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Yeganegi A, Whitehead K, de Castro Brás LE, Richardson WJ. Mechanical strain modulates extracellular matrix degradation and byproducts in an isoform-specific manner. Biochim Biophys Acta Gen Subj 2023; 1867:130286. [PMID: 36464138 PMCID: PMC9852084 DOI: 10.1016/j.bbagen.2022.130286] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 11/09/2022] [Accepted: 11/22/2022] [Indexed: 12/03/2022]
Abstract
Many studies have shown that mechanical forces can alter collagen degradation by proteases, and this mechanochemical effect may potentially serve an important role in determining extracellular matrix content and organization in load-bearing tissues. However, it is not yet known whether mechano-sensitive degradation depends on particular protease isoforms, nor is it yet known whether particular degradation byproducts can be altered by mechanical loading. In this study, we tested the hypothesis that different types of proteases exhibit different sensitivities to mechanical loading both in degradation rates and byproducts. Decellularized porcine pericardium samples were treated with human recombinant matrix metalloproteinases-1, -8, -9, cathepsin K, or a protease-free control while subjected to different levels of strain in a planar, biaxial mechanical tester. Tissue degradation was monitored by tracking the decay in mechanical stresses during displacement control tests, and byproducts were assessed by mass spectrometry analysis of the sample supernatant after degradation. Our key finding shows that cathepsin K-mediated degradation of collagenous tissue was enhanced with increasing strain, while MMP1-, MMP8-, and MMP9-mediated degradation were first decreased and then increased by strain. Degradation induced changes in tissue mechanical properties, and proteomic analysis revealed strain-sensitive degradome signatures with different ECM byproducts released at low vs. high strains. This evidence suggests a potentially new type of mechanobiology wherein mechanical forces alter the degradation products that can provide important signaling feedback functions during tissue remodeling.
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Affiliation(s)
- Amirreza Yeganegi
- Department of Bioengineering, Clemson University, Clemson, SC, United States of America
| | - Kaitlin Whitehead
- Department of Physiology, East Carolina University, Greenville, NC, United States of America
| | | | - William J Richardson
- Department of Chemical Engineering, University of Arkansas, Fayetteville, AR, United States of America.
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2
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Guo Y, Mofrad MRK, Tepole AB. On modeling the multiscale mechanobiology of soft tissues: Challenges and progress. BIOPHYSICS REVIEWS 2022; 3:031303. [PMID: 38505274 PMCID: PMC10903412 DOI: 10.1063/5.0085025] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 07/12/2022] [Indexed: 03/21/2024]
Abstract
Tissues grow and remodel in response to mechanical cues, extracellular and intracellular signals experienced through various biological events, from the developing embryo to disease and aging. The macroscale response of soft tissues is typically nonlinear, viscoelastic anisotropic, and often emerges from the hierarchical structure of tissues, primarily their biopolymer fiber networks at the microscale. The adaptation to mechanical cues is likewise a multiscale phenomenon. Cell mechanobiology, the ability of cells to transform mechanical inputs into chemical signaling inside the cell, and subsequent regulation of cellular behavior through intra- and inter-cellular signaling networks, is the key coupling at the microscale between the mechanical cues and the mechanical adaptation seen macroscopically. To fully understand mechanics of tissues in growth and remodeling as observed at the tissue level, multiscale models of tissue mechanobiology are essential. In this review, we summarize the state-of-the art modeling tools of soft tissues at both scales, the tissue level response, and the cell scale mechanobiology models. To help the interested reader become more familiar with these modeling frameworks, we also show representative examples. Our aim here is to bring together scientists from different disciplines and enable the future leap in multiscale modeling of tissue mechanobiology.
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Affiliation(s)
- Yifan Guo
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - Mohammad R. K. Mofrad
- Departments of Bioengineering and Mechanical Engineering, University of California Berkeley, Berkeley, California 94720, USA
| | - Adrian Buganza Tepole
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA
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3
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Gouissem A, Mbarki R, Al Khatib F, Adouni M. Multiscale Characterization of Type I Collagen Fibril Stress–Strain Behavior under Tensile Load: Analytical vs. MD Approaches. Bioengineering (Basel) 2022; 9:bioengineering9050193. [PMID: 35621471 PMCID: PMC9138028 DOI: 10.3390/bioengineering9050193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/17/2022] [Accepted: 04/26/2022] [Indexed: 11/24/2022] Open
Abstract
Type I collagen is one of the most important proteins in the human body because of its role in providing structural support to the extracellular matrix of the connective tissues. Understanding its mechanical properties was widely investigated using experimental testing as well as molecular and finite element simulations. In this work, we present a new approach for defining the properties of the type I collagen fibrils by analytically formulating its response when subjected to a tensile load and investigating the effects of enzymatic crosslinks on the behavioral response. We reveal some of the shortcomings of the molecular dynamics (MD) method and how they affect the obtained stress–strain behavior of the fibril, and we prove that not only does MD underestimate the Young’s modulus and the ultimate tensile strength of the collagen fibrils, but also fails to detect the mechanics of some stretching phases of the fibril. We prove that non-crosslinked fibrils have three tension phases: (i) an initial elastic deformation corresponding to the collagen molecule uncoiling, (ii) a linear regime related to the stretching of the backbone of the tropocollagen molecules, and (iii) a plastic regime dominated by molecular sliding. We also show that for crosslinked fibrils, the second regime can be subdivided into three sub-regimes, and we define the properties of each regime. We also prove, analytically, the alleged MD quadratic relation between the ultimate tensile strength of the fibril and the concentration of enzymatic crosslinks (β).
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Affiliation(s)
- Afif Gouissem
- Mechanical Engineering Department, Australian University, East Mishref, Kuwait City P.O. Box 1411, Kuwait; (A.G.); (R.M.); (F.A.K.)
| | - Raouf Mbarki
- Mechanical Engineering Department, Australian University, East Mishref, Kuwait City P.O. Box 1411, Kuwait; (A.G.); (R.M.); (F.A.K.)
| | - Fadi Al Khatib
- Mechanical Engineering Department, Australian University, East Mishref, Kuwait City P.O. Box 1411, Kuwait; (A.G.); (R.M.); (F.A.K.)
| | - Malek Adouni
- Mechanical Engineering Department, Australian University, East Mishref, Kuwait City P.O. Box 1411, Kuwait; (A.G.); (R.M.); (F.A.K.)
- Physical Medicine and Rehabilitation Department, Northwestern University, Chicago, IL 60611, USA
- Correspondence:
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4
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Blackburn BJ, Rollins AM, Dupps WJ. Biomechanics of Ophthalmic Crosslinking. Transl Vis Sci Technol 2021; 10:8. [PMID: 34328498 PMCID: PMC8327749 DOI: 10.1167/tvst.10.5.8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 06/19/2021] [Indexed: 12/12/2022] Open
Abstract
Crosslinking involves the formation of bonds between polymer chains, such as proteins. In biological tissues, these bonds tend to stiffen the tissue, making it more resistant to mechanical degradation and deformation. In ophthalmology, the crosslinking phenomenon is being increasingly harnessed and explored as a treatment strategy for treating corneal ectasias, keratitis, degenerative myopia, and glaucoma. This review surveys the multitude of exogenous crosslinking strategies reported in the literature, both "light" (involving light energy) and "dark" (involving non-photic chemical processes), and explores their mechanisms, cytotoxicity, and stage of translational development. The spectrum of ophthalmic applications described in the literature is then discussed, with particular attention to proposed therapeutic mechanisms in the cornea and sclera. The mechanical effects of crosslinking are then discussed in the context of their proposed site and scale of action. Biomechanical characterization of the crosslinking effect is needed to more thoroughly address knowledge gaps in this area, and a review of reported methods for biomechanical characterization is presented with an attempt to assess the sensitivity of each method to crosslinking-mediated changes using data from the experimental and clinical literature. Biomechanical measurement methods differ in spatial resolution, mechanical sensitivity, suitability for detecting crosslinking subtypes, and translational readiness and are central to the effort to understand the mechanistic link between crosslinking methods and clinical outcomes of candidate therapies. Data on differences in the biomechanical effect of different crosslinking protocols and their correspondence to clinical outcomes are reviewed, and strategies for leveraging measurement advances predicting clinical outcomes of crosslinking procedures are discussed. Advancing the understanding of ophthalmic crosslinking, its biomechanical underpinnings, and its applications supports the development of next-generation crosslinking procedures that optimize therapeutic effect while reducing complications.
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Affiliation(s)
- Brecken J. Blackburn
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Andrew M. Rollins
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - William J. Dupps
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
- Cole Eye Institute, Cleveland Clinic, Cleveland, OH, USA
- Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, USA
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
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5
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On collagen fiber morphoelasticity and homeostatic remodeling tone. J Mech Behav Biomed Mater 2020; 113:104154. [PMID: 33158790 DOI: 10.1016/j.jmbbm.2020.104154] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 03/14/2020] [Accepted: 10/21/2020] [Indexed: 11/23/2022]
Abstract
A variety of biochemical and physical processes participate in the creation and maintenance of collagen in biological tissue. Under mechanical stimuli these collagen fibers undergo continuous processes of morphoelastic change. The model presented here is motivated by experimental reports of stretch-stabilization of the collagen fibers to enzymatic degradation. The fiber structure is modeled in terms of a fiber density evolution that is regulated by means of a fixed creation rate and a mechano-sensitive dissolution rate. The theory accounts for the possibly different natural configurations of the fiber unit constituents and the ground substance matrix. It also generalizes previous theoretical descriptions so as to account for finite survival times of the individual fiber units. Special consideration is given to steady state fiber-remodeling processes in which fiber creation and dissolution are in balance. Fiber assembly processes that involve prestretching the fiber constituents yield a homeostatic stress response with a characteristic fiber tone. Fiber density returns to homeostasis after mechanical disruption when sufficient time has passed.
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6
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Gaul RT, Nolan DR, Ristori T, Bouten CV, Loerakker S, Lally C. Pressure-induced collagen degradation in arterial tissue as a potential mechanism for degenerative arterial disease progression. J Mech Behav Biomed Mater 2020; 109:103771. [DOI: 10.1016/j.jmbbm.2020.103771] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/26/2020] [Accepted: 04/01/2020] [Indexed: 12/12/2022]
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7
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Gou K, Topol H, Demirkoparan H, Pence TJ. Stress-Swelling Finite Element Modeling of Cervical Response With Homeostatic Collagen Fiber Distributions. J Biomech Eng 2020; 142:1072289. [PMID: 31891375 DOI: 10.1115/1.4045810] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Indexed: 01/01/2023]
Abstract
During pregnancy, the cervix experiences significant mechanical property change due to tissue swelling, and to ongoing changes in the collagen content. In this paper, we model how these two effects contribute to cervical deformation as the pressure load on top of the cervix increases. The cervix and its surrounding supporting ligaments are taken into consideration in the resulting mechanical analysis. The cervix itself is treated as a multilayered tube-like structure, with layer-specific collagen orientation. The cervical tissue in each layer is treated in terms of a collagen constituent that remodels with time within a ground substance matrix that experiences swelling. The load and swelling are taken to change sufficiently slowly so that the collagen properties at any instant can be regarded as being in a state of homeostasis. Among other things, the simulations show how the luminal cross-sectional area varies along its length as a function of pressure and swelling. In general, an increase in pressure causes an overall shortening of the lumen while an increase in swelling has the opposite effect.
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Affiliation(s)
- Kun Gou
- Department of Science and Mathematics, Texas A&M University-San Antonio, San Antonio, TX 78224
| | - Heiko Topol
- Carnegie Mellon University in Qatar, Education City, P.O. Box 24866, Doha, Qatar
| | - Hasan Demirkoparan
- Carnegie Mellon University in Qatar, Education City, P.O. Box 24866, Doha, Qatar
| | - Thomas J Pence
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824
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8
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A micromechanical model for the growth of collagenous tissues under mechanics-mediated collagen deposition and degradation. J Mech Behav Biomed Mater 2019; 98:96-107. [DOI: 10.1016/j.jmbbm.2019.06.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/30/2019] [Accepted: 06/05/2019] [Indexed: 12/30/2022]
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9
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Safa B, Lee A, Santare MH, Elliott DM. Evaluating Plastic Deformation and Damage as Potential Mechanisms for Tendon Inelasticity using a Reactive Modeling Framework. J Biomech Eng 2019; 141:2731931. [PMID: 31004138 DOI: 10.1115/1.4043520] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Indexed: 12/12/2022]
Abstract
Inelastic behaviors, such as softening, a progressive decrease in modulus before failure, occur in tendon and are important aspect in degeneration and tendinopathy. These inelastic behaviors are generally attributed to two potential mechanisms: plastic deformation and damage. However, it is not clear which is primarily responsible. In this study, we evaluated these potential mechanisms of tendon inelasticity by using a recently developed reactive inelasticity model (RIE), which is a structurally-inspired continuum mechanics framework that models tissue inelasticity based on the molecular bond kinetics. Using RIE, we formulated two material models, one specific to plastic deformation and the other to damage. The models were independently fit to published experimental tensile tests of rat tail tendons. We quantified the inelastic effects and compared the performance of the two models in fitting the mechanical response during loading, relaxation, unloading, and reloading phases. Additionally, we validated the models by using the resulting fit parameters to predict an independent set of experimental stress-strain curves from ramp-to-failure tests. Overall, the models were both successful in fitting the experiments and predicting the validation data. However, the results did not strongly favor one mechanism over the other. As a result, to distinguish between plastic deformation and damage, different experimental protocols will be needed. Nevertheless, these findings suggest the potential of RIE as a comprehensive framework for studying tendon inelastic behaviors.
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Affiliation(s)
- Babak Safa
- Department of Mechanical Engineering, Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716
| | - Andrea Lee
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716
| | - Michael H Santare
- ASME Fellow, Department of Mechanical Engineering, Department of Biomedical Engineering, University of Delaware Newark, Delaware 19716
| | - Dawn M Elliott
- ASME Fellow, Department of Biomedical Engineering, Department of Mechanical Engineering, University of Delaware Newark, Delaware 19716
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10
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Kirkness MWH, Forde NR. Single-Molecule Assay for Proteolytic Susceptibility: Force-Induced Collagen Destabilization. Biophys J 2019; 114:570-576. [PMID: 29414702 DOI: 10.1016/j.bpj.2017.12.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 12/01/2017] [Accepted: 12/11/2017] [Indexed: 01/07/2023] Open
Abstract
Force plays a key role in regulating dynamics of biomolecular structure and interactions, yet techniques are lacking to manipulate and continuously read out this response with high throughput. We present an enzymatic assay for force-dependent accessibility of structure that makes use of a wireless mini-radio centrifuge force microscope to provide a real-time readout of kinetics. The microscope is designed for ease of use, fits in a standard centrifuge bucket, and offers high-throughput, video-rate readout of individual proteolytic cleavage events. Proteolysis measurements on thousands of tethered collagen molecules show a load-enhanced trypsin sensitivity, indicating destabilization of the triple helix.
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Affiliation(s)
- Michael W H Kirkness
- Department of Molecular Biology and Biochemistry, Burnaby, British Columbia, Canada
| | - Nancy R Forde
- Department of Molecular Biology and Biochemistry, Burnaby, British Columbia, Canada; Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada.
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11
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Bose P, Eyckmans J, Nguyen TD, Chen CS, Reich DH. Effects of Geometry on the Mechanics and Alignment of Three-Dimensional Engineered Microtissues. ACS Biomater Sci Eng 2018; 5:3843-3855. [DOI: 10.1021/acsbiomaterials.8b01183] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Prasenjit Bose
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Jeroen Eyckmans
- Department of Biomedical Engineering and the Biological Design Center, Boston University, Boston, Massachusetts 02215, United States
- The Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
| | - Thao D. Nguyen
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Christopher S. Chen
- Department of Biomedical Engineering and the Biological Design Center, Boston University, Boston, Massachusetts 02215, United States
- The Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
| | - Daniel H. Reich
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, United States
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12
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Gaul R, Nolan D, Ristori T, Bouten C, Loerakker S, Lally C. Strain mediated enzymatic degradation of arterial tissue: Insights into the role of the non-collagenous tissue matrix and collagen crimp. Acta Biomater 2018; 77:301-310. [PMID: 30126592 DOI: 10.1016/j.actbio.2018.06.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/04/2018] [Accepted: 06/29/2018] [Indexed: 02/07/2023]
Abstract
Collagen fibre remodelling is a strain dependent process which is stimulated by the degradation of existing collagen. To date, literature has focussed on strain dependent degradation of pure collagen or structurally simple collagenous tissues, often overlooking degradation within more complex, heterogenous soft tissues. The aim of this study is to identify, for the first time, the strain dependent degradation behaviour and mechanical factors influencing collagen degradation in arterial tissue using a combined experimental and numerical approach. To achieve this, structural analysis was carried out using small angle light scattering to determine the fibre level response due to strain induced degradation. Next, strain dependent degradation rates were determined from stress relaxation experiments in the presence of crude and purified collagenase to determine the tissue level degradation response. Finally, a 1D theoretical model was developed, incorporating matrix stiffness and a gradient of collagen fibre crimp to decouple the mechanism behind strain dependent arterial degradation. SALS structural analysis identified a strain mediated degradation response in arterial tissue at the fibre level not dissimilar to that found in literature for pure collagen. Interestingly, two distinctly different strain mediated degradation responses were identified experimentally at the tissue level, not seen in other collagenous tissues. Our model was able to accurately predict these experimental findings, but only once the load bearing matrix, its degradation response and the gradient of collagen fibre crimp across the arterial wall were incorporated. These findings highlight the critical role that the various tissue constituents play in the degradation response of arterial tissue. STATEMENT OF SIGNIFICANCE Collagen fibre architecture is the dominant load bearing component of arterial tissue. Remodelling of this architecture is a strain dependent process stimulated by the degradation of existing collagen. Despite this, degradation of arterial tissue and in particular, arterial collagen, is not fully understood or studied. In the current study, we identified for the first time, the strain dependent degradation response of arterial tissue, which has not been observed in other collagenous tissues in literature. We hypothesised that this unique degradation response was due to the complex structure observed in arterial tissue. Based on this hypothesis, we developed a novel numerical model capable of explaining this unique degradation response which may provide critical insights into disease development and aid in the design of interventional medical devices.
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13
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Pouran B, Moshtagh PR, Arbabi V, Snabel J, Stoop R, Ruberti J, Malda J, Zadpoor AA, Weinans H. Non-enzymatic cross-linking of collagen type II fibrils is tuned via osmolality switch. J Orthop Res 2018; 36:1929-1936. [PMID: 29334127 PMCID: PMC6099510 DOI: 10.1002/jor.23857] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 01/08/2018] [Indexed: 02/04/2023]
Abstract
An important aspect in cartilage ageing is accumulation of advanced glycation end products (AGEs) after exposure to sugars. Advanced glycation results in cross-links formation between the collagen fibrils in articular cartilage, hampering their flexibility and making cartilage more brittle. In the current study, we investigate whether collagen cross-linking after exposure to sugars depends on the stretching condition of the collagen fibrils. Healthy equine cartilage specimens were exposed to l-threose sugar and placed in hypo-, iso-, or hyper-osmolal conditions that expanded or shrank the tissue and changed the 3D conformation of collagen fibrils. We applied micro-indentation tests, contrast enhanced micro-computed tomography, biochemical measurement of pentosidine cross-links, and cartilage surface color analysis to assess the effects of advanced glycation cross-linking under these different conditions. Swelling of extracellular matrix due to hypo-osmolality made cartilage less susceptible to advanced glycation, namely, the increase in effective Young's modulus was approximately 80% lower in hypo-osmolality compared to hyper-osmolality and pentosidine content per collagen was 47% lower. These results indicate that healthy levels of glycosaminoglycans not only keep cartilage stiffness at appropriate levels by swelling and pre-stressed collagen fibrils, but also protect collagen fibrils from adverse effects of advanced glycation. These findings highlight the fact that collagen fibrils and therefore cartilage can be protected from further advanced glycation ("ageing") by maintaining the joint environment at sufficiently low osmolality. Understanding of mechanochemistry of collagen fibrils provided here might evoke potential ageing prohibiting strategies against cartilage deterioration. © 2018 The Authors. Journal of Orthopaedic Research Published by Wiley Periodicals, Inc. on behalf of Orthopaedic Research Society. J Orthop Res 36:1929-1936, 2018.
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Affiliation(s)
- Behdad Pouran
- Department of OrthopedicsUMC UtrechtHeidelberglaan100, 3584CX UtrechtThe Netherlands,Faculty of Mechanical, Maritime, and Materials Engineering, Department of Biomechanical EngineeringDelft University of Technology (TU Delft)Mekelweg 2, 2628CDDelftThe Netherlands
| | - Parisa R. Moshtagh
- Department of OrthopedicsUMC UtrechtHeidelberglaan100, 3584CX UtrechtThe Netherlands,Faculty of Mechanical, Maritime, and Materials Engineering, Department of Biomechanical EngineeringDelft University of Technology (TU Delft)Mekelweg 2, 2628CDDelftThe Netherlands
| | - Vahid Arbabi
- Department of OrthopedicsUMC UtrechtHeidelberglaan100, 3584CX UtrechtThe Netherlands,Faculty of Mechanical, Maritime, and Materials Engineering, Department of Biomechanical EngineeringDelft University of Technology (TU Delft)Mekelweg 2, 2628CDDelftThe Netherlands,Faculty of Engineering, Department of Mechanical EngineeringUniversity of Birjand615/97175BirjandIran
| | - Jessica Snabel
- Department of Metabolic Health ResearchTNOP.O. Box 22152301 CE LeidenThe Netherlands
| | - Reinout Stoop
- Department of Metabolic Health ResearchTNOP.O. Box 22152301 CE LeidenThe Netherlands
| | - Jeffrey Ruberti
- Department of BioengineeringNortheastern, University360 Huntington AvenueBostonMassachusetts02115
| | - Jos Malda
- Department of OrthopedicsUMC UtrechtHeidelberglaan100, 3584CX UtrechtThe Netherlands,Faculty of Veterinary Sciences, Department of Equine SciencesUtrecht UniversityYalelaan 1123584 CM UtrechtThe Netherlands
| | - Amir A. Zadpoor
- Faculty of Mechanical, Maritime, and Materials Engineering, Department of Biomechanical EngineeringDelft University of Technology (TU Delft)Mekelweg 2, 2628CDDelftThe Netherlands
| | - Harrie Weinans
- Department of OrthopedicsUMC UtrechtHeidelberglaan100, 3584CX UtrechtThe Netherlands,Faculty of Mechanical, Maritime, and Materials Engineering, Department of Biomechanical EngineeringDelft University of Technology (TU Delft)Mekelweg 2, 2628CDDelftThe Netherlands,Department of RheumatologyUMC UtrechtHeidelberglaan1003584CX UtrechtThe Netherlands
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14
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Chen ML, Ruberti JW, Nguyen TD. Increased stiffness of collagen fibrils following cyclic tensile loading. J Mech Behav Biomed Mater 2018; 82:345-354. [DOI: 10.1016/j.jmbbm.2018.03.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/13/2018] [Accepted: 03/23/2018] [Indexed: 11/29/2022]
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15
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Dietrich M, Le Roy H, Brückner DB, Engelke H, Zantl R, Rädler JO, Broedersz CP. Guiding 3D cell migration in deformed synthetic hydrogel microstructures. SOFT MATTER 2018; 14:2816-2826. [PMID: 29595213 DOI: 10.1039/c8sm00018b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The ability of cells to navigate through the extracellular matrix, a network of biopolymers, is controlled by an interplay of cellular activity and mechanical network properties. Synthetic hydrogels with highly tuneable compositions and elastic properties are convenient model systems for the investigation of cell migration in 3D polymer networks. To study the impact of macroscopic deformations on single cell migration, we present a novel method to introduce uniaxial strain in matrices by microstructuring photo-polymerizable hydrogel strips with embedded cells in a channel slide. We find that such confined swelling results in a strained matrix in which cells exhibit an anisotropic migration response parallel to the strain direction. Surprisingly, however, the anisotropy of migration reaches a maximum at intermediate strain levels and decreases strongly at higher strains. We account for this non-monotonic response in the migration anisotropy with a computational model, in which we describe a cell performing durotactic and proteolytic migration in a deformable elastic meshwork. Our simulations reveal that the macroscopically applied strain induces a local geometric anisotropic stiffening of the matrix. This local anisotropic stiffening acts as a guidance cue for directed cell migration, resulting in a non-monotonic dependence on strain, as observed in our experiments. Our findings provide a mechanism for mechanical guidance that connects network properties on the cellular scale to cell migration behaviour.
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Affiliation(s)
- Miriam Dietrich
- Faculty of Physics and Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany.
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16
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Collagen fibre characterisation in arterial tissue under load using SALS. J Mech Behav Biomed Mater 2017; 75:359-368. [DOI: 10.1016/j.jmbbm.2017.07.036] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 07/13/2017] [Accepted: 07/25/2017] [Indexed: 01/06/2023]
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