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Zhang M, Chen H, Qian H, Wang C. Characterization of the skin keloid microenvironment. Cell Commun Signal 2023; 21:207. [PMID: 37587491 PMCID: PMC10428592 DOI: 10.1186/s12964-023-01214-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 07/02/2023] [Indexed: 08/18/2023] Open
Abstract
Keloids are a fibroproliferative skin disorder that develops in people of all ages. Keloids exhibit some cancer-like behaviors, with similar genetic and epigenetic modifications in the keloid microenvironment. The keloid microenvironment is composed of keratinocytes, fibroblasts, myofibroblasts, vascular endothelial cells, immune cells, stem cells and collagen fibers. Recent advances in the study of keloids have led to novel insights into cellular communication among components of the keloid microenvironment as well as potential therapeutic targets for treating keloids. In this review, we summarized the nature of genetic and epigenetic regulation in keloid-derived fibroblasts, epithelial-to-mesenchymal transition of keratinocytes, immune cell infiltration into keloids, the differentiation of keloid-derived stem cells, endothelial-to-mesenchymal transition of vascular endothelial cells, extracellular matrix synthesis and remodeling, and uncontrolled angiogenesis in keloids with the aim of identifying new targets for therapeutic benefit. Video Abstract.
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Affiliation(s)
- Mengwen Zhang
- The Second Affiliated Hospital of Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, 310009, China
| | - Hailong Chen
- The Second Affiliated Hospital of Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, 310009, China
| | - Huan Qian
- The Second Affiliated Hospital of Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, 310009, China
| | - Chen Wang
- The Second Affiliated Hospital of Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, 310009, China.
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2
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Kidzeru EB, Lebeko M, Sharma JR, Nkengazong L, Adeola HA, Ndlovu H, P Khumalo N, Bayat A. Immune cells and associated molecular markers in dermal fibrosis with focus on raised cutaneous scars. Exp Dermatol 2023; 32:570-587. [PMID: 36562321 PMCID: PMC10947010 DOI: 10.1111/exd.14734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/04/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Raised dermal scars including hypertrophic, and keloid scars as well as scalp-associated fibrosing Folliculitis Keloidalis Nuchae (FKN) are a group of fibrotic raised dermal lesions that mostly occur following cutaneous injury. They are characterized by increased extracellular matrix (ECM) deposition, primarily excessive collagen type 1 production by hyperproliferative fibroblasts. The extent of ECM deposition is thought to be proportional to the severity of local skin inflammation leading to excessive fibrosis of the dermis. Due to a lack of suitable study models, therapy for raised dermal scars remains ill-defined. Immune cells and their associated markers have been strongly associated with dermal fibrosis. Therefore, modulation of the immune system and use of anti-inflammatory cytokines are of potential interest in the management of dermal fibrosis. In this review, we will discuss the importance of immune factors in the pathogenesis of raised dermal scarring. The aim here is to provide an up-to-date comprehensive review of the literature, from PubMed, Scopus, and other relevant search engines in order to describe the known immunological factors associated with raised dermal scarring. The importance of immune cells including mast cells, macrophages, lymphocytes, and relevant molecules such as cytokines, chemokines, and growth factors, antibodies, transcription factors, and other immune-associated molecules as well as tissue lymphoid aggregates identified within raised dermal scars will be presented. A growing body of evidence points to a shift from proinflammatory Th1 response to regulatory/anti-inflammatory Th2 response being associated with the development of fibrogenesis in raised dermal scarring. In summary, a better understanding of immune cells and associated molecular markers in dermal fibrosis will likely enable future development of potential immune-modulated therapeutic, diagnostic, and theranostic targets in raised dermal scarring.
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Affiliation(s)
- Elvis Banboye Kidzeru
- Wound Healing And Keloid Scar Unit, Medical Research Council (South Africa), Hair and Skin Research Laboratory, Division of Dermatology, Department of MedicineUniversity of Cape TownCape TownSouth Africa
- Microbiology, Infectious Diseases, and Immunology Laboratory (LAMMII)Centre for Research on Health and Priority Pathologies (CRSPP)Institute of Medical Research and Medicinal Plant Studies (IMPM), Ministry of Scientific Research and InnovationYaoundéCameroon
| | - Maribanyana Lebeko
- Wound Healing And Keloid Scar Unit, Medical Research Council (South Africa), Hair and Skin Research Laboratory, Division of Dermatology, Department of MedicineUniversity of Cape TownCape TownSouth Africa
- Present address:
Cape Biologix Technologies (PTY, LTD)Cape TownSouth Africa
| | - Jyoti Rajan Sharma
- Wound Healing And Keloid Scar Unit, Medical Research Council (South Africa), Hair and Skin Research Laboratory, Division of Dermatology, Department of MedicineUniversity of Cape TownCape TownSouth Africa
- Biomedical Research and Innovation Platform, South African Medical Research Council, Francie van Zijl Drive, Parow ValleyCape TownSouth Africa
- Present address:
Biomedical Research and Innovation Platform, South African Medical Research Council, Francie van Zijl Drive, Parow ValleyCape TownSouth Africa
| | - Lucia Nkengazong
- Microbiology, Infectious Diseases, and Immunology Laboratory (LAMMII)Centre for Research on Health and Priority Pathologies (CRSPP)Institute of Medical Research and Medicinal Plant Studies (IMPM), Ministry of Scientific Research and InnovationYaoundéCameroon
| | - Henry Ademola Adeola
- Wound Healing And Keloid Scar Unit, Medical Research Council (South Africa), Hair and Skin Research Laboratory, Division of Dermatology, Department of MedicineUniversity of Cape TownCape TownSouth Africa
| | - Hlumani Ndlovu
- Department of Integrative Biomedical SciencesUniversity of Cape TownCape TownSouth Africa
| | - Nonhlanhla P Khumalo
- Wound Healing And Keloid Scar Unit, Medical Research Council (South Africa), Hair and Skin Research Laboratory, Division of Dermatology, Department of MedicineUniversity of Cape TownCape TownSouth Africa
| | - Ardeshir Bayat
- Wound Healing And Keloid Scar Unit, Medical Research Council (South Africa), Hair and Skin Research Laboratory, Division of Dermatology, Department of MedicineUniversity of Cape TownCape TownSouth Africa
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Xie J, Cao Y, Chen L, Wang M. Response: Commentary: Single-Cell Sequencing Analysis and Weighted CoExpression Network Analysis Based on Public Databases Identified That TNC Is a Novel Biomarker for Keloid. Front Immunol 2022; 13:923283. [PMID: 35837392 PMCID: PMC9273885 DOI: 10.3389/fimmu.2022.923283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 06/02/2022] [Indexed: 11/25/2022] Open
Affiliation(s)
- Jiaheng Xie
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
| | - Yuan Cao
- Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Liang Chen
- Department of General Surgery, Fuyang Hospital Affiliated to Anhui Medical University, Fuyang, China
| | - Ming Wang
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
- *Correspondence: Ming Wang,
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Li Y, Li M, Qu C, Li Y, Tang Z, Zhou Z, Yu Z, Wang X, Xin L, Shi T. The Polygenic Map of Keloid Fibroblasts Reveals Fibrosis-Associated Gene Alterations in Inflammation and Immune Responses. Front Immunol 2022; 12:810290. [PMID: 35082796 PMCID: PMC8785650 DOI: 10.3389/fimmu.2021.810290] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 12/15/2021] [Indexed: 01/02/2023] Open
Abstract
Due to many inconsistencies in differentially expressed genes (DEGs) related to genomic expression changes during keloid formation and a lack of satisfactory prevention and treatment methods for this disease, the critical biomarkers related to inflammation and the immune response affecting keloid formation should be systematically clarified. Normal skin/keloid scar tissue-derived fibroblast genome expression data sets were obtained from the Gene Expression Omnibus (GEO) and ArrayExpress databases. Hub genes have a high degree of connectivity and gene function aggregation in the integration network. The hub DEGs were screened by gene-related protein–protein interactions (PPIs), and their biological processes and signaling pathways were annotated to identify critical biomarkers. Finally, eighty-one hub DEGs were selected for further analysis, and some noteworthy signaling pathways and genes were found to be closely related to keloid fibrosis. For example, IL17RA is involved in IL-17 signal transduction, TIMP2 and MMP14 activate extracellular matrix metalloproteinases, and TNC, ITGB2, and ITGA4 interact with cell surface integrins. Furthermore, changes in local immune cell activity in keloid tissue were detected by DEG expression, immune cell infiltration, and mass CyTOF analyses. The results showed that CD4+ T cells, CD8+ T cells and NK cells were abnormal in keloid tissue compared with normal skin tissue. These findings not only support the key roles of fibrosis-related pathways, immune cells and critical genes in the pathogenesis of keloids but also expand our understanding of targets that may be useful for the treatment of fibrotic diseases.
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Affiliation(s)
- Yang Li
- Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Min Li
- Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Caijie Qu
- Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Yongxi Li
- Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Zhanli Tang
- Department of Dermatology, Qilu Hospital, Shandong University, Jinan, China
| | - Zhike Zhou
- Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Zengzhao Yu
- Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Xu Wang
- Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Linlin Xin
- Department of Dermatology, Shandong Provincial Qianfoshan Hospital, The First Hospital Affiliated with Shandong First Medical University, Jinan, China
| | - Tongxin Shi
- Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
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Raktoe RS, Rietveld MH, Out-Luiting JJ, Kruithof-de Julio M, van Zuijlen PPM, van Doorn R, El Ghalbzouri A. The effect of TGFβRI inhibition on fibroblast heterogeneity in hypertrophic scar 2D in vitro models. Burns 2021; 47:1563-1575. [PMID: 33558094 DOI: 10.1016/j.burns.2021.01.004] [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] [Received: 05/01/2020] [Revised: 12/24/2020] [Accepted: 01/11/2021] [Indexed: 12/19/2022]
Abstract
In burn patients, wound healing is often accompanied by hypertrophic scarring (HTS), resulting in both functional and aesthetic problems. HTSs are characterized by abundant presence of myofibroblasts (MFs) residing in the dermis. HTS development and MF persistence is primarily regulated by TGF-β signalling. A promising method to target the transforming growth factor receptor I (TGFβRI; also known as activin-like kinase 5 (ALK5)) is by making use of exon skipping through antisense oligonucleotides. In HTS the distinguishing border between the papillary dermis and the reticular dermis is completely abrogated, thus exhibiting a one layered dermis containing a heterogenous fibroblast population, consisting of papillary fibroblasts (PFs), reticular fibroblasts (RFs) and MFs. It has been proposed that PFs, as opposed to RFs, exhibit anti-fibrotic properties. Currently, it is still unclear which fibroblast subtype is most affected by exon skipping treatment. Therefore, the aim of this study was to investigate the effect of TGFβRI inhibition by exon skipping in PF, RF and HTS fibroblast monocultures. Morphological analyses revealed the presence of a PF-like population after exon skipping in the different fibroblast cultures. This observation was further confirmed by the expression of genes specific for PFs, demonstrated by qPCR analyses. Further investigations on mRNA and protein level revealed that indeed MFs and to a lesser extent RFs are targeted by exon skipping. Furthermore, collagen gel contraction analysis showed that ALK5 exon skipping reduced TGF-β- induced contraction together with decreased alpha-smooth muscle actin expression levels. In conclusion, we show for the first time that exon skipping primarily targets pro-fibrotic fibroblasts. This could be a promising step towards reduced HTS development of burn tissue.
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Affiliation(s)
- Rajiv S Raktoe
- Department of Dermatology, Leiden University Medical Centre (LUMC), Leiden, the Netherlands.
| | - Marion H Rietveld
- Department of Dermatology, Leiden University Medical Centre (LUMC), Leiden, the Netherlands
| | - Jacoba J Out-Luiting
- Department of Dermatology, Leiden University Medical Centre (LUMC), Leiden, the Netherlands
| | - Marianna Kruithof-de Julio
- Department of Urology, LUMC, Leiden, the Netherlands; Department of Urology, University of Bern, Bern, Switzerland
| | - Paul P M van Zuijlen
- Amsterdam UMC Location VUmc, Department of Plastic, Reconstructive and Hand Surgery, Amsterdam Movement Sciences, Amsterdam, the Netherlands; Burn Center and Department of Plastic and Reconstructive Surgery, Red Cross Hospital, Beverwijk, the Netherlands
| | - Remco van Doorn
- Department of Dermatology, Leiden University Medical Centre (LUMC), Leiden, the Netherlands
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Zouboulis CC, Zouridaki E. Cryosurgery as a Single Agent and in Combination with Intralesional Corticosteroids Is Effective on Young, Small Keloids and Induces Characteristic Histological and Immunohistological Changes: A Prospective Randomized Trial. Dermatology 2020; 237:396-406. [PMID: 33279888 DOI: 10.1159/000511624] [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] [Received: 07/24/2020] [Accepted: 09/16/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND As the pathogenesis of keloids is poorly understood, there is no sound biological basis of keloid management. Few controlled therapeutic studies have been published, and recurrences are a major reason for treatment failure. OBJECTIVE To detect efficacy and safety of cryosurgery regimens on keloids and the occurring biological changes caused by the treatment. METHODS This prospective randomized study compared efficacy and tolerability as well as histological/immunohistochemical effects of liquid nitrogen contact cryosurgery as a single regimen (group A) and combined with intralesional corticosteroids (group B) on young (<2 years old), small (≤10 cm2) keloids in 40 patients (2-sided effect, α-error 1%, power 95%). RESULTS Marked flattening of the lesions was achieved by both regimens. Median lesional volumes decreased from 106 to 7 mm3 in group A (p = 0.001) and from 138 to 6 mm3 in group B (p < 0.0001; ns, between groups). Good to excellent responses were registered in 83.3 and 90% of patients in groups A and B, respectively, by evaluating the lesional volume, in 80 and 95% of patients by the physician's evaluation and in 95% of patients in either group by the patient's assessment. Follow-up of 6-36 months revealed no further significant changes. Cryosurgery was generally well tolerated, with minor pain during treatment not requiring (27.5%) or requiring local anaesthesia (5%) - but not analgesics -, and hypopigmentation (25%). Histological examination showed increased vessel number and lumen dilatation after treatment in group B and reduction of rete ridge length in both groups with more prominent changes in group A. Tenascin C staining demarcated keloids from normal skin before therapy, while after therapy the entire treated tissue was labelled. Interferon-γ expression was significantly decreased after therapy both regarding positively stained cells and intensity in both groups. CONCLUSION Cryosurgery without and with intralesional corticosteroids is effective and safe on young, small keloids not only as a destructive physical procedure, but also by inducing biochemical and immunological scar rejuvenation.
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Affiliation(s)
- Christos C Zouboulis
- Departments of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center, Brandenburg Medical School Theodor Fontane and Faculty of Health Sciences Brandenburg, Dessau, Germany,
| | - Eftychia Zouridaki
- Department of Dermatology, Andreas Sygros Hospital, National and Kapodistrian University of Athens, Athens, Greece
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Limandjaja GC, Niessen FB, Scheper RJ, Gibbs S. The Keloid Disorder: Heterogeneity, Histopathology, Mechanisms and Models. Front Cell Dev Biol 2020; 8:360. [PMID: 32528951 PMCID: PMC7264387 DOI: 10.3389/fcell.2020.00360] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 04/22/2020] [Indexed: 12/22/2022] Open
Abstract
Keloids constitute an abnormal fibroproliferative wound healing response in which raised scar tissue grows excessively and invasively beyond the original wound borders. This review provides a comprehensive overview of several important themes in keloid research: namely keloid histopathology, heterogeneity, pathogenesis, and model systems. Although keloidal collagen versus nodules and α-SMA-immunoreactivity have been considered pathognomonic for keloids versus hypertrophic scars, conflicting results have been reported which will be discussed together with other histopathological keloid characteristics. Importantly, histopathological keloid abnormalities are also present in the keloid epidermis. Heterogeneity between and within keloids exists which is often not considered when interpreting results and may explain discrepancies between studies. At least two distinct keloid phenotypes exist, the superficial-spreading/flat keloids and the bulging/raised keloids. Within keloids, the periphery is often seen as the actively growing margin compared to the more quiescent center, although the opposite has also been reported. Interestingly, the normal skin directly surrounding keloids also shows partial keloid characteristics. Keloids are most likely to occur after an inciting stimulus such as (minor and disproportionate) dermal injury or an inflammatory process (environmental factors) at a keloid-prone anatomical site (topological factors) in a genetically predisposed individual (patient-related factors). The specific cellular abnormalities these various patient, topological and environmental factors generate to ultimately result in keloid scar formation are discussed. Existing keloid models can largely be divided into in vivo and in vitro systems including a number of subdivisions: human/animal, explant/culture, homotypic/heterotypic culture, direct/indirect co-culture, and 3D/monolayer culture. As skin physiology, immunology and wound healing is markedly different in animals and since keloids are exclusive to humans, there is a need for relevant human in vitro models. Of these, the direct co-culture systems that generate full thickness keloid equivalents appear the most promising and will be key to further advance keloid research on its pathogenesis and thereby ultimately advance keloid treatment. Finally, the recent change in keloid nomenclature will be discussed, which has moved away from identifying keloids solely as abnormal scars with a purely cosmetic association toward understanding keloids for the fibroproliferative disorder that they are.
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Affiliation(s)
- Grace C Limandjaja
- Department of Molecular Cell Biology and Immunology, Amsterdam University Medical Center (location VUmc), Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Frank B Niessen
- Department of Plastic Surgery, Amsterdam University Medical Center (location VUmc), Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Rik J Scheper
- Department of Pathology, Amsterdam University Medical Center (location VUmc), Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Susan Gibbs
- Department of Molecular Cell Biology and Immunology, Amsterdam University Medical Center (location VUmc), Vrije Universiteit Amsterdam, Amsterdam, Netherlands.,Department of Oral Cell Biology, Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, Netherlands
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8
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Huang Y, Kyriakides TR. The role of extracellular matrix in the pathophysiology of diabetic wounds. Matrix Biol Plus 2020; 6-7:100037. [PMID: 33543031 PMCID: PMC7852307 DOI: 10.1016/j.mbplus.2020.100037] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/29/2022] Open
Abstract
Impaired healing leading to the formation of ulcerated wounds is a critical concern in patients with diabetes. Abnormalities in extracellular matrix (ECM) production and remodeling contribute to tissue dysfunction and delayed healing. Specifically, diabetes-induced changes in the expression and/or activity of structural proteins, ECM-modifying enzymes, proteoglycans, and matricellular proteins have been reported. In this review, we provide a summary of the key ECM molecules and associated changes in skin and diabetic wounds. Such information should allow for new insights in the understanding of impaired wound healing and lead to the development of ECM-based therapeutic strategies.
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Affiliation(s)
- Yaqing Huang
- Vascular Biology and Therapeutics Program, Yale University, New Haven, CT 06519, USA.,Department of Pathology, Yale University, New Haven, CT 06519, USA
| | - Themis R Kyriakides
- Vascular Biology and Therapeutics Program, Yale University, New Haven, CT 06519, USA.,Department of Pathology, Yale University, New Haven, CT 06519, USA.,Department of Biomedical Engineering, Yale University, New Haven, CT 06519, USA
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Abstract
Background Keloids are defined as a benign dermal fibroproliferative disorder with no malignant potential. They tend to occur following trivial trauma or any form of trauma in genetically predisposed individuals. Keloids are known to grow beyond the margins of the wound and are common in certain body parts. The pathophysiology of keloid remains unclear, and fibroblasts have been presumed to be the main cells involved in keloid formation. Understanding the mechanism(s) of keloid formation could be critical in the identification of novel therapeutic regimen for the treatment of the keloids. Objective To review the pertinent literature and provide updated information on keloid pathophysiology. Data Source A Medline PubMed literature search was performed for relevant publications. Results A total of 66 publications were retrieved, with relevant publications on the etiology and pathogenesis as well as experimental studies on keloids. All articles were critically analyzed, and all the findings were edited and summarized. Conclusion There is still no consensus as on what is the main driving cell to keloid formation. One may, however, hypothesize that keloid formation could be a result of an abnormal response to tissue injury, hence resulting in an exaggerated inflammatory state characterized by entry of excessive inflammatory cells into the wound, including macrophages, lymphocytes, and mast cells. These cells seem to release cytokines including transforming growth factor β1 that stimulate fibroblasts to synthesize excess collagen, which is a hallmark of keloid disease.
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Affiliation(s)
- Ferdinand W Nangole
- Department of Surgery, College of Health Sciences, University of Nairobi, Po Box 2212 00202, Nairobi, Kenya
| | - George W Agak
- Division of Dermatology, David Geffen School of Medicine at UCLA, Los Angeles, California, 90095 USA
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Galectin-1 and Galectin-3 and Their Potential Binding Partners in the Dermal Thickening of Keloid Tissues. Am J Dermatopathol 2019; 41:193-204. [PMID: 30801341 DOI: 10.1097/dad.0000000000001284] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Keloids are defined histopathologically as an inflammatory disorder characterized by exhibiting numerous fibroblasts, abnormal vascularization, increased number of proinflammatory immune cells as well as uncontrolled cell proliferation, and exacerbated and disorganized deposition of extracellular matrix (ECM) molecules. Importantly, many of these ECM molecules display N- and O-linked glycan residues and are considered as potential targets for galectin-1 (Gal-1) and galectin-3 (Gal-3). Nevertheless, the presence and localization of Gal-1 and Gal-3 as well as the interactions with some of their binding partners in keloid tissues have not been considered. Here, we show that in the dermal thickening of keloids, versican, syndecan-1, fibronectin, thrombospondin-1, tenascin C, CD44, integrin β1, and N-cadherin were immunolocalized in the elongated fibroblasts that were close to the immune cell infiltrate, attached to collagen bundles, and around the microvasculature and in some immune cells. We also show that Gal-1 and Gal-3 were present in the cytoplasm and along the cell membrane of some fibroblasts and immune and endothelial cells of the dermal thickening. We suggest that Gal-1 and Gal-3, in concert with some of the ECM molecules produced by fibroblasts and by immune cells, counteract the inflammatory response in keloids. We also proposed that Gal-1 and Gal-3 through their binding partners may form a supramolecular structure at the cell surface of fibroblasts, immune cells, endothelial cells, and in the extracellular space that might influence the fibroblast morphology, adhesion, proliferation, migration, and survival as well as the inflammatory responses.
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Eckhardt A, Novotny T, Doubkova M, Hronkova L, Vajner L, Pataridis S, Hadraba D, Kulhava L, Plencner M, Knitlova J, Liskova J, Uhlik J, Zaloudikova M, Vondrasek D, Miksik I, Ostadal M. Novel contribution to clubfoot pathogenesis: The possible role of extracellular matrix proteins. J Orthop Res 2019; 37:769-778. [PMID: 30615219 DOI: 10.1002/jor.24211] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 12/11/2018] [Indexed: 02/04/2023]
Abstract
Idiopathic pes equinovarus (clubfoot) is a congenital deformity of the feet and lower legs. Clubfoot belongs to a group of fibro-proliferative disorders but its origin remains unknown. Our study aimed to achieve the first complex proteomic comparison of clubfoot contracted tissue of the foot (medial side; n = 16), with non-contracted tissue (lateral side; n = 13). We used label-free mass spectrometry quantification and immunohistochemistry. Seven proteins were observed to be significantly upregulated in the medial side (asporin, collagen type III, V, and VI, versican, tenascin-C, and transforming growth factor beta induced protein) and four in the lateral side (collagen types XII and XIV, fibromodulin, and cartilage intermediate layer protein 2) of the clubfoot. Comparison of control samples from cadavers brought only two different protein concentrations (collagen types I and VI). We also revealed pathological calcification and intracellular positivity of transforming growth factor beta only in the contracted tissue of clubfoot. Most of the 11 differently expressed proteins are strongly related to the extracellular matrix architecture and we assume that they may play specific roles in the pathogenesis of this deformity. These proteins seem to be promising targets for future investigations and treatment of this disease. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res.
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Affiliation(s)
- Adam Eckhardt
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic
| | - Tomas Novotny
- Second Faculty of Medicine, Department of Histology and Embryology, Charles University, Prague, Czech Republic.,Department of Orthopedics, Masaryk Hospital, Usti nad Labem, Czech Republic
| | - Martina Doubkova
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic.,Second Faculty of Medicine, Department of Histology and Embryology, Charles University, Prague, Czech Republic
| | - Lucia Hronkova
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic.,University of Pardubice, Pardubice, Czech Republic
| | - Ludek Vajner
- Second Faculty of Medicine, Department of Histology and Embryology, Charles University, Prague, Czech Republic
| | - Statis Pataridis
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic
| | - Daniel Hadraba
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic.,Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium.,Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Lucie Kulhava
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic.,Faculty of Science, Department of Analytical Chemistry, Charles University, Prague, Czech Republic
| | - Martin Plencner
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic
| | - Jarmila Knitlova
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic
| | - Jana Liskova
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic
| | - Jiri Uhlik
- Second Faculty of Medicine, Department of Histology and Embryology, Charles University, Prague, Czech Republic
| | - Marie Zaloudikova
- Second Faculty of Medicine, Department of Physiology, Charles University, Prague, Czech Republic
| | - David Vondrasek
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic.,Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Ivan Miksik
- Institute of Physiology of the Czech Academy of Sciences, v.v.i Videnska 1083, Prague, Czech Republic
| | - Martin Ostadal
- First Faculty of Medicine, Department of Orthopaedics, University Hospital Bulovka, Charles University, Prague, Czech Republic
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Zhang L, Qin H, Wu Z, Chen W, Zhang G. Gene expression profiling analysis: the effect of hydrocortisone on keloid fibroblasts by bioinformatics. J DERMATOL TREAT 2018; 30:200-205. [PMID: 29863417 DOI: 10.1080/09546634.2018.1484559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
BACKGROUND We aimed to explore potential molecular basis of keloid formation and response mechanism of keloid to hydrocortisone (HC). METHODS Transcriptional profile of GSE7890 which contained five normal scars with no HC treatment (NNHC), four normal scars treated with HC (NHC), five keloids with no HC treatment (KNHC), and five keloids treated with HC (KHC) samples was downloaded to identify differentially expressed genes (DEGs). Based on DEGs, hierarchical cluster analysis and pathway enrichment analysis were performed. Then, identification of characteristic pathway was performed, followed by calculation of pathway deviation score. RESULTS Compared to NNHC group, total 1603 DEGs in NHC group, 895 DEGs in KHC group, and 832 DEGs in KNHC group were identified. Hierarchical cluster analysis revealed these four groups could be well distinguished. Total three pathways included cytokine-cytokine receptor interactions were significantly different between KNHC and NNHC groups. Besides, MAPK signaling pathway, endocytosis, and apoptosis were selected between KHC and KNHC groups. Genes of vascular endothelial growth factor C (VEGFC), tenascin C (TNC), and jun proto-oncogene (JUN) were selected as important DEGs in KHC, KNHC, and NHC groups, respectively. CONCLUSIONS VEGF and TNC were, respectively, involved in KHC and KNHC in the mechanism of focal adhesion. JUN might be a potential molecular marker related to normal scar.
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Affiliation(s)
- Lianbo Zhang
- a Department of Plastic Surgery , China-Japan Union Hospital of Jilin University , Changchun , Jilin , China
| | - Haiyan Qin
- a Department of Plastic Surgery , China-Japan Union Hospital of Jilin University , Changchun , Jilin , China
| | - Zhuoxia Wu
- a Department of Plastic Surgery , China-Japan Union Hospital of Jilin University , Changchun , Jilin , China
| | - Wanying Chen
- a Department of Plastic Surgery , China-Japan Union Hospital of Jilin University , Changchun , Jilin , China
| | - Guang Zhang
- b Department of Thyroid Surgery , China-Japan Union Hospital of Jilin University , Changchun , Jilin , China
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13
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Piperigkou Z, Götte M, Theocharis AD, Karamanos NK. Insights into the key roles of epigenetics in matrix macromolecules-associated wound healing. Adv Drug Deliv Rev 2018; 129:16-36. [PMID: 29079535 DOI: 10.1016/j.addr.2017.10.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/14/2017] [Accepted: 10/20/2017] [Indexed: 02/08/2023]
Abstract
Extracellular matrix (ECM) is a dynamic network of macromolecules, playing a regulatory role in cell functions, tissue regeneration and remodeling. Wound healing is a tissue repair process necessary for the maintenance of the functionality of tissues and organs. This highly orchestrated process is divided into four temporally overlapping phases, including hemostasis, inflammation, proliferation and tissue remodeling. The dynamic interplay between ECM and resident cells exerts its critical role in many aspects of wound healing, including cell proliferation, migration, differentiation, survival, matrix degradation and biosynthesis. Several epigenetic regulatory factors, such as the endogenous non-coding microRNAs (miRNAs), are the drivers of the wound healing response. microRNAs have pivotal roles in regulating ECM composition during wound healing and dermal regeneration. Their expression is associated with the distinct phases of wound healing and they serve as target biomarkers and targets for systematic regulation of wound repair. In this article we critically present the importance of epigenetics with particular emphasis on miRNAs regulating ECM components (i.e. glycoproteins, proteoglycans and matrix proteases) that are key players in wound healing. The clinical relevance of miRNA targeting as well as the delivery strategies designed for clinical applications are also presented and discussed.
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14
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Rousselle P, Montmasson M, Garnier C. Extracellular matrix contribution to skin wound re-epithelialization. Matrix Biol 2018; 75-76:12-26. [PMID: 29330022 DOI: 10.1016/j.matbio.2018.01.002] [Citation(s) in RCA: 156] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 12/04/2017] [Accepted: 01/01/2018] [Indexed: 12/11/2022]
Abstract
The ability of skin to act as a barrier is primarily determined by cells that maintain the continuity and integrity of skin and restore it after injury. Cutaneous wound healing in adult mammals is a complex multi-step process that involves overlapping stages of blood clot formation, inflammation, re-epithelialization, granulation tissue formation, neovascularization, and remodeling. Under favorable conditions, epidermal regeneration begins within hours after injury and takes several days until the epithelial surface is intact due to reorganization of the basement membrane. Regeneration relies on numerous signaling cues and on multiple cellular processes that take place both within the epidermis and in other participating tissues. A variety of modulators are involved, including growth factors, cytokines, matrix metalloproteinases, cellular receptors, and extracellular matrix components. Here we focus on the involvement of the extracellular matrix proteins that impact epidermal regeneration during wound healing.
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Affiliation(s)
- Patricia Rousselle
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS - Université Lyon 1, Institut de Biologie et Chimie des Protéines, SFR BioSciences Gerland-Lyon Sud, 7 passage du Vercors, F-69367, France.
| | - Marine Montmasson
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS - Université Lyon 1, Institut de Biologie et Chimie des Protéines, SFR BioSciences Gerland-Lyon Sud, 7 passage du Vercors, F-69367, France
| | - Cécile Garnier
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS - Université Lyon 1, Institut de Biologie et Chimie des Protéines, SFR BioSciences Gerland-Lyon Sud, 7 passage du Vercors, F-69367, France
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15
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Kobayashi Y, Yoshida S, Zhou Y, Nakama T, Ishikawa K, Kubo Y, Arima M, Nakao S, Hisatomi T, Ikeda Y, Matsuda A, Sonoda KH, Ishibashi T. Tenascin-C secreted by transdifferentiated retinal pigment epithelial cells promotes choroidal neovascularization via integrin αV. J Transl Med 2016; 96:1178-1188. [PMID: 27668890 DOI: 10.1038/labinvest.2016.99] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 08/16/2016] [Accepted: 08/18/2016] [Indexed: 02/01/2023] Open
Abstract
Tenascin-C is expressed in choroidal neovascular (CNV) membranes in eyes with age-related macular degeneration (AMD). However, its role in the pathogenesis of CNV remains to be elucidated. Here we investigated the role of tenascin-C in CNV formation. In immunofluorescence analyses, tenascin-C co-stained with α-SMA, pan-cytokeratin, CD31, CD34, and integrin αV in the CNV membranes of patients with AMD and a mouse model of laser-induced CNV. A marked increase in the expression of tenascin-C mRNA and protein was observed 3 days after laser photocoagulation in the mouse CNV model. Tenascin-C was also shown to promote proliferation and inhibit adhesion of human retinal pigment epithelial (hRPE) cells in vitro. Moreover, tenascin-C promoted proliferation, adhesion, migration, and tube formation in human microvascular endothelial cells (HMVECs); these functions were, however, blocked by cilengitide, an integrin αV inhibitor. Exposure to TGF-β2 increased tenascin-C expression in hRPE cells. Conditioned media harvested from TGF-β2-treated hRPE cell cultures enhanced HMVEC proliferation and tube formation, which were inhibited by pretreatment with tenascin-C siRNA. The CNV volume was significantly reduced in tenascin-C knockout mice and tenascin-C siRNA-injected mice. These findings suggest that tenascin-C is secreted by transdifferentiated RPE cells and promotes the development of CNV via integrin αV in a paracrine manner. Therefore, tenascin-C could be a potential therapeutic target for the inhibition of CNV development associated with AMD.
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Affiliation(s)
- Yoshiyuki Kobayashi
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Shigeo Yoshida
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Yedi Zhou
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Takahito Nakama
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Keijiro Ishikawa
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Yuki Kubo
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Mitsuru Arima
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Shintaro Nakao
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Toshio Hisatomi
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Yasuhiro Ikeda
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Akira Matsuda
- Department of Ophthalmology, Juntendo University, Tokyo, Japan
| | - Koh-Hei Sonoda
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Tatsuro Ishibashi
- Department of Ophthalmology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
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Bhattacharyya S, Wang W, Morales-Nebreda L, Feng G, Wu M, Zhou X, Lafyatis R, Lee J, Hinchcliff M, Feghali-Bostwick C, Lakota K, Budinger GRS, Raparia K, Tamaki Z, Varga J. Tenascin-C drives persistence of organ fibrosis. Nat Commun 2016; 7:11703. [PMID: 27256716 PMCID: PMC4895803 DOI: 10.1038/ncomms11703] [Citation(s) in RCA: 190] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 04/20/2016] [Indexed: 02/07/2023] Open
Abstract
The factors responsible for maintaining persistent organ fibrosis in systemic sclerosis (SSc) are not known but emerging evidence implicates toll-like receptors (TLRs) in the pathogenesis of SSc. Here we show the expression, mechanism of action and pathogenic role of endogenous TLR activators in skin from patients with SSc, skin fibroblasts, and in mouse models of organ fibrosis. Levels of tenascin-C are elevated in SSc skin biopsy samples, and serum and SSc fibroblasts, and in fibrotic skin tissues from mice. Exogenous tenascin-C stimulates collagen gene expression and myofibroblast transformation via TLR4 signalling. Mice lacking tenascin-C show attenuation of skin and lung fibrosis, and accelerated fibrosis resolution. These results identify tenascin-C as an endogenous danger signal that is upregulated in SSc and drives TLR4-dependent fibroblast activation, and by its persistence impedes fibrosis resolution. Disrupting this fibrosis amplification loop might be a viable strategy for the treatment of SSc.
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Affiliation(s)
- Swati Bhattacharyya
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | - Wenxia Wang
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | | | - Gang Feng
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | - Minghua Wu
- University of Texas Medical School at Houston, Houston, Texas 77030, USA
| | - Xiaodong Zhou
- University of Texas Medical School at Houston, Houston, Texas 77030, USA
| | - Robert Lafyatis
- Boston University School of Medicine, Boston, Massachusetts 02215, USA
| | - Jungwha Lee
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | - Monique Hinchcliff
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | | | - Katja Lakota
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | - G. R. Scott Budinger
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | - Kirtee Raparia
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | - Zenshiro Tamaki
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | - John Varga
- Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
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Tracy LE, Minasian RA, Caterson E. Extracellular Matrix and Dermal Fibroblast Function in the Healing Wound. Adv Wound Care (New Rochelle) 2016; 5:119-136. [PMID: 26989578 DOI: 10.1089/wound.2014.0561] [Citation(s) in RCA: 531] [Impact Index Per Article: 66.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Significance: Fibroblasts play a critical role in normal wound healing. Various extracellular matrix (ECM) components, including collagens, fibrin, fibronectin, proteoglycans, glycosaminoglycans, and matricellular proteins, can be considered potent protagonists of fibroblast survival, migration, and metabolism. Recent Advances: Advances in tissue culture, tissue engineering, and ex vivo models have made the examination and precise measurements of ECM components in wound healing possible. Likewise, the development of specific transgenic animal models has created the opportunity to characterize the role of various ECM molecules in healing wounds. In addition, the recent characterization of new ECM molecules, including matricellular proteins, dermatopontin, and FACIT collagens (Fibril-Associated Collagens with Interrupted Triple helices), further demonstrates our cursory knowledge of the ECM in coordinated wound healing. Critical Issues: The manipulation and augmentation of ECM components in the healing wound is emerging in patient care, as demonstrated by the use of acellular dermal matrices, tissue scaffolds, and wound dressings or topical products bearing ECM proteins such as collagen, hyaluronan (HA), or elastin. Once thought of as neutral structural proteins, these molecules are now known to directly influence many aspects of cellular wound healing. Future Directions: The role that ECM molecules, such as CCN2, osteopontin, and secreted protein, acidic and rich in cysteine, play in signaling homing of fibroblast progenitor cells to sites of injury invites future research as we continue investigating the heterotopic origin of certain populations of fibroblasts in a healing wound. Likewise, research into differently sized fragments of the same polymeric ECM molecule is warranted as we learn that fragments of molecules such as HA and tenascin-C can have opposing effects on dermal fibroblasts.
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Affiliation(s)
- Lauren E. Tracy
- Division of Plastic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Raquel A. Minasian
- Division of Plastic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - E.J. Caterson
- Division of Plastic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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18
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Kasprzycka M, Hammarström C, Haraldsen G. Tenascins in fibrotic disorders-from bench to bedside. Cell Adh Migr 2015; 9:83-9. [PMID: 25793575 DOI: 10.4161/19336918.2014.994901] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Although fibrosis is becoming increasingly recognized as a major cause of morbidity and mortality in chronic inflammatory diseases, available treatment strategies are limited. Tenascins constitute a family of matricellular proteins, primarily modulating interactions of cells with other matrix components and growth factors. Data obtained from tenascin C deficient mice show important roles of this molecule in several models of fibrosis. Moreover there is growing evidence that tenascin C has a strong impact on chronic inflammation, myofibroblast differentiation and recruitment. Tenascin C as well as tenascin X has furthermore been shown to affect TGF-β activation and signaling. Taken together these data suggest that these proteins might be important factors in fibrosis development and make them attractive both as biological markers and as targets for therapeutical intervention. So far most clinical research in fibrosis has been focused on tenascin C. This review aims at summarizing our up-to-date knowledge on the involvement of tenascin C in the pathogenesis of fibrotic disorders.
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19
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Zuliani-Alvarez L, Midwood KS. Fibrinogen-Related Proteins in Tissue Repair: How a Unique Domain with a Common Structure Controls Diverse Aspects of Wound Healing. Adv Wound Care (New Rochelle) 2015; 4:273-285. [PMID: 26005593 DOI: 10.1089/wound.2014.0599] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 10/14/2014] [Indexed: 12/23/2022] Open
Abstract
Significance: Fibrinogen-related proteins (FRePs) comprise an intriguing collection of extracellular molecules, each containing a conserved fibrinogen-like globe (FBG). This group includes the eponymous fibrinogen as well as the tenascin, angiopoietin, and ficolin families. Many of these proteins are upregulated during tissue repair and exhibit diverse roles during wound healing. Recent Advances: An increasing body of evidence highlights the specific expression of a number of FRePs following tissue injury and infection. Upon induction, each FReP uses its FBG domain to mediate quite distinct effects that contribute to different stages of tissue repair, such as driving coagulation, pathogen detection, inflammation, angiogenesis, and tissue remodeling. Critical Issues: Despite a high degree of homology among FRePs, each contains unique sequences that enable their diversification of function. Comparative analysis of the structure and function of FRePs and precise mapping of regions that interact with a variety of ligands has started to reveal the underlying molecular mechanisms by which these proteins play very different roles using their common domain. Future Directions: Fibrinogen has long been used in the clinic as a synthetic matrix serving as a scaffold or a delivery system to aid tissue repair. Novel therapeutic strategies are now emerging that harness the use of other FRePs to improve wound healing outcomes. As we learn more about the underlying mechanisms by which each FReP contributes to the repair response, specific blockade, or indeed potentiation, of their function offers real potential to enable regulation of distinct processes during pathological wound healing.
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Affiliation(s)
- Lorena Zuliani-Alvarez
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Kim S. Midwood
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
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20
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Abdel-Meguid AM, Weshahy AH, Sayed DS, Refaiy AE, Awad SM. Intralesional vs. contact cryosurgery in treatment of keloids: a clinical and immunohistochemical study. Int J Dermatol 2014; 54:468-75. [DOI: 10.1111/ijd.12667] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
| | - Ahmed Hany Weshahy
- Department of Dermatology and Venereology; Cairo University; Cairo Egypt
| | - Doaa S. Sayed
- Department of Dermatology and Venereology; Assiut University; Assiut Egypt
| | | | - Sara M.I. Awad
- Department of Dermatology and Venereology; Assiut University; Assiut Egypt
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21
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Steeb H, Ramsey JM, Guest PC, Stocki P, Cooper JD, Rahmoune H, Ingudomnukul E, Auyeung B, Ruta L, Baron-Cohen S, Bahn S. Serum proteomic analysis identifies sex-specific differences in lipid metabolism and inflammation profiles in adults diagnosed with Asperger syndrome. Mol Autism 2014; 5:4. [PMID: 24467795 PMCID: PMC3905921 DOI: 10.1186/2040-2392-5-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 12/31/2013] [Indexed: 01/02/2023] Open
Abstract
Background The higher prevalence of Asperger Syndrome (AS) and other autism spectrum conditions in males has been known for many years. However, recent multiplex immunoassay profiling studies have shown that males and females with AS have distinct proteomic changes in serum. Methods Here, we analysed sera from adults diagnosed with AS (males = 14, females = 16) and controls (males = 13, females = 16) not on medication at the time of sample collection, using a combination of multiplex immunoassay and shotgun label-free liquid chromatography mass spectrometry (LC-MSE). The main objective was to identify sex-specific serum protein changes associated with AS. Results Multiplex immunoassay profiling led to identification of 16 proteins that were significantly altered in AS individuals in a sex-specific manner. Three of these proteins were altered in females (ADIPO, IgA, APOA1), seven were changed in males (BMP6, CTGF, ICAM1, IL-12p70, IL-16, TF, TNF-alpha) and six were changed in both sexes but in opposite directions (CHGA, EPO, IL-3, TENA, PAP, SHBG). Shotgun LC-MSE profiling led to identification of 13 serum proteins which had significant sex-specific changes in the AS group and, of these, 12 were altered in females (APOC2, APOE, ARMC3, CLC4K, FETUB, GLCE, MRRP1, PTPA, RN149, TLE1, TRIPB, ZC3HE) and one protein was altered in males (RGPD4). The free androgen index in females with AS showed an increased ratio of 1.63 compared to controls. Conclusion Taken together, the serum multiplex immunoassay and shotgun LC-MSE profiling results indicate that adult females with AS had alterations in proteins involved mostly in lipid transport and metabolism pathways, while adult males with AS showed changes predominantly in inflammation signalling. These results provide further evidence that the search for biomarkers or novel drug targets in AS may require stratification into male and female subgroups, and could lead to the development of novel targeted treatment approaches.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Sabine Bahn
- Department of Chemical Engineering & Biotechnology, University of Cambridge, Tennis Court Road, Cambridge, UK.
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Maeda H, Wada N, Tomokiyo A, Monnouchi S, Akamine A. Prospective potency of TGF-β1 on maintenance and regeneration of periodontal tissue. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2013; 304:283-367. [PMID: 23809439 DOI: 10.1016/b978-0-12-407696-9.00006-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Periodontal ligament (PDL) tissue, central in the periodontium, plays crucial roles in sustaining tooth in the bone socket. Irreparable damages of this tissue provoke tooth loss, causing a decreased quality of life. The question arises as to how PDL tissue is maintained or how the lost PDL tissue can be regenerated. Stem cells included in PDL tissue (PDLSCs) are widely accepted to have the potential to maintain or regenerate the periodontium, but PDLSCs are very few in number. In recent studies, undifferentiated clonal human PDL cell lines were developed to elucidate the applicable potentials of PDLSCs for the periodontal regenerative medicine based on cell-based tissue engineering. In addition, it has been suggested that transforming growth factor-beta 1 is an eligible factor for the maintenance and regeneration of PDL tissue.
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Affiliation(s)
- Hidefumi Maeda
- Department of Endodontology, Kyushu University Hospital, Fukuoka, Japan.
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23
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Häkkinen L, Larjava H, Koivisto L. Granulation tissue formation and remodeling. ACTA ACUST UNITED AC 2012. [DOI: 10.1111/etp.12008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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24
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Extracellular matrix expression by equine oral and limb fibroblasts in in vitro culture. Res Vet Sci 2012; 92:213-8. [DOI: 10.1016/j.rvsc.2011.03.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 02/28/2011] [Accepted: 03/18/2011] [Indexed: 11/17/2022]
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25
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Sidgwick GP, Bayat A. Extracellular matrix molecules implicated in hypertrophic and keloid scarring. J Eur Acad Dermatol Venereol 2011; 26:141-52. [PMID: 21838832 DOI: 10.1111/j.1468-3083.2011.04200.x] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Tissue regeneration repairs the fabric of the skin to maintain homeostasis after injury. The expression and proliferation of extracellular matrix (ECM) molecules in the dermis, mediated by a range of growth factors and cytokines, is a fundamental element of wound repair. Previous work focused on how these complex molecular mechanisms relate to the formation of raised dermal scars, including keloid and hypertrophic scars, characterized by excessive deposition of ECM molecules. However, the mechanisms in the wound repair pathway which lead to the differential expression and organization of ECM molecules observed in different types of scar tissue are not fully understood. To summarize what is known about the expression and composition of ECM molecules in abnormal scarring, an extensive search of the literature was conducted, focusing on keywords connected to skin scarring, hypertrophic scars and keloid disease. The transcription and translation of collagen I and III, fibronectin, laminin, periostin and tenascin are all increased in raised dermal scar tissue. However, hyaluronic acid, dermatopontin and decorin are decreased, and the expression and localisation of fibrillin and elastin fibres in the dermis are altered compared with normal skin and scars. Recent whole genome profiling and proteomic studies have led to the identification of regulatory elements with different expression profiles in hypertrophic and keloid tissue. If the mechanisms of raised dermal scar formation are to be elucidated and effective therapeutic treatments developed, an integrated approach to research is required, focussing on the interactions between ECM molecules, regulatory elements and pathways.
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Affiliation(s)
- G P Sidgwick
- Plastic and Reconstructive Surgery Research, School of Translational Medicine, Manchester Interdisciplinary Biocentre, University of Manchester, Manchester, UK
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Wong JW, Gallant-Behm C, Wiebe C, Mak K, Hart DA, Larjava H, Häkkinen L. Wound healing in oral mucosa results in reduced scar formation as compared with skin: Evidence from the red Duroc pig model and humans. Wound Repair Regen 2009; 17:717-29. [DOI: 10.1111/j.1524-475x.2009.00531.x] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lau K, Paus R, Tiede S, Day P, Bayat A. Exploring the role of stem cells in cutaneous wound healing. Exp Dermatol 2009; 18:921-33. [PMID: 19719838 DOI: 10.1111/j.1600-0625.2009.00942.x] [Citation(s) in RCA: 183] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The skin offers a perfect model system for studying the wound healing cascade, which involves a finely tuned interplay between several cell types, pathways and processes. The dysregulation of these factors may lead to wound healing disorders resulting in chronic wounds, as well as abnormal scars such as hypertrophic and keloid scars. As the contribution of stem cells towards tissue regeneration and wound healing is increasingly appreciated, a rising number of stem cell therapies for cutaneous wounds are currently under development, encouraged by emerging preliminary findings in both animal models and human studies. However, we still lack an in-depth understanding of the underlying mechanisms through which stem cells contribute to cutaneous wound healing. The aim of this review is, therefore, to present a critical synthesis of our current understanding of the role of stem cells in normal cutaneous wound healing. In addition to summarizing wound healing principles and related key molecular and cellular players, we discuss the potential participation of different cutaneous stem cell populations in wound healing, and list corresponding stem cells markers. In summary, this review delineates current strategies, future applications, and limitations of stem cell-based or stem cell-targeted therapy in the management of acute and chronic skin wounds.
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Affiliation(s)
- Katherine Lau
- Proteomics Department, Institute of Analytical Sciences, Dortmund, Germany
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Nakasone A, Shibata S, Suzuki S, Yamashita Y, Ohyama K. Laser burn wound healing in naso-labial region of fetal and neonatal mice. Oral Dis 2007; 13:45-50. [PMID: 17241429 DOI: 10.1111/j.1601-0825.2006.01245.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To investigate the characteristics of wound healing in the mouse naso-labial region in both the fetal and neonatal stages, histological and immunohistochemical analyses were performed using a newly established laser burn wound healing system. MATERIALS AND METHODS Fetal mice at embryonic day 14 (E 14) were wounded as a model of fetal wound healing. To compare it, neonatal mice at day 5 after birth (d 5) were adopted as a model of neonatal wound healing. The healing process was examined by van Gieson staining and immunohistochemistry for fibronectin and tenascin. RESULTS Relatively large damage remained after wound healing even in fetal mice. In both types of wound healing, rapid regeneration of muscle tissues were observed. Fibronectin and tenascin immunostaining was detected not only in wound healing region, but also in the endomysium of regenerating muscle tissues. Especially, tenascin showed a restricted expression pattern. CONCLUSIONS Rapid regeneration of muscle tissues in the naso-labial region in both the fetal and neonatal mice seemed to leave relatively large damage even in the fetal wound healing. Contracted force exerted by muscle tissues may be a reason for this phenomenon. Fibronectin and tenascin were closely related to the wound healing process including muscle regeneration in this region.
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Affiliation(s)
- A Nakasone
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
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Amadeu TP, Braune AS, Porto LC, Desmoulière A, Costa AMA. Fibrillin-1 and elastin are differentially expressed in hypertrophic scars and keloids. Wound Repair Regen 2004; 12:169-74. [PMID: 15086768 DOI: 10.1111/j.1067-1927.2004.012209.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hypertrophic scars and keloids are two forms of excessive cutaneous scarring. Considering the importance of extracellular matrix elements in tissue repair, a morphological and quantitative analysis of the elastic system components (fibrillin-1 and elastin) was performed in normal skin, normal scars, hypertrophic scars, and keloids. In superficial and deep dermis, fibrillin-1 volume density was significantly higher in normal skin compared with normal scars, hypertrophic scars, and keloids. The fibrillin-1 volume density did not show differences between hypertrophic scars and keloids in superficial or deep dermis. In superficial dermis, elastin volume density was higher in normal skin compared with normal scars, hypertrophic scars, and keloids. In deep dermis, the elastin volume density was higher in keloids compared with normal skins, normal scars, and hypertrophic scars. We showed that the distribution of fibrillin-1 and elastin is disrupted in all kinds of scars analyzed, but there are two patterns: one for normal scars and another for excessive scars.
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Affiliation(s)
- Thaís P Amadeu
- Departamento de Histologia e Embriologia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
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Satish L, Babu M, Tran KT, Hebda PA, Wells A. Keloid fibroblast responsiveness to epidermal growth factor and activation of downstream intracellular signaling pathways. Wound Repair Regen 2004; 12:183-92. [PMID: 15086770 DOI: 10.1111/j.1067-1927.2004.012111.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Keloids, which overgrow the boundaries of the original injury, represent aberrations in the fundamental process of wound healing that include over-abundant cell in-migration, cell proliferation, and inflammation, as well as increased extracellular matrix synthesis and defective remodeling. To understand the key events that result in the formation of these abnormal scars would open new avenues for better understanding of excessive repair, and might provide new therapeutic options. We examined epidermal growth factor receptor (EGFR)-induced cell motility in keloid fibroblasts, as this receptor initiates cell migration during normal wound repair. We show that keloid fibroblasts respond to EGF-induced cell migration but the response is somewhat diminished compared to normal adult fibroblasts (approximately 30% reduced); the mitogenic response was similarly blunted (approximately 5% reduced). Keloid fibroblasts express near normal levels of EGFR (82%), but show a much more attenuated activation of EGFR itself and the motility-associated phospholipase C-gamma. This was reflected in part by rapid loss of EGFR upon exposure to EGF. Interestingly, while extracellular signal-regulated kinase/mitogen-activated protein kinase (ERK-MAPK) activation was relatively robust in keloid fibroblasts, the downstream triggering of the motility-associated calpain activity was blunted. This was reflected by high cell-substratum adhesiveness in the keloid fibroblasts. Thus, the blunted migratory response to EGF noted in keloid fibroblasts appears due to limited activation of two important biochemical switches for cell motility.
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Affiliation(s)
- Latha Satish
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA
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Wehrhan F, Rödel F, Grabenbauer GG, Amann K, Brückl W, Schultze-Mosgau S. Transforming growth factor beta 1 dependent regulation of Tenascin-C in radiation impaired wound healing. Radiother Oncol 2004; 72:297-303. [PMID: 15450728 DOI: 10.1016/j.radonc.2004.07.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2004] [Revised: 06/26/2004] [Accepted: 06/28/2004] [Indexed: 01/22/2023]
Abstract
BACKGROUND Following preoperative radiotherapy prior to ablative surgery of squamous epithelial cell carcinomas of the head and neck region fibrocontractive wound healing disorders occur. Tenascin-C is significantly increased in fibrotic tissue conditions and can be stimulated by the transcription factor NF kappa B p65. Previous studies showed a reduction of irradiation induced fibrosis during the wound healing process by anti-TGF beta(1)-treatment. The aim of the study was to clarify the question whether Tenascin-C expression is elevated in radiation impaired wounds and whether anti-TGF beta(1)-treatment is capable to influence Tenascin-C and NF kappa B expression. MATERIAL AND METHODS Wistar rats (male, weight 300-500 g) underwent preoperative irradiation of the head and neck region with 40 Gy, fractionated four times 10 Gy (16 animals), whereas 8 non-irradated animals served as a control. Four weeks after irradiation a free myocutaneous gracilis flap taken from the groin was transplanted to the neck. Eight animals additionally received 5 microg anti-TGF beta(1) into the graft bed by intradermal injection prior to each fraction of irradiation and on days 1-7 post-operation. On day 14 and 28 following surgery immunohistochemistry (ABC-POX method) was performed assessing the cytoplasmic NF kappa B and Tenascin-C staining in the transition area between transplant and graft bed. For quantitative considerations the labeling index (ratio: positive cells/total cells) was determined. RESULTS A significantly altered expression of Tenascin-C in the preirradiated tissue was observed following anti-TGF beta(1)-treatment. NF kappa B protein was upregulated in irradiated animals and was significantly reduced in the anti-TGF beta(1) treated group on day 28 after transplantation. CONCLUSIONS Tenascin-C expression is prolonged in irradiated animals as compared to non-irradiated tissue. Tenascin-C seems to be regulated by TGF beta(1) as the application of TGF beta(1)-neutralizing antibodies reduces Tenascin-C expression. Tenascin-C is a potentially useful marker for tissue remodeling due to its restricted distribution in adult and healthy tissue and a hallmark for developing fibrosis.
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Affiliation(s)
- Falk Wehrhan
- Department of Oral and Maxillofacial Surgery, University of Erlangen-Nuremberg, Germany
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Dalkowski A, Fimmel S, Beutler C, Zouboulis CC. Cryotherapy modifies synthetic activity and differentiation of keloidal fibroblastsin vitro. Exp Dermatol 2003; 12:673-81. [PMID: 14705809 DOI: 10.1034/j.1600-0625.2003.00015.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In order to obtain a persuasive explanation for the beneficial clinical effect of cryotherapy on keloids, we developed a reproducible model to apply freezing temperatures on cell cultures, and investigated their influence on proliferation, viability, synthetic activity and differentiation of dermal fibroblasts in vitro. Cell cultures were established from 13 untreated keloids and 10 healthy skin specimens matched for age and skin localization to the donors. No significant influence of cell freezing on the proliferation rates of both keloidal and normal fibroblasts was documented, but mechanical cell destruction with a wide variation in lethality rates (29% average lethal effect on keloidal fibroblasts and 41% on normal ones) was observed. When comparing specimens of keloidal and normal tissue derived from the same four donors, the keloidal fibroblasts were similar regarding their synthetic activity but presented enhanced tenascin-C expression compared with the normal fibroblasts. After cryotherapy, delayed collagen III increase was detected in both cell types (P = 0.03). The collagen II/collagen I ratio increased from 1.6 to 2.8 in the keloidal and only from 1.9 to 2.2 in the normal fibroblasts after subcultivation. Normal fibroblasts exhibited a significantly lasting increase in fibronectin synthesis after freezing (P = 0.03). The intensity of staining against tenascin-C was decreased in five of nine keloidal fibroblast cultures after cryotherapy (P < 0.05) but increased in four of five normal fibroblast cultures (P = 0.016), so that the intensity of tenascin-C staining after freezing became identical in both cell types. Immunoblot studies in four patients and two controls confirmed a temporary decrease of tenascin-C in keloidal but not in normal fibroblasts immediately after freezing. Significantly decreased staining with two markers of myogenic differentiation, myosin in keloidal fibroblasts (P = 0.002) and desmin (P = 0.007) in normal fibroblasts, could also be detected after treatment. In summary, with the help of a model for controlled cell freezing in vitro, cryotherapy was found to modify collagen synthesis and differentiation of keloidal fibroblasts.
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Affiliation(s)
- A Dalkowski
- Department Dermatology, University Medical Center Benjamin Franklin, The Free University of Berlin, Fabeckstrasse 60-62, 14195 Berlin, Germany
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Chiquet-Ehrismann R, Chiquet M. Tenascins: regulation and putative functions during pathological stress. J Pathol 2003; 200:488-99. [PMID: 12845616 DOI: 10.1002/path.1415] [Citation(s) in RCA: 394] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
UNLABELLED In this review, we discuss the structure and function of the extracellular matrix protein family of tenascins with emphasis on their involvement in human pathologies. The article is divided into the following sections: INTRODUCTION the tenascin family of extracellular matrix proteins; Structural roles: tenascin-X deficiency and Ehlers-Danlos syndrome; Tenascins as modulators of cell adhesion, migration, and growth; Role of tenascin-C in inflammation; Regulation of tenascins by mechanical stress: implications for wound healing and regeneration; Association of tenascin-C with cancer: antibodies as diagnostic and therapeutic tools; Conclusion and perspectives.
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Affiliation(s)
- Ruth Chiquet-Ehrismann
- Friedrich Miescher Institute, Novartis Research Foundation, Maulbeerstrasse 66, CH-4058 Basel, Switzerland.
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Chipev CC, Simon M. Phenotypic differences between dermal fibroblasts from different body sites determine their responses to tension and TGFbeta1. BMC DERMATOLOGY 2002; 2:13. [PMID: 12445328 PMCID: PMC138803 DOI: 10.1186/1471-5945-2-13] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2002] [Accepted: 11/21/2002] [Indexed: 11/10/2022]
Abstract
BACKGROUND Wounds in the nonglabrous skin of keloid-prone individuals tend to cause large disordered accumulations of collagen which extend beyond the original margins of the wound. In addition to abnormalities in keloid fibroblasts, comparison of dermal fibroblasts derived from nonwounded glabrous or nonglabrous skin revealed differences that may account for the observed location of keloids. METHODS Fibroblast apoptosis and the cellular content of alpha-smooth-muscle actin, TGFbeta1 receptorII and ED-A fibronectin were estimated by FACS analysis. The effects of TGFbeta1 and serum were examined. RESULTS In monolayer cultures non-glabrous fibroblasts were slower growing, had higher granularity and accumulated more alpha-smooth-muscle actin than fibroblasts from glabrous tissues. Keloid fibroblasts had the highest level of alpha-smooth-muscle actin in parallel with their expression level of ED-A fibronectin. TGFbeta1 positively regulated alpha-smooth-muscle actin expression in all fibroblast cultures, although its effects on apoptosis in fibroblasts from glabrous and non-glabrous tissues were found to differ. The presence of collagen I in the ECM resulted in reduction of alpha-smooth-muscle actin. A considerable percentage of the apoptotic fibroblasts in attached gels were alpha-smooth-muscle actin positive. The extent of apoptosis correlated positively with increased cell and matrix relaxation. TGFbeta1 was unable to overcome this apoptotic effect of matrix relaxation. CONCLUSION The presence of myofibroblasts and the apoptosis level can be regulated by both TGFbeta1 and by the extracellular matrix. However, reduction of tension in the matrix is the critical determinant. This predicts that the tension in the wound bed determines the type of scar at different body sites.
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Affiliation(s)
- Constantin C Chipev
- Living Skin Bank, University Hospital, Dept. Oral Biology and Pathology, Dept. of Dermatology, HSC, SUNY at Stony Brook, NY 11794-9702, USA
| | - Marcia Simon
- Living Skin Bank, University Hospital, Dept. Oral Biology and Pathology, Dept. of Dermatology, HSC, SUNY at Stony Brook, NY 11794-9702, USA
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Ghert MA, Qi WN, Erickson HP, Block JA, Scully SP. Tenascin-C expression and distribution in cultured human chondrocytes and chondrosarcoma cells. J Orthop Res 2002; 20:834-41. [PMID: 12168675 DOI: 10.1016/s0736-0266(01)00172-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Tenascin-C (TNC) is an oligomeric glycoprotein of the extracellular matrix with several distinct isoforms variably expressed during embryogenesis, tumorogenesis, angiogenesis and wound healing. In the normal human adult, TNC is found in large concentrations in articular cartilage, suggesting tissue-specific function. The purpose of this study was to determine the specific in vitro TNC splicing patterns of articular chondrocytes and a human chondrosarcoma cell line. Cells were cultured in a three-dimensional bead system and TNC splice variant expression and distribution were examined with the use of Western blotting techniques, semi-quantitative reverse-transcription polymerase chain reaction and immunohistochemistry. At both the transcriptional and post-translational levels, the chondrocytes were found to express significantly higher levels of the smaller 220 kDa isoform (P < 0.01), which was predominantly incorporated into the matrix. The splicing pattern of the malignant cells was characterized by a higher proportion of the larger 320 kDa isoform which was extruded into the media. In vivo studies are necessary to verify the expression of the large TNC isoform in chondrosarcoma and the production and integration of the smaller isoform in normal chondroid matrix. In addition, elucidation of the biologic functions of the two major TNC isoforms may lead to the development of novel diagnostic and therapeutic approaches to chondrosarcoma.
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Affiliation(s)
- Michelle A Ghert
- Division of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA
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Chin GS, Liu W, Peled Z, Lee TY, Steinbrech DS, Hsu M, Longaker MT. Differential expression of transforming growth factor-beta receptors I and II and activation of Smad 3 in keloid fibroblasts. Plast Reconstr Surg 2001; 108:423-9. [PMID: 11496185 DOI: 10.1097/00006534-200108000-00022] [Citation(s) in RCA: 147] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Keloids represent a dysregulated response to cutaneous wounding that results in an excessive deposition of extracellular matrix, especially collagen. However, the molecular mechanisms regulating this pathologic collagen deposition still remain to be elucidated. A previous study by this group demonstrated that transforming growth factor (TGF)-beta1 and -beta2 ligands were expressed at greater levels in keloid fibroblasts when compared with normal human dermal fibroblasts (NHDFs), suggesting that TGF-beta may play a fibrosis-promoting role in keloid pathogenesis.To explore the biomolecular mechanisms of TGF-beta in keloid formation, the authors first compared the expression levels of the type I and type II TGF-beta receptors in keloid fibroblasts and NHDFs. Next, they investigated the phosphorylation of Smad 3, an intracellular TGF-beta signaling molecule, in keloid fibroblasts and NHDFs. Finally, they examined the regulation of TGF-beta receptor II by TGF-beta1, TGF-beta2, and TGF-beta3 ligands. Our findings demonstrated an increased expression of TGF-beta receptors (types I and II) and increased phosphorylation of Smad 3 in keloid fibroblasts relative to NHDFs. These data support a possible role of TGF-beta and its receptors as fibrosis-inducing growth factors in keloids. In addition, all three isoforms of recombinant human TGF-beta proteins could further stimulate the expression of TGF-beta receptor II in both keloids and NHDFs. Taken together, these results substantiate the hypothesis that the elevated levels of TGF-beta ligands and receptors present in keloids may support increased signaling and a potential role for TGF-beta in keloid pathogenesis.
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Affiliation(s)
- G S Chin
- Children's Surgical Research Program, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305-5148, USA
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Ghert MA, Qi WN, Erickson HP, Block JA, Scully SP. Tenascin-C splice variant adhesive/anti-adhesive effects on chondrosarcoma cell attachment to fibronectin. Cell Struct Funct 2001; 26:179-87. [PMID: 11565810 DOI: 10.1247/csf.26.179] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Tenascin-C is an oligomeric glycoprotein of the extracellular matrix that has been found to have both adhesive and anti-adhesive properties for cells. Recent elucidation of the two major TNC splice variants (320 kDa and 220 kDa) has shed light on the possibility of varying functions of the molecule based on its splicing pattern. Tenascin-C is prominently expressed in embryogenesis and in pathologic conditions such as tumorogenesis and wound healing. Fibronectin is a prominent adhesive molecule of the extracellular matrix that is often co-localized with tenascin-C in these processes. We studied the chondrosarcoma cell line JJ012 with enzyme-linked immunoabsorbance assays, cell attachment assays and antibody-blocking assays to determine the adhesive/anti-adhesive properties of the two major tenascin-C splice variants with respect to fibronectin and their effect on chondrosarcoma cell attachment. We found that the small tenascin-C splice variant (220 kDa) binds to fibronectin, whereas the large tenascin-C splice variant (320 kDa) does not. In addition, the small tenascin-C splice variant was found to decrease adhesion for cells when bound to fibronectin, but contributed to adhesion when bound to plastic in fibronectin-coated wells. Antibody blocking experiments confirmed that both the small tenascin-C splice variant and fibronectin contribute to cell adhesion when bound to plastic. The large tenascin-C splice variant did not promote specific cell attachment. We hypothesize that the biologic activity of tenascin-C is dependent on the tissue-specific splicing pattern. The smaller tenascin-C isoform likely plays a structural and adhesive role, whereas the larger isoform, preferentially expressed in malignant tissue, likely plays a role in cell egress and metastasis.
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Affiliation(s)
- M A Ghert
- Division of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
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Luo S, Benathan M, Raffoul W, Panizzon RG, Egloff DV. Abnormal balance between proliferation and apoptotic cell death in fibroblasts derived from keloid lesions. Plast Reconstr Surg 2001; 107:87-96. [PMID: 11176606 DOI: 10.1097/00006534-200101000-00014] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A new culture model was developed to study the role of proliferation and apoptosis in the etiology of keloids. Fibroblasts were isolated from the superficial, central, and basal regions of six different keloid lesions by using Dulbecco's Modified Eagle Medium containing 10% fetal calf serum as a culture medium. The growth behavior of each fibroblast fraction was examined in short-term and long-term cultures, and the percentage of apoptotic cells was assessed by in situ end labeling of fragmented DNA. The fibroblasts obtained from the superficial and basal regions of keloid tissue showed population doubling times and saturation densities that were similar to those of age-matched normal fibroblasts. In contrast, the fibroblasts from the center of the keloid lesions showed significantly reduced doubling times (25.9 +/- 6.3 hours versus 43.5 +/- 6.3 hours for normal fibroblasts) and reached higher cell densities. In long-term culture, central keloid fibroblasts formed a stratified three-dimensional structure, contracted the self-produced extracellular matrix, and gave rise to nodular cell aggregates, mimicking the formation of keloid tissue. Apoptotic cells were detected in both normal and keloid-derived fibroblasts, but their numbers were twofold higher in normal cells compared with all keloid fibroblasts. To examine whether apoptosis mediates the therapeutic effect of ionizing radiation on keloids, the cells were exposed to gamma rays at a dose of 8 Gy. Under these conditions, a twofold increase in the population of apoptotic cells was detected. These results indicate that the balance between proliferation and apoptosis is impaired in keloid fibroblasts, which could be responsible for the formation of keloid tumors. The results also suggest that keloids contain at least two different fibroblast fractions that vary in growth behavior and extracellular matrix metabolism.
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Affiliation(s)
- S Luo
- Department of Plastic and Reconstructive Surgery, University Hospital of Lausanne (CHUV), Switzerland
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Chin GS, Liu W, Steinbrech D, Hsu M, Levinson H, Longaker MT. Cellular signaling by tyrosine phosphorylation in keloid and normal human dermal fibroblasts. Plast Reconstr Surg 2000; 106:1532-40. [PMID: 11129182 DOI: 10.1097/00006534-200012000-00014] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Keloids represent a dysregulated response to cutaneous wounding that results in disfiguring scars. Unique to humans, keloids are characterized by an accumulation of extracellular matrix components. The underlying molecular mechanisms of keloid pathogenesis, however, remain largely uncharacterized. Similarly, cellular signaling mechanisms, which may indicate inherent differences in the way keloid fibroblasts and normal human dermal fibroblasts interact with extracellular matrix or other cells, have not been investigated. As part of a fundamental assessment of cellular response to injury in keloid fibroblasts, phosphorylation studies were performed using three different keloid (n = 3) and normal human dermal (n = 3) fibroblast cell lines. These studies were undertaken to elucidate whether keloid and normal human dermal fibroblasts exhibit different tyrosine kinase activity. Initially, distinct tyrosine phosphorylation patterns of keloid and normal human dermal fibroblasts were demonstrated. Next, the phosphorylation patterns were correlated with known molecules that may be important to keloid pathogenesis. On the basis of molecular weight, it was hypothesized that the highly phosphorylated bands seen in keloid fibroblasts represented epidermal growth factor receptor (EGFR); discoidin domain receptor 1 (DDR1); and Shc, an adaptor protein known to bind many tyrosine kinases, including EGFR and DDR1. Individual immunoblotting using EGFR, DDR1, and Shc antibodies revealed greater expression in keloid fibroblasts compared with normal human dermal fibroblasts. These data substantiate for the first time the finding of greater phosphorylation by the above-mentioned molecules, which may be important in keloid pathogenesis.
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Affiliation(s)
- G S Chin
- Department of Surgery, New York University Medical Center, New York, USA
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