1
|
Jahani B, Vaidya R, Jin JM, Aboytes DA, Broz KS, Krothapalli S, Pujari B, Baig WM, Tang SY. Assessment of bovine cortical bone fracture behavior using impact microindentation as a surrogate of fracture toughness. JBMR Plus 2024; 8:ziad012. [PMID: 38505533 PMCID: PMC10945719 DOI: 10.1093/jbmrpl/ziad012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/14/2023] [Accepted: 12/05/2023] [Indexed: 03/21/2024] Open
Abstract
The fracture behavior of bone is critically important for evaluating its mechanical competence and ability to resist fractures. Fracture toughness is an intrinsic material property that quantifies a material's ability to withstand crack propagation under controlled conditions. However, properly conducting fracture toughness testing requires the access to calibrated mechanical load frames and the destructive testing of bone samples, and therefore fracture toughness tests are clinically impractical. Impact microindentation mimicks certain aspects of fracture toughness measurements, but its relationship with fracture toughness remains unknown. In this study, we aimed to compare measurements of notched fracture toughness and impact microindentation in fresh and boiled bovine bone. Skeletally mature bovine bone specimens (n = 48) were prepared, and half of them were boiled to denature the organic matrix, while the other half remained preserved in frozen conditions. All samples underwent a notched fracture toughness test to determine their resistance to crack initiation (KIC) and an impact microindentation test using the OsteoProbe to obtain the Bone Material Strength index (BMSi). Boiling the bone samples increased the denatured collagen content, while mineral density and porosity remained unaffected. The boiled bones also showed significant reduction in both KIC (P < .0001) and the average BMSi (P < .0001), leading to impaired resistance of bone to crack propagation. Remarkably, the average BMSi exhibited a high correlation with KIC (r = 0.86; P < .001). A ranked order difference analysis confirmed the excellent agreement between the 2 measures. This study provides the first evidence that impact microindentation could serve as a surrogate measure for bone fracture behavior. The potential of impact microindentation to assess bone fracture resistance with minimal sample disruption could offer valuable insights into bone health without the need for cumbersome testing equipment and sample destruction.
Collapse
Affiliation(s)
- Babak Jahani
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, MO 63110, United States
| | - Rachana Vaidya
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, MO 63110, United States
| | - James M Jin
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, MO 63110, United States
| | - Donald A Aboytes
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, MO 63110, United States
| | - Kaitlyn S Broz
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, MO 63110, United States
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63110, United States
| | - Siva Krothapalli
- School of Medicine, St Louis University, MO 63104, United States
| | - Bhanuteja Pujari
- School of Medicine, St Louis University, MO 63104, United States
| | - Walee M Baig
- Department of Biology and Environmental Health, Missouri Southern State University, Joplin, MO 64801, United States
| | - Simon Y Tang
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, MO 63110, United States
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63110, United States
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63130, United States
| |
Collapse
|
2
|
Kwon EY, Abusharkh HA, Ruan X, Du D, Hammond-Pereira E, Van Wie BJ. Pd@Pt nanoparticle-linked immunosorbent assay for quantification of Collagen type II. Anal Chim Acta 2023; 1266:341265. [PMID: 37244654 PMCID: PMC10564550 DOI: 10.1016/j.aca.2023.341265] [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: 10/17/2022] [Revised: 04/01/2023] [Accepted: 04/23/2023] [Indexed: 05/29/2023]
Abstract
The evaluation of specific protein content in engineered tissues provides a gateway for developing regenerative medicine treatments. Since collagen type II, the major component of articular cartilage, is critical for the blossoming field of articular cartilage tissue engineering, the interest in this protein is growing rapidly. Accordingly, the need for quantification of collagen type II is increasing as well. In this study, we provide recent results for a new quantifying nanoparticle sandwich immunoassay technique for collagen type II. Since mesoporous palladium@platinum (Pd@Pt) nanoparticles have peroxidase-like catalytic activities, these nanoparticles were utilized in an enzyme-linked immunosorbent assay (ELISA)-like format to circumvent the need for traditional enzymes. These nanoparticles were easily conjugated with anti-collagen type II antibodies by the natural affinity interaction and used to develop a direct sandwich ELISA-like format for nanoparticle-linked immunosorbent assays. Using this method, we obtained a limit of detection of 1 ng mL-1, a limit of quantification of 9 ng mL-1. and a broad linear range between 1 ng mL-1 and 50 μg mL-1 for collagen type II with an average relative standard deviation of 5.5%, useable over a pH range of 7 - 9 at least. The assay was successfully applied to quantify collagen type II in cartilage tissues and compared with the results of commercial ELISAs and gene expression by reverse transcription-quantitative polymerase chain reaction. This method provides a thermally stable and cost-efficient alternative to traditional ELISAs. It also extends the application of nanoparticle-linked immunosorbent assays, thereby providing the potential to quantify other proteins and apply the technology in the medical, environmental, and biotechnology industry fields.
Collapse
Affiliation(s)
- Eunice Y Kwon
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164-6515, United States
| | - Haneen A Abusharkh
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164-6515, United States
| | - Xiaofan Ruan
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164-2920, United States
| | - Dan Du
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164-2920, United States
| | - Ellis Hammond-Pereira
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164-6515, United States
| | - Bernard J Van Wie
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164-6515, United States.
| |
Collapse
|
3
|
Ateshian GA, Hung CT, Weiss JA, Zimmerman BK. Modeling Inelastic Responses Using Constrained Reactive Mixtures. EUROPEAN JOURNAL OF MECHANICS. A, SOLIDS 2023; 100:105009. [PMID: 37252210 PMCID: PMC10211082 DOI: 10.1016/j.euromechsol.2023.105009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This study reviews the progression of our research, from modeling growth theories for cartilage tissue engineering, to the formulation of constrained reactive mixture theories to model inelastic responses in any solid material, such as theories for damage mechanics, viscoelasticity, plasticity, and elasto-plastic damage. In this framework, multiple solid generations α can co-exist at any given time in the mixture. The oldest generation is denoted by α = s and is called the master generation, whose reference configuration X s is observable. The solid generations α are all constrained to share the same velocity v s , but may have distinct reference configurations X α . An important element of this formulation is that the time-invariant mapping F α s = ∂ X α / ∂ X s between these reference configurations is a function of state, whose mathematical formulation is postulated by constitutive assumption. Thus, reference configurations X α are not observable ( α ≠ s ) . This formulation employs only observable state variables, such as the deformation gradient F s of the master generation and the referential mass concentrations ρ r α of each generation, in contrast to classical formulations of inelastic responses which rely on internal state variable theory, requiring evolution equations for those hidden variables. In constrained reactive mixtures, the evolution of the mass concentrations is governed by the axiom of mass balance, using constitutive models for the mass supply densities ρ ˆ r α . Classical and constrained reactive mixture approaches share considerable mathematical analogies, as they both introduce a multiplicative decomposition of the deformation gradient, also requiring evolution equations to track some of the state variables. However, they also differ at a fundamental level, since one adopts only observable state variables while the other introduces hidden state variables. In summary, this review presents an alternative foundational approach to the modeling of inelastic responses in solids, grounded in the classical framework of mixture theory.
Collapse
Affiliation(s)
- Gerard A. Ateshian
- Columbia University, Department of Mechanical Engineering, 10027, New York, New York, United States
| | - Clark T. Hung
- Columbia University, Department of Biomedical Engineering, 10027, New York, New York, United States
| | - Jeffrey A. Weiss
- University of Utah, Department of Biomedical Engineering, 84112, Salt Lake City, Utah, United States
| | - Brandon K. Zimmerman
- Lawrence Livermore National Laboratory, Computational Geosciences Group, 94550, Livermore, California, United States
| |
Collapse
|
4
|
Zhang Q, Li X, Huang K, Huang Y, Zhao S, Liu S, Li Y. Controlling the Trimerization of the Collagen Triple-Helix by Solvent Switching. Biomacromolecules 2023; 24:1689-1699. [PMID: 36967667 DOI: 10.1021/acs.biomac.2c01475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Collagen hybridizing peptides (CHPs) are a powerful tool for targeting collagen damage in pathological tissues due to their ability to specifically form a hybrid collagen triple-helix with the denatured collagen chains. However, CHPs have a strong tendency to self-trimerize, requiring preheating or complicated chemical modifications to dissociate their homotrimers into monomers, which hinders their applications. To control the self-assembly of CHP monomers, we evaluated the effects of 22 cosolvents on the triple-helix structure: unlike typical globular proteins, the CHP homotrimers (as well as the hybrid CHP-collagen triple helix) cannot be destabilized by the hydrophobic alcohols and detergents (e.g., SDS) but can be effectively dissociated by the cosolvents that dominate hydrogen bonds (e.g., urea, guanidinium salts, and hexafluoroisopropanol). Our study provided a reference for the solvent effects on natural collagen and a simple effective solvent-switch method, enabling CHP utilization in automated histopathology staining and in vivo imaging and targeting of collagen damage.
Collapse
|
5
|
Song KX, Ji SL, Zhao YJ, Zhang HR, Ma RX, Zhang JY, Hu YC. Effects of demineralization mode and particle size of allogeneic bone powder on its physical and chemical properties. Cell Tissue Bank 2023; 24:203-210. [PMID: 35831637 DOI: 10.1007/s10561-022-10025-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/23/2022] [Indexed: 11/25/2022]
Abstract
At present, the commonly used allogeneic bone powder in the clinic can be divided into nondemineralized bone matrix and demineralized bone matrix (DBM). Commonly used demineralizers include acids and ethylene diamine tetraacetic acid (EDTA). There may be some diversities between them. Also, the size of the bone particle can affects its cell compatibility and osteogenic ability. We produced different particle sizes i.e., < 75, 75-100, 100-315, 315-450, 450-650, and 650-1000 μm, and treated in three ways (nondemineralized, demineralized by EDTA, and demineralized by HCl). Scanning electron microscopy showed that the surface of the samples in each group was relatively smooth without obvious differences. The results of specific surface area and porosity analysis showed that they were significantly higher in demineralized bone powder than in nondemineralized bone powder, however, there was no significant difference between the two decalcification methods. The content of hydroxyproline in nondemineralized bone powder and EDTA-demineralized bone powder had no statistical difference, while HCl-demineralization had statistical significance compared with the former two, and the content increased with the decrease of particle size. The protein and BMP-2 extracted from HCl demineralized bone powder were significantly higher than that from nondemineralized bone powder and EDTA demineralized bone powder, and there were differences among different particle sizes. These results suggested the importance of demineralization mode and particle size of the allogenic bone powder and provided guidance for the choice of the most appropriate particle size and demineralization mode to be used in tissue bioengineering.
Collapse
Affiliation(s)
- Kun-Xiu Song
- Tianjin Medical University, Tianjin, China
- Department of Hand & Microsurgery, Binzhou Medical University Hospital, Binzhou, Shandong province, China
| | | | - Yong-Jie Zhao
- Department of Hand & Microsurgery, Binzhou Medical University Hospital, Binzhou, Shandong province, China
| | | | | | - Jing-Yu Zhang
- Department of Bone Tumor and Soft Tissue Oncology, Tianjin Hospital, 406 Jiefang Southern Road, Tianjin, 300211, China.
| | - Yong-Cheng Hu
- Department of Bone Tumor and Soft Tissue Oncology, Tianjin Hospital, 406 Jiefang Southern Road, Tianjin, 300211, China.
| |
Collapse
|
6
|
Zia S, Djalali-Cuevas A, Pflaum M, Hegermann J, Dipresa D, Kalozoumis P, Kouvaka A, Burgwitz K, Andriopoulou S, Repanas A, Will F, Grote K, Schrimpf C, Toumpaniari S, Mueller M, Glasmacher B, Haverich A, Morticelli L, Korossis S. Development of a dual-component infection-resistant arterial replacement for small-caliber reconstructions: A proof-of-concept study. Front Bioeng Biotechnol 2023; 11:957458. [PMID: 36741762 PMCID: PMC9889865 DOI: 10.3389/fbioe.2023.957458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 01/02/2023] [Indexed: 01/19/2023] Open
Abstract
Introduction: Synthetic vascular grafts perform poorly in small-caliber (<6mm) anastomoses, due to intimal hyperplasia and thrombosis, whereas homografts are associated with limited availability and immunogenicity, and bioprostheses are prone to aneurysmal degeneration and calcification. Infection is another important limitation with vascular grafting. This study developed a dual-component graft for small-caliber reconstructions, comprising a decellularized tibial artery scaffold and an antibiotic-releasing, electrospun polycaprolactone (PCL)/polyethylene glycol (PEG) blend sleeve. Methods: The study investigated the effect of nucleases, as part of the decellularization technique, and two sterilization methods (peracetic acid and γ-irradiation), on the scaffold's biological and biomechanical integrity. It also investigated the effect of different PCL/PEG ratios on the antimicrobial, biological and biomechanical properties of the sleeves. Tibial arteries were decellularized using Triton X-100 and sodium-dodecyl-sulfate. Results: The scaffolds retained the general native histoarchitecture and biomechanics but were depleted of glycosaminoglycans. Sterilization with peracetic acid depleted collagen IV and produced ultrastructural changes in the collagen and elastic fibers. The two PCL/PEG ratios used (150:50 and 100:50) demonstrated differences in the structural, biomechanical and antimicrobial properties of the sleeves. Differences in the antimicrobial activity were also found between sleeves fabricated with antibiotics supplemented in the electrospinning solution, and sleeves soaked in antibiotics. Discussion: The study demonstrated the feasibility of fabricating a dual-component small-caliber graft, comprising a scaffold with sufficient biological and biomechanical functionality, and an electrospun PCL/PEG sleeve with tailored biomechanics and antibiotic release.
Collapse
Affiliation(s)
- Sonia Zia
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Adrian Djalali-Cuevas
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Michael Pflaum
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Jan Hegermann
- Institute of Functional and Applied Anatomy, Research Core Unit Electron Microscopy, Hannover Medical School, Hannover, Germany
| | - Daniele Dipresa
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Panagiotis Kalozoumis
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Artemis Kouvaka
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Karin Burgwitz
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Sofia Andriopoulou
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Alexandros Repanas
- Institute for Multiphase Processes, Leibniz University Hannover, Hannover, Germany
| | - Fabian Will
- LLS ROWIAK LaserLabSolutions GmbH, Hannover, Germany
| | - Karsten Grote
- Cardiology and Angiology, Philipps-University Marburg, Marburg, Germany
| | - Claudia Schrimpf
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Sotiria Toumpaniari
- Cardiopulmonary Regenerative Engineering Group (CARE), Centre for Biological Engineering, Loughborough University, Loughborough, United Kingdom,Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, United Kingdom
| | - Marc Mueller
- Institute for Multiphase Processes, Leibniz University Hannover, Hannover, Germany
| | - Birgit Glasmacher
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany,Institute for Multiphase Processes, Leibniz University Hannover, Hannover, Germany
| | - Axel Haverich
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany,Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Lucrezia Morticelli
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany
| | - Sotirios Korossis
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, Hannover, Germany,Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany,Cardiopulmonary Regenerative Engineering Group (CARE), Centre for Biological Engineering, Loughborough University, Loughborough, United Kingdom,Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, United Kingdom,*Correspondence: Sotirios Korossis,
| |
Collapse
|
7
|
Lin AH, Slater CA, Martinez CJ, Eppell SJ, Yu SM, Weiss JA. Collagen fibrils from both positional and energy-storing tendons exhibit increased amounts of denatured collagen when stretched beyond the yield point. Acta Biomater 2023; 155:461-470. [PMID: 36400348 PMCID: PMC9805521 DOI: 10.1016/j.actbio.2022.11.018] [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: 07/14/2022] [Revised: 11/04/2022] [Accepted: 11/09/2022] [Indexed: 11/17/2022]
Abstract
Collagen molecules are the base structural unit of tendons, which become denatured during mechanical overload. We recently demonstrated that during tendon stretch, collagen denaturation occurs at the yield point of the stress-strain curve in both positional and energy-storing tendons. We were interested in investigating how this load is transferred throughout the collagen hierarchy, and sought to determine the onset of collagen denaturation when collagen fibrils are stretched. Fibrils are one level above the collagen molecule in the collagen hierarchy, allowing more direct probing of the effect of strain on collagen molecules. We isolated collagen fibrils from both positional and energy-storing tendon types and stretched them using a microelectromechanical system device to various levels of strain. We stained the fibrils with fluorescently labeled collagen hybridizing peptides that specifically bind to denatured collagen, and examined whether samples stretched beyond the yield point of the stress-strain curve exhibited increased amounts of denatured collagen. We found that collagen denaturation in collagen fibrils from both tendon types occurs at the yield point. Greater amounts of denatured collagen were found in post-yield positional fibrils than in energy-storing fibrils. This is despite a greater yield strain and yield stress in fibrils from energy-storing tendons compared to positional tendons. Interestingly, the peak modulus of collagen fibrils from both tendon types was the same. These results are likely explained by the greater crosslink density found in energy-storing tendons compared to positional tendons. The insights gained from this study could help management of tendon and other musculoskeletal injuries by targeting collagen molecular damage at the fibril level. STATEMENT OF SIGNIFICANCE: When tendons are stretched or torn, this can lead to collagen denaturation (damage). Depending on their biomechanical function, tendons are considered positional or energy-storing with different crosslink profiles. By stretching collagen fibrils instead of fascicles from both tendon types, we can more directly examine the effect of tensile stretch on the collagen molecule in tendons. We found that regardless of tendon type, collagen denaturation in fibrils occurs when they are stretched beyond the yield point of the stress-strain curve. This provides insight into how load affects different tendon sub-structures during tendon injuries and failure, which will help clinicians and researchers understand mechanisms of injuries and potentially target collagen molecular damage as a treatment strategy, leading to improved clinical outcomes following injury.
Collapse
Affiliation(s)
- Allen H Lin
- Department of Biomedical Engineering, University of Utah, United States; Scientific Computing and Imaging Institute, University of Utah, United States
| | - Christopher A Slater
- Department of Biomedical Engineering, Case Western Reserve University, United States
| | - Callie-Jo Martinez
- Department of Biomedical Engineering, University of Utah, United States; Scientific Computing and Imaging Institute, University of Utah, United States
| | - Steven J Eppell
- Department of Biomedical Engineering, Case Western Reserve University, United States
| | - S Michael Yu
- Department of Biomedical Engineering, University of Utah, United States; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, United States
| | - Jeffrey A Weiss
- Department of Biomedical Engineering, University of Utah, United States; Scientific Computing and Imaging Institute, University of Utah, United States; Department of Orthopaedics, University of Utah, United States.
| |
Collapse
|
8
|
Tluczynski K, Breiter R. A compositional analysis of native and decellularized porcine nasal septum cartilage. Xenotransplantation 2022; 29:e12781. [PMID: 36125176 DOI: 10.1111/xen.12781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 05/27/2022] [Accepted: 09/01/2022] [Indexed: 01/15/2023]
Abstract
OBJECTIVES Decellularization of porcine septum cartilage is necessary for its application as xenogenic replacement material. The aim of this study was to investigate spatial differences of structure and composition in the whole native and decellularized porcine nasal septum. Subsequently, the results shall be compared with studies of human nasal septum. METHODS Ten porcine nasal septa were divided into six regions from caudal to cephalic and four regions from dorsal to ventral to create a grid of 24 approximately equal segments. All segments of five septal cartilages were decellularized separately by a wet chemical multistep procedure. The segments were analyzed to determine quantitative amounts of total collagen, chondrocytes, and sulfated glycosaminoglycans (sGAG). RESULTS The distribution of cell number showed no significant differences between the individual regions. For the distribution of collagen and sGAG, no significant differences could be identified from caudal to cephalic, both in native and decellularized tissue. From dorsal to ventral, native and decellularized nasal septum showed significant differences between individual regions. In native septum, linear regression analysis indicated a decreasing collagen and an increasing sGAG content from dorsal to ventral. After decellularization, an increasing collagen and a decreasing sGAG content was detected. CONCLUSION The results of this study showed slightly but significant differences in the distribution of collagen and sGAG from dorsal to ventral. From caudal to cephalic, no differences could be observed. Compared to human, nasal septum differences in cell, collagen, and sGAG content were detected. Despite this, human and porcine nasal septum showed similar distributions and a consistently inverse linearity of collagen and sGAG content. Nevertheless, the midcaudal and midcephalic regions showed the highest porosity and a high stability and thus offer the best conditions for the revitalization of porcine tissue by human cells.
Collapse
Affiliation(s)
- Katharina Tluczynski
- Roman Breiter, Institute of Bioprocess Engineering, University of Erlangen-Nürnberg (FAU), Erlangen-Nürnberg, Germany
| | - Roman Breiter
- Roman Breiter, Institute of Bioprocess Engineering, University of Erlangen-Nürnberg (FAU), Erlangen-Nürnberg, Germany
| |
Collapse
|
9
|
Zhang H, Xu M, Zhang L, Zhang H, Yang L, Liu J, Zhang J, Hu Y. Effects of Chemical Sterilization and Gamma Irradiation on the Biochemical and Biomechanical Properties of Human Tendon Allografts In Vitro Study. Orthop Surg 2022; 14:2657-2668. [PMID: 36054510 PMCID: PMC9531057 DOI: 10.1111/os.13465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 07/10/2022] [Accepted: 07/25/2022] [Indexed: 11/29/2022] Open
Abstract
Objective Pre‐implantation sterilization procedures for tendons are important measures to reduce the risk of disease transmission, however these procedures may compromise tendon microarchitecture and biomechanical properties to varying degrees. We explore the effects of different sterilization procedures on the micro‐histology, biomechanical strength and biochemical properties of human tendon allografts in vitro study. Methods The tendon allografts were harvested from cadaveric donors after the donors were serologically screened by antibody or nucleic acid testing of infectious agents. All samples were divided into five groups, which were fresh‐frozen group (control group), 15 kGy gamma irradiation group, 25 kGy gamma irradiation group, 70% ethanol group, and peracetic acid‐ethanol group. Each group included 10 tendons for testing. Histological staining and transmission electron microscopy were applied to observe the internal structure and arrangement of tendon collagen fibers, while the machine learning classifier was trained to distinguish the darker cross‐sections of collagen fibers and brighter backgrounds of the electron micrograph to detect the distribution of diameters of tendon collagen fibers. The viscoelasticity, mechanical properties and material properties of tendon allografts were examined to detect the influence of different intervention factors on the biomechanical properties of tendons. Results Histological staining and transmission electron microscopy showed that the structure of fresh‐frozen tendons was similar to the structures of other experimental groups, and no obvious fiber disorder or delamination was observed. In the uniaxial cyclic test, the cyclic creep of 25 kGy irradiation group (1.5%) and peracetic acid‐ethanol group (1.5%) were significantly lower than that of the control group (3.6%, F = 1.52, P = 0.039) while in the load‐to‐failure test, the maximum elongation and maximum strain of the peracetic acid‐ethanol group were significantly higher than those of the control group (F = 4.60, P = 0.010), and there was no significant difference in other biomechanical indicators. According to the experimental results of denatured collagen, it could be seen that no matter which disinfection procedure was used, the denaturation of the tendon sample would be promoted (F = 1.97, P = 0.186), and high‐dose irradiation seemed to cause more damage to collagen fibers than the other two disinfection procedures (296.2 vs 171.1 vs 212.9 μg/g). Conclusion Biomechanical experiments and collagen denaturation tests showed that 15 kGy gamma irradiation and 70% ethanol can preserve the biomechanical strength and biochemical properties of tendons to the greatest extent, and these two sterilization methods are worthy of further promotion.
Collapse
Affiliation(s)
- Hao‐ran Zhang
- Department of Bone Tumor Tianjin Hospital Tianjin China
| | - Ming‐you Xu
- Graduate School Tianjin Medical University Tianjin China
| | - Lei Zhang
- Beijing Wonderful Medical Biomaterial Co. Ltd. Beijing China
| | - Hao Zhang
- Graduate School Tianjin Medical University Tianjin China
| | - Li Yang
- Graduate School Tianjin Medical University Tianjin China
| | - Jie Liu
- Graduate School Tianjin Medical University Tianjin China
| | - Jing‐yu Zhang
- Department of Bone Tumor Tianjin Hospital Tianjin China
| | - Yong‐cheng Hu
- Department of Bone Tumor Tianjin Hospital Tianjin China
| |
Collapse
|
10
|
The essential anti-angiogenic strategies in cartilage engineering and osteoarthritic cartilage repair. Cell Mol Life Sci 2022; 79:71. [PMID: 35029764 PMCID: PMC9805356 DOI: 10.1007/s00018-021-04105-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/01/2021] [Accepted: 12/18/2021] [Indexed: 01/16/2023]
Abstract
In the cartilage matrix, complex interactions occur between angiogenic and anti-angiogenic components, growth factors, and environmental stressors to maintain a proper cartilage phenotype that allows for effective load bearing and force distribution. However, as seen in both degenerative disease and tissue engineering, cartilage can lose its vascular resistance. This vascularization then leads to matrix breakdown, chondrocyte apoptosis, and ossification. Research has shown that articular cartilage inflammation leads to compromised joint function and decreased clinical potential for regeneration. Unfortunately, few articles comprehensively summarize what we have learned from previous investigations. In this review, we summarize our current understanding of the factors that stabilize chondrocytes to prevent terminal differentiation and applications of these factors to rescue the cartilage phenotype during cartilage engineering and osteoarthritis treatment. Inhibiting vascularization will allow for enhanced phenotypic stability so that we are able to develop more stable implants for cartilage repair and regeneration.
Collapse
|
11
|
Lin AH, Allan AN, Zitnay JL, Kessler JL, Yu SM, Weiss JA. Collagen denaturation is initiated upon tissue yield in both positional and energy-storing tendons. Acta Biomater 2020; 118:153-160. [PMID: 33035697 DOI: 10.1016/j.actbio.2020.09.056] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 09/04/2020] [Accepted: 09/30/2020] [Indexed: 12/12/2022]
Abstract
Tendons are collagenous soft tissues that transmit loads between muscles and bones. Depending on their anatomical function, tendons are classified as positional or energy-storing with differing biomechanical and biochemical properties. We recently demonstrated that during monotonic stretch of positional tendons, permanent denatured collagen begins accumulating upon departing the linear region of the stress-strain curve. However, it is unknown if this observation is true during mechanical overload of other types of tendons. Therefore, the purpose of this study was to investigate the onset of collagen denaturation relative to applied strain, and whether it differs between the two tendon types. Rat tail tendon (RTT) fascicles and rat flexor digitorum longus (FDL) tendons represented positional and energy-storing tendons, respectively. The samples were stretched to incremental levels of strain, then stained with fluorescently labeled collagen hybridizing peptides (CHPs); the CHP fluorescence was measured to quantify denatured collagen. Denatured collagen in both positional and energy-storing tendons began to increase at the yield strain, upon leaving the linear region of the stress-strain curve as the sample started to permanently deform. Despite significant differences between the two tendon types, it appears that collagen denaturation is initiated at tissue yield during monotonic stretch, and the fundamental mechanism of failure is the same for the two types of tendons. At tissue failure, positional tendons had double the percentage of denatured collagen compared to energy-storing tendons, with no difference between 0% control groups. These results help to elucidate the etiology of subfailure injury and rupture in functionally distinct tendons.
Collapse
Affiliation(s)
- Allen H Lin
- Department of Biomedical Engineering, University of Utah, United States; Scientific Computing and Imaging Institute, University of Utah, United States
| | - Alexandra N Allan
- Department of Biomedical Engineering, University of Utah, United States; Scientific Computing and Imaging Institute, University of Utah, United States
| | - Jared L Zitnay
- Department of Biomedical Engineering, University of Utah, United States; Scientific Computing and Imaging Institute, University of Utah, United States
| | - Julian L Kessler
- Department of Biomedical Engineering, University of Utah, United States
| | - S Michael Yu
- Department of Biomedical Engineering, University of Utah, United States; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, United States
| | - Jeffrey A Weiss
- Department of Biomedical Engineering, University of Utah, United States; Scientific Computing and Imaging Institute, University of Utah, United States; Department of Orthopaedics, University of Utah, United States.
| |
Collapse
|
12
|
Biosynthesis, characterization and evaluation of the supportive properties and biocompatibility of DBM nanoparticles on a tissue-engineered nerve conduit from decellularized sciatic nerve. Regen Ther 2020; 14:315-321. [PMID: 32467828 PMCID: PMC7243182 DOI: 10.1016/j.reth.2020.03.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/13/2020] [Accepted: 03/11/2020] [Indexed: 11/22/2022] Open
Abstract
In this study, we examined the supporting effects of nano-demineralized bone matrix on the cultivation of Wharton's jelly stem cells on acellularized nerve scaffold. Demineralized bone matrix nanoparticles were prepared and characterized by several experiments. Decellularized sciatic nerve scaffolds were prepared and their efficiency was evaluated using histological stainings and biomechanical testing. Results of histological staining indicated that the integrity of the extra cellular matrix components was preserved. Also, the growth and viability of WJSCs on the scaffolds were significantly higher in DBM nanoparticle groups. We conclude that supportive properties of nano-DBM groups showed better cell viability and a suitable microenvironment for proliferation, retention, and adhesion of cells compared with other groups.
Collapse
|
13
|
Zouhair S, Dal Sasso E, Tuladhar SR, Fidalgo C, Vedovelli L, Filippi A, Borile G, Bagno A, Marchesan M, De Rossi G, Gregori D, Wolkers WF, Romanato F, Korossis S, Gerosa G, Iop L. A Comprehensive Comparison of Bovine and Porcine Decellularized Pericardia: New Insights for Surgical Applications. Biomolecules 2020; 10:E371. [PMID: 32121155 PMCID: PMC7175169 DOI: 10.3390/biom10030371] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/15/2020] [Accepted: 02/17/2020] [Indexed: 12/11/2022] Open
Abstract
Xenogeneic pericardium-based substitutes are employed for several surgical indications after chemical shielding, limiting their biocompatibility and therapeutic durability. Adverse responses to these replacements might be prevented by tissue decellularization, ideally removing cells and preserving the original extracellular matrix (ECM). The aim of this study was to compare the mostly applied pericardia in clinics, i.e. bovine and porcine tissues, after their decellularization, and obtain new insights for their possible surgical use. Bovine and porcine pericardia were submitted to TRICOL decellularization, based on osmotic shock, detergents and nuclease treatment. TRICOL procedure resulted in being effective in cell removal and preservation of ECM architecture of both species' scaffolds. Collagen and elastin were retained but glycosaminoglycans were reduced, significantly for bovine scaffolds. Tissue hydration was varied by decellularization, with a rise for bovine pericardia and a decrease for porcine ones. TRICOL significantly increased porcine pericardial thickness, while a non-significant reduction was observed for the bovine counterpart. The protein secondary structure and thermal denaturation profile of both species' scaffolds were unaltered. Both pericardial tissues showed augmented biomechanical compliance after decellularization. The ECM bioactivity of bovine and porcine pericardia was unaffected by decellularization, sustaining viability and proliferation of human mesenchymal stem cells and endothelial cells. In conclusion, decellularized bovine and porcine pericardia demonstrate possessing the characteristics that are suitable for the creation of novel scaffolds for reconstruction or replacement: differences in water content, thickness and glycosaminoglycans might influence some of their biomechanical properties and, hence, their indication for surgical use.
Collapse
Affiliation(s)
- Sabra Zouhair
- Cardiovascular Regenerative Medicine, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
| | - Eleonora Dal Sasso
- Cardiovascular Regenerative Medicine, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
| | - Sugat R. Tuladhar
- Cardiovascular Regenerative Medicine, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
| | - Catia Fidalgo
- Cardiovascular Regenerative Medicine, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
| | - Luca Vedovelli
- Biostatistics, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
| | - Andrea Filippi
- Department of Physics and Astronomy "G. Galilei," University of Padua, I-35131 Padua, Italy
- Fondazione Bruno Kessler, I-38123 Trento, Italy
- Institute of Pediatric Research Città della Speranza, I-35127 Padua, Italy
| | - Giulia Borile
- Department of Physics and Astronomy "G. Galilei," University of Padua, I-35131 Padua, Italy
- Institute of Pediatric Research Città della Speranza, I-35127 Padua, Italy
- Department of Biomedical Sciences, University of Padua, I-35131 Padua, Italy
| | - Andrea Bagno
- Department of Industrial Engineering, University of Padua, I-35131 Padua, Italy
- L.I.F.E.L.A.B. Program, Consorzio per la Ricerca Sanitaria (CORIS), Veneto Region, I-35127 Padua, Italy
| | - Massimo Marchesan
- Cardiovascular Regenerative Medicine, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
| | | | - Dario Gregori
- Biostatistics, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
| | - Willem F. Wolkers
- Institute of Multiphase Processes, Leibniz Universität Hannover, D-30167 Hannover, Germany
| | - Filippo Romanato
- Department of Physics and Astronomy "G. Galilei," University of Padua, I-35131 Padua, Italy
- Institute of Pediatric Research Città della Speranza, I-35127 Padua, Italy
- L.I.F.E.L.A.B. Program, Consorzio per la Ricerca Sanitaria (CORIS), Veneto Region, I-35127 Padua, Italy
- Laboratory for Nanofabrication of Nanodevices, I-35127 Padua, Italy
| | - Sotirios Korossis
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, D-30625 Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Hannover Medical School, D-30625 Hannover, Germany
- Centre for Biological Engineering, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, Leicestershire, UK
| | - Gino Gerosa
- Cardiovascular Regenerative Medicine, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
- L.I.F.E.L.A.B. Program, Consorzio per la Ricerca Sanitaria (CORIS), Veneto Region, I-35127 Padua, Italy
| | - Laura Iop
- Cardiovascular Regenerative Medicine, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, I-35128 Padua, Italy
- L.I.F.E.L.A.B. Program, Consorzio per la Ricerca Sanitaria (CORIS), Veneto Region, I-35127 Padua, Italy
| |
Collapse
|
14
|
Laker L, Dohmen PM, Smit FE. Synergy in a detergent combination results in superior decellularized bovine pericardial extracellular matrix scaffolds. J Biomed Mater Res B Appl Biomater 2020; 108:2571-2578. [DOI: 10.1002/jbm.b.34588] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 01/14/2020] [Accepted: 02/02/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Leana Laker
- Department of Cardiothoracic Surgery, Faculty of Health SciencesUniversity of the Free State (UFS) Bloemfontein South Africa
| | - Pascal M. Dohmen
- Department of Cardiothoracic Surgery, Faculty of Health SciencesUniversity of the Free State (UFS) Bloemfontein South Africa
- Department of Cardiac Surgery, Heart Centre RostockUniversity of Rostock Rostock Germany
| | - Francis E. Smit
- Department of Cardiothoracic Surgery, Faculty of Health SciencesUniversity of the Free State (UFS) Bloemfontein South Africa
| |
Collapse
|
15
|
Rieppo L, Janssen L, Rahunen K, Lehenkari P, Finnilä MAJ, Saarakkala S. Histochemical quantification of collagen content in articular cartilage. PLoS One 2019; 14:e0224839. [PMID: 31697756 PMCID: PMC6837441 DOI: 10.1371/journal.pone.0224839] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 10/22/2019] [Indexed: 11/18/2022] Open
Abstract
Background Articular cartilage (AC) is mainly composed of water, type II collagen, proteoglycans (PGs) and chondrocytes. The amount of PGs in AC is routinely quantified with digital densitometry (DD) from Safranin O-stained sections, but it is unclear whether similar method could be used for collagens. Objective The aim of this study was to clarify whether collagens can be quantified from histological AC sections using DD. Material and methods Sixteen human AC samples were stained with Masson’s trichrome or Picrosirius red. Optical densities of histological stains were compared to two commonly used collagen parameters (amide I and collagen CH2 side chain peak at 1338cm-1) measured using Fourier Transform Infrared (FTIR) spectroscopic imaging. Results Optical density of Modified Masson’s trichrome staining, which included enzymatic removal of PGs before staining, correlated significantly with FTIR-derived collagen parameters at almost all depths of cartilage. The other studied staining protocols displayed significant correlations with the reference parameters at only few depth layers. Conclusions Based on our findings, modified Masson’s trichrome staining protocol is suitable for quantification of AC collagen content. Enzymatic removal of PGs prior to staining is critical as us allows better staining of the collagen. Further optimization of staining protocols may improve the results in the future studies.
Collapse
Affiliation(s)
- Lassi Rieppo
- Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland
- * E-mail:
| | - Lauriane Janssen
- Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland
- Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, Finland
| | - Krista Rahunen
- Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Petri Lehenkari
- Department of Surgery and Intensive Care, Oulu University Hospital, Oulu, Finland
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Mikko A. J. Finnilä
- Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Simo Saarakkala
- Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland
- Infotech Oulu, University of Oulu, Oulu, Finland
- Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland
| |
Collapse
|
16
|
Lin AH, Zitnay JL, Li Y, Yu SM, Weiss JA. Microplate assay for denatured collagen using collagen hybridizing peptides. J Orthop Res 2019; 37:431-438. [PMID: 30474872 PMCID: PMC6576259 DOI: 10.1002/jor.24185] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 11/13/2018] [Indexed: 02/04/2023]
Abstract
The purpose of this study was to develop a microplate assay for quantifying denatured collagen by measuring the fluorescence of carboxyfluorescein bound collagen hybridizing peptides (F-CHP). We have shown that F-CHP binds selectively with denatured collagen, and that mechanical overload of tendon fascicles causes collagen denaturation. Proteinase K was used to homogenize tissue samples after F-CHP staining, allowing fluorescence measurement using a microplate reader. We compared our new assay to our previous image analysis method and the trypsin-hydroxyproline assay, which is the only other available method to directly quantify denatured collagen. Relative quantification of denatured collagen was performed in rat tail tendon fascicles subjected to incremental tensile overload, and normal and ostoeoarthritic guinea pig cartilage. In addition, the absolute amount of denatured collagen was determined in rat tail tendon by correlating F-CHP fluorescence with percent denatured collagen as determined by the trypsin-hydroxyproline assay. Rat tail tendon fascicles stretched to low strains (<7.5%) exhibited minimal denatured collagen, but values rapidly increased at medium strains (7.5-10.5%) and plateaued at high strains (≥12%). Osteoarthritic cartilage had higher F-CHP fluorescence than healthy cartilage. Both of these outcomes are consistent with previous studies. With the calibration curve, the microplate assay was able to absolutely quantify denatured collagen in mechanically damaged rat tail tendon fascicles as reliably as the trypsin-hydroxyproline assay. Further, we achieved these results more efficiently than current methods in a rapid, high-throughput manner, with multiple types of collagenous tissue while maintaining accuracy. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:431-438, 2019.
Collapse
Affiliation(s)
- Allen H. Lin
- Department of Bioengineering, University of Utah,Scientific Computing and Imaging Institute, University of Utah
| | - Jared L. Zitnay
- Department of Bioengineering, University of Utah,Scientific Computing and Imaging Institute, University of Utah
| | - Yang Li
- Department of Bioengineering, University of Utah
| | - S. Michael Yu
- Department of Bioengineering, University of Utah,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah
| | - Jeffrey A. Weiss
- Department of Bioengineering, University of Utah,Scientific Computing and Imaging Institute, University of Utah,Department of Orthopaedics, University of Utah
| |
Collapse
|
17
|
Preservation strategies for decellularized pericardial scaffolds for off-the-shelf availability. Acta Biomater 2019; 84:208-221. [PMID: 30342283 DOI: 10.1016/j.actbio.2018.10.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 09/26/2018] [Accepted: 10/16/2018] [Indexed: 02/06/2023]
Abstract
Decellularized biological scaffolds hold great promise in cardiovascular surgery. In order to ensure off-the-shelf availability, routine use of decellularized scaffolds requires tissue banking. In this study, the suitability of cryopreservation, vitrification and freeze-drying for the preservation of decellularized bovine pericardial (DBP) scaffolds was evaluated. Cryopreservation was conducted using 10% DMSO and slow-rate freezing. Vitrification was performed using vitrification solution (VS83) and rapid cooling. Freeze-drying was done using a programmable freeze-dryer and sucrose as lyoprotectant. The impact of the preservation methods on the DBP extracellular matrix structure, integrity and composition was assessed using histology, biomechanical testing, spectroscopic and thermal analysis, and biochemistry. In addition, the cytocompatibility of the preserved scaffolds was also assessed. All preservation methods were found to be suitable to preserve the extracellular matrix structure and its components, with no apparent signs of collagen deterioration or denaturation, or loss of elastin and glycosaminoglycans. Biomechanical testing, however, showed that the cryopreserved DBP displayed a loss of extensibility compared to vitrified or freeze-dried scaffolds, which both displayed similar biomechanical behavior compared to non-preserved control scaffolds. In conclusion, cryopreservation altered the biomechanical behavior of the DBP scaffolds, which might lead to graft dysfunction in vivo. In contrast to cryopreservation and vitrification, freeze-drying is performed with non-toxic protective agents and does not require storage at ultra-low temperatures, thus allowing for a cost-effective and easy storage and transport. Due to these advantages, freeze-drying is a preferable method for the preservation of decellularized pericardium. STATEMENT OF SIGNIFICANCE: Clinical use of DBP scaffolds for surgical reconstructions or substitutions requires development of a preservation technology that does not alter scaffold properties during long-term storage. Conclusive investigation on adverse impacts of the preservation methods on DBP matrix integrity is still missing. This work is aiming to close this gap by studying three potential preservation technologies, cryopreservation, vitrification and freeze-drying, in order to achieve the off-the-shelf availability of DBP patches for clinical application. Furthermore, it provides novel insights for dry-preservation of decellularized xenogeneic scaffolds that can be used in the routine clinical cardiovascular practice, allowing the surgeon the opportunity to choose an ideal implant matching with the needs of each patient.
Collapse
|
18
|
DiDomenico CD, Kaghazchi A, Bonassar LJ. Measurement of local diffusion and composition in degraded articular cartilage reveals the unique role of surface structure in controlling macromolecular transport. J Biomech 2018; 82:38-45. [PMID: 30385000 DOI: 10.1016/j.jbiomech.2018.10.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/05/2018] [Accepted: 10/17/2018] [Indexed: 12/23/2022]
Abstract
Developing effective therapeutics for osteoarthritis (OA) necessitates that such molecules can reach and target chondrocytes within articular cartilage. However, predicting how well very large therapeutic molecules diffuse through cartilage is often difficult, and the relationship between local transport mechanics for these molecules and tissue heterogeneities in the tissue is still unclear. In this study, a 150 kDa antibody diffused through the articular surface of healthy and enzymatically degraded cartilage, which enabled the calculation of local diffusion mechanics in tissue with large compositional variations. Local cartilage composition and structure was quantified with Fourier transform infrared (FTIR) spectroscopy and second harmonic generation (SHG) imaging techniques. Overall, both local concentrations of aggrecan and collagen were correlated to local diffusivities for both healthy and surface-degraded samples (0.3 > R2 < 0.9). However, samples that underwent surface degradation by collagenase exhibited stronger correlations (R2 > 0.75) compared to healthy samples (R2 < 0.46), suggesting that the highly aligned collagen at the surface of cartilage acts as a barrier to macromolecular transport.
Collapse
Affiliation(s)
- Chris D DiDomenico
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, United States
| | - Aydin Kaghazchi
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, United States
| | - Lawrence J Bonassar
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, United States; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States.
| |
Collapse
|
19
|
Selective Enzymatic Digestion of Proteoglycans and Collagens Alters Cartilage T1rho and T2 Relaxation Times. Ann Biomed Eng 2018; 47:190-201. [PMID: 30288634 DOI: 10.1007/s10439-018-02143-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 09/26/2018] [Indexed: 12/21/2022]
Abstract
Our objective was to determine the relationship of T1rho and T2 relaxation mapping to the biochemical and biomechanical properties of articular cartilage through selective digestion of proteoglycans and collagens. Femoral condyles were harvested from porcine knee joints and treated with either chondroitinase ABC (cABC) followed by collagenase, or collagenase followed by cABC. Magnetic resonance images were acquired and cartilage explants were harvested for biochemical, biomechanical, and histological analyses before and after each digestion. Targeted enzymatic digestion of proteoglycans with cABC resulted in elevated T1rho relaxation times and decreased sulfated glycosaminoglycan content without affecting T2 relaxation times. In contrast, extractable collagen and T2 relaxation times were increased by collagenase digestion; however, neither was altered by cABC digestion. Aggregate modulus decreased with digestion of both components. Overall, we found that targeted digestion of proteoglycans and collagens had varying effects on biochemical, biomechanical, and imaging properties. T2 relaxation times were altered with changes in extractable collagen, but not changes in proteoglycan. However, T1rho relaxation times were altered with proteoglycan loss, which may also coincide with collagen disruption. Since it is unclear which matrix components are disrupted first in osteoarthritis, both markers may be important for tracking disease progression.
Collapse
|
20
|
Aldridge A, Desai A, Owston H, Jennings LM, Fisher J, Rooney P, Kearney JN, Ingham E, Wilshaw SP. Development and characterisation of a large diameter decellularised vascular allograft. Cell Tissue Bank 2018; 19:287-300. [PMID: 29188402 PMCID: PMC6133183 DOI: 10.1007/s10561-017-9673-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 11/19/2017] [Indexed: 11/30/2022]
Abstract
The aims of this study were to develop a biological large diameter vascular graft by decellularisation of native human aorta to remove the immunogenic cells whilst retaining the essential biomechanical, and biochemical properties for the ultimate benefit of patients with infected synthetic grafts. Donor aortas (n = 6) were subjected to an adaptation of a propriety decellularisation process to remove the cells and acellularity assessed by histological analysis and extraction and quantification of total DNA. The biocompatibility of the acellular aortas was determined using standard contact cytotoxicity tests. Collagen and denatured collagen content of aortas was determined and immunohistochemistry was used to determine the presence of specific extracellular matrix proteins. Donor aortas (n = 6) were divided into two, with one half subject to decellularisation and the other half retained as native tissue. The native and decellularised aorta sections were then subject to uniaxial tensile testing to failure [axial and circumferential directions] and suture retention testing. The data was compared using a paired t-test. Histological evaluation showed an absence of cells in the treated aortas and retention of histoarchitecture including elastin content. The decellularised aortas had less than 15 ng mg-1 total DNA per dry weight (mean 94% reduction) and were biocompatible as determined by in vitro contact cytotoxicity tests. There were no gross changes in the histoarchitecture [elastin and collagen matrix] of the acellular aortas compared to native controls. The decellularisation process also reduced calcium deposits within the tissue. The uniaxial tensile and suture retention testing revealed no significant differences in the material properties (p > 0.05) of decellularised aorta. The decellularisation procedure resulted in minimal changes to the biological and biomechanical properties of the donor aortas. Acellular donor aorta has excellent potential for use as a large diameter vascular graft.
Collapse
Affiliation(s)
- A Aldridge
- Institute of Medical and Biological Engineering, School of Biomedical Sciences, The University of Leeds, Leeds, LS2 9JT, UK.
| | - A Desai
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, The University of Leeds, Leeds, LS2 9JT, UK
| | - H Owston
- Institute of Medical and Biological Engineering, School of Biomedical Sciences, The University of Leeds, Leeds, LS2 9JT, UK
| | - L M Jennings
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, The University of Leeds, Leeds, LS2 9JT, UK
| | - J Fisher
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, The University of Leeds, Leeds, LS2 9JT, UK
| | - P Rooney
- NHS Blood and Transplant Tissue and Eye Services, 14 Estuary Banks, Estuary Commerce Park, Speke, Liverpool, L24 8RB, UK
| | - J N Kearney
- NHS Blood and Transplant Tissue and Eye Services, 14 Estuary Banks, Estuary Commerce Park, Speke, Liverpool, L24 8RB, UK
| | - E Ingham
- Institute of Medical and Biological Engineering, School of Biomedical Sciences, The University of Leeds, Leeds, LS2 9JT, UK
| | - S P Wilshaw
- Institute of Medical and Biological Engineering, School of Biomedical Sciences, The University of Leeds, Leeds, LS2 9JT, UK
| |
Collapse
|
21
|
de Paz-Lugo P, Lupiáñez JA, Meléndez-Hevia E. High glycine concentration increases collagen synthesis by articular chondrocytes in vitro: acute glycine deficiency could be an important cause of osteoarthritis. Amino Acids 2018; 50:1357-1365. [PMID: 30006659 PMCID: PMC6153947 DOI: 10.1007/s00726-018-2611-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 06/28/2018] [Indexed: 12/12/2022]
Abstract
Collagen synthesis is severely diminished in osteoarthritis; thus, enhancing it may help the regeneration of cartilage. This requires large amounts of glycine, proline and lysine. Previous works of our group have shown that glycine is an essential amino acid, which must be present in the diet in large amounts to satisfy the demands for collagen synthesis. Other authors have shown that proline is conditionally essential. In this work we studied the effect of these amino acids on type II collagen synthesis. Bovine articular chondrocytes were cultured under a wide range of different concentrations of glycine, proline and lysine. Chondrocytes were characterized by type II collagen immunocytochemistry of confluence monolayer cultures. Cell growth and viability were assayed by trypan blue dye exclusion method. Type II collagen was measured in the monolayer, every 48 h for 15 days by ELISA. Increase in concentrations of proline and lysine in the culture medium enhances the synthesis of type II collagen at low concentrations, but these effects decay before 1.0 mM. Increase of glycine as of 1.0 mM exceeds these effects and this increase continues more persistently by 60–75%. Since the large effects produced by proline and lysine are within the physiological range, while the effect of glycine corresponds to a much higher range, these results demonstrated a severe glycine deficiency for collagen synthesis. Thus, increasing glycine in the diet may well be a strategy for helping cartilage regeneration by enhancing collagen synthesis, which could contribute to the treatment and prevention of osteoarthritis.
Collapse
Affiliation(s)
- Patricia de Paz-Lugo
- Instituto del Metabolismo Celular, Calle Manuel de Falla nº15, La Laguna, 38208, Tenerife, Spain.,Universidad Internacional de La Rioja, Facultad de Educación, Avenida de la Paz nº137, 26002, Logroño, Spain
| | - José Antonio Lupiáñez
- Universidad de Granada, Facultad de Ciencias, Departamento de Bioquímica y Biología Molecular I, Avenida Fuente Nueva nº1, 18071, Granada, Spain
| | - Enrique Meléndez-Hevia
- Instituto del Metabolismo Celular, Calle Manuel de Falla nº15, La Laguna, 38208, Tenerife, Spain.
| |
Collapse
|
22
|
Potential enhancement of articular cartilage histological grading with collagen integrity. Clin Biomech (Bristol, Avon) 2018; 56:1-10. [PMID: 29730264 DOI: 10.1016/j.clinbiomech.2018.04.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 02/27/2018] [Accepted: 04/25/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Histological evaluation of articular cartilage, such as using the Mankin scoring system, is the gold standard for characterization of tissue integrity. This scoring system takes into account several parameters indicative of the tissue's health; however, the collagen integrity, which is a primary indicator of cartilage health is not taken into consideration. Thus, there is need to enhance histological grading of articular cartilage by incorporating explicit scoring of collagen degeneration into the Modified Mankin grading system. This paper explores a new histological grading parameter for collagen network degradation and how this information can be used to augment a widely used grading scheme like the Modified Mankin grading system. METHODS Intact and degenerated human cartilage were examined histologically and then subjected to second harmonic generation imaging, leading to qualitative and quantitative description of collagen disruption emanating from the surface to subsurface layers of the tissue. This data was then incorporated into the Modified Mankin grading system. FINDINGS Second harmonic generation image analysis reveals a relationship between changes in collagen architecture and histologically observed tissue disruption in degenerated articular cartilage. INTERPRETATION Histological tissue disruption in degenerated human articular cartilage is directly related to the reorganization of collagen fibrils in the form of intense fibril aggregation, either as a result of degeneration or aging. This method of mapping disrupted tissue regions to quantitative collagen fibril damage can be coded into cartilage grading systems and could inform clinical practice and scientific research.
Collapse
|
23
|
Topol H, Gou K, Demirkoparan H, Pence TJ. Hyperelastic modeling of the combined effects of tissue swelling and deformation-related collagen renewal in fibrous soft tissue. Biomech Model Mechanobiol 2018; 17:1543-1567. [DOI: 10.1007/s10237-018-1043-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 06/12/2018] [Indexed: 12/01/2022]
|
24
|
Ignat’eva NY, Zakharkina OL, Dadasheva AR, Sadekova AR, Bagratashvili VN, Lunin VV. Features of Laser-Induced Modification of Sclera and Cornea. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s0036024418040076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
25
|
Iranpour S, Mahdavi-Shahri N, Miri R, Hasanzadeh H, Bidkhori HR, Naderi-Meshkin H, Zahabi E, Matin MM. Supportive properties of basement membrane layer of human amniotic membrane enable development of tissue engineering applications. Cell Tissue Bank 2018; 19:357-371. [PMID: 29313189 DOI: 10.1007/s10561-017-9680-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 12/22/2017] [Indexed: 10/18/2022]
Abstract
Human amniotic membrane (HAM) has been widely used as a natural scaffold in tissue engineering due to many of its unique biological properties such as providing growth factors, cytokines and tissue inhibitors of metalloproteinases. This study aimed at finding the most suitable and supportive layer of HAM as a delivery system for autologous or allogeneic cell transplantation. Three different layers of HAM were examined including basement membrane, epithelial and stromal layers. In order to prepare the basement membrane, de-epithelialization was performed using 0.5 M NaOH and its efficiency was investigated by histological stainings, DNA quantification, biomechanical testing and electron microscopy. Adipose-derived stromal cells (ASCs) and a human immortalized keratinocyte cell line (HaCaT) were seeded on the three different layers of HAM and cultured for 3 weeks. The potential of the three different layers of HAM to support the attachment and viability of cells were then monitored by histology, electron microscopy and (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Moreover, mechanical strengths of the basement membrane were assessed before and after cell culture. The results indicated that the integrity of extra cellular matrix (ECM) components was preserved after de-epithelialization and resulted in producing an intact basement amniotic membrane (BAM). Moreover, all three layers of HAM could support the attachment and proliferation of cells with no visible cytotoxic effects. However, the growth and viability of both cell types on the BAM were significantly higher than the other two layers. We conclude that growth stimulating effectors of BAM and its increased mechanical strength after culturing of ASCs, besides lack of immunogenicity make it an ideal model for delivering allogeneic cells and tissue engineering applications.
Collapse
Affiliation(s)
- Sonia Iranpour
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Nasser Mahdavi-Shahri
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Raheleh Miri
- Research Center for HIV/AIDS, HTLV and Viral Hepatitis, ACECR-Khorasan Razavi Branch, Mashhad, Iran
| | - Halimeh Hasanzadeh
- Stem Cells and Regenerative Medicine Research Group, ACECR-Khorasan Razavi Branch, Mashhad, Iran
| | - Hamid Reza Bidkhori
- Stem Cells and Regenerative Medicine Research Group, ACECR-Khorasan Razavi Branch, Mashhad, Iran
| | - Hojjat Naderi-Meshkin
- Stem Cells and Regenerative Medicine Research Group, ACECR-Khorasan Razavi Branch, Mashhad, Iran
| | - Ehsan Zahabi
- Dental Materials Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam M Matin
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran. .,Stem Cells and Regenerative Medicine Research Group, ACECR-Khorasan Razavi Branch, Mashhad, Iran. .,Novel Diagnostics and Therapeutics Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran.
| |
Collapse
|
26
|
Overhydroxylation of Lysine of Collagen Increases Uterine Fibroids Proliferation: Roles of Lysyl Hydroxylases, Lysyl Oxidases, and Matrix Metalloproteinases. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5316845. [PMID: 29082249 PMCID: PMC5610812 DOI: 10.1155/2017/5316845] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 07/20/2017] [Indexed: 11/23/2022]
Abstract
The role of the extracellular matrix (ECM) in uterine fibroids (UF) has recently been appreciated. Overhydroxylation of lysine residues and the subsequent formation of hydroxylysylpyridinoline (HP) and lysylpyridinoline (LP) cross-links underlie the ECM stiffness and profoundly affect tumor progression. The aim of the current study was to investigate the relationship between ECM of UF, collagen and collagen cross-linking enzymes [lysyl hydroxylases (LH) and lysyl oxidases (LOX)], and the development and progression of UF. Our results indicated that hydroxyl lysine (Hyl) and HP cross-links are significantly higher in UF compared to the normal myometrial tissues accompanied by increased expression of LH (LH2b) and LOX. Also, increased resistance to matrix metalloproteinases (MMP) proteolytic degradation activity was observed. Furthermore, the extent of collagen cross-links was positively correlated with the expression of myofibroblast marker (α-SMA), growth-promoting markers (PCNA; pERK1/2; FAKpY397; Ki-67; and Cyclin D1), and the size of UF. In conclusion, our study defines the role of overhydroxylation of collagen and collagen cross-linking enzymes in modulating UF cell proliferation, differentiation, and resistance to MMP. These effects can establish microenvironment conducive for UF progression and thus represent potential target treatment options of UF.
Collapse
|
27
|
Development and Characterization of a Porcine Mitral Valve Scaffold for Tissue Engineering. J Cardiovasc Transl Res 2017; 10:374-390. [PMID: 28462436 DOI: 10.1007/s12265-017-9747-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 04/10/2017] [Indexed: 10/19/2022]
Abstract
Decellularized scaffolds represent a promising alternative for mitral valve (MV) replacement. This work developed and characterized a protocol for the decellularization of whole MVs. Porcine MVs were decellularized with 0.5% (w/v) SDS and 0.5% (w/v) SD and sterilized with 0.1% (v/v) PAA. Decellularized samples were seeded with human foreskin fibroblasts and human adipose-derived stem cells to investigate cellular repopulation and infiltration, and with human colony-forming endothelial cells to investigate collagen IV formation. Histology revealed an acellular scaffold with a generally conserved histoarchitecture, but collagen IV loss. Following decellularization, no significant changes were observed in the hydroxyproline content, but there was a significant reduction in the glycosaminoglycan content. SEM/TEM analysis confirmed cellular removal and loss of some extracellular matrix components. Collagen and elastin were generally preserved. The endothelial cells produced newly formed collagen IV on the non-cytotoxic scaffold. The protocol produced acellular scaffolds with generally preserved histoarchitecture, biochemistry, and biomechanics.
Collapse
|
28
|
Gelse K, Körber L, Schöne M, Raum K, Koch P, Pachowsky M, Welsch G, Breiter R. Transplantation of Chemically Processed Decellularized Meniscal Allografts. Cartilage 2017; 8:180-190. [PMID: 28345410 PMCID: PMC5358822 DOI: 10.1177/1947603516646161] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Objective The aim of this study was to evaluate the chondroprotective effect of chemically decellularized meniscal allografts transplanted into the knee joints of adult merino sheep. Methods Lateral sheep meniscal allografts were chemically processed by a multistep method to yield acellular, sterile grafts. The grafts were transplanted into the knee joints of sheep that were treated by lateral meniscectomy. Joints treated by meniscectomy only and untreated joints served as controls. The joints were analyzed morphologically 6 and 26 weeks after surgery by the macroscopical and histological OARSI (Osteoarthritis Research Society International) score. Additionally, the meniscal grafts were biomechanically tested by cyclic indentation. Results Lateral meniscectomy was associated with significant degenerative changes of the articular cartilage of the lateral joint compartment. Transplanted lateral meniscal allografts retained their integrity during the observation period without inducing significant synovitis or foreign body reactions. Cellular repopulation of the grafts was only present on the surface and the periphery of the lateral meniscus, but was still completely lacking in the center of the grafts at week 26. Transplantation of processed meniscal allografts could not prevent degenerative changes of the articular cartilage in the lateral joint compartment. Compared with healthy menisci, the processed grafts were characterized by a significantly reduced dynamic modulus, which did not improve during the observation period of 26 weeks in vivo. Conclusion Chemically decellularized meniscal allografts proved their biocompatibility and durability without inducing immunogenic reactions. However, insufficient recellularization and inferior stiffness of the grafts hampered chondroprotective effects on the articular cartilage.
Collapse
Affiliation(s)
- Kolja Gelse
- Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, Erlangen, Germany,Kolja Gelse, Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, Krankenhausstraße 12, 91054 Erlangen, Germany.
| | - Ludwig Körber
- Institute of Bioprocess Engineering, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Martin Schöne
- Berlin Brandenburg School for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Kay Raum
- Berlin Brandenburg School for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Peter Koch
- Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, Erlangen, Germany
| | - Milena Pachowsky
- Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, Erlangen, Germany
| | - Götz Welsch
- Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, Erlangen, Germany
| | - Roman Breiter
- Institute of Bioprocess Engineering, University of Erlangen-Nürnberg, Erlangen, Germany
| |
Collapse
|
29
|
Hatcher CC, Collins AT, Kim SY, Michel LC, Mostertz WC, Ziemian SN, Spritzer CE, Guilak F, DeFrate LE, McNulty AL. Relationship between T1rho magnetic resonance imaging, synovial fluid biomarkers, and the biochemical and biomechanical properties of cartilage. J Biomech 2017; 55:18-26. [PMID: 28237185 DOI: 10.1016/j.jbiomech.2017.02.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 01/27/2017] [Accepted: 02/01/2017] [Indexed: 01/01/2023]
Abstract
Non-invasive techniques for quantifying early biochemical and biomechanical changes in articular cartilage may provide a means of more precisely assessing osteoarthritis (OA) progression. The goals of this study were to determine the relationship between T1rho magnetic resonance (MR) imaging relaxation times and changes in cartilage composition, cartilage mechanical properties, and synovial fluid biomarker levels and to demonstrate the application of T1rho imaging to evaluate cartilage composition in human subjects in vivo. Femoral condyles and synovial fluid were harvested from healthy and OA porcine knee joints. Sagittal T1rho relaxation MR images of the condyles were acquired. OA regions of OA joints exhibited an increase in T1rho relaxation times as compared to non-OA regions. Furthermore in these regions, cartilage sGAG content and aggregate modulus decreased, while percent degraded collagen and water content increased. In OA joints, synovial fluid concentrations of sGAG decreased and C2C concentrations increased compared to healthy joints. T1rho relaxation times were negatively correlated with cartilage and synovial fluid sGAG concentrations and aggregate modulus and positively correlated with water content and permeability. Additionally, we demonstrated the application of these in vitro findings to the study of human subjects. Specifically, we demonstrated that walking results in decreased T1rho relaxation times, consistent with water exudation and an increase in proteoglycan concentration with in vivo loading. Together, these findings demonstrate that cartilage MR imaging and synovial fluid biomarkers provide powerful non-invasive tools for characterizing changes in the biochemical and biomechanical environments of the joint.
Collapse
Affiliation(s)
- Courtney C Hatcher
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Amber T Collins
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Sophia Y Kim
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Lindsey C Michel
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - William C Mostertz
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Sophia N Ziemian
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Charles E Spritzer
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | - Farshid Guilak
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Louis E DeFrate
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Amy L McNulty
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA.
| |
Collapse
|
30
|
van Tiel J, Siebelt M, Reijman M, Bos PK, Waarsing JH, Zuurmond AM, Nasserinejad K, van Osch GJVM, Verhaar JAN, Krestin GP, Weinans H, Oei EHG. Quantitative in vivo CT arthrography of the human osteoarthritic knee to estimate cartilage sulphated glycosaminoglycan content: correlation with ex-vivo reference standards. Osteoarthritis Cartilage 2016; 24:1012-20. [PMID: 26851449 DOI: 10.1016/j.joca.2016.01.137] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 12/24/2015] [Accepted: 01/19/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Recently, computed tomography arthrography (CTa) was introduced as quantitative imaging biomarker to estimate cartilage sulphated glycosaminoglycan (sGAG) content in human cadaveric knees. Our aim was to assess the correlation between in vivo CTa in human osteoarthritis (OA) knees and ex vivo reference standards for sGAG and collagen content. DESIGN In this prospective observational study 11 knee OA patients underwent CTa before total knee replacement (TKR). Cartilage X-ray attenuation was determined in six cartilage regions. Femoral and tibial cartilage specimens harvested during TKR were re-scanned using equilibrium partitioning of an ionic contrast agent with micro-CT (EPIC-μCT), which served as reference standard for sGAG. Next, cartilage sGAG and collagen content were determined using dimethylmethylene blue (DMMB) and hydroxyproline assays. The correlation between CTa X-ray attenuation, EPIC-μCT X-ray attenuation, sGAG content and collagen content was assessed. RESULTS CTa X-ray attenuation correlated well with EPIC-μCT (r = 0.76, 95% credibility interval (95%CI) 0.64 to 0.85). CTa correlated moderately with the DMMB assay (sGAG content) (r = -0.66, 95%CI -0.87 to -0.49) and to lesser extent with the hydroxyproline assay (collagen content) (r = -0.56, 95%CI -0.70 to -0.36). CONCLUSIONS Outcomes of in vivo CTa in human OA knees correlate well with sGAG content. Outcomes of CTa also slightly correlate with cartilage collagen content. Since outcomes of CTa are mainly sGAG dependent and despite the fact that further validation using hyaline cartilage of other joints with different biochemical composition should be conducted, CTa may be suitable as quantitative imaging biomarker to estimate cartilage sGAG content in future clinical OA research.
Collapse
Affiliation(s)
- J van Tiel
- Department of Orthopedic Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands; Department of Radiology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - M Siebelt
- Department of Orthopedic Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - M Reijman
- Department of Orthopedic Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - P K Bos
- Department of Orthopedic Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - J H Waarsing
- Department of Orthopedic Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | | | - K Nasserinejad
- Department of Biostatistics, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - G J V M van Osch
- Department of Orthopedic Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands; Department of Otorhinolaryngology, Erasmus MC, University Medical Center Rotterdam, The Netherlands.
| | - J A N Verhaar
- Department of Orthopedic Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - G P Krestin
- Department of Radiology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - H Weinans
- Department of Biomechanical Engineering, Delft University of Technology, Delft, The Netherlands; Department of Orthopedics and Department of Rheumatology, University Medical Center Utrecht, Utrecht, The Netherlands.
| | - E H G Oei
- Department of Radiology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| |
Collapse
|
31
|
Argyropoulos AJ, Robichaud P, Balimunkwe RM, Fisher GJ, Hammerberg C, Yan Y, Quan T. Alterations of Dermal Connective Tissue Collagen in Diabetes: Molecular Basis of Aged-Appearing Skin. PLoS One 2016; 11:e0153806. [PMID: 27104752 PMCID: PMC4841569 DOI: 10.1371/journal.pone.0153806] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 04/04/2016] [Indexed: 12/15/2022] Open
Abstract
Alterations of the collagen, the major structural protein in skin, contribute significantly to human skin connective tissue aging. As aged-appearing skin is more common in diabetes, here we investigated the molecular basis of aged-appearing skin in diabetes. Among all known human matrix metalloproteinases (MMPs), diabetic skin shows elevated levels of MMP-1 and MMP-2. Laser capture microdissection (LCM) coupled real-time PCR indicated that elevated MMPs in diabetic skin were primarily expressed in the dermis. Furthermore, diabetic skin shows increased lysyl oxidase (LOX) expression and higher cross-linked collagens. Atomic force microscopy (AFM) further indicated that collagen fibrils were fragmented/disorganized, and key mechanical properties of traction force and tensile strength were increased in diabetic skin, compared to intact/well-organized collagen fibrils in non-diabetic skin. In in vitro tissue culture system, multiple MMPs including MMP-1 and MM-2 were induced by high glucose (25 mM) exposure to isolated primary human skin dermal fibroblasts, the major cells responsible for collagen homeostasis in skin. The elevation of MMPs and LOX over the years is thought to result in the accumulation of fragmented and cross-linked collagen, and thus impairs dermal collagen structural integrity and mechanical properties in diabetes. Our data partially explain why old-looking skin is more common in diabetic patients.
Collapse
Affiliation(s)
- Angela J. Argyropoulos
- Department of Psychiatry, University of Washington, Seattle, Washington, United States of America
| | - Patrick Robichaud
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Rebecca Mutesi Balimunkwe
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Gary J. Fisher
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Craig Hammerberg
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Yan Yan
- Department of Dermatology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Taihao Quan
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
- * E-mail:
| |
Collapse
|
32
|
Nims RJ, Durney KM, Cigan AD, Dusséaux A, Hung CT, Ateshian GA. Continuum theory of fibrous tissue damage mechanics using bond kinetics: application to cartilage tissue engineering. Interface Focus 2016; 6:20150063. [PMID: 26855751 DOI: 10.1098/rsfs.2015.0063] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This study presents a damage mechanics framework that employs observable state variables to describe damage in isotropic or anisotropic fibrous tissues. In this mixture theory framework, damage is tracked by the mass fraction of bonds that have broken. Anisotropic damage is subsumed in the assumption that multiple bond species may coexist in a material, each having its own damage behaviour. This approach recovers the classical damage mechanics formulation for isotropic materials, but does not appeal to a tensorial damage measure for anisotropic materials. In contrast with the classical approach, the use of observable state variables for damage allows direct comparison of model predictions to experimental damage measures, such as biochemical assays or Raman spectroscopy. Investigations of damage in discrete fibre distributions demonstrate that the resilience to damage increases with the number of fibre bundles; idealizing fibrous tissues using continuous fibre distribution models precludes the modelling of damage. This damage framework was used to test and validate the hypothesis that growth of cartilage constructs can lead to damage of the synthesized collagen matrix due to excessive swelling caused by synthesized glycosaminoglycans. Therefore, alternative strategies must be implemented in tissue engineering studies to prevent collagen damage during the growth process.
Collapse
Affiliation(s)
- Robert J Nims
- Department of Biomedical Engineering , Columbia University , 500 West 120th Street, MC4703, New York, NY 10027 , USA
| | - Krista M Durney
- Department of Biomedical Engineering , Columbia University , 500 West 120th Street, MC4703, New York, NY 10027 , USA
| | - Alexander D Cigan
- Department of Biomedical Engineering , Columbia University , 500 West 120th Street, MC4703, New York, NY 10027 , USA
| | - Antoine Dusséaux
- Department of Mechanical Engineering , Columbia University , 500 West 120th Street, MC4703, New York, NY 10027 , USA
| | - Clark T Hung
- Department of Biomedical Engineering , Columbia University , 500 West 120th Street, MC4703, New York, NY 10027 , USA
| | - Gerard A Ateshian
- Department of Biomedical Engineering, Columbia University, 500 West 120th Street, MC4703, New York, NY 10027, USA; Department of Mechanical Engineering, Columbia University, 500 West 120th Street, MC4703, New York, NY 10027, USA
| |
Collapse
|
33
|
van Tiel J, Kotek G, Reijman M, Bos PK, Bron EE, Klein S, Nasserinejad K, van Osch GJVM, Verhaar JAN, Krestin GP, Weinans H, Oei EHG. Is T1ρ Mapping an Alternative to Delayed Gadolinium-enhanced MR Imaging of Cartilage in the Assessment of Sulphated Glycosaminoglycan Content in Human Osteoarthritic Knees? An in Vivo Validation Study. Radiology 2015; 279:523-31. [PMID: 26588020 DOI: 10.1148/radiol.2015150693] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
PURPOSE To determine if T1ρ mapping can be used as an alternative to delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) in the quantification of cartilage biochemical composition in vivo in human knees with osteoarthritis. MATERIALS AND METHODS This study was approved by the institutional review board. Written informed consent was obtained from all participants. Twelve patients with knee osteoarthritis underwent dGEMRIC and T1ρ mapping at 3.0 T before undergoing total knee replacement. Outcomes of dGEMRIC and T1ρ mapping were calculated in six cartilage regions of interest. Femoral and tibial cartilages were harvested during total knee replacement. Cartilage sulphated glycosaminoglycan (sGAG) and collagen content were assessed with dimethylmethylene blue and hydroxyproline assays, respectively. A four-dimensional multivariate mixed-effects model was used to simultaneously assess the correlation between outcomes of dGEMRIC and T1ρ mapping and the sGAG and collagen content of the articular cartilage. RESULTS T1 relaxation times at dGEMRIC showed strong correlation with cartilage sGAG content (r = 0.73; 95% credibility interval [CI] = 0.60, 0.83) and weak correlation with cartilage collagen content (r = 0.40; 95% CI: 0.18, 0.58). T1ρ relaxation times did not correlate with cartilage sGAG content (r = 0.04; 95% CI: -0.21, 0.28) or collagen content (r = -0.05; 95% CI = -0.31, 0.20). CONCLUSION dGEMRIC can help accurately measure cartilage sGAG content in vivo in patients with knee osteoarthritis, whereas T1ρ mapping does not appear suitable for this purpose. Although the technique is not completely sGAG specific and requires a contrast agent, dGEMRIC is a validated and robust method for quantifying cartilage sGAG content in human osteoarthritis subjects in clinical research.
Collapse
Affiliation(s)
- Jasper van Tiel
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Gyula Kotek
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Max Reijman
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Pieter K Bos
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Esther E Bron
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Stefan Klein
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Kazem Nasserinejad
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Gerjo J V M van Osch
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Jan A N Verhaar
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Gabriel P Krestin
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Harrie Weinans
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| | - Edwin H G Oei
- From the Departments of Radiology (J.v.T., G.K., E.E.B., S.K., G.P.K., E.H.G.O.), Orthopedic Surgery (J.v.T., M.R., P.K.B., G.J.V.M.v.O., J.A.N.V.), Medical Informatics (E.E.B., S.K.), Biostatistics (K.N.), and Otorhinolaryngology (G.J.V.M.v.O.), Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands (H.W.); and Department of Orthopedics and Rheumatology, University Medical Center Utrecht, Utrecht, the Netherlands (H.W.)
| |
Collapse
|
34
|
Liang W, Verschuren L, Mulder P, van der Hoorn JWA, Verheij J, van Dam AD, Boon MR, Princen HMG, Havekes LM, Kleemann R, van den Hoek AM. Salsalate attenuates diet induced non-alcoholic steatohepatitis in mice by decreasing lipogenic and inflammatory processes. Br J Pharmacol 2015; 172:5293-305. [PMID: 26292849 DOI: 10.1111/bph.13315] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 08/10/2015] [Accepted: 08/13/2015] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND AND PURPOSE Salsalate (salicylsalicylic acid) is an anti-inflammatory drug that was recently found to exert beneficial metabolic effects on glucose and lipid metabolism. Although its utility in the prevention and management of a wide range of vascular disorders, including type 2 diabetes and metabolic syndrome has been suggested before, the potential of salsalate to protect against non-alcoholic steatohepatitis (NASH) remains unclear. The aim of the present study was therefore to ascertain the effects of salsalate on the development of NASH. EXPERIMENTAL APPROACH Transgenic APOE*3Leiden.CETP mice were fed a high-fat and high-cholesterol diet with or without salsalate for 12 and 20 weeks. The effects on body weight, plasma biochemical variables, liver histology and hepatic gene expression were assessed. KEY RESULTS Salsalate prevented weight gain, improved dyslipidemia and insulin resistance and ameliorated diet-induced NASH, as shown by decreased hepatic microvesicular and macrovesicular steatosis, reduced hepatic inflammation and reduced development of fibrosis. Salsalate affected lipid metabolism by increasing β-oxidation and decreasing lipogenesis, as shown by the activation of PPAR-α, PPAR-γ co-activator 1β, RXR-α and inhibition of genes controlled by the transcription factor MLXIPL/ChREBP. Inflammation was reduced by down-regulation of the NF-κB pathway, and fibrosis development was prevented by down-regulation of TGF-β signalling. CONCLUSIONS AND IMPLICATIONS Salsalate exerted a preventive effect on the development of NASH and progression to fibrosis. These data suggest a clinical application of salsalate in preventing NASH.
Collapse
Affiliation(s)
- Wen Liang
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands.,Department of Endocrinology and Metabolic Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Lars Verschuren
- Department of Microbiology and Systems Biology, TNO, Zeist, The Netherlands
| | - Petra Mulder
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - José W A van der Hoorn
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - Joanne Verheij
- Department of Pathology, Academic Medical Center, Amsterdam, The Netherlands
| | - Andrea D van Dam
- Department of Endocrinology and Metabolic Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Mariette R Boon
- Department of Endocrinology and Metabolic Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Hans M G Princen
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - Louis M Havekes
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands.,Department of Endocrinology and Metabolic Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Robert Kleemann
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - Anita M van den Hoek
- Department of Metabolic Health Research, The Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| |
Collapse
|
35
|
Wehmeyer JL, Natesan S, Christy RJ. Development of a Sterile Amniotic Membrane Tissue Graft Using Supercritical Carbon Dioxide. Tissue Eng Part C Methods 2015; 21:649-59. [DOI: 10.1089/ten.tec.2014.0304] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jennifer L. Wehmeyer
- Extremity Trauma Research and Regenerative Medicine, U.S. Army Institute of Surgical Research, JBSA Fort Sam Houston, Texas
| | - Shanmugasundaram Natesan
- Extremity Trauma Research and Regenerative Medicine, U.S. Army Institute of Surgical Research, JBSA Fort Sam Houston, Texas
| | - Robert J. Christy
- Extremity Trauma Research and Regenerative Medicine, U.S. Army Institute of Surgical Research, JBSA Fort Sam Houston, Texas
| |
Collapse
|
36
|
Sakamoto H, Watanabe K, Koto A, Koizumi G, Satomura T, Watanabe S, Suye SI. A bienzyme electrochemical biosensor for the detection of collagen l-hydroxyproline. SENSING AND BIO-SENSING RESEARCH 2015. [DOI: 10.1016/j.sbsr.2015.03.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
|
37
|
Wiegant K, Intema F, Roermund PM, Barten‐van Rijbroek AD, Doornebal A, Hazewinkel HAW, Lafeber FPJG, Mastbergen SC. Evidence of Cartilage Repair by Joint Distraction in a Canine Model of Osteoarthritis. Arthritis Rheumatol 2015; 67:465-74. [DOI: 10.1002/art.38906] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 10/02/2014] [Indexed: 12/24/2022]
Affiliation(s)
- Karen Wiegant
- University Medical Center UtrechtUtrechtThe Netherlands
| | - Femke Intema
- University Medical Center UtrechtUtrechtThe Netherlands
| | | | | | | | | | | | | |
Collapse
|
38
|
Wang L, Regatte RR. T₁ρ MRI of human musculoskeletal system. J Magn Reson Imaging 2014; 41:586-600. [PMID: 24935818 DOI: 10.1002/jmri.24677] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 06/03/2014] [Indexed: 12/21/2022] Open
Abstract
Magnetic resonance imaging (MRI) offers the direct visualization of the human musculoskeletal (MSK) system, especially all diarthrodial tissues including cartilage, bone, menisci, ligaments, tendon, hip, synovium, etc. Conventional MRI techniques based on T1 - and T2 -weighted, proton density (PD) contrast are inconclusive in quantifying early biochemically degenerative changes in MSK system in general and articular cartilage in particular. In recent years, quantitative MR parameter mapping techniques have been used to quantify the biochemical changes in articular cartilage, with a special emphasis on evaluating joint injury, cartilage degeneration, and soft tissue repair. In this article we focus on cartilage biochemical composition, basic principles of T1ρ MRI, implementation of T1ρ pulse sequences, biochemical validation, and summarize the potential applications of the T1ρ MRI technique in MSK diseases including osteoarthritis (OA), anterior cruciate ligament (ACL) injury, and knee joint repair. Finally, we also review the potential advantages, challenges, and future prospects of T1ρ MRI for widespread clinical translation.
Collapse
Affiliation(s)
- Ligong Wang
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, Jiangsu, China
| | | |
Collapse
|
39
|
Luo J, Korossis SA, Wilshaw SP, Jennings LM, Fisher J, Ingham E. Development and characterization of acellular porcine pulmonary valve scaffolds for tissue engineering. Tissue Eng Part A 2014; 20:2963-74. [PMID: 24786313 DOI: 10.1089/ten.tea.2013.0573] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Currently available replacement heart valves all have limitations. This study aimed to produce and characterize an acellular, biocompatible porcine pulmonary root conduit for reconstruction of the right ventricular outflow tract e.g., during Ross procedure. A process for the decellularization of porcine pulmonary roots was developed incorporating trypsin treatment of the adventitial surface of the scraped pulmonary artery and sequential treatment with hypotonic Tris buffer (HTB; 10 mM Tris pH 8.0, 0.1% (w/v) EDTA, and 10 KIU aprotinin), 0.1% (w/v) sodium dodecyl sulfate in HTB, two cycles of DNase and RNase, and sterilization with 0.1% (v/v) peracetic acid. Histology confirmed an absence of cells and retention of the gross histoarchitecture. Immunohistochemistry further confirmed cell removal and partial retention of the extracellular matrix, but a loss of collagen type IV. DNA levels were reduced by more than 96% throughout all regions of the acellular tissue and no functional genes were detected using polymerase chain reaction. Total collagen levels were retained but there was a significant loss of glycosaminoglycans following decellularization. The biomechanical, hydrodynamic, and leaflet kinematics properties were minimally affected by the process. Both immunohistochemical labeling and antibody absorption assay confirmed a lack of α-gal epitopes in the acellular porcine pulmonary roots and in vitro biocompatibility studies indicated that acellular leaflets and pulmonary arteries were not cytotoxic. Overall the acellular porcine pulmonary roots have excellent potential for development of a tissue substitute for right ventricular outflow tract reconstruction e.g., during the Ross procedure.
Collapse
Affiliation(s)
- Ji Luo
- 1 Institute of Medical and Biological Engineering, The University of Leeds , Leeds, United Kingdom
| | | | | | | | | | | |
Collapse
|
40
|
Homeostatic mechanisms in articular cartilage and role of inflammation in osteoarthritis. Curr Rheumatol Rep 2014; 15:375. [PMID: 24072604 DOI: 10.1007/s11926-013-0375-6] [Citation(s) in RCA: 222] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Osteoarthritis (OA) is a whole joint disease, in which thinning and disappearance of cartilage is a critical determinant in OA progression. The rupture of cartilage homeostasis whatever its cause (aging, genetic predisposition, trauma or metabolic disorder) induces profound phenotypic modifications of chondrocytes, which then promote the synthesis of a subset of factors that induce cartilage damage and target other joint tissues. Interestingly, among these factors are numerous components of the inflammatory pathways. Chondrocytes produce cytokines, chemokines, alarmins, prostanoids, and adipokines and express numerous cell surface receptors for cytokines and chemokines, as well as Toll-like receptors. These receptors activate intracellular signaling pathways involved in inflammatory and stress responses of chondrocytes in OA joints. This review focuses on mechanisms responsible for the maintenance of cartilage homeostasis and highlights the role of inflammatory processes in OA progression.
Collapse
|
41
|
Li X, Liu H, Gu S, Liu C, Sun C, Zheng Y, Chen Y. Replacing Shox2 with human SHOX leads to congenital disc degeneration of the temporomandibular joint in mice. Cell Tissue Res 2014; 355:345-54. [PMID: 24248941 PMCID: PMC3945842 DOI: 10.1007/s00441-013-1743-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Accepted: 10/10/2013] [Indexed: 12/11/2022]
Abstract
The temporomandibular joint (TMJ) consists in the glenoid fossa arising from the otic capsule through intramembranous ossification, the fibrocartilaginous disc and the condyle, which is derived from the secondary cartilage by endochondral ossification. We have reported previously that cranial neural-crest-specific inactivation of the homeobox gene Shox2, which is expressed in the mesenchymal cells of the maxilla-mandibular junction and later in the progenitor cells and perichondrium of the developing chondyle, leads to dysplasia and ankylosis of the TMJ and that replacement of the mouse Shox2 with the human SHOX gene rescues the dysplastic and ankylosis phenotypes but results in a prematurely worn out articular disc. In this study, we investigate the molecular and cellular bases for the prematurely worn out articular disc in the TMJ of mice carrying the human SHOX replacement allele in the Shox2 locus (termed Shox2 (SHOX-KI/KI)). We find that the developmental process and expression of several key genes in the TMJ of Shox2 (SHOX-KI/KI) mice are similar to that of controls. However, the disc of the Shox2 (SHOX-KI/KI) TMJ exhibits a reduced level of Collagen I and Aggrecan, accompanied by increased activities of matrix metalloproteinases and a down-regulation of Ihh expression. Dramatically increased cell apoptosis in the disc was also observed. These combinatory cellular and molecular defects appear to contribute to the observed disc phenotype, suggesting that, although human SHOX can exert similar functions to mouse Shox2 in regulating early TMJ development, it apparently has a distinct function in the regulation of those molecules that are involved in tissue homeostasis.
Collapse
Affiliation(s)
- Xihai Li
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA 70118, USA
| | - Hongbing Liu
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA 70118, USA
| | - Shuping Gu
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA 70118, USA
| | - Chao Liu
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA 70118, USA
| | - Cheng Sun
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA 70118, USA
| | - Yuqian Zheng
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA 70118, USA
| | - YiPing Chen
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA 70118, USA
| |
Collapse
|
42
|
Mechanically overloading collagen fibrils uncoils collagen molecules, placing them in a stable, denatured state. Matrix Biol 2014; 33:54-9. [DOI: 10.1016/j.matbio.2013.07.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 07/10/2013] [Accepted: 07/11/2013] [Indexed: 11/24/2022]
|
43
|
Ignat’eva NY, Zakharkina OL, Lunin VV, Sergeeva EA, Mazaishvili KV, Maksimov SV. Effect of venous wall immobilization on the thermal degradation of collagen. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2013. [DOI: 10.1134/s0036024413110101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
44
|
Nguyen H, Cassady AI, Bennett MB, Gineyts E, Wu A, Morgan DAF, Forwood MR. Reducing the radiation sterilization dose improves mechanical and biological quality while retaining sterility assurance levels of bone allografts. Bone 2013; 57:194-200. [PMID: 23912050 DOI: 10.1016/j.bone.2013.07.036] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 07/22/2013] [Accepted: 07/25/2013] [Indexed: 01/10/2023]
Abstract
BACKGROUND Bone allografts carry a risk of infection, so terminal sterilization by gamma irradiation at 25kGy is recommended; but is deleterious to bone quality. Contemporary bone banking significantly reduces initial allograft bioburden, questioning the need to sterilize at 25kGy. METHODS We inoculated allograft bone with Staphylococcus epidermidis and Bacillus pumilus, then exposed them to gamma irradiation at 0, 5, 10, 15, 20 and 25kGy. Mechanical and biological properties of allografts were also assessed. Our aim was to determine an optimal dose that achieves sterility assurance while minimizing deleterious effects on allograft tissue. RESULTS 20-25kGy eliminated both organisms at concentrations from 10(1) to 10(3)CFU, while 10-15kGy sterilized bone samples to a bioburden concentration of 10(2)CFU. Irradiation did not generate pro-inflammatory bone surfaces, as evidenced by macrophage activation, nor did it affect attachment or proliferation of osteoblasts. At doses ≥10kGy, the toughness of cortical bone was reduced (P<0.05), and attachment and fusion of osteoclasts onto irradiated bone declined at 20 and 25kGy (P<0.05). There was no change in collagen cross-links, but a significant dose-response increase in denatured collagen (P<0.05). CONCLUSIONS Our mechanical and cell biological data converge on 15kGy as a threshold for radiation sterilization of bone allografts. Between 5 and 15kGy, bone banks can undertake validation that provides allografts with an acceptable sterility assurance level, improving their strength and biocompatibility significantly. CLINICAL RELEVANCE The application of radiation sterilization doses between 5 and 15kGy will improve bone allograft mechanical performance and promote integration, while retaining sterility assurance levels. Improved quality of allograft bone will promote superior clinical outcomes.
Collapse
Affiliation(s)
- Huynh Nguyen
- Griffith Health Institute and School of Medical Science, Griffith University, Gold Coast, QLD 4222, Australia; Queensland Bone Bank, Organ and Tissue Donation Service, Queensland Health, Brisbane, QLD, Australia
| | | | | | | | | | | | | |
Collapse
|
45
|
Oungoulian SR, Chang S, Bortz O, Hehir KE, Zhu K, Willis CE, Hung CT, Ateshian GA. Articular cartilage wear characterization with a particle sizing and counting analyzer. J Biomech Eng 2013; 135:024501. [PMID: 23445072 DOI: 10.1115/1.4023456] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Quantitative measurements of cartilage wear have been challenging, with no method having yet emerged as a standard. This study tested the hypothesis that latest-generation particle analyzers are capable of detecting cartilage wear debris generated during in vitro loading experiments that last 24 h or less, by producing measurable content significantly above background noise levels otherwise undetectable through standard biochemical assays. Immature bovine cartilage disks (4 mm diameter, 1.3 mm thick) were tested against glass using reciprocal sliding under unconfined compression creep for 24 h. Control groups were used to assess various sources of contamination. Results demonstrated that cartilage samples subjected to frictional loading produced particulate volume significantly higher than background noise and contamination levels at all tested time points (1, 2, 6, and 24 h, p < 0.042). The particle counter was able to detect very small levels of wear (less than 0.02% of the tissue sample by volume), whereas no significant differences were observed in biochemical assays for collagen or glycosaminoglycans among any of the groups or time points. These findings confirm that latest-generation particle analyzers are capable of detecting very low wear levels in cartilage experiments conducted over a period no greater than 24 h.
Collapse
Affiliation(s)
- Sevan R Oungoulian
- Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA.
| | | | | | | | | | | | | | | |
Collapse
|
46
|
Xia W, Hammerberg C, Li Y, He T, Quan T, Voorhees JJ, Fisher GJ. Expression of catalytically active matrix metalloproteinase-1 in dermal fibroblasts induces collagen fragmentation and functional alterations that resemble aged human skin. Aging Cell 2013; 12:661-71. [PMID: 23601157 DOI: 10.1111/acel.12089] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2013] [Indexed: 11/27/2022] Open
Abstract
Increased expression of matrix metalloproteinase-1 (MMP-1) and reduced production of type I collagen by dermal fibroblasts are prominent features of aged human skin. We have proposed that MMP-1-mediated collagen fibril fragmentation is a key driver of age-related decline of skin function. To investigate this hypothesis, we constructed, characterized, and expressed constitutively active MMP-1 mutant (MMP-1 V94G) in adult human skin in organ culture and fibroblasts in three-dimensional collagen lattice cultures. Expression of MMP-1 V94G in young skin in organ culture caused fragmentation and ultrastructural alterations of collagen fibrils similar to those observed in aged human skin in vivo. Expression of MMP-1 V94G in dermal fibroblasts cultured in three-dimensional collagen lattices caused substantial collagen fragmentation, which was markedly reduced by MMP-1 siRNA-mediated knockdown or MMP inhibitor MMI270. Importantly, fibroblasts cultured in MMP-1 V94G-fragmented collagen lattices displayed many alterations observed in fibroblasts in aged human skin, including reduced cytoplasmic area, disassembled actin cytoskeleton, impaired TGF-β pathway, and reduced collagen production. These results support the concept that MMP-1-mediated fragmentation of dermal collagen fibrils alters the morphology and function of dermal fibroblasts and provide a foundation for understanding specific mechanisms that link collagen fibril fragmentation to age-related decline of fibroblast function.
Collapse
Affiliation(s)
- Wei Xia
- Department of Dermatology University of Michigan 1301 E Catherine, R6447 Med Sci I, Ann Arbor MI 48109‐5609 USA
| | - Craig Hammerberg
- Department of Dermatology University of Michigan 1301 E Catherine, R6447 Med Sci I, Ann Arbor MI 48109‐5609 USA
| | - Yong Li
- Department of Dermatology University of Michigan 1301 E Catherine, R6447 Med Sci I, Ann Arbor MI 48109‐5609 USA
| | - Tianyuan He
- Department of Dermatology University of Michigan 1301 E Catherine, R6447 Med Sci I, Ann Arbor MI 48109‐5609 USA
| | - Taihao Quan
- Department of Dermatology University of Michigan 1301 E Catherine, R6447 Med Sci I, Ann Arbor MI 48109‐5609 USA
| | - John J. Voorhees
- Department of Dermatology University of Michigan 1301 E Catherine, R6447 Med Sci I, Ann Arbor MI 48109‐5609 USA
| | - Gary J. Fisher
- Department of Dermatology University of Michigan 1301 E Catherine, R6447 Med Sci I, Ann Arbor MI 48109‐5609 USA
| |
Collapse
|
47
|
Huang Q, Ingham E, Rooney P, Kearney JN. Production of a sterilised decellularised tendon allograft for clinical use. Cell Tissue Bank 2013; 14:645-54. [PMID: 23443409 DOI: 10.1007/s10561-013-9366-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 02/14/2013] [Indexed: 01/05/2023]
Abstract
Application of a high-level decontamination or sterilisation procedure and cell removal technique to tendon allograft can reduce the concerns of disease transmission, immune reaction, and may improve remodelling of the graft after implantation. The decellularised matrix can also be used as a matrix for tendon tissue engineering. One such sterilisation factor, Peracetic acid (PAA) has the advantage of not producing harmful reaction residues. The aim of this study was to evaluate the effects of PAA treatment and a cell removal procedure on the production of tendon matrix. Human patellar tendons, thawed from frozen were treated respectively as: Group 1, control with no treatment; Group 2, sterilised with PAA (0.1 % (w/v) PAA for 3 h) Group 3, decellularised (incubation successively in hypotonic buffer, 0.1 % (w/v) sodium dodecyl sulphate, and a nuclease solution); Group 4, decellularised and PAA sterilised. Histological analysis showed that no cells were visible after the decellularisation treatment. The integrity of tendon structure was maintained after decellularisation and PAA sterilisation, however, the collagen waveform was slightly loosened. No contact cytotoxicity was found in any of the groups. Determination of de-natured collagen showed no significant increase when compared with the control. This suggested that the decellularisation and sterilisation processing procedures did not compromise the major properties of the tendon. The sterilised, decellularised tendon could be suitable for clinical use.
Collapse
Affiliation(s)
- Q Huang
- Tissue Development Laboratory, NHS Blood and Transplant, Estuary Banks, Speke, Liverpool, L24 8RB, UK
| | | | | | | |
Collapse
|
48
|
Schadow S, Siebert HC, Lochnit G, Kordelle J, Rickert M, Steinmeyer J. Collagen metabolism of human osteoarthritic articular cartilage as modulated by bovine collagen hydrolysates. PLoS One 2013; 8:e53955. [PMID: 23342047 PMCID: PMC3546930 DOI: 10.1371/journal.pone.0053955] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 12/04/2012] [Indexed: 02/07/2023] Open
Abstract
Destruction of articular cartilage is a characteristic feature of osteoarthritis (OA). Collagen hydrolysates are mixtures of collagen peptides and have gained huge public attention as nutriceuticals used for prophylaxis of OA. Here, we evaluated for the first time whether different bovine collagen hydrolysate preparations indeed modulate the metabolism of collagen and proteoglycans from human OA cartilage explants and determined the chemical composition of oligopeptides representing collagen fragments. Using biophysical techniques, like MALDI-TOF-MS, AFM, and NMR, the molecular weight distribution and aggregation behavior of collagen hydrolysates from bovine origin (CH-Alpha®, Peptan™ B 5000, Peptan™ B 2000) were determined. To investigate the metabolism of human femoral OA cartilage, explants were obtained during knee replacement surgery. Collagen synthesis of explants as modulated by 0–10 mg/ml collagen hydrolysates was determined using a novel dual radiolabeling procedure. Proteoglycans, NO, PGE2, MMP-1, -3, -13, TIMP-1, collagen type II, and cell viability were determined in explant cultures. Groups of data were analyzed using ANOVA and the Friedman test (n = 5–12). The significance was set to p≤0.05. We found that collagen hydrolysates obtained from different sources varied with respect to the width of molecular weight distribution, average molecular weight, and aggregation behavior. None of the collagen hydrolysates tested stimulated the biosynthesis of collagen. Peptan™ B 5000 elevated NO and PGE2 levels significantly but had no effect on collagen or proteoglycan loss. All collagen hydrolysates tested proved not to be cytotoxic. Together, our data demonstrate for the first time that various collagen hydrolysates differ with respect to their chemical composition of collagen fragments as well as by their pharmacological efficacy on human chondrocytes. Our study underscores the importance that each collagen hydrolysate preparation should first demonstrate its pharmacological potential both in vitro and in vivo before being used for both regenerative medicine and prophylaxis of OA.
Collapse
Affiliation(s)
- Saskia Schadow
- Department of Orthopedics, University Hospital Giessen and Marburg, Giessen, Germany
| | | | - Günter Lochnit
- Department of Biochemistry, Justus-Liebig-University Giessen, Giessen, Germany
| | - Jens Kordelle
- Agaplesion Evangelical Hospital Mittelhessen, Giessen, Germany
| | - Markus Rickert
- Department of Orthopedics, University Hospital Giessen and Marburg, Giessen, Germany
| | - Jürgen Steinmeyer
- Department of Orthopedics, University Hospital Giessen and Marburg, Giessen, Germany
- * E-mail:
| |
Collapse
|
49
|
Cartilage collagen damage in hip osteoarthritis similar to that seen in knee osteoarthritis; a case-control study of relationship between collagen, glycosaminoglycan and cartilage swelling. BMC Musculoskelet Disord 2013; 14:18. [PMID: 23302451 PMCID: PMC3546305 DOI: 10.1186/1471-2474-14-18] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 01/05/2013] [Indexed: 11/10/2022] Open
Abstract
Background It remains to be shown whether OA shares molecular similarities between different joints in humans. This study provides evidence for similarities in cartilage molecular damage in osteoarthritic (OA) joints. Methods Articular cartilage from osteoarthritic hip joints were analysed and compared to non-OA controls regarding collagen, glycosaminoglycan and water content. Femoral heads from 16 osteoarthritic (OA) and 20 reference patients were obtained from hip replacement surgery due to OA and femoral neck fracture, respectively. Cartilage histological changes were assessed by Mankin grading and denatured collagen type II immunostaining and cartilage was extracted by α-chymotrypsin. Hydroxyproline and Alcian blue binding assays were used to measure collagen and glycosaminoglycan (GAG) content, respectively. Results Mankin and immunohistology scores were significantly higher in hip OA samples than in reference samples. Cartilage water content was 6% higher in OA samples than in references. 2.5 times more collagen was extracted from OA than from reference samples. There was a positive association between water content and percentage of extractable collagen pool (ECP) in both groups. The amounts of collagen per wet and dry weights did not differ statistically between OA and reference cartilage. % Extractable collagen was not related to collagen per dry weight in either group. However when collagen was expressed by wet weight there was a negative correlation between % extractable and collagen in OA cartilage. The amount of GAG per wet weight was similar in both groups but the amount of GAG per dry weight was higher in OA samples compared to reference samples, which suggests a capacity for GAG biosynthesis in hip OA cartilage. Neither of the studied parameters was related to age in either group. Conclusions Increased collagen extractability and water content in human hip cartilage is associated with OA pathology and can be observed at early stages of the degenerative hip OA process. Our results suggest a common degradative pathway of collagen in articular cartilage of different joints. Furthermore, the study suggests that biochemical changes precede more overt OA changes and that chondrocytes may have a capability to compensate molecular loss in the early phase of OA.
Collapse
|
50
|
Vos PAJM, DeGroot J, Barten-van Rijbroek AD, Zuurmond AM, Bijlsma JWJ, Mastbergen SC, Lafeber FPJG. Elevation of cartilage AGEs does not accelerate initiation of canine experimental osteoarthritis upon mild surgical damage. J Orthop Res 2012; 30:1398-404. [PMID: 22388985 DOI: 10.1002/jor.22092] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Accepted: 02/02/2012] [Indexed: 02/04/2023]
Abstract
Osteoarthritis is a highly prevalent disease, age being the main risk factor. The age-related accumulation of advanced-glycation-endproducts (AGEs) adversely affects the mechanical and biochemical properties of cartilage. The hypothesis that accumulation of cartilage AGEs in combination with surgically induced damage predisposes to the development of osteoarthritis was tested in vivo in a canine model. To artificially increase cartilage AGEs, right knee joints of eight dogs were repeatedly injected with ribose/threose (AGEd-joints). Left joints with vehicle alone served as control. Subsequently, minimal surgically applied cartilage damage was induced and loading restrained as much as possible. Thirty weeks after surgery, joint tissues of all dogs were analyzed for biochemical and histological features of OA. Cartilage pentosidine levels were ∼5-fold enhanced (p = 0.001 vs. control-joints). On average, no statistically significant differences in joint degeneration were found between AGEd and control-joints. Enhanced cartilage pentosidine levels did correlate with less cartilage proteoglycan release (R = -0.762 and R = -0.810 for total and newly-formed proteoglycans, respectively; p = 0.028 and 0.015 for both). The current data support the diminished cartilage turnover, but only a tendency towards enhanced cartilage damage in AGEd articular cartilage was observed. As such, elevated AGEs do not unambiguously accelerate the development of early canine OA upon minimal surgical damage.
Collapse
Affiliation(s)
- Petra A J M Vos
- Rheumatology and Clinical Immunology (F02.127), University Medical Centre Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | | | | | | | | | | | | |
Collapse
|