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The Effect of Enzymatic Crosslink Degradation on the Mechanics of the Anterior Cruciate Ligament: A Hybrid Multi-Domain Model. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11188580] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The anterior cruciate ligament’s (ACL) mechanics is an important factor governing the ligament’s integrity and, hence, the knee joint’s response. Despite many investigations in this area, the cause and effect of injuries remain unclear or unknown. This may be due to the complexity of the direct link between macro- and micro-scale damage mechanisms. In the first part of this investigation, a three-dimensional coarse-grained model of collagen fibril (type I) was developed using a bottom-up approach to investigate deformation mechanisms under tensile testing. The output of this molecular level was used later to calibrate the parameters of a hierarchical multi-scale fibril-reinforced hyper-elastoplastic model of the ACL. Our model enabled us to determine the mechanical behavior of the ACL as a function of the basic response of the collagen molecules. Modeled elastic response and damage distribution were in good agreement with the reported measurements and computational investigations. Our results suggest that degradation of crosslink content dictates the loss of the stiffness of the fibrils and, hence, damage to the ACL. Therefore, the proposed computational frame is a promising tool that will allow new insights into the biomechanics of the ACL.
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52
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Al-Shaer A, Lyons A, Ishikawa Y, Hudson BG, Boudko SP, Forde NR. Sequence-dependent mechanics of collagen reflect its structural and functional organization. Biophys J 2021; 120:4013-4028. [PMID: 34390685 DOI: 10.1016/j.bpj.2021.08.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 05/25/2021] [Accepted: 08/06/2021] [Indexed: 01/06/2023] Open
Abstract
Extracellular matrix mechanics influence diverse cellular functions, yet surprisingly little is known about the mechanical properties of their constituent collagen proteins. In particular, network-forming collagen IV, an integral component of basement membranes, has been far less studied than fibril-forming collagens. A key feature of collagen IV is the presence of interruptions in the triple-helix-defining (Gly-X-Y) sequence along its collagenous domain. Here, we used atomic force microscopy to determine the impact of sequence heterogeneity on the local flexibility of collagen IV and of the fibril-forming collagen III. Our extracted flexibility profile of collagen IV reveals that it possesses highly heterogeneous mechanics, ranging from semiflexible regions as found for fibril-forming collagens to a lengthy region of high flexibility toward its N-terminus. A simple model in which flexibility is dictated only by the presence of interruptions fit the extracted profile reasonably well, providing insight into the alignment of chains and demonstrating that interruptions, particularly when coinciding in multiple chains, significantly enhance local flexibility. To a lesser extent, sequence variations within the triple helix lead to variable flexibility, as seen along the continuously triple-helical collagen III. We found this fibril-forming collagen to possess a high-flexibility region around its matrix-metalloprotease binding site, suggesting a unique mechanical fingerprint of this region that is key for matrix remodeling. Surprisingly, proline content did not correlate with local flexibility in either collagen type. We also found that physiologically relevant changes in pH and chloride concentration did not alter the flexibility of collagen IV, indicating such environmental changes are unlikely to control its compaction during secretion. Although extracellular chloride ions play a role in triggering collagen IV network formation, they do not appear to modulate the structure of its collagenous domain.
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Affiliation(s)
- Alaa Al-Shaer
- Department of Molecular Biology and Biochemistry, Burnaby, British Columbia, Canada
| | - Aaron Lyons
- Department of Physics, Burnaby, British Columbia, Canada
| | - Yoshihiro Ishikawa
- Department of Ophthalmology, University of California San Francisco, School of Medicine, San Francisco, California
| | - Billy G Hudson
- Department of Medicine, Division of Nephrology and Hypertension, Nashville, Tennessee; Vanderbilt Center for Matrix Biology, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Biochemistry, Nashville, Tennessee; Department of Pathology, Microbiology, and Immunology, Nashville, Tennessee; Department of Cell and Developmental Biology, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Nashville, Tennessee; Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee
| | - Sergei P Boudko
- Department of Medicine, Division of Nephrology and Hypertension, Nashville, Tennessee; Vanderbilt Center for Matrix Biology, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Biochemistry, Nashville, Tennessee
| | - Nancy R Forde
- Department of Molecular Biology and Biochemistry, Burnaby, British Columbia, Canada; Department of Physics, Burnaby, British Columbia, Canada; Department of Chemistry, Burnaby, British Columbia, Canada; Centre for Cell Biology, Development and Disease, Simon Fraser University, Burnaby, British Columbia, Canada.
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53
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Kessler JL, Kang G, Qin Z, Kang H, Whitby FG, Cheatham TE, Hill CP, Li Y, Yu SM. Peptoid Residues Make Diverse, Hyperstable Collagen Triple-Helices. J Am Chem Soc 2021; 143:10910-10919. [PMID: 34255504 DOI: 10.1021/jacs.1c00708] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
As the only ribosomally encoded N-substituted amino acid, proline promotes distinct secondary protein structures. The high proline content in collagen, the most abundant protein in the human body, is crucial to forming its hallmark structure: the triple-helix. For over five decades, proline has been considered compulsory for synthetic designs aimed at recapitulating collagen's structure and properties. Here we describe that N-substituted glycines (N-glys), also known as peptoid residues, exhibit a general triple-helical propensity similar to or greater than proline, enabling synthesis of stable triple-helical collagen mimetic peptides (CMPs) with unprecedented side chain diversity. Supported by atomic-resolution crystal structures as well as circular dichroism and computational characterizations spanning over 30 N-gly-containing CMPs, we discovered that N-glys stabilize the triple-helix primarily by sterically preorganizing individual chains into the polyproline-II helix. We demonstrated that N-glys with exotic side chains including a "click"-able alkyne and a photosensitive side chain enable CMPs for functional applications including the spatiotemporal control of cell adhesion and migration. The structural principles uncovered in this study open up opportunities for a new generation of collagen-mimetic therapeutics and materials.
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Affiliation(s)
- Julian L Kessler
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Grace Kang
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Zhao Qin
- Department of Civil & Environmental Engineering, College of Engineering & Computer Science, Syracuse University, Syracuse, New York 13244, United States
| | - Helen Kang
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Frank G Whitby
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, Utah 84112, United States
| | - Thomas E Cheatham
- Department of Medicinal Chemistry, College of Pharmacy, L. S. Skaggs Pharmacy Research Institute, University of Utah, Salt Lake City, Utah 84112, United States
| | - Christopher P Hill
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, Utah 84112, United States
| | - Yang Li
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - S Michael Yu
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States.,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
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54
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Hartmann J, Zacharias M. Mechanism of collagen folding propagation studied by Molecular Dynamics simulations. PLoS Comput Biol 2021; 17:e1009079. [PMID: 34101748 PMCID: PMC8224937 DOI: 10.1371/journal.pcbi.1009079] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/24/2021] [Accepted: 05/13/2021] [Indexed: 11/19/2022] Open
Abstract
Collagen forms a characteristic triple helical structure and plays a central role for stabilizing the extra-cellular matrix. After a C-terminal nucleus formation folding proceeds to form long triple-helical fibers. The molecular details of triple helix folding process is of central importance for an understanding of several human diseases associated with misfolded or unstable collagen fibrils. However, the folding propagation is too rapid to be studied by experimental high resolution techniques. We employed multiple Molecular Dynamics simulations starting from unfolded peptides with an already formed nucleus to successfully follow the folding propagation in atomic detail. The triple helix folding was found to propagate involving first two chains forming a short transient template. Secondly, three residues of the third chain fold on this template with an overall mean propagation of ~75 ns per unit. The formation of loops with multiples of the repeating unit was found as a characteristic misfolding event especially when starting from an unstable nucleus. Central Gly→Ala or Gly→Thr substitutions resulted in reduced stability and folding rates due to structural deformations interfering with folding propagation. The extracellular matrix is stabilized by collagen, a fibrillar protein structure, which represents the most abundant protein of the human body. Collagen consists of three peptide chains that form an elongated triple helix with a repeating and largely conserved sequence pattern of two proline (or hydroxyproline) residues followed by a glycine. Several human diseases are associated with mutations in collagen. The folding propagation is the most critical step in the collagen structure formation and not well understood. We have used multiple Molecular Dynamics simulations to specifically investigate the mechanism of triple helix propagation and how it is affected by mutations. The folding propagation was found to involve first two chains forming a short transient template followed by three residues of the third chain to fold on this template. Additional simulations were used to characterize misfolding events such as loop formation and the effect of glycine substitutions on collagen folding.
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Affiliation(s)
- Julian Hartmann
- Center for Functional Protein Assemblies, Technische Universität München, Garching, Germany
| | - Martin Zacharias
- Center for Functional Protein Assemblies, Technische Universität München, Garching, Germany
- * E-mail:
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55
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Tiwari N, Wi S, Mentink-Vigier F, Sinha N. Mechanistic Insights into the Structural Stability of Collagen-Containing Biomaterials Such as Bones and Cartilage. J Phys Chem B 2021; 125:4757-4766. [PMID: 33929847 PMCID: PMC8151626 DOI: 10.1021/acs.jpcb.1c01431] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Structural stability of various collagen-containing biomaterials such as bones and cartilage is still a mystery. Despite the spectroscopic development of several decades, the detailed mechanism of collagen interaction with citrate in bones and glycosaminoglycans (GAGs) in the cartilage extracellular matrix (ECM) in its native state is unobservable. We present a significant advancement to probe the collagen interactions with citrate and GAGs in the ECM of native bones and cartilage along with specific/non-specific interactions inside the collagen assembly at the nanoscopic level through natural-abundance dynamic nuclear polarization-based solid-state nuclear magnetic resonance spectroscopy. The detected molecular-level interactions between citrate-collagen and GAG-collagen inside the native bone and cartilage matrices and other backbone and side-chain interactions in the collagen assembly are responsible for the structural stability and other biomechanical properties of these important classes of biomaterials.
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Affiliation(s)
- Nidhi Tiwari
- Centre of Biomedical Research, SGPGIMS Campus, Raebarelly Road, Lucknow – 226014, INDIA
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi – 221005, INDIA
| | - Sungsool Wi
- National High Magnetic Field Laboratory, Tallahassee, Florida 32304, USA
| | | | - Neeraj Sinha
- Centre of Biomedical Research, SGPGIMS Campus, Raebarelly Road, Lucknow – 226014, INDIA
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56
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Molecular engineering of piezoelectricity in collagen-mimicking peptide assemblies. Nat Commun 2021; 12:2634. [PMID: 33976129 PMCID: PMC8113556 DOI: 10.1038/s41467-021-22895-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 03/17/2021] [Indexed: 11/29/2022] Open
Abstract
Realization of a self-assembled, nontoxic and eco-friendly piezoelectric device with high-performance, sensitivity and reliability is highly desirable to complement conventional inorganic and polymer based materials. Hierarchically organized natural materials such as collagen have long been posited to exhibit electromechanical properties that could potentially be amplified via molecular engineering to produce technologically relevant piezoelectricity. Here, by using a simple, minimalistic, building block of collagen, we fabricate a peptide-based piezoelectric generator utilising a radically different helical arrangement of Phe-Phe-derived peptide, Pro-Phe-Phe and Hyp-Phe-Phe, based only on proteinogenic amino acids. The simple addition of a hydroxyl group increases the expected piezoelectric response by an order of magnitude (d35 = 27 pm V−1). The value is highest predicted to date in short natural peptides. We demonstrate tripeptide-based power generator that produces stable max current >50 nA and potential >1.2 V. Our results provide a promising device demonstration of computationally-guided molecular engineering of piezoelectricity in peptide nanotechnology. Piezoelectric materials which are non-toxic and eco-friendly are of interest. Here, the authors report on the creation of collagen-mimetic peptides which can be self-assembled into piezoelectric materials and study the design characteristics required for optimized power generation.
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57
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Taga Y, Tanaka K, Hattori S, Mizuno K. In-depth correlation analysis demonstrates that 4-hydroxyproline at the Yaa position of Gly-Xaa-Yaa repeats dominantly stabilizes collagen triple helix. Matrix Biol Plus 2021; 10:100067. [PMID: 34195597 PMCID: PMC8233474 DOI: 10.1016/j.mbplus.2021.100067] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/18/2021] [Accepted: 04/19/2021] [Indexed: 12/29/2022] Open
Abstract
4Hyp at the Yaa position of Gly-Xaa-Yaa repeats has the highest correlation with collagen denaturation temperature (Td), especially in vertebrates. Significant correlation with Td exists for Gly-Xaa-4Hyp tripeptides, but not for Gly-Pro-Yaa tripeptides. The in-depth correlation analysis demonstrates the dominating role of Yaa position 4Hyp for collagen stability.
There is a general consensus that collagen stability is largely maintained by Pro and its major hydroxylated form, 4-hydroxyproline (4Hyp). However, positional difference in their stabilizing effect at the Xaa or Yaa position of collagenous Gly-Xaa-Yaa sequences has remained inconclusive. Here, we position-specifically evaluated the correlation of imino acid contents to denaturation temperature (Td) of collagen among various vertebrate and invertebrate species, using a recently developed LC–MS methodology. 4Hyp at the Yaa position showed the highest positive correlation with Td, followed by Pro at the Xaa position, which was even further increased by excluding invertebrates. We confirmed that Gly-Pro-4Hyp liberated after bacterial collagenase digestion was highly positively correlated with Td. Furthermore, other tripeptides with Yaa position 4Hyp also had comparable positive correlation, excepting negative correlation of Gly-Gly-4Hyp, while tripeptides with Xaa position Pro did not. These data provide evidence that 4Hyp dominantly contributes to thermal stability of collagen depending on its sequence position, especially in vertebrates.
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Affiliation(s)
- Yuki Taga
- Nippi Research Institute of Biomatrix, 520-11 Kuwabara, Toride, Ibaraki 302-0017, Japan
| | - Keisuke Tanaka
- Nippi Research Institute of Biomatrix, 520-11 Kuwabara, Toride, Ibaraki 302-0017, Japan
| | - Shunji Hattori
- Nippi Research Institute of Biomatrix, 520-11 Kuwabara, Toride, Ibaraki 302-0017, Japan
| | - Kazunori Mizuno
- Nippi Research Institute of Biomatrix, 520-11 Kuwabara, Toride, Ibaraki 302-0017, Japan
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58
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Qiu Y, Zhai C, Chen L, Liu X, Yeo J. Current Insights on the Diverse Structures and Functions in Bacterial Collagen-like Proteins. ACS Biomater Sci Eng 2021. [PMID: 33871954 DOI: 10.1021/acsbiomaterials.1c00018] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The dearth of knowledge on the diverse structures and functions in bacterial collagen-like proteins is in stark contrast to the deep grasp of structures and functions in mammalian collagen, the ubiquitous triple-helical scleroprotein that plays a central role in tissue architecture, extracellular matrix organization, and signal transduction. To fill and highlight existing gaps due to the general paucity of data on bacterial CLPs, we comprehensively reviewed the latest insight into their functional and structural diversity from multiple perspectives of biology, computational simulations, and materials engineering. The origins and discovery of bacterial CLPs were explored. Their genetic distribution and molecular architecture were analyzed, and their structural and functional diversity in various bacterial genera was examined. The principal roles of computational techniques in understanding bacterial CLPs' structural stability, mechanical properties, and biological functions were also considered. This review serves to drive further interest and development of bacterial CLPs, not only for addressing fundamental biological problems in collagen but also for engineering novel biomaterials. Hence, both biology and materials communities will greatly benefit from intensified research into the diverse structures and functions in bacterial collagen-like proteins.
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Affiliation(s)
- Yimin Qiu
- National Biopesticide Engineering Technology Research Center, Hubei Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Biopesticide Branch of Hubei Innovation Centre of Agricultural Science and Technology, Wuhan 430064, PR China.,State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Chenxi Zhai
- J2 Lab for Engineering Living Materials, Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14850, United States
| | - Ling Chen
- National Biopesticide Engineering Technology Research Center, Hubei Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Biopesticide Branch of Hubei Innovation Centre of Agricultural Science and Technology, Wuhan 430064, PR China
| | - Xiaoyan Liu
- National Biopesticide Engineering Technology Research Center, Hubei Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Biopesticide Branch of Hubei Innovation Centre of Agricultural Science and Technology, Wuhan 430064, PR China
| | - Jingjie Yeo
- J2 Lab for Engineering Living Materials, Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14850, United States
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59
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Abstract
Collagen is the most abundant protein in mammals. A unique feature of collagen is its triple-helical structure formed by the Gly-Xaa-Yaa repeats. Three single chains of procollagen make a trimer, and the triple-helical structure is then folded in the endoplasmic reticulum (ER). This unique structure is essential for collagen's functions in vivo, including imparting bone strength, allowing signal transduction, and forming basement membranes. The triple-helical structure of procollagen is stabilized by posttranslational modifications and intermolecular interactions, but collagen is labile even at normal body temperature. Heat shock protein 47 (Hsp47) is a collagen-specific molecular chaperone residing in the ER that plays a pivotal role in collagen biosynthesis and quality control of procollagen in the ER. Mutations that affect the triple-helical structure or result in loss of Hsp47 activity cause the destabilization of procollagen, which is then degraded by autophagy. In this review, we present the current state of the field regarding quality control of procollagen.
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Affiliation(s)
- Shinya Ito
- Faculty of Life Sciences, Kyoto Sangyo University, Kyoto 603-8555, Japan;
| | - Kazuhiro Nagata
- Faculty of Life Sciences, Kyoto Sangyo University, Kyoto 603-8555, Japan; .,Institute for Protein Dynamics, Kyoto Sangyo University, Kyoto 603-8555, Japan; .,JT Biohistory Research Hall, Osaka, 569-1125, Japan
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60
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Abid U, Gill YQ, Irfan MS, Umer R, Saeed F. Potential applications of polycarbohydrates, lignin, proteins, polyacids, and other renewable materials for the formulation of green elastomers. Int J Biol Macromol 2021; 181:1-29. [PMID: 33744249 DOI: 10.1016/j.ijbiomac.2021.03.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/24/2021] [Accepted: 03/10/2021] [Indexed: 12/18/2022]
Abstract
Renewable resources including polycarbohydrates, lignin, proteins, and polyacids are the intrinsically valuable class of materials that are naturally available in great quantities. Their utilization as green additives and reinforcing bio-fillers, in substitution of environmentally perilous petroleum-based fillers, for developing high-performance green rubber blends and composites is presently a highly tempting option. Blending of these renewable materials with elastomers is not straight-forward and research needs to exploit the high functionality of carbohydrates and other natural materials as proper physicochemical interactions are essential. Correlating and understanding the structural properties of lignin, carbohydrates, polyacids, and other biopolymers, before their incorporation in elastomers, is a potential approach towards the development of green elastomers for value-added applications. Promising properties i.e., biodegradability, biocompatibility, morphological characteristics, high mechanical properties, thermal stability, sustainability, and various other characteristics along with recent advancements in the development of green elastomers are reviewed in this paper. Structures, viability, interactions, properties, and use of most common natural polycarbohydrates (chitosan and starch), lignin, and proteins (collagen and gelatin) for elastomer modification are extensively reviewed. Challenges in commercialization, applications, and future perspectives of green elastomers are also discussed. Sustainability analysis of green elastomers is accomplished to elaborate their cost-effectiveness and environmental friendliness.
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Affiliation(s)
- Umer Abid
- Department of Polymer and Process Engineering, University of Engineering and Technology, G. T. Road, PO Box 54890, Lahore, Pakistan.
| | - Yasir Qayyum Gill
- Department of Polymer and Process Engineering, University of Engineering and Technology, G. T. Road, PO Box 54890, Lahore, Pakistan.
| | - Muhammad Shafiq Irfan
- Department of Polymer and Process Engineering, University of Engineering and Technology, G. T. Road, PO Box 54890, Lahore, Pakistan; Department of Aerospace Engineering, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates.
| | - Rehan Umer
- Department of Aerospace Engineering, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates.
| | - Farhan Saeed
- Department of Polymer and Process Engineering, University of Engineering and Technology, G. T. Road, PO Box 54890, Lahore, Pakistan.
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Wang WM, Yu CH, Chang JY, Chen TH, Chen YC, Sun YT, Wang SH, Jao SC, Cheng RP. Insertion of Pro-Hyp-Gly provides 2 kcal mol -1 stability but attenuates the specific assembly of ABC heterotrimeric collagen triple helices. Org Biomol Chem 2021; 19:1860-1866. [PMID: 33565556 DOI: 10.1039/d0ob02190c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Collagen is a major structural component of the extracellular matrix and connective tissue. The key structural feature of collagen is the collagen triple helix, with a Xaa-Yaa-Gly (glycine) repeating pattern. The most frequently occurring triplet is Pro (proline)-Hyp (hydroxyproline)-Gly. The reversible thermal folding and unfolding of a series of heterotrimeric collagen triple helices with varying number of Pro-Hyp-Gly triplets were monitored by circular dichroism spectroscopy to determine the unfolding thermodynamic parameters Tm (midpoint transition temperature), ΔHTm (unfolding enthalpy), and ΔGunfold (unfolding free energy). The Tm and ΔGunfold of the heterotrimeric collagen triple helices increased with increasing number of Pro-Hyp-Gly triplets. The ΔGunfold increased by 2.0 ± 0.2 kcal mol-1 upon inserting one Pro-Hyp-Gly triplet into all three chains. The Tm difference between the most stable ABC combination and the second most stable BCC combination decreased with increasing number of Pro-Hyp-Gly triplets, even though the ΔGunfold difference remained the same. These results should be useful for tuning the stability of collagen triple helical peptides for hydrogel formation, recognition of denatured collagen triple helices as diagnostics and therapeutics, and targeted drug delivery.
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Affiliation(s)
- Wei-Ming Wang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Chen-Hsu Yu
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Jing-Yuan Chang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Ting-Hsuan Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Yan-Chen Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Yi-Ting Sun
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Szu-Huan Wang
- Department of Academic Affairs and Instrument Service, and Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Shu-Chuan Jao
- Department of Academic Affairs and Instrument Service, and Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Richard P Cheng
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
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Tiwari N, Wegner S, Hassan A, Dwivedi N, Rai R, Sinha N. Probing short and long-range interactions in native collagen inside the bone matrix by BioSolids CryoProbe. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:99-107. [PMID: 32761649 DOI: 10.1002/mrc.5084] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/28/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
Solid-state nuclear magnetic resonance is a promising technique to probe bone mineralization and interaction of collagen protein in the native state. However, many of the developments are hampered due to the low sensitivity of the technique. In this article, we report solid-state nuclear magnetic resonance (NMR) experiments using the newly developed BioSolids CryoProbe™ to access its applicability for elucidating the atomic-level structural details of collagen protein in native state inside the bone. We report here approximately a fourfold sensitivity enhancement in the natural abundance 13 C spectrum compared with the room temperature conventional solid-state NMR probe. With the advantage of sensitivity enhancement, we have been able to perform natural abundance 15 N cross-polarization magic angle spinning (CPMAS) and two-dimensional (2D) 1 H-13 C heteronuclear correlation (HETCOR) experiments of native collagen within a reasonable timeframe. Due to high sensitivity, 2D 1 H/13 C HETCOR experiments have helped in detecting several short and long-range interactions of native collagen assembly, thus significantly expanding the scope of the method to such challenging biomaterials.
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Affiliation(s)
- Nidhi Tiwari
- Centre of Biomedical Research, SGPGIMS Campus, Lucknow, 226014, India
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, 221005, India
| | | | - Alia Hassan
- Bruker BioSpin Corporation, Fällanden, Switzerland
| | - Navneet Dwivedi
- Centre of Biomedical Research, SGPGIMS Campus, Lucknow, 226014, India
- Department of Physics, Integral University, Lucknow, 226026, India
| | - RamaNand Rai
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, 221005, India
| | - Neeraj Sinha
- Centre of Biomedical Research, SGPGIMS Campus, Lucknow, 226014, India
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63
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Martins Cavaco AC, Dâmaso S, Casimiro S, Costa L. Collagen biology making inroads into prognosis and treatment of cancer progression and metastasis. Cancer Metastasis Rev 2021; 39:603-623. [PMID: 32447477 DOI: 10.1007/s10555-020-09888-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Progression through dissemination to tumor-surrounding tissues and metastasis development is a hallmark of cancer that requires continuous cell-to-cell interactions and tissue remodeling. In fact, metastization can be regarded as a tissue disease orchestrated by cancer cells, leading to neoplastic colonization of new organs. Collagen is a major component of the extracellular matrix (ECM), and increasing evidence suggests that it has an important role in cancer progression and metastasis. Desmoplasia and collagen biomarkers have been associated with relapse and death in cancer patients. Despite the increasing interest in ECM and in the desmoplastic process in tumor microenvironment as prognostic factors and therapeutic targets in cancer, further research is required for a better understanding of these aspects of cancer biology. In this review, published evidence correlating collagen with cancer prognosis is retrieved and analyzed, and the role of collagen and its fragments in cancer pathophysiology is discussed.
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Affiliation(s)
- Ana C Martins Cavaco
- Luis Costa Lab, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, 1649-028, Lisboa, Portugal
| | - Sara Dâmaso
- Serviço de Oncologia, Hospital de Santa Maria-CHULN, 1649-028, Lisboa, Portugal
| | - Sandra Casimiro
- Luis Costa Lab, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, 1649-028, Lisboa, Portugal
| | - Luís Costa
- Luis Costa Lab, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, 1649-028, Lisboa, Portugal.
- Serviço de Oncologia, Hospital de Santa Maria-CHULN, 1649-028, Lisboa, Portugal.
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Parisi M, Nanni A, Colonna M. Recycling of Chrome-Tanned Leather and Its Utilization as Polymeric Materials and in Polymer-Based Composites: A Review. Polymers (Basel) 2021; 13:polym13030429. [PMID: 33572866 PMCID: PMC7866253 DOI: 10.3390/polym13030429] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 11/16/2022] Open
Abstract
Tanneries generate large amounts of solid and liquid wastes, which contain harmful chemical compounds in the environment, such as chromium, that is used in the tanning process. Until now, they have been almost completely dumped in landfills. Thus, finding eco-sustainable and innovative alternatives for the management and disposal of these wastes is becoming a huge challenge for tanneries and researchers around the world. In particular, the scientific and industrial communities have started using wastes to produce new materials exploiting the characteristics of leather, which are strongly connected with the macromolecular structure of its main component, collagen. None of the reviews on leather waste management actually present in the scientific literature report in detail the use of leather to make composite materials and the mechanical properties of the materials obtained, which are of fundamental importance for an effective industrial exploitation of leather scraps. This comprehensive review reports for the first time the state of the art of the strategies related to the recovery and valorization of both hydrolyzed collagen and leather waste for the realization of composite materials, reporting in detail the properties and the industrial applications of the materials obtained. In the conclusion section, the authors provide practical implications for industry in relation to sustainability and identify research gaps that can guide future authors and industries in their work.
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Affiliation(s)
| | | | - Martino Colonna
- Correspondence: (M.P.); (M.C.); Tel.: +39-051-20-9-0367 (M.P.)
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65
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Fukuchi M, Oyama K, Mizuno H, Miyagawa A, Koumoto K, Fukuhara G. Hydrostatic Pressure-Regulated Cellular Calcium Responses. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:820-826. [PMID: 33410684 DOI: 10.1021/acs.langmuir.0c03141] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hydrostatic pressure control has attracted much attention and presents a still challenging objective from mechanobiological viewpoints. Herein, we reveal the calcium entry processes in HeLa cells by means of hydrostatic pressure spectroscopy. The steady-state fluorescence spectral data comprehensively elucidated the factors controlling the outcomes of the hydrostatic pressure-stimulated calcium entry behavior. The present work leads to a new perspective on ion regulations in living cells and an attractive alternative to conventional mechanostimuli.
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Affiliation(s)
- Minami Fukuchi
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Kotaro Oyama
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology (QST), 1233 Watanukimachi, Takasaki, Gunma 370-1292, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hiroaki Mizuno
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Akihisa Miyagawa
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Kazuya Koumoto
- Department of Nanobiochemistry, FIRST (Frontiers of Innovative Research in Science and Technology), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Gaku Fukuhara
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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66
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Xu Y, Kirchner M. Collagen Mimetic Peptides. Bioengineering (Basel) 2021; 8:5. [PMID: 33466358 PMCID: PMC7824840 DOI: 10.3390/bioengineering8010005] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/24/2020] [Accepted: 12/31/2020] [Indexed: 12/20/2022] Open
Abstract
Since their first synthesis in the late 1960s, collagen mimetic peptides (CMPs) have been used as a molecular tool to study collagen, and as an approach to develop novel collagen mimetic biomaterials. Collagen, a major extracellular matrix (ECM) protein, plays vital roles in many physiological and pathogenic processes. Applications of CMPs have advanced our understanding of the structure and molecular properties of a collagen triple helix-the building block of collagen-and the interactions of collagen with important molecular ligands. The accumulating knowledge is also paving the way for developing novel CMPs for biomedical applications. Indeed, for the past 50 years, CMP research has been a fast-growing, far-reaching interdisciplinary field. The major development and achievement of CMPs were documented in a few detailed reviews around 2010. Here, we provided a brief overview of what we have learned about CMPs-their potential and their limitations. We focused on more recent developments in producing heterotrimeric CMPs, and CMPs that can form collagen-like higher order molecular assemblies. We also expanded the traditional view of CMPs to include larger designed peptides produced using recombinant systems. Studies using recombinant peptides have provided new insights on collagens and promoted progress in the development of collagen mimetic fibrillar self-assemblies.
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Affiliation(s)
- Yujia Xu
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Ave., New York, NY 10065, USA;
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67
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Wei W, Li D, Cai X, Liu Z, Bai Z, Xiao J. Peptide Probes with Aromatic Residues Tyr and Phe at the X Position Show High Specificity for Targeting Denatured Collagen in Tissues. ACS OMEGA 2020; 5:33075-33082. [PMID: 33403269 PMCID: PMC7774067 DOI: 10.1021/acsomega.0c04684] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
The construction of potent peptide probes for selectively detecting denatured collagen is crucial for a variety of widespread diseases. However, all of the denatured collagen-targeting peptide probes found till date primarily utilized the repetitive (Gly-X-Y) n sequences with exclusively imino acids Pro and Hyp in the X and Y positions, which stabilized the triple helical conformation of the peptide probes, resulting in severe obstacles for their clinical applications. A novel series of peptide probes have been constructed by incorporating nonimino acids at the X position of the (GPO)3GXO(GPO)4 sequence, while the X-site residue is varied as Tyr, Phe, Asp, and Ala, respectively. Peptide probes FAM-GYO and FAM-GFO containing aromatic residues Tyr and Phe at the X position showed similarly high binding affinity and tissue-staining efficacy as the well-established peptide probe FAM-GPO, while peptide probes FAM-GDO and FAM-GAO with the corresponding charged residue Asp and the hydrophobic residue Ala indicated much weaker binding affinity and tissue-staining capability. Furthermore, FAM-GYO and FAM-GFO could specifically detect denatured collagen in different types of mouse connective tissues and efficiently stain various human pathological tissues. We have revealed for the first time that the incorporation of nonimino acids, particularly aromatic residues at the X and Y positions of the repetitive (Gly-X-Y) n sequences, may provide a convenient strategy to create novel robust collagen-targeting peptide probes, which have promising diagnostic applications in collagen-involved diseases.
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Affiliation(s)
- Wenyu Wei
- State Key Laboratory
of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry
and Resources Utilization of Gansu Province, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Dongfang Li
- State Key Laboratory
of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry
and Resources Utilization of Gansu Province, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiangdong Cai
- State Key Laboratory
of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry
and Resources Utilization of Gansu Province, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhao Liu
- State Key Laboratory
of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry
and Resources Utilization of Gansu Province, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhongtian Bai
- The Second Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Jianxi Xiao
- State Key Laboratory
of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry
and Resources Utilization of Gansu Province, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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68
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Proton Conduction via Water Bridges Hydrated in the Collagen Film. J Funct Biomater 2020; 11:jfb11030061. [PMID: 32887392 PMCID: PMC7563757 DOI: 10.3390/jfb11030061] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/12/2020] [Accepted: 09/01/2020] [Indexed: 01/16/2023] Open
Abstract
Collagen films with proton conduction are a candidate of next generation of fuel-cell electrolyte. To clarify a relation between proton conductivity and formation of water networks in the collagen film originating from a tilapia’s scale, we systematically measured the ac conductivity, infrared absorption spectrum, and weight change as a function of relative humidity (RH) at room temperature. The integrated absorbance concerning an O–H stretching mode of water molecules increases above 60% RH in accordance with the weight change. The dc conductivity varies in the vicinity of 60 and 83% RH. From those results, we have determined the dc conductivity vs. hydration number (N) per unit (Gly-X-Y). The proton conduction is negligible in the collagen molecule itself, but dominated by the hydration shell, the development of which is characterized with three regions. For 0 < N < 2, the conductivity is extremely small, because the water molecule in the primary hydration shell has a little hydrogen bonded with each other. For 2 < N < 4, a quasi-one-dimensional proton conduction occurs through intra-water bridges in the helix. For 4 < N, the water molecule fills the helix, and inter-water bridges are formed in between the adjacent helices, so that a proton-conducting network is extended three dimensional.
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69
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Dwivedi KK, Lakhani P, Kumar S, Kumar N. Frequency dependent inelastic response of collagen architecture of pig dermis under cyclic tensile loading: An experimental study. J Mech Behav Biomed Mater 2020; 112:104030. [PMID: 32858398 DOI: 10.1016/j.jmbbm.2020.104030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/06/2020] [Accepted: 08/07/2020] [Indexed: 01/20/2023]
Abstract
The evaluation of collagen architecture of the dermis in response to mechanical stimulation is important as it affects the macroscopic mechanical properties of the dermis. A detailed understanding of the processes involved in the alteration of the collagen structure is required to correlate the mechanical stimulation with tissue remodeling. This study investigated the effect of cyclic frequencies i.e. low (0.1 Hz), medium (2.0 Hz), and high (5.0 Hz) (physiological range) in the alteration of pig dermis collagen structure and its correlation with the macroscopic mechanical response of the dermis. The assessment of the collagen structure of virgin and mechanical tested specimens at tropocollagen, collagen fibril, and fiber level was performed using Fourier-transform infrared-attenuated total reflection (FTIR-ATR), atomic force microscopy (AFM), and scanning electron microscopy (SEM) respectively. After 103 cycles, a significantly higher alteration in collagen structure with discrete plastic-type damage was found for low frequency. This frequency dependent alteration of the collagen structure was found in correlation with the dermis macroscopic response. The value of inelastic strain, stress softening, damage parameter (reduction in elastic modulus), and reduction in energy dissipation were observed significantly large for slow frequency. A power-law based empirical relations, as a function of frequency and number of cycles, were proposed to predict the value of inelastic strain and damage parameter. This study also suggests that hierarchical structural response against the mechanical stimulation is time-dependent rather than cycle-dependent, may affect the tissue remodeling.
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Affiliation(s)
| | | | - Sachin Kumar
- Department of Mechanical Engineering, IIT, Ropar, India.
| | - Navin Kumar
- Center for Biomedical Engineering Department, IIT, Ropar, India; Department of Mechanical Engineering, IIT, Ropar, India.
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70
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Hulgan SAH, Jalan AA, Li IC, Walker DR, Miller MD, Kosgei AJ, Xu W, Phillips GN, Hartgerink JD. Covalent Capture of Collagen Triple Helices Using Lysine–Aspartate and Lysine–Glutamate Pairs. Biomacromolecules 2020; 21:3772-3781. [DOI: 10.1021/acs.biomac.0c00878] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sarah A. H. Hulgan
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Abhishek A. Jalan
- Department of Biochemistry, University of Bayreuth, Bayreuth 95447, Germany
| | - I-Che Li
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Douglas R. Walker
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Mitchell D. Miller
- Department of Biosciences, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Abigael J. Kosgei
- Department of Biosciences, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Weijun Xu
- Department of Biosciences, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - George N. Phillips
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Biosciences, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Jeffrey D. Hartgerink
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Bioengineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
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71
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Bourgot I, Primac I, Louis T, Noël A, Maquoi E. Reciprocal Interplay Between Fibrillar Collagens and Collagen-Binding Integrins: Implications in Cancer Progression and Metastasis. Front Oncol 2020; 10:1488. [PMID: 33014790 PMCID: PMC7461916 DOI: 10.3389/fonc.2020.01488] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 07/13/2020] [Indexed: 12/14/2022] Open
Abstract
Cancers are complex ecosystems composed of malignant cells embedded in an intricate microenvironment made of different non-transformed cell types and extracellular matrix (ECM) components. The tumor microenvironment is governed by constantly evolving cell-cell and cell-ECM interactions, which are now recognized as key actors in the genesis, progression and treatment of cancer lesions. The ECM is composed of a multitude of fibrous proteins, matricellular-associated proteins, and proteoglycans. This complex structure plays critical roles in cancer progression: it functions as the scaffold for tissues organization and provides biochemical and biomechanical signals that regulate key cancer hallmarks including cell growth, survival, migration, differentiation, angiogenesis, and immune response. Cells sense the biochemical and mechanical properties of the ECM through specialized transmembrane receptors that include integrins, discoidin domain receptors, and syndecans. Advanced stages of several carcinomas are characterized by a desmoplastic reaction characterized by an extensive deposition of fibrillar collagens in the microenvironment. This compact network of fibrillar collagens promotes cancer progression and metastasis, and is associated with low survival rates for cancer patients. In this review, we highlight how fibrillar collagens and their corresponding integrin receptors are modulated during cancer progression. We describe how the deposition and alignment of collagen fibers influence the tumor microenvironment and how fibrillar collagen-binding integrins expressed by cancer and stromal cells critically contribute in cancer hallmarks.
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Affiliation(s)
| | | | | | | | - Erik Maquoi
- Laboratory of Tumor and Development Biology, GIGA-Cancer, University of Liège, Liège, Belgium
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72
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Zhang X, Xu S, Shen L, Li G. Factors affecting thermal stability of collagen from the aspects of extraction, processing and modification. JOURNAL OF LEATHER SCIENCE AND ENGINEERING 2020. [DOI: 10.1186/s42825-020-00033-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Abstract
Collagen, as a thermal-sensitive protein, is the most abundant structural protein in animals. Native collagen has been widely applied in various fields due to its specific physicochemical and biological properties. The beneficial properties would disappear with the collapse of the unique triple helical structure during heating. Understanding thermal stability of collagen is of great significance for practical applications. Previous studies have shown the thermal stability would be affected by the different sources, extraction methods, solvent systems in vitro and modified methods. Accordingly, the factors affecting thermal stability of collagen are discussed in detail in this review.
Graphical abstract
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73
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Marine collagen and its derivatives: Versatile and sustainable bio-resources for healthcare. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 113:110963. [DOI: 10.1016/j.msec.2020.110963] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 04/06/2020] [Accepted: 04/11/2020] [Indexed: 02/07/2023]
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74
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Suzuki H, Mahapatra D, Board AJ, Steel PJ, Dyer JM, Gerrard JA, Dobson RCJ, Valéry C. Sub-Ångstrom structure of collagen model peptide (GPO) 10 shows a hydrated triple helix with pitch variation and two proline ring conformations. Food Chem 2020; 319:126598. [PMID: 32182540 DOI: 10.1016/j.foodchem.2020.126598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 02/18/2020] [Accepted: 03/10/2020] [Indexed: 11/17/2022]
Abstract
Collagens are large structural proteins that are prevalent in mammalian connective tissue. Peptides designed to include a glycine-proline-hydroxyproline (GPO) amino acid triad are biomimetic analogs of the collagen triple helix, a fold that is a hallmark of collagen-like sequences. To inform the rational engineering of collagen-like peptides and proteins for food systems, we report the crystal structure of the (GPO)10 peptide at 0.89-Å resolution, solved using direct methods. We determined that a single chain in the asymmetric unit forms a pseudo-hexagonal network of triple helices that have a pitch variation consistent with the model 7/2 helix (3.5 residues per turn). The proline rings occupied one of two states, while the helix was found to have a well-defined hydration shell involved in the stabilization of the inter-helix crystal network. This structure offers a new high-resolution basis for understanding the hierarchical assembly of native collagens, which will aid the food industry in engineering new sustainable food systems.
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Affiliation(s)
- Hironori Suzuki
- Biomolecular Interaction Centre, University of Canterbury, Christchurch, New Zealand
| | - Deepti Mahapatra
- Biomolecular Interaction Centre, University of Canterbury, Christchurch, New Zealand; AgResearch Ltd, Lincoln, New Zealand
| | - Amanda J Board
- Biomolecular Interaction Centre, University of Canterbury, Christchurch, New Zealand; Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Peter J Steel
- Chemistry Department, University of Canterbury, Christchurch, New Zealand
| | - Jolon M Dyer
- Biomolecular Interaction Centre, University of Canterbury, Christchurch, New Zealand; AgResearch Ltd, Lincoln, New Zealand; Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Juliet A Gerrard
- Biomolecular Interaction Centre, University of Canterbury, Christchurch, New Zealand; School of Biological Sciences and School of Chemical Sciences, University of Auckland, Auckland, New Zealand; Riddet Institute, Massey University, Palmerston North, New Zealand; Callaghan Innovation Research Limited, Lower Hutt, New Zealand
| | - Renwick C J Dobson
- Biomolecular Interaction Centre, University of Canterbury, Christchurch, New Zealand; Riddet Institute, Massey University, Palmerston North, New Zealand; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Victoria, Australia.
| | - Céline Valéry
- Biomolecular Interaction Centre, University of Canterbury, Christchurch, New Zealand; School of Medical Sciences, RMIT University, Bundoora, Victoria, Australia.
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75
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Stewart AN, Little HC, Clark DJ, Zhang H, Wong GW. Protein Modifications Critical for Myonectin/Erythroferrone Secretion and Oligomer Assembly. Biochemistry 2020; 59:2684-2697. [PMID: 32602701 DOI: 10.1021/acs.biochem.0c00461] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Myonectin/erythroferrone (also known as CTRP15) is a secreted hormone with metabolic function and a role in stress erythropoiesis. Despite its importance in physiologic processes, biochemical characterization of the protein is lacking. Here, we show that multiple protein modifications are critical for myonectin secretion and multimerization. Abolishing N-linked glycosylation by tunicamycin, glucosamine supplementation, or glutamine substitutions of all four potential Asn glycosylation sites blocked myonectin secretion. Mass spectrometry confirmed that Asn-229 and Asn-281 were glycosylated, and substituting both Asn sites with Gln prevented myonectin secretion. Although Asn-319 is not identified as glycosylated, Gln substitution caused protein misfolding and retention in the endoplasmic reticulum. Of the four conserved cysteines, Cys-273 and Cys-278 were required for proper protein folding; Ala substitution of either site inhibited protein secretion. In contrast, Ala substitutions of Cys-142, Cys-194, or both markedly enhanced protein secretion, suggesting endoplasmic reticulum retention that facilitates myonectin oligomer assembly. Secreted myonectin consists of trimers, hexamers, and high-molecular weight (HMW) oligomers. The formation of higher-order structures via intermolecular disulfide bonds depended on Cys-142 and Cys-194; while the C142A mutant formed almost exclusively trimers, the C194A mutant was impaired in HMW oligomer formation. Most Pro residues within the short collagen domain of myonectin were also hydroxylated, a modification that stabilized the collagen triple helix. Inhibiting Pro hydroxylation or deleting the collagen domain markedly reduced the rate of protein secretion. Together, our results reveal key determinants that are important for myonectin folding, secretion, and multimeric assembly and provide a basis for future structure-function studies.
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Affiliation(s)
- Ashley N Stewart
- Department of Physiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Hannah C Little
- Department of Physiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - David J Clark
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Hui Zhang
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - G William Wong
- Department of Physiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
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76
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First reported case of Steel syndrome in the European population: A novel homozygous mutation in COL27A1 and review of the literature. Eur J Med Genet 2020; 63:103939. [DOI: 10.1016/j.ejmg.2020.103939] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/19/2020] [Accepted: 04/23/2020] [Indexed: 01/01/2023]
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77
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78
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Glycosaminoglycans accelerate biomimetic collagen mineralization in a tissue-based in vitro model. Proc Natl Acad Sci U S A 2020; 117:12636-12642. [PMID: 32461359 DOI: 10.1073/pnas.1914899117] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Mammalian teeth are attached to the jawbone through an exquisitely controlled mineralization process: unmineralized collagen fibers of the periodontal ligament anchor directly into the outer layer of adjoining mineralized tissues (cementum and bone). The sharp interface between mineralized and nonmineralized collagenous tissues makes this an excellent model to study the mechanisms by which extracellular matrix macromolecules control collagen mineralization. While acidic phosphoproteins, localized in the mineralized tissues, play key roles in control of mineralization, the role of glycosaminoglycans (GAGs) is less clear. As several proteoglycans are found only in the periodontal ligament, it has been hypothesized that these inhibit mineralization of collagen in this tissue. Here we used an in vitro model based on remineralization of mouse dental tissues to determine the role of matrix GAGs in control of mineralization. GAGs were selectively removed from demineralized mouse periodontal sections via enzymatic digestion. Proteomic analysis confirmed that enzymatic GAG removal does not significantly alter protein content. Analysis of remineralized tissue sections by transmission electron microscopy (TEM) shows that GAG removal reduced the rate of remineralization in mineralized tissues compared to the untreated control, while the ligament remained unmineralized. Protein removal with trypsin also reduced the rate of mineralization, but to a lesser extent than GAG removal, despite a much larger effect on protein content. These results indicate that GAGs promote mineralization in mineralized dental tissues rather than inhibiting mineral formation in the ligament, which may have broader implications for understanding control of collagen mineralization in connective tissues.
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79
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Chen F, Strawn R, Xu Y. The predominant roles of the sequence periodicity in the self-assembly of collagen-mimetic mini-fibrils. Protein Sci 2020; 28:1640-1651. [PMID: 31299125 PMCID: PMC6699095 DOI: 10.1002/pro.3679] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 06/29/2019] [Accepted: 07/03/2019] [Indexed: 11/10/2022]
Abstract
Collagen fibrils represent a unique case of protein folding and self‐association. We have recently successfully developed triple‐helical peptides that can further self‐assemble into collagen‐mimetic mini‐fibrils. The 35 nm axially repeating structure of the mini‐fibrils, which is designated the d‐period, is highly reminiscent of the well‐known 67 nm D‐period of native collagens when examined using TEM and atomic force spectroscopy. We postulate that it is the pseudo‐identical repeating sequence units in the primary structure of the designed peptides that give rise to the d‐period of the quaternary structure of the mini‐fibrils. In this work, we characterize the self‐assembly of two additional designed peptides: peptide Col877 and peptide Col108rr. The triple‐helix domain of Col877 consists of three pseudo‐identical amino acid sequence units arranged in tandem, whereas that of Col108rr consists of three sequence units identical in amino acid composition but different in sequence. Both peptides form stable collagen triple helices, but only triple helices Col877 self‐associate laterally under fibril forming conditions to form mini‐fibrils having the predicted d‐period. The Co108rr triple helices, however, only form nonspecific aggregates having no identifiable structural features. These results further accentuate the critical involvement of the repeating sequence units in the self‐assembly of collagen mini‐fibrils; the actual amino acid sequence of each unit has only secondary effects. Collagen is essential for tissue development and function. This novel approach to creating collagen‐mimetic fibrils can potentially impact fundamental research and have a wide range of biomedical and industrial applications.
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Affiliation(s)
- Fangfang Chen
- Department of Biologics, Frontage Laboratories, Exton, Pennsylvania
| | | | - Yujia Xu
- Department of Chemistry, Hunter College of the City University of New York, New York, New York
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80
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Maaßen A, Gebauer JM, Theres Abraham E, Grimm I, Neudörfl J, Kühne R, Neundorf I, Baumann U, Schmalz H. Triple‐Helix‐Stabilizing Effects in Collagen Model Peptides Containing PPII‐Helix‐Preorganized Diproline Modules. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andreas Maaßen
- University of Cologne Department of Chemistry Greinstraße 4 50939 Cologne Germany
| | - Jan M. Gebauer
- University of Cologne Department of Chemistry Zülpicher Straße 47a 50674 Cologne Germany
| | - Elena Theres Abraham
- University of Cologne Department of Chemistry Zülpicher Straße 47a 50674 Cologne Germany
| | - Isabelle Grimm
- University of Cologne Department of Chemistry Greinstraße 4 50939 Cologne Germany
| | - Jörg‐Martin Neudörfl
- University of Cologne Department of Chemistry Greinstraße 4 50939 Cologne Germany
| | - Ronald Kühne
- Leibniz-Institut für Molekulare Pharmakologie (FMP) Campus Berlin-Buch Robert-Rössle-Straße 10 13125 Berlin Germany
| | - Ines Neundorf
- University of Cologne Department of Chemistry Zülpicher Straße 47a 50674 Cologne Germany
| | - Ulrich Baumann
- University of Cologne Department of Chemistry Zülpicher Straße 47a 50674 Cologne Germany
| | - Hans‐Günther Schmalz
- University of Cologne Department of Chemistry Greinstraße 4 50939 Cologne Germany
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81
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Maaßen A, Gebauer JM, Theres Abraham E, Grimm I, Neudörfl J, Kühne R, Neundorf I, Baumann U, Schmalz H. Triple-Helix-Stabilizing Effects in Collagen Model Peptides Containing PPII-Helix-Preorganized Diproline Modules. Angew Chem Int Ed Engl 2020; 59:5747-5755. [PMID: 31944532 PMCID: PMC7154665 DOI: 10.1002/anie.201914101] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Indexed: 02/02/2023]
Abstract
Collagen model peptides (CMPs) serve as tools for understanding stability and function of the collagen triple helix and have a potential for biomedical applications. In the past, interstrand cross-linking or conformational preconditioning of proline units through stereoelectronic effects have been utilized in the design of stabilized CMPs. To further study the effects determining collagen triple helix stability we investigated a series of CMPs containing synthetic diproline-mimicking modules (ProMs), which were preorganized in a PPII-helix-type conformation by a functionalizable intrastrand C2 bridge. Results of CD-based denaturation studies were correlated with calculated (DFT) conformational preferences of the ProM units, revealing that the relative helix stability is mainly governed by an interplay of main-chain preorganization, ring-flip preference, adaptability, and steric effects. Triple helix integrity was proven by crystal structure analysis and binding to HSP47.
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Affiliation(s)
- Andreas Maaßen
- University of CologneDepartment of ChemistryGreinstraße 450939CologneGermany
| | - Jan M. Gebauer
- University of CologneDepartment of ChemistryZülpicher Straße 47a50674CologneGermany
| | - Elena Theres Abraham
- University of CologneDepartment of ChemistryZülpicher Straße 47a50674CologneGermany
| | - Isabelle Grimm
- University of CologneDepartment of ChemistryGreinstraße 450939CologneGermany
| | | | - Ronald Kühne
- Leibniz-Institut für Molekulare Pharmakologie (FMP)Campus Berlin-BuchRobert-Rössle-Straße 1013125BerlinGermany
| | - Ines Neundorf
- University of CologneDepartment of ChemistryZülpicher Straße 47a50674CologneGermany
| | - Ulrich Baumann
- University of CologneDepartment of ChemistryZülpicher Straße 47a50674CologneGermany
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82
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Aronoff MR, Egli J, Schmitt A, Wennemers H. Alkylation of γ‐Azaproline Creates Conformationally Adaptable Proline Derivatives for pH‐Responsive Collagen Triple Helices. Chemistry 2020; 26:5070-5074. [DOI: 10.1002/chem.201905768] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Matthew R. Aronoff
- Laboratory of Organic ChemistryETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Jasmine Egli
- Laboratory of Organic ChemistryETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Adeline Schmitt
- Laboratory of Organic ChemistryETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Helma Wennemers
- Laboratory of Organic ChemistryETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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83
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Snider C, Bellrichard M, Meyer A, Kannan R, Grant D, Grant S. A novel crosslinker-free technique toward the fabrication of collagen microspheres. J Biomed Mater Res B Appl Biomater 2020; 108:2789-2798. [PMID: 32190977 DOI: 10.1002/jbm.b.34608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 02/10/2020] [Accepted: 03/08/2020] [Indexed: 11/09/2022]
Abstract
Injectable collagen microspheres (CMs) have the potential to be an excellent tool to deliver various modulatory agents or to be used as a cellular transporter. A drawback has been the difficulty in producing reliable and spherical CMs. A crosslinker-free method to fabricate CMs was developed using liquid collagen (LC) in a water-in-oil emulsion process with varying concentrations of surfactant span-80. Different emulsion times of up to 16-hr were utilized to produce the CMs. Visual microscopy and scanning electron microscopy were utilized to determine the morphology of the CMs. To determine the fibril nature of the CMs, focus ion beam milling, energy dispersive spectroscopy, and Fourier Transformation-Infrared spectroscopy were performed. A cell biocompatibility study was performed to assess the biocompatibility of the CMs. The results demonstrated that consistent spherical CMs were achievable by changing the span-80 concentration. The CMs were fibrilized not only at the surface, but also at the core. Both the 1- and 16-hr emulsion time demonstrated biocompatibility and it appeared that the cells preferentially adhered to the CMs. This crosslinker-free method to fabricate CMs resulted in spherical, stable, biocompatible CMs, and could be an excellent technique for multiple tissue engineering applications.
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Affiliation(s)
- Colten Snider
- Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, Missouri, USA
| | - Mitch Bellrichard
- Department of Veterinary Pathology, University of Missouri, Columbia, Missouri, USA
| | - Amber Meyer
- Department of Materials Science and Engineering, Missouri University Science & Technology, Rolla, Missouri, USA
| | - Raghuraman Kannan
- Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, Missouri, USA.,Department of Radiology, University of Missouri, Columbia, Missouri, USA
| | - Dave Grant
- Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, Missouri, USA
| | - Sheila Grant
- Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, Missouri, USA
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84
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Salarian M, Ibhagui OY, Yang JJ. Molecular imaging of extracellular matrix proteins with targeted probes using magnetic resonance imaging. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2020; 12:e1622. [PMID: 32126587 DOI: 10.1002/wnan.1622] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 01/04/2020] [Accepted: 02/04/2020] [Indexed: 12/14/2022]
Abstract
The extracellular matrix (ECM) consists of proteins and carbohydrates that supports different biological structures and processes such as tissue development, elasticity, and preservation of organ structure. Diseases involving inflammation, fibrosis, tumor invasion, and injury are all attributed to the transition of the ECM from homeostasis to remodeling, which can significantly change the biochemical and biomechanical features of ECM components. While contrast agents have played an indispensable role in facilitating clinical diagnosis of diseases using magnetic resonance imaging (MRI), there is a strong need to develop novel biomarker-targeted imaging probes for in vivo visualization of biological processes and pathological alterations at a cellular and molecular level, for both early diagnosis and monitoring drug treatment. Herein, we will first review the pathological accumulation and characterization of ECM proteins recognized as important molecular features of diseases. Developments in MRI probes targeting ECM proteins such as collagen, fibronectin, and elastin via conjugation of existing contrast agents to targeting moieties and their applications to various diseases, are also reviewed. We have also reviewed our progress in the development of collagen-targeted protein MRI contrast agent with significant improvement in relaxivity and metal binding specificity, and their applications in early detection of fibrosis and metastatic cancer. This article is categorized under: Diagnostic Tools > in vivo Nanodiagnostics and Imaging Biology-Inspired Nanomaterials > Peptide-Based Structures Biology-Inspired Nanomaterials > Protein and Virus-Based Structures.
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Affiliation(s)
- Mani Salarian
- Department of Chemistry, Georgia State University, Atlanta, Georgia
| | | | - Jenny J Yang
- Department of Chemistry, Georgia State University, Atlanta, Georgia.,Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, Georgia
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85
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Jo YK, Lee D. Biopolymer Microparticles Prepared by Microfluidics for Biomedical Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1903736. [PMID: 31559690 DOI: 10.1002/smll.201903736] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 08/31/2019] [Indexed: 06/10/2023]
Abstract
Biopolymers are macromolecules that are derived from natural sources and have attractive properties for a plethora of biomedical applications due to their biocompatibility, biodegradability, low antigenicity, and high bioactivity. Microfluidics has emerged as a powerful approach for fabricating polymeric microparticles (MPs) with designed structures and compositions through precise manipulation of multiphasic flows at the microscale. The synergistic combination of materials chemistry afforded by biopolymers and precision provided by microfluidic capabilities make it possible to design engineered biopolymer-based MPs with well-defined physicochemical properties that are capable of enabling an efficient delivery of therapeutics, 3D culture of cells, and sensing of biomolecules. Here, an overview of microfluidic approaches is provided for the design and fabrication of functional MPs from three classes of biopolymers including polysaccharides, proteins, and microbial polymers, and their advances for biomedical applications are highlighted. An outlook into the future research on microfluidically-produced biopolymer MPs for biomedical applications is also provided.
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Affiliation(s)
- Yun Kee Jo
- Department of Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Daeyeon Lee
- Department of Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, 19104, USA
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86
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Yeo J, Qiu Y, Jung GS, Zhang YW, Buehler MJ, Kaplan DL. Adverse effects of Alport syndrome-related Gly missense mutations on collagen type IV: Insights from molecular simulations and experiments. Biomaterials 2020; 240:119857. [PMID: 32085975 DOI: 10.1016/j.biomaterials.2020.119857] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 01/28/2020] [Accepted: 02/08/2020] [Indexed: 12/13/2022]
Abstract
Patients with Alport syndrome (AS) exhibit blood and elevated protein levels in their urine, inflamed kidneys, and many other abnormalities. AS is attributed to mutations in type IV collagen genes, particularly glycine missense mutations in the collagenous domain of COL4A5 that disrupt common structural motifs in collagen from the repeat (Gly-Xaa-Yaa)n amino acid sequence. To characterize and elucidate the molecular mechanisms underlying how AS-related mutations perturb the structure and function of type IV collagen, experimental studies and molecular simulations were integrated to investigate the structure, stability, protease sensitivity, and integrin binding affinity of collagen-like proteins containing amino acid sequences from the α5(IV) chain and AS-related Gly missense mutations. We show adverse effects where (i) three AS-related Gly missense mutations significantly reduced the structural stability of the collagen in terms of decreased melting temperatures and calorimetric enthalpies, in conjunction with a collective drop in the external work needed to unfold the peptides containing mutation sequences; (ii) due to local unwinding around the sites of mutations, these triple helical peptides were also degraded more rapidly by trypsin and chymotrypsin, as these enzymes could access the collagenous triple helix more easily and increase the number of contacts; (iii) the mutations further abolished the ability of the recombinant collagens to bind to integrins and greatly reduced the binding affinities between collagen and integrins, thus preventing cells from adhering to these mutants. Our unified experimental and computational approach provided underlying insights needed to guide potential therapies for AS that ameliorate the adverse effects from AS disease onset and progression.
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Affiliation(s)
- Jingjie Yeo
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA; Laboratory for Atomistic and Molecular Mechanics (LAMM), Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Institute of High Performance Computing, A*STAR, 1 Fusionopolis Way, Singapore 138632, Singapore; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Yimin Qiu
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA; National Biopesticide Engineering Technology Research Center, Hubei Biopesticide Engineering Research Center, Hubei Academy of Agricultural Sciences, Biopesticide Branch of Hubei Innovation Centre of Agricultural Science and Technology, Wuhan, 430064, PR China
| | - Gang Seob Jung
- Laboratory for Atomistic and Molecular Mechanics (LAMM), Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yong-Wei Zhang
- Institute of High Performance Computing, A*STAR, 1 Fusionopolis Way, Singapore 138632, Singapore
| | - Markus J Buehler
- Laboratory for Atomistic and Molecular Mechanics (LAMM), Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA.
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87
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Hentzen NB, Islami V, Köhler M, Zenobi R, Wennemers H. A Lateral Salt Bridge for the Specific Assembly of an ABC-Type Collagen Heterotrimer. J Am Chem Soc 2020; 142:2208-2212. [DOI: 10.1021/jacs.9b13037] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Nina B. Hentzen
- Laboratory of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093, Zurich, Switzerland
| | - Valdrin Islami
- Laboratory of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093, Zurich, Switzerland
| | - Martin Köhler
- Laboratory of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093, Zurich, Switzerland
| | - Renato Zenobi
- Laboratory of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093, Zurich, Switzerland
| | - Helma Wennemers
- Laboratory of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093, Zurich, Switzerland
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88
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Gaar J, Naffa R, Brimble M. Enzymatic and non-enzymatic crosslinks found in collagen and elastin and their chemical synthesis. Org Chem Front 2020. [DOI: 10.1039/d0qo00624f] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
This review summarized the enzymatic and non-enzymatic crosslinks found in collagen and elastin and their organic synthesis.
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Affiliation(s)
- Jakob Gaar
- School of Chemical Sciences
- The University of Auckland
- Auckland Central 1010
- New Zealand
- The Maurice Wilkins Centre for Molecular Biodiscovery
| | - Rafea Naffa
- New Zealand Leather and Shoe Research Association
- Palmerston North
- New Zealand
| | - Margaret Brimble
- School of Chemical Sciences
- The University of Auckland
- Auckland Central 1010
- New Zealand
- The Maurice Wilkins Centre for Molecular Biodiscovery
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89
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Sun M, Wei X, Wang H, Xu C, Wei B, Zhang J, He L, Xu Y, Li S. Structure Restoration of Thermally Denatured Collagen by Ultrahigh Pressure Treatment. FOOD BIOPROCESS TECH 2019. [DOI: 10.1007/s11947-019-02389-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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90
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Falk MJ, Duwel A, Colwell LJ, Brenner MP. Collagen-Inspired Self-Assembly of Twisted Filaments. PHYSICAL REVIEW LETTERS 2019; 123:238102. [PMID: 31868483 DOI: 10.1103/physrevlett.123.238102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 09/27/2019] [Indexed: 06/10/2023]
Abstract
Collagen consists of three peptides twisted together through a periodic array of hydrogen bonds. Here we use this as inspiration to find design rules for programmed specific interactions for self-assembling synthetic collagenlike triple helices, starting from disordered configurations. The assembly generically nucleates defects in the triple helix, the characteristics of which can be manipulated by spatially varying the enthalpy of helix formation. Defect formation slows assembly, evoking kinetic pathologies that have been observed to mutations in the primary collagen amino acid sequence. The controlled formation and interaction between defects gives a route for hierarchical self-assembly of bundles of twisted filaments.
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Affiliation(s)
- Martin J Falk
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02138, USA
| | - Amy Duwel
- Charles Stark Draper Laboratory, Cambridge, Massachusetts 02138, USA
| | - Lucy J Colwell
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Michael P Brenner
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
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91
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Shu F, Dai C, Wang H, Xu C, Wie B, Zhang J, Xu Y, He L, Li S. Formation, Stability and Self‐Assembly Behaviour of the Collagen‐Like Triple Helix Confirmation: The Role of Ser, Ala and Arg/Glu. ChemistrySelect 2019. [DOI: 10.1002/slct.201903500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Feiyi Shu
- School of Chemistry and Environmental EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
| | - Chun Dai
- School of Food Science and EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
| | - Haibo Wang
- School of Chemistry and Environmental EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
| | - Chengzhi Xu
- School of Chemistry and Environmental EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
| | - Benmei Wie
- School of Chemistry and Environmental EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
| | - Juntao Zhang
- School of Chemistry and Environmental EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
| | - Yuling Xu
- School of Chemistry and Environmental EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
| | - Lang He
- School of Chemistry and Environmental EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
| | - Sheng Li
- School of Chemistry and Environmental EngineeringWuhan Polytechnic University, Changqing Garden, Wuhan, Hubei China
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92
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Kirkness MWH, Lehmann K, Forde NR. Mechanics and structural stability of the collagen triple helix. Curr Opin Chem Biol 2019; 53:98-105. [DOI: 10.1016/j.cbpa.2019.08.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/24/2019] [Accepted: 08/12/2019] [Indexed: 01/18/2023]
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93
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More SH, Ganesh KN. Spiegelmeric 4
R
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S
‐hydroxy/amino‐L/D‐prolyl collagen peptides: conformation and morphology of self‐assembled structures. Pept Sci (Hoboken) 2019. [DOI: 10.1002/pep2.24140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Shahaji H More
- Chemistry DepartmentIndian Institute of Science Education and Research Pune Pune India
| | - Krishna N Ganesh
- Chemistry DepartmentIndian Institute of Science Education and Research Pune Pune India
- Department of ChemistryIndian Institute of Science Education and Research Tirupati Tirupati Andhra Pradesh India
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94
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Egli J, Schnitzer T, Dietschreit JCB, Ochsenfeld C, Wennemers H. Why Proline? Influence of Ring-Size on the Collagen Triple Helix. Org Lett 2019; 22:348-351. [DOI: 10.1021/acs.orglett.9b03528] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jasmine Egli
- Laboratory of Organic Chemistry, ETH Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
| | - Tobias Schnitzer
- Laboratory of Organic Chemistry, ETH Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
| | - Johannes C. B. Dietschreit
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich, Butenandtstr. 7, 81377 Munich, Germany
| | - Christian Ochsenfeld
- Chair of Theoretical Chemistry, Department of Chemistry, University of Munich, Butenandtstr. 7, 81377 Munich, Germany
| | - Helma Wennemers
- Laboratory of Organic Chemistry, ETH Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
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95
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Leroux R, Ringenbach C, Marchand T, Peschard O, Mondon P, Criton P. A new matrikine-derived peptide up-regulates longevity genes for improving extracellular matrix architecture and connections of dermal cell with its matrix. Int J Cosmet Sci 2019; 42:53-59. [PMID: 31596957 DOI: 10.1111/ics.12584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 09/30/2019] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Skin extracellular matrix (ECM) is a dense and well-organized structure produced by fibroblasts. This ECM transduces environmental mechano-signals to cell nucleus through the integrin-actin complex, thus triggering ECM protein syntheses. The aim of this study was to discover a novel peptide, structurally related to dermal matrikines, that promotes syntheses of ECM components. METHODS AND RESULTS Screening tests with 120 peptides were carried out by using normal dermal human fibroblasts (HF). As a result, one candidate of interest was isolated, the N-Prolyl Palmitoyl Tripeptide-56 Acetate (PP56), which increases collagen and fibronectin productions at gene and/or protein levels. Using liquid chromatography-tandem mass spectrometry (LC-MS/MS), a recent and innovative analytical technology, in addition to more traditional techniques, it was showed that two metabolic pathways were significantly modulated: one for collagen production and one for actin. Moreover, this peptide up-regulated the transcription of Forkhead Box O (FOXO) and sestrin messenger RNAs (mRNA), leading to production of proteins involved into longevity and more recently in collagen production. RESULTS Results indicated that this peptide is a potential candidate to improve ECM density and organization in a new way.
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Affiliation(s)
- R Leroux
- SEDERMA, 29 rue du Chemin Vert, 78612, Le Perray-en-Yvelines cedex, France
| | - C Ringenbach
- SEDERMA, 29 rue du Chemin Vert, 78612, Le Perray-en-Yvelines cedex, France
| | - T Marchand
- SEDERMA, 29 rue du Chemin Vert, 78612, Le Perray-en-Yvelines cedex, France
| | - O Peschard
- SEDERMA, 29 rue du Chemin Vert, 78612, Le Perray-en-Yvelines cedex, France
| | - P Mondon
- SEDERMA, 29 rue du Chemin Vert, 78612, Le Perray-en-Yvelines cedex, France
| | - P Criton
- SEDERMA, 29 rue du Chemin Vert, 78612, Le Perray-en-Yvelines cedex, France
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96
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Sethuraman S, Rajendran K. Is Gum Arabic a Good Emulsifier Due to CH...π Interactions? How Urea Effectively Destabilizes the Hydrophobic CH...π Interactions in the Proteins of Gum Arabic than Amides and GuHCl? ACS OMEGA 2019; 4:16418-16428. [PMID: 31616820 PMCID: PMC6787882 DOI: 10.1021/acsomega.9b01980] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 09/11/2019] [Indexed: 05/13/2023]
Abstract
The photophysical studies of gum arabic (GA) in the presence of urea, 1,3-dimethylurea (DMU), tetramethylurea (TMU), guanidine hydrochloride (GuHCl), formamide (FA), acetamide (AA), and dimethyl formamide (DMF) were carried out by monitoring the emission, three-dimensional emission contour, and time-correlated fluorescence lifetime techniques. On addition of only 1 × 10-3 M urea, 75.0% of the fluorescence of GA is quenched, while the same occurs in GuHCl at 3.0 M. FA quenched 50% of the fluorescence of GA at 5.0 M. However, DMU, TMU, AA, and DMF resulted in a fluorescence enhancement. The unusual fluorescence trends reveal the existence of CH...π interactions in the proteins of GA. The experimental results and the structural aspects of proteins in GA led us to propose that the aggregation of polyproline helices in GA, through several CH...π interactions, would have a major role to play in the emulsification mechanism of GA.
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97
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Sun X, He M, Wang L, Luo L, Wang J, Xiao J. Luminescent Biofunctional Collagen Mimetic Nanofibers. ACS OMEGA 2019; 4:16270-16279. [PMID: 31616804 PMCID: PMC6787889 DOI: 10.1021/acsomega.9b00740] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Accepted: 07/19/2019] [Indexed: 06/10/2023]
Abstract
Collagen has long been one of the top targets for biomimetic design due to its superior structural and functional properties. Significant progress has been achieved to construct self-assembling peptides to mimic the fibrous nanostructure of native collagen, while it is still very demanding to fabricate peptide assemblies that can recapitulate both structural and biofunctional features of collagen. Herein, collagen-like peptides have been synthesized to contain negatively charged amino acids as the binding groups of lanthanide ions and the integrin-binding motif GFOGER. The simultaneous inclusion of negatively charged amino acids in the middle as well as at both terminals drives the peptides to self-assemble to form well-ordered nanofibers with distinct periodic banding patterns specifically mediated by lanthanide ions. The aggregation tendency and the morphology of the final assembled materials for the peptides are modulated in a pH-cooperative manner, which well mimics the pH-dependent fibrillogenesis of Type I collagen. The utilization of lanthanide ions in the system not only offers a convenient external stimulus but also functionalizes assembled materials with excellent luminescent features. Most notably, the lanthanide-triggered peptide assembled nanomaterials possess good cell adhesion properties, which resemble the biological function of collagen. This peptide-Ln3+ system provides a facile and potent strategy to generate nanofibers that mimic both the structural and functional properties of natural collagen. These novel pH-responsive, luminescent, and biofunctional collagen mimetic nanofibers open fascinating opportunities in the development of improved functional biomaterials in tissue engineering, drug delivery, and medical diagnostics.
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Affiliation(s)
- Xiuxia Sun
- State
Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou
University, Lanzhou 730000, P. R. China
| | - Manman He
- State
Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou
University, Lanzhou 730000, P. R. China
| | - Lang Wang
- State
Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou
University, Lanzhou 730000, P. R. China
| | - Liting Luo
- Key
laboratory of Magnetic Resonance in Biological Systems, State Key
Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese
Academy of Sciences, Wuhan 430071, China
| | - Jie Wang
- Key
laboratory of Magnetic Resonance in Biological Systems, State Key
Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese
Academy of Sciences, Wuhan 430071, China
| | - Jianxi Xiao
- State
Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou
University, Lanzhou 730000, P. R. China
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98
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Huang W, Restrepo D, Jung JY, Su FY, Liu Z, Ritchie RO, McKittrick J, Zavattieri P, Kisailus D. Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1901561. [PMID: 31268207 DOI: 10.1002/adma.201901561] [Citation(s) in RCA: 168] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/08/2019] [Indexed: 05/04/2023]
Abstract
Biological materials found in Nature such as nacre and bone are well recognized as light-weight, strong, and tough structural materials. The remarkable toughness and damage tolerance of such biological materials are conferred through hierarchical assembly of their multiscale (i.e., atomic- to macroscale) architectures and components. Herein, the toughening mechanisms of different organisms at multilength scales are identified and summarized: macromolecular deformation, chemical bond breakage, and biomineral crystal imperfections at the atomic scale; biopolymer fibril reconfiguration/deformation and biomineral nanoparticle/nanoplatelet/nanorod translation, and crack reorientation at the nanoscale; crack deflection and twisting by characteristic features such as tubules and lamellae at the microscale; and structure and morphology optimization at the macroscale. In addition, the actual loading conditions of the natural organisms are different, leading to energy dissipation occurring at different time scales. These toughening mechanisms are further illustrated by comparing the experimental results with computational modeling. Modeling methods at different length and time scales are reviewed. Examples of biomimetic designs that realize the multiscale toughening mechanisms in engineering materials are introduced. Indeed, there is still plenty of room mimicking the strong and tough biological designs at the multilength and time scale in Nature.
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Affiliation(s)
- Wei Huang
- Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, CA, 92521, USA
| | - David Restrepo
- Lyles School of Civil Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Jae-Young Jung
- Materials Science and Engineering Program, University of California San Diego, La Jolla, 92093, USA
| | - Frances Y Su
- Materials Science and Engineering Program, University of California San Diego, La Jolla, 92093, USA
| | - Zengqian Liu
- Department of Materials Science and Engineering, University of California Berkeley, Berkeley, CA, 94720, USA
- Materials Fatigue and Fracture Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Robert O Ritchie
- Department of Materials Science and Engineering, University of California Berkeley, Berkeley, CA, 94720, USA
| | - Joanna McKittrick
- Materials Science and Engineering Program, University of California San Diego, La Jolla, 92093, USA
- Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, 92093, USA
| | - Pablo Zavattieri
- Lyles School of Civil Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - David Kisailus
- Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, CA, 92521, USA
- Materials Science and Engineering Program, University of California Riverside, Riverside, CA, 92521, USA
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99
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Schlesinger PH, Blair HC, Beer Stolz D, Riazanski V, Ray EC, Tourkova IL, Nelson DJ. Cellular and extracellular matrix of bone, with principles of synthesis and dependency of mineral deposition on cell membrane transport. Am J Physiol Cell Physiol 2019; 318:C111-C124. [PMID: 31532718 DOI: 10.1152/ajpcell.00120.2019] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Bone differs from other connective tissues; it is isolated by a layer of osteoblasts that are connected by tight and gap junctions. This allows bone to create dense lamellar type I collagen, control pH, mineral deposition, and regulate water content forming a compact and strong structure. New woven bone formed after degradation of mineralized cartilage is rapidly degraded and resynthesized to impart structural order for local bone strength. Ossification is regulated by thickness of bone units and by patterning via bone morphogenetic receptors including activin, other bone morphogenetic protein receptors, transforming growth factor-β receptors, all part of a receptor superfamily. This superfamily interacts with receptors for additional signals in bone differentiation. Important features of the osteoblast environment were established using recent tools including osteoblast differentiation in vitro. Osteoblasts deposit matrix protein, over 90% type I collagen, in lamellae with orientation alternating parallel or orthogonal to the main stress axis of the bone. Into this organic matrix, mineral is deposited as hydroxyapatite. Mineral matrix matures from amorphous to crystalline hydroxyapatite. This process includes at least two-phase changes of the calcium-phosphate mineral as well as intermediates involving tropocollagen fibrils to form the bone composite. Beginning with initiation of mineral deposition, there is uncertainty regarding cardinal processes, but the driving force is not merely exceeding the calcium-phosphate solubility product. It occurs behind a epithelial-like layer of osteoblasts, which generate phosphate and remove protons liberated during calcium-phosphate salt deposition. The forming bone matrix is discontinuous from the general extracellular fluid. Required adjustment of ionic concentrations and water removal from bone matrix are important details remaining to be addressed.
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Affiliation(s)
| | - Harry C Blair
- Veterans Affairs Medical Center, Pittsburgh, Pennsylvania.,Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Donna Beer Stolz
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Vladimir Riazanski
- Department of Neurobiology, Pharmacology, and Physiology, University of Chicago, Chicago, Illinois
| | - Evan C Ray
- Renal Electrolyte Division, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Irina L Tourkova
- Veterans Affairs Medical Center, Pittsburgh, Pennsylvania.,Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Deborah J Nelson
- Department of Neurobiology, Pharmacology, and Physiology, University of Chicago, Chicago, Illinois
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100
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Ilamaran M, Janeena A, Valappil S, Ramudu KN, Shanmugam G, Niraikulam A. A self-assembly and higher order structure forming triple helical protein as a novel biomaterial for cell proliferation. Biomater Sci 2019; 7:2191-2199. [PMID: 30900708 DOI: 10.1039/c9bm00186g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Collagen plays a critical role in the structural design of the extracellular matrix (ECM) and cell signaling in mammals, which makes it one of the most promising biomaterials with versatile applications. However, there is considerable concern regarding the purity and predictability of the product performance. At present, it is mainly derived as a mixture of collagen (different types) from animal tissues, where the selective enrichment of a particular type of collagen is generally difficult and expensive. Collagen derived from bovine sources poses the risk of transmitting diseases and can cause adverse immunologic and inflammatory responses. Hence, recombinant collagen can be a good alternative. Nevertheless, the necessity of post-translational hydroxyproline (Hyp) modification limits large-scale recombinant collagen production. Here, we recombinantly expressed the collagen-like protein (CLTP) and genetically introduced the Hyp in the CLTP to form a higher order self-assembled fibril structure, similar to human collagen. During the current study, it was observed that the Hyp incorporated CLTP protein (CLTHP) formed a stable triple helical polyproline-II like structure and self-assembled to form fibrils at neutral pH, which had an initial lag phase followed by a growth phase similar to animal collagen. In contrast, the higher order fibrillar assembly was missing in the nonhydroxylated CLTP. This study demonstrated that CLTHP self-association is based on the common underlying lateral interactions between triple helical structured proteins, where the hydroxyproline forms the significantly stable hydration network. Hence, this work will be the first fundamental empirical research for flexible modifications of recombinant collagen for structural analysis and biomedical applications.
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Affiliation(s)
- Meganathan Ilamaran
- Division of Biochemistry and Biotechnology, Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI), Chennai, India.
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