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Song J, Wang Y, Zhu Z, Wang W, Yang H, Shan Z. Negative Regulation of LINC01013 by METTL3 and YTHDF2 Enhances the Osteogenic Differentiation of Senescent Pre-Osteoblast Cells Induced by Hydrogen Peroxide. Adv Biol (Weinh) 2024; 8:e2300642. [PMID: 38548669 DOI: 10.1002/adbi.202300642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/19/2024] [Indexed: 05/15/2024]
Abstract
Senescent pre-osteoblasts have a reduced ability to differentiate, which leads to a reduction in bone formation. It is critical to identify the keys that regulate the differentiation fate of senescent pre-osteoblasts. LINC01013 has an essential role in cell stemness, differentiation, and senescence regulation. This study aims to examine the role and mechanism of LINC01013 in regulating osteogenic differentiation in senescent human embryonic osteoblast cell line (hFOB1.19) cells induced by hydrogen peroxide (H2O2). The results show that LINC01013 decreased alkaline phosphatase activity, mineralization of hFOB1.19 cells in vitro, and the expression of collagen II, osteocalcin, and bone sialoprotein. LINC01013 knockdown enhances the osteogenesis of hFOB1.19 cells and rescues osteogenic differentiation impaired by H2O2. METTL3 negatively regulates LINC01013 expression, enhancing hFOB1.19 cells' osteogenesis in vitro and in vivo. METTL3 overexpression can enhance hFOB1.19 cells' osteogenic differentiation impaired by H2O2. YTHDF2 promotes LINC01013 decay, facilitating osteogenic differentiation. YTHDF2 overexpression rescues hFOB1.19 cells osteogenic differentiation impaired by H2O2. Taken together, METTL3 upregulates osteogenic differentiation by inhibiting LINC01013, and YTHDF2 accelerates LINC01013 degradation, reducing its inhibitory effect. This study highlights LINC01013 as a key regulator in the fate switching process of senescent hFOB1.19 cells, impacting osteogenic differentiation.
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Affiliation(s)
- Jiaxin Song
- Outpatient Department of Oral and Maxillofacial Surgery, School of Stomatology, Capital Medical University, Beijing, 100050, China
| | - Yuejun Wang
- Laboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, 100050, China
| | - Zhao Zhu
- Outpatient Department of Oral and Maxillofacial Surgery, School of Stomatology, Capital Medical University, Beijing, 100050, China
| | - Wanqing Wang
- Laboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, 100050, China
| | - Haoqing Yang
- Laboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, 100050, China
| | - Zhaochen Shan
- Outpatient Department of Oral and Maxillofacial Surgery, School of Stomatology, Capital Medical University, Beijing, 100050, China
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2
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Kelany NA, El-Sayed ASA, Ibrahim MA. Aspergillus terreus camptothecin-sodium alginate/titanium dioxide nanoparticles as a novel nanocomposite with enhanced compatibility and anticancer efficiency in vivo. BMC Biotechnol 2023; 23:9. [PMID: 37005635 PMCID: PMC10067238 DOI: 10.1186/s12896-023-00778-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 03/28/2023] [Indexed: 04/04/2023] Open
Abstract
BACKGROUND Camptothecin derivatives are one of the most prescribed anticancer drugs for cancer patients, however, the availability, efficiency, and water solubility are the major challenges that halt the applicability of this drug. METHODS Biosynthetic potency of camptothecin by Aspergillus terreus, open a new avenue for commercial camptothecin production, due to their short-life span, feasibility of controlled growth conditions, and affordability for higher growth, that fulfill the availability of the scaffold of this drug. RESULTS Camptothecin (CPT) was purified from the filtrates of A. terreus, and their purity was checked by HPLC, and its chemical structure was verified by LC/MS, regarding to the authentic one. To improve the anticancer efficiency of A. terreus CPT, the drug was conjugated with sodium alginate (SA)/Titanium dioxide nanoparticles (TiO2NPs) composites, and their physicochemical properties were assessed. From the FT-IR profile, a numerous hydrogen bond interactions between TiO2 and SA chains in the SA/TiO2 nanocomposites, in addition to the spectral changes in the characteristic bands of both SA/TiO2 and CPT that confirmed their interactions. Transmission electron microscopy analysis reveals the spherical morphology of the developed SA/TiO2NPs nanocomposite, with the average particle size ~ 13.3 ± 0.35 nm. From the results of zeta potential, successful loading and binding of CPT with SA/TiO2 nanocomposites were observed. CONCLUSION The in vivo study authenticates the significant improvement of the antitumor activity of CPT upon loading in SA/TiO2 nanocomposites, with affordable stability of the green synthesized TiO2NPs with Aloe vera leaves extract.
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Affiliation(s)
- Nermeen A Kelany
- Department of Physics, Faculty of Science, Zagazig University, PO 44519, Zagazig, Egypt
| | - Ashraf S A El-Sayed
- Enzymology and Fungal Biotechnology Lab, Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.
| | - Manar A Ibrahim
- Department of Physics, Faculty of Science, Zagazig University, PO 44519, Zagazig, Egypt
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Sun H, Meng S, Chen J, Wan Q. Effects of Hyperlipidemia on Osseointegration of Dental Implants and Its Strategies. J Funct Biomater 2023; 14:jfb14040194. [PMID: 37103284 PMCID: PMC10145040 DOI: 10.3390/jfb14040194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
Hyperlipidemia refers to the abnormal increase in plasma lipid level exceeding the normal range. At present, a large number of patients require dental implantation. However, hyperlipidemia affects bone metabolism, promotes bone loss, and inhibits the osseointegration of dental implants through the mutual regulation of adipocytes, osteoblasts, and osteoclasts. This review summarized the effects of hyperlipidemia on dental implants and addressed the potential strategies of dental implants to promote osseointegration in a hyperlipidemic environment and to improve the success rate of dental implants in patients with hyperlipidemia. We summarized topical drug delivery methods to solve the interference of hyperlipidemia in osseointegration, which were local drug injection, implant surface modification and bone-grafting material modification. Statins are the most effective drugs in the treatment of hyperlipidemia, and they also encourage bone formation. Statins have been used in these three methods and have been found to be positive in promoting osseointegration. Directly coating simvastatin on the rough surface of the implant can effectively promote osseointegration of the implant in a hyperlipidemic environment. However, the delivery method of this drug is not efficient. Recently, a variety of efficient methods of simvastatin delivery, such as hydrogels and nanoparticles, have been developed to boost bone formation, but few of them were applied to dental implants. Applicating these drug delivery systems using the three aforementioned ways, according to the mechanical and biological properties of materials, could be promising ways to promote osseointegration under hyperlipidemic conditions. However, more research is needed to confirm.
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Kamynina OK, Kravchuk KS, Lazov MA, Pestov SM. Effect of Surface Roughness on the Properties of Titanium Materials for Bone Implants. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621080106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Ehsani A, Jodaei A, Barzegar-Jalali M, Fathi E, Farahzadi R, Adibkia K. Nanomaterials and Stem Cell Differentiation Potential: An Overview of Biological Aspects and Biomedical Efficacy. Curr Med Chem 2021; 29:1804-1823. [PMID: 34254903 DOI: 10.2174/0929867328666210712193113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 06/08/2021] [Accepted: 06/10/2021] [Indexed: 11/22/2022]
Abstract
Nanoparticles (NPs) due to their medical applications are widely used. Accordingly, the use of mesenchymal stem cells is one of the most important alternatives in tissue engineering field. NPs play effective roles in stem cells proliferation and differentiation. The combination of NPs and tissue regeneration by stem cells has created new therapeutic approach towards humanity. Of note, the physicochemical properties of NPs determine their biological function. Interestingly, various mechanisms such as modulation of signaling pathways and generation of reactive oxygen species, are involved in NPs-induced cellular proliferation and differentiation. This review summarized the types of nanomaterials effective on stem cell differentiation, the physicochemical features, biomedical application of these materials and relationship between nanomaterials and environment.
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Affiliation(s)
- Ali Ehsani
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Asma Jodaei
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Ezzatollah Fathi
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
| | - Raheleh Farahzadi
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Khosro Adibkia
- Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
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6
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Jin H, Ji Y, Cui Y, Xu L, Liu H, Wang J. Simvastatin-Incorporated Drug Delivery Systems for Bone Regeneration. ACS Biomater Sci Eng 2021; 7:2177-2191. [PMID: 33877804 DOI: 10.1021/acsbiomaterials.1c00462] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Local drug delivery systems composed of biomaterials and osteogenic substances provide promising strategies for the reconstruction of large bone defects. In recent years, simvastatin has been studied extensively for its pleiotropic effects other than lowering of cholesterol, including its ability to induce osteogenesis and angiogenesis. Accordingly, several studies of simvastatin incorporated drug delivery systems have been performed to demonstrate the feasibility of such systems in enhancing bone regeneration. Therefore, this review explores the molecular mechanisms by which simvastatin affects bone metabolism and angiogenesis. The simvastatin concentrations that promote osteogenic differentiation are analyzed. Furthermore, we summarize and discuss a variety of simvastatin-loaded drug delivery systems that use different loading methods and materials. Finally, current shortcomings of and future development directions for simvastatin-loaded drug delivery systems are summarized. This review provides various advanced design strategies for simvastatin-incorporated drug delivery systems that can enhance bone regeneration.
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Affiliation(s)
- Hui Jin
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun 130041, P.R. China.,Department of Pain, The Second Hospital of Jilin University, Changchun 130041, P.R. China
| | - Youbo Ji
- Department of Pain, The Second Hospital of Jilin University, Changchun 130041, P.R. China
| | - Yutao Cui
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun 130041, P.R. China
| | - Li Xu
- Department of Orthopedics, Weihai Guanghua Hospital, Weihai 264200, P.R. China
| | - He Liu
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun 130041, P.R. China
| | - Jincheng Wang
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun 130041, P.R. China
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7
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Silk fibroin/collagen 3D scaffolds loaded with TiO2 nanoparticles for skin tissue regeneration. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03475-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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8
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Elango J, Selvaganapathy PR, Lazzari G, Bao B, Wenhui W. Biomimetic collagen-sodium alginate-titanium oxide (TiO2) 3D matrix supports differentiated periodontal ligament fibroblasts growth for periodontal tissue regeneration. Int J Biol Macromol 2020; 163:9-18. [DOI: 10.1016/j.ijbiomac.2020.06.173] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/13/2020] [Accepted: 06/18/2020] [Indexed: 12/14/2022]
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9
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Leon-Ramos JR, Diosdado-Cano JM, López-Santos C, Barranco A, Torres-Lagares D, Serrera-Figallo MÁ. Influence of Titanium Oxide Pillar Array Nanometric Structures and Ultraviolet Irradiation on the Properties of the Surface of Dental Implants-A Pilot Study. NANOMATERIALS 2019; 9:nano9101458. [PMID: 31615097 PMCID: PMC6835777 DOI: 10.3390/nano9101458] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/04/2019] [Accepted: 10/10/2019] [Indexed: 12/16/2022]
Abstract
Aim: Titanium implants are commonly used as replacement therapy for lost teeth and much current research is focusing on the improvement of the chemical and physical properties of their surfaces in order to improve the osseointegration process. TiO2, when it is deposited in the form of pillar array nanometric structures, has photocatalytic properties and wet surface control, which, together with UV irradiation, provide it with superhydrophilic surfaces, which may be of interest for improving cell adhesion on the peri-implant surface. In this article, we address the influence of this type of surface treatment on type IV and type V titanium discs on their surface energy and cell growth on them. Materials and methods: Samples from titanium rods used for making dental implants were used. There were two types of samples: grade IV and grade V. In turn, within each grade, two types of samples were differentiated: untreated and treated with sand blasting and subjected to double acid etching. Synthesis of the film consisting of titanium oxide pillar array structures was carried out using plasma-enhanced chemical vapor deposition equipment. The plasma was generated in a quartz vessel by an external SLAN-1 microwave source with a frequency of 2.45 GHz. Five specimens from each group were used (40 discs in total). On the surfaces to be studied, the following determinations were carried out: (a) X-ray photoelectron spectroscopy, (b) scanning electron microscopy, (c) energy dispersive X-ray spectroscopy, (d) profilometry, (e) contact angle measurement or surface wettability, (f) progression of contact angle on applying ultraviolet irradiation, and (g) a biocompatibility test and cytotoxicity with cell cultures. Results: The application of ultraviolet light decreased the hydrophobicity of all the surfaces studied, although it did so to a greater extent on the surfaces with the studied modification applied, this being more evident in samples manufactured in grade V titanium. In samples made in grade IV titanium, this difference was less evident, and even in the sample manufactured with grade IV and SLA treatment, the application of the nanometric modification of the surface made the surface optically less active. Regarding cell growth, all the surfaces studied, grouped in relation to the presence or not of the nanometric treatment, showed similar growth. Conclusions. Treatment of titanium oxide surfaces with ultraviolet irradiation made them change temporarily into superhydrophilic ones, which confirms that their biocompatibility could be improved in this way, or at least be maintained.
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Affiliation(s)
- Juan-Rey Leon-Ramos
- Institute of Materials Science of Seville, CSIC-University of Seville, Américo Vespucio Street n 49, 41092 Seville, Spain.
| | | | - Carmen López-Santos
- Institute of Materials Science of Seville, CSIC-University of Seville, Américo Vespucio Street n 49, 41092 Seville, Spain.
- Department of Atomic, Molecular and Nuclear Physics, Faculty of Physics, University of Seville, Reina Mercedes Street, 41012 Seville, Spain.
| | - Angel Barranco
- Institute of Materials Science of Seville, CSIC-University of Seville, Américo Vespucio Street n 49, 41092 Seville, Spain.
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10
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Ding X, Wang S, Jin W, Liu X, Chen J, Chen S. Encapsulation of a nanoporous simvastatin-chitosan composite to enhance osteointegration of hydroxyapatite-coated polyethylene terephthalate ligaments. Int J Nanomedicine 2019; 14:4881-4893. [PMID: 31308664 PMCID: PMC6613541 DOI: 10.2147/ijn.s210687] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 06/11/2019] [Indexed: 01/13/2023] Open
Abstract
PURPOSE This study was designed to evaluate the in vitro and in vivo biocompatibility and osteointegration of plasma-sprayed hydroxyapatite (HA)-coated polyethylene terephthalate (PET) ligaments encapsulated with a simvastatin (SV)-chitosan (CS) composite. METHODS This study compared the in vitro and in vivo bone responses to three different PET ligaments: SV/CS/PET-HA, CS/PET-HA and PET-HA. A field emission scanning electron microscope was used to characterize the morphology, and the in vitro SV release profile was analyzed. MC3T3 cells were cocultured with SV/CS/PET-HA, CS/PET-HA and PET-HA to test their biocompatibility using CCK-8 tests. Osteogenic differentiation was investigated by the expression of marker genes using qPCR. Osteointegration was performed by implanting the PET ligaments into the proximal tibia bone tunnels of male Sprague-Dawley rats for 3 weeks and 6 weeks. The bone-implant interface was evaluated by micro-computed tomography (micro-CT) and histological analysis. RESULTS The characteristic nanoporous structures mainly formed on the surface of the plasma-sprayed HA particles in the SV/CS/PET-HA and CS/PET-HA groups. The SV release test showed that the sustained release of simvastatin lasted for 25 days in the SV/CS/PET-HA group. The in vitro studies demonstrated that the SV/CS/PET-HA ligaments induced osteogenic differentiation in the MC3T3 cells, with higher mRNA expression levels of collagen-1, bone morphogenetic protein-2, osteocalcin and alkaline phosphatase than those in the CS/PET-HA and PET-HA ligament groups. The in vivo tests showed that both micro-CT analysis (bone mineral density and bone volume per total volume) and histological analysis (bone implant contact and interface area) revealed significantly higher peri-implant bone formation and less interface area in the SV/CS/PET-HA group than in the other groups. CONCLUSION The SV-CS composite nanoporous structure was associated with the improved biocompatibility and osteogenic differentiation in vitro and enhanced osteointegration process in vivo of plasma-sprayed HA-coated PET ligaments.
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Affiliation(s)
- Xiaoquan Ding
- Center of Sports Medicine, Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Siheng Wang
- Center of Sports Medicine, Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Wenhe Jin
- Center of Sports Medicine, Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Xingwang Liu
- Center of Sports Medicine, Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Jun Chen
- Center of Sports Medicine, Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
| | - Shiyi Chen
- Center of Sports Medicine, Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai200040, People’s Republic of China
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11
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Esser TU, Roshanbinfar K, Engel FB. Promoting vascularization for tissue engineering constructs: current strategies focusing on HIF-regulating scaffolds. Expert Opin Biol Ther 2019; 19:105-118. [PMID: 30570406 DOI: 10.1080/14712598.2019.1561855] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Vascularization remains one of the greatest yet unmet challenges in tissue engineering. When engineered tissues are scaled up to therapeutically relevant dimensions, their demand of oxygen and nutrients can no longer be met by diffusion. Thus, there is a need for perfusable vascular structures. Hypoxia-inducible factors (HIF) act as transcriptional oxygen sensors and regulate a multitude of genes involved in adaptive processes to hypoxia, including angiogenesis. Thus, targeting HIFs is a promising strategy to induce vascularization of engineered tissues. AREAS COVERED Here we review current vascularization strategies and summarize the present knowledge regarding activation of HIF signaling by ions, iron chelating agents, α-Ketoglutarate (αKG) analogues, and the lipid-lowering drug simvastatin to induce angiogenesis. Specifically, we focus on the incorporation of HIF-activating agents into biomaterials and scaffolds for controlled release. EXPERT OPINION Vascularization of tissue constructs through activation of upstream regulators of angiogenesis offers advantages but also suffers from drawbacks. HIFs can induce a complete angiogenic program; however, this program appears to be too slow to vascularize larger constructs before cell death occurs. It is therefore crucial that HIF-activation is combined with cell protective strategies and prevascularization techniques to obtain fully vascularized, vital tissues of therapeutically relevant dimensions.
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Affiliation(s)
- Tilman U Esser
- a Experimental Renal and Cardiovascular Research, Department of Nephropathology , Institute of Pathology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Erlangen , Germany
| | - Kaveh Roshanbinfar
- a Experimental Renal and Cardiovascular Research, Department of Nephropathology , Institute of Pathology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Erlangen , Germany
| | - Felix B Engel
- a Experimental Renal and Cardiovascular Research, Department of Nephropathology , Institute of Pathology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Erlangen , Germany
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12
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Castro AGB, Löwik DPM, van Steenbergen MJ, Jansen JA, van den Beucken JJJP, Yang F. Incorporation of simvastatin in PLLA membranes for guided bone regeneration: effect of thermal treatment on simvastatin release. RSC Adv 2018; 8:28546-28554. [PMID: 35542464 PMCID: PMC9084343 DOI: 10.1039/c8ra04397c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 08/05/2018] [Indexed: 01/09/2023] Open
Abstract
Electrospun membranes based on biodegradable polymers are promising materials to be used for guided bone regeneration (GBR) therapy. The incorporation of osteostimulatory compounds can improve the biofunctionality of those membranes, making them active players in bone regeneration. Simvastatin has been shown to promote osteogenic differentiation both in vitro and in vivo. However, in most of these systems, the drug was quickly released, not matching the pace of bone regeneration. The aim of this study was to develop poly(l-lactic acid) (PLLA) membranes containing simvastatin (SV) that have a prolonged drug release rate, compatible with GBR applications. To this end, SV was mixed with PLLA and electrospun. The membranes were subjected to a thermal treatment in order to increase the crystallinity of PLLA. Morphological, structural and chemical properties of the electrospun membranes were characterized. The effect of the thermal treatment on the release profile of SV was evaluated by near physiological release experiments at 37 °C. The osteostimulatory potential was determined by in vitro culture of the membranes with rat bone marrow stromal cells (rBMSCs). The results confirmed that the thermal treatment led to an increase in polymer crystallinity and a more sustained release of SV. In vitro assays demonstrate cellular proliferation over time for all the membranes and a significant increase in osteogenic differentiation for the membranes containing SV subjected to thermal treatment. Thermal treatment resulted in a sustained release of simvastatin and a positive response from rBMSCs.![]()
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Affiliation(s)
| | - Dennis W. P. M. Löwik
- Bio-organic Chemistry
- Institute for Molecules and Materials
- Radboud University Nijmegen
- Nijmegen
- The Netherlands
| | - Mies J. van Steenbergen
- Utrecht Institute for Pharmaceutical Sciences (UIPS)
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
| | - John A. Jansen
- Department of Biomaterials
- Radboudumc
- Nijmegen
- The Netherlands
| | | | - Fang Yang
- Department of Biomaterials
- Radboudumc
- Nijmegen
- The Netherlands
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13
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Tang D, Yang LY, Ou KL, Oreffo ROC. Repositioning Titanium: An In Vitro Evaluation of Laser-Generated Microporous, Microrough Titanium Templates As a Potential Bridging Interface for Enhanced Osseointegration and Durability of Implants. Front Bioeng Biotechnol 2017; 5:77. [PMID: 29322044 PMCID: PMC5732141 DOI: 10.3389/fbioe.2017.00077] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 11/23/2017] [Indexed: 11/21/2022] Open
Abstract
Although titanium alloys remain the preferred biomaterials for the manufacture of biomedical implants today, such devices can fail within 15 years of implantation due to inadequate osseointegration. Furthermore, wear debris toxicity due to alloy metal ion release has been found to cause side-effects including neurotoxicity and chronic inflammation. Titanium, with its known biocompatibility, corrosion resistance, and high elastic modulus, could if harnessed in the form of a superficial scaffold or bridging device, resolve such issues. A novel three-dimensional culture approach was used to investigate the potential osteoinductive and osseointegrative capabilities of a laser-generated microporous, microrough medical grade IV titanium template on human skeletal stem cells (SSCs). Human SSCs seeded on a rough 90-µm pore surface of ethylene oxide-sterilized templates were observed to be strongly adherent, and to display early osteogenic differentiation, despite their inverted culture in basal conditions over 21 days. Limited cellular migration across the template surface highlighted the importance of high surface wettability in maximizing cell adhesion, spreading and cell-biomaterial interaction, while restricted cell ingrowth within the conical-shaped pores underlined the crucial role of pore geometry and size in determining the extent of osseointegration of an implant device. The overall findings indicate that titanium only devices, with appropriate optimizations to porosity and surface wettability, could yet play a major role in improving the long-term efficacy, durability, and safety of future implant technology.
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Affiliation(s)
- Daniel Tang
- Centre for Human Development, Stem Cells and Regeneration, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Liang-Yo Yang
- Department of Physiology, School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan.,Research Center for Biotechnology, China Medical University Hospital, China Medical University, Taichung, Taiwan.,Department of Biotechnology, College of Medical and Health Science, Asia University, Taichung, Taiwan
| | - Keng-Liang Ou
- Department of Dentistry, Cathay General Hospital, Taipei, Taiwan.,Department of Dentistry, Taipei Medical University Hospital, Taipei, Taiwan.,Department of Dentistry, Taipei Medical University - Shuang Ho Hospital, New Taipei City, Taiwan.,3D Global Biotech Inc., New Taipei City, Taiwan
| | - Richard O C Oreffo
- Centre for Human Development, Stem Cells and Regeneration, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
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14
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Wei M, Li S, Le W. Nanomaterials modulate stem cell differentiation: biological interaction and underlying mechanisms. J Nanobiotechnology 2017; 15:75. [PMID: 29065876 PMCID: PMC5655945 DOI: 10.1186/s12951-017-0310-5] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 10/14/2017] [Indexed: 01/23/2023] Open
Abstract
Stem cells are unspecialized cells that have the potential for self-renewal and differentiation into more specialized cell types. The chemical and physical properties of surrounding microenvironment contribute to the growth and differentiation of stem cells and consequently play crucial roles in the regulation of stem cells’ fate. Nanomaterials hold great promise in biological and biomedical fields owing to their unique properties, such as controllable particle size, facile synthesis, large surface-to-volume ratio, tunable surface chemistry, and biocompatibility. Over the recent years, accumulating evidence has shown that nanomaterials can facilitate stem cell proliferation and differentiation, and great effort is undertaken to explore their possible modulating manners and mechanisms on stem cell differentiation. In present review, we summarize recent progress in the regulating potential of various nanomaterials on stem cell differentiation and discuss the possible cell uptake, biological interaction and underlying mechanisms.
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Affiliation(s)
- Min Wei
- Liaoning Provincial Center for Clinical Research on Neurological Diseases, The First Affiliated Hospital, Dalian Medical University, Dalian, 116021, People's Republic of China.,Liaoning Provincial Key Laboratory for Research on the Pathogenic Mechanisms of Neurological Diseases, The First Affiliated Hospital, Dalian Medical University, Dalian, 116021, People's Republic of China
| | - Song Li
- Liaoning Provincial Center for Clinical Research on Neurological Diseases, The First Affiliated Hospital, Dalian Medical University, Dalian, 116021, People's Republic of China.,Liaoning Provincial Key Laboratory for Research on the Pathogenic Mechanisms of Neurological Diseases, The First Affiliated Hospital, Dalian Medical University, Dalian, 116021, People's Republic of China
| | - Weidong Le
- Liaoning Provincial Center for Clinical Research on Neurological Diseases, The First Affiliated Hospital, Dalian Medical University, Dalian, 116021, People's Republic of China. .,Liaoning Provincial Key Laboratory for Research on the Pathogenic Mechanisms of Neurological Diseases, The First Affiliated Hospital, Dalian Medical University, Dalian, 116021, People's Republic of China. .,Collaborative Innovation Center for Brain Science, The First Affiliated Hospital, Dalian Medical University, Dalian, 116021, People's Republic of China.
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15
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Jahan K, Tabrizian M. Composite biopolymers for bone regeneration enhancement in bony defects. Biomater Sci 2017; 4:25-39. [PMID: 26317131 DOI: 10.1039/c5bm00163c] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
For the past century, various biomaterials have been used in the treatment of bone defects and fractures. Their role as potential substitutes for human bone grafts increases as donors become scarce. Metals, ceramics and polymers are all materials that confer different advantages to bone scaffold development. For instance, biocompatibility is a highly desirable property for which naturally-derived polymers are renowned. While generally applied separately, the use of biomaterials, in particular natural polymers, is likely to change, as biomaterial research moves towards mixing different types of materials in order to maximize their individual strengths. This review focuses on osteoconductive biocomposite scaffolds which are constructed around natural polymers and their performance at the in vitro/in vivo stages and in clinical trials.
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Affiliation(s)
- K Jahan
- Faculty of Dentistry, McGill University, 3640 University Street, Montreal, QC H3A 2B2, Canada.
| | - M Tabrizian
- Faculty of Dentistry, McGill University, 3640 University Street, Montreal, QC H3A 2B2, Canada. and Biomedical Engineering, Duff Medical Building, Room 313, McGill, Montreal, H3A 2B4, Canada
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16
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Rumian Ł, Tiainen H, Cibor U, Krok-Borkowicz M, Brzychczy-Włoch M, Haugen HJ, Pamuła E. Ceramic scaffolds enriched with gentamicin loaded poly(lactide- co -glycolide) microparticles for prevention and treatment of bone tissue infections. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:856-64. [DOI: 10.1016/j.msec.2016.07.065] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 07/06/2016] [Accepted: 07/22/2016] [Indexed: 02/01/2023]
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17
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Liu H, Li W, Liu C, Tan J, Wang H, Hai B, Cai H, Leng HJ, Liu ZJ, Song CL. Incorporating simvastatin/poloxamer 407 hydrogel into 3D-printed porous Ti
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Al
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V scaffolds for the promotion of angiogenesis, osseointegration and bone ingrowth. Biofabrication 2016; 8:045012. [DOI: 10.1088/1758-5090/8/4/045012] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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18
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Fan X, Chen K, He X, Li N, Huang J, Tang K, Li Y, Wang F. Nano-TiO 2 /collagen-chitosan porous scaffold for wound repairing. Int J Biol Macromol 2016; 91:15-22. [DOI: 10.1016/j.ijbiomac.2016.05.094] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 05/25/2016] [Accepted: 05/26/2016] [Indexed: 11/25/2022]
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19
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Naik K, Chandran VG, Rajashekaran R, Waigaonkar S, Kowshik M. Mechanical properties, biological behaviour and drug release capability of nano TiO2-HAp-Alginate composite scaffolds for potential application as bone implant material. J Biomater Appl 2016; 31:387-99. [DOI: 10.1177/0885328216661219] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Nanocomposite scaffolds of TiO2 and hydroxyapatite nanoparticles with alginate as the binding agent were fabricated using the freeze drying technique. TiO2, hydroxyapatite and alginate were used in the ratio of 1:1:4. The scaffolds were characterized using X-ray diffraction, fourier transform infrared spectroscopy, and scanning electron microscopy. The biocompatibility of the scaffolds was evaluated using cell adhesion and MTT assay on osteosarcoma (MG-63) cells. Scanning electron microscopy analysis revealed that cells adhered to the surface of the scaffolds with good spreading. The mechanical properties of the scaffolds were investigated using dynamic mechanical analysis. The swelling ability, porosity, in vitro degradation, and biomineralization of the scaffolds were also evaluated. The results indicated controlled swelling, limited degradation, and enhanced biomineralization. Further, drug delivery studies of the scaffolds using the chemotherapeutic drug methotrexate exhibited an ideal drug release profile. These scaffolds are proposed as potential candidates for bone tissue engineering and drug delivery applications.
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Affiliation(s)
- Kshipra Naik
- Department of Biological Sciences, BITS Pilani K K Birla Goa Campus, Zuarinagar, Goa, India
| | - V Girish Chandran
- Department of Mechanical Engineering, BITS Pilani K K Birla Goa Campus, Zuarinagar, Goa, India
| | - Raghavan Rajashekaran
- Department of Biological Sciences, BITS Pilani K K Birla Goa Campus, Zuarinagar, Goa, India
| | - Sachin Waigaonkar
- Department of Mechanical Engineering, BITS Pilani K K Birla Goa Campus, Zuarinagar, Goa, India
| | - Meenal Kowshik
- Department of Biological Sciences, BITS Pilani K K Birla Goa Campus, Zuarinagar, Goa, India
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20
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Kheirallah M, Almeshaly H. Simvastatin, dosage and delivery system for supporting bone regeneration, an update review. JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY MEDICINE AND PATHOLOGY 2016. [DOI: 10.1016/j.ajoms.2015.10.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Lee JB, Kim JE, Balikov DA, Bae MS, Heo DN, Lee D, Rim HJ, Lee DW, Sung HJ, Kwon IK. Poly(l-Lactic Acid)/Gelatin Fibrous Scaffold Loaded with Simvastatin/Beta-Cyclodextrin-Modified Hydroxyapatite Inclusion Complex for Bone Tissue Regeneration. Macromol Biosci 2016; 16:1027-38. [PMID: 26996294 DOI: 10.1002/mabi.201500450] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/28/2016] [Indexed: 01/25/2023]
Abstract
Recently, the application of nanostructured materials in the field of tissue engineering has garnered attention to mediate treatment and regeneration of bone defects. In this study, poly(l-lactic acid) (PLLA)/gelatin (PG) fibrous scaffolds are fabricated and β-cyclodextrin (βCD) grafted nano-hydroxyapatite (HAp) is coated onto the fibrous scaffold surface via an interaction between βCD and adamantane. Simvastatin (SIM), which is known to promote osteoblast viability and differentiation, is loaded into the remaining βCD. The specimen morphologies are characterized by scanning electron microscopy. The release profile of SIM from the drug loaded scaffold is also evaluated. In vitro proliferation and osteogenic differentiation of human adipose derived stem cells on SIM/HAp coated PG composite scaffolds is characterized by alkaline phosphatase (ALP) activity, mineralization (Alizarin Red S staining), and real time Polymerase chain reaction (PCR). The scaffolds are then implanted into rabbit calvarial defects and analyzed by microcomputed tomography for bone formation after four and eight weeks. These results demonstrate that SIM loaded PLLA/gelatin/HAp-(βCD) scaffolds promote significantly higher ALP activity, mineralization, osteogenic gene expression, and bone regeneration than control scaffolds. This suggests the potential application of this material toward bone tissue engineering.
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Affiliation(s)
- Jung Bok Lee
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - Ji Eun Kim
- Department of Maxillofacial Biomedical Engineering and Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Daniel A Balikov
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - Min Soo Bae
- Department of Maxillofacial Biomedical Engineering and Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Dong Nyoung Heo
- Department of Maxillofacial Biomedical Engineering and Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Donghyun Lee
- Department of Maxillofacial Biomedical Engineering and Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Hyun Joon Rim
- Department of Maxillofacial Biomedical Engineering and Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Deok-Won Lee
- Department of Oral and Maxillofacial Surgery, Kyung Hee University Dental Hospital at Gang-dong, Seoul, 05278, Republic of Korea
| | - Hak-Joon Sung
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, 37235, USA
| | - Il Keun Kwon
- Department of Maxillofacial Biomedical Engineering and Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, 02447, Republic of Korea
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22
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Jo JH, Choi SW, Choi JW, Paik DH, Kang SS, Kim SE, Jeon YC, Huh JB. Effects of different rhBMP-2 release profiles in defect areas around dental implants on bone regeneration. ACTA ACUST UNITED AC 2015; 10:045007. [PMID: 26165987 DOI: 10.1088/1748-6041/10/4/045007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study was undertaken to evaluate the effects of different rhBMP-2 release profiles in defect areas around dental implants on osseointegration and bone regeneration. Four beagle dogs (13-15 kg) were used. The defect was 3 mm deep and there was a 1 mm gap around the implant. Each of the four implants was installed on the right and left mandibular alveolar ridges. After the implants were placed, experimental groups were applied to the surrounding defect area (n = 8 in each group, the control group was not treated). The inject group was injected with rhBMP-2 solution directly. In the gel group, rhBMP-2 mixed with a hydrogel matrix was applied. In the particle-gel group, rhBMP-2-embedded poly(lactic-co-glycolic acid)(PLGA) microparticles mixed with hydrogel matrix were applied to maintain consistent release. Sequential fluorescent labeling and histological analysis were performed to evaluate the new bone formation and osseointegration in the defect area. In the control group, larger marginal bone loss was detected as compared with the other groups (P < 0.05). The gel group showed significantly higher levels of BIC in the buccal and lingual defect areas compared with the other groups (P < 0.05). New-bone percentages in the inject and gel groups formed more new bone than in the particle-gel and control groups (P < 0.05). Despite the limitations of this study, the use of only hydrogel, which allows early release of rhBMP-2 followed by consistent extended release, showed better bone formation and osseointegration than simple injection or PLGA microparticles with hydrogel matrix.
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Affiliation(s)
- Jae Ho Jo
- Department of Prosthodontics, Dental Research Institute, Biomedical Research Institute, School of Dentistry, Pusan National University, YangSan, 676-870, Korea
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23
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Moshiri A, Shahrezaee M, Shekarchi B, Oryan A, Azma K. Three-Dimensional Porous Gelapin-Simvastatin Scaffolds Promoted Bone Defect Healing in Rabbits. Calcif Tissue Int 2015; 96:552-64. [PMID: 25804980 DOI: 10.1007/s00223-015-9981-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 03/03/2015] [Indexed: 12/11/2022]
Abstract
Treatment of large bone defects (LBDs) is technically demanding. Tissue engineering is an option. A bioactive graft may be produced by combining tissue scaffolds and healing promotive factors in order to accelerate bone repair. We investigated the role of Simvastatin (Sim)-embedded porous Gelapin (Gel) scaffold on experimental bone healing. At first, the effectiveness of different concentrations of Gel and Sim powders was investigated in an experimentally induced femoral hole model in rabbits (n = 6) for 30 days. Then bone bioactive grafts were produced by combination of the effective concentrations of Gel, Sim, and Genipin. The bioimplants were subcutaneously tested in a rabbit model (n = 9) to determine their biocompatibility and biodegradability for 10-30 days. Finally, a large radial bone defect model was produced in rabbits (n = 20), and the bioimplants were inserted in the defects. The untreated and autograft-treated bone defects were served as controls. The animals were euthanized after 30 and 60 days of bone injury. The bone samples were evaluated by radiography, three-dimensional CT scan, bone densitometry, histopathology, and nano-indentation. At a concentration of 5 mg/hole, Sim closed the femoral bone holes after 30 days, while in the defect, autograft, and Gel groups, the holes were open. Both the Gel and Gel-Sim scaffolds were biocompatible and biodegradable. Subcutaneously, the Gel-Sim scaffold was replaced with the newly regenerated ectopic bone after 30 days. After implantation of the Gel-Sim scaffold in the radial bone defects, the scaffold was completely replaced with new woven bone after 30 days which was then matured and remodeled into a cortical bone after 60 days. Sixty days after bone injury, the Gel-Sim-treated defects had significantly higher bone volume, matrix mineralization, elastic modulus, and contact hardness when compared to the controls. The Gel-Sim scaffold may be a suitable option in managing LBDs.
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Affiliation(s)
- Ali Moshiri
- Department of Orthopedic Surgery, School of Medicine, AJA University of Medical Science, Tehran, Iran
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24
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Pullisaar H, Verket A, Szoke K, Tiainen H, Haugen HJ, Brinchmann JE, Reseland JE, Østrup E. Alginate hydrogel enriched with enamel matrix derivative to target osteogenic cell differentiation in TiO2 scaffolds. J Tissue Eng 2015; 6:2041731415575870. [PMID: 26090086 PMCID: PMC4456326 DOI: 10.1177/2041731415575870] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 02/09/2015] [Indexed: 01/05/2023] Open
Abstract
The purpose of bone tissue engineering is to employ scaffolds, cells, and growth factors to facilitate healing of bone defects. The aim of this study was to assess the viability and osteogenic differentiation of primary human osteoblasts and adipose tissue–derived mesenchymal stem cells from various donors on titanium dioxide (TiO2) scaffolds coated with an alginate hydrogel enriched with enamel matrix derivative. Cells were harvested for quantitative reverse transcription polymerase chain reaction on days 14 and 21, and medium was collected on days 2, 14, and 21 for protein analyses. Neither coating with alginate hydrogel nor alginate hydrogel enriched with enamel matrix derivative induced a cytotoxic response. Enamel matrix derivative–enriched alginate hydrogel significantly increased the expression of osteoblast markers COL1A1, TNFRSF11B, and BGLAP and secretion of osteopontin in human osteoblasts, whereas osteogenic differentiation of human adipose tissue–derived mesenchymal stem cells seemed unaffected by enamel matrix derivative. The alginate hydrogel coating procedure may have potential for local delivery of enamel matrix derivative and other stimulatory factors for use in bone tissue engineering.
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Affiliation(s)
- Helen Pullisaar
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Anders Verket
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Krisztina Szoke
- Institute of Immunology, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Hanna Tiainen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Håvard J Haugen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Jan E Brinchmann
- Institute of Immunology, Oslo University Hospital Rikshospitalet, Oslo, Norway
- Norwegian Center for Stem Cell Research, Department of Biochemistry, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Janne E Reseland
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Esben Østrup
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
- Norwegian Center for Stem Cell Research, Department of Biochemistry, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
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25
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Therapeutic foam scaffolds incorporating biopolymer-shelled mesoporous nanospheres with growth factors. Acta Biomater 2014; 10:2612-21. [PMID: 24530558 DOI: 10.1016/j.actbio.2014.02.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 01/29/2014] [Accepted: 02/03/2014] [Indexed: 12/12/2022]
Abstract
A novel therapeutic scaffolding system of engineered nanocarriers within a foam matrix for the long-term and sequential delivery of growth factors is reported. Mesoporous silica nanospheres were first functionalized to have an enlarged mesopore size (12.2nm) and aminated surface, which was then shelled by a biopolymer, poly(lactic acid) (PLA) or poly(ethylene glycol) (PEG), via electrospraying. The hybrid nanocarrier was subsequently combined with collagen to produce foam scaffolds. Bovine serum albumin (BSA), used as a model protein, was effectively loaded within the enlarged nanospheres. The biopolymer shell substantially prolonged the release period of BSA (2-3weeks from shelled nanospheres vs. within 1week from bare nanospheres), and the release rate was highly dependent on the shell composition (PEG>PLA). Collagen foam scaffolding of the shelled nanocarrier further slowed down the protein release, while enabling the incorporation of a rapidly releasing protein, which is effective for sequential protein delivery. Acidic fibroblast growth factor (aFGF), loaded onto the shelled-nanocarrier scaffolds, was released over a month at a highly sustainable rate, profiling a release pattern similar to that of BSA. The biological activity of the aFGF was evidenced by the significant proliferation of osteoblastic precursor cells in the aFGF-releasing scaffolds. Furthermore, the aFGF-delivering scaffolds implanted in rat subcutaneous tissue for 2weeks showed a substantially enhanced invasion of fibroblasts with a homogeneous population. Taken together, it is concluded that the biopolymer encapsulation of mesoporous nanospheres effectively prolongs the release of growth factors over weeks to a month, providing a nanocarrier platform for a long-term growth factor delivery. Moreover, the foam scaffolding of the nanocarrier system is a potential therapeutic three-dimensional matrix for cell culture and tissue engineering.
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26
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Simvastatin coating of TiO2 scaffold induces osteogenic differentiation of human adipose tissue-derived mesenchymal stem cells. Biochem Biophys Res Commun 2014; 447:139-44. [DOI: 10.1016/j.bbrc.2014.03.133] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 03/25/2014] [Indexed: 01/18/2023]
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