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Berasain J, Ávila-Fernández P, Cárdenas-Pérez R, Cànaves-Llabrés AI, Etayo-Escanilla M, Alaminos M, Carriel V, García-García ÓD, Chato-Astrain J, Campos F. Genipin crosslinking promotes biomechanical reinforcement and pro-regenerative macrophage polarization in bioartificial tubular substitutes. Biomed Pharmacother 2024; 174:116449. [PMID: 38518607 DOI: 10.1016/j.biopha.2024.116449] [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: 01/09/2024] [Revised: 03/07/2024] [Accepted: 03/15/2024] [Indexed: 03/24/2024] Open
Abstract
Traumatic nerve injuries are nowadays a significant clinical challenge and new substitutes with adequate biological and mechanical properties are in need. In this context, fibrin-agarose hydrogels (FA) have shown the possibility to generate tubular scaffolds with promising results for nerve repair. However, to be clinically viable, these scaffolds need to possess enhanced mechanical properties. In this line, genipin (GP) crosslinking has demonstrated to improve biomechanical properties with good biological properties compared to other crosslinkers. In this study, we evaluated the impact of different GP concentrations (0.05, 0.1 and 0.2% (m/v)) and reaction times (6, 12, 24, 72 h) on bioartificial nerve substitutes (BNS) consisting of nanostructured FA scaffolds. First, crosslinked BNS were studied histologically, ultrastructurally and biomechanically and then, its biocompatibility and immunomodulatory effects were ex vivo assessed with a macrophage cell line. Results showed that GP was able to improve the biomechanical resistance of BNS, which were dependent on both the GP treatment time and concentration without altering the structure. Moreover, biocompatibility analyses on macrophages confirmed high cell viability and a minimal reduction of their metabolic activity by WST-1. In addition, GP-crosslinked BNS effectively directed macrophage polarization from a pro-inflammatory (M1) towards a pro-regenerative (M2) phenotype, which was in line with the cytokines release profile. In conclusion, this study considers time and dose-dependent effects of GP in FA substitutes which exhibited increased biomechanical properties while reducing immunogenicity and promoting pro-regenerative macrophage shift. These tubular substitutes could be useful for nerve application or even other tissue engineering applications such as urethra.
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Affiliation(s)
- Jone Berasain
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Postgraduate Master Program in Tissue Engineering and Advanced Therapies, University of Granada, Spain
| | - Paula Ávila-Fernández
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Rocío Cárdenas-Pérez
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Postgraduate Master Program in Tissue Engineering and Advanced Therapies, University of Granada, Spain
| | - Antoni Ignasi Cànaves-Llabrés
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Postgraduate Master Program in Tissue Engineering and Advanced Therapies, University of Granada, Spain
| | - Miguel Etayo-Escanilla
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Miguel Alaminos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Víctor Carriel
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Óscar Darío García-García
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain.
| | - Jesús Chato-Astrain
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain.
| | - Fernando Campos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
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Saito-Diaz K, Dietrich P, Wu HF, Sun X, Patel AJ, Wzientek CG, Prudden AR, Boons GJ, Chen S, Studer L, Xu B, Dragatsis I, Zeltner N. Genipin Crosslinks the Extracellular Matrix to Rescue Developmental and Degenerative Defects, and Accelerates Regeneration of Peripheral Neurons. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.22.533831. [PMID: 36993570 PMCID: PMC10055431 DOI: 10.1101/2023.03.22.533831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
The peripheral nervous system (PNS) is essential for proper body function. A high percentage of the population suffer nerve degeneration or peripheral damage. For example, over 40% of patients with diabetes or undergoing chemotherapy develop peripheral neuropathies. Despite this, there are major gaps in the knowledge of human PNS development and therefore, there are no available treatments. Familial Dysautonomia (FD) is a devastating disorder that specifically affects the PNS making it an ideal model to study PNS dysfunction. FD is caused by a homozygous point mutation in ELP1 leading to developmental and degenerative defects in the sensory and autonomic lineages. We previously employed human pluripotent stem cells (hPSCs) to show that peripheral sensory neurons (SNs) are not generated efficiently and degenerate over time in FD. Here, we conducted a chemical screen to identify compounds able to rescue this SN differentiation inefficiency. We identified that genipin, a compound prescribed in Traditional Chinese Medicine for neurodegenerative disorders, restores neural crest and SN development in FD, both in the hPSC model and in a FD mouse model. Additionally, genipin prevented FD neuronal degeneration, suggesting that it could be offered to patients suffering from PNS neurodegenerative disorders. We found that genipin crosslinks the extracellular matrix, increases the stiffness of the ECM, reorganizes the actin cytoskeleton, and promotes transcription of YAP-dependent genes. Finally, we show that genipin enhances axon regeneration in an in vitro axotomy model in healthy sensory and sympathetic neurons (part of the PNS) and in prefrontal cortical neurons (part of the central nervous system, CNS). Our results suggest genipin can be used as a promising drug candidate for treatment of neurodevelopmental and neurodegenerative diseases, and as a enhancer of neuronal regeneration.
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Affiliation(s)
- Kenyi Saito-Diaz
- Center for Molecular Medicine, University of Georgia, Athens GA, USA
| | - Paula Dietrich
- Department of Physiology, The University of Tennessee, Health Science Center, Memphis, TN, USA
| | - Hsueh-Fu Wu
- Center for Molecular Medicine, University of Georgia, Athens GA, USA
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens GA, USA
| | - Xin Sun
- College of Engineering, University of Georgia, Athens GA, USA
| | | | | | | | - Geert-Jan Boons
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA, USA
- Department of Chemistry, University of Georgia, Athens, GA, USA
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands
| | - Shuibing Chen
- Department of Surgery and Department of Biochemistry at Weill Cornell Medical College, New York, NY, USA
- Center for Stem Cell Biology, Sloan Kettering Institute, New York, NY, USA
| | - Lorenz Studer
- Center for Stem Cell Biology, Sloan Kettering Institute, New York, NY, USA
- Department of Developmental Biology, Sloan Kettering Institute, New York, NY, USA
| | - Bingqian Xu
- College of Engineering, University of Georgia, Athens GA, USA
| | - Ioannis Dragatsis
- Department of Physiology, The University of Tennessee, Health Science Center, Memphis, TN, USA
| | - Nadja Zeltner
- Center for Molecular Medicine, University of Georgia, Athens GA, USA
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens GA, USA
- Department of Cellular Biology, University of Georgia, Athens GA, USA
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Mazloomnejad R, Babajani A, Kasravi M, Ahmadi A, Shariatzadeh S, Bahrami S, Niknejad H. Angiogenesis and Re-endothelialization in decellularized scaffolds: Recent advances and current challenges in tissue engineering. Front Bioeng Biotechnol 2023; 11:1103727. [PMID: 36873356 PMCID: PMC9978201 DOI: 10.3389/fbioe.2023.1103727] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 02/09/2023] [Indexed: 02/18/2023] Open
Abstract
Decellularization of tissues and organs has recently become a promising approach in tissue engineering and regenerative medicine to circumvent the challenges of organ donation and complications of transplantations. However, one main obstacle to reaching this goal is acellular vasculature angiogenesis and endothelialization. Achieving an intact and functional vascular structure as a vital pathway for supplying oxygen and nutrients remains the decisive challenge in the decellularization/re-endothelialization procedure. In order to better understand and overcome this issue, complete and appropriate knowledge of endothelialization and its determining variables is required. Decellularization methods and their effectiveness, biological and mechanical characteristics of acellular scaffolds, artificial and biological bioreactors, and their possible applications, extracellular matrix surface modification, and different types of utilized cells are factors affecting endothelialization consequences. This review focuses on the characteristics of endothelialization and how to optimize them, as well as discussing recent developments in the process of re-endothelialization.
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Affiliation(s)
- Radman Mazloomnejad
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amirhesam Babajani
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Kasravi
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Armin Ahmadi
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Siavash Shariatzadeh
- Department of Surgery, University of California Los Angeles, Los Angeles, CA, United States
| | - Soheyl Bahrami
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology in AUVA Research Center, Vienna, Austria
| | - Hassan Niknejad
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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4
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Ma J, Wu F, Liu Z, Fang Y, Chu X, Zheng L, Xue A, Nan K, Qu J, Cheng L. Biomechanical Considerations of Patching Material for Posterior Scleral Reinforcement Surgery. Front Med (Lausanne) 2022; 9:888542. [PMID: 35652073 PMCID: PMC9149161 DOI: 10.3389/fmed.2022.888542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/22/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose To characterize biomechanical properties of genipin-crosslinked human dura mater as reinforcing material for posterior scleral reinforcement (PSR) and to compare it with crosslinked human sclera. Methods Donor dura mater and sclera were crosslinked in the same optimized genipin solution. Resistance to enzyme degradation for both materials were investigated by exposing the materials to accelerated enzyme degrading. Elastic modulus and tensile strength were measured by biomechanics testing equipment. Crosslinked human dura mater was used as reinforcing patch in PSR on 57 adult pathologic myopic eyes. The patients were followed up for an average 3 years. The main outcome was eye globe axial length change and safety profile of the reinforcing material. Results Crosslinked dura mater demonstrated similar percentage weight loss to crosslinked sclera when exposed to enzymatic solution. Dura mater has higher density than sclera. The retaining elastic modulus after enzyme exposure was 72.02 MPa for crosslinked dura mater while 53.88 MPa for crosslinked sclera, 34% greater for crosslinked dura mater, P = 0.0186). At the end of 3 years follow-up, the mean globe axis of the surgery eyes was reduced by 1.29 mm (from 30.81 to 29.51 mm, P < 0.0001, paired t-test). Visual acuity (BCVA logMar) improved by 0.10 logMar unit which is an improvement of five letters (P = 0.0184, paired t-test). No material specific complication was noted. Conclusion Crosslinked human dura mater may be superior to crosslinked human sclera as reinforcing material for PSR to manage progression of high myopia. This material was well tolerated on human eye.
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Affiliation(s)
- Jinlei Ma
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Fangyuan Wu
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Zhiyong Liu
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Yijiong Fang
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Xu Chu
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Linyan Zheng
- Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Anquan Xue
- Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Kaihui Nan
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Jia Qu
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China.,Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Lingyun Cheng
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China.,Jacobs Retina Center at Shiley Eye Institute, University of California, San Diego, La Jolla, La Jolla, CA, United States
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5
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Xing L, Fan YT, Shen LJ, Yang CX, Liu XY, Ma YN, Qi LY, Cho KH, Cho CS, Jiang HL. pH-sensitive and specific ligand-conjugated chitosan nanogels for efficient drug delivery. Int J Biol Macromol 2019; 141:85-97. [DOI: 10.1016/j.ijbiomac.2019.08.237] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 05/26/2019] [Accepted: 08/28/2019] [Indexed: 01/29/2023]
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6
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Li J, Gao W. Fabrication and characterization of 3D microtubular collagen scaffolds for peripheral nerve repair. J Biomater Appl 2019; 33:541-552. [PMID: 30326800 DOI: 10.1177/0885328218804338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Understanding the structure-function relationship in biomaterial constructs is critical in optimizing biological outcomes. For ensheathed structures such as peripheral nerve, engineering implantable tissue substitutes has been challenging. This is due to a unique geometry of thin-walled microtube arrays composed mostly of basement membrane. In this work, we propose a sacrificial templating method to create Matrigel scaffolds that resemble endogenous peripheral nerve. These paralleled microtube constructs possess high void space and membrane-like walls. Additionally, we investigated the effect of chemical crosslinking in altering the physical, mechanical, and biologic properties of Matrigel. Results show that both glutaraldehyde and genipin increased the modulus and failure stress of Matrigel while also improving degradation resistance. However, glutaraldehyde crosslinking induced some cytotoxicity whereas genipin showed good biocompatibility. PC-12 cells, Schwann cells, and primary chick dorsal root ganglia cultured onto microtube scaffolds demonstrated viability up to 10 days. Strong cellular alignment along the channels was observed in Schwann cells whereas neurite outgrowth in primary chick dorsal root ganglia was also biased along the major axis of the microtubes. This suggests that the microtubes may mediate cell orientation and axon pathfinding. This proof of concept study provides a tunable workflow that may be adapted to other collagen types.
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Affiliation(s)
- Jianming Li
- Center for Paralysis Research, Purdue University, West Lafayette, IN USA
| | - Wen Gao
- Center for Paralysis Research, Purdue University, West Lafayette, IN USA
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7
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Yajima Y, Yamada M, Utoh R, Seki M. Collagen Microparticle-Mediated 3D Cell Organization: A Facile Route to Bottom-up Engineering of Thick and Porous Tissues. ACS Biomater Sci Eng 2017; 3:2144-2154. [DOI: 10.1021/acsbiomaterials.7b00131] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Yuya Yajima
- Department of Applied Chemistry
and Biotechnology, Graduate School of Engineering, Chiba University, 1-33
Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Masumi Yamada
- Department of Applied Chemistry
and Biotechnology, Graduate School of Engineering, Chiba University, 1-33
Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Rie Utoh
- Department of Applied Chemistry
and Biotechnology, Graduate School of Engineering, Chiba University, 1-33
Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Minoru Seki
- Department of Applied Chemistry
and Biotechnology, Graduate School of Engineering, Chiba University, 1-33
Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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8
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Pinheiro A, Cooley A, Liao J, Prabhu R, Elder S. Comparison of natural crosslinking agents for the stabilization of xenogenic articular cartilage. J Orthop Res 2016; 34:1037-46. [PMID: 26632206 PMCID: PMC6791374 DOI: 10.1002/jor.23121] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 11/28/2015] [Indexed: 02/04/2023]
Abstract
Osteochondral xenografts are potentially inexpensive, widely available alternatives to fresh allografts. However, antigen removal from xenogenic cartilage may damage the extracellular matrix and reduce compressive stiffness. Non-crosslinked xenogenic cartilage may also undergo rapid enzymatic degradation in vivo. We hypothesized that natural crosslinking agents could be used in place of glutaraldehyde to improve the mechanical properties and enzymatic resistance of decellularized cartilage. This study compared the effects of genipin (GNP), proanthocyanidin (PA), and epigallocatechin gallate (EGCG), on the physical and mechanical properties of decellularized porcine cartilage. Glutaraldehyde (GA) served as a positive control. Porcine articular cartilage discs were decellularized in 2% sodium dodecyl sulfate and DNase I followed by fixation in 0.25% GNP, 0.25% PA, 0.25% EGCG, or 2.5% GA. Decellularization decreased DNA by 15% and GAG by 35%. For natural crosslinkers, the average degree of crosslinking ranged from approximately 50% (EGCG) to 78% (GNP), as compared to 83% for the GA control. Among the natural crosslinkers, only GNP significantly affected the disc diameter, and shrinkage was under 2%. GA fixation had no significant effect on disc diameter. Decellularization decreased aggregate modulus; GA and GNP, but not EGCG and PA, were able to restore it to its original level. GNP, PA, and GA conferred a similar, almost complete resistance to collagenase degradation. EGCG also conferred substantial resistance but to a lesser degree. Overall, the data support our hypothesis and suggest that natural crosslinkers may be suitable alternatives to glutaraldehyde for stabilization of decellularized cartilage. © 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 34:1037-1046, 2016.
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Affiliation(s)
- Amand Pinheiro
- Department of Biomedical Engineering, The University of Akron, Akron, Ohio, 44325, USA
| | - Avery Cooley
- Department of Pathobiology and Population Medicine, Mississippi State University, Starkville, Mississippi, 39762, USA
| | - Jun Liao
- Department of Agricultural & Biological Engineering, Mississippi State University, Starkville, Mississippi, 39762, USA
| | - Raj Prabhu
- Department of Agricultural & Biological Engineering, Mississippi State University, Starkville, Mississippi, 39762, USA
| | - Steven Elder
- Department of Agricultural & Biological Engineering, Mississippi State University, Starkville, Mississippi, 39762, USA
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9
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Genipin cross-linked decellularized tracheal tubular matrix for tracheal tissue engineering applications. Sci Rep 2016; 6:24429. [PMID: 27080716 PMCID: PMC4832209 DOI: 10.1038/srep24429] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 03/22/2016] [Indexed: 12/05/2022] Open
Abstract
Decellularization techniques have been widely used as an alternative strategy for organ reconstruction. This study investigated the mechanical, pro-angiogenic and in vivo biocompatibility properties of decellularized airway matrices cross-linked with genipin. New Zealand rabbit tracheae were decellularized and cross-linked with genipin, a naturally derived agent. The results demonstrated that, a significant (p < 0.05) increase in the secant modulus was computed for the cross-linked tracheae, compared to the decellularized samples. Angiogenic assays demonstrated that decellularized tracheal scaffolds and cross-linked tracheae treated with 1% genipin induce strong in vivo angiogenic responses (CAM analysis). Seven, 15 and 30 days after implantation, decreased (p < 0.01) inflammatory reactions were observed in the xenograft models for the genipin cross-linked tracheae matrices compared with control tracheae, and no increase in the IgM or IgG content was observed in rats. In conclusion, treatment with genipin improves the mechanical properties of decellularized airway matrices without altering the pro-angiogenic properties or eliciting an in vivo inflammatory response.
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10
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Yasuda N, Sekine H, Bise R, Okano T, Shimizu T. Tracing behavior of endothelial cells promotes vascular network formation. Microvasc Res 2015; 105:125-31. [PMID: 26687561 DOI: 10.1016/j.mvr.2015.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 12/08/2015] [Accepted: 12/08/2015] [Indexed: 12/12/2022]
Abstract
The in vitro formation of network structures derived from endothelial cells in grafts before transplantation contributes to earlier engraftment. In a previous study, endothelial cells migrated to form a net-shaped structure in co-culture. However, the specific network formation behavior of endothelial cells during migration remains unclear. In this study, we demonstrated the tracing behavior and cell cycle of endothelial cells using Fucci-labeled (Fluorescent Ubiquitination-based Cell Cycle Indicator) endothelial cells. Here, we observed the co-culture of Fucci-labeled human umbilical vein endothelial cells (HUVECs) together with normal human dermal fibroblasts (NHDFs) using time-lapse imaging and analyzed by multicellular concurrent tracking. In the G0/G1 period, HUVECs migrate faster than in the S/G2/M period, because G0/G1 is the mobile phase and S/G2/M is the proliferation phase in the cell cycle. When HUVECs are co-cultured, they tend to move randomly until they find existing tracks that they then follow to form clusters. Extracellular matrix (ECM) staining showed that collagen IV, laminin and thrombospondin deposited in accordance with endothelial cell networks. Therefore the HUVECs may migrate on the secreted ECM and exhibit tracing behavior, where the HUVECs migrate toward each other. These results suggested that ECM and a cell phase contributed to form a network by accelerating cell migration.
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Affiliation(s)
- Noriko Yasuda
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University (TWIns), Tokyo, Japan
| | - Hidekazu Sekine
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University (TWIns), Tokyo, Japan
| | - Ryoma Bise
- Advanced Business Center, Dai Nippon Printing Co., Ltd., Tokyo, Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University (TWIns), Tokyo, Japan
| | - Tatsuya Shimizu
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University (TWIns), Tokyo, Japan.
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11
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Chavez-Munoz C, Hartwell R, Jalili RB, Ghahary A. Immunoprotective role of IDO in engraftment of allogeneic skin substitutes. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/edm.10.53] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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12
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Cytocompatibility of a silk fibroin tubular scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 34:429-36. [DOI: 10.1016/j.msec.2013.09.039] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 09/18/2013] [Accepted: 09/28/2013] [Indexed: 11/19/2022]
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13
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Martinez AW, Caves JM, Ravi S, Li W, Chaikof EL. Effects of crosslinking on the mechanical properties, drug release and cytocompatibility of protein polymers. Acta Biomater 2014; 10:26-33. [PMID: 23993944 DOI: 10.1016/j.actbio.2013.08.029] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Revised: 07/04/2013] [Accepted: 08/19/2013] [Indexed: 11/30/2022]
Abstract
Recombinant elastin-like protein polymers are increasingly being investigated as component materials of a variety of implantable medical devices. This is chiefly a result of their favorable biological properties and the ability to tailor their physical and mechanical properties. In this report, we explore the potential of modulating the water content, mechanical properties, and drug release profiles of protein films through the selection of different crosslinking schemes and processing strategies. We find that the selection of crosslinking scheme and processing strategy has a significant influence on all aspects of protein polymer films. Significantly, utilization of a confined, fixed volume, as well as vapor-phase crosslinking strategies, decreased protein polymer equilibrium water content. Specifically, as compared to uncrosslinked protein gels, water content was reduced for genipin (15.5%), glutaraldehyde (GTA, 24.5%), GTA vapor crosslinking (31.6%), disulfide (SS, 18.2%) and SS vapor crosslinking (25.5%) (P<0.05). Distinct crosslinking strategies modulated protein polymer stiffness, strain at failure and ultimate tensile strength (UTS). In all cases, vapor-phase crosslinking produced the stiffest films with the highest UTS. Moreover, both confined, fixed volume and vapor-phase approaches influenced drug delivery rates, resulting in decreased initial drug burst and release rates as compared to solution phase crosslinking. Tailored crosslinking strategies provide an important option for modulating the physical, mechanical and drug delivery properties of protein polymers.
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Affiliation(s)
- Adam W Martinez
- Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, GA 30332, USA
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14
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Chan KLS, Khankhel AH, Thompson RL, Coisman BJ, Wong KHK, Truslow JG, Tien J. Crosslinking of collagen scaffolds promotes blood and lymphatic vascular stability. J Biomed Mater Res A 2013; 102:3186-3195. [PMID: 24151175 DOI: 10.1002/jbm.a.34990] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 09/11/2013] [Accepted: 10/02/2013] [Indexed: 11/09/2022]
Abstract
The low stiffness of reconstituted collagen hydrogels has limited their use as scaffolds for engineering implantable tissues. Although chemical crosslinking has been used to stiffen collagen and protect it against enzymatic degradation in vivo, it remains unclear how crosslinking alters the vascularization of collagen hydrogels. In this study, we examine how the crosslinking agents genipin and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide alter vascular stability and function in microfluidic type I collagen gels in vitro. Under moderate perfusion (∼10 dyn/cm(2) shear stress), tubes of blood endothelial cells (ECs) exhibited indistinguishable stability and barrier function in untreated and crosslinked scaffolds. Surprisingly, under low perfusion (∼5 dyn/cm(2) shear stress) or nearly zero transmural pressure, microvessels in crosslinked scaffolds remained stable, while those in untreated gels rapidly delaminated and became poorly perfused. Similarly, tubes of lymphatic ECs under intermittent flow were more stable in crosslinked gels than in untreated ones. These effects correlated well with the degree of mechanical stiffening, as predicted by analysis of fracture energies at the cell-scaffold interface. This work demonstrates that crosslinking of collagen scaffolds does not hinder normal EC physiology; instead, crosslinked scaffolds promote vascular stability. Thus, routine crosslinking of scaffolds may assist in vascularization of engineered tissues.
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Affiliation(s)
- Kelvin L S Chan
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA 02215
| | - Aimal H Khankhel
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA 02215
| | - Rebecca L Thompson
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA 02215
| | - Brent J Coisman
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA 02215
| | - Keith H K Wong
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA 02215
| | - James G Truslow
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA 02215
| | - Joe Tien
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA 02215.,Division of Materials Science and Engineering, Boston University, 15 St. Mary's Street, Brookline, MA 02446
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15
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Abstract
Silk fibroin (SF) has good biocompatibility and has been used to construct small caliber artificial blood vessels. As a vascular graft, the antithrombogenicity is the first important performance. The aim of this study was to evaluate the anticoagulant property of polyethylene glycol diglycidyl ether (PEG-DE) crosslinked and ethanol treated SF materials by investigating the platelet adhesion. Dacron and PTFE were parallel studied as the controls. Results showed that: the platelet adhesion ratios on the ethanol treated SF films were significantly lower than that on the Dacron and PTFE; the platelet adhesion ratios on the PEG-DE crosslinked SF films were higher than that on the ethanol treated SF films and slightly increased with increasing the proportion of the PEG-DE. But the platelet adhesion ratios on all of the PEG-DE crosslinked SF films were significantly lower than that on the controls.
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16
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Hu Y, Liu L, Dan W, Dan N, Gu Z. Evaluation of 1-ethyl-3-methylimidazolium acetate based ionic liquid systems as a suitable solvent for collagen. J Appl Polym Sci 2013. [DOI: 10.1002/app.39298] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yang Hu
- Department of Biomass Chemistry and Engineering; Sichuan University; Chengdu; Sichuan; 610065; China
| | - Lan Liu
- Department of Biomass Chemistry and Engineering; Sichuan University; Chengdu; Sichuan; 610065; China
| | | | - Nianhua Dan
- Department of Biomass Chemistry and Engineering; Sichuan University; Chengdu; Sichuan; 610065; China
| | - Zhipeng Gu
- College of Polymer Science and Engineering; Sichuan University; Chengdu; Sichuan; 610065; China
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17
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Feng H, Zhang L, Zhu C. Genipin crosslinked ethyl cellulose–chitosan complex microspheres for anti-tuberculosis delivery. Colloids Surf B Biointerfaces 2013; 103:530-7. [DOI: 10.1016/j.colsurfb.2012.11.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2012] [Revised: 11/06/2012] [Accepted: 11/10/2012] [Indexed: 10/27/2022]
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18
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Biomodification to dentin by a natural crosslinker improved the resin-dentin bonds. J Dent 2012; 40:458-66. [PMID: 22366684 DOI: 10.1016/j.jdent.2012.02.008] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Revised: 02/06/2012] [Accepted: 02/15/2012] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVES Transient collagen cross-linking treatment by proanthocyanidins (PA), a natural crosslinker, was proved to increase the cross-linking degree and ultimate tensile strength of demineralised dentin. The present study aimed to investigate whether transient pretreatment by PA-based preconditioner can improve the resin-dentin bonds of various etch and rinse adhesives. The influence of solvent type, PA concentration and treatment duration were examined. METHODS PA-based preconditioners were prepared by adding powdered grape seed extract, rich in PA, to various solvents at different concentrations. They were used on demineralised dentin before the application of the bonding agent. Bond strength, failure modes and degree of conversion were evaluated via microtensile testing, field emission scanning electron microscopy and Fourier transform infrared spectroscopy, respectively. RESULTS Collagen cross-linking treatment by PA-based preconditioners presented a concentration- and time-dependent increase in dentin bond strength even in reduced, clinically applicable treatment duration. PA preconditioning improved bond strength of the tested water/ethanol-based adhesive better than the water/acetone-based system. Mixed fracture was the most prevalent failure mode happened on the top of the hybrid layer in PA-pretreated specimens, whilst at the bottom in non-treated controls. The degree of conversion was not significantly affected by PA pretreatment. CONCLUSIONS Transient PA preconditioning improved resin-dentin bonds without compromise on the curing behaviours of the tested adhesives.
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19
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Haag J, Baiguera S, Jungebluth P, Barale D, Del Gaudio C, Castiglione F, Bianco A, Comin CE, Ribatti D, Macchiarini P. Biomechanical and angiogenic properties of tissue-engineered rat trachea using genipin cross-linked decellularized tissue. Biomaterials 2011; 33:780-9. [PMID: 22027598 DOI: 10.1016/j.biomaterials.2011.10.008] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 10/06/2011] [Indexed: 10/15/2022]
Abstract
In this study, the obtainment and characterization of decellularized rat tracheal grafts are described. The detergent-enzymatic method, already used to develop bioengineered pig and human trachea scaffolds, has been applied to rat tracheae in order to obtain airway grafts suitable to be used to improve our knowledge on the process of tissue-engineered airway transplantation and regeneration. The results demonstrated that, after 9 detergent-enzymatic cycles, almost complete decellularized tracheae, retaining the hierarchical and mechanical properties of the native tissues with strong in vivo angiogenic characteristics, could be obtained. Moreover, to improve the mechanical properties of decellularized tracheae, genipin is here considered as a naturally derived cross-linking agent. The results demonstrated that the treatment increased mechanical properties, in term of secant modulus, without neither altering the pro-angiogenic properties of decellularized airway matrices or eliciting an in vivo inflammatory response.
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Affiliation(s)
- Johannes Haag
- BIOAIRLab, University Hospital Careggi, Florence, Italy
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20
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Yoo JS, Kim YJ, Kim SH, Choi SH. Study on genipin: a new alternative natural crosslinking agent for fixing heterograft tissue. THE KOREAN JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY 2011; 44:197-207. [PMID: 22263152 PMCID: PMC3249303 DOI: 10.5090/kjtcs.2011.44.3.197] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Revised: 03/18/2011] [Accepted: 05/10/2011] [Indexed: 11/16/2022]
Abstract
Background In cardiac surgery, especially in the reconstruction of vascular structures and intracardiac defects, glutaraldehyde has usually been used as the reagent for fixing porcine or bovine pericardial tissues. But the well-known problem of calcification or cytotoxicity of glutaraldehyde motivates the search for a replacement. The aim of this study is to investigate the physical, mechanical, and biochemical characteristics of bovine pericardial tissues fixed with genipin, which is known to be a less toxic and more natural fixing reagent. Materials and Methods Bovine pericardial tissues were fixed with different concentrations and conditions of glutaraldehyde and genipin. To determine the physical, mechanical, and biochemical differences among different concentrations and conditions, we divided the tissue into 18 groups by concentration, the addition of organic solvents, and the timing of adding the organic solvents, and compared the characteristics of each group. Results Tensile strength, physical activity, and thermal stability tests revealed that the tissues fixed with glutaraldehyde were better with regard to mechanical strength and biochemical durability. However, the difference was not significant statistically. Conclusion Genipin can be used as an alternative crosslinking agent for pericardial tissue, considering given its physical, mechanical, biochemical characteristics and low cytotoxicity comparable to glutaraldehyde. However, further studies are needed on the immune reaction and the long term changes in genipin-fixed tissues in the human body.
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Affiliation(s)
- Jae Suk Yoo
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Korea
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21
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Bottino MC, Thomas V, Jose MV, Dean DR, Janowski GM. Acellular dermal matrix graft: Synergistic effect of rehydration and natural crosslinking on mechanical properties. J Biomed Mater Res B Appl Biomater 2010; 95:276-82. [DOI: 10.1002/jbm.b.31711] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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