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Zhang D, Zhu M, Xu P, Wen X, Liang G, Zheng W, Zeng Y, Sun T, Fan R, Lu Y, Tan X, Gong M, Wang T, Chen J, Guan J. Mechanistic Interrogation on Wound Healing and Scar Removing by the Mo 4/3B 2-x Nanoscaffold Revealed Regulated Amino Acid and Purine Metabolism. ACS NANO 2024; 18:23428-23444. [PMID: 39150010 DOI: 10.1021/acsnano.4c06796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Wound rehabilitation is invariably time-consuming, scar formation further weakens therapeutic efficacy, and detailed mechanisms at the molecular level remain unclear. In this work, a Mo4/3B2-x nanoscaffold was fabricated and utilized for wound healing and scar removing in a mice model, while metabolomics was used to study the metabolic reprogramming of metabolome during therapy at the molecular level. The results showed that transition metal borides, called Mo4/3B2-x nanoscaffolds, could mimic superoxide dismutase and glutathione peroxidase to eliminate excess reactive oxygen species (ROS) in the wound microenvironment. During the therapeutic process, the Mo4/3B2-x nanoscaffold could facilitate the regeneration of wounds and removal of scars by regulating the biosynthesis of collagen, fibers, and blood vessels at the pathological, imaging, and molecular levels. Subsequent metabolomics study revealed that the Mo4/3B2-x nanoscaffold effectively ameliorated metabolic disorders in both wound and scar microenvironments through regulating ROS-related pathways including the amino acid metabolic process (including glycine and serine metabolism and glutamate metabolism) and the purine metabolic process. This study is anticipated to illuminate the potential clinical application of the Mo4/3B2-x nanoscaffold as an effective therapeutic agent in traumatic diseases and provide insights into the development of analytical methodology for interrogating wound healing and scar removal-related metabolic mechanisms.
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Affiliation(s)
- Dingkun Zhang
- Department of Neurosurgery, Laboratory of Clinical Proteomics and Metabolomics, Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Man Zhu
- Laboratory of Aging Research, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610050, P. R. China
| | - Pei Xu
- Department of Pathology, Deyang People's Hospital, Deyang 618000, P. R. China
| | - Xue Wen
- Department of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Ge Liang
- Metabolomics and Proteomics Technology Platform, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Wen Zheng
- Metabolomics and Proteomics Technology Platform, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Yu Zeng
- Department of Neurosurgery, Laboratory of Clinical Proteomics and Metabolomics, Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Tong Sun
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Rong Fan
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, P. R. China
- Chengdu Research Institute, City University of Hong Kong, Chengdu 610200, P. R. China
| | - Yang Lu
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, P. R. China
- Chengdu Research Institute, City University of Hong Kong, Chengdu 610200, P. R. China
| | - Xueqin Tan
- Department of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Meng Gong
- Department of Neurosurgery, Laboratory of Clinical Proteomics and Metabolomics, Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Tingting Wang
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Junjie Chen
- Department of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Junwen Guan
- Department of Neurosurgery, Laboratory of Clinical Proteomics and Metabolomics, Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
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Bai Y, Wu P, Zhang Q, Lin F, Hu L, Zhang Z, Huang W, Xiao Y, Zuo Q. Decorin in the spatial control of collagen mineralization. MATERIALS HORIZONS 2024; 11:3396-3407. [PMID: 38690683 DOI: 10.1039/d3mh02216a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Understanding the molecular mechanism by which the periodontal ligament (PDL) is maintained uncalcified between two mineralized tissues (cementum and bone) may facilitate the functional repair and regeneration of the periodontium complex, disrupted in the context of periodontal diseases. However, research that explores the control of type I collagen (COL I) mineralization fails to clarify the detailed mechanism of regulating spatial collagen mineralization, especially in the periodontium complex. In the present study, decorin (DCN), which is characterized as abundant in the PDL region and rare in mineralized tissues, was hypothesized to be a key regulator in the spatial control of collagen mineralization. The circular dichroism results confirmed that DCN regulated the secondary structure of COL I, and the surface plasmon resonance results indicated that COL I possessed a higher affinity for DCN than for other mineralization promoters, such as DMP-1, OPN, BSP and DSPP. These features of DCN may contribute to blocking intrafibrillar mineralization in COL I fibrils during the polymer-induced liquid-precursor mineralization process when the fibrils are cross-linked with DCN. This effect was more remarkable when the fibrils were phosphorylated by sodium trimetaphosphate, as shown by the observation of a tube-like morphology via TEM and mineral sheath via SEM. This study enhances the understanding of the role of DCN in mineralization regulation among periodontal tissues. This provides insights for the development of biomaterials for the regeneration of interfaces between soft and hard tissues.
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Affiliation(s)
- Yuming Bai
- Stomatological Hospital of Xiamen Medical College, Xiamen Medical College, Xiamen, PR China.
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, PR China
- Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, PR China
| | - Peng Wu
- Stomatological Hospital of Xiamen Medical College, Xiamen Medical College, Xiamen, PR China.
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, PR China
- Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, PR China
| | - Qiufang Zhang
- Stomatological Hospital of Xiamen Medical College, Xiamen Medical College, Xiamen, PR China.
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, PR China
- Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, PR China
| | - Feng Lin
- Stomatological Hospital of Xiamen Medical College, Xiamen Medical College, Xiamen, PR China.
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, PR China
- Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, PR China
| | - Ling Hu
- Department of Pharmacy and Pharmaceutical Sciences, Xiamen Medical College, Xiamen, PR China
| | - Zhisheng Zhang
- Stomatological Hospital of Xiamen Medical College, Xiamen Medical College, Xiamen, PR China.
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, PR China
- Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, PR China
| | - Wenxia Huang
- Stomatological Hospital of Xiamen Medical College, Xiamen Medical College, Xiamen, PR China.
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, PR China
- Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, PR China
| | - Yin Xiao
- School of Medicine and Dentistry, Griffith University, Gold Coast, Australia
- Australia-China Centre for Tissue Engineering and Regenerative Medicine, Brisbane, Australia
| | - Qiliang Zuo
- Stomatological Hospital of Xiamen Medical College, Xiamen Medical College, Xiamen, PR China.
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, PR China
- Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, PR China
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De Almeida SD, Richter GM, de Coo A, Jepsen S, Kapferer-Seebacher I, Dommisch H, Berger K, Laudes M, Lieb W, Loos BG, van der Velde N, van Schoor N, de Groot L, Blanco J, Carracedo A, Cruz R, Schaefer AS. A genome-wide association study meta-analysis in a European sample of stage III/IV grade C periodontitis patients ≤35 years of age identifies new risk loci. J Clin Periodontol 2024; 51:431-440. [PMID: 38140892 DOI: 10.1111/jcpe.13922] [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: 09/06/2023] [Revised: 11/07/2023] [Accepted: 12/02/2023] [Indexed: 12/24/2023]
Abstract
AIM Few genome-wide association studies (GWAS) have been conducted for severe forms of periodontitis (stage III/IV grade C), and the number of known risk genes is scarce. To identify further genetic risk variants to improve the understanding of the disease aetiology, a GWAS meta-analysis in cases with a diagnosis at ≤35 years of age was performed. MATERIALS AND METHODS Genotypes from German, Dutch and Spanish GWAS studies of III/IV-C periodontitis diagnosed at age ≤35 years were imputed using TopMed. After quality control, a meta-analysis was conducted on 8,666,460 variants in 1306 cases and 7817 controls with METAL. Variants were prioritized using FUMA for gene-based tests, functional annotation and a transcriptome-wide association study integrating eQTL data. RESULTS The study identified a novel genome-wide significant association in the FCER1G gene (p = 1.0 × 10-9 ), which was previously suggestively associated with III/IV-C periodontitis. Six additional genes showed suggestive association with p < 10-5 , including the known risk gene SIGLEC5. HMCN2 showed the second strongest association in this study (p = 6.1 × 10-8 ). CONCLUSIONS This study expands the set of known genetic loci for severe periodontitis with an age of onset ≤35 years. The putative functions ascribed to the associated genes highlight the significance of oral barrier tissue stability, wound healing and tissue regeneration in the aetiology of these periodontitis forms and suggest the importance of tissue regeneration in maintaining oral health.
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Affiliation(s)
- Silvia Diz De Almeida
- Centro Singular de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER-ISCIII), Instituto de Salud Carlos III, Madrid, Spain
| | - Gesa M Richter
- Department of Periodontology, Oral Medicine and Oral Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Alicia de Coo
- Centro Singular de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Søren Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Ines Kapferer-Seebacher
- Department of Dental and Oral Medicine and Cranio-Maxillofacial and Oral Surgery, University Hospital for Conservative Dentistry and Periodontology, Medical University Innsbruck, Innsbruck, Austria
| | - Henrik Dommisch
- Department of Periodontology, Oral Medicine and Oral Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Klaus Berger
- Institute of Epidemiology and Social Medicine, University Münster, Münster, Germany
| | - Matthias Laudes
- Institute of Diabetes and Clinical Metabolic Research, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Wolfgang Lieb
- Institute of Epidemiology, Christian-Albrechts-University, Kiel, Germany
| | - Bruno G Loos
- Department of Periodontology and Oral Biochemistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Nathalie van der Velde
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Internal Medicine Section of Geriatrics, Amsterdam Medical Center, Amsterdam, The Netherlands
| | - Natasja van Schoor
- Department of Epidemiology and Data Science, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Lisette de Groot
- Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands
| | - Juan Blanco
- Research Group of Medical-Surgery Dentistry (OMEQUI), Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Angel Carracedo
- Centro Singular de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER-ISCIII), Instituto de Salud Carlos III, Madrid, Spain
- Fundación Pública Galega de Medicina Xenómica, Sistema Galego de Saúde (SERGAS) Santiago de Compostela, Santiago de Compostela, Spain
- Genetics Research Group, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain
| | - Raquel Cruz
- Centro Singular de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER-ISCIII), Instituto de Salud Carlos III, Madrid, Spain
| | - Arne S Schaefer
- Department of Periodontology, Oral Medicine and Oral Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
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Adepu S, Lord M, Hugoh Z, Nyström S, Mattsson-Hulten L, Abrahamsson-Aurell K, Lützelschwab C, Skiöldebrand E. Salivary Biglycan-neo-epitope-BGN262: a novel surrogate biomarker for equine osteoarthritic sub-chondral bone sclerosis and to monitor the effect of short-term training and surface arena. OSTEOARTHRITIS AND CARTILAGE OPEN 2023; 5:100354. [PMID: 36968250 PMCID: PMC10033749 DOI: 10.1016/j.ocarto.2023.100354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/22/2022] [Accepted: 03/06/2023] [Indexed: 03/15/2023] Open
Abstract
Objective We aimed to delineate a novel soluble Biglycan Neo-epitope-BGN262 in saliva from young reference and osteoarthritic horses in conjunction with the influence of short-term training exercise, riding surface hardness, circadian rhythm, and feeding on its soluble levels. Design A custom-made inhibition ELISA was used for the quantification of BGN262 in saliva. Cohort 1: A cross-sectional study comprising reference (N = 19) and OA horses (N = 9) with radiographically classified subchondral bone sclerosis. Receiver operating characteristic curve analysis was performed to evaluate the robustness of BGN262. Cohorts 2 (N = 5) & 3 (N = 7): Longitudinal studies of sampling during a short-term training exercise (sand-fibre) and a cross-over design of short-training exercise on 2 different riding arenas (sand and sand-fibre), respectively. Capillary western immunoassay was used to determine the BGN262 molecular size in a selection of saliva samples collected from cohort 1. Results Cohort 1: Salivary BGN262 levels were significantly higher in the OA group. The Receiver operating characteristic curve analysis showed an area under the curve of 0.8304 [0.6386 to 1.022], indicating a good separation from the reference group. Cohorts 2 & 3: Salivary BGN262 levels significantly changed during the exercise on sand and sand-fibre arena, with a trend towards higher levels for sand-fibre. The size of the BGN262 fragment determined by Capillary western assay was 18 kDa. Conclusions The data presented show saliva BGN262 levels as a novel biomarker in evaluating the influence of exercise, and interaction with riding arenas alongside assessing osteoarthritis severity.
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Affiliation(s)
- S. Adepu
- Department of Pathology, Institute of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Corresponding author.
| | - M. Lord
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - Z. Hugoh
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - S. Nyström
- Department of Clinical Chemistry and Transfusion Medicine, Institute of Biomedicine, Sahlgrenska University Hospital, Gothenburg University, Gothenburg, Sweden
| | - L. Mattsson-Hulten
- Department of Clinical Chemistry and Transfusion Medicine, Institute of Biomedicine, Sahlgrenska University Hospital, Gothenburg University, Gothenburg, Sweden
| | - K. Abrahamsson-Aurell
- Hallands Djursjukhus Kungsbacka Hästklinik, Älvsåkers Byväg 20, 434 95 Kungsbacka, Sweden
| | - C. Lützelschwab
- Department of Pathology, Institute of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - E. Skiöldebrand
- Department of Pathology, Institute of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
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5
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Qin W, Zhang J, Rong R, Zhang L, Gao H, Liu C, Ren Q, Zheng G, Wang J, Meng L, Qiao S, Qian R, Zhou C, Wang H, Zhang Y. Osteoglycin (OGN) promotes tumorigenesis of pancreatic cancer cell via targeting ID4. Tissue Cell 2022; 78:101867. [DOI: 10.1016/j.tice.2022.101867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 07/11/2022] [Accepted: 07/14/2022] [Indexed: 12/01/2022]
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Desai K, Kale A, Angadi P, Datar U, Belaldavar C, Arany P. Role of programmed cell death 4 in myofibroblast differentiation in oral submucous fibrosis. J Oral Maxillofac Pathol 2021; 25:430-436. [PMID: 35281179 PMCID: PMC8859592 DOI: 10.4103/jomfp.jomfp_86_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/30/2021] [Accepted: 05/31/2021] [Indexed: 11/04/2022] Open
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Bi J, Intriago MFB, Koivisto L, Jiang G, Häkkinen L, Larjava H. Leucocyte‐ and platelet‐rich fibrin regulates expression of genes related to early wound healing in human gingival fibroblasts. J Clin Periodontol 2020; 47:851-862. [DOI: 10.1111/jcpe.13293] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/03/2020] [Accepted: 04/11/2020] [Indexed: 01/30/2023]
Affiliation(s)
- Jiarui Bi
- Faculty of Dentistry Department of Oral Biological and Medical Sciences University of British Columbia Vancouver BC Canada
| | - Maria Fernanda Barona Intriago
- Faculty of Dentistry Department of Oral Biological and Medical Sciences University of British Columbia Vancouver BC Canada
| | - Leeni Koivisto
- Faculty of Dentistry Department of Oral Biological and Medical Sciences University of British Columbia Vancouver BC Canada
| | - Guoqiao Jiang
- Faculty of Dentistry Department of Oral Biological and Medical Sciences University of British Columbia Vancouver BC Canada
| | - Lari Häkkinen
- Faculty of Dentistry Department of Oral Biological and Medical Sciences University of British Columbia Vancouver BC Canada
| | - Hannu Larjava
- Faculty of Dentistry Department of Oral Biological and Medical Sciences University of British Columbia Vancouver BC Canada
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Sui Z, Sun H, Weng Y, Zhang X, Sun M, Sun R, Zhao B, Liang Z, Zhang Y, Li C, Zhang L. Quantitative proteomics analysis of deer antlerogenic periosteal cells reveals potential bioactive factors in velvet antlers. J Chromatogr A 2020; 1609:460496. [DOI: 10.1016/j.chroma.2019.460496] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/17/2019] [Accepted: 08/28/2019] [Indexed: 01/15/2023]
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9
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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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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: 555] [Impact Index Per Article: 69.4] [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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11
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Hultgårdh-Nilsson A, Borén J, Chakravarti S. The small leucine-rich repeat proteoglycans in tissue repair and atherosclerosis. J Intern Med 2015; 278:447-61. [PMID: 26477596 PMCID: PMC4616156 DOI: 10.1111/joim.12400] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Proteoglycans consist of a protein core with one or more covalently attached glycosaminoglycan (GAG) side chains and have multiple roles in the initiation and progression of atherosclerosis. Here we discuss the potential and known functions of a group of small leucine-rich repeat proteoglycans (SLRPs) in atherosclerosis. We focus on five SLRPs, decorin, biglycan, lumican, fibromodulin and PRELP, because these have been detected in atherosclerotic plaques or demonstrated to have a role in animal models of atherosclerosis. Decorin and biglycan are modified post-translationally by substitution with chondroitin/dermatan sulphate GAGs, whereas lumican, fibromodulin and PRELP have keratan sulphate side chains, and the core proteins have leucine-rich repeat (LRR) motifs that are characteristic of the LRR superfamily. The chondroitin/dermatan sulphate GAG side chains have been implicated in lipid retention in atherosclerosis. The core proteins are discussed here in the context of (i) interactions with collagens and their implications in tissue integrity, fibrosis and wound repair and (ii) interactions with growth factors, cytokines, pathogen-associated molecular patterns and cell surface receptors that impact normal physiology and disease processes such as inflammation, innate immune responses and wound healing (i.e. processes that are all important in plaque development and progression). Thus, studies of these SLRPs in the context of wound healing are providing clues about their functions in early stages of atherosclerosis to plaque vulnerability and cardiovascular disease at later stages. Understanding of signal transduction pathways regulated by the core protein interactions is leading to novel roles and therapeutic potential for these proteins in wound repair and atherosclerosis.
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Affiliation(s)
| | - J Borén
- Department of Molecular and Clinical Medicine/Wallenberg Laboratory, University of Gothenburg and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - S Chakravarti
- Departments of Medicine, Ophthalmology and Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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12
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Cooper NH, Balachandra JP, Hardman MJ. Global Gene Expression Analysis in PKCα-/- Mouse Skin Reveals Structural Changes in the Dermis and Defective Wound Granulation Tissue. J Invest Dermatol 2015; 135:3173-3182. [PMID: 26354149 DOI: 10.1038/jid.2015.338] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 08/10/2015] [Accepted: 08/12/2015] [Indexed: 01/06/2023]
Abstract
The skin's mechanical integrity is maintained by an organized and robust dermal extracellular matrix (ECM). Resistance to mechanical disruption hinges primarily on homeostasis of the dermal collagen fibril architecture, which is regulated, at least in part, by members of the small leucine-rich proteoglycan (SLRP) family. Here we present data linking protein kinase C alpha (PKCα) to the regulated expression of multiple ECM components including SLRPs. Global microarray profiling reveals deficiencies in ECM gene expression in PKCα-/- skin correlating with abnormal collagen fibril morphology, disorganized dermal architecture, and reduced skin strength. Detailed analysis of the skin and wounds from wild-type and PKCα-/- mice reveals a failure to upregulate collagen and other ECM components in response to injury, resulting in delayed granulation tissue deposition in PKCα-/- wounds. Thus, our data reveal a previously unappreciated role for PKCα in the regulation of ECM structure and deposition during skin wound healing.
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Affiliation(s)
- Nichola H Cooper
- The Healing Foundation Centre, Faculty of Life Sciences, University of Manchester, Manchester, UK; Institute of Medical Biology, Epithelial Epigenetics Laboratory, Agency for Science, Technology and Research, Singapore, Singapore
| | - Jeya P Balachandra
- The Healing Foundation Centre, Faculty of Life Sciences, University of Manchester, Manchester, UK
| | - Matthew J Hardman
- The Healing Foundation Centre, Faculty of Life Sciences, University of Manchester, Manchester, UK.
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Tarzemany R, Jiang G, Larjava H, Häkkinen L. Expression and function of connexin 43 in human gingival wound healing and fibroblasts. PLoS One 2015; 10:e0115524. [PMID: 25584940 PMCID: PMC4293150 DOI: 10.1371/journal.pone.0115524] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 11/25/2014] [Indexed: 11/18/2022] Open
Abstract
Connexins (C×s) are a family of transmembrane proteins that form hemichannels and gap junctions (GJs) on the cell membranes, and transfer small signaling molecules between the cytoplasm and extracellular space and between connecting cells, respectively. Among C×s, suppressing C×43 expression or function promotes skin wound closure and granulation tissue formation, and may alleviate scarring, but the mechanisms are not well understood. Oral mucosal gingiva is characterized by faster wound closure and scarless wound healing outcome as compared to skin wounds. Therefore, we hypothesized that C×43 function is down regulated during human gingival wound healing, which in fibroblasts promotes expression of genes conducive for fast and scarless wound healing. Cultured gingival fibroblasts expressed C×43 as their major connexin. Immunostaining of unwounded human gingiva showed that C×43 was abundantly present in the epithelium, and in connective tissue formed large C×43 plaques in fibroblasts. At the early stages of wound healing, C×43 was strongly down regulated in wound epithelial cells and fibroblasts, returning to the level of normal tissue by day 60 post-wounding. Blocking of C×43 function by C×43 mimetic peptide Gap27 suppressed GJ-mediated dye transfer, promoted migration, and caused significant changes in the expression of wound healing-associated genes in gingival fibroblasts. In particular, out of 54 genes analyzed, several MMPs and TGF-β1, involved in regulation of inflammation and extracellular matrix (ECM) turnover, and VEGF-A, involved in angiogenesis, were significantly upregulated while pro-fibrotic ECM molecules, including Collagen type I, and cell contractility-related molecules were significantly down regulated. These responses involved MAPK, GSK3α/β and TGF-β signaling pathways, and AP1 and SP1 transcription factors. Thus, suppressed function of C×43 in fibroblasts promotes their migration, and regulates expression of wound healing-associated genes via AP1, SP1, MAPK, GSK3α/β and TGF-β signaling pathways, and may promote fast and scarless wound healing in human gingiva.
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Affiliation(s)
- Rana Tarzemany
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada
| | - Guoqiao Jiang
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada
| | - Hannu Larjava
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada
| | - Lari Häkkinen
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada
- * E-mail:
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Human gingival fibroblasts display a non-fibrotic phenotype distinct from skin fibroblasts in three-dimensional cultures. PLoS One 2014; 9:e90715. [PMID: 24608113 PMCID: PMC3946595 DOI: 10.1371/journal.pone.0090715] [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: 11/06/2013] [Accepted: 02/05/2014] [Indexed: 11/23/2022] Open
Abstract
Scar formation following skin injury can be a major psychosocial and physiological problem. However, the mechanisms of scar formation are still not completely understood. Previous studies have shown that wound healing in oral mucosa is faster, associates with a reduced inflammatory response and results to significantly reduced scar formation compared with skin wounds. In the present study, we hypothesized that oral mucosal fibroblasts from human gingiva are inherently distinct from fibroblasts from breast and abdominal skin, two areas prone to excessive scar formation, which may contribute to the preferential wound healing outcome in gingiva. To this end, we compared the phenotype of human gingival and skin fibroblasts cultured in in vivo-like three-dimensional (3D) cultures that mimic the cells' natural extracellular matrix (ECM) niche. To establish 3D cultures, five parallel fibroblast lines from human gingiva (GFBLs) and breast skin (SFBLs) were seeded in high density, and cultured for up to 21 days in serum and ascorbic acid containing medium to induce expression of wound-healing transcriptome and ECM deposition. Cell proliferation, morphology, phenotype and expression of wound healing and scar related genes were analyzed by real-time RT-PCR, Western blotting and immunocytochemical methods. The expression of a set of genes was also studied in three parallel lines of human abdominal SFBLs. Findings showed that GFBLs displayed morphologically distinct organization of the 3D cultures and proliferated faster than SFBLs. GFBLs expressed elevated levels of molecules involved in regulation of inflammation and ECM remodeling (MMPs) while SFBLs showed significantly higher expression of TGF-β signaling, ECM and myofibroblast and cell contractility-related genes. Thus, GFBLs display an inherent phenotype conducive for fast resolution of inflammation and ECM remodeling, characteristic for scar-free wound healing, while SFBLs have a profibrotic, scar-prone phenotype.
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Akram KM, Samad S, Spiteri MA, Forsyth NR. Mesenchymal stem cells promote alveolar epithelial cell wound repair in vitro through distinct migratory and paracrine mechanisms. Respir Res 2013; 14:9. [PMID: 23350749 PMCID: PMC3598763 DOI: 10.1186/1465-9921-14-9] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 01/22/2013] [Indexed: 01/09/2023] Open
Abstract
Background Mesenchymal stem cells (MSC) are in clinical trials for widespread indications including musculoskeletal, neurological, cardiac and haematological disorders. Furthermore, MSC can ameliorate pulmonary fibrosis in animal models although mechanisms of action remain unclear. One emerging concept is that MSCs may have paracrine, rather than a functional, roles in lung injury repair and regeneration. Methods To investigate the paracrine role of human MSC (hMSC) on pulmonary epithelial repair, hMSC-conditioned media (CM) and a selected cohort of hMSC-secretory proteins (identified by LC-MS/MS mass spectrometry) were tested on human type II alveolar epithelial cell line A549 cells (AEC) and primary human small airway epithelial cells (SAEC) using an in vitro scratch wound repair model. A 3D direct-contact wound repair model was further developed to assess the migratory properties of hMSC. Results We demonstrate that MSC-CM facilitates AEC and SAEC wound repair in serum-dependent and –independent manners respectively via stimulation of cell migration. We also show that the hMSC secretome contains an array of proteins including Fibronectin, Lumican, Periostin, and IGFBP-7; each capable of influencing AEC and SAEC migration and wound repair stimulation. In addition, hMSC also show a strong migratory response to AEC injury as, supported by the observation of rapid and effective AEC wound gap closure by hMSC in the 3D model. Conclusion These findings support the notion for clinical application of hMSCs and/or their secretory factors as a pharmacoregenerative modality for the treatment of idiopathic pulmonary fibrosis (IPF) and other fibrotic lung disorders.
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Affiliation(s)
- Khondoker M Akram
- Institute for Science and Technology in Medicine, School of Postgraduate Medicine, Keele University, Stoke-on-Trent, Staffordshire ST4 7QB, UK
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Honardoust D, Kwan P, Momtazi M, Ding J, Tredget EE. Novel methods for the investigation of human hypertrophic scarring and other dermal fibrosis. Methods Mol Biol 2013; 1037:203-31. [PMID: 24029937 DOI: 10.1007/978-1-62703-505-7_11] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Hypertrophic scar (HTS) represents the dermal equivalent of fibroproliferative disorders that occur after injury involving the deep dermis while superficial wounds to the skin heal with minimal or no scarring. HTS is characterized by progressive deposition of collagen that occurs with high frequency in adult dermal wounds following traumatic or thermal injury. Increased levels of transforming growth factor-β1 (TGF-β1), decreased expression of small leucine-rich proteoglycans (SLRPs), and/or fibroblast subtypes may influence the development of HTS. The development of HTS is strongly influenced by the cellular and molecular properties of fibroblast subtypes, where cytokines such as fibrotic TGF-β1 and CTGF as well as the expression of SLRPs, particularly decorin and fibromodulin, regulate collagen fibrillogenesis and the activity of TGF-β1. Reduced anti-fibrotic molecules in the ECM of the deep dermis and the distinctive behavior of the fibroblasts in this region of the dermis which display increased sensitivity to TGF-β1's biological activity contribute to the development of HTS following injury to the deep dermis. By comparing the cellular and molecular differences involved in deep and superficial wound healing in an experimental wound scratch model in humans that has both superficial and deep injuries within the same excisional model, our aim is to increase our understanding of how tissue repair following injury to the deep dermis can be changed to promote healing with a similar pattern to healing that occurs following superficial injury that results in no or minimal scarring. Studying the characteristics of superficial dermal injuries that heal with minimal scarring will help us identify therapeutic approaches for tissue engineering and wound healing. In addition, our ability to develop novel therapies for HTS is hampered by limitations in the available animal models used to study this disorder in vivo. We also describe a nude mouse model of transplanted human skin that develops a hypertrophic proliferative scar consistent morphologically and histologically with human HTS, which can be used to test novel treatment options for these dermal fibrotic conditions.
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Affiliation(s)
- Dariush Honardoust
- Wound Healing Research Group, Plastic Surgery Research Laboratory, Department of Surgery, University of Alberta, Edmonton, AB, Canada
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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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18
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Kiga N, Tojyo I, Matsumoto T, Hiraishi Y, Shinohara Y, Makino S, Fujita S. Expression of lumican and fibromodulin following interleukin-1 beta stimulation of disc cells of the human temporomandibular joint. Eur J Histochem 2012; 55:e11. [PMID: 22073367 PMCID: PMC3203468 DOI: 10.4081/ejh.2011.e11] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Accepted: 02/22/2011] [Indexed: 11/23/2022] Open
Abstract
Small leucine-rich repeat proteoglycans (SLRP) are present in the extracellular matrix of the temporomandibular joint (TMJ) disc. Lumican and fibromodulin, classified as class 2 SLRPs, play important roles in TMJ assembly, proliferation and inflammation. Degenerative change in the TMJ disc gives rise to the process of internal derangement (ID). In this study, we immunohistochemically examined the expression of lumican and fibromodulin in nine human TMJ specimens and examined the gene expression of both proteoglycans in cultured human TMJ disc cells under interleukin-1 beta (IL-1 β)-stimulated conditions. An articular disc cell line was established by collagenase treatment of a TMJ disc. The subcultured cells were then incubated for 1, 3, 6, 12, 24 or 48 h under both normal and IL-1 β (1 ng/mL) conditions. The gene expression of lumican and fibromodulin was examined using the reverse transcription-polymerase chain reaction (RT-PCR) and real-time RT-PCR. We demonstrated that the expression of lumican significantly differs from that of fibromodulin in the deformed disc and that IL-1 β induces a significant increase in lumican mRNA, but not in fibromodulin mRNA, after 24∼48 h culture compared to cells cultured in the absence of IL-1 β (P<0.05). These results indicate that lumican and fibromodulin display different behaviors and that lumican may promote regeneration of the TMJ after degeneration and deformation induced by IL-1 β.
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Affiliation(s)
- N Kiga
- Department of Oral and Maxillofacial Surgery, Wakayama Medical University, Japan.
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19
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Reduced Decorin, Fibromodulin, and Transforming Growth Factor-β3 in Deep Dermis Leads to Hypertrophic Scarring. J Burn Care Res 2012; 33:218-27. [DOI: 10.1097/bcr.0b013e3182335980] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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20
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Satish L, Lo N, Gallo PH, Johnson S, Haberman S, Kathju S. Chaperonin containing T-complex polypeptide (CCT) subunit expression in oral mucosal wounds and fibroblasts. Cell Stress Chaperones 2011; 16:675-80. [PMID: 21710295 PMCID: PMC3220385 DOI: 10.1007/s12192-011-0274-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 06/09/2011] [Accepted: 06/10/2011] [Indexed: 12/11/2022] Open
Abstract
Mucosal wound healing in adults has been reported to feature diminished scar formation compared to healing skin wounds. We sought to determine if the expression pattern of chaperonin containing T-complex polypeptide (CCT) subunits in mucosal wounds and fibroblasts is different from that observed in skin wounds and fibroblasts. We found that CCT-beta is the only subunit message to be reduced in wounded mucosa versus unwounded control, and this reduction was confirmed at the protein level. In contrast, mRNA levels of CCT-zeta, -delta, -eta, and -epsilon were significantly increased in mucosal wounds. The increase in CCT-eta was also confirmed at the protein level. Expression levels of CCT-alpha, -beta, -delta; -epsilon, and -theta mRNAs were significantly increased in adult mucosal fibroblasts in culture compared to skin-derived fibroblasts. Western blot analyses confirmed a modest increase in CCT-beta in adult mucosal fibroblasts relative to skin fibroblasts, but CCT-eta protein was unaffected. These differences may contribute to the reported difference in healing outcomes between these two tissue types.
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Affiliation(s)
- Latha Satish
- Center for Genomic Sciences, Allegheny-Singer Research Institute, Allegheny General Hospital, Pittsburgh, PA 15212 USA
| | - Nancy Lo
- Drexel University College of Medicine, Queen Lane Medical Campus, Philadelphia, PA 19129 USA
| | - Phillip H. Gallo
- Center for Genomic Sciences, Allegheny-Singer Research Institute, Allegheny General Hospital, Pittsburgh, PA 15212 USA
| | - Sandra Johnson
- Center for Genomic Sciences, Allegheny-Singer Research Institute, Allegheny General Hospital, Pittsburgh, PA 15212 USA
| | - Stephanie Haberman
- Center for Genomic Sciences, Allegheny-Singer Research Institute, Allegheny General Hospital, Pittsburgh, PA 15212 USA
| | - Sandeep Kathju
- Center for Genomic Sciences, Allegheny-Singer Research Institute, Allegheny General Hospital, Pittsburgh, PA 15212 USA
- Wound Healing Program, Center for Genomic Sciences, Allegheny-Singer Research Institute, 320 East North Avenue, Pittsburgh, PA 15212-4772 USA
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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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22
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Honardoust D, Varkey M, Hori K, Ding J, Shankowsky HA, Tredget EE. Small leucine-rich proteoglycans, decorin and fibromodulin, are reduced in postburn hypertrophic scar. Wound Repair Regen 2011; 19:368-78. [PMID: 21518082 DOI: 10.1111/j.1524-475x.2011.00677.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Small leucine-rich proteoglycans (SLRPs) are extracellular matrix molecules that regulate collagen fibrillogenesis and inhibit transforming growth factor-β activity; thus, they may play a critical role in wound healing and scar formation. Hypertrophic scarring is a dermal form of fibroproliferative disorders, which occurs in over 70% of burn patients and leads to disfigurement and limitations in function. By understanding the cellular and molecular mechanisms that lead to scarring after injury, new clinical therapeutic approaches can by developed to minimize abnormal scar formation in hypertrophic scarring and other fibroproliferative disorders. To study the expression and localization of SLRPs with connective tissue cells in tissue immunohistochemistry, immunofluorescence staining, immunoblotting, and reverse-transcription polymerase chain reaction were used in normal skin and hypertrophic scar (HTS). In normal skin, there was more decorin and fibromodulin accumulation in the superficial layers than in the deeper dermal layers. The levels of decorin and fibromodulin were significantly lower in HTS, whereas biglycan was increased when compared with normal skin. There was an increased expression of biglycan, fibromodulin, and lumican in the basement membrane and around basal epithelial cells. In contrast, these proteoglycans were absent or weakly expressed in HTS. The findings suggest that down-regulation of SLRPs after wound healing in deep injuries to the skin plays an important role in the development of fibrosis and HTS.
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Affiliation(s)
- Dariush Honardoust
- Wound Healing Research Group, Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Alberta, Edmonton, Alberta, Canada
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Williams KE, Fulford LA, Albig AR. Lumican reduces tumor growth via induction of fas-mediated endothelial cell apoptosis. CANCER MICROENVIRONMENT 2010; 4:115-26. [PMID: 21505566 DOI: 10.1007/s12307-010-0056-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Accepted: 11/02/2010] [Indexed: 02/06/2023]
Abstract
Matrikines are important components of tumor microenvironments that integrate communication between extracellular matricies and membrane-bound receptors thereby regulating cellular behaviors. One such matrikine that is differentially expressed in cancer microenvironments is the extracellular matrix protein lumican; however its precise role in cancer remains ambiguous. To study the effects of lumican on cancer cells, we created lumican-overexpressing cell lines from murine fibrosarcoma (MCA102) and pancreatic adenocarcinoma (Pan02) cells. Lumican overexpression in Pan02 cells increased invasiveness, decreased soft agar colony size, and increased proliferation. Conversely in MCA102 cells, lumican decreased invasiveness, increased soft agar colony size, but did not influence proliferation. In contrast to these pleiotropic in vitro results, lumican overexpression within the in vivo tumor microenvironment produced uniformly smaller tumors. Importantly, reduced tumor size was correlated with reduced vascular density. Consistent with lumican's proposed anti-angiogenic activity, lumican increased endothelial cell apoptosis. Importantly, lumican was previously shown to influence Fas expression and our results show that lumican enhanced Fas mediated endothelial cell apoptosis although we were unable to detect any difference in Fas or Fas ligand expression between lumican-overexpressing and control cells. Interestingly, lumican had no effect on MCA102 apoptosis, suggesting that the observed reduction in tumor size is specifically due to endothelial cell apoptosis rather than a direct effect on the cancerous cells themselves. Therefore, this study is the first to demonstrate a causal relationship between tumor reduction and lumican's effect on angiogenesis as opposed to an effect on the cancerous cells themselves.
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Affiliation(s)
- Kent E Williams
- Department of Biology, Indiana State University, 600 Chestnut St., Terre Haute, IN 47809 USA
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Yeh JT, Yeh LK, Jung SM, Chang TJ, Wu HH, Shiu TF, Liu CY, Kao WY, Chu PH. Impaired skin wound healing in lumican-null mice. Br J Dermatol 2010; 163:1174-80. [DOI: 10.1111/j.1365-2133.2010.10008.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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