1
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Kuang LW, Zhang CC, Li BH, Liu HZ, Wang H, Li GC. Identification of the MALAT1/miR-106a-5p/ZNF148 feedback loop in regulating HaCaT cell proliferation, migration and apoptosis. Regen Med 2023; 18:239-258. [PMID: 36710662 DOI: 10.2217/rme-2022-0189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Aims: This study aims to investigate the function of positive feedback loops involving noncoding RNA in diabetic wound healing. Methods: We developed a mouse diabetic wound model to confirm that hyperglycemia can impair wound healing. We also used an in vitro keratinocyte model in high-glucose conditions to investigate the mechanism of delayed wound healing. Results: MALAT1 was decreased in diabetic mouse wound tissue and can promote keratinocyte biological functions. MALAT1 could bind to miR-106a-5p to modulate the expression of ZNF148, a target gene of miR-106a-5p. Surprisingly, ZNF148 bound to a region in the MALAT1 promoter to stimulate gene expression. Conclusion: ZNF148-activated MALAT1 increases ZNF148 expression by competitively binding miR-106a-3p, generating a positive feedback loop that enhances keratinocyte function.
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Affiliation(s)
- Li-Wen Kuang
- Department of Wound Repair Surgery, Liyuan Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei Province, 430062, PR China
| | - Chen-Chen Zhang
- Department of Wound Repair Surgery, Liyuan Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei Province, 430062, PR China
| | - Bing-Hui Li
- Department of Wound Repair Surgery, Liyuan Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei Province, 430062, PR China
| | - Hui-Zhen Liu
- Department of Wound Repair Surgery, Liyuan Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei Province, 430062, PR China
| | - Hui Wang
- Department of Wound Repair Surgery, Liyuan Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei Province, 430062, PR China
| | - Gong-Chi Li
- Department of Hand Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei Province, 430022, PR China
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2
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Anker AM, Lenhard J, Klein SM, Felthaus O, Prantl L, Ruewe M. Standard doses of Triamcinolone do not affect fibroblast cell migration of abdominoplasty patients in-vitro1. Clin Hemorheol Microcirc 2023; 85:307-314. [PMID: 36502314 DOI: 10.3233/ch-229106] [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] [Indexed: 12/12/2022]
Abstract
BACKGROUND Recent studies have demonstrated that local application of corticosteroids reduces wound exudation following abdominoplasty and other reconstructive surgical procedures. On the other hand, corticosteroids might provoke wound healing disturbances due to their immunosuppressive effects. OBJECTIVE The main objective of this study was to gain further information about the impact of the corticosteroid triamcinolone on cell migration in abdominoplasty patients. METHODS An in-vitro scratch assay wound healing model was applied to observe cell migration of fibroblasts cultured with nutrient medium containing human seroma aspirate±triamcinolone. RESULTS There were no significant differences regarding cell migration when fibroblasts were incubated with triamcinolone + seroma containing culture medium compared to seroma containing culture medium without triamcinolone. CONCLUSIONS The performed in-vitro study suggests that triamcinolone does not decelerate fibroblast cell migration which is considered as a surrogate of wound healing.
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Affiliation(s)
- Alexandra M Anker
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Regensburg and Caritas Hospital St. Josef Regensburg, Regensburg, Germany
| | - Jasmin Lenhard
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Regensburg and Caritas Hospital St. Josef Regensburg, Regensburg, Germany
| | - Silvan M Klein
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Regensburg and Caritas Hospital St. Josef Regensburg, Regensburg, Germany
| | - Oliver Felthaus
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Regensburg and Caritas Hospital St. Josef Regensburg, Regensburg, Germany
| | - Lukas Prantl
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Regensburg and Caritas Hospital St. Josef Regensburg, Regensburg, Germany
| | - Marc Ruewe
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Regensburg and Caritas Hospital St. Josef Regensburg, Regensburg, Germany
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3
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Kashyap MP, Khan J, Sinha R, Jin L, Atigadda V, Deshane JS, Ahmed AR, Kilic A, Raman C, Mukhtar MS, Elmets CA, Athar M. Advances in molecular pathogenesis of hidradenitis suppurativa: Dysregulated keratins and ECM signaling. Semin Cell Dev Biol 2022; 128:120-129. [PMID: 35131152 PMCID: PMC9232849 DOI: 10.1016/j.semcdb.2022.01.006] [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: 09/10/2021] [Revised: 01/12/2022] [Accepted: 01/14/2022] [Indexed: 12/12/2022]
Abstract
Hidradenitis suppurativa (HS) is characterized by deep-seated, highly inflamed, and painful lumps/abscesses, fistulae, and sinus tracts that grow extensively deep in the dermis and are highly immunogenic in nature. In about one-third of the HS patients there is strong evidence for the role of γ-secretase mutations along with dysregulated Notch signaling. However, the contribution of dysregulated Notch signaling in HS pathogenesis in relation to hair follicle alterations and hyper-activation of the immune system remains undefined. A genome-wide association study (GWAS), proteomic data and functional investigations of identified sequence variants in HS pathology are not fully revealing. The disease initiation or progression may involve bacterial infection besides intrinsic functional defects in keratinocytes, which may be key to further exacerbate immune cell infiltration and cytokine production in and around the lesional tissue. The absence of a suitable animal model that could fully recapitulate the pathogenesis of HS is a major impediment for proper understanding the underlying mechanisms and development of effective treatments. The presence of extracellular matrix (ECM) degradation products along with dysregulation in keratinocytes and, dermal fibroblasts ultimately affect immune regulation and are various components of HS pathogenesis. Bacterial infection further exacerbates the complexity of the disease progression. While anti-TNFα therapy shows partial efficacy, treatment to cure HS is absent. Multiple clinical trials targeting various cytokines, complement C5a and ECM products are in progress. This review provides state-of-the-art information on these aspects with a focus on dysregulated keratinocyte and immune cells; and role of ECM, and Keratin functions in this regard.
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Affiliation(s)
- Mahendra Pratap Kashyap
- UAB Research Center of Excellence in Arsenicals, Department of Dermatology, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Jasim Khan
- UAB Research Center of Excellence in Arsenicals, Department of Dermatology, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Rajesh Sinha
- UAB Research Center of Excellence in Arsenicals, Department of Dermatology, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Lin Jin
- UAB Research Center of Excellence in Arsenicals, Department of Dermatology, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Venkatram Atigadda
- UAB Research Center of Excellence in Arsenicals, Department of Dermatology, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Jessy S Deshane
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Ayesha R Ahmed
- Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, WA 99202, USA
| | - Ali Kilic
- Division of Plastic Surgery, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Chander Raman
- UAB Research Center of Excellence in Arsenicals, Department of Dermatology, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - M Shahid Mukhtar
- Department of Biology, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Craig A Elmets
- UAB Research Center of Excellence in Arsenicals, Department of Dermatology, University of Alabama at Birmingham, Birmingham AL35294, USA
| | - Mohammad Athar
- UAB Research Center of Excellence in Arsenicals, Department of Dermatology, University of Alabama at Birmingham, Birmingham AL35294, USA.
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Tayem R, Niemann C, Pesch M, Morgner J, Niessen CM, Wickström SA, Aumailley M. Laminin 332 Is Indispensable for Homeostatic Epidermal Differentiation Programs. J Invest Dermatol 2021; 141:2602-2610.e3. [PMID: 33965403 DOI: 10.1016/j.jid.2021.04.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 03/24/2021] [Accepted: 04/13/2021] [Indexed: 12/16/2022]
Abstract
The skin epidermis is attached to the underlying dermis by a laminin 332 (Lm332)-rich basement membrane. Consequently, loss of Lm332 leads to the severe blistering disorder epidermolysis bullosa junctionalis in humans and animals. Owing to the indispensable role of Lm332 in keratinocyte adhesion in vivo, the severity of the disease has limited research into other functions of the protein. We have conditionally disrupted Lm332 expression in basal keratinocytes of adult mice. Although blisters develop along the interfollicular epidermis, hair follicle basal cells provide sufficient anchorage of the epidermis to the dermis, making inducible deletion of the Lama3 gene compatible with life. Loss of Lm332 promoted the thickening of the epidermis and exaggerated desquamation. Global RNA expression analysis revealed major changes in the expression of keratins, cornified envelope proteins, and cellular stress markers. These modifications of the keratinocyte genetic program are accompanied by changes in cell shape and disorganization of the actin cytoskeleton. These data indicate that loss of Lm332-mediated progenitor cell adhesion alters cell fate and disturbs epidermal homeostasis.
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Affiliation(s)
- Raneem Tayem
- Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Catherin Niemann
- Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany; Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Monika Pesch
- Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Jessica Morgner
- Paul Gerson Unna Group 'Skin Homeostasis and Ageing', Max Planck Institute for Biology of Ageing, Cologne, Germany; Division of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Carien M Niessen
- Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany; Medical Faculty, Department of Cell Biology of the Skin, University of Cologne, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Sara A Wickström
- Paul Gerson Unna Group 'Skin Homeostasis and Ageing', Max Planck Institute for Biology of Ageing, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany; Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland; Wihuri Research Institute, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
| | - Monique Aumailley
- Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany.
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5
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Hegde A, Ananthan ASHP, Kashyap C, Ghosh S. Wound Healing by Keratinocytes: A Cytoskeletal Perspective. J Indian Inst Sci 2021. [DOI: 10.1007/s41745-020-00219-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Hou B, Qi M, Sun J, Ai M, Ma X, Cai W, Zhou Y, Ni L, Hu J, Xu F, Qiu L. Preparation, characterization and wound healing effect of vaccarin-chitosan nanoparticles. Int J Biol Macromol 2020; 165:3169-3179. [PMID: 33122060 DOI: 10.1016/j.ijbiomac.2020.10.182] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/16/2020] [Accepted: 10/22/2020] [Indexed: 12/19/2022]
Abstract
Wound healing is a complex, dynamic and difficult process. Much effort and attempt has been made to accelerate this process. The purpose of this study is to prepare nanoparticles loaded with vaccarin (VAC-NPS)hydrogel and evaluate its effect on promoting wound healing. In the present study, the physicochemical properties of VAC-NPS were characterized. Transmission electron microscopy (TEM) was used to observe the morphology of VAC-NPS. Human umbilical vein endothelial cells (HUVEC) was employed to assessment the biocompatibility of VAC-NPS in vitro. The wound healing function of VAC-NPS hydrogels was evaluated in the full-thickness dermal wound in a rat model. The results indicated that VAC-NPS was spherical like particles with uniform particle size distribution and no obvious aggregation with a diameter of (216.6 ± 10.1)nm. The loading capacity and encapsulation efficiency of VAC in the nanoparticles were (14.3 ± 1.2) % and (51.7 ± 1.7) % respectively. MTT assay demonstrated that the VAC-NPS had no cytotoxicity and could promote HUVEC proliferation and migration. In vivo results showed that VAC-NPS promotes wound healing, and the mechanism may be through up-regulating IL-1β and PDGF-BB, promoting angiogenesis. VAC-NPS might have a potential application value for the treatment of the wound healing and a promising performance in bio-medically relevant systems.
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Affiliation(s)
- Bao Hou
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Mengting Qi
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Jiangnan Sun
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Min Ai
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Xinyu Ma
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Weiwei Cai
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Yuetao Zhou
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Lulu Ni
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Jing Hu
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Fei Xu
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China
| | - Liying Qiu
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, PR China.
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7
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Mistry K, van der Steen B, Clifford T, van Holthoon F, Kleinnijenhuis A, Prawitt J, Labus M, Vanhoecke B, Lovat PE, McConnell A. Potentiating cutaneous wound healing in young and aged skin with nutraceutical collagen peptides. Clin Exp Dermatol 2020; 46:109-117. [PMID: 32687652 DOI: 10.1111/ced.14392] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Chronic wounds continue to be a burden to healthcare systems, with ageing linked to increased prevalence of chronic wound development. Nutraceutical collagen peptides have been shown to reduce signs of skin ageing, but their therapeutic potential for cutaneous wound healing remains undefined. AIM To determine the potential for nutraceutical collagen peptides to promote cutaneous wound healing in vitro in the context of age. METHODS The potential for bovine- or porcine-derived nutraceutical collagen peptides to promote wound healing of primary cutaneous fibroblasts and keratinocytes derived from young and aged individuals in vitro was assessed by two-dimensional scratch and cell-viability assays and by immunofluorescence for the cell proliferation marker, Ki67. The achievement of peptide concentrations in vivo, equivalent to those exerting a beneficial effect on wound healing in vitro, was confirmed by pharmacokinetic studies of hydroxyproline, a biomarker for collagen peptide absorption, following peptide ingestion by healthy individuals over a wide age range. RESULTS Results demonstrated significant nutraceutical collagen peptide-induced wound closure of both young and aged fibroblasts and keratinocytes, mediated by enhanced cellular proliferation and migration. Analysis of blood levels of hydroxyproline in young and aged individuals following porcine collagen peptide ingestion revealed peak serum/plasma levels after 2 h at similar concentrations to those exerting beneficial effects on wound healing in vitro. CONCLUSION These data demonstrate the capacity for nutraceutical collagen peptides to promote cutaneous wound closure in vitro, at pharmacologically achievable concentrations in vivo, thereby offering a potential novel therapeutic strategy for the management of cutaneous wounds in young and aged individuals.
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Affiliation(s)
- K Mistry
- Translation and Clinical Research Institute, Newcastle University, Newcastle Upon Tyne, Tyne and Wear, UK
| | | | - T Clifford
- Translation and Clinical Research Institute, Newcastle University, Newcastle Upon Tyne, Tyne and Wear, UK.,School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, Leicestershire, UK
| | | | | | - J Prawitt
- Rousselot BVBA, Meulestedekaai, Ghent, Belgium
| | - M Labus
- Translation and Clinical Research Institute, Newcastle University, Newcastle Upon Tyne, Tyne and Wear, UK
| | - B Vanhoecke
- Rousselot BVBA, Meulestedekaai, Ghent, Belgium
| | - P E Lovat
- Translation and Clinical Research Institute, Newcastle University, Newcastle Upon Tyne, Tyne and Wear, UK
| | - A McConnell
- Translation and Clinical Research Institute, Newcastle University, Newcastle Upon Tyne, Tyne and Wear, UK
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8
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Lassig AAD, Lindgren BR, Itabiyi R, Joseph AM, Gupta K. Excessive inflammation portends complications: Wound cytokines and head and neck surgery outcomes. Laryngoscope 2019; 129:E238-E246. [DOI: 10.1002/lary.27796] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 11/06/2018] [Accepted: 12/17/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Amy Anne D. Lassig
- Department of Otolaryngology-Head and Neck Surgery; Hennepin County Medical Center, Minneapolis Medical Research Foundation; Minneapolis Minnesota
- Department of Otolaryngology-Head and Neck Surgery, Division of Head and Neck Surgery; University of Minnesota; Minneapolis Minnesota U.S.A
| | - Bruce R. Lindgren
- Biostatistics and Bioinformatics Core, Masonic Cancer Center; University of Minnesota; Minneapolis Minnesota U.S.A
| | - Ridwan Itabiyi
- Department of Otolaryngology-Head and Neck Surgery, Division of Head and Neck Surgery; University of Minnesota; Minneapolis Minnesota U.S.A
| | - Anne M. Joseph
- Department of Medicine, Division of General Internal Medicine; University of Minnesota; Minneapolis Minnesota U.S.A
| | - Kalpna Gupta
- Department of Medicine, Hematology, Oncology, and Transplantation; University of Minnesota; Minneapolis Minnesota U.S.A
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9
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HPV-Mediated Resistance to TNF and TRAIL Is Characterized by Global Alterations in Apoptosis Regulatory Factors, Dysregulation of Death Receptors, and Induction of ROS/RNS. Int J Mol Sci 2019; 20:ijms20010198. [PMID: 30625987 PMCID: PMC6337392 DOI: 10.3390/ijms20010198] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 12/23/2018] [Accepted: 12/29/2018] [Indexed: 02/07/2023] Open
Abstract
Persistent infection with high-risk human papilloma virus (HR-HPV) is the main risk factor for the development of invasive cervical cancer although is not sufficient to cause cervical cancer. Several host and environmental factors play a key role in cancer initiation/progression, including cytokines and other immune-response mediators. Here, we characterized the response to the individual and combined action of the pro-inflammatory cytokines tumor necrosis factor (TNF) and TNF-related apoptosis-inducing ligand (TRAIL) on HPV-transformed cells and human keratinocytes ectopically expressing E6 and E7 early proteins from different HPV types. We showed that keratinocytes expressing HPV early proteins exhibited global alterations in the expression of proteins involved in apoptosis regulation/execution, including TNF and TRAIL receptors. Besides, we provided evidence that TNF receptor 1 (TNFR1) was down-regulated and may be retained in the cytoplasm of keratinocytes expressing HPV16 oncoproteins. Finally, fluorescence analysis demonstrated that cytokine treatment induced the production and release of reactive oxygen and nitrogen species (ROS/RNS) in cells expressing HPV oncogenes. Alterations in ROS/RNS production and apoptosis regulatory factors expression in response to inflammatory mediators may favor the accumulation of genetic alterations in HPV-infected cells. Altogether, our results suggested that these events may contribute to lesion progression and cancer onset.
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10
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Mechanisms of epithelial thickening due to IL-1 signalling blockade and TNF-α administration differ during wound repair and regeneration. Differentiation 2018; 99:10-20. [DOI: 10.1016/j.diff.2017.12.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 11/20/2017] [Accepted: 12/11/2017] [Indexed: 01/20/2023]
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11
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Hosseini Mansoub N, Gürdal M, Karadadaş E, Kabadayi H, Vatansever S, Ercan G. The role of PRP and adipose tissue-derived keratinocytes on burn wound healing in diabetic rats. ACTA ACUST UNITED AC 2017; 8:5-12. [PMID: 29713597 PMCID: PMC5915708 DOI: 10.15171/bi.2018.02] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 10/30/2017] [Accepted: 11/08/2017] [Indexed: 02/01/2023]
Abstract
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Introduction:
Diabetic burn wounds and ulcers are significant complications of diabetic patients. The aim of this study is to investigate the use of platelet rich-plasma (PRP) and/or keratinocyte-like cells (KLCs) in diabetic thermal wound rat model and to evaluate EGF, FGF-2, TGF-β1, COL1α2, MCP-1 and VEGF-α as wound healing markers at gene expression level.
Method:
In this study, we used adipose tissue as the source of mesenchymal stem cells (MSCs) and differentiated MSCs into KLCs. KLCs were characterized and transferred to the burn areas on the dorsum of streptozotocine (STZ)-induced diabetic rats. We prepared PRP from rat blood and evaluated its effect alone or in combination with KLCs. On 3rd, 7th, 10th and 14th days after treatment, wound areas were measured and biopsy samples were excised from the wound areas of the KLCs and/or PRP-treated and untreated diabetic rats to analyze gene expression levels of wound healing markers by qPCR.
Results:
We observed that, wound contraction started earlier in the PRP and/or KLCs-treated groups in comparison to the control group. However, PRP and KLCs when applied in combination showed additive affect in wound healing. In all groups treated with KLCs and/or PRP, the gene expression levels of evaluated growth factors and COL1α2 increased, while MCP-1 levels decreased when compared to the untreated diabetic rats. In addition, the most prominent difference in qPCR results belongs to combined PRP and KLCs-treated group.
Conclusion:
We demonstrated that applying PRP and KLCs in combination has a greater potential for treatment of diabetic burn wounds.
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Affiliation(s)
- Navid Hosseini Mansoub
- Department of Medical Biochemistry, Faculty of Medicine, Ege University, Izmir, 35100, Turkey
| | - Mehmet Gürdal
- Department of Medical Biochemistry, Faculty of Medicine, Ege University, Izmir, 35100, Turkey
| | - Elif Karadadaş
- Department of Medical Biochemistry, Faculty of Medicine, Ege University, Izmir, 35100, Turkey
| | - Hilal Kabadayi
- Department of Histology and Embryology, Faculty of Medicine, Celal Bayar University, Manisa, 45200, Turkey
| | - Seda Vatansever
- Department of Histology and Embryology, Faculty of Medicine, Celal Bayar University, Manisa, 45200, Turkey.,Experimental Health Sciences Research Center, Near East University, Mersin, 33010, Turkey
| | - Gulinnaz Ercan
- Department of Medical Biochemistry, Faculty of Medicine, Ege University, Izmir, 35100, Turkey.,Department of Stem Cell, Institute of Health Sciences, Ege University, Izmir, 35100, Turkey
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12
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4-Hydroxybenzaldehyde accelerates acute wound healing through activation of focal adhesion signalling in keratinocytes. Sci Rep 2017; 7:14192. [PMID: 29079748 PMCID: PMC5660242 DOI: 10.1038/s41598-017-14368-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/09/2017] [Indexed: 01/16/2023] Open
Abstract
4-Hydroxybenzaldehyde (4-HBA) is a naturally occurring benzaldehyde and the major active constituent of Gastrodia elata. While recent studies have demonstrated metabolic effects of 4-HBA, little is known about the physiological role of 4-HBA in acute wound healing. Here, we investigated the effects and mechanisms of 4-HBA on acute wound healing. Using an in vitro approach, we found that 4-HBA significantly promoted keratinocyte cell migration and invasion by increasing focal adhesion kinase and Src activity. In addition, 4-HBA treatment also promoted wound healing and re-epithelialization in an in vivo excision wound animal model. Combination treatment with 4-HBA and platelet-derived growth factor subunit B homodimer showed synergistic effects in promoting wound healing. Taken together, our results demonstrated that treatment with 4-HBA promoted keratinocyte migration and wound healing in mouse skin through the Src/mitogen-activated protein kinase pathway. Therefore, 4-HBA could be a candidate therapeutic agent with the potential to promote acute wound healing.
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13
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14
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Kanapathy M, Hachach‐Haram N, Bystrzonowski N, Connelly JT, O'Toole EA, Becker DL, Mosahebi A, Richards T. Epidermal grafting for wound healing: a review on the harvesting systems, the ultrastructure of the graft and the mechanism of wound healing. Int Wound J 2017; 14:16-23. [PMID: 27785878 PMCID: PMC7950150 DOI: 10.1111/iwj.12686] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 10/07/2016] [Indexed: 12/13/2022] Open
Abstract
Epidermal grafting for wound healing involves the transfer of the epidermis from a healthy location to cover a wound. The structural difference of the epidermal graft in comparison to the split-thickness skin graft and full-thickness skin graft contributes to the mechanism of effect. While skin grafting is an epidermal transfer, little is known about the precise mechanism of wound healing by epidermal graft. This paper aims to explore the evolution of the epidermal graft harvesting system over the last five decades, the structural advantages of epidermal graft for wound healing and the current hypotheses on the mechanism of wound healing by epidermal graft. Three mechanisms are proposed: keratinocyte activation, growth factor secretion and reepithelialisation from the wound edge. We evaluate and explain how these processes work and integrate to promote wound healing based on the current in vivo and in vitro evidence. We also review the ongoing clinical trials evaluating the efficacy of epidermal graft for wound healing. The epidermal graft is a promising alternative to the more invasive conventional surgical techniques as it is simple, less expensive and reduces the surgical burden for patients in need of wound coverage.
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Affiliation(s)
- Muholan Kanapathy
- Division of Surgery & Interventional ScienceUniversity College LondonLondonUK
- London Wound Healing Group, Department of Plastic and Reconstructive SurgeryRoyal Free NHS Foundation Trust HospitalLondonUK
| | - Nadine Hachach‐Haram
- London Wound Healing Group, Department of Plastic and Reconstructive SurgeryRoyal Free NHS Foundation Trust HospitalLondonUK
| | - Nicola Bystrzonowski
- London Wound Healing Group, Department of Plastic and Reconstructive SurgeryRoyal Free NHS Foundation Trust HospitalLondonUK
| | - John T Connelly
- Centre for Cell Biology and Cutaneous Research, The Blizard InstituteBarts and The London School of Medicine and Dentistry, Queen Mary University of LondonLondonUK
| | - Edel A O'Toole
- Centre for Cell Biology and Cutaneous Research, The Blizard InstituteBarts and The London School of Medicine and Dentistry, Queen Mary University of LondonLondonUK
| | - David L Becker
- Lee Kong Chian School of MedicineNanyang Technological UniversitySingaporeSingapore
- Institute of Medical BiologyA*Star, Immunos, Biomedical GroveSingaporeSingapore
| | - Afshin Mosahebi
- Division of Surgery & Interventional ScienceUniversity College LondonLondonUK
- London Wound Healing Group, Department of Plastic and Reconstructive SurgeryRoyal Free NHS Foundation Trust HospitalLondonUK
| | - Toby Richards
- Division of Surgery & Interventional ScienceUniversity College LondonLondonUK
- London Wound Healing Group, Department of Plastic and Reconstructive SurgeryRoyal Free NHS Foundation Trust HospitalLondonUK
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DEMİRBİLEK M, TÜRKOĞLU LAÇİN N, AKTÜRK S. N-Acetylglucoseamine modified alginate sponges as scaffolds for skin tissue engineering. Turk J Biol 2017. [DOI: 10.3906/biy-1704-31] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Heikinheimo K, Jee KJ, Morgan PR, Nagy B, Knuutila S, Leivo I. Genetic Changes in Sporadic Keratocystic Odontogenic Tumors (Odontogenic Keratocysts). J Dent Res 2016; 86:544-9. [PMID: 17525355 DOI: 10.1177/154405910708600611] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Little is known about the genetic background of keratocystic odontogenic tumors (KCOT, odontogenic keratocysts). Our aim was to characterize genomic aberrations in sporadic KCOT using cDNA-expression arrays and array-comparative genomic hybridization. For cDNA-expression arrays, 10 KCOT specimens and 20 fetal tooth germs were studied. Quantitative real-time reverse-transcription/polymerase chain-reaction and immunohistochemical studies were also undertaken. Several genes were over-expressed in 12q13, including cytokeratin 6B ( KRT6B) (≈ 10-fold), epidermal growth factor receptor ERBB3 (~ 4.7-fold), and glioma-associated oncogene homologue 1 ( GLI1) (~ 5- to 12-fold). One amplicon (~ 0.7 Mega base pairs [Mbp]), covering several genes involved in the regulation of cell growth, was found in 12q13.2. Deletions were found in 3q13.1, 5p14.3, and 7q31.3, including the cell-adhesion-related gene cadherin 18 ( CDH18) and leukocyte cell adhesion molecule ( ALCAM, MEMD). Over-expressed and amplified genes in 12q13, also reported in several other tumors and cell lines, may contribute to the persistent growth characteristics of KCOT.
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Affiliation(s)
- K Heikinheimo
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FIN-20520 Turku, Finland.
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Guldiken N, Kobazi Ensari G, Lahiri P, Couchy G, Preisinger C, Liedtke C, Zimmermann HW, Ziol M, Boor P, Zucman-Rossi J, Trautwein C, Strnad P. Keratin 23 is a stress-inducible marker of mouse and human ductular reaction in liver disease. J Hepatol 2016; 65:552-9. [PMID: 27151178 DOI: 10.1016/j.jhep.2016.04.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 04/06/2016] [Accepted: 04/23/2016] [Indexed: 01/09/2023]
Abstract
BACKGROUND & AIMS Keratins (K) constitute the epithelial intermediate filaments. Among them, K7/K19 are widely used markers of the regenerative liver response termed ductular reaction (DR) that consists of activated biliary epithelial cells (BECs) and hepatic progenitor cells (HPCs) and correlates with liver disease severity. In the present study we aimed to characterize K23 in the liver. METHODS We analyzed the expression and localization of K23 in the digestive system under basal conditions as well as in various human and mouse liver diseases/stress models. Cell culture studies were used to study factors regulating K23 expression. RESULTS In untreated mice, K23 was restricted to biliary epithelia. It was (together with K7/K19) markedly upregulated in three different DR/cholestatic injury models, i.e., multidrug resistance protein 2 (Mdr2) knockouts, animals treated with 3,5-diethoxycarbonyl-1,4-dihydrocollidine or subjected to bile duct ligation. K23 levels correlated with the DR marker Fn14 and immunofluorescence staining showed a distinct co-localization with K7/K19. In chronic human liver disease, K23 expression increased in patients with a more prominent inflammation/fibrosis. A dramatic upregulation (>200times) was observed in patients with acute liver failure (ALF) and end-stage primary biliary cholangitis (PBC). Patients with alcoholic liver cirrhosis displayed increased K23 serum levels. In primary hepatocytes as well as hepatobiliary cell lines, treatment with TNF-related weak inducer of apoptosis (TWEAK), and the type I acute phase inducer interleukin (IL)-1β but not the type II inducer IL-6 elevated K23 expression. CONCLUSIONS K23 represents a specific, stress-inducible DR marker, whose levels correlate with liver disease severity. K23 may represent a useful non-invasive DR marker. LAY SUMMARY Ductular reaction represents a basic response to liver injury and correlates with liver disease severity. Our study identifies K23 as a novel ductular reaction marker in mice and humans.
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Affiliation(s)
- Nurdan Guldiken
- Department of Internal Medicine III, RWTH University Hospital Aachen, Germany; Interdisciplinary Center for Clinical Research (IZKF), RWTH University Hospital Aachen, Germany
| | - Gokce Kobazi Ensari
- Department of Internal Medicine III, RWTH University Hospital Aachen, Germany
| | - Pooja Lahiri
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Gabrielle Couchy
- Inserm, UMR-1162, Génomique fonctionnelle des Tumeurs solides, Equipe Labellisée Ligue Contre le Cancer, Paris F-75010, France; Université Paris Descartes, Labex Immuno-Oncology, Sorbonne Paris Cité, F-75010 Paris, France; Université Paris 13, Sorbonne Paris Cité, UFR SMBH, F-93000 Bobigny, France; Université Paris Diderot, IUH, F-75010 Paris, France
| | - Christian Preisinger
- Interdisciplinary Center for Clinical Research (IZKF), RWTH University Hospital Aachen, Germany
| | - Christian Liedtke
- Department of Internal Medicine III, RWTH University Hospital Aachen, Germany
| | | | - Marianne Ziol
- Université Paris 13, Sorbonne Paris Cité, UFR SMBH, F-93000 Bobigny, France; Pathology Department, GH Paris-Seine-Saint-Denis, APHP, Bondy, France; Centre de ressources biologiques BB-0033-00027 - Hôpital Jean Verdier, GH Paris-Seine-Saint-Denis, APHP, Bondy, France
| | - Peter Boor
- Department of Nephrology and Institute of Pathology, RWTH University Hospital Aachen, Germany
| | - Jessica Zucman-Rossi
- Inserm, UMR-1162, Génomique fonctionnelle des Tumeurs solides, Equipe Labellisée Ligue Contre le Cancer, Paris F-75010, France; Université Paris Descartes, Labex Immuno-Oncology, Sorbonne Paris Cité, F-75010 Paris, France; Université Paris 13, Sorbonne Paris Cité, UFR SMBH, F-93000 Bobigny, France; Université Paris Diderot, IUH, F-75010 Paris, France
| | - Christian Trautwein
- Department of Internal Medicine III, RWTH University Hospital Aachen, Germany
| | - Pavel Strnad
- Department of Internal Medicine III, RWTH University Hospital Aachen, Germany; Interdisciplinary Center for Clinical Research (IZKF), RWTH University Hospital Aachen, Germany.
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Utheim TP, Islam R, Fostad IG, Eidet JR, Sehic A, Olstad OK, Dartt DA, Messelt EB, Griffith M, Pasovic L. Storage Temperature Alters the Expression of Differentiation-Related Genes in Cultured Oral Keratinocytes. PLoS One 2016; 11:e0152526. [PMID: 27023475 PMCID: PMC4811429 DOI: 10.1371/journal.pone.0152526] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Accepted: 03/15/2016] [Indexed: 12/17/2022] Open
Abstract
Purpose Storage of cultured human oral keratinocytes (HOK) allows for transportation of cultured transplants to eye clinics worldwide. In a previous study, one-week storage of cultured HOK was found to be superior with regard to viability and morphology at 12°C compared to 4°C and 37°C. To understand more of how storage temperature affects cell phenotype, gene expression of HOK before and after storage at 4°C, 12°C, and 37°C was assessed. Materials and Methods Cultured HOK were stored in HEPES- and sodium bicarbonate-buffered Minimum Essential Medium at 4°C, 12°C, and 37°C for one week. Total RNA was isolated and the gene expression profile was determined using DNA microarrays and analyzed with Partek Genomics Suite software and Ingenuity Pathway Analysis. Differentially expressed genes (fold change > 1.5 and P < 0.05) were identified by one-way ANOVA. Key genes were validated using qPCR. Results Gene expression of cultures stored at 4°C and 12°C clustered close to the unstored control cultures. Cultures stored at 37°C displayed substantial change in gene expression compared to the other groups. In comparison with 12°C, 2,981 genes were differentially expressed at 37°C. In contrast, only 67 genes were differentially expressed between the unstored control and the cells stored at 12°C. The 12°C and 37°C culture groups differed most significantly with regard to the expression of differentiation markers. The Hedgehog signaling pathway was significantly downregulated at 37°C compared to 12°C. Conclusion HOK cultures stored at 37°C showed considerably larger changes in gene expression compared to unstored cells than cultured HOK stored at 4°C and 12°C. The changes observed at 37°C consisted of differentiation of the cells towards a squamous epithelium-specific phenotype. Storing cultured ocular surface transplants at 37°C is therefore not recommended. This is particularly interesting as 37°C is the standard incubation temperature used for cell culture.
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Affiliation(s)
- Tor Paaske Utheim
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
- Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
- Department of Ophthalmology, Vestre Viken HF Trust, Drammen, Norway
- Faculty of Health Sciences, National Centre for Optics, Vision and Eye Care, Buskerud and Vestfold University College, Kongsberg, Norway
| | - Rakibul Islam
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
- Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Ida G. Fostad
- Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Jon R. Eidet
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
- Department of Ophthalmology, Oslo University Hospital, Oslo, Norway
| | - Amer Sehic
- Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Ole K. Olstad
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Darlene A. Dartt
- Schepens Eye Research Institute, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Edward B. Messelt
- Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - May Griffith
- Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Lara Pasovic
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
- Faculty of Medicine, University of Oslo, Oslo, Norway
- * E-mail:
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Domaszewska-Szostek A, Zaleska M, Olszewski WL. Hyperkeratosis in human lower limb lymphedema: the effect of stagnant tissue fluid/lymph. J Eur Acad Dermatol Venereol 2016; 30:1002-8. [PMID: 26869365 DOI: 10.1111/jdv.13565] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 11/05/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Hyperkeratosis of skin in lower limb lymphedema is one of the sequelae of tissue fluid/lymph (TF/L) stasis, but its mechanisms remain unknown. It is noteworthy, nonetheless, that human TF/L contains high levels of growth factors and cytokines, and may serve as the physiological environment for keratinocyte (KC) proliferation. OBJECTIVE The aim of the study was to investigate the effect of human TF/L on human KC proliferation, differentiation and on the expression of epidermal stem cell markers on them. METHODS KC were isolated from lymphedema and normal skin, and cultured for 1-14 days in TF/L with neutralized Interleukin 1β, Interleukin 6, tumour necrosis factor α (TNF-α), keratinocyte growth factor (KGF) or tumour growth factor β (TGF-β). Alternatively, KC receptors for these factors were blocked. RESULTS The number of KC cultured in TF/L was increased, as was the percentage of mitotic figures. There was a higher percentage of p63, CD29, Ki67, PCNA, CK6, CK17, CK16 and a lower of CK10, CK14, filaggrin and involucrin-positive KC. Neutralization of TF/L IL-1β, IL-6, TNF-α and KGF as well as blockage of their receptors resulted in decreased percentage of mitotic KC. TGF-β had a limited effect on KC proliferation. CONCLUSION Hyperkeratosis in lymphedema may be the effect of a high concentration of cytokines in the stagnant TF/L tissue, but not because of presumed changes in the KC.
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Affiliation(s)
- A Domaszewska-Szostek
- Department of Transplantation Surgery and Department of Human Epigenetics, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - M Zaleska
- Department of Transplantation Surgery and Department of Human Epigenetics, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - W L Olszewski
- Department of Transplantation Surgery and Department of Human Epigenetics, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland.,Department of Transplantation and Vascular Surgery, Central Clinical Hospital, Ministry of Internal Affairs, Warsaw, Poland
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Yang Z, Cui K, Zhang Y, Deng X. Transcriptional regulation analysis and the potential transcription regulator site in the extended KAP6.1 promoter in sheep. Mol Biol Rep 2014; 41:6089-96. [PMID: 24990691 DOI: 10.1007/s11033-014-3485-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 06/17/2014] [Indexed: 11/24/2022]
Abstract
The high glycine/tyrosine type II keratin protein 6.1 (KAP6.1) is a member of the keratin-associated protein family, which is restricted to cells in hair follicles and is associated with fiber diameter and fiber curvature in Merino sheep. In this study, we obtained a series of progressive 5'-deletion fragments of the KAP6.1 gene promoter from ovine genomic DNA. The KAP6.1 5'-upstream region was fused to luciferase and transfected into sheep fetal fibroblast cells (sFFCs). We demonstrated that the sequence from -1,523 to -1 bp (taking the A of the initiator methionine ATG as the +1 nt position) gave rise to a higher luciferase activity comparing to the published region from -1,042 to -1 bp. Whereas, decreased transcriptional activity of the KAP6.1 promoter was observed when the sequence extended to -3,699 bp. To identify the DNA elements that are important for transcriptional activity, we performed structural analysis and electrophoretic mobility shift assay (EMSA). Structural analysis of the KAP6.1 promoter showed that transcription factors NF-kappa-B, AP-1, and C/EBP-alpha synergistically activate KAP6.1 promoter, while POU2F1 might function as a strong negative regulator. The EMSA showed that NF-kappa-B element bound to the nuclear protein extracted from sFFCs. We conclude that NF-kappa-B binding site is an enhancer element of KAP6.1 promoter in vitro. The results are potentially useful for elucidating the regulator mechanisms of KAP6.1.
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Affiliation(s)
- Zu Yang
- Beijing Key Laboratory of Animal Genetic Improvement & Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China,
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Pastar I, Stojadinovic O, Yin NC, Ramirez H, Nusbaum AG, Sawaya A, Patel SB, Khalid L, Isseroff RR, Tomic-Canic M. Epithelialization in Wound Healing: A Comprehensive Review. Adv Wound Care (New Rochelle) 2014; 3:445-464. [PMID: 25032064 DOI: 10.1089/wound.2013.0473] [Citation(s) in RCA: 791] [Impact Index Per Article: 79.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 09/20/2013] [Indexed: 12/20/2022] Open
Abstract
Significance: Keratinocytes, a major cellular component of the epidermis, are responsible for restoring the epidermis after injury through a process termed epithelialization. This review will focus on the pivotal role of keratinocytes in epithelialization, including cellular processes and mechanisms of their regulation during re-epithelialization, and their cross talk with other cell types participating in wound healing. Recent Advances: Discoveries in epidermal stem cells, keratinocyte immune function, and the role of the epidermis as an independent neuroendocrine organ will be reviewed. Novel mechanisms of gene expression regulation important for re-epithelialization, including microRNAs and histone modifications, will also be discussed. Critical Issues: Epithelialization is an essential component of wound healing used as a defining parameter of a successful wound closure. A wound cannot be considered healed in the absence of re-epithelialization. The epithelialization process is impaired in all types of chronic wounds. Future Directions: A comprehensive understanding of the epithelialization process will ultimately lead to the development of novel therapeutic approaches to promote wound closure.
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Affiliation(s)
- Irena Pastar
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Olivera Stojadinovic
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Natalie C. Yin
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Horacio Ramirez
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Aron G. Nusbaum
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Andrew Sawaya
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Shailee B. Patel
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Laiqua Khalid
- Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | | | - Marjana Tomic-Canic
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
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Loss of keratin 13 in oral carcinoma in situ: a comparative study of protein and gene expression levels using paraffin sections. Mod Pathol 2012; 25:784-94. [PMID: 22301701 DOI: 10.1038/modpathol.2011.218] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Immunohistochemical loss of keratin (K)13 is one of the most valuable diagnostic criteria for discriminating carcinoma in situ (CIS) from non-malignancies in the oral mucosa while K13 is stably immunolocalized in the prickle cells of normal oral epithelium. To elucidate the molecular mechanism for the loss of K13, we compared the immunohistochemical profiles for K13 and K16 which is not expressed in normal epithelia, but instead enhanced in CIS, with their mRNA levels by in-situ hybridization in formalin-fixed paraffin sections prepared from 23 CIS cases of the tongue, which were surgically removed. Reverse transcriptase-PCR was also performed using RNA samples extracted from laser-microdissected epithelial fragments of the serial paraffin sections in seven of the cases. Although more enhanced expression levels for K16 were confirmed at both the protein and gene levels in CIS in these seven cases, the loss of K13 was associated with repressed mRNA levels in four cases, but not in the other three cases. The results suggest that the loss of K13 is partly due to its gene repression, but may also be due to some unknown post-translational events.
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Bragulla HH, Homberger DG. Structure and functions of keratin proteins in simple, stratified, keratinized and cornified epithelia. J Anat 2010; 214:516-59. [PMID: 19422428 DOI: 10.1111/j.1469-7580.2009.01066.x] [Citation(s) in RCA: 409] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Historically, the term 'keratin' stood for all of the proteins extracted from skin modifications, such as horns, claws and hooves. Subsequently, it was realized that this keratin is actually a mixture of keratins, keratin filament-associated proteins and other proteins, such as enzymes. Keratins were then defined as certain filament-forming proteins with specific physicochemical properties and extracted from the cornified layer of the epidermis, whereas those filament-forming proteins that were extracted from the living layers of the epidermis were grouped as 'prekeratins' or 'cytokeratins'. Currently, the term 'keratin' covers all intermediate filament-forming proteins with specific physicochemical properties and produced in any vertebrate epithelia. Similarly, the nomenclature of epithelia as cornified, keratinized or non-keratinized is based historically on the notion that only the epidermis of skin modifications such as horns, claws and hooves is cornified, that the non-modified epidermis is a keratinized stratified epithelium, and that all other stratified and non-stratified epithelia are non-keratinized epithelia. At this point in time, the concepts of keratins and of keratinized or cornified epithelia need clarification and revision concerning the structure and function of keratin and keratin filaments in various epithelia of different species, as well as of keratin genes and their modifications, in view of recent research, such as the sequencing of keratin proteins and their genes, cell culture, transfection of epithelial cells, immunohistochemistry and immunoblotting. Recently, new functions of keratins and keratin filaments in cell signaling and intracellular vesicle transport have been discovered. It is currently understood that all stratified epithelia are keratinized and that some of these keratinized stratified epithelia cornify by forming a Stratum corneum. The processes of keratinization and cornification in skin modifications are different especially with respect to the keratins that are produced. Future research in keratins will provide a better understanding of the processes of keratinization and cornification of stratified epithelia, including those of skin modifications, of the adaptability of epithelia in general, of skin diseases, and of the changes in structure and function of epithelia in the course of evolution. This review focuses on keratins and keratin filaments in mammalian tissue but keratins in the tissues of some other vertebrates are also considered.
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Affiliation(s)
- Hermann H Bragulla
- Department of Comparative Biomedical Sciences, Louisiana State University, Baton Rouge, 70803, USA.
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HGF-promoted motility in primary human melanocytes depends on CD44v6 regulated via NF-kappa B, Egr-1, and C/EBP-beta. J Invest Dermatol 2010; 130:1893-903. [PMID: 20357818 DOI: 10.1038/jid.2010.45] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The regulation of CD44v6, a variant of the CD44 family of glycosylated adhesion molecules, through hepatocyte growth factor (HGF) has implications for motility in primary human melanocytes. We show that exposure of primary human melanocytes to HGF results in an increase of CD44v6 expression. Immunostaining of melanocytic lesions revealed low cytoplasmic positivity of CD44v6 in some nevi but high membranous expression in primary cutaneous melanomas, and cutaneous and lymph node metastases. HGF-dependent CD44v6 regulation in melanocytes is NF-kappaB dependent because BAY 11-7082, an inhibitor of NF-kappaB activation, but not interference with the mitogen-activated protein kinase or phosphatidylinositol 3-kinase cascade, antagonized HGF-induced CD44v6 expression. NF-kappaB-mediated transcriptional regulation of CD44v6 involves the transcription factors Egr-1 and CCAAT enhancer-binding protein-beta (C/EBP-beta). In gel shift assays, the initial binding of p100/p52 NF-kappaB, C/EBP-beta, and Egr-1 to the CD44 promoter experienced reshuffling toward increased affinity of C/EBP-beta after HGF stimulation. A blocking antibody to CD44v6 decreased HGF-induced c-Met phosphorylation as well as enhanced random- and site-directed migration. Our data show that HGF-induced motility in primary human melanocytes depends on c-Met-CD44v6 interaction, and that HGF-enhanced CD44v6 expression is required for motility and transcriptional upregulation of CD44v6, presumably mediated through a complex comprising NF-kappaB/C/EBP-beta and Egr-1.
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The schistosome excretory system: a key to regulation of metabolism, drug excretion and host interaction. Trends Parasitol 2009; 25:353-8. [PMID: 19617001 DOI: 10.1016/j.pt.2009.05.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Revised: 05/02/2009] [Accepted: 05/08/2009] [Indexed: 11/24/2022]
Abstract
There is a gulf between the enormous information content of the various genome projects and the understanding of the life of the parasite in the host. In vitro studies with adult Schistosoma mansoni using several substrates suggest that the excretory system contains both P-glycoproteins and multiresistance proteins. If both these families of protein were active in vivo, they could regulate parasite metabolism and be responsible for the excretion of drugs. During skin penetration, membrane-impermeant molecules of a wide range of molecular weights can be taken into the cercaria and schistosomulum through the nephridiopore, through the surface membrane or through both. We speculate that this uptake process might stimulate novel signalling pathways involved in growth and development.
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Ignatova ID, Kostadinova RM, Goldring CE, Nawrocki AR, Frey FJ, Frey BM. Tumor necrosis factor-alpha upregulates 11beta-hydroxysteroid dehydrogenase type 1 expression by CCAAT/enhancer binding protein-beta in HepG2 cells. Am J Physiol Endocrinol Metab 2009; 296:E367-77. [PMID: 19088256 DOI: 10.1152/ajpendo.90531.2008] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The enzyme 11beta-hydroxysteroid dehydrogenase type 1 (11beta-HSD1) catalyzes the conversion of inactive to active glucocorticoids. 11beta-HSD1 plays a crucial role in the pathogenesis of obesity and controls glucocorticoid actions in inflammation. Several studies have demonstrated that TNF-alpha increases 11beta-HSD1 mRNA and activity in various cell models. Here, we demonstrate that mRNA and activity of 11beta-HSD1 is increased in liver tissue from transgenic mice overexpressing TNF-alpha, indicating that this effect also occurs in vivo. To dissect the molecular mechanism of this increase, we investigated basal and TNF-alpha-induced transcription of the 11beta-HSD1 gene (HSD11B1) in HepG2 cells. We found that TNF-alpha acts via p38 MAPK pathway. Transient transfections with variable lengths of human HSD11B1 promoter revealed highest activity with or without TNF-alpha in the proximal promoter region (-180 to +74). Cotransfection with human CCAAT/enhancer binding protein-alpha (C/EBPalpha) and C/EBPbeta-LAP expression vectors activated the HSD11B1 promoter with the strongest effect within the same region. Gel shift and RNA interference assays revealed the involvement of mainly C/EBPalpha, but also C/EBPbeta, in basal and only of C/EBPbeta in the TNF-alpha-induced HSD11B1 expression. Chromatin immunoprecipitation assay confirmed in vivo the increased abundance of C/EBPbeta on the proximal HSD11B1 promoter upon TNF-alpha treatment. In conclusion, C/EBPalpha and C/EBPbeta control basal transcription, and TNF-alpha upregulates 11beta-HSD1, most likely by p38 MAPK-mediated increased binding of C/EBPbeta to the human HSD11B1 promoter. To our knowledge, this is the first study showing involvement of p38 MAPK in the TNF-alpha-mediated 11beta-HSD1 regulation, and that TNF-alpha stimulates enzyme activity in vivo.
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Affiliation(s)
- Irena D Ignatova
- Depts. of Nephrology and Hypertension and Clinical Research, Freiburgstrasse 15, Univ. Hospital, Berne, CH-3010 Berne, Switzerland
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Fang S, Zeng F, Guo Q. Comparative proteomics analysis of cytokeratin and involucrin expression in lesions from patients with systemic lupus erythematosus. Acta Biochim Biophys Sin (Shanghai) 2008; 40:989-95. [PMID: 19089296 DOI: 10.1111/j.1745-7270.2008.00484.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
To get a better understanding of the abnormal differentiation or maturation of keratinocytes, we studied the expression and distribution of cytokeratin and involucrin in lesions from systemic lupus erythematosus patients. Two groups of 10 specimens each from systemic lupus erythematosus and normal controls were analyzed by two-dimensional gel electrophoresis, mass spectrometric protein identification, Western blotting and immunohistochemistry. Our results showed that keratin 1 (K1)/K10 together with the new synthesis of K6/K16 were down-regulated and that K5/K14, K2e and involucrin were up-regulated. We found that involucrin was strongly stained in lower epidermal cell layers while K1/10 was weakly stained, particularly when compared with staining in normal epidermis. Additionally, we found that the expression of involucrin was increased. These results imply an aberrant early and terminal differentiation stage in the epidermis of systemic lupus erythematosus, which may be associated with inflammatory cytokines released during the wound healing response of lesion.
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Affiliation(s)
- Sheng Fang
- Department of Dermatology, The Second Hospital affiliated to Zhongshan University, Guangzhou, China
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Barrientos S, Stojadinovic O, Golinko MS, Brem H, Tomic-Canic M. PERSPECTIVE ARTICLE: Growth factors and cytokines in wound healing. Wound Repair Regen 2008; 16:585-601. [PMID: 19128254 DOI: 10.1111/j.1524-475x.2008.00410.x] [Citation(s) in RCA: 2371] [Impact Index Per Article: 148.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Stephan Barrientos
- University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
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Gu LH, Coulombe PA. Hedgehog signaling, keratin 6 induction, and sebaceous gland morphogenesis: implications for pachyonychia congenita and related conditions. THE AMERICAN JOURNAL OF PATHOLOGY 2008; 173:752-61. [PMID: 18688029 DOI: 10.2353/ajpath.2008.071089] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Keratins 6a and b (K6a, K6b) belong to a subset of keratin genes with constitutive expression in epithelial appendages, and inducible expression in additional epithelia, when subjected to environmental challenges or disease. Mutations in K6a or K6b cause a broad spectrum of epithelial lesions that differentially affect nail, hair, and glands in humans. Some lesions reflect a loss of the structural support function shared by K6, other keratins, and intermediate filament proteins. The formation of sebaceous gland-derived epithelial cysts does not fit this paradigm, raising the question of the unique functions of different K6 isoforms in this setting. Here, we exploit a mouse model of constitutively expressed Gli2, a Hedgehog (Hh) signal effector, to show that K6a expression correlates with duct fate in sebaceous glands (SGs). Whether in the setting of Gli2 transgenic mice skin, which develops a prominent SG duct and additional pairs of highly branched SGs, or in wild-type mouse skin, K6a expression consistently coincides with Hh signaling in ductal tissue. Gli2 expression modestly transactivates a K6a promoter-driven reporter in heterologous systems. Our findings thus identify K6 as a marker of duct fate in SGs, partly in response to Hh signaling, with implications for the pathological expansion of SGs that arises in the context of certain keratin-based diseases and related disorders.
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Affiliation(s)
- Li-Hong Gu
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, 725 N. Wolfe St., Baltimore, MD 21205, USA
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Termini L, Boccardo E, Esteves GH, Hirata R, Martins WK, Colo AEL, Neves EJ, Villa LL, Reis LFL. Characterization of global transcription profile of normal and HPV-immortalized keratinocytes and their response to TNF treatment. BMC Med Genomics 2008; 1:29. [PMID: 18588690 PMCID: PMC2459201 DOI: 10.1186/1755-8794-1-29] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Accepted: 06/27/2008] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Persistent infection by high risk HPV types (e.g. HPV-16, -18, -31, and -45) is the main risk factor for development of cervical intraepithelial neoplasia and cervical cancer. Tumor necrosis factor (TNF) is a key mediator of epithelial cell inflammatory response and exerts a potent cytostatic effect on normal or HPV16, but not on HPV18 immortalized keratinocytes. Moreover, several cervical carcinoma-derived cell lines are resistant to TNF anti-proliferative effect suggesting that the acquisition of TNF-resistance may constitute an important step in HPV-mediated carcinogenesis. In the present study, we compared the gene expression profiles of normal and HPV16 or 18 immortalized human keratinocytes before and after treatment with TNF for 3 or 60 hours. METHODS In this study, we determined the transcriptional changes 3 and 60 hours after TNF treatment of normal, HPV16 and HPV18 immortalized keratinocytes by microarray analysis. The expression pattern of two genes observed by microarray was confirmed by Northern Blot. NF-kappaB activation was also determined by electrophoretic mobility shift assay (EMSA) using specific oligonucleotides and nuclear protein extracts. RESULTS We observed the differential expression of a common set of genes in two TNF-sensitive cell lines that differs from those modulated in TNF-resistant ones. This information was used to define genes whose differential expression could be associated with the differential response to TNF, such as: KLK7 (kallikrein 7), SOD2 (superoxide dismutase 2), 100P (S100 calcium binding protein P), PI3 (protease inhibitor 3, skin-derived), CSTA (cystatin A), RARRES1 (retinoic acid receptor responder 1), and LXN (latexin). The differential expression of the KLK7 and SOD2 transcripts was confirmed by Northern blot. Moreover, we observed that SOD2 expression correlates with the differential NF-kappaB activation exhibited by TNF-sensitive and TNF-resistant cells. CONCLUSION This is the first in depth analysis of the differential effect of TNF on normal and HPV16 or HPV18 immortalized keratinocytes. Our findings may be useful for the identification of genes involved in TNF resistance acquisition and candidate genes which deregulated expression may be associated with cervical disease establishment and/or progression.
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Affiliation(s)
- Lara Termini
- Ludwig Institute for Cancer Research, São Paulo, Brazil
- Hospital do Câncer A. C. Camargo, São Paulo, Brazil
| | | | - Gustavo H Esteves
- Instituto de Matemática e Estatística da Universidade de São Paulo, São Paulo, Brazil
| | - Roberto Hirata
- Instituto de Matemática e Estatística da Universidade de São Paulo, São Paulo, Brazil
| | - Waleska K Martins
- Ludwig Institute for Cancer Research, São Paulo, Brazil
- Hospital do Câncer A. C. Camargo, São Paulo, Brazil
| | - Anna Estela L Colo
- Ludwig Institute for Cancer Research, São Paulo, Brazil
- Hospital do Câncer A. C. Camargo, São Paulo, Brazil
| | - E Jordão Neves
- Instituto de Matemática e Estatística da Universidade de São Paulo, São Paulo, Brazil
| | | | - Luiz FL Reis
- Ludwig Institute for Cancer Research, São Paulo, Brazil
- Hospital do Câncer A. C. Camargo, São Paulo, Brazil
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Hendrix SW, Miller KH, Youket TE, Adam R, O'Connor RJ, Morel JG, Tepper BE. Optimization of the skin multiple analyte profile bioanalytical method for determination of skin biomarkers from D-Squame tape samples. Skin Res Technol 2007; 13:330-42. [PMID: 17610656 DOI: 10.1111/j.1600-0846.2007.00235.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND/PURPOSE This work was performed to optimize extraction conditions for D-Squame tape skin samples for use in the skin multiple analyte profile (SkinMAP) method, a Linco Research Corporation bead-based assay for skin analytes. The experiments were designed to help identify sources of variability during extraction that may be amenable to further control. METHODS Two experimental designs were used to study factors influencing the extraction of skin samples from D-Squame tapes. Visually healthy skin samples were obtained from both female and male adult volar forearms. Factors studied in two experiments included: four surfactant (SDS) levels (0.02-0.2%), two buffer types [Citrate-phosphate buffered saline at pH 5.5, phosphate-buffered saline (PBS) at pH 7.4], two buffer volumes (1.0, 1.5 mL), two propylene glycol (PG) levels (0.1%, 1.0%), two extraction temperatures (7-10 degrees C, 22-30+ degrees C), two extraction times (30, 60 min), and location in sonication bath (two vectors). The response biomarkers were cortisol, fibronectin, human serum albumin, involucrin, keratin-6 and keratins 1, 10. Skin sampling sites were also evaluated as sources of variation. RESULTS There was no single set of extraction conditions in our experiments that maximized recovery of all the biomarkers. SDS level had the most consistently significant (P<0.05) and directional effects on biomarker recoveries. In general, higher SDS resulted in higher recovery of all biomarkers. There was less consistency and fewer significant results for the other extraction factors. CONCLUSIONS These data enable us to better manage SkinMAP studies and interpret their results. The use of 1.5 mL PBS containing 0.2% SDS and 0.5% PG with 30 min sonication at low (near 4 degrees C) temperature is optimal for the quantitation of a range of SkinMAP analytes. In order to protect researchers from obtaining inflated false positive rates, it is crucial to design such studies and analyze the data using appropriate statistical methodology, especially for those studies involving only a small number of subjects.
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Affiliation(s)
- S W Hendrix
- The Procter & Gamble Company, Beauty Care, Sharon Woods Innovation Center, Cincinnati, OH 45241, USA.
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Zhong B, Strnad P, Toivola DM, Tao GZ, Ji X, Greenberg HB, Omary MB. Reg-II is an exocrine pancreas injury-response product that is up-regulated by keratin absence or mutation. Mol Biol Cell 2007; 18:4969-78. [PMID: 17898082 PMCID: PMC2096595 DOI: 10.1091/mbc.e07-02-0180] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The major keratins in the pancreas and liver are keratins 8 and 18 (K8/K18), but their function seemingly differs in that liver K8/K18 are essential cytoprotective proteins, whereas pancreatic K8/K18 are dispensable. This functional dichotomy raises the hypothesis that K8-null pancreata may undergo compensatory cytoprotective gene expression. We tested this hypothesis by comparing the gene expression profile in pancreata of wild-type and K8-null mice. Most prominent among the up-regulated genes in K8-null pancreas was mRNA for regenerating islet-derived (Reg)-II, which was confirmed by quantitative reverse transcription-polymerase chain reaction and by an anti-Reg-II peptide antibody we generated. Both K8-null and wild-type mice express Reg-II predominantly in acinar cells as determined by in situ hybridization and immunostaining. Analysis of Reg-II expression in various keratin-related transgenic mouse models showed that its induction also occurs in response to keratin cytoplasmic filament collapse, absence, or ablation of K18 Ser52 but not Ser33 phosphorylation via Ser-to-Ala mutation, which represent situations associated with predisposition to liver but not pancreatic injury. In wild-type mice, Reg-II is markedly up-regulated in two established pancreatitis models in response to injury and during the recovery phase. Thus, Reg-II is a likely mouse exocrine pancreas cytoprotective candidate protein whose expression is regulated by keratin filament organization and phosphorylation.
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Affiliation(s)
- Bihui Zhong
- *Department of Medicine, Palo Alto Veterans Affairs Medical Center, Palo Alto, CA 94304
- Stanford University Digestive Disease Center, Stanford, CA 94305
- Division of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China; and
| | - Pavel Strnad
- *Department of Medicine, Palo Alto Veterans Affairs Medical Center, Palo Alto, CA 94304
- Stanford University Digestive Disease Center, Stanford, CA 94305
| | - Diana M. Toivola
- *Department of Medicine, Palo Alto Veterans Affairs Medical Center, Palo Alto, CA 94304
- Stanford University Digestive Disease Center, Stanford, CA 94305
- Biosciences, Department of Biology, Abo Akademi University, FI-20520, Turku, Finland
| | - Guo-Zhong Tao
- *Department of Medicine, Palo Alto Veterans Affairs Medical Center, Palo Alto, CA 94304
- Stanford University Digestive Disease Center, Stanford, CA 94305
| | - Xuhuai Ji
- *Department of Medicine, Palo Alto Veterans Affairs Medical Center, Palo Alto, CA 94304
- Stanford University Digestive Disease Center, Stanford, CA 94305
| | - Harry B. Greenberg
- *Department of Medicine, Palo Alto Veterans Affairs Medical Center, Palo Alto, CA 94304
- Stanford University Digestive Disease Center, Stanford, CA 94305
| | - M. Bishr Omary
- *Department of Medicine, Palo Alto Veterans Affairs Medical Center, Palo Alto, CA 94304
- Stanford University Digestive Disease Center, Stanford, CA 94305
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Komine M, Karakawa M, Takekoshi T, Sakurai N, Minatani Y, Mitsui H, Tada Y, Saeki H, Asahina A, Tamaki K. Early inflammatory changes in the "perilesional skin" of psoriatic plaques: is there interaction between dendritic cells and keratinocytes? J Invest Dermatol 2007; 127:1915-22. [PMID: 17446902 DOI: 10.1038/sj.jid.5700799] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Early inflammatory changes in psoriatic plaques were investigated immunohistochemically by studying the normal-appearing skin adjacent to the plaques (perilesional skin), lesional skin, and distant uninvolved skin from psoriasis patients. Perilesional epidermis contained numerous CD1a-positive Langerhans cells, some of which expressed HLA-DR, CD83, CD80, and CD86, at the same time expressing Langerin. There were also numerous CD83-positive, CD11c-positive, Langerin-negative dendritic cells (DCs) in the epidermal-dermal junction of perilesional skin. CD3-positive T lymphocytes were sparse in the perilesional skin. Perilesional epidermis expressed keratin K6 and K16, inflammatory keratins, and C/EBPbeta, a transcription factor related to inflammatory cytokines. Our results demonstrated the abundant distribution of activated DCs in the perilesional skin of psoriatic plaques, where early inflammatory changes occur in the epidermal keratinocytes, which suggests their involvement in the provocation of epidermal inflammation in the perilesional epidermis and further pathogenic roles in the formation of psoriatic plaques.
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Affiliation(s)
- Mayumi Komine
- Department of Dermatology, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.
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Büchau AS, Hassan M, Kukova G, Lewerenz V, Kellermann S, Würthner JU, Wolf R, Walz M, Gallo RL, Ruzicka T. S100A15, an antimicrobial protein of the skin: regulation by E. coli through Toll-like receptor 4. J Invest Dermatol 2007; 127:2596-604. [PMID: 17625598 DOI: 10.1038/sj.jid.5700946] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
E. coli is a gram-negative bacterium rarely found on human skin. We investigated whether direct interaction of E. coli with keratinocytes might induce an innate immune response through recognition by pattern recognition receptors. The capacity of E. coli to activate innate immune responses and IL-8 induction was investigated. We found that E. coli significantly induced human S100A7 and S100A15 transcript abundance and IL-8 release in cultured primary human keratinocytes. S100A15 is a member of the S100 protein family with previously unknown function. E. coli induced effects could be inhibited by neutralizing Toll-like receptor 4 (TLR4) antibodies, suggesting that E. coli-induced IL-8 and S100A15 expression in human keratinocytes are TLR4 dependent. TLR4-/- mice lacked elevated mS100A15 expression after infection with E. coli in contrast to wild-type mice. In vitro, human S100A15 displayed antimicrobial activity against E. coli. Our findings suggest that E. coli modulates S100A15 and IL-8 expression of keratinocytes by recognition through TLR4.
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Affiliation(s)
- Amanda S Büchau
- Department of Dermatology, Heinrich-Heine-University, Duesseldorf, Germany.
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Chen YJ, Wang YN, Chang WC. ERK2-mediated C-terminal serine phosphorylation of p300 is vital to the regulation of epidermal growth factor-induced keratin 16 gene expression. J Biol Chem 2007; 282:27215-27228. [PMID: 17623675 DOI: 10.1074/jbc.m700264200] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We previously reported that the epidermal growth factor (EGF) regulates the gene expression of keratin 16 by activating the extracellular signal-regulated kinase 1 and 2 (ERK1/2) signaling which in turn enhances the recruitment of p300 to the keratin 16 promoter. The recruited p300 functionally cooperates with Sp1 and c-Jun to regulate the gene expression of keratin 16. This study investigated in detail the molecular events incurred upon p300 whereby EGF caused an enhanced interaction between p300 and Sp1. EGF apparently induced time- and dose-dependent phosphorylation of p300, both in vitro and in vivo, through the activation of ERK2. The six potential ERK2 phosphorylation sites, including three threonine and three serine residues as revealed by sequential analysis, were first identified in vitro. Confirmation of these six sites in vivo indicated that these three serine residues (Ser-2279, Ser-2315, and Ser-2366) on the C terminus of p300 were the major signaling targets of EGF. Furthermore, the C-terminal serine phosphorylation of p300 stimulated its histone acetyltransferase activity and enhanced its interaction with Sp1. These serine phosphorylation sites on p300 controlled the p300 recruitment to the keratin 16 promoter. When all three serine residues on p300 were replaced by alanine, EGF could no longer induce the gene expression of keratin 16. Taken together, these results strongly suggested that the ERK2-mediated C-terminal serine phosphorylation of p300 was a key event in the regulation of EGF-induced keratin 16 expression. These results also constituted the first report identifying the unique p300 phosphorylation sites induced by ERK2 in vivo.
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Affiliation(s)
- Yun-Ju Chen
- Department of Pharmacology, National Cheng Kung University, Tainan 701, Taiwan; Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
| | - Ying-Nai Wang
- Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas 77030
| | - Wen-Chang Chang
- Department of Pharmacology, National Cheng Kung University, Tainan 701, Taiwan; Center for Gene Regulation and Signal Transduction Research, National Cheng Kung University, Tainan 701, Taiwan and the.
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Fries F, Nazarenko I, Hess J, Claas A, Angel P, Zöller M. CEBPbeta, JunD and c-Jun contribute to the transcriptional activation of the metastasis-associated C4.4A gene. Int J Cancer 2007; 120:2135-47. [PMID: 17278103 DOI: 10.1002/ijc.22447] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The glycosylphosphatidylinositol-anchored molecule C4.4A, which shares structural features with uPAR, is frequently expressed on carcinomas with upregulated expression during tumor progression. Moreover, rare expression on nontransformed epithelial cells is strongly increased during tissue remodeling, e.g., during wound healing. This strictly regulated expression prompted us to define transcriptional activation of the C4.4A gene. C4.4A transcription was analyzed in 2 syngenic rat tumor cell lines with low or high metastatic potential, respectively. Though genomic C4.4A DNA was present in both lines, C4.4A mRNA and transcription of a reporter construct containing the C4.4A promoter was only observed in the metastasizing subline. Deletions and point mutations in the C4.4A promoter-driven reporter construct revealed that activation of the TATA-less, GC-rich core promoter (-1 to -50 bp) does not suffice to initiate transcription that requires coactivation of a proximal response element (-71 to -88 bp) and can be further increased by more distal response elements (-89 to -133 bp). Mobility-shift and cotransfection studies showed that Sp3 binding enhances C4.4A transcription, whereas potential Sp1 binding sites were ineffective. C4.4A transcription essentially requires C/EBPbeta binding to a TRE/CCAAT composite element (-71 to -88 bp) as measured by ChIP assay. C4.4A transcription is strikingly enhanced by cotransfection with JunD or c-Jun, such that C4.4A is most strongly transcribed even in the C4.4A-negative tumor cell line after cotransfection with C/EBPbeta plus JunD or c-Jun. Thus, upregulation of C/EBPbeta during tumor progression and wound repair may well provide a sufficient trigger for transcription of the C4.4A gene.
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Affiliation(s)
- Frank Fries
- Departments of Tumor Progression and Immune Defense, German Cancer Research Center, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany
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Rittié L, Kansra S, Stoll SW, Li Y, Gudjonsson JE, Shao Y, Michael LE, Fisher GJ, Johnson TM, Elder JT. Differential ErbB1 signaling in squamous cell versus basal cell carcinoma of the skin. THE AMERICAN JOURNAL OF PATHOLOGY 2007; 170:2089-99. [PMID: 17525275 PMCID: PMC1899432 DOI: 10.2353/ajpath.2007.060537] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/22/2007] [Indexed: 11/20/2022]
Abstract
In this study, we examined ErbB1 signaling in human basal and squamous cell carcinomas (BCC and SCC) of the skin in vivo. We used enzyme-linked immunosorbent assay, laser capture microdissection-coupled real-time reverse transcriptase-polymerase chain reaction, and immunohistochemistry to assess expression and activation levels of ErbB1 protein, ligands, and potential downstream effectors, in BCC and SCC tumors, stroma, and adjacent epidermis. Although total ErbB1 protein and mRNA were similar in cancerous and normal skin, we found that ErbB1 activation (phospho-Tyr(1068)) was greater in bulk SCC versus BCC or normal skin. In addition, three ErbB1 ligand transcripts (amphiregulin, heparin-binding epidermal growth factor-like growth factor, and transforming growth factor-alpha) were up-regulated in tumor cells of SCC but not BCC. Expression of these ligands was also increased in asymptomatic epidermis adjacent to both SCC and BCC, relative to normal skin. Interestingly, betacellulin transcript levels were inversely regulated compared with the other ligands. Consistently, downstream ErbB1 effectors (Erk1/2 and Akt) were activated in tumor cells of SCC but not of BCC and in adjacent epidermis of both BCC and SCC. These results demonstrate that ErbB1 signaling is hyperactive in tumor cells of SCC but not of BCC and in nearby asymptomatic epidermis of both tumor types. Our results suggest that targeting ErbB1 signaling might be of benefit in the treatment of SCC.
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Affiliation(s)
- Laure Rittié
- Department of Dermatology, University of Michigan Medical Center, 1500 East Medical Center Drive, Ann Arbor, MI 48109-0932, USA
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Tracz MJ, Alam J, Nath KA. Physiology and pathophysiology of heme: implications for kidney disease. J Am Soc Nephrol 2007; 18:414-20. [PMID: 17229906 DOI: 10.1681/asn.2006080894] [Citation(s) in RCA: 242] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
An iron-containing, tetrapyrrole ring, heme is an essential prosthetic group in an array of proteins that comprehensively affect cellular function and metabolism; yet "free" heme in sufficient amounts can be damaging to the kidney and other organs because of its bioreactivity and pro-oxidant effects. This review discusses the cellular metabolism of heme in health and disease and covers such areas as the synthesis of heme and its utilization in heme proteins; mechanisms underlying the toxicity of heme; and the extent to which pathophysiologic processes, such as renal incorporation of heme proteins or destabilization of intracellular heme proteins, increase intracellular levels of heme and provoke renal injury. The main catabolic process that degrades heme, the heme oxygenase (HO) system, is reviewed, and evidence for the protective effects of HO-1 against acute and chronic heme/heme protein-induced renal injury is summarized. Finally, current views regarding the molecular basis for heme-induced upregulation of HO-1 are discussed.
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Affiliation(s)
- Michal J Tracz
- Mayo Clinic, 200 First Street, SW, Guggenheim 542, Rochester, MN 55905, USA
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Wang L, Srinivasan S, Theiss AL, Merlin D, Sitaraman SV. Interleukin-6 induces keratin expression in intestinal epithelial cells: potential role of keratin-8 in interleukin-6-induced barrier function alterations. J Biol Chem 2007; 282:8219-27. [PMID: 17213200 DOI: 10.1074/jbc.m604068200] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Keratin 8 (K8) and keratin-18 (K18) are the major intermediate filament proteins in the intestinal epithelia. The regulation and function of keratin in the intestinal epithelia is largely unknown. In this study we addressed the role and regulation of K8 and K18 expression by interleukin 6 (IL-6). Caco2-BBE cell line and IL-6 null mice were used to study the effect of IL-6 on keratin expression. Keratin expression was studied by Northern blot, Western blot, and confocal microscopy. Paracellular permeability was assessed by apical-to-basal transport of a fluorescein isothiocyanate dextran probe (FD-4). K8 was silenced using the small interfering RNA approach. IL-6 significantly up-regulated mRNA and protein levels of K8 and K18. Confocal microscopy showed a reticular pattern of intracellular keratin localized to the subapical region after IL-6 treatment. IL-6 also induced serine phosphorylation of K8. IL-6 decreased paracellular flux of FD-4 compared with vehicle-treated monolayers. K8 silencing abolished the decrease in paracellular permeability induced by IL-6. Administration of dextran sodium sulfate (DSS) significantly increased intestinal permeability in IL-6-/- mice compared with wild type mice given DSS. Collectively, our data demonstrate that IL-6 regulates the colonic expression of K8 and K18, and K8/K18 mediates barrier protection by IL-6 under conditions where intestinal barrier is compromised. Thus, our data uncover a novel function of these abundant cytoskeletal proteins, which may have implications in intestinal disorders such as inflammatory bowel disease wherein barrier dysfunction underlies the inflammatory response.
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Affiliation(s)
- Lixin Wang
- Division of Digestive Diseases, Department of Medicine, Emory University, Atlanta, Georgia 30322, USA
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Alam J, Cook JL. How many transcription factors does it take to turn on the heme oxygenase-1 gene? Am J Respir Cell Mol Biol 2006; 36:166-74. [PMID: 16990612 DOI: 10.1165/rcmb.2006-0340tr] [Citation(s) in RCA: 301] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The ability to communicate with the environment and respond to changes--particularly those of an adverse nature--within that environment is critical for cell function and survival. A key component of the overall cellular stress response includes adjustments in the gene expression program in favor of proteins that manifest activities capable of frustrating and eventually eliminating the molecular constituents of the stress condition. One protein providing such cytoprotective activity is heme oxygenase-1 (HO-1), an enzyme that catalyzes the rate-limiting reaction in heme catabolism (i.e., the oxidative cleavage of b-type heme molecules to yield equimolar quantities of biliverdin IXalpha, carbon monoxide, and iron). Because of the potent antioxidant, anti-inflammatory, and signaling properties of the reaction products, the HO-1 gene (hmox1) is frequently activated under a variety of cellular stress conditions. Cells use multiple signaling pathways and transcription factors to fine-tune their response to a specific circumstance. Among these factors, members of the heat-shock factor, nuclear factor-kappaB, nuclear factor-erythroid 2, and activator protein-1 families are arguably the most important regulators of the cellular stress response in vertebrates. Although there is functional overlap between individual families, each broadly regulates different aspects of the cellular stress response and thus, with some exceptions, modulates the expression of different sets of targets genes. To the best of our knowledge, hmox1 is unique in that it is proposed to be directly regulated by all four of these stress-responsive transcription factors. In this article we provide a review and analysis of the data supporting this proposition.
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Affiliation(s)
- Jawed Alam
- Department of Molecular Genetics, Ochsner Medical Center, New Orleans, LA 70121, USA.
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Radoja N, Gazel A, Banno T, Yano S, Blumenberg M. Transcriptional profiling of epidermal differentiation. Physiol Genomics 2006; 27:65-78. [PMID: 16822832 DOI: 10.1152/physiolgenomics.00031.2006] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
In epidermal differentiation basal keratinocytes detach from the basement membrane, stop proliferating, and express a new set of structural proteins and enzymes, which results in an impermeable protein/lipid barrier that protects us. To define the transcriptional changes essential for this process, we purified large quantities of basal and suprabasal cells from human epidermis, using the expression of beta4 integrin as the discriminating factor. The expected expression differences in cytoskeletal, cell cycle, and adhesion genes confirmed the effective separation of the cell populations. Using DNA microarray chips, we comprehensively identify the differences in genes expressed in basal and differentiating layers of the epidermis, including the ECM components produced by the basal cells, the proteases in both the basal and suprabasal cells, and the lipid and steroid metabolism enzymes in suprabasal cells responsible for the permeability barrier. We identified the signaling pathways specific for the two populations and found two previously unknown paracrine and one juxtacrine signaling pathway operating between the basal and suprabasal cells. Furthermore, using specific expression signatures, we identified a new set of late differentiation markers and mapped their chromosomal loci, as well as a new set of melanocyte-specific markers. The data represent a quantum jump in understanding the mechanisms of epidermal differentiation.
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Affiliation(s)
- Nada Radoja
- Department of Dermatology, New York University School of Medicine, New York, New York, USA
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Grimm SL, Bu W, Longley MA, Roop DR, Li Y, Rosen JM. Keratin 6 is not essential for mammary gland development. Breast Cancer Res 2006; 8:R29. [PMID: 16790075 PMCID: PMC1557733 DOI: 10.1186/bcr1504] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2006] [Revised: 04/26/2006] [Accepted: 05/25/2006] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Keratin 6 (K6) has previously been identified as a marker of early mammary gland development and has also been proposed to be a marker of mammary gland progenitor cells. However, the function of K6 in the mammary gland was not known, so we examined the expression pattern of the protein during both embryonic and postnatal mammary development, as well as the mammary gland phenotype of mice that were null for both K6a and K6b isoforms. METHOD Immunostaining was performed to determine the expression pattern of K6a throughout mammary gland development, from the embryonic mammary bud to lactation. Double immunofluorescence was used to co-localize K6 with known markers of mammary gland development. Wild-type and K6ab-null mammary tissues were transplanted into the cleared fat pads of nude mice and the outgrowths were analyzed for morphology by whole-mount staining and for markers of mammary epithelium by immunostaining. Finally, progesterone receptor (PR) and bromodeoxyuridine co-localization was quantified by double immunofluorescence in wild-type and K6ab-null mammary outgrowths. RESULTS Here we report that K6 is expressed earlier than described previously, by embryonic day 16.5. K6a is the predominant isoform expressed in the mammary gland, localized in the body cells and luminal epithelial cells but not in the cap cells or myoepithelial cells. Co-localization studies showed that most K6a-positive cells express steroid receptors but do not proliferate. When both the K6a and K6b genes are deleted, mammary gland development appears normal, with similar expression of most molecular markers examined in both the pubertal gland and the mature gland. Loss of K6a and K6b, however, leads to an increase in the number of steroid-receptor-positive cells, and increased co-localization of steroid receptor expression and proliferation was observed. CONCLUSION Although K6a was not essential for mammary gland development, loss of both K6a and K6b resulted in an increase in PR-positive mammary epithelial cells and decreased proliferation after exposure to steroid hormones. There was also increased co-localization of PR and bromodeoxyuridine, suggesting alterations in patterning events important for normal lobuloalveolar development.
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Affiliation(s)
- Sandra L Grimm
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Wen Bu
- Breast Center, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Mary Ann Longley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Dennis R Roop
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Yi Li
- Breast Center, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Jeffrey M Rosen
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
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Dajee M, Muchamuel T, Schryver B, Oo A, Alleman-Sposeto J, De Vry CG, Prasad S, Ruhrmund D, Shyamsundar R, Mutnick D, Mai K, Le T, Parham C, Zhang J, Komuves L, Colby T, Hudak S, McEvoy LM, Ehrhardt RO. Blockade of experimental atopic dermatitis via topical NF-kappaB decoy oligonucleotide. J Invest Dermatol 2006; 126:1792-803. [PMID: 16628194 DOI: 10.1038/sj.jid.5700307] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Atopic dermatitis (AD) is a common chronic skin inflammatory disease. Long-term use of topical corticosteroids in skin inflammation poses risks of systemic and local side effects. The NF-kappaB transcription factor family plays a central role in the progression and maintenance of AD. This study explores the possibility of using topical NF-kappaB Decoy as a novel therapeutic alternative for targeting Th1/Th2-driven skin inflammation in experimental AD. A high-affinity, topical NF-kappaB Decoy developed for human efficacy demonstrates: (i) efficient NF-kappaB Decoy penetration in pig skin, (ii) NF-kappaB Decoy nuclear localization in keratinocytes and key immune cells, and (iii) potent "steroid-like" efficacy in a chronic dust-mite antigen skin inflammation treatment model. NF-kappaB Decoy exerts its anti-inflammatory action through the effective inhibition of essential regulators of inflammation and by induction of apoptosis of key immune cells. Unlike betamethasone valerate (BMV), long-term NF-kappaB Decoy treatment does not induce skin atrophy. Moreover, topical NF-kappaB Decoy, in contrast to BMV, restores compromised stratum corneum integrity and barrier function. Steroid withdrawal causes rapid rebound of inflammation, while the NF-kappaB Decoy therapeutic benefit was maintained for weeks. Thus, topical NF-kappaB Decoy provides a novel mechanism of reducing chronic skin inflammation with improved skin homeostasis and minimal side effects.
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Affiliation(s)
- Maya Dajee
- Department of Research, Corgentech. Inc., South San Francisco, California, USA
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Wang YN, Chen YJ, Chang WC. Activation of extracellular signal-regulated kinase signaling by epidermal growth factor mediates c-Jun activation and p300 recruitment in keratin 16 gene expression. Mol Pharmacol 2005; 69:85-98. [PMID: 16214953 DOI: 10.1124/mol.105.016220] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In studies of gene regulation of keratin 16, we reported previously that simian virus 40 promoter factor 1 shows a functional cooperation with c-Jun and coactivators p300/CBP in driving the transcriptional regulation of epidermal growth factor (EGF)-induced keratin 16 gene expression. In the present study, we found that the stimulated expression of keratin 16 by EGF was mediated mainly through the mitogen-activated protein kinase kinase-extracellular signal-regulated kinases 1 and 2 (ERK1/2) signaling pathway. Ser63 and Ser73 on the c-Jun NH(2)-terminal transactivation domain could be phosphorylated in cells treated with EGF; nevertheless, we found that the c-Jun COOH terminus played a pivotal role in EGF-induced expression of keratin 16. The activation of keratin 16 by EGF treatment could not be enhanced by the overexpression of myc-c-JunK3R, in which three putative acetylation lysine residues on the c-Jun COOH terminus were all mutated into arginines, suggesting that c-Jun acetylation on the COOH terminus might partially play a functional role in this system. In addition, by using a chromatin immunoprecipitation assay and a DNA affinity precipitation assay, EGF treatment up-regulated the p300 recruitment through ERK signaling to the promoter region in regulating keratin 16 transcriptional activity. Furthermore, the enhancement of acetyl-histone H3 to the keratin 16 chromatin promoter induced by EGF was also mediated via ERK activation. In conclusion, these results strongly suggest that both c-Jun induction and p300 recruitment to gene promoter, mediated through ERK activation, played an essential role in regulating keratin 16 gene expression by EGF. p300 mediated and regulated EGF-induced keratin 16 gene expression, at least in part, through multiple mechanisms, including a selective acetylation of c-Jun and histone H3.
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Affiliation(s)
- Ying-Nai Wang
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Morasso MI, Tomic-Canic M. Epidermal stem cells: the cradle of epidermal determination, differentiation and wound healing. Biol Cell 2005; 97:173-83. [PMID: 15715523 PMCID: PMC1283090 DOI: 10.1042/bc20040098] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The field of epidermal stem cells has dramatically advanced in the last decade, leading to a better understanding of the molecular factors, signalling pathways and cellular events that identify and characterize stem cells, thus revealing their immense potential for therapeutic use. Furthermore, multipotent epidermal stem cells present the major advantage of easy accessibility with the discovery of their specific location within the bulge of the hair follicle. This review focuses on the most recent findings on epidermal stem cells, and their potential role in initial epidermal commitment, differentiation and wound healing processes in the skin.
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Affiliation(s)
- Maria I Morasso
- Developmental Skin Biology Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
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Boniface K, Bernard FX, Garcia M, Gurney AL, Lecron JC, Morel F. IL-22 inhibits epidermal differentiation and induces proinflammatory gene expression and migration of human keratinocytes. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2005; 174:3695-702. [PMID: 15749908 DOI: 10.4049/jimmunol.174.6.3695] [Citation(s) in RCA: 633] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
IL-22 belongs to a family of cytokines structurally related to IL-10, including IL-19, IL-20, IL-24, and IL-26. In contrast to IL-10, IL-22 has proinflammatory activities. IL-22 signals through a class II cytokine receptor composed of an IL-22-binding chain, IL-22RA1, and the IL-10RB subunit, which is shared with the IL-10R. In the present study, we show that short-term cultured human epidermal keratinocytes express a functional IL-22R but no IL-10R. Accordingly, IL-22 but not IL-10 induces STAT3 activation in keratinocytes. Using a cDNA array screening approach, real-time RT-PCR, and Western blot analysis, we demonstrate that IL-22 up-regulates, in a dose-dependent manner, the expression of S100A7, S100A8, S100A9, a group of proinflammatory molecules belonging to the S100 family of calcium-binding proteins, as well as the matrix metalloproteinase 3, the platelet-derived growth factor A, and the CXCL5 chemokine. In addition, IL-22 induces keratinocyte migration in an in vitro injury model and down-regulates the expression of at least seven genes associated with keratinocyte differentiation. Finally, we show that IL-22 strongly induces hyperplasia of reconstituted human epidermis. Taken together, these results suggest that IL-22 plays an important role in skin inflammatory processes and wound healing.
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Affiliation(s)
- Katia Boniface
- Laboratoire Cytokines et Inflammation, UPRES EA 3806, Pôle Biologie Santé, Université de Poitiers, Poitiers, France
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Preciado D, Caicedo E, Jhanjee R, Silver R, Harris G, Juhn SK, Choo DI, Ondrey F. Pseudomonas aeruginosa Lipopolysaccharide Induction of Keratinocyte Proliferation, NF-κB, and Cyclin D1 Is Inhibited by Indomethacin. THE JOURNAL OF IMMUNOLOGY 2005; 174:2964-73. [PMID: 15728509 DOI: 10.4049/jimmunol.174.5.2964] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
NF-kappaB is activated during acute inflammatory states as well as in other injury response disease states. Several pathologic states in squamous tissue injury response are characterized by increased squamous proliferation. This study was performed to investigate the hypothesis that Pseudomonas aeruginosa LPS is able to activate a proliferative phenotype in squamous cells via NF-kappaB induction and that this NF-kappaB-mediated response may be abrogated with the classic anti-inflammatory agent indomethacin. EMSA, luciferase reporter gene experiments, Western blots, and cellular proliferation assays were performed in normal and transformed human keratinocytes after stimulation with P. aeruginosa LPS. EMSA and luciferase reporter gene assays showed a 3- to 5-fold induction of active NF-kappaB in human keratinocyte cell lines after stimulation with P. aeruginosa LPS. The stimulation correlated with significantly increased cellular proliferation. As one potential mechanism for this increase in proliferation, an NF-kappaB-specific activation of cyclin D1 was observed. Both the NF-kappaB induction and proliferation response were inhibited with indomethacin and in dominant negative stable transfection clones. P. aeruginosa LPS activates proliferation of human keratinocytes, potentially through the induction of NF-kappaB and cyclin D1. These findings suggest that bacterial components can contribute to proliferative disease states in squamous epithelium through NF-kappaB activation.
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Affiliation(s)
- Diego Preciado
- Department of Otolaryngology-Head and Neck Surgery, Molecular Oncology Program, University of Minnesota, Minneapolis, MN 55455, USA
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Banno T, Gazel A, Blumenberg M. Pathway-specific profiling identifies the NF-kappa B-dependent tumor necrosis factor alpha-regulated genes in epidermal keratinocytes. J Biol Chem 2005; 280:18973-80. [PMID: 15722350 DOI: 10.1074/jbc.m411758200] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Identification of tumor necrosis factor alpha (TNF alpha) as the key agent in inflammatory disorders led to new therapies specifically targeting TNF alpha and avoiding many side effects of earlier anti-inflammatory drugs. However, because of the wide spectrum of systems affected by TNF alpha, drugs targeting TNF alpha have a potential risk of delaying wound healing, secondary infections, and cancer. Indeed, increased risks of tuberculosis and carcinogenesis have been reported as side effects after anti-TNF alpha therapy. TNF alpha regulates many processes (e.g. immune response, cell cycle, and apoptosis) through several signal transduction pathways that convey the TNF alpha signals to the nucleus. Hypothesizing that specific TNF alpha-dependent pathways control specific processes and that inhibition of a specific pathway may yield even more precisely targeted therapies, we used oligonucleotide microarrays and parthenolide, an NF-kappa B-specific inhibitor, to identify the NF-kappa B-dependent set of the TNF alpha-regulated genes in human epidermal keratinocytes. Expression of approximately 40% of all TNF alpha-regulated genes depends on NF-kappa B; 17% are regulated early (1-4 h post-treatment), and 23% are regulated late (24-48 h). Cytokines and apoptosis-related and cornification proteins belong to the "early" NF-kappa B-dependent group, and antigen presentation proteins belong to the "late" group, whereas most cell cycle, RNA-processing, and metabolic enzymes are not NF-kappa B-dependent. Therefore, inflammation, immunomodulation, apoptosis, and differentiation are on the NF-kappa B pathway, and cell cycle, metabolism, and RNA processing are not. Most early genes contain consensus NF-kappaB binding sites in their promoter DNA and are, presumably, directly regulated by NF-kappa B, except, curiously, the cornification markers. Using siRNA silencing, we identified cFLIP/CFLAR as an essential NF-kappa B-dependent antiapoptotic gene. The results confirm our hypothesis, suggesting that inhibiting a specific TNF alpha-dependent signaling pathway may inhibit a specific TNF alpha-regulated process, leaving others unaffected. This could lead to more specific anti-inflammatory agents that are both more effective and safer.
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Affiliation(s)
- Tomohiro Banno
- Department of Dermatology, New York University School of Medicine, New York, New York 10016, USA
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