101
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Fields M, Spencer N, Dudhia J, McMillan PF. Structural changes in cartilage and collagen studied by high temperature Raman spectroscopy. Biopolymers 2017; 107. [DOI: 10.1002/bip.23017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/16/2017] [Accepted: 02/16/2017] [Indexed: 02/02/2023]
Affiliation(s)
- Mark Fields
- Department of Chemistry; University College London; 20 Gordon Street London WC1H 0AJ United Kingdom
| | - Nicholas Spencer
- WestCHEM, School of Chemistry, Joseph Black Building; University of Glasgow; Glasgow G12 9QQ United Kingdom
| | - Jayesh Dudhia
- Department of Clinical Sciences and Services; The Royal Veterinary College; Hawkshead Lane, North Mymms, Hatfield Herts AL9 7TA United Kingdom
| | - Paul F. McMillan
- Department of Chemistry; University College London; 20 Gordon Street London WC1H 0AJ United Kingdom
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102
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Trudel G, Melkus G, Cron GO, Louati H, Sheikh A, Larson PE, Schweitzer M, Lapner P, Uhthoff HK, Laneuville O. Imaging of the rabbit supraspinatus enthesis at 7 Tesla: a 4-week time course after repair surgery and effect of channeling. J Magn Reson Imaging 2017; 46:461-467. [DOI: 10.1002/jmri.25589] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 11/25/2016] [Indexed: 12/21/2022] Open
Affiliation(s)
- Guy Trudel
- Bone and Joint Research Laboratory, Department of Medicine, Division of Psychiatry; University of Ottawa; Ottawa ON Canada
- The Ottawa Hospital Rehabilitation Center and Ottawa Hospital Research Institute; Ottawa ON Canada
| | - Gerd Melkus
- Department of Radiology; The Ottawa Hospital; Ottawa ON Canada
| | - Greg O. Cron
- Department of Radiology; The Ottawa Hospital; Ottawa ON Canada
| | - Hakim Louati
- Department of Surgery Division of Orthopaedic Surgery; The Ottawa Hospital; Ottawa ON Canada
| | - Adnan Sheikh
- Department of Radiology; The Ottawa Hospital; Ottawa ON Canada
| | - Peder E.Z. Larson
- Department of Radiology; University of California at San Francisco; San Francisco California USA
| | - Mark Schweitzer
- Department of Radiology; Stony Brook University NY; New York New York USA
| | - Peter Lapner
- Department of Surgery Division of Orthopaedic Surgery; The Ottawa Hospital; Ottawa ON Canada
| | - Hans K. Uhthoff
- Bone and Joint Research Laboratory, Department of Medicine, Division of Psychiatry; University of Ottawa; Ottawa ON Canada
| | - Odette Laneuville
- Bone and Joint Research Laboratory, Department of Medicine, Division of Psychiatry; University of Ottawa; Ottawa ON Canada
- Department of Biology; University of Ottawa; Ottawa ON Canada
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103
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Sandor M, Leamy P, Assan P, Hoonjan A, Huang LT, Edwards M, Zuo W, Li H, Xu H. Relevant In Vitro Predictors of Human Acellular Dermal Matrix-Associated Inflammation and Capsule Formation in a Nonhuman Primate Subcutaneous Tissue Expander Model. EPLASTY 2017; 17:e1. [PMID: 28119764 PMCID: PMC5223281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective: Benchtop methods were evaluated for preclinical inflammation/capsule formation correlation following implantation of human acellular dermal matrices. Methods: Dermal matrices were compared with native dermis for structure (histology, scanning electron microscopy), collagen solubility (hydroxyproline), enzymatic susceptibility (collagenase), and thermal stability (differential scanning calorimetry). Results were compared with implantation outcomes in a primate tissue expander model. Results: Native dermis, electron beam-sterilized, and freeze-dried human acellular dermal matrices had equivalent morphology, acid-soluble collagen (60.5% ± 6.3%, 65.3% ± 3.2%, and 63.3% ± 2.4%, respectively), and collagenase resistance. Implant results showed minimal inflammation/matrix degradation, lack of capsule formation, insignificant elastic modulus change (57.65 ± 20.24 MPa out-of-package/44.84 ± 23.87 MPa in vivo), and low antibody induction (2- to 8-fold increase) for electron beam-sterilized matrix. Similar results for freeze-dried dermal matrix were previously observed. γ-Irradiated, γ-irradiated/freeze-dried, and ethanol-stored dermal matrices were statistically different from native dermis for acid-soluble collagen (82.4% ± 5.8%, 72.2% ± 6.2%, and 76.8% ± 5.0%, respectively) and collagenase digestion rate, indicating matrix damage. γ-Irradiated matrix-implanted animals demonstrated elevated inflammatory response, foreign body giant cells, capsule formation at the tissue expander junction, and robust matrix metalloproteinase-1 staining with significant elastic modulus decrease (37.43 ± 7.52 MPa out-of-package/19.58 ± 1.16 MPa in vivo). Antibody increase (32- to 128-fold) was observed 6 to 10 weeks following γ-irradiated matrix implantation. Ethanol-stored dermal matrix elicited an acute antibody response (4- to 128-fold increase, 2-4 weeks) and macrophage-concentrated synovial-like hyperplasia at the tissue expander junction, moderate matrix metalloproteinase-1 staining, and significant elastic modulus decrease (61.15 ± 9.12 MPa out-of-package/17.92 ± 4.02 MPa in vivo) by 10 weeks implantation. Conclusion: Demonstrated loss of collagen integrity in vitro may be predictive of inflammation/capsule formation in primate tissue expander models. These results may be further predictive of clinical observations.
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Affiliation(s)
- Maryellen Sandor
- LifeCell Corporation, an ACELITY Company, Bridgewater, NJ,Correspondence:
| | - Patrick Leamy
- LifeCell Corporation, an ACELITY Company, Bridgewater, NJ
| | - Pearl Assan
- LifeCell Corporation, an ACELITY Company, Bridgewater, NJ
| | | | - Li-Ting Huang
- LifeCell Corporation, an ACELITY Company, Bridgewater, NJ
| | | | - Wenqi Zuo
- LifeCell Corporation, an ACELITY Company, Bridgewater, NJ
| | - Hui Li
- LifeCell Corporation, an ACELITY Company, Bridgewater, NJ
| | - Hui Xu
- LifeCell Corporation, an ACELITY Company, Bridgewater, NJ
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104
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Abstract
Fibrillar collagens (types I, II, III, V, XI, XXIV and XXVII) constitute a sub-group within the collagen family (of which there are 28 types in humans) whose functions are to provide three-dimensional frameworks for tissues and organs. These networks confer mechanical strength as well as signalling and organizing functions through binding to cellular receptors and other components of the extracellular matrix (ECM). Here we describe the structure and assembly of fibrillar collagens, and their procollagen precursors, from the molecular to the tissue level. We show how the structure of the collagen triple-helix is influenced by the amino acid sequence, hydrogen bonding and post-translational modifications, such as prolyl 4-hydroxylation. The numerous steps in the biosynthesis of the fibrillar collagens are reviewed with particular attention to the role of prolyl 3-hydroxylation, collagen chaperones, trimerization of procollagen chains and proteolytic maturation. The multiple steps controlling fibril assembly are then discussed with a focus on the cellular control of this process in vivo. Our current understanding of the molecular packing in collagen fibrils, from different tissues, is then summarized on the basis of data from X-ray diffraction and electron microscopy. These results provide structural insights into how collagen fibrils interact with cell receptors, other fibrillar and non-fibrillar collagens and other ECM components, as well as enzymes involved in cross-linking and degradation.
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Affiliation(s)
- Jordi Bella
- Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester, M13 9PT, UK.
| | - David J S Hulmes
- Tissue Biology and Therapeutic Engineering Unit (UMR5305), CNRS/Université Claude Bernard Lyon 1, Lyon, France
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105
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Mikhailov OV. Molecular structure design and soft template synthesis of aza-, oxaaza- and thiaazamacrocyclic metal chelates in the gelatin matrix. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2016.10.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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106
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Singh RS, Kaur N, Rana V, Kennedy JF. Recent insights on applications of pullulan in tissue engineering. Carbohydr Polym 2016; 153:455-462. [DOI: 10.1016/j.carbpol.2016.07.118] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 07/29/2016] [Accepted: 07/29/2016] [Indexed: 12/20/2022]
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107
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Supramolecular Organization of Collagen Fibrils in Healthy and Osteoarthritic Human Knee and Hip Joint Cartilage. PLoS One 2016; 11:e0163552. [PMID: 27780246 PMCID: PMC5079628 DOI: 10.1371/journal.pone.0163552] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 09/11/2016] [Indexed: 01/13/2023] Open
Abstract
Cartilage matrix is a composite of discrete, but interacting suprastructures, i.e. cartilage fibers with microfibrillar or network-like aggregates and penetrating extrafibrillar proteoglycan matrix. The biomechanical function of the proteoglycan matrix and the collagen fibers are to absorb compressive and tensional loads, respectively. Here, we are focusing on the suprastructural organization of collagen fibrils and the degradation process of their hierarchical organized fiber architecture studied at high resolution at the authentic location within cartilage. We present electron micrographs of the collagenous cores of such fibers obtained by an improved protocol for scanning electron microscopy (SEM). Articular cartilages are permeated by small prototypic fibrils with a homogeneous diameter of 18 ± 5 nm that can align in their D-periodic pattern and merge into larger fibers by lateral association. Interestingly, these fibers have tissue-specific organizations in cartilage. They are twisted ropes in superficial regions of knee joints or assemble into parallel aligned cable-like structures in deeper regions of knee joint- or throughout hip joints articular cartilage. These novel observations contribute to an improved understanding of collagen fiber biogenesis, function, and homeostasis in hyaline cartilage.
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108
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Hsiao HC, Santos A, Howell DW, Patterson JL, Fuchs-Young RS, Bondos SE. Culture of Tumorigenic Cells on Protein Fibers Reveals Metastatic Cell Behaviors. Biomacromolecules 2016; 17:3790-3799. [DOI: 10.1021/acs.biomac.6b01311] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Hao-Ching Hsiao
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - Andres Santos
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - David W. Howell
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - Jan L. Patterson
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - Robin S.L. Fuchs-Young
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - Sarah E. Bondos
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
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109
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Chaitow L. New evidence of a dynamic fascial maintenance and self-repair process. J Bodyw Mov Ther 2016; 20:701-703. [DOI: 10.1016/j.jbmt.2016.08.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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110
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Solomonov I, Zehorai E, Talmi-Frank D, Wolf SG, Shainskaya A, Zhuravlev A, Kartvelishvily E, Visse R, Levin Y, Kampf N, Jaitin DA, David E, Amit I, Nagase H, Sagi I. Distinct biological events generated by ECM proteolysis by two homologous collagenases. Proc Natl Acad Sci U S A 2016; 113:10884-9. [PMID: 27630193 PMCID: PMC5047162 DOI: 10.1073/pnas.1519676113] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
It is well established that the expression profiles of multiple and possibly redundant matrix-remodeling proteases (e.g., collagenases) differ strongly in health, disease, and development. Although enzymatic redundancy might be inferred from their close similarity in structure, their in vivo activity can lead to extremely diverse tissue-remodeling outcomes. We observed that proteolysis of collagen-rich natural extracellular matrix (ECM), performed uniquely by individual homologous proteases, leads to distinct events that eventually affect overall ECM morphology, viscoelastic properties, and molecular composition. We revealed striking differences in the motility and signaling patterns, morphology, and gene-expression profiles of cells interacting with natural collagen-rich ECM degraded by different collagenases. Thus, in contrast to previous notions, matrix-remodeling systems are not redundant and give rise to precise ECM-cell crosstalk. Because ECM proteolysis is an abundant biochemical process that is critical for tissue homoeostasis, these results improve our fundamental understanding its complexity and its impact on cell behavior.
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Affiliation(s)
- Inna Solomonov
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Eldar Zehorai
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Dalit Talmi-Frank
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Immunology, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Sharon G Wolf
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Alla Shainskaya
- Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Alina Zhuravlev
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Elena Kartvelishvily
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Robert Visse
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Yishai Levin
- Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Nir Kampf
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
| | | | - Eyal David
- Department of Immunology, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ido Amit
- Department of Immunology, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Hideaki Nagase
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Irit Sagi
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 76100, Israel;
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111
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Cross-linked dry bonding: A new etch-and-rinse technique. Dent Mater 2016; 32:1124-32. [PMID: 27431091 DOI: 10.1016/j.dental.2016.06.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 03/16/2016] [Accepted: 06/22/2016] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To determine if acid-etched, cross-linked dentin can be dehydrated without lowering bond strength below that of cross-linked wet-bonded dentin in vitro. METHODS Using extracted human third molars, control acid-etched dentin was bonded with Single Bond Plus, using either the wet- or dry-bonding technique. Experimental acid-etched dentin was treated with 5mass% grape seed extract (GSE) in different solvents for 1min before undergoing wet vs dry resin-dentin bonding with Single Bond Plus. Completely demineralized dentin beams were treated with 5% GSE for 0, 1 or 10min, before measuring stiffness by 3-point flexure. Other completely demineralized beams were treated similarly and then incubated in buffer for 1 week to measure the collagen solubilization by endogenous dentin proteases. RESULTS 24h microtensile bond strengths (μTBS) in wet and dry controls were 53.5±3.6 and 9.4±1.8MPa, respectively (p<0.05). 5% GSE in water gave μTBS of 53.7±3.4 and 39.1±9.7MPa (p<0.05), respectively, while 5% GSE in ethanol gave μTBS of 51.2±2.3 and 35.3±2.0MPa (p<0.05). 5% GSE in 5% EtOH/95% water gave wet and dry μTBS of 53.0±2.3 and 55.7±5.1MPa (p>0.05). Cross-linking demineralized dentin with 5% GSE increased stiffness of dentin and decreased collagen degradation (p<0.05). SIGNIFICANCE 5% GSE pretreatment of acid-etched dentin for 1min permits the dentin to be completely air-dried without lowering bond strength.
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112
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Internal strain drives spontaneous periodic buckling in collagen and regulates remodeling. Proc Natl Acad Sci U S A 2016; 113:8436-41. [PMID: 27402741 DOI: 10.1073/pnas.1523228113] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Fibrillar collagen, an essential structural component of the extracellular matrix, is remarkably resistant to proteolysis, requiring specialized matrix metalloproteinases (MMPs) to initiate its remodeling. In the context of native fibrils, remodeling is poorly understood; MMPs have limited access to cleavage sites and are inhibited by tension on the fibril. Here, single-molecule recordings of fluorescently labeled MMPs reveal cleavage-vulnerable binding regions arrayed periodically at ∼1-µm intervals along collagen fibrils. Binding regions remain periodic even as they migrate on the fibril, indicating a collective process of thermally activated and self-healing defect formation. An internal strain relief model involving reversible structural rearrangements quantitatively reproduces the observed spatial patterning and fluctuations of defects and provides a mechanism for tension-dependent stabilization of fibrillar collagen. This work identifies internal-strain-driven defects that may have general and widespread regulatory functions in self-assembled biological filaments.
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113
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Watanabe-Nakayama T, Itami M, Kodera N, Ando T, Konno H. High-speed atomic force microscopy reveals strongly polarized movement of clostridial collagenase along collagen fibrils. Sci Rep 2016; 6:28975. [PMID: 27373458 PMCID: PMC4931465 DOI: 10.1038/srep28975] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 06/08/2016] [Indexed: 01/03/2023] Open
Abstract
Bacterial collagenases involved in donor infection are widely applied in many fields due to their high activity and specificity; however, little is known regarding the mechanisms by which bacterial collagenases degrade insoluble collagen in host tissues. Using high-speed atomic force microscopy, we simultaneously visualized the hierarchical structure of collagen fibrils and the movement of a representative bacterial collagenase, Clostridium histolyticum type I collagenase (ColG), to determine the relationship between collagen structure and collagenase movement. Notably, ColG moved ~14.5 nm toward the collagen N terminus in ~3.8 s in a manner dependent on a catalytic zinc ion. While ColG was engaged, collagen molecules were not only degraded but also occasionally rearranged to thicken neighboring collagen fibrils. Importantly, we found a similarity of relationship between the enzyme-substrate interface structure and enzyme migration in collagen-collagenase and DNA-nuclease systems, which share a helical substrate structure, suggesting a common strategy in enzyme evolution.
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Affiliation(s)
- Takahiro Watanabe-Nakayama
- Imaging Research Division, Bio-AFM Frontier Research Center, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Masahiro Itami
- Imaging Research Division, Bio-AFM Frontier Research Center, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Noriyuki Kodera
- Imaging Research Division, Bio-AFM Frontier Research Center, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Toshio Ando
- Imaging Research Division, Bio-AFM Frontier Research Center, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Hiroki Konno
- Imaging Research Division, Bio-AFM Frontier Research Center, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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114
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Tiku ML, Madhan B. Preserving the longevity of long-lived type II collagen and its implication for cartilage therapeutics. Ageing Res Rev 2016; 28:62-71. [PMID: 27133944 DOI: 10.1016/j.arr.2016.04.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 04/26/2016] [Indexed: 11/30/2022]
Abstract
Human life expectancy has been steadily increasing at a rapid rate, but this increasing life span also brings about increases in diseases, dementia, and disability. A global burden of disease 2010 study revealed that hip and knee osteoarthritis ranked the 11th highest in terms of years lived with disability. Wear and tear can greatly influence the quality of life during ageing. In particular, wear and tear of the articular cartilage have adverse effects on joints and result in osteoarthritis. The articular cartilage uses longevity of type II collagen as the foundation around which turnover of proteoglycans and the homeostatic activity of chondrocytes play central roles thereby maintaining the function of articular cartilage in the ageing. The longevity of type II collagen involves a complex interaction of the scaffolding needs of the cartilage and its biochemical, structural and mechanical characteristics. The covalent cross-linking of heterotypic polymers of collagens type II, type IX and type XI hold together cartilage, allowing it to withstand ageing stresses. Discerning the biological clues in the armamentarium for preserving cartilage appears to be collagen cross-linking. Therapeutic methods to crosslink in in-vivo are non-existent. However intra-articular injections of polyphenols in vivo stabilize the cartilage and make it resistant to degradation, opening a new therapeutic possibility for prevention and intervention of cartilage degradation in osteoarthritis of aging.
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Affiliation(s)
- Moti L Tiku
- Rutgers, Robert Wood Johnson Medical School, New Brunswick, NJ, USA.
| | - Balaraman Madhan
- Council of Scientific and Industrial Research - Central Leather Research Institute, Adyar, Chennai, Tamil Nadu, India
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115
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Subramanian SR, Singam ERA, Berinski M, Subramanian V, Wade RC. Identification of an Electrostatic Ruler Motif for Sequence-Specific Binding of Collagenase to Collagen. J Phys Chem B 2016; 120:8580-9. [PMID: 27245212 DOI: 10.1021/acs.jpcb.6b02573] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Sequence-specific cleavage of collagen by mammalian collagenase plays a pivotal role in cell function. Collagenases are matrix metalloproteinases that cleave the peptide bond at a specific position on fibrillar collagen. The collagenase Hemopexin-like (HPX) domain has been proposed to be responsible for substrate recognition, but the mechanism by which collagenases identify the cleavage site on fibrillar collagen is not clearly understood. In this study, Brownian dynamics simulations coupled with atomic-detail and coarse-grained molecular dynamics simulations were performed to dock matrix metalloproteinase-1 (MMP-1) on a collagen IIIα1 triple helical peptide. We find that the HPX domain recognizes the collagen triple helix at a conserved R-X11-R motif C-terminal to the cleavage site to which the HPX domain of collagen is guided electrostatically. The binding of the HPX domain between the two arginine residues is energetically stabilized by hydrophobic contacts with collagen. From the simulations and analysis of the sequences and structural flexibility of collagen and collagenase, a mechanistic scheme by which MMP-1 can recognize and bind collagen for proteolysis is proposed.
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Affiliation(s)
- Sundar Raman Subramanian
- Molecular and Cellular Modeling Group, Heidelberg Institute for Theoretical Studies , Schloss-Wolfsbrunnenweg 35, 69117 Heidelberg, Germany.,Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Chennai, India
| | - Ettayapuram Ramaprasad Azhagiya Singam
- Molecular and Cellular Modeling Group, Heidelberg Institute for Theoretical Studies , Schloss-Wolfsbrunnenweg 35, 69117 Heidelberg, Germany.,Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Chennai, India
| | - Michael Berinski
- Molecular and Cellular Modeling Group, Heidelberg Institute for Theoretical Studies , Schloss-Wolfsbrunnenweg 35, 69117 Heidelberg, Germany.,Edinburgh Genomics, The University of Edinburgh , Edinburgh, Scotland
| | - Venkatesan Subramanian
- Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Chennai, India
| | - Rebecca C Wade
- Molecular and Cellular Modeling Group, Heidelberg Institute for Theoretical Studies , Schloss-Wolfsbrunnenweg 35, 69117 Heidelberg, Germany.,Zentrum für Molekulare Biologie der Universität Heidelberg , Heidelberg, Germany.,Interdisciplinary Center for Scientific Computing (IWR), Heidelberg University , Heidelberg, Germany
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116
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Deshmukh SN, Dive AM, Moharil R, Munde P. Enigmatic insight into collagen. J Oral Maxillofac Pathol 2016; 20:276-83. [PMID: 27601823 PMCID: PMC4989561 DOI: 10.4103/0973-029x.185932] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 06/06/2016] [Indexed: 11/26/2022] Open
Abstract
Collagen is a unique, triple helical molecule which forms the major part of extracellular matrix. It is the most abundant protein in the human body, representing 30% of its dry weight. It is the fibrous structural protein that makes up the white fibers (collagen fibers) of skin, tendons, bones, cartilage and all other connective tissues. Collagens are not only essential for the mechanical resistance and resilience of multicellular organisms, but are also signaling molecules defining cellular shape and behavior. The human body has at least 16 types of collagen, but the most prominent types are I, II and III. Collagens are produced by several cell types and are distinguishable by their molecular compositions, morphologic characteristics, distribution, functions and pathogenesis. This is the major fibrous glycoprotein present in the extracellular matrix and in connective tissue and helps in maintaining the structural integrity of these tissues. It has a triple helical structure. Various studies have proved that mutations that modify folding of the triple helix result in identifiable genetic disorders. Collagen diseases share certain similarities with autoimmune diseases, because autoantibodies specific to each collagen disease are produced. Therefore, this review highlights the role of collagen in normal health and also the disorders associated with structural and functional defects in collagen.
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Affiliation(s)
- Shrutal Narendra Deshmukh
- Department of Oral and Maxillofacial Pathology, Dr. RRK Dental College and Research Centre, Akola, Maharashtra, India
| | - Alka M Dive
- Department of Oral and Maxillofacial Pathology, VSPM'S DCRC, Nagpur, Maharashtra, India
| | - Rohit Moharil
- Department of Oral and Maxillofacial Pathology, VSPM'S DCRC, Nagpur, Maharashtra, India
| | - Prashant Munde
- Department of Oral and Maxillofacial Pathology, VSPM'S DCRC, Nagpur, Maharashtra, India
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117
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Collagen cross-linkers on dentin bonding: Stability of the adhesive interfaces, degree of conversion of the adhesive, cytotoxicity and in situ MMP inhibition. Dent Mater 2016; 32:732-41. [PMID: 27087688 DOI: 10.1016/j.dental.2016.03.008] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 09/16/2015] [Accepted: 03/15/2016] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To investigate the effect of collagen cross-links on the stability of adhesive properties, the degree of conversion within the hybrid layer, cytotoxicity and the inhibition potential of the MMPs' activity. METHODS The dentin surfaces of human molars were acid-etched and treated with primers containing: 6.5wt% proanthocyanidin, UVA-activated 0.1wt% riboflavin, 5wt% glutaraldehyde and distilled water for 60s. Following, dentin was bonded with Adper Single Bond Plus and Tetric N-Bond; and restored with resin composite. The samples were sectioned into resin-dentin "sticks" and tested for microtensile bond strength (μTBS) after immediate (IM) and 18-month (18M) periods. Bonded sticks at each period were used to evaluate nanoleakage and the degree of conversion (DC) under micro-Raman spectroscopy. The enzimatic activity (P1L10 cross-linkers, P1L22 MMPs' activities) in the hybrid layer was evaluated under confocal microscopy. The culture cell (NIH 3T3 fibroblast cell line) and MTT assay were performed to transdentinal cytotoxicity evaluation. Data from all tests were submitted to appropriate statistical analysis (α=0.05). RESULTS All cross-linking primers reduced the degradation of μTBS compared with the control group after 18M (p>0.05). The DC was not affected (p>0.213). The NL increased after 18M for all experimental groups, except for proanthocyanidin with Single Bond Plus (p>0.05). All of the cross-link agents reduced the MMPs' activity, although this inhibition was more pronounced by PA. The cytotoxicity assay revealed reduced cell viability only for glutaraldehyde (p<0.001). SIGNIFICANCE Cross-linking primers used in clinically relevant minimized the time degradation of the μTBS without jeopardizing the adhesive polymerization, as well as reduced the collagenolytic activity of MMPs. Glutaraldeyde reduced cell viability significantly and should be avoided for clinical use.
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118
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Turco G, Frassetto A, Fontanive L, Mazzoni A, Cadenaro M, Di Lenarda R, Tay FR, Pashley DH, Breschi L. Occlusal loading and cross-linking effects on dentin collagen degradation in physiological conditions. Dent Mater 2016; 32:192-9. [DOI: 10.1016/j.dental.2015.11.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 10/18/2015] [Accepted: 11/30/2015] [Indexed: 11/25/2022]
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Kamalov M, Kaur H, Brimble MA. Intermolecular Peptide Cross-Linking by Using Diaminodicarboxylic Acids. Chemistry 2016; 22:3622-31. [DOI: 10.1002/chem.201503458] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Meder Kamalov
- Institute of Biological Chemistry; Faculty of Chemistry; Währinger Straße 38 1090 Vienna Austria
| | - Harveen Kaur
- School of Chemical Sciences; The University of Auckland; 23 Symonds St. Auckland 1142 New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences; The University of Auckland; 23 Symonds St. Auckland 1142 New Zealand
- School of Biological Sciences; The University of Auckland; 3 Symonds St. Auckland 1142 New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; The University of Auckland; 3 Symonds St. Auckland 1142 New Zealand
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120
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Zhu S, Gu Z, Xiong S, An Y, Liu Y, Yin T, You J, Hu Y. Fabrication of a novel bio-inspired collagen–polydopamine hydrogel and insights into the formation mechanism for biomedical applications. RSC Adv 2016. [DOI: 10.1039/c6ra12306f] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel bio-inspired hydrogel with good biological property and initiative adhesive ability to cells has been fabricated via collagen self-assembly and the incorporation of PDA, which provides a significant potential in biomedical applications.
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Affiliation(s)
- Shichen Zhu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province
| | - Zhipeng Gu
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Shanbai Xiong
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province
| | - Yueqi An
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
| | - Youming Liu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
| | - Tao Yin
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
| | - Juan You
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
| | - Yang Hu
- College of Food Science and Technology and MOE Key Laboratory of Environment Correlative Dietology
- Huazhong Agricultural University
- Wuhan 430070
- P. R. China
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province
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Characterization of irreversible physio-mechanical processes in stretched fetal membranes. Acta Biomater 2016; 30:299-310. [PMID: 26577989 DOI: 10.1016/j.actbio.2015.11.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 10/25/2015] [Accepted: 11/08/2015] [Indexed: 02/07/2023]
Abstract
We perform bulge tests on live fetal membrane (FM) tissues that simulate the mechanical conditions prior to contractions. Experimental results reveal an irreversible mechanical behavior that appears during loading and is significantly different than the mechanical behavior that appears during unloading or in subsequent loading cycles. The irreversible behavior results in a residual strain that does not recover upon unloading and remains the same for at least 1h after the FM is unloaded. Surprisingly, the irreversible behavior demonstrates a linear stress-strain relation. We introduce a new model for the mechanical response of collagen tissues, which accounts for the irreversible deformation and provides predictions in agreement with our experimental results. The basic assumption of the model is that the constitutive stress-strain relationship of individual elements that compose the collagen fibers has a plateau segment during which an irreversible transformation/deformation occurs. Fittings of calculated and measured stress-strain curves reveal a well-defined single-value property of collagenous tissues, which is related to the threshold strain εth for irreversible transformation. Further discussion of several physio-mechanical processes that can induce irreversible behavior indicate that the most probable process, which is in agreement with our results for εth, is a phase transformation of collagen molecules from an α-helix to a β-sheet structure. A phase transformation is a manifestation of a significant change in the molecular structure of the collagen tissues that can alter connections with surrounding molecules and may lead to critical biological changes, e.g., an initiation of labor. STATEMENT OF SIGNIFICANCE This study is driven by the hypothesis that pre-contraction mechanical stretch of the fetal membrane (FM) can lead to a change in the microstructure of the FM, which in turn induces a critical biological (hormonal) change that leads to the initiation of labor. We present mechanical characterizations of live FM tissues that reveal a significant irreversible process and a new model for the mechanical response of collagen tissues, which accounts for this process. Fittings of calculated and measured results reveal a well-defined single-value property of collagenous tissues, which is related to the threshold strain for irreversible transformation. Further discussion indicates that the irreversible deformation is induced by a phase transformation of collagen molecules that can lead to critical biological changes.
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Singh P, Nagpal R, Singh UP, Manuja N. Effect of carbodiimide on the structural stability of resin/dentin interface. J Conserv Dent 2016; 19:501-509. [PMID: 27994309 PMCID: PMC5146763 DOI: 10.4103/0972-0707.194020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Clinical longevity of composite resin restorations is a significant problem in adhesive dentistry. Most of the current simplified adhesives present good immediate bonding, but the bond strength gradually falls over a period due to biodegradation at the resin-dentin interface. Various strategies have been proposed to improve the durability of resin-dentin bond including the use of matrix metalloproteinases inhibitors and collagen cross-linkers, biomimetic remineralization, ethanol wet bonding, to improve the physical and mechanical properties of the bonding substrate, i.e., dentin. However, all are under preliminary research and without any conclusive evidence. Therefore, this paper addresses the current challenge in dental adhesion, i.e., poor durability of resin-dentin bond and introduces the concept of dentin biomodification as an alternative way for improving the long-term bonding effectiveness of current adhesives to dentin and also provides an overview of a synthetic collagen cross-linking agent carbodiimide (EDC) including its mechanism of action, literature review of studies evaluating EDC, variables associated with its use and its cytotoxicity. Search was performed across the electronic databases (PubMed, Ebsco host, and Google search engine) to identify manuscripts for inclusion, using the keywords: carbodiimide, dentin bonding, durability, resin-dentin interface, and collagen cross-linking. Thirty-five articles were finally included, and the last search was made in February 2016.
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Affiliation(s)
- Payal Singh
- Department of Conservative Dentistry and Endodontics, Kothiwal Dental College, Moradabad, Uttar Pradesh, India
| | - Rajni Nagpal
- Department of Conservative Dentistry and Endodontics, Kothiwal Dental College, Moradabad, Uttar Pradesh, India
| | - Udai Pratap Singh
- Department of Conservative Dentistry and Endodontics, Kothiwal Dental College, Moradabad, Uttar Pradesh, India
| | - Naveen Manuja
- Department of Pediatric Dentistry, Kothiwal Dental College, Moradabad, Uttar Pradesh, India
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Domene C, Jorgensen C, Abbasi SW. A perspective on structural and computational work on collagen. Phys Chem Chem Phys 2016; 18:24802-24811. [DOI: 10.1039/c6cp03403a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Collagen is the single most abundant protein in the extracellular matrix in the animal kingdom, with remarkable structural and functional diversity and regarded one of the most useful biomaterials.
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Affiliation(s)
- Carmen Domene
- Department of Chemistry
- King's College London
- UK
- Chemistry Research Laboratory
- University of Oxford
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124
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Qin Z, Robichaud P, Quan T. Oxidative stress and CCN1 protein in human skin connective tissue aging. AIMS MOLECULAR SCIENCE 2016. [DOI: 10.3934/molsci.2016.2.269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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125
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Howes JM, Pugh N, Knäuper V, Farndale RW. Modified platelet deposition on matrix metalloproteinase 13 digested collagen I. J Thromb Haemost 2015; 13:2253-9. [PMID: 26447617 PMCID: PMC4855633 DOI: 10.1111/jth.13166] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 09/23/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Atherothrombosis underlies acute coronary syndromes, including unstable angina and acute myocardial infarction. Within the unstable plaque, monocytes express collagenolytic matrix metalloproteinases (MMPs), including MMP-13, which degrades fibrous collagen. Following rupture, vessel wall components including degraded collagen are exposed to circulating platelets. Platelet receptors then mediate the recruitment and activation of platelets to form a thrombus, blocking blood flow and resulting in myocardial infarction and sudden death. OBJECTIVES Here we aim to provide information on the effects of collagen degradation on platelet adhesion and thrombus formation. METHODS Using increasing concentrations of MMP-13, we induced progressive degradation of fibrous and monomeric collagen I, visualized by electrophoresis, and then investigated the capacity of the resulting fragments to support static platelet adhesion and thrombus formation in whole flowing blood. RESULTS Both integrin and glycoprotein VI-dependent interactions with fibrous collagen underpin high levels of platelet adhesion under both conditions, with little obvious effect of MMP-13 treatment. Static platelet adhesion to monomeric collagen was strongly α2β1-dependent regardless of degradation status. Under flow conditions, partially degraded monomeric collagen supported increased thrombus deposition at 10 μg mL(-1) MMP-13, falling close to background when collagen degradation was complete (100 μg mL(-1) MMP-13). CONCLUSIONS New binding activities come into play after partial digestion of collagen monomers, and net platelet-reactivity through all axes is abolished as degradation becomes more complete.
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Affiliation(s)
- J-M Howes
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - N Pugh
- Department of Biomedical and Forensic Science, Anglia Ruskin University, Cambridge, UK
| | - V Knäuper
- Cardiff University Dental School, Cardiff, UK
| | - R W Farndale
- Department of Biochemistry, University of Cambridge, Cambridge, UK
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Zhou Q, Kühn PT, Huisman T, Nieboer E, van Zwol C, van Kooten TG, van Rijn P. Directional nanotopographic gradients: a high-throughput screening platform for cell contact guidance. Sci Rep 2015; 5:16240. [PMID: 26572879 PMCID: PMC4647116 DOI: 10.1038/srep16240] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/12/2015] [Indexed: 01/26/2023] Open
Abstract
A novel approach was developed using PDMS-substrates with surface-aligned nanotopography gradients, varying unidirectional in amplitude and wavelength, for studying cell behavior with regard to adhesion and alignment. The gradients target more surface feature parameters simultaneously and provide more information with fewer experiments and are therefore vastly superior with respect to individual topography substrates. Cellular adhesion experiments on non-gradient aligned nanowrinkled surfaces displayed a linear relationship of osteoblast cell adhesion with respect to topography aspect ratio. Additionally, an aspect ratio of 0.25 was found to be most efficient for cell alignment. Modification of the surface preparation method allowed us to develop an approach for creating surface nanotopography gradients which innovatively provided a superior data collection with fewer experiments showing that 1) low amplitude with small wavenumber is best for osteoblast cell adhesion 2) indeed higher aspect ratios are favorable for alignment however only with features between 80-180 nm in amplitude and 450-750 nm in wavelength with a clear transition between adhesion and alignment efficiency and 3) disproved a linear relationship of cell adhesion towards aspect ratio as was found for single feature substrate analysis.
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Affiliation(s)
- Qihui Zhou
- Biomedical Engineering Department-FB40, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
- W.J. Kolff Institute for Biomedical Engineering and Materials Science-FB41, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, Netherlands
| | - Philipp T. Kühn
- Biomedical Engineering Department-FB40, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
- W.J. Kolff Institute for Biomedical Engineering and Materials Science-FB41, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, Netherlands
| | - Thirsa Huisman
- Biomedical Engineering Department-FB40, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Elsje Nieboer
- Biomedical Engineering Department-FB40, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Charlotte van Zwol
- Biomedical Engineering Department-FB40, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Theo G. van Kooten
- Biomedical Engineering Department-FB40, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
- W.J. Kolff Institute for Biomedical Engineering and Materials Science-FB41, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, Netherlands
| | - Patrick van Rijn
- Biomedical Engineering Department-FB40, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
- W.J. Kolff Institute for Biomedical Engineering and Materials Science-FB41, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, Netherlands
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands
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DELGADO CC, SCHEFFEL DLS, SCHEFFEL RH, PASHLEY D, HEBLING J. Redução da atividade proteolítica da dentina após curtos períodos de aplicação de proantocianidina. REVISTA DE ODONTOLOGIA DA UNESP 2015. [DOI: 10.1590/1807-2577.02115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ResumoIntroduçãoAgentes promotores de ligações cruzadas têm sido investigados como inibidores da atividade enzimática da dentina, o que favoreceria a longevidade das restaurações adesivas.ObjetivoAvaliar o efeito do tratamento da dentina com proantocianidina (PA), em curtos períodos de tempo, na inibição da atividade de MMPs in situ.Material e métodoQuarenta espécimes de dentina (1×1×6 mm) foram obtidos de molares hígidos e divididos em quatro grupos (n=10). Os espécimes foram condicionados com ácido fosfórico por 15 s, seguido de lavagem em água deionizada. A dentina condicionada foi tratada com: água, 5% PA por 5 s, 15 s ou 30 s. A atividade de MMP foi analisada colorimetricamente (SensoLyte®) e os dados de absorbância (412 nm) foram submetidos aos testes de ANOVA e Tukey (α=0,05).ResultadoTodos os períodos de tratamento foram capazes de reduzir a atividade de MMPs, sendo que os melhores resultados foram observados para a dentina tratada com PA por 15 s (63,1% redução) e 30 s (70,2%). O tratamento por 5 s foi capaz de inibir 39,9% das MMPs.ConclusãoA aplicação de PA sobre a dentina condicionada foi capaz de reduzir a atividade de MMPs mesmo em períodos de tempo extremamente curtos, como 5 s. No entanto, melhores resultados foram obtidos com os maiores períodos de tratamento.
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128
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Chien YC, Burwell AK, Saeki K, Fernandez-Martinez A, Pugach MK, Nonomura G, Habelitz S, Ho SP, Rapozo-Hilo M, Featherstone JD, Marshall SJ, Marshall GW. Distinct decalcification process of dentin by different cariogenic organic acids: Kinetics, ultrastructure and mechanical properties. Arch Oral Biol 2015; 63:93-105. [PMID: 26745819 DOI: 10.1016/j.archoralbio.2015.10.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Revised: 07/15/2015] [Accepted: 10/01/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVES We studied artificial dentin lesions in human teeth generated by lactate and acetate buffers (pH 5.0), the two most abundant acids in caries. The objective of this study was to determine differences in mechanical properties, mineral density profiles and ultrastructural variations of two different artificial lesions with the same approximate depth. METHODS 0.05M (pH 5.0) acetate or lactate buffer was used to create 1) 180μm-deep lesions in non-carious human dentin blocks (acetate 130h; lactate 14days); (2) demineralized, ∼180μm-thick non-carious dentin discs (3 weeks). We performed nanoindentation to determine mechanical properties across the hydrated lesions, and micro X-ray computed tomography (MicroXCT) to determine mineral profiles. Ultrastructure in lesions was analyzed by TEM/selected area electron diffraction (SAED). Demineralized dentin discs were analyzed by small angle X-ray scattering (SAXS). RESULTS Diffusion-dominated demineralization was shown based on the linearity between lesion depths versus the square root of exposure time in either solution, with faster kinetics in acetate buffer. Nanoindentation revealed lactate induced a significantly sharper transition in reduced elastic modulus across the lesions. MicroXCT showed lactate demineralized lesions had swelling and more disorganized matrix structure, whereas acetate lesions had abrupt X-ray absorption near the margin. At the ultrastructural level, TEM showed lactate was more effective in removing minerals from the collagenous matrix, which was confirmed by SAXS analysis. CONCLUSIONS These findings indicated the different acids yielded lesions with different characteristics that could influence lesion formation resulting in their distinct predominance in different caries activities, and these differences may impact strategies for dentin caries remineralization.
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Affiliation(s)
- Y-C Chien
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US; Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, US
| | - A K Burwell
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - K Saeki
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - A Fernandez-Martinez
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, US; ISTerre, CNRS & University of Grenoble, B.P. 53X, Grenoble, Cedex 9, 38041, France
| | - M K Pugach
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - G Nonomura
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - S Habelitz
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - S P Ho
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - M Rapozo-Hilo
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - J D Featherstone
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - S J Marshall
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US
| | - G W Marshall
- Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA 94143-0758, US.
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129
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Tezvergil-Mutluay A, Pashley D, Mutluay MM. Long-Term Durability of Dental Adhesives. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s40496-015-0070-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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130
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Barczyk M, Bolstad AI, Gullberg D. Role of integrins in the periodontal ligament: organizers and facilitators. Periodontol 2000 2015; 63:29-47. [PMID: 23931052 PMCID: PMC3791550 DOI: 10.1111/prd.12027] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/01/2012] [Indexed: 12/21/2022]
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131
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A membrane-type-1 matrix metalloproteinase (MT1-MMP)-discoidin domain receptor 1 axis regulates collagen-induced apoptosis in breast cancer cells. PLoS One 2015; 10:e0116006. [PMID: 25774665 PMCID: PMC4638154 DOI: 10.1371/journal.pone.0116006] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 12/03/2014] [Indexed: 11/19/2022] Open
Abstract
During tumour dissemination, invading breast carcinoma cells become confronted with a reactive stroma, a type I collagen-rich environment endowed with anti-proliferative and pro-apoptotic properties. To develop metastatic capabilities, tumour cells must acquire the capacity to cope with this novel microenvironment. How cells interact with and respond to their microenvironment during cancer dissemination remains poorly understood. To address the impact of type I collagen on the fate of tumour cells, human breast carcinoma MCF-7 cells were cultured within three-dimensional type I collagen gels (3D COL1). Using this experimental model, we have previously demonstrated that membrane type-1 matrix metalloproteinase (MT1-MMP), a proteinase overexpressed in many aggressive tumours, promotes tumour progression by circumventing the collagen-induced up-regulation of BIK, a pro-apoptotic tumour suppressor, and hence apoptosis. Here we performed a transcriptomic analysis to decipher the molecular mechanisms regulating 3D COL1-induced apoptosis in human breast cancer cells. Control and MT1-MMP expressing MCF-7 cells were cultured on two-dimensional plastic plates or within 3D COL1 and a global transcriptional time-course analysis was performed. Shifting the cells from plastic plates to 3D COL1 activated a complex reprogramming of genes implicated in various biological processes. Bioinformatic analysis revealed a 3D COL1-mediated alteration of key cellular functions including apoptosis, cell proliferation, RNA processing and cytoskeleton remodelling. By using a panel of pharmacological inhibitors, we identified discoidin domain receptor 1 (DDR1), a receptor tyrosine kinase specifically activated by collagen, as the initiator of 3D COL1-induced apoptosis. Our data support the concept that MT1-MMP contributes to the inactivation of the DDR1-BIK signalling axis through the cleavage of collagen fibres and/or the alteration of DDR1 receptor signalling unit, without triggering a drastic remodelling of the transcriptome of MCF-7 cells.
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132
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Tjäderhane L, Buzalaf MAR, Carrilho M, Chaussain C. Matrix metalloproteinases and other matrix proteinases in relation to cariology: the era of 'dentin degradomics'. Caries Res 2015; 49:193-208. [PMID: 25661522 DOI: 10.1159/000363582] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Accepted: 05/07/2014] [Indexed: 11/19/2022] Open
Abstract
Dentin organic matrix, with type I collagen as the main component, is exposed after demineralization in dentinal caries, erosion or acidic conditioning during adhesive composite restorative treatment. This exposed matrix is prone to slow hydrolytic degradation by host collagenolytic enzymes, matrix metalloproteinases (MMPs) and cysteine cathepsins. Here we review the recent findings demonstrating that inhibition of salivary or dentin endogenous collagenolytic enzymes may provide preventive means against progression of caries or erosion, just as they have been shown to retain the integrity and improve the longevity of resin composite filling bonding to dentin. This paper also presents the case that the organic matrix in caries-affected dentin may not be preserved as intact as previously considered. In partially demineralized dentin, MMPs and cysteine cathepsins with the ability to cleave off the terminal non-helical ends of collagen molecules (telopeptides) may lead to the gradual loss of intramolecular gap areas. This would seriously compromise the matrix ability for intrafibrillar remineralization, which is considered essential in restoring the dentin's mechanical properties. More detailed data of the enzymes responsible and their detailed function in dentin-destructive conditions may not only help to find new and better preventive means, but better preservation of demineralized dentin collagenous matrix may also facilitate true biological remineralization for the better restoration of tooth structural and mechanical integrity and mechanical properties.
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Affiliation(s)
- Leo Tjäderhane
- Institute of Dentistry, University of Oulu, Oulu, Finland
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133
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Matrix metalloproteinase interactions with collagen and elastin. Matrix Biol 2015; 44-46:224-31. [PMID: 25599938 PMCID: PMC4466143 DOI: 10.1016/j.matbio.2015.01.005] [Citation(s) in RCA: 241] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 01/10/2015] [Accepted: 01/10/2015] [Indexed: 12/18/2022]
Abstract
Most abundant in the extracellular matrix are collagens, joined by elastin that confers elastic recoil to the lung, aorta, and skin. These fibrils are highly resistant to proteolysis but can succumb to a minority of the matrix metalloproteinases (MMPs). Considerable inroads to understanding how such MMPs move to the susceptible sites in collagen and then unwind the triple helix of collagen monomers have been gained. The essential role in unwinding of the hemopexin-like domain of interstitial collagenases or the collagen binding domain of gelatinases is highlighted. Elastolysis is also facilitated by the collagen binding domain in the cases of MMP-2 and MMP-9, and remote exosites of the catalytic domain in the case of MMP-12.
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134
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Vidal CMP, Leme AA, Aguiar TR, Phansalkar R, Nam JW, Bisson J, McAlpine JB, Chen SN, Pauli GF, Bedran-Russo A. Mimicking the hierarchical functions of dentin collagen cross-links with plant derived phenols and phenolic acids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:14887-93. [PMID: 25379878 PMCID: PMC4437200 DOI: 10.1021/la5034383] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Proanthocyanidins (PACs) are secondary plant metabolites that mediate nonenzymatic collagen cross-linking and enhance the properties of collagen based tissue, such as dentin. The extent and nature of cross-linking is influenced by the composition and specific chemical structure of the bioactive compounds present in certain PAC-rich extracts. This study investigated the effect of the molecular weight and stereochemistry of polyphenol compounds on two important properties of dentin, biomechanics, and biostability. For that, purified phenols, a phenolic acid, and some of its derivatives were selected: PAC dimers (A1, A2, B1, and B2) and a trimer (C1), gallic acid (Ga), its esters methyl-gallate (MGa) and propyl-gallate (PGa), and a pentagalloyl ester of glucose (PGG). Synergism was assessed by combining the most active PAC and gallic acid derivative. Mechanical properties of dentin organic matrix were determined by the modulus of elasticity obtained in a flexural test. Biostability was evaluated by the resistance to collagenase degradation. PACs significantly enhanced dentin mechanical properties and decreased collagen digestion. Among the gallic acid derivatives, only PGG had a significant enhancing effect. The lack of observed C1:PGG synergy indicates that both compounds have similar mechanisms of interaction with the dentin matrix. These findings reveal that the molecular weight of polyphenols have a determinant effect on their interaction with type I collagen and modulates the mechanism of cross-linking at the molecular, intermolecular, and inter-microfibrillar levels.
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Affiliation(s)
- Cristina M. P. Vidal
- Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, 801 South Paulina St, Chicago, IL, 60612, USA
| | - Ariene A. Leme
- Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, 801 South Paulina St, Chicago, IL, 60612, USA
| | - Thaiane R. Aguiar
- Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, 801 South Paulina St, Chicago, IL, 60612, USA
| | - Rasika Phansalkar
- Department of Medicinal Chemistry and Pharmacognosy; College of Pharmacy, University of Illinois at Chicago, 833 South Wood St, Chicago, IL, 60612, USA
| | - Joo-Won Nam
- Department of Medicinal Chemistry and Pharmacognosy; College of Pharmacy, University of Illinois at Chicago, 833 South Wood St, Chicago, IL, 60612, USA
| | - Jonathan Bisson
- Department of Medicinal Chemistry and Pharmacognosy; College of Pharmacy, University of Illinois at Chicago, 833 South Wood St, Chicago, IL, 60612, USA
| | - James B. McAlpine
- Department of Medicinal Chemistry and Pharmacognosy; College of Pharmacy, University of Illinois at Chicago, 833 South Wood St, Chicago, IL, 60612, USA
| | - Shao-Nong Chen
- Department of Medicinal Chemistry and Pharmacognosy; College of Pharmacy, University of Illinois at Chicago, 833 South Wood St, Chicago, IL, 60612, USA
| | - Guido F. Pauli
- Department of Medicinal Chemistry and Pharmacognosy; College of Pharmacy, University of Illinois at Chicago, 833 South Wood St, Chicago, IL, 60612, USA
| | - Ana Bedran-Russo
- Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, 801 South Paulina St, Chicago, IL, 60612, USA
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135
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Aguda AH, Panwar P, Du X, Nguyen NT, Brayer GD, Brömme D. Structural basis of collagen fiber degradation by cathepsin K. Proc Natl Acad Sci U S A 2014; 111:17474-9. [PMID: 25422423 PMCID: PMC4267343 DOI: 10.1073/pnas.1414126111] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Cathepsin K is the major collagenolytic protease in bone that facilitates physiological as well as pathological bone degradation. Despite its key role in bone remodeling and for being a highly sought-after drug target for the treatment of osteoporosis, the mechanism of collagen fiber degradation by cathepsin K remained elusive. Here, we report the structure of a collagenolytically active cathepsin K protein dimer. Cathepsin K is organized into elongated C-shaped protease dimers that reveal a putative collagen-binding interface aided by glycosaminoglycans. Molecular modeling of collagen binding to the dimer indicates the participation of nonactive site amino acid residues, Q21 and Q92, in collagen unfolding. Mutations at these sites as well as perturbation of the dimer protein-protein interface completely inhibit cathepsin-K-mediated fiber degradation without affecting the hydrolysis of gelatin or synthetic peptide. Using scanning electron microscopy, we demonstrate the specific binding of cathepsin K at the edge of the fibrillar gap region of collagen fibers, which suggest initial cleavage events at the N- and C-terminal ends of tropocollagen molecules. Edman degradation analysis of collagen fiber degradation products revealed those initial cleavage sites. We propose that one cathepsin K molecule binds to collagen-bound glycosaminoglycans at the gap region and recruits a second protease molecule that provides an unfolding and cleavage mechanism for triple helical collagen. Removal of collagen-associated glycosaminoglycans prevents cathepsin K binding and subsequently fiber hydrolysis. Cathepsin K dimer and glycosaminoglycan binding sites represent novel targeting sites for the development of nonactive site-directed second-generation inhibitors of this important drug target.
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Affiliation(s)
- Adeleke H Aguda
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, Department of Biochemistry and Molecular Biology, Faculty of Medicine, and
| | - Preety Panwar
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, Department of Biochemistry and Molecular Biology, Faculty of Medicine, and
| | - Xin Du
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, and
| | - Nham T Nguyen
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, and
| | - Gary D Brayer
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, and
| | - Dieter Brömme
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, Department of Biochemistry and Molecular Biology, Faculty of Medicine, and Center for Blood Research, University of British Columbia, Vancouver, BC, Canada V6T 1Z3
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136
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Stamov DR, Stock E, Franz CM, Jähnke T, Haschke H. Imaging collagen type I fibrillogenesis with high spatiotemporal resolution. Ultramicroscopy 2014; 149:86-94. [PMID: 25486377 DOI: 10.1016/j.ultramic.2014.10.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 09/02/2014] [Accepted: 10/07/2014] [Indexed: 10/24/2022]
Abstract
Fibrillar collagens, such as collagen type I, belong to the most abundant extracellular matrix proteins and they have received much attention over the last five decades due to their large interactome, complex hierarchical structure and high mechanical stability. Nevertheless, the collagen self-assembly process is still incompletely understood. Determining the real-time kinetics of collagen type I formation is therefore pivotal for better understanding of collagen type I structure and function, but visualising the dynamic self-assembly process of collagen I on the molecular scale requires imaging techniques offering high spatiotemporal resolution. Fast and high-speed scanning atomic force microscopes (AFM) provide the means to study such processes on the timescale of seconds under near-physiological conditions. In this study we have applied fast AFM tip scanning to study the assembly kinetics of fibrillar collagen type I nanomatrices with a temporal resolution reaching eight seconds for a frame size of 500 nm. By modifying the buffer composition and pH value, the kinetics of collagen fibrillogenesis can be adjusted for optimal analysis by fast AFM scanning. We furthermore show that amplitude-modulation imaging can be successfully applied to extract additional structural information from collagen samples even at high scan rates. Fast AFM scanning with controlled amplitude modulation therefore provides a versatile platform for studying dynamic collagen self-assembly processes at high resolution.
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Affiliation(s)
| | - Erik Stock
- JPK Instruments AG, Bouchéstrasse 12, 12435 Berlin, Germany
| | - Clemens M Franz
- DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1a, 76131 Karlsruhe, Germany
| | - Torsten Jähnke
- JPK Instruments AG, Bouchéstrasse 12, 12435 Berlin, Germany
| | - Heiko Haschke
- JPK Instruments AG, Bouchéstrasse 12, 12435 Berlin, Germany
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137
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Rydell-Törmänen K, Andréasson K, Hesselstrand R, Westergren-Thorsson G. Absence of fibromodulin affects matrix composition, collagen deposition and cell turnover in healthy and fibrotic lung parenchyma. Sci Rep 2014; 4:6383. [PMID: 25230586 PMCID: PMC5377322 DOI: 10.1038/srep06383] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 08/28/2014] [Indexed: 01/31/2023] Open
Abstract
The ECM exerts great effects on cells, and changed composition may therefore have profound impact. Small leucine-rich proteoglycans, e.g. fibromodulin, are essential in collagen assembly. Our aim was to investigate the role of fibromodulin in healthy and fibrotic lung parenchyma, theorizing that fibromodulin-deficient animals would be protected against fibrosis. Repeated subcutaneous bleomycin-injections were given to wild type and fibromodulin-deficient mice, inducing pulmonary fibrosis. Development of fibrosis, ECM composition, cell turnover and inflammatory responses were investigated. Fibromodulin-deficient animals were not protected from fibrosis, but the composition of the matrix was affected, with decreased Collagen I in fibromodulin-deficient animals, both in controls (0.07 ± 0.04% vs. 0.18 ± 0.07% tissue area) and after bleomycin (0.37 ± 0.16% vs. 0.61 ± 0.21% tissue area). Biglycan was increased in fibromodulin-deficient animals, whereas decorin was decreased. Furthermore, bleomycin increased cell turnover in wild type, but only proliferation in fibromodulin-deficient animals, resulting in hyperplasia. In addition, the bleomycin-induced immune response was affected in fibromodulin-deficient animals. We thus conclude that fibromodulin has a profound effect on ECM, both in healthy and fibrotic lung parenchyma, and may be providing a permissive microenvironment affecting cell turnover. Furthermore, this study highlights the need to acknowledge specific ECM components, when assessing tissue properties and ultimately cell behaviour.
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Affiliation(s)
| | | | - Roger Hesselstrand
- Dept. Clinical Sciences, Section of Rheumatology, Lund University, Lund, Sweden
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138
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Barrea RA, Antipova O, Gore D, Heurich R, Vukonich M, Kujala NG, Irving TC, Orgel JPRO. X-ray micro-diffraction studies on biological samples at the BioCAT Beamline 18-ID at the Advanced Photon Source. JOURNAL OF SYNCHROTRON RADIATION 2014; 21:1200-1205. [PMID: 25178013 PMCID: PMC4151685 DOI: 10.1107/s1600577514012259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 05/27/2014] [Indexed: 06/03/2023]
Abstract
The small source sizes of third-generation synchrotron sources are ideal for the production of microbeams for diffraction studies of crystalline and non-crystalline materials. While several such facilities have been available around the world for some time now, few have been optimized for the handling of delicate soft-tissue specimens under cryogenic conditions. Here the development of a new X-ray micro-diffraction instrument at the Biophysics Collaborative Access Team beamline 18-ID at the Advanced Photon Source, and its use with newly developed cryo-diffraction techniques for soft-tissue studies, are described. The combination of the small beam sizes delivered by this instrument, the high delivered flux and successful cryo-freezing of rat-tail tendon has enabled us to record data to better than 4 Å resolution. The ability to quickly raster scan samples in the beam allows selection of ordered regions in fibrous samples for markedly improved data quality. Examples of results of experiments obtainable using this instrument are presented.
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Affiliation(s)
- R. A. Barrea
- The Biophysics Collaborative Access Team (BioCAT), CSRRI and Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - O. Antipova
- The Biophysics Collaborative Access Team (BioCAT), CSRRI and Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - D. Gore
- The Biophysics Collaborative Access Team (BioCAT), CSRRI and Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - R. Heurich
- The Biophysics Collaborative Access Team (BioCAT), CSRRI and Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - M. Vukonich
- The Biophysics Collaborative Access Team (BioCAT), CSRRI and Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - N. G. Kujala
- The Biophysics Collaborative Access Team (BioCAT), CSRRI and Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - T. C. Irving
- The Biophysics Collaborative Access Team (BioCAT), CSRRI and Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - J. P. R. O. Orgel
- The Biophysics Collaborative Access Team (BioCAT), CSRRI and Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
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139
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Sabatini C, Pashley DH. Mechanisms regulating the degradation of dentin matrices by endogenous dentin proteases and their role in dental adhesion. A review. AMERICAN JOURNAL OF DENTISTRY 2014; 27:203-214. [PMID: 25831604 PMCID: PMC4412266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE This systematic review provides an overview of the different mechanisms proposed to regulate the degradation of dentin matrices by host-derived dentin proteases, particularly as it relates to their role in dental adhesion. Significant developments have taken place over the last few years that have contributed to a better understanding of all the factors affecting the durability of adhesive resin restorations. The complexity of dentin-resin interfaces mandates a thorough understanding of all the mechanical, physical and biochemical aspects that play a role in the formation of hybrid layers. The ionic and hydrophilic nature of current dental adhesives yields permeable, unstable hybrid layers susceptible to water sorption, hydrolytic degradation and resin leaching. The hydrolytic activity of host-derived proteases also contributes to the degradation of the resin-dentin bonds. Preservation of the collagen matrix is critical to the improvement of resin-dentin bond durability. Approaches to regulate collagenolytic activity of dentin proteases have been the subject of extensive research in the last few years. A shift has occurred from the use of proteases inhibitors to the use of collagen cross-linking agents. Data provided by 51 studies published in peer-reviewed journals between January 1999 and December 2013 were compiled in this systematic review. RESULTS Appraisal of the data provided by the studies included in the present review yielded a summary of the mechanisms which have already proven to be clinically successful and those which need further investigation before new clinical protocols can be adopted.
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Affiliation(s)
- Camila Sabatini
- Department of Restorative Dentistry, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - David H. Pashley
- Department of Oral Biology, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA
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140
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Howes JM, Bihan D, Slatter DA, Hamaia SW, Packman LC, Knauper V, Visse R, Farndale RW. The recognition of collagen and triple-helical toolkit peptides by MMP-13: sequence specificity for binding and cleavage. J Biol Chem 2014; 289:24091-101. [PMID: 25008319 PMCID: PMC4148842 DOI: 10.1074/jbc.m114.583443] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Remodeling of collagen by matrix metalloproteinases (MMPs) is crucial to tissue homeostasis and repair. MMP-13 is a collagenase with a substrate preference for collagen II over collagens I and III. It recognizes a specific, well-known site in the tropocollagen molecule where its binding locally perturbs the triple helix, allowing the catalytic domain of the active enzyme to cleave the collagen α chains sequentially, at Gly775–Leu776 in collagen II. However, the specific residues upon which collagen recognition depends within and surrounding this locus have not been systematically mapped. Using our triple-helical peptide Collagen Toolkit libraries in solid-phase binding assays, we found that MMP-13 shows little affinity for Collagen Toolkit III, but binds selectively to two triple-helical peptides of Toolkit II. We have identified the residues required for the adhesion of both proMMP-13 and MMP-13 to one of these, Toolkit peptide II-44, which contains the canonical collagenase cleavage site. MMP-13 was unable to bind to a linear peptide of the same sequence as II-44. We also discovered a second binding site near the N terminus of collagen II (starting at helix residue 127) in Toolkit peptide II-8. The pattern of binding of the free hemopexin domain of MMP-13 was similar to that of the full-length enzyme, but the free catalytic subunit bound none of our peptides. The susceptibility of Toolkit peptides to proteolysis in solution was independent of the very specific recognition of immobilized peptides by MMP-13; the enzyme proved able to cleave a range of dissolved collagen peptides.
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Affiliation(s)
- Joanna-Marie Howes
- From the Department of Biochemistry, University of Cambridge, Downing Site, Cambridge CB2 1QW, United Kingdom
| | - Dominique Bihan
- From the Department of Biochemistry, University of Cambridge, Downing Site, Cambridge CB2 1QW, United Kingdom
| | - David A Slatter
- From the Department of Biochemistry, University of Cambridge, Downing Site, Cambridge CB2 1QW, United Kingdom
| | - Samir W Hamaia
- From the Department of Biochemistry, University of Cambridge, Downing Site, Cambridge CB2 1QW, United Kingdom
| | - Len C Packman
- From the Department of Biochemistry, University of Cambridge, Downing Site, Cambridge CB2 1QW, United Kingdom
| | - Vera Knauper
- the Cardiff University Dental School, Dental Drive, Cardiff CF14 4XY, United Kingdom, and
| | - Robert Visse
- the Kennedy Institute of Rheumatology, Hammersmith, London W6 8LH, United Kingdom
| | - Richard W Farndale
- From the Department of Biochemistry, University of Cambridge, Downing Site, Cambridge CB2 1QW, United Kingdom,
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141
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Anti-proteolytic capacity and bonding durability of proanthocyanidin-biomodified demineralized dentin matrix. Int J Oral Sci 2014; 6:168-74. [PMID: 24810807 PMCID: PMC4170148 DOI: 10.1038/ijos.2014.22] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2014] [Indexed: 01/20/2023] Open
Abstract
Our previous studies showed that biomodification of demineralized dentin collagen with proanthocyanidin (PA) for a clinically practical duration improves the mechanical properties of the dentin matrix and the immediate resin-dentin bond strength. The present study sought to evaluate the ability of PA biomodification to reduce collagenase-induced biodegradation of demineralized dentin matrix and dentin/adhesive interfaces in a clinically relevant manner. The effects of collagenolytic and gelatinolytic activity on PA-biomodified demineralized dentin matrix were analysed by hydroxyproline assay and gelatin zymography. Then, resin-/dentin-bonded specimens were prepared and challenged with bacterial collagenases. Dentin treated with 2% chlorhexidine and untreated dentin were used as a positive and negative control, respectively. Collagen biodegradation, the microtensile bond strengths of bonded specimens and the micromorphologies of the fractured interfaces were assessed. The results revealed that both collagenolytic and gelatinolytic activity on demineralized dentin were notably inhibited in the PA-biomodified groups, irrespective of PA concentration and biomodification duration. When challenged with exogenous collagenases, PA-biomodified bonded specimens exhibited significantly less biodegradation and maintained higher bond strengths than the untreated control. These results suggest that PA biomodification was effective at inhibiting proteolytic activity on demineralized dentin matrix and at stabilizing the adhesive/dentin interface against enzymatic degradation, is a new concept that has the potential to improve bonding durability.
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142
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Abstract
Bacterial collagenases are metalloproteinases involved in the degradation of the extracellular matrices of animal cells, due to their ability to digest native collagen. These enzymes are important virulence factors in a variety of pathogenic bacteria. Nonetheless, there is a lack of scientific consensus for a proper and well-defined classification of these enzymes and a vast controversy regarding the correct identification of collagenases. Clostridial collagenases were the first ones to be identified and characterized and are the reference enzymes for comparison of newly discovered collagenolytic enzymes. In this review we present the most recent data regarding bacterial collagenases and overview the functional and structural diversity of bacterial collagenases. An overall picture of the molecular diversity and distribution of these proteins in nature will also be given. Particular aspects of the different proteolytic activities will be contextualized within relevant areas of application, mainly biotechnological processes and therapeutic uses. At last, we will present a new classification guide for bacterial collagenases that will allow the correct and straightforward classification of these enzymes.
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Affiliation(s)
- Ana Sofia Duarte
- a Department of Biology and Cesam , University of Aveiro, Campus Universitario de Santiago , Aveiro , Portugal
| | - Antonio Correia
- a Department of Biology and Cesam , University of Aveiro, Campus Universitario de Santiago , Aveiro , Portugal
| | - Ana Cristina Esteves
- a Department of Biology and Cesam , University of Aveiro, Campus Universitario de Santiago , Aveiro , Portugal
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143
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Wang H, Liang Y, Wang H, Zhang H, Wang M, Liu L. Physical-Chemical Properties of Collagens from Skin, Scale, and Bone of Grass Carp (Ctenopharyngodon idellus). JOURNAL OF AQUATIC FOOD PRODUCT TECHNOLOGY 2014. [DOI: 10.1080/10498850.2012.713450] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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144
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Chaterji S, Kim P, Choe SH, Tsui JH, Lam CH, Ho DS, Baker AB, Kim DH. Synergistic effects of matrix nanotopography and stiffness on vascular smooth muscle cell function. Tissue Eng Part A 2014; 20:2115-26. [PMID: 24694244 DOI: 10.1089/ten.tea.2013.0455] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Vascular smooth muscle cells (vSMCs) retain the ability to undergo modulation in their phenotypic continuum, ranging from a mature contractile state to a proliferative, secretory state. vSMC differentiation is modulated by a complex array of microenvironmental cues, which include the biochemical milieu of the cells and the architecture and stiffness of the extracellular matrix. In this study, we demonstrate that by using UV-assisted capillary force lithography (CFL) to engineer a polyurethane substratum of defined nanotopography and stiffness, we can facilitate the differentiation of cultured vSMCs, reduce their inflammatory signature, and potentially promote the optimal functioning of the vSMC contractile and cytoskeletal machinery. Specifically, we found that the combination of medial tissue-like stiffness (11 MPa) and anisotropic nanotopography (ridge width_groove width_ridge height of 800_800_600 nm) resulted in significant upregulation of calponin, desmin, and smoothelin, in addition to the downregulation of intercellular adhesion molecule-1, tissue factor, interleukin-6, and monocyte chemoattractant protein-1. Further, our results allude to the mechanistic role of the RhoA/ROCK pathway and caveolin-1 in altered cellular mechanotransduction pathways via differential matrix nanotopography and stiffness. Notably, the nanopatterning of the stiffer substrata (1.1 GPa) resulted in the significant upregulation of RhoA, ROCK1, and ROCK2. This indicates that nanopatterning an 800_800_600 nm pattern on a stiff substratum may trigger the mechanical plasticity of vSMCs resulting in a hypercontractile vSMC phenotype, as observed in diabetes or hypertension. Given that matrix stiffness is an independent risk factor for cardiovascular disease and that CFL can create different matrix nanotopographic patterns with high pattern fidelity, we are poised to create a combinatorial library of arterial test beds, whether they are healthy, diseased, injured, or aged. Such high-throughput testing environments will pave the way for the evolution of the next generation of vascular scaffolds that can effectively crosstalk with the scaffold microenvironment and result in improved clinical outcomes.
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Affiliation(s)
- Somali Chaterji
- 1 Department of Biomedical Engineering, Cockrell School of Engineering, The University of Texas at Austin , Austin, Texas
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145
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Jiang Y, Lu S. Three-dimensional insights into dermal tissue as a cue for cellular behavior. Burns 2014; 40:191-9. [DOI: 10.1016/j.burns.2013.09.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 08/22/2013] [Accepted: 09/29/2013] [Indexed: 01/23/2023]
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146
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Orgel JPRO, Persikov AV, Antipova O. Variation in the helical structure of native collagen. PLoS One 2014; 9:e89519. [PMID: 24586843 PMCID: PMC3933592 DOI: 10.1371/journal.pone.0089519] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 01/21/2014] [Indexed: 01/13/2023] Open
Abstract
The structure of collagen has been a matter of curiosity, investigation, and debate for the better part of a century. There has been a particularly productive period recently, during which much progress has been made in better describing all aspects of collagen structure. However, there remain some questions regarding its helical symmetry and its persistence within the triple-helix. Previous considerations of this symmetry have sometimes confused the picture by not fully recognizing that collagen structure is a highly complex and large hierarchical entity, and this affects and is effected by the super-coiled molecules that make it. Nevertheless, the symmetry question is not trite, but of some significance as it relates to extracellular matrix organization and cellular integration. The correlation between helical structure in the context of the molecular packing arrangement determines which parts of the amino acid sequence of the collagen fibril are buried or accessible to the extracellular matrix or the cell. In this study, we concentrate primarily on the triple-helical structure of fibrillar collagens I and II, the two most predominant types. By comparing X-ray diffraction data collected from type I and type II containing tissues, we point to evidence for a range of triple-helical symmetries being extant in the molecules native environment. The possible significance of helical instability, local helix dissociation and molecular packing of the triple-helices is discussed in the context of collagen's supramolecular organization, all of which must affect the symmetry of the collagen triple-helix.
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Affiliation(s)
- Joseph P. R. O. Orgel
- Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois, United States of America
- Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology, Chicago, Illinois, United States of America
- BioCAT, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, United States of America
- * E-mail:
| | - Anton V. Persikov
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, New Jersey, United States of America
| | - Olga Antipova
- Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology, Chicago, Illinois, United States of America
- BioCAT, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, United States of America
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147
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Willis AL, Sabeh F, Li XY, Weiss SJ. Extracellular matrix determinants and the regulation of cancer cell invasion stratagems. J Microsc 2014; 251:250-60. [PMID: 23924043 DOI: 10.1111/jmi.12064] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 06/13/2013] [Indexed: 12/13/2022]
Abstract
During development, wound repair and disease-related processes, such as cancer, normal, or neoplastic cell types traffic through the extracellular matrix (ECM), the complex composite of collagens, elastin, glycoproteins, proteoglycans, and glycosaminoglycans that dictate tissue architecture. Current evidence suggests that tissue-invasive processes may proceed by protease-dependent or protease-independent strategies whose selection is not only governed by the characteristics of the motile cell population, but also by the structural properties of the intervening ECM. Herein, we review the mechanisms by which ECM dimensionality, elasticity, crosslinking, and pore size impact patterns of cell invasion. This summary should prove useful when designing new experimental approaches for interrogating invasion programs as well as identifying potential cellular targets for next-generation therapeutics.
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Affiliation(s)
- A L Willis
- Division of Molecular Medicine & Genetics, Department of Internal Medicine, and the Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, USA
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148
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de Wild M, Pomp W, Koenderink GH. Thermal memory in self-assembled collagen fibril networks. Biophys J 2014; 105:200-10. [PMID: 23823240 DOI: 10.1016/j.bpj.2013.05.035] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 04/26/2013] [Accepted: 05/10/2013] [Indexed: 01/20/2023] Open
Abstract
Collagen fibrils form extracellular networks that regulate cell functions and provide mechanical strength to tissues. Collagen fibrillogenesis is an entropy-driven process promoted by warming and reversed by cooling. Here, we investigate the influence of noncovalent interactions mediated by the collagen triple helix on fibril stability. We measure the kinetics of cold-induced disassembly of fibrils formed from purified collagen I using turbimetry, probe the fibril morphology by atomic force microscopy, and measure the network connectivity by confocal microscopy and rheometry. We demonstrate that collagen fibrils disassemble by subunit release from their sides as well as their ends, with complex kinetics involving an initial fast release followed by a slow release. Surprisingly, the fibrils are gradually stabilized over time, leading to thermal memory. This dynamic stabilization may reflect structural plasticity of the collagen fibrils arising from their complex structure. In addition, we propose that the polymeric nature of collagen monomers may lead to slow kinetics of subunit desorption from the fibril surface. Dynamic stabilization of fibrils may be relevant in the initial stages of collagen assembly during embryogenesis, fibrosis, and wound healing. Moreover, our results are relevant for tissue repair and drug delivery applications, where it is crucial to control fibril stability.
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Affiliation(s)
- Martijn de Wild
- Biological Soft Matter Group, FOM Institute AMOLF, Amsterdam, The Netherlands
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149
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McGee MP, Morykwas M, Campbell D, Hoge K, Argenta L. Interstitial-matrix edema in burns: Mechanistic insights from subatmospheric pressure treatment in vivo. Wound Repair Regen 2014; 22:96-102. [DOI: 10.1111/wrr.12123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 09/12/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Maria P. McGee
- Plastic and Reconstructive Surgery Research; Wake Forest University School of Medicine; Winston-Salem North Carolina
| | - Michael Morykwas
- Plastic and Reconstructive Surgery Research; Wake Forest University School of Medicine; Winston-Salem North Carolina
| | - Douglas Campbell
- Plastic and Reconstructive Surgery Research; Wake Forest University School of Medicine; Winston-Salem North Carolina
| | - Kathie Hoge
- Plastic and Reconstructive Surgery Research; Wake Forest University School of Medicine; Winston-Salem North Carolina
| | - Louis Argenta
- Plastic and Reconstructive Surgery Research; Wake Forest University School of Medicine; Winston-Salem North Carolina
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150
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Liu S, Wang N, Chen P, Li X, Liu C. Effect of huanglianjiedu tang on fever in rats induced by 2, 4-dinitrophenol. J TRADIT CHIN MED 2014; 33:492-9. [PMID: 24187871 DOI: 10.1016/s0254-6272(13)60154-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To study metabolic characteristics of fever in rats induced by 2, 4-dinitrophenol (DNP) and the effect of Huanglianjiedu Tang (HLJDT) on the fever. METHODS The urine samples were analyzed by ultra-performance liquid chromatography/electrospray ionization quadruple time-of-flight mass spectrometry (UPLC/ESI-Q-TOF-MS) at the positive ion mode scanning, and experimental data were analyzed by the principal component analysis. RESULTS Eight potential biomarkers indicating the occurrence and evolvement of fever were determined according to ions in urine samples. Five of them were found increased, while the other three decreased. After HLJDD intervention, the increased five were reduced significantly in high dose group, compared with model group, while the decreased three had no obvious change. Five of the eight biomakers were identified with formyl-5-hydroxykynurenamine, gentisic acid, aminoadipic acid, phenylacetic acid, L-phenylalanyl-L-hydroxyproline on the basis of MS/MS. These biomarkers are associated with the metabolism of 5-hydroxytryptamine, tyrosine, lysine, phenylalanine and collagen protein, respectively. CONCLUSION HLJDT had significant effect on DNP-induced fever in rats. The effect was performed possibly by acting on 5-hydroxytryptamine in hypothalamus and some amino acid metabolism. These results suggested that HLJDT relieved fever by acting on multi-targets.
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Affiliation(s)
- Shumin Liu
- Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, Harbin 150040, China
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