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Gan C, Yao S, Pan R. Effect of recombinant plasmid heat shock protein 47 small interfering ribonucleic acid on the scarring of the filtering channel after filtration surgery in rabbit eyes. Int Ophthalmol 2025; 45:137. [PMID: 40167871 DOI: 10.1007/s10792-025-03511-8] [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: 04/09/2024] [Accepted: 03/09/2025] [Indexed: 04/02/2025]
Abstract
OBJECTIVE This study aimed to investigate the effects of recombinant plasmid heat shock protein 47 small interfering ribonucleic acid (HSP47-siRNA) on fibroblast proliferation and collagenous fibre synthesis in the filtering channel after trabeculectomy in rabbit. METHODS The recombinant plasmid HSP47-siRNA was constructed successfully to extract sufficient recombinant plasmids. Furthermore, an animal model of anti-glaucoma surgery in rabbit eyes was created to establish the HSP47-siRNA group, empty vector group, mitomycin C (MMC) group and normal saline group. This study further observed the postoperative eye condition, measured the intraocular pressure and carried out histological and immunohistochemical staining analysis. RESULTS At different time points after surgery, there were no significant differences in the comparison of filtering bleb morphology, conjunctival congestion, corneal oedema, inflammation and depth of anterior chamber or lens opacity among the HSP47-siRNA, empty vector, MMC and normal saline groups. Within 7 days after surgery, filtering blebs in all groups were bulged and diffused, with no statistically significant difference (p > 0.05). On day 15 and day 30 after surgery, the upper filtering bleb gradually decreased in the empty vector group and the normal saline group compared with the HSP47-siRNA group (p < 0.01). On day 30 after surgery, flat and pale scar tissues were observed in the surgical area of the empty vector and normal saline groups, whereas functional blebs were still observed in the HSP47-siRNA and MMC groups. Within 7 days after surgery, the intraocular pressure significantly decreased in each group, with a statistically significant difference compared with that before surgery (p < 0.01). CONCLUSION HSP47-siRNA exhibits application potential concerning its effects on anti-scarring after glaucoma filtration surgery in rabbit.
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Affiliation(s)
- Chunfang Gan
- Department of Ophthalmology, Ya'an People's Hospital, No. 9 Ankang Road, Yucheng District, Ya'an City, 625000, Sichuan Province, China
| | - Shasha Yao
- Department of Ophthalmology, Ya'an People's Hospital, No. 9 Ankang Road, Yucheng District, Ya'an City, 625000, Sichuan Province, China
| | - Rugang Pan
- Department of Ophthalmology, Ya'an People's Hospital, No. 9 Ankang Road, Yucheng District, Ya'an City, 625000, Sichuan Province, China.
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Yang X, Yang Y, Zhao M, Bai H, Fu C. Identification of DYRK2 and TRIM32 as keloids programmed cell death-related biomarkers: insights from bioinformatics and machine learning in multiple cohorts. Comput Methods Biomech Biomed Engin 2025:1-15. [PMID: 40127455 DOI: 10.1080/10255842.2025.2482129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2024] [Revised: 03/12/2025] [Accepted: 03/14/2025] [Indexed: 03/26/2025]
Abstract
This study aims to explore the expression patterns and mechanisms of programmed cell death-related genes in keloids and identify molecular targets for early diagnosis and treatment. We first explored the expression, immune, and biological function profiles of keloids. Using various machine learning methods, two key genes, DYRK2 and TRIM32, were identified, with ROC curves demonstrating their diagnostic potential. Further analyses, including GSEA, immune cell profiling, competing endogenous RNA network, and single-cell analysis, revealed their mechanism of action and regulatory network. Finally, SB-431542 was identified as a potential therapeutic agent for keloids through CMap and molecular docking.
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Affiliation(s)
- Xi Yang
- Department of Plastic Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Yao Yang
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Mingjian Zhao
- Department of Plastic Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - He Bai
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Chongyang Fu
- Department of Hand and Microsurgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
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Latoni DI, McDaniel DC, Tsao H, Tsao SS. Update on the Pathogenesis of Keloid Formation. JID INNOVATIONS 2024; 4:100299. [PMID: 39247523 PMCID: PMC11378114 DOI: 10.1016/j.xjidi.2024.100299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/12/2024] [Accepted: 06/24/2024] [Indexed: 09/10/2024] Open
Abstract
Keloids are abnormal skin growths occurring in a significant portion of the global population. Despite their pervasiveness, the underlying pathophysiology of this scarring process is yet to be fully understood. In this review article, we delve into the current literature on the pathophysiological mechanisms of keloids. We take a top-down approach, first looking at host factors such as genetics and endocrine factors and then taking a more granular approach describing specific control factors such as germline keloid predisposition variants, epigenetics and transcriptomics, inflammatory and immune dysregulation, and the role of profibrotic and angiogenic cell signaling pathways. We then discuss current knowledge gaps, propose further research avenues, and explore potential future treatment options considering our increased understanding of keloid pathogenesis.
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Affiliation(s)
- David I Latoni
- Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Danica C McDaniel
- Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Hensin Tsao
- Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Sandy S Tsao
- Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts, USA
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Deng Z, Fan T, Xiao C, Tian H, Zheng Y, Li C, He J. TGF-β signaling in health, disease, and therapeutics. Signal Transduct Target Ther 2024; 9:61. [PMID: 38514615 PMCID: PMC10958066 DOI: 10.1038/s41392-024-01764-w] [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: 12/07/2022] [Revised: 08/31/2023] [Accepted: 01/31/2024] [Indexed: 03/23/2024] Open
Abstract
Transforming growth factor (TGF)-β is a multifunctional cytokine expressed by almost every tissue and cell type. The signal transduction of TGF-β can stimulate diverse cellular responses and is particularly critical to embryonic development, wound healing, tissue homeostasis, and immune homeostasis in health. The dysfunction of TGF-β can play key roles in many diseases, and numerous targeted therapies have been developed to rectify its pathogenic activity. In the past decades, a large number of studies on TGF-β signaling have been carried out, covering a broad spectrum of topics in health, disease, and therapeutics. Thus, a comprehensive overview of TGF-β signaling is required for a general picture of the studies in this field. In this review, we retrace the research history of TGF-β and introduce the molecular mechanisms regarding its biosynthesis, activation, and signal transduction. We also provide deep insights into the functions of TGF-β signaling in physiological conditions as well as in pathological processes. TGF-β-targeting therapies which have brought fresh hope to the treatment of relevant diseases are highlighted. Through the summary of previous knowledge and recent updates, this review aims to provide a systematic understanding of TGF-β signaling and to attract more attention and interest to this research area.
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Affiliation(s)
- Ziqin Deng
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Tao Fan
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Chu Xiao
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - He Tian
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Yujia Zheng
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Chunxiang Li
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
| | - Jie He
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
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Dirand Z, Tissot M, Chatelain B, Viennet C, Rolin G. Is Spheroid a Relevant Model to Address Fibrogenesis in Keloid Research? Biomedicines 2023; 11:2350. [PMID: 37760792 PMCID: PMC10526056 DOI: 10.3390/biomedicines11092350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/18/2023] [Accepted: 08/18/2023] [Indexed: 09/29/2023] Open
Abstract
Keloid refers to a fibro-proliferative disorder characterized by an accumulation of extracellular matrix at the dermis level, overgrowing beyond the initial wound and forming tumor-like nodule areas. The absence of treatment for keloid is clearly related to limited knowledge about keloid etiology. In vitro, keloids were classically studied through fibroblasts monolayer culture, far from keloid in vivo complexity. Today, cell aggregates cultured as 3D spheroid have gained in popularity as new tools to mimic tissue in vitro. However, no previously published works on spheroids have specifically focused on keloids yet. Thus, we hypothesized that spheroids made of keloid fibroblasts (KFs) could be used to model fibrogenesis in vitro. Our objective was to qualify spheroids made from KFs and cultured in a basal or pro-fibrotic environment (+TGF-β1). As major parameters for fibrogenesis assessment, we evaluated apoptosis, myofibroblast differentiation and response to TGF-β1, extracellular matrix (ECM) synthesis, and ECM-related genes regulation in KFs spheroids. We surprisingly observed that fibrogenic features of KFs are strongly downregulated when cells are cultured in 3D. In conclusion, we believe that spheroid is not the most appropriate model to address fibrogenesis in keloid, but it constitutes an efficient model to study the deactivation of fibrotic cells.
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Affiliation(s)
- Zélie Dirand
- Université de Franche-Comté, Sciences Médicales et Pharmaceutiques, EFS, INSERM, UMR RIGHT, 25000 Besançon, France; (Z.D.)
| | - Marion Tissot
- Université de Franche-Comté, Sciences Médicales et Pharmaceutiques, EFS, INSERM, UMR RIGHT, 25000 Besançon, France; (Z.D.)
| | - Brice Chatelain
- Service de Chirurgie Maxillo-Faciale, Stomatologie et Odontologie Hospitalière, CHU Besançon, 25000 Besançon, France
| | - Céline Viennet
- Université de Franche-Comté, Sciences Médicales et Pharmaceutiques, EFS, INSERM, UMR RIGHT, 25000 Besançon, France; (Z.D.)
| | - Gwenaël Rolin
- Université de Franche-Comté, Sciences Médicales et Pharmaceutiques, CHU Besançon EFS, INSERM, UMR RIGHT, 25000 Besançon, France
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Teplitsky JE, Vinokurtseva A, Armstrong JJ, Denstedt J, Liu H, Hutnik CML. ALK5 Inhibition of Subconjunctival Scarring From Glaucoma Surgery: Effects of SB-431542 Compared to Mitomycin C in Human Tenon's Capsule Fibroblasts. Transl Vis Sci Technol 2023; 12:31. [PMID: 36826843 PMCID: PMC9973532 DOI: 10.1167/tvst.12.2.31] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Abstract
Purpose The gold standard for managing postoperative ocular fibrosis in glaucoma surgery is the chemotherapeutic mitomycin C (MMC) despite its association with significant adverse effects. This study compares in vitro the antifibrotic efficacy and cytotoxicity of the small-molecule TGFβ1 inhibitor SB-431542 (SB) to MMC. Methods To measure collagen contraction, human Tenon's capsule fibroblasts (HTCFs) embedded in a three-dimensional collagen lattice were exposed to 0.2 mg/mL MMC or 20 µM SB followed by incubation with 2 ng/mL TGFβ1. Total protein extracted from experimentally treated HTCFs underwent immunoblotting for α-smooth muscle actin (α-SMA), matrix metallopeptidase 9 (MMP-9), and EDA splice-variant fibronectin (EDA-FN) expression. Cytotoxicity and cell metabolism were assessed using LIVE/DEAD staining, lactate dehydrogenase (LDH) assay, and methylthiazole tetrazolium (MTT) assay. Results Collagen lattice contraction in TGFβ1-induced HTCFs was significantly lowered by SB and MMC. Pretreatment with SB and MMC significantly lowered protein expression of α-SMA, MMP-9, and EDA-FN in HTCFs relative to TGFβ1 alone. HTCF viability in collagen lattices was significantly reduced with MMC pretreatment but not SB pretreatment. MMC-pretreated HTCFs had a significant increase in LDH release after 3 hours and a decrease in MTT activity after 20 minutes, while SB-pretreated HTCFs showed no significant changes via MTT or LDH assay during the same treatment period. Conclusions SB shows comparable efficacy to MMC in reducing expression of fibrosis-promoting proteins in HTCFs and in vitro scarring activity. SB distinguishes itself from MMC by exhibiting less cytotoxicity in both two-dimensional and three-dimensional in vitro assays. Translational Relevance This study demonstrates in vitro the potential of SB as a safer alternative ocular antifibrotic agent.
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Affiliation(s)
- Jack E. Teplitsky
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Anastasiya Vinokurtseva
- Department of Ophthalmology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| | - James J. Armstrong
- Department of Ophthalmology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada,Ivey Eye Institute, St. Joseph's Health Care, London, Ontario, Canada
| | - James Denstedt
- Department of Ophthalmology, University of Ottawa, Ottawa, Ontario, Canada
| | - Hong Liu
- Department of Ophthalmology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada,Lawson Health Research Institute, London, Ontario, Canada
| | - Cindy M. L. Hutnik
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada,Department of Ophthalmology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada,Ivey Eye Institute, St. Joseph's Health Care, London, Ontario, Canada,Lawson Health Research Institute, London, Ontario, Canada
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7
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Lee CC, Tsai CH, Chen CH, Yeh YC, Chung WH, Chen CB. An updated review of the immunological mechanisms of keloid scars. Front Immunol 2023; 14:1117630. [PMID: 37033989 PMCID: PMC10075205 DOI: 10.3389/fimmu.2023.1117630] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 03/07/2023] [Indexed: 04/11/2023] Open
Abstract
Keloid is a type of disfiguring pathological scarring unique to human skin. The disorder is characterized by excessive collagen deposition. Immune cell infiltration is a hallmark of both normal and pathological tissue repair. However, the immunopathological mechanisms of keloid remain unclear. Recent studies have uncovered the pivotal role of both innate and adaptive immunity in modulating the aberrant behavior of keloid fibroblasts. Several novel therapeutics attempting to restore regulation of the immune microenvironment have shown variable efficacy. We review the current understanding of keloid immunopathogenesis and highlight the potential roles of immune pathway-specific therapeutics.
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Affiliation(s)
- Chih-Chun Lee
- 1 Department of Medical Education, Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Chia-Hsuan Tsai
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Keelung, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chih-Hao Chen
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Keelung, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yuan-Chieh Yeh
- Department of Traditional Chinese Medicine, Chang Gung Memorial Hospital, Keelung, Taiwan
- Program in Molecular Medicine, College of Life Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Wen-Hung Chung
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Drug Hypersensitivity Clinical and Research Center, Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taiwan
- Drug Hypersensitivity Clinical and Research Center, Department of Dermatology, Chang Gung Memorial Hospital, Taipei, Taiwan
- Drug Hypersensitivity Clinical and Research Center, Department of Dermatology, Chang Gung Memorial Hospital, Keelung, Taiwan
- Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan
- Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Linkou, Taiwan
- Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China
- Xiamen Chang Gung Allergology Consortium, Xiamen Chang Gung Hospital, Xiamen, China
- Whole-Genome Research Core Laboratory of Human Diseases, Chang Gung Memorial Hospital, Keelung, Taiwan
- Immune-Oncology Center of Excellence, Chang Gung Memorial Hospital, Linkou, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Chun-Bing Chen
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Drug Hypersensitivity Clinical and Research Center, Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taiwan
- Drug Hypersensitivity Clinical and Research Center, Department of Dermatology, Chang Gung Memorial Hospital, Taipei, Taiwan
- Drug Hypersensitivity Clinical and Research Center, Department of Dermatology, Chang Gung Memorial Hospital, Keelung, Taiwan
- Cancer Vaccine and Immune Cell Therapy Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan
- Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Linkou, Taiwan
- Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China
- Xiamen Chang Gung Allergology Consortium, Xiamen Chang Gung Hospital, Xiamen, China
- Whole-Genome Research Core Laboratory of Human Diseases, Chang Gung Memorial Hospital, Keelung, Taiwan
- Immune-Oncology Center of Excellence, Chang Gung Memorial Hospital, Linkou, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan
- School of Medicine, National Tsing Hua University, Hsinchu, Taiwan
- *Correspondence: Chun-Bing Chen, ;
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Vargas-Alfredo N, Munar-Bestard M, Ramis JM, Monjo M. Synthesis and Modification of Gelatin Methacryloyl (GelMA) with Antibacterial Quaternary Groups and Its Potential for Periodontal Applications. Gels 2022; 8:630. [PMID: 36286131 PMCID: PMC9601335 DOI: 10.3390/gels8100630] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/27/2022] [Accepted: 10/03/2022] [Indexed: 09/02/2023] Open
Abstract
Gelatin methacryloyl (GelMA) hydrogels have been widely used for different biomedical applications due to their tunable physical characteristics and appropriate biological properties. In addition, GelMA could be modified with the addition of functional groups providing inherent antibacterial capabilities. Here, GelMA-based hydrogels were developed through the combination of a GelMA unmodified and modified polymer with quaternary ammonium groups (GelMAQ). The GelMAQ was synthesized from GelMA with a low degree of substitution of methacrylamide groups (DSMA) and grafted with glycidyltrimethylammonium chloride in the free amine groups of the lysine moieties present in the original gelatin. GelMAs with high DSMA and GelMAQ were combined 50/50% or 25/75% (w/w), respectively, and compared to controls GelMA and GelMA with added chlorhexidine (CHX) at 0.2%. The different hydrogels were characterized using 1H-NMR spectroscopy and swelling behavior and tested in (1) Porphyromonas gingivalis to evaluate their antibacterial properties and (2) human gingival fibroblast to evaluate their cell biocompatibility and regenerative properties. GelMA/GelMAQ 25/75% showed good antibacterial properties but also excellent biocompatibility and regenerative properties toward human fibroblasts in the wound healing assay. Taken together, these results suggest that the modification of GelMA with quaternary groups could facilitate periodontal tissue regeneration, with good biocompatibility and added antibacterial properties.
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Affiliation(s)
- Nelson Vargas-Alfredo
- Cell Therapy and Tissue Engineering Group, Department of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of the Balearic Islands, Ctra. Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
- Health Research Institute of the Balearic Islands (IdISBa), Ctra. Valldemossa 79, University Hospital Son Espases, Edificio S, 07120 Palma de Mallorca, Spain
| | - Marta Munar-Bestard
- Cell Therapy and Tissue Engineering Group, Department of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of the Balearic Islands, Ctra. Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
- Health Research Institute of the Balearic Islands (IdISBa), Ctra. Valldemossa 79, University Hospital Son Espases, Edificio S, 07120 Palma de Mallorca, Spain
| | - Joana Maria Ramis
- Cell Therapy and Tissue Engineering Group, Department of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of the Balearic Islands, Ctra. Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
- Health Research Institute of the Balearic Islands (IdISBa), Ctra. Valldemossa 79, University Hospital Son Espases, Edificio S, 07120 Palma de Mallorca, Spain
| | - Marta Monjo
- Cell Therapy and Tissue Engineering Group, Department of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of the Balearic Islands, Ctra. Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
- Health Research Institute of the Balearic Islands (IdISBa), Ctra. Valldemossa 79, University Hospital Son Espases, Edificio S, 07120 Palma de Mallorca, Spain
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Rao P, Qiao X, Hua W, Hu M, Tahan M, Chen T, Yu H, Ren X, Cao Q, Wang Y, Yang Y, Wang YM, Lee VW, Alexander SI, Harris DC, Zheng G. Promotion of β-Catenin/Forkhead Box Protein O Signaling Mediates Epithelial Repair in Kidney Injury. THE AMERICAN JOURNAL OF PATHOLOGY 2021; 191:993-1009. [PMID: 33753026 PMCID: PMC8351131 DOI: 10.1016/j.ajpath.2021.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 03/01/2021] [Accepted: 03/05/2021] [Indexed: 01/24/2023]
Abstract
Fibrosis is characterized by progressively excessive deposition of matrix components and may lead to organ failure. Transforming growth factor-β (TGF-β) is a key cytokine involved in tissue repair and fibrosis. TGF-β's profibrotic signaling pathways converge at activation of β-catenin. β-Catenin is an important transcription cofactor whose function depends on its binding partner. Promoting β-catenin binding to forkhead box protein O (Foxo) via inhibition of its binding to T-cell factor (TCF) reduces kidney fibrosis in experimental murine models. Herein, we investigated whether β-catenin/Foxo diverts TGF-β signaling from profibrotic to physiological epithelial healing. In an in vitro model of wound healing (scratch assay), and in an in vivo model of kidney injury, unilateral renal ischemia reperfusion, TGF-β treatment in combination with either ICG-001 or iCRT3 (β-catenin/TCF inhibitors) increased β-catenin/Foxo interaction, increased scratch closure by increased cell proliferation and migration, reduced the TGF-β-induced mesenchymal differentiation, and healed the ischemia reperfusion injury with less fibrosis. In addition, administration of ICG-001 or iCRT3 reduced the contractile activity induced by TGF-β in C1.1 cells. Together, our results indicate that redirection of β-catenin binding from TCF to Foxo promotes β-catenin/Foxo-mediated epithelial repair. Targeting β-catenin/Foxo may rebuild normal structure of injured kidney.
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Affiliation(s)
- Padmashree Rao
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Xi Qiao
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia; Department of Nephrology, Shanxi Medical University, Taiyuan, China
| | - Winston Hua
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Min Hu
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Mariah Tahan
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Titi Chen
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Hong Yu
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Xiaojun Ren
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia; Department of Nephrology, Shanxi Medical University, Taiyuan, China
| | - Qi Cao
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Yiping Wang
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Ying Yang
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia; Department of Nephrology, Shanxi Medical University, Taiyuan, China
| | - Yuan M Wang
- Centre for Kidney Research Children's Hospital at Westmead, Australia
| | - Vincent W Lee
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia; Department of Nephrology, Westmead Hospital, Australia
| | | | - David C Harris
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia; Department of Nephrology, Westmead Hospital, Australia
| | - Guoping Zheng
- Centre for Transplant and Renal Research, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia.
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10
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Lee AJ, Mahoney CM, Cai CC, Ichinose R, Stefani RM, Marra KG, Ateshian GA, Shah RP, Vunjak-Novakovic G, Hung CT. Sustained Delivery of SB-431542, a Type I Transforming Growth Factor Beta-1 Receptor Inhibitor, to Prevent Arthrofibrosis. Tissue Eng Part A 2021; 27:1411-1421. [PMID: 33752445 DOI: 10.1089/ten.tea.2021.0029] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Fibrosis of the knee is a common disorder resulting from an aberrant wound healing response and is characterized by extracellular matrix deposition, joint contraction, and scar tissue formation. The principal regulator of the fibrotic cascade is transforming growth factor beta-1 (TGF-β1), a factor that induces rapid proliferation and differentiation of resident fibroblasts. In this study, we demonstrate successful inhibition of TGF-β1-driven myofibroblastic differentiation in human fibroblast-like synoviocytes using a small molecule TGF-β1 receptor inhibitor, SB-431542. We also demonstrate successful encapsulation of SB-431542 in poly(D,L-lactide-co-glycolide) (PLGA) as a potential prophylactic treatment for arthrofibrosis and characterize drug release and bioactivity in a three-dimensional collagen gel contraction assay. We assessed the effects of TGF-β1 and SB-431542 on cell proliferation and viability in monolayer cultures. Opposing dose-dependent trends were observed in cell proliferation, which increased in TGF-β1-treated cultures and decreased in SB-431542-treated cultures relative to control (p < 0.05). SB-431542 was not cytotoxic at the concentrations studied (0-50 μM) and inhibited TGF-β1-induced collagen gel contraction in a dose-dependent manner. Specifically, TGF-β1-treated gels contracted to 18% ± 1% of their initial surface area, while gels treated with TGF-β1 and ≥10 μM SB-431542 showed no evidence of contraction (p < 0.0001). Upon removal of the compound, all gels contracted to control levels after 44 h in culture, necessitating sustained delivery for prolonged inhibition. To this end, SB-431542 was encapsulated in PLGA microspheres (SBMS) that had an average diameter of 87.5 ± 24 μm and a loading capacity of 4.3 μg SB-431542 per milligram of SBMS. Functional assessment of SBMS revealed sustained inhibition of TGF-β1-induced gel contraction as well as hallmark features of myofibroblastic differentiation, including α-smooth muscle actin expression and connective tissue growth factor production. These results suggest that SB-431542 may be used to counter TGF-β1-driven events in the fibrotic cascade in the knee cartilage.
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Affiliation(s)
- Andy J Lee
- Department of Biomedical Engineering, Columbia University, New York, New York, USA
| | - Christopher M Mahoney
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Charles C Cai
- Department of Biomedical Engineering, Columbia University, New York, New York, USA
| | - Rika Ichinose
- Department of Biomedical Engineering, Columbia University, New York, New York, USA
| | - Robert M Stefani
- Department of Biomedical Engineering, Columbia University, New York, New York, USA
| | - Kacey G Marra
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Gerard A Ateshian
- Department of Biomedical Engineering, Columbia University, New York, New York, USA.,Department of Mechanical Engineering, Columbia University, New York, New York, USA
| | - Roshan P Shah
- Department of Orthopaedic Surgery, and Columbia University, New York, New York, USA
| | - Gordana Vunjak-Novakovic
- Department of Biomedical Engineering, Columbia University, New York, New York, USA.,Department of Medicine, Columbia University, New York, New York, USA
| | - Clark T Hung
- Department of Biomedical Engineering, Columbia University, New York, New York, USA.,Department of Orthopaedic Surgery, and Columbia University, New York, New York, USA
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11
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Regeneration of Dermis: Scarring and Cells Involved. Cells 2019; 8:cells8060607. [PMID: 31216669 PMCID: PMC6627856 DOI: 10.3390/cells8060607] [Citation(s) in RCA: 174] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/12/2019] [Accepted: 06/15/2019] [Indexed: 12/31/2022] Open
Abstract
There are many studies on certain skin cell specifications and their contribution to wound healing. In this review, we provide an overview of dermal cell heterogeneity and their participation in skin repair, scar formation, and in the composition of skin substitutes. The papillary, reticular, and hair follicle associated fibroblasts differ not only topographically, but also functionally. Human skin has a number of particular characteristics that are different from murine skin. This should be taken into account in experimental procedures. Dermal cells react differently to skin wounding, remodel the extracellular matrix in their own manner, and convert to myofibroblasts to different extents. Recent studies indicate a special role of papillary fibroblasts in the favorable outcome of wound healing and epithelial-mesenchyme interactions. Neofolliculogenesis can substantially reduce scarring. The role of hair follicle mesenchyme cells in skin repair and possible therapeutic applications is discussed. Participation of dermal cell types in wound healing is described, with the addition of possible mechanisms underlying different outcomes in embryonic and adult tissues in the context of cell population characteristics and extracellular matrix composition and properties. Dermal white adipose tissue involvement in wound healing is also overviewed. Characteristics of myofibroblasts and their activity in scar formation is extensively discussed. Cellular mechanisms of scarring and possible ways for its prevention are highlighted. Data on keloid cells are provided with emphasis on their specific characteristics. We also discuss the contribution of tissue tension to the scar formation as well as the criteria and effectiveness of skin substitutes in skin reconstruction. Special attention is given to the properties of skin substitutes in terms of cell composition and the ability to prevent scarring.
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12
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3D modeling of keloid scars in vitro by cell and tissue engineering. Arch Dermatol Res 2016; 309:55-62. [PMID: 27942931 DOI: 10.1007/s00403-016-1703-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 11/17/2016] [Accepted: 11/28/2016] [Indexed: 10/20/2022]
Abstract
Keloids are pathologic scars defined as dermal fibrotic tumors resulting from a disturbance of skin wound healing process. Treatments against keloids are multiple, sometimes empirical and none of them really provides an effective tool for physicians. The lack of effective treatments is correlated with the poor understanding of keloid pathogenesis. To fill this gap, researchers need strong models mimicking keloids as closely as possible. The objective of this study was to establish in vitro a new reconstructed keloid model (RKM), by combining fibroblasts extracted from the three major area of a keloid (center, periphery, non-lesional) in a three-dimensional biomaterial. To this aim, fibroblasts of three keloid locations were extracted and characterized, and then integrated in a hydrated collagen gel matrix during a three-step procedure. The heterogeneity of fibroblasts was assessed according to their proliferative and remodeling capacities. RKMs were further visualized and characterized by both light and scanning electron microscopy. This reconstructed keloid model should be very useful for investigating keloid fibroblasts function in conditions mimicking in vivo situation. Moreover, RKM should also be a suitable model for either drug study and discovery or innovative approaches using medical devices both during cancer and cancer-like disease investigation.
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13
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Roach KM, Feghali-Bostwick CA, Amrani Y, Bradding P. Lipoxin A4 Attenuates Constitutive and TGF-β1-Dependent Profibrotic Activity in Human Lung Myofibroblasts. THE JOURNAL OF IMMUNOLOGY 2015; 195:2852-60. [PMID: 26276873 PMCID: PMC4560490 DOI: 10.4049/jimmunol.1500936] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 07/19/2015] [Indexed: 12/19/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a common, progressive, and invariably lethal interstitial lung disease with no effective therapy. The key cell driving the development of fibrosis is the myofibroblast. Lipoxin A4 (LXA4) is an anti-inflammatory lipid, important in the resolution of inflammation, and it has potential antifibrotic activity. However, the effects of LXA4 on primary human lung myofibroblasts (HLMFs) have not previously been investigated. Therefore, the aim of this study was to examine the effects of LXA4 on TGF-β1–dependent responses in IPF- and nonfibrotic control (NFC)–derived HLMFs. HLMFs were isolated from IPF and NFC patients and grown in vitro. The effects of LXA4 on HLMF proliferation, collagen secretion, α-smooth muscle actin (αSMA) expression, and Smad2/3 activation were examined constitutively and following TGF-β1 stimulation. The LXA4 receptor (ALXR) was expressed in both NFC- and IPF-derived HLMFs. LXA4 (10−10 and 10−8 mol) reduced constitutive αSMA expression, actin stress fiber formation, contraction, and nuclear Smad2/3, indicating regression from a myofibroblast to fibroblast phenotype. LXA4 also significantly inhibited FBS-dependent proliferation and TGF-β1–dependent collagen secretion, αSMA expression, and Smad2/3 nuclear translocation in IPF-derived HLMFs. LXA4 did not inhibit Smad2/3 phosphorylation. In summary, LXA4 attenuated profibrotic HLMF activity and promoted HLMF regression to a quiescent fibroblast phenotype. LXA4 or its stable analogs delivered by aerosol may offer a novel approach to the treatment of IPF.
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Affiliation(s)
- Katy M Roach
- Department of Infection, Immunity and Inflammation, Institute for Lung Health, University of Leicester, Leicester LE1 7RH, United Kingdom; and
| | - Carol A Feghali-Bostwick
- Division of Rheumatology and Immunology, Department of Medicine, University of South Carolina, Columbia, SC 29208
| | - Yassine Amrani
- Department of Infection, Immunity and Inflammation, Institute for Lung Health, University of Leicester, Leicester LE1 7RH, United Kingdom; and
| | - Peter Bradding
- Department of Infection, Immunity and Inflammation, Institute for Lung Health, University of Leicester, Leicester LE1 7RH, United Kingdom; and
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14
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Igarashi J, Fukuda N, Inoue T, Nakai S, Saito K, Fujiwara K, Matsuda H, Ueno T, Matsumoto Y, Watanabe T, Nagase H, Bando T, Sugiyama H, Itoh T, Soma M. Preclinical Study of Novel Gene Silencer Pyrrole-Imidazole Polyamide Targeting Human TGF-β1 Promoter for Hypertrophic Scars in a Common Marmoset Primate Model. PLoS One 2015; 10:e0125295. [PMID: 25938472 PMCID: PMC4418757 DOI: 10.1371/journal.pone.0125295] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Accepted: 03/09/2015] [Indexed: 11/18/2022] Open
Abstract
We report a preclinical study of a pyrrole-imidazole (PI) polyamide that targets the human transforming growth factor (hTGF)-β1 gene as a novel transcriptional gene silencer in a common marmoset primate model. We designed and then synthesized PI polyamides to target the hTGF-β1 promoter. We examined effects of seven PI polyamides (GB1101-1107) on the expression of hTGF-β1 mRNA stimulated with phorbol 12-myristate 13-acetate (PMA) in human vascular smooth muscle cells. GB1101, GB1105 and GB1106 significantly inhibited hTGF-β1 mRNA expression. We examined GB1101 as a PI polyamide to hTGF-β1 for hypertrophic scars in marmosets in vivo. Injection of GB1101 completely inhibited hypertrophic scar formation at 35 days post-incision and inhibited cellular infiltration, TGF-β1 and vimentin staining, and epidermal thickness. Mismatch polyamide did not affect hypertrophic scarring or histological changes. Epidermis was significantly thinner with GB1101 than with water and mismatch PI polyamides. We developed the PI polyamides for practical ointment medicines for the treatment of hypertrophic scars. FITC-labeled GB1101 with solbase most efficiently distributed in the nuclei of epidermal keratinocytes, completely suppressed hypertropic scarring at 42 days after incision, and considerably inhibited epidermal thickness and vimentin-positive fibroblasts. PI polyamides targeting hTGF-β1 promoter with solbase ointment will be practical medicines for treating hypertrophic scars after surgical operations and skin burns.
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Affiliation(s)
- Jun Igarashi
- Department of General Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Noboru Fukuda
- Division of Life Science, Advanced Research Institute for the Sciences and Humanities, Nihon University Graduate School, Tokyo, Japan
- Division of Nephrology Hypertension and Endocrinology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
- * E-mail:
| | - Takashi Inoue
- Marmoset Research Department, Central Institute for Experimental Animals, Kanagawa, Japan
| | - Shigeki Nakai
- Department of General Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Kosuke Saito
- Department of General Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Kyoko Fujiwara
- Department of General Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Hiroyuki Matsuda
- Department of General Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Takahiro Ueno
- Division of Nephrology Hypertension and Endocrinology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Yoshiaki Matsumoto
- Department of Clinical Pharmacokinetics, College of Pharmacy, Nihon University, Chiba, Japan
| | - Takayoshi Watanabe
- Department of Cancer Genetics, Chiba Cancer Center Research Institute, Chiba, Japan
| | - Hiroki Nagase
- Department of Cancer Genetics, Chiba Cancer Center Research Institute, Chiba, Japan
| | - Toshikazu Bando
- Department of Chemistry, Kyoto University Graduate School, Kyoto, Japan
| | - Hiroshi Sugiyama
- Department of Chemistry, Kyoto University Graduate School, Kyoto, Japan
| | - Toshio Itoh
- Marmoset Research Department, Central Institute for Experimental Animals, Kanagawa, Japan
| | - Masayoshi Soma
- Department of General Medicine, Nihon University School of Medicine, Tokyo, Japan
- Division of Nephrology Hypertension and Endocrinology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan
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15
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Hirokawa S, Shimanuki T, Kitajima H, Nishimori Y, Shimosaka M. Knockdown of electron transfer flavoprotein β subunit reduced TGF-β-induced α-SMA mRNA expression but not COL1A1 in fibroblast-populated three-dimensional collagen gel cultures. J Dermatol Sci 2012; 68:179-86. [DOI: 10.1016/j.jdermsci.2012.09.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 08/22/2012] [Accepted: 09/16/2012] [Indexed: 12/31/2022]
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16
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Kim JS, Choi IG, Lee BC, Park JB, Kim JH, Jeong JH, Jeong JH, Seo CH. Neuregulin induces CTGF expression in hypertrophic scarring fibroblasts. Mol Cell Biochem 2012; 365:181-9. [DOI: 10.1007/s11010-012-1258-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 02/07/2012] [Indexed: 01/22/2023]
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17
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Transcriptional inhibition of hypertrophic scars by a gene silencer, pyrrole-imidazole polyamide, targeting the TGF-β1 promoter. J Invest Dermatol 2011; 131:1987-95. [PMID: 21654833 DOI: 10.1038/jid.2011.150] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Synthetic pyrrole-imidazole (PI) polyamides bind to the minor groove of double-helical DNA with high affinity and specificity, and inhibit the transcription of corresponding genes. We examined the effects of a transforming growth factor (TGF)-β1-targeted PI polyamide (Polyamide) on hypertrophic skin scars in rats. Hypertrophic scars were created dorsally in rats by incisions. FITC-labeled Polyamide was injected to investigate its distribution in the skin. Expression of TGF-β1, connective tissue growth factor (CTGF), collagen type1, and fibronectin mRNAs was evaluated by reverse transcription PCR analysis. The extent of fibrosis and the expression of TGF-β1 were evaluated histologically and immunohistochemically. Polyamide was distributed in almost all nuclei of skin cells. Expression of TGF-β1 mRNA reached a peak at 3 days after skin incision. Expression of CTGF and extracellular matrix mRNAs was increased continuously even after the peak induction of TGF-β1 mRNA. Injection of Polyamide completely inhibited both the development of scars and the induction of growth factors and extracellular matrix mRNAs. The treatment also markedly inhibited fibrotic changes and reduced the numbers of vimentin-positive spindle-shaped fibroblasts. Injection of Polyamide also reduced established hypertrophic scars in rats. Thus, TGF-β1-targeted PI polyamide should be a feasible gene silencer for hypertrophic scars and keloids.
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18
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Uppanan P, Channasanon S, Veeranondh S, Tanodekaew S. Synthesis of GTMAC modified chitin-PAA gel and evaluation of its biological properties. J Biomed Mater Res A 2011; 98:185-91. [PMID: 21548069 DOI: 10.1002/jbm.a.33104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 03/01/2011] [Accepted: 03/09/2011] [Indexed: 11/07/2022]
Abstract
The dressing prepared from GTMAC modified chitin-PAA was introduced with the aim of facilitating wound healing, particularly those effectively absorbing exudates, maintaining a moist wound environment and controlling bacterial proliferation. Chitin was chemically modified with acrylic acid to encourage a moist wound healing environment. The highly water-absorbable resulting product (chitin-PAA) was further reacted with glycidyltrimethylammonium chloride (GTMAC) to impart antibacterial activities. The final product, chitin-PAA-GTMAC was characterized by the techniques of Fourier Transform Infrared (FTIR), solid state (15) N NMR, and elemental analysis. Their cytotoxicity and antibacterial activities against S. epidermidis and E. coli were evaluated which found increasing effects in those properties with increasing degree substitution of GTMAC. All materials also showed good blood-clotting ability. The collagen gel contraction assay was used to analyze the behavior of fibroblasts after contact with the gels. The extent of the gel contraction as well as the examination of the secreted interleukin-8 (IL-8) and transforming growth factor-β1 (TGF-β1) were investigated. The results showed that chitin-PAA modified with GTMAC could stimulate the production of IL-8, but TGF-β1. Fibroblasts presented normal spreading and formation of cellular processes in the collagen gels with all of the modifications. Furthermore, all modified gels except for the highest GTMAC content gel [chitin-PAA-GTMAC (1:20)] were found a greater extent in gel contraction than the unmodified chitin-PAA. It suggested the promoting effect of GTMAC on cell proliferation if the GTMAC content in the gel was not too high, that is, the mole ratio of glucosamine to GTMAC of the gel should not greater than 1:10.
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Affiliation(s)
- Paweena Uppanan
- National Metal and Materials Technology Center, 114 Thailand Science Park, Paholyothin Rd, Klong 1, Klong Luang, Pathumthani 12120, Thailand
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19
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Mordasky Markell L, Pérez-Lorenzo R, Masiuk KE, Kennett MJ, Glick AB. Use of a TGFbeta type I receptor inhibitor in mouse skin carcinogenesis reveals a dual role for TGFbeta signaling in tumor promotion and progression. Carcinogenesis 2010; 31:2127-35. [PMID: 20852150 DOI: 10.1093/carcin/bgq191] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Pharmacological inhibitors of the transforming growth factor β (TGFβ) type I receptor (ALK5) have shown promise in blocking growth of xenotransplanted cancer cell lines but the effect on a multistage cancer model is not known. To test this, we treated mouse skin with SB431542 (SB), a well-characterized ALK5 inhibitor, during a two-stage skin carcinogenesis assay. Topical SB significantly reduced the total number, incidence and size of papillomas compared with 12-O-tetradecanoylphorbol 13-acetate (TPA) promotion alone, and this was linked to increased epidermal apoptosis, decreased proliferation and decreased cutaneous inflammation during promotion. In contrast, the frequency of conversion to squamous cell carcinoma (SCC) was 2-fold higher in papillomas treated with SB. Although there was no difference in tumor cell proliferation in early premalignant lesions, those that formed after SB treatment exhibited reduced squamous differentiation and an altered inflammatory microenvironment similar to SCC. In an inducible epidermal RAS transgenic model, treatment with SB enhanced proliferation and cutaneous inflammation in skin but decreased expression of keratin 1 and increased expression of simple epithelial keratin 18, markers of premalignant progression. In agreement with increased frequency of progression in the multistage model, SB treatment resulted in increased tumor formation with a more malignant phenotype following long-term RAS induction. In contrast to the current paradigm for TGFβ in carcinogenesis, these results demonstrate that cutaneous TGFβ signaling enables promotion of benign tumors but suppresses premalignant progression through context-dependent regulation of epidermal homeostasis and inflammation.
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Affiliation(s)
- Lauren Mordasky Markell
- Department of Veterinary and Biomedical Sciences, The Center for Molecular Toxicology and Carcinogenesis, Pennsylvania State University, University Park, PA 16802, USA
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20
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Jeong MJ, Kim CS, Park JC, Kim HJ, Ko YM, Park KJ, Jeong SJ, Endou H, Kanai Y, Lim DS, Kim DK. Differential expression of system L amino acid transporters during wound healing process in the skin of young and old rats. Biol Pharm Bull 2008; 31:395-9. [PMID: 18310899 DOI: 10.1248/bpb.31.395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
UNLABELLED In order to elucidate the role of the system L-type amino acid transporters (LATs) in the wound healing process of aged and young subjects, we investigated the expression of LAT1, LAT2 and their subunit 4F2hc in the skin healing process after artificial wounds of dorsal skin in the young and old rats. METHODS The 1 cm full-thickness incisional wounds were made through the skin and panniculus carnosus muscle. The wounds were harvested at days 1, 3, 5 and 7 post-wounding, the experimental controls were harvested the skin of rat without wounds and the various analyses were performed. RESULTS In young rats, gradually and noticeable wound healing was detected, however, in old rats, wound healing was found to be greatly delayed. In young rats, the expression of LAT1 was increased rapidly on the day 1 after wound induction, on the other hand, in old rats, the expression of LAT1 after wound induction was not different from the control group. In young rats, the expression of LAT2 after the induction of wound was not different from the control group, however in old rats, the expression of LAT2 on the day 1 of wound induction was rapidly elevated. CONCLUSION These results suggest that the LAT1 and LAT2 increase in the wound healing process after cell injury in young and old rats, respectively.
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Affiliation(s)
- Moon-Jin Jeong
- Oral Biology Research Institute and The Second Stage of BK21, Chosun University College of Dentistry, 375 Seosukdong, Dong-gu, Gwangju 501-759, Korea
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21
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Hasegawa T, Sumiyoshi K, Tsuchihashi H, Ikeda S, Nakao A, Ogawa H. FK506 inhibits the enhancing effects of TGF-β on wound healing in a rabbit dermal ulcer model. J Dermatol Sci 2007; 47:37-40. [PMID: 17416487 DOI: 10.1016/j.jdermsci.2007.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2006] [Revised: 02/14/2007] [Accepted: 03/04/2007] [Indexed: 11/29/2022]
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22
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Sandulache VC, Parekh A, Li-Korotky H, Dohar JE, Hebda PA. Prostaglandin E2 inhibition of keloid fibroblast migration, contraction, and transforming growth factor (TGF)-beta1-induced collagen synthesis. Wound Repair Regen 2007; 15:122-33. [PMID: 17244328 DOI: 10.1111/j.1524-475x.2006.00193.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Keloid formation has been linked to aberrant fibroblast activity, exacerbated by growth factors and inflammatory mediators. Prostaglandin E2 (PGE2), synthesized from arachidonic acid by cyclooxygenases (COX) and synthases (PGES), acts as both an inflammatory mediator and fibroblast modulator. Although PGE2 has known antifibrotic effects in the lower airway, its role in dermal fibrosis in general, and keloid formation in particular, remains unclear. This study focused on: (1) the effects of PGE2 on keloid fibroblast migration, contraction, and collagen synthesis and (2) endogenous PGE2 synthesis in response interleukin-1beta. PGE2 decreased keloid fibroblast migration and contraction via an EP2/EP4-cAMP mechanism that disrupted actin cytoskeletal dynamics and reversed transforming growth factor-beta1-induced collagen I and III synthesis. Impaired fibroblast PGE2 production has been linked to lower airway fibrosis and recently to keloid formation. Here, we showed that interleukin-1beta stimulation leads to nuclear factor-kappaB translocation to the nucleus, resulting in up-regulation of COX-2 and microsomal PGE2 synthase 1. Up-regulation of COX-2 in, and secretion of PGE2 by keloid fibroblasts are diminished compared with their normal fibroblast counterparts. We suggest that the antifibrotic effects of PGE2 during keloid formation are potentially diminished due to aberrant paracrine fibroblast signaling. Exogenous PGE2 may supplement decreased endogenous levels and inhibit keloid formation or progression.
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Affiliation(s)
- Vlad C Sandulache
- Division of Pediatric Otolaryngology, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
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