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Cifuentes SJ, Domenech M. Heparin-collagen I bilayers stimulate FAK/ERK½ signaling via α2β1 integrin to support the growth and anti-inflammatory potency of mesenchymal stromal cells. J Biomed Mater Res A 2024; 112:65-81. [PMID: 37723658 DOI: 10.1002/jbm.a.37614] [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: 05/15/2023] [Revised: 08/25/2023] [Accepted: 09/01/2023] [Indexed: 09/20/2023]
Abstract
Understanding mesenchymal stromal cells (MSCs) growth mechanisms in response to surface chemistries is essential to optimize culture methods for high-quality and robust cell yields in cell manufacturing applications. Heparin (HEP) and collagen 1 (COL) substrates have been reported to enhance cell adhesion, growth, viability, and secretory potential in MSCs. However, the biomolecular mechanisms underlying the benefits of combined HEP/COL substrates are unknown. This work used HEP/COL bilayered surfaces to investigate the role of integrin-HEP interactions in the advantages of MSC culture. The layer-by-layer approach (LbL) was used to create HEP/COL bilayers, which were made up of stacks of 8 and 9 layers that combined HEP and COL in an alternate arrangement. Surface spectroscopic investigations and laser scanning microscopy evaluations verified the biochemical fingerprint of each component and a total stacked bilayer thickness of roughly 150 nm. Cell growth and apoptosis in response to IC50 and IC75 levels of BTT-3033 and Cilengitide, α2β1 and αvβ3 integrin inhibitors respectively, were evaluated on HEP/COL coated surfaces using two bone marrow-derived MSC donors. While integrin activity did not affect cell growth rates, it significantly affected cell adhesion and apoptosis on HEP/COL surfaces. HEP-ending HEP/COL surfaces significantly increased FAK-ERK½ phosphorylation and endogenous cell COL deposition compared to COL, COL-ending HEP/COL and uncoated surfaces. BTT-3033 but not Cilengitide treatment markedly affected FAK-ERK½ activity levels on HEP-ending HEP/COL surfaces supporting a major role for α2β1 activity. BTT-3033 treatment on HEP-ending bilayers reduced MSC-mediated macrophage inhibitory activity and altered the cytokine profile of co-cultures. Overall, this study supports a novel role for HEP in regulating the survival and potency of MSCs via enhancing the α2β1-FAK-ERK½ signaling mechanism.
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Affiliation(s)
- Said J Cifuentes
- Bioengineering Graduate Program, University of Puerto Rico Mayaguez, Mayaguez, Puerto Rico, USA
| | - Maribella Domenech
- Bioengineering Graduate Program, University of Puerto Rico Mayaguez, Mayaguez, Puerto Rico, USA
- Department of Chemical Engineering, University of Puerto Rico Mayaguez, Mayaguez, Puerto Rico, USA
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2
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Später T, Assunção M, Lit KK, Gong G, Wang X, Chen YY, Rao Y, Li Y, Yiu CHK, Laschke MW, Menger MD, Wang D, Tuan RS, Khoo KH, Raghunath M, Guo J, Blocki A. Engineering microparticles based on solidified stem cell secretome with an augmented pro-angiogenic factor portfolio for therapeutic angiogenesis. Bioact Mater 2022; 17:526-541. [PMID: 35846945 PMCID: PMC9270501 DOI: 10.1016/j.bioactmat.2022.03.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/22/2022] [Accepted: 03/07/2022] [Indexed: 11/17/2022] Open
Abstract
Tissue (re)vascularization strategies face various challenges, as therapeutic cells do not survive long enough in situ, while the administration of pro-angiogenic factors is hampered by fast clearance and insufficient ability to emulate complex spatiotemporal signaling. Here, we propose to address these limitations by engineering a functional biomaterial capable of capturing and concentrating the pro-angiogenic activities of mesenchymal stem cells (MSCs). In particular, dextran sulfate, a high molecular weight sulfated glucose polymer, supplemented to MSC cultures, interacts with MSC-derived extracellular matrix (ECM) components and facilitates their co-assembly and accumulation in the pericellular space. Upon decellularization, the resulting dextran sulfate-ECM hybrid material can be processed into MIcroparticles of SOlidified Secretome (MIPSOS). The insoluble format of MIPSOS protects protein components from degradation, while facilitating their sustained release. Proteomic analysis demonstrates that MIPSOS are highly enriched in pro-angiogenic factors, resulting in an enhanced pro-angiogenic bioactivity when compared to naïve MSC-derived ECM (cECM). Consequently, intravital microscopy of full-thickness skin wounds treated with MIPSOS demonstrates accelerated revascularization and healing, far superior to the therapeutic potential of cECM. Hence, the microparticle-based solidified stem cell secretome provides a promising platform to address major limitations of current therapeutic angiogenesis approaches. Dextran sulfate assembles with mesenchymal stem cell secretome. As a result, microparticles of solidified stem cell secretome (MIPSOS) are formed. The insoluble MIPSOS format protects proteins from premature degradation. MIPSOS are enriched in pro-angiogenic factors and exhibit gradual release kinetics. MIPSOS demonstrate superior pro-angiogenic properties and thus therapeutic potential.
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Affiliation(s)
- Thomas Später
- Institute for Clinical & Experimental Surgery, Saarland University, Homburg, Saar, Germany
| | - Marisa Assunção
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Kwok Keung Lit
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Guidong Gong
- BMI Center for Biomass Materials and Nanointerfaces, College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan, 610065, China
- Bioproducts Institute, Departments of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada
| | - Xiaoling Wang
- BMI Center for Biomass Materials and Nanointerfaces, College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan, 610065, China
| | - Yi-Yun Chen
- Academia Sinica Common Mass Spectrometry Facilities for Proteomics and Protein Modification Analysis, and Institute of Biological Chemistry, Academia Sinica, Nankang, Taipei, China
| | - Ying Rao
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Yucong Li
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Shun Hing Institute of Advanced Engineering (SHIAE), Faculty of Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Chi Him Kendrick Yiu
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Matthias W. Laschke
- Institute for Clinical & Experimental Surgery, Saarland University, Homburg, Saar, Germany
| | - Michael D. Menger
- Institute for Clinical & Experimental Surgery, Saarland University, Homburg, Saar, Germany
| | - Dan Wang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Ministry of Education Key Laboratory for Regenerative Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong Special Administrative Region of China
| | - Rocky S. Tuan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Kay-Hooi Khoo
- Academia Sinica Common Mass Spectrometry Facilities for Proteomics and Protein Modification Analysis, and Institute of Biological Chemistry, Academia Sinica, Nankang, Taipei, China
| | - Michael Raghunath
- Institute for Chemistry and Biotechnology, Zurich University of Applied Sciences, Wädenswil, Switzerland
| | - Junling Guo
- BMI Center for Biomass Materials and Nanointerfaces, College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan, 610065, China
- Bioproducts Institute, Departments of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan, 610065, China
- Corresponding author. BMI Center for Biomass Materials and Nanointerfaces, College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Anna Blocki
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong Special Administrative Region of China
- Corresponding author. School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong Special Administrative Region of China.
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3
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Vogel S, Ullm F, Müller CD, Pompe T, Hempel U. Impact of binding mode of low-sulfated hyaluronan to 3D collagen matrices on its osteoinductive effect for human bone marrow stromal cells. Biol Chem 2021; 402:1465-1478. [PMID: 34085493 DOI: 10.1515/hsz-2021-0212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 05/26/2021] [Indexed: 12/11/2022]
Abstract
Synthetically sulfated hyaluronan derivatives were shown to facilitate osteogenic differentiation of human bone marrow stromal cells (hBMSC) by application in solution or incorporated in thin collagen-based coatings. In the presented study, using a biomimetic three-dimensional (3D) cell culture model based on fibrillary collagen I (3D Col matrix), we asked on the impact of binding mode of low sulfated hyaluronan (sHA) in terms of adsorptive and covalent binding on osteogenic differentiation of hBMSC. Both binding modes of sHA induced osteogenic differentiation. Although for adsorptive binding of sHA a strong intracellular uptake of sHA was observed, implicating an intracellular mode of action, covalent binding of sHA to the 3D matrix induced also intense osteoinductive effects pointing towards an extracellular mode of action of sHA in osteogenic differentiation. In summary, the results emphasize the relevance of fibrillary 3D Col matrices as a model to study hBMSC differentiation in vitro in a physiological-like environment and that sHA can display dose-dependent osteoinductive effects in dependence on presentation mode in cell culture scaffolds.
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Affiliation(s)
- Sarah Vogel
- Institute of Physiological Chemistry, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Fetscherstrasse 74, D-01307Dresden, Germany
| | - Franziska Ullm
- Institute of Biochemistry, Faculty of Life Sciences, Universität Leipzig, Johannisallee 21-23, D-04103Leipzig, Germany
| | - Claudia Damaris Müller
- Institute of Physiological Chemistry, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Fetscherstrasse 74, D-01307Dresden, Germany
| | - Tilo Pompe
- Institute of Biochemistry, Faculty of Life Sciences, Universität Leipzig, Johannisallee 21-23, D-04103Leipzig, Germany
| | - Ute Hempel
- Institute of Physiological Chemistry, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Fetscherstrasse 74, D-01307Dresden, Germany
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Aligned Collagen-CNT Nanofibrils and the Modulation Effect on Ovarian Cancer Cells. JOURNAL OF COMPOSITES SCIENCE 2021; 5. [PMID: 35664989 PMCID: PMC9164112 DOI: 10.3390/jcs5060148] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Fibrillar collagen is a one-dimensional biopolymer and is the most abundant structural protein in the extracellular matrix (ECM) of connective tissues. Due to the unique properties of carbon nanotubes (CNTs), considerable attention has been given to the application of CNTs in developing biocomposite materials for tissue engineering and drug delivery. When introduced to tissues, CNTs inevitably interact and integrate with collagen and impose a discernible effect on cells in the vicinity. The positive effect of the collagen-CNT (COL-CNT) matrix in tissue regeneration and the cytotoxicity of free CNTs have been investigated extensively. In this study, we aimed to examine the effect of COL-CNT on mediating the interaction between the matrix and SKOV3 ovarian cancer cells. We generated unidirectionally aligned collagen and COL-CNT nanofibrils, mimicking the structure and dimension of collagen fibrils in native tissues. AFM analysis revealed that the one-dimensional structure, high stiffness, and low adhesion of COL-CNT greatly facilitated the polarization of SKOV3 cells by regulating the β−1 integrin-mediated cell–matrix interaction, cytoskeleton rearrangement, and cell migration. Protein and gene level analyses implied that both collagen and COL-CNT matrices induced the epithelial–mesenchymal transition (EMT), and the COL-CNT matrix prompted a higher level of cell transformation. However, the induced cells expressed CD44 at a reduced level and MMP2 at an increased level, and they were responsive to the chemotherapy drug gemcitabine. The results suggested that the COL-CNT matrix induced the transdifferentiation of the epithelial cancer cells to mature, less aggressive, and less potent cells, which are inapt for tumor metastasis and chemoresistance. Thus, the presence of CNT in a collagen matrix is unlikely to cause an adverse effect on cancer patients if a controlled dose of CNT is used for drug delivery or tissue regeneration.
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5
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Bergwik J, Kristiansson A, Larsson J, Ekström S, Åkerström B, Allhorn M. Binding of the human antioxidation protein α 1-microglobulin (A1M) to heparin and heparan sulfate. Mapping of binding site, molecular and functional characterization, and co-localization in vivo and in vitro. Redox Biol 2021; 41:101892. [PMID: 33607500 PMCID: PMC7900767 DOI: 10.1016/j.redox.2021.101892] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/03/2021] [Accepted: 02/04/2021] [Indexed: 12/27/2022] Open
Abstract
Heparin and heparan sulfate (HS) are linear sulfated disaccharide polymers. Heparin is found mainly in mast cells, while heparan sulfate is found in connective tissue, extracellular matrix and on cell membranes in most tissues. α1-microglobulin (A1M) is a ubiquitous protein with thiol-dependent antioxidant properties, protecting cells and matrix against oxidative damage due to its reductase activities and radical- and heme-binding properties. In this work, it was shown that A1M binds to heparin and HS and can be purified from human plasma by heparin affinity chromatography and size exclusion chromatography. The binding strength is inversely dependent of salt concentration and proportional to the degree of sulfation of heparin and HS. Potential heparin binding sites, located on the outside of the barrel-shaped A1M molecule, were determined using hydrogen deuterium exchange mass spectrometry (HDX-MS). Immunostaining of endothelial cells revealed pericellular co-localization of A1M and HS and the staining of A1M was almost completely abolished after treatment with heparinase. A1M and HS were also found to be co-localized in vivo in the lungs, aorta, kidneys and skin of mice. The redox-active thiol group of A1M was unaffected by the binding to HS, and the cell protection and heme-binding abilities of A1M were slightly affected. The discovery of the binding of A1M to heparin and HS provides new insights into the biological role of A1M and represents the basis for a novel method for purification of A1M from plasma.
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Affiliation(s)
- Jesper Bergwik
- Section for Infection Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden.
| | - Amanda Kristiansson
- Section for Infection Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Jörgen Larsson
- Section for Infection Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Simon Ekström
- Swedish National Infrastructure for Biological Mass Spectrometry (BioMS), Lund University, Lund, Sweden
| | - Bo Åkerström
- Section for Infection Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Maria Allhorn
- Section for Infection Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden
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6
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Improved cellular bioactivity by heparin immobilization on polycarbonate film via an aminolysis modification for potential tendon repair. Int J Biol Macromol 2020; 142:835-845. [DOI: 10.1016/j.ijbiomac.2019.09.136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 09/23/2019] [Accepted: 09/30/2019] [Indexed: 12/19/2022]
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7
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Shi J, Ren M, Jia J, Tang M, Guo Y, Ni X, Shi T. Genotype-Phenotype Association Analysis Reveals New Pathogenic Factors for Osteogenesis Imperfecta Disease. Front Pharmacol 2019; 10:1200. [PMID: 31680973 PMCID: PMC6803541 DOI: 10.3389/fphar.2019.01200] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 09/17/2019] [Indexed: 12/12/2022] Open
Abstract
Osteogenesis imperfecta (OI), mainly caused by structural abnormalities of type I collagen, is a hereditary rare disease characterized by increased bone fragility and reduced bone mass. Clinical manifestations of OI mostly include multiple repeated bone fractures, thin skin, blue sclera, hearing loss, cardiovascular and pulmonary system abnormalities, triangular face, dentinogenesis imperfecta (DI), and walking with assistance. Currently, 20 causative genes with 18 subtypes have been identified for OI, of them, variations in COL1A1 and COL1A2 have been demonstrated to be major causative factors to OI. However, the complexity of the bone formation process indicates that there are potential new pathogenic genes associated with OI. To comprehensively explore the underlying mechanism of OI, we conducted association analysis between genotypes and phenotypes of OI diseases and found that mutations in COL1A1 and COL1A2 contributed to a large proportion of the disease phenotypes. We categorized the clinical phenotypes and the genotypes based on the variation types for those 155 OI patients collected from literature, and association study revealed that three phenotypes (bone deformity, DI, walking with assistance) were enriched in two variation types (the Gly-substitution missense and groups of frameshift, nonsense, and splicing variations). We also identified four novel variations (c.G3290A (p.G1097D), c.G3289C (p.G1097R), c.G3289A (p.G1097S), c.G3281A (p.G1094D)) in gene COL1A1 and two novel variations (c.G2332T (p.G778C), c.G2341T (p.G781C)) in gene COL1A2, which could potentially contribute to the disease. In addition, we identified several new potential pathogenic genes (ADAMTS2, COL5A2, COL8A1) based on the integration of protein–protein interaction and pathway enrichment analysis. Our study provides new insights into the association between genotypes and phenotypes of OI and novel information for dissecting the underlying mechanism of the disease.
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Affiliation(s)
- Jingru Shi
- Center for Bioinformatics and Computational Biology, and the Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai, China
| | - Meng Ren
- Center for Bioinformatics and Computational Biology, and the Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai, China
| | - Jinmeng Jia
- Center for Bioinformatics and Computational Biology, and the Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai, China
| | - Muxue Tang
- Center for Bioinformatics and Computational Biology, and the Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai, China
| | - Yongli Guo
- Big Data and Engineering Research Center, Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, National Center for Children's Health, Beijing Pediatric Research Institute, Capital Medical University, Beijing, China.,Biobank for Clinical Data and Samples in Pediatrics, Beijing Children's Hospital, National Center for Children's Health, Beijing Pediatric Research Institute, Capital Medical University, Beijing, China.,Department of Otolaryngology, Head and Neck Surgery, Beijing Children's Hospital, National Center for Children's Health, Capital Medical University, Beijing, China
| | - Xin Ni
- Big Data and Engineering Research Center, Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, National Center for Children's Health, Beijing Pediatric Research Institute, Capital Medical University, Beijing, China.,Biobank for Clinical Data and Samples in Pediatrics, Beijing Children's Hospital, National Center for Children's Health, Beijing Pediatric Research Institute, Capital Medical University, Beijing, China.,Department of Otolaryngology, Head and Neck Surgery, Beijing Children's Hospital, National Center for Children's Health, Capital Medical University, Beijing, China
| | - Tieliu Shi
- Center for Bioinformatics and Computational Biology, and the Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai, China.,Big Data and Engineering Research Center, Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, National Center for Children's Health, Beijing Pediatric Research Institute, Capital Medical University, Beijing, China
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8
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Hoop CL, Kemraj AP, Wang B, Gahlawat S, Godesky M, Zhu J, Warren HR, Case DA, Shreiber DI, Baum J. Molecular underpinnings of integrin binding to collagen-mimetic peptides containing vascular Ehlers-Danlos syndrome-associated substitutions. J Biol Chem 2019; 294:14442-14453. [PMID: 31406019 DOI: 10.1074/jbc.ra119.009685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/06/2019] [Indexed: 11/06/2022] Open
Abstract
Collagens carry out critical extracellular matrix (ECM) functions by interacting with numerous cell receptors and ECM components. Single glycine substitutions in collagen III, which predominates in vascular walls, result in vascular Ehlers-Danlos syndrome (vEDS), leading to arterial, uterine, and intestinal rupture and an average life expectancy of <50 years. Collagen interactions with integrin α2β1 are vital for platelet adhesion and activation; however, how these interactions are impacted by vEDS-associated mutations and by specific amino acid substitutions is unclear. Here, we designed collagen-mimetic peptides (CMPs) with previously reported Gly → Xaa (Xaa = Ala, Arg, or Val) vEDS substitutions within a high-affinity integrin α2β1-binding motif, GROGER. We used these peptides to investigate, at atomic-level resolution, how these amino acid substitutions affect the collagen III-integrin α2β1 interaction. Using a multitiered approach combining biological adhesion assays, CD, NMR, and molecular dynamics (MD) simulations, we found that these substitutions differentially impede human mesenchymal stem cell spreading and integrin α2-inserted (α2I) domain binding to the CMPs and were associated with triple-helix destabilization. Although an Ala substitution locally destabilized hydrogen bonding and enhanced mobility, it did not significantly reduce the CMP-integrin interactions. MD simulations suggested that bulkier Gly → Xaa substitutions differentially disrupt the CMP-α2I interaction. The Gly → Arg substitution destabilized CMP-α2I side-chain interactions, and the Gly → Val change broke the essential Mg2+ coordination. The relationship between the loss of functional binding and the type of vEDS substitution provides a foundation for developing potential therapies for managing collagen disorders.
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Affiliation(s)
- Cody L Hoop
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Allysa P Kemraj
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Baifan Wang
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Sonal Gahlawat
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Madison Godesky
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Jie Zhu
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Haley R Warren
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - David A Case
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - David I Shreiber
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Jean Baum
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
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9
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Saunders JT, Schwarzbauer JE. Fibronectin matrix as a scaffold for procollagen proteinase binding and collagen processing. Mol Biol Cell 2019; 30:2218-2226. [PMID: 31242089 PMCID: PMC6743462 DOI: 10.1091/mbc.e19-03-0140] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The extracellular matrix (ECM) proteins fibronectin (FN) and type I collagen (collagen I) are codistributed in many tissues, and collagens have been shown to depend on an FN matrix for fibrillogenesis. Microscopic analysis of a fibroblast ECM showed colocalization of procollagen I with FN fibrils, and proteolytic cleavage of procollagen to initiate fibril formation was significantly reduced with inhibition of FN matrix assembly. We examined the role of FN matrix in procollagen processing by the C-propeptide proteinase bone morphogenetic protein 1 (BMP-1). We found that BMP-1 binds to a cell-assembled ECM in a dose-dependent manner and that, like procollagen, BMP-1 colocalizes with FN fibrils in the matrix microenvironment. Binding studies with FN fragments identified a binding site in FN’s primary heparin-binding domain. In solution, BMP-1–FN interactions and BMP-1 cleavage of procollagen I were both enhanced by the presence of heparin, suggesting a role for heparin in complex formation during proteolysis. Indeed, addition of heparin enhanced the rate of procollagen cleavage by matrix-bound BMP-1. Our results show that matrix localization of this proteinase facilitates the initiation of collagen assembly and suggest a model in which FN matrix and associated heparan sulfate act as a scaffold to organize enzyme and substrate for procollagen processing.
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Affiliation(s)
- Jared T Saunders
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544-1014
| | - Jean E Schwarzbauer
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544-1014
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10
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Benseny-Cases N, Karamanos TK, Hoop CL, Baum J, Radford SE. Extracellular matrix components modulate different stages in β 2-microglobulin amyloid formation. J Biol Chem 2019; 294:9392-9401. [PMID: 30996004 PMCID: PMC6579475 DOI: 10.1074/jbc.ra119.008300] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/09/2019] [Indexed: 11/26/2022] Open
Abstract
Amyloid deposition of WT human β2-microglobulin (WT-hβ2m) in the joints of long-term hemodialysis patients is the hallmark of dialysis-related amyloidosis. In vitro, WT-hβ2m does not form amyloid fibrils at physiological pH and temperature unless co-solvents or other reagents are added. Therefore, understanding how fibril formation is initiated and maintained in the joint space is important for elucidating WT-hβ2m aggregation and dialysis-related amyloidosis onset. Here, we investigated the roles of collagen I and the commonly administered anticoagulant, low-molecular-weight (LMW) heparin, in the initiation and subsequent aggregation phases of WT-hβ2m in physiologically relevant conditions. Using thioflavin T fluorescence to study the kinetics of amyloid formation, we analyzed how these two agents affect specific stages of WT-hβ2m assembly. Our results revealed that LMW-heparin strongly promotes WT-hβ2m fibrillogenesis during all stages of aggregation. However, collagen I affected WT-hβ2m amyloid formation in contrasting ways: decreasing the lag time of fibril formation in the presence of LMW-heparin and slowing the rate at higher concentrations. We found that in self-seeded reactions, interaction of collagen I with WT-hβ2m amyloid fibrils attenuates surface-mediated growth of WT-hβ2m fibrils, demonstrating a key role of secondary nucleation in WT-hβ2m amyloid formation. Interestingly, collagen I fibrils did not suppress surface-mediated assembly of WT-hβ2m monomers when cross-seeded with fibrils formed from the N-terminally truncated variant ΔN6-hβ2m. Together, these results provide detailed insights into how collagen I and LMW-heparin impact different stages in the aggregation of WT-hβ2m into amyloid, which lead to dramatic effects on the time course of assembly.
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Affiliation(s)
- Núria Benseny-Cases
- From the Astbury Centre for Structural Molecular Biology and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom and
| | - Theodoros K Karamanos
- From the Astbury Centre for Structural Molecular Biology and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom and
| | - Cody L Hoop
- the Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854
| | - Jean Baum
- the Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854
| | - Sheena E Radford
- From the Astbury Centre for Structural Molecular Biology and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom and
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11
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Zhu J, Hoop CL, Case DA, Baum J. Cryptic binding sites become accessible through surface reconstruction of the type I collagen fibril. Sci Rep 2018; 8:16646. [PMID: 30413772 PMCID: PMC6226522 DOI: 10.1038/s41598-018-34616-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 10/12/2018] [Indexed: 01/08/2023] Open
Abstract
Collagen fibril interactions with cells and macromolecules in the extracellular matrix drive numerous cellular functions. Binding motifs for dozens of collagen-binding proteins have been determined on fully exposed collagen triple helical monomers. However, when the monomers are assembled into the functional collagen fibril, many binding motifs become inaccessible, and yet critical cellular processes occur. Here, we have developed an early stage atomic model of the smallest repeating unit of the type I collagen fibril at the fibril surface that provides a novel framework to address questions about these functionally necessary yet seemingly obstructed interactions. We use an integrative approach by combining molecular dynamics (MD) simulations with atomic force microscopy (AFM) experiments and show that reconstruction of the collagen monomers within the complex fibril play a critical role in collagen interactions. In particular, the fibril surface shows three major conformational changes, which allow cryptic binding sites, including an integrin motif involved in platelet aggregation, to be exposed. The observed dynamics and reconstruction of the fibril surface promote its role as a “smart fibril” to keep certain binding sites cryptic, and to allow accessibility of recognition domains when appropriate.
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Affiliation(s)
- Jie Zhu
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey, 08854, USA
| | - Cody L Hoop
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey, 08854, USA
| | - David A Case
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey, 08854, USA
| | - Jean Baum
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey, 08854, USA.
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12
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Chen J, Verni CC, Jouppila A, Lassila R, Diamond SL. Dual antiplatelet and anticoagulant (APAC) heparin proteoglycan mimetic with shear-dependent effects on platelet-collagen binding and thrombin generation. Thromb Res 2018; 169:143-151. [PMID: 30071479 DOI: 10.1016/j.thromres.2018.07.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/28/2018] [Accepted: 07/24/2018] [Indexed: 11/16/2022]
Abstract
Heparin proteoglycans (HEP-PGs) carry standard heparin-mediated anticoagulant properties as well as novel antiplatelet functions, a combination that may be significant for targeting multiple pathways in a single therapy. Recent work developing semisynthetic HEP-PG mimetics has shown promising results also in vivo, however flow conditions in vitro that replicate in vivo hemodynamics have not been reported. In this work, we present several assays (platelet calcium mobilization, aggregometry, microfluidic tests at venous and arterial hemodynamics) to characterize specific mechanistic effects of dual antiplatelet and anticoagulant (APAC) constructs as mimetics of HEP-PGs. Three APACs with different conjugation levels of heparin chains (CL10, CL18, HICL) were shown to decrease platelet deposition to collagen surfaces in PPACK-treated whole blood at venous shear rate (200 s-1). FXIIa-inhibited whole blood (CTI: corn trypsin inhibitor, 40 μg/mL) perfused over collagen/tissue factor showed reduced both platelet and fibrin deposition when treated with APACs. IC50 values for platelet and fibrin inhibition were calculated for each molecule at venous shear rate. Increasing the shear rate to arterial flows (1000 s-1) and using APAC as the sole anticoagulant, resulted in a more potent antiplatelet effect of APAC, suggesting an added effect on von Willebrand Factor (vWF) function. Additionally, APAC caused an inhibition of calcium mobilization specific to thrombin and collagen stimulation and a dose-dependent reduction in collagen-mediated platelet aggregation. Understanding the sensitivity of APAC activity to shear rate, platelet signaling and procoagulant pathways is important for applications in which APAC administration may have beneficial therapeutic effects.
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Affiliation(s)
- Jason Chen
- Department of Chemical and Biomolecular Engineering, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Christopher C Verni
- Department of Chemical and Biomolecular Engineering, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Annukka Jouppila
- Helsinki University Central Hospital Research Institute, Helsinki, Finland
| | - Riitta Lassila
- Coagulation Disorders Unit, University of Helsinki, Departments of Hematology and Clinical Chemistry (HUSLAB Laboratory Services), Comprehensive Cancer Center, Helsinki University Hospital, Helsinki, Finland; Aplagon Oy, Helsinki, Finland
| | - Scott L Diamond
- Department of Chemical and Biomolecular Engineering, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA, USA.
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13
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Xu Z, Zhao W, Wang Z, Yang Y, Sahai N. Structure analysis of collagen fibril at atomic-level resolution and its implications for intra-fibrillar transport in bone biomineralization. Phys Chem Chem Phys 2018; 20:1513-1523. [PMID: 29260165 DOI: 10.1039/c7cp05261h] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Bone is a hierarchical biocomposite material in which a collagen fibril matrix self-assembled in a three-dimensional (3-D) pseudohexagonal array controls many important processes in mineralization such as providing the pathways by which calcium and phosphate species are delivered and a template for the earliest nucleation sites, determining the spatial distribution of the mineral and the topology for binding of associated non-collagenous proteins. However, the structural characteristics of collagen molecules in the fibril remain unclear at the atomic level. Here we performed the first large-scale molecular dynamics simulations to provide a comprehensive all-atom structural analysis of the entire fibril of Type I collagen including intra-fibrillar water distribution. We found that the ideal fibril structure is preserved in specific sites where the earliest nucleation occurs, but is severely distorted in areas that mineralize later. In detail, the ideal pseudohexagonal structure is well-preserved in the overlap zone (c1, c2 and b bands), in the a bands of the hole zone but is severely distorted at the hole/overlap transition (d and c3 bands). As a result, the expected uniform "channel," formed by connecting holes in adjacent unit cells along the b-axis, and having dimensions of 1.5 nm height along the a-axis and width of 40 nm along the c-axis is not formed. The expected uniform channel of 1.5 nm height is preserved only in the a bands in a narrow sub-channel region only 5.8 nm wide. At the hole/overlap transition, an irregular, tortuous sub-channel of widely varying dimensions (∼1.8-4.0 nm height × ∼3.0 nm width) is formed. The well-defined sub-channel in the a bands along with their preferred orientation of charged amino acid residues could facilitate faster molecular diffusion than the tortuous sub-channels and ionic interactions, thus providing the first nucleation sites. Intra-fibrillar water occupies nano-spaces and shows low density (∼0.7 g cm-3), which should promote dehydration of ion species. These results provide the first atomic-level understanding of the structure of the collagen fibril and the properties of the aqueous compartments within the fibril, which offer a physical, chemical and steric explanation for calcium phosphate infiltration paths and for the initiation of mineralization at the a band collagen fibril. The mechanism revealed here for the observed specificity of collagen biomineralization in bone formation ultimately contributes to the biochemical and biomechanical functions of the skeleton.
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Affiliation(s)
- Zhijun Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China.
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14
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Lin C, Romero R, Sorokina LV, Ballinger KR, Place LW, Kipper MJ, Khetani SR. A polyelectrolyte multilayer platform for investigating growth factor delivery modes in human liver cultures. J Biomed Mater Res A 2017; 106:971-984. [PMID: 29139224 DOI: 10.1002/jbm.a.36293] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 09/19/2017] [Accepted: 10/26/2017] [Indexed: 01/19/2023]
Abstract
Polyelectrolyte multilayers (PEMs) of chitosan and heparin are useful for mimicking growth factor (GF) binding to extracellular matrix (ECM) as in vivo. Here, we developed a PEM platform for delivering bound/adsorbed GFs to monocultures of primary human hepatocytes (PHHs) and PHH/non-parenchymal cell (NPC) co-cultures, which are useful for drug development and regenerative medicine. The effects of ECM protein coating (collagen I, fibronectin, and Matrigel®) and terminal PEM layer on PHH attachment/functions were determined. Then, heparin-terminated/fibronectin-coated PEMs were used to deliver varying concentrations of an adsorbed model GF, transforming growth factor β (TGFβ), to PHH monocultures while using soluble TGFβ delivery via culture medium as the conventional control. Soluble TGFβ delivery caused a severe, monotonic, and sustained downregulation of all PHH functions measured (albumin and urea secretions, cytochrome-P450 2A6 and 3A4 enzyme activities), whereas adsorbed TGFβ delivery caused transient upregulation of 3 out of 4 functions. Finally, functionally stable co-cultures of PHHs and 3T3-J2 murine embryonic fibroblasts were created on the heparin-terminated/fibronectin-coated PEMs modified with adsorbed TGFβ to elucidate similarities and differences in functional response relative to the monocultures. In conclusion, chitosan-heparin PEMs constitute a robust platform for investigating the effects of GF delivery modes on PHH monocultures and PHH/NPC co-cultures. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 971-984, 2018.
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Affiliation(s)
- Christine Lin
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado.,Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois
| | - Raimundo Romero
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado
| | - Lioudmila V Sorokina
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois
| | - Kimberly R Ballinger
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado
| | - Laura W Place
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado
| | - Matt J Kipper
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado.,Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado
| | - Salman R Khetani
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado.,Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois.,Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado
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15
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Hoop CL, Zhu J, Nunes AM, Case DA, Baum J. Revealing Accessibility of Cryptic Protein Binding Sites within the Functional Collagen Fibril. Biomolecules 2017; 7:biom7040076. [PMID: 29104255 PMCID: PMC5745458 DOI: 10.3390/biom7040076] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/23/2017] [Accepted: 10/27/2017] [Indexed: 11/16/2022] Open
Abstract
Fibrillar collagens are the most abundant proteins in the extracellular matrix. Not only do they provide structural integrity to all of the connective tissues in the human body, but also their interactions with multiple cell receptors and other matrix molecules are essential to cell functions, such as growth, repair, and cell adhesion. Although specific binding sequences of several receptors have been determined along the collagen monomer, processes by which collagen binding partners recognize their binding sites in the collagen fibril, and the critical driving interactions, are poorly understood. The complex molecular assembly of bundled triple helices within the collagen fibril makes essential ligand binding sites cryptic or hidden from the molecular surface. Yet, critical biological processes that require collagen ligands to have access to interaction sites still occur. In this contribution, we will discuss the molecular packing of the collagen I fibril from the perspective of how collagen ligands access their known binding regions within the fibril, and we will present our analysis of binding site accessibility from the fibril surface. Understanding the basis of these interactions at the atomic level sets the stage for developing drug targets against debilitating collagen diseases and using collagen as drug delivery systems and new biomaterials.
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Affiliation(s)
- Cody L Hoop
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA.
| | - Jie Zhu
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA.
| | - Ana Monica Nunes
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA.
| | - David A Case
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA.
| | - Jean Baum
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA.
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16
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Kulke M, Geist N, Friedrichs W, Langel W. Molecular dynamics simulations on networks of heparin and collagen. Proteins 2017; 85:1119-1130. [DOI: 10.1002/prot.25277] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/07/2017] [Accepted: 02/21/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Martin Kulke
- Institut für Biochemie, Ernst-Moritz-Arndt-Universität Greifswald; Felix-Hausdorff-Straße 4 Greifswald 17487 Germany
| | - Norman Geist
- Institut für Biochemie, Ernst-Moritz-Arndt-Universität Greifswald; Felix-Hausdorff-Straße 4 Greifswald 17487 Germany
| | - Wenke Friedrichs
- Institut für Biochemie, Ernst-Moritz-Arndt-Universität Greifswald; Felix-Hausdorff-Straße 4 Greifswald 17487 Germany
| | - Walter Langel
- Institut für Biochemie, Ernst-Moritz-Arndt-Universität Greifswald; Felix-Hausdorff-Straße 4 Greifswald 17487 Germany
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17
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Unser S, Holcomb S, Cary R, Sagle L. Collagen-Gold Nanoparticle Conjugates for Versatile Biosensing. SENSORS (BASEL, SWITZERLAND) 2017; 17:E378. [PMID: 28212282 PMCID: PMC5335965 DOI: 10.3390/s17020378] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/08/2017] [Accepted: 02/10/2017] [Indexed: 01/08/2023]
Abstract
Integration of noble metal nanoparticles with proteins offers promising potential to create a wide variety of biosensors that possess both improved selectivity and versatility. The multitude of functionalities that proteins offer coupled with the unique optical properties of noble metal nanoparticles can allow for the realization of simple, colorimetric sensors for a significantly larger range of targets. Herein, we integrate the structural protein collagen with 10 nm gold nanoparticles to develop a protein-nanoparticle conjugate which possess the functionality of the protein with the desired colorimetric properties of the nanoparticles. Applying the many interactions that collagen undergoes in the extracellular matrix, we are able to selectively detect both glucose and heparin with the same collagen-nanoparticle conjugate. Glucose is directly detected through the cross-linking of the collagen fibrils, which brings the attached nanoparticles into closer proximity, leading to a red-shift in the LSPR frequency. Conversely, heparin is detected through a competition assay in which heparin-gold nanoparticles are added to solution and compete with heparin in the solution for the binding sites on the collagen fibrils. The collagen-nanoparticle conjugates are shown to detect both glucose and heparin in the physiological range. Lastly, glucose is selectively detected in 50% mouse serum with the collagen-nanoparticle devices possessing a linear range of 3-25 mM, which is also within the physiologically relevant range.
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Affiliation(s)
- Sarah Unser
- Department of Chemistry, College of Arts and Sciences, University of Cincinnati, 301 West Clifton Court, Cincinnati, OH 45221-0172, USA.
| | - Samuel Holcomb
- Department of Chemistry, College of Arts and Sciences, University of Cincinnati, 301 West Clifton Court, Cincinnati, OH 45221-0172, USA.
| | - ReJeana Cary
- Department of Chemistry, College of Arts and Sciences, University of Cincinnati, 301 West Clifton Court, Cincinnati, OH 45221-0172, USA.
| | - Laura Sagle
- Department of Chemistry, College of Arts and Sciences, University of Cincinnati, 301 West Clifton Court, Cincinnati, OH 45221-0172, USA.
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18
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19
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Carretero A, Soares da Costa D, Reis RL, Pashkuleva I. Extracellular matrix-inspired assembly of glycosaminoglycan–collagen fibers. J Mater Chem B 2017; 5:3103-3106. [DOI: 10.1039/c7tb00704c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We report on the fabrication of fibers exclusively from the extracellular matrix components by interfacial complexation without using any crosslinking agent.
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Affiliation(s)
- A. Carretero
- 3B's Research Group—Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- 4805-017 Taipas
| | - D. Soares da Costa
- 3B's Research Group—Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- 4805-017 Taipas
| | - R. L. Reis
- 3B's Research Group—Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- 4805-017 Taipas
| | - I. Pashkuleva
- 3B's Research Group—Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- 4805-017 Taipas
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20
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Collier TA, Nash A, Birch HL, de Leeuw NH. Intra-molecular lysine-arginine derived advanced glycation end-product cross-linking in Type I collagen: A molecular dynamics simulation study. Biophys Chem 2016; 218:42-46. [PMID: 27648753 PMCID: PMC5068345 DOI: 10.1016/j.bpc.2016.09.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 09/12/2016] [Indexed: 01/31/2023]
Abstract
Covalently cross-linked advanced glycation end products (AGE) are among the major post-translational modifications to proteins as a result of non-enzymatic glycation. The formation of AGEs has been shown to have adverse effects on the properties of the collagenous tissue; they are even linked to a number of age related disorders. Little is known about the sites at which these AGEs form or why certain sites within the collagen are energetically more favourable than others. In this study we have used a proven fully atomistic molecular dynamics approach to identify six sites where the formation of the intra-molecular 3-deoxyglucosone-derived imidazolium cross-link (DOGDIC) is energetically favourable. We have also conducted a comparison of these positions with those of the more abundant glucosepane cross-link, to determine any site preference. We show that when we consider both lysine and arginine AGEs, they exhibit a prevalence to form within the gap region of the collagen fibril.
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Affiliation(s)
- Thomas A Collier
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Anthony Nash
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Helen L Birch
- Institute of Orthopaedics and Musculoskeletal Science, UCL, RNOH Stanmore Campus, London, United Kingdom
| | - Nora H de Leeuw
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom; School of Chemistry, Cardiff University, Cardiff CF10 1DF, United Kingdom.
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21
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Lee J, Wee S, Gunaratne J, Chua RJE, Smith RAA, Ling L, Fernig DG, Swaminathan K, Nurcombe V, Cool SM. Structural determinants of heparin-transforming growth factor-β1 interactions and their effects on signaling. Glycobiology 2015; 25:1491-504. [PMID: 26306634 DOI: 10.1093/glycob/cwv064] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 08/08/2015] [Indexed: 12/28/2022] Open
Abstract
Transforming growth factor-β1 (TGF-β1, Uniprot: P01137) is a heparin-binding protein that has been implicated in a number of physiological processes, including the initiation of chondrogenesis by human mesenchymal stem cells (hMSCs). Here, we identify the molecular features in the protein and in heparin required for binding and their effects on the potentiation of TGF-β1's activity on hMSCs. Using a proteomics "Protect and Label" approach, lysines K291, K304, K309, K315, K338, K373, K375 and K388 were identified as being directly involved in binding heparin (Data are available via ProteomeXchange with identifier PXD002772). Competition assays in an optical biosensor demonstrated that TGF-β1 does require N- and 6-O-sulfate groups for binding but that 2-O-sulfate groups are unlikely to underpin the interaction. Heparin-derived oligosaccharides as short as degree of polymerization (dp) 4 have a weak ability to compete for TGF-β1 binding to heparin, which increases with the length of the oligosaccharide to reach a maximum between dp18 and dp24. In cell-based assays, heparin, 2-O-, 6-O- and N-desulfated re-N-acetylated heparin and oligosaccharides 14-24 saccharides (dp14-24) in length all increased the phosphorylation of mothers against decapentaplegic homolog 2 (SMAD2) after 6 h of stimulation with TGF-β1. The results provide the structural basis for a model of heparin/heparan sulfate binding to TGF-β1 and demonstrate that the features in the polysaccharide required for binding are not identical to those required for sustaining the signaling by TGF-β1 in hMSCs.
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Affiliation(s)
- Jonathan Lee
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore 117456 Glycotherapeutics Group, Institute of Medical Biology, Agency for Science, Technology and Research, Singapore, Singapore 138648
| | - Sheena Wee
- Quantitative Proteomics Group, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore 138673
| | - Jayantha Gunaratne
- Quantitative Proteomics Group, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore 138673
| | - R J E Chua
- Glycotherapeutics Group, Institute of Medical Biology, Agency for Science, Technology and Research, Singapore, Singapore 138648
| | - Raymond A A Smith
- Glycotherapeutics Group, Institute of Medical Biology, Agency for Science, Technology and Research, Singapore, Singapore 138648
| | - Ling Ling
- Glycotherapeutics Group, Institute of Medical Biology, Agency for Science, Technology and Research, Singapore, Singapore 138648
| | - David G Fernig
- Department of Biochemistry, Institute of Integrative Biology, University of Liverpool, Liverpool L69 7ZB, UK
| | | | - Victor Nurcombe
- Glycotherapeutics Group, Institute of Medical Biology, Agency for Science, Technology and Research, Singapore, Singapore 138648 Lee Kong Chian School of Medicine, Nanyang Technological University-Imperial College, Singapore, Singapore 639798
| | - Simon M Cool
- Glycotherapeutics Group, Institute of Medical Biology, Agency for Science, Technology and Research, Singapore, Singapore 138648 Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore 119228
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22
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Gallagher J. Fell-Muir Lecture: Heparan sulphate and the art of cell regulation: a polymer chain conducts the protein orchestra. Int J Exp Pathol 2015; 96:203-31. [PMID: 26173450 PMCID: PMC4561558 DOI: 10.1111/iep.12135] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 05/22/2015] [Indexed: 12/12/2022] Open
Abstract
Heparan sulphate (HS) sits at the interface of the cell and the extracellular matrix. It is a member of the glycosaminoglycan family of anionic polysaccharides with unique structural features designed for protein interaction and regulation. Its client proteins include soluble effectors (e.g. growth factors, morphogens, chemokines), membrane receptors and cell adhesion proteins such as fibronectin, fibrillin and various types of collagen. The protein-binding properties of HS, together with its strategic positioning in the pericellular domain, are indicative of key roles in mediating the flow of regulatory signals between cells and their microenvironment. The control of transmembrane signalling is a fundamental element in the complex biology of HS. It seems likely that, in some way, HS orchestrates diverse signalling pathways to facilitate information processing inside the cell. A dictionary definition of an orchestra is 'a large group of musicians who play together on various instruments …' to paraphrase, the HS orchestra is 'a large group of proteins that play together on various receptors'. HS conducts this orchestra to ensure that proteins hit the right notes on their receptors but, in the manner of a true conductor, does it also set 'the musical pulse' and create rhythm and harmony attractive to the cell? This is too big a question to answer but fun to think about as you read this review.
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Affiliation(s)
- John Gallagher
- Cancer Research UK Manchester Institute, Institute of Cancer Sciences, Paterson Building, University of Manchester, Manchester, UK
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23
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Collier TA, Nash A, Birch HL, de Leeuw NH. Preferential sites for intramolecular glucosepane cross-link formation in type I collagen: A thermodynamic study. Matrix Biol 2015; 48:78-88. [PMID: 26049074 PMCID: PMC4659457 DOI: 10.1016/j.matbio.2015.06.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/29/2015] [Accepted: 06/01/2015] [Indexed: 11/30/2022]
Abstract
The extracellular matrix (ECM) undergoes progressive age-related stiffening and loss of proteolytic digestibility due to an increase in concentration of advanced glycation end products (AGEs). The most abundant AGE, glucosepane, accumulates in collagen with concentrations over 100 times greater than all other AGEs. Detrimental collagen stiffening properties are believed to play a significant role in several age-related diseases such as osteoporosis and cardiovascular disease. Currently little is known of the potential location of covalently cross-linked glucosepane formation within collagen molecules; neither are there reports on how the respective cross-link sites affect the physical and biochemical properties of collagen. Using fully atomistic molecular dynamics simulations (MD) we have identified six sites where the formation of a covalent intra-molecular glucosepane cross-link within a single collagen molecule in a fibrillar environment is energetically favourable. Identification of these favourable sites enables us to align collagen cross-linking with experimentally observed changes to the ECM. For example, formation of glucosepane was found to be energetically favourable within close proximity of the Matrix Metalloproteinase-1 (MMP1) binding site, which could potentially disrupt collagen degradation. We conduct fully atomistic molecular dynamics simulation of fibrillar collagen. Glucosepane cross-link formation is energetically favourable at six positions. Positions identified are within key collagen biomolecule sites. Positioning of sites may have a significant effect on tissue function and integrity.
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Affiliation(s)
- Thomas A Collier
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom.
| | - Anthony Nash
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
| | - Helen L Birch
- Institute of Orthopaedics and Musculoskeletal Science, UCL, RNOH Stanmore Campus, London, United Kingdom
| | - Nora H de Leeuw
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
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24
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Nordling S, Hong J, Fromell K, Edin F, Brännström J, Larsson R, Nilsson B, Magnusson PU. Vascular repair utilising immobilised heparin conjugate for protection against early activation of inflammation and coagulation. Thromb Haemost 2015; 113:1312-22. [PMID: 25740465 DOI: 10.1160/th14-09-0724] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 01/09/2015] [Indexed: 01/02/2023]
Abstract
Ischaemia-reperfusion injury (IRI) poses a major challenge in many thrombotic conditions and in whole organ transplantation. Activation of the endothelial cells and shedding of the protective vascular glycocalyx during IRI increase the risk of innate immune activation, cell infiltration and severe thrombus formation, promoting damage to the tissue. Here, we present a novel one-step strategy to protect the vasculature by immobilisation of a unique multi-arm heparin conjugate to the endothelium. Applying a new in vitro blood endothelial cell chamber model, the heparin conjugate was found to bind not only to primary human endothelial cells but also directly to the collagen to which the cells adhered. Incubation of hypoxic endothelial cells with freshly drawn human blood in the blood chambers elicited coagulation activation reflected by thrombin anti-thrombin formation and binding of platelets and neutrophils. Immobilisation of the heparin conjugate to the hypoxic endothelial cells created a protective coating, leading to a significant reduction of the recruitment of blood cells and coagulation activation compared to untreated hypoxic endothelial cells. This novel approach of immobilising multi-arm heparin conjugates on the endothelial cells and collagen of the basement membrane ensures to protect the endothelium against IRI in thrombotic disorders and in transplantation.
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Affiliation(s)
| | | | | | | | | | | | | | - Peetra U Magnusson
- Peetra Magnusson, Department of Immunology, Genetics and Pathology, The Rudbeck Laboratory, Dag Hammarskjolds vag 20, SE-751 85 Uppsala, Sweden, Tel.: +46 723888418, Fax: +46 186110222, E-mail:
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25
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Lim HC, Multhaupt HAB, Couchman JR. Cell surface heparan sulfate proteoglycans control adhesion and invasion of breast carcinoma cells. Mol Cancer 2015; 14:15. [PMID: 25623282 PMCID: PMC4326193 DOI: 10.1186/s12943-014-0279-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 12/22/2014] [Indexed: 12/31/2022] Open
Abstract
Background Cell surface proteoglycans interact with numerous regulators of cell behavior through their glycosaminoglycan chains. The syndecan family of transmembrane proteoglycans are virtually ubiquitous cell surface receptors that are implicated in the progression of some tumors, including breast carcinoma. This may derive from their regulation of cell adhesion, but roles for specific syndecans are unresolved. Methods The MDA-MB231 human breast carcinoma cell line was exposed to exogenous glycosaminoglycans and changes in cell behavior monitored by western blotting, immunocytochemistry, invasion and collagen degradation assays. Selected receptors including PAR-1 and syndecans were depleted by siRNA treatments to assess cell morphology and behavior. Immunohistochemistry for syndecan-2 and its interacting partner, caveolin-2 was performed on human breast tumor tissue arrays. Two-tailed paired t-test and one-way ANOVA with Tukey’s post-hoc test were used in the analysis of data. Results MDA-MB231 cells were shown to be highly sensitive to exogenous heparan sulfate or heparin, promoting increased spreading, focal adhesion and adherens junction formation with concomitantly reduced invasion and matrix degradation. The molecular basis for this effect was revealed to have two components. First, thrombin inhibition contributed to enhanced cell adhesion and reduced invasion. Second, a specific loss of cell surface syndecan-2 was noted. The ensuing junction formation was dependent on syndecan-4, whose role in promoting actin cytoskeletal organization is known. Syndecan-2 interacts with, and may regulate, caveolin-2. Depletion of either molecule had the same adhesion-promoting influence, along with reduced invasion, confirming a role for this complex in maintaining the invasive phenotype of mammary carcinoma cells. Finally, both syndecan-2 and caveolin-2 were upregulated in tissue arrays from breast cancer patients compared to normal mammary tissue. Moreover their expression levels were correlated in triple negative breast cancers. Conclusion Cell surface proteoglycans, notably syndecan-2, may be important regulators of breast carcinoma progression through regulation of cytoskeleton, cell adhesion and invasion.
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Affiliation(s)
- Hooi Ching Lim
- Department of Biomedical Sciences and Biotech Research & Innovation Center, University of Copenhagen, Biocenter, Ole Maaløes Vej 5, 2200, Copenhagen N, Denmark. .,Current address: Stem Cell Center, Lund University, Lund, Sweden.
| | - Hinke A B Multhaupt
- Department of Biomedical Sciences and Biotech Research & Innovation Center, University of Copenhagen, Biocenter, Ole Maaløes Vej 5, 2200, Copenhagen N, Denmark.
| | - John R Couchman
- Department of Biomedical Sciences and Biotech Research & Innovation Center, University of Copenhagen, Biocenter, Ole Maaløes Vej 5, 2200, Copenhagen N, Denmark.
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Kumar VA, Caves JM, Haller CA, Dai E, Li L, Grainger S, Chaikof EL. Collagen-Based Substrates with Tunable Strength for Soft Tissue Engineering. Biomater Sci 2013; 1:10.1039/C3BM60129C. [PMID: 24349707 PMCID: PMC3857634 DOI: 10.1039/c3bm60129c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Through the use of mechanical reinforcement of collagen matrices, mechanically strong and compliant 3D tissue mimetic scaffolds can be generated that act as scaffolds for soft tissue engineering. Collagen has been widely used for the development of materials for repair, augmentation or replacement of damaged or diseased tissue. Herein we describe a facile method for the layer-by-layer fabrication of robust planar collagen fiber constructs. Collagen gels cast in a phosphate buffer were dried to form dense collagen mats. Subsequent gels were layered and dried atop mats to create multilayer constructs possessing a range of tunable strengths (0.5 - 11 MPa) and stiffness (1 - 115 MPa). Depending on processing conditions and crosslinking of constructs, strain to failure ranged between 9 to 48%. Collagen mats were constructed into hernia patches that prevented hernia recurrence in Wistar rats.
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Affiliation(s)
- Vivek A. Kumar
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
- Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, MA 02215
- Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, GA 30332
| | - Jeffrey M. Caves
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
- Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, MA 02215
| | - Carolyn A. Haller
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
- Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, MA 02215
| | - Erbin Dai
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Liying Li
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Stephanie Grainger
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
- Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, MA 02215
| | - Elliot L. Chaikof
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
- Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, MA 02215
- Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, GA 30332
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McKleroy W, Lee TH, Atabai K. Always cleave up your mess: targeting collagen degradation to treat tissue fibrosis. Am J Physiol Lung Cell Mol Physiol 2013; 304:L709-21. [PMID: 23564511 PMCID: PMC3680761 DOI: 10.1152/ajplung.00418.2012] [Citation(s) in RCA: 161] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 03/26/2013] [Indexed: 12/23/2022] Open
Abstract
Pulmonary fibrosis is a vexing clinical problem with no proven therapeutic options. In the normal lung there is continuous collagen synthesis and collagen degradation, and these two processes are precisely balanced to maintain normal tissue architecture. With lung injury there is an increase in the rate of both collagen production and collagen degradation. The increase in collagen degradation is critical in preventing the formation of permanent scar tissue each time the lung is exposed to injury. In pulmonary fibrosis, collagen degradation does not keep pace with collagen production, resulting in extracellular accumulation of fibrillar collagen. Collagen degradation occurs through both extracellular and intracellular pathways. The extracellular pathway involves cleavage of collagen fibrils by proteolytic enzyme including the metalloproteinases. The less-well-described intracellular pathway involves binding and uptake of collagen fragments by fibroblasts and macrophages for lysosomal degradation. The relationship between these two pathways and their relevance to the development of fibrosis is complex. Fibrosis in the lung, liver, and skin has been associated with an impaired degradative environment. Much of the current scientific effort in fibrosis is focused on understanding the pathways that regulate increased collagen production. However, recent reports suggest an important role for collagen turnover and degradation in regulating the severity of tissue fibrosis. The objective of this review is to evaluate the roles of the extracellular and intracellular collagen degradation pathways in the development of fibrosis and to examine whether pulmonary fibrosis can be viewed as a disease of impaired matrix degradation rather than a disease of increased matrix production.
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Affiliation(s)
- William McKleroy
- Cardiovascular Research Institute, Lung Biology Center, University of California San Francisco, San Francisco, CA 94158, USA
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Brito V, Mellal K, Portelance SG, Pérez A, Soto Y, deBlois D, Ong H, Marleau S, Vázquez AM. Induction of anti-anti-idiotype antibodies against sulfated glycosaminoglycans reduces atherosclerosis in apolipoprotein E-deficient mice. Arterioscler Thromb Vasc Biol 2012; 32:2847-54. [PMID: 23087361 DOI: 10.1161/atvbaha.112.300444] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
OBJECTIVE The pathogenesis of atherosclerosis is associated with the early retention of low-density lipoproteins that are trapped in the extracellular matrix of the arterial intima by interaction with glycosaminoglycan side chains of proteoglycans. Mutant mouse/human chimeric antibodies of the murine monoclonal antibody P3, which react with N-glycolyl-containing gangliosides and sulfated glycosaminoglycans, were tested for their potentially antiatherogenic properties through the induction of an idiotypic antibody network that may specifically interfere with the binding of low-density lipoproteins to proteoglycan side chains, low-density lipoprotein modification, and foam cell formation. METHODS AND RESULTS Apolipoprotein E-deficient mice fed a high-fat, high-cholesterol diet received 5 to 6 doses of chP3R99 or chP3S98 mutant antibodies, showing high and low reactivity, respectively, against their respective antigens. Both chimeric antibodies elicited an immunodominant anti-idiotypic response in the absence of adjuvant. A striking (40%-43%) reduction (P<0.01) in total lesion areas was observed in 18-week-old mice immunized with chP3R99, but not chP3S98, compared with PBS-treated mice. The antiatherosclerotic effect was associated with increased mice sera reactivity against heparin and sulfated glycosaminoglycans, including chondroitin and dermatan sulfate. In addition, purified IgG from chP3R99-immunized mice blocked the retention of apolipoprotein B-containing lipoproteins within the arterial wall of apolipoprotein E(-/-) mice. CONCLUSIONS The present study supports use of active immunization and the mounting of an idiotypic antibody network response against glycosaminoglycans as a novel approach to target atherosclerosis.
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Affiliation(s)
- Víctor Brito
- Division of Immunobiology, Center of Molecular Immunology, 216 St and 15th Ave, Siboney, Playa PO Box 16040, Havana 11600, Cuba
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29
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Huang WY, Yeh CL, Lin JH, Yang JS, Ko TH, Lin YH. Development of fibroblast culture in three-dimensional activated carbon fiber-based scaffold for wound healing. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1465-1478. [PMID: 22415364 DOI: 10.1007/s10856-012-4608-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2011] [Accepted: 02/28/2012] [Indexed: 05/31/2023]
Abstract
This work developed a novel bi-layer wound dressing composed of 3D activated carbon fibers that allows facilitates fibroblast cell growth and migration to a wound site for tissue reconstruction, and the gentamicin is incorporated into a poly(γ-glutamic acid)/gelatin membrane to prevent bacterial infection. In an in vitro, field emission scanning electron microscopy shows that rat skin fibroblasts appeared and spread on the surface of activated carbon fibers, and penetrated the interior and exterior of the 3D activated carbon fiber construct to a depth of roughly 200 μm. An in vivo analysis shows that fibroblast cells containing the proposed 3D scaffold had the potential of a biologically functionalized dressing to accelerate wound closure. Additionally, fibroblasts migrated to the wound site in a bi-layer wound dressing containing fibroblasts, enhancing fibronectin and type I collagen expression, resulting in faster skin regeneration than that achieved with a Tegaderm™ hydrocolloid dressing or gauze.
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Affiliation(s)
- Wen-Ying Huang
- Department of Applied Cosmetology and Graduate Institute of Cosmetic Science, Hungkuang University, Taichung, Taiwan
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30
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Chao Y, Makale M, Karmali PP, Sharikov Y, Tsigelny I, Merkulov S, Kesari S, Wrasidlo W, Ruoslahti E, Simberg D. Recognition of dextran-superparamagnetic iron oxide nanoparticle conjugates (Feridex) via macrophage scavenger receptor charged domains. Bioconjug Chem 2012; 23:1003-9. [PMID: 22515422 DOI: 10.1021/bc200685a] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dextran-coated superparamagnetic iron oxide nanoparticles (dextran-SPIO conjugates) offer the attractive possibility of enhancing MRI imaging sensitivity so that small or diffuse lesions can be detected. However, systemically injected SPIOs are rapidly removed by macrophages. We engineered embryonic cells (HEK293T) to express major macrophage scavenger receptor (SR) subtypes including SR-AI, MARCO, and endothelial receptor collectin-12. These SRs possess a positively charged collagen-like (CL) domain and they promoted SPIO uptake, while the charge neutral lipoprotein receptor SR-BI did not. In silico modeling indicated a positive net charge on the CL domain and a net negative charge on the cysteine-rich (CR) domain of MARCO and SR-AI. In vitro experiments revealed that CR domain deletion in SR-AI boosted uptake of SPIO 3-fold, while deletion of MARCO's CR domain abolished this uptake. These data suggest that future studies might productively focus on the validation and further exploration of SR charge fields in SPIO recognition.
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Affiliation(s)
- Ying Chao
- Moores Cancer Center, School of Medicine, ‡Department of Neurosciences, and ⊥San Diego Supercomputer Center, University of California San Diego , La Jolla, California, United States
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31
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Ye X, Hu X, Wang H, Liu J, Zhao Q. Polyelectrolyte multilayer film on decellularized porcine aortic valve can reduce the adhesion of blood cells without affecting the growth of human circulating progenitor cells. Acta Biomater 2012; 8:1057-67. [PMID: 22122977 DOI: 10.1016/j.actbio.2011.11.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 11/05/2011] [Accepted: 11/08/2011] [Indexed: 10/15/2022]
Abstract
Polyelectrolyte multilayer film modification could be an effective method to reduce the immunological and inflammatory response of the xenogeneic scaffold in vivo, and may also be applied to tissue-engineered heart valve in contact with blood. The objectives of this study are to test heparin-chitosan multilayer film as an antithrombotic coating reagent for decellularized aortic heart valve and the biocompatibility of the modified valvular surface. The adhesion and geometric deformation of platelets were demonstrated by scanning electron microscopy. The quantitative assay of platelet activation was determined by measuring the production of soluble P-selectin. Moreover, the leukocytes' adhesion, erythrocyte hemolysis, and whole blood clotting time studies were performed to gain information on the hemocompatibility of this biomaterial. Human-blood-derived endothelial progenitor cells (EPCs) were cultured and the adhesion and growth of EPCs on the surface-modified PDAV were assessed. The results showed that heparin-chitosan multilayer film could be coated on the decellularized valvular scaffolds, and improved their hemocompatibility with respect to a substantial reduction of platelet adhesion and activation. The modified valve also significantly reduced leukocytes adhesion, erythrocyte hemolysis, and whole blood clotting time. Seeding with EPCs achieved a confluent monolayer on the surface of the decellularized matrix. The in vitro studies performed in this work suggest that it may be reasonable to use heparin-chitosan multilayer film as a means of surface modification to improve the blood compatibility of decellularized valvular scaffold.
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Stamov DR, Khoa Nguyen T, Evans HM, Pfohl T, Werner C, Pompe T. The impact of heparin intercalation at specific binding sites in telopeptide-free collagen type I fibrils. Biomaterials 2011; 32:7444-53. [DOI: 10.1016/j.biomaterials.2011.06.031] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2011] [Accepted: 06/13/2011] [Indexed: 11/30/2022]
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33
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Sun Z, Wei Z, Chen J, Wei K. Carbohydrate Coated Polymer Particles: Preparation and Protein-binding Studies. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201190087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Orgel JPRO, San Antonio JD, Antipova O. Molecular and structural mapping of collagen fibril interactions. Connect Tissue Res 2011; 52:2-17. [PMID: 21182410 DOI: 10.3109/03008207.2010.511353] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The fibrous collagens form the structural basis of all mammalian connective tissues, including the vasculature, dermis, bones, tendons, cartilage, and those tissues that support organs such as the heart, kidneys, liver, and lungs. The helical structure of collagen has been extensively studied but in addition to its helical character, its molecular packing arrangement (in its aggregated or fibrillar form) and the presence of specific amino acid sequences govern collagen's in vivo functions. Collagen's molecular packing arrangement helps control cellular communication, attachment and movement, and conveys its tissue-specific biomechanical properties. Recent progress in understanding collagen's molecular packing, fibrillar structure, domain organization, and extracellular matrix (ECM) interactions in light of X-ray fiber diffraction data provides significant new insights into how the ECM is organized and functions. In this review, the hierarchy of fibrillar collagen structure is discussed in the context of how this organization affects ECM-"ligand" interactions, with specific attention to collagenolysis, integrins, fibronection, glycoprotein VI receptor (GPVI), and proteoglycans (PG). Understanding the complex structure of collagen and its attached ligands should provide new insights into tissue growth, development, regeneration, and disease.
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Affiliation(s)
- J P R O Orgel
- Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA.
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35
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Chen J, Chen C, Chen Z, Chen J, Li Q, Huang N. Collagen/heparin coating on titanium surface improves the biocompatibility of titanium applied as a blood-contacting biomaterial. J Biomed Mater Res A 2011; 95:341-9. [PMID: 20623672 DOI: 10.1002/jbm.a.32847] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Thrombosis and restenosis are the main causes leading to failure of cardiovascular and other blood-contacting biomedical devices. It is recognized that rapid re-endothelialization is a promising method for preventing these complications. This article deals with improving the endothelial progenitor cell (EPC) compatibility and hemocompatibility of titanium by coating an extracellular matrix-like film with heparin(hep) and collagen(col) by a layer-by-layer (LBL) self-assembly technique. In the work described here, LBL-produced col/hep coating growth is initialized by deposition of a layer of poly-L-lysine on a titanium surface, which is negatively charged after treatment with NaOH, followed by formation of a multilayer film formed by alternating deposition of negatively charged heparin and positively charged collagen using electrostatic interaction. The X-ray photoelectron spectroscopy results and fluorescence staining of collagen show that collagen is predominant on the surface and that collagen interpenetrates the heparin layer. In vitro EPC attachment and proliferation increase greatly on the col/hep coating. Immunofluorescent staining of cytoskeleton actin reveals that cells on the col/hep coating form a compact confluent cell layer after culture for 3 days. After culture for 5 days, cell viability on the col/hep increases persistently and on titanium the cell viability begins to decrease, showing that the coating possesses the ability to maintain cell viability. Platelet adhesion under dynamic conditions in vitro implies that the hemocompatibility of the col/hep coating is superior to that of titanium. The col/hep coating improves the biocompatibility of titanium and has good potential for application in blood-contacting biomaterials.
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Affiliation(s)
- Jialong Chen
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
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36
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Lin YH, Lin JH, Peng SF, Yeh CL, Chen WC, Chang TL, Liu MJ, Lai CH. Multifunctional gentamicin supplementation of poly(γ-glutamic acid)-based hydrogels for wound dressing application. J Appl Polym Sci 2010. [DOI: 10.1002/app.33249] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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De Cock LJ, De Koker S, De Vos F, Vervaet C, Remon JP, De Geest BG. Layer-by-Layer Incorporation of Growth Factors in Decellularized Aortic Heart Valve Leaflets. Biomacromolecules 2010; 11:1002-8. [DOI: 10.1021/bm9014649] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Liesbeth J. De Cock
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium, Department of Molecular Biomedical Research, Ghent University, Technologiepark Zwijnaarde 927, 9052 Ghent, Belgium, and Laboratory of Radiopharmacy, Department of Pharmaceutical Analysis, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Stefaan De Koker
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium, Department of Molecular Biomedical Research, Ghent University, Technologiepark Zwijnaarde 927, 9052 Ghent, Belgium, and Laboratory of Radiopharmacy, Department of Pharmaceutical Analysis, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Filip De Vos
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium, Department of Molecular Biomedical Research, Ghent University, Technologiepark Zwijnaarde 927, 9052 Ghent, Belgium, and Laboratory of Radiopharmacy, Department of Pharmaceutical Analysis, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Chris Vervaet
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium, Department of Molecular Biomedical Research, Ghent University, Technologiepark Zwijnaarde 927, 9052 Ghent, Belgium, and Laboratory of Radiopharmacy, Department of Pharmaceutical Analysis, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Jean-Paul Remon
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium, Department of Molecular Biomedical Research, Ghent University, Technologiepark Zwijnaarde 927, 9052 Ghent, Belgium, and Laboratory of Radiopharmacy, Department of Pharmaceutical Analysis, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Bruno G. De Geest
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium, Department of Molecular Biomedical Research, Ghent University, Technologiepark Zwijnaarde 927, 9052 Ghent, Belgium, and Laboratory of Radiopharmacy, Department of Pharmaceutical Analysis, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
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Osterholm C, Barczyk MM, Busse M, Grønning M, Reed RK, Kusche-Gullberg M. Mutation in the heparan sulfate biosynthesis enzyme EXT1 influences growth factor signaling and fibroblast interactions with the extracellular matrix. J Biol Chem 2009; 284:34935-43. [PMID: 19850926 DOI: 10.1074/jbc.m109.005264] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Heparan sulfate (HS) chains bind and modulate the signaling efficiency of many ligands, including members of the fibroblast growth factor (FGF) and platelet-derived growth factor families. We previously reported the structure of HS synthesized by embryonic fibroblasts from mice with a gene trap mutation of Ext1 that encodes a glycosyltransferase involved in HS chain elongation. The gene trap mutation results in low expression of Ext1, and, as a consequence, HS chain length is substantially reduced. In the present study, Ext1 mutant and wild-type mouse embryonic fibroblasts were analyzed for the functional consequences of the Ext1 mutation for growth factor signaling and interaction with the extracellular matrix. Here, we show that the phosphorylation of ERK1/2 in response to FGF2 stimulation was markedly decreased in the Ext1 mutant fibroblasts, whereas neither PDGF-BB nor FGF10 signaling was significantly affected. Furthermore, Ext1 mutants displayed reduced ability to attach to collagen I and to contract collagen lattices, even though no differences in the expression of collagen-binding integrins were observed. Reintroduction of Ext1in the Ext1 mutant fibroblasts rescued HS chain length, FGF2 signaling, and the ability of the fibroblasts to contract collagen. These data suggest that the length of the HS chains is a critical determinant of HS-protein interactions and emphasize the essential role of EXT1 in providing specific binding sites for growth factors and extracellular matrix proteins.
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Affiliation(s)
- Cecilia Osterholm
- Department of Biomedicine, University of Bergen, NO-5009 Bergen, Norway
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Tristan A, Benito Y, Montserret R, Boisset S, Dusserre E, Penin F, Ruggiero F, Etienne J, Lortat-Jacob H, Lina G, Bowden MG, Vandenesch F. The signal peptide of Staphylococcus aureus panton valentine leukocidin LukS component mediates increased adhesion to heparan sulfates. PLoS One 2009; 4:e5042. [PMID: 19347045 PMCID: PMC2661369 DOI: 10.1371/journal.pone.0005042] [Citation(s) in RCA: 21] [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: 09/04/2008] [Accepted: 03/02/2009] [Indexed: 11/18/2022] Open
Abstract
Staphylococcus aureus necrotizing pneumonia is a severe disease caused by S. aureus strains carrying the Panton Valentine leukocidin (PVL) genes (lukS-PV & lukF-PV) encoded on various bacteriophages (such as phiSLT). Clinical PVL+ strains isolated from necrotizing pneumonia display an increased attachment to matrix molecules (type I and IV collagens and laminin), a phenotype that could play a role in bacterial adhesion to damaged airway epithelium during the early stages of necrotizing pneumonia (J Infect Dis 2004; 190: 1506–15). To investigate the basis of the observed adhesion of S. aureus PVL+ strains, we compared the ability of PVL+ and their isogenic PVL− strains to attach to various immobilized matrix molecules. The expression of recombinant fragments of the PVL subunits and the addition of synthetic peptides indicated that the processed LukS-PV signal peptide (LukS-PV SP) was sufficient to significantly enhance the ability of S. aureus to attach to extracellular matrix (ECM) components. Furthermore, we showed that adhesion to ECM components was inhibited by heparin and heparan sulfates (HS) suggesting that in vivo, HS could function as a molecular bridge between the matrix and S. aureus expressing the LukS-PV signal peptide. Site directed mutagenesis, biochemical and structural analyses of the LukS-PV signal peptide indicate that this peptide is present at the S. aureus surface, binds to HS in solid phase assay, and mediates the enhanced S. aureus matrix component adhesion. Our data suggests that after its cleavage by signal peptidase, the signal peptide is released from the membrane and associates to the cell wall through its unique C-terminus sequence, while its highly positively charged N-terminus is exposed on the bacterial surface, allowing its interaction with extracellular matrix-associated HS. This mechanism may provide a molecular bridge that enhances the attachment of the S. aureus PVL+ strains to ECM components exposed at damaged epithelial sites.
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Affiliation(s)
- Anne Tristan
- Université Lyon 1, Faculté Laennec, Lyon, France.
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Extracellular matrix binding mixed micelles for drug delivery applications. J Control Release 2009; 137:146-51. [PMID: 19332089 DOI: 10.1016/j.jconrel.2009.03.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Revised: 03/20/2009] [Accepted: 03/22/2009] [Indexed: 11/20/2022]
Abstract
We present the formation of collagen-binding mixed micelles and their potential suitability to deliver therapeutic drugs to the vessel wall. We modified poly(ethylene oxide)-bl-poly(propylene oxide)-bl-poly(ethylene oxide) (Pluronic F-127) to display sulfate groups on the terminus of the PEO block to act as a heparin mimics and bind to collagen in the extracellular matrix. This functionalized macroamphiphile was incorporated into a mixed micelle with poly(propylene sulfide)-bl-poly(ethylene oxide), a macroamphiphile that demonstrates improved micellar stability relative to Pluronic F-127 micelles. The mixed micelles were examined using analytical ultracentrifugation, dynamic light scattering, transmission electron microscopy, and measures of the critical micellar concentration using surface tensiometry. Encapsulation and in vitro release of Sirolimus, an immunosuppressant drug of interest in coronary artery treatment, was considered as an example. Mixed micelles with the sulfate functionality demonstrated enhanced binding to collagen I coated surfaces, suggestive of the potential for binding to the extracellular milieu.
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41
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Reigle KL, Di Lullo G, Turner KR, Last JA, Chervoneva I, Birk DE, Funderburgh JL, Elrod E, Germann MW, Surber C, Sanderson RD, San Antonio JD. Non-enzymatic glycation of type I collagen diminishes collagen-proteoglycan binding and weakens cell adhesion. J Cell Biochem 2008; 104:1684-98. [PMID: 18348167 DOI: 10.1002/jcb.21735] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Non-enzymatic glycation of type I collagen occurs in aging and diabetes, and may affect collagen solubility, charge, polymerization, and intermolecular interactions. Proteoglycans(1) (PGs) bind type I collagen and are proposed to regulate fibril assembly, function, and cell-collagen interactions. Moreover, on the collagen fibril a keratan sulfate (KS) PG binding region overlaps with preferred collagen glycation sites. Thus, we examined the effect of collagen modified by simple glycation on PG-collagen interactions. By affinity coelectrophoresis (ACE), we found reduced affinities of heparin and KSPGs for glycated but not normal collagen, whereas the dermatan sulfate (DS)PGs decorin and biglycan bound similarly to both, and that the affinity of heparin for normal collagen decreased with increasing pH. Circular dichroism (CD) spectroscopy revealed normal and glycated collagens to assume triple helical conformations, but heparin addition caused precipitation and decreased triple helical content-effects that were more marked with glycated collagen. A spectrophotometric assay revealed slower polymerization of glycated collagen. However, ultrastructural analyses indicated that fibrils assembled from normal and glycated collagen exhibited normal periodicity, and had similar structures and comparable diameter distributions. B-cells expressing the cell surface heparan sulfate PG syndecan-1 adhered well to normal but not glycated collagen, and endothelial cell migration was delayed on glycated collagen. We speculate that glycation diminishes the electrostatic interactions between type I collagen and PGs, and may interfere with core protein-collagen associations for KSPGs but not DSPGs. Therefore in vivo, collagen glycation may weaken PG-collagen interactions, thereby disrupting matrix integrity and cell-collagen interactions, adhesion, and migration.
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Affiliation(s)
- Kristin L Reigle
- Department of Medicine, Cardeza Foundation for Hematologic Research, Thomas Jefferson University, Philadelphia, Pennsylvania 19107-5099, USA
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42
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Sweeney SM, Orgel JP, Fertala A, McAuliffe JD, Turner KR, Di Lullo GA, Chen S, Antipova O, Perumal S, Ala-Kokko L, Forlino A, Cabral WA, Barnes AM, Marini JC, Antonio JDS. Candidate cell and matrix interaction domains on the collagen fibril, the predominant protein of vertebrates. J Biol Chem 2008; 283:21187-97. [PMID: 18487200 PMCID: PMC2475701 DOI: 10.1074/jbc.m709319200] [Citation(s) in RCA: 200] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Revised: 04/11/2008] [Indexed: 11/06/2022] Open
Abstract
Type I collagen, the predominant protein of vertebrates, polymerizes with type III and V collagens and non-collagenous molecules into large cable-like fibrils, yet how the fibril interacts with cells and other binding partners remains poorly understood. To help reveal insights into the collagen structure-function relationship, a data base was assembled including hundreds of type I collagen ligand binding sites and mutations on a two-dimensional model of the fibril. Visual examination of the distribution of functional sites, and statistical analysis of mutation distributions on the fibril suggest it is organized into two domains. The "cell interaction domain" is proposed to regulate dynamic aspects of collagen biology, including integrin-mediated cell interactions and fibril remodeling. The "matrix interaction domain" may assume a structural role, mediating collagen cross-linking, proteoglycan interactions, and tissue mineralization. Molecular modeling was used to superimpose the positions of functional sites and mutations from the two-dimensional fibril map onto a three-dimensional x-ray diffraction structure of the collagen microfibril in situ, indicating the existence of domains in the native fibril. Sequence searches revealed that major fibril domain elements are conserved in type I collagens through evolution and in the type II/XI collagen fibril predominant in cartilage. Moreover, the fibril domain model provides potential insights into the genotype-phenotype relationship for several classes of human connective tissue diseases, mechanisms of integrin clustering by fibrils, the polarity of fibril assembly, heterotypic fibril function, and connective tissue pathology in diabetes and aging.
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Affiliation(s)
- Shawn M. Sweeney
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Joseph P. Orgel
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Andrzej Fertala
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Jon D. McAuliffe
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Kevin R. Turner
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Gloria A. Di Lullo
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Steven Chen
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Olga Antipova
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Shiamalee Perumal
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Leena Ala-Kokko
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Antonella Forlino
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Wayne A. Cabral
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Aileen M. Barnes
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - Joan C. Marini
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
| | - James D. San Antonio
- Cardiovascular Institute, University
of Pennsylvania, Philadelphia, Pennsylvania 19104, the
Center for Synchrotron Radiation Research
and Instrumentation, Department of Biological, Chemical, and Physical
Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, the
Department of Dermatology and Cutaneous
Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, the
Department of Statistics, Wharton School,
University of Pennsylvania, Philadelphia 19104, Pennsylvania, the
Chicago Medical School, North Chicago,
Illinois 60064, the Collagen Research
Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology,
University of Oulu, Oulu, Finland,
Connective Tissue Gene Tests, Allentown,
Pennsylvania 18103, the Department of
Biochemistry A. Castellani, University of Pavia, Pavia, Italy, the
Bone and Extracellular Matrix Branch,
Eunice Kennedy Shriver National Institute of Child Health and Human
Development, National Institutes of Health, Bethesda, Maryland 20892, and the
Cardeza Foundation for Hematologic
Research and Department of Medicine, Thomas Jefferson University,
Philadelphia, Pennsylvania 19107
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43
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Stamov D, Grimmer M, Salchert K, Pompe T, Werner C. Heparin intercalation into reconstituted collagen I fibrils: Impact on growth kinetics and morphology. Biomaterials 2008; 29:1-14. [PMID: 17892897 DOI: 10.1016/j.biomaterials.2007.09.009] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Accepted: 09/04/2007] [Indexed: 11/16/2022]
Abstract
Collagen type I fibrils, reconstituted in vitro in the presence of heparin, exhibit an unusually thick and straight shape. A detailed structural analysis by scanning force and scanning electron microscopy revealed a non-linear dependence in size distribution, width-to-length ratio, and morphology over a wide range of glycosaminoglycan (GAG) concentrations. By varying molecular weight, degree of sulphation, charge, and concentration of different GAGs we are able to correlate the morphological data with kinetic turbidimetric measurements, and quantitation of fibril-bound GAG. The experiments imply a pronounced impact of the prenucleation phase on the cofibril morphology as a result of the strong electrostatic interaction of heparin with tropocollagen. Heparin is assumed to stabilize the collagen microfibrils and to enhance their parallel accretion during cofibrillogenesis with preservation of the typical asymmetric collagen banding pattern. The heparin quantitation data show heparin to be intercalated as a linker molecule with one specific binding site inside the cofibrils. The reconstituted cofibrils with their unusual morphology and GAG intercalation-a phenomenon not reported in vivo-can be expected to exhibit interesting mechanical and biochemical behaviours as a biomaterial for extracellular matrix scaffolds.
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Affiliation(s)
- Dimitar Stamov
- Leibniz Institute of Polymer Research Dresden, Max Bergmann Center of Biomaterials Dresden, Hohe Strasse 6, Dresden, Germany
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44
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Marini JC, Forlino A, Cabral WA, Barnes AM, San Antonio JD, Milgrom S, Hyland JC, Körkkö J, Prockop DJ, De Paepe A, Coucke P, Symoens S, Glorieux FH, Roughley PJ, Lund AM, Kuurila-Svahn K, Hartikka H, Cohn DH, Krakow D, Mottes M, Schwarze U, Chen D, Yang K, Kuslich C, Troendle J, Dalgleish R, Byers PH. Consortium for osteogenesis imperfecta mutations in the helical domain of type I collagen: regions rich in lethal mutations align with collagen binding sites for integrins and proteoglycans. Hum Mutat 2007; 28:209-21. [PMID: 17078022 PMCID: PMC4144349 DOI: 10.1002/humu.20429] [Citation(s) in RCA: 526] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Osteogenesis imperfecta (OI) is a generalized disorder of connective tissue characterized by fragile bones and easy susceptibility to fracture. Most cases of OI are caused by mutations in type I collagen. We have identified and assembled structural mutations in type I collagen genes (COL1A1 and COL1A2, encoding the proalpha1(I) and proalpha2(I) chains, respectively) that result in OI. Quantitative defects causing type I OI were not included. Of these 832 independent mutations, 682 result in substitution for glycine residues in the triple helical domain of the encoded protein and 150 alter splice sites. Distinct genotype-phenotype relationships emerge for each chain. One-third of the mutations that result in glycine substitutions in alpha1(I) are lethal, especially when the substituting residues are charged or have a branched side chain. Substitutions in the first 200 residues are nonlethal and have variable outcome thereafter, unrelated to folding or helix stability domains. Two exclusively lethal regions (helix positions 691-823 and 910-964) align with major ligand binding regions (MLBRs), suggesting crucial interactions of collagen monomers or fibrils with integrins, matrix metalloproteinases (MMPs), fibronectin, and cartilage oligomeric matrix protein (COMP). Mutations in COL1A2 are predominantly nonlethal (80%). Lethal substitutions are located in eight regularly spaced clusters along the chain, supporting a regional model. The lethal regions align with proteoglycan binding sites along the fibril, suggesting a role in fibril-matrix interactions. Recurrences at the same site in alpha2(I) are generally concordant for outcome, unlike alpha1(I). Splice site mutations comprise 20% of helical mutations identified in OI patients, and may lead to exon skipping, intron inclusion, or the activation of cryptic splice sites. Splice site mutations in COL1A1 are rarely lethal; they often lead to frameshifts and the mild type I phenotype. In alpha2(I), lethal exon skipping events are located in the carboxyl half of the chain. Our data on genotype-phenotype relationships indicate that the two collagen chains play very different roles in matrix integrity and that phenotype depends on intracellular and extracellular events.
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Affiliation(s)
- Joan C Marini
- Bone and Extracellular Matrix Branch, National Institute of Child Health and Human Development, NIH, Bethesda, Maryland 20892, USA.
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45
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Abstract
Currently there is an intense effort being made to elucidate the factors that control stem and progenitor cell fate. Developments in our understanding of the FGF/FGFR pathway and its role as an effector of stem cell pluripotency have heightened expectations that a therapeutic use for stem cells will move from a possibility to a probability. Mounting evidence is revealing the molecular mechanisms by which fibroblast growth factor (FGF) signaling, together with a large number of other growth and adhesive factors, is controlled by the extracellular sugar, heparan sulfate (HS). What has resulted is a novel means of augmenting and thus regulating the growth factor control of stem and progenitor cell fate. Here, we review the numerous bioactivities of HS, and the development of strategies to implement HS-induced control of cell fate decisions.
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Affiliation(s)
- Simon M Cool
- Laboratory of Stem Cells and Tissue Repair, Institute of Molecular and Cell Biology, Proteos, 61 Biopolis Drive, Singapore 138673.
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46
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Mitsi M, Hong Z, Costello CE, Nugent MA. Heparin-mediated conformational changes in fibronectin expose vascular endothelial growth factor binding sites. Biochemistry 2006; 45:10319-28. [PMID: 16922507 DOI: 10.1021/bi060974p] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Regulation of angiogenesis involves interactions between vascular endothelial growth factor (VEGF) and components of the extracellular matrix, including fibronectin and heparan sulfate. In the present study, we identified two classes of VEGF binding sites on fibronectin. One was constitutively available whereas the availability of the other was modulated by the conformational state of fibronectin. Atomic force microscopy studies revealed that heparin and hydrophilic substrates promoted the extended conformation of fibronectin, leading to increased VEGF binding. The ability of heparin to enhance VEGF binding to fibronectin was dependent on the chemical composition and chain length of heparin, since long (>22 saccharides) heparin chains with sulfation on the 6-O and N positions of glucosamine units were required for full activity. Treatment of the complex endothelial extracellular matrix with heparin also increased VEGF binding, suggesting that heparin/heparan sulfate might regulate VEGF interactions within the extracellular matrix by controlling the structure and organization of fibronectin matrices.
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Affiliation(s)
- Maria Mitsi
- Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts 02118, USA
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47
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Ricard-Blum S, Beraud M, Raynal N, Farndale RW, Ruggiero F. Structural Requirements for Heparin/Heparan Sulfate Binding to Type V Collagen. J Biol Chem 2006; 281:25195-204. [PMID: 16815843 DOI: 10.1074/jbc.m603096200] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Collagen-proteoglycan interactions participate in the regulation of matrix assembly and in cell-matrix interactions. We reported previously that a fragment (Ile824-Pro950) of the collagen alpha1(V) chain, HepV, binds to heparin via a cluster of three major basic residues, Arg912, Arg918, and Arg921, and two additional residues, Lys905 and Arg909 (Delacoux, F., Fichard, A., Cogne, S., Garrone, R., and Ruggiero, F. (2000) J. Biol. Chem. 275, 29377-29382). Here, we further characterized the binding of HepV and collagen V to heparin and heparan sulfate by surface plasmon resonance assays. HepV bound to heparin and heparan sulfate with a similar affinity (KD approximately 18 and 36 nM, respectively) in a cation-dependent manner, and 2-O-sulfation of heparin was shown to be crucial for the binding. An octasaccharide of heparin and a decasaccharide of heparan sulfate were required for HepV binding. Studies with HepV mutants showed that the same basic residues were involved in the binding to heparin, to heparan sulfate, and to the cell surface. The contribution of Lys905 and Arg909 was found to be significant. The triple-helical peptide GPC(GPP)5G904-R918(GPP)5GPC-NH2 and native collagen V molecules formed much more stable complexes with heparin than HepV, and collagen V bound to heparin/heparan sulfate with a higher affinity (in the nanomolar range) than HepV. Heat and chemical denaturation strongly decreased the binding, indicating that the triple helix plays a major role in stabilizing the interaction with heparin. Collagen V and HepV may play different roles in cell-matrix interactions and in matrix assembly or remodeling mediated by their specific interactions with heparan sulfate.
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Affiliation(s)
- Sylvie Ricard-Blum
- Institut de Biologie et Chimie des Protéines, UMR CNRS 5086, Université Claude Bernard Lyon 1, Institut Féderatif de Recherche 128 BioSciences Gerland, 7 Passage du Vercors, 69367 Lyon Cedex 07, Lyon, France
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48
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Modulating Extracellular Matrix at Interfaces of Polymeric Materials. POLYMERS FOR REGENERATIVE MEDICINE 2006. [DOI: 10.1007/12_089] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Sanderson RD, Yang Y, Kelly T, MacLeod V, Dai Y, Theus A. Enzymatic remodeling of heparan sulfate proteoglycans within the tumor microenvironment: growth regulation and the prospect of new cancer therapies. J Cell Biochem 2006; 96:897-905. [PMID: 16149080 DOI: 10.1002/jcb.20602] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Heparan sulfate proteoglycans (HSPGs), via their interactions with numerous effector molecules such as FGF-2, IL-8, and VEGF, regulate the biological activity of cells by acting as co-receptors that promote signaling. The extent and nature of their role as co-receptors is often misregulated in cancer as manifested by alterations in HSPG structure and expression level. This misregulation of HSPGs can aid in promoting the malignant phenotype. In addition to expression-related changes in HSPGs, recent discoveries indicate that HSPGs localized within the tumor microenvironment can be attacked by enzymes that alter proteoglycan structure resulting in dramatic effects on tumor growth and metastasis. This review focuses on remodeling of HSPGs by three distinct mechanisms that occur in vivo; (i) shedding of proteoglycan extracellular domains from cell surfaces, (ii) fragmentation of heparan sulfate chains by heparanase, and (iii) removal of sulfates from the 6-O position of heparan sulfate chains by extracellular sulfatases. Assessing or monitoring the remodeling of HSPGs has important implications for tumor diagnosis and patient prognosis while therapeutic manipulation of the remodeling process represents an exciting new possibility for treating cancer.
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Affiliation(s)
- Ralph D Sanderson
- Department of Pathology and the Arkansas Cancer Research Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA.
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Wang H, Fertala A, Ratner BD, Sage EH, Jiang S. Identifying the SPARC Binding Sites on Collagen I and Procollagen I by Atomic Force Microscopy. Anal Chem 2005; 77:6765-71. [PMID: 16255572 DOI: 10.1021/ac051349d] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
SPARC (secreted protein acidic and rich in cysteine) is a matricellular protein associated with the extracellular matrix (ECM). It has been found that the production of collagen I is a requisite for the association of SPARC with ECM, and studies with SPARC-null mice indicate that SPARC plays a role in modifying the structure of collagen fibers. It is not known, however, whether SPARC interacts with the collagen I precursor, procollagen I. In this study, the binding of SPARC to collagen I and procollagen I was verified by surface plasmon resonance. The SPARC-binding sites on collagen I and procollagen I were identified by directly visualizing their complexes using tapping-mode atomic force microscopy (TM-AFM). The characteristic chain end feature in collagen I is not readily detected by AFM, so unambiguous location of the binding sites relative to the C- or N-termini is difficult. In contrast, procollagen I, with its large globular C-propeptide, permits easy identification of the C-terminus. Histograms were constructed and compared based on the distances of the bound SPARC to the C-terminus of procollagen I and to the closest end of collagen I. There is a broad distribution of SPARC binding sites on procollagen I with the most preferred binding region located approximately 1/3 from the C-terminus. Characterization of the SPARC-binding sites on collagen I and procollagen I provides useful information for further understanding of the functional implications of their interactions.
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Affiliation(s)
- Hua Wang
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, USA
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