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Wils LJ, Buijze M, Stigter-van Walsum M, Brink A, van Kempen BE, Peferoen L, Brouns ER, de Visscher JGAM, van der Meij EH, Bloemena E, Poell JB, Brakenhoff RH. Genomic Engineering of Oral Keratinocytes to Establish In Vitro Oral Potentially Malignant Disease Models as a Platform for Treatment Investigation. Cells 2024; 13:710. [PMID: 38667326 PMCID: PMC11049138 DOI: 10.3390/cells13080710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/11/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
Precancerous cells in the oral cavity may appear as oral potentially malignant disorders, but they may also present as dysplasia without visual manifestation in tumor-adjacent tissue. As it is currently not possible to prevent the malignant transformation of these oral precancers, new treatments are urgently awaited. Here, we generated precancer culture models using a previously established method for the generation of oral keratinocyte cultures and incorporated CRISPR/Cas9 editing. The generated cell lines were used to investigate the efficacy of a set of small molecule inhibitors. Tumor-adjacent mucosa and oral leukoplakia biopsies were cultured and genetically characterized. Mutations were introduced in CDKN2A and TP53 using CRISPR/Cas9 and combined with the ectopic activation of telomerase to generate cell lines with prolonged proliferation. The method was tested in normal oral keratinocytes and tumor-adjacent biopsies and subsequently applied to a large set of oral leukoplakia biopsies. Finally, a subset of the immortalized cell lines was used to assess the efficacy of a set of small molecule inhibitors. Culturing and genomic engineering was highly efficient for normal and tumor-adjacent oral keratinocytes, but success rates in oral leukoplakia were remarkably low. Knock-out of CDKN2A in combination with either the activation of telomerase or knock-out of TP53 seemed a prerequisite for immortalization. Prolonged culturing was accompanied by additional genetic aberrations in these cultures. The generated cell lines were more sensitive than normal keratinocytes to small molecule inhibitors of previously identified targets. In conclusion, while very effective for normal keratinocytes and tumor-adjacent biopsies, the success rate of oral leukoplakia cell culturing methods was very low. Genomic engineering enabled the prolonged culturing of OL-derived keratinocytes but was associated with acquired genetic changes. Further studies are required to assess to what extent the immortalized cultures faithfully represent characteristics of the cells in vivo.
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Affiliation(s)
- Leon J. Wils
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Oral and Maxillofacial Surgery and Oral Pathology, 1081 HV Amsterdam, The Netherlands; (L.J.W.); (J.G.A.M.d.V.); (E.B.)
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Otolaryngology and Head & Neck Surgery, 1081 HV Amsterdam, The Netherlands (A.B.)
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Pathology, 1081 HV Amsterdam, The Netherlands;
- Academic Centre for Dentistry Amsterdam (ACTA), 1081 LA Amsterdam, The Netherlands
- Cancer Center Amsterdam (CCA), Cancer Biology and Immunology, 1081 HV Amsterdam, The Netherlands
| | - Marijke Buijze
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Otolaryngology and Head & Neck Surgery, 1081 HV Amsterdam, The Netherlands (A.B.)
- Cancer Center Amsterdam (CCA), Cancer Biology and Immunology, 1081 HV Amsterdam, The Netherlands
| | - Marijke Stigter-van Walsum
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Otolaryngology and Head & Neck Surgery, 1081 HV Amsterdam, The Netherlands (A.B.)
- Cancer Center Amsterdam (CCA), Cancer Biology and Immunology, 1081 HV Amsterdam, The Netherlands
| | - Arjen Brink
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Otolaryngology and Head & Neck Surgery, 1081 HV Amsterdam, The Netherlands (A.B.)
- Cancer Center Amsterdam (CCA), Cancer Biology and Immunology, 1081 HV Amsterdam, The Netherlands
| | - Britt E. van Kempen
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Otolaryngology and Head & Neck Surgery, 1081 HV Amsterdam, The Netherlands (A.B.)
- Cancer Center Amsterdam (CCA), Cancer Biology and Immunology, 1081 HV Amsterdam, The Netherlands
| | - Laura Peferoen
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Pathology, 1081 HV Amsterdam, The Netherlands;
| | - Elisabeth R. Brouns
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Oral and Maxillofacial Surgery and Oral Pathology, 1081 HV Amsterdam, The Netherlands; (L.J.W.); (J.G.A.M.d.V.); (E.B.)
- Academic Centre for Dentistry Amsterdam (ACTA), 1081 LA Amsterdam, The Netherlands
| | - Jan G. A. M. de Visscher
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Oral and Maxillofacial Surgery and Oral Pathology, 1081 HV Amsterdam, The Netherlands; (L.J.W.); (J.G.A.M.d.V.); (E.B.)
- Academic Centre for Dentistry Amsterdam (ACTA), 1081 LA Amsterdam, The Netherlands
| | - Erik H. van der Meij
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Oral and Maxillofacial Surgery and Oral Pathology, 1081 HV Amsterdam, The Netherlands; (L.J.W.); (J.G.A.M.d.V.); (E.B.)
- Academic Centre for Dentistry Amsterdam (ACTA), 1081 LA Amsterdam, The Netherlands
| | - Elisabeth Bloemena
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Oral and Maxillofacial Surgery and Oral Pathology, 1081 HV Amsterdam, The Netherlands; (L.J.W.); (J.G.A.M.d.V.); (E.B.)
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Otolaryngology and Head & Neck Surgery, 1081 HV Amsterdam, The Netherlands (A.B.)
- Academic Centre for Dentistry Amsterdam (ACTA), 1081 LA Amsterdam, The Netherlands
- Cancer Center Amsterdam (CCA), Cancer Biology and Immunology, 1081 HV Amsterdam, The Netherlands
| | - Jos B. Poell
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Otolaryngology and Head & Neck Surgery, 1081 HV Amsterdam, The Netherlands (A.B.)
- Cancer Center Amsterdam (CCA), Cancer Biology and Immunology, 1081 HV Amsterdam, The Netherlands
| | - Ruud H. Brakenhoff
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Otolaryngology and Head & Neck Surgery, 1081 HV Amsterdam, The Netherlands (A.B.)
- Cancer Center Amsterdam (CCA), Cancer Biology and Immunology, 1081 HV Amsterdam, The Netherlands
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2
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Prime SS, Cirillo N, Parkinson EK. Escape from Cellular Senescence Is Associated with Chromosomal Instability in Oral Pre-Malignancy. BIOLOGY 2023; 12:biology12010103. [PMID: 36671795 PMCID: PMC9855962 DOI: 10.3390/biology12010103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 01/12/2023]
Abstract
An escape from cellular senescence through the development of unlimited growth potential is one of the hallmarks of cancer, which is thought to be an early event in carcinogenesis. In this review, we propose that the molecular effectors of senescence, particularly the inactivation of TP53 and CDKN2A, together with telomere attrition and telomerase activation, all lead to aneuploidy in the keratinocytes from oral potentially malignant disorders (OPMD). Premalignant keratinocytes, therefore, not only become immortal but also develop genotypic and phenotypic cellular diversity. As a result of these changes, certain clonal cell populations likely gain the capacity to invade the underlying connective tissue. We review the clinical implications of these changes and highlight a new PCR-based assay to identify aneuploid cell in fluids such as saliva, a technique that is extremely sensitive and could facilitate the regular monitoring of OPMD without the need for surgical biopsies and may avoid potential biopsy sampling errors. We also draw attention to recent studies designed to eliminate aneuploid tumour cell populations that, potentially, is a new therapeutic approach to prevent malignant transformations in OPMD.
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Affiliation(s)
- Stephen S. Prime
- Centre for Immunology and Regenerative Medicine, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK
- Correspondence: (S.S.P.); (E.K.P.)
| | - Nicola Cirillo
- Melbourne Dental School, University of Melbourne, 720 Swanson Street, Melbourne, VIC 3053, Australia
| | - E. Kenneth Parkinson
- Centre for Immunology and Regenerative Medicine, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK
- Correspondence: (S.S.P.); (E.K.P.)
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3
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Niklander SE, Hunter KD. A Protocol to Produce Genetically Edited Primary Oral Keratinocytes Using the CRISPR-Cas9 System. Methods Mol Biol 2023; 2588:217-229. [PMID: 36418691 DOI: 10.1007/978-1-0716-2780-8_14] [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: 11/24/2022]
Abstract
The Nobel Prize awarded gene editing system, CRISPR-Cas9, is probably one of the greatest achievements of the last decades. CRISPR-Cas9 can introduce irreversible genomic changes in its target DNA by simple specifying a 20-nucleotide sequence within its RNA guide. Due to its simplicity, efficacy, and relative low cost in comparison with other genome editing systems, it has become the most common gene editing system used in research laboratories. Here we describe a step-by-step protocol to produce genetically edited primary oral keratinocytes using the CRISPR-Cas9 system.
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Affiliation(s)
- Sven E Niklander
- Unidad de Patología y Medicina Oral, Facultad de Odontologia, Universidad Andres Bello, Viña del Mar, Chile
| | - Keith D Hunter
- Unit of Oral and Maxillofacial Medicine and Pathology, School of Clinical Dentistry, University of Sheffield, Sheffield, UK. .,Oral Biology and Pathology, University of Pretoria, Pretoria, South Africa. .,Liverpool Head and Neck Centre, University of Liverpool, Liverpool, United Kingdom.
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4
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Parkinson EK, Prime SS. Oral Senescence: From Molecular Biology to Clinical Research. FRONTIERS IN DENTAL MEDICINE 2022. [DOI: 10.3389/fdmed.2022.822397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Cellular senescence is an irreversible cell cycle arrest occurring following multiple rounds of cell division (replicative senescence) or in response to cellular stresses such as ionizing radiation, signaling imbalances and oxidative damage (stress-induced premature senescence). Even very small numbers of senescent cells can be deleterious and there is evidence that senescent cells are instrumental in a number of oral pathologies including cancer, oral sub mucous fibrosis and the side effects of cancer therapy. In addition, senescent cells are present and possibly important in periodontal disease and other chronic inflammatory conditions of the oral cavity. However, senescence is a double-edged sword because although it operates as a suppressor of malignancy in pre-malignant epithelia, senescent cells in the neoplastic environment promote tumor growth and progression. Many of the effects of senescent cells are dependent on the secretion of an array of diverse therapeutically targetable proteins known as the senescence-associated secretory phenotype. However, as senescence may have beneficial roles in wound repair, preventing fibrosis and stem cell activation the clinical exploitation of senescent cells is not straightforward. Here, we discuss biological mechanisms of senescence and we review the current approaches to target senescent cells therapeutically, including senostatics and senolytics which are entering clinical trials.
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Molecular Mechanisms of Malignant Transformation of Oral Submucous Fibrosis by Different Betel Quid Constituents-Does Fibroblast Senescence Play a Role? Int J Mol Sci 2022; 23:ijms23031637. [PMID: 35163557 PMCID: PMC8836171 DOI: 10.3390/ijms23031637] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 02/01/2023] Open
Abstract
Betel quid (BQ) is a package of mixed constituents that is chewed by more than 600 million people worldwide, particularly in Asia. The formulation of BQ depends on a variety of factors but typically includes areca nut, betel leaf, and slaked lime and may or may not contain tobacco. BQ chewing is strongly associated with the development of potentially malignant and malignant diseases of the mouth such as oral submucous fibrosis (OSMF) and oral squamous cell carcinoma (OSCC), respectively. We have shown recently that the constituents of BQ vary geographically and that the capacity to induce disease reflects the distinct chemical composition of the BQ. In this review, we examined the diverse chemical constituents of BQ and their putative role in oral carcinogenesis. Four major areca alkaloids—arecoline, arecaidine, guvacoline and guvacine—together with the polyphenols, were identified as being potentially involved in oral carcinogenesis. Further, we propose that fibroblast senescence, which is induced by certain BQ components, may be a key driver of tumour progression in OSMF and OSCC. Our study emphasizes that the characterization of the detrimental or protective effects of specific BQ ingredients may facilitate the development of targeted BQ formulations to prevent and/or treat potentially malignant oral disorders and oral cancer in BQ users.
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Impact of Aging on the Ovarian Extracellular Matrix and Derived 3D Scaffolds. NANOMATERIALS 2022; 12:nano12030345. [PMID: 35159690 PMCID: PMC8839021 DOI: 10.3390/nano12030345] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/12/2022] [Accepted: 01/19/2022] [Indexed: 12/25/2022]
Abstract
Advances in medical care, improvements in sanitation, and rising living standards contribute to increased life expectancy. Although this reflects positive human development, it also poses new challenges. Among these, reproductive aging is gradually becoming a key health issue because the age of menopause has remained constant at ~50 years, leading women to live longer in suboptimal endocrine conditions. An adequate understanding of ovarian senescence mechanisms is essential to prevent age-related diseases and to promote wellbeing, health, and longevity in women. We here analyze the impact of aging on the ovarian extracellular matrix (ECM), and we demonstrate significant changes in its composition and organization with collagen, glycosaminoglycans, and laminins significantly incremented, and elastin, as well as fibronectin, decreased. This is accompanied by a dynamic response in gene expression levels of the main ECM- and protease-related genes, indicating a direct impact of aging on the transcription machinery. Furthermore, in order to study the mechanisms driving aging and identify possible strategies to counteract ovarian tissue degeneration, we here described the successful production of a 3D ECM-based biological scaffold that preserves the structural modifications taking place in vivo and that represents a powerful high predictive in vitro model for reproductive aging and its prevention.
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7
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The Balance between Differentiation and Terminal Differentiation Maintains Oral Epithelial Homeostasis. Cancers (Basel) 2021; 13:cancers13205123. [PMID: 34680271 PMCID: PMC8534139 DOI: 10.3390/cancers13205123] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 12/26/2022] Open
Abstract
Simple Summary Oral cancer affecting the oral cavity represents the most common cancer of the head and neck region. Oral cancer develops in a multistep process in which normal cells gradually accumulate genetic and epigenetic modifications to evolve into a malignant disease. Mortality for oral cancer patients is high and morbidity has a significant long-term impact on the health and wellbeing of affected individuals, typically resulting in facial disfigurement and a loss of the ability to speak, chew, taste, and swallow. The limited scope to which current treatments are able to control oral cancer underlines the need for novel therapeutic strategies. This review highlights the molecular differences between oral cell proliferation, differentiation and terminal differentiation, defines terminal differentiation as an important tumour suppressive mechanism and establishes a rationale for clinical investigation of differentiation-paired therapies that may improve outcomes in oral cancer. Abstract The oral epithelium is one of the fastest repairing and continuously renewing tissues. Stem cell activation within the basal layer of the oral epithelium fuels the rapid proliferation of multipotent progenitors. Stem cells first undergo asymmetric cell division that requires tightly controlled and orchestrated differentiation networks to maintain the pool of stem cells while producing progenitors fated for differentiation. Rapidly expanding progenitors subsequently commit to advanced differentiation programs towards terminal differentiation, a process that regulates the structural integrity and homeostasis of the oral epithelium. Therefore, the balance between differentiation and terminal differentiation of stem cells and their progeny ensures progenitors commitment to terminal differentiation and prevents epithelial transformation and oral squamous cell carcinoma (OSCC). A recent comprehensive molecular characterization of OSCC revealed that a disruption of terminal differentiation factors is indeed a common OSCC event and is superior to oncogenic activation. Here, we discuss the role of differentiation and terminal differentiation in maintaining oral epithelial homeostasis and define terminal differentiation as a critical tumour suppressive mechanism. We further highlight factors with crucial terminal differentiation functions and detail the underlying consequences of their loss. Switching on terminal differentiation in differentiated progenitors is likely to represent an extremely promising novel avenue that may improve therapeutic interventions against OSCC.
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8
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Chicken Feather Keratin Peptides for the Control of Keratinocyte Migration. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11156779] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
FAO estimates that in 2030 the poultry meat production could reach 120 million tons, which is a challenge in terms of waste management. Feathers are mainly composed of keratin, an important biomaterial. Using feathers as a source of keratin will minimize the waste generated, while contributing to supply an important material for several industries, such as pharmaceutical and biomedical. The peptides were extracted from the feathers by microbial degradation. In this study, we evaluated the peptides effect on keratinocyte metabolic activity and migration. The influence of these peptides on non-activated and activated macrophages was also assessed. It was demonstrated that depending on the keratin peptide fraction in contact with keratinocytes, it is possible to modulate the migration rate of the keratinocytes. Peptide fraction with low molecular weight increases migration, while peptides with a high range of molecular sizes decreases it. Some peptide fractions induce the secretion of TNF-α in non-activated macrophages and not on activated macrophages, demonstrating that these peptides should only be placed in contact with cells, in the context of an ongoing inflammatory process. This work is a step forward on the understanding of keratin peptides influence on keratinocytes and immune cells system cells, macrophages.
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9
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Niklander SE, Crane HL, Darda L, Lambert DW, Hunter KD. The role of icIL-1RA in keratinocyte senescence and development of the senescence-associated secretory phenotype. J Cell Sci 2021; 134:jcs.252080. [PMID: 33526711 DOI: 10.1242/jcs.252080] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 01/13/2021] [Indexed: 12/27/2022] Open
Abstract
There is compelling evidence that senescent cells, through the senescence-associated secretory phenotype (SASP), can promote malignant transformation and invasion. Interleukin-1 (IL-1) is a key mediator of this cytokine network, but the control of its activity in the senescence programme has not been elucidated. IL-1 signalling is regulated by IL-1RA, which has four variants. Here, we show that expression of intracellular IL-1RA type 1 (icIL-1RA1), which competitively inhibits binding of IL-1 to its receptor, is progressively lost during oral carcinogenesis ex vivo and that the pattern of expression is associated with keratinocyte replicative fate in vitro We demonstrate that icIL-1RA1 is an important regulator of the SASP in mortal cells, as CRISPR/Cas9-mediated icIL-1RA1 knockdown in normal and mortal dysplastic oral keratinocytes is followed by increased IL-6 and IL-8 secretion, and rapid senescence following release from RhoA-activated kinase inhibition. Thus, we suggest that downregulation of icIL-1RA1 in early stages of the carcinogenesis process can enable the development of a premature and deregulated SASP, creating a pro-inflammatory state in which cancer is more likely to arise.
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Affiliation(s)
- Sven E Niklander
- Unit of Oral and Maxillofacial Medicine, Pathology and Surgery, University of Sheffield, Sheffield S10 2TA, UK.,Departamento de Cirugia y Patologia Oral, Facultad de Odontologia, Universidad Andres Bello, 2520000 Viña del Mar, Chile
| | - Hannah L Crane
- Unit of Oral and Maxillofacial Medicine, Pathology and Surgery, University of Sheffield, Sheffield S10 2TA, UK
| | - Lav Darda
- Unit of Oral and Maxillofacial Medicine, Pathology and Surgery, University of Sheffield, Sheffield S10 2TA, UK
| | - Daniel W Lambert
- Unit of Oral and Maxillofacial Medicine, Pathology and Surgery, University of Sheffield, Sheffield S10 2TA, UK
| | - Keith D Hunter
- Unit of Oral and Maxillofacial Medicine, Pathology and Surgery, University of Sheffield, Sheffield S10 2TA, UK .,Oral Biology and Pathology, University of Pretoria, Pretoria, South Africa
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10
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Chang YC, Wang JD, Chang HY, Zhou P, Hahn RA, Gordon MK, Laskin JD, Gerecke DR. Expression of Laminin γ2 Proteolytic Fragments in Murine Skin Following Exposure to Sulfur Mustard. Anat Rec (Hoboken) 2020; 303:1642-1652. [PMID: 32421930 DOI: 10.1002/ar.24405] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 09/24/2019] [Accepted: 09/29/2019] [Indexed: 12/14/2022]
Abstract
Laminin-332 is a basement membrane protein composed of three genetically distinct polypeptide chains that actively promote both skin epidermal cell adhesion and migration. Proteolytic fragments of the laminin γ2 chain stimulate migration and scattering of keratinocytes and cancer cells. Sulfur mustard (SM) is a bifunctional alkylating agent that induces separation of basal keratinocytes from the dermal-epidermal junction and invokes a strong inflammatory response leading to delayed wound repair. In the present studies, the role of laminin γ2 in SM-induced skin injury and wound repair was investigated using the mouse ear vesicant model. We found that laminin γ2 chain mRNA was preferentially upregulated in mouse ear skin exposed to SM. In situ hybridization confirmed overexpression of laminin γ2 transcript. Western blot analysis showed increased protein expression of the full-length proform of laminin γ2 and smaller processed fragments of laminin γ2 in skin exposed to SM. Dual immunofluorescence labeling indicated that laminin γ2 fragments are prevalent in suprabasal keratinocytes behind the leading edge in areas of hyperplasia in injured skin. In addition, co-expression of laminin γ2 and the senescent marker, p16-INK4a was found to overlap with the hyperplastic migratory epithelial sheet. This observation is similar to hypermotile keratinocytes reported in invasive carcinoma cells. Overall, our studies indicate that laminin γ2 is preferentially expressed in skin post SM exposure and that protein expression appears to become progressively more fragmented. The laminin γ2 fragments may play a role in regulating SM-induced skin wound repair. Anat Rec, 2020. © 2020 American Association for Anatomy.
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Affiliation(s)
- Yoke-Chen Chang
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - James D Wang
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - Hui-Ying Chang
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - Peihong Zhou
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - Rita A Hahn
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - Marion K Gordon
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - Jeffrey D Laskin
- Environmental and Occupational Health, Rutgers University School of Public Health, Piscataway, New Jersey, USA
| | - Donald R Gerecke
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
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Rousselle P, Scoazec JY. Laminin 332 in cancer: When the extracellular matrix turns signals from cell anchorage to cell movement. Semin Cancer Biol 2020; 62:149-165. [PMID: 31639412 DOI: 10.1016/j.semcancer.2019.09.026] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 08/22/2019] [Accepted: 09/29/2019] [Indexed: 02/07/2023]
Abstract
Laminin 332 is crucial in the biology of epithelia. This large extracellular matrix protein consists of the heterotrimeric assembly of three subunits - α3, β3, and γ2 - and its multifunctionality relies on a number of extracellular proteolytic processing events. Laminin 332 is central to normal epithelium homeostasis by sustaining cell adhesion, polarity, proliferation, and differentiation. It also supports a major function in epithelial tissue formation, repair, and regeneration by buttressing cell migration and survival and basement membrane assembly. Interest in this protein increased after the discovery that its expression is perturbed in tumor cells, cancer-associated fibroblasts, and the tumor microenvironment. This review summarizes current knowledge regarding the established involvement of the laminin 332 γ2 chain in tumor invasiveness and discusses the role of its α3 and β3 subunits.
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Affiliation(s)
- Patricia Rousselle
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS - Université Lyon 1, Institut de Biologie et Chimie des Protéines, SFR BioSciences Gerland-Lyon Sud, 7 passage du Vercors, F-69367, France.
| | - Jean Yves Scoazec
- Gustave Roussy Cancer Campus, 114 rue Edouard Vaillant, 94805 Villejuif cedex, France; Université Paris Sud, Faculté de Médecine de Bicêtre, 94270 Le Kremlin Bicêtre, France
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12
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Boudra R, Ramsey MR. Understanding Transcriptional Networks Regulating Initiation of Cutaneous Wound Healing. THE YALE JOURNAL OF BIOLOGY AND MEDICINE 2020; 93:161-173. [PMID: 32226345 PMCID: PMC7087049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The epidermis has an essential function in creating a barrier against the external environment to retain proper fluid balance and block the entry of pathogens. When damage occurs to this barrier, the wound must quickly be sealed to avoid fluid loss, cleared of invading pathogens, and then keratinocytes must re-form an intact barrier. This requires complex integration of temporally and spatially distinct signals to execute orderly closure of the wound, and failure of this process can lead to chronic ulceration. Transcription factors serve as a key integration point for the myriad of information coming from the external environment, allowing for an orderly process of re-epithelialization. Importantly, transcription factors engage with and alter the chromatin structure around key target genes through association with different chromatin-modifying complexes. In this review, we will discuss the current understanding of how transcription is regulated during the initiation of re-epithelialization, and the exciting technological advances that will allow for a more refined mechanistic understanding of the re-epithelialization process.
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Affiliation(s)
- Rafik Boudra
- Brigham and Women’s Hospital Department of Dermatology, Boston, MA,Harvard Medical School, Boston, MA
| | - Matthew R. Ramsey
- Brigham and Women’s Hospital Department of Dermatology, Boston, MA,Harvard Medical School, Boston, MA,To whom all correspondence should be addressed: Matthew R. Ramsey, PhD, Brigham and Women’s Hospital, 77 Ave Louis Pasteur, HIM 668, Boston, MA 02115; Tel: (617) 525-5775, Fax: (617) 525-5571,
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13
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Levi N, Papismadov N, Solomonov I, Sagi I, Krizhanovsky V. The ECM path of senescence in aging: components and modifiers. FEBS J 2020; 287:2636-2646. [PMID: 32145148 DOI: 10.1111/febs.15282] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 12/25/2019] [Accepted: 03/04/2020] [Indexed: 11/29/2022]
Abstract
The extracellular matrix (ECM) is a key noncellular component in all organs and tissues. It is composed of a large number of proteins including collagens, glycoproteins (GP), and ECM-associated proteins, which show diversity of biochemical and biophysical functions. The ECM is dynamic both in normal physiology of tissues and under pathological conditions. One cellular phenomenon associated with changes in both ECM components expression and in ECM remodeling enzymes secretion is cellular senescence. It represents a stable state form of cell cycle arrest induced in proliferating cells by various forms of stress. Short-term induction of senescence is essential for tumor suppression and tissue repair. However, long-term presence of senescent cells in tissues may have a detrimental role in promoting tissue damage and aging. Up to date, there is insufficient knowledge about the interplay between the ECM and senescence cells. Since changes in the ECM occur in many physiological and pathological conditions in which senescent cells are present, a better understanding of ECM-senescence interactions is necessary. Here, we will review the functions of the different ECM components and will discuss the current knowledge about their regulation in senescent cells and their influence on the senescence state.
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Affiliation(s)
- Naama Levi
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Nurit Papismadov
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Inna Solomonov
- Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
| | - Irit Sagi
- Biological Regulation, Weizmann Institute of Science, Rehovot, Israel
| | - Valery Krizhanovsky
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
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Zhang C, Lee HJ, Shrivastava A, Wang R, McQuiston TJ, Challberg SS, Pollok BA, Wang T. Long-Term In Vitro Expansion of Epithelial Stem Cells Enabled by Pharmacological Inhibition of PAK1-ROCK-Myosin II and TGF-β Signaling. Cell Rep 2019; 25:598-610.e5. [PMID: 30332641 PMCID: PMC6284236 DOI: 10.1016/j.celrep.2018.09.072] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 06/01/2018] [Accepted: 09/21/2018] [Indexed: 01/22/2023] Open
Abstract
Despite substantial self-renewal capability in vivo, epithelial stem and progenitor cells located in various tissues expand for a few passages in vitro in feeder-free condition before they succumb to growth arrest. Here, we describe the EpiX method, which utilizes small molecules that inhibit PAK1-ROCK-Myosin II and TGF-β signaling to achieve over one trillion-fold expansion of human epithelial stem and progenitor cells from skin, airway, mammary, and prostate glands in the absence of feeder cells. Transcriptomic and epigenomic studies show that this condition helps epithelial cells to overcome stresses for continuous proliferation. EpiX-expanded basal epithelial cells differentiate into mature epithelial cells consistent with their tissue origins. Whole-genome sequencing reveals that the cells retain remarkable genome integrity after extensive in vitro expansion without acquiring tumorigenicity. EpiX technology provides a solution to exploit the potential of tissue-resident epithelial stem and progenitor cells for regenerative medicine.
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Affiliation(s)
- Chengkang Zhang
- Propagenix, 9605 Medical Center Drive, Suite 325, Rockville, MD 20850, USA.
| | - Hyung Joo Lee
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63108, USA; The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Anura Shrivastava
- Propagenix, 9605 Medical Center Drive, Suite 325, Rockville, MD 20850, USA
| | - Ruipeng Wang
- Propagenix, 9605 Medical Center Drive, Suite 325, Rockville, MD 20850, USA
| | - Travis J McQuiston
- Propagenix, 9605 Medical Center Drive, Suite 325, Rockville, MD 20850, USA
| | - Sharon S Challberg
- Propagenix, 9605 Medical Center Drive, Suite 325, Rockville, MD 20850, USA
| | - Brian A Pollok
- Propagenix, 9605 Medical Center Drive, Suite 325, Rockville, MD 20850, USA
| | - Ting Wang
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63108, USA; The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA.
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15
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Li H, Petersen S, Garcia Mariscal A, Brakebusch C. Negative Regulation of p53-Induced Senescence by N-WASP Is Crucial for DMBA/TPA-Induced Skin Tumor Formation. Cancer Res 2019; 79:2167-2181. [PMID: 30894371 DOI: 10.1158/0008-5472.can-18-1253] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 09/18/2018] [Accepted: 03/14/2019] [Indexed: 11/16/2022]
Abstract
Mice with a keratinocyte-restricted deletion of the actin polymerization-promoting molecule, N-WASP, display cyclic hair loss and skin inflammation. Here, we showed that these mice were also resistant to 7,12-dimethylbenz(a)anthracene (DMBA)/12-O-tetradecanoylphorbol-13-acetate (TPA)-induced skin tumor formation. This resistance correlated with decreased expression of the senescence regulator, DNMT1, and increased expression of the senescence marker, p16Ink4a, in N-WASP-deficient epidermis. Moreover, primary N-WASP-null keratinocytes displayed a premature senescence phenotype in vitro. Expression and activation of p53, a major inducer of senescence, was not significantly altered in N-WASP-null keratinocytes. However, impairment of p53 function effectively rescued the senescence phenotype, indicating that N-WASP was an inhibitor of p53-induced senescence. Mechanistically, N-WASP regulated senescence by preventing p53-dependent degradation of the H3K9 methyltransferases, G9a/GLP, and the DNA methyltransferase, DNMT1, which both control keratinocyte senescence. This pathway collaborated with other N-WASP-independent, senescence-promoting signaling downstream of p53 and allowed the fine tuning of p53-induced senescence by N-WASP. Collectively, these data reveal N-WASP as an inhibitor of p53-induced senescence, which might be of importance for skin tumor formation and cellular aging of keratinocytes. SIGNIFICANCE: These findings demonstrate that N-WASP regulates p53-dependent senescence in keratinocytes in vitro and in vivo.
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Affiliation(s)
- Hui Li
- University of Copenhagen, Biotech Research and Innovation Centre (BRIC), Copenhagen, Denmark
| | - Simon Petersen
- University of Copenhagen, Biotech Research and Innovation Centre (BRIC), Copenhagen, Denmark
| | - Alberto Garcia Mariscal
- University of Copenhagen, Biotech Research and Innovation Centre (BRIC), Copenhagen, Denmark
| | - Cord Brakebusch
- University of Copenhagen, Biotech Research and Innovation Centre (BRIC), Copenhagen, Denmark.
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16
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Yang LQ, Xiao X, Li CX, Wu WY, Shen XM, Zhou ZT, Fan Y, Shi LJ. Human papillomavirus genotypes and p16 expression in oral leukoplakia and squamous cell carcinoma. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2019; 12:1022-1028. [PMID: 31933914 PMCID: PMC6945145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 01/19/2019] [Indexed: 06/10/2023]
Abstract
Several studies have shown a broad variation in the prevalence of human papillomavirus (HPV) in oral leukoplakia (OLK) and oral squamous cell carcinoma (OSCC), whereas the relationship is less well-defined and specific HPV genotypes lack examination in OLK. In the present study, the role of HPV and surrogate p16 expression was investigated to explore the correlation and pathogenesis in OLK and OSCC. Polymerase chain reaction (PCR) and flow-through hybridization technology were utilized to detect HPV genotypes in oral exfoliated cells from 30 healthy volunteers, 103 OLK and 30 OSCC patients. Expression of p16 was assessed by immunohistochemistry (IHC) in biopsies from these OLK and OSCC, in addition to 15 normal oral mucosal tissues as the control group. The healthy controls showed 3.3% (1/30) HPV presence; In OLK and OSCC, the detection rate was 4.9% (5/103), 3.3% (1/30), respectively. No significant relationship between HPV and OLK or OSCC was observed when compared with the control group (P>0.05). All 6 HPV-positive OLK and OSCC cases had p16 overexpression. But the sensitivity of p16 IHC was poor, because 88.4% (38/43) of p16 over-expressed OLK were HPV negative. There was no statistical significance between HPV and the sex, age, site, alcohol consumption, or smoking. These findings suggested HPV had a low prevalence in OLK and OSCC. This suggests the detection of HPV genotypes by PCR in exfoliated cells combined with p16 IHC may be more accurate to represent HPV infection.
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Affiliation(s)
- Li-Qun Yang
- Department of Oral Mucosal Diseases, Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institution of Stomotology, National Clinical Research Center of StomatologyShanghai, China
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical UniversityNanjing, China
- Department of Oral Medicine, Affiliated Hospital of Stomatology, Nanjing Medical UniversityNanjing, China
| | - Xuan Xiao
- Department of Oral Medicine, Shanghai Stomatological Hospital, Fudan UniversityShanghai, China
| | - Chen-Xi Li
- Department of Oral Mucosal Diseases, Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institution of Stomotology, National Clinical Research Center of StomatologyShanghai, China
| | - Wen-Yan Wu
- Department of Oral Mucosal Diseases, Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institution of Stomotology, National Clinical Research Center of StomatologyShanghai, China
| | - Xue-Min Shen
- Department of Oral Mucosal Diseases, Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institution of Stomotology, National Clinical Research Center of StomatologyShanghai, China
| | - Zeng-Tong Zhou
- Department of Oral Mucosal Diseases, Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institution of Stomotology, National Clinical Research Center of StomatologyShanghai, China
| | - Yuan Fan
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical UniversityNanjing, China
- Department of Oral Medicine, Affiliated Hospital of Stomatology, Nanjing Medical UniversityNanjing, China
| | - Lin-Jun Shi
- Department of Oral Mucosal Diseases, Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institution of Stomotology, National Clinical Research Center of StomatologyShanghai, China
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17
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Danielsson K, Olah J, Zohori-Zangeneh R, Nylander E, Ebrahimi M. Increased expression of p16 in both oral and genital lichen planus. Med Oral Patol Oral Cir Bucal 2018; 23:e449-e453. [PMID: 29924765 PMCID: PMC6051687 DOI: 10.4317/medoral.22432] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 05/22/2018] [Indexed: 12/29/2022] Open
Abstract
Background Lichen Planus, LP, is an inflammatory disease of possible autoimmune origin affecting mainly oral and genital mucosa and skin. According to the WHO oral LP is considered a potentially malignant disorders. The p16 tumour suppressor protein can act as an inhibitor of cyclin dependent kinases 4 and 6 and thus down regulate cell cycle progression. Since the discovery of p16 several studies have evaluated its expression in various forms of human cancers. The aim of this study was to evaluate and compare the expression of p16 in oral and genital LP and corresponding healthy mucosa. Material and Methods A total of 76 cases of oral LP (OLP), 34 cases of genital LP (GLP), 12 cases of healthy oral and 9 cases of healthy genital mucosa were analysed by the use of immunohistochemistry. Results Data showed p16 to be highly expressed in both oral and genital LP, higher than in oral (p=0.000), and genital controls (p=0.002). Conclusions Results suggest that the over-expression of p16 seen in LP play a part in the histopathology of the disease. Key words:p16, inflammation, oral, genital, lichen planus, malignant risk.
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Affiliation(s)
- K Danielsson
- Department of Odontology, Umeå University, SE - 901 85 Umeå, Sweden,
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18
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Rousselle P, Montmasson M, Garnier C. Extracellular matrix contribution to skin wound re-epithelialization. Matrix Biol 2018; 75-76:12-26. [PMID: 29330022 DOI: 10.1016/j.matbio.2018.01.002] [Citation(s) in RCA: 156] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 12/04/2017] [Accepted: 01/01/2018] [Indexed: 12/11/2022]
Abstract
The ability of skin to act as a barrier is primarily determined by cells that maintain the continuity and integrity of skin and restore it after injury. Cutaneous wound healing in adult mammals is a complex multi-step process that involves overlapping stages of blood clot formation, inflammation, re-epithelialization, granulation tissue formation, neovascularization, and remodeling. Under favorable conditions, epidermal regeneration begins within hours after injury and takes several days until the epithelial surface is intact due to reorganization of the basement membrane. Regeneration relies on numerous signaling cues and on multiple cellular processes that take place both within the epidermis and in other participating tissues. A variety of modulators are involved, including growth factors, cytokines, matrix metalloproteinases, cellular receptors, and extracellular matrix components. Here we focus on the involvement of the extracellular matrix proteins that impact epidermal regeneration during wound healing.
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Affiliation(s)
- Patricia Rousselle
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS - Université Lyon 1, Institut de Biologie et Chimie des Protéines, SFR BioSciences Gerland-Lyon Sud, 7 passage du Vercors, F-69367, France.
| | - Marine Montmasson
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS - Université Lyon 1, Institut de Biologie et Chimie des Protéines, SFR BioSciences Gerland-Lyon Sud, 7 passage du Vercors, F-69367, France
| | - Cécile Garnier
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS - Université Lyon 1, Institut de Biologie et Chimie des Protéines, SFR BioSciences Gerland-Lyon Sud, 7 passage du Vercors, F-69367, France
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19
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Chang YC, Gordon MK, Gerecke DR. Expression of Laminin 332 in Vesicant Skin Injury and Wound Repair. CLINICAL DERMATOLOGY (WILMINGTON, DEL.) 2018; 2:115. [PMID: 30058002 PMCID: PMC6063082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Sulfur Mustard (SM) is a potent vesicant or blistering agent. It is a highly reactive bi-functional alkylating agent that cross links proteins, DNA, and other cellular components. Laminin 332 is a heterotrimer glycoprotein and a crucial skin component that attaches the epidermal basal keratinocytes to the dermis. SM wounds histologically appear similar to Epidermolysis Bullosa (EB), human genetic blistering diseases that involve genetic changes in laminin 332. The specific mechanism of action of SM exposure is unknown, but there are several key similarities between vesicant induced cutaneous injury and the Junctional form of EB (JEB) cutaneous injury: 1) Initial alkylation causes blistering similar to JEB; 2) Initial injury is followed by protease activation and prolonged inflammation similar to the chronic inflammation observed in EB; 3) The blister plane is at the level of the lamina lucida in the Basement Membrane Zone (BMZ) for both JEB and SM-induced injury. This suggests that injury induced by vesicants is not unique and probably involves malformation of laminin 332. Understanding the role of laminin 332 in SM induced blisters may provide perspectives for future molecular therapeutic countermeasures against SM exposure.
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Affiliation(s)
| | | | - Donald R Gerecke
- Correspondence: Donald R Gerecke, Department of Pharmacology and, Toxicology, Rutgers University, Ernest Mario School of Pharmacy, 170 Frelinghuysen Road, Piscataway, NJ 08854, Tel: 848-445-0123;
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20
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Marthandan S, Menzel U, Priebe S, Groth M, Guthke R, Platzer M, Hemmerich P, Kaether C, Diekmann S. Conserved genes and pathways in primary human fibroblast strains undergoing replicative and radiation induced senescence. Biol Res 2016; 49:34. [PMID: 27464526 PMCID: PMC4963952 DOI: 10.1186/s40659-016-0095-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 07/19/2016] [Indexed: 01/01/2023] Open
Abstract
Background Cellular senescence is induced either internally, for example by replication exhaustion and cell division, or externally, for example by irradiation. In both cases, cellular damages accumulate which, if not successfully repaired, can result in senescence induction. Recently, we determined the transcriptional changes combined with the transition into replicative senescence in primary human fibroblast strains. Here, by γ-irradiation we induced premature cellular senescence in the fibroblast cell strains (HFF and MRC-5) and determined the corresponding transcriptional changes by high-throughput RNA sequencing. Results Comparing the transcriptomes, we found a high degree of similarity in differential gene expression in replicative as well as in irradiation induced senescence for both cell strains suggesting, in each cell strain, a common cellular response to error accumulation. On the functional pathway level, “Cell cycle” was the only pathway commonly down-regulated in replicative and irradiation-induced senescence in both fibroblast strains, confirming the tight link between DNA repair and cell cycle regulation. However, “DNA repair” and “replication” pathways were down-regulated more strongly in fibroblasts undergoing replicative exhaustion. We also retrieved genes and pathways in each of the cell strains specific for irradiation induced senescence. Conclusion We found the pathways associated with “DNA repair” and “replication” less stringently regulated in irradiation induced compared to replicative senescence. The strong regulation of these pathways in replicative senescence highlights the importance of replication errors for its induction. Electronic supplementary material The online version of this article (doi:10.1186/s40659-016-0095-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shiva Marthandan
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany.
| | - Uwe Menzel
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - Steffen Priebe
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - Marco Groth
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Reinhard Guthke
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - Matthias Platzer
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Peter Hemmerich
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Christoph Kaether
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Stephan Diekmann
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
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21
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Huang L, Minematsu T, Kitamura A, Quinetti PC, Nakagami G, Mugita Y, Oe M, Noguchi H, Mori T, Sanada H. Topical Administration of Acylated Homoserine Lactone Improves Epithelialization of Cutaneous Wounds in Hyperglycaemic Rats. PLoS One 2016; 11:e0158647. [PMID: 27404587 PMCID: PMC4942101 DOI: 10.1371/journal.pone.0158647] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 06/20/2016] [Indexed: 01/13/2023] Open
Abstract
Clinicians often experience delayed epithelialization in diabetic patients, for which a high glucose condition is one of the causes. However, the mechanisms underlying delayed wound closure have not been fully elucidated, and effective treatments to enhance epithelialization in patients with hyperglycaemia have not been established. Here we propose a new reagent, acylated homoserine lactone (AHL), to improve the delayed epithelialization due to the disordered formation of a basement membrane of epidermis in hyperglycaemic rats. Acute hyperglycaemia was induced by streptozotocin injection in this experiment. Full thickness wounds were created on the flanks of hyperglycaemic or control rats. Histochemical and immunohistochemical analyses were performed to identify hyperglycaemia-specific abnormalities in epidermal regeneration by comparison between groups. We then examined the effects of AHL on delayed epithelialization in hyperglycaemic rats. Histological analysis showed the significantly shorter epithelializing tissue (P < 0.05), abnormal structure of basement membrane (fragmentation and immaturity), and hypo- and hyperproliferation of basal keratinocytes in hyperglycaemic rats. Treating the wound with AHL resulted in the decreased abnormalities of basement membrane, normal distribution of proliferating epidermal keratinocytes, and significantly promoted epithelialization (P < 0.05) in hyperglycemic rats, suggesting the improving effects of AHL on abnormal epithelialization due to hyperglycemia.
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Affiliation(s)
- Lijuan Huang
- Departments of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
| | - Takeo Minematsu
- Departments of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
- * E-mail: (HS); (T. Minematsu)
| | - Aya Kitamura
- Departments of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
| | - Paes C. Quinetti
- Departments of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
| | - Gojiro Nakagami
- Departments of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
| | - Yuko Mugita
- Departments of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
| | - Makoto Oe
- Department of Advanced Nursing Technology, Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
| | - Hiroshi Noguchi
- Department of Life Support Technology (Molten), Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
| | - Taketoshi Mori
- Department of Life Support Technology (Molten), Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
| | - Hiromi Sanada
- Departments of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Hongo, Tokyo, Japan
- * E-mail: (HS); (T. Minematsu)
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22
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23
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Korm S, Jeong HC, Kwon OS, Park JR, Cho H, Kim YM, Chin YW, Cha HJ. α-Mangostin induces G1 cell cycle arrest in HCT116 cells through p38MAPK-p16INK4a pathway. RSC Adv 2015. [DOI: 10.1039/c5ra00780a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
α-Mangostin (α-MG), one of the active substances inGarcinia mangostana, has been shown to exhibit anti-cancer effects in HCT116 colon cancer cells.
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Affiliation(s)
- Sovannarith Korm
- Department of Life Science
- College of Natural Science
- Sogang University
- Seoul
- Republic of Korea
| | - Ho-Chang Jeong
- Department of Life Science
- College of Natural Science
- Sogang University
- Seoul
- Republic of Korea
| | - Ok-Seon Kwon
- Department of Life Science
- College of Natural Science
- Sogang University
- Seoul
- Republic of Korea
| | - Jeong-Rak Park
- Department of Life Science
- College of Natural Science
- Sogang University
- Seoul
- Republic of Korea
| | - Hyeseong Cho
- Department of Biochemistry
- Ajou University School of Medicine
- Suwon
- Republic of Korea
| | - Young-Mi Kim
- College of Pharmacy and BK21PLUS R-FIND Team
- Dongguk University-Seoul
- Goyang
- Republic of Korea
| | - Young-Won Chin
- College of Pharmacy and BK21PLUS R-FIND Team
- Dongguk University-Seoul
- Goyang
- Republic of Korea
| | - Hyuk-Jin Cha
- Department of Life Science
- College of Natural Science
- Sogang University
- Seoul
- Republic of Korea
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24
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p16INK4 Expression is not associated with human papillomavirus in oral lichen planus. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 118:694-702. [DOI: 10.1016/j.oooo.2014.09.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 07/22/2014] [Accepted: 09/03/2014] [Indexed: 01/09/2023]
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25
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Investigation of Human Embryonic Stem Cell-Derived Keratinocytes as an In Vitro Research Model for Mechanical Stress Dynamic Response. Stem Cell Rev Rep 2014; 11:460-73. [DOI: 10.1007/s12015-014-9565-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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26
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Hopkinson SB, Hamill KJ, Wu Y, Eisenberg JL, Hiroyasu S, Jones JC. Focal Contact and Hemidesmosomal Proteins in Keratinocyte Migration and Wound Repair. Adv Wound Care (New Rochelle) 2014; 3:247-263. [PMID: 24669360 DOI: 10.1089/wound.2013.0489] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 09/03/2013] [Indexed: 12/12/2022] Open
Abstract
Significance: During wound healing of the skin, keratinocytes should move over while still adhering to their underlying matrix. Thus, mechanistic insights into the wound-healing process require an understanding of the forms and functions of keratinocyte matrix adhesions, specifically focal contacts and hemidesmosomes, and their components. Recent Advances: Although the structure and composition of focal contacts and hemidesmosomes are relatively well defined, the functions of their components are only now being delineated using mouse genetic models and knockdown approaches in cell culture systems. Remarkably, both focal contact and hemidesmosomal proteins appear involved in determining the speed and directional migration of epidermal cells by modulating several signal transduction pathways. Critical Issues: Although many publications are centered on focal contacts, their existence in tissues such as the skin is controversial. Nonetheless, focal contact proteins are central to mechanisms that regulate skin cell motility. Conversely, hemidesmosomes have been identified in intact skin but whether hemidesmosomal components play a positive regulatory function in keratinocyte motility remains debated in the field. Future Directions: Defective wound healing is a developing problem in the aged, hospitalized and diabetic populations. Hence, deriving new insights into the molecular roles of matrix adhesion proteins in wound healing is a prerequisite to the development of novel therapeutics to enhance tissue repair and regeneration.
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Affiliation(s)
- Susan B. Hopkinson
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Kevin J. Hamill
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Yvonne Wu
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Jessica L. Eisenberg
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Sho Hiroyasu
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
| | - Jonathan C.R. Jones
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois
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27
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Phosphorylated S6 as an immunohistochemical biomarker of vulvar intraepithelial neoplasia. Mod Pathol 2013; 26:1498-507. [PMID: 23765247 DOI: 10.1038/modpathol.2013.85] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 04/13/2013] [Accepted: 04/18/2013] [Indexed: 12/26/2022]
Abstract
As life expectancy lengthens, cases of non-viral-associated vulvar squamous cell carcinoma and its precursor lesion, so-called differentiated vulvar intraepithelial neoplasia (VIN), continue to increase in frequency. Differentiated VIN often is difficult to recognize and failure to detect it before invasion results in morbidity and mortality. Thus, identification of a reliable biomarker for this type of lesion would be of great clinical benefit. Our recent studies have identified activation (ser235/236 phosphorylation) of ribosomal protein S6 (p-S6) in basal epithelial cells as an event that precedes and accompanies laminin γ(2) overexpression in most preinvasive oral dysplasias. To test this as a potential biomarker of vulvar dysplasia, we immunostained seven differentiated VINs and nine papillomavirus-related 'classic' VINs, most of which were associated with carcinoma, for p-S6. All carcinomas, all differentiated VINs, and most classic VINs contained regions of p-S6 staining in the basal layer, whereas basal and parabasal cells of normal vulvar epithelium and hyperplastic and inflamed lesions lacking cellular atypia were p-S6 negative. Laminin γ(2) was expressed in a subset of VINs, always occurring within basal p-S6 positive regions, as we had found previously for oral dysplasias. Lichen sclerosus is considered a potential precursor of vulvar carcinoma. Two lichen sclerosus lesions of patients with a concurrent carcinoma and one of six lichen sclerosus lesions without atypia or known concurrent carcinoma were basal p-S6 positive. In summary, there is a distinct difference in p-S6 basal cell layer staining between benign and neoplastic vulvar squamous epithelium, with consistent staining of differentiated VIN and of some lichen sclerosus lesions. These results support further studies to assess the potential of p-S6 as a biomarker to identify vulvar lesions at risk of progressing to invasive cancer.
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Degen M, Barron P, Natarajan E, Widlund HR, Rheinwald JG. RSK activation of translation factor eIF4B drives abnormal increases of laminin γ2 and MYC protein during neoplastic progression to squamous cell carcinoma. PLoS One 2013; 8:e78979. [PMID: 24205356 PMCID: PMC3810258 DOI: 10.1371/journal.pone.0078979] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 09/26/2013] [Indexed: 12/17/2022] Open
Abstract
Overexpression of the basement membrane protein Laminin γ2 (Lamγ2) is a feature of many epidermal and oral dysplasias and all invasive squamous cell carcinomas (SCCs). This abnormality has potential value as an immunohistochemical biomarker of premalignancy but its mechanism has remained unknown. We recently reported that Lamγ2 overexpression in culture is the result of deregulated translation controls and depends on the MAPK-RSK signaling cascade. Here we identify eIF4B as the RSK downstream effector responsible for elevated Lamγ2 as well as MYC protein in neoplastic epithelial cells. Premalignant dysplastic keratinocytes, SCC cells, and keratinocytes expressing the E6 oncoprotein of human papillomavirus (HPV) type 16 displayed MAPK-RSK and mTOR-S6K1 activation and overexpressed Lamγ2 and MYC in culture. Immunohistochemical staining of oral dysplasias and SCCs for distinct, RSK- and S6K1-specific S6 phosphorylation events revealed that their respective upstream pathways become hyperactive at the same time during neoplastic progression. However, pharmacologic kinase inhibitor studies in culture revealed that Lamγ2 and MYC overexpression depends on MAPK-RSK activity, independent of PI3K-mTOR-S6K1. eIF4B knockdown reduced Lamγ2 and MYC protein expression, consistent with the known requirement for eIF4B to translate mRNAs with long, complex 5′ untranslated regions (5′-UTRs). Accordingly, expression of a luciferase reporter construct preceded by the Lamγ2 5′-UTR proved to be RSK-dependent and mTOR-independent. These results demonstrate that RSK activation of eIF4B is causally linked to elevated Lamγ2 and MYC protein levels during neoplastic progression to invasive SCC. These findings have potential clinical significance for identifying premalignant lesions and for developing targeted drugs to treat SCC.
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Affiliation(s)
- Martin Degen
- Department of Dermatology, Brigham and Women's Hospital and Harvard Skin Disease Research Center, Boston, Massachusetts, United States of America
| | - Patricia Barron
- Department of Dermatology, Brigham and Women's Hospital and Harvard Skin Disease Research Center, Boston, Massachusetts, United States of America
| | - Easwar Natarajan
- Section of Oral and Maxillofacial Pathology, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Hans R. Widlund
- Department of Dermatology, Brigham and Women's Hospital and Harvard Skin Disease Research Center, Boston, Massachusetts, United States of America
| | - James G. Rheinwald
- Department of Dermatology, Brigham and Women's Hospital and Harvard Skin Disease Research Center, Boston, Massachusetts, United States of America
- * E-mail:
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Abstract
p16(INK4a), located on chromosome 9p21.3, is lost among a cluster of neighboring tumor suppressor genes. Although it is classically known for its capacity to inhibit cyclin-dependent kinase (CDK) activity, p16(INK4a) is not just a one-trick pony. Long-term p16(INK4a) expression pushes cells to enter senescence, an irreversible cell-cycle arrest that precludes the growth of would-be cancer cells but also contributes to cellular aging. Importantly, loss of p16(INK4a) is one of the most frequent events in human tumors and allows precancerous lesions to bypass senescence. Therefore, precise regulation of p16(INK4a) is essential to tissue homeostasis, maintaining a coordinated balance between tumor suppression and aging. This review outlines the molecular pathways critical for proper p16(INK4a) regulation and emphasizes the indispensable functions of p16(INK4a) in cancer, aging, and human physiology that make this gene special.
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Affiliation(s)
- Kyle M LaPak
- Biomedical Research Tower, Rm 586, The Ohio State University, 460 W. 12th Avenue, Columbus, OH 43210.
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30
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Chilosi M, Carloni A, Rossi A, Poletti V. Premature lung aging and cellular senescence in the pathogenesis of idiopathic pulmonary fibrosis and COPD/emphysema. Transl Res 2013; 162:156-73. [PMID: 23831269 DOI: 10.1016/j.trsl.2013.06.004] [Citation(s) in RCA: 196] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 06/11/2013] [Indexed: 02/06/2023]
Abstract
Different anatomic and physiological changes occur in the lung of aging people that can affect pulmonary functions, and different pulmonary diseases, including deadly diseases such as chronic obstructive pulmonary disease (COPD)/emphysema and idiopathic pulmonary fibrosis (IPF), can be related to an acceleration of the aging process. The individual genetic background, as well as exposure to a variety of toxic substances (cigarette smoke in primis) can contribute significantly to accelerating pulmonary senescence. Premature aging can impair lung function by different ways: by interfering specifically with tissue repair mechanisms after damage, thus perturbing the correct crosstalk between mesenchymal and epithelial components; by inducing systemic and/or local alteration of the immune system, thus impairing the complex mechanisms of lung defense against infections; and by stimulating a local and/or systemic inflammatory condition (inflammaging). According to recently proposed pathogenic models in COPD and IPF, premature cellular senescence likely affects distinct progenitors cells (mesenchymal stem cells in COPD, alveolar epithelial precursors in IPF), leading to stem cell exhaustion. In this review, the large amount of data supporting this pathogenic view are discussed, with emphasis on the possible molecular and cellular mechanisms leading to the severe parenchymal remodeling that characterizes, in different ways, these deadly diseases.
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Affiliation(s)
- Marco Chilosi
- Department of Pathology, University of Verona, Verona, Italy.
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31
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Olczyk P, Komosińska-Vassev K, Winsz-Szczotka K, Koźma EM, Wisowski G, Stojko J, Klimek K, Olczyk K. Propolis modulates vitronectin, laminin, and heparan sulfate/heparin expression during experimental burn healing. J Zhejiang Univ Sci B 2013; 13:932-41. [PMID: 23125086 DOI: 10.1631/jzus.b1100310] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE This study was aimed at assessing the dynamics of vitronectin (VN), laminin (LN), and heparan sulfate/heparin (HS/HP) content changes during experimental burn healing. METHODS VN, LN, and HS/HP were isolated and purified from normal and injured skin of domestic pigs, on the 3rd, 5th, 10th, 15th, and 21st days following thermal damage. The wounds were treated with apitherapeutic agent (propolis), silver sulfadiazine (SSD), physiological salt solution, and propolis vehicle. VN and LN were quantified using an immunoenzymatic assay and HS/HP was estimated by densitometric analysis. RESULTS Propolis treatment stimulated significant increases in VN, LN, and HS/HP contents during the initial phase of study, followed by a reduction in the estimated extracellular matrix molecules. Similar patterns, although less extreme, were observed after treatment with SSD. CONCLUSIONS The beneficial effects of propolis on experimental wounds make it a potential apitherapeutic agent in topical burn management.
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Affiliation(s)
- Paweł Olczyk
- Department of Clinical Chemistry and Laboratory Diagnostics, Medical University of Silesia, 41-200 Sosnowiec, Poland.
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Wang X, Ghasri P, Amir M, Hwang B, Hou Y, Khilili M, Lin A, Keene D, Uitto J, Woodley DT, Chen M. Topical application of recombinant type VII collagen incorporates into the dermal-epidermal junction and promotes wound closure. Mol Ther 2013; 21:1335-44. [PMID: 23670575 PMCID: PMC3704128 DOI: 10.1038/mt.2013.87] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 04/11/2013] [Indexed: 11/08/2022] Open
Abstract
Patients with recessive dystrophic epidermolysis bullosa (RDEB) have incurable skin fragility, blistering, and skin wounds due to mutations in the gene that codes for type VII collagen (C7) that mediates dermal-epidermal adherence in human skin. In this study, we evaluated if topically applied human recombinant C7 (rC7) could restore C7 at the dermal-epidermal junction (DEJ) and enhance wound healing. We found that rC7 applied topically onto murine skin wounds stably incorporated into the newly formed DEJ of healed wounds and accelerated wound closure by increasing re-epithelialization. Topical rC7 decreased the expression of fibrogenic transforming growth factor-β2 (TGF-β2) and increased the expression of anti-fibrogenic TGF-β3. These were accompanied by the reduced expression of connective tissue growth factor, fewer α smooth muscle actin (α-SMA)-positive myofibroblasts, and less deposition of collagen in the healed neodermis, consistent with less scar formation. In addition, using a mouse model in which skin from C7 knock out mice was grafted onto immunodeficient mice, we showed that applying rC7 onto RDEB grafts with wounds restored C7 and anchoring fibrils (AFs) at the DEJ of the grafts and corrected the dermal-epidermal separation. The topical application of rC7 may be useful for treating patients with RDEB and patients who have chronic skin wounds.
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Affiliation(s)
- Xinyi Wang
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
| | - Pedram Ghasri
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
| | - Mahsa Amir
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
| | - Brian Hwang
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
| | - Yingpin Hou
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
| | - Michael Khilili
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
| | - Andrew Lin
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
| | - Douglas Keene
- Department of Molecular and Medical Genetics,
Shriners Hospital for Children, Portland, Oregon,
USA
| | - Jouni Uitto
- Department of Dermatology and Cutaneous
Biology, Jefferson Medical College, Philadelphia,
Pennsylvania, USA
| | - David T Woodley
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
| | - Mei Chen
- Department of Dermatology, University of
Southern California, Los Angeles, California,
USA
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Miller J, Dakic A, Chen R, Palechor-Ceron N, Dai Y, Kallakury B, Schlegel R, Liu X. HPV16 E7 protein and hTERT proteins defective for telomere maintenance cooperate to immortalize human keratinocytes. PLoS Pathog 2013; 9:e1003284. [PMID: 23592995 PMCID: PMC3617164 DOI: 10.1371/journal.ppat.1003284] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2012] [Accepted: 02/15/2013] [Indexed: 12/13/2022] Open
Abstract
Previous studies have shown that wild-type human telomerase reverse transcriptase (hTERT) protein can functionally replace the human papillomavirus type 16 (HPV-16) E6 protein, which cooperates with the viral E7 protein in the immortalization of primary keratinocytes. In the current study, we made the surprising finding that catalytically inactive hTERT (hTERT-D868A), elongation-defective hTERT (hTERT-HA), and telomere recruitment-defective hTERT (hTERT N+T) also cooperate with E7 in mediating bypass of the senescence blockade and effecting cell immortalization. This suggests that hTERT has activities independent of its telomere maintenance functions that mediate transit across this restriction point. Since hTERT has been shown to have a role in gene activation, we performed microarray studies and discovered that E6, hTERT and mutant hTERT proteins altered the expression of highly overlapping sets of cellular genes. Most important, the E6 and hTERT proteins induced mRNA and protein levels of Bmi1, the core subunit of the Polycomb Group (PcG) complex 1. We show further that Bmi1 substitutes for E6 or hTERT in cell immortalization. Finally, tissue array studies demonstrated that expression of Bmi1 increased with the severity of cervical dysplasia, suggesting a potential role in the progression of cervical cancer. Together, these data demonstrate that hTERT has extra-telomeric activities that facilitate cell immortalization and that its induction of Bmi1 is one potential mechanism for mediating this activity. The human papillomaviruses (HPVs) are critical elements in the etiology of cervical cancer, as well as several other human cancers. The E6 protein, in combination with the E7 protein of these viruses, immortalizes epithelial cells and increases the expression of the hTERT protein. In the current study we show that the enzymatic activity of hTERT is not required for cooperating in cell immortalization. We further demonstrate that hTERT proteins increase the expression of the Bmi1 protein, which is also capable of cooperating in cell immortalization. We anticipate that these findings will stimulate new studies of telomerase in HPV biology, cancer etiology, and stem cell reprogramming.
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Affiliation(s)
- Jonathan Miller
- Department of Pathology, Georgetown University Medical Center, Washington, D.C., United States of America
| | - Aleksandra Dakic
- Department of Pathology, Georgetown University Medical Center, Washington, D.C., United States of America
| | - Renxiang Chen
- Department of Pathology, Georgetown University Medical Center, Washington, D.C., United States of America
| | - Nancy Palechor-Ceron
- Department of Pathology, Georgetown University Medical Center, Washington, D.C., United States of America
| | - Yuhai Dai
- Department of Pathology, Georgetown University Medical Center, Washington, D.C., United States of America
| | - Bhaskar Kallakury
- Department of Pathology, Georgetown University Medical Center, Washington, D.C., United States of America
| | - Richard Schlegel
- Department of Pathology, Georgetown University Medical Center, Washington, D.C., United States of America
- * E-mail: (RS); (XL)
| | - Xuefeng Liu
- Department of Pathology, Georgetown University Medical Center, Washington, D.C., United States of America
- * E-mail: (RS); (XL)
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34
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Abstract
Laminin 332, composed of the α3, β3 and γ2 chains, is an epithelial-basement membrane specific laminin variant. Its main role in normal tissues is the maintenance of epithelial-mesenchymal cohesion in tissues exposed to external forces, including skin and stratified squamous mucosa. After being secreted and deposited in the extracellular matrix, laminin 332 undergoes physiological maturation processes consisting in the proteolytic processing of domains located within the α3 and the γ2 chains. These maturation events are essential for laminin 332 integration into the basement membrane where it plays an important function in the nucleation and maintenance of anchoring structures. Studies in normal and pathological situations have revealed that laminin 332 can trigger distinct cellular events depending on the level of its proteolytic cleavages. In this review, the biological and structural characteristics of laminin 332 domains are presented and we discuss whether they trigger specific functions.
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Affiliation(s)
- Patricia Rousselle
- SFR BioSciences Gerland-Lyon Sud, Institut de Biologie et Chimie des Protéines, UMR 5305, CNRS, Université Lyon 1, Lyon, France.
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35
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Capturing epidermal stemness for regenerative medicine. Semin Cell Dev Biol 2012; 23:937-44. [PMID: 23036530 DOI: 10.1016/j.semcdb.2012.09.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 09/25/2012] [Indexed: 12/17/2022]
Abstract
The skin is privileged because several skin-derived stem cells (epithelial stem cells from epidermis and its appendages, mesenchymal stem cells from dermis and subcutis, melanocyte stem cells) can be efficiently captured for therapeutic use. Main indications remain the permanent coverage of extensive third degree burns and healing of chronic cutaneous wounds, but recent advances in gene therapy technology open the door to the treatment of disabling inherited skin diseases with genetically corrected keratinocyte stem cells. Therapeutic skin stem cells that were initially cultured in research or hospital laboratories must be produced according strict regulatory guidelines, which ensure patients and medical teams that the medicinal cell products are safe, of constant quality and manufactured according to state-of-the art technology. Nonetheless, it does not warrant clinical efficacy and permanent engraftment of autologous stem cells remains variable. There are many challenges ahead to improve efficacy among which to keep telomere-dependent senescence and telomere-independent senescence (clonal conversion) to a minimum in cell culture and to understand the cellular and molecular mechanisms implicated in engraftment. Finally, medicinal stem cells are expansive to produce and reimbursement of costs by health insurances is a major concern in many countries.
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36
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Thomason HA, Cooper NH, Ansell DM, Chiu M, Merrit AJ, Hardman MJ, Garrod DR. Direct evidence that PKCα positively regulates wound re-epithelialization: correlation with changes in desmosomal adhesiveness. J Pathol 2012; 227:346-56. [PMID: 22407785 DOI: 10.1002/path.4016] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 02/03/2012] [Accepted: 02/24/2012] [Indexed: 12/17/2022]
Abstract
Non-healing wounds cause considerable patient morbidity and represent a significant economic burden. Central to wound repair is re-epithelialization, a crucial process involving the modulation of cell adhesion to allow keratinocyte migration to cover the exposed underlying tissues. The cellular mechanisms regulating the earliest stages of re-epithelialization are unclear. We present the first direct evidence that protein kinase Cα (PKCα) plays an important role in regulating wound re-epithelialization. In PKCα(-/-) mice re-epithelialization is delayed, while in novel bitransgenic mice over-expressing constitutively active PKCα it is accelerated. These effects are not due to changes in keratinocyte proliferation, apoptosis or intrinsic cell motility. Instead, they correlate with changes in desmosomal adhesiveness, delay being preceded by retained desmosomal hyper-adhesiveness and acceleration with a rapid switch to desmosomal Ca(2+) -dependence. We demonstrate mechanistic conservation in acute human wounds where PKCα localizes to wound edge desmosomes, which become Ca(2+) -dependent. However, in chronic wounds PKCα remains cytoplasmic and desmosomes fail to switch from the hyper-adhesive state. These results throw new mechanistic light on the earliest stages of wound re-epithelialization and suggest activation of PKCα as a new therapeutic strategy for non-healing wounds.
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37
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Degen M, Natarajan E, Barron P, Widlund HR, Rheinwald JG. MAPK/ERK-dependent translation factor hyperactivation and dysregulated laminin γ2 expression in oral dysplasia and squamous cell carcinoma. THE AMERICAN JOURNAL OF PATHOLOGY 2012; 180:2462-78. [PMID: 22546478 DOI: 10.1016/j.ajpath.2012.02.028] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 02/02/2012] [Accepted: 02/07/2012] [Indexed: 01/13/2023]
Abstract
Lesions displaying a variety of dysplastic changes precede invasive oral and epidermal squamous cell carcinoma (SCC); however, there are no histopathological criteria for either confirming or staging premalignancy. SCCs and dysplasias frequently contain cells that abnormally express the γ2 subunit of laminin-332. We developed cell culture models to investigate γ2 dysregulation. Normal human keratinocytes displayed density-dependent repression of γ2, whereas premalignant keratinocytes and SCC cells overexpressed γ2 and secreted laminin assembly intermediates. Neoplastic cells had hyperactive EGFR/MAPK(ERK) signaling coordinate with overexpressed γ2, and EGFR and MEK inhibitors normalized γ2 expression. Keratinocytes engineered to express HPV16 E6 or activated mutant HRAS, cRAF1, or MEK1 lost density repression of γ2 and shared with neoplastic cells signaling abnormalities downstream of ERK, including increased phosphorylation of S6 and eIF4 translation factors. Notably, qPCR results revealed that γ2 overexpression was not accompanied by increased γ2 mRNA levels, consistent with ERK-dependent, eIF4B-mediated translation initiation of the stem-looped, 5'-untranslated region of γ2 mRNA in neoplastic cells. Inhibitors of MEK, but not of TORC1/2, blocked S6 and eIF4B phosphorylation and γ2 overexpression. Immunostaining of oral dysplasias identified γ2 overexpression occurring within fields of basal cells that had elevated p-S6 levels. These results reveal a causal relationship between ERK-dependent translation factor activation and laminin γ2 dysregulation and identify new markers of preinvasive neoplastic change during progression to SCC.
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Affiliation(s)
- Martin Degen
- Department of Dermatology, Brigham and Women's Hospital and Harvard Skin Disease Research Center, Boston, MA, USA
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38
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TGFβ (transforming growth factor β) and keratocyte motility in 24 h zebrafish explant cultures. Cell Biol Int 2012; 35:1131-9. [PMID: 21729005 DOI: 10.1042/cbi20110063] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Fish keratocytes are used as a model system for the study of the mechanics of cell motility because of their characteristic rapid, smooth gliding motion, but little work has been done on the regulation of fish keratocyte movement. As TGFβ (transforming growth factor β) plays multiple roles in primary human keratinocyte cell migration, we investigated the possible involvement of TGFβ in fish keratocyte migration. Studying the involvement of TGFβ1 in 24 h keratocyte explant allows the examination of the cells before alterations in cellular physiology occur due to extended culture times. During this initial period, TGFβ levels increase 6.2-fold in SFM (serum-free medium) and 2.4-fold in SFM+2% FBS (fetal bovine serum), while TGFβ1 and TGFβRII (TGFβ receptor II) mRNA levels increase ∼3- and ∼5-fold respectively in each culture condition. Two measures of motility, cell sheet area and migration distance, vary with the amount of exogenous TGFβ1 and culture media. The addition of 100 ng/ml exogenous TGFβ1 in SFM increases both measures [3.3-fold (P = 4.5×10-5) and 26% (P = 2.1×10-2) respectively]. In contrast, 100 ng/ml of exogenous TGFβ1 in medium containing 2% FBS decreases migration distance by 2.1-fold (P = 1.7×10-7), but does not affect sheet area. TGFβ1 (10 ng/ml) has little effect on cell sheet area in SFM cultures, but leads to a 1.8-fold increase (P = 1.5×10-2) with 2% FBS. The variable response to TGFβ1 may be, at least in part, explained by the effect of 2% FBS on cell morphology, mode of motility and expression of endogenous TGFβ1 and TGFβRII. Together, these results suggest that expression of TGFβ and its receptor are up-regulated during zebrafish keratocyte explant culture and that TGFβ promotes fish keratocyte migration.
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Hamill KJ, Hopkinson SB, Hoover P, Todorović V, Green KJ, Jones JCR. Fibronectin expression determines skin cell motile behavior. J Invest Dermatol 2012; 132:448-57. [PMID: 21956124 PMCID: PMC3252482 DOI: 10.1038/jid.2011.297] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Mouse keratinocytes migrate significantly slower than their human counterparts in vitro on uncoated surfaces. We tested the hypothesis that this is a consequence of differences in the extracellular matrix (ECM) that cells deposit. In support of this, human keratinocyte motility was markedly reduced when plated onto the ECM of mouse skin cells, whereas the latter cells migrated faster when plated onto human keratinocyte ECM. The ECM of mouse and human keratinocytes contained similar levels of the α3 laminin subunit of laminin-332. However, mouse skin cells expressed significantly more fibronectin (FN) than human cells. To assess whether FN is a motility regulator, we used small interfering RNA (siRNA) to reduce the expression of FN in mouse keratinocytes. The treated mouse keratinocytes moved significantly more rapidly than wild-type mouse skin cells. Moreover, the FN-depleted mouse cell ECM supported increased migration of both mouse and human keratinocytes. Furthermore, the motility of human keratinocytes was slowed when plated onto FN-coated substrates or human keratinocyte ECM supplemented with FN in a dose-dependent manner. Consistent with these findings, the ECM of α3 integrin-null keratinocytes, which also migrated faster than wild-type cells, was FN deficient. Our results provide evidence that FN is a brake to skin cell migration supported by laminin-332-rich matrices.
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Affiliation(s)
- Kevin J Hamill
- Department of Cell and Molecular Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
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40
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Nishiyama T, Kii I, Kashima TG, Kikuchi Y, Ohazama A, Shimazaki M, Fukayama M, Kudo A. Delayed re-epithelialization in periostin-deficient mice during cutaneous wound healing. PLoS One 2011; 6:e18410. [PMID: 21490918 PMCID: PMC3072397 DOI: 10.1371/journal.pone.0018410] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Accepted: 03/04/2011] [Indexed: 11/24/2022] Open
Abstract
Background Matricellular proteins, including periostin, are important for tissue regeneration. Methods and Findings Presently we investigated the function of periostin in cutaneous wound healing by using periostin-deficient (−/−) mice. Periostin mRNA was expressed in both the epidermis and hair follicles, and periostin protein was located at the basement membrane in the hair follicles together with fibronectin and laminin γ2. Periostin was associated with laminin γ2, and this association enhanced the proteolytic cleavage of the laminin γ2 long form to produce its short form. To address the role of periostin in wound healing, we employed a wound healing model using WT and periostin−/− mice and the scratch wound assay in vitro. We found that the wound closure was delayed in the periostin−/− mice coupled with a delay in re-epithelialization and with reduced proliferation of keratinocytes. Furthermore, keratinocyte proliferation was enhanced in periostin-overexpressing HaCaT cells along with up-regulation of phosphorylated NF-κB. Conclusion These results indicate that periostin was essential for keratinocyte proliferation for re-epithelialization during cutaneous wound healing.
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Affiliation(s)
- Takashi Nishiyama
- Department of Biological Information, Tokyo Institute of Technology, Yokohama, Japan
| | - Isao Kii
- Department of Biological Information, Tokyo Institute of Technology, Yokohama, Japan
| | - Takeshi G. Kashima
- Department of Human Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshinao Kikuchi
- Department of Human Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Atsushi Ohazama
- Department of Pediodontology, Dental School, Showa University, Tokyo, Japan
| | - Masashi Shimazaki
- Department of Biological Information, Tokyo Institute of Technology, Yokohama, Japan
| | - Masashi Fukayama
- Department of Human Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Akira Kudo
- Department of Biological Information, Tokyo Institute of Technology, Yokohama, Japan
- * E-mail:
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41
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Senescence as a modulator of oral squamous cell carcinoma development. Oral Oncol 2010; 46:840-53. [DOI: 10.1016/j.oraloncology.2009.09.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Revised: 09/24/2009] [Accepted: 09/24/2009] [Indexed: 12/25/2022]
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42
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Wei W, Barron PD, Rheinwald JG. Modulation of TGF-β-inducible hypermotility by EGF and other factors in human prostate epithelial cells and keratinocytes. In Vitro Cell Dev Biol Anim 2010; 46:841-55. [PMID: 21042878 PMCID: PMC3568941 DOI: 10.1007/s11626-010-9353-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2010] [Accepted: 09/27/2010] [Indexed: 11/28/2022]
Abstract
Keratinocytes migrating from a wound edge or initiating malignant invasion greatly increase their expression of the basement membrane protein Laminin-322 (Lam332). In culture, keratinocytes initiate sustained directional hypermotility when plated onto an incompletely processed form of Lam332 (Lam332') or when treated with transforming growth factor beta (TGF-β), an inducer of Lam332 expression. The development and tissue architecture of stratified squamous and prostate epithelia are very different, yet the basal cells of both express p63, α6β4 integrin, and Lam332. Keratinocytes and prostate epithelial cells grow well in nutritionally optimized culture media with pituitary extract and certain mitogens. We report that prostate epithelial cells display hypermotility responses indistinguishable from those of keratinocytes. Several culture medium variables attenuated TGF-β-induced hypermotility, including Ca(++), serum, and some pituitary extract preparations, without impairing growth, TGF-β growth inhibition, or hypermotility on Lam322'. Distinct from its role as a mitogen, EGF proved to be a required cofactor for TGF-β-induced hypermotility and could not be replaced by HGF or KGF. Prostate epithelial cells have a short replicative lifespan, restricted both by p16(INK4A) and telomere-related mechanisms. We immortalized the normal prostate epithelial cell line HPrE-1 by transduction to express bmi1 and TERT. Prostate epithelial cells lose expression of p63, β4 integrin, and Lam332 when they transform to invasive carcinoma. In contrast, HPrE-1/bmi1/TERT cells retained expression of these proteins and normal TGF-β signaling and hypermotility for >100 doublings. Thus, keratinocytes and prostate epithelial cells possess common hypermotility and senescence mechanisms and immortalized prostate cell lines can be engineered using defined methods to yield cells retaining normal properties.
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Affiliation(s)
- Wei Wei
- Department of Dermatology and Harvard Skin Disease Research Center, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115
- Department of Pediatrics, Qilu Hospital of Shandong University, Jinan, Shandong, China, 250012
| | - Patricia D. Barron
- Department of Dermatology and Harvard Skin Disease Research Center, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115
| | - James G. Rheinwald
- Department of Dermatology and Harvard Skin Disease Research Center, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115
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Gao S, Nielsen BS, Krogdahl A, Sørensen JA, Tagesen J, Dabelsteen S, Dabelsteen E, Andreasen PA. Epigenetic alterations of the SERPINE1 gene in oral squamous cell carcinomas and normal oral mucosa. Genes Chromosomes Cancer 2010; 49:526-38. [PMID: 20222049 DOI: 10.1002/gcc.20762] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
A high level of plasminogen activator inhibitor-1 (PAI-1 or SERPINE1) in tumor extracts is a marker of a poor prognosis in human cancers, including oral carcinomas. However, the mechanisms responsible for the upregulation of PAI-1 in cancers remain unclear. Investigating specific PAI-1 expressing cells in oral carcinomas by immunohistochemistry, we found that PAI-1 was expressed in 18 of the 20 patients, mainly by cancer cells. Two showed PAI-1 positive stromal cells surrounding the tumor areas and five showed PAI-1 positive cells in tumor-adjacent normal epithelium. By real-time RT-PCR analysis, 17 of 20 patients with oral carcinoma were found to have between 2.5- and 50-fold increased tumor PAI-1 mRNA level, as compared with the matched tumor-adjacent normal tissues. The PAI-1 mRNA level in connective tissues from 15 healthy volunteers was similar to the level in tumor-adjacent normal tissues, but the level in epithelium was 5- to 10-fold lower. Analyzing DNA methylation of 25 CpG sites within 960 bp around the transcription initiation site of the SERPINE1 gene by bisulfite sequencing, we did the surprising observation that both tumors and tumor-adjacent normal tissue had a significant level of methylation, whereas there was very little methylation in tissue from healthy volunteers, suggesting that tumor-adjacent normal tissue already contains transformation-associated epigenetic changes. However, there was no general inverse correlation between PAI-1 mRNA levels and SERPINE1 gene methylation in all tissues, showing that CpG methylation is not the main determinant of the PAI-1 expression level in oral tissue.
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Affiliation(s)
- Shan Gao
- Department of Molecular Biology, Danish-Chinese Centre for Proteases and Cancer, University of Aarhus, 8000 Aarhus C, Denmark.
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Spontaneous skin damage and delayed wound healing in SOD1-deficient mice. Mol Cell Biochem 2010; 341:181-94. [DOI: 10.1007/s11010-010-0449-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Accepted: 03/18/2010] [Indexed: 11/26/2022]
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Dabelsteen S, Hercule P, Barron P, Rice M, Dorsainville G, Rheinwald JG. Epithelial cells derived from human embryonic stem cells display p16INK4A senescence, hypermotility, and differentiation properties shared by many P63+ somatic cell types. Stem Cells 2009; 27:1388-99. [PMID: 19489101 PMCID: PMC2733375 DOI: 10.1002/stem.64] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Human embryonic stem (hES) cells can generate cells expressing p63, K14, and involucrin, which have been proposed to be keratinocytes. Although these hES-derived, keratinocyte-like (hESderK) cells form epithelioid colonies when cultured in a fibroblast feeder system optimal for normal tissue-derived keratinocytes, they have a very short replicative lifespan unless engineered to express HPV16 E6E7. We report here that hESderK cells undergo senescence associated with p16(INK4A) expression, unrelated to telomere status. Transduction to express bmi1, a repressor of the p16(INK4A)/p14(ARF) locus, conferred upon hESderK cells and keratinocytes a substantially extended lifespan. When exposed to transforming growth factor beta or to an incompletely processed form of Laminin-332, three lifespan-extended or immortalized hESderK lines that we studied became directionally hypermotile, a wound healing and invasion response previously characterized in keratinocytes. In organotypic culture, hESderK cells stratified and expressed involucrin and K10, as do epidermal keratinocytes in vivo. However, their growth requirements were less stringent than keratinocytes. We then extended the comparison to endoderm-derived, p63(+)/K14(+) urothelial and tracheobronchial epithelial cells. Primary and immortalized lines of these cell types had growth requirements and hypermotility responses similar to keratinocytes and bmi1 expression facilitated their immortalization by engineering to express the catalytic subunit of telomerase (TERT). In organotypic culture, they stratified and exhibited squamous metaplasia, expressing involucrin and K10. Thus, hESderK cells proved to be distinct from all three normal p63(+) cell types tested. These results indicate that hESderK cells cannot be identified conclusively as keratinocytes or even as ectodermal cells, but may represent an incomplete form of, or deviation from, normal p63(+) lineage development.
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Affiliation(s)
- Sally Dabelsteen
- Department of Dermatology and Harvard Skin Disease Research Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
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Chang YC, Sabourin CLK, Lu SE, Sasaki T, Svoboda KKH, Gordon MK, Riley DJ, Casillas RP, Gerecke DR. Upregulation of gamma-2 laminin-332 in the mouse ear vesicant wound model. J Biochem Mol Toxicol 2009; 23:172-84. [PMID: 19526566 PMCID: PMC4465420 DOI: 10.1002/jbt.20275] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Epithelial cell migration during wound healing is regulated in part by enzymatic processing of laminin-332 (formerly LN-5), a heterodimer formed from alpha, beta, and gamma polypeptide chains. Under static conditions, laminin-332 is secreted into the extracellular matrix as a proform and has two chains processed to smaller forms, allowing it to anchor epithelial cells to the basement membrane of the dermis. During incisional wounding, laminin gamma2 chains in particular are processed to smaller sizes and function to promote epithelial sheet migration over the wound bed. The present study examines whether this same function occurs following chemical injury. The mouse ear vesicant model (MEVM) was used to follow the pathology in the ear and test whether processed laminin-332 enhances epithelial cell migration. Skin biopsies of sulfur mustard (SM) exposed ears for several time points were analyzed by histology, immunohistochemistry, real-time PCR, and Western blot analysis. SM exposure greatly increased mRNA levels for laminin-gamma2 in comparison to the other two chains. Protein production of laminin-gamma2 was upregulated, and there was an increase in the processed forms. Protein production was in excess of the amount required to form heterotrimeric laminin-332 and was associated with the migrating epithelial sheet, suggesting a potential role in wound healing for monomeric laminin-gamma2.
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Affiliation(s)
- Yoke-Chen Chang
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, EOHSI, 170 Frelinghuysen Road, Piscataway, NJ 08854, USA
| | | | - Shou-En Lu
- Department of Biostatistics, UMDNJ School of Public Health, 683 Hoes Lane West, Piscataway, NJ 08854, USA
| | - Takako Sasaki
- Department of Molecular Biology & Biochemistry, Oregon Health & Science University, Portland, OR 97239, USA
| | - Kathy K. H. Svoboda
- Biomedical Sciences, Texas A&M Health Science Center, Baylor College of Dentistry, Dallas, TX 75246, USA
| | - Marion K. Gordon
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, EOHSI, 170 Frelinghuysen Road, Piscataway, NJ 08854, USA
| | - David J. Riley
- Department of Medicine, UMDNJ–Robert Wood Johnson Medical School, 675 Hoes Lane West, Piscataway, NJ 08854, USA
| | - Robert P. Casillas
- Battelle Memorial Institute, 505 King Avenue, Columbus, OH 43201-2693, USA
| | - Donald R. Gerecke
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, EOHSI, 170 Frelinghuysen Road, Piscataway, NJ 08854, USA
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Schraml E, Fuchs R, Kotzbeck P, Grillari J, Schauenstein K. Acute adrenergic stress inhibits proliferation of murine hematopoietic progenitor cells via p38/MAPK signaling. Stem Cells Dev 2009; 18:215-27. [PMID: 18444787 DOI: 10.1089/scd.2008.0072] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Acute adrenergic stress is a cause of hematopoietic failure that accompanies severe injury. Although the communication between neuronal and immune system is well documented and catecholamines are known as important regulators of homeostasis, the molecular mechanisms of hematopoietic failure are not well understood. To study the influence of adrenergic stress on hematopoietic progenitor cells (HPCs), which recently have been found to express adrenergic receptors, Lin(-),Sca(+), cells were isolated and treated with alpha- and beta-adrenergic agonists in vitro. Indeed, this stimulation resulted in significantly decreased colony formation capacity using granulocyte/macrophage colony-forming unit assays. This decline was dependent on the formation of reactive oxygen species (ROS) and activation of the p38/mitogen-activated protein kinase (MAPK) pathway, since the addition of antioxidants or a p38 inhibitor restored CFU formation. DNA damage by adrenergically induced ROS, however, does not seem to account for the reduction of colonies. Thus, catecholamine/p38/MAPK is identified as a key signal transduction pathway in HPCs besides those dependent on Wnt, Notch, and sonic hedgehog. Furthermore, a well-known target of p38 signaling, p16 is transcriptionally activated after adrenergic stimulation, suggesting that cell cycle arrest might importantly contribute to hematopoietic failure and immune dysfunctions after severe injury. Since increased levels of catecholamines are also observed in other conditions, such as during aging which is linked with decline of immune functions, adrenergic stress might as well contribute to the lowered immune defence in the elderly.
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Affiliation(s)
- Elisabeth Schraml
- Institute of Pathophysiology and Immunology, Center of Molecular Medicine, Medical University of Graz, Graz, Austria.
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Gargiulo S, Gamba P, Sottero B, Biasi F, Chiarpotto E, Serviddio G, Vendemiale G, Poli G, Leonarduzzi G. The core-aldehyde 9-oxononanoyl cholesterol increases the level of transforming growth factor beta1-specific receptors on promonocytic U937 cell membranes. Aging Cell 2009; 8:77-87. [PMID: 19302374 DOI: 10.1111/j.1474-9726.2009.00454.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Among the broad variety of compounds generated via oxidative reactions in low-density lipoproteins (LDL) and subsequently found in the atherosclerotic plaque are aldehydes that are still esterified to the parent lipid, termed core aldehydes. The most represented cholesterol core aldehyde in LDL is 9-oxononanoyl cholesterol (9-ONC), an oxidation product of cholesteryl linoleate. 9-ONC, at a concentration detectable in biological material, markedly up-regulates mRNA expression and protein level of both the pro-fibrogenic and pro-apoptotic cytokine transforming growth factor beta1 (TGF-beta1) and the TGF-beta receptor type I (TbetaRI) in human U937 promonocytic cells. We also observed increased membrane presentation of TGF-beta receptor type II (TbetaRII). Experiments employing the TbetaRI inhibitor SB431542, or the TGFbeta antagonist DANFc chimera, have shown that the effect on TbetaRI is directly induced by 9-ONC, while TbetaRII up-regulation seems stimulated by its specific ligand, i.e. TGFbeta1, over-secreted meanwhile by treated cells. Increased levels of the cytokine and of its specific receptors in 9-ONC-treated cells clearly occurs through stimulation of extracellular signal-regulated kinase 1 and 2 (ERK1/2), as demonstrated by ERK1/2 knockdown experiments using mitogen-activated protein kinase/extracellular signal-regulated kinase 1 and 2 (MEK1 and MEK2) siRNAs, or PD98059, a selective MEK1/2 inhibitor. 9-ONC might thus sustain further vascular remodeling due to atherosclerosis, not simply by stimulating synthesis of the pro-fibrogenic cytokine TGF-beta1 in vascular cells, but also and chiefly by enhancing the TGF-beta1 autocrine loop, because of the marked up-regulation of the cytokine's specific receptors TbetaRI and TbetaRII.
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Affiliation(s)
- Simona Gargiulo
- Department of Clinical and Biological Sciences, University of Torino, Turin, Italy
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Mroz EA, Baird AH, Michaud WA, Rocco JW. COOH-Terminal Binding Protein Regulates Expression of the p16INK4A Tumor Suppressor and Senescence in Primary Human Cells. Cancer Res 2008; 68:6049-53. [DOI: 10.1158/0008-5472.can-08-1279] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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50
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Carlson ME, Hsu M, Conboy IM. Imbalance between pSmad3 and Notch induces CDK inhibitors in old muscle stem cells. Nature 2008; 454:528-32. [PMID: 18552838 DOI: 10.1038/nature07034] [Citation(s) in RCA: 352] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Accepted: 04/28/2008] [Indexed: 12/21/2022]
Abstract
Adult skeletal muscle robustly regenerates throughout an organism's life, but as the muscle ages, its ability to repair diminishes and eventually fails. Previous work suggests that the regenerative potential of muscle stem cells (satellite cells) is not triggered in the old muscle because of a decline in Notch activation, and that it can be rejuvenated by forced local activation of Notch. Here we report that, in addition to the loss of Notch activation, old muscle produces excessive transforming growth factor (TGF)-beta (but not myostatin), which induces unusually high levels of TGF-beta pSmad3 in resident satellite cells and interferes with their regenerative capacity. Importantly, endogenous Notch and pSmad3 antagonize each other in the control of satellite-cell proliferation, such that activation of Notch blocks the TGF-beta-dependent upregulation of the cyclin-dependent kinase (CDK) inhibitors p15, p16, p21 and p27, whereas inhibition of Notch induces them. Furthermore, in muscle stem cells, Notch activity determines the binding of pSmad3 to the promoters of these negative regulators of cell-cycle progression. Attenuation of TGF-beta/pSmad3 in old, injured muscle restores regeneration to satellite cells in vivo. Thus a balance between endogenous pSmad3 and active Notch controls the regenerative competence of muscle stem cells, and deregulation of this balance in the old muscle microniche interferes with regeneration.
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Affiliation(s)
- Morgan E Carlson
- Department of Bioengineering, University of California, Berkeley, California 94720, USA
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