1
|
Çiftci Dede E, Korkusuz P, Bilgiç E, Çetinkaya MA, Korkusuz F. Boron Nano-hydroxyapatite Composite Increases the Bone Regeneration of Ovariectomized Rabbit Femurs. Biol Trace Elem Res 2022; 200:183-196. [PMID: 33715074 DOI: 10.1007/s12011-021-02626-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 02/03/2021] [Indexed: 10/21/2022]
Abstract
Osteoporosis is a systemic metabolic disease defined by a decreased bone mineral density, microarchitectural deterioration, and an increased incidence of fragility fractures that may lead to morbidity and mortality. Boron may stimulate new bone formation and regeneration, when combined with nano-hydroxyapatite. We questioned whether injecting boron-containing nano-hydroxyapatite composites with hyaluronan increased the bone mineral density and new bone formation in osteoporotic rabbit femurs. The regenerative effects of injectable boron-containing nano-hydroxyapatite composites from 6 to 12 weeks, which may prevent osteoporotic femoral fractures, were assessed. Boron-containing (10 μg/ml) nano-hydroxyapatite composites were injected into the intramedullary femoral cavity with hyaluronan. These significantly increased the histomorphometric new bone surface to the total bone surface ratio at 6 and 9 weeks. The micro-tomographic bone volume to the total volume ratio and bone mineral density in osteoporotic rabbit femurs increased when compared to the hyaluronan (p = 0.004, p = 0.004, p = 0.004, p = 0.01, respectively) and the sham-control (p = 0.01, p = 0.004, p = 0.01, p = 0.037, respectively) groups. The boron-containing group had a higher bone mineralization and new bone formation compared to the nano-hydroxyapatite group, although the difference was not statistically significant. These findings reveal that intramedullary injection of boron-containing nano-hydroxyapatite with hyaluronan increases new bone formation and mineralization in ovariectomized rabbit femurs. Boron-containing nano-hydroxyapatite composites are promising tissue engineering biomaterials that may have regenerative potential in preventing primary and/or secondary femoral fractures in osteoporosis patients.
Collapse
Affiliation(s)
- Eda Çiftci Dede
- Department of Bioengineering, Graduate School of Science and Engineering, Hacettepe University, Beytepe, Ankara, 06810, Turkey
| | - Petek Korkusuz
- Department of Histology and Embryology, Faculty of Medicine, Hacettepe University, Sıhhiye, Ankara, 06100, Türkiye
| | - Elif Bilgiç
- Department of Histology and Embryology, Faculty of Medicine, Hacettepe University, Sıhhiye, Ankara, 06100, Türkiye
| | - Mehmet Alper Çetinkaya
- Animal Research Center, Faculty of Medicine, Hacettepe University, Sıhhiye, Ankara, 06100, Turkey
| | - Feza Korkusuz
- Department of Sport Medicine, Faculty of Medicine, Hacettepe University, Sıhhiye, Ankara, 06100, Türkiye.
| |
Collapse
|
2
|
Baars J, Grimm I, Blunk D, Neudörfl J, Schmalz H. Enantioselective Total Synthesis and Structural Revision of Dysiherbol A. Angew Chem Int Ed Engl 2021; 60:14915-14920. [PMID: 33978302 PMCID: PMC8251742 DOI: 10.1002/anie.202105733] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Indexed: 12/25/2022]
Abstract
A 12-step total synthesis of the natural product dysiherbol A, a strongly anti-inflammatory and anti-tumor avarane meroterpene isolated from the marine sponge Dysidea sp., was elaborated. As key steps, the synthesis features an enantioselective Cu-catalyzed 1,4-addition/enolate-trapping opening move, an Au-catalyzed double cyclization to build up the tetracyclic core-carbon skeleton, and a late installation of the C5-bridgehead methyl group via proton-induced cyclopropane opening associated with spontaneous cyclic ether formation. The obtained pentacyclic compound (corresponding to an anhydride of the originally suggested structure for dysiherbol A) showed identical spectroscopic data as the natural product, but an opposite molecular rotation. CD-spectroscopic measurements finally confirmed that both the constitution and the absolute configuration of the originally proposed structure of (+)-dysiherbol A need to be revised.
Collapse
Affiliation(s)
- Julian Baars
- University of CologneDepartment of ChemistryGreinstrasse 450939CologneGermany
| | - Isabelle Grimm
- University of CologneDepartment of ChemistryGreinstrasse 450939CologneGermany
| | - Dirk Blunk
- University of CologneDepartment of ChemistryGreinstrasse 450939CologneGermany
| | | | | |
Collapse
|
3
|
Yu L, Silva Santisteban TM, Liu Q, Hu C, Bi J, Wei M. Effect of three-dimensional porosity gradients of biomimetic coatings on their bonding strength and cell behavior. J Biomed Mater Res A 2020; 109:615-626. [PMID: 32608169 DOI: 10.1002/jbm.a.37046] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 03/19/2020] [Accepted: 06/06/2020] [Indexed: 02/06/2023]
Abstract
Surface modification techniques are often used to enhance the properties of Ti-based materials as hard-tissue replacements. While the microstructure of the coating and the quality of the interface between the substrate and coating are essential to evaluate the reliability and applicability of the surface modification. In this study, both a hydroxyapatite (HA) coating and a collagen-hydroxyapatite (Col-HA) composite coating were deposited onto a Ti-6Al-4V substrate using a biomimetic coating process. Importantly, a gradient cross-sectional structure with a porous coating toward the surface, while a dense layer adjacent to the interface between the coating and substrate was observed in three-dimensional (3D) from both the HA and Col-HA coatings via a dual-beam focused ion beam-scanning electron microscope (FIB-SEM). Moreover, the pore distributions within the entire coatings were reconstructed in 3D using Avizo, and the pores size distributions along the coating depth were calculated using RStudio. By evaluating the mechanical property and biocompatibility of these materials and closely observing the cross-sectional cell-coating-substrate interfaces using FIB-SEM, it was revealed that the porous surface created by both coatings well supports osteoblast cell adhesion while the dense inner layer facilitates a good bonding between the coating and the substrate. Although the mechanical property of the coating decreased with the addition of collagen, it is still strong enough for implant handling and the biocompatibility was promoted.
Collapse
Affiliation(s)
- Le Yu
- Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut, USA.,Department of Chemical and Biomolecular Engineering, Ohio University, Athens, Ohio, USA
| | | | - Qinqing Liu
- Department of Computer Science and Engineering, University of Connecticut, Storrs, Connecticut, USA
| | - Changmin Hu
- Institute of Materials Science, University of Connecticut, Storrs, Connecticut, USA
| | - Jinbo Bi
- Department of Computer Science and Engineering, University of Connecticut, Storrs, Connecticut, USA
| | - Mei Wei
- Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut, USA.,Institute of Materials Science, University of Connecticut, Storrs, Connecticut, USA.,Department of Mechanical Engineering, Ohio University, Athens, Ohio, USA
| |
Collapse
|
4
|
Wang C, Liu J, Liu Y, Qin B, He D. Study on osteogenesis of zinc-loaded carbon nanotubes/chitosan composite biomaterials in rat skull defects. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:15. [PMID: 31965348 DOI: 10.1007/s10856-019-6338-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
Chitosan with hydroxyapatite composition, a natural polymer, may be a biomaterial of importance for bone regeneration. Carbon nanotube, a nanoscale material, has been another focus for bone restoration. Zinc, an essential trace element, contributes to the development and growth of skeletal system. The purpose of the current research was to investigate the effects of Zinc-loaded Carbon Nanotubes/Chitosan composite biomaterials in the restoration of rat skull defects, and to verify the hypothesis that these zinc ions of appropriate concentration would strengthen the osteogenesis of rat defects. Four different groups of composite biomaterials were fabricated from no Zinc Carbon nanotubes/Chitosan (GN), 0.2% Zinc-Carbon nanotubes/Chitosan (GL), 1% Zinc-Carbon nanotubes/Chitosan (GM) and 2% Zinc-Carbon nanotubes/Chitosan (GH). After characterizations, these composite biomaterials were then transplanted into rat skull defects. The experimental animals were executed at 12 weeks after transplanted surgeries, and the rat skull defects were removed for related analyses. The results of characterizations suggested the Zinc-loaded composite biomaterials possessed good mechanical and osteoinductive properties. An important finding was that the optimal osteogenic effect appeared in rat skull defects transplanted with 1% Zinc-Carbon nanotubes/Chitosan. Overall, these composite biomaterials revealed satisfactory osteogenesis, nevertheless, there was a requirement to further perfect the zinc ion concentrations to achieve the better bone regeneration.
Collapse
Affiliation(s)
- Chenbing Wang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, 030001, China
| | - Jinlong Liu
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, 030001, China
| | - Yanbo Liu
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, 030001, China
| | - Boheng Qin
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, 030001, China
| | - Dongning He
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, 030001, China.
| |
Collapse
|
5
|
Camacho-Alonso F, Martínez-Ortiz C, Plazas-Buendía L, Mercado-Díaz AM, Vilaplana-Vivo C, Navarro JA, Buendía AJ, Merino JJ, Martínez-Beneyto Y. Bone union formation in the rat mandibular symphysis using hydroxyapatite with or without simvastatin: effects on healthy, diabetic, and osteoporotic rats. Clin Oral Investig 2020; 24:1479-1491. [PMID: 31925587 DOI: 10.1007/s00784-019-03180-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 12/19/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The objective is to compare new bone formation in critical defects in healthy, diabetic, and osteoporotic rats filled with hydroxyapatite (HA) alone and HA combined with simvastatin (SV). MATERIALS AND METHODS A total of 48 adult female Sprague-Dawley rats were randomized into three groups (n = 16 per group): Group, 1 healthy; Group 2, diabetics; and Group 3, osteoporotics. Streptozotocin was used to induce type 1 diabetes in Group 2, while bilateral ovariectomy was used to induce osteoporosis in Group 3. The central portion of the rat mandibular symphysis was used as a physiological critical bone defect. In each group, eight defects were filled with HA alone and eight with HA combined with SV. The animals were sacrificed at 4 and 8 weeks, and the mandibles were processed for micro-computed tomography to analyze radiological union and bone mineral density (BMD); histological analysis of the bone union; and immunohistochemical analysis, which included immunoreactivity of vascular endothelial growth factor (VEGF) and bone morphogenetic protein 2 (BMP-2). RESULTS In all groups (healthy, diabetics, and osteoporotics), the defects filled with HA + SV presented greater radiological bone union, BMD, histological bone union, and more VEGF and BMP-2 positivity, in comparison with bone defects treated with HA alone. CONCLUSIONS Combined application of HA and SV improves bone regeneration in mandibular critical bone defects compared with application of HA alone in healthy, diabetic, and osteoporotic rats. CLINICAL RELEVANCE This study might help to patients with osteoporosis or uncontrolled diabetes type 1, but future studies should be done.
Collapse
Affiliation(s)
- F Camacho-Alonso
- Department of Oral Surgery, University of Murcia, Murcia, Spain.
| | | | | | | | | | - J A Navarro
- Department of Histology and Pathological Anatomy, University of Murcia, Murcia, Spain
| | - A J Buendía
- Department of Histology and Pathological Anatomy, University of Murcia, Murcia, Spain
| | - J J Merino
- Department of Biochemistry and Molecular Biology, Complutense University of Madrid, Madrid, Spain
| | - Y Martínez-Beneyto
- Department of Preventive and Community Dentistry, University of Murcia, Murcia, Spain
| |
Collapse
|
6
|
Wetteland CL, Liu H. Optical and biological properties of polymer-based nanocomposites with improved dispersion of ceramic nanoparticles. J Biomed Mater Res A 2019; 106:2692-2707. [PMID: 29901266 DOI: 10.1002/jbm.a.36466] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/09/2018] [Accepted: 05/22/2018] [Indexed: 11/08/2022]
Abstract
This article reports a new process for creating polymer-based nanocomposites with enhanced dispersion of ceramic nanoparticles without using any surfactants, and the resulted changes in their optical and biological properties. Specifically, dispersion of two different ceramic nanoparticles, that is, hydroxyapatite (nHA) and magnesium oxide (nMgO) nanoparticles, in a model biodegradable polymer, namely poly(lactic-co-glycolic acid) (PLGA), was studied. High-power sonication was integrated with dual asymmetric centrifugal (DAC) mixing to improve dispersion of nanoparticles during solvent casting. The polymer/solvent ratio was optimized to improve nanoparticle dispersion in the multistep processing, including enhancing the efficacy of sonication and DAC mixing and reducing nanoparticle sedimentation during solvent-casting. Microstructural characterization confirmed that this new process improved nanoparticle dispersion in nMgO/PLGA and nHA/PLGA nanocomposites. Improved nanoparticle dispersion increased the optical transparency visually and optical transmission quantitatively for both nHA/PLGA and nMgO/PLGA nanocomposites. Improved dispersion of nanoparticles improved the adhesion of bone marrow derived mesenchymal stem cells (BMSCs) on nHA/PLGA but decreased BMSC viability on nMgO/PLGA. This difference is likely because the chemistry of nHA and nMgO had different effects on BMSCs. This study provided a new process for enhancing dispersion of ceramic nanoparticles in a polymer matrix and revealed the effects of dispersion on optical properties and cell responses, which are valuable for engineering optimal ceramic/polymer nanocomposites for different biomedical applications. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 2692-2707, 2018.
Collapse
Affiliation(s)
| | - Huinan Liu
- Department of Bioengineering, University of California, Riverside, California 92521.,Materials Science and Engineering Program, University of California, Riverside, California 92521.,Stem Cell Center, University of California, Riverside, California 92521
| |
Collapse
|
7
|
Camargo WA, de Vries R, van Luijk J, Hoekstra JW, Bronkhorst EM, Jansen JA, van den Beucken JJJP. Diabetes Mellitus and Bone Regeneration: A Systematic Review and Meta-Analysis of Animal Studies. TISSUE ENGINEERING PART B-REVIEWS 2017; 23:471-479. [PMID: 27981888 DOI: 10.1089/ten.teb.2016.0370] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND The regeneration of bone defects resulting from trauma, resection of tumors, infection, or congenital disease is a challenge, and bone grafts are utilized in a wide array of clinical settings to augment bone repair and regeneration. Diabetes mellitus (DM) is a chronic metabolic disease, which affects 8.3% of the world population, summing ∼387 million individuals. The consequences of the disease, for example, hyperglycemia, have been associated to a reduced capacity to form bone and poor bone quality, influencing bone healing. Our aim was to systematically review the literature to the effect of diabetic condition on bone regeneration in animal models, when using bone substitute materials from different origins, and perform a meta-analysis to quantitatively study the effect of DM on bone regeneration. METHODS An extensive search strategy was carried out through PubMed and EMBASE to identify the potential relevant studies published from database inception until July 1, 2015. Initially, the title and abstract of 1409 studies were screened, after which inclusion criteria sorted 29 studies for full-text evaluation. After using exclusion criteria, a final number of seven studies could be included in the review. RESULTS The seven included studies that passed our inclusion/exclusion criteria were all type 1 diabetes, comprising a total of 189 animals and 14 intrastudy comparisons. These studies presented a consistent and reduced risk of bias and showed a significant average effect size of -6.87% of bone formation for diabetes type 1 versus healthy condition [95% confidence interval: -10.55 to -3.18; I2 = 87.4%; p = 0.0003]. INTERPRETATION These findings prove that DM type 1 negatively influences bone formation compared with a healthy condition, irrespective of the bone substitute material used.
Collapse
Affiliation(s)
- Winston A Camargo
- 1 Department of Biomaterials (309), Radboud University Medical Center , Nijmegen, The Netherlands
| | - Rob de Vries
- 2 Systematic Review Centre for Laboratory Animal Experimentation, Radboud University Medical Center , Nijmegen, The Netherlands
| | - Judith van Luijk
- 2 Systematic Review Centre for Laboratory Animal Experimentation, Radboud University Medical Center , Nijmegen, The Netherlands
| | - Jan Willem Hoekstra
- 1 Department of Biomaterials (309), Radboud University Medical Center , Nijmegen, The Netherlands
| | - Ewald M Bronkhorst
- 1 Department of Biomaterials (309), Radboud University Medical Center , Nijmegen, The Netherlands
| | - John A Jansen
- 1 Department of Biomaterials (309), Radboud University Medical Center , Nijmegen, The Netherlands
| | | |
Collapse
|
8
|
Ezirganlı Ş, Kazancıoğlu HO, Mihmanlı A, Aydın MŞ, Sharifov R, Alkan A. The effect of local simvastatin application on critical size defects in the diabetic rats. Clin Oral Implants Res 2013; 25:969-76. [PMID: 23600677 DOI: 10.1111/clr.12177] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2013] [Indexed: 01/19/2023]
Abstract
OBJECTIVES To evaluate bone-healing effects of local simvastatin application to critical size defects (CSDs) in the experimental diabetes mellitus (DM) rat model. MATERIALS AND METHODS A total of 35 male Sprague-Dawley rats with an average weight of 350 g and aged 3 months were used in this study. The rats were divided into five groups of seven animals each: passive control (group A), active control (group B), 0.5 mg simvastatin (group C), 1.0 mg simvastatin (group D), and 1.5 mg simvastatin (group E). Streptozotocin was used to induce Type 1 diabetes in all rats. Eight mm CSDs were created under anesthesia in each rat calvarium. CSDs were left empty in group A. Defects in group B were grafted alone with a gelatin sponge mixed with normal saline. Defects in the experimental groups (groups A, B, and C) were grafted with gelatin sponge mixed saline solutions contain 0.5, 1.0, 1.5 mg simvastatin. Rats were sacrificed after 1 month, and the defects were prepared for radiologic and histomorphometric assessment of regenerated bone. RESULTS None of the specimens exhibited complete closure of new bone across the 8-mm defect. A correlation between computed tomography and histomorphometric analysis was not determined. Both amount of volume and area of regenerated bone were found higher in the experimental groups than in the control groups. However, these values were not found statistically significant degree (P < 0.05) for each groups. The density of regenerated bone in the region of interest was higher in the control groups in contrast to in the experimental groups. However, statistical significance was just found between groups C and A and between groups C and B (P < 0.05). CONCLUSION The local simvastatin application enhanced healing of the bone defects in the diabetic rat model CSDs.
Collapse
Affiliation(s)
- Şeref Ezirganlı
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Bezmialem Vakif University, İstanbul, Turkey
| | | | | | | | | | | |
Collapse
|