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McKee JA, Olsen EA, Wills Kpeli G, Brooks MR, Beitollahpoor M, Pesika NS, Burow ME, Mondrinos MJ. Engineering dense tumor constructs via cellular contraction of extracellular matrix hydrogels. Biotechnol Bioeng 2024; 121:380-394. [PMID: 37822194 DOI: 10.1002/bit.28561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 08/22/2023] [Accepted: 09/14/2023] [Indexed: 10/13/2023]
Abstract
Physical characteristics of solid tumors such as dense internal microarchitectures and pathological stiffness influence cancer progression and treatment. While it is routine to engineer culture substrates and scaffolds with elastic moduli that approximate tumors, these models often fail to capture characteristic internal microarchitectures such as densely compacted concentric ECM fibers at the stromal interface. Contractile mesenchymal cells can solve this engineering challenge by deforming, contracting, and compacting extracellular matrix (ECM) hydrogels to decrease tissue volume and increase tissue density. Here we demonstrate that allowing human fibroblasts of varying origins to freely contract collagen type I-containing hydrogels co-seeded with carcinoma cell spheroids produces a tissue engineered construct with structural features that mimic dense solid tumors in vivo. Morphometry and mechanical testing were conducted in tandem with biochemical analysis of proliferation and viability to confirm that dense carcinoma constructs engineered using this approach capture relevant physical characteristics of solid carcinomas in a tractable format that preserves viability and is amenable to extended culture. The reported method is adaptable to the use of multiple mesenchymal cell types and the inclusion of fibrin in the ECM combined with seeding of endothelial cells to produce prevascularized constructs. The physical dense carcinoma constructs engineered using this approach may provide more clinically relevant venues for studying cancer pathophysiology and the challenges associated with the delivery of macromolecular drugs and cellular immunotherapies to solid tumors.
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Affiliation(s)
- Jae A McKee
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
- Bioinnovation Program, Tulane University, New Orleans, Louisiana, USA
| | - Elisabet A Olsen
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
- Bioinnovation Program, Tulane University, New Orleans, Louisiana, USA
| | - Gideon Wills Kpeli
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Moriah R Brooks
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | | | - Noshir S Pesika
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Matthew E Burow
- Bioinnovation Program, Tulane University, New Orleans, Louisiana, USA
- Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana, USA
| | - Mark J Mondrinos
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
- Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana, USA
- Department of Physiology, Tulane University School of Medicine, New Orleans, Louisiana, USA
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2
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Park JYC, King A, Björk V, English BW, Fedintsev A, Ewald CY. Strategic outline of interventions targeting extracellular matrix for promoting healthy longevity. Am J Physiol Cell Physiol 2023; 325:C90-C128. [PMID: 37154490 DOI: 10.1152/ajpcell.00060.2023] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/28/2023] [Accepted: 04/28/2023] [Indexed: 05/10/2023]
Abstract
The extracellular matrix (ECM), composed of interlinked proteins outside of cells, is an important component of the human body that helps maintain tissue architecture and cellular homeostasis. As people age, the ECM undergoes changes that can lead to age-related morbidity and mortality. Despite its importance, ECM aging remains understudied in the field of geroscience. In this review, we discuss the core concepts of ECM integrity, outline the age-related challenges and subsequent pathologies and diseases, summarize diagnostic methods detecting a faulty ECM, and provide strategies targeting ECM homeostasis. To conceptualize this, we built a technology research tree to hierarchically visualize possible research sequences for studying ECM aging. This strategic framework will hopefully facilitate the development of future research on interventions to restore ECM integrity, which could potentially lead to the development of new drugs or therapeutic interventions promoting health during aging.
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Affiliation(s)
- Ji Young Cecilia Park
- Laboratory of Extracellular Matrix Regeneration, Institute of Translational Medicine, Department of Health Sciences and Technology, ETH Zürich, Schwerzenbach, Switzerland
| | - Aaron King
- Foresight Institute, San Francisco, California, United States
| | | | - Bradley W English
- Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States
| | | | - Collin Y Ewald
- Laboratory of Extracellular Matrix Regeneration, Institute of Translational Medicine, Department of Health Sciences and Technology, ETH Zürich, Schwerzenbach, Switzerland
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3
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Pirayesh A, De Decker I, Richters CD, Paauw NJ, Hoeksema H, Hoekstra MJ, Claes KE, Van Der Lei B, Monstrey S. Comparison of Glyaderm with different dermal substitute matrices in a porcine wound model. JPRAS Open 2022; 34:257-267. [DOI: 10.1016/j.jpra.2022.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 09/29/2022] [Indexed: 11/27/2022] Open
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4
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Cell mediated remodeling of stiffness matched collagen and fibrin scaffolds. Sci Rep 2022; 12:11736. [PMID: 35817812 PMCID: PMC9273755 DOI: 10.1038/s41598-022-14953-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 06/15/2022] [Indexed: 02/07/2023] Open
Abstract
Cells are known to continuously remodel their local extracellular matrix (ECM) and in a reciprocal way, they can also respond to mechanical and biochemical properties of their fibrous environment. In this study, we measured how stiffness around dermal fibroblasts (DFs) and human fibrosarcoma HT1080 cells differs with concentration of rat tail type 1 collagen (T1C) and type of ECM. Peri-cellular stiffness was probed in four directions using multi-axes optical tweezers active microrheology (AMR). First, we found that neither cell type significantly altered local stiffness landscape at different concentrations of T1C. Next, rat tail T1C, bovine skin T1C and fibrin cell-free hydrogels were polymerized at concentrations formulated to match median stiffness value. Each of these hydrogels exhibited distinct fiber architecture. Stiffness landscape and fibronectin secretion, but not nuclear/cytoplasmic YAP ratio differed with ECM type. Further, cell response to Y27632 or BB94 treatments, inhibiting cell contractility and activity of matrix metalloproteinases, respectively, was also dependent on ECM type. Given differential effect of tested ECMs on peri-cellular stiffness landscape, treatment effect and cell properties, this study underscores the need for peri-cellular and not bulk stiffness measurements in studies on cellular mechanotransduction.
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5
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Bio-engineering a prevascularized human tri-layered skin substitute containing a hypodermis. Acta Biomater 2021; 134:215-227. [PMID: 34303011 DOI: 10.1016/j.actbio.2021.07.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 12/17/2022]
Abstract
Severe injuries to skin including hypodermis require full-thickness skin replacement. Here, we bioengineered a tri-layered human skin substitute (TLSS) containing the epidermis, dermis, and hypodermis. The hypodermal layer was generated by differentiation of human adipose stem cells (ASC) in a collagen type I hydrogel and combined with a prevascularized dermis consisting of human dermal microvascular endothelial cells and fibroblasts, which arranged into a dense vascular network. Subsequently, keratinocytes were seeded on top to generate the epidermal layer of the TLSS. The differentiation of ASC into adipocytes was confirmed in vitro on the mRNA level by the presence of adiponectin, as well as by the expression of perilipin and FABP-4 proteins. Moreover, functional characteristics of the hypodermis in vitro and in vivo were evaluated by Oil Red O, BODIPY, and AdipoRed stainings visualizing intracellular lipid droplets. Further, we demonstrated that both undifferentiated ASC and mature adipocytes present in the hypodermis influenced the keratinocyte maturation and homeostasis in the skin substitutes after transplantation. In particular, an enhanced secretion of TGF-β1 by these cells affected the epidermal morphogenesis as assessed by the expression of key proteins involved in the epidermal differentiation including cytokeratin 1, 10, 19 and cornified envelope formation such as involucrin. Here, we propose a novel functional hypodermal-dermo-epidermal tri-layered skin substitute containing blood capillaries that efficiently promote regeneration of skin defects. STATEMENT OF SIGNIFICANCE: The main objective of this study was to develop and assess the usefulness of a tri-layered human prevascularized skin substitute (TLSS) containing an epidermis, dermis, and hypodermis. The bioengineered hypodermis was generated from human adipose mesenchymal stem cells (ASC) and combined with a prevascularized dermis and epidermis. The TLSS represents an exceptional model for studying the role of cell-cell and cell-matrix interactions in vitro and in vivo. In particular, we observed that enhanced secretion of TGF-β1 in the hypodermis exerted a profound impact on fibroblast and keratinocyte differentiation, as well as epidermal barrier formation and homeostasis. Therefore, improved understanding of the cell-cell interactions in such a physiological skin model is essential to gain insights into different aspects of wound healing.
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Bhuiyan S, Shen M, Chelvaretnam S, Tan AY, Ho G, Hossain MA, Widdop RE, Samuel CS. Assessment of renal fibrosis and anti-fibrotic agents using a novel diagnostic and stain-free second-harmonic generation platform. FASEB J 2021; 35:e21595. [PMID: 33908676 DOI: 10.1096/fj.202002053rrr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 03/28/2021] [Accepted: 03/31/2021] [Indexed: 01/16/2023]
Abstract
Current histological measurement techniques for interstitial collagen, the basis of interstitial fibrosis, are semi-quantitative at best and only provide a ratio of collagen levels within tissues. The Genesis200 imaging system and supplemental image analysis software, FibroIndex from HistoIndex, is a novel, automated platform that uses second-harmonic generation (SHG) for imaging and characterization of interstitial collagen deposition and additional characteristics, in the absence of any staining. However, its ability to quantify renal fibrosis requires investigation. This study compared SHG imaging of renal fibrosis in mice with unilateral ureteric obstruction (UUO), to that of Masson's trichrome staining (MTS) and immunohistochemistry (IHC) of collagen I. Additionally, the platform generated data on collagen morphology and distribution patterns. While all three methods determined that UUO-injured mice underwent significantly increased renal fibrosis after 7 days, the HistoIndex platform additionally determined that UUO-injured mice had a significantly increased collagen-to-tissue cross reticulation ratio (all P < .001 vs sham group). Furthermore, in UUO-injured mice treated with the relaxin family peptide receptor-1 agonists, relaxin (0.5 mg/kg/day) or B7-33 (0.25 mg/kg/day), or angiotensin converting enzyme-inhibitor, perindopril (1 mg/kg/day) over the 7-day period, only the HistoIndex platform determined that the drug-induced prevention of renal fibrosis correlated with significantly reduced collagen fiber thickness and collagen-to-tissue cross reticulation ratio, but increased collagen fiber counts. Relaxin or B7-33 treatment also increased renal matrix metalloproteinase-2 and reduced tissue inhibitor of metalloproteinase-1 levels (all P < .01 vs UUO alone). This study demonstrated the diagnostic value of the HistoIndex platform over currently used staining techniques.
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Affiliation(s)
- Sadman Bhuiyan
- Cardiovascular Disease Program, Monash Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Melbourne, VIC, Australia
| | - Matthew Shen
- Cardiovascular Disease Program, Monash Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Melbourne, VIC, Australia
| | - Sharenya Chelvaretnam
- Cardiovascular Disease Program, Monash Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Melbourne, VIC, Australia
| | - Andre Y Tan
- HistoIndex Pte Ltd, The LaunchPad, Fusionopolis, Singapore
| | - Gideon Ho
- HistoIndex Pte Ltd, The LaunchPad, Fusionopolis, Singapore
| | - Mohammed Akhter Hossain
- Florey Institute for Neuroscience and Mental Health, The University of Melbourne, Melbourne, VIC, Australia
| | - Robert E Widdop
- Cardiovascular Disease Program, Monash Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Melbourne, VIC, Australia
| | - Chrishan S Samuel
- Cardiovascular Disease Program, Monash Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Melbourne, VIC, Australia.,Department of Biochemistry and Molecular Biology, The University of Melbourne, Melbourne, VIC, Australia
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7
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Caballé-Serrano J, Zhang S, Sculean A, Staehli A, Bosshardt DD. Tissue Integration and Degradation of a Porous Collagen-Based Scaffold Used for Soft Tissue Augmentation. MATERIALS 2020; 13:ma13102420. [PMID: 32466244 PMCID: PMC7287763 DOI: 10.3390/ma13102420] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 04/30/2020] [Accepted: 05/18/2020] [Indexed: 12/23/2022]
Abstract
Collagen-based scaffolds hold great potential for tissue engineering, since they closely mimic the extracellular matrix. We investigated tissue integration of an engineered porous collagen-elastin scaffold developed for soft tissue augmentation. After implantation in maxillary submucosal pouches in 6 canines, cell invasion (vimentin), extracellular matrix deposition (collagen type I) and scaffold degradation (cathepsin k, tartrate-resistant acid phosphatase (TRAP), CD86) were (immuno)-histochemically evaluated. Invasion of vimentin+ cells (scattered and blood vessels) and collagen type I deposition within the pores started at 7 days. At 15 and 30 days, vimentin+ cells were still numerous and collagen type I increasingly filled the pores. Scaffold degradation was characterized by collagen loss mainly occurring around 15 days, a time point when medium-sized multinucleated cells peaked at the scaffold margin with simultaneous labeling for cathepsin k, TRAP, and CD86. Elastin was more resistant to degradation and persisted up to 90 days in form of packages well-integrated in the newly formed soft connective tissue. In conclusion, this collagen-based scaffold maintained long-enough volume stability to allow an influx of blood vessels and vimentin+ fibroblasts producing collagen type I, that filled the scaffold pores before major biomaterial degradation and collapse occurred. Cathepsin k, TRAP and CD86 appear to be involved in scaffold degradation.
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Affiliation(s)
- Jordi Caballé-Serrano
- Robert K. Schenk Laboratory of Oral Histology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland; (J.C.-S.); (S.Z.)
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland; (A.S.); (A.S.)
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Universitat Internacional de Catalunya, 08017 Barcelona, Spain
| | - Sophia Zhang
- Robert K. Schenk Laboratory of Oral Histology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland; (J.C.-S.); (S.Z.)
| | - Anton Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland; (A.S.); (A.S.)
| | - Alexandra Staehli
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland; (A.S.); (A.S.)
| | - Dieter D. Bosshardt
- Robert K. Schenk Laboratory of Oral Histology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland; (J.C.-S.); (S.Z.)
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland; (A.S.); (A.S.)
- Correspondence: ; Tel.: +41-316328605
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8
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Palano G, Jansson M, Backmark A, Martinsson S, Sabirsh A, Hultenby K, Åkerblad P, Granberg KL, Jennbacken K, Müllers E, Hansson EM. A high-content, in vitro cardiac fibrosis assay for high-throughput, phenotypic identification of compounds with anti-fibrotic activity. J Mol Cell Cardiol 2020; 142:105-117. [PMID: 32277974 DOI: 10.1016/j.yjmcc.2020.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/31/2020] [Accepted: 04/02/2020] [Indexed: 12/26/2022]
Abstract
A key feature in the pathogenesis of heart failure is cardiac fibrosis, but effective treatments that specifically target cardiac fibrosis are currently not available. A major impediment to progress has been the lack of reliable in vitro models with sufficient throughput to screen for activity against cardiac fibrosis. Here, we established cell culture conditions in micro-well format that support extracellular deposition of mature collagen from primary human cardiac fibroblasts - a hallmark of cardiac fibrosis. Based on robust biochemical characterization we developed a high-content phenotypic screening platform, that allows for high-throughput identification of compounds with activity against cardiac fibrosis. Our platform correctly identifies compounds acting on known cardiac fibrosis pathways. Moreover, it can detect anti-fibrotic activity for compounds acting on targets that have not previously been reported in in vitro cardiac fibrosis assays. Taken together, our experimental approach provides a powerful platform for high-throughput screening of anti-fibrotic compounds as well as discovery of novel targets to develop new therapeutic strategies for heart failure.
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Affiliation(s)
- G Palano
- Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre (KI/AZ ICMC), Department of Medicine, Karolinska Institutet, Huddinge, Sweden
| | - M Jansson
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - A Backmark
- Discovery Biology, Discovery Sciences, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - S Martinsson
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - A Sabirsh
- Advanced Drug Delivery, Pharmaceutical Sciences, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - K Hultenby
- Clincal Research Center, Department of Laboratory Medicine, Karolinska Institutet, Huddinge, Sweden
| | - P Åkerblad
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - K L Granberg
- Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - K Jennbacken
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - E Müllers
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden.
| | - E M Hansson
- Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre (KI/AZ ICMC), Department of Medicine, Karolinska Institutet, Huddinge, Sweden.
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Meuli M, Hartmann-Fritsch F, Hüging M, Marino D, Saglini M, Hynes S, Neuhaus K, Manuel E, Middelkoop E, Reichmann E, Schiestl C. A Cultured Autologous Dermo-epidermal Skin Substitute for Full-Thickness Skin Defects: A Phase I, Open, Prospective Clinical Trial in Children. Plast Reconstr Surg 2019; 144:188-198. [PMID: 31246829 DOI: 10.1097/prs.0000000000005746] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
BACKGROUND The management of deep partial-thickness and full-thickness skin defects remains a significant challenge. Particularly with massive defects, the current standard treatment, split-thickness skin grafting, is fraught with donor-site limitations and unsatisfactory long-term outcomes. A novel, autologous, bioengineered skin substitute was developed to address this problem. METHODS To determine whether this skin substitute could safely provide permanent defect coverage, a phase I clinical trial was performed at the University Children's Hospital Zurich. Ten pediatric patients with acute or elective deep partial- or full-thickness skin defects were included. Skin grafts of 49 cm were bioengineered using autologous keratinocytes and fibroblasts isolated from a patient's small skin biopsy specimen (4 cm), incorporated in a collagen hydrogel. RESULTS Graft take, epithelialization, infection, adverse events, skin quality, and histology were analyzed. Median graft take at 21 days postoperatively was 78 percent (range, 0 to 100 percent). Healed skin substitutes were stable and skin quality was nearly normal. There were four cases of hematoma leading to partial graft loss. Histology at 3 months revealed a well-stratified epidermis and a dermal compartment comparable to native skin. Mean follow-up duration was 15 months. CONCLUSIONS In the first clinical application of this novel skin substitute, safe coverage of skin defects was achieved. Safety and efficacy phase II trials comparing the novel skin substitute to split-thickness skin grafts are ongoing. CLINICAL QUESTION/LEVEL OF EVIDENCE Therapeutic, IV.
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Affiliation(s)
- Martin Meuli
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Fabienne Hartmann-Fritsch
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Martina Hüging
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Daniela Marino
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Monia Saglini
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Sally Hynes
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Kathrin Neuhaus
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Edith Manuel
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Esther Middelkoop
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Ernst Reichmann
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
| | - Clemens Schiestl
- From the Pediatric Burn Center, Plastic and Reconstructive Surgery, Children's Skin Center, the Tissue Biology Research Unit, Department of Surgery, and the Children's Research Center, University Children's Hospital Zurich; and the Department of Plastic, Reconstructive and Hand Surgery, VU University Medical Center, Amsterdam Movement Sciences
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10
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Matei AE, Chen CW, Kiesewetter L, Györfi AH, Li YN, Trinh-Minh T, Xu X, Tran Manh C, van Kuppevelt T, Hansmann J, Jüngel A, Schett G, Groeber-Becker F, Distler JHW. Vascularised human skin equivalents as a novel in vitro model of skin fibrosis and platform for testing of antifibrotic drugs. Ann Rheum Dis 2019; 78:1686-1692. [PMID: 31540936 DOI: 10.1136/annrheumdis-2019-216108] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/12/2019] [Accepted: 09/13/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVES Fibrosis is a complex pathophysiological process involving interplay between multiple cell types. Experimental modelling of fibrosis is essential for the understanding of its pathogenesis and for testing of putative antifibrotic drugs. However, most current models employ either phylogenetically distant species or rely on human cells cultured in an artificial environment. Here we evaluated the potential of vascularised in vitro human skin equivalents as a novel model of skin fibrosis and a platform for the evaluation of antifibrotic drugs. METHODS Skin equivalents were assembled on a three-dimensional extracellular matrix by sequential seeding of endothelial cells, fibroblasts and keratinocytes. Fibrotic transformation on exposure to transforming growth factor-β (TGFβ) and response to treatment with nintedanib as an established antifibrotic agent were evaluated by quantitative polymerase chain reaction (qPCR), capillary Western immunoassay, immunostaining and histology. RESULTS Skin equivalents perfused at a physiological pressure formed a mature, polarised epidermis, a stratified dermis and a functional vessel system. Exposure of these models to TGFβ recapitulated key features of SSc skin with activation of TGFβ pathways, fibroblast to myofibroblast transition, increased release of collagen and excessive deposition of extracellular matrix. Treatment with the antifibrotic agent nintedanib ameliorated this fibrotic transformation. CONCLUSION Our data provide evidence that vascularised skin equivalents can replicate key features of fibrotic skin and may serve as a platform for evaluation of antifibrotic drugs in a pathophysiologically relevant human setting.
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Affiliation(s)
- Alexandru-Emil Matei
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Chih-Wei Chen
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Lisa Kiesewetter
- Translational Center Würzburg, Fraunhofer Translational Center Regenerative Therapies, Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany
| | - Andrea-Hermina Györfi
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Yi-Nan Li
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Thuong Trinh-Minh
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Xiaohan Xu
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Cuong Tran Manh
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Toin van Kuppevelt
- Radboud Institute for Molecular Life Sciences, Department of Biochemistry, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jan Hansmann
- Translational Center Würzburg, Fraunhofer Translational Center Regenerative Therapies, Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany.,University for Applied Sciences Würzburg-Schweinfurt, Wurzburg, Germany
| | - Astrid Jüngel
- Center of Experimental Rheumatology, University Hospital Zurich/Zurich Center of Integrative Human Physiology (ZIHP), Zurich, Switzerland
| | - Georg Schett
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
| | - Florian Groeber-Becker
- Translational Center Würzburg, Fraunhofer Translational Center Regenerative Therapies, Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany.,Department for Tissue Engineering and Regenerative Medicine, Würzburg University Medical Center, Würzburg, Germany
| | - Jörg H W Distler
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and University Hospital Erlangen, Erlangen, Germany
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11
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Kistenev YV, Nikolaev VV, Kurochkina OS, Borisov AV, Vrazhnov DA, Sandykova EA. Application of multiphoton imaging and machine learning to lymphedema tissue analysis. BIOMEDICAL OPTICS EXPRESS 2019; 10:3353-3368. [PMID: 31467782 PMCID: PMC6706037 DOI: 10.1364/boe.10.003353] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/08/2019] [Accepted: 05/11/2019] [Indexed: 05/04/2023]
Abstract
The results of in-vivo two-photon imaging of lymphedema tissue are presented. The study involved 36 image samples from II stage lymphedema patients and 42 image samples from healthy volunteers. The papillary layer of the skin with a penetration depth of about 100 μm was examined. Both the collagen network disorganization and increase of the collagen/elastin ratio in lymphedema tissue, characterizing the severity of fibrosis, was observed. Various methods of image characterization, including edge detectors, a histogram of oriented gradients method, and a predictive model for diagnosis using machine learning, were used. The classification by "ensemble learning" provided 96% accuracy in validating the data from the testing set.
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Affiliation(s)
- Yury V. Kistenev
- Tomsk State University, 36 Lenin Ave., Tomsk, Russia, 6340502
- Siberian State Medical University, 2 Moscovsky Trakt, Tomsk, Russia, 634050
| | - Viktor V. Nikolaev
- Tomsk State University, 36 Lenin Ave., Tomsk, Russia, 6340502
- Institute of Strength Physics and Materials Science of Siberian Branch of the RAS, 2/4, pr. Akademicheskii, Tomsk, Russia, 634055
| | - Oksana S. Kurochkina
- The Institute of Microsurgery, Russia, 96 I. Chernykh St., Tomsk, Russia, 634063
| | - Alexey V. Borisov
- Tomsk State University, 36 Lenin Ave., Tomsk, Russia, 6340502
- Siberian State Medical University, 2 Moscovsky Trakt, Tomsk, Russia, 634050
| | - Denis A. Vrazhnov
- Tomsk State University, 36 Lenin Ave., Tomsk, Russia, 6340502
- Institute of Strength Physics and Materials Science of Siberian Branch of the RAS, 2/4, pr. Akademicheskii, Tomsk, Russia, 634055
| | - Ekaterina A. Sandykova
- Tomsk State University, 36 Lenin Ave., Tomsk, Russia, 6340502
- Institute of Strength Physics and Materials Science of Siberian Branch of the RAS, 2/4, pr. Akademicheskii, Tomsk, Russia, 634055
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12
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Kistenev YV, Vrazhnov DA, Nikolaev VV, Sandykova EA, Krivova NA. Analysis of Collagen Spatial Structure Using Multiphoton Microscopy and Machine Learning Methods. BIOCHEMISTRY (MOSCOW) 2019; 84:S108-S123. [PMID: 31213198 DOI: 10.1134/s0006297919140074] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Pathogenesis of many diseases is associated with changes in the collagen spatial structure. Traditionally, the 3D structure of collagen in biological tissues is analyzed using histochemistry, immunohistochemistry, magnetic resonance imaging, and X-radiography. At present, multiphoton microscopy (MPM) is commonly used to study the structure of biological tissues. MPM has a high spatial resolution comparable to histological analysis and can be used for direct visualization of collagen spatial structure. Because of a large volume of data accumulated due to the high spatial resolution of MPM, special analytical methods should be used for identification of informative features in the images and quantitative evaluation of relationship between these features and pathological processes resulting in the destruction of collagen structure. Here, we describe current approaches and achievements in the identification of informative features in the MPM images of collagen in biological tissues, as well as the development on this basis of algorithms for computer-aided classification of collagen structures using machine learning as a type of artificial intelligence methods.
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Affiliation(s)
- Yu V Kistenev
- Tomsk State University, Tomsk, 634050, Russia. .,Siberian State Medical University, Tomsk, 634050, Russia.,Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, Tomsk, 634055, Russia
| | - D A Vrazhnov
- Tomsk State University, Tomsk, 634050, Russia.,Siberian State Medical University, Tomsk, 634050, Russia
| | - V V Nikolaev
- Tomsk State University, Tomsk, 634050, Russia.,Siberian State Medical University, Tomsk, 634050, Russia
| | - E A Sandykova
- Tomsk State University, Tomsk, 634050, Russia.,Siberian State Medical University, Tomsk, 634050, Russia
| | - N A Krivova
- Tomsk State University, Tomsk, 634050, Russia
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13
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Neagu AN. Proteome Imaging: From Classic to Modern Mass Spectrometry-Based Molecular Histology. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1140:55-98. [PMID: 31347042 DOI: 10.1007/978-3-030-15950-4_4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In order to overcome the limitations of classic imaging in Histology during the actually era of multiomics, the multi-color "molecular microscope" by its emerging "molecular pictures" offers quantitative and spatial information about thousands of molecular profiles without labeling of potential targets. Healthy and diseased human tissues, as well as those of diverse invertebrate and vertebrate animal models, including genetically engineered species and cultured cells, can be easily analyzed by histology-directed MALDI imaging mass spectrometry. The aims of this review are to discuss a range of proteomic information emerging from MALDI mass spectrometry imaging comparative to classic histology, histochemistry and immunohistochemistry, with applications in biology and medicine, concerning the detection and distribution of structural proteins and biological active molecules, such as antimicrobial peptides and proteins, allergens, neurotransmitters and hormones, enzymes, growth factors, toxins and others. The molecular imaging is very well suited for discovery and validation of candidate protein biomarkers in neuroproteomics, oncoproteomics, aging and age-related diseases, parasitoproteomics, forensic, and ecotoxicology. Additionally, in situ proteome imaging may help to elucidate the physiological and pathological mechanisms involved in developmental biology, reproductive research, amyloidogenesis, tumorigenesis, wound healing, neural network regeneration, matrix mineralization, apoptosis and oxidative stress, pain tolerance, cell cycle and transformation under oncogenic stress, tumor heterogeneity, behavior and aggressiveness, drugs bioaccumulation and biotransformation, organism's reaction against environmental penetrating xenobiotics, immune signaling, assessment of integrity and functionality of tissue barriers, behavioral biology, and molecular origins of diseases. MALDI MSI is certainly a valuable tool for personalized medicine and "Eco-Evo-Devo" integrative biology in the current context of global environmental challenges.
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Affiliation(s)
- Anca-Narcisa Neagu
- Laboratory of Animal Histology, Faculty of Biology, "Alexandru Ioan Cuza" University of Iasi, Iasi, Romania.
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14
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Hinderer S, Sudrow K, Schneider M, Holeiter M, Layland SL, Seifert M, Schenke-Layland K. Surface functionalization of electrospun scaffolds using recombinant human decorin attracts circulating endothelial progenitor cells. Sci Rep 2018; 8:110. [PMID: 29311692 PMCID: PMC5758628 DOI: 10.1038/s41598-017-18382-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 12/11/2017] [Indexed: 01/25/2023] Open
Abstract
Decorin (DCN) is an important small leucine-rich proteoglycan present in the extracellular matrix (ECM) of many organs and tissues. Endothelial progenitor cells (EPCs) are able to interact with the surrounding ECM and bind to molecules such as DCN. Here, we recombinantly produced full-length human DCN under good laboratory practice (GLP) conditions, and after detailed immunological characterization, we investigated its potential to attract murine and human EPCs (mEPCs and hECFCs). Electrospun polymeric scaffolds were coated with DCN or stromal cell-derived factor-1 (SDF-1α) and were then dynamically cultured with both cell types. Cell viability was assessed via imaging flow cytometry. The number of captured cells was counted and compared with the non-coated controls. To characterize cell-scaffold interactions, immunofluorescence staining and scanning electron microscopy analyses were performed. We identified that DCN reduced T cell responses and attracted innate immune cells, which are responsible for ECM remodeling. A significantly higher number of EPCs attached on DCN- and SDF-1α-coated scaffolds, when compared with the uncoated controls. Interestingly, DCN showed a higher attractant effect on hECFCs than SDF-1α. Here, we successfully demonstrated DCN as promising EPC-attracting coating, which is particularily interesting when aiming to generate off-the-shelf biomaterials with the potential of in vivo cell seeding.
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Affiliation(s)
- Svenja Hinderer
- Department of Cell and Tissue Engineering, Fraunhofer-Institute for Interfacial Engineering and Biotechnology (IGB), 70569, Stuttgart, Germany
- Department of Women´s Health, Research Institute for Women's Health, Eberhard-Karls-University Tübingen, 72076, Tübingen, Germany
| | - Katrin Sudrow
- Institute of Medical Immunology and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353, Berlin, Germany
| | - Maria Schneider
- Institute of Medical Immunology and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353, Berlin, Germany
| | - Monika Holeiter
- Department of Women´s Health, Research Institute for Women's Health, Eberhard-Karls-University Tübingen, 72076, Tübingen, Germany
| | - Shannon Lee Layland
- Department of Cell and Tissue Engineering, Fraunhofer-Institute for Interfacial Engineering and Biotechnology (IGB), 70569, Stuttgart, Germany
- Department of Women´s Health, Research Institute for Women's Health, Eberhard-Karls-University Tübingen, 72076, Tübingen, Germany
| | - Martina Seifert
- Institute of Medical Immunology and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353, Berlin, Germany
| | - Katja Schenke-Layland
- Department of Cell and Tissue Engineering, Fraunhofer-Institute for Interfacial Engineering and Biotechnology (IGB), 70569, Stuttgart, Germany.
- Department of Women´s Health, Research Institute for Women's Health, Eberhard-Karls-University Tübingen, 72076, Tübingen, Germany.
- Department of Medicine/Cardiology, Cardiovascular Research Laboratories, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
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Bioreactor-induced mesenchymal progenitor cell differentiation and elastic fiber assembly in engineered vascular tissues. Acta Biomater 2017; 59:200-209. [PMID: 28690007 DOI: 10.1016/j.actbio.2017.07.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 06/28/2017] [Accepted: 07/05/2017] [Indexed: 12/17/2022]
Abstract
In vitro maturation of engineered vascular tissues (EVT) requires the appropriate incorporation of smooth muscle cells (SMC) and extracellular matrix (ECM) components similar to native arteries. To this end, the aim of the current study was to fabricate 4mm inner diameter vascular tissues using mesenchymal progenitor cells seeded into tubular scaffolds. A dual-pump bioreactor operating either in perfusion or pulsatile perfusion mode was used to generate physiological-like stimuli to promote progenitor cell differentiation, extracellular elastin production, and tissue maturation. Our data demonstrated that pulsatile forces and perfusion of 3D tubular constructs from both the lumenal and ablumenal sides with culture media significantly improved tissue assembly, effectively inducing mesenchymal progenitor cell differentiation to SMCs with contemporaneous elastin production. With bioreactor cultivation, progenitor cells differentiated toward smooth muscle lineage characterized by the expression of smooth muscle (SM)-specific markers smooth muscle alpha actin (SM-α-actin) and smooth muscle myosin heavy chain (SM-MHC). More importantly, pulsatile perfusion bioreactor cultivation enhanced the synthesis of tropoelastin and its extracellular cross-linking into elastic fiber compared with static culture controls. Taken together, the current study demonstrated progenitor cell differentiation and vascular tissue assembly, and provides insights into elastin synthesis and assembly to fibers. STATEMENT OF SIGNIFICANCE Incorporation of elastin into engineered vascular tissues represents a critical design goal for both mechanical and biological functions. In the present study, we seeded porous tubular scaffolds with multipotent mesenchymal progenitor cells and cultured in dual-pump pulsatile perfusion bioreactor. Physiological-like stimuli generated by bioreactor not only induced mesenchymal progenitor cell differentiation to vascular smooth muscle lineage but also actively promoted elastin synthesis and fiber assembly. Gene expression and protein synthesis analyses coupled with histological and immunofluorescence staining revealed that elastin-containing vascular tissues were fabricated. More importantly, co-localization and co-immunoprecipitation experiments demonstrated that elastin and fibrillin-1 were abundant throughout the cross-section of the tissue constructs suggesting a process of elastin protein crosslinking. This study paves a way forward to engineer elastin-containing functional vascular substitutes from multipotent progenitor cells in a bioreactor.
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16
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Hellings IR, Dolvik NI, Ekman S, Olstad K. Cartilage canals in the distal intermediate ridge of the tibia of fetuses and foals are surrounded by different types of collagen. J Anat 2017. [PMID: 28620929 PMCID: PMC5603784 DOI: 10.1111/joa.12650] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Some epiphyseal growth cartilage canals are surrounded by a ring of hypereosinophilic matrix consisting of collagen type I. Absence of the collagen type I ring may predispose canal vessels to failure and osteochondrosis, which can lead to fragments in joints (osteochondrosis dissecans). It is not known whether the ring develops in response to programming or biomechanical force. The distribution that may reveal the function of the ring has only been described in the distal femur of a limited number of foals. It is also not known which cells are responsible for producing the collagen ring. The aims of the current study were to examine fetuses and foals to infer whether the ring forms in response to biomechanical force or programming, to describe distribution and to investigate which cell type produces the ring. The material consisted of 46 fetuses and foals from 293 days of gestation to 142 days old, of both sexes and different breeds, divided into three groups, designated the naïve group up to and including the day of birth, the adapting group from 2 days up to and including 14 days old, and the loaded group from 15 days and older. The distal tibia was sawn into parasagittal slabs and the cranial half of the central slab from the intermediate ridge was examined by light microscopy and immunohistochemical staining for collagen type I. Presence, completeness and location of the collagen ring was compared, as was the quantity of perivascular mesenchymal cells. An eosinophilic ring present on HE-stained sections was seen in every single fetus and foal examined, which corresponded to collagen type I in immunostained sections. A higher proportion of cartilage canals were surrounded by an eosinophilic ring in the naïve and adapting groups at 73 and 76%, respectively, compared with the loaded group at 51%. When considering only patent canals, the proportion of canals with an eosinophilic ring was higher in the adapting and loaded than the naïve group of foals. The ring was present around 90 and 81% of patent canals in the deep and middle layers, respectively, compared with 58% in the superficial layer, and the ring was more often complete around deep compared with superficial canals. The ring was absent or partial around chondrifying canals. When an eosinophilic ring was present around patent canals, it was more common for the canal to contain one or more layers of perivascular mesenchymal cells rather than few to no layers. It was also more common for the collagen ring to be more complete around canals that contained many as opposed to few mesenchymal cells. In conclusion, the proportion of cartilage canals that had an eosinophilic ring was similar in all three groups of fetuses and foals, indicating that the presence of the collagen ring was mostly programmed, although some adaptation was evident. The ring was more often present around deep, compared with superficial canals, indicating a role in preparation for ossification. The collagen ring appeared to be produced by perivascular mesenchymal cells.
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Affiliation(s)
- Ingunn Risnes Hellings
- Faculty of Veterinary Medicine and Biosciences, Department of Companion Animal Clinical Sciences, Equine Section, Norwegian University of Life Sciences, Oslo, Norway
| | - Nils Ivar Dolvik
- Faculty of Veterinary Medicine and Biosciences, Department of Companion Animal Clinical Sciences, Equine Section, Norwegian University of Life Sciences, Oslo, Norway
| | - Stina Ekman
- Department of Biomedical Sciences and Veterinary Public Health, Section of Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Kristin Olstad
- Faculty of Veterinary Medicine and Biosciences, Department of Companion Animal Clinical Sciences, Equine Section, Norwegian University of Life Sciences, Oslo, Norway
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17
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Liskova J, Hadraba D, Filova E, Konarik M, Pirk J, Jelen K, Bacakova L. Valve interstitial cell culture: Production of mature type I collagen and precise detection. Microsc Res Tech 2017; 80:936-942. [PMID: 28455837 DOI: 10.1002/jemt.22886] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 03/30/2017] [Accepted: 04/16/2017] [Indexed: 12/22/2022]
Abstract
Collagen often acts as an extracellular and intracellular marker for in vitro experiments, and its quality defines tissue constructs. To validate collagen detection techniques, cardiac valve interstitial cells were isolated from pigs and cultured under two different conditions; with and without ascorbic acid. The culture with ascorbic acid reached higher cell growth and collagen deposition, although the expression levels of collagen gene stayed similar to the culture without ascorbic acid. The fluorescent microscopy was positive for collagen fibers in both the cultures. Visualization of only extracellular collagen returned a higher correlation coefficient when comparing the immunolabeling and second harmonic generation microscopy images in the culture with ascorbic acid. Lastly, it was proved that the hydroxyproline strongly contributes to the second-order susceptibility tensor of collagen molecules, and therefore the second harmonic generation signal is impaired in the culture without ascorbic acid.
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Affiliation(s)
- Jana Liskova
- Institute of Physiology, the Czech Academy of Sciences, Prague, 142 20, Czech Republic
| | - Daniel Hadraba
- Institute of Physiology, the Czech Academy of Sciences, Prague, 142 20, Czech Republic.,Faculty of Physical Education and Sport, Charles University, Prague, 162 00, Czech Republic.,Department of Biophysics, Hasselt University, Diepenbeek, B-3590, Belgium
| | - Elena Filova
- Institute of Physiology, the Czech Academy of Sciences, Prague, 142 20, Czech Republic
| | - Miroslav Konarik
- Institute for Clinical and Experimental Medicine, Prague, 140 21, Czech Republic
| | - Jan Pirk
- Institute for Clinical and Experimental Medicine, Prague, 140 21, Czech Republic
| | - Karel Jelen
- Faculty of Physical Education and Sport, Charles University, Prague, 162 00, Czech Republic
| | - Lucie Bacakova
- Institute of Physiology, the Czech Academy of Sciences, Prague, 142 20, Czech Republic
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