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Vena MP, van Hazendonk LS, van Zyl W, Tuinier R, Friedrich H. A Systems Approach to Study Collagen Type I Self-Assembly: Kinetics and Morphology. SMALL METHODS 2024:e2301171. [PMID: 38229526 DOI: 10.1002/smtd.202301171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/18/2023] [Indexed: 01/18/2024]
Abstract
Collagen type I, the main component of the extracellular matrix in vertebrates, is widely used in tissue engineering applications. This is on account that collagen molecules can self-assemble under certain conditions into 3D fibrillar hydrogels. Although there is an extensive body of literature studying collagen self-assembly, there is a lack of systematic understanding on how different experimental factors, such as pH and temperature, and their cumulative effects guide the self-assembly process. In this work, a comprehensive workflow to study the interactive effects of several assembly parameters on the collagen self-assembly process is implemented. This workflow consists of: 1) efficient statistical sampling based on Design of Experiments, 2) high-throughput and automated data collection and 3) automated data analysis. This approach enables to screen several parameters simultaneously and derive a set of mathematical equations that link parameters with the kinetics and morphological aspects of collagen self-assembly, and can be used to design collagen constructs with predefined characteristics.
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Affiliation(s)
- María Paula Vena
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
- Center for Multiscale Electron Microscopy, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
| | - Laura S van Hazendonk
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
- Center for Multiscale Electron Microscopy, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
| | - Willem van Zyl
- Thermo Fisher Scientific, Zwaanstraat 31G/H, Building TR, Eindhoven, 5651 CA, The Netherlands
| | - Remco Tuinier
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
| | - Heiner Friedrich
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
- Center for Multiscale Electron Microscopy, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
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2
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Nayak VV, Tovar N, Khan D, Pereira AC, Mijares DQ, Weck M, Durand A, Smay JE, Torroni A, Coelho PG, Witek L. 3D Printing Type 1 Bovine Collagen Scaffolds for Tissue Engineering Applications-Physicochemical Characterization and In Vitro Evaluation. Gels 2023; 9:637. [PMID: 37623094 PMCID: PMC10454336 DOI: 10.3390/gels9080637] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 08/26/2023] Open
Abstract
Collagen, an abundant extracellular matrix protein, has shown hemostatic, chemotactic, and cell adhesive characteristics, making it an attractive choice for the fabrication of tissue engineering scaffolds. The aim of this study was to synthesize a fibrillar colloidal gel from Type 1 bovine collagen, as well as three dimensionally (3D) print scaffolds with engineered pore architectures. 3D-printed scaffolds were also subjected to post-processing through chemical crosslinking (in N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide) and lyophilization. The scaffolds were physicochemically characterized through Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis, Differential Scanning Calorimetry, and mechanical (tensile) testing. In vitro experiments using Presto Blue and Alkaline Phosphatase assays were conducted to assess cellular viability and the scaffolds' ability to promote cellular proliferation and differentiation. Rheological analysis indicated shear thinning capabilities in the collagen gels. Crosslinked and lyophilized 3D-printed scaffolds were thermally stable at 37 °C and did not show signs of denaturation, although crosslinking resulted in poor mechanical strength. PB and ALP assays showed no signs of cytotoxicity as a result of crosslinking. Fibrillar collagen was successfully formulated into a colloidal gel for extrusion through a direct inkjet writing printer. 3D-printed scaffolds promoted cellular attachment and proliferation, making them a promising material for customized, patient-specific tissue regenerative applications.
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Affiliation(s)
- Vasudev Vivekanand Nayak
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (V.V.N.); (P.G.C.)
| | - Nick Tovar
- Biomaterials Division, NYU College of Dentistry, New York, NY 10010, USA; (N.T.); (D.K.); (A.C.P.); (D.Q.M.)
- Department of Oral and Maxillofacial Surgery, New York University, Langone Medical Center and Bellevue Hospital Center, New York, NY 10016, USA
| | - Doha Khan
- Biomaterials Division, NYU College of Dentistry, New York, NY 10010, USA; (N.T.); (D.K.); (A.C.P.); (D.Q.M.)
| | - Angel Cabrera Pereira
- Biomaterials Division, NYU College of Dentistry, New York, NY 10010, USA; (N.T.); (D.K.); (A.C.P.); (D.Q.M.)
| | - Dindo Q. Mijares
- Biomaterials Division, NYU College of Dentistry, New York, NY 10010, USA; (N.T.); (D.K.); (A.C.P.); (D.Q.M.)
| | - Marcus Weck
- Department of Chemistry and Molecular Design Institute, New York University, New York, NY 10003, USA;
| | - Alejandro Durand
- Department of Biomedical Engineering, NYU Tandon School of Engineering, Brooklyn, NY 11201, USA;
| | - James E. Smay
- School of Materials Science and Engineering, Oklahoma State University, Tulsa, OK 74106, USA;
| | - Andrea Torroni
- Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, NY 10016, USA;
| | - Paulo G. Coelho
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA; (V.V.N.); (P.G.C.)
- DeWitt Daughtry Family Department of Surgery, Division of Plastic Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Lukasz Witek
- Biomaterials Division, NYU College of Dentistry, New York, NY 10010, USA; (N.T.); (D.K.); (A.C.P.); (D.Q.M.)
- Department of Biomedical Engineering, NYU Tandon School of Engineering, Brooklyn, NY 11201, USA;
- Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, NY 10016, USA;
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3
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Rezabeigi E, Griffanti G, Nazhat SN. Effect of Fibrillization pH on Gelation Viscoelasticity and Properties of Biofabricated Dense Collagen Matrices via Gel Aspiration-Ejection. Int J Mol Sci 2023; 24:ijms24043889. [PMID: 36835306 PMCID: PMC9967780 DOI: 10.3390/ijms24043889] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/17/2023] Open
Abstract
Reconstituted hydrogels based on the self-assembly of acid-solubilized collagen molecules have been extensively used as in vitro models and precursors in biofabrication processes. This study investigated the effect of fibrillization pH-ranging from 4 to 11-on real-time rheological property changes during the gelation of collagen hydrogels and its interplay with the properties of subsequently biofabricated dense collagen matrices generated via automated gel aspiration-ejection (GAE). A contactless, nondestructive technique was used to characterize the temporal progression in shear storage modulus (G', or stiffness) during collagen gelation. There was a relative increase in G' of the hydrogels from 36 to 900 Pa with an increase in gelation pH. Automated GAE, which simultaneously imparts collagen fibrillar compaction and alignment, was then applied to these precursor collagen hydrogels to biofabricate native extracellular matrix-like densified gels. In line with viscoelastic properties, only hydrogels fibrillized in the 6.5 < pH ≤ 10 range could be densified via GAE. There was an increase in both fibrillar density and alignment in the GAE-derived matrices with an increase in gelation pH. These factors, combined with a higher G' in the alkaline precursor hydrogels, led to a significant increase in the micro-compressive modulus of GAE-densified gels of pH 9 and 10. Furthermore, NIH/3T3 fibroblast-seeded GAE-derived matrices densified from gels fibrillized in the pH range of 7 to 10 exhibited low cell mortality with >80% viability. It is anticipated that the results of this study can be potentially applicable to other hydrogel systems, as well as biofabrication techniques involving needles or nozzles, such as injection and bioprinting.
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Khare E, Gonzalez-Obeso C, Kaplan DL, Buehler MJ. CollagenTransformer: End-to-End Transformer Model to Predict Thermal Stability of Collagen Triple Helices Using an NLP Approach. ACS Biomater Sci Eng 2022; 8:4301-4310. [PMID: 36149671 DOI: 10.1021/acsbiomaterials.2c00737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Collagen is one of the most important structural proteins in biology, and its structural hierarchy plays a crucial role in many mechanically important biomaterials. Here, we demonstrate how transformer models can be used to predict, directly from the primary amino acid sequence, the thermal stability of collagen triple helices, measured via the melting temperature Tm. We report two distinct transformer architectures to compare performance. First, we train a small transformer model from scratch, using our collagen data set featuring only 633 sequence-to-Tm pairings. Second, we use a large pretrained transformer model, ProtBERT, and fine-tune it for a particular downstream task by utilizing sequence-to-Tm pairings, using a deep convolutional network to translate natural language processing BERT embeddings into required features. Both the small transformer model and the fine-tuned ProtBERT model have similar R2 values of test data (R2 = 0.84 vs 0.79, respectively), but the ProtBERT is a much larger pretrained model that may not always be applicable for other biological or biomaterials questions. Specifically, we show that the small transformer model requires only 0.026% of the number of parameters compared to the much larger model but reaches almost the same accuracy for the test set. We compare the performance of both models against 71 newly published sequences for which Tm has been obtained as a validation set and find reasonable agreement, with ProtBERT outperforming the small transformer model. The results presented here are, to our best knowledge, the first demonstration of the use of transformer models for relatively small data sets and for the prediction of specific biophysical properties of interest. We anticipate that the work presented here serves as a starting point for transformer models to be applied to other biophysical problems.
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Affiliation(s)
- Eesha Khare
- Laboratory for Atomistic and Molecular Mechanics (LAMM), Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, United States.,Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, United States
| | | | - David L Kaplan
- Tufts University, Medford, Massachusetts 02155, United States
| | - Markus J Buehler
- Laboratory for Atomistic and Molecular Mechanics (LAMM), Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, United States.,Center for Computational Science and Engineering, Schwarzman College of Computing, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, United States
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5
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Tabatabaei F, Gelin A, Rasoulianboroujeni M, Tayebi L. Coating of 3D printed PCL/TCP scaffolds using homogenized-fibrillated collagen. Colloids Surf B Biointerfaces 2022; 217:112670. [PMID: 35779329 DOI: 10.1016/j.colsurfb.2022.112670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/26/2022] [Accepted: 06/27/2022] [Indexed: 11/15/2022]
Abstract
BACKGROUND Poly(3-caprolactone) (PCL)/β-tricalcium phosphate (β-TCP) composite scaffolds fabricated by three-dimensional (3D) printing are one of the common scaffolds for bone tissue regeneration. However, the main challenge of these 3D printed PCL/β-TCP scaffolds is the fact that many cells pass from porosities during in vitro cell seeding, leading to poor initial cell attachment. This study aimed to demonstrate the fabrication of a new collagen coating process for optimizing the hydrophilic property and cell-substrate interactions. This method may be used for coating collagen on any relevant biomedical constructs made of synthetic polymers to increase their biocompatibility and cell attachment. MATERIALS AND METHODS Porous composite scaffolds fabricated by 3D printing were coated with collagen by a novel method and compared to traditional methods. After plasma treatment, samples were inverted in a homogenized collagen solution, freeze-dried, stabilized by crosslinking, freeze-dried again, and fibrillated using a defined salt concentration. Samples were characterized by a 3D laser microscope, cytocompatibility assay, attenuated total reflectance Fourier-transform infrared (ATR-FTIR) spectroscopy, water absorption, protein absorption, and bioactivity assay. RESULTS Homogenized collagen at pH= 7 resulted in a very uniform layer on the surface of scaffolds with significantly higher cell proliferation (p < 0.05). Collagen-coated scaffolds showed significantly higher water absorption, protein absorption, and bioactivity compared to non-coated samples (p < 0.05). CONCLUSION The results demonstrate that both the pH and collagen structure influence the coating of scaffolds, while the concentrations used in this study do not have a significant difference in this aspect. The combination of homogenization and fibrillization makes scaffolds more biocompatible and desirable for bone tissue engineering.
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Affiliation(s)
| | - Alexandra Gelin
- School of Dentistry, Marquette University, Milwaukee, WI 53233, USA
| | | | - Lobat Tayebi
- School of Dentistry, Marquette University, Milwaukee, WI 53233, USA.
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Zheng H, Shi Y, Bi L, Zhang Z, Zhou Z, Shao C, Cui D, Cheng X, Tang R, Pan H, Wu Z, Fu B. Dual Functions of MDP Monomer with De- and Remineralizing Ability. J Dent Res 2022; 101:1172-1180. [PMID: 35450492 DOI: 10.1177/00220345221088214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Methacryloyloxydecyl dihydrogen phosphate (MDP) has been speculated to induce mineralization, but there has been no convincing evidence of its ability to induce intrafibrillar mineralization. Polymers play a critical role in biomimetic mineralization as stabilizers/inducers of amorphous precursors. Hence, MDP-induced biomimetic mineralization without polymer additives has not been fully verified or elucidated. By combining 3-dimensional stochastic optical reconstruction microscopy, surface zeta potentials, contact angle measurements, inductively coupled plasma-optical emission spectroscopy, transmission electron microscopy, atomic force microscopy, and Fourier transform infrared spectroscopy with circular dichroism, we show that amphiphilic MDP can not only demineralize dentin by releasing protons as an acidic functional monomer but also infiltrate collagen fibrils (including dentin collagen), unwind the triple helical structure by breaking hydrogen bonds, and finally immobilize within collagen. MDP-bound collagen functions as a huge collagenous phosphoprotein (HCPP), in contrast to chemical phosphorylation modifications. HCPP can induce biomimetic mineralization itself without polymer additives by alternatively attracting calcium and phosphate through electrostatic attraction. Therefore, we herein propose the dual functions of amphiphilic MDP monomer with de- and remineralizing ability. MDP in the free state can demineralize dentin substrates by releasing protons, whereas MDP in the collagen-bound state as HCPP can induce intrafibrillar mineralization. The dual functions of MDP monomer with de- and remineralization properties might create a new epoch in adhesive dentistry and preventive dentistry.
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Affiliation(s)
- H Zheng
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Dental Biomaterials and Devices for Zhejiang Provincial Engineering Research Center, Hangzhou, Zhejiang Province, China
| | - Y Shi
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Dental Biomaterials and Devices for Zhejiang Provincial Engineering Research Center, Hangzhou, Zhejiang Province, China
| | - L Bi
- The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Z Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Dental Biomaterials and Devices for Zhejiang Provincial Engineering Research Center, Hangzhou, Zhejiang Province, China
| | - Z Zhou
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Dental Biomaterials and Devices for Zhejiang Provincial Engineering Research Center, Hangzhou, Zhejiang Province, China
| | - C Shao
- Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA, USA
| | - D Cui
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing, Jiangsu Province, China
| | - X Cheng
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing, Jiangsu Province, China
| | - R Tang
- Center for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - H Pan
- Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Z Wu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Dental Biomaterials and Devices for Zhejiang Provincial Engineering Research Center, Hangzhou, Zhejiang Province, China
| | - B Fu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Dental Biomaterials and Devices for Zhejiang Provincial Engineering Research Center, Hangzhou, Zhejiang Province, China
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7
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Rehydration of the Tendon Fascicle Bundles Using Simulated Body Fluid Ensures Stable Mechanical Properties of the Samples. MATERIALS 2022; 15:ma15093033. [PMID: 35591368 PMCID: PMC9104251 DOI: 10.3390/ma15093033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/31/2022] [Accepted: 04/11/2022] [Indexed: 11/24/2022]
Abstract
In this work, we investigate the influence of dehydration and subsequent rehydration of tendon fascicle bundles on their structural and mechanical properties by using distilled water, 0.9% NaCl, 10% NaCl, SBF, and double concentrated SBF (SBFx2). The properties of tendon fascicle bundles were investigated by means of uniaxial tests with relaxation periods and hysteresis for samples with various interfascicular matrix content, dissected from the anterior and posterior areas of bovine tendon. Uniaxial tests with relaxation periods and analysis of sample geometry and weight showed that dehydration alters the modulus of elasticity dependent on the interfascicular matrix content and influences the viscoelastic properties of tendon fascicle bundles. Tensile and relaxation tests revealed that changes resulting from excessive sample drying can be reversed by rehydration in an SBF bath solution for elastic strain range above the toe region. Rehydration in SBF solution led to minor differences in mechanical properties when compared to control samples. Moreover, anterior samples with greater interfascicular matrix content, despite their lower stiffness, are less sensitive to sample drying. The obtained results allow us to limit the discrepancies in the measurement of mechanical properties of wet biological samples and can be useful to researchers investigating soft tissue mechanics and the stability of transplant materials.
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Riedl P, Schricker M, Pompe T. Stiffness Variation of 3D Collagen Networks by Surface Functionalization of Network Fibrils with Sulfonated Polymers. Gels 2021; 7:266. [PMID: 34940326 PMCID: PMC8702206 DOI: 10.3390/gels7040266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/03/2021] [Accepted: 12/11/2021] [Indexed: 11/16/2022] Open
Abstract
Fibrillar collagen is the most prominent protein in the mammalian extracellular matrix. Therefore, it is also widely used for cell culture research and clinical therapy as a biomimetic 3D scaffold. Charged biopolymers, such as sulfated glycosaminoglycans, occur in vivo in close contact with collagen fibrils, affecting many functional properties such as mechanics and binding of growth factors. For in vitro application, the functions of sulfated biopolymer decorations of fibrillar collagen materials are hardly understood. Herein, we report new results on the stiffness dependence of 3D collagen I networks by surface functionalization of the network fibrils with synthetic sulfonated polymers, namely, poly(styrene sulfonate) (PSS) and poly(vinyl sulfonate) (PVS). A non-monotonic stiffness dependence on the amount of adsorbed polymer was found for both polymers. The stiffness dependence correlated to a transition from mono- to multilayer adsorption of sulfonated polymers on the fibrils, which was most prominent for PVS. PVS mono- and multilayers caused a network stiffness change by a factor of 0.3 and 2, respectively. A charge-dependent weakening of intrafibrillar salt bridges by the adsorbed sulfonated polymers leading to fibrillar softening is discussed as the mechanism for the stiffness decrease in the monolayer regime. In contrast, multilayer adsorption can be assumed to induce interfibrillar bridging and an increase in network stiffness. Our in vitro results have a strong implication on in vivo characteristics of fibrillar collagen I, as sulfated glycosaminoglycans frequently attach to collagen fibrils in various tissues, calling for an up to now overlooked impact on matrix and tendon mechanics.
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Affiliation(s)
| | | | - Tilo Pompe
- Institute of Biochemistry, Faculty of Life Sciences, Leipzig University, 04103 Leipzig, Germany; (P.R.); (M.S.)
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9
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A substrate protection approach to applying the calcium ion for improving the proteolysis resistance of the collagen. Appl Microbiol Biotechnol 2021; 105:9191-9209. [PMID: 34841465 DOI: 10.1007/s00253-021-11704-1] [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: 08/22/2021] [Revised: 11/16/2021] [Accepted: 11/20/2021] [Indexed: 10/19/2022]
Abstract
Enzymatic dehairing, as a crucial part of cleaner leather processing, has reached processive advancement with potentially replacing the traditional hair removal due to increasing pressure from environmental demand. However, this cleaner technology based on proteases has a problem that the hide grain (collagen-rich structure) is susceptible to be hydrolyzed, decreasing the quality of finished leather. From the perspective of improving the stability of collagen fibers and their resistance to proteolysis, a method for protecting the hide grain during the enzymatic dehairing process was developed. The results showed that calcium ions had a swelling effect on collagen fibers under near-neutral conditions (pH 6.0-10.0), decreasing the thermal stability of collagen and the proteolysis resistance of collagen significantly. The alkaline environment (pH 10.0-12.0) will promote the dissociation of carboxyl groups in hide collagen, promoting the combination of calcium ions and carboxyl groups. This strategy can change the surface charge of collagen fibers and strengthen the connection between collagen fibers, thus improving protease resistance and the thermal stability of collagen. However, collagen fibers could swell violently once the alkalinity of the solution environment was extreme. Despite the above situation, calcium ion was still conducive to maintain the structural stability of collagen fibers. At pH 10.0-12.0, pretreating animal hide with a solution containing calcium ions can improve the protease resistance of hide grain, making the hide grain well-protected. This method provided an effective way to establish a safer enzymatic unhairing technology based on substrate protection. KEY POINTS: • A collagen protection method for hair removal of animal hide was developed. • This method applied calcium ions to collagen at alkaline conditions (pH 10.0-12.0). • Pretreatment results of calcium ions at different pH values on animal hide were compared.
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10
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Gibney R, Ferraris E. Bioprinting of Collagen Type I and II via Aerosol Jet Printing for the Replication of Dense Collagenous Tissues. Front Bioeng Biotechnol 2021; 9:786945. [PMID: 34805132 PMCID: PMC8602098 DOI: 10.3389/fbioe.2021.786945] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 10/19/2021] [Indexed: 12/03/2022] Open
Abstract
Collagen has grown increasingly present in bioprinting, however collagen bioprinting has mostly been limited to the extrusion printing of collagen type I to form weak collagen hydrogels. While these weak collagen hydrogels have their applications, synthetic polymers are often required to reinforce gel-laden constructs that aim to replicate dense collagenous tissues found in vivo. In this study, aerosol jet printing (AJP) was used to print and process collagen type I and II into dense constructs with a greater capacity to replicate the dense collagenous ECM found in connective tissues. Collagen type I and II was isolated from animal tissues to form solutions for printing. Collagen type I and II constructs were printed with 576 layers and measured to have average effective elastic moduli of 241.3 ± 94.3 and 196.6 ± 86.0 kPa (±SD), respectively, without any chemical modification. Collagen type II solutions were measured to be less viscous than type I and both collagen type I and II exhibited a drop in viscosity due to AJP. Circular dichroism and SDS-PAGE showed collagen type I to be more vulnerable to structural changes due to the stresses of the aerosol formation step of aerosol jet printing while the collagen type II triple helix was largely unaffected. SEM illustrated that distinct layers remained in the aerosol jet print constructs. The results show that aerosol jet printing should be considered an effective way to process collagen type I and II into stiff dense constructs with suitable mechanical properties for the replication of dense collagenous connective tissues.
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Affiliation(s)
- Rory Gibney
- Department of Mechanical Engineering, KU Leuven Campus De Nayer, Leuven, Belgium
- Department of Materials Engineering, KU Leuven, Leuven, Belgium
| | - Eleonora Ferraris
- Department of Mechanical Engineering, KU Leuven Campus De Nayer, Leuven, Belgium
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11
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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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12
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Petersen EJ, Sharma M, Clippinger AJ, Gordon J, Katz A, Laux P, Leibrock LB, Luch A, Matheson J, Stucki AO, Tentschert J, Bierkandt FS. Use of Cause-and-Effect Analysis to Optimize the Reliability of In Vitro Inhalation Toxicity Measurements Using an Air-Liquid Interface. Chem Res Toxicol 2021; 34:1370-1385. [PMID: 34097823 DOI: 10.1021/acs.chemrestox.1c00080] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In vitro inhalation toxicology methods are increasingly being used for research and regulatory purposes. Although the opportunity for increased human relevance of in vitro inhalation methods compared to in vivo tests has been established and discussed, how to systematically account for variability and maximize the reliability of these in vitro methods, especially for assays that use cells cultured at an air-liquid interface (ALI), has received less attention. One tool that has been used to evaluate the robustness of in vitro test methods is cause-and-effect (C&E) analysis, a conceptual approach to analyze key sources of potential variability in a test method. These sources of variability can then be evaluated using robustness testing and potentially incorporated into in-process control measurements in the assay protocol. There are many differences among in vitro inhalation test methods including the use of different types of biological test systems, exposure platforms/conditions, substances tested, and end points, which represent a major challenge for use in regulatory testing. In this manuscript, we describe how C&E analysis can be applied using a modular approach based on the idea that shared components of different test methods (e.g., the same exposure system is used) have similar sources of variability even though other components may differ. C&E analyses of different in vitro inhalation methods revealed a common set of recommended exposure systems and biological in-process control measurements. The approach described here, when applied in conjunction with Good Laboratory Practices (GLP) criteria, should help improve the inter- and intralaboratory agreement of in vitro inhalation test results, leading to increased confidence in these methods for regulatory and research purposes.
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Affiliation(s)
- Elijah J Petersen
- Biosystems and Biomaterials Division, Material Measurement Laboratory, National Institute of Standards and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
| | - Monita Sharma
- PETA Science Consortium International e.V., 70499 Stuttgart, Germany
| | - Amy J Clippinger
- PETA Science Consortium International e.V., 70499 Stuttgart, Germany
| | - John Gordon
- United States Consumer Product Safety Commission, 5 Research Place, Rockville, Maryland 20850, United States
| | - Aaron Katz
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Peter Laux
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Lars B Leibrock
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Andreas Luch
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Joanna Matheson
- United States Consumer Product Safety Commission, 5 Research Place, Rockville, Maryland 20850, United States
| | - Andreas O Stucki
- PETA Science Consortium International e.V., 70499 Stuttgart, Germany
| | - Jutta Tentschert
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Frank S Bierkandt
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
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13
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Wang H, Falcoz S, Berteau JP. Long-Chain Fatty Acids in Bones and Their Link to Submicroscopic Vascularization Network: NMR Assignment and Relaxation Studies under Magic Angle Spinning Conditions in Intramuscular Bones of Atlantic Herring Fish. J Phys Chem B 2021; 125:4585-4595. [PMID: 33914538 DOI: 10.1021/acs.jpcb.1c00186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The long-lasting proton signals in bones are identified as long-chain fatty acids, including saturated, mono-, and di-unsaturated fatty acids, with direct nuclear magnetic resonance evidence. We used intramuscular bones from Atlantic Herring fish to avoid interference from lipid-rich marrows. The key is to recognize that these signals are from mobile phase materials and study them with J-coupled correlation spectroscopies under magic angle spinning conditions. We kept extensive 1H-spin-echo records that allowed us to examine the effect of magic angle spinning on the transverse relaxation time of water and lipids over time. While it is impossible to distinguish based on chemical shifts, the relaxation data suggest that the signals are more consistent with the interpretation of phospholipid membranes than triglycerides in lipid droplets. In particular, the simultaneous T2 changes in water and lipids suggest that the centrifugal impact of magic angle spinning alters the lipid's structure in very tight spaces. Additional evidence of phospholipid membranes came from the choline-γ resonance at 3.2 ppm in fresh samples, which disappears with magic angle spinning. Thus, the fatty acid signals are at least partially from membrane bilayer structures, and we propose that they are linked to the submicroscopic vascularization channels similar to the dense canaliculi network in mammalian bones. Our detection of phospholipids from bones depended critically on two factors: (1) the elimination of the overwhelming triglyceride signals from marrows and (2) the preservation of water that biomembranes require. The relaxation data reveal aspects of lipid fluidity that have not been elucidated by previous order parameter studies on model membranes. Relaxation times have long been considered difficult to interpret. A robust and renewed understanding may be beneficial.
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Affiliation(s)
- Hsin Wang
- Department of Chemistry and Biochemistry, The City College of New York and CUNY Institute for Macromolecular Assemblies, 85 St. Nicholas Terrace, New York, New York 10031, United States
| | - Steve Falcoz
- Department of Physical Therapy, The College of Staten Island, 2800 Victory Blvd, Staten Island, New York 10314, United States
| | - Jean-Philippe Berteau
- Department of Physical Therapy, The College of Staten Island, 2800 Victory Blvd, Staten Island, New York 10314, United States.,New York Centre for Biomedical Engineering, City University of New York - City College of New York, New York, New York 10031, United States.,Nanosciences Initiative, City University of New York - Advance Science Research Center, New York, New York 10031, United States
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14
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Sarrigiannidis S, Rey J, Dobre O, González-García C, Dalby M, Salmeron-Sanchez M. A tough act to follow: collagen hydrogel modifications to improve mechanical and growth factor loading capabilities. Mater Today Bio 2021; 10:100098. [PMID: 33763641 PMCID: PMC7973388 DOI: 10.1016/j.mtbio.2021.100098] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/16/2021] [Accepted: 01/20/2021] [Indexed: 12/13/2022] Open
Abstract
Collagen hydrogels are among the most well-studied platforms for drug delivery and in situ tissue engineering, thanks to their low cost, low immunogenicity, versatility, biocompatibility, and similarity to the natural extracellular matrix (ECM). Despite collagen being largely responsible for the tensile properties of native connective tissues, collagen hydrogels have relatively low mechanical properties in the absence of covalent cross-linking. This is particularly problematic when attempting to regenerate stiffer and stronger native tissues such as bone. Furthermore, in contrast to hydrogels based on ECM proteins such as fibronectin, collagen hydrogels do not have any growth factor (GF)-specific binding sites and often cannot sequester physiological (small) amounts of the protein. GF binding and in situ presentation are properties that can aid significantly in the tissue regeneration process by dictating cell fate without causing adverse effects such as malignant tumorigenic tissue growth. To alleviate these issues, researchers have developed several strategies to increase the mechanical properties of collagen hydrogels using physical or chemical modifications. This can expand the applicability of collagen hydrogels to tissues subject to a continuous load. GF delivery has also been explored, mathematically and experimentally, through the development of direct loading, chemical cross-linking, electrostatic interaction, and other carrier systems. This comprehensive article explores the ways in which these parameters, mechanical properties and GF delivery, have been optimized in collagen hydrogel systems and examines their in vitro or in vivo biological effect. This article can, therefore, be a useful tool to streamline future studies in the field, by pointing researchers into the appropriate direction according to their collagen hydrogel design requirements.
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Affiliation(s)
| | | | - O. Dobre
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, UK
| | - C. González-García
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, UK
| | - M.J. Dalby
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, UK
| | - M. Salmeron-Sanchez
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, UK
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15
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Xie X, Zheng T, Li W. Recent Progress in Ionic Coassembly of Cationic Peptides and Anionic Species. Macromol Rapid Commun 2020; 41:e2000534. [PMID: 33225490 DOI: 10.1002/marc.202000534] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/10/2020] [Indexed: 12/25/2022]
Abstract
Peptide assembly has been extensively exploited as a promising platform for the creation of hierarchical nanostructures and tailor-made bioactive materials. Ionic coassembly of cationic peptides and anionic species is paving the way to provide particularly important contribution to this topic. In this review, the recent progress of ionic coassembly soft materials derived from the electrostatic coupling between cationic peptides and anionic species in aqueous solution is systematically summarized. The presentation of this review starts from a brief background on the general importance and advantages of peptide-based ionic coassembly. After that, diverse combinations of cationic peptides with small anions, macro- and/or oligo-anions, anionic polymers, and inorganic polyoxometalates are described. Emphasis is placed on the hierarchical structures, value-added properties, and applications. The molecular design of cationic peptides and the general principles behind the ionic coassembled structures are discussed. It is summarized that the combination of interesting and unique characteristics that arise both from the chemical diversity of peptides and the wide range of anionic species may contribute in a variety of output, including drug delivery, tissue engineering, gene transfection, and antibacterial activity. The emergent new phenomena and findings are illustrated. Finally, the outlook for the peptide-based ionic coassembly systems is also presented.
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Affiliation(s)
- Xiaoming Xie
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjing Avenue 2699, Changchun, 130012, China.,Department of Chemistry, Xinzhou Teachers' University, Xinzhou, Shanxi, 034000, China
| | - Tingting Zheng
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjing Avenue 2699, Changchun, 130012, China
| | - Wen Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjing Avenue 2699, Changchun, 130012, China
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16
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Morimoto K, Kunii S, Tonomura B. Defective chicken skin collagen molecules, hydrolyzed by actinidain protease, assemble to form loosely packed fibrils that promote cell spheroid formation. Int J Biol Macromol 2020; 167:1066-1075. [PMID: 33220378 DOI: 10.1016/j.ijbiomac.2020.11.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/25/2020] [Accepted: 11/08/2020] [Indexed: 11/30/2022]
Abstract
Cells recognize collagen fibrils as the first step in the process of adherence. Fibrils of chicken skin actinidain-hydrolyzed collagen (low adhesive scaffold collagen, LASCol), in which the telopeptide domains are almost completely removed, cause adhering cells to form spheroids instead of adopting a monolayer morphology. Our goal was to elucidate the ultrastructure of the LASCol fibrils compared with pepsin-hydrolyzed collagen (PepCol) fibrils. At low concentration of 0.2 mg/mL, the time to reach the maximum increasing rate of turbidity for LASCol was all slower than that for PepCol. Differential scanning calorimetry showed that the thermal stability of collagen self-assembly changed significantly between pH 5.5 and pH 6.6 with and without a small number of telopeptides. However, the calorimetric enthalpy change did not vary much in that pH range. The melting temperature of LASCol fibrils at pH 7.3 was 55.1 °C, whereas PepCol fibrils exhibited a peak around 56.9 °C. The D-periodicity of each fibril was the same at 67 nm. Nevertheless, the looseness of molecular packing in LASCol fibrils was demonstrated by circular dichroism measurements and immuno-scanning electron microscopy with a polyclonal antibody against type I collagen. As there is a close relationship between function and structure, loosely packed collagen fibrils would be one factor that promotes cell spheroid formation.
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Affiliation(s)
- Koichi Morimoto
- Department of Genetic Engineering, Kindai University, 930 Nishimitani, Kinokawa, Wakayama 649-6493, Japan.
| | - Saori Kunii
- Department of Genetic Engineering, Kindai University, 930 Nishimitani, Kinokawa, Wakayama 649-6493, Japan
| | - Ben'ichiro Tonomura
- Department of Genetic Engineering, Kindai University, 930 Nishimitani, Kinokawa, Wakayama 649-6493, Japan
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17
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Akita M, Nishikawa Y, Shigenobu Y, Ambe D, Morita T, Morioka K, Adachi K. Correlation of proline, hydroxyproline and serine content, denaturation temperature and circular dichroism analysis of type I collagen with the physiological temperature of marine teleosts. Food Chem 2020; 329:126775. [DOI: 10.1016/j.foodchem.2020.126775] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 03/08/2020] [Accepted: 04/07/2020] [Indexed: 12/24/2022]
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18
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Valente KP, Suleman A, Brolo AG. Exploring Diffusion and Cellular Uptake: Charged Gold Nanoparticles in an in Vitro Breast Cancer Model. ACS APPLIED BIO MATERIALS 2020; 3:6992-7002. [PMID: 35019358 DOI: 10.1021/acsabm.0c00872] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Gold nanoparticles have emerged as a prominent tool in nanomedicine, particularly for applications in cancer diagnostic and treatment. One of the challenges for the successful implementation of gold nanoparticles in cancer therapy is their delivery to the specific cancer area within the tumor microenvironment. The presence of cancer enables a poorly organized vascularization system, increasing the pressure with the microenvironment, limiting the uptake of particles. The physicochemical properties of the gold nanoparticles (size, shape, and surface charge) also have a significant effect on diffusion to the tumor site and cellular uptake. In this work, we analyzed the transport of 10 nm gold nanoparticles with different surface charges (neutral, negative, and positive) through a hydrogel composite. Three-dimensional in vitro models composed of breast cancer cells loaded in the hydrogel composite were used for the qualitative and quantitative evaluation of cellular uptake of the gold nanoparticles. Surprisingly, an inverse correlation between the diffusion coefficients of the nanoparticles and cellular uptake was demonstrated. Positively charged gold nanoparticles displayed high cellular uptake, although their diffusion coefficient indicated slow transport through the hydrogel matrix. Neutral particles, on the other hand, displayed fast diffusion but the lowest cellular uptake. The results obtained indicate that nanoparticle diffusion and cellular uptake should be studied together in realistic in vitro models for a true evaluation of transport in tumor microenvironments.
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Affiliation(s)
- Karolina P Valente
- Department of Mechanical Engineering, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada.,Centre for Advanced Materials and Related Technology, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
| | - Afzal Suleman
- Department of Mechanical Engineering, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
| | - Alexandre G Brolo
- Department of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada.,Centre for Advanced Materials and Related Technology, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
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19
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James BD, Guerin P, Iverson Z, Allen JB. Mineralized DNA-collagen complex-based biomaterials for bone tissue engineering. Int J Biol Macromol 2020; 161:1127-1139. [PMID: 32561285 PMCID: PMC7494536 DOI: 10.1016/j.ijbiomac.2020.06.126] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/03/2020] [Accepted: 06/12/2020] [Indexed: 02/07/2023]
Abstract
DNA is a highly polyanionic biomolecule that complexes with both collagen and hydroxyapatite. By combining these complexes, we synthesized nucleic-acid collagen complexes (NACC) mineralized with hydroxyapatite. The composite complexes were made using a short, monodisperse single-stranded DNA, type I collagen, and mineralizing medium. They rapidly self-assembled into both mineralized NACC microfibers and 3D NACC gels. At the nanoscale, these complexes are hierarchical, interwoven, curly nanofibrils resembling native extracellular matrix, which mineralized an interpenetrating nanocrystalline hydroxyapatite phase. Mineralization was able to be done either before or after NACC formation enabling temporal control of the process. In response to the NACC material, primary human osteoblasts took on an osteocyte-like morphology. Moreover, the cells agglomerated and remodeled the NACC gels into densified, tissue-like structures within 3 days. NACC fibers and gels have promise not only as osteoconductive coatings and scaffolds, but as coatings and scaffolds for any tissue using this new form of naturally-derived biomaterials.
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Affiliation(s)
- Bryan D James
- Department of Materials Science and Engineering, University of Florida, 206 Rhines Hall, PO Box 116400, Gainesville, FL 32611-6400, USA
| | - Paxton Guerin
- Department of Materials Science and Engineering, University of Florida, 206 Rhines Hall, PO Box 116400, Gainesville, FL 32611-6400, USA
| | - Zion Iverson
- Department of Materials Science and Engineering, University of Florida, 206 Rhines Hall, PO Box 116400, Gainesville, FL 32611-6400, USA
| | - Josephine B Allen
- Department of Materials Science and Engineering, University of Florida, 206 Rhines Hall, PO Box 116400, Gainesville, FL 32611-6400, USA.
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20
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Lyons S, Mc Kiernan EP, Dee G, Brougham DF, Morrin A. Electrostatically modulated magnetophoretic transport of functionalised iron-oxide nanoparticles through hydrated networks. NANOSCALE 2020; 12:10550-10558. [PMID: 32159560 DOI: 10.1039/d0nr01602k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Factors that determine magnetophoretic transport of magnetic nanoparticles (MNPs) through hydrated polymer networks under the influence of an external magnetic field gradient were studied. Functionalised iron oxide cores (8.9 nm core diameter) were tracked in real-time as they moved through agarose gels under the influence of an inhomogeneous magnetic field. Terminal magnetophoretic velocities were observed in all cases, these were quantified and found to be highly reproducible and sensitive to the conditions. Increasing agarose content reduced magnetophoretic velocity, we attribute this to increasingly tortuous paths through the porous hydrated polymer network and propose a new factor to quantify the tortuosity. The impact of MNP surface functionalisation, charge, network fixed charge content, and ionic strength of the aqueous phase on velocity were studied to separate these effects. For MNPs functionalised with polyethylene glycol (PEG) increasing chain length reduced velocity but the tortuosity extracted, which is a function of the network, was unchanged; validating the approach. For charged citrate- and arginine-functionalised MNPs, magnetophoretic velocities were found to increase for particles with positive and decrease for particles with negative zeta potential. In both cases these effects could be moderated by reducing the number of agarose anionic residues and/or increasing the ionic strength of the aqueous phase; conditions under which tortuosity again becomes the critical factor. A model for MNP transport identifying the contributions from the tortuous pore network and from electrostatic effects associated with the pore constrictions is proposed.
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Affiliation(s)
- Stephen Lyons
- Insight SFI Research Centre For Data Analytics; National Centre for Sensor Research; School of Chemical Sciences, Dublin City University, Ireland.
| | | | - Garret Dee
- School of Chemistry, Trinity College Dublin, Ireland
| | | | - Aoife Morrin
- Insight SFI Research Centre For Data Analytics; National Centre for Sensor Research; School of Chemical Sciences, Dublin City University, Ireland.
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21
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Oh S, Nguyen QD, Chung KH, Lee H. Bundling of Collagen Fibrils Using Sodium Sulfate for Biomimetic Cell Culturing. ACS OMEGA 2020; 5:3444-3452. [PMID: 32118158 PMCID: PMC7045499 DOI: 10.1021/acsomega.9b03704] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/31/2020] [Indexed: 06/10/2023]
Abstract
Collagen is the most abundant extracellular matrix protein. The concentrations, structural arrangement, and directionality of collagen depend on the type of tissue. Thick fibril bundles of collagen are observed in most collagenous tissues, including connective tissues, bones, and tendons, indicating that they play a critical role in many cell functions. In this study, we developed a new method to regulate collagen bundling without altering the protein concentration, temperature, or pH by using sodium sulfate to replicate bundled collagen fibrils found in vivo. Microstructure analysis revealed that both the thickness of the fibril bundles and the pore size of the matrix increased with the amount of sodium sulfate. In contrast, there was no significant change in the bulk mechanical stiffness of the collagen matrix. The modified collagen bundle matrix was used to investigate the responses of human cervical cancer cells by mimicking the extracellular environments of a tumor. Compared to the normal collagen matrix, cells on the collagen bundle matrix exhibited significant changes in morphology, with a reduced cell perimeter and aspect ratio. The cell motility, which was analyzed in terms of the speed of migration and mean squared displacement, decreased for the collagen bundle matrix. Additionally, the critical time taken for the peak turning angle to converge to 90° decreased, indicating that the migration direction was regulated by geometric cues provided by collagen bundles rather than by the intrinsic cell persistence. The experimental results imply that collagen bundles play an important role in determining the magnitude and direction in cancer cell migration. The proposed method of extracellular matrix modification can be applied to investigate various cellular behaviors in both physiological and pathological environments.
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Affiliation(s)
- Seunghee Oh
- School of Mechanical
Engineering, Yonsei University, Seoul 03722, South Korea
- Global Technology Center, Samsung
Electronics, Co., Ltd., Suwon 16677, South Korea
| | - Quang Dang Nguyen
- School of Mechanical Engineering, University of Ulsan, Ulsan 44610, South
Korea
| | - Koo-Hyun Chung
- School of Mechanical Engineering, University of Ulsan, Ulsan 44610, South
Korea
| | - Hyungsuk Lee
- School of Mechanical
Engineering, Yonsei University, Seoul 03722, South Korea
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22
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Lama M, Fernandes FM, Marcellan A, Peltzer J, Trouillas M, Banzet S, Grosbot M, Sanchez C, Giraud-Guille MM, Lataillade JJ, Coulomb B, Boissière C, Nassif N. Self-Assembled Collagen Microparticles by Aerosol as a Versatile Platform for Injectable Anisotropic Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1902224. [PMID: 31880410 DOI: 10.1002/smll.201902224] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 11/01/2019] [Indexed: 06/10/2023]
Abstract
Extracellular matrices (ECM) rich in type I collagen exhibit characteristic anisotropic ultrastructures. Nevertheless, working in vitro with this biomacromolecule remains challenging. When processed, denaturation of the collagen molecule is easily induced in vitro avoiding proper fibril self-assembly and further hierarchical order. Here, an innovative approach enables the production of highly concentrated injectable collagen microparticles, based on collagen molecules self-assembly, thanks to the use of spray-drying process. The versatility of the process is shown by performing encapsulation of secretion products of gingival mesenchymal stem cells (gMSCs), which are chosen as a bioactive therapeutic product for their potential efficiency in stimulating the regeneration of a damaged ECM. The injection of collagen microparticles in a cell culture medium results in a locally organized fibrillar matrix. The efficiency of this approach for making easily handleable collagen microparticles for encapsulation and injection opens perspectives in active tissue regeneration and 3D bioprinted scaffolds.
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Affiliation(s)
- Milena Lama
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, F-75005, Paris, France
- Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, CNRS, Sorbonne Université, 10 rue Vauquelin, F-75005, Paris, France
| | - Francisco M Fernandes
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, F-75005, Paris, France
| | - Alba Marcellan
- Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, CNRS, Sorbonne Université, 10 rue Vauquelin, F-75005, Paris, France
| | - Juliette Peltzer
- Prof. J.-J. Lataillade, Unité mixte Inserm UMR-1197 - Institut de Recherche Biomédicale des Armées (IRBA), Antenne Centre de Transfusion Sanguine des Armées, 1, rue du Lieutenant Raoul Batany, F-92141, Clamart, France
| | - Marina Trouillas
- Prof. J.-J. Lataillade, Unité mixte Inserm UMR-1197 - Institut de Recherche Biomédicale des Armées (IRBA), Antenne Centre de Transfusion Sanguine des Armées, 1, rue du Lieutenant Raoul Batany, F-92141, Clamart, France
| | - Sébastien Banzet
- Prof. J.-J. Lataillade, Unité mixte Inserm UMR-1197 - Institut de Recherche Biomédicale des Armées (IRBA), Antenne Centre de Transfusion Sanguine des Armées, 1, rue du Lieutenant Raoul Batany, F-92141, Clamart, France
| | - Marion Grosbot
- Prof. J.-J. Lataillade, Unité mixte Inserm UMR-1197 - Institut de Recherche Biomédicale des Armées (IRBA), Antenne Centre de Transfusion Sanguine des Armées, 1, rue du Lieutenant Raoul Batany, F-92141, Clamart, France
| | - Clément Sanchez
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, F-75005, Paris, France
| | - Marie-Madeleine Giraud-Guille
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, F-75005, Paris, France
| | - Jean-Jacques Lataillade
- Prof. J.-J. Lataillade, Unité mixte Inserm UMR-1197 - Institut de Recherche Biomédicale des Armées (IRBA), Antenne Centre de Transfusion Sanguine des Armées, 1, rue du Lieutenant Raoul Batany, F-92141, Clamart, France
| | - Bernard Coulomb
- Paris Research Cardiovascular Center (PARCC), Institut National de la Santé et de la Recherche Médicale (INSERM) U970, Paris-Descartes University, 56 rue Leblanc, F-75015, Paris, France
| | - Cédric Boissière
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, F-75005, Paris, France
| | - Nadine Nassif
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, F-75005, Paris, France
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23
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Shen L, Bu H, Yang H, Xu S, Li G. pH‐responsive variation of biomineralization via collagen self‐assembly and the simultaneous formation of apatite minerals. J Appl Polym Sci 2019. [DOI: 10.1002/app.48876] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lirui Shen
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education)Sichuan University Chengdu 610065 China
| | - Honghong Bu
- National Engineering Laboratory for Clean Technology of Leather ManufactureSichuan University Chengdu 610065 China
| | - Huan Yang
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education)Sichuan University Chengdu 610065 China
| | - Songcheng Xu
- National Engineering Laboratory for Clean Technology of Leather ManufactureSichuan University Chengdu 610065 China
| | - Guoying Li
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education)Sichuan University Chengdu 610065 China
- National Engineering Laboratory for Clean Technology of Leather ManufactureSichuan University Chengdu 610065 China
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24
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Yuan B, Li P, Wang P, Yang H, Sun H, Li P, Sun H, Niu QJ. Novel aliphatic polyamide membrane with high mono-/divalent ion selectivity, excellent Ca2+, Mg2+ rejection, and improved antifouling properties. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.05.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Wang SS, Yu Y, Sun Y, Liu N, Zhou DQ. Comparison of Physicochemical Characteristics and Fibril Formation Ability of Collagens Extracted from the Skin of Farmed River Puffer ( Takifugu obscurus) and Tiger Puffer ( Takifugu rubripes). Mar Drugs 2019; 17:md17080462. [PMID: 31394862 PMCID: PMC6723254 DOI: 10.3390/md17080462] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/03/2019] [Accepted: 08/05/2019] [Indexed: 12/18/2022] Open
Abstract
Acid-soluble collagen (ASC) and pepsin-soluble collagen (PSC) from the skin of river puffer (ASC-RP and PSC-RP) and tiger puffer (ASC-TP and PSC-TP) were extracted and physicochemically examined. Denaturation temperature (Td) for all the collagens was found to be 25.5–29.5 °C, which was lower than that of calf skin collagen (35.9 °C). Electrophoretic patterns indicated all four samples were type I collagen with molecular form of (α1)2α2. FTIR spectra confirmed the extracted collagens had a triple-helical structure, and that the degree of hydrogen bonding in ASC was higher than PSC. All the extracted collagens could aggregate into fibrils with D-periodicity. The fibril formation rate of ASC-RP and PSC-RP was slightly higher than ASC-TP and PSC-TP. Turbidity analysis revealed an increase in fibril formation rate when adding a low concentration of NaCl (less than 300 mM). The fibril formation ability was suppressed with further increasing of NaCl concentration, as illustrated by a reduction in the turbidity and formation degree. SEM analysis confirmed the well-formed interwoven structure of collagen fibrils after 24 h of incubation. Summarizing the experimental results suggested that the extracted collagens from the skin of river puffer and tiger puffer could be considered a viable substitute to mammalian-derived collagens for further use in biomaterial applications.
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Affiliation(s)
- Shan-Shan Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Ying Yu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Yong Sun
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Nan Liu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - De-Qing Zhou
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China.
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26
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Yuan B, Sun H, Zhao S, Yang H, Wang P, Li P, Sun H, Jason Niu Q. Semi-aromatic polyamide nanofiltration membranes with tuned surface charge and pore size distribution designed for the efficient removal of Ca2+ and Mg2+. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.03.063] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Zhang L, Feng KC, Yu Y, Chuang YC, Chang CC, Vadada S, Patel R, Singh V, Simon M, Rafailovich M. Effect of Graphene on Differentiation and Mineralization of Dental Pulp Stem Cells in Poly(4-vinylpyridine) Matrix in Vitro. ACS APPLIED BIO MATERIALS 2019; 2:2435-2443. [DOI: 10.1021/acsabm.9b00127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Linxi Zhang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- ThINC Facility, Advanced Energy Center, Stony Brook University, Stony Brook, New York 11794, United States
| | - Kuan-Che Feng
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Yingjie Yu
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Ya-Chen Chuang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- ThINC Facility, Advanced Energy Center, Stony Brook University, Stony Brook, New York 11794, United States
| | - Chung-Chueh Chang
- ThINC Facility, Advanced Energy Center, Stony Brook University, Stony Brook, New York 11794, United States
| | - Sahith Vadada
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Rushikesh Patel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Vedant Singh
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Marcia Simon
- Department of Oral Biology and Pathology, University School of Dental Medicine, Stony Brook University, Stony Brook, New York 11794, United States
| | - Miriam Rafailovich
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
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Rasheeda K, Muvva C, Fathima NN. Governing the Inhibition of Reconstituted Collagen Type I Assemblies Mediated Through Noncovalent Forces of (±)-α Lipoic Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:980-989. [PMID: 30621400 DOI: 10.1021/acs.langmuir.8b03539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Type I collagen is a fibrous protein, which is highly biocompatible and biodegradable and exhibits low immunogenicity with its unique feature of undergoing a spontaneous self-assembly process. However, the excessive accumulation of collagen may lead to a condition known as fibrosis in vertebrates. Recently, saturated fatty acids have gained much attention as biomedical and therapeutic agents. Therefore, drawing inspiration from the biological and structural tunability of these fatty acids, this work aims to inhibit the self-assembly of type I collagen using (±)-α-lipoic acid (ALA). Reconstituted collagen and its blends with (±)-ALA under physiological conditions were subjected to fibril growth kinetics measurements, which exhibited the decrease in the rate of fibrillogenesis ( t1/2) with an increase in the concentration of ALA. Variations in the viscoelasticity of collagen and ALA blend with respect to rate and frequency showed significant changes. Further, the frequency shifts of different functional groups via FT-IR (ATR) and the morphological changes associated with fibril inhibition were visualized using a cryoscanning electron microscope. Molecular dynamics simulation of the collagen-like peptide with the (±)-ALA molecule at different molar ratios proved that (±)-ALA had a strong potential to bind at various sites of collagen mediated by conventional secondary or noncovalent forces. Thus, the protein-small molecule interaction dominates the forces prevailing between protein-protein binding, leading to the inhibition of the self-assembly process. Such inhibitory effects by a fatty acid may unfold newer avenues for development of targeted and sustainable drug delivery systems for fibrotic diseases.
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Affiliation(s)
- K Rasheeda
- Inorganic and Physical Chemistry Laboratory , Central Leather Research Institute, Council of Scientific and Industrial Research , Chennai 600020 , India
| | - Charuvaka Muvva
- Inorganic and Physical Chemistry Laboratory , Central Leather Research Institute, Council of Scientific and Industrial Research , Chennai 600020 , India
| | - Nishter Nishad Fathima
- Inorganic and Physical Chemistry Laboratory , Central Leather Research Institute, Council of Scientific and Industrial Research , Chennai 600020 , India
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29
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Rezaei N, Lyons A, Forde NR. Environmentally Controlled Curvature of Single Collagen Proteins. Biophys J 2018; 115:1457-1469. [PMID: 30269884 DOI: 10.1016/j.bpj.2018.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 08/02/2018] [Accepted: 09/04/2018] [Indexed: 12/01/2022] Open
Abstract
The predominant structural protein in vertebrates is collagen, which plays a key role in extracellular matrix and connective tissue mechanics. Despite its prevalence and physical importance in biology, the mechanical properties of molecular collagen are far from established. The flexibility of its triple helix is unresolved, with descriptions from different experimental techniques ranging from flexible to semirigid. Furthermore, it is unknown how collagen type (homo- versus heterotrimeric) and source (tissue derived versus recombinant) influence flexibility. Using SmarTrace, a chain-tracing algorithm we devised, we performed statistical analysis of collagen conformations collected with atomic force microscopy to determine the protein's mechanical properties. Our results show that types I, II, and III collagens-the key fibrillar varieties-exhibit similar molecular flexibilities. However, collagen conformations are strongly modulated by salt, transitioning from compact to extended as KCl concentration increases in both neutral and acidic pH. Although analysis with a standard worm-like chain model suggests that the persistence length of collagen can attain a wide range of values within the literature range, closer inspection reveals that this modulation of collagen's conformational behavior is not due to changes in flexibility but rather arises from the induction of curvature (either intrinsic or induced by interactions with the mica surface). By modifying standard polymer theory to include innate curvature, we show that collagen behaves as an equilibrated curved worm-like chain in two dimensions. Analysis within the curved worm-like chain model shows that collagen's curvature depends strongly on pH and salt, whereas its persistence length does not. Thus, we find that triple-helical collagen is well described as semiflexible irrespective of source, type, pH, and salt environment. These results demonstrate that collagen is more flexible than its conventional description as a rigid rod, which may have implications for its cellular processing and secretion.
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Affiliation(s)
- Nagmeh Rezaei
- Department of Physics, Simon Fraser University, Burnaby, Canada
| | - Aaron Lyons
- Department of Physics, Simon Fraser University, Burnaby, Canada
| | - Nancy R Forde
- Department of Physics, Simon Fraser University, Burnaby, Canada.
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30
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Simon P, Grüner D, Worch H, Pompe W, Lichte H, El Khassawna T, Heiss C, Wenisch S, Kniep R. First evidence of octacalcium phosphate@osteocalcin nanocomplex as skeletal bone component directing collagen triple-helix nanofibril mineralization. Sci Rep 2018; 8:13696. [PMID: 30209287 PMCID: PMC6135843 DOI: 10.1038/s41598-018-31983-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 08/29/2018] [Indexed: 01/27/2023] Open
Abstract
Tibia trabeculae and vertebrae of rats as well as human femur were investigated by high-resolution TEM at the atomic scale in order to reveal snapshots of the morphogenetic processes of local bone ultrastructure formation. By taking into account reflections of hydroxyapatite for Fourier filtering the appearance of individual alpha-chains within the triple-helix clearly shows that bone bears the feature of an intergrowth composite structure extending from the atomic to the nanoscale, thus representing a molecular composite of collagen and apatite. Careful Fourier analysis reveals that the non-collagenous protein osteocalcin is present directly combined with octacalcium phosphate. Besides single spherical specimen of about 2 nm in diameter, osteocalcin is spread between and over collagen fibrils and is often observed as pearl necklace strings. In high-resolution TEM, the three binding sites of the γ-carboxylated glutamic acid groups of the mineralized osteocalcin were successfully imaged, which provide the chemical binding to octacalcium phosphate. Osteocalcin is attached to the collagen structure and interacts with the Ca-sites on the (100) dominated hydroxyapatite platelets with Ca-Ca distances of about 9.5 Å. Thus, osteocalcin takes on the functions of Ca-ion transport and suppression of hydroxyapatite expansion.
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Affiliation(s)
- Paul Simon
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187, Dresden, Germany.
| | - Daniel Grüner
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, IEK-2, 52425, Jülich, Germany
| | - Hartmut Worch
- Institute of Materials Science, Technical University of Dresden, Helmholtzstr. 7, 01069, Dresden, Germany
| | - Wolfgang Pompe
- Institute of Materials Science, Technical University of Dresden, Helmholtzstr. 7, 01069, Dresden, Germany
| | - Hannes Lichte
- Institute of Structure Physics, Technical University of Dresden, Zum Triebenberg 50, 01328, Dresden Zaschendorf, Germany
| | - Thaqif El Khassawna
- Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig University of Giessen, Aulweg 128, Giessen, 35392, Germany
| | - Christian Heiss
- Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig University of Giessen, Aulweg 128, Giessen, 35392, Germany
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital of Giessen-Marburg, Giessen, Germany
| | - Sabine Wenisch
- Clinic of Small animals, c/o Institute of Veterinary Anatomy, Justus-Liebig University of Giessen, Giessen, Germany
| | - Rüdiger Kniep
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187, Dresden, Germany
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31
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Shen L, Bu H, Yang H, Liu W, Li G. Investigation on the behavior of collagen self-assembly in vitro via adding sodium silicate. Int J Biol Macromol 2018; 115:635-642. [DOI: 10.1016/j.ijbiomac.2018.04.074] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/10/2018] [Accepted: 04/13/2018] [Indexed: 10/17/2022]
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32
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Arroyo R, Martín-González A, Echaide M, Jain A, Brondyk W, Rosenbaum J, Moreno-Herrero F, Pérez-Gil J. Supramolecular Assembly of Human Pulmonary Surfactant Protein SP-D. J Mol Biol 2018; 430:1495-1509. [DOI: 10.1016/j.jmb.2018.03.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/26/2018] [Accepted: 03/26/2018] [Indexed: 11/15/2022]
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33
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Tashima T, Nagatoishi S, Caaveiro JMM, Nakakido M, Sagara H, Kusano-Arai O, Iwanari H, Mimuro H, Hamakubo T, Ohnuma SI, Tsumoto K. Molecular basis for governing the morphology of type-I collagen fibrils by Osteomodulin. Commun Biol 2018; 1:33. [PMID: 30271919 PMCID: PMC6123635 DOI: 10.1038/s42003-018-0038-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 03/23/2018] [Indexed: 02/07/2023] Open
Abstract
Small leucine-rich repeat proteoglycan (SLRP) proteins have an important role in the organization of the extracellular matrix, especially in the formation of collagen fibrils. However, the mechanism governing the shape of collagen fibrils is poorly understood. Here, we report that the protein Osteomodulin (OMD) of the SLRP family is a monomeric protein in solution that interacts with type-I collagen. This interaction is dominated by weak electrostatic forces employing negatively charged residues of OMD, in particular Glu284 and Glu303, and controlled by entropic factors. The protein OMD establishes a fast-binding equilibrium with collagen, where OMD may engage not only with individual collagen molecules, but also with the growing fibrils. This weak electrostatic interaction is carefully balanced so it modulates the shape of the fibrils without compromising their viability. Takumi Tashima and colleagues provide structural insights into how collagen fibrils are shaped by Osteomodulin. Osteomodulin keeps a fast-binding equilibrium with the collagen fibrils to slow down its growth, promoting the formation of uniform, intact collagen fibrils.
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Affiliation(s)
- Takumi Tashima
- Department of Chemistry & Biotechnology, School of Engineering, The University of Tokyo, Tokyo, 108-8639, Japan
| | - Satoru Nagatoishi
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, 108-8639, Japan.,Project Division of Advanced Biopharmaceutical Science, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan.,Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan
| | - Jose M M Caaveiro
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, 108-8639, Japan.,Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan.,Laboratory of Global Healthcare, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Makoto Nakakido
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, 108-8639, Japan.,Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan
| | - Hiroshi Sagara
- Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan
| | - Osamu Kusano-Arai
- Quantitative Biology and Medicine, Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Tokyo, 153-8904, Japan
| | - Hiroko Iwanari
- Quantitative Biology and Medicine, Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Tokyo, 153-8904, Japan
| | - Hitomi Mimuro
- Department of Infection Microbiology, Research Institute for Microbial Diseases, Osaka University, Osaka, 565-0871, Japan.,Department of Infectious Diseases Control, International Research Center for Infectious Diseases, Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan
| | - Takao Hamakubo
- Quantitative Biology and Medicine, Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Tokyo, 153-8904, Japan
| | - Shin-Ichi Ohnuma
- Institute of Ophthalmology, University College London (UCL), London, EC1V 9EL, UK
| | - Kouhei Tsumoto
- Department of Chemistry & Biotechnology, School of Engineering, The University of Tokyo, Tokyo, 108-8639, Japan. .,Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, 108-8639, Japan. .,Medical Proteomics Laboratory, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan.
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34
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Kalbitzer L, Pompe T. Fibril growth kinetics link buffer conditions and topology of 3D collagen I networks. Acta Biomater 2018; 67:206-214. [PMID: 29208553 DOI: 10.1016/j.actbio.2017.11.051] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 11/14/2017] [Accepted: 11/28/2017] [Indexed: 12/12/2022]
Abstract
Three-dimensional fibrillar networks reconstituted from collagen I are widely used as biomimetic scaffolds for in vitro and in vivo cell studies. Various physicochemical parameters of buffer conditions for in vitro fibril formation are well known, including pH-value, ion concentrations and temperature. However, there is a lack of a detailed understanding of reconstituting well-defined 3D network topologies, which is required to mimic specific properties of the native extracellular matrix. We screened a wide range of relevant physicochemical buffer conditions and characterized the topology of the reconstituted 3D networks in terms of mean pore size and fibril diameter. A congruent analysis of fibril formation kinetics by turbidimetry revealed the adjustment of the lateral growth phase of fibrils by buffer conditions to be key in the determination of pore size and fibril diameter of the networks. Although the kinetics of nucleation and linear growth phase were affected by buffer conditions as well, network topology was independent of those two growth phases. Overall, the results of our study provide necessary insights into how to engineer 3D collagen matrices with an independent control over topology parameters, in order to mimic in vivo tissues in in vitro experiments and tissue engineering applications. STATEMENT OF SIGNIFICANCE The study reports a comprehensive analysis of physicochemical conditions of buffer solutions to reconstitute defined 3D collagen I matrices. By a combined analysis of network topology, i.e., pore size and fibril diameter, and the kinetics of fibril formation we can reveal the dependence of 3D network topology on buffer conditions, such as pH-value, phosphate concentration and sodium chloride content. With those results we are now able to provide engineering strategies to independently tune the topology parameters of widely used 3D collagen scaffolds based on the buffer conditions. By that, we enable the straightforward mimicking of extracellular matrices of in vivo tissues for in vitro cell culture experiments and tissue engineering applications.
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Development of Multilayered Chlorogenate-Peptide Based Biocomposite Scaffolds for Potential Applications in Ligament Tissue Engineering - An <i>In Vitro</i> Study. JOURNAL OF BIOMIMETICS BIOMATERIALS AND BIOMEDICAL ENGINEERING 2017. [DOI: 10.4028/www.scientific.net/jbbbe.34.37] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, for the first time, chlorogenic acid, a natural phytochemical, was conjugated to a lactoferrin derived antimicrobial peptide sequence RRWQWRMKKLG to develop a self-assembled template. To mimic the components of extracellular matrix, we then incorporated Type I Collagen, followed by a sequence of aggrecan peptide (ATEGQVRVNSIYQDKVSL) onto the self-assembled templates for potential applications in ligament tissue regeneration. Mechanical properties and surface roughness were studied and the scaffolds displayed a Young’s Modulus of 169 MP and an average roughness of 72 nm respectively. Thermal phase changes were studied by DSC analysis. Results showed short endothermic peaks due to water loss and an exothermic peak due to crystallization of the scaffold caused by rearrangement of the components. Biodegradability studies indicated a percent weight loss of 27.5 % over a period of 37 days. Furthermore, the scaffolds were found to adhere to fibroblasts, the main cellular component of ligament tissue. The scaffolds promoted cell proliferation and displayed actin stress fibers indicative of cell motility and attachment. Collagen and proteoglycan synthesis were also promoted, demonstrating increased expression and deposition of collagen and proteoglycans. Additionally, the scaffolds exhibited antimicrobial activity against Staphylococcus epidermis bacteria, which is beneficial for minimizing biofilm formation if potentially used as implants. Thus, we have developed a novel biocomposite that may open new avenues to enhance ligament tissue regeneration.
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36
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Phase Behaviour and Miscibility Studies of Collagen/Silk Fibroin Macromolecular System in Dilute Solutions and Solid State. Molecules 2017; 22:molecules22081368. [PMID: 28820488 PMCID: PMC6152308 DOI: 10.3390/molecules22081368] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 08/16/2017] [Indexed: 12/29/2022] Open
Abstract
Miscibility is an important issue in biopolymer blends for analysis of the behavior of polymer pairs through the detection of phase separation and improvement of the mechanical and physical properties of the blend. This study presents the formulation of a stable and one-phase mixture of collagen and regenerated silk fibroin (RSF), with the highest miscibility ratio between these two macromolecules, through inducing electrostatic interactions, using salt ions. For this aim, a ternary phase diagram was experimentally built for the mixtures, based on observations of phase behavior of blend solutions with various ratios. The miscibility behavior of the blend solutions in the miscible zones of the phase diagram was confirmed quantitatively by viscosimetric measurements. Assessing the effects of biopolymer mixing ratio and salt ions, before and after dialysis of blend solutions, revealed the importance of ion-specific interactions in the formation of coacervate-based materials containing collagen and RSF blends that can be used in pharmaceutical, drug delivery, and biomedical applications. Moreover, the conformational change of silk fibroin from random coil to beta sheet, in solution and in the final solid films, was detected by circular dichroism (CD) and Fourier transform infrared spectroscopy (FTIR), respectively. Scanning electron microscopy (SEM) exhibited alterations of surface morphology for the biocomposite films with different ratios. Surface contact angle measurement illustrated different hydrophobic properties for the blended film surfaces. Differential scanning calorimetry (DSC) showed that the formation of the beta sheet structure of silk fibroin enhances the thermal stability of the final blend films. Therefore, the novel method presented in this study resulted in the formation of biocomposite films whose physico-chemical properties can be tuned by silk fibroin conformational changes by applying different component mixing ratios.
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37
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Romero-Sánchez LB, Borrego-González S, Díaz-Cuenca A. High surface area biopolymeric-ceramic scaffolds for hard tissue engineering. Biomed Phys Eng Express 2017. [DOI: 10.1088/2057-1976/aa7001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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38
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Eriksen AZ, Brewer J, Andresen TL, Urquhart AJ. The diffusion dynamics of PEGylated liposomes in the intact vitreous of the ex vivo porcine eye: A fluorescence correlation spectroscopy and biodistribution study. Int J Pharm 2017; 522:90-97. [PMID: 28267579 DOI: 10.1016/j.ijpharm.2017.03.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 02/25/2017] [Accepted: 03/01/2017] [Indexed: 01/22/2023]
Abstract
The diffusion dynamics of nanocarriers in the vitreous and the influence of nanocarrier physicochemical properties on these dynamics is an important aspect of the efficacy of intravitreal administered nanomedicines for the treatment of posterior segment eye diseases. Here we use fluorescence correlation spectroscopy (FCS) to determine liposome diffusion coefficients in the intact vitreous (DVit) of ex vivo porcine eyes using a modified Miyake-Apple technique to minimize the disruption of the vitreous fine structure. We chose to investigate whether the zeta potential of polyethylene glycol functionalized (i.e. PEGylated) liposomes altered liposome in situ diffusion dynamics in the vitreous. Non-PEGylated cationic nanocarriers have previously shown little to no diffusion in the vitreous, whilst neutral and anionic have shown diffusion. The liposomes investigated had diameters below 150nm and zeta potentials ranging from -20 to +12mV. We observed that PEGylated cationic liposomes had significantly lower DVit values (1.14μm2s-1) than PEGylated neutral and anionic liposomes (2.78 and 2.87μm2s-1). However, PEGylated cationic liposomes had a similar biodistribution profile across the vitreous to the other systems. These results show that PEGylated cationic liposomes with limited cationic charge can diffuse across the vitreous and indicate that the vitreous as a barrier to nanocarriers (Ø<500nm) is more complicated than simply an electrostatic barrier as previously suggested.
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Affiliation(s)
- Anne Z Eriksen
- Department for Micro- and Nanotechnology, Technical University of Denmark, Building 345C, 2800 Kgs. Lyngby, Denmark
| | - Jonathan Brewer
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - Thomas L Andresen
- Department for Micro- and Nanotechnology, Technical University of Denmark, Building 345C, 2800 Kgs. Lyngby, Denmark
| | - Andrew J Urquhart
- Department for Micro- and Nanotechnology, Technical University of Denmark, Building 345C, 2800 Kgs. Lyngby, Denmark.
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Wu S, Gu L, Huang Z, Sun Q, Chen H, Ling J, Mai S. Intrafibrillar mineralization of polyacrylic acid-bound collagen fibrils using a two-dimensional collagen model and Portland cement-based resins. Eur J Oral Sci 2016; 125:72-80. [PMID: 27996182 DOI: 10.1111/eos.12319] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2016] [Indexed: 11/29/2022]
Abstract
The biomimetic remineralization of apatite-depleted dentin is a potential method for enhancing the durability of resin-dentin bonding. To advance this strategy from its initial proof-of-concept design, we sought to investigate the characteristics of polyacrylic acid (PAA) adsorption to desorption from type I collagen and to test the mineralization ability of PAA-bound collagen. Portland cement and β-tricalcium phosphate (β-TCP) were homogenized with a hydrophilic resin blend to produce experimental resins. The collagen fibrils reconstituted on nickel (Ni) grids were mineralized using different methods: (i) group I consisted of collagen treated with Portland cement-based resin in simulated body fluid (SBF); (ii) group II consisted of PAA-bound collagen treated with Portland cement-based resin in SBF; and (iii) group III consisted of PAA-bound collagen treated with β-TCP-doped Portland cement-based resin in deionized water. Intrafibrillar mineralization was evaluated using transmission electron microscopy. We found that a carbonyl-associated peak at pH 3.0 increased as adsorption time increased, whereas a hydrogen bond-associated peak increased as desorption time increased. The experimental resins maintained an alkaline pH and the continuous release of calcium ions. Apatite was detected within PAA-bound collagen in groups II and III. Our results suggest that PAA-bound type I collagen fibrils can be mineralized using Portland cement-based resins.
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Affiliation(s)
- Shiyu Wu
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Lisha Gu
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Zihua Huang
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Qiurong Sun
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Huimin Chen
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Junqi Ling
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Sui Mai
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China
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40
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Pawelec KM, Best SM, Cameron RE. Collagen: a network for regenerative medicine. J Mater Chem B 2016; 4:6484-6496. [PMID: 27928505 PMCID: PMC5123637 DOI: 10.1039/c6tb00807k] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 08/20/2016] [Indexed: 12/28/2022]
Abstract
The basic building block of the extra-cellular matrix in native tissue is collagen. As a structural protein, collagen has an inherent biocompatibility making it an ideal material for regenerative medicine. Cellular response, mediated by integrins, is dictated by the structure and chemistry of the collagen fibers. Fiber formation, via fibrillogenesis, can be controlled in vitro by several factors: pH, ionic strength, and collagen structure. After formation, fibers are stabilized via cross-linking. The final bioactivity of collagen scaffolds is a result of both processes. By considering each step of fabrication, scaffolds can be tailored for the specific needs of each tissue, improving their therapeutic potential.
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Affiliation(s)
- K M Pawelec
- University of Michigan , 2350 Hayward Ave , Ann Arbor , MI 48109 , USA
| | - S M Best
- Cambridge Centre for Medical Materials , University of Cambridge , Cambridge , CB3 0FS , UK .
| | - R E Cameron
- Cambridge Centre for Medical Materials , University of Cambridge , Cambridge , CB3 0FS , UK .
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41
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Kezwoń A, Góral I, Frączyk T, Wojciechowski K. Effect of surfactants on surface activity and rheological properties of type I collagen at air/water interface. Colloids Surf B Biointerfaces 2016; 148:238-248. [PMID: 27616064 DOI: 10.1016/j.colsurfb.2016.08.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/25/2016] [Accepted: 08/30/2016] [Indexed: 01/22/2023]
Abstract
We describe the effect of three synthetic surfactants (anionic - sodium dodecyl sulfate (SDS), cationic - cetyltrimethylammonium bromide (CTAB) and nonionic - Triton X-100 (TX-100)) on surface properties of the type I calf skin collagen at the air/water interface in acidic solutions (pH 1.8). The protein concentration was fixed at 5×10-6molL-1 and the surfactant concentration was varied in the range 5×10-6molL-1-1×10-4molL-1, producing the protein/surfactant mixtures with molar ratios of 1:1, 1:2, 1:5, 1:10 and 1:20. An Axisymmetric Drop Shape Analysis (ADSA) method was used to determine the dynamic surface tension and surface dilatational moduli of the mixed adsorption layers. Two spectroscopic techniques: UV-vis spectroscopy and fluorimetry allowed us to determine the effect of the surfactants on the protein structure. The thermodynamic characteristic of the mixtures was studied using isothermal titration calorimetry (ITC) and differential scanning calorimetry (DSC). Modification of the collagen structure by SDS at low surfactant/protein ratios has a positive effect on the mixture's surface activity with only minor deterioration of the rheological properties of the adsorbed layers. The collagen/CTAB mixtures do not show that pronounced improvement in surface activity, while rheological properties are significantly deteriorated. The mixtures with non-ionic TX-100 do not show any synergistic effects in surface activity.
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Affiliation(s)
- Aleksandra Kezwoń
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland
| | - Ilona Góral
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland
| | - Tomasz Frączyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Kamil Wojciechowski
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland.
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42
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Latorre ME, Lifschitz AL, Purslow PP. New recommendations for measuring collagen solubility. Meat Sci 2016; 118:78-81. [DOI: 10.1016/j.meatsci.2016.03.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 03/16/2016] [Accepted: 03/21/2016] [Indexed: 12/01/2022]
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43
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Parmar PA, St-Pierre JP, Chow LW, Puetzer JL, Stoichevska V, Peng YY, Werkmeister JA, Ramshaw JAM, Stevens MM. Harnessing the Versatility of Bacterial Collagen to Improve the Chondrogenic Potential of Porous Collagen Scaffolds. Adv Healthc Mater 2016; 5:1656-66. [PMID: 27219220 PMCID: PMC5405340 DOI: 10.1002/adhm.201600136] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 03/09/2016] [Indexed: 12/21/2022]
Abstract
Collagen I foams are used in the clinic as scaffolds to promote articular cartilage repair as they provide a bioactive environment for cells with chondrogenic potential. However, collagen I as a base material does not allow for precise control over bioactivity. Alternatively, recombinant bacterial collagens can be used as "blank slate" collagen molecules to offer a versatile platform for incorporation of selected bioactive sequences and fabrication into 3D scaffolds. Here, we show the potential of Streptococcal collagen-like 2 (Scl2) protein foams modified with peptides designed to specifically and noncovalently bind hyaluronic acid and chondroitin sulfate to improve chondrogenesis of human mesenchymal stem cells (hMSCs) compared to collagen I foams. Specific compositions of functionalized Scl2 foams lead to improved chondrogenesis compared to both nonfunctionalized Scl2 and collagen I foams, as indicated by gene expression, extracellular matrix accumulation, and compression moduli. hMSCs cultured in functionalized Scl2 foams exhibit decreased collagens I and X gene and protein expression, suggesting an advantage over collagen I foams in promoting a chondrocytic phenotype. These highly modular foams can be further modified to improve specific aspects chondrogenesis. As such, these scaffolds also have the potential to be tailored for other regenerative medicine applications.
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Affiliation(s)
- Paresh A. Parmar
- Department of Materials, Department of Bioengineering, Institute of Biomedical Engineering, Imperial College London SW7 2AZ, UK; The Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Bayview Avenue, Clayton, Victoria 3169, Australia
| | - Jean-Philippe St-Pierre
- Department of Bioengineering Institute of Biomedical Engineering Imperial College London, SW7 2AZ, UK
| | - Lesley W. Chow
- Department of Bioengineering Institute of Biomedical Engineering Imperial College London, SW7 2AZ, UK
| | - Jennifer L. Puetzer
- Department of Bioengineering Institute of Biomedical Engineering Imperial College London, SW7 2AZ, UK
| | - Violet Stoichevska
- The Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Bayview Avenue, Clayton, Victoria 3169, Australia
| | - Yong Y. Peng
- The Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Bayview Avenue, Clayton, Victoria 3169, Australia
| | - Jerome A. Werkmeister
- The Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Bayview Avenue, Clayton, Victoria 3169, Australia
| | - John A. M. Ramshaw
- The Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Bayview Avenue, Clayton, Victoria 3169, Australia
| | - Molly M. Stevens
- Department of Bioengineering Institute of Biomedical Engineering Imperial College London, SW7 2AZ, UK
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Parmar AS, James JK, Grisham DR, Pike DH, Nanda V. Dissecting Electrostatic Contributions to Folding and Self-Assembly Using Designed Multicomponent Peptide Systems. J Am Chem Soc 2016; 138:4362-7. [PMID: 26966815 DOI: 10.1021/jacs.5b10304] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We investigate formation of nano- to microscale peptide fibers and sheets where assembly requires association of two distinct collagen mimetic peptides (CMPs). The multicomponent nature of these designs allows the decoupling of amino acid contributions to peptide folding versus higher-order assembly. While both arginine and lysine containing CMP sequences can favor triple-helix folding, only arginine promotes rapid supramolecular assembly in each of the three two-component systems examined. Unlike lysine, the polyvalent guanidyl group of arginine is capable of both intra- and intermolecular contacts, promoting assembly. This is consistent with the supramolecular diversity of CMP morphologies observed throughout the literature. It also connects CMP self-assembly with a broad range of biomolecular interaction phenomena, providing general principles for modeling and design.
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Affiliation(s)
- Avanish S Parmar
- Department of Physics, Indian Institute of Technology (Banaras Hindu University) , Varanasi 221005, Uttar Pradesh, India
| | - Jose K James
- Center for Advanced Biotechnology and Medicine, Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers University , 679 Hoes Lane West, Piscataway, New Jersey 08854, United States
| | - Daniel R Grisham
- Center for Advanced Biotechnology and Medicine, Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers University , 679 Hoes Lane West, Piscataway, New Jersey 08854, United States
| | - Douglas H Pike
- Center for Advanced Biotechnology and Medicine, Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers University , 679 Hoes Lane West, Piscataway, New Jersey 08854, United States
| | - Vikas Nanda
- Center for Advanced Biotechnology and Medicine, Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers University , 679 Hoes Lane West, Piscataway, New Jersey 08854, United States
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45
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Rother S, Salbach-Hirsch J, Moeller S, Seemann T, Schnabelrauch M, Hofbauer LC, Hintze V, Scharnweber D. Bioinspired Collagen/Glycosaminoglycan-Based Cellular Microenvironments for Tuning Osteoclastogenesis. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23787-23797. [PMID: 26452150 DOI: 10.1021/acsami.5b08419] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Replicating the biocomplexity of native extracellular matrices (ECM) is critical for a deeper understanding of biochemical signals influencing bone homeostasis. This will foster the development of bioinspired biomaterials with adjustable bone-inducing properties. Collagen-based coatings containing single HA derivatives have previously been reported to promote osteogenic differentiation and modulate osteoclastogenesis and resorption depending on their sulfation degree. However, the potential impact of different GAG concentrations as well as the interplay of multiple GAGs in these coatings is not characterized in detail to date. These aspects were addressed in the current study by integrating HA and different sulfate-modified HA derivatives (sHA) during collagen in vitro fibrillogenesis. Besides cellular microenvironments with systematically altered single-GAG concentrations, matrices containing both low and high sHA (sHA1, sHA4) were characterized by biochemical analysis such as agarose gel electrophoresis, performed for the first time with sHA derivatives. The morphology and composition of the collagen coatings were altered in a GAG sulfation- and concentration-dependent manner. In multi-GAG microenvironments, atomic force microscopy revealed intermediate collagen fibril structures with thin fibrils and microfibrils. GAG sulfation altered the surface charge of the coatings as demonstrated by ζ-potential measurements revealed for the first time as well. This highlights the prospect of GAG-containing matrices to adjust defined surface charge properties. The sHA4- and the multi-GAG coatings alike significantly enhanced the viability of murine osteoclast-precursor-like RAW264.7 cells. Although in single-GAG matrices there was no dose-dependent effect on cell viability, osteoclastogenesis was significantly suppressed only on sHA4-coatings in a dose-dependent fashion. The multi-GAG coatings led to an antiosteoclastogenic effect in-between those with single-GAGs which cannot simply be attributed to the overall content of sulfate groups. These data suggest that the interplay of sGAGs influences bone cell behavior. Whether these findings translate into favorable biomaterial properties needs to be validated in vivo.
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Affiliation(s)
- Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , Budapester Straße 27, 01069 Dresden, Germany
| | - Juliane Salbach-Hirsch
- Division of Endocrinology, Diabetes, and Bone Diseases of Medicine III, Technische Universität Dresden Medical Center , Fetscherstraße 74, 01307 Dresden, Germany
| | - Stephanie Moeller
- Biomaterials Department, INNOVENT e.V. , Prüssingstraße 27 B, 07745 Jena, Germany
| | - Thomas Seemann
- Biomaterials Department, INNOVENT e.V. , Prüssingstraße 27 B, 07745 Jena, Germany
| | | | - Lorenz C Hofbauer
- Division of Endocrinology, Diabetes, and Bone Diseases of Medicine III, Technische Universität Dresden Medical Center , Fetscherstraße 74, 01307 Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , Budapester Straße 27, 01069 Dresden, Germany
| | - Dieter Scharnweber
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , Budapester Straße 27, 01069 Dresden, Germany
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46
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Modulation of the rheological properties and microstructure of collagen by addition of co-gelling proteins. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2015.03.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Pompe W, Worch H, Habraken WJEM, Simon P, Kniep R, Ehrlich H, Paufler P. Octacalcium phosphate - a metastable mineral phase controls the evolution of scaffold forming proteins. J Mater Chem B 2015; 3:5318-5329. [PMID: 32262608 DOI: 10.1039/c5tb00673b] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The molecular structure of collagen type 1 can be understood as the result of evolutionary selection in the process of formation of calcium phosphate based biocomposites acting as load bearing components in living organisms. The evolutionary selection fulfills the principle of 'survival of the fittest' in a particular biological environment. Disk-like post-nucleation complexes of Ca2(HPO4)3 2- organized in ribbon-like assemblies in the metastable octacalcium phosphate (OCP) phase, and Ca3 triangles in the stable HAP phase had formed the crystallographic motifs in this selection process. The rotational as well as the translational symmetry of the major tropocollagen (TC) helix agree nearly perfectly with the corresponding symmetries of the OCP structure. The sequence of (Gly-X-Y) motifs of the three α chains constituting the TC molecule enables an optimized structural fit for the nucleation of Ca3 triangles, the directed growth of nanostructured OCP, and the subsequent formation of hydroxyapatite (HAP) in collagen macrofibrils by a topotaxial transition. The known connection between genetic defects of collagen type 1 and Osteogenesis imperfecta should motivate the search for similar dependences of other bone diseases on a disturbed molecular structure of collagen on the genetic scale.
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Affiliation(s)
- Wolfgang Pompe
- Institute of Materials Science, Technical University Dresden, D-01062 Dresden, Germany.
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48
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Oechsle AM, Landenberger M, Gibis M, Irmscher SB, Kohlus R, Weiss J. Modulation of collagen by addition of Hofmeister salts. Int J Biol Macromol 2015; 79:518-26. [PMID: 26014138 DOI: 10.1016/j.ijbiomac.2015.05.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 05/08/2015] [Accepted: 05/09/2015] [Indexed: 10/23/2022]
Abstract
Collagen can be modified by addition of chaotropic or kosmotropic salts of the reversed Hofmeister series. Hence, telopeptide-poor collagen type I was suspended in H2SO4 (pH 2) and 0.05-0.5 M KCl and KNO3 (chaotropes), as well as KI and KSCN (kosmotropes). Rheological parameters, including storage and loss modulus, intrinsic viscosity, and critical overlap concentration, were assessed and the microstructure was characterized by applying confocal laser scanning microscopy and scanning electron microscopy. The addition of up to 0.1 M KCl and 0.05 M KNO3 increased the intrinsic viscosity from 1.22 to 1.51 L/g without salt to a maximal value of 1.74 L/g and decreased the critical overlap concentration from 0.66 to 0.82 g/L to a minimal value of 0.57 g/L. Higher salt concentrations increased the collagen-collagen interactions due to ions withdrawing the water from the collagen molecules. Hence, 0.1 M KSCN delivered the largest structures with the highest structure factor, area value and the highest critical overlap concentration with 17.6 L/g. Overall, 0.5 M salt led to salting out, with chaotropes forming fine precipitates and kosmotropes leading to elastic three-dimensional networks. The study demonstrated that collagen entanglement and microstructure depend strongly on the ionic strength and type of salt.
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Affiliation(s)
- Anja Maria Oechsle
- Department of Food Physics and Meat Science, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany
| | - Markus Landenberger
- Department of Food Physics and Meat Science, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany
| | - Monika Gibis
- Department of Food Physics and Meat Science, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany
| | - Stefan Björn Irmscher
- Department of Food Physics and Meat Science, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany
| | - Reinhard Kohlus
- Department of Food Process Engineering and Food Powders, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany
| | - Jochen Weiss
- Department of Food Physics and Meat Science, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany.
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49
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Far-infrared spectroscopy of salt penetration into a collagen fiber scaffold. J Biol Phys 2015; 41:293-301. [PMID: 25764184 DOI: 10.1007/s10867-015-9379-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 01/19/2015] [Indexed: 10/23/2022] Open
Abstract
We employed far-infrared spectroscopy to observe the amount of salt that penetrates into collagen fiber masses. The absorption properties of collagen sheets prepared from tilapia skin, bovine skin, rat tail, and sea cucumber dermis were measured using a transmission Fourier transform spectrometer in a band from approximately 100 to 700 cm(-1). We confirmed that the absorbance spectra of the four types of dried collagen sheet show good agreement, even though the amino acid compositions differed. The absorbance peaks observed in the band corresponded to collective vibrations of plural functional groups such as methylene and imino groups in collagen. When salt solution was added to the collagen sheets and then dried, the spectral shapes of the sheets at approximately 166 cm(-1) were clearly different from those of the plain collagen sheets. The differential absorbance between wavenumbers 166 cm(-1) and 250 cm(-1) sensitively reflected the difference between higher-order structures, and the salt diffusion (crystallization) depended on the collagen fiber condition. From these results, we consider that spectral changes can be used for the numerical evaluation of salt penetration into a collagen fiber scaffold.
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50
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Kim T, Sridharan I, Zhu B, Orgel J, Wang R. Effect of CNT on collagen fiber structure, stiffness assembly kinetics and stem cell differentiation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:281-289. [PMID: 25686951 DOI: 10.1016/j.msec.2015.01.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 11/07/2014] [Accepted: 01/04/2015] [Indexed: 11/27/2022]
Abstract
Collagen is a native one-dimensional nanomaterial. Carbon nanotube (CNT) was found to interface with biological materials and show promising applications in creating reinforced scaffolds for tissue engineering and regenerative medicine. In this study, we examined the unique role of CNT in collagen fiber structure, mechanical strength and assembly kinetics. The results imply that CNT interacts with collagen at the molecular level. It relaxes the helical coil of collagen fibrils and has the effect of flattening the fibers leading to the elongation of D-period, the characteristic banding feature of collagen fibers. The surface charge of oxidized CNT leads to enhanced local ionic strength during collagen fibrillogenesis, accounting for the slower kinetics of collagen-CNT (COL-CNT) fiber assembly and the formation of thicker fibers. Due to the rigidity of CNT, the addition of CNT increases the fiber stiffness significantly. When applied as a matrix for human decidua parietalis placental stem cells (hdpPSCs) differentiation, COL-CNT was found to support fast and efficient neural differentiation ascribed to the elongated D-period. These results highlight the superiority of CNT to modulate collagen fiber assembly at the molecular level. The study also exemplifies the use of CNT to enhance the functionality of collagen for biological and biomedical applications.
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Affiliation(s)
- Taeyoung Kim
- Department of Biological and Chemical Sciences, Illinois Institute of Technology, 3101S. Dearborn St., Chicago, IL 60616, USA
| | - Indumathi Sridharan
- Department of Biological and Chemical Sciences, Illinois Institute of Technology, 3101S. Dearborn St., Chicago, IL 60616, USA
| | - Bofan Zhu
- Department of Biological and Chemical Sciences, Illinois Institute of Technology, 3101S. Dearborn St., Chicago, IL 60616, USA
| | - Joseph Orgel
- Department of Biological and Chemical Sciences, Illinois Institute of Technology, 3101S. Dearborn St., Chicago, IL 60616, USA
| | - Rong Wang
- Department of Biological and Chemical Sciences, Illinois Institute of Technology, 3101S. Dearborn St., Chicago, IL 60616, USA.
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