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Salim NV, Madhan B, Glattauer V, Ramshaw JAM. Comprehensive review on collagen extraction from food by-products and waste as a value-added material. Int J Biol Macromol 2024; 278:134374. [PMID: 39098671 DOI: 10.1016/j.ijbiomac.2024.134374] [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: 02/24/2024] [Revised: 07/18/2024] [Accepted: 07/30/2024] [Indexed: 08/06/2024]
Abstract
The consumption of animal products has witnessed a significant increase over the years, leading to a growing need for industries to adopt strict waste control measures to mitigate environmental impacts. The disposal of animal waste in landfill can result in diverse and potentially hazardous decomposition by-products. Animal by-products, derived from meat, poultry, seafood and fish industries, offer a substantial raw material source for collagen and gelatin production due to their high protein content. Collagen, being a major protein component of animal tissues, represents an abundant resource that finds application in various chemical and material industries. The demand for collagen-based products continues to grow, yet the availability of primary material remains limited and insufficient to meet projected needs. Consequently, repurposing waste materials that contain collagen provides an opportunity to meet this need while at the same time minimizing the amount of waste that is dumped. This review examines the potential to extract value from the collagen content present in animal-derived waste and by-products. It provides a systematic evaluation of different species groups and discusses various approaches for processing and fabricating repurposed collagen. This review specifically focuses on collagen-based research, encompassing an examination of its physical and chemical properties, as well as the potential for chemical modifications. We have detailed how the research and knowledge built on collagen structure and function will drive the new initiatives that will lead to the development of new products and opportunities in the future. Additionally, it highlights emerging approaches for extracting high-quality protein from waste and discusses efforts to fabricate collagen-based materials leading to the development of new and original products within the chemical, biomedical and physical science-based industries.
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Affiliation(s)
- Nisa V Salim
- School of Engineering, Swinburne University of Technology, Hawthorne, Victoria 3122, Australia.
| | - Balaraman Madhan
- Centre for Academic and Research Excellence, CSIR-Central Leather Research Institute, Sardar Patel Road, Adyar, Chennai 600 020, India
| | | | - John A M Ramshaw
- School of Engineering, Swinburne University of Technology, Hawthorne, Victoria 3122, Australia
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Mao L, Han Z, Xing X, Hu Z, She L, Song C. Development of implantable electrode based on bioresorbable Mg alloy for tissue welding application. Sci Rep 2024; 14:16110. [PMID: 38997318 PMCID: PMC11245471 DOI: 10.1038/s41598-024-67077-8] [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: 02/25/2024] [Accepted: 07/08/2024] [Indexed: 07/14/2024] Open
Abstract
An implantable electrode based on bioresorbable Mg-Nd-Zn-Zr alloy was developed for next-generation radiofrequency (RF) tissue welding application, aiming to reduce thermal damage and enhance anastomotic strength. The Mg alloy electrode was designed with different structural features of cylindrical surface (CS) and continuous long ring (LR) in the welding area, and the electrothermal simulations were studied by finite element analysis (FEA). Meanwhile, the temperature variation during tissue welding was monitored and the anastomotic strength of welded tissue was assessed by measuring the avulsion force and burst pressure. FEA results showed that the mean temperature in the welding area and the proportion of necrotic tissue were significantly reduced when applying an alternating current of 110 V for 10 s to the LR electrode. In the experiment of tissue welding ex vivo, the maximum and mean temperatures of tissues welded by the LR electrode were also significantly reduced and the anastomotic strength of welded tissue could be obviously improved. Overall, an ideal welding temperature and anastomotic strength which meet the clinical requirement can be obtained after applying the LR electrode, suggesting that Mg-Nd-Zn-Zr alloy with optimal structure design shows great potential to develop implantable electrode for next-generation RF tissue welding application.
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Affiliation(s)
- Lin Mao
- Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
| | - Zhengyi Han
- Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Xupo Xing
- Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Zhongxin Hu
- Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Langlang She
- Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Chengli Song
- Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
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Yan L, Zhang Y, Zhang Y, Chen Q, Zhang L, Han X, Yang Y, Zhang C, Liu Y, Yu R. Preparation and characterization of a novel humanized collagen III with repeated fragments of Gly300-Asp329. Protein Expr Purif 2024; 219:106473. [PMID: 38508543 DOI: 10.1016/j.pep.2024.106473] [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: 02/02/2024] [Revised: 03/12/2024] [Accepted: 03/16/2024] [Indexed: 03/22/2024]
Abstract
Recombinant human collagens have attracted intensive interest in the past two decades, demonstrating considerable potential in medicine, tissue engineering, and cosmetics. Several humanized recombinant collagens have been produced, exhibiting similar characteristics as the native species. To get insight into the structural and bioactive properties of different parts of collagen, in this study, the segment of Gly300-Asp329 of type III collagen was first adopted and repeated 18 times to prepare a novel recombinant collagen (named rhCLA). RhCLA was successfully expressed in E. coli, and a convenient separation procedure was established through reasonably combining alkaline precipitation and acid precipitation, yielding crude rhCLA with a purity exceeding 90%. Additionally, a polishing purification step utilizing cation exchange chromatography was developed, achieving rhCLA purity surpassing 98% and an overall recovery of approximately 120 mg/L culture. Simultaneously, the contents of endotoxin, nucleic acids, and host proteins were reduced to extremely low levels. This fragmented type III collagen displayed a triple-helical structure and gel-forming capability at low temperatures. Distinct fibrous morphology was also observed through TEM analysis. In cell experiments, rhCLA exhibited excellent biocompatibility and cell adhesion properties. These results provide valuable insights for functional studies of type III collagen and a reference approach for the large-scale production of recombinant collagens.
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Affiliation(s)
- Lingying Yan
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yao Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yuxiang Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Qiexin Chen
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Luyao Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiao Han
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yumo Yang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Chun Zhang
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China.
| | - Yongdong Liu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Rong Yu
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
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Sundar VJ. Novel biocompatible denture material incorporating type I collagen with improved functional properties for oral health. Odontology 2024; 112:472-478. [PMID: 37914822 DOI: 10.1007/s10266-023-00866-1] [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: 08/04/2023] [Accepted: 10/08/2023] [Indexed: 11/03/2023]
Abstract
The use of collagen is the recent development in various medical fields. Huge quantities of hide and skin trimmings are generated during the leather processing are wasted or underutilized. Trimmings contain collagen which can be beneficially extracted and utilized for high value products. Poly methyl methacrylate based denture materials exhibit serious concerns such as high porosity, presence of residual monomer, shrinkage, distortion and high rate of deterioration of the materials. This study aims to incorporate extracted Type I collagen with polymer to obtain denture base and investigate its chemical and mechanical properties. The present research methodology also reduces the quantity of monomer and acrylic resin usage. The collagen was extracted from animal skin and hide trimmings which are otherwise disposed as wastes. This study investigated the effect of visco-elastic characteristics of resulted specimens and their transition temperature, mechanical properties, decomposition temperature and leachability. The collagen-based specimens have better tensile strength with high decomposition temperature compared to control specimens. Scanning Electron Microscopy analysis revealed that the experimental specimens was cohesive and homogeneous which explained the higher tensile and decomposition values. The study suggests that collagen cross-linked acrylic denture base exhibit better mechanical and thermal resistance properties when compared to control specimens. The study indicates that biomaterials are emerging as smart products of value in human health.
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Staab-Weijnitz CA, Onursal C, Nambiar D, Vanacore R. Assessment of Collagen in Translational Models of Lung Research. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1413:213-244. [PMID: 37195533 DOI: 10.1007/978-3-031-26625-6_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The extracellular matrix (ECM) plays an important role in lung health and disease. Collagen is the main component of the lung ECM, widely used for the establishment of in vitro and organotypic models of lung disease, and as scaffold material of general interest for the field of lung bioengineering. Collagen also is the main readout for fibrotic lung disease, where collagen composition and molecular properties are drastically changed and ultimately result in dysfunctional "scarred" tissue. Because of the central role of collagen in lung disease, quantification, determination of molecular properties, and three-dimensional visualization of collagen is important for both development and characterization of translational models of lung research. In this chapter, we provide a comprehensive overview on the various methodologies currently available for quantification and characterization of collagen including their detection principles, advantages, and disadvantages.
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Affiliation(s)
- Claudia A Staab-Weijnitz
- Institute of Lung Health and Immunity and Comprehensive Pneumology Center with the CPC-M BioArchive, Member of the German Center for Lung Research (DZL), Ludwig-Maximilians-Universität and Helmholtz Zentrum München, Munich, Germany.
| | - Ceylan Onursal
- Institute of Lung Health and Immunity and Comprehensive Pneumology Center with the CPC-M BioArchive, Member of the German Center for Lung Research (DZL), Ludwig-Maximilians-Universität and Helmholtz Zentrum München, Munich, Germany
| | - Deepika Nambiar
- Center for Matrix Biology, Department of Medicine, Division of Nephrology and Hypertension, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Roberto Vanacore
- Center for Matrix Biology, Department of Medicine, Division of Nephrology and Hypertension, Vanderbilt University Medical Center, Nashville, TN, USA.
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Morphological and Quantitative Evidence for Altered Mesenchymal Stem Cell Remodeling of Collagen in an Oxidative Environment—Peculiar Effect of Epigallocatechin-3-Gallate. Polymers (Basel) 2022; 14:polym14193957. [PMID: 36235908 PMCID: PMC9571090 DOI: 10.3390/polym14193957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/09/2022] [Accepted: 09/17/2022] [Indexed: 11/16/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are involved in the process of extracellular matrix (ECM) remodeling where collagens play a pivotal role. We recently demonstrated that the remodeling of adsorbed collagen type I might be disordered upon oxidation following its fate in the presence of human adipose-derived MSC (ADMSCs). With the present study we intended to learn more about the effect of polyphenolic antioxidant Epigallocatechin-3-gallate (EGCG), attempting to mimic the conditions of oxidative stress in vivo and its putative prevention by antioxidants. Collagen Type I was isolated from mouse tail tendon (MTC) and labelled with FITC before being oxidized according to Fe2+/H2O2 protocol. FITC-collagen remodeling by ADMSC was assessed morphologically before and after EGCG pretreatment and confirmed via detailed morphometric analysis measuring the anisotropy index (AI) and fluorescence intensity (FI) in selected regions of interest (ROI), namely: outside the cells, over the cells, and central (nuclear/perinuclear) region, whereas the pericellular proteolytic activity was measured by de-quenching fluorescent collagen probes (FRET effect). Here we provide morphological evidence that MTC undergoes significant reorganization by the adhering ADMSC and is accompanied by a substantial activation of pericellular proteolysis, and further confirm that both processes are suppressed upon collagen oxidation. An important observation was that this abrogated remodeling cannot be prevented by the EGCG pretreatment. Conversely, the detailed morphometric analysis showed that oxidized FITC-collagen tends to accumulate beneath cells and around cell nuclei, suggesting the activation of alternative routes for its removal, such as internalization and/or transcytosis. Morphometric analysis also revealed that both processes are supported by EGCG pretreatment.
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Nakamura S, Hoshi H, Wakabayashi K, Seki M, Watanabe M, Watanabe M, Inaba H, Ushijima N, Akasaka T. Extracted tissue‐specific atelocollagens have distinctive textural properties. J Texture Stud 2022; 53:654-661. [DOI: 10.1111/jtxs.12715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 07/19/2022] [Accepted: 08/18/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Sayaka Nakamura
- Department of Biotechnology Maebashi Institute of Technology
| | - Hiroko Hoshi
- Department of Biotechnology Maebashi Institute of Technology
- Graduate School of Biotechnology, Maebashi Institute of Technology, Kamisadori‐machi 460‐1 Maebashi‐shi Gumma Japan
| | | | - Manami Seki
- Department of Biotechnology Maebashi Institute of Technology
| | - Makoto Watanabe
- Department of Biotechnology Maebashi Institute of Technology
| | - Momoka Watanabe
- Department of Biotechnology Maebashi Institute of Technology
| | - Hiroki Inaba
- Department of Biotechnology Maebashi Institute of Technology
- Graduate School of Biotechnology, Maebashi Institute of Technology, Kamisadori‐machi 460‐1 Maebashi‐shi Gumma Japan
| | - Natsumi Ushijima
- Support Section for Education and Research, Faculty of Dental Medicine Hokkaido University, N13 W7, Kita‐ku Sapporo Japan
| | - Tsukasa Akasaka
- Department of Biomaterials and Bioengineering, Faculty of Dental Medicine Hokkaido University, N13 W7, Kita‐ku Sapporo Japan
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García-Hernández AB, Morales-Sánchez E, Berdeja-Martínez BM, Escamilla-García M, Salgado-Cruz MP, Rentería-Ortega M, Farrera-Rebollo RR, Vega-Cuellar MA, Calderón-Domínguez G. PVA-Based Electrospun Biomembranes with Hydrolyzed Collagen and Ethanolic Extract of Hypericum perforatum for Potential Use as Wound Dressing: Fabrication and Characterization. Polymers (Basel) 2022; 14:1981. [PMID: 35631864 PMCID: PMC9147280 DOI: 10.3390/polym14101981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/25/2022] [Accepted: 05/06/2022] [Indexed: 12/11/2022] Open
Abstract
Biological, physicochemical, structural, and thermal properties of PVA-based electrospun wound dressings added with hydrolyzed collagen (HC) and different concentrations of Hypericum perforatum ethanolic extract (EEHP) were studied. Membrane characterization was carried out by X-ray diffraction, Fourier infrared spectroscopy, differential scanning calorimetry, barrier properties, scanning electron microscopy, image analysis (diameter and pore size), as well as antimicrobial and anti-inflammatory activities. Results showed that the PVA/HC/EEHP materials, fabricated under controlled conditions of temperature and humidity, generated fiber membranes with diameters between 140−390 nm, adequate porosity and pore size for cell growth (67−90% and 4−16 µm, respectively), and good barrier properties (0.005−0.032 g·m−2 s−1) to be used in the treatment of conditions on the skin, and was even better than some commercial products. Finally, they showed to have anti-inflammatory (>80%), and antimicrobial activity against S. aureus and S. epiderm. Furthermore, higher crystalline structure was observed according to the EEHP concentration. In addition, this is the first report in which PVA/HC/EEHP membranes are successfully fabricated and characterized.
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Affiliation(s)
- Alitzel Belém García-Hernández
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, CDMX, Mexico City 07738, Mexico; (A.B.G.-H.); (B.M.B.-M.); (M.P.S.-C.); (R.R.F.-R.); (M.A.V.-C.)
| | - Eduardo Morales-Sánchez
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Unidad Querétaro, Instituto Politécnico Nacional, Qro., Santiago de Querétaro 76090, Mexico;
| | - Blanca M. Berdeja-Martínez
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, CDMX, Mexico City 07738, Mexico; (A.B.G.-H.); (B.M.B.-M.); (M.P.S.-C.); (R.R.F.-R.); (M.A.V.-C.)
| | - Monserrat Escamilla-García
- Departamento de Investigación en Alimentos y Estudios de Postgrado, Universidad Autónoma de Querétaro, Qro., Santiago de Querétaro 76010, Mexico;
| | - Ma. Paz Salgado-Cruz
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, CDMX, Mexico City 07738, Mexico; (A.B.G.-H.); (B.M.B.-M.); (M.P.S.-C.); (R.R.F.-R.); (M.A.V.-C.)
| | - Minerva Rentería-Ortega
- Tecnológico Nacional de México/TES de San Felipe del Progreso, Edo. Méx., San Felipe del Progreso 50640, Mexico;
| | - Reynold R. Farrera-Rebollo
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, CDMX, Mexico City 07738, Mexico; (A.B.G.-H.); (B.M.B.-M.); (M.P.S.-C.); (R.R.F.-R.); (M.A.V.-C.)
| | - Miguel A. Vega-Cuellar
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, CDMX, Mexico City 07738, Mexico; (A.B.G.-H.); (B.M.B.-M.); (M.P.S.-C.); (R.R.F.-R.); (M.A.V.-C.)
| | - Georgina Calderón-Domínguez
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, CDMX, Mexico City 07738, Mexico; (A.B.G.-H.); (B.M.B.-M.); (M.P.S.-C.); (R.R.F.-R.); (M.A.V.-C.)
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Maher MK, White JF, Glattauer V, Yue Z, Hughes TC, Ramshaw JAM, Wallace GG. Variation in Hydrogel Formation and Network Structure for Telo-, Atelo- and Methacrylated Collagens. Polymers (Basel) 2022; 14:polym14091775. [PMID: 35566947 PMCID: PMC9103955 DOI: 10.3390/polym14091775] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/20/2022] [Accepted: 04/23/2022] [Indexed: 01/27/2023] Open
Abstract
As the most abundant protein in the extracellular matrix, collagen has become widely studied in the fields of tissue engineering and regenerative medicine. Of the various collagen types, collagen type I is the most commonly utilised in laboratory studies. In tissues, collagen type I forms into fibrils that provide an extended fibrillar network. In tissue engineering and regenerative medicine, little emphasis has been placed on the nature of the network that is formed. Various factors could affect the network structure, including the method used to extract collagen from native tissue, since this may remove the telopeptides, and the nature and extent of any chemical modifications and crosslinking moieties. The structure of any fibril network affects cellular proliferation and differentiation, as well as the overall modulus of hydrogels. In this study, the network-forming properties of two distinct forms of collagen (telo- and atelo-collagen) and their methacrylated derivatives were compared. The presence of the telopeptides facilitated fibril formation in the unmodified samples, but this benefit was substantially reduced by subsequent methacrylation, leading to a loss in the native self-assembly potential. Furthermore, the impact of the methacrylation of the collagen, which enables rapid crosslinking and makes it suitable for use in 3D printing, was investigated. The crosslinking of the methacrylated samples (both telo- and atelo-) was seen to improve the fibril-like network compared to the non-crosslinked samples. This contrasted with the samples of methacrylated gelatin, which showed little, if any, fibrillar or ordered network structure, regardless of whether they were crosslinked.
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Affiliation(s)
- Malachy Kevin Maher
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, AIIM Facility, Innovation Campus, University of Wollongong, Wollongong, NSW 2519, Australia; (M.K.M.); (Z.Y.)
- CSIRO Manufacturing, Clayton, Melbourne, VIC 3168, Australia; (J.F.W.); (V.G.); (T.C.H.)
| | - Jacinta F. White
- CSIRO Manufacturing, Clayton, Melbourne, VIC 3168, Australia; (J.F.W.); (V.G.); (T.C.H.)
| | - Veronica Glattauer
- CSIRO Manufacturing, Clayton, Melbourne, VIC 3168, Australia; (J.F.W.); (V.G.); (T.C.H.)
| | - Zhilian Yue
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, AIIM Facility, Innovation Campus, University of Wollongong, Wollongong, NSW 2519, Australia; (M.K.M.); (Z.Y.)
| | - Timothy C. Hughes
- CSIRO Manufacturing, Clayton, Melbourne, VIC 3168, Australia; (J.F.W.); (V.G.); (T.C.H.)
| | - John A. M. Ramshaw
- Department of Surgery, St. Vincent’s Hospital, University of Melbourne, Melbourne, VIC 3065, Australia;
| | - Gordon G. Wallace
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, AIIM Facility, Innovation Campus, University of Wollongong, Wollongong, NSW 2519, Australia; (M.K.M.); (Z.Y.)
- Correspondence: ; Tel.: +61-(0)-2-4221-3127
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Curcumin inhibition of bleomycin-induced changes in lung collagen synthesis, deposition and assembly. Mol Biol Rep 2021; 48:7775-7785. [PMID: 34643929 DOI: 10.1007/s11033-021-06790-3] [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: 07/20/2021] [Accepted: 09/15/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Idiopathic pulmonary fibrosis is characterized by progressive lung tissue remodeling and disproportionate deposition of collagenous proteins with limited therapeutic interventions. The purpose of this study was to determine whether curcumin inhibits bleomycin (BLM)-induced increases in synthesis, degradation and cross-linking of lung collagen in rats. METHODS AND RESULTS Following a single intratracheal instillation of BLM to rats (0.75 U/100 g, sacrificed 3, 5, 7, 14 and 28 days post-BLM), lung collagen synthesis (determined by incorporation of 3H-proline) and deposition (determined by lung hydroxyproline content) progressively increased at days 7, 14 and 28 post-BLM injection. Lung lavage fluid hydroxyproline and collagenase levels (a measure of collagen turnover) were increased in BLM rats compared with control groups. In addition, BLM instillation resulted in increased concentrations of collagenase and collagenolytic cathepsin in the lungs. Furthermore, increased cross-linking (as determined by aldehyde content of acid soluble collagen), and decreased susceptibility of fibrotic lung insoluble collagen to denaturing agents occurred in BLM-injured lungs. Significant increases in alveolar macrophage (AM) release of transforming growth factor-β1 (TGF-β1) were noted at various time points (days 3, 5, 7, 14 and 28 post-BLM) during the development and progression of lung fibrosis in rats. Curcumin treatment to BLM rats (300 mg/kg 10 days before and daily thereafter throughout the experimental time period) was associated with marked reductions in lung collagen synthesis and deposition, BALF and lung collagenase activity, BALF hydroxyproline content and lung collagenolytic levels. Additionally, reduced levels of collagen cross-linking and enhanced susceptibility of insoluble lung collagen to denaturing agents were observed in curcumin-treated BLM rats. Finally, curcumin inhibited BLM-induced increases in AM production of TGF-β1. CONCLUSIONS Our data demonstrate for the first time that curcumin prevents fibrotic deposits by modulating collagen turnover, assembly and deposition in BLM-instilled rat lungs, and that curcumin treatment protects against BLM activation of macrophages by suppressing the release of TGF-β1.
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Glucagon-Like Peptide-2 Analogue ZP1849 Augments Colonic Anastomotic Wound Healing. Gastroenterol Res Pract 2020; 2020:8460508. [PMID: 33133182 PMCID: PMC7568816 DOI: 10.1155/2020/8460508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 09/15/2020] [Indexed: 12/14/2022] Open
Abstract
Background The enteroendocrine hormone glucagon-like peptide- (GLP-) 2 is a potent trophic factor in the gastrointestinal tract. The GLP-2 receptor (GLP-2R) is expressed in the stroma of the large bowel wall, which is the major therapeutic target area to prevent anastomotic leakage. We investigated the efficacy of the long-acting GLP-2 analogue ZP1849 on colonic anastomotic wound healing. Methods Eighty-seven male Wistar rats were stratified into four groups and received daily treatment with vehicle or ZP1849 starting one day before (day -1) end-to-end anastomosis was constructed in the left colon on day 0, and on days 0 (resected colon segment), 3, and 5, gene expressions of GLP-2R, Ki67, insulin-like growth factor- (IGF-) 1, type I (COL1A1) and type III (COL3A1) procollagens, cyclooxygenase- (COX-) 1, COX-2, and matrix metalloproteinase- (MMP-) 7 were quantified by RT-qPCR. Breaking strength, myeloperoxidase (MPO), transforming growth factor- (TGF-) β1, and soluble collagen proteins were measured on days 3 and 5. Results ZP1849 treatment increased Ki67 (P < 0.0001) and IGF-1 (P < 0.05) mRNA levels in noninjured colon day 0, and postoperatively in the anastomotic wounds compared to vehicle-treated rats. ZP1849-treated rats had increased (P = 0.042) anastomotic breaking strength at day 5 compared with vehicle. COL1A1 and COL3A1 mRNA levels (P < 0.0001) and soluble collagen proteins (P < 0.05) increased from day 3 to day 5 in ZP1849-treated rats, but not in vehicle-treated rats. COX-2 mRNA and MPO protein levels decreased from day 3 to day 5 (P < 0.001) in both groups. ZP1849 treatment reduced TGF-β1 protein levels on day 5 (P < 0.001) but did not impact MMP-7 transcription. Conclusions The GLP-2 analogue ZP1849 increased breaking strength, IGF-1 expression, and cell proliferation, which may be beneficial for colonic anastomotic wound healing.
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Liu W, Xu B, Xue W, Yang B, Fan Y, Chen B, Xiao Z, Xue X, Sun Z, Shu M, Zhang Q, Shi Y, Zhao Y, Dai J. A functional scaffold to promote the migration and neuronal differentiation of neural stem/progenitor cells for spinal cord injury repair. Biomaterials 2020; 243:119941. [DOI: 10.1016/j.biomaterials.2020.119941] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/26/2020] [Accepted: 03/04/2020] [Indexed: 02/06/2023]
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13
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Sumiyoshi H, Nakao S, Endo H, Yanagawa T, Nakano Y, Okamura Y, Kawaguchi AT, Inagaki Y. A Novel Composite Biomaterial Made of Jellyfish and Porcine Collagens Accelerates Dermal Wound Healing by Enhancing Reepithelization and Granulation Tissue Formation in Mice. Adv Wound Care (New Rochelle) 2020; 9:295-311. [PMID: 32286206 DOI: 10.1089/wound.2019.1014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background and Objective: Impaired dermal wound healing represents a major medical issue in today's aging populations. Granulation tissue formation in the dermis and reepithelization of the epidermis are both important and necessary for proper wound healing. Although a number of artificial dermal grafts have been used to treat full-thickness dermal loss in humans, they do not induce reepithelization of the wound, requiring subsequent epithelial transplantation. In the present study, we sought a novel biomaterial that accelerates the wound healing process. Approach: We prepared a composite biomaterial made of jellyfish and porcine collagens and developed a hybrid-type dermal graft that composed of the upper layer film and the lower layer sponge made of this composite biomaterial. Its effect on dermal wound healing was examined using a full-thickness excisional wound model. Structural properties of the dermal graft and histological features of the regenerating skin tissue were characterized by electron microscopic observation and immunohistological examination, respectively. Results: The composite biomaterial film stimulated migration of keratinocytes, leading to prompt reepithelization. The regenerating epithelium consisted of two distinct cell populations: keratin 5-positive basal keratinocytes and more differentiated cells expressing tight junction proteins such as claudin-1 and occludin. At the same time, the sponge made of the composite biomaterial possessed a significantly enlarged intrinsic space and enhanced infiltration of inflammatory cells and fibroblasts, accelerating granulation tissue formation. Innovation: This newly developed composite biomaterial may serve as a dermal graft that accelerates wound healing in various pathological conditions. Conclusion: We have developed a novel dermal graft composed of jellyfish and porcine collagens that remarkably accelerates the wound healing process.
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Affiliation(s)
- Hideaki Sumiyoshi
- Center for Matrix Biology and Medicine, Graduate School of Medicine, Tokai University, Isehara, Japan
- Department of Innovative Medical Science, Tokai University School of Medicine, Isehara, Japan
| | - Sachie Nakao
- Center for Matrix Biology and Medicine, Graduate School of Medicine, Tokai University, Isehara, Japan
- Department of Innovative Medical Science, Tokai University School of Medicine, Isehara, Japan
| | - Hitoshi Endo
- Department of Preventive Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Takayo Yanagawa
- Center for Matrix Biology and Medicine, Graduate School of Medicine, Tokai University, Isehara, Japan
- Department of Innovative Medical Science, Tokai University School of Medicine, Isehara, Japan
| | - Yasuhiro Nakano
- Center for Matrix Biology and Medicine, Graduate School of Medicine, Tokai University, Isehara, Japan
- Department of Innovative Medical Science, Tokai University School of Medicine, Isehara, Japan
| | - Yosuke Okamura
- Course of Industrial Chemistry, Graduate School of Engineering, Tokai University, Hiratsuka, Japan
| | - Akira T. Kawaguchi
- Department of Innovative Medical Science, Tokai University School of Medicine, Isehara, Japan
| | - Yutaka Inagaki
- Center for Matrix Biology and Medicine, Graduate School of Medicine, Tokai University, Isehara, Japan
- Department of Innovative Medical Science, Tokai University School of Medicine, Isehara, Japan
- Instutute of Medical Sciences, Tokai University, Isehara, Japan
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14
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Niu YY, Zhang YY, Zhu Z, Zhang XQ, Liu X, Zhu SY, Song Y, Jin X, Lindholm B, Yu C. Elevated intracellular copper contributes a unique role to kidney fibrosis by lysyl oxidase mediated matrix crosslinking. Cell Death Dis 2020; 11:211. [PMID: 32235836 PMCID: PMC7109154 DOI: 10.1038/s41419-020-2404-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/11/2020] [Accepted: 03/11/2020] [Indexed: 12/17/2022]
Abstract
Copper ions play various roles in mammalian cells, presumably due to their involvement in different enzymatic reactions. Some studies indicated that serum copper correlates with fibrosis in organs, such as liver and lung. However, the mechanism is unknown. Here, we explored the role of copper in kidney fibrosis development and possible underlying mechanisms. We found that copper transporter 1 (CTR1) expression was increased in the kidney tissues in two fibrosis models and in patients with kidney fibrosis. Similar results were also found in renal tubular epithelial cells and fibroblast cells treated with transforming growth factor beta (TGF-β). Mechanistically, the upregulation of CTR1 required Smads-dependent TGF-β signaling pathway and Smad3 directly binded to the promoter of CTR1 in renal fibroblast cells using chromatin immunoprecipitation. Elevated CTR1 induced increase of copper intracellular influx. The elevated intracellular copper ions activated lysyl oxidase (LOX) to enhance the crosslinking of collagen and elastin, which then promoted kidney fibrosis. Reducing intracellular copper accumulation by knocking down CTR1 ameliorated kidney fibrosis in unilateral ureteral obstruction induced renal fibrosis model and renal fibroblast cells stimulated by TGF-β. Treatment with copper chelator tetrathiomolybdate (TM) also alleviated renal fibrosis in vivo and in vitro. In conclusion, intracellular copper accumulation plays a unique role to kidney fibrosis by activating LOX mediated collagen and elastin crosslinking. Inhibition of intracellular copper overload may be a potential portal to alleviate kidney fibrosis.
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Affiliation(s)
- Yang-Yang Niu
- Department of Nephrology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ying-Ying Zhang
- Department of Nephrology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhi Zhu
- Terahertz Technology Innovatio, Research Institute, Shanghai Key Lab of Modern Optical System, Terahertz, Science Cooperative Innovation Center, School of Optical-Electrical Computer, Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Xiao-Qin Zhang
- Department of Nephrology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xi Liu
- Department of Nephrology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Sai-Ya Zhu
- Department of Nephrology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ye Song
- Department of Ultrasound, Zhoupu Hospital, Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Xian Jin
- EnnovaBio Pharmaceuticals Co., Ltd, Shanghai, China
| | - Bengt Lindholm
- Division of Renal Medicine and Baxter Novum, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Chen Yu
- Department of Nephrology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China.
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15
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Obregon-Miano F, Fathi A, Rathsam C, Sandoval I, Deheghani F, Spahr A. Injectable porcine bone demineralized and digested extracellular matrix-PEGDA hydrogel blend for bone regeneration. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:21. [PMID: 31989310 DOI: 10.1007/s10856-019-6354-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 12/27/2019] [Indexed: 06/10/2023]
Abstract
Extracellular matrix (ECM) has a major role in the structural support and cellular processes of organs and tissues. Proteins extracted from the ECM have been used to fabricate different scaffolds for tissue engineering applications. The aims of the present study were to extract, characterize and fabricate a new class of hydrogel with proteins isolated from pig bone ECM and combine them with a synthetic polymer so it could be used to promote bone regeneration. Porcine bone demineralized and digested extracellular matrix (pddECM) containing collagen type I was produced, optimized and sterilized with high pressurized CO2 method. The pddECM was further blended with 20% w/v polyethylene glycol diacrylate (PEGDA) to create an injectable semi interpenetrating polymer network (SIPN) scaffold with enhanced physicochemical properties. The blend tackled the shortfall of natural polymers, such as lack of structural stability and fast degradation, preserving its structure in more than 90% after 30 days of incubation; thus, increasing the material endurance in a simulated physiological environment. The manufactured injectable hydrogel showed high cytocompatibility with hOb and SaOs-2 cells, promoting osteogenic proliferation within 21 days of culture. The hydrogel had a high compression modulus of 520 kPa, low swelling (5.3 mg/mg) and millimetric volume expansion (19.5%), all of which are favorable characteristics for bone regeneration applications.
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Affiliation(s)
- Fabian Obregon-Miano
- Dental School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, 2010, Australia.
- Dental School, Faculty of Medicine and Health, Bioengineering Unit, Westmead Hospital, Centre for Oral Health, Westmead, The University of Sydney, Sydney, NSW, 2145, Australia.
| | - Ali Fathi
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Catherine Rathsam
- Institute for Dental Research IDR, Westmead Hospital, The University of Sydney, Sydney, NSW, 2145, Australia
| | - Isbel Sandoval
- Dental School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, 2010, Australia
| | - Fariba Deheghani
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Axel Spahr
- Dental School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, 2010, Australia
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16
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Topical administration of pullulan gel accelerates skin tissue regeneration by enhancing collagen synthesis and wound contraction in rats. Int J Biol Macromol 2020; 149:395-403. [PMID: 31978478 DOI: 10.1016/j.ijbiomac.2020.01.187] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/16/2019] [Accepted: 01/20/2020] [Indexed: 12/23/2022]
Abstract
Here, we have studied the efficacy of pullulan gel on wound healing by performing biochemical, biophysical and histological investigations. A 2 cm2 open excision wound was made on the dorsum of the rats and topically treated with 500 μL of pullulan gel. The control group was left untreated. The povidone-iodine (PI) ointment treated animals were considered as positive control. The granulation tissues formed were collected at different time point intervals and used for various biochemical, biophysical and histological analyses. Biochemical analyses revealed that pullulan gel significantly (p < 0.001) improved the collagen, hexosamine, protein and DNA content. Biophysical analyses resulted in an increased rate of wound contraction (p < 0.001). The period of epithelialization was shorter (p < 0.001) in pullulan gel treated group (11 days) than control (22 days) and PI group (17 days). Histological evaluation on days 4, 8 and 11 substantiated that pullulan gel treatment improved the wound re-epithelialization, dermal regeneration, blood vessels formation and collagen synthesis than in control and PI groups. Interrupted SDS-PAGE of collagen showed an increase in Type III collagen band evident for the healing potential of pullulan gel. Thus, our results strongly prove that pullulan gel could be a potential wound healing agent.
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17
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Sohutskay DO, Puls TJ, Voytik-Harbin SL. Collagen Self-assembly: Biophysics and Biosignaling for Advanced Tissue Generation. MULTI-SCALE EXTRACELLULAR MATRIX MECHANICS AND MECHANOBIOLOGY 2020. [DOI: 10.1007/978-3-030-20182-1_7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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18
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Manka SW, Bihan D, Farndale RW. Structural studies of the MMP-3 interaction with triple-helical collagen introduce new roles for the enzyme in tissue remodelling. Sci Rep 2019; 9:18785. [PMID: 31827179 PMCID: PMC6906530 DOI: 10.1038/s41598-019-55266-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 11/14/2019] [Indexed: 11/19/2022] Open
Abstract
Matrix metalloproteinase-3 (MMP-3) participates in normal extracellular matrix turnover during embryonic development, organ morphogenesis and wound healing, and in tissue-destruction associated with aneurysm, cancer, arthritis and heart failure. Despite its inability to cleave triple-helical collagens, MMP-3 can still bind to them, but the mechanism, location and role of binding are not known. We used the Collagen Toolkits, libraries of triple-helical peptides that embrace the entire helical domains of collagens II and III, to map MMP-3 interaction sites. The enzyme recognises five sites on collagen II and three sites on collagen III. They share a glycine-phenylalanine-hydroxyproline/alanine (GFO/A) motif that is recognised by the enzyme in a context-dependent manner. Neither MMP-3 zymogen (proMMP-3) nor the individual catalytic (Cat) and hemopexin (Hpx) domains of MMP-3 interact with the peptides, revealing cooperative binding of both domains to the triple helix. The Toolkit binding data combined with molecular modelling enabled us to deduce the putative collagen-binding mode of MMP-3, where all three collagen chains make contacts with the enzyme in the valley running across both Cat and Hpx domains. The observed binding pattern casts light on how MMP-3 could regulate collagen turnover and compete with various collagen-binding proteins regulating cell adhesion and proliferation.
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Affiliation(s)
- Szymon W Manka
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK.
- MRC Prion Unit at UCL, Institute of Prion Diseases, 33 Cleveland Street, London, W1W 7FF, UK.
| | - Dominique Bihan
- Department of Biochemistry, University of Cambridge, Cambridge, UK
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19
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Zhou Y, Lin J, Shao J, Zuo Q, Wang S, Wolff A, Nguyen DT, Rintoul L, Du Z, Gu Y, Peng YY, Ramshaw JAM, Long X, Xiao Y. Aberrant activation of Wnt signaling pathway altered osteocyte mineralization. Bone 2019; 127:324-333. [PMID: 31260814 DOI: 10.1016/j.bone.2019.06.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 06/27/2019] [Accepted: 06/27/2019] [Indexed: 12/20/2022]
Abstract
Mineralization of bone is a dynamic process, involving a complex interplay between cells, secreted macromolecules, signaling pathways, and enzymatic reactions; the dysregulation of bone mineralization may lead to serious skeletal disorders, including hypophosphatemic rickets, osteoporosis, and rheumatoid arthritis. Very few studies have reported the role of osteocytes - the most abundant bone cells in the skeletal system and the major orchestrators of bone remodeling in bone mineralization, which is owed to their nature of being deeply embedded in the mineralized bone matrix. The Wnt/β-catenin signaling pathway is actively involved in various life processes including osteogenesis; however, the role of Wnt/β-catenin signaling in the terminal mineralization of bone, especially in the regulation of osteocytes, is largely unknown. This research demonstrates that during the terminal mineralization process, the Wnt/β-catenin pathway is downregulated, and when Wnt/β-catenin signaling is activated in osteocytes, dendrite development is suppressed and the expression of dentin matrix protein 1 (DMP1) is inhibited. Aberrant activation of Wnt/β-catenin signaling in osteocytes leads to the spontaneous deposition of extra-large mineralized nodules on the surface of collagen fibrils. The altered mineral crystal structure and decreased bonding force between minerals and the organic matrix indicate the inferior integration of minerals and collagen. In conclusion, Wnt/β-catenin signaling plays a critical role in the terminal differentiation of osteocytes and as such, targeting Wnt/β-catenin signaling in osteocytes may serve as a potential therapeutic approach for the management of bone-related diseases.
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Affiliation(s)
- Yinghong Zhou
- Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD 4059, Australia; Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 51050, China; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Jinying Lin
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China; Department of Implantology, Affiliated Stomatological Hospital of Xiamen Medical College, Fujian 361000, China; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Jin Shao
- Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD 4059, Australia; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Qiliang Zuo
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China; Department of Implantology, Affiliated Stomatological Hospital of Xiamen Medical College, Fujian 361000, China; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Shengfang Wang
- Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD 4059, Australia; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Annalena Wolff
- Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Dung Trung Nguyen
- Department of Engineering and Computer Science, Seattle Pacific University, Seattle, WA 98119, USA.
| | - Llew Rintoul
- Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Zhibin Du
- Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD 4059, Australia; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Yuantong Gu
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Yong Y Peng
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3168, Australia.
| | - John A M Ramshaw
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3168, Australia
| | - Xing Long
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Yin Xiao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China; Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD 4059, Australia; Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 51050, China; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
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20
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Preston GW, Phillips DH. Protein Adductomics: Analytical Developments and Applications in Human Biomonitoring. TOXICS 2019; 7:E29. [PMID: 31130613 PMCID: PMC6631498 DOI: 10.3390/toxics7020029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/16/2019] [Accepted: 05/20/2019] [Indexed: 02/07/2023]
Abstract
Proteins contain many sites that are subject to modification by electrophiles. Detection and characterisation of these modifications can give insights into environmental agents and endogenous processes that may be contributing factors to chronic human diseases. An untargeted approach, utilising mass spectrometry to detect modified amino acids or peptides, has been applied to blood proteins haemoglobin and albumin, focusing in particular on the N-terminal valine residue of haemoglobin and the cysteine-34 residue in albumin. Technical developments to firstly detect simultaneously multiple adducts at these sites and then subsequently to identify them are reviewed here. Recent studies in which the methods have been applied to biomonitoring human exposure to environmental toxicants are described. With advances in sensitivity, high-throughput handling of samples and robust quality control, these methods have considerable potential for identifying causes of human chronic disease and of identifying individuals at risk.
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Affiliation(s)
- George W Preston
- Environmental Research Group, Department of Analytical, Environmental and Forensic Science, School of Population Health and Environmental Sciences, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, UK.
| | - David H Phillips
- Environmental Research Group, Department of Analytical, Environmental and Forensic Science, School of Population Health and Environmental Sciences, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, UK.
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21
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Frost BA, Camarero-Espinosa S, Foster EJ. Materials for the Spine: Anatomy, Problems, and Solutions. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E253. [PMID: 30646556 PMCID: PMC6356370 DOI: 10.3390/ma12020253] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 12/28/2018] [Accepted: 01/05/2019] [Indexed: 12/24/2022]
Abstract
Disc degeneration affects 12% to 35% of a given population, based on genetics, age, gender, and other environmental factors, and usually occurs in the lumbar spine due to heavier loads and more strenuous motions. Degeneration of the extracellular matrix (ECM) within reduces mechanical integrity, shock absorption, and swelling capabilities of the intervertebral disc. When severe enough, the disc can bulge and eventually herniate, leading to pressure build up on the spinal cord. This can cause immense lower back pain in individuals, leading to total medical costs exceeding $100 billion. Current treatment options include both invasive and noninvasive methods, with spinal fusion surgery and total disc replacement (TDR) being the most common invasive procedures. Although these treatments cause pain relief for the majority of patients, multiple challenges arise for each. Therefore, newer tissue engineering methods are being researched to solve the ever-growing problem. This review spans the anatomy of the spine, with an emphasis on the functions and biological aspects of the intervertebral discs, as well as the problems, associated solutions, and future research in the field.
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Affiliation(s)
- Brody A Frost
- Department of Materials Science and Engineering, Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, USA.
| | - Sandra Camarero-Espinosa
- Complex Tissue Regeneration Department, MERLN Institute for Technology-inspired Regenerative Medicine, Maastricht University, P.O. Box 616, 6200MD Maastricht, The Netherlands.
| | - E Johan Foster
- Department of Materials Science and Engineering, Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, USA.
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22
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Abstract
Steady-state and pulse-chase collagen analyses are powerful approaches to investigate in vitro the structure of collagen and its kinetic of secretion, respectively. The electrophoretic analysis of purified 3H-proline-labeled collagen allows to determine the nature and post translational modifications of its α chains, whereas short-pulse labeling can be used to follow collagen secretion over time.
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Affiliation(s)
- Antonella Forlino
- Biochemistry Unit, Department of Molecular Medicine, University of Pavia, Pavia, Italy.
| | - Francesca Tonelli
- Biochemistry Unit, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Roberta Besio
- Biochemistry Unit, Department of Molecular Medicine, University of Pavia, Pavia, Italy
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23
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Besio R, Maruelli S, Battaglia S, Leoni L, Villani S, Layrolle P, Rossi A, Trichet V, Forlino A. Early Fracture Healing is Delayed in the Col1a2 +/G610C Osteogenesis Imperfecta Murine Model. Calcif Tissue Int 2018; 103:653-662. [PMID: 30076439 DOI: 10.1007/s00223-018-0461-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 07/30/2018] [Indexed: 01/08/2023]
Abstract
Osteogenesis imperfecta (OI) is a rare heritable skeletal dysplasia mainly caused by type I collagen abnormalities and characterized by bone fragility and susceptibility to fracture. Over 85% of the patients carry dominant mutations in the genes encoding for the collagen type I α1 and α2 chains. Failure of bone union and/or presence of hyperplastic callus formation after fracture were described in OI patients. Here we used the Col1a2+/G610C mouse, carrying in heterozygosis the α2(I)-G610C substitution, to investigate the healing process of an OI bone. Tibiae of 2-month-old Col1a2+/G610C and wild-type littermates were fractured and the healing process was followed at 2, 3, and 5 weeks after injury from fibrous cartilaginous tissue formation to its bone replacement by radiography, micro-computed tomography (µCT), histological and biochemical approaches. In presence of similar fracture types, in Col1a2+/G610C mice an impairment in the early phase of bone repair was detected compared to wild-type littermates. Smaller callus area, callus bone surface, and bone volume associated to higher percentage of cartilage and lower percentage of bone were evident in Col1a2+/G610C at 2 weeks post fracture (wpf) and no change by 3 wpf. Furthermore, the biochemical analysis of collagen extracted from callus 2 wpf revealed in mutants an increased amount of type II collagen, typical of cartilage, with respect to type I, characteristic of bone. This is the first report of a delay in OI bone fracture repair at the modeling phase.
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Affiliation(s)
- Roberta Besio
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Via Taramelli 3B, 27100, Pavia, Italy
| | - Silvia Maruelli
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Via Taramelli 3B, 27100, Pavia, Italy
| | - Severine Battaglia
- INSERM, UMR 1238, PHY-OS, Bone sarcomas and remodeling of calcified tissues, Faculty of Medicine, University of Nantes, Nantes, France
| | - Laura Leoni
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Via Taramelli 3B, 27100, Pavia, Italy
| | - Simona Villani
- Department of Public Health and Experimental and Forensic Medicine, Unit of Biostatistics and Clinical Epidemiology, University of Pavia, Pavia, Italy
| | - Pierre Layrolle
- INSERM, UMR 1238, PHY-OS, Bone sarcomas and remodeling of calcified tissues, Faculty of Medicine, University of Nantes, Nantes, France
| | - Antonio Rossi
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Via Taramelli 3B, 27100, Pavia, Italy
| | - Valerie Trichet
- INSERM, UMR 1238, PHY-OS, Bone sarcomas and remodeling of calcified tissues, Faculty of Medicine, University of Nantes, Nantes, France
| | - Antonella Forlino
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Via Taramelli 3B, 27100, Pavia, Italy.
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Kjaer M, Kristjánsdóttir H, Andersen L, Heegaard AM, Ågren MS, Jorgensen LN. The effect of gender on early colonic anastomotic wound healing. Int J Colorectal Dis 2018; 33:1269-1276. [PMID: 29850942 DOI: 10.1007/s00384-018-3089-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/15/2018] [Indexed: 02/04/2023]
Abstract
PURPOSE Clinically, male patients subjected to colorectal surgery are more prone to develop anastomotic leakage than female patients by unknown mechanisms. Our aim was to investigate the impact of gender on anastomotic wound healing using an experimental model. METHODS One-layer colonic anastomosis was constructed in 8-week-old 28 male and 32 female Sprague-Dawley rats. Animals of one group (n = 30) were sacrificed immediately after surgery day 0 and the other group (n = 30) on postoperative day 3. Anastomotic breaking strength, total collagen (hydroxyproline), soluble collagen (Sircol), matrix metalloproteinase (MMP)-9, and transforming growth factor (TGF)-β1 were measured. RESULTS The anastomotic breaking strength decreased from day 0 to day 3 with no significant gender differences either in the extent of decline (P = 0.122) or absolute day 3 strengths (P = 0.425). Analogously, total collagen concentration in the anastomotic wounds decreased postoperatively and were lower (P = 0.043) in the male compared with the female rats on day 3. MMP-9 levels increased in the anastomoses postoperatively, but they did not differ (P = 0.391) between male and female animals. Soluble collagen levels were lower in the day-3 anastomoses of male versus female rats (P = 0.015) and correlated positively with total TGF-β1 levels (rS = 0.540, P = 0.006). Although TGF-β1 tended to be lower in male compared with the female rats, the differences did not reach statistical significance. CONCLUSION Our findings point towards a less favorable collagen metabolism in colonic anastomoses of male compared with female rats during early wound healing.
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Affiliation(s)
- Marie Kjaer
- Digestive Disease Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark.
| | - Hrefna Kristjánsdóttir
- Digestive Disease Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Line Andersen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Anne-Marie Heegaard
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Magnus S Ågren
- Digestive Disease Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark.,Copenhagen Wound Healing Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Lars N Jorgensen
- Digestive Disease Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
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25
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Wolff A, Klingner N, Thompson W, Zhou Y, Lin J, Peng YY, Ramshaw JAM, Xiao Y. Modelling of focused ion beam induced increases in sample temperature: a case study of heat damage in biological samples. J Microsc 2018; 272:47-59. [PMID: 30019759 DOI: 10.1111/jmi.12731] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 06/08/2018] [Accepted: 06/13/2018] [Indexed: 11/27/2022]
Abstract
Ion beam induced heat damage in soft materials and biological samples is not yet well understood in Focused Ion Beam systems (FIBs). The work presented here discusses the physics behind the ion beam - sample interactions and the effects which lead to increases in sample temperature and potential heat damage. A model by which heat damage can be estimated and which allows parameters to be determined that reduce/prevent heat damage was derived from Fourier's law of heat transfer and compared to finite element simulations, numerical modelling results and experiments. The results suggests that ion beam induced heat damage can be prevented/minimised by reducing the ion beam current (local dose rate), decreasing the beam overlap (reduced local ion dose) and by introducing a blur (increased surface cross-section area, reduced local dose) while sputtering, patterning or imaging soft material and nonresin-embedded biological samples using FIBs. LAY DESCRIPTION FIB/SEMs, which combine a scanning electron microscope with a focused ion beam in a single device, have found increasing interest biological research. The device allows to cut samples at precisely selected areas and reveal sub surface information as well as preparing transmission electron microscope samples from bulk materials. Preparing biological samples has proven to be challenging due to the induced heat damage. This work explores the physics behind the sample cutting and proposes a model and a method, based on physical principles which allows the user to estimate the induced heat during the cutting process and to select cutting parameters which avoid heat damage in the sample.
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Affiliation(s)
- A Wolff
- Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - N Klingner
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
| | - W Thompson
- Heelionics LLC, Los Altos, California, U.S.A
| | - Y Zhou
- Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, Queensland, Australia.,The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology, Brisbane, Queensland, Australia
| | - J Lin
- Department of Implantology, Affiliated Stomatological Hospital of Xiamen Medical College, Fujan, China.,The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology, Brisbane, Queensland, Australia
| | - Y Y Peng
- CSIRO Manufacturing, Bayview Avenue, Clayton, Victoria, Australia
| | - J A M Ramshaw
- CSIRO Manufacturing, Bayview Avenue, Clayton, Victoria, Australia.,Department of Surgery, St. Vincent's Hospital, University of Melbourne, Victoria, Australia
| | - Y Xiao
- Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, Queensland, Australia.,The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology, Brisbane, Queensland, Australia
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26
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Abstract
OBJECTIVE Reconstructive surgery for pelvic organ prolapse is plagued with high failure rates possibly due to impaired healing or regeneration of the vaginal wall. Here, we tested the hypothesis that postoperative administration of local estrogen, direct injection of mesenchymal stem cells (MSCs), or both lead to improved wound healing of the injured vagina in a menopausal rat model. METHODS Ovariectomized rats underwent surgical injury to the posterior vaginal wall and were randomized to treatment with placebo (n = 41), estrogen cream (n = 47), direct injection of MSCs (n = 39), or both (n = 43). RESULTS MSCs did not survive after injection and had no appreciable effects on healing of the vaginal wall. Acute postoperative administration of vaginal estrogen altered the response of the vaginal wall to injury with decreased stiffness, decreased collagen content, and decreased expression of transcripts for matrix components in the stromal compartment. Conversely, vaginal estrogen resulted in marked proliferation of the epithelial layer and increased expression of genes related to epithelial barrier function and protease inhibition. Transcripts for genes involved in chronic inflammation and adaptive immunity were also down-regulated in the estrogenized epithelium. CONCLUSIONS Collectively, these data indicate that, in contrast to the reported positive effects of preoperative estrogen on the uninjured vagina, acute administration of postoperative vaginal estrogen has adverse effects on the early phase of healing of the stromal layer. In contrast, postoperative estrogen plays a positive role in healing of the vaginal epithelium after injury.
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27
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Tong D, Lönnblom E, Yau ACY, Nandakumar KS, Liang B, Ge C, Viljanen J, Li L, Bãlan M, Klareskog L, Chagin AS, Gjertsson I, Kihlberg J, Zhao M, Holmdahl R. A Shared Epitope of Collagen Type XI and Type II Is Recognized by Pathogenic Antibodies in Mice and Humans with Arthritis. Front Immunol 2018; 9:451. [PMID: 29706949 PMCID: PMC5906551 DOI: 10.3389/fimmu.2018.00451] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 02/20/2018] [Indexed: 01/25/2023] Open
Abstract
Background Collagen XI (CXI) is a heterotrimeric molecule with triple helical structure in which the α3(XI) chain is identical to the α1(II) chain of collagen II (CII), but with extensive posttranslational modifications. CXI molecules are intermingled in the cartilage collagen fibers, which are mainly composed of CII. One of the alpha chains in CXI is shared with CII and contains the immunodominant T cell epitope, but it is unclear whether there are shared B cell epitopes as the antibodies tend to recognize the triple helical structures. Methods Mice expressing the susceptible immune response gene Aq were immunized with CII or CXI. Serum antibody responses were measured, monoclonal antibodies were isolated and analyzed for specificity to CII, CXI, and triple helical collagen peptides using bead-based multiplex immunoassays, enzyme-linked immunosorbent assays, and Western blots. Arthritogenicity of the antibodies was investigated by passive transfer experiments. Results Immunization with CII or CXI leads to a strong T and B cell response, including a cross-reactive response to both collagen types. Immunization with CII leads to severe arthritis in mice, with a response toward CXI at the chronic stage, whereas CXI immunization induces very mild arthritis only. A series of monoclonal antibodies to CXI were isolated and of these, the L10D9 antibody bound to both CXI and CII equally strong, with a specific binding for the D3 epitope region of α3(XI) or α1(II) chain. The L10D9 antibody binds cartilage in vivo and induced severe arthritis. In contrast, the L5F3 antibody only showed weak binding and L7D8 antibody has no binding to cartilage and did not induce arthritis. The arthritogenic L10D9 antibody bound to an epitope shared with CII, the triple helical D3 epitope. Antibody levels to the shared D3 epitope were elevated in the sera from mice with arthritis as well as in rheumatoid arthritis. Conclusion CXI is immunologically not exposed in healthy cartilage but contains T and B cell epitopes cross-reactive with CII, which could be activated in both mouse and human arthritis and could evoke an arthritogenic response.
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Affiliation(s)
- Dongmei Tong
- Department of Medical Biochemistry and Biophysics, Section for Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden.,Department of Pathophysiology, Key Laboratory for Shock and Microcirculation Research of Guangdong, Southern Medical University, Guangzhou, China.,Medical Immunopharmacology Research, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Erik Lönnblom
- Department of Medical Biochemistry and Biophysics, Section for Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden
| | - Anthony C Y Yau
- Department of Medical Biochemistry and Biophysics, Section for Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden
| | - Kutty Selva Nandakumar
- Department of Medical Biochemistry and Biophysics, Section for Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden.,Medical Immunopharmacology Research, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Bibo Liang
- Department of Medical Biochemistry and Biophysics, Section for Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden.,Department of Pathophysiology, Key Laboratory for Shock and Microcirculation Research of Guangdong, Southern Medical University, Guangzhou, China
| | - Changrong Ge
- Department of Medical Biochemistry and Biophysics, Section for Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden
| | - Johan Viljanen
- Department of Chemistry-Biomedical Center, Section of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - Lei Li
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Mirela Bãlan
- Department of Medical Biochemistry and Biophysics, Section of Vascular Biology, Karolinska Institute, Stockholm, Sweden
| | - Lars Klareskog
- Rheumatology Unit, Department of Medicine, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Andrei S Chagin
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden.,Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Inger Gjertsson
- Department of Rheumatology and Inflammation Research, University of Gothenburg, Gothenburg, Sweden
| | - Jan Kihlberg
- Department of Chemistry-Biomedical Center, Section of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - Ming Zhao
- Department of Pathophysiology, Key Laboratory for Shock and Microcirculation Research of Guangdong, Southern Medical University, Guangzhou, China
| | - Rikard Holmdahl
- Department of Medical Biochemistry and Biophysics, Section for Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden.,Medical Immunopharmacology Research, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
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28
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Sipilä KH, Drushinin K, Rappu P, Jokinen J, Salminen TA, Salo AM, Käpylä J, Myllyharju J, Heino J. Proline hydroxylation in collagen supports integrin binding by two distinct mechanisms. J Biol Chem 2018; 293:7645-7658. [PMID: 29615493 DOI: 10.1074/jbc.ra118.002200] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 03/23/2018] [Indexed: 11/06/2022] Open
Abstract
Collagens are the most abundant extracellular matrix proteins in vertebrates and have a characteristic triple-helix structure. Hydroxylation of proline residues is critical for helix stability, and diminished prolyl hydroxylase activity causes wide-spread defects in connective tissues. Still, the role of proline hydroxylation in the binding of collagen receptors such as integrins is unclear. Here, we isolated skin collagen from genetically modified mice having reduced prolyl 4-hydroxylase activity. At room temperature, the reduced proline hydroxylation did not affect interactions with the recombinant integrin α2I domain, but at 37 °C, collagen hydroxylation correlated with the avidity of α2I domain binding. Of note, LC-MS/MS analysis of isolated skin collagens revealed no major changes in the hydroxyproline content of the main integrin-binding sites. Thus, the disrupted α2I domain binding at physiological temperatures was most likely due to structural destabilization of the collagenous helix. Integrin α2I binding to the triple-helical GFPGER motif was slightly weaker than to GFOGER (O = hydroxyproline). This phenomenon was more prominent when α1 integrin was tested. Integrin α1β1 expressed on CHO cells and recombinant α1I domain showed remarkably slower binding velocity and weaker avidity to GFPGER when compared with GFOGER. Structural modeling revealed the critical interaction between Arg-218 in α1I and the hydroxyproline residue in the integrin-binding motif. The role of Arg-218 was further validated by testing a variant R218D α1I domain in solid-phase binding assays. Thus, our results show that the lack of proline hydroxylation in collagen can affect integrin binding by a direct mechanism and via structural destabilization of the triple helix.
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Affiliation(s)
- Kalle H Sipilä
- From the Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Kati Drushinin
- the Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, FI-90014 Oulu, Finland, and
| | - Pekka Rappu
- From the Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Johanna Jokinen
- From the Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Tiina A Salminen
- the Structural Bioinformatics Laboratory, Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, FI-20520 Turku, Finland
| | - Antti M Salo
- the Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, FI-90014 Oulu, Finland, and
| | - Jarmo Käpylä
- From the Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Johanna Myllyharju
- the Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, FI-90014 Oulu, Finland, and
| | - Jyrki Heino
- From the Department of Biochemistry, University of Turku, FI-20014 Turku, Finland,
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29
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An experimental toolbox for characterization of mammalian collagen type I in biological specimens. Nat Protoc 2018; 13:507-529. [PMID: 29446773 DOI: 10.1038/nprot.2017.117] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Collagen type I is the most abundant extracellular matrix protein, and collagen type I supramolecular assemblies (e.g., tissue grafts, biomaterials and cell-assembled systems) are used extensively in tissue engineering and regenerative medicine. Many studies, for convenience or economic reasons, do not accurately determine collagen type I purity, concentration, solubility and extent of cross-linking in biological specimens, frequently resulting in erroneous conclusions. In this protocol, we describe solubility; normal, reduced and delayed (interrupted) SDS-PAGE; hydroxyproline; Sircol collagen and Pierce BCA protein; denaturation temperature; ninhydrin/trinitrobenzene sulfonic acid; and collagenase assays and assess them in a diverse range of biological samples (e.g., tissue samples; purified solutions or lyophilized materials; 3D scaffolds, such as sponges and hydrogels; and cell media and layers). Collectively, the described protocols provide a comprehensive, yet fast and readily implemented, toolbox for collagen type I characterization in any biological specimen.
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30
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Conway JRW, Vennin C, Cazet AS, Herrmann D, Murphy KJ, Warren SC, Wullkopf L, Boulghourjian A, Zaratzian A, Da Silva AM, Pajic M, Morton JP, Cox TR, Timpson P. Three-dimensional organotypic matrices from alternative collagen sources as pre-clinical models for cell biology. Sci Rep 2017; 7:16887. [PMID: 29203823 PMCID: PMC5715059 DOI: 10.1038/s41598-017-17177-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 11/22/2017] [Indexed: 12/18/2022] Open
Abstract
Organotypic co-cultures bridge the gap between standard two-dimensional culture and mouse models. Such assays increase the fidelity of pre-clinical studies, to better inform lead compound development and address the increasing attrition rates of lead compounds within the pharmaceutical industry, which are often a result of screening in less faithful two-dimensional models. Using large-scale acid-extraction techniques, we demonstrate a step-by-step process to isolate collagen I from commercially available animal byproducts. Using the well-established rat tail tendon collagen as a benchmark, we apply our novel kangaroo tail tendon collagen as an alternative collagen source for our screening-ready three-dimensional organotypic co-culture platform. Both collagen sources showed equal applicability for invasive, proliferative or survival assessment of well-established cancer models and clinically relevant patient-derived cancer cell lines. Additional readouts were also demonstrated when comparing these alternative collagen sources for stromal contributions to stiffness, organization and ultrastructure via atomic force microscopy, second harmonic generation imaging and scanning electron microscopy, among other vital biological readouts, where only minor differences were found between the preparations. Organotypic co-cultures represent an easy, affordable and scalable model to investigate drug responses within a physiologically relevant 3D platform.
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Affiliation(s)
- James R W Conway
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Claire Vennin
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Aurélie S Cazet
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - David Herrmann
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Kendelle J Murphy
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Sean C Warren
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Lena Wullkopf
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Alice Boulghourjian
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Anaiis Zaratzian
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Andrew M Da Silva
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Marina Pajic
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Jennifer P Morton
- Beatson Institute of Cancer Research, Switchback Road, Bearsden, Glasgow, G61 1BD, UK.,Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1QH, UK
| | - Thomas R Cox
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia. .,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia.
| | - Paul Timpson
- Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia. .,St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia.
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31
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Maldonado PA, Montoya TI, Acevedo JF, Keller PW, Word RA. Effects of vaginal conjugated equine estrogens and ospemifene on the rat vaginal wall and lower urinary tract. Biol Reprod 2017; 96:81-92. [PMID: 28395337 DOI: 10.1095/biolreprod.116.144428] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 11/28/2016] [Indexed: 11/01/2022] Open
Abstract
Although the positive effects of vaginal estrogens and the selective estrogen receptor modulator, ospemifene (OS), on the vaginal epithelium are well recognized, less is known regarding the effects of these therapies on the lower urinary tract or vaginal muscularis. Clinical evidence suggests that vaginally administered estrogen may improve overactive bladder-related symptoms. The objective of this study was to compare the effects of OS, vaginal conjugated equine estrogens (CEE), or both on the vaginal wall and lower urinary tract in a rat model of menopause. Contractile force of the bladder neck, dome, and external urethral sphincter at optimal field stimulation did not differ significantly among treatment groups. Pharmacologic responses to atropine, carbachol, and potassium chloride were similar among groups. Vaginal epithelial thickness and differentiation were differentially regulated by CEE or OS. Ospemifene altered epithelial differentiation pathways in vaginal epithelium in a unique way, and these effects were additive with local CEE. Unless contraindicated, the beneficial effects of vaginal CEE on the vaginal wall outweigh those of OS.
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32
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Good MM, Montoya TI, Shi H, Zhou J, Huang Y, Tang L, Acevedo JF, Word RA. Thermosensitive hydrogels deliver bioactive protein to the vaginal wall. PLoS One 2017; 12:e0186268. [PMID: 29073153 PMCID: PMC5657977 DOI: 10.1371/journal.pone.0186268] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 09/28/2017] [Indexed: 12/14/2022] Open
Abstract
The pathophysiology and natural history of pelvic organ prolapse (POP) are poorly understood. Consequently, our approaches to treatment of POP are limited. Alterations in the extracellular matrix components of pelvic support ligaments and vaginal tissue, including collagen and elastin, have been associated with the development of POP in animals and women. Prior studies have shown the protease MMP-9, a key player of ECM degradation, is upregulated in vaginal tissues from both mice and women with POP. On the other hand, fibulin-5, an elastogenic organizer, has been found to inhibit MMP-9 in the vaginal wall. Hence, we hypothesized that prolonged release of fibulin-5 may delay progression of POP. To test the hypothesis, oligo (ethylene glycol)-based thermosensitive hydrogels were fabricated, characterized and then used to deliver fibulin-5 to the vaginal wall and inhibit MMP-9 activity. The results indicate that hydrogels are cell and tissue compatible. The hydrogels also prolong the ½ life of fibulin-5 in cultured vaginal fibroblasts and in the vaginal wall in vivo. Finally, fibulin-5-containing hydrogels resulted in incorporation of fibulin-5 into the vaginal matrix and inhibition of MMP-9 for several weeks after injection. These results support the idea of fibulin-5 releasing hydrogel being developed as a new treatment for POP.
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Affiliation(s)
- Meadow M. Good
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - T. Ignacio Montoya
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - Haolin Shi
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - Jun Zhou
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, United States of America
| | - YiHui Huang
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, United States of America
| | - Liping Tang
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, United States of America
- * E-mail: (RAW); (LT)
| | - Jesus F. Acevedo
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - R. Ann Word
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
- * E-mail: (RAW); (LT)
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33
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Cissell DD, Link JM, Hu JC, Athanasiou KA. A Modified Hydroxyproline Assay Based on Hydrochloric Acid in Ehrlich's Solution Accurately Measures Tissue Collagen Content. Tissue Eng Part C Methods 2017; 23:243-250. [PMID: 28406755 DOI: 10.1089/ten.tec.2017.0018] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Collagen quantification has long been relevant to biomedical research and clinical practice to characterize tissues and determine disease states. The hydroxyproline assay, while a broadly employed method of quantifying collagen, uses perchloric acid to dissolve Ehrlich's reagent. Since perchloric acid poses occupational safety hazards and high costs, in this study, a new hydroxyproline assay was developed that replaces perchloric acid with a relatively safer and cheaper alternative, hydrochloric acid (HCl). To validate this biochemical technique, first, using either acid to dissolve Ehrlich's reagent, the assays were completed for native and engineered collagenous tissues. No statistical differences were identified between the assays (p = 0.32). Subsequently, both biochemical techniques were compared to amino acid analysis, considered a proteomics gold standard. Interestingly, utilizing HCl in lieu of perchloric acid yielded greater concordance with amino acid analysis (ρc = 0.980) than did the traditional assay (ρc = 0.947); that is, the HCl-based assay more closely estimates hydroxyproline content, and, consequently, true collagen content. Thus, using Ehrlich's reagent containing HCl in the hydroxyproline assay represents an advance in both mitigating laboratory safety hazards and improving biochemical collagen quantification.
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Affiliation(s)
- Derek D Cissell
- 1 Department of Surgical and Radiological Sciences, University of California , Davis, California
| | - Jarrett M Link
- 2 Department of Biomedical Engineering, University of California , Davis, California
| | - Jerry C Hu
- 2 Department of Biomedical Engineering, University of California , Davis, California
| | - Kyriacos A Athanasiou
- 2 Department of Biomedical Engineering, University of California , Davis, California.,3 Department of Orthopedic Surgery, University of California , Davis, California
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34
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Stabilisation of Collagen Sponges by Glutaraldehyde Vapour Crosslinking. Int J Biomater 2017; 2017:8947823. [PMID: 28572823 PMCID: PMC5440788 DOI: 10.1155/2017/8947823] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 04/11/2017] [Indexed: 01/22/2023] Open
Abstract
Glutaraldehyde is a well-recognised reagent for crosslinking and stabilising collagens and other protein-based materials, including gelatine. In some cases, however, the use of solutions can disrupt the structure of the material, for example, by causing rapid dispersion or distortions from surface interactions. An alternative approach that has been explored in a number of individual cases is the use of glutaraldehyde vapour. In this study, the effectiveness of a range of different glutaraldehyde concentrations in the reservoir providing vapour, from 5% to 25% (w/v), has been explored at incubation times from 5 h to 48 h at room temperature. These data show the effectiveness of the glutaraldehyde vapour approach for crosslinking collagen and show that materials with defined, intermediate stability could be obtained, for example, to control resorption rates in vivo.
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Illigens BMW, Casar Berazaluce A, Poutias D, Gasser R, Del Nido PJ, Friehs I. Vascular Endothelial Growth Factor Prevents Endothelial-to-Mesenchymal Transition in Hypertrophy. Ann Thorac Surg 2017; 104:932-939. [PMID: 28483153 DOI: 10.1016/j.athoracsur.2017.01.112] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 01/27/2017] [Accepted: 01/30/2017] [Indexed: 01/19/2023]
Abstract
BACKGROUND In hypertrophy, progressive loss of function caused by impaired diastolic compliance correlates with advancing cardiac fibrosis. Endothelial cells contribute to this process through endothelial-to-mesenchymal transition (EndMT) resulting from inductive signals such as transforming growth factor (TGF-β). Vascular endothelial growth factor (VEGF) has proven effective in preserving systolic function and delaying the onset of failure. In this study, we hypothesize that VEGF inhibits EndMT and prevents cardiac fibrosis, thereby preserving diastolic function. METHODS The descending aorta was banded in newborn rabbits. At 4 and 6 weeks, hypertrophied animals were treated with intrapericardial VEGF protein and compared with controls (n = 7 per group). Weekly transthoracic echocardiography measured peak systolic stress. At 7 weeks, diastolic stiffness was determined through pressure-volume curves, fibrosis by Masson trichrome stain and hydroxyproline assay, EndMT by immunohistochemistry, and activation of TGF-β and SMAD2/3 by quantitative real-time polymerase chain reaction. RESULTS Peak systolic stress was preserved during the entire observation period, and diastolic compliance was maintained in treated animals (hypertrophied: 20 ± 1 vs treated: 11 ± 3 and controls: 12 ± 2; p < 0.05). Collagen was significantly higher in the hypertrophied group by Masson trichrome (hypertrophied: 3.1 ± 0.9 vs treated: 1.8 ± 0.6) and by hydroxyproline assay (hypertrophied: 2.8 ± 0.6 vs treated: 1.4 ± 0.4; p < 0.05). Fluorescent immunostaining showed active EndMT in the hypertrophied group but significantly less in treated hearts, which was directly associated with a significant increase in TGF-β/SMAD-2 messenger RNA expression. CONCLUSIONS EndMT contributes to cardiac fibrosis in hypertrophied hearts. VEGF treatment inhibits EndMT and prevents the deposition of collagen that leads to myocardial stiffness through TGF-β/SMAD-dependent activation. This presents a therapeutic opportunity to prevent diastolic failure and preserve cardiac function in pressure-loaded hearts.
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Affiliation(s)
- Ben M-W Illigens
- Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts
| | - Alejandra Casar Berazaluce
- Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts
| | - Dimitrios Poutias
- Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts
| | - Robert Gasser
- Department of Cardiology, Medical University of Graz, Graz, Austria
| | - Pedro J Del Nido
- Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts
| | - Ingeborg Friehs
- Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts.
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Green EC, Zhang Y, Li H, Minus ML. Gel-spinning of mimetic collagen and collagen/nano-carbon fibers: Understanding multi-scale influences on molecular ordering and fibril alignment. J Mech Behav Biomed Mater 2017; 65:552-564. [DOI: 10.1016/j.jmbbm.2016.08.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 08/15/2016] [Indexed: 11/16/2022]
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McGregor C, Byrne G, Rahmani B, Chisari E, Kyriakopoulou K, Burriesci G. Physical equivalency of wild type and galactose α 1,3 galactose free porcine pericardium; a new source material for bioprosthetic heart valves. Acta Biomater 2016; 41:204-209. [PMID: 27268480 PMCID: PMC4982525 DOI: 10.1016/j.actbio.2016.06.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 05/03/2016] [Accepted: 06/03/2016] [Indexed: 11/26/2022]
Abstract
UNLABELLED Humans make high levels of antibody to carbohydrates with terminal galactose α 1,3 galactose (Gal) modifications. This Gal antigen is widely expressed in other mammals and is present on an array of current animal derived biomedical devices including bioprosthetic heart valves. There is growing interest in using Gal-free animal tissues from Gal knockout pigs (GTKO) as these tissues would not be affected by anti-Gal antibody mediated injury. In this study we compare the composition and biophysical characteristics of glutaraldehyde fixed porcine pericardium from standard and GTKO pigs. We show that with the exception of the Gal antigen which is only present in standard pig tissue both GTKO and standard pig tissue have the same general morphology and collagen content. Moreover uniaxial stress testing and suture retention testing indicate the tissues are equivalent in tensile strength. These studies indicate that genetic disruption of the α-galactosyltransferase (GGTA-1) which blocks synthesis of the Gal antigen has no significant impact on the structural integrity of porcine pericardium and suggest that this tissue could be directly substituted for standard pig pericardium in biomedical devices such as bioprosthetic heart valves. STATEMENT OF SIGNIFICANCE Surgical heart valve replacement is a proven life saving therapy to treat heart valve dysfunction due to birth defects, infection and the effects of aging. Bioprosthetic heart valves (BHV) made from glutaraldehyde fixed animal tissues are an effective durable therapy in older patients (>60years) but exhibit age-dependent structural valve degeneration (SVD) in younger patients (<60years). SVD is principally caused by BHV calcification. Immune injury contributes to age-dependent SVD through the interaction of galactose α 1,3 galactose (Gal) a dominant xenogeneic antigen present on commercial BHVs and universally abundant human anti-Gal antibody. This study measures the tissue equivalency between standard pig pericardium and Gal-free pericardium from genetically modified pigs as a first step towards making Gal-free BHVs.
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Affiliation(s)
| | - Guerard Byrne
- University College London, Institute of Cardiovascular Science, United Kingdom.
| | - Benyamin Rahmani
- University College London, Department of Mechanical Engineering, United Kingdom
| | - Elisa Chisari
- University College London, Institute of Cardiovascular Science, United Kingdom
| | | | - Gaetano Burriesci
- University College London, Department of Mechanical Engineering, United Kingdom
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Kobayashi Y, Huge J, Imamura S, Hamada-Sato N. Study of the cross-reactivity of fish allergens based on a questionnaire and blood testing. Allergol Int 2016; 65:272-9. [PMID: 26875665 DOI: 10.1016/j.alit.2016.01.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 12/28/2015] [Accepted: 01/08/2016] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND Parvalbumin and collagen have been identified as cross-reactive allergens for fish allergies. Although doctors realize that various fish elicit allergies, the targets of food allergen labeling laws were only mackerels and salmons in Japan and mackerels in South Korea. This study aimed to reveal the causative species for fish allergy via questionnaires and blood tests. METHODS Questionnaire research was conducted in Japan via the internet concerning allergies for fish-allergic patients or their family members. Next, IgE reactivities and cross-reactivities of 26 fish species were analyzed using sera obtained from 16 Japanese patients who were allergic to fish parvalbumin or collagen by enzyme-linked immunosorbent assay (ELISA) and inhibition ELISA. RESULTS Questionnaire research revealed that 88% patients cannot eat mackerel and salmon in addition to other fish. In addition, 85% respondents were not satisfied with the current food allergen labeling law. In ELISA analyses, we clarified that pooled serum obtained from patients with fish parvalbumin-specific allergies exhibited IgE reactivity to the extracts of most fish species, and pooled serum obtained from patients with fish collagen-specific allergies displayed IgE reactivity to the extracts of all types of fish. Inhibition ELISA experiments revealed cross-reactivities of parvalbumin or collagen to extracts from all fish tested. CONCLUSIONS Most patients with fish allergies displayed allergic symptoms following the intake of various fish species. In addition, fish parvalbumin and collagen were causative factors of fish allergy and were highly cross-reactive fish panallergens. Therefore, current laws should be revised in Japan and South Korea.
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Shanmugasundaram N, Ravikumar T, Babu M. Comparative Physico-chemical and in Vitro Properties of Fibrillated Collagen Scaffolds from Different Sources. J Biomater Appl 2016; 18:247-64. [PMID: 15070513 DOI: 10.1177/0885328204040945] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Collagen from different sources was isolated and designed as scaffolds to act as a three-dimensional substrate for culturing human skin fibroblasts, which can be used as dermal substitutes. The thermodynamic behavior of the scaffolds developed was analyzed through Differential Scanning Calorimetric (DSC) and Thermogravimetric analysis (TGA). Analysis by Fourier Transform Infrared Spectroscopy (FTIR) revealed the functional groups in the scaffolds and the mechanical stability of various scaffolds was assessed through tensile strength analysis. Human skin fibroblasts were cultured on the developed scaffolds to assess their cellular interaction and behavior, and the morphological characteristics of the cultured fibroblasts were evaluated using Scanning Electron Microscopy (SEM). The collagen scaffold exhibited unique features when developed from various sources and it was observed that cells could grow and proliferate well and spread as a monolayer in the reconstituted collagen scaffold.
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Zgheib C, Hodges M, Hu J, Beason DP, Soslowsky LJ, Liechty KW, Xu J. Mechanisms of mesenchymal stem cell correction of the impaired biomechanical properties of diabetic skin: The role of miR-29a. Wound Repair Regen 2016; 24:237-46. [PMID: 26808714 DOI: 10.1111/wrr.12412] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 01/21/2016] [Indexed: 12/26/2022]
Abstract
Diabetic skin has impaired wound healing properties following injury. We have further shown that diabetic skin has weakened biomechanical properties at baseline. We hypothesize that the biomechanical properties of diabetic skin decline during the progression of the diabetic phenotype, and that this decline is due to the dysregulation of miR-29a, resulting in decreased collagen content. We further hypothesize that treatment with mesenchymal stem cells (MSCs) may improve diabetic wound healing by correction of the dysregulated miR-29a expression. We analyzed the biomechanical properties, collagen gene expression, collagen protein production, and miR-29a levels in skin harvested from 6 to 18 week old mice during the development of the diabetic phenotype. We also examined the correction of these impairments by both MSC treatment and the inhibition of miR-29a. Diabetic skin demonstrated a progressive impairment of biomechanical properties, decreased collagen content, and increased miR-29a levels during the development of the diabetic phenotype. MSC treatment decreased miR-29a levels, increased collagen content, and corrected the impaired biomechanical properties of diabetic skin. Additionally, direct inhibition of miR-29a also increased collagen content in diabetic skin. This decline in the biomechanical properties of diabetic skin during the progression of diabetes may increase the susceptibility of diabetic skin to injury and miR-29a appears to play a key role in this process.
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Affiliation(s)
- Carlos Zgheib
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver-Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Maggie Hodges
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver-Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Junyi Hu
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver-Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - David P Beason
- Department of Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | - Louis J Soslowsky
- Department of Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | - Kenneth W Liechty
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver-Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Junwang Xu
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver-Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
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Gistelinck C, Gioia R, Gagliardi A, Tonelli F, Marchese L, Bianchi L, Landi C, Bini L, Huysseune A, Witten PE, Staes A, Gevaert K, De Rocker N, Menten B, Malfait F, Leikin S, Carra S, Tenni R, Rossi A, De Paepe A, Coucke P, Willaert A, Forlino A. Zebrafish Collagen Type I: Molecular and Biochemical Characterization of the Major Structural Protein in Bone and Skin. Sci Rep 2016; 6:21540. [PMID: 26876635 PMCID: PMC4753508 DOI: 10.1038/srep21540] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 01/26/2016] [Indexed: 12/27/2022] Open
Abstract
Over the last years the zebrafish imposed itself as a powerful model to study skeletal diseases, but a limit to its use is the poor characterization of collagen type I, the most abundant protein in bone and skin. In tetrapods collagen type I is a trimer mainly composed of two α1 chains and one α2 chain, encoded by COL1A1 and COL1A2 genes, respectively. In contrast, in zebrafish three type I collagen genes exist, col1a1a, col1a1b and col1a2 coding for α1(I), α3(I) and α2(I) chains. During embryonic and larval development the three collagen type I genes showed a similar spatio-temporal expression pattern, indicating their co-regulation and interdependence at these stages. In both embryonic and adult tissues, the presence of the three α(I) chains was demonstrated, although in embryos α1(I) was present in two distinct glycosylated states, suggesting a developmental-specific collagen composition. Even though in adult bone, skin and scales equal amounts of α1(I), α3(I) and α2(I) chains are present, the presented data suggest a tissue-specific stoichiometry and/or post-translational modification status for collagen type I. In conclusion, this data will be useful to properly interpret results and insights gained from zebrafish models of skeletal diseases.
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Affiliation(s)
- C Gistelinck
- Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - R Gioia
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Pavia, Italy
| | - A Gagliardi
- Functional Proteomics Lab., Department of Life Sciences, University of Siena, Siena, Italy
| | - F Tonelli
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Pavia, Italy
| | - L Marchese
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Pavia, Italy
| | - L Bianchi
- Functional Proteomics Lab., Department of Life Sciences, University of Siena, Siena, Italy
| | - C Landi
- Functional Proteomics Lab., Department of Life Sciences, University of Siena, Siena, Italy
| | - L Bini
- Functional Proteomics Lab., Department of Life Sciences, University of Siena, Siena, Italy
| | - A Huysseune
- Biology Department, Ghent University, Ghent, Belgium
| | - P E Witten
- Biology Department, Ghent University, Ghent, Belgium
| | - A Staes
- Department of Medical Protein Research, VIB, Ghent, Belgium.,Department of Biochemistry, Ghent University, Ghent, Belgium
| | - K Gevaert
- Department of Medical Protein Research, VIB, Ghent, Belgium.,Department of Biochemistry, Ghent University, Ghent, Belgium
| | - N De Rocker
- Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - B Menten
- Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - F Malfait
- Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - S Leikin
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - S Carra
- Department of Biosciences, University of Milano, Milan, Italy
| | - R Tenni
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Pavia, Italy
| | - A Rossi
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Pavia, Italy
| | - A De Paepe
- Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - P Coucke
- Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - A Willaert
- Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - A Forlino
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, Pavia, Italy
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Reddy RR, Phani Kumar BVN, Shanmugam G, Madhan B, Mandal AB. Molecular Level Insights on Collagen–Polyphenols Interaction Using Spin–Relaxation and Saturation Transfer Difference NMR. J Phys Chem B 2015; 119:14076-85. [DOI: 10.1021/acs.jpcb.5b07911] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. Ravikanth Reddy
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhavan, 2 Rafi Marg, New Delhi 110 001, India
| | - Bandaru V. N. Phani Kumar
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhavan, 2 Rafi Marg, New Delhi 110 001, India
| | - Ganesh Shanmugam
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhavan, 2 Rafi Marg, New Delhi 110 001, India
| | - Balaraman Madhan
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhavan, 2 Rafi Marg, New Delhi 110 001, India
| | - Asit B. Mandal
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhavan, 2 Rafi Marg, New Delhi 110 001, India
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Chiue H, Yamazoye T, Matsumura S. Localization of the dominant non-enzymatic intermolecular cross-linking sites on fibrous collagen. Biochem Biophys Res Commun 2015; 461:445-9. [DOI: 10.1016/j.bbrc.2015.04.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 04/02/2015] [Indexed: 10/23/2022]
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Taniguchi T, Asano Y, Akamata K, Noda S, Takahashi T, Ichimura Y, Toyama T, Trojanowska M, Sato S. Fibrosis, vascular activation, and immune abnormalities resembling systemic sclerosis in bleomycin-treated Fli-1-haploinsufficient mice. Arthritis Rheumatol 2015; 67:517-26. [PMID: 25385187 DOI: 10.1002/art.38948] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 11/04/2014] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Fli-1, a potential predisposing factor for systemic sclerosis (SSc), is constitutively down-regulated in the lesional skin of patients with SSc by an epigenetic mechanism. To investigate the impact of Fli-1 deficiency on the induction of an SSc phenotype in various cell types, we generated bleomycin-induced skin fibrosis in Fli-1(+/-) mice and investigated the molecular mechanisms underlying its phenotypic alterations. METHODS Messenger RNA (mRNA) levels and protein expression of target molecules were examined by quantitative reverse transcription-polymerase chain reaction and immunostaining. Transforming growth factor β (TGFβ) bioassay was used to evaluate the activation of latent TGFβ. The binding of Fli-1 to the target gene promoters was assessed with chromatin immunoprecipitation. RESULTS Bleomycin induced more severe dermal fibrosis in Fli-1(+/-) mice than in wild-type mice. Fli-1 haploinsufficiency activated dermal fibroblasts via the up-regulation of αvβ3 and αvβ5 integrins and activation of latent TGFβ. Dermal fibrosis in Fli-1(+/-) mice was also attributable to endothelial-to-mesenchymal transition, which is directly induced by Fli-1 deficiency and amplified by bleomycin. Th2/Th17-skewed inflammation and increased infiltration of mast cells and macrophages were seen, partly due to the altered expression of cell adhesion molecules in endothelial cells as well as the induction of the skin chemokines. Fli-1(+/-) mouse macrophages preferentially differentiated into an M2 phenotype upon stimulation with interleukin-4 (IL-4) or IL-13. CONCLUSION Our findings provide strong evidence for the fundamental role of Fli-1 deficiency in inducing SSc-like phenotypic alterations in dermal fibroblasts, endothelial cells, and macrophages in a manner consistent with human disease.
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Brings S, Zhang S, Choong YS, Hogl S, Middleditch M, Kamalov M, Brimble MA, Gong D, Cooper GJS. Diabetes-induced alterations in tissue collagen and carboxymethyllysine in rat kidneys: Association with increased collagen-degrading proteinases and amelioration by Cu(II)-selective chelation. Biochim Biophys Acta Mol Basis Dis 2015; 1852:1610-8. [PMID: 25900786 DOI: 10.1016/j.bbadis.2015.04.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/10/2015] [Accepted: 04/13/2015] [Indexed: 02/02/2023]
Abstract
Advanced glycation end-products (AGEs) comprise a group of non-enzymatic post-translational modifications of proteins and are elevated in diabetic tissues. AGE-modification impairs the digestibility of collagen in vitro but little is known about its relation to collagen-degrading proteinases in vivo. N(ε)-carboxymethyllysine (CML) is a stable AGE that forms on lysyl side-chains in the presence of glucose, probably via a transition metal-catalysed mechanism. Here, rats with streptozotocin-induced diabetes and non-diabetic controls were treated for 8weeks with placebo or the Cu(II)-selective chelator, triethylenetetramine (TETA), commencing 8weeks after disease induction. Actions of diabetes and drug treatment were measured on collagen and collagen-degrading proteinases in kidney tissue. The digestibility and CML content of collagen, and corresponding levels of mRNAs and collagen, were related to changes in collagen-degrading-proteinases. Collagen-degrading proteinases, cathepsin L (CTSL) and matrix metalloproteinase-2 (MMP-2) were increased in diabetic rats. CTSL-levels correlated strongly and positively with increased collagen-CML levels and inversely with decreased collagen digestibility in diabetes. The collagen-rich mesangium displayed a strong increase of CTSL in diabetes. TETA treatment normalised kidney collagen content and partially normalised levels of CML and CTSL. These data provide evidence for an adaptive proteinase response in diabetic kidneys, affected by excessive collagen-CML formation and decreased collagen digestibility. The normalisation of collagen and partial normalisation of CML- and CTSL-levels by TETA treatment supports the involvement of Cu(II) in CML formation and altered collagen metabolism in diabetic kidneys. Cu(II)-chelation by TETA may represent a treatment option to rectify collagen metabolism in diabetes independent of alterations in blood glucose levels.
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Affiliation(s)
- Sebastian Brings
- The School of Biological Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand
| | - Shaoping Zhang
- The School of Biological Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand; The Maurice Wilkins Centre for Molecular BioDiscovery, Faculty of Science, University of Auckland, Auckland, New Zealand
| | - Yee S Choong
- The School of Biological Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand
| | - Sebastian Hogl
- The School of Biological Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand
| | - Martin Middleditch
- The School of Biological Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand; The Maurice Wilkins Centre for Molecular BioDiscovery, Faculty of Science, University of Auckland, Auckland, New Zealand
| | - Meder Kamalov
- The Maurice Wilkins Centre for Molecular BioDiscovery, Faculty of Science, University of Auckland, Auckland, New Zealand; The School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Margaret A Brimble
- The Maurice Wilkins Centre for Molecular BioDiscovery, Faculty of Science, University of Auckland, Auckland, New Zealand; The School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Deming Gong
- The School of Biological Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand
| | - Garth J S Cooper
- The School of Biological Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand; The Maurice Wilkins Centre for Molecular BioDiscovery, Faculty of Science, University of Auckland, Auckland, New Zealand; Centre for Advanced Discovery and Experimental Therapeutics, NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, School of Biomedicine, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK; Department of Pharmacology, Division of Medical Sciences, University of Oxford, Oxford, UK.
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Hameed N, Glattauer V, Ramshaw JAM. Evaluation of polyvinyl alcohol composite membranes containing collagen and bone particles. J Mech Behav Biomed Mater 2015; 48:38-45. [PMID: 25913606 DOI: 10.1016/j.jmbbm.2015.04.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 03/31/2015] [Accepted: 04/01/2015] [Indexed: 12/15/2022]
Abstract
Composite biomaterials provide alternative materials that improve on the properties of the individual components and can be used to replace or restore damaged or diseased tissues. Typically, a composite biomaterial consists of a matrix, often a polymer, with one or more fillers that can be made up of particles, sheets or fibres. The polymer matrix can be chosen from a wide range of compositions and can be fabricated easily and rapidly into complex shapes and structures. In the present study we have examined three size fractions of collagen-containing particles embedded at up to 60% w/w in a poly(vinyl alcohol) (PVA) matrix. The particles used were bone particles, which are a mineral-collagen composite and demineralised bone, which gives naturally cross-linked collagen particles. SEM showed well dispersed particles in the PVA matrix for all concentrations and sizes of particles, with FTIR suggesting collagen to PVA hydrogen bonding. Tg of membranes shifted to a slightly lower temperature with increasing collagen content, along with a minor amount of melting point depression. The modulus and tensile strength of membranes were improved with the addition of both particles up to 10 wt%, and were clearly strengthened by the addition, although this effect decreased with higher collagen loadings. Elongation at break decreased with collagen content. Cell adhesion to the membranes was observed associated with the collagen particles, indicating a lack of cytotoxicity.
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Affiliation(s)
- Nishar Hameed
- Institute for Frontier Materials, Deakin University, Pigdons Road, Waurn Ponds, Geelong 3216, Australia.
| | | | - John A M Ramshaw
- CSIRO Manufacturing Flagship, Bayview Avenue, Clayton 3169, Australia.
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Shikh Alsook MK, Gabriel A, Salouci M, Piret J, Alzamel N, Moula N, Denoix JM, Antoine N, Baise E. Characterization of collagen fibrils after equine suspensory ligament injury: an ultrastructural and biochemical approach. Vet J 2015; 204:117-22. [PMID: 25795168 DOI: 10.1016/j.tvjl.2015.02.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 12/12/2014] [Accepted: 02/09/2015] [Indexed: 11/17/2022]
Abstract
Suspensory ligament (SL) injuries are an important cause of lameness in horses. The mechanical properties of connective tissue in normal and pathological ligaments are mainly related to fibril morphology, as well as collagen content and types. The purpose of this study was to evaluate, using biochemical and ultrastructural approaches, the alterations in collagen fibrils after injury. Eight Warmblood horses with visible signs of injury in only one forelimb SL were selected and specimens were examined by transmission electron microscope (TEM). Collagen types I, III and V were purified by differential salt precipitation after collagen extraction with acetic acid containing pepsin. TEM revealed abnormal organization as well as alterations in the diameter and shape of fibrils after SL injury. The bands corresponding to types I, III and V collagen were assessed by densitometry after sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Densitometric analysis indicated that the proportions of type III and type V collagen were higher (P < 0.001) in damaged tissues compared with normal tissues with a mean increase of 20.9% and 17.3%, respectively. Concurrently, a decrease (P < 0.001) in type I collagen within damaged tissues was recorded with a mean decrease of 15.2%. These alterations could be the hallmark of a decrease in the tissue quality and mechanical properties of the ligament. The findings provide new insight for subsequent research on tissue regeneration that may lead to the development of future treatment strategies for SL injury.
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Affiliation(s)
- M K Shikh Alsook
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.
| | - A Gabriel
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - M Salouci
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - J Piret
- Histology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - N Alzamel
- Pathology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - N Moula
- Sustainable Animal Production Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - J-M Denoix
- CIRALE -14430 Goustranville, Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Paris, France
| | - N Antoine
- Histology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - E Baise
- FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
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Montoya TI, Maldonado PA, Acevedo JF, Word RA. Effect of vaginal or systemic estrogen on dynamics of collagen assembly in the rat vaginal wall. Biol Reprod 2014; 92:43. [PMID: 25537371 DOI: 10.1095/biolreprod.114.118638] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The objective of this study was to compare the effects of systemic and local estrogen treatment on collagen assembly and biomechanical properties of the vaginal wall. Ovariectomized nulliparous rats were treated with estradiol or conjugated equine estrogens (CEEs) either systemically, vaginal CEE, or vaginal placebo cream for 4 wk. Low-dose local CEE treatment resulted in increased vaginal epithelial thickness and significant vaginal growth without uterine hyperplasia. Furthermore, vaginal wall distensibility increased without compromise of maximal force at failure. Systemic estradiol resulted in modest increases in collagen type I with no change in collagen type III mRNA. Low-dose vaginal treatment, however, resulted in dramatic increases in both collagen subtypes whereas moderate and high dose local therapies were less effective. Consistent with the mRNA results, low-dose vaginal estrogen resulted in increased total and cross-linked collagen content. The inverse relationship between vaginal dose and collagen expression may be explained in part by progressive downregulation of estrogen receptor-alpha mRNA with increasing estrogen dose. We conclude that, in this menopausal rat model, local estrogen treatment increased total and cross-linked collagen content and markedly stimulated collagen mRNA expression in an inverse dose-effect relationship. High-dose vaginal estrogen resulted in downregulation of estrogen receptor-alpha and loss of estrogen-induced increases in vaginal collagen. These results may have important clinical implications regarding the use of local vaginal estrogen therapy and its role as an adjunctive treatment in women with loss of vaginal support.
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Affiliation(s)
- T Ignacio Montoya
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - P Antonio Maldonado
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Jesus F Acevedo
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - R Ann Word
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
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Antoine EE, Vlachos PP, Rylander MN. Review of collagen I hydrogels for bioengineered tissue microenvironments: characterization of mechanics, structure, and transport. TISSUE ENGINEERING. PART B, REVIEWS 2014; 20:683-96. [PMID: 24923709 PMCID: PMC4241868 DOI: 10.1089/ten.teb.2014.0086] [Citation(s) in RCA: 340] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 05/29/2014] [Indexed: 01/13/2023]
Abstract
Type I collagen hydrogels have been used successfully as three-dimensional substrates for cell culture and have shown promise as scaffolds for engineered tissues and tumors. A critical step in the development of collagen hydrogels as viable tissue mimics is quantitative characterization of hydrogel properties and their correlation with fabrication parameters, which enables hydrogels to be tuned to match specific tissues or fulfill engineering requirements. A significant body of work has been devoted to characterization of collagen I hydrogels; however, due to the breadth of materials and techniques used for characterization, published data are often disjoint and hence their utility to the community is reduced. This review aims to determine the parameter space covered by existing data and identify key gaps in the literature so that future characterization and use of collagen I hydrogels for research can be most efficiently conducted. This review is divided into three sections: (1) relevant fabrication parameters are introduced and several of the most popular methods of controlling and regulating them are described, (2) hydrogel properties most relevant for tissue engineering are presented and discussed along with their characterization techniques, (3) the state of collagen I hydrogel characterization is recapitulated and future directions are proposed. Ultimately, this review can serve as a resource for selection of fabrication parameters and material characterization methodologies in order to increase the usefulness of future collagen-hydrogel-based characterization studies and tissue engineering experiments.
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Affiliation(s)
| | - Pavlos P. Vlachos
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana
| | - Marissa Nichole Rylander
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia
- Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia
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Isolation and characterization of collagen from the muscle of Amur sturgeon (Acipenser schrenckii). BIOTECHNOL BIOPROC E 2014. [DOI: 10.1007/s12257-013-0638-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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