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Xu H, Yan S, Gerhard E, Xie D, Liu X, Zhang B, Shi D, Ameer GA, Yang J. Citric Acid: A Nexus Between Cellular Mechanisms and Biomaterial Innovations. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2402871. [PMID: 38801111 PMCID: PMC11309907 DOI: 10.1002/adma.202402871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 05/07/2024] [Indexed: 05/29/2024]
Abstract
Citrate-based biodegradable polymers have emerged as a distinctive biomaterial platform with tremendous potential for diverse medical applications. By harnessing their versatile chemistry, these polymers exhibit a wide range of material and bioactive properties, enabling them to regulate cell metabolism and stem cell differentiation through energy metabolism, metabonegenesis, angiogenesis, and immunomodulation. Moreover, the recent US Food and Drug Administration (FDA) clearance of the biodegradable poly(octamethylene citrate) (POC)/hydroxyapatite-based orthopedic fixation devices represents a translational research milestone for biomaterial science. POC joins a short list of biodegradable synthetic polymers that have ever been authorized by the FDA for use in humans. The clinical success of POC has sparked enthusiasm and accelerated the development of next-generation citrate-based biomaterials. This review presents a comprehensive, forward-thinking discussion on the pivotal role of citrate chemistry and metabolism in various tissue regeneration and on the development of functional citrate-based metabotissugenic biomaterials for regenerative engineering applications.
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Affiliation(s)
- Hui Xu
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Su Yan
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Ethan Gerhard
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Denghui Xie
- Department of Histology and Embryology, School of Basic Medical Sciences, Department of Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, 510515, P. R. China
- Academy of Orthopedics of Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, 510630, P. R. China
| | - Xiaodong Liu
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, 310030, P. R. China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310030, P. R. China
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, 310030, P. R. China
- Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310030, P. R. China
| | - Bing Zhang
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, 310030, P. R. China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310030, P. R. China
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, 310030, P. R. China
- Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310030, P. R. China
| | - Dongquan Shi
- Division of Sports Medicine and Adult Reconstructive Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, Jiangsu, 210008, P. R. China
| | - Guillermo A Ameer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Jian Yang
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, 310030, P. R. China
- Biomedical Engineering Program, School of Engineering, Westlake University, Hangzhou, Zhejiang, 310030, P. R. China
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Cichoń E, Kosowska K, Pańtak P, Czechowska JP, Zima A, Ślósarczyk A. Physicochemical Properties of Inorganic and Hybrid Hydroxyapatite-Based Granules Modified with Citric Acid or Polyethylene Glycol. Molecules 2024; 29:2018. [PMID: 38731508 PMCID: PMC11085481 DOI: 10.3390/molecules29092018] [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: 03/09/2024] [Revised: 04/07/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
This study delves into the physicochemical properties of inorganic hydroxyapatite (HAp) and hybrid hydroxyapatite-chitosan (HAp-CTS) granules, also gold-enriched, which can be used as aggregates in biomicroconcrete-type materials. The impact of granules' surface modifications with citric acid (CA) or polyethylene glycol (PEG) was assessed. Citric acid modification induced increased specific surface area and porosity in inorganic granules, contrasting with reduced parameters in hybrid granules. PEG modification resulted in a slight increase in specific surface area for inorganic granules and a substantial rise for hybrid granules with gold nanoparticles. Varied effects on open porosity were observed based on granule type. Microstructural analysis revealed increased roughness for inorganic granules post CA modification, while hybrid granules exhibited smoother surfaces. Novel biomicroconcretes, based on α-tricalcium phosphate (α-TCP) calcium phosphate cement and developed granules as aggregates within, were evaluated for compressive strength. Compressive strength assessments showcased significant enhancement with PEG modification, emphasizing its positive impact. Citric acid modification demonstrated variable effects, depending on granule composition. The incorporation of gold nanoparticles further enriched the multifaceted approach to enhancing calcium phosphate-based biomaterials for potential biomedical applications. This study demonstrates the pivotal role of surface modifications in tailoring the physicochemical properties of granules, paving the way for advanced biomicroconcretes with improved compressive strength for diverse biomedical applications.
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Affiliation(s)
- Ewelina Cichoń
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Karolina Kosowska
- Solaris National Synchrotron Radiation Centre, Jagiellonian University, Czerwone Maki 98, 30-392 Krakow, Poland;
| | - Piotr Pańtak
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza Av. 30, 30-058 Krakow, Poland; (P.P.); (J.P.C.); (A.Z.); (A.Ś.)
| | - Joanna P. Czechowska
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza Av. 30, 30-058 Krakow, Poland; (P.P.); (J.P.C.); (A.Z.); (A.Ś.)
| | - Aneta Zima
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza Av. 30, 30-058 Krakow, Poland; (P.P.); (J.P.C.); (A.Z.); (A.Ś.)
| | - Anna Ślósarczyk
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza Av. 30, 30-058 Krakow, Poland; (P.P.); (J.P.C.); (A.Z.); (A.Ś.)
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Wang H, Duan C, Keate RL, Ameer GA. Panthenol Citrate Biomaterials Accelerate Wound Healing and Restore Tissue Integrity. Adv Healthc Mater 2023; 12:e2301683. [PMID: 37327023 DOI: 10.1002/adhm.202301683] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Indexed: 06/17/2023]
Abstract
Impaired wound healing is a common complication for diabetic patients and effective diabetic wound management remains a clinical challenge. Furthermore, a significant problem that contributes to patient morbidity is the suboptimal quality of healed skin, which often leads to reoccurring chronic skin wounds. Herein, a novel compound and biomaterial building block, panthenol citrate (PC), is developed. It has interesting fluorescence and absorbance properties, and it is shown that PC can be used in soluble form as a wash solution and as a hydrogel dressing to address impaired wound healing in diabetes. PC exhibits antioxidant, antibacterial, anti-inflammatory, and pro-angiogenic properties, and promotes keratinocyte and dermal fibroblast migration and proliferation. When applied in a splinted excisional wound diabetic rodent model, PC improves re-epithelialization, granulation tissue formation, and neovascularization. It also reduces inflammation and oxidative stress in the wound environment. Most importantly, it improves the regenerated tissue quality with enhanced mechanical strength and electrical properties. Therefore, PC could potentially improve wound care management for diabetic patients and play a beneficial role in other tissue regeneration applications.
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Affiliation(s)
- Huifeng Wang
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Chongwen Duan
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Rebecca L Keate
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Guillermo A Ameer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
- International Institute for Nanotechnology, Northwestern University, Evanston, IL, 60208, USA
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Wang M, Xu P, Lei B. Engineering multifunctional bioactive citrate-based biomaterials for tissue engineering. Bioact Mater 2023; 19:511-537. [PMID: 35600971 PMCID: PMC9096270 DOI: 10.1016/j.bioactmat.2022.04.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/22/2022] [Accepted: 04/24/2022] [Indexed: 12/21/2022] Open
Abstract
Developing bioactive biomaterials with highly controlled functions is crucial to enhancing their applications in regenerative medicine. Citrate-based polymers are the few bioactive polymer biomaterials used in biomedicine because of their facile synthesis, controllable structure, biocompatibility, biomimetic viscoelastic mechanical behavior, and functional groups available for modification. In recent years, various multifunctional designs and biomedical applications, including cardiovascular, orthopedic, muscle tissue, skin tissue, nerve and spinal cord, bioimaging, and drug or gene delivery based on citrate-based polymers, have been extensively studied, and many of them have good clinical application potential. In this review, we summarize recent progress in the multifunctional design and biomedical applications of citrate-based polymers. We also discuss the further development of multifunctional citrate-based polymers with tailored properties to meet the requirements of various biomedical applications. Multifunctional bioactive citrate-based biomaterials have broad applications in regenerative medicine. Recent advances in multifunctional design and biomedical applications of citate-based polymers are summarized. Future challenge of citrate-based polymers in various biomedical applications are discussed.
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Conrad B, Yang F. Hydroxyapatite-coated gelatin microribbon scaffolds induce rapid endogenous cranial bone regeneration in vivo. BIOMATERIALS ADVANCES 2022; 140:213050. [PMID: 35917686 DOI: 10.1016/j.bioadv.2022.213050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/25/2022] [Accepted: 07/24/2022] [Indexed: 06/15/2023]
Abstract
Hydroxyapatite (HA) has a composition similar to mineral bone and has been used for coating macroporous scaffolds to enhance bone formation. However, previous macroporous scaffolds did not support minimally invasive delivery. Our lab has reported on gelatin-based microribbon (μRB) shaped hydrogels, which combine injectability with macroporosity and support cranial bone formation in an immunocompromised mouse model. However, gelatin alone was not sufficient to support cranial bone formation in immunocompetent animals. To overcome this challenge, here we evaluated two methods to incorporate HA into gelatin μRB scaffolds using either modified simulated body fluid (mSBF) or commercially available HA nanoparticles (HAnp). HA incorporation and distribution were characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy. While both methods enhanced MSC osteogenesis and mineralization, the mSBF method led to undesirable reduction in mechanical properties. HAnp-coated μRB scaffolds were further evaluated in an immunocompetent mouse cranial defect model. Acellular HAnp-coated gelatin μRB scaffolds induced rapid and robust endogenous cranial bone regeneration as shown by MicroCT imaging and histology. Co-delivery with exogenous MSCs led to later bone resorption accompanied by increased osteoclast activity. In summary, our results demonstrate the promise of gelatin μRBs with HAnps as a promising therapy for cranial bone regeneration without the need for exogenous cells or growth factors.
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Affiliation(s)
- Bogdan Conrad
- Program of Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, 240 Pasteur Dr., Biomedical Innovation Building 1200, Palo Alto, CA 94304, United States of America.
| | - Fan Yang
- Departments of Orthopaedic Surgery and Bioengineering Stanford University, 240 Pasteur Dr., Biomedical Innovation Building 1200, Palo Alto, CA 94304, United States of America.
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Yusoff NISM, Tham WH, Wahit MU, Abdul Kadir MR, Wong T. The effect of hydroxyapatite filler on biodegradable poly(sorbitol sebacate malate) composites. J Appl Polym Sci 2022. [DOI: 10.1002/app.52862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Noor Izyan Syazana Mohd Yusoff
- Advanced Membrane Technology Research Centre (AMTEC) Universiti Teknologi Malaysia (UTM) Johor Bahru Johor Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering Universiti Teknologi Malaysia (UTM) Johor Bahru Johor Malaysia
| | - Weng Hong Tham
- School of Chemical and Energy Engineering, Faculty of Engineering Universiti Teknologi Malaysia (UTM) Johor Bahru Johor Malaysia
| | - Mat Uzir Wahit
- School of Chemical and Energy Engineering, Faculty of Engineering Universiti Teknologi Malaysia (UTM) Johor Bahru Johor Malaysia
- Centre for Advanced Composite Materials (CACM) Universiti Teknologi Malaysia (UTM) Johor Bahru Johor Malaysia
| | - Mohammed Rafiq Abdul Kadir
- School of Biomedical Engineering and Health Sciences, Faculty of Engineering Universiti Teknologi Malaysia (UTM) Johor Bahru Johor Malaysia
| | - Tuck‐Whye Wong
- Advanced Membrane Technology Research Centre (AMTEC) Universiti Teknologi Malaysia (UTM) Johor Bahru Johor Malaysia
- School of Biomedical Engineering and Health Sciences, Faculty of Engineering Universiti Teknologi Malaysia (UTM) Johor Bahru Johor Malaysia
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Koper F, Swiergosz T, Żaba A, Flis A, Trávníčková M, Bačáková L, Pamuła E, Bogdał D, Kasprzyk WP. Advancements in structure-property correlation studies of cross-linked citric acid-based elastomers from the perspective of medical application. J Mater Chem B 2021; 9:6425-6440. [PMID: 34323912 DOI: 10.1039/d1tb01078f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Herein, a renewed prominence towards the synthesis of poly(alkylene citrate) (PAC) biomaterials and their detailed chemical, structural and mechanical characterization has been reported. Based on the modifications to the PAC synthesis protocol introduced in this study, the fabrication process was significantly streamlined, the reaction yields were increased, and the homogeneity of the final materials was found to be substantially improved. Comprehensive nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry (MS) studies of the fabricated prepolymers shed light on the mechanism of the PAC cross-linking process and supported the design of materials with enhanced biocompatibility. Therefore, the initial molar ratio of the reagents involved in the synthesis of PAC materials was found to be pivotal to both the biological and mechanical properties of the final products. Moreover, cell viability and proliferation assays revealed enhanced biocompatibility of the materials formulated with a molar ratio of diol over citric acid (3 : 2 mol/mol) in comparison to the most commonly described 1 : 1 analogue without affecting the possibility of further functionalization. Furthermore, this work creates a new paradigm for prospective studies on the properties of modified PAC materials and their application in medicine and tissue engineering.
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Affiliation(s)
- Filip Koper
- Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland.
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Terreros A, Daye RM. Prospective Evaluation of a Citrate-Based Biomaterial Wedge for a Modified Maquet Procedure in the Treatment of Cranial Cruciate Ligament Rupture in Dogs. Vet Comp Orthop Traumatol 2020; 34:137-143. [PMID: 33157561 DOI: 10.1055/s-0040-1719058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The aim of this study was to describe short- and mid-term outcomes, complications, implant bioabsorption and owner satisfaction for a modified Maquet procedure (MMP) in which a novel bioabsorbable citrate-based implant is used as the wedge component to treat cranial cruciate ligament rupture in client-owned dogs. STUDY DESIGN Prospective clinical study of dogs (n = 13) undergoing MMP (n = 15). Intraoperative complications, postoperative complications, clinical follow-up using a 5-point lameness score and radiographs at 8 weeks and 6 months postoperatively were obtained. Mid-term outcome was assessed via physical examination, radiographs, canine orthopaedic index and owner satisfaction questionnaires. RESULTS No catastrophic complications occurred. Major complications occurred in 3/15 stifles. All were surgical site infections and one case required implant removal. Minor complications occurred in 9/15 stifles. Non-displaced cortical hinge fractures were the most common minor complication, and these occurred intraoperatively (4/15) or postoperatively (2/15). Three dogs achieved full function, eight dogs acceptable function and the outcome was unacceptable in two dogs. Most owners were satisfied with the procedure (11/13). Complete implant bioabsorption was not confirmed on mid-term radiographs. CONCLUSION The described MMP with a citrate-based implant can produce satisfactory mid-term results. However, the long-term outcome of this procedure must be evaluated and technical modifications need to be implemented prior to larger-scale use of this implant.
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Affiliation(s)
- Alex Terreros
- Ohio Veterinary Surgery and Neurology, Metropolitan Veterinary Hospital, Akron, Ohio, United States
| | - R Mark Daye
- Ohio Veterinary Surgery and Neurology, Metropolitan Veterinary Hospital, Akron, Ohio, United States
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Huang YH, Jakus AE, Jordan SW, Dumanian Z, Parker K, Zhao L, Patel PK, Shah RN. Three-Dimensionally Printed Hyperelastic Bone Scaffolds Accelerate Bone Regeneration in Critical-Size Calvarial Bone Defects. Plast Reconstr Surg 2019; 143:1397-1407. [PMID: 31033821 DOI: 10.1097/prs.0000000000005530] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Autologous bone grafts remain the gold standard for craniofacial reconstruction despite limitations of donor-site availability and morbidity. A myriad of commercial bone substitutes and allografts are available, yet no product has gained widespread use because of inferior clinical outcomes. The ideal bone substitute is both osteoconductive and osteoinductive. Craniofacial reconstruction often involves irregular three-dimensional defects, which may benefit from malleable or customizable substrates. "Hyperelastic Bone" is a three-dimensionally printed synthetic scaffold, composed of 90% by weight hydroxyapatite and 10% by weight poly(lactic-co-glycolic acid), with inherent bioactivity and porosity to allow for tissue integration. This study examines the capacity of Hyperelastic Bone for bone regeneration in a critical-size calvarial defect. METHODS Eight-millimeter calvarial defects in adult male Sprague-Dawley rats were treated with three-dimensionally printed Hyperelastic Bone, three-dimensionally printed Fluffy-poly(lactic-co-glycolic acid) without hydroxyapatite, autologous bone (positive control), or left untreated (negative control). Animals were euthanized at 8 or 12 weeks postoperatively and specimens were analyzed for new bone formation by cone beam computed tomography, micro-computed tomography, and histology. RESULTS The mineralized bone volume-to-total tissue volume fractions for the Hyperelastic Bone cohort at 8 and 12 weeks were 74.2 percent and 64.5 percent of positive control bone volume/total tissue, respectively (p = 0.04). Fluffy-poly(lactic-co-glycolic acid) demonstrated little bone formation, similar to the negative control. Histologic analysis of Hyperelastic Bone scaffolds revealed fibrous tissue at 8 weeks, and new bone formation surrounding the scaffold struts by 12 weeks. CONCLUSION Findings from our study suggest that Hyperelastic Bone grafts are effective for bone regeneration, with significant potential for clinical translation.
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Affiliation(s)
- Yu-Hui Huang
- From Shriners Hospitals for Children-Chicago; The Craniofacial Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Illinois Health; and the Department of Materials Science and Engineering, the Simpson Querrey Institute for BioNanotechnology, the Department of Surgery, Division of Plastic and Reconstructive Surgery, the Department of Biomedical Engineering, and the Division of Organ Transplantation, Department of Surgery, Northwestern University
| | - Adam E Jakus
- From Shriners Hospitals for Children-Chicago; The Craniofacial Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Illinois Health; and the Department of Materials Science and Engineering, the Simpson Querrey Institute for BioNanotechnology, the Department of Surgery, Division of Plastic and Reconstructive Surgery, the Department of Biomedical Engineering, and the Division of Organ Transplantation, Department of Surgery, Northwestern University
| | - Sumanas W Jordan
- From Shriners Hospitals for Children-Chicago; The Craniofacial Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Illinois Health; and the Department of Materials Science and Engineering, the Simpson Querrey Institute for BioNanotechnology, the Department of Surgery, Division of Plastic and Reconstructive Surgery, the Department of Biomedical Engineering, and the Division of Organ Transplantation, Department of Surgery, Northwestern University
| | - Zari Dumanian
- From Shriners Hospitals for Children-Chicago; The Craniofacial Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Illinois Health; and the Department of Materials Science and Engineering, the Simpson Querrey Institute for BioNanotechnology, the Department of Surgery, Division of Plastic and Reconstructive Surgery, the Department of Biomedical Engineering, and the Division of Organ Transplantation, Department of Surgery, Northwestern University
| | - Kelly Parker
- From Shriners Hospitals for Children-Chicago; The Craniofacial Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Illinois Health; and the Department of Materials Science and Engineering, the Simpson Querrey Institute for BioNanotechnology, the Department of Surgery, Division of Plastic and Reconstructive Surgery, the Department of Biomedical Engineering, and the Division of Organ Transplantation, Department of Surgery, Northwestern University
| | - Linping Zhao
- From Shriners Hospitals for Children-Chicago; The Craniofacial Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Illinois Health; and the Department of Materials Science and Engineering, the Simpson Querrey Institute for BioNanotechnology, the Department of Surgery, Division of Plastic and Reconstructive Surgery, the Department of Biomedical Engineering, and the Division of Organ Transplantation, Department of Surgery, Northwestern University
| | - Pravin K Patel
- From Shriners Hospitals for Children-Chicago; The Craniofacial Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Illinois Health; and the Department of Materials Science and Engineering, the Simpson Querrey Institute for BioNanotechnology, the Department of Surgery, Division of Plastic and Reconstructive Surgery, the Department of Biomedical Engineering, and the Division of Organ Transplantation, Department of Surgery, Northwestern University
| | - Ramille N Shah
- From Shriners Hospitals for Children-Chicago; The Craniofacial Center, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Illinois Health; and the Department of Materials Science and Engineering, the Simpson Querrey Institute for BioNanotechnology, the Department of Surgery, Division of Plastic and Reconstructive Surgery, the Department of Biomedical Engineering, and the Division of Organ Transplantation, Department of Surgery, Northwestern University
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Ng HM, Bee ST, Tin Sin L, Ratnam CT, Rahmat AR. Hydroxyapatite For Poly(α-Hydroxy Esters) Biocomposites Applications. POLYM REV 2018. [DOI: 10.1080/15583724.2018.1488729] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Hon-Meng Ng
- Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Kajang, Malaysia
| | - Soo-Tueen Bee
- Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Kajang, Malaysia
| | - Lee Tin Sin
- Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Kajang, Malaysia
| | - Chantara T. Ratnam
- Radiation Processing Technology Division, Malaysian Nuclear Agency, Kajang, Malaysia
| | - Abdul Razak Rahmat
- Department of Polymer Engineering Faculty of Chemical Engineering, Universiti Teknologi Malaysia, Johor, Malaysia
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Engineering Citric Acid-Based Porous Scaffolds for Bone Regeneration. Methods Mol Biol 2018. [PMID: 29679318 DOI: 10.1007/978-1-4939-7741-3_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Tissue engineering aims to develop scaffolds that are biocompatible and mimic the mechanical and biological properties of the target tissue as closely as possible. Here, we describe the fabrication and characterization of a biodegradable, elastomeric porous scaffold: poly(1,8-octanediol-co-citric acid) (POC) incorporated with nanoscale hydroxyapatite (HA). While this chapter focuses on the scaffold's potential for bone regeneration, POC can also be used in other tissue engineering applications requiring an elastomeric implant. Because of the relative ease with which POC can be synthesized, its mechanical properties can be tailored to mimic the structure and function of the target elastomeric tissue for enhanced tissue regeneration.
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Leach JK, Whitehead J. Materials-Directed Differentiation of Mesenchymal Stem Cells for Tissue Engineering and Regeneration. ACS Biomater Sci Eng 2018; 4:1115-1127. [PMID: 30035212 PMCID: PMC6052883 DOI: 10.1021/acsbiomaterials.6b00741] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cell-based therapies are a promising alternative to grafts and organ transplantation for treating tissue loss or damage due to trauma, malfunction, or disease. Over the past two decades, mesenchymal stem cells (MSCs) have attracted much attention as a potential cell population for use in regenerative medicine. While the proliferative capacity and multilineage potential of MSCs provide an opportunity to generate clinically relevant numbers of transplantable cells, their use in tissue regenerative applications has met with relatively limited success to date apart from secreting paracrine-acting factors to modulate the defect microenvironment. Presently, there is significant effort to engineer the biophysical properties of biomaterials to direct MSC differentiation and further expand on the potential of MSCs in tissue engineering, regeneration, and repair. Biomaterials can dictate MSC differentiation by modulating features of the substrate including composition, mechanical properties, porosity, and topography. The purpose of this review is to highlight recent approaches for guiding MSC fate using biomaterials and provide a description of the underlying characteristics that promote differentiation toward a desired phenotype.
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Affiliation(s)
- J. Kent Leach
- Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616
- Department of Orthopaedic Surgery, School of Medicine, UC Davis Medical Center, Sacramento, C 95817
| | - Jacklyn Whitehead
- Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616
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Fabrication, characterization and osteoblast responses of poly (octanediol citrate)/bioglass nanofiber composites. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018. [DOI: 10.1016/j.msec.2017.11.042] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Sani NFM, Wahit MU, Tham WH, Majid NAA. Biodegradable poly(xylitol sebacate dodecanoate)/nano-hydroxyapatite composite for potential used in biomedical applications. AIP CONFERENCE PROCEEDINGS 2018. [DOI: 10.1063/1.5047157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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15
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Zhao X, Dong R, Guo B, Ma PX. Dopamine-Incorporated Dual Bioactive Electroactive Shape Memory Polyurethane Elastomers with Physiological Shape Recovery Temperature, High Stretchability, and Enhanced C2C12 Myogenic Differentiation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:29595-29611. [PMID: 28812353 DOI: 10.1021/acsami.7b10583] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Soft tissue engineering needs elastic biomaterials not only mimicking the elasticity of soft tissue but also possessing multiple bioactivity to promote cell adhesion, proliferation, and differentiation, which still remain ongoing challenges. Herein, we synthesized a series of dopamine-incorporated dual bioactive electroactive shape memory polyurethane elastomers by combining the properties of elastomeric poly(citric acid-co-polycaprolactone) (CA-PCL) polyurethane elastomer, bioactive dopamine (DA), and electroactive aniline hexamer (AH). The chemical structures, electroactivity, conductivity, thermal properties, hydrophilicity and hydration ability, mechanical properties, and degradability of the polyurethane elastomers were systematically characterized. The elastomers showed excellent shape fixity ratio and shape recovery ability under physiological conditions. The elastomers' elongation and stress were tailored by the AH content, whereas the hydrophilicity and hydration ability of the elastomers were adjusted by the content of DA and AH, as well as the doping state of AH. The viability and proliferation results of C2C12 cells seeded on the elastomers showed their excellent cytocompatibility. Additionally, by analyzing the protein and gene level, the promotion effect on myogenic differentiation of C2C12 cells by these elastomers compared to that by control groups (PCL80 000, CA-PCL elastomer, and CA-PCL elastomer with the DA segment) was demonstrated. Furthermore, the results from subcutaneous implantation confirmed the elastomers' mild host response in vivo. These results represent that these dopamine-incorporated dual bioactive electroactive shape memory polyurethane elastomers are promising candidates for soft tissue regeneration that is sensitive to electrical signals.
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Affiliation(s)
- Xin Zhao
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
| | - Ruonan Dong
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
| | - Baolin Guo
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
| | - Peter X Ma
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
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16
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Ding Z, Han H, Fan Z, Lu H, Sang Y, Yao Y, Cheng Q, Lu Q, Kaplan DL. Nanoscale Silk-Hydroxyapatite Hydrogels for Injectable Bone Biomaterials. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16913-16921. [PMID: 28471165 DOI: 10.1021/acsami.7b03932] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Injectable hydrogel systems are important bone substitutes for regeneration because of their handling properties and the ability to fill irregular defects. Silk-hydroxyapatite composite materials with silk nanofibers in hydrogels were prepared and used as biomaterials for osteogenesis. These thixotropic silk nanofiber hydrogels and water-dispersible silk-HA nanoparticles were blended to form injectable nanoscale systems with a homogeneous distribution of a high HA content [60% (w/w)] to imitate bone niche. A modulus of ∼21 kPa was also achieved following the addition of HA in the systems, providing physical cues to induce osteodifferentiation. The composite hydrogels supported improved osteogenesis compared to that with silk nanofiber hydrogels. The newly formed bone tissue and bone defect healing were detected after implantation of the silk-HA composite hydrogels, suggesting utility for the regeneration of irregular bone defects.
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Affiliation(s)
- Zhaozhao Ding
- School of Biology and Basic Medical Sciences and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, People's Republic of China
- National Engineering Laboratory for Modern Silk, Soochow University , Suzhou 215123, People's Republic of China
| | - Hongyan Han
- School of Biology and Basic Medical Sciences and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, People's Republic of China
| | - Zhihai Fan
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University , Suzhou 215000, People's Republic of China
| | - Haijun Lu
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University , Suzhou 215000, People's Republic of China
| | - Yonghuan Sang
- National Engineering Laboratory for Modern Silk, Soochow University , Suzhou 215123, People's Republic of China
| | - Yuling Yao
- School of Biology and Basic Medical Sciences and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, People's Republic of China
| | - Qingqing Cheng
- National Engineering Laboratory for Modern Silk, Soochow University , Suzhou 215123, People's Republic of China
| | - Qiang Lu
- School of Biology and Basic Medical Sciences and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, People's Republic of China
- National Engineering Laboratory for Modern Silk, Soochow University , Suzhou 215123, People's Republic of China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University , Medford, Massachusetts 02155, United States
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Repair of critical sized cranial defects with BMP9-transduced calvarial cells delivered in a thermoresponsive scaffold. PLoS One 2017; 12:e0172327. [PMID: 28249039 PMCID: PMC5332017 DOI: 10.1371/journal.pone.0172327] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 02/02/2017] [Indexed: 12/23/2022] Open
Abstract
Large skeletal defects caused by trauma, congenital malformations, and post-oncologic resections of the calvarium present major challenges to the reconstructive surgeon. We previously identified BMP-9 as the most osteogenic BMP in vitro and in vivo. Here we sought to investigate the bone regenerative capacity of murine-derived calvarial mesenchymal progenitor cells (iCALs) transduced by BMP-9 in the context of healing critical-sized calvarial defects. To accomplish this, the transduced cells were delivered to the defect site within a thermoresponsive biodegradable scaffold consisting of poly(polyethylene glycol citrate-co-N-isopropylacrylamide mixed with gelatin (PPCN-g). A total of three treatment arms were evaluated: PPCN-g alone, PPCN-g seeded with iCALs expressing GFP, and PPCN-g seeded with iCALs expressing BMP-9. Defects treated only with PPCN-g scaffold did not statistically change in size when evaluated at eight weeks postoperatively (p = 0.72). Conversely, both animal groups treated with iCALs showed significant reductions in defect size after 12 weeks of follow-up (BMP9-treated: p = 0.0025; GFP-treated: p = 0.0042). However, H&E and trichrome staining revealed more complete osseointegration and mature bone formation only in the BMP9-treated group. These results suggest that BMP9-transduced iCALs seeded in a PPCN-g thermoresponsive scaffold is capable of inducing bone formation in vivo and is an effective means of creating tissue engineered bone for critical sized defects.
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18
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A facile and green emulsion casting method to prepare chitin nanocrystal reinforced citrate-based bioelastomer. Carbohydr Polym 2016; 157:620-628. [PMID: 27987970 DOI: 10.1016/j.carbpol.2016.10.034] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 10/08/2016] [Accepted: 10/12/2016] [Indexed: 12/22/2022]
Abstract
Chitin nanocrystal (ChiNC) is a promising reinforcing nanofiller for biomedical polymers. However, its self-aggregation characteristics caused processing difficulty in developing ChiNC-based nanocomposites. Herein, a new degradable crosslinked bioelastomer, designated as poly(1,8-octanediol-co-Pluronic F127 citrate) (POFC) was synthesized by melt polycondensation of citric acid, 1,8-octanediol, and Pluronic F127. In comparison to poly(1,8-octanediol citrate) (POC), POFC pre-polymer exhibited self-emulsifying property. Once ChiNC was introduced into the emulsion, a ChiNC stabilized Pickering emulsion was formed. Coupled with a facile green emulsion casting/evaporation method, the ChiNC ultimately reinforced ChiNC/POFC nanocomposite elastomer was fabricated. The presence of F127 segments endowed POFC with better hydrophilicity and shorter degradation time relative to POC. The incorporation of ChiNC into POFC network led to highly increased tensile modulus and strength. In vitro cytotoxicity tests indicated that the ChiNC/POFC elastomer nanocomposite had a good cytocompatibility and it appeared as a potential biomaterial for tissue engineering application.
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Ding Z, Fan Z, Huang X, Lu Q, Xu W, Kaplan DL. Silk-Hydroxyapatite Nanoscale Scaffolds with Programmable Growth Factor Delivery for Bone Repair. ACS APPLIED MATERIALS & INTERFACES 2016; 8:24463-70. [PMID: 27579921 DOI: 10.1021/acsami.6b08180] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Osteoinductive biomaterials are attractive for repairing a variety of bone defects, and biomimetic strategies are useful toward developing bone scaffolds with such capacity. Here, a multiple biomimetic design was developed to improve the osteogenesis capacity of composite scaffolds consisting of hydroxyapatite nanoparticles (HA) and silk fibroin (SF). SF nanofibers and water-dispersible HA nanoparticles were blended to prepare the nanoscaled composite scaffolds with a uniform distribution of HA with a high HA content (40%), imitating the extracellular matrix (ECM) of bone. Bone morphogenetic protein-2 (BMP-2) was loaded in the SF scaffolds and HA to tune BMP-2 release. In vitro studies showed the preservation of BMP-2 bioactivity in the composite scaffolds, and programmable sustained release was achieved through adjusting the ratio of BMP-2 loaded on SF and HA. In vitro and in vivo osteogenesis studies demonstrated that the composite scaffolds showed improved osteogenesis capacity under suitable BMP-2 release conditions, significantly better than that of BMP-2 loaded SF-HA composite scaffolds reported previously. Therefore, these biomimetic SF-HA nanoscaled scaffolds with tunable BMP-2 delivery provide preferable microenvironments for bone regeneration.
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Affiliation(s)
- Zhaozhao Ding
- School of Biology and Basic Medical Sciences & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, People's Republic of China
| | - Zhihai Fan
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University , Suzhou 215000, People's Republic of China
| | - Xiaowei Huang
- National Engineering Laboratory for Modern Silk, Soochow University , Suzhou 215123, People's Republic of China
| | - Qiang Lu
- School of Biology and Basic Medical Sciences & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, People's Republic of China
- National Engineering Laboratory for Modern Silk, Soochow University , Suzhou 215123, People's Republic of China
| | - Weian Xu
- School of Biology and Basic Medical Sciences & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, People's Republic of China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University , Medford, Massachusetts 02155, United States
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20
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Mele L, Vitiello PP, Tirino V, Paino F, De Rosa A, Liccardo D, Papaccio G, Desiderio V. Changing Paradigms in Cranio-Facial Regeneration: Current and New Strategies for the Activation of Endogenous Stem Cells. Front Physiol 2016; 7:62. [PMID: 26941656 PMCID: PMC4764712 DOI: 10.3389/fphys.2016.00062] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 02/09/2016] [Indexed: 12/20/2022] Open
Abstract
Craniofacial area represent a unique district of human body characterized by a very high complexity of tissues, innervation and vascularization, and being deputed to many fundamental function such as eating, speech, expression of emotions, delivery of sensations such as taste, sight, and earing. For this reasons, tissue loss in this area following trauma or for example oncologic resection, have a tremendous impact on patients' quality of life. In the last 20 years regenerative medicine has emerged as one of the most promising approach to solve problem related to trauma, tissue loss, organ failure etc. One of the most powerful tools to be used for tissue regeneration is represented by stem cells, which have been successfully implanted in different tissue/organs with exciting results. Nevertheless, both autologous and allogeneic stem cell transplantation raise many practical and ethical concerns that make this approach very difficult to apply in clinical practice. For this reason different cell free approaches have been developed aiming to the mobilization, recruitment, and activation of endogenous stem cells into the injury site avoiding exogenous cells implant but instead stimulating patients' own stem cells to repair the lesion. To this aim many strategies have been used including functionalized bioscaffold, controlled release of stem cell chemoattractants, growth factors, BMPs, Platelet-Rich-Plasma, and other new strategies such as ultrasound wave and laser are just being proposed. Here we review all the current and new strategies used for activation and mobilization of endogenous stem cells in the regeneration of craniofacial tissue.
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Affiliation(s)
- Luigi Mele
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Pietro Paolo Vitiello
- Medical Oncology, Dipartimento Medico-Chirurgico di Internistica Clinica e Sperimentale "F. Magrassi e A. Lanzara," Second University of Naples Naples, Italy
| | - Virginia Tirino
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Francesca Paino
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Alfredo De Rosa
- Department of Odontology and Surgery, Second University of Naples Naples, Italy
| | - Davide Liccardo
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Gianpaolo Papaccio
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Vincenzo Desiderio
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
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21
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Tran RT, Yang J, Ameer GA. Citrate-Based Biomaterials and Their Applications in Regenerative Engineering. ANNUAL REVIEW OF MATERIALS RESEARCH 2015; 45:277-310. [PMID: 27004046 PMCID: PMC4798247 DOI: 10.1146/annurev-matsci-070214-020815] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Advances in biomaterials science and engineering are crucial to translating regenerative engineering, an emerging field that aims to recreate complex tissues, into clinical practice. In this regard, citrate-based biomaterials have become an important tool owing to their versatile material and biological characteristics including unique antioxidant, antimicrobial, adhesive, and fluorescent properties. This review discusses fundamental design considerations, strategies to incorporate unique functionality, and examples of how citrate-based biomaterials can be an enabling technology for regenerative engineering.
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Affiliation(s)
- Richard T. Tran
- Department of Biomedical Engineering, Materials Research Institute, and The Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania 16802
| | - Jian Yang
- Department of Biomedical Engineering, Materials Research Institute, and The Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania 16802
| | - Guillermo A. Ameer
- Biomedical Engineering Department, Northwestern University, Evanston, Illinois 60208
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
- Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208
- Simpson Querrey Institute for Bionanotechnology, Northwestern University, Chicago, Illinois 60611
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22
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Barati D, Walters JD, Shariati SRP, Moeinzadeh S, Jabbari E. Effect of organic acids on calcium phosphate nucleation and osteogenic differentiation of human mesenchymal stem cells on peptide functionalized nanofibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:5130-5140. [PMID: 25879768 DOI: 10.1021/acs.langmuir.5b00615] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Carboxylate-rich organic acids play an important role in controlling the growth of apatite crystals and the extent of mineralization in the natural bone. The objective of this work was to investigate the effect of organic acids on calcium phosphate (CaP) nucleation on nanofiber microsheets functionalized with a glutamic acid peptide and osteogenic differentiation of human mesenchymal stem cells (hMSCs) seeded on the CaP-nucleated microsheets. High molecular weight poly(dl-lactide) (DL-PLA) was mixed with low molecular weight L-PLA conjugated with Glu-Glu-Gly-Gly-Cys peptide, and the mixture was electrospun to generate aligned nanofiber microsheets. The nanofiber microsheets were incubated in a modified simulated body fluid (mSBF) supplemented with different organic acids for nucleation and growth of CaP crystals on the nanofibers. Organic acids included citric acid (CA), hydroxycitric acid (HCA), tartaric acid (TART), malic acid (MA), ascorbic acid (AsA), and salicylic acid (SalA). HCA microsheets had the highest CaP content at 240 ± 10% followed by TART and CA with 225 ± 8% and 225 ± 10%, respectively. The Ca/P ratio and percent crystallinity of the nucleated CaP in TART microsheets was closest to that of stoichiometric hydroxyapatite. The extent of CaP nucleation and growth on the nanofiber microsheets depended on the acidic strength and number of hydrogen-bonding hydroxyl groups of the organic acids. Compressive modulus and degradation of the CaP nucleated microsheets were related to percent crystallinity and CaP content. Osteogenic differentiation of hMSCs seeded on the microsheets and cultured in osteogenic medium increased only for those microsheets nucleated with CaP by incubation in CA or AsA-supplemented mSBF. Further, only CA microsheets stimulated bone nodule formation by the seeded hMSCs.
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Affiliation(s)
- Danial Barati
- Biomimetic Materials and Tissue Engineering Laboratory, Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Joshua D Walters
- Biomimetic Materials and Tissue Engineering Laboratory, Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Seyed Ramin Pajoum Shariati
- Biomimetic Materials and Tissue Engineering Laboratory, Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Seyedsina Moeinzadeh
- Biomimetic Materials and Tissue Engineering Laboratory, Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Esmaiel Jabbari
- Biomimetic Materials and Tissue Engineering Laboratory, Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
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23
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Quan C, Tang Y, Liu Z, Rao M, Zhang W, Liang P, Wu N, Zhang C, Shen H, Jiang Q. Effect of modification degree of nanohydroxyapatite on biocompatibility and mechanical property of injectable poly(methyl methacrylate)-based bone cement. J Biomed Mater Res B Appl Biomater 2015; 104:576-84. [PMID: 25953071 DOI: 10.1002/jbm.b.33428] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 10/13/2014] [Accepted: 03/30/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Changyun Quan
- School of Engineering; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Yong Tang
- Department of Orthopedics, Sun Yat-sen Memorial Hospital; Sun Yat-sen University; Guangzhou 510120 People's Republic of China
| | - Zhenzhen Liu
- School of Engineering; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Minyu Rao
- School of Engineering; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Wei Zhang
- Department of Outpatient, First Affiliated Hospital; Sun Yat-sen University; Guangzhou 510008 People's Republic of China
| | - Peiqing Liang
- School of Engineering; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Nan Wu
- School of Engineering; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Chao Zhang
- School of Engineering; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Huiyong Shen
- Department of Orthopedics, Sun Yat-sen Memorial Hospital; Sun Yat-sen University; Guangzhou 510120 People's Republic of China
| | - Qing Jiang
- School of Engineering; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
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24
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Du Y, Ge J, Shao Y, Ma PX, Chen X, Lei B. Development of silica grafted poly(1,8-octanediol-co-citrates) hybrid elastomers with highly tunable mechanical properties and biocompatibility. J Mater Chem B 2015; 3:2986-3000. [DOI: 10.1039/c4tb02089h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By a facile polymerization, we synthesized a series of silica grafted poly (1,8-octanediol-co-citrate) (SPOC) hybrid elastomers with highly tunable physicochemical properties and bioactivities.
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Affiliation(s)
- Yuzhang Du
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
| | - Juan Ge
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
| | - Yongping Shao
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
| | - Peter X. Ma
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
- Department of Biologic and Materials Sciences
| | - Xiaofeng Chen
- National Engineering Research Center for Tissue Restoration and Reconstruction
- Guangzhou
- China
| | - Bo Lei
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
- National Engineering Research Center for Tissue Restoration and Reconstruction
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25
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Abstract
The primary goals of craniofacial reconstruction include the restoration of the form, function, and facial esthetics, and in the case of pediatric patients, respect for craniofacial growth. The surgeon, however, faces several challenges when attempting a reconstructive cranioplasty. For that reason, craniofacial defect repair often requires sophisticated treatment strategies and multidisciplinary input. In the ideal situation, autologous tissue similar in structure and function to that which is missing can be utilized for repair. In the context of the craniofacial skeleton, autologous cranial bone, or secondarily rib, iliac crest, or scapular bone, is most favorable. Often, this option is limited by the finite supply of available bone. Therefore, alternative strategies to repair craniofacial defects are necessary. In the field of regenerative medicine, tissue engineering has emerged as a promising concept, and several methods of bone engineering are currently under investigation. A growth factor-based approach utilizing bone morphogenetic proteins (BMPs) has demonstrated stimulatory effects on cranial bone and defect repair. When combined with cell-based and matrix-based models, regenerative goals can be optimized. This manuscript intends to review recent investigations of tissue engineering models used for the repair of craniofacial defects with a focus on the role of BMPs, scaffold materials, and novel cell lines. When sufficient autologous bone is not available, safe and effective strategies to engineer bone would allow the surgeon to meet the reconstructive goals of the craniofacial skeleton.
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Affiliation(s)
- Chad M. Teven
- Department of Surgery, Section of Plastic and Reconstructive Surgery, University of Chicago Medical Center, Chicago, IL, USA
| | - Sean Fisher
- Department of Surgery, Section of Plastic and Reconstructive Surgery, University of Chicago Medical Center, Chicago, IL, USA
| | - Guillermo A. Ameer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Tong-Chuan He
- Department of Orthopedic Surgery, University of Chicago Medical Center, Chicago, IL, USA
| | - Russell R. Reid
- Department of Surgery, Section of Plastic and Reconstructive Surgery, University of Chicago Medical Center, Chicago, IL, USA
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26
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Chung EJ, Sugimoto MJ, Koh JL, Ameer GA. A biodegradable tri-component graft for anterior cruciate ligament reconstruction. J Tissue Eng Regen Med 2014; 11:704-712. [PMID: 25414080 DOI: 10.1002/term.1966] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 08/29/2014] [Accepted: 09/17/2014] [Indexed: 01/14/2023]
Abstract
Bone-patellar tendon-bone (BPTB) autografts are the gold standard for anterior cruciate ligament (ACL) reconstruction because the bony ends allow for superior healing and anchoring through bone-to-bone regeneration. However, the disadvantages of BPTB grafts include donor site morbidity and patellar rupture. In order to incorporate bone-to-bone healing without the risks associated with harvesting autogenous tissue, a biodegradable and synthetic tri-component graft was fabricated, consisting of porous poly(1,8-octanediol-co-citric acid)-hydroxyapatite nanocomposites (POC-HA) and poly(l-lactide) (PLL) braids. All regions of the tri-component graft were porous and the tensile properties were in the range of the native ACL. When these novel grafts were used to reconstruct the ACL of rabbits, all animals after 6 weeks were weight-bearing and showed good functionality. Histological assessment confirmed tissue infiltration throughout the entire scaffold and tissue ingrowth and interlocking within the bone tunnels, which is favourable for graft fixation. In conclusion, this pilot study suggests that a tri-component, biodegradable graft is a promising strategy to regenerate tissue types necessary for ACL tissue engineering, and provides a basis for developing an off-the-shelf graft for ACL repair. Copyright © 2014 John Wiley & Sons, Ltd.
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Affiliation(s)
- Eun Ji Chung
- Biomedical Engineering Department, Northwestern University, Evanston, IL, USA
| | - Matthew J Sugimoto
- Biomedical Engineering Department, Northwestern University, Evanston, IL, USA
| | - Jason L Koh
- Department of Orthopaedic Surgery, North Shore University Health System, Evanston, IL, USA
| | - Guillermo A Ameer
- Biomedical Engineering Department, Northwestern University, Evanston, IL, USA.,Department of Surgery, Northwestern University, Chicago, IL, USA.,Simpson-Querrey Institute for Bionanotechnology, Northwestern University, Chicago, IL, USA.,Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, USA
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27
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Huang X, Bai S, Lu Q, Liu X, Liu S, Zhu H. Osteoinductive-nanoscaled silk/HA composite scaffolds for bone tissue engineering application. J Biomed Mater Res B Appl Biomater 2014; 103:1402-14. [DOI: 10.1002/jbm.b.33323] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 10/05/2014] [Accepted: 11/04/2014] [Indexed: 01/26/2023]
Affiliation(s)
- Xiaowei Huang
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 People's Republic of China
| | - Shumeng Bai
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 People's Republic of China
| | - Qiang Lu
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 People's Republic of China
| | - Xi Liu
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 People's Republic of China
| | - Shanshan Liu
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 People's Republic of China
| | - Hesun Zhu
- Research Center of Materials Science; Beijing Institute of Technology; Beijing 100081 People's Republic of China
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28
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Guo Y, Tran RT, Xie D, Wang Y, Nguyen DY, Gerhard E, Guo J, Tang J, Zhang Z, Bai X, Yang J. Citrate-based biphasic scaffolds for the repair of large segmental bone defects. J Biomed Mater Res A 2014; 103:772-81. [PMID: 24829094 DOI: 10.1002/jbm.a.35228] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Revised: 05/05/2014] [Accepted: 05/13/2014] [Indexed: 12/29/2022]
Abstract
Attempts to replicate native tissue architecture have led to the design of biomimetic scaffolds focused on improving functionality. In this study, biomimetic citrate-based poly (octanediol citrate)-click-hydroxyapatite (POC-Click-HA) scaffolds were developed to simultaneously replicate the compositional and architectural properties of native bone tissue while providing immediate structural support for large segmental defects following implantation. Biphasic scaffolds were fabricated with 70% internal phase porosity and various external phase porosities (between 5 and 50%) to mimic the bimodal distribution of cancellous and cortical bone, respectively. Biphasic POC-Click-HA scaffolds displayed compressive strengths up to 37.45 ± 3.83 MPa, which could be controlled through the external phase porosity. The biphasic scaffolds were also evaluated in vivo for the repair of 10-mm long segmental radial defects in rabbits and compared to scaffolds of uniform porosity as well as autologous bone grafts after 5, 10, and 15 weeks of implantation. The results showed that all POC-Click-HA scaffolds exhibited good biocompatibility and extensive osteointegration with host bone tissue. Biphasic scaffolds significantly enhanced new bone formation with higher bone densities in the initial stages after implantation. Biomechanical and histomorphometric analysis supported a similar outcome with biphasic scaffolds providing increased compression strength, interfacial bone ingrowth, and periosteal remodeling in early time points, but were comparable to all experimental groups after 15 weeks. These results confirm the ability of biphasic scaffold architectures to restore bone tissue and physiological functions in the early stages of recovery, and the potential of citrate-based biomaterials in orthopedic applications.
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Affiliation(s)
- Ying Guo
- Department of Orthopedic, Academy of Orthopedics, Guangdong Province, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510280, China; Department of Cell Biology, School of Basic Medical Science, Southern Medical University, Guangzhou, 510515, China
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29
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Shirazi FS, Moghaddam E, Mehrali M, Oshkour AA, Metselaar HSC, Kadri NA, Zandi K, Abu NA. In vitro characterization and mechanical properties of β-calcium silicate/POC composite as a bone fixation device. J Biomed Mater Res A 2014; 102:3973-85. [PMID: 24376053 DOI: 10.1002/jbm.a.35074] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/26/2013] [Accepted: 12/19/2013] [Indexed: 11/06/2022]
Abstract
Calcium silicate (CS, CaSiO3 ) is a bioactive, degradable, and biocompatible ceramic and has been considered for its potential in the field of orthopedic surgery. The objective of this study is the fabrication and characterization of the β-CS/poly(1.8-octanediol citrate) (POC) biocomposite, with the goals of controlling its weight loss and improving its biological and mechanical properties. POC is one of the most biocompatible polymers, and it is widely used in biomedical engineering applications. The degradation and bioactivity of the composites were determined by soaking the composites in phosphate-buffered saline and simulated body fluid, respectively. Human osteoblast cells were cultured on the composites to determine their cell proliferation and adhesion. The results illustrated that the flexural and compressive strengths were significantly enhanced by a modification of 40% POC. It was also concluded that the degradation bioactivity and amelioration of cell proliferation increased significantly with an increasing β-CS content.
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Affiliation(s)
- F S Shirazi
- Department of Mechanical Engineering and Advanced Material Research Center, University of Malaya, 50603, Kuala Lumpur, Malaysia
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30
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Ji Y, Wang X, Liang K. Regulating the mechanical properties of poly(1,8-octanediol citrate) bioelastomer via loading of chitin nanocrystals. RSC Adv 2014. [DOI: 10.1039/c4ra08033e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chitin nanocrystals successfully regulate the modulus and strength of poly(1,8-octanediol citrate) bioelastomer without the sacrifice of elongation.
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Affiliation(s)
- Yali Ji
- State Key Laboratory For Modification of Chemical Fibers and Polymer Materials
- College of Material Science and Engineering
- Donghua University
- Shanghai 201620, China
| | - Xuemin Wang
- State Key Laboratory For Modification of Chemical Fibers and Polymer Materials
- College of Material Science and Engineering
- Donghua University
- Shanghai 201620, China
| | - Kai Liang
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620, China
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31
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Chung EJ, Chien KB, Aguado BA, Shah RN. Osteogenic potential of BMP-2-releasing self-assembled membranes. Tissue Eng Part A 2013; 19:2664-73. [PMID: 23790163 PMCID: PMC3856670 DOI: 10.1089/ten.tea.2012.0667] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 06/20/2013] [Indexed: 11/12/2022] Open
Abstract
We report here the use of novel self-assembling collagen-hyaluronic acid (HyA) membranes to deliver bone morphogenetic protein-2 (BMP-2) for orthopedic applications. Prior work has demonstrated that collagen-HyA membranes are formed initially through electrostatic interactions between the oppositely charged collagen and HyA molecules, and that membrane growth is driven by osmotic pressure imbalances between the collagen and HyA solutions. The purpose of this study was to investigate the potential of incorporating charged growth factors such as BMP-2 within the membrane for regenerative medicine applications. Membrane material properties, protein mass loss, and release kinetics of BMP-2, as well as biocompatibility and osteogenic potential in vitro and in vivo using a subcutaneous mouse model were assessed. Scanning electron microscopy and mechanical testing confirmed no loss of structural or mechanical integrity upon BMP-2 incorporation into the membranes. Slow and steady release of the growth factor was demonstrated with 17% of total loaded BMP-2 released over the course of 49 days. To test biocompatibility and osteogenic potential in vitro, human mesenchymal stem cells were cultured on collagen-HyA membranes and showed greater proliferation rates (for up to 28 days) on membranes without BMP-2, but a greater alkaline phosphatase activity and osteocalcin production on membranes releasing BMP-2. In vivo subcutaneous implantation of the membranes showed a minimal immune response with osteoblasts and mineral deposits present in the ectopic site for BMP-2-releasing membranes, further demonstrating the potential of the BMP-2-releasing membranes to induce osteogenic differentiation. This study presents a novel strategy to create self-assembled membranes using two biocompatible molecules that can deliver bioactive agents in a sustained manner to induce a local regenerative response.
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Affiliation(s)
- Eun Ji Chung
- Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, Illinois
| | - Karen B. Chien
- Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, Illinois
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois
| | - Brian A. Aguado
- Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, Illinois
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois
| | - Ramille N. Shah
- Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, Illinois
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
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32
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Tran RT, Wang L, Zhang C, Huang M, Tang W, Zhang C, Zhang Z, Jin D, Banik B, Brown JL, Xie Z, Bai X, Yang J. Synthesis and characterization of biomimetic citrate-based biodegradable composites. J Biomed Mater Res A 2013; 102:2521-32. [PMID: 23996976 DOI: 10.1002/jbm.a.34928] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 08/07/2013] [Accepted: 08/12/2013] [Indexed: 12/27/2022]
Abstract
Natural bone apatite crystals, which mediate the development and regulate the load-bearing function of bone, have recently been associated with strongly bound citrate molecules. However, such understanding has not been translated into bone biomaterial design and osteoblast cell culture. In this work, we have developed a new class of biodegradable, mechanically strong, and biocompatible citrate-based polymer blends (CBPBs), which offer enhanced hydroxyapatite binding to produce more biomimetic composites (CBPBHAs) for orthopedic applications. CBPBHAs consist of the newly developed osteoconductive citrate-presenting biodegradable polymers, crosslinked urethane-doped polyester and poly (octanediol citrate), which can be composited with up to 65 wt % hydroxyapatite. CBPBHA networks produced materials with a compressive strength of 116.23 ± 5.37 MPa comparable to human cortical bone (100-230 MPa), and increased C2C12 osterix gene and alkaline phosphatase gene expression in vitro. The promising results above prompted an investigation on the role of citrate supplementation in culture medium for osteoblast culture, which showed that exogenous citrate supplemented into media accelerated the in vitro phenotype progression of MG-63 osteoblasts. After 6 weeks of implantation in a rabbit lateral femoral condyle defect model, CBPBHA composites elicited minimal fibrous tissue encapsulation and were well integrated with the surrounding bone tissues. The development of citrate-presenting CBPBHA biomaterials and preliminary studies revealing the effects of free exogenous citrate on osteoblast culture shows the potential of citrate biomaterials to bridge the gap in orthopedic biomaterial design and osteoblast cell culture in that the role of citrate molecules has previously been overlooked.
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Affiliation(s)
- Richard T Tran
- Department of Bioengineering, Materials Research Institute, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, 16802
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33
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Lee WH, Loo CY, Zavgorodniy AV, Ghadiri M, Rohanizadeh R. A novel approach to enhance protein adsorption and cell proliferation on hydroxyapatite: citric acid treatment. RSC Adv 2013. [DOI: 10.1039/c3ra22966a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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34
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Wu CH, Lee FK, Suresh Kumar S, Ling QD, Chang Y, Chang Y, Wang HC, Chen H, Chen DC, Hsu ST, Higuchi A. The isolation and differentiation of human adipose-derived stem cells using membrane filtration. Biomaterials 2012; 33:8228-39. [DOI: 10.1016/j.biomaterials.2012.08.027] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Accepted: 08/12/2012] [Indexed: 12/20/2022]
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35
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Hoshi RA, Van Lith R, Jen MC, Allen JB, Lapidos KA, Ameer G. The blood and vascular cell compatibility of heparin-modified ePTFE vascular grafts. Biomaterials 2012; 34:30-41. [PMID: 23069711 DOI: 10.1016/j.biomaterials.2012.09.046] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 09/21/2012] [Indexed: 12/21/2022]
Abstract
Prosthetic vascular grafts do not mimic the antithrombogenic properties of native blood vessels and therefore have higher rates of complications that involve thrombosis and restenosis. We developed an approach for grafting bioactive heparin, a potent anticoagulant glycosaminoglycan, to the lumen of ePTFE vascular grafts to improve their interactions with blood and vascular cells. Heparin was bound to aminated poly(1,8-octanediol-co-citrate) (POC) via its carboxyl functional groups onto POC-modified ePTFE grafts. The bioactivity and stability of the POC-immobilized heparin (POC-Heparin) were characterized via platelet adhesion and clotting assays. The effects of POC-Heparin on the adhesion, viability and phenotype of primary endothelial cells (EC), blood outgrowth endothelial cells (BOECs) obtained from endothelial progenitor cells (EPCs) isolated from human peripheral blood, and smooth muscle cells were also investigated. POC-Heparin grafts maintained bioactivity under physiologically relevant conditions in vitro for at least one month. Specifically, POC-Heparin-coated ePTFE grafts significantly reduced platelet adhesion and inhibited whole blood clotting kinetics. POC-Heparin supported EC and BOEC adhesion, viability, proliferation, NO production, and expression of endothelial cell-specific markers von Willebrand factor (vWF) and vascular endothelial-cadherin (VE-cadherin). Smooth muscle cells cultured on POC-Heparin showed increased expression of α-actin and decreased cell proliferation. This approach can be easily adapted to modify other blood contacting devices such as stents where antithrombogenicity and improved endothelialization are desirable properties.
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Affiliation(s)
- Ryan A Hoshi
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60208, USA
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