department of Thoracic Surgery, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China
| | - Qiuyang Zhang
- Department of Structural and Cellular Biology, Tulane University, New Orleans, Louisiana
| | - Sen Liu
- Department of Structural and Cellular Biology, Tulane University, New Orleans, Louisiana
| | - Zongbing You
- Department of Structural and Cellular Biology, Tulane University, New Orleans, Louisiana.
- Department of Orthopaedic Surgery, Tulane University, New Orleans, Louisiana.
- Tulane Cancer Center, Louisiana Cancer Research Consortium, Tulane University, New Orleans, Louisiana.
- Tulane Center for Stem Cell Research and Regenerative Medicine, Tulane University, New Orleans, Louisiana.
- Tulane Center for Aging, Tulane University, New Orleans, Louisiana.
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