1
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Pereira AC, Tovar N, Nayak VV, Mijares DQ, Smay JE, Torroni A, Flores RL, Witek L. Direct inkjet writing type 1 bovine collagen/β-tricalcium phosphate scaffolds for bone regeneration. J Biomed Mater Res B Appl Biomater 2024; 112:e35347. [PMID: 38247237 PMCID: PMC10832301 DOI: 10.1002/jbm.b.35347] [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: 09/14/2023] [Accepted: 10/27/2023] [Indexed: 01/23/2024]
Abstract
Bone tissue has the capacity to regenerate under healthy conditions, but complex cases like critically sized defects hinder natural bone regeneration, necessitating surgery, and use of a grafting material for rehabilitation. The field of bone tissue engineering (BTE) has pioneered ways to address such issues utilizing different biomaterials to create a platform for cell migration and tissue formation, leading to improved bone reconstruction. One such approach involves 3D-printed patient-specific scaffolds designed to aid in regeneration of boney defects. This study aimed to develop and characterize 3D printed scaffolds composed of type I collagen augmented with β-tricalcium phosphate (COL/β-TCP). A custom-built direct inkjet write (DIW) printer was used to fabricate β-TCP, COL, and COL/β-TCP scaffolds using synthesized colloidal gels. After chemical crosslinking, the scaffolds were lyophilized and subjected to several characterization techniques, including light microscopy, scanning electron microscopy, and x-ray diffraction to evaluate morphological and chemical properties. In vitro evaluation was performed using human osteoprogenitor cells to assess cytotoxicity and proliferative capacity of the different scaffold types. Characterization results confirmed the presence of β-TCP in the 3D printed COL/β-TCP scaffolds, which exhibited crystals that were attributed to β-TCP due to the presence of calcium and phosphorus, detected through energy dispersive x-ray spectroscopy. In vitro studies showed that the COL/β-TCP scaffolds yielded more favorable results in terms of cell viability and proliferation compared to β-TCP and COL scaffolds. The novel COL/β-TCP scaffold constructs hold promise for improving BTE applications and may offer a superior environment for bone regeneration compared with conventional COL and β-TCP scaffolds.
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Affiliation(s)
- Angel Cabrera Pereira
- Biomaterials Division, NYU College of Dentistry, 345 E. 24 St., Room 902A, New York, NY
| | - Nick Tovar
- Department of Oral and Maxillofacial Surgery, New York University, Langone Medical Center and Bellevue Hospital Center, 462 1 Ave, Building H5-S, New York, NY
| | - Vasudev Vivekanand Nayak
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, 1011 NW 15th St, Rm. 305, Miami, FL
| | - Dindo Q. Mijares
- Biomaterials Division, NYU College of Dentistry, 433 1 Ave., Office 715F, New York, NY
| | - James E. Smay
- School of Materials Science and Engineering, Oklahoma State University, 700 N Greenwood Ave – HRC 202 Tulsa, OK
| | - Andrea Torroni
- Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, 222 E 41st St, New York, NY
| | - Roberto L. Flores
- Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, 222 E 41st St, New York, NY
| | - Lukasz Witek
- Biomaterials Division, NYU College of Dentistry, New York, NY; Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, NY; Department of Biomedical Engineering, NYU Tandon School of Engineering, Brooklyn, NY; 345 E. 24th St., Room 902D New York, NY
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2
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Amini M, Venkatesan JK, Liu W, Leroux A, Nguyen TN, Madry H, Migonney V, Cucchiarini M. Advanced Gene Therapy Strategies for the Repair of ACL Injuries. Int J Mol Sci 2022; 23:ijms232214467. [PMID: 36430947 PMCID: PMC9695211 DOI: 10.3390/ijms232214467] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/07/2022] [Accepted: 11/19/2022] [Indexed: 11/23/2022] Open
Abstract
The anterior cruciate ligament (ACL), the principal ligament for stabilization of the knee, is highly predisposed to injury in the human population. As a result of its poor intrinsic healing capacities, surgical intervention is generally necessary to repair ACL lesions, yet the outcomes are never fully satisfactory in terms of long-lasting, complete, and safe repair. Gene therapy, based on the transfer of therapeutic genetic sequences via a gene vector, is a potent tool to durably and adeptly enhance the processes of ACL repair and has been reported for its workability in various experimental models relevant to ACL injuries in vitro, in situ, and in vivo. As critical hurdles to the effective and safe translation of gene therapy for clinical applications still remain, including physiological barriers and host immune responses, biomaterial-guided gene therapy inspired by drug delivery systems has been further developed to protect and improve the classical procedures of gene transfer in the future treatment of ACL injuries in patients, as critically presented here.
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Affiliation(s)
- Mahnaz Amini
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
| | - Jagadeesh K. Venkatesan
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
| | - Wei Liu
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
| | - Amélie Leroux
- Laboratoire CSPBAT UMR CNRS 7244, Université Sorbonne Paris Nord, Avenue JB Clément, 93430 Villetaneuse, France
| | - Tuan Ngoc Nguyen
- Laboratoire CSPBAT UMR CNRS 7244, Université Sorbonne Paris Nord, Avenue JB Clément, 93430 Villetaneuse, France
| | - Henning Madry
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
| | - Véronique Migonney
- Laboratoire CSPBAT UMR CNRS 7244, Université Sorbonne Paris Nord, Avenue JB Clément, 93430 Villetaneuse, France
| | - Magali Cucchiarini
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg, Germany
- Correspondence: or
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3
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Luo W, Chi R, Zeng F, Wu Y, Chen Y, Liu S, Lin W, Lin H, Ye X, Chen J. Multilayer Structure Ammoniated Collagen Fibers for Fast Adsorption of Anionic Dyes. ACS OMEGA 2021; 6:27070-27079. [PMID: 34693127 PMCID: PMC8529676 DOI: 10.1021/acsomega.1c03643] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
Dye wastewater has become one of the difficult industrial wastewaters due to its significant characteristics such as high chroma and poor biodegradability. Here, we use collagen fibers (CFs) as the matrix, glutaraldehyde as the cross-linking agent, and polyethyleneimine (PEI) as the ammoniating modifier to prepare cationic-modified collagen fibers (CF-PEI). The CF-PEI still maintained the original fibrous structure with a larger adsorption area. The content of primary amino groups on CF-PEI was significantly increased, which not only improved the hydrophilic swelling performance of CFs but also improved the adsorption capacity. The adsorption capacity of CF-PEI for soap yellow and acid red could reach 538.2 and 369.7 mg g-1, respectively. The adsorption rate was fast, and the adsorption equilibrium could be reached in about 60 min. Desorption regeneration studies have shown that 0.1 mol L-1 HCl could achieve a better desorption effect, and the CF-PEI had a good recycling performance. The ammoniated modified CF-PEI was an excellent adsorption treatment material for anionic dye wastewater. It is expected to become an effective way for high-value resource utilization of waste dander in the leather industry.
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Affiliation(s)
- Wei Luo
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Ruiyang Chi
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Fanke Zeng
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Yahan Wu
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Yun Chen
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Shuting Liu
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Wei Lin
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Huiting Lin
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Xiaoxia Ye
- Fujian
Provincial Engineering Research Center of Rural Waste Recycling Technology,
College of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
| | - Jie Chen
- College
of Environment & Safety Engineering, Fuzhou University, Minhou, Fujian 350108, PR China
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4
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Pauly H, Kelly D, Popat K, Easley J, Palmer R, Haut Donahue TL. Mechanical properties of a hierarchical electrospun scaffold for ovine anterior cruciate ligament replacement. J Orthop Res 2019; 37:421-430. [PMID: 30474882 DOI: 10.1002/jor.24183] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 10/30/2018] [Indexed: 02/04/2023]
Abstract
The anterior cruciate ligament (ACL) acts to stabilize the knee and prevent excessive motion of the tibia relative to the femur. Tears of the ACL are common and can result in pain and damage to surrounding tissues. Thus a torn ACL is often surgically replaced with an autograft or allograft material. Drawbacks to clinically available ACL grafts motivate the development of a tissue engineered ACL replacement. Our group has previously developed a polycaprolactone electrospun scaffold that mimics the hierarchical structure of the ACL. The goal of this study was to investigate the mechanical properties of the electrospun scaffold as an ACL replacement. Scaffold mechanical properties were assessed prior to implantation via stress relaxation and pull to failure testing. Following in vitro characterization, electrospun scaffolds and soft tissue grafts were implanted into ovine cadaver stifle joints as ACL replacements. Stifle joints with ACL replacements were tested via a simulated anterior drawer test as well as in situ stress relaxation and pull to failure tests and compared to stifle joints with the native ACL intact. Prior to implantation the scaffold matched the native ovine ACL well in the range of functional strains as evidenced by stress relaxation measures and the toe region stiffness. After implantation the scaffold was more similar to the native ACL than the soft tissue graft, particularly when it came to reducing joint laxity and matching stress relaxation measures. These results demonstrate that the electrospun scaffold has the potential to be a suitable material for ACL replacement. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:421-430, 2019.
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Affiliation(s)
- Hannah Pauly
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado
| | - Daniel Kelly
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland.,Department of Anatomy, Royal College of Surgeons in Ireland, Dublin 2, Ireland.,Advanced Materials and Bioengineering Research Centre, Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
| | - Ketul Popat
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado.,Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado
| | - Jeremiah Easley
- Clinical Sciences Department, Colorado State University, Fort Collins, Colorado
| | - Ross Palmer
- Clinical Sciences Department, Colorado State University, Fort Collins, Colorado
| | - Tammy L Haut Donahue
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado.,Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado.,Department of Biomedical Engineering, University of Massachusetts, 130 Natural Resources Rd., Amherst, Massachusetts 01003
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5
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Brzezinski A, Ghodbane SA, Patel JM, Perry BA, Gatt CJ, Dunn MG. * The Ovine Model for Meniscus Tissue Engineering: Considerations of Anatomy, Function, Implantation, and Evaluation. Tissue Eng Part C Methods 2017; 23:829-841. [PMID: 28805136 DOI: 10.1089/ten.tec.2017.0192] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Meniscus injuries represent one of the most-common intra-articular knee injuries. The current treatment options include meniscectomy and allograft transplantation, both with poor long-term outcomes. Therefore, there is a need for regenerative techniques to restore meniscal function. To preclinically test scaffolds for meniscus replacement, large animal models need to be established and standardized. This review establishes the anatomical and compositional similarities between human and sheep menisci and provides guidance for implantation and evaluation of such devices. The ovine meniscus represents a scaled-down version of the human meniscus, with only slight structural differences that can be addressed during device fabrication. Implantation protocols in sheep remain a challenge, as the meniscus cannot be visualized with the arthroscopic-assisted procedures commonly performed in human patients. Thus, we recommend the appropriate implantation protocols for meniscus visualization, ligamentous restoration, and surgical fixation of both total and partial meniscus replacement devices. Last, due to the lack of standardization in evaluation techniques, we recommend a comprehensive battery of tests to evaluate the efficacy of meniscus replacement implants. We recommend other investigators utilize these surgical and testing techniques to establish the ovine model as the gold standard for preclinical evaluation of meniscus replacement devices.
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Affiliation(s)
- Andrzej Brzezinski
- 1 Department of Orthopaedic Surgery, Rutgers Biomedical and Health Sciences-Robert Wood Johnson Medical School , New Brunswick, New Jersey
| | - Salim A Ghodbane
- 1 Department of Orthopaedic Surgery, Rutgers Biomedical and Health Sciences-Robert Wood Johnson Medical School , New Brunswick, New Jersey.,2 Department of Biomedical Engineering, Rutgers, The State University of New Jersey , Piscataway, New Jersey
| | - Jay M Patel
- 1 Department of Orthopaedic Surgery, Rutgers Biomedical and Health Sciences-Robert Wood Johnson Medical School , New Brunswick, New Jersey.,2 Department of Biomedical Engineering, Rutgers, The State University of New Jersey , Piscataway, New Jersey
| | - Barbara A Perry
- 1 Department of Orthopaedic Surgery, Rutgers Biomedical and Health Sciences-Robert Wood Johnson Medical School , New Brunswick, New Jersey
| | - Charles J Gatt
- 1 Department of Orthopaedic Surgery, Rutgers Biomedical and Health Sciences-Robert Wood Johnson Medical School , New Brunswick, New Jersey.,2 Department of Biomedical Engineering, Rutgers, The State University of New Jersey , Piscataway, New Jersey
| | - Michael G Dunn
- 1 Department of Orthopaedic Surgery, Rutgers Biomedical and Health Sciences-Robert Wood Johnson Medical School , New Brunswick, New Jersey.,2 Department of Biomedical Engineering, Rutgers, The State University of New Jersey , Piscataway, New Jersey
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6
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Bedoui F, Murthy NS, Kohn J. Structure and thermal transitions in a biomedically relevant liquid crystalline poly(ester amide). Macromolecules 2017; 50:2257-2266. [PMID: 31686708 DOI: 10.1021/acs.macromol.6b02473] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There is still a need to develop bioresorbable polymers with high strength and high modulus for load-bearing biomedical applications. Here we investigate the liquid crystalline structural features of poly(desaminotyrosyl-tyrosine dodecyl dodecanedioate), poly(DTD DD), a new bioresorbable poly(ester amide) that is currently studied in vivo as a slow-degrading implantable biomaterial for load bearing applications. Thermally induced structural changes in poly(DTD DD) were studied using simultaneously differential scanning calorimetry (DSC) and X-ray scattering. The hexatic SmB organization of the polymer chains that exists at room temperature becomes progressively disordered upon heating, changing into a SmF phase and then into a smectic C phase at 60°C before turning into a free flowing melt at 130°C. X-ray scattering data and thermal analysis indicate the presence of a 2D ordered structure in the polymer melt. A structural model with an interesting 3-fold symmetry in the packing of the side chains around the rigid aromatic main chain, and the packing of these chains into fibrils is proposed. The liquid crystalline behavior of poly(DTD DD) makes it possible to melt process it at low temperatures without thermal degradation. This is a noteworthy advantage for the use of poly(DTD DD) as a high strength, readily processable, yet biodegradable polymer.
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Affiliation(s)
- F Bedoui
- Sorbonne Universités, Université de Technologie de Compiègne, Laboratoire Roberval UMR-CNRS 7337, Université de Technologie de Compiègne, France.,Materials and Process Simulation Center, California Institute of Technology, Pasadena, California, USA
| | - N S Murthy
- Sorbonne Universités, Université de Technologie de Compiègne, Laboratoire Roberval UMR-CNRS 7337, Université de Technologie de Compiègne, France.,New Jersey Center for Biomaterials, Rutgers University, New Jersey, USA
| | - J Kohn
- New Jersey Center for Biomaterials, Rutgers University, New Jersey, USA
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7
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Miranda-Nieves D, Chaikof EL. Collagen and Elastin Biomaterials for the Fabrication of Engineered Living Tissues. ACS Biomater Sci Eng 2016; 3:694-711. [PMID: 33440491 DOI: 10.1021/acsbiomaterials.6b00250] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Collagen and elastin represent the two most predominant proteins in the body and are responsible for modulating important biological and mechanical properties. Thus, the focus of this review is the use of collagen and elastin as biomaterials for the fabrication of living tissues. Considering the importance of both biomaterials, we first propose the notion that many tissues in the human body represent a reinforced composite of collagen and elastin. In the rest of the review, collagen and elastin biosynthesis and biophysics, as well as molecular sources and biomaterial fabrication methodologies, including casting, fiber spinning, and bioprinting, are discussed. Finally, we summarize the current attempts to fabricate a subset of living tissues and, based on biochemical and biomechanical considerations, suggest that future tissue-engineering efforts consider direct incorporation of collagen and elastin biomaterials.
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Affiliation(s)
- David Miranda-Nieves
- Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,Department of Surgery, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, United States
| | - Elliot L Chaikof
- Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,Department of Surgery, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, United States.,Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02215, United States
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8
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Negahi Shirazi A, Chrzanowski W, Khademhosseini A, Dehghani F. Anterior Cruciate Ligament: Structure, Injuries and Regenerative Treatments. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 881:161-86. [PMID: 26545750 DOI: 10.1007/978-3-319-22345-2_10] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Anterior cruciate ligament (ACL) is one of the most vulnerable ligaments of the knee. ACL impairment results in episodic instability, chondral and meniscal injury and early osteoarthritis. The poor self-healing capacity of ACL makes surgical treatment inevitable. Current ACL reconstructions include a substitution of torn ACL via biological grafts such as autograft, allograft. This review provides an insight of ACL structure, orientation and properties followed by comparing the performance of various constructs that have been used for ACL replacement. New approaches, undertaken to induce ACL regeneration and fabricate biomimetic scaffolds, are also discussed.
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Affiliation(s)
- Ali Negahi Shirazi
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, 2006, Australia
| | | | - Ali Khademhosseini
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, USA.,Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Fariba Dehghani
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, 2006, Australia. .,Department of Bioengineering, University of Sydney, Sydney, NSW, Australia.
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9
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Bi F, Shi Z, Liu A, Guo P, Yan S. Anterior cruciate ligament reconstruction in a rabbit model using silk-collagen scaffold and comparison with autograft. PLoS One 2015; 10:e0125900. [PMID: 25938408 PMCID: PMC4418759 DOI: 10.1371/journal.pone.0125900] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 03/23/2015] [Indexed: 01/09/2023] Open
Abstract
The objective of the present study was to perform an in vivo assessment of a novel silk-collagen scaffold for anterior cruciate ligament (ACL) reconstruction. First, a silk-collagen scaffold was fabricated by combining sericin-extracted knitted silk fibroin mesh and type I collagen to mimic the components of the ligament. Scaffolds were electron-beam sterilized and rolled up to replace the ACL in 20 rabbits in the scaffold group, and autologous semitendinosus tendons were used to reconstruct the ACL in the autograft control group. At 4 and 16 weeks after surgery, grafts were retrieved and analyzed for neoligament regeneration and tendon-bone healing. To evaluate neoligament regeneration, H&E and immunohistochemical staining was performed, and to assess tendon-bone healing, micro-CT, biomechanical test, H&E and Russell-Movat pentachrome staining were performed. Cell infiltration increased over time in the scaffold group, and abundant fibroblast-like cells were found in the core of the scaffold graft at 16 weeks postoperatively. Tenascin-C was strongly positive in newly regenerated tissue at 4 and 16 weeks postoperatively in the scaffold group, similar to observations in the autograft group. Compared with the autograft group, tendon-bone healing was better in the scaffold group with trabecular bone growth into the scaffold. The results indicate that the silk-collagen scaffold has considerable potential for clinical application.
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Affiliation(s)
- Fanggang Bi
- Department of Orthopedic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Zhongli Shi
- Department of Orthopedic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - An Liu
- Department of Orthopedic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Peng Guo
- Department of Orthopedic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Shigui Yan
- Department of Orthopedic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- * E-mail:
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10
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Nano/Micro Hybrid Scaffold of PCL or P3HB Nanofibers Combined with Silk Fibroin for Tendon and Ligament Tissue Engineering. J Appl Biomater Funct Mater 2015; 13:e156-68. [DOI: 10.5301/jabfm.5000216] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2014] [Indexed: 11/20/2022] Open
Abstract
A novel biodegradable nano/micro hybrid structure was obtained by electrospinning P3HB or PCL nanofibers onto a twisted silk fibroin (SF) structure, with the aim of fabricating a suitable scaffold for tendon and ligament tissue engineering. The electrospinning (ES) processing parameters for P3HB and PCL were optimized on 2D samples, and applied to produce two different nano/micro hybrid constructs (SF/ES-PCL and SF/ES-P3HB). Morphological, chemico-physical and mechanical properties of the novel hybrid scaffolds were evaluated by SEM, ATR FT-IR, DSC, tensile and thermodynamic mechanical tests. The results demonstrated that the nanofibers were tightly wrapped around the silk filaments, and the crystallinity of the SF twisted yarns was not influenced by the presence of the electrospun polymers. The slightly higher mechanical properties of the hybrid constructs confirmed an increase of internal forces due to the interaction between nano and micro components. Cell culture tests with L929 fibroblasts, in the presence of the sample eluates or in direct contact with the hybrid structures, showed no cytotoxic effects and a good level of cytocompatibility of the nano/micro hybrid structures in term of cell viability, particularly at day 1. Cell viability onto the nano/micro hybrid structures decreased from the first to the third day of culture when compared with the control culture plastic, but appeared to be higher when compared with the uncoated SF yarns. Although additional in vitro and in vivo tests are needed, the original fabrication method here described appears promising for scaffolds suitable for tendon and ligament tissue engineering.
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11
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LI ZHENG, HE JIANKANG, LI XIANG, BIAN WEIGUO, ZHANG WENYOU, LI DICHEN, JIN ZHONGMIN, QIU YUSHENG, SNEDEKER JESSG. REGENERATION OF ANTERIOR CRUCIATE LIGAMENT WITH SILK-BASED SCAFFOLD IN PORCINE MODEL. J MECH MED BIOL 2015. [DOI: 10.1142/s0219519415500062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Silk was widely investigated as a promising scaffold material in ligament tissue engineering. Although a variety of silk scaffolds were developed for the regeneration of anterior cruciate ligament (ACL) in vitro and in vivo, more investigations should be performed in large animals to translate these findings into clinical applications. The aim of this study is to evaluate the feasibility of using silk-based ACL scaffolds to regenerate damaged ACLs in porcine model. The microstructural organization, tissue regeneration as well as ligament-bone interface of silk implants were evaluated with scanning electron microscopy, micro-computerized tomography, histological and immunohistochemical staining at three and six months postoperatively. The results demonstrated that silk fibers in the ACL scaffolds organized in parallel similar with collagen fibers in native ligaments, which facilitated and guided the penetration of newly regenerated tissue into the pores among silk fibers. Collagen production especially collagen I in silk implants significantly increased from three to six months, and was gradually close to the level of native ligaments. At implant-bone interface, indirect ligament-bone insertion was observed at three months and substantial Sharpey's fibers formed at six months. The results indicated that the silk-based ACL scaffold provides a promising tissue engineering approach for ACL regeneration.
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Affiliation(s)
- ZHENG LI
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Department of Orthopaedics Surgery, the First Hospital of Xi'an Jiaotong University, Xi'an 710061, P. R. China
| | - JIANKANG HE
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - XIANG LI
- University Hospital Balgrist, Zürich, Switzerland
- Institute for Biomechanics, ETH Zürich, Switzerland
| | - WEIGUO BIAN
- Department of Orthopaedics Surgery, the First Hospital of Xi'an Jiaotong University, Xi'an 710061, P. R. China
| | - WENYOU ZHANG
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - DICHEN LI
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - ZHONGMIN JIN
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - YUSHENG QIU
- Department of Orthopaedics Surgery, the First Hospital of Xi'an Jiaotong University, Xi'an 710061, P. R. China
| | - JESS G. SNEDEKER
- University Hospital Balgrist, Zürich, Switzerland
- Institute for Biomechanics, ETH Zürich, Switzerland
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12
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Leong NL, Petrigliano FA, McAllister DR. Current tissue engineering strategies in anterior cruciate ligament reconstruction. J Biomed Mater Res A 2013; 102:1614-24. [DOI: 10.1002/jbm.a.34820] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 05/21/2013] [Accepted: 05/22/2013] [Indexed: 12/11/2022]
Affiliation(s)
- Natalie L. Leong
- Department of Orthopaedic Surgery; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Frank A. Petrigliano
- Department of Orthopaedic Surgery; David Geffen School of Medicine at UCLA; Los Angeles California
| | - David R. McAllister
- Department of Orthopaedic Surgery; David Geffen School of Medicine at UCLA; Los Angeles California
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Cai C, Chen C, Chen G, Wang F, Guo L, Yin L, Feng D, Yang L. Type I collagen and polyvinyl alcohol blend fiber scaffold for anterior cruciate ligament reconstruction. Biomed Mater 2013; 8:035001. [PMID: 23531980 DOI: 10.1088/1748-6041/8/3/035001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The aim of this study was to perform an evaluation of a braided fiber scaffold for anterior cruciate ligament (ACL) reconstruction. The scaffold was composed of 50% type I collagen (Col-I) and 50% polyvinyl alcohol (PVA). First, the biocompatibility and in vitro weight loss of the scaffold were tested. Then, the scaffolds were used to reconstruct the ACL in China Bama mimi pigs. At 24 weeks post-operation, the mechanical properties and histology of the regenerated ACL were analyzed. The maximum load and tensile strength were 472.43± 15.2 N and 29.71± 0.96 MPa, respectively; both were ~75% of those of native ACL and ~90% of those of fiber scaffold. This indicated that the scaffold maintained a large portion of native ACL's mechanical properties, and tissue formation on the scaffold compensated most of the tensile strength loss caused by scaffold degradation. Histology and immunohistology analysis showed the morphology and major extracellular matrix components of the regenerated ligament resembled the native ACL. Thus, the Col-I/PVA blend fiber ACL scaffold showed good potential for clinical applications.
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Affiliation(s)
- Changbin Cai
- Center for Joint Surgery, Southwest Hospital, the Third Military Medical University, Chongqing 400038, People's Republic of China
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Morelli V, Bright C, Fields A. Ligamentous injuries of the knee: anterior cruciate, medial collateral, posterior cruciate, and posterolateral corner injuries. Prim Care 2013; 40:335-56. [PMID: 23668648 DOI: 10.1016/j.pop.2013.02.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
This article discusses athletic injuries of the anterior cruciate ligament (ACL), posterior cruciate ligament (PCL), medial collateral ligament (MCL), and posterolateral corner. Best evidence to date validates that conservative management of ACL ruptures is a reasonable strategy. Current data also seem to advocate nonoperative management of PCL injuries. All isolated MCL injuries, regardless of grade, are usually treated with a brief period of immobilization and symptomatic management. Although the surgical literature often advocates surgical treatment of posterolateral corner injuries, there have been no randomized trials substantiating that these injuries are best treated surgically.
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Affiliation(s)
- Vincent Morelli
- Department of Family and Community Medicine, Meharry Medical College, Nashville, TN 37208, USA.
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