1
|
Bchetnia M, Powell J, McCuaig C, Boucher-Lafleur AM, Morin C, Dupéré A, Laprise C. Pathological Mechanisms Involved in Epidermolysis Bullosa Simplex: Current Knowledge and Therapeutic Perspectives. Int J Mol Sci 2024; 25:9495. [PMID: 39273442 PMCID: PMC11394917 DOI: 10.3390/ijms25179495] [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: 07/15/2024] [Revised: 08/22/2024] [Accepted: 08/29/2024] [Indexed: 09/15/2024] Open
Abstract
Epidermolysis bullosa (EB) is a clinically and genetically heterogeneous group of mechanobullous diseases characterized by non-scarring blisters and erosions on the skin and mucous membranes upon mechanical trauma. The simplex form (EBS) is characterized by recurrent blister formation within the basal layer of the epidermis. It most often results from dominant mutations in the genes coding for keratin (K) 5 or 14 proteins (KRT5 and KRT14). A disruptive mutation in KRT5 or KRT14 will not only structurally impair the cytoskeleton, but it will also activate a cascade of biochemical mechanisms contributing to EBS. Skin lesions are painful and disfiguring and have a significant impact on life quality. Several gene expression studies were accomplished on mouse model and human keratinocytes to define the gene expression signature of EBS. Several key genes associated with EBS were identified as specific immunological mediators, keratins, and cell junction components. These data deepened the understanding of the EBS pathophysiology and revealed important functional biological processes, particularly inflammation. This review emphasizes the three EBS subtypes caused by dominant mutations on either KRT5 or KRT14 (localized, intermediate, and severe). It aims to summarize current knowledge about the EBS expression profiling pattern and predicted molecular mechanisms involved and to outline progress in therapy.
Collapse
Affiliation(s)
- Mbarka Bchetnia
- Département des Sciences Fondamentales, Université du Québec à Chicoutimi, Saguenay, QC G7H 2B1, Canada
- Centre Intersectoriel en Santé Durable, Saguenay, QC G7H 2B1, Canada
| | - Julie Powell
- CHU Sainte-Justine, Montreal, QC H3T 1C5, Canada
| | | | - Anne-Marie Boucher-Lafleur
- Département des Sciences Fondamentales, Université du Québec à Chicoutimi, Saguenay, QC G7H 2B1, Canada
- Centre Intersectoriel en Santé Durable, Saguenay, QC G7H 2B1, Canada
| | - Charles Morin
- Centre Intégré Universitaire de Santé et de Services Sociaux du Saguenay-Lac-Saint-Jean, Hôpital Universitaire de Chicoutimi, Saguenay, QC G7H 7K9, Canada
| | - Audrey Dupéré
- Centre Intégré Universitaire de Santé et de Services Sociaux du Saguenay-Lac-Saint-Jean, Hôpital Universitaire de Chicoutimi, Saguenay, QC G7H 7K9, Canada
| | - Catherine Laprise
- Département des Sciences Fondamentales, Université du Québec à Chicoutimi, Saguenay, QC G7H 2B1, Canada
- Centre Intersectoriel en Santé Durable, Saguenay, QC G7H 2B1, Canada
| |
Collapse
|
2
|
Rietmann SJ, Lange A, Soto S, Thom N, Manz E, Jagannathan V, Mayer U, Leeb T. KRT5 in-frame deletion in a family of German Shepherd dogs with split paw pad disease resembling localized epidermolysis bullosa simplex in human patients. Anim Genet 2024; 55:692-696. [PMID: 38742646 DOI: 10.1111/age.13444] [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: 04/05/2024] [Revised: 04/05/2024] [Accepted: 04/27/2024] [Indexed: 05/16/2024]
Abstract
Split paw pad disease is a scarcely defined phenotype characterized by skin lesions on the paw pads of dogs. We studied a family of German Shepherd dogs, in which four dogs developed intermittent paw pad lesions and lameness. The paw pads of two of the affected dogs were biopsied and demonstrated cleft formation in the stratum spinosum and stratum corneum, the outermost layers of the epidermis. Whole genome sequencing data from an affected dog revealed a private heterozygous 18 bp in frame deletion in the KRT5 gene. The deletion NM_001346035.1:c.988_1005del or NP_001332964.1:p.(Asn330_Asp335del) is predicted to lead to a loss of six amino acids in the L12 linker domain of the encoded keratin 5. KRT5 variants in human patients lead to various subtypes of epidermolysis bullosa simplex (EBS). Localized EBS is the mildest of the KRT5-related human diseases and may be caused by variants affecting the L12 linker domain of keratin 5. We therefore think that the detected KRT5 deletion in dogs represents a candidate causal variant for the observed skin lesions in dogs. However, while the clinical phenotype of KRT5-mutant dogs of this study closely resembles human patients with localized EBS, there are differences in the histopathology. EBS is defined by cleft formation within the basal layer of the epidermis while the cleft formation in the dogs described herein occurred in the outermost layers, a hallmark of split paw pad disease. Our study provides a basis for further studies into the exact relation of split paw pad disease and EBS.
Collapse
Affiliation(s)
- Stefan J Rietmann
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- DermFocus, University of Bern, Bern, Switzerland
| | - Anja Lange
- Anicura Kleintierspezialisten Augsburg GmbH, Augsburg, Germany
| | - Sara Soto
- DermFocus, University of Bern, Bern, Switzerland
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Nina Thom
- Small Animal Clinic, Justus-Liebig-University of Giessen, Giessen, Germany
| | | | - Vidhya Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Ursula Mayer
- Anicura Kleintierspezialisten Augsburg GmbH, Augsburg, Germany
| | - Tosso Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- DermFocus, University of Bern, Bern, Switzerland
| |
Collapse
|
3
|
Hu M, Li Z, Liu Y, Feng Y, Wang Z, Huang R, Li L, Huang X, Shao Q, Lin W, Cheng X, Yang Y. Multifunctional Hydrogel of Recombinant Humanized Collagen Loaded with MSCs and MnO 2 Accelerates Chronic Diabetic Wound Healing. ACS Biomater Sci Eng 2024; 10:3188-3202. [PMID: 38592024 DOI: 10.1021/acsbiomaterials.4c00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
Chronic wound repair is a clinical treatment challenge. The development of multifunctional hydrogels is of great significance in the key aspects of treating chronic wounds, including reducing oxidative stress, promoting angiogenesis, and improving the natural remodeling of extracellular matrix and immune regulation. In this study, we prepared a composite hydrogel, sodium alginate (SA)@MnO2/recombinant humanized collagen III (RHC)/mesenchymal stem cells (MSCs), composed of SA, MnO2 nanoparticles, RHC, and MSCs. The hydrogel has high mechanical properties and good biocompatibility. In vitro, SA@MnO2/RHC/MSCs hydrogel effectively enhanced the formation of intricate tubular structures and angiogenesis and showed synergistic effects on cell proliferation and migration. In vivo, the SA@MnO2/RHC/MSCs hydrogel enhanced diabetes wound healing, rapid re-epithelization, favorable collagen deposition, and abundant wound angiogenesis. These findings demonstrated that the combined effects of SA, MnO2, RHC, and MSCs synergistically accelerate healing, resulting in a reduced healing time. These observed healing effects demonstrated the potential of this multifunctional hydrogel to transform chronic wound care and improve patient outcomes.
Collapse
Affiliation(s)
- Meirong Hu
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Ziyi Li
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Yuan Liu
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Yuqing Feng
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Zhaoyang Wang
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Rufei Huang
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Lu Li
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Xiaopeng Huang
- Department of Molecular, Cell, and Developmental Biology, University of California Los Angeles, Los Angeles, California 90024, United States
| | - Qi Shao
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Wanqing Lin
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Xianxing Cheng
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
| | - Yan Yang
- Department of Cell Biology, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Bioengineering Medicine, Guangzhou 510632, China
| |
Collapse
|
4
|
Verbeeck J, Geroldinger M, Thiel K, Hooker AC, Ueckert S, Karlsson M, Bathke AC, Bauer JW, Molenberghs G, Zimmermann G. How to analyze continuous and discrete repeated measures in small-sample cross-over trials? Biometrics 2023; 79:3998-4011. [PMID: 37587671 DOI: 10.1111/biom.13920] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 07/26/2023] [Indexed: 08/18/2023]
Abstract
To optimize the use of data from a small number of subjects in rare disease trials, an at first sight advantageous design is the repeated measures cross-over design. However, it is unclear how these within-treatment period and within-subject clustered data are best analyzed in small-sample trials. In a real-data simulation study based upon a recent epidermolysis bullosa simplex trial using this design, we compare non-parametric marginal models, generalized pairwise comparison models, GEE-type models and parametric model averaging for both repeated binary and count data. The recommendation of which methodology to use in rare disease trials with a repeated measures cross-over design depends on the type of outcome and the number of time points the treatment has an effect on. The non-parametric marginal model testing the treatment-time-interaction effect is suitable for detecting between group differences in the shapes of the longitudinal profiles. For binary outcomes with the treatment effect on a single time point, the parametric model averaging method is recommended, while in the other cases the unmatched generalized pairwise comparison methodology is recommended. Both provide an easily interpretable effect size measure, and do not require exclusion of periods or subjects due to incompleteness.
Collapse
Affiliation(s)
- Johan Verbeeck
- Data Science Institute (DSI), Interuniversity Institute for Biostatistics and statistical Bioinformatics (I-BioStat), Hasselt University, Hasselt, Belgium
| | - Martin Geroldinger
- Team Biostatistics and Big Medical Data, Intelligent Data Analytics (IDA) Lab Salzburg, Paracelsus Medical University, Salzburg, Austria
- Research and Innovation Management, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Konstantin Thiel
- Team Biostatistics and Big Medical Data, Intelligent Data Analytics (IDA) Lab Salzburg, Paracelsus Medical University, Salzburg, Austria
- Research and Innovation Management, Paracelsus Medical University Salzburg, Salzburg, Austria
| | | | | | - Mats Karlsson
- Department of Pharmacy, Uppsala University, Uppsala, Sweden
| | - Arne Cornelius Bathke
- Intelligent Data Analytics (IDA) Lab Salzburg, Department of Artificial Intelligence and Human Interfaces, University of Salzburg, Salzburg, Austria
| | - Johann Wolfgang Bauer
- Department of Dermatology and Allergology, Paracelsus Medical University, Salzburg, Austria
| | - Geert Molenberghs
- Data Science Institute (DSI), Interuniversity Institute for Biostatistics and statistical Bioinformatics (I-BioStat), Hasselt University, Hasselt, Belgium
- Interuniversity Institute for Biostatistics and statistical Bioinformatics (I-BioStat), KULeuven, Leuven, Belgium
| | - Georg Zimmermann
- Team Biostatistics and Big Medical Data, Intelligent Data Analytics (IDA) Lab Salzburg, Paracelsus Medical University, Salzburg, Austria
- Research and Innovation Management, Paracelsus Medical University Salzburg, Salzburg, Austria
| |
Collapse
|
5
|
Verbeeck J, Dirani M, Bauer JW, Hilgers RD, Molenberghs G, Nabbout R. Composite endpoints, including patient reported outcomes, in rare diseases. Orphanet J Rare Dis 2023; 18:262. [PMID: 37658423 PMCID: PMC10474650 DOI: 10.1186/s13023-023-02819-x] [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: 03/07/2023] [Accepted: 07/08/2023] [Indexed: 09/03/2023] Open
Abstract
BACKGROUND When assessing the efficacy of a treatment in any clinical trial, it is recommended by the International Conference on Harmonisation to select a single meaningful endpoint. However, a single endpoint is often not sufficient to reflect the full clinical benefit of a treatment in multifaceted diseases, which is often the case in rare diseases. Therefore, the use of a combination of several clinically meaningful outcomes is preferred. Many methodologies that allow for combining outcomes in a so-called composite endpoint are however limited in a number of ways, not in the least in the number and type of outcomes that can be combined and in the poor small-sample properties. Moreover, patient reported outcomes, such as quality of life, often cannot be integrated in a composite analysis, in spite of their intrinsic value. RESULTS Recently, a class of non-parametric generalized pairwise comparisons tests have been proposed, which members do allow for any number and type of outcomes, including patient reported outcomes. The class enjoys good small-sample properties. Moreover, this very flexible class of methods allows for prioritizing the outcomes by clinical severity, allows for matched designs and for adding a threshold of clinical relevance. Our aim is to introduce the generalized pairwise comparison ideas and concepts for rare disease clinical trial analysis, and demonstrate their benefit in a post-hoc analysis of a small-sample trial in epidermolysis bullosa. More precisely, we will include a patient relevant outcome (Quality of life), in a composite endpoint. This publication is part of the European Joint Programme on Rare Diseases (EJP RD) series on innovative methodologies for rare diseases clinical trials, which is based on the webinars presented within the educational activity of EJP RD. This publication covers the webinar topic on composite endpoints in rare diseases and includes participants' response to a questionnaire on this topic. CONCLUSIONS Generalized pairwise comparisons is a promising statistical methodology for evaluating any type of composite endpoints in rare disease trials and may allow a better evaluation of therapy efficacy including patients reported outcomes in addition to outcomes related to the diseases signs and symptoms.
Collapse
Affiliation(s)
- Johan Verbeeck
- Data Science Institute, Hasselt University, Hasselt, Belgium.
| | - Maya Dirani
- reference centre for rare epilepsies Université Paris cité, Assistance Publique-Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Institut Imagine, Paris, France
| | - Johann W Bauer
- Department of Dermatology and Allergology, Paracelsus Medical University, Salzburg, Austria
| | - Ralf-Dieter Hilgers
- Department of Medical Statistics, MTZ - Medizintechnisches Zentrum, Aachen, Germany
| | - Geert Molenberghs
- Data Science Institute, Hasselt University, Hasselt, Belgium
- L-Biostat, KULeuven, Leuven, Belgium
| | - Rima Nabbout
- reference centre for rare epilepsies Université Paris cité, Assistance Publique-Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Institut Imagine, Paris, France
| |
Collapse
|
6
|
Rübsam M, Püllen R, Tellkamp F, Bianco A, Peskoller M, Bloch W, Green KJ, Merkel R, Hoffmann B, Wickström SA, Niessen CM. Polarity signaling balances epithelial contractility and mechanical resistance. Sci Rep 2023; 13:7743. [PMID: 37173371 PMCID: PMC10182030 DOI: 10.1038/s41598-023-33485-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 04/13/2023] [Indexed: 05/15/2023] Open
Abstract
Epithelia maintain a functional barrier during tissue turnover while facing varying mechanical stress. This maintenance requires both dynamic cell rearrangements driven by actomyosin-linked intercellular adherens junctions and ability to adapt to and resist extrinsic mechanical forces enabled by keratin filament-linked desmosomes. How these two systems crosstalk to coordinate cellular movement and mechanical resilience is not known. Here we show that in stratifying epithelia the polarity protein aPKCλ controls the reorganization from stress fibers to cortical actomyosin during differentiation and upward movement of cells. Without aPKC, stress fibers are retained resulting in increased contractile prestress. This aberrant stress is counterbalanced by reorganization and bundling of keratins, thereby increasing mechanical resilience. Inhibiting contractility in aPKCλ-/- cells restores normal cortical keratin networks but also normalizes resilience. Consistently, increasing contractile stress is sufficient to induce keratin bundling and enhance resilience, mimicking aPKC loss. In conclusion, our data indicate that keratins sense the contractile stress state of stratified epithelia and balance increased contractility by mounting a protective response to maintain tissue integrity.
Collapse
Affiliation(s)
- Matthias Rübsam
- Department Cell Biology of the Skin, University Hospital Cologne, University of Cologne, Cologne, Germany.
- Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.
- Center for Molecular Medicine Cologne (CMMC), University Hospital Cologne, University of Cologne, Cologne, Germany.
- Max Planck Institute for Biology of Ageing, 50931, Cologne, Germany.
| | - Robin Püllen
- Forschungszentrum Jülich, Institute of Biological Information Processing, IBI-2: Mechanobiology, 52428, Jülich, Germany
| | - Frederik Tellkamp
- Department Cell Biology of the Skin, University Hospital Cologne, University of Cologne, Cologne, Germany
- Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
- Institute for Genetics, University of Cologne, Cologne, Germany
| | - Alessandra Bianco
- Department Cell Biology of the Skin, University Hospital Cologne, University of Cologne, Cologne, Germany
- Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Marc Peskoller
- Department Cell Biology of the Skin, University Hospital Cologne, University of Cologne, Cologne, Germany
- Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University of Cologne, Cologne, Germany
| | - Kathleen J Green
- Departments of Pathology and Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Rudolf Merkel
- Forschungszentrum Jülich, Institute of Biological Information Processing, IBI-2: Mechanobiology, 52428, Jülich, Germany
| | - Bernd Hoffmann
- Forschungszentrum Jülich, Institute of Biological Information Processing, IBI-2: Mechanobiology, 52428, Jülich, Germany
| | - Sara A Wickström
- Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
- Max Planck Institute for Biology of Ageing, 50931, Cologne, Germany
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, 00290, Helsinki, Finland
| | - Carien M Niessen
- Department Cell Biology of the Skin, University Hospital Cologne, University of Cologne, Cologne, Germany.
- Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.
- Center for Molecular Medicine Cologne (CMMC), University Hospital Cologne, University of Cologne, Cologne, Germany.
| |
Collapse
|
7
|
Zhang X, Yu H, Wang N, Li C. Comprehensive analysis of long noncoding RNAs and lncRNA-mRNA networks in snakehead (Channa argus) response to Nocardia seriolae infection. FISH & SHELLFISH IMMUNOLOGY 2023; 133:108558. [PMID: 36690266 DOI: 10.1016/j.fsi.2023.108558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 06/17/2023]
Abstract
Evidence has been demonstrated that lncRNAs are involved in a variety of immune responses in vertebrate. It has been demonstrated that immune-related lncRNAs play vital functions in immune regulation against infections in teleost. Nocardia seriolae, as one of the Gram-positive bacteria, can cause chronic systemic granulomatous disease for snakehead (Channa argus). However, how lncRNAs function in the immune regulation process once snakehead was infected with N. seriolae infection has not been studied so far. Accordingly, transcription landscapes of lncRNAs and mRNAs in snakehead were investigated. A total of 1,991 lncRNA were obtained. Totally, we predicted 57,584 co-expression and 16,047 co-location lncRNA-mRNA pairs. To further analyze the potential function of these lncRNAs, GO enrichment analysis and KEGG signal pathways were performed on the target mRNAs of these differently expressed lncRNAs, suggesting that lncRNAs may play essential roles in modulating mRNA expression levels, and subsequently trigger downstream immune signaling pathways to regulate the immune response in snakehead. In addition, 9 DEmRNA and 3 lncRNAs were randomly selected for qRT-PCR analyzed, which confirmed the accuracy of transcriptome data. These results can provide novel knowledge about lncRNAs in immune responses process in snakehead, and can serve as important resources for further investigating the roles of lncRNAs during pathogen infections in teleost.
Collapse
Affiliation(s)
- Xiaoyan Zhang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Haohui Yu
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Ningning Wang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Chao Li
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China.
| |
Collapse
|
8
|
Rietscher K, Jahnke HG, Rübsam M, Lin EW, Has C, Omary MB, Niessen CM, Magin TM. Kinase Inhibition by PKC412 Prevents Epithelial Sheet Damage in Autosomal Dominant Epidermolysis Bullosa Simplex through Keratin and Cell Contact Stabilization. J Invest Dermatol 2022; 142:3282-3293. [PMID: 35691363 DOI: 10.1016/j.jid.2022.05.1088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 04/24/2022] [Accepted: 05/22/2022] [Indexed: 01/05/2023]
Abstract
Epidermolysis bullosa simplex (EBS) is a severe and potentially life-threatening disorder for which no adequate therapy exists. Most cases are caused by dominant sequence variations in keratin genes K5 or K14, leading to the formation of cytoplasmic keratin aggregates, profound keratinocyte fragility, and cytolysis. We hypothesized that pharmacological reduction of keratin aggregates, which compromise keratinocyte integrity, represents a viable strategy for the treatment of EBS. In this study, we show that the multikinase inhibitor PKC412, which is currently in clinical use for acute myeloid leukemia and advanced systemic mastocytosis, reduced keratin aggregation by 40% in patient-derived K14.R125C EBS-associated keratinocytes. Using a combination of epithelial shear stress assay and real-time impedance spectroscopy, we show that PKC412 restored intercellular adhesion. Molecularly, global phosphoproteomic analysis together with immunoblots using phosphoepitope-specific antibodies revealed that PKC412 treatment altered phosphorylated sites on keratins and desmoplakin. Thus, our data provide a proof of concept to repurpose existing drugs for the targeted treatment of EBS and showcase how one broad-range kinase inhibitor reduced keratin filament aggregation in patient-derived EBS keratinocytes and the fragility of EBS cell monolayers. Our study paves the way for a clinical trial using PKC412 for systemic or local application in patients with EBS.
Collapse
Affiliation(s)
- Katrin Rietscher
- Institute of Biology, Division of Cell and Developmental Biology, Leipzig University, Leipzig, Germany.
| | - Heinz-Georg Jahnke
- Division of Molecular Biological-Biochemical Processing Technology, Center for Biotechnology and Biomedicine, Leipzig University, Leipzig, Germany
| | - Matthias Rübsam
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany; Department Cell Biology of the Skin, Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Eric W Lin
- Division of Gastroenterology and Hepatology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Cristina Has
- Department of Dermatology, Medical Center, University of Freiburg, Freiburg, Germany
| | - M Bishr Omary
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, New Jersey, USA; Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey, USA
| | - Carien M Niessen
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany; Department Cell Biology of the Skin, Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Thomas M Magin
- Institute of Biology, Division of Cell and Developmental Biology, Leipzig University, Leipzig, Germany
| |
Collapse
|
9
|
Ivanenko AV, Evtushenko NA, Gurskaya NG. Genome Editing in Therapy of Genodermatoses. Mol Biol 2022. [DOI: 10.1134/s0026893322060085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
10
|
Dehghani S, Akbarzadeh Pasha B, Karimi A, Afshin A. Severe hyponatremia in an infant with epidermolysis bullosa: a case report. J Med Case Rep 2022; 16:358. [PMID: 36203176 PMCID: PMC9540733 DOI: 10.1186/s13256-022-03601-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 09/04/2022] [Indexed: 11/24/2022] Open
Abstract
Background Epidermolysis bullosa is a rare inherited connective tissue disorder compromising cellular junctions. Blister formation is the first manifestation of epidermolysis bullosa. As cellular adhesion is affected, it can affect many organs. Due to compromised skin integrity, water loss and electrolyte imbalances are prevalent in these patients. However, hypernatremia is the usual observed sodium imbalance rather than hyponatremia. Case presentation The patient was a 48-day-old Iranian male infant born near term. He was diagnosed with epidermolysis bullosa at 1 month of age. The patient was brought to the pediatrics center with apnea and respiratory distress, and was intubated and admitted to the pediatric intensive care unit. His symptoms started 4 days before the admission with vomiting and poor feeding, and the patient later developed loss of consciousness. Vital signs revealed a pulse rate of 154 beats per minute, respiratory rate of 70 per minute, a temporal temperature of 36.5 °C, nondetectable blood pressure, and oxygen saturation of 96%. The patient was anuric at presentation and was rehydrated. Physical examination showed bolus eruptions all over the body but not in mucosal membranes. Important laboratory findings were white blood cell count of 41,000/mm3 with 68% neutrophils, hemoglobin of 10.8 g/dL, platelet count of 856,000/mm2, negative C-reactive protein (CRP), blood sugar of 514 mg/dL, urea of 129 mg/dL, sodium of 98 mg/dL, corrected sodium of 105 mg/dL, potassium of 5.5 mg/dL, serum creatinine of 1.7 mg/dL, and serum procalcitonin of more than 75 ng/mL. Urine analysis revealed many red blood cells. Brain computed tomography demonstrated loss of differentiation between gray and white matter and effacement of cortical sulci suggesting severe cytotoxic edema. We administered 3% hypertonic saline and corrected the plasma sodium levels, and provided the patient with multiple doses of mannitol as well as antibiotics due to the leukocytosis. Subsequently, after 3 days in pediatric intensive care unit, the symptoms of brain edema resolved, and after 4 days, he was weaned from the ventilator and extubated. Later he was discharged from the pediatric intensive care unit. Conclusion This study illustrates the possibility of severe hyponatremia in patients with epidermolysis bullosa to clinicians. Although uncommon, knowledge on such possibilities is vital due to the possible detrimental outcomes for patients.
Collapse
Affiliation(s)
- Soheil Dehghani
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Prevention of Metabolic Disorders Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Amirali Karimi
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Azadeh Afshin
- Pediatric Nephrologist, Pediatric Chronic Kidney Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
11
|
So JY, Fulchand S, Wong CY, Li S, Nazaroff J, Gorell ES, de Souza MP, Murrell DF, Teng JM, Chiou AS, Tang JY. A global, cross-sectional survey of patient-reported outcomes, disease burden, and quality of life in epidermolysis bullosa simplex. Orphanet J Rare Dis 2022; 17:270. [PMID: 35841105 PMCID: PMC9287948 DOI: 10.1186/s13023-022-02433-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 06/30/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Epidermolysis bullosa simplex (EBS) comprises a group of rare, blistering genodermatoses. Prior work has been limited by small sample sizes, and much remains unexplored about the disease burden and health-related quality of life (QOL) of patients with EBS. The aim of this study was to characterize the most common patient-reported clinical manifestations and the health-related impact of QOL in EBS, and to examine differences in disease burden by age. METHODS Patients with a diagnosis of epidermolysis bullosa (EB) or their caregivers completed a one-time online survey administered by EBCare, an international online EB registry. Survey data from respondents self-reporting a diagnosis of EBS were analyzed for clinical and wound manifestations, medication use, and QOL (using Quality of Life in Epidermolysis Bullosa [QOLEB] scores). Differences across age groups were assessed using Kruskal-Wallis and Fisher's exact tests. RESULTS There were 214 survey respondents with EBS. The mean age was 32.8 years (standard deviation = 19.2). Many respondents reported blisters (93%), recurrent wounds (89%), pain (74%), chronic wounds (59%), itch (55%), and difficulty walking (44%). Mean QOLEB score was 14.7 (standard deviation = 7.5) indicating a "moderate" impact on QOL, and 12% of respondents required regular use of opiates. Findings were consistent in subgroup analyses restricted to respondents with diagnostic confirmation via genetic testing or skin biopsy (n = 63 of 214). Age-stratified analyses revealed differences in disease burden: younger respondents were more likely to self-report severe disease (24% vs. 19% vs. 5% for respondents aged 0-9 vs. 10-17 vs. 18 + , p = 0.001), failure to thrive (9% vs. 15% vs. 3%, p = 0.02), and use of gastrostomy tubes (15% vs. 12% vs. 1%, p < 0.001) and topical antibiotics (67% vs. 69% vs. 34%, p < 0.001), while older respondents were more likely to be overweight or obese (6% vs. 0% vs. 51%, p < 0.001) and have difficulty walking (24% vs. 46% vs. 48%, p = 0.04). CONCLUSIONS In the largest international cross-sectional survey of EBS patients conducted, respondents reported extensive disease burden including significant wounding, pain, itch, difficulty walking, and impact on QOL. Age stratified disease manifestations. These findings suggest significant unmet need, and treatment and counseling for EBS patients should consider age-specific differences.
Collapse
Affiliation(s)
- Jodi Y So
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - Shivali Fulchand
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - Christine Y Wong
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - Shufeng Li
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, USA
- Department of Urology, Stanford University School of Medicine, Stanford, CA, USA
| | - Jaron Nazaroff
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - Emily S Gorell
- Department of Dermatology, University of Cincinnati, College of Medicine, Cincinnati, OH, USA
| | | | - Dedee F Murrell
- Department of Dermatology, University of New South Wales, Sydney, NSW, Australia
| | - Joyce M Teng
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - Albert S Chiou
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - Jean Y Tang
- Department of Dermatology, Stanford University School of Medicine, Stanford, CA, USA.
| |
Collapse
|
12
|
Huang TL, Chou CC. Effect of mutations on the hydrophobic interactions of the hierarchical molecular structure and mechanical properties of epithelial keratin 1/10. Int J Biol Macromol 2022; 212:442-450. [PMID: 35623459 DOI: 10.1016/j.ijbiomac.2022.05.160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/18/2022] [Accepted: 05/23/2022] [Indexed: 11/05/2022]
Abstract
Human epithelial keratin is an intermediate filament protein that serves as a backbone to maintain the stability of the cell nucleus and mechanical stability of the whole cells. The present study focused on two point mutations, F231L and S233L, of the 1B domain of keratin K 1/10 related to the rare genetic skin disease palmoplantar keratoderma (PPK). We used molecular dynamics simulation to study the effects of the mutations on various hierarchical structures, including heterodimers, tetramers, and octamers of the K1/10 1B domain at the atomic scale. The initial results demonstrated that the wild type and mutant proteins were highly similar at the dimer level but had different microstructures and mechanics at a higher-level assembly. A decrease in the hydrophobic interactions and hydrogen bonds at the terminus resulted in weakened mechanical properties of the tetramer and octamer of the F231L mutant. The asymmetrical structure of the S233L tetramer with an uneven distribution of the hydrogen bonds decreased its mechanical properties. However, the S233L mutation provided extra hydrophobic interactions between these mutated amino acid residues in the octamer, leading to improved mechanical properties. The results of the present study provided a deeper understanding of how the differences in point mutations induced the changes in the configuration and mechanical properties at the molecular scale. The differences in these properties may influence keratin assembly at the microscopic scale and ultimately cause diseases at the macroscopic scale.
Collapse
Affiliation(s)
- Tzu-Lun Huang
- Institute of Applied Mechanics, National Taiwan University, Taipei City, Taiwan
| | - Chia-Ching Chou
- Institute of Applied Mechanics, National Taiwan University, Taipei City, Taiwan.
| |
Collapse
|
13
|
Evtushenko NA, Beilin AK, Kosykh AV, Vorotelyak EA, Gurskaya NG. Keratins as an Inflammation Trigger Point in Epidermolysis Bullosa Simplex. Int J Mol Sci 2021; 22:ijms222212446. [PMID: 34830328 PMCID: PMC8624175 DOI: 10.3390/ijms222212446] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 11/11/2021] [Accepted: 11/12/2021] [Indexed: 12/21/2022] Open
Abstract
Epidermolysis bullosa simplex (EBS) is a group of inherited keratinopathies that, in most cases, arise due to mutations in keratins and lead to intraepidermal ruptures. The cellular pathology of most EBS subtypes is associated with the fragility of the intermediate filament network, cytolysis of the basal layer of the epidermis, or attenuation of hemidesmosomal/desmosomal components. Mutations in keratins 5/14 or in other genes that encode associated proteins induce structural disarrangements of different strengths depending on their locations in the genes. Keratin aggregates display impaired dynamics of assembly and diminished solubility and appear to be the trigger for endoplasmic reticulum (ER) stress upon being phosphorylated by MAPKs. Global changes in cellular signaling mainly occur in cases of severe dominant EBS mutations. The spectrum of changes initiated by phosphorylation includes the inhibition of proteasome degradation, TNF-α signaling activation, deregulated proliferation, abnormal cell migration, and impaired adherence of keratinocytes. ER stress also leads to the release of proinflammatory danger-associated molecular pattern (DAMP) molecules, which enhance avalanche-like inflammation. Many instances of positive feedback in the course of cellular stress and the development of sterile inflammation led to systemic chronic inflammation in EBS. This highlights the role of keratin in the maintenance of epidermal and immune homeostasis.
Collapse
Affiliation(s)
- Nadezhda A. Evtushenko
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, 117997 Moscow, Russia; (N.A.E.); (A.K.B.); (A.V.K.)
| | - Arkadii K. Beilin
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, 117997 Moscow, Russia; (N.A.E.); (A.K.B.); (A.V.K.)
- Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova 26, 119334 Moscow, Russia;
| | - Anastasiya V. Kosykh
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, 117997 Moscow, Russia; (N.A.E.); (A.K.B.); (A.V.K.)
| | - Ekaterina A. Vorotelyak
- Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Vavilova 26, 119334 Moscow, Russia;
| | - Nadya G. Gurskaya
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, 117997 Moscow, Russia; (N.A.E.); (A.K.B.); (A.V.K.)
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Correspondence:
| |
Collapse
|
14
|
Paduano F, Colao E, Grillone T, Vismara MFM, Amato R, Nisticò S, Mignogna C, Dastoli S, Fabiani F, Zucco R, Trapasso F, Perrotti N, Iuliano R. A Familial Form of Epidermolysis Bullosa Simplex Associated with a Pathogenic Variant in KRT5. Genes (Basel) 2021; 12:genes12101503. [PMID: 34680898 PMCID: PMC8535670 DOI: 10.3390/genes12101503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/16/2021] [Accepted: 09/19/2021] [Indexed: 12/21/2022] Open
Abstract
Epidermolysis bullosa simplex is a disease that belongs to a group of genodermatoses characterised by the formation of superficial bullous lesions caused by minor mechanical trauma to the skin. The skin fragility observed in the EBS is mainly caused by pathogenic variants in the KRT5 and KRT14 genes that compromise the mechanical stability of epithelial cells. By performing DNA sequencing in a female patient with EBS, we found the pathogenic variant c.967G>A (p.Val323Met) in the KRT5 gene. This variant co-segregated with EBS in the family pedigree and was transmitted in an autosomal dominant inheritance manner. This is the first report showing a familial form of EBS due to this pathogenic variant.
Collapse
Affiliation(s)
- Francesco Paduano
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
- Department of Health Sciences, Campus S. Venuta, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; (S.N.); (C.M.); (S.D.); (R.Z.)
- Tecnologica Research Institute and Marrelli Health, Biomedical Section, Stem Cells and Medical Genetics Units, 88900 Crotone, Italy
- Correspondence: (F.P.); (R.I.)
| | - Emma Colao
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
| | - Teresa Grillone
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
| | - Marco Flavio Michele Vismara
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
| | - Rosario Amato
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
- Department of Health Sciences, Campus S. Venuta, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; (S.N.); (C.M.); (S.D.); (R.Z.)
| | - Steven Nisticò
- Department of Health Sciences, Campus S. Venuta, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; (S.N.); (C.M.); (S.D.); (R.Z.)
| | - Chiara Mignogna
- Department of Health Sciences, Campus S. Venuta, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; (S.N.); (C.M.); (S.D.); (R.Z.)
| | - Stefano Dastoli
- Department of Health Sciences, Campus S. Venuta, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; (S.N.); (C.M.); (S.D.); (R.Z.)
| | - Fernanda Fabiani
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
| | - Rossella Zucco
- Department of Health Sciences, Campus S. Venuta, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; (S.N.); (C.M.); (S.D.); (R.Z.)
| | - Francesco Trapasso
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
- Department of Experimental and Clinical Medicine, Campus S. Venuta, University Magna Graecia of Catanzaro, Viale Europa, 88100 Catanzaro, Italy
| | - Nicola Perrotti
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
- Department of Health Sciences, Campus S. Venuta, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; (S.N.); (C.M.); (S.D.); (R.Z.)
| | - Rodolfo Iuliano
- Medical Genetics Unit, Mater Domini University Hospital, 88100 Catanzaro, Italy; (E.C.); (T.G.); (M.F.M.V.); (R.A.); (F.F.); (F.T.); (N.P.)
- Department of Health Sciences, Campus S. Venuta, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy; (S.N.); (C.M.); (S.D.); (R.Z.)
- Correspondence: (F.P.); (R.I.)
| |
Collapse
|
15
|
Pan CY, Chou CC. Molecular origin of the effects of mutation on the structure and mechanical properties of human epithelial keratin K5/K14. J Mech Behav Biomed Mater 2021; 124:104798. [PMID: 34509171 DOI: 10.1016/j.jmbbm.2021.104798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/24/2021] [Accepted: 08/25/2021] [Indexed: 01/30/2023]
Abstract
Epithelial keratin, a type of intermediate filament (IF) protein, is one of the key components in maintaining the stability of the cell nucleus in the epidermis of the skin, the largest organ in the human body. It absorbs water and withstands external pressure, affecting the structural stability and mechanical properties of the skin. Epidermolysis bullosa simplex (EBS) is a rare genetic skin disease related to genetic mutations in epithelial keratin K5/K14. The resulting structural defects can cause keratinocytes in the basal layer to become fragile and rupture when subjected to mechanical stress. Its pathological feature is that the skin and mucous membranes are extremely fragile, and wounds and blisters occur under even slight external force. In this study, we focused on the amino acid sequence of the wild-type human keratin K5/K14 and sequences with point mutations, beginning with a full atomistic model of the K5/K14 heterodimer and proceeding to the higher hierarchical structure of the tetramer model. For the heterodimer, the structures of the wild type and the mutants share a high degree of similarity, and the helical structure is preserved. Then, based on the heterodimer model, we considered the keratin tetramer model with the ID1 contact from previous experimental observations. Our results suggested that in the wild-type tetramer, the hydrogen bonds formed in the middle and contact regions provide extra stability to tetramer 2B-2B interactions during IF assembly. The probabilities of hydrogen bond formation are lower in the mutant tetramers than in the wild-type tetramer in the contact region; the point mutations do not necessarily affect the structure for dimer formation, but changes in the interactions of amino acids may affect the higher-order assembly of IFs. We observed that the structures of the tetramers with point mutations were loosely stacked, and the mechanical properties were weaker than those of the wild-type tetramer. We further compared our results with the latest experimental measurements and discussed the relationship between the genotype of EBS disease and the atomic-level mutated structures. The atomistic model allowed us to study point mutations at the molecular level. The results can be further applied to reveal the effect of point mutations on EBS disease.
Collapse
Affiliation(s)
- Chien-Yu Pan
- Institute of Applied Mechanics, National Taiwan University, Taipei City, Taiwan
| | - Chia-Ching Chou
- Institute of Applied Mechanics, National Taiwan University, Taipei City, Taiwan.
| |
Collapse
|
16
|
Lekka M, Gnanachandran K, Kubiak A, Zieliński T, Zemła J. Traction force microscopy - Measuring the forces exerted by cells. Micron 2021; 150:103138. [PMID: 34416532 DOI: 10.1016/j.micron.2021.103138] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/15/2021] [Accepted: 08/09/2021] [Indexed: 12/23/2022]
Abstract
Cells generate mechanical forces (traction forces, TFs) while interacting with the extracellular matrix or neighbouring cells. Forces are generated by both cells and extracellular matrix (ECM) and transmitted within the cell-ECM or cell-cell contacts involving focal adhesions or adherens junctions. Within more than two decades, substantial progress has been achieved in techniques that measure TFs. One of the techniques is traction force microscopy (TFM). This review discusses the TFM and its advances in measuring TFs exerted by cells (single cells and multicellular systems) at cell-ECM and cell-cell junctional intracellular interfaces. The answers to how cells sense, adapt and respond to mechanical forces unravel their role in controlling and regulating cell behaviour in normal and pathological conditions.
Collapse
Affiliation(s)
- Małgorzata Lekka
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342, Cracow, Poland.
| | | | - Andrzej Kubiak
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342, Cracow, Poland
| | - Tomasz Zieliński
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342, Cracow, Poland
| | - Joanna Zemła
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342, Cracow, Poland
| |
Collapse
|
17
|
Abstract
The cytoskeleton - comprising actin filaments, microtubules and intermediate filaments - serves instructive roles in regulating cell function and behaviour during development. However, a key challenge in cell and developmental biology is to dissect how these different structures function and interact in vivo to build complex tissues, with the ultimate aim to understand these processes in a mammalian organism. The preimplantation mouse embryo has emerged as a primary model system for tackling this challenge. Not only does the mouse embryo share many morphological similarities with the human embryo during its initial stages of life, it also permits the combination of genetic manipulations with live-imaging approaches to study cytoskeletal dynamics directly within an intact embryonic system. These advantages have led to the discovery of novel cytoskeletal structures and mechanisms controlling lineage specification, cell-cell communication and the establishment of the first forms of tissue architecture during development. Here we highlight the diverse organization and functions of each of the three cytoskeletal filaments during the key events that shape the early mammalian embryo, and discuss how they work together to perform key developmental tasks, including cell fate specification and morphogenesis of the blastocyst. Collectively, these findings are unveiling a new picture of how cells in the early embryo dynamically remodel their cytoskeleton with unique spatial and temporal precision to drive developmental processes in the rapidly changing in vivo environment.
Collapse
|
18
|
Weber MS, Eibauer M, Sivagurunathan S, Magin TM, Goldman RD, Medalia O. Structural heterogeneity of cellular K5/K14 filaments as revealed by cryo-electron microscopy. eLife 2021; 10:70307. [PMID: 34323216 PMCID: PMC8360650 DOI: 10.7554/elife.70307] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/23/2021] [Indexed: 12/11/2022] Open
Abstract
Keratin intermediate filaments are an essential and major component of the cytoskeleton in epithelial cells. They form a stable yet dynamic filamentous network extending from the nucleus to the cell periphery, which provides resistance to mechanical stresses. Mutations in keratin genes are related to a variety of epithelial tissue diseases. Despite their importance, the molecular structure of keratin filaments remains largely unknown. In this study, we analyzed the structure of keratin 5/keratin 14 filaments within ghost mouse keratinocytes by cryo-electron microscopy and cryo-electron tomography. By averaging a large number of keratin segments, we have gained insights into the helical architecture of the filaments. Two-dimensional classification revealed profound variations in the diameter of keratin filaments and their subunit organization. Computational reconstitution of filaments of substantial length uncovered a high degree of internal heterogeneity along single filaments, which can contain regions of helical symmetry, regions with less symmetry and regions with significant diameter fluctuations. Cross-section views of filaments revealed that keratins form hollow cylinders consisting of multiple protofilaments, with an electron dense core located in the center of the filament. These findings shed light on the complex and remarkable heterogenic architecture of keratin filaments, suggesting that they are highly flexible, dynamic cytoskeletal structures.
Collapse
Affiliation(s)
- Miriam S Weber
- Department of Biochemistry, University of Zurich, Zurich, Switzerland
| | - Matthias Eibauer
- Department of Biochemistry, University of Zurich, Zurich, Switzerland
| | - Suganya Sivagurunathan
- Department of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, Chicago, United States
| | - Thomas M Magin
- Institute of Biology, University of Leipzig, Leipzig, Germany
| | - Robert D Goldman
- Department of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, Chicago, United States
| | - Ohad Medalia
- Department of Biochemistry, University of Zurich, Zurich, Switzerland
| |
Collapse
|
19
|
Ryumina II, Goryunov KV, Silachev DN, Shevtsova YA, Babenko VA, Marycheva NM, Kotalevskaya YY, Zubkov VV, Zubkov GT. Pathogenetic Therapy of Epidermolysis Bullosa: Current State and Prospects. Bull Exp Biol Med 2021; 171:109-121. [PMID: 34050833 DOI: 10.1007/s10517-021-05182-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Indexed: 11/27/2022]
Abstract
Epidermolysis bullosa is a severe hereditary disease caused by mutations in genes encoding cutaneous basement membrane proteins. These mutations lead to dermal-epidermal junction failure and, as a result, to disturbances in the morphological integrity of the skin. Clinically, it manifests in the formation of blisters on the skin or mucosa that in some cases can turn into non-healing chronic wounds, which not only impairs patient's quality of life, but also is a live-threatening condition. Now, the main approaches in the treatment of epidermolysis bullosa are symptomatic therapy and palliative care, though they are little effective and are aimed at reducing the pain, but not to complete recovery. In light of this, the development of new treatment approaches aimed at correction of genetic defects is in progress. Various methods based on genetic engineering technologies, transplantation of autologous skin cells, progenitor skin cells, as well as hematopoietic and mesenchymal stem cells are studied. This review analyzes the pathogenetic methods developed for epidermolysis bullosa treatment based on the latest achievements of molecular genetics and cellular technologies, and discusses the prospects for the use of these technologies for the therapy of epidermolysis bullosa.
Collapse
Affiliation(s)
- I I Ryumina
- V. I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russian Federation, Moscow, Russia
| | - K V Goryunov
- V. I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russian Federation, Moscow, Russia
| | - D N Silachev
- V. I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russian Federation, Moscow, Russia.
- A. N. Belozersky Research Institute of Physico-Chemical Biology, M. V. Lomonosov Moscow State University, Moscow, Russia.
| | - Yu A Shevtsova
- V. I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russian Federation, Moscow, Russia
| | - V A Babenko
- V. I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russian Federation, Moscow, Russia
- A. N. Belozersky Research Institute of Physico-Chemical Biology, M. V. Lomonosov Moscow State University, Moscow, Russia
| | - N M Marycheva
- V. I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russian Federation, Moscow, Russia
| | - Yu Yu Kotalevskaya
- M. F. Vladimirskiy Moscow Regional Research Clinical Institute, Moscow, Russia
| | - V V Zubkov
- V. I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russian Federation, Moscow, Russia
| | - G T Zubkov
- V. I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russian Federation, Moscow, Russia
| |
Collapse
|
20
|
Ferrara F, Pambianchi E, Woodby B, Messano N, Therrien JP, Pecorelli A, Canella R, Valacchi G. Evaluating the effect of ozone in UV induced skin damage. Toxicol Lett 2020; 338:40-50. [PMID: 33279629 DOI: 10.1016/j.toxlet.2020.11.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/24/2020] [Accepted: 11/29/2020] [Indexed: 12/12/2022]
Abstract
Air pollution represents one of the main risks for both environment and human health. The rapid urbanization has been leading to a continuous release of harmful manmade substances into the atmosphere which are associated to the exacerbation of several pathologies. The skin is the main barrier of our body against the external environment and it is the main target for the outdoor stressors. Among the pollutants, Ozone (O3) is one of the most toxic, able to initiate oxidative reactions and activate inflammatory response, leading to the onset of several skin conditions. Moreover, skin is daily subjected to the activity of Ultraviolet Radiation which are well known to induce harmful cutaneous effects including skin aging and sunburn. Even though both UV and O3 are able to affect the skin homeostasis, very few studies have investigated their possible additive effect. Therefore, in this study we evaluated the effect of the combined exposure of O3 and UV in inducing skin damage, by exposing human skin explants to UV alone or in combination with O3 for 4-days. Markers related to inflammation, redox homeostasis and tissue structure were analyzed. Our results demonstrated that O3 is able to amplify the UV induced skin oxinflammation markers.
Collapse
Affiliation(s)
- Francesca Ferrara
- Plants for Human Health Institute Animal Science Dept., NC Research Campus Kannapolis, NC, 28081, United States; Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Erika Pambianchi
- Plants for Human Health Institute Animal Science Dept., NC Research Campus Kannapolis, NC, 28081, United States
| | - Brittany Woodby
- Plants for Human Health Institute Animal Science Dept., NC Research Campus Kannapolis, NC, 28081, United States
| | - Nicolo' Messano
- Plants for Human Health Institute Animal Science Dept., NC Research Campus Kannapolis, NC, 28081, United States
| | | | - Alessandra Pecorelli
- Plants for Human Health Institute Animal Science Dept., NC Research Campus Kannapolis, NC, 28081, United States
| | - Rita Canella
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Giuseppe Valacchi
- Plants for Human Health Institute Animal Science Dept., NC Research Campus Kannapolis, NC, 28081, United States; Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy; Kyung Hee University, Department of Food and Nutrition, South Korea.
| |
Collapse
|
21
|
Abstract
Epidermolysis bullosa (EB) is an inherited, heterogeneous group of rare genetic dermatoses characterized by mucocutaneous fragility and blister formation, inducible by often minimal trauma. A broad phenotypic spectrum has been described, with potentially severe extracutaneous manifestations, morbidity and mortality. Over 30 subtypes are recognized, grouped into four major categories, based predominantly on the plane of cleavage within the skin and reflecting the underlying molecular abnormality: EB simplex, junctional EB, dystrophic EB and Kindler EB. The study of EB has led to seminal advances in our understanding of cutaneous biology. To date, pathogenetic mutations in 16 distinct genes have been implicated in EB, encoding proteins influencing cellular integrity and adhesion. Precise diagnosis is reliant on correlating clinical, electron microscopic and immunohistological features with mutational analyses. In the absence of curative treatment, multidisciplinary care is targeted towards minimizing the risk of blister formation, wound care, symptom relief and specific complications, the most feared of which - and also the leading cause of mortality - is squamous cell carcinoma. Preclinical advances in cell-based, protein replacement and gene therapies are paving the way for clinical successes with gene correction, raising hopes amongst patients and clinicians worldwide.
Collapse
|
22
|
Debele TA, Su WP. Polysaccharide and protein-based functional wound dressing materials and applications. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1809403] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Tilahun Ayane Debele
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, No. 138, Sheng Li Road, Tainan 704, Taiwan
- Department of Medical Biochemistry, College of Medicine and Health Science, University of Gondar, Gondar, Ethiopia
| | - Wen-Pin Su
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, No. 138, Sheng Li Road, Tainan 704, Taiwan
- Departments of Oncology and Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan
| |
Collapse
|
23
|
Bchetnia M, Allard JP, Boucher-Lafleur AM, Cruz Marino T, Dupéré A, Powell J, McCuaig C, Bernier MÈ, Laprise C. Severe epidermolysis bullosa simplex phenotype caused by codominant mutations p.Ile377Thr in keratin 14 and p.Gly138Glu in keratin 5. Exp Dermatol 2020; 29:961-969. [PMID: 32885477 DOI: 10.1111/exd.14189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 07/28/2020] [Accepted: 08/24/2020] [Indexed: 12/22/2022]
Abstract
Epidermolysis bullosa simplex (EBS) is a rare skin disease usually inherited in an autosomal dominant pattern. EBS is resulting from mutations in keratin 5 (KRT5) and keratin 14 (KRT14) genes encoding the keratins 5 and 14 proteins expressed in the keratinocytes of the basal layer of the epidermis. To date, seven pathogenic mutations have been reported to be responsible for EBS in the Canadian population from the province of Quebec: p.Pro25Leu, p.Leu150Pro, p.Met327Thr and p.Arg559X in KRT5; p.Arg125Ser, p.Ile377Thr and p.Ile412Phe in KRT14. Here, we present a novel French-Canadian patient diagnosed with EBS confined to the soles but presenting a severe complication form including blisters, hyperkeratosis, skin erosions and toenail abnormalities. Mutation screening was performed by direct sequencing of the entire coding regions of KRT5 and KRT14 genes and revealed the previously reported missense heterozygous mutation c. 1130T > C in KRT14 (p.Ile377Thr). Furthermore, this patient is carrying a second mutation in KRT5, c.413G > A (p.Gly138Glu), which has been linked to an increased risk of basal cell carcinoma in the literature. We suspect an impact of the p.Gly138Glu variant on the EBS phenotype severity of the studied patient. The pathogenicity and consequences of both genetic variations were simulated by in silico tools.
Collapse
Affiliation(s)
- Mbarka Bchetnia
- Centre intersectoriel en santé durable, Département des sciences fondamentales, Université du Québec à Chicoutimi (UQAC), Saguenay, QC, Canada
| | - Jean-Pascal Allard
- Centre intégré universitaire de santé et de services sociaux du Saguenay-Lac-Saint-Jean, Saguenay, QC, Canada
| | - Anne-Marie Boucher-Lafleur
- Centre intersectoriel en santé durable, Département des sciences fondamentales, Université du Québec à Chicoutimi (UQAC), Saguenay, QC, Canada
| | - Tania Cruz Marino
- Centre intégré universitaire de santé et de services sociaux du Saguenay-Lac-Saint-Jean, Saguenay, QC, Canada
| | - Audrey Dupéré
- Centre intégré universitaire de santé et de services sociaux du Saguenay-Lac-Saint-Jean, Saguenay, QC, Canada
| | - Julie Powell
- Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, Montréal, QC, Canada
| | - Catherine McCuaig
- Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, Montréal, QC, Canada
| | - Marie-Ève Bernier
- Centre intégré universitaire de santé et de services sociaux du Saguenay-Lac-Saint-Jean, Saguenay, QC, Canada
| | - Catherine Laprise
- Centre intersectoriel en santé durable, Département des sciences fondamentales, Université du Québec à Chicoutimi (UQAC), Saguenay, QC, Canada.,Centre intégré universitaire de santé et de services sociaux du Saguenay-Lac-Saint-Jean, Saguenay, QC, Canada
| |
Collapse
|
24
|
Fujiwara S, Deguchi S, Magin TM. Disease-associated keratin mutations reduce traction forces and compromise adhesion and collective migration. J Cell Sci 2020; 133:jcs243956. [PMID: 32616561 DOI: 10.1242/jcs.243956] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 06/19/2020] [Indexed: 12/31/2022] Open
Abstract
Keratin intermediate filament (IF) proteins constitute the major cytoskeletal components in epithelial cells. Missense mutations in keratin 5 (K5; also known as KRT5) or keratin 14 (K14; also known as KRT14), highly expressed in the basal epidermis, cause the severe skin blistering disease epidermolysis bullosa simplex (EBS). EBS-associated mutations disrupt keratin networks and change keratinocyte mechanics; however, molecular mechanisms by which mutations shape EBS pathology remain incompletely understood. Here, we demonstrate that, in contrast to keratin-deficient keratinocytes, cells expressing K14R125C, a mutation that causes severe EBS, generate lower traction forces, accompanied by immature focal adhesions with an altered cellular distribution. Furthermore, mutant keratinocytes display reduced directionality during collective migration. Notably, RhoA activity is downregulated in human EBS keratinocytes, and Rho activation rescues stiffness-dependent cell-extracellular matrix (ECM) adhesion formation of EBS keratinocytes. Collectively, our results strongly suggest that intact keratin IF networks regulate mechanotransduction through a Rho signaling pathway upstream of cell-ECM adhesion formation and organized cell migration. Our findings provide insights into the underlying pathophysiology of EBS.This article has an associated First Person interview with the first author of the paper.
Collapse
Affiliation(s)
- Sachiko Fujiwara
- Institute of Biology, Faculty of Life Sciences, University of Leipzig, Leipzig 04103, Germany
| | - Shinji Deguchi
- Division of Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Thomas M Magin
- Institute of Biology, Faculty of Life Sciences, University of Leipzig, Leipzig 04103, Germany
| |
Collapse
|
25
|
Guo Y, Redmond CJ, Leacock KA, Brovkina MV, Ji S, Jaskula-Ranga V, Coulombe PA. Keratin 14-dependent disulfides regulate epidermal homeostasis and barrier function via 14-3-3σ and YAP1. eLife 2020; 9:53165. [PMID: 32369015 PMCID: PMC7250575 DOI: 10.7554/elife.53165] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 05/04/2020] [Indexed: 12/17/2022] Open
Abstract
The intermediate filament protein keratin 14 (K14) provides vital structural support in basal keratinocytes of epidermis. Recent studies evidenced a role for K14-dependent disulfide bonding in the organization and dynamics of keratin IFs in skin keratinocytes. Here we report that knock-in mice harboring a cysteine-to-alanine substitution at Krt14's codon 373 (C373A) exhibit alterations in disulfide-bonded K14 species and a barrier defect secondary to enhanced proliferation, faster transit time and altered differentiation in epidermis. A proteomics screen identified 14-3-3 as K14 interacting proteins. Follow-up studies showed that YAP1, a transcriptional effector of Hippo signaling regulated by 14-3-3sigma in skin keratinocytes, shows aberrant subcellular partitioning and function in differentiating Krt14 C373A keratinocytes. Residue C373 in K14, which is conserved in a subset of keratins, is revealed as a novel regulator of keratin organization and YAP function in early differentiating keratinocytes, with an impact on cell mechanics, homeostasis and barrier function in epidermis.
Collapse
Affiliation(s)
- Yajuan Guo
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States.,Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, United States
| | - Catherine J Redmond
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, United States
| | - Krystynne A Leacock
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States
| | - Margarita V Brovkina
- Graduate Program in Cellular and Molecular Biology, University of Michigan Medical School, Ann Arbor, United States
| | - Suyun Ji
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, United States
| | - Vinod Jaskula-Ranga
- Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore, United States
| | - Pierre A Coulombe
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States.,Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, United States.,Department of Dermatology, University of Michigan Medical School, Ann Arbor, United States.,Rogel Cancer Center, Michigan Medicine, University of Michigan, Ann Arbor, United States
| |
Collapse
|
26
|
Has C, Bauer JW, Bodemer C, Bolling MC, Bruckner-Tuderman L, Diem A, Fine JD, Heagerty A, Hovnanian A, Marinkovich MP, Martinez AE, McGrath JA, Moss C, Murrell DF, Palisson F, Schwieger-Briel A, Sprecher E, Tamai K, Uitto J, Woodley DT, Zambruno G, Mellerio JE. Consensus reclassification of inherited epidermolysis bullosa and other disorders with skin fragility. Br J Dermatol 2020; 183:614-627. [PMID: 32017015 DOI: 10.1111/bjd.18921] [Citation(s) in RCA: 392] [Impact Index Per Article: 98.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Several new genes and clinical subtypes have been identified since the publication in 2014 of the report of the last International Consensus Meeting on Epidermolysis Bullosa (EB). OBJECTIVES We sought to reclassify disorders with skin fragility, with a focus on EB, based on new clinical and molecular data. METHODS This was a consensus expert review. RESULTS In this latest consensus report, we introduce the concept of genetic disorders with skin fragility, of which classical EB represents the prototype. Other disorders with skin fragility, where blisters are a minor part of the clinical picture or are not seen because skin cleavage is very superficial, are classified as separate categories. These include peeling skin disorders, erosive disorders, hyperkeratotic disorders, and connective tissue disorders with skin fragility. Because of the common manifestation of skin fragility, these 'EB-related' disorders should be considered under the EB umbrella in terms of medical and socioeconomic provision of care. CONCLUSIONS The proposed classification scheme should be of value both to clinicians and researchers, emphasizing both clinical and genetic features of EB. What is already known about this topic? Epidermolysis bullosa (EB) is a group of genetic disorders with skin blistering. The last updated recommendations on diagnosis and classification were published in 2014. What does this study add? We introduce the concept of genetic disorders with skin fragility, of which classical EB represents the prototype. Clinical and genetic aspects, genotype-phenotype correlations, disease-modifying factors and natural history of EB are reviewed. Other disorders with skin fragility, e.g. peeling skin disorders, erosive disorders, hyperkeratotic disorders, and connective tissue disorders with skin fragility are classified as separate categories; these 'EB-related' disorders should be considered under the EB umbrella in terms of medical and socioeconomic provision of care. Linked Comment: Pope. Br J Dermatol 2020; 183:603.
Collapse
Affiliation(s)
- C Has
- Department of Dermatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - J W Bauer
- Department of Dermatology and Allergology and EB Haus Austria University Hospital of the Paracelsus Medical University Salzburg, Austria
| | - C Bodemer
- Department of Dermatology, Necker Hospital des Enfants Malades, University Paris-Centre APHP 5, Paris, France
| | - M C Bolling
- University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - L Bruckner-Tuderman
- Department of Dermatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - A Diem
- Department of Dermatology and Allergology and EB Haus Austria University Hospital of the Paracelsus Medical University Salzburg, Austria
| | - J-D Fine
- Vanderbilt University School of Medicine, Nashville, TN, USA; National Epidermolysis Bullosa Registry, Nashville, TN, USA
| | - A Heagerty
- Heart of England Foundation Trust, Birmingham, UK
| | - A Hovnanian
- INSERM UMR1163, Imagine Institute, Department of Genetics, Necker hospital for sick children, Paris University, Paris, France
| | - M P Marinkovich
- Stanford University School of Medicine, Stanford, Palo Alto Veterans Affairs Medical Center CA, USA
| | - A E Martinez
- Dermatology Department, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - J A McGrath
- St John's Institute of Dermatology, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - C Moss
- Birmingham Children's Hospital and University of Birmingham, UK
| | - D F Murrell
- St George Hospital and University of New South Wales, Sydney, Australia
| | - F Palisson
- DEBRA Chile, Facultad de Medicina Clinica Alemana-Universidad del Desarrollo, Santiago, Chile
| | - A Schwieger-Briel
- Department of Pediatric Dermatology, University Children's Hospital Zürich, Zürich, Switzerland
| | - E Sprecher
- Division of Dermatology, Tel Aviv Sourasky Medical Center and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - K Tamai
- Dermatology Department, University of Osaka, Osaka, Japan
| | - J Uitto
- Thomas Jefferson University, Philadelphia, PA, USA
| | - D T Woodley
- University of Southern California, Los Angeles, CA, USA
| | - G Zambruno
- Dermatology Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | - J E Mellerio
- St John's Institute of Dermatology, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
| |
Collapse
|
27
|
Biggs LC, Kim CS, Miroshnikova YA, Wickström SA. Mechanical Forces in the Skin: Roles in Tissue Architecture, Stability, and Function. J Invest Dermatol 2020; 140:284-290. [DOI: 10.1016/j.jid.2019.06.137] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 06/19/2019] [Accepted: 06/27/2019] [Indexed: 01/08/2023]
|
28
|
Lee CH, Kim MS, Li S, Leahy DJ, Coulombe PA. Structure-Function Analyses of a Keratin Heterotypic Complex Identify Specific Keratin Regions Involved in Intermediate Filament Assembly. Structure 2020; 28:355-362.e4. [PMID: 31995743 DOI: 10.1016/j.str.2020.01.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/20/2019] [Accepted: 01/07/2020] [Indexed: 11/29/2022]
Abstract
Intermediate filaments (IFs) provide vital mechanical support in a broad array of cell types. Interference with this role causes cell fragility and accounts for a large number of human diseases. Gaining an understanding of the structure of IFs is paramount to understanding their function and designing therapeutic agents for relevant diseases. Here, we report the 2.6-Å resolution crystal structure of a complex of interacting 2B domains of keratin 5 (K5) and K14. K5 and K14 form a long-range, left-handed coiled coil, with participating α helices aligned in parallel and in register. Follow-up mutagenesis revealed that specific contacts between interacting 2B domains play a crucial role during 10-nm IF assembly, likely at the step of octamer-octamer association. The resulting structural model represents an atomic-resolution visualization of 2B-2B interactions important to filament assembly and provides insight into the defects introduced by mutations in IF genes associated with human skin diseases.
Collapse
Affiliation(s)
- Chang-Hun Lee
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Min-Sung Kim
- Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Shuang Li
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Daniel J Leahy
- Department of Molecular Biosciences, College of Natural Sciences, The University of Texas at Austin, Austin, TX 78712, USA
| | - Pierre A Coulombe
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
| |
Collapse
|
29
|
Vetter A, Jahn K, Bouameur JE, Kiritsi D, Magin TM. Epidermolysis Bullosa Simplex Keratinocytes Show Disturbed Mitochondrial Positioning and Activity. J Invest Dermatol 2020; 140:1438-1442.e5. [PMID: 31958432 DOI: 10.1016/j.jid.2019.10.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 10/25/2019] [Accepted: 10/28/2019] [Indexed: 10/25/2022]
Affiliation(s)
- Alyssa Vetter
- Institute of Biology, Division of Cell and Developmental Biology, University of Leipzig, Leipzig, Germany
| | - Kristin Jahn
- Institute of Biology, Division of Cell and Developmental Biology, University of Leipzig, Leipzig, Germany
| | - Jamal-Eddine Bouameur
- Institute of Biology, Division of Cell and Developmental Biology, University of Leipzig, Leipzig, Germany
| | - Dimitra Kiritsi
- Department of Dermatology, Faculty of Medicine, Medical Center- University of Freiburg, Freiburg, Germany
| | - Thomas M Magin
- Institute of Biology, Division of Cell and Developmental Biology, University of Leipzig, Leipzig, Germany.
| |
Collapse
|
30
|
Cokus SJ, De La Torre M, Medina EF, Rasmussen JP, Ramirez-Gutierrez J, Sagasti A, Wang F. Tissue-Specific Transcriptomes Reveal Gene Expression Trajectories in Two Maturing Skin Epithelial Layers in Zebrafish Embryos. G3 (BETHESDA, MD.) 2019; 9:3439-3452. [PMID: 31431477 PMCID: PMC6778804 DOI: 10.1534/g3.119.400402] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/18/2019] [Indexed: 12/19/2022]
Abstract
Epithelial cells are the building blocks of many organs, including skin. The vertebrate skin initially consists of two epithelial layers, the outer periderm and inner basal cell layers, which have distinct properties, functions, and fates. The embryonic periderm ultimately disappears during development, whereas basal cells proliferate to form the mature, stratified epidermis. Although much is known about mechanisms of homeostasis in mature skin, relatively little is known about the two cell types in pre-stratification skin. To define the similarities and distinctions between periderm and basal skin epithelial cells, we purified them from zebrafish at early development stages and deeply profiled their gene expression. These analyses identified groups of genes whose tissue enrichment changed at each stage, defining gene flow dynamics of maturing vertebrate epithelia. At each of 52 and 72 hr post-fertilization (hpf), more than 60% of genes enriched in skin cells were similarly expressed in both layers, indicating that they were common epithelial genes, but many others were enriched in one layer or the other. Both expected and novel genes were enriched in periderm and basal cell layers. Genes encoding extracellular matrix, junctional, cytoskeletal, and signaling proteins were prominent among those distinguishing the two epithelial cell types. In situ hybridization and BAC transgenes confirmed our expression data and provided new tools to study zebrafish skin. Collectively, these data provide a resource for studying common and distinguishing features of maturing epithelia.
Collapse
Affiliation(s)
- Shawn J Cokus
- Department of Molecular, Cell, and Developmental Biology, University of California Los Angeles and
| | | | - Eric F Medina
- Department of Biology, California State University, Dominguez Hills
| | - Jeffrey P Rasmussen
- Department of Molecular, Cell, and Developmental Biology, University of California Los Angeles and
| | | | - Alvaro Sagasti
- Department of Molecular, Cell, and Developmental Biology, University of California Los Angeles and
| | - Fang Wang
- Department of Biology, California State University, Dominguez Hills
| |
Collapse
|
31
|
Scheffschick A, Kiritsi D, Magin TM. Keratin defects trigger the itch-inducing cytokine thymic stromal lymphopoietin through amphiregulin-epidermal growth factor receptor signaling. J Allergy Clin Immunol 2019; 144:1719-1722.e3. [PMID: 31425777 DOI: 10.1016/j.jaci.2019.07.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 06/25/2019] [Accepted: 07/23/2019] [Indexed: 11/16/2022]
Affiliation(s)
| | - Dimitra Kiritsi
- Department of Dermatology, Medical Faculty, Medical Center-University of Freiburg, Freiburg, Germany
| | - Thomas M Magin
- Institute of Biology, Leipzig University, Leipzig, Germany.
| |
Collapse
|
32
|
Bhattacharjee O, Ayyangar U, Kurbet AS, Ashok D, Raghavan S. Unraveling the ECM-Immune Cell Crosstalk in Skin Diseases. Front Cell Dev Biol 2019; 7:68. [PMID: 31134198 PMCID: PMC6514232 DOI: 10.3389/fcell.2019.00068] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 04/09/2019] [Indexed: 01/06/2023] Open
Abstract
The extracellular matrix (ECM) is a complex network of proteins and proteoglycans secreted by keratinocytes, fibroblasts and immune cells. The function of the skin ECM has expanded from being a scaffold that provides structural integrity, to a more dynamic entity that is constantly remodeled to maintain tissue homeostasis. The ECM functions as ligands for cell surface receptors such as integrins, dystroglycans, and toll-like receptors (TLRs) and regulate cellular signaling and immune cell dynamics. The ECM also acts as a sink for growth factors and cytokines, providing critical cues during epithelial morphogenesis. Dysregulation in the organization and deposition of ECMs lead to a plethora of pathophysiological conditions that are exacerbated by aberrant ECM-immune cell interactions. In this review, we focus on the interplay between ECM and immune cells in the context of skin diseases and also discuss state of the art therapies that target the key molecular players involved.
Collapse
Affiliation(s)
- Oindrila Bhattacharjee
- School of Chemical and Biotechnology, Sastra University, Thanjavur, India
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK Campus, Bangalore, India
| | - Uttkarsh Ayyangar
- School of Chemical and Biotechnology, Sastra University, Thanjavur, India
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK Campus, Bangalore, India
| | - Ambika S. Kurbet
- School of Chemical and Biotechnology, Sastra University, Thanjavur, India
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK Campus, Bangalore, India
| | - Driti Ashok
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK Campus, Bangalore, India
| | - Srikala Raghavan
- Institute for Stem Cell Biology and Regenerative Medicine, GKVK Campus, Bangalore, India
| |
Collapse
|
33
|
Muhsen M, Protschka M, Schneider LE, Müller U, Köhler G, Magin TM, Büttner M, Alber G, Siegemund S. Orf virus (ORFV) infection in a three-dimensional human skin model: Characteristic cellular alterations and interference with keratinocyte differentiation. PLoS One 2019; 14:e0210504. [PMID: 30699132 PMCID: PMC6353139 DOI: 10.1371/journal.pone.0210504] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 12/24/2018] [Indexed: 01/01/2023] Open
Abstract
ORF virus (ORFV) is the causative agent of contagious ecthyma, a pustular dermatitis of small ruminants and humans. Even though the development of lesions caused by ORFV was extensively studied in animals, only limited knowledge exists about the lesion development in human skin. The aim of the present study was to evaluate a three-dimensional (3D) organotypic culture (OTC) as a human skin model for ORFV infection considering lesion development, replication of the virus, viral gene transcription and modulation of differentiation of human keratinocytes by ORFV. ORFV infection of OTC was performed using the ORFV isolate B029 derived from a human patient. The OTC sections showed a similar structure of stratified epidermal keratinocytes as human foreskin and a similar expression profile of the differentiation markers keratin 1 (K1), K10, and loricrin. Upon ORFV infection, OTCs exhibited histological cytopathic changes including hyperkeratosis and ballooning degeneration of the keratinocytes. ORFV persisted for 10 days and was located in keratinocytes of the outer epidermal layers. ORFV-specific early, intermediate and late genes were transcribed, but limited viral spread and restricted cell infection were noticed. ORFV infection resulted in downregulation of K1, K10, and loricrin at the transcriptional level without affecting proliferation as shown by PCNA or Ki-67 expression. In conclusion, OTC provides a suitable model to study the interaction of virus with human keratinocytes in a similar structural setting as human skin and reveals that ORFV infection downregulates several differentiation markers in the epidermis of the human skin, a hitherto unknown feature of dermal ORFV infection in man.
Collapse
Affiliation(s)
- Mahmod Muhsen
- Institute of Immunology/Molecular Pathogenesis, Center for Biotechnology and Biomedicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Martina Protschka
- Institute of Immunology/Molecular Pathogenesis, Center for Biotechnology and Biomedicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Laura E. Schneider
- Institute of Immunology/Molecular Pathogenesis, Center for Biotechnology and Biomedicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Uwe Müller
- Institute of Immunology/Molecular Pathogenesis, Center for Biotechnology and Biomedicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | | | - Thomas M. Magin
- Institute of Biology, Division of Cell and Developmental Biology, University of Leipzig, Leipzig, Germany
| | - Mathias Büttner
- Institute of Immunology/Molecular Pathogenesis, Center for Biotechnology and Biomedicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Gottfried Alber
- Institute of Immunology/Molecular Pathogenesis, Center for Biotechnology and Biomedicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Sabine Siegemund
- Institute of Immunology/Molecular Pathogenesis, Center for Biotechnology and Biomedicine, College of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| |
Collapse
|
34
|
Shah A, Tyagi S, Bharagava RN, Belhaj D, Kumar A, Saxena G, Saratale GD, Mulla SI. Keratin Production and Its Applications: Current and Future Perspective. KERATIN AS A PROTEIN BIOPOLYMER 2019. [DOI: 10.1007/978-3-030-02901-2_2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
35
|
Castela E, Tulic MK, Rozières A, Bourrat E, Nicolas JF, Kanitakis J, Vabres P, Bessis D, Mazereeuw J, Morice-Picard F, Baty D, Berard F, Lacour JP, Passeron T, Chiaverini C. Epidermolysis bullosa simplex generalized severe induces a T helper 17 response and is improved by apremilast treatment. Br J Dermatol 2018; 180:357-364. [PMID: 29932457 DOI: 10.1111/bjd.16897] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND Epidermolysis bullosa simplex generalized severe (EBS-gen sev) is a genetic disorder caused by mutation in the KRT5 or KRT14 genes. Although it is usually considered a mechanical disease, recent data argue for additional inflammatory mechanisms. OBJECTIVES To assess the inflammation in the skin of patients with EBS-gen sev. METHODS A first immunohistochemical retrospective study was performed on frozen skin samples from 17 patients with EBS-gen sev. A second multicentre prospective study was conducted on 10 patients with severe EBS-gen sev. Blister fluid and epidermis were processed for immunochemical analysis and quantitative real-time polymerase chain reaction. Cytokine expression was analysed in blister fluid and compared with that in controls. RESULTS Histological analysis showed a constant dermal perivascular CD4+ lymphocyte infiltrate in skin biopsies of both blister (n = 17) and rubbed skin (n = 5), an epidermal infiltration of neutrophils and eosinophils in 70% of cases, and increased immunostaining for CXCL9 and CXCL10 in blistering skin. High levels of T helper 17 cytokines were detected in lesional skin. Three adult patients with EBS-gen sev were treated with apremilast, with a dramatic improvement of skin blistering and good tolerance. CONCLUSIONS Our study demonstrates the importance of inflammation in patients with EBS-gen sev and underlines the key role for T helper 17 cells in its pathogenesis. In addition, this study provides promising new therapeutic approaches for this disabling disorder.
Collapse
Affiliation(s)
- E Castela
- Department of Dermatology, CHU de Nice, Hôpital Archet 2, 151 Route de Saint Antoine de Ginestière, 06202 Nice CEDEX 2, France.,INSERM U1111-CIRI851, Université Lyon 1, Lyon, France
| | - M K Tulic
- INSERM U1065, Team 12, C3M, Nice, France
| | - A Rozières
- INSERM U1111-CIRI851, Université Lyon 1, Lyon, France
| | - E Bourrat
- MAGEC, Saint-Louis Hospital, Paris, France
| | - J-F Nicolas
- INSERM U1111-CIRI851, Université Lyon 1, Lyon, France.,Department of Allergology and Clinical Immunology, Hospices Civils de Lyon, Lyon, France
| | - J Kanitakis
- Department of Dermatology , Hospices Civils de Lyon, Lyon, France.,Department of Pathology, Hospices Civils de Lyon, Lyon, France
| | - P Vabres
- Department of Dermatology, CHU de Dijon, Dijon, France
| | - D Bessis
- Department of Dermatology, CHU de Montpellier, Montpellier, France
| | | | | | - D Baty
- Scottish Molecular Genetics Consortium, Ninewells Hospital, Dundee, U.K
| | - F Berard
- Department of Allergology and Clinical Immunology, Hospices Civils de Lyon, Lyon, France
| | - J-P Lacour
- Department of Dermatology, CHU de Nice, Hôpital Archet 2, 151 Route de Saint Antoine de Ginestière, 06202 Nice CEDEX 2, France.,CREBHN, CHU de Nice, Nice, France
| | - T Passeron
- Department of Dermatology, CHU de Nice, Hôpital Archet 2, 151 Route de Saint Antoine de Ginestière, 06202 Nice CEDEX 2, France.,INSERM U1065, Team 12, C3M, Nice, France
| | - C Chiaverini
- Department of Dermatology, CHU de Nice, Hôpital Archet 2, 151 Route de Saint Antoine de Ginestière, 06202 Nice CEDEX 2, France.,CREBHN, CHU de Nice, Nice, France
| |
Collapse
|
36
|
Favre B, Begré N, Bouameur JE, Lingasamy P, Conover GM, Fontao L, Borradori L. Desmoplakin interacts with the coil 1 of different types of intermediate filament proteins and displays high affinity for assembled intermediate filaments. PLoS One 2018; 13:e0205038. [PMID: 30286183 PMCID: PMC6171917 DOI: 10.1371/journal.pone.0205038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 09/18/2018] [Indexed: 12/04/2022] Open
Abstract
The interaction of intermediate filaments (IFs) with the cell-cell adhesion complexes desmosomes is crucial for cytoskeletal organization and cell resilience in the epidermis and heart. The intracellular desmosomal protein desmoplakin anchors IFs to the cell adhesion complexes predominantly via its four last carboxy-terminal domains (C-terminus). However, it remains unclear why the C-terminus of desmoplakin interacts with different IF types or if there are different binding affinities for each type of IFs that may influence the stability of cell-specific adhesion complexes. By yeast three-hybrid and fluorescence binding assays, we found that the coiled-coil 1 of the conserved central rod domain of the heterodimeric cytokeratins (Ks) 5 and 14 (K5/K14) was required for their interaction with the C-terminus of desmoplakin, while their unique amino head- and C-tail domains were dispensable. Similar findings were obtained in vitro with K1/K10, and the type III IF proteins desmin and vimentin. Binding assays testing the C-terminus of desmoplakin with assembled K5/K14 and desmin IFs yielded an apparent affinity in the nM range. Our findings reveal that the same conserved domain of IF proteins binds to the C-terminus of desmoplakin, which may help explain the previously reported broad binding IF-specificity to desmoplakin. Our data suggest that desmoplakin high-affinity binding to diverse IF proteins ensures robust linkages of IF cytoskeleton and desmosomes that maintain the structural integrity of cellular adhesion complexes. In summary, our results give new insights into the molecular basis of the IF-desmosome association.
Collapse
Affiliation(s)
- Bertrand Favre
- Department of Dermatology, Inselspital, Bern University Hospital, Bern, Switzerland
- Department for Biomedical Research, University of Bern, Bern, Switzerland
| | - Nadja Begré
- Department of Dermatology, Inselspital, Bern University Hospital, Bern, Switzerland
- Department for Biomedical Research, University of Bern, Bern, Switzerland
| | - Jamal-Eddine Bouameur
- Department of Dermatology, Inselspital, Bern University Hospital, Bern, Switzerland
- Department for Biomedical Research, University of Bern, Bern, Switzerland
| | - Prakash Lingasamy
- Department of Dermatology, Inselspital, Bern University Hospital, Bern, Switzerland
- Department for Biomedical Research, University of Bern, Bern, Switzerland
| | - Gloria M. Conover
- Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas, United States of America
| | - Lionel Fontao
- Department of Dermatology, Geneva University Hospitals, Geneva, Switzerland
| | - Luca Borradori
- Department of Dermatology, Inselspital, Bern University Hospital, Bern, Switzerland
| |
Collapse
|
37
|
Khani P, Ghazi F, Zekri A, Nasri F, Behrangi E, Aghdam AM, Mirzaei H. Keratins and epidermolysis bullosa simplex. J Cell Physiol 2018; 234:289-297. [PMID: 30078200 DOI: 10.1002/jcp.26898] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 06/12/2018] [Indexed: 11/10/2022]
Abstract
Keratin intermediate filaments play an important role in maintaining the integrity of the skin structure. Understanding the importance of this subject is possible with the investigation of keratin defects in epidermolysis bullosa simplex (EBS). Nowadays, in addition to clinical criteria, new molecular diagnostic methods, such as next generation sequencing, can help to distinguish the subgroups of EBS more precisely. Because the most important and most commonly occurring molecular defects in these patients are the defects of keratins 5 and14 (KRT5 and KRT14), comprehending the nature structure of these proteins and their involved processes can be very effective in understanding the pathophysiology of this disease and providing new and effective therapeutic platforms to treat it. Here, we summarized the various aspects of the presence of KRT5 and KRT14 in the epidermis, their relation to the incidence and severity of EBS phenotypes, and the processes with which these proteins can affect them.
Collapse
Affiliation(s)
- Pouria Khani
- Department of Medical Genetics and Molecular Biology, Faculty of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Farideh Ghazi
- Department of Medical Genetics and Molecular Biology, Faculty of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Ali Zekri
- Department of Medical Genetics and Molecular Biology, Faculty of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Farzad Nasri
- Department of Medical Immunology, Faculty of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Elham Behrangi
- Department of Dermatology and Laser Surgery, Clinical Research Center, Rasoul-e-Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Arad Mobasher Aghdam
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Mirzaei
- Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| |
Collapse
|
38
|
Wally V, Hovnanian A, Ly J, Buckova H, Brunner V, Lettner T, Ablinger M, Felder TK, Hofbauer P, Wolkersdorfer M, Lagler FB, Hitzl W, Laimer M, Kitzmüller S, Diem A, Bauer JW. Diacerein orphan drug development for epidermolysis bullosa simplex: A phase 2/3 randomized, placebo-controlled, double-blind clinical trial. J Am Acad Dermatol 2018; 78:892-901.e7. [DOI: 10.1016/j.jaad.2018.01.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/21/2017] [Accepted: 01/14/2018] [Indexed: 12/22/2022]
|
39
|
Jacob JT, Coulombe PA, Kwan R, Omary MB. Types I and II Keratin Intermediate Filaments. Cold Spring Harb Perspect Biol 2018; 10:10/4/a018275. [PMID: 29610398 DOI: 10.1101/cshperspect.a018275] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Keratins-types I and II-are the intermediate-filament-forming proteins expressed in epithelial cells. They are encoded by 54 evolutionarily conserved genes (28 type I, 26 type II) and regulated in a pairwise and tissue type-, differentiation-, and context-dependent manner. Here, we review how keratins serve multiple homeostatic and stress-triggered mechanical and nonmechanical functions, including maintenance of cellular integrity, regulation of cell growth and migration, and protection from apoptosis. These functions are tightly regulated by posttranslational modifications and keratin-associated proteins. Genetically determined alterations in keratin-coding sequences underlie highly penetrant and rare disorders whose pathophysiology reflects cell fragility or altered tissue homeostasis. Furthermore, keratin mutation or misregulation represents risk factors or genetic modifiers for several additional acute and chronic diseases.
Collapse
Affiliation(s)
- Justin T Jacob
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205
| | - Pierre A Coulombe
- Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205.,Departments of Biological Chemistry, Dermatology, and Oncology, School of Medicine, and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland 21205
| | - Raymond Kwan
- Departments of Molecular & Integrative Physiology and Medicine, University of Michigan, Ann Arbor, Michigan 48109
| | - M Bishr Omary
- Departments of Molecular & Integrative Physiology and Medicine, University of Michigan, Ann Arbor, Michigan 48109.,VA Ann Arbor Health Care System, Ann Arbor, Michigan 48105
| |
Collapse
|
40
|
Garcia MA, Nelson WJ, Chavez N. Cell-Cell Junctions Organize Structural and Signaling Networks. Cold Spring Harb Perspect Biol 2018; 10:a029181. [PMID: 28600395 PMCID: PMC5773398 DOI: 10.1101/cshperspect.a029181] [Citation(s) in RCA: 273] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cell-cell junctions link cells to each other in tissues, and regulate tissue homeostasis in critical cell processes that include tissue barrier function, cell proliferation, and migration. Defects in cell-cell junctions give rise to a wide range of tissue abnormalities that disrupt homeostasis and are common in genetic abnormalities and cancers. Here, we discuss the organization and function of cell-cell junctions primarily involved in adhesion (tight junction, adherens junction, and desmosomes) in two different epithelial tissues: a simple epithelium (intestine) and a stratified epithelium (epidermis). Studies in these tissues reveal similarities and differences in the organization and functions of different cell-cell junctions that meet the requirements for the specialized functions of each tissue. We discuss cell-cell junction responses to genetic and environmental perturbations that provide further insights into their roles in maintaining tissue homeostasis.
Collapse
Affiliation(s)
- Miguel A Garcia
- Department of Biology, Stanford University, Stanford, California 94305
| | - W James Nelson
- Department of Biology, Stanford University, Stanford, California 94305
- Departments of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305
| | - Natalie Chavez
- Department of Biology, Stanford University, Stanford, California 94305
| |
Collapse
|
41
|
Peking P, Koller U, Murauer EM. Functional therapies for cutaneous wound repair in epidermolysis bullosa. Adv Drug Deliv Rev 2018; 129:330-343. [PMID: 29248480 DOI: 10.1016/j.addr.2017.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 11/07/2017] [Accepted: 12/09/2017] [Indexed: 12/20/2022]
Abstract
Chronic wounding as a result of recurrent skin blistering in the painful genetic skin disease epidermolysis bullosa, may lead to life-threatening infections, increased risk of tumor formation, and other serious medical complications. Therefore, epidermolysis bullosa patients have an urgent need for optimal wound care and tissue regeneration. Therapeutic strategies using gene-, protein-, and cell-therapies are being developed to improve clinical symptoms, and some of them have already been investigated in early clinical trials. The most favorable options of functional therapies include gene replacement, gene editing, RNA targeting, and harnessing natural gene therapy. This review describes the current progress of the different approaches targeting autologous skin cells, and will discuss the benefits and challenges of their application.
Collapse
|
42
|
Büchau F, Munz C, Has C, Lehmann R, Magin TM. KLHL16 Degrades Epidermal Keratins. J Invest Dermatol 2018; 138:1871-1873. [PMID: 29481904 DOI: 10.1016/j.jid.2018.02.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 02/08/2018] [Accepted: 02/10/2018] [Indexed: 01/31/2023]
Affiliation(s)
- Fanny Büchau
- Institute of Biology and SIKT, University of Leipzig, Leipzig, Germany
| | - Christina Munz
- Institute of Biology and SIKT, University of Leipzig, Leipzig, Germany
| | - Cristina Has
- Department of Dermatology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Robert Lehmann
- Institute of Biology and SIKT, University of Leipzig, Leipzig, Germany
| | | |
Collapse
|
43
|
Komori T, Dainichi T, Masuno Y, Otsuka A, Nakano H, Sawamura D, Ishida-Yamamoto A, Kabashima K. p.Glu477Lys mutation in keratin 5 is not necessarily mortal in generalized severe epidermolysis bullosa simplex. J Dermatol 2018; 45:e209-e210. [PMID: 29464779 DOI: 10.1111/1346-8138.14258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takaya Komori
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Teruki Dainichi
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yuka Masuno
- Department of Dermatology, Uji Tokushukai Medical Center, Uji, Japan
| | - Atsushi Otsuka
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hajime Nakano
- Department of Dermatology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Daisuke Sawamura
- Department of Dermatology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | | | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Singapore Immunology Network (SIgN) and Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore.,PRESTO, Japan Science and Technology Agency, Kawaguchi, Japan
| |
Collapse
|
44
|
Yu W, Gan L, Wu J, Sun J, Jiang Y. Dowling-Degos disease with mutation in the exon 1 of the keratin 5 gene. J Eur Acad Dermatol Venereol 2018. [DOI: 10.1111/jdv.14426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- W. Yu
- Institute of Dermatology; Chinese Academy of Medical Sciences; 12 Jiangwangmiao Road Nanjing 210042 China
| | - L. Gan
- Institute of Dermatology; Chinese Academy of Medical Sciences; 12 Jiangwangmiao Road Nanjing 210042 China
| | - J. Wu
- Institute of Dermatology; Chinese Academy of Medical Sciences; 12 Jiangwangmiao Road Nanjing 210042 China
| | - J. Sun
- Institute of Dermatology; Chinese Academy of Medical Sciences; 12 Jiangwangmiao Road Nanjing 210042 China
| | - Y. Jiang
- Institute of Dermatology; Chinese Academy of Medical Sciences; 12 Jiangwangmiao Road Nanjing 210042 China
| |
Collapse
|
45
|
Sawant M, Schwarz N, Windoffer R, Magin TM, Krieger J, Mücke N, Obara B, Jankowski V, Jankowski J, Wally V, Lettner T, Leube RE. Threonine 150 Phosphorylation of Keratin 5 Is Linked to Epidermolysis Bullosa Simplex and Regulates Filament Assembly and Cell Viability. J Invest Dermatol 2017; 138:627-636. [PMID: 29080682 DOI: 10.1016/j.jid.2017.10.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/11/2017] [Accepted: 10/08/2017] [Indexed: 10/18/2022]
Abstract
A characteristic feature of the skin blistering disease epidermolysis bullosa simplex is keratin filament (KF) network collapse caused by aggregation of the basal epidermal keratin type II (KtyII) K5 and its type I partner keratin 14 (K14). Here, we examine the role of keratin phosphorylation in KF network rearrangement and cellular functions. We detect phosphorylation of the K5 head domain residue T150 in cytoplasmic epidermolysis bullosa simplex granules containing R125C K14 mutants. Expression of phosphomimetic T150D K5 mutants results in impaired KF formation in keratinocytes. The phenotype is enhanced upon combination with other phosphomimetic K5 head domain mutations. Remarkably, introduction of T150D K5 mutants into KtyII-lacking (KtyII-/-) keratinocytes prevents keratin network formation altogether. In contrast, phosphorylation-deficient T150A K5 leads to KFs with reduced branching and turnover. Assembly of T150D K5 is arrested at the heterotetramer stage coinciding with increased heat shock protein association. Finally, reduced cell viability and elevated response to stressors is noted in T150 mutant cells. Taken together, our findings identify T150 K5 phosphorylation as an important determinant of KF network formation and function with a possible role in epidermolysis bullosa simplex pathogenesis.
Collapse
Affiliation(s)
- Mugdha Sawant
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany
| | - Nicole Schwarz
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany
| | - Reinhard Windoffer
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany
| | - Thomas M Magin
- Institute of Biology and Translational Center for Regenerative Medicine, University of Leipzig, Leipzig, Germany
| | - Jan Krieger
- Biophysics of Macromolecules, German Cancer Research Center, Heidelberg, Germany
| | - Norbert Mücke
- Biophysics of Macromolecules, German Cancer Research Center, Heidelberg, Germany
| | - Boguslaw Obara
- School of Engineering and Computing Sciences, Durham University, Durham, UK
| | - Vera Jankowski
- Institut für Molekulare Herz-Kreislaufforschung, RWTH Aachen University, Aachen, Germany
| | - Joachim Jankowski
- Institut für Molekulare Herz-Kreislaufforschung, RWTH Aachen University, Aachen, Germany; School for Cardiovascular Diseases, Maastricht University, Maastricht, The Netherlands
| | - Verena Wally
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - Thomas Lettner
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology, University Hospital Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - Rudolf E Leube
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany.
| |
Collapse
|
46
|
Jiang M, Li B, Zhang J, Hu L, Dang E, Wang G. Vascular endothelial growth factor driving aberrant keratin expression pattern contributes to the pathogenesis of psoriasis. Exp Cell Res 2017; 360:310-319. [DOI: 10.1016/j.yexcr.2017.09.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 09/13/2017] [Accepted: 09/15/2017] [Indexed: 12/24/2022]
|
47
|
Hatzfeld M, Keil R, Magin TM. Desmosomes and Intermediate Filaments: Their Consequences for Tissue Mechanics. Cold Spring Harb Perspect Biol 2017; 9:a029157. [PMID: 28096266 PMCID: PMC5453391 DOI: 10.1101/cshperspect.a029157] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Adherens junctions (AJs) and desmosomes connect the actin and keratin filament networks of adjacent cells into a mechanical unit. Whereas AJs function in mechanosensing and in transducing mechanical forces between the plasma membrane and the actomyosin cytoskeleton, desmosomes and intermediate filaments (IFs) provide mechanical stability required to maintain tissue architecture and integrity when the tissues are exposed to mechanical stress. Desmosomes are essential for stable intercellular cohesion, whereas keratins determine cell mechanics but are not involved in generating tension. Here, we summarize the current knowledge of the role of IFs and desmosomes in tissue mechanics and discuss whether the desmosome-keratin scaffold might be actively involved in mechanosensing and in the conversion of chemical signals into mechanical strength.
Collapse
Affiliation(s)
- Mechthild Hatzfeld
- Institute of Molecular Medicine, Division of Pathobiochemistry, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - René Keil
- Institute of Molecular Medicine, Division of Pathobiochemistry, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - Thomas M Magin
- Institute of Biology, Division of Cell and Developmental Biology and Saxonian Incubator for Clinical Translation (SIKT), University of Leipzig, 04103 Leipzig, Germany
| |
Collapse
|
48
|
|
49
|
Blume-Peytavi U, Tan J, Tennstedt D, Boralevi F, Fabbrocini G, Torrelo A, Soares-Oliveira R, Haftek M, Rossi AB, Thouvenin MD, Mangold J, Galliano MF, Hernandez-Pigeon H, Aries MF, Rouvrais C, Bessou-Touya S, Duplan H, Castex-Rizzi N, Mengeaud V, Ferret PJ, Clouet E, Saint Aroman M, Carrasco C, Coutanceau C, Guiraud B, Boyal S, Herman A, Delga H, Biniek K, Dauskardt R. Fragility of epidermis in newborns, children and adolescents. J Eur Acad Dermatol Venereol 2016; 30 Suppl 4:3-56. [PMID: 27062556 DOI: 10.1111/jdv.13636] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 02/10/2016] [Accepted: 02/17/2016] [Indexed: 12/18/2022]
Abstract
Within their first days of life, newborns' skin undergoes various adaptation processes needed to accommodate the transition from the wet uterine environment to the dry atmosphere. The skin of newborns and infants is considered as a physiological fragile skin, a skin with lower resistance to aggressions. Fragile skin is divided into four categories up to its origin: physiological fragile skin (age, location), pathological fragile skin (acute and chronic), circumstantial fragile skin (due to environmental extrinsic factors or intrinsic factors such as stress) and iatrogenic fragile skin. Extensive research of the past 10 years have proven evidence that at birth albeit showing a nearly perfect appearance, newborn skin is structurally and functionally immature compared to adult skin undergoing a physiological maturation process after birth at least throughout the first year of life. This article is an overview of all known data about fragility of epidermis in 'fragile populations': newborns, children and adolescents. It includes the recent pathological, pathophysiological and clinical data about fragility of epidermis in various dermatological diseases, such as atopic dermatitis, acne, rosacea, contact dermatitis, irritative dermatitis and focus on UV protection.
Collapse
Affiliation(s)
- U Blume-Peytavi
- Department of Dermatology and Allergy, Clinical Research Center for Hair and Skin Science, Charité-Universitätsmedizin, Berlin, Germany
| | - J Tan
- Department of Medicine, Faculty of Medicine, Schulich School of Medicine and Dentistry, Western University, Windsor campus, Windsor, ON, Canada.,Windsor Clinical Research Inc., Windsor campus, Windsor, ON, Canada
| | - D Tennstedt
- Department of Dermatology, Saint-Luc University Clinics, Brussels, Belgium
| | - F Boralevi
- Pediatric Dermatology, Pellegrin Hospital, Bordeaux, France
| | - G Fabbrocini
- Department of Dermatology, University Hospital of Naples, Naples, Italy
| | - A Torrelo
- Pediatric Dermatology, Hospital del Niño Jesús, Madrid, Spain
| | | | - M Haftek
- University Lyon 1, Lyon, France.,University Lyon 1, EA4169, "Fundamental, clinical and therapeutic aspects of the skin barrier function", Lyon, France
| | - A B Rossi
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Department of Dermatology, Toulouse University hospital, France
| | - M D Thouvenin
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France
| | - J Mangold
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France
| | - M F Galliano
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - H Hernandez-Pigeon
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - M F Aries
- Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - C Rouvrais
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France
| | - S Bessou-Touya
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Medical Department, Pierre Fabre Research and Laboratoires Dermatologiques A-Derma, Lavaur, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - H Duplan
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - N Castex-Rizzi
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - V Mengeaud
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France
| | - P J Ferret
- Pierre Fabre Dermo-Cosmétique Research & Development, Toxicology Division, Vigoulet-Auzil, France.,Pierre Fabre Dermo-Cosmétique Research & Developement Center, Toxicology division, Vigoulet, France
| | - E Clouet
- Pierre Fabre Dermo-Cosmétique Research & Development, Toxicology Division, Vigoulet-Auzil, France.,Pierre Fabre Dermo-Cosmétique Research & Developement Center, Toxicology division, Vigoulet, France
| | | | - C Carrasco
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - C Coutanceau
- Medical Department, Pierre Fabre Research and Laboratoires Dermatologiques A-Derma, Lavaur, France
| | - B Guiraud
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France
| | - S Boyal
- Windsor Clinical Research Inc., Windsor campus, Windsor, ON, Canada
| | - A Herman
- Department of Dermatology, Saint-Luc University Clinics, Brussels, Belgium
| | - H Delga
- Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - K Biniek
- Department of Materials Science and Engineering, Stanford University hospital, Stanford, CA, USA
| | - R Dauskardt
- Department of Materials Science and Engineering, Stanford University hospital, Stanford, CA, USA
| |
Collapse
|
50
|
Sternopygus macrurus electric organ transcriptome and cell size exhibit insensitivity to short-term electrical inactivity. ACTA ACUST UNITED AC 2016; 110:233-244. [PMID: 27864094 DOI: 10.1016/j.jphysparis.2016.11.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/03/2016] [Accepted: 11/13/2016] [Indexed: 11/22/2022]
Abstract
Electrical activity is an important regulator of cellular function and gene expression in electrically excitable cell types. In the weakly electric teleost fish Sternopygus macrurus, electrocytes, i.e., the current-producing cells of the electric organ, derive from a striated muscle lineage. Mature electrocytes are larger than muscle fibers, do not contain sarcomeres, and are driven continuously at frequencies higher than those exerted on muscle cells. Previous work showed that the removal of electrical activity by spinal cord transection (ST) for two and five weeks led to an upregulation of some sarcomeric proteins and a decrease in electrocyte size. To test whether changes in gene transcription preceded these phenotypic changes, we determined the sensitivity of electrocyte gene expression to electrical inactivity periods of two and five days after ST. Whole tissue gene expression profiles using deep RNA sequencing showed minimal alterations in the levels of myogenic transcription factor and sarcomeric transcripts after either ST period. Moreover, while analysis of differentially expressed genes showed a transient upregulation of genes associated with proteolytic mechanisms at two days and an increase in mRNA levels of cytoskeletal genes at five days after electrical silencing, electrocyte size was not affected. Electrical inactivity also resulted in the downregulation of genes that were classified into enriched clusters associated with functions of axon migration and synapse structure. Overall, these data demonstrate that unlike tissues in the myogenic lineage in other vertebrate species, regulation of gene transcription and cell size in the muscle-like electrocytes of S. macrurus is highly insensitive to short-term electrical inactivity. Moreover, together with data obtained from control and long-term ST studies, the present data suggest that neural input might influence post-transcriptional processes to affect the mature electrocyte phenotype.
Collapse
|