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Peake M, Dunnill C, Ibraheem K, Smith A, Clarke DJ, Georgopoulos NT. A novel method for the establishment of autologous skin cell suspensions: characterisation of cellular sub-populations, epidermal stem cell content and wound response-enhancing biological properties. Front Bioeng Biotechnol 2024; 12:1386896. [PMID: 38646012 PMCID: PMC11026634 DOI: 10.3389/fbioe.2024.1386896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 03/25/2024] [Indexed: 04/23/2024] Open
Abstract
Introduction: Autologous cell suspension (ACS)-based therapy represents a highly promising approach for burns and chronic wounds. However, existing technologies have not achieved the desired clinical success due to several limitations. To overcome practical and cost-associated obstacles of existing ACS methods, we have established a novel methodology for rapid, enzymatic disaggregation of human skin cells and their isolation using a procedure that requires no specialist laboratory instrumentation and is performed at room temperature. Methods: Cells were isolated using enzymatic disaggregation of split-thickness human skin followed by several filtration steps for isolation of cell populations, and cell viability was determined. Individual population recovery was confirmed in appropriate culture medium types, and the presence of epidermal stem cells (EpSCs) within keratinocyte sub-populations was defined by flow cytometry via detection of CD49 and CD71. Positive mediators of wound healing secreted by ACS-derived cultures established on a collagen-based wound-bed mimic were detected by proteome arrays and quantified by ELISA, and the role of such mediators was determined by cell proliferation assays. The effect of ACS-derived conditioned-medium on myofibroblasts was investigated using an in-vitro model of myofibroblast differentiation via detection of α-SMA using immunoblotting and immunofluorescence microscopy. Results: Our methodology permitted efficient recovery of keratinocytes, fibroblasts and melanocytes, which remained viable upon long-term culture. ACS-derivatives comprised sub-populations with the CD49-high/CD71-low expression profile known to demarcate EpSCs. Via secretion of mitogenic factors and wound healing-enhancing mediators, the ACS secretome accelerated keratinocyte proliferation and markedly curtailed cytodifferentiation of myofibroblasts, the latter being key mediators of fibrosis and scarring. Discussion: The systematic characterisation of the cell types within our ACS isolates provided evidence for their superior cell viability and the presence of EpSCs that are critical drivers of wound healing. We defined the biological properties of ACS-derived keratinocytes, which include ability to secrete positive mediators of wound healing as well as suppression of myofibroblast cytodifferentiation. Thus, our study provides several lines of evidence that the established ACS isolates comprise highly-viable cell populations which can physically support wound healing and possess biological properties that have the potential to enhance not only the speed but also the quality of wound healing.
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Affiliation(s)
- Michael Peake
- School of Applied Sciences, University of Huddersfield, Huddersfield, United Kingdom
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, NIHR Manchester Biomedical Research Centre, Manchester, United Kingdom
| | - Chris Dunnill
- School of Applied Sciences, University of Huddersfield, Huddersfield, United Kingdom
| | - Khalidah Ibraheem
- School of Applied Sciences, University of Huddersfield, Huddersfield, United Kingdom
| | - Adrian Smith
- Department of General Surgery, Calderdale and Huddersfield NHS Foundation Trust, Huddersfield, United Kingdom
| | - Douglas J. Clarke
- School of Applied Sciences, University of Huddersfield, Huddersfield, United Kingdom
| | - Nikolaos T. Georgopoulos
- School of Applied Sciences, University of Huddersfield, Huddersfield, United Kingdom
- Biomolecular Sciences Research Centre, Industry and Innovation Research Institute, Sheffield Hallam University, Sheffield, United Kingdom
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2
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Hu P, Armato U, Freddi G, Chiarini A, Dal Prà I. Human Keratinocytes and Fibroblasts Co-Cultured on Silk Fibroin Scaffolds Exosomally Overrelease Angiogenic and Growth Factors. Cells 2023; 12:1827. [PMID: 37508492 PMCID: PMC10378127 DOI: 10.3390/cells12141827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 06/30/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
Objectives: The optimal healing of skin wounds, deep burns, and chronic ulcers is an important clinical problem. Attempts to solve it have been driving the search for skin equivalents based on synthetic or natural polymers. Methods: Consistent with this endeavor, we used regenerated silk fibroin (SF) from Bombyx mori to produce a novel compound scaffold by welding a 3D carded/hydroentangled SF-microfiber-based nonwoven layer (C/H-3D-SFnw; to support dermis engineering) to an electrospun 2D SF nanofiber layer (ESFN; a basal lamina surrogate). Next, we assessed-via scanning electron microscopy, attenuated total reflectance Fourier transform infrared spectroscopy, differential scanning calorimetry, mono- and co-cultures of HaCaT keratinocytes and adult human dermal fibroblasts (HDFs), dsDNA assays, exosome isolation, double-antibody arrays, and angiogenesis assays-whether the C/H-3D-SFnws/ESFNs would allow the reconstitution of a functional human skin analog in vitro. Results: Physical analyses proved that the C/H-3D-SFnws/ESFNs met the requirements for human soft-tissue-like implants. dsDNA assays revealed that co-cultures of HaCaTs (on the 2D ESFN surface) and HDFs (inside the 3D C/H-3D-SFnws) grew more intensely than did the respective monocultures. Double-antibody arrays showed that the CD9+/CD81+ exosomes isolated from the 14-day pooled growth media of HDF and/or HaCaT mono- or co-cultures conveyed 35 distinct angiogenic/growth factors (AGFs). However, versus monocultures' exosomes, HaCaT/HDF co-cultures' exosomes (i) transported larger amounts of 15 AGFs, i.e., PIGF, ANGPT-1, bFGF, Tie-2, Angiogenin, VEGF-A, VEGF-D, TIMP-1/-2, GRO-α/-β/-γ, IL-1β, IL-6, IL-8, MMP-9, and MCP-1, and (ii) significantly more strongly stimulated human dermal microvascular endothelial cells to migrate and assemble tubes/nodes in vitro. Conclusions: Our results showed that both cell-cell and cell-SF interactions boosted the exosomal release of AGFs from HaCaTs/HDFs co-cultured on C/H-3D-SFnws/ESFNs. Hence, such exosomes are an asset for prospective clinical applications as they advance cell growth and neoangiogenesis and consequently graft take and skin healing. Moreover, this new integument analog could be instrumental in preclinical and translational studies on human skin pathophysiology and regeneration.
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Affiliation(s)
- Peng Hu
- Department of Surgery, Dentistry, Pediatrics & Gynecology, University of Verona Medical School, 37134 Verona, Italy
| | - Ubaldo Armato
- Department of Surgery, Dentistry, Pediatrics & Gynecology, University of Verona Medical School, 37134 Verona, Italy
| | | | - Anna Chiarini
- Department of Surgery, Dentistry, Pediatrics & Gynecology, University of Verona Medical School, 37134 Verona, Italy
| | - Ilaria Dal Prà
- Department of Surgery, Dentistry, Pediatrics & Gynecology, University of Verona Medical School, 37134 Verona, Italy
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3
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Hofmann E, Fink J, Pignet AL, Schwarz A, Schellnegger M, Nischwitz SP, Holzer-Geissler JCJ, Kamolz LP, Kotzbeck P. Human In Vitro Skin Models for Wound Healing and Wound Healing Disorders. Biomedicines 2023; 11:biomedicines11041056. [PMID: 37189674 DOI: 10.3390/biomedicines11041056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 05/17/2023] Open
Abstract
Skin wound healing is essential to health and survival. Consequently, high amounts of research effort have been put into investigating the cellular and molecular components involved in the wound healing process. The use of animal experiments has contributed greatly to the knowledge of wound healing, skin diseases, and the exploration of treatment options. However, in addition to ethical concerns, anatomical and physiological inter-species differences often influence the translatability of animal-based studies. Human in vitro skin models, which include essential cellular and structural components for wound healing analyses, would improve the translatability of results and reduce animal experiments during the preclinical evaluation of novel therapy approaches. In this review, we summarize in vitro approaches, which are used to study wound healing as well as wound healing-pathologies such as chronic wounds, keloids, and hypertrophic scars in a human setting.
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Affiliation(s)
- Elisabeth Hofmann
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Julia Fink
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Anna-Lisa Pignet
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Anna Schwarz
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Marlies Schellnegger
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Sebastian P Nischwitz
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Judith C J Holzer-Geissler
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Lars-Peter Kamolz
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Petra Kotzbeck
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
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Othman EM, Hamada HA, Mohamed GI, Abdallah GA, Ahmed ZS, Al-Shenqiti AM, Kadry AM. Clinical and histopathological responses to bee venom phonophoresis in treating venous and diabetic ulcers: a single-blind randomized controlled trial. Front Med (Lausanne) 2023; 10:1085544. [PMID: 37153087 PMCID: PMC10157245 DOI: 10.3389/fmed.2023.1085544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/21/2023] [Indexed: 05/09/2023] Open
Abstract
Introduction Chronic venous and diabetic ulcers are hard to treat that cause patients long time of suffering as well as significant healthcare and financial costs. Purpose The conducted study was to evaluate the efficacy of bee venom (BV) phonophoresis on the healing of chronic unhealed venous and/or diabetic foot ulcers Also, to compare the healing rate of diabetic and venous ulcers. Methodology The study included 100 patients (71 males and 29 females) with an age range of 40-60 years' old who had chronic unhealed venous leg ulcers of grade I, grade II, or diabetic foot ulcers with type II diabetes mellitus. They randomly assigned into four equal groups of 25: Group A (diabetic foot ulcer study group) and group C (venous ulcer study group) who both received conservative treatment of medical ulcer care and phonophoresis with BV gel, in addition to group B (diabetic foot ulcer control group) and group D (venous ulcer control group) who both received conservative treatment of medical ulcer care and received ultrasound sessions only without BV gel. Wound surface area (WSA) and ulcer volume measurement (UVM) were used to assess the ulcer healing pre-application (P0), post-6 weeks of treatment (P1), and after 12 weeks of treatment (P2). In addition to Ki-67 immunohistochemistry was used to evaluate the cell proliferative in the granulation tissue of ulcers pre-application (P0) and after 12 weeks of treatment (P2) for all groups. Results This research revealed a statistical significance improvement (p ≤ 0.0) in the WSA, and UVM with no significant difference between study groups after treatment. Regarding Ki-67 immunohistochemistry showed higher post treatment values in the venous ulcer group in comparison to the diabetic foot ulcer group. Conclusion Bee venom (BV) provided by phonophoresis is effective adjuvant treatment in accelerating venous and diabetic foot ulcer healing with higher proliferative effect on venous ulcer. Clinical trial registration www.ClinicalTrials.gov, identifier: NCT05285930.
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Affiliation(s)
- Eman M. Othman
- Department for Surgery, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
| | - Hamada Ahmed Hamada
- Department for Biomechanics, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
| | - Ghada I. Mohamed
- Department of Basic Science, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
| | - Ghada A. Abdallah
- Department of Basic Science, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
| | - Zeinab S. Ahmed
- Department of Cardiovascular, Respiratory Disorder and Geriatrics, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
| | | | - Ahmed Mahmoud Kadry
- Faculty of Physical Therapy, Kafrelsheikh University, Kafr el-Sheikh, Egypt
- *Correspondence: Ahmed Mahmoud Kadry
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5
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Immune System Acts on Orthodontic Tooth Movement: Cellular and Molecular Mechanisms. BIOMED RESEARCH INTERNATIONAL 2022; 2022:9668610. [PMID: 36330460 PMCID: PMC9626206 DOI: 10.1155/2022/9668610] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/05/2022] [Accepted: 09/29/2022] [Indexed: 12/03/2022]
Abstract
Orthodontic tooth movement (OTM) is a tissue remodeling process based on orthodontic force loading. Compressed periodontal tissues have a complicated aseptic inflammatory cascade, which are considered the initial factor of alveolar bone remodeling. Since skeletal and immune systems shared a wide variety of molecules, osteoimmunology has been generally accepted as an interdisciplinary field to investigate their interactions. Unsurprisingly, OTM is considered a good mirror of osteoimmunology since it involves immune reaction and bone remolding. In fact, besides bone remodeling, OTM involves cementum resorption, soft tissue remodeling, orthodontic pain, and relapse, all correlated with immune cells and/or immunologically active substance. The aim of this paper is to review the interaction of immune system with orthodontic tooth movement, which helps gain insights into mechanisms of OTM and search novel method to short treatment period and control complications.
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6
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Contribution of autofluorescence from intracellular proteins in multiphoton fluorescence lifetime imaging. Sci Rep 2022; 12:16584. [PMID: 36198710 PMCID: PMC9534927 DOI: 10.1038/s41598-022-20857-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 09/20/2022] [Indexed: 11/08/2022] Open
Abstract
Multiphoton fluorescence lifetime imaging microscopy (MPM-FLIM) is extensively proposed as a non-invasive optical method to study tissue metabolism. The approach is based on recording changes in the fluorescence lifetime attributed to metabolic co-enzymes, of which nicotinamide adenine dinucleotide (NADH) is of major importance. However, intrinsic tissue fluorescence is complex. Particularly when utilizing two-photon excitation, as conventionally employed in MPM. This increases the possibility for spectral crosstalk and incorrect assignment of the origin of the FLIM signal. Here we demonstrate that in keratinocytes, proteins such as keratin may interfere with the signal usually assigned to NADH in MPM-FLIM by contributing to the lifetime component at 1.5 ns. This is supported by a change in fluorescence lifetime distribution in KRT5- and KRT14-silenced cells. Altogether, our results suggest that the MPM-FLIM data originating from cellular autofluorescence is far more complex than previously suggested and that the contribution from other tissue constituents should not be neglected-changing the paradigm for data interpretation in this context.
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7
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Modulation of Inflammatory Responses by a Non-Invasive Physical Plasma Jet during Gingival Wound Healing. Cells 2022; 11:cells11172740. [PMID: 36078148 PMCID: PMC9454534 DOI: 10.3390/cells11172740] [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: 07/16/2022] [Revised: 08/22/2022] [Accepted: 08/29/2022] [Indexed: 11/17/2022] Open
Abstract
Gingival wound healing plays an important role in the treatment of a variety of inflammatory diseases. In some cases, however, wound healing is delayed by various endogenous or exogenous factors. In recent years, non-invasive physical plasma (NIPP), a highly reactive gas, has become the focus of research, because of its anti-inflammatory and wound healing-promoting efficacy. So far, since NIPP application has been poorly elucidated in dentistry, the aim of this study was to further investigate the effect of NIPP on various molecules associated with inflammation and wound healing in gingival cells. Human gingival fibroblasts (HGF) and human gingival keratinocytes (HGK) were treated with NIPP at different application times. Cell viability and cell morphology were assessed using DAPI/phalloidin staining. Cyclooxygenase (COX)2; tumour necrosis factor (TNF); CC Motif Chemokine Ligand (CCL)2; and interleukin (IL)1B, IL6 and IL8 were analysed at the mRNA and protein level by a real-time PCR and ELISA. NIPP did not cause any damage to the cells. Furthermore, NIPP led to a downregulation of proinflammatory molecules. Our study shows that NIPP application does not damage the gingival tissue and that the promotion of wound healing is also due to an anti-inflammatory component.
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8
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Ganier C, Rognoni E, Goss G, Lynch M, Watt FM. Fibroblast Heterogeneity in Healthy and Wounded Skin. Cold Spring Harb Perspect Biol 2022; 14:a041238. [PMID: 35667795 PMCID: PMC9248828 DOI: 10.1101/cshperspect.a041238] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Fibroblasts are the main cell type in the dermis. They are responsible for the synthesis and deposition of structural proteins such as collagen and elastin, which are integrated into the extracellular matrix (ECM). Mouse and human studies using flow cytometry, cell culture, skin reconstitution, and lineage tracing experiments have shown the existence of different subpopulations of fibroblasts, including papillary fibroblasts, reticular fibroblasts, and fibroblasts comprising the dermal papilla at the base of the hair follicle. In recent years, the technological advances in single-cell sequencing have allowed researchers to study the repertoire of cells present in full-thickness skin including the dermis. Multiple groups have confirmed that distinct fibroblast populations can be identified in mouse and human dermis on the basis of differences in the transcriptional profile. Here, we discuss the current state of knowledge regarding dermal fibroblast heterogeneity in healthy mouse and human skin, highlighting the similarities and differences between mouse and human fibroblast subpopulations. We also discuss how fibroblast heterogeneity may provide insights into physiological wound healing and its dysfunction in pathological states such as hypertrophic and keloid scars.
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Affiliation(s)
- Clarisse Ganier
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, London SE1 9RT, United Kingdom
| | - Emanuel Rognoni
- Centre for Endocrinology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Georgina Goss
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, London SE1 9RT, United Kingdom
| | - Magnus Lynch
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, London SE1 9RT, United Kingdom
- St John's Institute of Dermatology, King's College London, London SE1 9RT, United Kingdom
| | - Fiona M Watt
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, London SE1 9RT, United Kingdom
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9
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Das R, Virlan MJR, Xenaki V, Kulasekara KK, Lukandu O, Neppelberg E, Vintermyr OK, Johannessen AC, Calenic B, Costea DE. Granulocyte macrophage-colony stimulating factor and keratinocyte growth factor control of early stages of differentiation of oral epithelium. Eur J Oral Sci 2022; 130:e12867. [PMID: 35452148 PMCID: PMC9322408 DOI: 10.1111/eos.12867] [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: 11/11/2021] [Accepted: 03/24/2022] [Indexed: 11/29/2022]
Abstract
Oral epithelial differentiation is known to be directed by underlying fibroblasts, but the responsible factor(s) have not been identified. We aimed here to identify fibroblast‐derived factors responsible for oral epithelial differentiation. Primary normal human oral keratinocytes and fibroblasts were isolated from healthy volunteers after informed consent (n = 5) and 3D‐organotypic (3D‐OT) cultures were constructed. Various growth factors were added at a range of 0.1‐100 ng/ml. 3D‐OTs were harvested after ten days and assessed histologically, by immunohistochemistry and the TUNEL method. Epithelium developed in 3D‐OT without fibroblasts showed an undifferentiated phenotype. Addition of granulocyte macrophage‐colony stimulating factor (GM‐CSF) induced expression of cytokeratin 13 in suprabasal cell layers. Admixture of GM‐CSF and keratinocyte growth factor (KGF) induced, in addition, polarization of epidermal growth factor (EGF) receptor and β1‐integrin to basal cell layer and collagen IV deposition. Terminal differentiation with polarization of TUNEL‐positive cells to superficial layers occurred only in the presence of fibroblasts in collagen gels either in direct contact or at distance from normal oral keratinocytes. Taken together, these results show that major aspects of oral epithelial differentiation are regulated by the synergic combination of GM‐CSF and KGF. However, the terminal stage seems to be controlled by other yet unidentified fibroblast‐derived diffusible factor(s).
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Affiliation(s)
- Ridhima Das
- Center for Cancer Biomarkers CCBIO and Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Maria Justina Roxana Virlan
- Center for Cancer Biomarkers CCBIO and Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine, University of Bergen, Bergen, Norway.,Department of Oral Rehabilitation and Department of Biochemistry, 'Carol Davila' University of Medicine and Pharmacy, Bucharest, Romania
| | - Victoria Xenaki
- Center for Cancer Biomarkers CCBIO and Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine, University of Bergen, Bergen, Norway.,Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Keerthi K Kulasekara
- Department of Pharmacy & Applied Science, College of Science, Health & Engineering, La Trobe University, Bendigo, Victoria, Australia
| | - Ochiba Lukandu
- Maxillofacial Surgery and Pathology, School of Dentistry, Moi University, Eldoret, Kenya
| | - Evelyn Neppelberg
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway.,Department of Oral and Maxillofacial Surgery, Head and Neck Clinic, Haukeland University Hospital, Bergen, Norway
| | - Olav K Vintermyr
- Center for Cancer Biomarkers CCBIO and Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine, University of Bergen, Bergen, Norway.,Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Anne Chr Johannessen
- Center for Cancer Biomarkers CCBIO and Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine, University of Bergen, Bergen, Norway.,Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Bogdan Calenic
- Department of Oral Rehabilitation and Department of Biochemistry, 'Carol Davila' University of Medicine and Pharmacy, Bucharest, Romania
| | - Daniela Elena Costea
- Center for Cancer Biomarkers CCBIO and Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine, University of Bergen, Bergen, Norway.,Department of Pathology, Haukeland University Hospital, Bergen, Norway
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10
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Yeganeh PM, Tahmasebi S, Esmaeilzadeh A. Cellular and biological factors involved in healing wounds and burns and treatment options in tissue engineering. Regen Med 2022; 17:401-418. [PMID: 35545963 DOI: 10.2217/rme-2022-0029] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Severe traumatic wounds and burns have a high chance of mortality and can leave survivors with many functional disabilities and cosmetic problems, including scars. The healing process requires a harmonious interplay of various cells and growth factors. Different structures of the skin house numerous cells, matrix components and growth factors. Any disturbance in the balance between these components can impair the healing process. The function of cells and growth factors can be manipulated and facilitated to aid tissue repair. In the current review, the authors focus on the importance of the skin microenvironment, the pathophysiology of various types of burns, mechanisms and factors involved in skin repair and wound healing and regeneration of the skin using tissue engineering approaches.
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Affiliation(s)
| | - Safa Tahmasebi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abdolreza Esmaeilzadeh
- Department of immunology, School of Medicine, Zanjan University of Medical Science, Zanjan, 4513956111, Iran.,Cancer Gene Therapy Research Center, Zanjan University of Medical Science, Zanjan, Iran
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11
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Tham M, Stark HJ, Jauch A, Harwood C, Pavez Lorie E, Boukamp P. Adverse Effects of Vemurafenib on Skin Integrity: Hyperkeratosis and Skin Cancer Initiation Due to Altered MEK/ERK-Signaling and MMP Activity. Front Oncol 2022; 12:827985. [PMID: 35174094 PMCID: PMC8842679 DOI: 10.3389/fonc.2022.827985] [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: 12/02/2021] [Accepted: 01/03/2022] [Indexed: 11/24/2022] Open
Abstract
The BRAF inhibitor vemurafenib, approved for treating patients with BRAF V600E-mutant and unresectable or metastatic melanomas, rapidly induces cutaneous adverse events, including hyperkeratotic skin lesions and cutaneous squamous cell carcinomas (cSCC). To determine, how vemurafenib would provoke these adverse events, we utilized long-term in vitro skin equivalents (SEs) comprising epidermal keratinocytes and dermal fibroblasts in their physiological environment. We inserted keratinocytes with different genetic background [normal keratinocytes: NHEK, HaCaT (p53/mut), and HrasA5 (p53/mut+Hras/mut)] to analyze effects depending on the stage of carcinogenesis. We now show that vemurafenib activates MEK-ERK signaling in both, keratinocytes, and fibroblasts in vitro and in the in vivo-like SEs. As a consequence, vemurafenib does not provide a growth advantage but leads to a differentiation phenotype, causing accelerated differentiation and hyperkeratosis in the NHEK and normalized stratification and cornification in the transformed keratinocytes. Although all keratinocytes responded very similarly to vemurafenib in their expression profile, particularly with a significant induction of MMP1 and MMP3, only the HrasA5 cells revealed a vemurafenib-dependent pathophysiological shift to tumor progression, i.e., the initiation of invasive growth. This was shown by increased proteolytic activity allowing for penetration of the basement membrane and invasion into the disrupted underlying matrix. Blocking MMP activity, by the addition of ilomastat, prevented invasion with all corresponding degradative activities, thus substantiating that the RAS-RAF-MEK-ERK/MMP axis is the most important molecular basis for the rapid switch towards tumorigenic conversion of the HrasA5 keratinocytes upon vemurafenib treatment. Finally, cotreatment with vemurafenib and the MEK inhibitor cobimetinib prevented MEK-ERK hyperactivation and with that abolished both, the epidermal differentiation and the tumor invasion phenotype. This suggests that both cutaneous adverse events are under direct control of vemurafenib-dependent MEK-ERK hyperactivation and confirms the dependence on preexisting genetic alterations of the skin keratinocytes that determine the basis towards induction of tumorigenic progression.
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Affiliation(s)
- Marius Tham
- Department of Genetics of Skin Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Hans-Jürgen Stark
- Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg, Heidelberg, Germany
| | - Anna Jauch
- Institute of Human Genetics, University Heidelberg, Heidelberg, Germany
| | - Catherine Harwood
- Department of Dermatology, Royal London Hospital, Barts Health NHS Trust, London, United Kingdom.,Centre for Cell Biology and Cutaneous Research, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | | | - Petra Boukamp
- Department of Genetics of Skin Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg, Germany.,IUF-Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
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12
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Kim K, Kim H, Sung GY. An Interleukin-4 and Interleukin-13 Induced Atopic Dermatitis Human Skin Equivalent Model by a Skin-On-A-Chip. Int J Mol Sci 2022; 23:ijms23042116. [PMID: 35216228 PMCID: PMC8878506 DOI: 10.3390/ijms23042116] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 01/30/2022] [Accepted: 02/08/2022] [Indexed: 12/27/2022] Open
Abstract
Currently, the mechanism of progression of atopic dermatitis (AD) is not well understood because there is no physiologically appropriate disease model in terms of disease complexity and multifactoriality. Type 2 inflammation, mediated by interleukin (IL)-4 and IL-13, plays an important role in AD. In this study, full-thickness human skin equivalents consisting of human-derived cells were fabricated from pumpless microfluidic chips and stimulated with IL-4 and IL-13. The morphological properties, gene expression, cytokine secretion and protein expression of the stimulated human skin equivalent (HSE) epidermis were investigated. The results showed epidermal and spongy formations similar to those observed in lesions in AD, and decreased expression of barrier-related filaggrin, loricrin and involucrin genes and proteins induced by IL-4Rα signaling. In addition, we induced the expression of carbonic anhydrase II (CAII), a gene specifically expressed in the epidermis of patients with AD. Thus, AD human skin equivalents can be used to mimic the key pathological features of atopic dermatitis, overcoming the limitations of existing studies that rely solely on mouse models and have been unable to translate their effects to humans. Our results will be useful for future research on the development of therapeutic agents for atopic dermatitis.
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Affiliation(s)
- Kyunghee Kim
- Interdisciplinary Program of Nano-Medical Device Engineering, Hallym University, Chuncheon 24252, Korea;
- Major in Materials Science and Engineering, Hallym University, Chuncheon 24252, Korea;
| | - Hyeju Kim
- Major in Materials Science and Engineering, Hallym University, Chuncheon 24252, Korea;
| | - Gun Yong Sung
- Interdisciplinary Program of Nano-Medical Device Engineering, Hallym University, Chuncheon 24252, Korea;
- Major in Materials Science and Engineering, Hallym University, Chuncheon 24252, Korea;
- Integrative Materials Research Institute, Hallym University, Chuncheon 24252, Korea
- Correspondence:
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13
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Murakami M, Akagi T, Sasano Y, Akashi M. Effect of 3D-Fibroblast Dermis Constructed by Layer-by-Layer Cell Coating Technique on Tight Junction Formation and Function in Full-Thickness Skin Equivalent. ACS Biomater Sci Eng 2021; 7:3835-3844. [PMID: 34286576 DOI: 10.1021/acsbiomaterials.1c00375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Human skin equivalents (HSEs) consisting of an epidermis and dermis have been used as promising tools for drug evaluation and for clinical applications in regenerative medicine. Normal human dermal fibroblasts (NHDFs) are essential for the fabrication of HSEs because they play an important role in the maturation of the epidermis. Recently, epidermal tight junctions (TJs), which are complex cell-cell junctions, have attracted much attention as a second barrier and regulator for other barrier functions. In a previous study, we revealed the expression of TJ-related proteins and the time course of formation of TJ structure in the HSE (layer-by-layer (LbL)-three-dimensional (3D) Skin) constructed by layer-by-layer (LbL) cell coating technique that have a unique dermis consisting of NHDFs only (3D-fibroblast dermis). However, the effect of the 3D-fibroblast dermis on the formation of functional epidermal TJs is unknown. In this study, we investigated the effect of the 3D-fibroblast dermis on the expression of TJ-related proteins and TJ function in LbL-3D Skin. We demonstrated that the 3D-fibroblast dermis affects the long-term expression of TJ-related proteins and the formation of TJ with barrier function in the epidermis. These results show that the 3D-fibroblast dermis in LbL-3D Skin contributes to the formation and maintenance of functional TJs as in native human skin by direct contact with KCs.
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Affiliation(s)
- Masato Murakami
- Department of Frontier Biosciences, Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takami Akagi
- Department of Frontier Biosciences, Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yumi Sasano
- Department of Frontier Biosciences, Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka 565-0871, Japan.,Pharma-Medicals Division, Life & Healthcare Products Department, Nagase & Co., Ltd., 2-2-3 Murotani, Nishi-ku, Kobe, Hyogo 651-2241, Japan
| | - Mitsuru Akashi
- Department of Frontier Biosciences, Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka 565-0871, Japan
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14
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Kader HA, Azeem M, Jwayed SA, Al-Shehhi A, Tabassum A, Ayoub MA, Hetta HF, Waheed Y, Iratni R, Al-Dhaheri A, Muhammad K. Current Insights into Immunology and Novel Therapeutics of Atopic Dermatitis. Cells 2021; 10:cells10061392. [PMID: 34200009 PMCID: PMC8226506 DOI: 10.3390/cells10061392] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 02/07/2023] Open
Abstract
Atopic dermatitis (AD) is one of the most prevalent inflammatory disease among non-fatal skin diseases, affecting up to one fifth of the population in developed countries. AD is characterized by recurrent pruritic and localized eczema with seasonal fluctuations. AD initializes the phenomenon of atopic march, during which infant AD patients are predisposed to progressive secondary allergies such as allergic rhinitis, asthma, and food allergies. The pathophysiology of AD is complex; onset of the disease is caused by several factors, including strong genetic predisposition, disrupted epidermal barrier, and immune dysregulation. AD was initially characterized by defects in the innate immune system and a vigorous skewed adaptive Th2 response to environmental agents; there are compelling evidences that the disorder involves multiple immune pathways. Symptomatic palliative treatment is the only strategy to manage the disease and restore skin integrity. Researchers are trying to more precisely define the contribution of different AD genotypes and elucidate the role of various immune axes. In this review, we have summarized the current knowledge about the roles of innate and adaptive immune responsive cells in AD. In addition, current and novel treatment strategies for the management of AD are comprehensively described, including some ongoing clinical trials and promising therapeutic agents. This information will provide an asset towards identifying personalized targets for better therapeutic outcomes.
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Affiliation(s)
- Hidaya A. Kader
- Department of Biology, College of Science, UAE University, Al Ain 15551, United Arab Emirates; (H.A.K.); (S.A.J.); (A.A.-S.); (M.A.A.); (R.I.)
| | - Muhammad Azeem
- Department of Pathology, University of Würzburg, 97080 Würzburg, Germany;
| | - Suhib A. Jwayed
- Department of Biology, College of Science, UAE University, Al Ain 15551, United Arab Emirates; (H.A.K.); (S.A.J.); (A.A.-S.); (M.A.A.); (R.I.)
| | - Aaesha Al-Shehhi
- Department of Biology, College of Science, UAE University, Al Ain 15551, United Arab Emirates; (H.A.K.); (S.A.J.); (A.A.-S.); (M.A.A.); (R.I.)
| | - Attia Tabassum
- Department of Dermatology, Mayo Hospital, Lahore 54000, Pakistan;
| | - Mohammed Akli Ayoub
- Department of Biology, College of Science, UAE University, Al Ain 15551, United Arab Emirates; (H.A.K.); (S.A.J.); (A.A.-S.); (M.A.A.); (R.I.)
| | - Helal F. Hetta
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut 71515, Egypt;
| | - Yasir Waheed
- Foundation University Medical College, Foundation University Islamabad, Islamabad 44000, Pakistan;
| | - Rabah Iratni
- Department of Biology, College of Science, UAE University, Al Ain 15551, United Arab Emirates; (H.A.K.); (S.A.J.); (A.A.-S.); (M.A.A.); (R.I.)
| | - Ahmed Al-Dhaheri
- Department of Dermatology, Tawam Hospital, Al Ain 15551, United Arab Emirates;
| | - Khalid Muhammad
- Department of Biology, College of Science, UAE University, Al Ain 15551, United Arab Emirates; (H.A.K.); (S.A.J.); (A.A.-S.); (M.A.A.); (R.I.)
- Correspondence:
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15
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Jevtić M, Löwa A, Nováčková A, Kováčik A, Kaessmeyer S, Erdmann G, Vávrová K, Hedtrich S. Impact of intercellular crosstalk between epidermal keratinocytes and dermal fibroblasts on skin homeostasis. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118722. [PMID: 32302667 DOI: 10.1016/j.bbamcr.2020.118722] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/01/2020] [Accepted: 04/09/2020] [Indexed: 10/24/2022]
Abstract
Dermal fibroblasts seem critical for epidermal maturation and differentiation and recent work demonstrated that diseased fibroblasts may drive pathophysiological processes. Nevertheless, still very little is known about the actual crosstalk between epidermal keratinocytes and dermal fibroblasts and the impact of dermal fibroblasts on epidermal maturation and differentiation. Aiming for a more fundamental understanding of the impact of the cellular crosstalk between keratinocytes and fibroblasts on the skin homeostasis, we generated full-thickness skin equivalents with and without fibroblasts and subsequently analysed them for the expression of skin differentiation markers, their barrier function, skin lipid content and epidermal cell signalling. Skin equivalents without fibroblasts consistently showed an impaired differentiation and dysregulated expression of skin barrier and tight junction proteins, increased skin permeability, and a decreased skin lipid/protein ratio. Most interestingly, impaired Ras/Raf/ERK/MEK signalling was evident in skin equivalents without fibroblasts. Our data clearly indicate that the epidermal-dermal crosstalk between keratinocytes and fibroblasts is critical for adequate skin differentiation and that fibroblasts orchestrate epidermal differentiation processes.
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Affiliation(s)
- Marijana Jevtić
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität Berlin, Germany
| | - Anna Löwa
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität Berlin, Germany
| | - Anna Nováčková
- Skin Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University, Czech Republic
| | - Andrej Kováčik
- Skin Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University, Czech Republic
| | - Sabine Kaessmeyer
- Department of Veterinary Medicine, Institute for Veterinary Anatomy, Freie Universität Berlin, Germany
| | | | - Kateřina Vávrová
- Skin Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University, Czech Republic
| | - Sarah Hedtrich
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität Berlin, Germany; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada.
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16
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Mainzer C, Remoué N, Molinari J, Rousselle P, Barricchello C, Lago JC, Sommer P, Sigaudo-Roussel D, Debret R. In vitro epidermis model mimicking IGF-1-specific age-related decline. Exp Dermatol 2019; 27:537-543. [PMID: 29603432 DOI: 10.1111/exd.13547] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2018] [Indexed: 12/13/2022]
Abstract
Ageing is a complex multifaceted process affecting skin functionality and structure. Several 3D organotypic skin culture models have reproduced ageing by inducing replicative senescence, glycation or oxidative stress. Yet, very few models have focused on hormonal ageing and especially the insulin-like growth factor 1 (IGF-1) signalling pathway, which has been associated with longevity in animal studies and is necessary for the early stages of skin development. In this study, we built an organotypic epidermis model with targeted IGF-1 receptor knockdown to reproduce some aspects of hormonal ageing on skin. Our model displayed morphological and functional features of aged epidermis, which were mostly attributed to a loss of function of the Stratum basale. IGF-1 receptor knockdown keratinocytes depicted an extended cell cycle, reduced proliferation potential and reduced adhesion capacities and greater sensitivity to oxidative stress than control cells. Altogether, this model represents an essential tool for further investigations into the mechanisms linked to some aspects of hormonal decline or when screening for potent anti-ageing compounds.
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Affiliation(s)
- Carine Mainzer
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, Lyon, France
| | - Noëlle Remoué
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, Lyon, France
| | - Jennifer Molinari
- Natura Inovação e Tecnologia de Produtos, Cajamar, São Paulo, Brasil
| | - Patricia Rousselle
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, Lyon, France
| | | | - Juliana C Lago
- Natura Inovação e Tecnologia de Produtos, Cajamar, São Paulo, Brasil
| | - Pascal Sommer
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, Lyon, France
| | - Dominique Sigaudo-Roussel
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, Lyon, France
| | - Romain Debret
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, Lyon, France
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17
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Peng Y, Wu S, Tang Q, Li S, Peng C. KGF-1 accelerates wound contraction through the TGF-β1/Smad signaling pathway in a double-paracrine manner. J Biol Chem 2019; 294:8361-8370. [PMID: 30894415 DOI: 10.1074/jbc.ra118.006189] [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: 10/10/2018] [Revised: 02/28/2019] [Indexed: 11/06/2022] Open
Abstract
KGF-1 plays an important role in the wound healing process. Loss of the KGF-1 gene in diabetic mice attenuated the process of wound contraction, suggesting that KGF-1 contributes to wound contraction. However, the mechanism remains unclear. To investigate the role of KGF-1 in diabetic wound contraction, we established a keratinocyte-fibroblast co-culture system. Concentrations of transforming growth factor β1 (TGF-β1) in conditioned supernatant treated with KGF-1 (KGF-1 group), tk;4KGF-1-neutralizing antibody (anti-KGF-1 group), TGF-β1 (TGF-β1tk;1 group), KGF-1 and TGF-β1-neutralizing antibody (KGF-1 + anti-TGF-β1 group) were tested by ELISA. Conditioned medium was added to fibroblast-populated collagen lattice (FPCL) to investigate the effect of KGF-1 on fibroblastqj contraction. TGF-β1, Col-I, p-Smad2, p-Smad3, and α-smooth muscle actin (α-SMA) were examined by Western blotting. A diabetic rat wound model was utilized to evaluate wound morphology, histology, immunohistochemistry, and protein expression in wound tissue after treatment with KGF-1. ELISA assays revealed that the concentration of TGF-β1 in the conditioned supernatant in the KGF-1 group was significantly higher. The contractile capacity of FPCL stimulated by conditioned medium derived from the KGF-1 group was significantly elevated; however, the contractile activity of FPCL induced by KGF-1 was attenuated by TGF-β1-neutralizing antibody. The Western blot results suggest that KGF-1 is able to stimulate TGF-β1 activation with increased Col-I, p-Smad2, p-Smad3, and α-SMA expression. Diabetic wounds treated with KGF-1 had a higher degree of contraction with significantly higher expression of TGF-β1, Col-I, p-Smad2, p-Smad3, and α-SMA. Our findings demonstrate that KGF-1 promotes fibroblast contraction and accelerates wound contraction via the TGF-β1/Smad signaling pathway in a double-paracrine manner.
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Affiliation(s)
- Yi Peng
- Department of Plastic Surgery and Orthopedic Surgery, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, China; Orthopedic Surgery, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, China
| | - Song Wu
- Orthopedic Surgery, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, China
| | - Qiyu Tang
- Department of Plastic Surgery and Orthopedic Surgery, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, China
| | - Shuaihua Li
- Department of Cosmetic and Plastic Surgery, First People's Hospital of Chenzhou, Chenzhou, Hunan 423000, China
| | - Cheng Peng
- Department of Plastic Surgery and Orthopedic Surgery, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, China.
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18
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Mainzer C, Packard T, Bordes S, Closs B, Greene WC, Elias PM, Uchida Y. Tissue microenvironment initiates an immune response to structural components of Staphylococcus aureus. Exp Dermatol 2019; 28:161-168. [PMID: 30566255 PMCID: PMC6706075 DOI: 10.1111/exd.13864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 11/13/2018] [Accepted: 12/13/2018] [Indexed: 01/10/2023]
Abstract
Cell-to-cell communication in skin participates to the maintenance of homeostatic responses to foreign substances. Certain strains of Staphylococcus (S) aureus are vicious pathogens that cause deleterious effects in host cells and tissues. Both secreted toxins and structural components of S. aureus trigger an immune response, though how S. aureus stimulates host immune responses is poorly understood. We explored here how keratinocytes and fibroblasts initiate the first steps of an immune response by activating dendritic cells (DCs) through recognition of structural components of S. aureus. We treated monocyte-derived Langerhans cells (moLCs) and monocyte-derived DCs (moDCs) with conditioned media from keratinocytes (K-CM) and fibroblasts (F-CM) treated with heat-killed S. aureus (HKSA) respectively, or directly with HKSA. Immune and inflammatory responses from keratinocytes, fibroblasts, moLCs and moDCs were assessed by analysis of cell surface markers and cytokine production using flow cytometry, real-time PCR and ELISA assays. K-CM and F-CM increased the expression of CD86 and HLA-DR on moLCs and moDCs, in association with a specific cytokine profile. K-CM upregulated TNFA, IL-1B and GM-CSF mRNA expression in moLCs, while F-CM upregulated IL-12 and downregulated TNFA and TGFB mRNA expression in moDCs. Additionally, F-CM attenuated the induction of an inflammatory profile in monocytes. The recognition of structural components from S. aureus by cutaneous microenvironment induces the activation and the expression of specific cytokines from LCs and DCs.
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Affiliation(s)
- Carine Mainzer
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, California
- SILAB Inc., Hazlet, New Jersey
| | - Thomas Packard
- Gladstone Institute of Virology and Immunology, University of California San Francisco, San Francisco, California
| | | | | | - Warner C. Greene
- Gladstone Institute of Virology and Immunology, University of California San Francisco, San Francisco, California
| | - Peter M. Elias
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, California
| | - Yoshikazu Uchida
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, California
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19
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Marsh E, Gonzalez DG, Lathrop EA, Boucher J, Greco V. Positional Stability and Membrane Occupancy Define Skin Fibroblast Homeostasis In Vivo. Cell 2018; 175:1620-1633.e13. [PMID: 30415836 DOI: 10.1016/j.cell.2018.10.013] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 09/10/2018] [Accepted: 10/02/2018] [Indexed: 01/15/2023]
Abstract
Fibroblasts are an essential cellular and structural component of our organs. Despite several advances, the critical behaviors that fibroblasts utilize to maintain their homeostasis in vivo have remained unclear. Here, by tracking the same skin fibroblasts in live mice, we show that fibroblast position is stable over time and that this stability is maintained despite the loss of neighboring fibroblasts. In contrast, fibroblast membranes are dynamic during homeostasis and extend to fill the space of lost neighboring fibroblasts in a Rac1-dependent manner. Positional stability is sustained during aging despite a progressive accumulation of gaps in fibroblast nuclei organization, while membrane occupancy continues to be maintained. This work defines positional stability and cell occupancy as key principles of skin fibroblast homeostasis in vivo, throughout the lifespan of mice, and identifies membrane extension in the absence of migration as the core cellular mechanism to carry out these principles.
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Affiliation(s)
- Edward Marsh
- Department of Genetics, Yale School of Medicine, New Haven, CT 06510, USA
| | - David G Gonzalez
- Department of Genetics, Yale School of Medicine, New Haven, CT 06510, USA
| | | | - Jonathan Boucher
- Department of Genetics, Yale School of Medicine, New Haven, CT 06510, USA
| | - Valentina Greco
- Department of Genetics, Yale School of Medicine, New Haven, CT 06510, USA; Departments of Dermatology & Cell Biology, Yale Stem Cell Center, Yale Cancer Center, Yale School of Medicine, New Haven, CT 06510, USA.
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20
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Hirobe T, Enami H. Histochemical study of the distribution of epidermal melanoblasts and melanocytes in Asian human skin. Skin Res Technol 2018; 25:299-304. [DOI: 10.1111/srt.12649] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 09/29/2018] [Indexed: 12/21/2022]
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21
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Tomic-Canic M, Wong LL, Smola H. The epithelialisation phase in wound healing: options to enhance wound closure. J Wound Care 2018; 27:646-658. [DOI: 10.12968/jowc.2018.27.10.646] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Majana Tomic-Canic
- Professor and Vice Chair of Research; Director, Wound Healing and Regenerative Medicine Research Program; Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami, Miller School of Medicine, Miami, Florida, US
| | - Lulu L. Wong
- MD Candidate; Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami, Miller School of Medicine, Miami, Florida, US
| | - Hans Smola
- Professor of Dermatology, Medical Director, PAUL HARTMANN AG, Heidenheim and Department of Dermatology, University of Cologne, Cologne, Germany
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22
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Cantin-Warren L, Guignard R, Cortez Ghio S, Larouche D, Auger FA, Germain L. Specialized Living Wound Dressing Based on the Self-Assembly Approach of Tissue Engineering. J Funct Biomater 2018; 9:jfb9030053. [PMID: 30223550 PMCID: PMC6165032 DOI: 10.3390/jfb9030053] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/30/2018] [Accepted: 09/10/2018] [Indexed: 12/24/2022] Open
Abstract
There is a high incidence of failure and recurrence for chronic skin wounds following conventional therapies. To promote healing, the use of skin substitutes containing living cells as wound dressings has been proposed. The aim of this study was to produce a scaffold-free cell-based bilayered tissue-engineered skin substitute (TES) containing living fibroblasts and keratinocytes suitable for use as wound dressing, while considering production time, handling effort during the manufacturing process, and stability of the final product. The self-assembly method, which relies on the ability of mesenchymal cells to secrete and organize connective tissue sheet sustaining keratinocyte growth, was used to produce TESs. Three fibroblast-seeding densities were tested to produce tissue sheets. At day 17, keratinocytes were added onto 1 or 3 (reference method) stacked tissue sheets. Four days later, TESs were subjected either to 4, 10, or 17 days of culture at the air–liquid interface (A/L). All resulting TESs were comparable in terms of their histological aspect, protein expression profile and contractile behavior in vitro. However, signs of extracellular matrix (ECM) digestion that progressed over culture time were noted in TESs produced with only one fibroblast-derived tissue sheet. With lower fibroblast density, the ECM of TESs was almost completely digested after 10 days A/L and lost histological integrity after grafting in athymic mice. Increasing the fibroblast seeding density 5 to 10 times solved this problem. We conclude that the proposed method allows for a 25-day production of a living TES, which retains its histological characteristics in vitro for at least two weeks.
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Affiliation(s)
- Laurence Cantin-Warren
- Centre de Recherche en Organogénèse Expérimentale de l'Université Laval/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Centre, Département de Chirurgie, Faculté de Médecine, Université Laval, 1401 18e Rue, Québec, Québec G1J 1Z4, Canada.
| | - Rina Guignard
- Centre de Recherche en Organogénèse Expérimentale de l'Université Laval/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Centre, Département de Chirurgie, Faculté de Médecine, Université Laval, 1401 18e Rue, Québec, Québec G1J 1Z4, Canada.
| | - Sergio Cortez Ghio
- Centre de Recherche en Organogénèse Expérimentale de l'Université Laval/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Centre, Département de Chirurgie, Faculté de Médecine, Université Laval, 1401 18e Rue, Québec, Québec G1J 1Z4, Canada.
| | - Danielle Larouche
- Centre de Recherche en Organogénèse Expérimentale de l'Université Laval/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Centre, Département de Chirurgie, Faculté de Médecine, Université Laval, 1401 18e Rue, Québec, Québec G1J 1Z4, Canada.
| | - François A Auger
- Centre de Recherche en Organogénèse Expérimentale de l'Université Laval/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Centre, Département de Chirurgie, Faculté de Médecine, Université Laval, 1401 18e Rue, Québec, Québec G1J 1Z4, Canada.
| | - Lucie Germain
- Centre de Recherche en Organogénèse Expérimentale de l'Université Laval/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Centre, Département de Chirurgie, Faculté de Médecine, Université Laval, 1401 18e Rue, Québec, Québec G1J 1Z4, Canada.
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Foxn1 in Skin Development, Homeostasis and Wound Healing. Int J Mol Sci 2018; 19:ijms19071956. [PMID: 29973508 PMCID: PMC6073674 DOI: 10.3390/ijms19071956] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 06/29/2018] [Accepted: 07/02/2018] [Indexed: 02/07/2023] Open
Abstract
Intensive research effort has focused on cellular and molecular mechanisms that regulate skin biology, including the phenomenon of scar-free skin healing during foetal life. Transcription factors are the key molecules that tune gene expression and either promote or suppress gene transcription. The epidermis is the source of transcription factors that regulate many functions of epidermal cells such as proliferation, differentiation, apoptosis, and migration. Furthermore, the activation of epidermal transcription factors also causes changes in the dermal compartment of the skin. This review focuses on the transcription factor Foxn1 and its role in skin biology. The regulatory function of Foxn1 in the skin relates to physiological (development and homeostasis) and pathological (skin wound healing) conditions. In particular, the pivotal role of Foxn1 in skin development and the acquisition of the adult skin phenotype, which coincides with losing the ability of scar-free healing, is discussed. Thus, genetic manipulations with Foxn1 expression, specifically those introducing conditional Foxn1 silencing in a Foxn1+/+ organism or its knock-in in a Foxn1−/− model, may provide future perspectives for regenerative medicine.
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Kim JY, Lee SH, Bae IH, Shin DW, Min D, Ham M, Kim KH, Lee TR, Kim HJ, Son ED, Lee AY, Song YW, Kil IS. Pyruvate Protects against Cellular Senescence through the Control of Mitochondrial and Lysosomal Function in Dermal Fibroblasts. J Invest Dermatol 2018; 138:2522-2530. [PMID: 29959907 DOI: 10.1016/j.jid.2018.05.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 05/17/2018] [Accepted: 05/30/2018] [Indexed: 10/28/2022]
Abstract
Mitochondrial dysfunction can drive cellular senescence, which is accompanied by changes in metabolism and increases in senescence-associated secretory phenotypes. Although pyruvate, a key metabolite for numerous aspects of metabolism, has been used as general supplement in synthetic media, the physiological function of pyruvate underlying its protective role against cellular senescence under normal conditions has remained unknown. Here, we show that extracellular pyruvate prevents senescence in normal human dermal fibroblasts through increasing the generation of oxidized nicotinamide adenine dinucleotide (NAD+) during the conversion to lactate. Acetylated peroxisome proliferator-activated receptor gamma coactivator 1α (PGC-1α), vacuolar-type H+-ATPaseV0A1 (v-ATPaseV0A1), NF-κB p65 subunit (RelA), and histone H3 accumulate under pyruvate deprivation conditions, resulting in the onset of senescence in normal human dermal fibroblasts through the accumulation of abnormal mitochondria generated by lysosomal inactivation-induced mitophagy defects, and through an increase in senescence-associated secretory phenotypes. Furthermore, pyruvate showed a protective effect against aging phenotypes in skin equivalents, which consist of a dermis and epidermis that act similarly to in vivo skin tissues. Our findings reveal a connection between pyruvate and mitochondrial dysfunction in the progression of senescence that is, to our knowledge, previously unreported. These results suggest that the pyruvate deprivation-induced senescence model can be used to study the connection between metabolism and senescence under normal conditions.
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Affiliation(s)
- Jeong Yeon Kim
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea; Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Sung Hoon Lee
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Il-Hong Bae
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Dong Wook Shin
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Daejin Min
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Mira Ham
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Kyu-Han Kim
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Tae Ryong Lee
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Hyoung-June Kim
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Eui Dong Son
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Ai-Yong Lee
- Department of Dermatology, Dongguk University Ilsan Hospital, Goyang-si, Gyeonggi-do, Republic of Korea
| | - Yeong Wook Song
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea; Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
| | - In Sup Kil
- Basic Research & Innovation Division, Amorepacific Corporation R&D Center, Yongin-si, Gyeonggi-do, Republic of Korea.
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25
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Li Z, Maitz P. Cell therapy for severe burn wound healing. BURNS & TRAUMA 2018; 6:13. [PMID: 29854856 PMCID: PMC5971426 DOI: 10.1186/s41038-018-0117-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 04/26/2018] [Indexed: 12/14/2022]
Abstract
Cell therapy has emerged as an important component of life-saving procedures in treating burns. Over past decades, advances in stem cells and regenerative medicine have offered exciting opportunities of developing cell-based alternatives and demonstrated the potential and feasibility of various stem cells for burn wound healing. However, there are still scientific and technical issues that should be resolved to facilitate the full potential of the cellular devices. More evidence from large, randomly controlled trials is also needed to understand the clinical impact of cell therapy in burns. This article aims to provide an up-to-date review of the research development and clinical applications of cell therapies in burn wound healing and skin regeneration.
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Affiliation(s)
- Zhe Li
- Burns Unit, Concord Hospital, Concord, New South Wales 2139 Australia
- Skin Laboratory, NSW Statewide Burns Service, Concord, New South Wales Australia
- Discipline of Surgery, University of Sydney Medical School, Camperdown, New South Wales Australia
| | - Peter Maitz
- Burns Unit, Concord Hospital, Concord, New South Wales 2139 Australia
- Skin Laboratory, NSW Statewide Burns Service, Concord, New South Wales Australia
- Discipline of Surgery, University of Sydney Medical School, Camperdown, New South Wales Australia
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26
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Hynds RE, Gowers KHC, Nigro E, Butler CR, Bonfanti P, Giangreco A, Prêle CM, Janes SM. Cross-talk between human airway epithelial cells and 3T3-J2 feeder cells involves partial activation of human MET by murine HGF. PLoS One 2018; 13:e0197129. [PMID: 29771943 PMCID: PMC5957441 DOI: 10.1371/journal.pone.0197129] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 04/26/2018] [Indexed: 01/13/2023] Open
Abstract
There is considerable interest in the ex vivo propagation of primary human basal epithelial stem/progenitor cells with a view to their use in drug development, toxicity testing and regenerative medicine. These cells can be expanded in co-culture with mitotically inactivated 3T3-J2 murine embryonic feeder cells but, similar to other epithelial cell culture systems employing 3T3-J2 cells, the aspects of cross-talk between 3T3-J2 cells and human airway basal cells that are critical for their expansion remain largely unknown. In this study, we investigated secreted growth factors that are produced by 3T3-J2 cells and act upon primary human airway basal cells. We found robust production of hepatocyte growth factor (HGF) from fibroblast feeder cells following mitotic inactivation. Consistent with the limited cross-species reactivity of murine HGF on the human HGF receptor (MET; HGFR), MET inhibition did not affect proliferative responses in human airway basal cells and HGF could not replace feeder cells in this culture system. However, we found that murine HGF is not completely inactive on human airway epithelial cells or cancer cell lines but stimulates the phosphorylation of GRB2-associated-binding protein 2 (GAB2) and signal transducer and activator of transcription 6 (STAT6). Although HGF induces phosphorylation of STAT6 tyrosine 641 (Y641), there is no subsequent STAT6 nuclear translocation or STAT6-driven transcriptional response. Overall, these findings highlight the relevance of cross-species protein interactions between murine feeder cells and human epithelial cells in 3T3-J2 co-culture and demonstrate that STAT6 phosphorylation occurs in response to MET activation in epithelial cells. However, STAT6 nuclear translocation does not occur in response to HGF, precluding the transcriptional activity of STAT6.
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Affiliation(s)
- Robert E. Hynds
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, United Kingdom
- CRUK Lung Cancer Centre of Excellence, UCL Cancer Institute, University College London, London, United Kingdom
- The Francis Crick Institute, London, United Kingdom
| | - Kate H. C. Gowers
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, United Kingdom
| | - Ersilia Nigro
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, United Kingdom
- Dipartimento di Scienze Cardio-Toraciche e Respiratorie, Universita’ degli Studi della Campania “L. Vanvitelli”, Naples, Italy
| | - Colin R. Butler
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, United Kingdom
| | - Paola Bonfanti
- The Francis Crick Institute, London, United Kingdom
- Stem Cell and Regenerative Medicine Section, UCL Institute of Child Health and Great Ormond Street Hospital, London, United Kingdom
- Institute of Immunity and Transplantation, University College London, London, United Kingdom
| | - Adam Giangreco
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, United Kingdom
| | - Cecilia M. Prêle
- Centre for Cell Therapy and Regenerative Medicine, School of Biomedical Sciences, The University of Western Australia, Perth, Australia
- Institute for Respiratory Health, University of Western Australia, Perth, Australia
| | - Sam M. Janes
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, United Kingdom
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Stunova A, Vistejnova L. Dermal fibroblasts—A heterogeneous population with regulatory function in wound healing. Cytokine Growth Factor Rev 2018; 39:137-150. [DOI: 10.1016/j.cytogfr.2018.01.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 01/11/2018] [Indexed: 02/06/2023]
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Cultured Human Epidermis Combined With Meshed Skin Autografts Accelerates Epithelialization and Granulation Tissue Formation in a Rat Model. Ann Plast Surg 2018; 78:651-658. [PMID: 28230648 PMCID: PMC5434968 DOI: 10.1097/sap.0000000000001058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION As the take rate of cultured epidermal autografts in burn wound treatment is variable, widely expanded meshed auto skin grafts are often used in combination with cultured epidermal autograft to increase the take rate and achieve definitive wound coverage. However, a long time (3-4 weeks) required to prepare a cultured epidermis sheet is a disadvantage. Allogeneic cultured epidermis can be prepared in advance and cryopreserved to be used in combination with auto meshed skin grafts for treating third-degree burns. Nevertheless, the human cultured epidermis (hCE) has not been proved to accelerate wound healing after meshed skin grafting. Here, we investigated the effect of hCE on wound healing in a rat model of meshed skin grafting. MATERIALS AND METHODS Human cultured epidermis was prepared from human neonatal foreskin and assessed by the release of growth factors into the culture medium using enzyme-linked immunosorbent assay. Skin wounds were inflicted on male F344 rats and treated by the application of widely meshed (6:1 ratio) autogenous skin grafts with or without hCE (n = 8 rats per group). Wound area, neoepithelium length, granulation tissue formation, and neovascularization were evaluated on day 7 postgrafting. RESULTS Human cultured epidermis secreted IL-1α, Basic fibroblast growth factor, platelet-derived growth factor-AA, TGF-α, TGF-β1, and vascular endothelial growth factor in vitro. In rats, hCE accelerated wound closure (P = 0.003), neoepithelium growth (P = 0.019), and granulation tissue formation (P = 0.043), and increased the number of capillaries (P = 0.0003) and gross neovascularization area (P = 0.008) compared with the control group. CONCLUSIONS The application of hCE with meshed grafts promoted wound closure, possibly via secretion of growth factors critical for cell proliferation and migration, suggesting that hCE can enhance the healing effect of widely expanded skin autografts.
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29
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Gabbott CM, Sun T. Comparison of Human Dermal Fibroblasts and HaCat Cells Cultured in Medium with or without Serum via a Generic Tissue Engineering Research Platform. Int J Mol Sci 2018; 19:ijms19020388. [PMID: 29382087 PMCID: PMC5855610 DOI: 10.3390/ijms19020388] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 01/25/2018] [Accepted: 01/25/2018] [Indexed: 12/16/2022] Open
Abstract
A generic research platform with 2-dimensional (2D) cell culture technology, a 3-dimensional (3D) in vitro tissue model, and a scaled-down cell culture and imaging system in between, was utilized to address the problematic issues associated with the use of serum in skin tissue engineering. Human dermal fibroblasts (HDFs) and immortalized keratinocytes (HaCat cells) mono- or co-cultured in serum or serum-free medium were compared and analyzed via the platform. It was demonstrated that serum depletion had significant influence on the attachment of HaCat cells onto tissue culture plastic (TCP), porous substrates and cellulosic scaffolds, which was further enhanced by the pre-seeded HDFs. The complex structures formed by the HDFs colonized within the porous substrates and scaffolds not only prevented the seeded HaCat cells from filtering through the open pores, but also acted as cellular substrates for HaCat cells to attach onto. When mono-cultured on TCP, both HDFs and HaCat cells were less proliferative in medium without serum than with serum. However, both cell types were successfully co-cultured in 2D using serum-free medium if the initial cell seeding density was higher than 80,000 cells/cm2 (with 1:1 ratio). Based on the results from 2D cultures, co-culture of both cell types on modular substrates with small open pores (125 μm) and cellulosic scaffolds with open pores of varying sizes (50–300 µm) were then conducted successfully in serum-free medium. This study demonstrated that the generic research platform had great potential for in-depth understanding of HDFs and HaCat cells cultivated in serum-free medium, which could inform the processes for manufacturing skin cells or tissues for clinical applications.
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Affiliation(s)
- Christopher Michael Gabbott
- Centre for Biological Engineering, Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough LE11 3TU, UK.
| | - Tao Sun
- Centre for Biological Engineering, Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough LE11 3TU, UK.
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30
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Lynch MD, Watt FM. Fibroblast heterogeneity: implications for human disease. J Clin Invest 2018; 128:26-35. [PMID: 29293096 DOI: 10.1172/jci93555] [Citation(s) in RCA: 278] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Fibroblasts synthesize the extracellular matrix of connective tissue and play an essential role in maintaining the structural integrity of most tissues. Researchers have long suspected that fibroblasts exhibit functional specialization according to their organ of origin, body site, and spatial location. In recent years, a number of approaches have revealed the existence of fibroblast subtypes in mice. Here, we discuss fibroblast heterogeneity with a focus on the mammalian dermis, which has proven an accessible and tractable system for the dissection of these relationships. We begin by considering differences in fibroblast identity according to anatomical site of origin. Subsequently, we discuss new results relating to the existence of multiple fibroblast subtypes within the mouse dermis. We consider the developmental origin of fibroblasts and how this influences heterogeneity and lineage restriction. We discuss the mechanisms by which fibroblast heterogeneity arises, including intrinsic specification by transcriptional regulatory networks and epigenetic factors in combination with extrinsic effects of the spatial context within tissue. Finally, we discuss how fibroblast heterogeneity may provide insights into pathological states including wound healing, fibrotic diseases, and aging. Our evolving understanding suggests that ex vivo expansion or in vivo inhibition of specific fibroblast subtypes may have important therapeutic applications.
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Affiliation(s)
- Magnus D Lynch
- King's College London Centre for Stem Cells and Regenerative Medicine, Guy's Hospital, Great Maze Pond, London, United Kingdom.,St John's Institute of Dermatology, King's College London, London, United Kingdom
| | - Fiona M Watt
- King's College London Centre for Stem Cells and Regenerative Medicine, Guy's Hospital, Great Maze Pond, London, United Kingdom
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31
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Human Papillomavirus and the Stroma: Bidirectional Crosstalk during the Virus Life Cycle and Carcinogenesis. Viruses 2017; 9:v9080219. [PMID: 28792475 PMCID: PMC5580476 DOI: 10.3390/v9080219] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 08/03/2017] [Accepted: 08/04/2017] [Indexed: 12/22/2022] Open
Abstract
Human papillomaviruses (HPVs) are double-stranded DNA (dsDNA) tumor viruses that are causally associated with human cancers of the anogenital tract, skin, and oral cavity. Despite the availability of prophylactic vaccines, HPVs remain a major global health issue due to inadequate vaccine availability and vaccination coverage. The HPV life cycle is established and completed in the terminally differentiating stratified epithelia, and decades of research using in vitro organotypic raft cultures and in vivo genetically engineered mouse models have contributed to our understanding of the interactions between HPVs and the epithelium. More recently, important and emerging roles for the underlying stroma, or microenvironment, during the HPV life cycle and HPV-induced disease have become clear. This review discusses the current understanding of the bidirectional communication and relationship between HPV-infected epithelia and the surrounding microenvironment. As is the case with other human cancers, evidence suggests that the stroma functions as a significant partner in tumorigenesis and helps facilitate the oncogenic potential of HPVs in the stratified epithelium.
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Lotz C, Schmid FF, Oechsle E, Monaghan MG, Walles H, Groeber-Becker F. Cross-linked Collagen Hydrogel Matrix Resisting Contraction To Facilitate Full-Thickness Skin Equivalents. ACS APPLIED MATERIALS & INTERFACES 2017; 9:20417-20425. [PMID: 28557435 DOI: 10.1021/acsami.7b04017] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Full-thickness skin equivalents are gathering increased interest as skin grafts for the treatment of large skin defects or chronic wounds or as nonanimal test platforms. However, their fibroblast-mediated contraction and poor mechanical stability lead to disadvantages toward their reproducibility and applicability in vitro and in vivo. To overcome these pitfalls, we aimed to chemically cross-link the dermal layer of a full-thickness skin model composed of a collagen type I hydrogel. Using a noncytotoxic four-arm succinimidyl glutarate polyethylene glycol (PEG-SG), cross-linking could be achieved in cell seeded collagen hydrogels. A concentration of 0.5 mg of PEG-SG/mg of collagen led to a viability comparable to non-cross-linked collagen hydrogels and no increased release of intracellular lactate dehydrogenase. Cross-linked collagen hydrogels were more mechanically stable and less prone to enzymatic degradation via collagenase when compared with non-cross-linked collagen hydrogels. Remarkably, during 21 days, cross-linked collagen hydrogels maintain their initial surface area, whereas standard dermal models contracted up to 50%. Finally, full-thickness skin equivalents were generated by seeding human epidermal keratinocytes on the surface of the equivalents and culturing these equivalents at an air-liquid interface. Immunohistochemical stainings of the cross-linked model revealed well-defined epidermal layers including an intact stratum corneum and a dermal part with homogeneously distributed human dermal fibroblasts. These results indicate that cross-linking of collagen with PEG-SG reduces contraction of collagen hydrogels and thus increases the applicability of these models as an additional tool for efficacy and safety assessment or a new generation of skin grafts.
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Affiliation(s)
- Christian Lotz
- Department of Tissue Engineering & Regenerative Medicine (TERM), University Hospital Würzburg , Würzburg 97070, Germany
| | - Freia F Schmid
- Translational Center Würzburg 'Regenerative Therapies in Oncology and Musculoskeletal Diseases', Würzburg Branch of the Fraunhofer Institute for Interfacial Engineering and Biotechnology , Würzburg 97070, Germany
| | - Eva Oechsle
- Translational Center Würzburg 'Regenerative Therapies in Oncology and Musculoskeletal Diseases', Würzburg Branch of the Fraunhofer Institute for Interfacial Engineering and Biotechnology , Würzburg 97070, Germany
| | - Michael G Monaghan
- Department of Cell and Tissue Engineering, Fraunhofer Institute for Interfacial Engineering and Biotechnology , Stuttgart 70569, Germany
| | - Heike Walles
- Department of Tissue Engineering & Regenerative Medicine (TERM), University Hospital Würzburg , Würzburg 97070, Germany
- Translational Center Würzburg 'Regenerative Therapies in Oncology and Musculoskeletal Diseases', Würzburg Branch of the Fraunhofer Institute for Interfacial Engineering and Biotechnology , Würzburg 97070, Germany
| | - Florian Groeber-Becker
- Translational Center Würzburg 'Regenerative Therapies in Oncology and Musculoskeletal Diseases', Würzburg Branch of the Fraunhofer Institute for Interfacial Engineering and Biotechnology , Würzburg 97070, Germany
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Yanaga H, Udoh Y, Yamamoto M, Yoshii S, Mori S, Yamauchi T, Kiyokawa K, Koga M, Yanaga K. Cryopreserved cultured epithelial allografts for pediatric deep partial dermal burns: Early wound closure and suppression of scarring. Regen Ther 2017; 6:74-82. [PMID: 30271841 PMCID: PMC6134912 DOI: 10.1016/j.reth.2017.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 03/10/2017] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND In deep partial thickness dermal burns (DDB) where greater than 50% of the dermis is lost, severe pain, scarring and contractures occur. Therefore, skin grafting may be required. In children, scar contracture occurs because scarred skin does not stretch with growth creating the need for additional scar-releasing or skin-grafting surgeries. In order to resolve this problem, we used cryopreserved cultured epithelial allograft (cryopreserved allo-CEG), which can be grafted shortly after sustaining a wound. We reevaluated the promotion of early wound closure of burns and suppression of scarring by this treatment. METHODS Cryopreserved allo-CEGs were used to treat 50 cases of pediatric DDB from 1992 to 2000. These cases were reviewed with regard to the time until epithelialization, take percentage, and pain level. Also, in order to examine why cryopreserved allo-CEG promotes healing of burns and suppresses scarring, growth factors and cytokines in the cryopreserved allo-CEG were measured. Cryopreserved allo-CEG sheets were solubilized and concentrations of TGF-α, TGF-β1, IL-1α, IL-1β, PDGF-AA, VEGF, KGF, IL-6, b-FGF, as well as metalloprotease-1 (MMP-1) and HGF, which are noted to have scarring suppression effects, were measured before grafting. RESULTS Grafting of cryopreserved allo-CEGs in 50 cases of childhood DDB resulted in early epithelialization (9.32 ± 3.63 days on the average) and an almost 100% take rate. Also, pain relief (pain reduction or elimination, reduced need for anesthetics) was seen in all cases. Although 15-23 years have now elapsed, adverse events have not been observed. Cryopreserved allo-CEG contains IL-1α, IL-1β, PDGF-AA, TGF-α, TGF-β1, VEGF, and IL-6 have wound healing effects. The concentration of IL-1α was higher than the concentrations of other components, and this was followed by TGF-α, TGF-β1, b-FGF and VEGF. Although the concentration of MMP-1, which has a scarring suppression effect, was high, HGF was not detected. CONCLUSION Cryopreserved allo-CEG contains growth factors that promote wound healing and factors that suppress scarring. Three effects, namely (1) early wound closure, (2) scarring suppression, and (3) pain relief were seen with grafts of cryopreserved allo-CEG in cases of childhood DDB. These observations show that cryopreserved allo-CEG is clinically useful and effective for the treatment of childhood DDB.
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Affiliation(s)
- Hiroko Yanaga
- Yanaga Clinic and Tissue Culture Laboratory, 1-2-12 Tenjin, Chuo-ku, Fukuoka 810-0001, Japan
| | - Yukihiro Udoh
- Kurume University, Department of Plastic and Reconstructive Surgery and Maxillofacial Surgery, 67 Asahi-machi, Kurume, Fukuoka 830-0011, Japan
| | - Misa Yamamoto
- Yamaguchi University School of Medicine, Faculty of Health Sciences, 1-1-1 Minami-Ogushi, Ube, Yamaguchi 755-8505, Japan
| | - Satoko Yoshii
- Kurume University, Department of Plastic and Reconstructive Surgery and Maxillofacial Surgery, 67 Asahi-machi, Kurume, Fukuoka 830-0011, Japan
| | - Seiichiro Mori
- Kurume University, Department of Plastic and Reconstructive Surgery and Maxillofacial Surgery, 67 Asahi-machi, Kurume, Fukuoka 830-0011, Japan
| | - Toshihiko Yamauchi
- Kurume University, Department of Plastic and Reconstructive Surgery and Maxillofacial Surgery, 67 Asahi-machi, Kurume, Fukuoka 830-0011, Japan
| | - Kensuke Kiyokawa
- Kurume University, Department of Plastic and Reconstructive Surgery and Maxillofacial Surgery, 67 Asahi-machi, Kurume, Fukuoka 830-0011, Japan
| | - Mika Koga
- Yanaga Clinic and Tissue Culture Laboratory, 1-2-12 Tenjin, Chuo-ku, Fukuoka 810-0001, Japan
| | - Katsu Yanaga
- Yanaga Clinic and Tissue Culture Laboratory, 1-2-12 Tenjin, Chuo-ku, Fukuoka 810-0001, Japan
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Hirobe T, Shibata T, Sato K. Human fibroblasts treated with hydrogen peroxide stimulate human melanoblast proliferation and melanocyte differentiation, but inhibit melanocyte proliferation in serum-free co-culture system. J Dermatol Sci 2016; 84:282-295. [DOI: 10.1016/j.jdermsci.2016.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 08/16/2016] [Accepted: 09/05/2016] [Indexed: 02/05/2023]
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Basso FG, Soares DG, Pansani TN, Turrioni APS, Scheffel DL, Hebling J, Costa CADS. Response of a co-culture model of epithelial cells and gingival fibroblasts to zoledronic acid. Braz Oral Res 2016; 30:e122. [PMID: 27901204 DOI: 10.1590/1807-3107bor-2016.vol30.0122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 08/16/2016] [Indexed: 11/22/2022] Open
Abstract
Osteonecrosis of the jaw is an adverse effect of bisphosphonates. While the etiopathogenesis of this condition has been investigated, the interactions and effects of bisphosphonates on oral mucosa cells remain unclear. It is hypothesized that cell culture models, such as co-culture or three-dimensional cell culture models, can provide valuable insight. Therefore, the aim of this study was to evaluate the effects of zoledronic acid (ZA) on epithelial cells and gingival fibroblasts in a co-culture model. Briefly, epithelial cells were seeded on transwell inserts and gingival fibroblasts were seeded in the lower well of 24-well plates. The latter were treated with ZA (5 μM) for 24 or 48 h. Cell viability and synthesis of the inflammatory chemokine, CCL2, were subsequently assessed. Data were subjected to statistical analysis with a 5% significance level. In the presence of ZA, the epithelial cells exhibited significant toxicity in both cell culture models and at both time points. However, greater cytotoxicity was observed in the co-culture model. Greater viability for the gingival fibroblasts was also associated with the co-culture model, and ZA-mediated toxicity was observed for the 48 h time point. ZA promoted a significant increase in CCL2 synthesis in both sets of cells, with greater CCL2 synthesis detected in the gingival fibroblasts. However, this effect was diminished in the co-culture model. Taken together, these results confirm the specific response patterns of the cells seeded in the co-culture model and also demonstrate the protective mechanism that is mediated by epithelial/mesenchymal cell interactions upon exposure to ZA.
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Affiliation(s)
| | - Diana Gabriela Soares
- Universidade Estadual Paulista - UNESP, Araraquara School of Dentistry, Araraquara, SP, Brazil
| | - Taisa Nogueira Pansani
- Universidade Estadual Paulista - UNESP, Araraquara School of Dentistry, Araraquara, SP, Brazil
| | | | - Débora Lopes Scheffel
- Universidade Estadual Paulista - UNESP, Araraquara School of Dentistry, Araraquara, SP, Brazil
| | - Josimeri Hebling
- Universidade Estadual Paulista - UNESP, Araraquara School of Dentistry, Araraquara, SP, Brazil
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Vorstenbosch J, Nguyen CM, Zhou S, Seo YJ, Siblini A, Finnson KW, Bizet AA, Tran SD, Philip A. Overexpression of CD109 in the Epidermis Differentially Regulates ALK1 Versus ALK5 Signaling and Modulates Extracellular Matrix Synthesis in the Skin. J Invest Dermatol 2016; 137:641-649. [PMID: 27866969 DOI: 10.1016/j.jid.2016.09.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Accepted: 09/25/2016] [Indexed: 12/16/2022]
Abstract
Transforming growth factor-β (TGF-β) is a multifunctional growth factor involved in many physiological processes including wound healing and inflammation. Excessive TGF-β signaling in the skin has been implicated in fibrotic skin disorders such as keloids and scleroderma. We previously identified CD109 as a TGF-β co-receptor and inhibitor of TGF-β signaling and have shown that transgenic mice overexpressing CD109 in the epidermis display decreased scarring. In certain cell types, in addition to the canonical type I receptor, ALK5, which activates Smad2/3, TGF-β can signal through another type I receptor, ALK1, which activates Smad1/5. Here we demonstrate that ALK1 is expressed and co-localizes with CD109 in mouse keratinocytes and that mice overexpressing CD109 in the epidermis display enhanced ALK1-Smad1/5 signaling but decreased ALK5-Smad2/3 signaling, TGF-β expression, and extracellular matrix production in the skin when compared with wild-type littermates. Furthermore, treatment with conditioned media from isolated keratinocytes or epidermal explants from CD109 transgenic mouse skin leads to a decrease in extracellular matrix production in mouse skin fibroblasts. Taken together, our findings suggest that CD109 differentially regulates TGF-β-induced ALK1-Smad1/5 versus ALK5-Smad2/3 pathways, leading to decreased extracellular matrix production in the skin and that epidermal CD109 expression regulates dermal function through a paracrine mechanism.
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Affiliation(s)
- Joshua Vorstenbosch
- Division of Plastic Surgery, Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Christopher M Nguyen
- Division of Plastic Surgery, Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Shufeng Zhou
- Division of Plastic Surgery, Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - You Jung Seo
- Faculty of Dentistry, McGill University, McGill University, Montreal, Canada
| | - Aya Siblini
- Division of Plastic Surgery, Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Kenneth W Finnson
- Division of Plastic Surgery, Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Albane A Bizet
- Division of Plastic Surgery, Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Simon D Tran
- Faculty of Dentistry, McGill University, McGill University, Montreal, Canada
| | - Anie Philip
- Division of Plastic Surgery, Department of Surgery, McGill University, Montreal, Quebec, Canada.
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Amano S. Characterization and mechanisms of photoageing-related changes in skin. Damages of basement membrane and dermal structures. Exp Dermatol 2016; 25 Suppl 3:14-9. [DOI: 10.1111/exd.13085] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2016] [Indexed: 11/28/2022]
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Platelet-derived growth factor regulates the proliferation and differentiation of human melanocytes in a differentiation-stage-specific manner. J Dermatol Sci 2016; 83:200-9. [PMID: 27289338 DOI: 10.1016/j.jdermsci.2016.05.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 04/26/2016] [Accepted: 05/17/2016] [Indexed: 02/07/2023]
Abstract
BACKGROUND Although many kinds of keratinocyte-derived factors are known to regulate the proliferation and differentiation of human melanocytes, it is not well defined whether dermis-derived factors work in a similar way. OBJECTIVE The aim of this study is to clarify whether dermal factors are involved in regulating the proliferation and differentiation of human melanocytes. METHODS Human epidermal melanoblasts were cultured serially in a serum-free growth medium. Platelet-derived growth factor-BB (PDGF-BB) was supplemented to the medium, and the effects on the proliferation of melanoblasts/melanocytes and the differentiation of melanocytes were studied. RESULTS PDGF-BB stimulated the proliferation of melanoblasts cultured in melanoblast-proliferation medium, but inhibited the proliferation of melanocytes cultured in melanocyte-proliferation medium. By contrast, PDGF-BB stimulated the differentiation, dendritogenesis, and melanogenesis of melanocytes through the stimulation of tyrosinase activity and the expressions of tyrosinase and tyrosinase-related protein-1. CONCLUSION These results suggest that PDGF-BB regulates the proliferation and differentiation of human melanocytes in a differentiation-stage-specific manner. PDGF-BB seems to be one of the dermal factors that regulate the proliferation and differentiation of human melanocytes.
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Gubán B, Vas K, Balog Z, Manczinger M, Bebes A, Groma G, Széll M, Kemény L, Bata-Csörgő Z. Abnormal regulation of fibronectin production by fibroblasts in psoriasis. Br J Dermatol 2016; 174:533-41. [PMID: 26471375 DOI: 10.1111/bjd.14219] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2015] [Indexed: 12/13/2022]
Abstract
BACKGROUND Data indicate that in psoriasis, abnormalities are already present in nonlesional skin. Transforming growth factor-β and keratinocyte growth factor (KGF), together with fibronectin and α5β1 integrin, were suggested to play a crucial role in the pathogenesis of psoriasis by influencing inflammation and keratinocyte hyperproliferation. OBJECTIVES To investigate the expression of KGF, fibroblast growth factor receptor (FGFR)2, fibronectin (FN) and extra domain A (EDA)-positive FN in healthy and nonlesional psoriatic skin, and to study the effect of KGF on the regulation of FN and EDA(+) FN production by fibroblasts. METHODS Healthy, nonlesional psoriatic skin and lesional psoriatic skin were immunostained for α5 integrin, KGF, FGFR2, EDA(+) FN and signal transducer and activator of transcription (STAT)1. KGF-treated cell cultures were analysed for FN and EDA(+) FN mRNA and protein by real-time reverse-transcriptase polymerase chain reaction and flow cytometry, respectively. The major downstream signalling of KGF was investigated by blocking experiments using inhibitors of mitogen-activated protein kinase (MAPK) kinase (MEK1), AKT1/2, STAT1 and STAT3. RESULTS The expression of α5 integrin, EDA(+) FN, KGF and its receptor FGFR2 is elevated in psoriatic nonlesional skin compared with healthy skin. KGF mildly induced EDA(+) FN, but not FN expression in healthy fibroblasts through MAPK signalling. Fibroblasts express the FGFR2-IIIc splice variant. STAT1 negatively regulates both FN and EDA(+) FN expression in healthy fibroblasts, and this regulation is compromised in fibroblasts derived from nonlesional psoriatic dermis. We detected active STAT1 in healthy and lesional skin, similarly to a previous report. However, in the nonlesional skin STAT1 activation was absent in tissues far away from lesions. CONCLUSIONS The production of FN and EDA(+) FN by fibroblasts and the signalling of STAT1 are abnormally regulated in psoriatic nonlesional skin.
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Affiliation(s)
- B Gubán
- Department of Dermatology and Allergology, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
| | - K Vas
- Department of Dermatology and Allergology, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
| | - Z Balog
- Department of Dermatology and Allergology, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
| | - M Manczinger
- Department of Dermatology and Allergology, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
| | - A Bebes
- Department of Dermatology and Allergology, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
| | - G Groma
- MTA-SZTE Dermatological Research Group, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
| | - M Széll
- MTA-SZTE Dermatological Research Group, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary.,Department of Medical Genetics, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
| | - L Kemény
- Department of Dermatology and Allergology, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary.,MTA-SZTE Dermatological Research Group, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
| | - Z Bata-Csörgő
- Department of Dermatology and Allergology, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary.,MTA-SZTE Dermatological Research Group, University of Szeged, Korányi fasor 6, H-6720, Szeged, Hungary
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Tokuyama E, Nagai Y, Takahashi K, Kimata Y, Naruse K. Mechanical Stretch on Human Skin Equivalents Increases the Epidermal Thickness and Develops the Basement Membrane. PLoS One 2015; 10:e0141989. [PMID: 26528823 PMCID: PMC4631345 DOI: 10.1371/journal.pone.0141989] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 10/15/2015] [Indexed: 11/18/2022] Open
Abstract
All previous reports concerning the effect of stretch on cultured skin cells dealt with experiments on epidermal keratinocytes or dermal fibroblasts alone. The aim of the present study was to develop a system that allows application of stretch stimuli to human skin equivalents (HSEs), prepared by coculturing of these two types of cells. In addition, this study aimed to analyze the effect of a stretch on keratinization of the epidermis and on the basement membrane. HSEs were prepared in a gutter-like structure created with a porous silicone sheet in a silicone chamber. After 5-day stimulation with stretching, HSEs were analyzed histologically and immunohistologically. Stretch-stimulated HSEs had a thicker epidermal layer and expressed significantly greater levels of laminin 5 and collagen IV/VII in the basal layer compared with HSEs not subjected to stretch stimulation. Transmission electron microscopy revealed that the structure of the basement membrane was more developed in HSEs subjected to stretching. Our model may be relevant for extrapolating the effect of a stretch on the skin in a state similar to an in vivo system. This experimental system may be useful for analysis of the effects of stretch stimuli on skin properties and wound healing and is also expected to be applicable to an in vitro model of a hypertrophic scar in the future.
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Affiliation(s)
- Eijiro Tokuyama
- The Department of Plastic and Reconstructive Surgery, Okayama University Graduate School of Medicine, Okayama, Japan
| | | | - Ken Takahashi
- The Department of Cardiovascular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yoshihiro Kimata
- The Department of Plastic and Reconstructive Surgery, Okayama University Graduate School of Medicine, Okayama, Japan
| | - Keiji Naruse
- The Department of Cardiovascular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Naturally Occurring Extracellular Matrix Scaffolds for Dermal Regeneration: Do They Really Need Cells? BIOMED RESEARCH INTERNATIONAL 2015; 2015:839694. [PMID: 26509165 PMCID: PMC4609781 DOI: 10.1155/2015/839694] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 04/19/2015] [Accepted: 04/19/2015] [Indexed: 01/09/2023]
Abstract
The pronounced effect of extracellular matrix (ECM) scaffolds in supporting tissue regeneration is related mainly to their maintained 3D structure and their bioactive components. These decellularized matrix scaffolds could be revitalized before grafting via adding stem cells, fibroblasts, or keratinocytes to promote wound healing. We reviewed the online published literature in the last five years for the studies that performed ECM revitalization and discussed the results of these studies and the related literature. Eighteen articles met the search criteria. Twelve studies included adding cells to acellular dermal matrix (ADM), 3 studies were on small intestinal mucosa (SIS), one study was on urinary bladder matrix (UBM), one study was on amniotic membrane, and one study included both SIS and ADM loaded constructs. We believe that, in chronic and difficult-to-heal wounds, revitalizing the ECM scaffolds would be beneficial to overcome the defective host tissue interaction. This belief still has to be verified by high quality randomised clinical trials, which are still lacking in literature.
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Dermal fibroblast expression of stromal cell-derived factor-1 (SDF-1) promotes epidermal keratinocyte proliferation in normal and diseased skin. Protein Cell 2015; 6:890-903. [PMID: 26296527 PMCID: PMC4656211 DOI: 10.1007/s13238-015-0198-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 07/16/2015] [Indexed: 01/24/2023] Open
Abstract
Stromal cells provide a crucial microenvironment for overlying epithelium. Here we investigated the expression and function of a stromal cell-specific protein, stromal cell-derived factor-1 (SDF-1), in normal human skin and in the tissues of diseased skin. Immunohistology and laser capture microdissection (LCM)-coupled quantitative real-time RT-PCR revealed that SDF-1 is constitutively and predominantly expressed in dermal stromal cells in normal human skin in vivo. To our surprise, an extremely high level of SDF-1 transcription was observed in the dermis of normal human skin in vivo, evidenced by much higher mRNA expression level than type I collagen, the most abundant and highly expressed protein in human skin. SDF-1 was also upregulated in the tissues of many human skin disorders including psoriasis, basal cell carcinoma (BCC), and squamous cell carcinoma (SCC). Double immunostaining for SDF-1 and HSP47 (heat shock protein 47), a marker of fibroblasts, revealed that fibroblasts were the major source of stroma-cell-derived SDF-1 in both normal and diseased skin. Functionally, SDF-1 activates the ERK (extracellular-signal-regulated kinases) pathway and functions as a mitogen to stimulate epidermal keratinocyte proliferation. Both overexpression of SDF-1 in dermal fibroblasts and treatment with rhSDF-1 to the skin equivalent cultures significantly increased the number of keratinocyte layers and epidermal thickness. Conversely, the stimulative function of SDF-1 on keratinocyte proliferation was nearly completely eliminated by interfering with CXCR4, a specific receptor of SDF-1, or by knock-down of SDF-1 in fibroblasts. Our data reveal that extremely high levels of SDF-1 provide a crucial microenvironment for epidermal keratinocyte proliferation in both physiologic and pathologic skin conditions.
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Fibroblast heterogeneity and its implications for engineering organotypic skin models in vitro. Eur J Cell Biol 2015; 94:483-512. [PMID: 26344860 DOI: 10.1016/j.ejcb.2015.08.001] [Citation(s) in RCA: 168] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 08/11/2015] [Accepted: 08/11/2015] [Indexed: 12/19/2022] Open
Abstract
Advances in cell culture methods, multidisciplinary research, clinical need to replace lost skin tissues and regulatory need to replace animal models with alternative test methods has led to development of three dimensional models of human skin. In general, these in vitro models of skin consist of keratinocytes cultured over fibroblast-populated dermal matrices. Accumulating evidences indicate that mesenchyme-derived signals are essential for epidermal morphogenesis, homeostasis and differentiation. Various studies show that fibroblasts isolated from different tissues in the body are dynamic in nature and are morphologically and functionally heterogeneous subpopulations. Further, these differences seem to be dictated by the local biological and physical microenvironment the fibroblasts reside resulting in "positional identity or memory". Furthermore, the heterogeneity among the fibroblasts play a critical role in scarless wound healing and complete restoration of native tissue architecture in fetus and oral mucosa; and excessive scar formation in diseased states like keloids and hypertrophic scars. In this review, we summarize current concepts about the heterogeneity among fibroblasts and their role in various wound healing environments. Further, we contemplate how the insights on fibroblast heterogeneity could be applied for the development of next generation organotypic skin models.
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Seeger MA, Paller AS. The Roles of Growth Factors in Keratinocyte Migration. Adv Wound Care (New Rochelle) 2015; 4:213-224. [PMID: 25945284 DOI: 10.1089/wound.2014.0540] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 05/07/2014] [Indexed: 01/10/2023] Open
Abstract
Significance: The re-epithelialization of wounded skin requires the rapid and coordinated migration of keratinocytes (KC) into the wound bed. Almost immediately after wounding, cells present at or attracted to the wound site begin to secrete a complex milieu of growth factors. These growth factors exert mitogenic and motogenic effects on KCs, inducing the rapid proliferation and migration of KCs at the wound edge. Recent Advances: New roles for growth factors in KC biology are currently being discovered and investigated. This review will highlight the growth factors, particularly transforming growth factor-α (TGF-α), heparin-binding epidermal growth factor (HB-EGF), insulin-like growth factor 1 (IGF-1), fibroblast growth factor 7 (FGF-7), FGF-10, and hepatocyte growth factor (HGF), which have conclusively been shown to be the most motogenic for KCs. Critical Issues: The cellular and molecular heterogeneity of wounded tissue makes establishing direct relationships between specific growth factors and KC migration difficult in situ. The absence of this complexity in simplified in vitro experimental models of migration makes the clinical relevance of the results obtained from these in vitro studies ambiguous. Future Directions: Deciphering the relationship between growth factors and KC migration is critical for understanding the process of wound healing in normal and disease states. Insights into the basic science of the effects of growth factors on KC migration will hopefully lead to the development of new therapies to treat acute and chronic wounds.
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Affiliation(s)
- Mark A. Seeger
- Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Amy S. Paller
- Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
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Arai KY, Fujioka A, Okamura R, Nishiyama T. Stimulatory effect of fibroblast-derived prostaglandin E₂ on keratinocyte stratification in the skin equivalent. Wound Repair Regen 2015; 22:701-11. [PMID: 25224163 DOI: 10.1111/wrr.12228] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 09/04/2014] [Indexed: 02/03/2023]
Abstract
Epidermal-dermal interaction plays important roles in physiological events such as wound healing. In this study, we examined a double paracrine mechanism between keratinocytes and fibroblasts through interleukin-1 (IL-1) and an IL-1-induced inflammatory mediator prostaglandin E₂ (PGE₂) using the skin equivalent. The epidermal layer of the skin equivalent expressed high levels of IL-1α mRNA (IL1A mRNA) and relatively low levels of IL-1β mRNA (IL1B mRNA). IL1A mRNA was not detected in fibroblasts. Fibroblasts also expressed low but not negligible levels of IL1B mRNA only in the presence of keratinocytes. Expression of prostaglandin-endoperoxide synthase 2 mRNA (PTGS2 mRNA) and production of PGE₂ in three-dimensionally cultured fibroblasts were noticeably stimulated by co-culture with keratinocytes, whereas PTGS2 mRNA expression in the epidermal layer was very low. In addition, hydroxyprostaglandin dehydrogenase 15-(NAD) mRNA was highly expressed in keratinocytes but not in fibroblasts, and exogenous IL-1β stimulated PTGS2 mRNA expression in the dermal equivalent. The thickness of the epidermal layer and the number of MKI67-positive keratinocytes in the skin equivalent were decreased by treatment with indomethacin, and the decrease recovered when exogenous PGE₂ was added. These results indicate that keratinocytes stimulate their own proliferation through a double paracrine mechanism mediated by IL-1 and PGE₂.
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Affiliation(s)
- Koji Y Arai
- Scleroprotein Research Institute, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
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Reinertsen E, Skinner M, Wu B, Tawil B. Concentration of fibrin and presence of plasminogen affect proliferation, fibrinolytic activity, and morphology of human fibroblasts and keratinocytes in 3D fibrin constructs. Tissue Eng Part A 2014; 20:2860-9. [PMID: 24738616 PMCID: PMC4229906 DOI: 10.1089/ten.tea.2013.0423] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 04/16/2014] [Indexed: 11/13/2022] Open
Abstract
Fibrin is a hemostatic protein found in the clotting cascade. It is used in the operating room to stop bleeding and deliver cells and growth factors to heal wounds. However, formulations of clinically approved fibrin are optimized for hemostasis, and the extent to which biochemical and physical cues in fibrin mediate skin cell behavior is not fully understood nor utilized in the design of biomaterials. To determine if the concentration of fibrinogen and the presence of plasminogen affect cell behavior relevant to wound healing, we fabricated three-dimensional fibrin constructs made from 5, 10, or 20 mg/mL of clinical fibrin or plasminogen-depleted (PD) fibrin. We cultured dermal fibroblasts or epidermal keratinocytes in these constructs. Fibroblasts proliferated similarly in both types of fibrin, but keratinocytes proliferated more in low concentrations of clinical fibrin and less in PD fibrin. Clinical fibrin constructs with fibroblasts were less stiff and degraded faster than PD fibrin constructs with fibroblasts. Similarly, keratinocytes degraded clinical fibrin, but not PD fibrin. Fibroblast spreading varied with fibrin concentration in both types of fibrin. In conclusion, the concentration of fibrinogen and the presence of plasminogen affect fibroblast and keratinocyte proliferation, morphology, and fibrin degradation. Creating materials with heterogeneous regions of fibrin formulations and concentrations could be a novel strategy for controlling the phenotype of encapsulated fibroblasts and keratinocytes, and the subsequent biomechanical properties of the construct. However, other well-investigated aspects of wound healing remain to be utilized in the design of fibrin biomaterials, such as autocrine and paracrine signaling between fibroblasts, keratinocytes, and immune cells.
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Affiliation(s)
- Erik Reinertsen
- Department of Bioengineering, UCLA School of Engineering , Los Angeles, California
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Mainzer C, Barrichello C, Debret R, Remoué N, Sigaudo-Roussel D, Sommer P. Insulin-transferrin-selenium as an alternative to foetal serum for epidermal equivalents. Int J Cosmet Sci 2014; 36:427-35. [PMID: 24847782 DOI: 10.1111/ics.12141] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 04/26/2014] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Organotypic skin models are powerful tools for research in development, ageing and diseases. They have become more and more complex with the use of multiple cell types. This requires a culture medium adapted to optimize the development of such in vitro skin. Foetal bovine serum (FBS) is the most complete supplement in existence at the moment, providing at once growth factors, vitamins, hormones and other circulating compounds. However, this cocktail suffers from batch variability and its animal origin is ethically questionable. More importantly, its biological activities may interfere with the study of certain signalling pathways. Here, we present a strategy for constructing an epidermal equivalent using a defined culture medium without serum. METHODS An epidermal equivalent was constructed with primary human keratinocytes cultured using an insulin-transferrin-selenium (ITS) medium. Determination of steady-state gene expression levels and the immunohistological characterization of keratinocyte markers were performed to compare the ITS medium condition with a reference model, where keratinocytes were co-cultured with fibroblasts in the presence of FBS. RESULTS The data show that the ITS medium promoted the expression of keratinocyte proliferation and differentiation markers at the protein and transcript levels in a similar way to that of the reference model. CONCLUSION We show that culture using the ITS medium appears as a viable replacement for FBS in the construction of epidermal equivalents, opening the way to signal transduction studies.
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Affiliation(s)
- C Mainzer
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, CNRS, UMR5305, Université Lyon 1, 7 passage du Vercors, 69367, Lyon, France
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Cerrato S, Ramió-Lluch L, Brazís P, Rabanal RM, Fondevila D, Puigdemont A. Development and characterization of an equine skin-equivalent model. Vet Dermatol 2014; 25:475-e77. [PMID: 25041278 DOI: 10.1111/vde.12134] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2014] [Indexed: 01/12/2023]
Abstract
BACKGROUND There is increasing interest in the biological and pathological study of equine skin owing to the high prevalence of cutaneous diseases in horses. However, knowledge of equine skin cell biology and cultures is limited by the low number of in vitro studies in the literature. HYPOTHESIS/OBJECTIVES The objective of the study was to develop and characterize an in vitro equine skin equivalent. METHODS Cultures of pure equine keratinocytes and dermal fibroblasts were obtained by enzymatic digestion of skin biopsies. Fibroblasts were embedded into type I collagen matrices to obtain dermal scaffolds, the surface of which was seeded with keratinocytes. The three-dimensional cultures were exposed to the air-liquid interface to enable epidermal stratification. RESULTS After 14 days in air-exposed conditions, histological analysis showed that keratinocytes underwent differentiation into a multilayered epidermis. Immunohistochemical studies revealed the expression of epidermal cytokeratin in keratinocytes, whereas vimentin was expressed in dermal fibroblasts, as expected in equine skin. Immunostaining of Ki67 showed proliferative keratinocytes in the stratum basale. A continuous basement membrane at the dermo-epidermal junction was also detected immunohistochemically through the expression of its major components (type IV collagen and laminin 5). Ultrastructural analysis by electron microscopy showed desmosomes located among keratinocytes in all layers and hemidesmosomes among the basal keratinocytes and lamina densa. CONCLUSIONS AND CLINICAL IMPORTANCE This study reports, for the first time, the development of an in vitro equine skin-equivalent model that resembles equine skin morphologically, immunohistochemically and ultrastructurally.
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Affiliation(s)
- Santiago Cerrato
- UNIVET, Edifici Astrolabio, Avinguda Cerdanyola 92, 08172, Sant Cugat del Vallès, Barcelona, Spain
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Efficient Keratinocyte Differentiation Strictly Depends on JNK-Induced Soluble Factors in Fibroblasts. J Invest Dermatol 2014; 134:1332-1341. [DOI: 10.1038/jid.2013.535] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 11/14/2013] [Accepted: 11/16/2013] [Indexed: 12/21/2022]
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50
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Skin Fragility and Impaired Desmosomal Adhesion in Mice Lacking All Keratins. J Invest Dermatol 2014; 134:1012-1022. [DOI: 10.1038/jid.2013.416] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 08/27/2013] [Accepted: 09/12/2013] [Indexed: 12/22/2022]
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