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Montanari J, Schwob L, Marie-Brasset A, Vinatier C, Lepleux C, Antoine R, Guicheux J, Poully JC, Chevalier F. Pilot screening of potential matrikines resulting from collagen breakages through ionizing radiation. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2024; 63:337-350. [PMID: 39115696 DOI: 10.1007/s00411-024-01086-z] [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: 03/15/2024] [Accepted: 07/12/2024] [Indexed: 08/23/2024]
Abstract
Little is known regarding radiation-induced matrikines and the possible degradation of extracellular matrix following therapeutic irradiation. The goal of this study was to determine if irradiation can cut collagen proteins at specific sites, inducing potentially biologically active peptides against cartilage cells. Chondrocytes cultured as 3D models were evaluated for extracellular matrix production. Bystander molecules were analyzed in vitro in the conditioned medium of X-irradiated chondrocytes. Preferential breakage sites were analyzed in collagen polypeptide by mass spectrometry and resulting peptides were tested against chondrocytes. 3D models of chondrocytes displayed a light extracellular matrix able to maintain the structure. Irradiated and bystander chondrocytes showed a surprising radiation sensitivity at low doses, characteristic of the presence of bystander factors, particularly following 0.1 Gy. The glycine-proline peptidic bond was observed as a preferential cleavage site and a possible weakness of the collagen polypeptide after irradiation. From the 46 collagen peptides analyzed against chondrocytes culture, 20 peptides induced a reduction of viability and 5 peptides induced an increase of viability at the highest concentration between 0.1 and 1 µg/ml. We conclude that irradiation promoted a site-specific degradation of collagen. The potentially resulting peptides induce negative or positive regulations of chondrocyte growth. Taken together, these results suggest that ionizing radiation causes a degradation of cartilage proteins, leading to a functional unbalance of cartilage homeostasis after exposure, contributing to cartilage dysfunction.
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Affiliation(s)
- Juliette Montanari
- UMR6252 CIMAP, CEA - CNRS - ENSICAEN - Université de Caen Normandie, Caen, 14000, France
| | - Lucas Schwob
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
| | - Aurélie Marie-Brasset
- UMR6252 CIMAP, CEA - CNRS - ENSICAEN - Université de Caen Normandie, Caen, 14000, France
| | - Claire Vinatier
- Nantes Université, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, Oniris, Nantes, F-44000, France
| | - Charlotte Lepleux
- UMR6252 CIMAP, CEA - CNRS - ENSICAEN - Université de Caen Normandie, Caen, 14000, France
| | - Rodolphe Antoine
- Institut Lumière Matière, University of Lyon, Université Claude Bernard Lyon 1, CNRS, Lyon, F-69622, France
| | - Jérôme Guicheux
- Nantes Université, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, Oniris, Nantes, F-44000, France
| | - Jean-Christophe Poully
- UMR6252 CIMAP, CEA - CNRS - ENSICAEN - Université de Caen Normandie, Caen, 14000, France.
- UMR6252 CIMAP, CEA-CNRS-ENSICAEN-Université de Caen Normandie, Bd Henri Becquerel - BP 55027, CAEN Cedex 05, F-14076, France.
| | - François Chevalier
- UMR6252 CIMAP, CEA - CNRS - ENSICAEN - Université de Caen Normandie, Caen, 14000, France.
- UMR6252 CIMAP, CEA-CNRS-ENSICAEN-Université de Caen Normandie, Bd Henri Becquerel - BP 55027, CAEN Cedex 05, F-14076, France.
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2
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Platt CI, Stewart-McGuinness C, Eckersley A, Wilkins L, Sherratt MJ. Acute exposure to ultraviolet radiation targets proteins involved in collagen fibrillogenesis. Front Physiol 2024; 15:1352161. [PMID: 38559576 PMCID: PMC10978599 DOI: 10.3389/fphys.2024.1352161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 02/19/2024] [Indexed: 04/04/2024] Open
Abstract
Introduction: Exposure to chronic, low-dose UV irradiation (UVR) can lead to premature ageing of the skin. Understanding which proteins are affected by acute UVR and photo-dynamically produced reactive oxygen species (ROS) could help to inform strategies to delay photoageing. Conventional biochemical analyses can be used to characterize UVR/ROS-induced damage on a protein-by-protein basis and we have previously shown using SDS-PAGE that collagen I and plasma fibronectin are respectively resistant and susceptible to physiological doses of UVR. The aim of this study was to screen a complex proteome for UVR-affected proteins. Methods: This study employed a sensitive mass spectrometry technique (peptide location fingerprinting: PLF) which can identify structure associated differences following trypsin digestion to characterize the impact of UVR exposure on purified collagen I and tissue fibronectin and to identify UVR-susceptible proteins in an ECM-enriched proteome. Results: Using LC/MS-MS and PLF we show that purified mature type-I collagen is resistant to UVR, whereas purified tissue fibronectin is susceptible. UV irradiation of a human dermal fibroblast-deposited ECM-enriched proteome in vitro, followed by LC/MS-MS and PLF analysis revealed two protein cluster groups of UV susceptible proteins involved in i) matrix collagen fibril assembly and ii) protein translation and motor activity. Furthermore, PLF highlighted UV susceptible domains within targeted matrix proteins, suggesting that UV damage of matrix proteins is localized. Discussion: Here we show that PLF can be used to identify protein targets of UVR and that collagen accessory proteins may be key targets in UVR exposed tissues.
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Affiliation(s)
- Christopher I. Platt
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Science, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Callum Stewart-McGuinness
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Science, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Alexander Eckersley
- Division of Musculoskeletal & Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Loren Wilkins
- School of Medical Sciences, The University of Manchester, Manchester, United Kingdom
| | - Michael J. Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Science, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
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3
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Matrikines as mediators of tissue remodelling. Adv Drug Deliv Rev 2022; 185:114240. [PMID: 35378216 DOI: 10.1016/j.addr.2022.114240] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/21/2022] [Accepted: 03/26/2022] [Indexed: 11/21/2022]
Abstract
Extracellular matrix (ECM) proteins confer biomechanical properties, maintain cell phenotype and mediate tissue repair (via release of sequestered cytokines and proteases). In contrast to intracellular proteomes, where proteins are monitored and replaced over short time periods, many ECM proteins function for years (decades in humans) without replacement. The longevity of abundant ECM proteins, such as collagen I and elastin, leaves them vulnerable to damage accumulation and their host organs prone to chronic, age-related diseases. However, ECM protein fragmentation can potentially produce peptide cytokines (matrikines) which may exacerbate and/or ameliorate age- and disease-related ECM remodelling. In this review, we discuss ECM composition, function and degradation and highlight examples of endogenous matrikines. We then critically and comprehensively analyse published studies of matrix-derived peptides used as topical skin treatments, before considering the potential for improvements in the discovery and delivery of novel matrix-derived peptides to skin and internal organs. From this, we conclude that while the translational impact of matrix-derived peptide therapeutics is evident, the mechanisms of action of these peptides are poorly defined. Further, well-designed, multimodal studies are required.
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Charoenchon N, Rhodes LE, Nicolaou A, Williamson G, Watson RE, Farrar MD. Ultraviolet radiation‐induced degradation of dermal extracellular matrix and protection by green tea catechins: a randomised controlled trial. Clin Exp Dermatol 2022; 47:1314-1323. [PMID: 35279873 PMCID: PMC9320810 DOI: 10.1111/ced.15179] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/17/2022] [Accepted: 03/11/2022] [Indexed: 11/29/2022]
Abstract
Background Aim Methods Results Conclusions
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Affiliation(s)
- Nisamanee Charoenchon
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences School of Biological Sciences Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre Manchester UK
| | - Lesley E. Rhodes
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences School of Biological Sciences Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre Manchester UK
- Photobiology Unit, Dermatology Centre, Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre Manchester UK
| | - Anna Nicolaou
- Laboratory for Lipidomics and Lipid Biology, Division of Pharmacy and Optometry School of Health Sciences Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre Manchester UK
| | - Gary Williamson
- Department of Nutrition, Dietetics and Food, School of Clinical Sciences at Monash Health, Faculty of Medicine, Nursing and Health Sciences Monash University Victoria Australia
| | - Rachel E.B. Watson
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences School of Biological Sciences Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre Manchester UK
| | - Mark D. Farrar
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences School of Biological Sciences Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre Manchester UK
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Tuieng RJ, Cartmell SH, Kirwan CC, Sherratt MJ. The Effects of Ionising and Non-Ionising Electromagnetic Radiation on Extracellular Matrix Proteins. Cells 2021; 10:3041. [PMID: 34831262 PMCID: PMC8616186 DOI: 10.3390/cells10113041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/28/2021] [Accepted: 10/30/2021] [Indexed: 02/07/2023] Open
Abstract
Exposure to sub-lethal doses of ionising and non-ionising electromagnetic radiation can impact human health and well-being as a consequence of, for example, the side effects of radiotherapy (therapeutic X-ray exposure) and accelerated skin ageing (chronic exposure to ultraviolet radiation: UVR). Whilst attention has focused primarily on the interaction of electromagnetic radiation with cells and cellular components, radiation-induced damage to long-lived extracellular matrix (ECM) proteins has the potential to profoundly affect tissue structure, composition and function. This review focuses on the current understanding of the biological effects of ionising and non-ionising radiation on the ECM of breast stroma and skin dermis, respectively. Although there is some experimental evidence for radiation-induced damage to ECM proteins, compared with the well-characterised impact of radiation exposure on cell biology, the structural, functional, and ultimately clinical consequences of ECM irradiation remain poorly defined.
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Affiliation(s)
- Ren Jie Tuieng
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK;
| | - Sarah H. Cartmell
- Department of Materials, School of Natural Sciences, Faculty of Science and Engineering and The Henry Royce Institute, Royce Hub Building, University of Manchester, Manchester M13 9PL, UK;
| | - Cliona C. Kirwan
- Division of Cancer Sciences and Manchester Breast Centre, Oglesby Cancer Research Building, Manchester Cancer Research Centre, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M20 4BX, UK;
| | - Michael J. Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine and Manchester Breast Centre, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
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6
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Šínová R, Pavlík V, Ondrej M, Velebný V, Nešporová K. Hyaluronan: A key player or just a bystander in skin photoaging? Exp Dermatol 2021; 31:442-458. [PMID: 34726319 DOI: 10.1111/exd.14491] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 10/07/2021] [Accepted: 10/29/2021] [Indexed: 02/06/2023]
Abstract
Photoaged skin exhibits signs of inflammation, DNA damage and changes in morphology that are visible at the macroscopic and microscopic levels. Photoaging also affects the extracellular matrix (ECM) including hyaluronan (HA), the main polysaccharide component thereof. HA is a structurally simple but biologically complex molecule that serves as a water-retaining component and provides both a scaffold for a number of the proteins of the ECM and the ligand for cellular receptors. The study provides an overview of the literature concerning the changes in HA amount, size and metabolism, and the potential role of HA in photoaging. We also suggest novel HA contributions to photoaging based on our knowledge of the role of HA in other pathological processes, including the senescence and inflammation-triggered ECM reorganization. Moreover, we discuss potential direct or indirect intervention to mitigate photoaging that targets the hyaluronan metabolism, as well as supplementation.
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Affiliation(s)
- Romana Šínová
- Contipro a.s., Dolní Dobrouč, Czech Republic.,Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Vojtěch Pavlík
- Contipro a.s., Dolní Dobrouč, Czech Republic.,Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Martin Ondrej
- Contipro a.s., Dolní Dobrouč, Czech Republic.,Department of Radiobiology, Faculty of Military Health Sciences, University of Defense in Brno, Hradec Kralove, Czech Republic
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7
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Eckersley A, Ozols M, O'Connor C, Bell M, Sherratt MJ. Predicting and characterising protein damage in the extracellular matrix. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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8
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Ozols M, Eckersley A, Mellody KT, Mallikarjun V, Warwood S, O'Cualain R, Knight D, Watson REB, Griffiths CEM, Swift J, Sherratt MJ. Peptide location fingerprinting reveals modification-associated biomarker candidates of ageing in human tissue proteomes. Aging Cell 2021; 20:e13355. [PMID: 33830638 PMCID: PMC8135079 DOI: 10.1111/acel.13355] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 02/18/2021] [Accepted: 03/15/2021] [Indexed: 12/25/2022] Open
Abstract
Although dysfunctional protein homeostasis (proteostasis) is a key factor in many age-related diseases, the untargeted identification of structurally modified proteins remains challenging. Peptide location fingerprinting is a proteomic analysis technique capable of identifying structural modification-associated differences in mass spectrometry (MS) data sets of complex biological samples. A new webtool (Manchester Peptide Location Fingerprinter), applied to photoaged and intrinsically aged skin proteomes, can relatively quantify peptides and map statistically significant differences to regions within protein structures. New photoageing biomarker candidates were identified in multiple pathways including extracellular matrix organisation (collagens and proteoglycans), protein synthesis and folding (ribosomal proteins and TRiC complex subunits), cornification (keratins) and hemidesmosome assembly (plectin and integrin α6β4). Crucially, peptide location fingerprinting uniquely identified 120 protein biomarker candidates in the dermis and 71 in the epidermis which were modified as a consequence of photoageing but did not differ significantly in relative abundance (measured by MS1 ion intensity). By applying peptide location fingerprinting to published MS data sets, (identifying biomarker candidates including collagen V and versican in ageing tendon) we demonstrate the potential of the MPLF webtool for biomarker discovery.
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Affiliation(s)
- Matiss Ozols
- Division of Cell Matrix Biology & Regenerative Medicine The University of Manchester Manchester UK
| | - Alexander Eckersley
- Division of Cell Matrix Biology & Regenerative Medicine The University of Manchester Manchester UK
| | - Kieran T. Mellody
- Division of Musculoskeletal & Dermatological Sciences The University of Manchester Manchester UK
| | - Venkatesh Mallikarjun
- Division of Cell Matrix Biology & Regenerative Medicine The University of Manchester Manchester UK
- Wellcome Centre for Cell‐Matrix Research The University of Manchester Manchester UK
| | - Stacey Warwood
- Division of Cell Matrix Biology & Regenerative Medicine The University of Manchester Manchester UK
- Biological Mass Spectrometry Core Research Facility School of Biological Sciences Faculty of Biology, Medicine and Health The University of Manchester Manchester UK
| | - Ronan O'Cualain
- Division of Cell Matrix Biology & Regenerative Medicine The University of Manchester Manchester UK
- Biological Mass Spectrometry Core Research Facility School of Biological Sciences Faculty of Biology, Medicine and Health The University of Manchester Manchester UK
| | - David Knight
- Division of Cell Matrix Biology & Regenerative Medicine The University of Manchester Manchester UK
- Biological Mass Spectrometry Core Research Facility School of Biological Sciences Faculty of Biology, Medicine and Health The University of Manchester Manchester UK
| | - Rachel E. B. Watson
- Division of Musculoskeletal & Dermatological Sciences The University of Manchester Manchester UK
- NIHR Manchester Biomedical Research CentreCentral Manchester University Hospitals NHS Foundation TrustManchester Academic Health Science Centre Manchester UK
| | - Christopher E. M. Griffiths
- Division of Musculoskeletal & Dermatological Sciences The University of Manchester Manchester UK
- NIHR Manchester Biomedical Research CentreCentral Manchester University Hospitals NHS Foundation TrustManchester Academic Health Science Centre Manchester UK
| | - Joe Swift
- Division of Cell Matrix Biology & Regenerative Medicine The University of Manchester Manchester UK
- Wellcome Centre for Cell‐Matrix Research The University of Manchester Manchester UK
| | - Michael J. Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine The University of Manchester Manchester UK
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9
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Ozols M, Eckersley A, Platt CI, Stewart-McGuinness C, Hibbert SA, Revote J, Li F, Griffiths CEM, Watson REB, Song J, Bell M, Sherratt MJ. Predicting Proteolysis in Complex Proteomes Using Deep Learning. Int J Mol Sci 2021; 22:3071. [PMID: 33803033 PMCID: PMC8002881 DOI: 10.3390/ijms22063071] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/10/2021] [Accepted: 03/12/2021] [Indexed: 12/27/2022] Open
Abstract
Both protease- and reactive oxygen species (ROS)-mediated proteolysis are thought to be key effectors of tissue remodeling. We have previously shown that comparison of amino acid composition can predict the differential susceptibilities of proteins to photo-oxidation. However, predicting protein susceptibility to endogenous proteases remains challenging. Here, we aim to develop bioinformatics tools to (i) predict cleavage site locations (and hence putative protein susceptibilities) and (ii) compare the predicted vulnerabilities of skin proteins to protease- and ROS-mediated proteolysis. The first goal of this study was to experimentally evaluate the ability of existing protease cleavage site prediction models (PROSPER and DeepCleave) to identify experimentally determined MMP9 cleavage sites in two purified proteins and in a complex human dermal fibroblast-derived extracellular matrix (ECM) proteome. We subsequently developed deep bidirectional recurrent neural network (BRNN) models to predict cleavage sites for 14 tissue proteases. The predictions of the new models were tested against experimental datasets and combined with amino acid composition analysis (to predict ultraviolet radiation (UVR)/ROS susceptibility) in a new web app: the Manchester proteome susceptibility calculator (MPSC). The BRNN models performed better in predicting cleavage sites in native dermal ECM proteins than existing models (DeepCleave and PROSPER), and application of MPSC to the skin proteome suggests that: compared with the elastic fiber network, fibrillar collagens may be susceptible primarily to protease-mediated proteolysis. We also identify additional putative targets of oxidative damage (dermatopontin, fibulins and defensins) and protease action (laminins and nidogen). MPSC has the potential to identify potential targets of proteolysis in disparate tissues and disease states.
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Affiliation(s)
- Matiss Ozols
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Manchester M13 9PT, UK; (A.E.); (C.I.P.); (C.S.-M.); (S.A.H.)
| | - Alexander Eckersley
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Manchester M13 9PT, UK; (A.E.); (C.I.P.); (C.S.-M.); (S.A.H.)
| | - Christopher I. Platt
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Manchester M13 9PT, UK; (A.E.); (C.I.P.); (C.S.-M.); (S.A.H.)
| | - Callum Stewart-McGuinness
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Manchester M13 9PT, UK; (A.E.); (C.I.P.); (C.S.-M.); (S.A.H.)
| | - Sarah A. Hibbert
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Manchester M13 9PT, UK; (A.E.); (C.I.P.); (C.S.-M.); (S.A.H.)
| | - Jerico Revote
- Monash Bioinformatics Platform, Monash University, Melbourne, VIC 3800, Australia;
- Infection and Immunity Program, Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800, Australia;
| | - Fuyi Li
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3800, Australia;
| | - Christopher E. M. Griffiths
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, and Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9PT, UK; (C.E.M.G.); (R.E.B.W.)
- NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9WL, UK
| | - Rachel E. B. Watson
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, and Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9PT, UK; (C.E.M.G.); (R.E.B.W.)
- NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9WL, UK
| | - Jiangning Song
- Infection and Immunity Program, Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800, Australia;
- Monash Centre for Data Science, Faculty of Information Technology, Monash University, Melbourne, VIC 3800, Australia
| | - Mike Bell
- Research and Development, Walgreens Boots Alliance, Thane Road, Nottingham NG90 1BS, UK;
| | - Michael J. Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Manchester M13 9PT, UK; (A.E.); (C.I.P.); (C.S.-M.); (S.A.H.)
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10
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Heinz A. Elastic fibers during aging and disease. Ageing Res Rev 2021; 66:101255. [PMID: 33434682 DOI: 10.1016/j.arr.2021.101255] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/29/2020] [Accepted: 12/30/2020] [Indexed: 02/08/2023]
Abstract
Elastic fibers are essential constituents of the extracellular matrix of higher vertebrates and endow several tissues and organs including lungs, skin and blood vessels with elasticity and resilience. During the human lifespan, elastic fibers are exposed to a variety of enzymatic, chemical and biophysical influences, and accumulate damage due to their low turnover. Aging of elastin and elastic fibers involves enzymatic degradation, oxidative damage, glycation, calcification, aspartic acid racemization, binding of lipids and lipid peroxidation products, carbamylation and mechanical fatigue. These processes can trigger an impairment or loss of elastic fiber function and are associated with severe pathologies. There are different inherited or acquired pathological conditions, which influence the structure and function of elastic fibers and microfibrils predominantly in the cardiorespiratory system and skin. Inherited elastic-fiber pathologies have a direct or indirect impact on elastic-fiber formation due to mutations in the fibrillin genes (fibrillinopathies), in the elastin gene (elastinopathies) or in genes encoding proteins that are associated with microfibrils or elastic fibers. Acquired elastic-fiber pathologies appear age-related or as a result of multiple factors impairing tissue homeostasis. This review gives an overview on the fate of elastic fibers over the human lifespan in health and disease.
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Roig-Rosello E, Rousselle P. The Human Epidermal Basement Membrane: A Shaped and Cell Instructive Platform That Aging Slowly Alters. Biomolecules 2020; 10:E1607. [PMID: 33260936 PMCID: PMC7760980 DOI: 10.3390/biom10121607] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 12/11/2022] Open
Abstract
One of the most important functions of skin is to act as a protective barrier. To fulfill this role, the structural integrity of the skin depends on the dermal-epidermal junction-a complex network of extracellular matrix macromolecules that connect the outer epidermal layer to the underlying dermis. This junction provides both a structural support to keratinocytes and a specific niche that mediates signals influencing their behavior. It displays a distinctive microarchitecture characterized by an undulating pattern, strengthening dermal-epidermal connectivity and crosstalk. The optimal stiffness arising from the overall molecular organization, together with characteristic anchoring complexes, keeps the dermis and epidermis layers extremely well connected and capable of proper epidermal renewal and regeneration. Due to intrinsic and extrinsic factors, a large number of structural and biological changes accompany skin aging. These changes progressively weaken the dermal-epidermal junction substructure and affect its functions, contributing to the gradual decline in overall skin physiology. Most changes involve reduced turnover or altered enzymatic or non-enzymatic post-translational modifications, compromising the mechanical properties of matrix components and cells. This review combines recent and older data on organization of the dermal-epidermal junction, its mechanical properties and role in mechanotransduction, its involvement in regeneration, and its fate during the aging process.
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Affiliation(s)
- Eva Roig-Rosello
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS-Université Lyon 1, SFR BioSciences Gerland-Lyon Sud, 7 Passage du Vercors, 69367 Lyon, France;
- Roger Gallet SAS, 4 rue Euler, 75008 Paris, France
| | - Patricia Rousselle
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS-Université Lyon 1, SFR BioSciences Gerland-Lyon Sud, 7 Passage du Vercors, 69367 Lyon, France;
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12
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Investigation of fibrillin microfibrils in the canine cruciate ligament in dogs with different predispositions to ligament rupture. Res Vet Sci 2020; 133:53-58. [PMID: 32937286 DOI: 10.1016/j.rvsc.2020.09.006] [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: 02/27/2020] [Revised: 06/03/2020] [Accepted: 09/08/2020] [Indexed: 11/20/2022]
Abstract
Cranial cruciate ligament disease (CCLD) is the most common cause of pelvic limb lameness in dogs but its precise aetiopathogenesis is uncertain. Fibrillin microfibrils (FM) are complex macro-molecular assemblies found in many tissues including ligaments, where they are thought to play an important mechanical role. We hypothesised that FM ultrastructural variation correlates with the differing predisposition of canine breeds to CCLD. Non-diseased cranial and caudal cruciate ligaments (CCLs and CaCLs) were obtained from Greyhound (GH) and Staffordshire Bull Terrier (SBT) cadavers. Fibrillin microfibrils were extracted from the ligaments by bacterial collagenase digestion, purified by size-exclusion chromatography and subsequently visualized by atomic force microscopy (AFM). With AFM, FMs have a characteristic beads-on-a-string appearance. For each FM, periodicity (bead-bead distance) and length (number of beads/FM) was measured. Fibrillin microfibril length was found to be similar for GH and SBT, with non-significant inter-breed and inter-ligament differences. Fibrillin microfibril periodicity varied when comparing GH and SBT for CCL (GH 60.2 ± 1.4 nm; SBT 56.2 ± 0.8 nm) and CaCL (GH 55.5 ± 1.6 nm; SBT 61.2 ± 1.2 nm). A significant difference was found in the periodicity distribution when comparing CCL for both breeds (P < 0.00001), further, intra-breed differences in CCL vs CaCL were statistically significant within both breeds (P < 0.00001). The breed at low risk of CCLD exhibited a periodicity profile which may be suggestive of a repair and remodelling within the CCL.
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13
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Langton AK, Tsoureli-Nikita E, Merrick H, Zhao X, Antoniou C, Stratigos A, Akhtar R, Derby B, Sherratt MJ, Watson RE, Griffiths CE. The systemic influence of chronic smoking on skin structure and mechanical function. J Pathol 2020; 251:420-428. [PMID: 32472631 DOI: 10.1002/path.5476] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/15/2020] [Accepted: 05/20/2020] [Indexed: 12/21/2022]
Abstract
One of the major functions of human skin is to provide protection from the environment. Although we cannot entirely avoid, for example, sun exposure, it is likely that exposure to other environmental factors could affect cutaneous function. A number of studies have identified smoking as one such factor that leads to both facial wrinkle formation and a decline in skin function. In addition to the direct physical effects of tobacco smoke on skin, its inhalation has additional profound systemic effects for the smoker. The adverse effects on the respiratory and cardiovascular systems from smoking are well known. Central to the pathological changes associated with smoking is the elastic fibre, a key component of the extracellular matrices of lungs. In this study we examined the systemic effect of chronic smoking (>40 cigarettes/day; >5 years) on the histology of the cutaneous elastic fibre system, the nanostructure and mechanics of one of its key components, the fibrillin-rich microfibril, and the micromechanical stiffness of the dermis and epidermis. We show that photoprotected skin of chronic smokers exhibits significant remodelling of the elastic fibre network (both elastin and fibrillin-rich microfibrils) as compared to the skin of age- and sex-matched non-smokers. This remodelling is not associated with increased gelatinase activity (as identified by in situ zymography). Histological remodelling is accompanied by significant ultrastructural changes to extracted fibrillin-rich microfibrils. Finally, using scanning acoustic microscopy, we demonstrated that chronic smoking significantly increases the stiffness of both the dermis and the epidermis. Taken together, these data suggest an unappreciated systemic effect of chronic inhalation of tobacco smoke on the cutaneous elastic fibre network. Such changes may in part underlie the skin wrinkling and loss of skin elasticity associated with smoking. © 2020 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Abigail K Langton
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Evridiki Tsoureli-Nikita
- First Department of Dermatology, Andreas Syggros Hospital of Cutaneous & Venereal Diseases, Athens University Medical School, Athens, Greece
| | - Holly Merrick
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Xuegen Zhao
- School of Materials, The University of Manchester, Manchester, UK
| | - Christina Antoniou
- First Department of Dermatology, Andreas Syggros Hospital of Cutaneous & Venereal Diseases, Athens University Medical School, Athens, Greece
| | - Alexander Stratigos
- First Department of Dermatology, Andreas Syggros Hospital of Cutaneous & Venereal Diseases, Athens University Medical School, Athens, Greece
| | - Riaz Akhtar
- Department of Mechanical, Materials and Aerospace Engineering, School of Engineering, University of Liverpool, Liverpool, UK
| | - Brian Derby
- School of Materials, The University of Manchester, Manchester, UK
| | - Michael J Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Rachel Eb Watson
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Christopher Em Griffiths
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
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14
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Langton AK, Hann M, Costello P, Halai P, Sisto Alessi César S, Lien-Lun Chien A, Kang S, Griffiths CEM, Sherratt MJ, Watson REB. Heterogeneity of fibrillin-rich microfibrils extracted from human skin of diverse ethnicity. J Anat 2020; 237:478-486. [PMID: 32452018 DOI: 10.1111/joa.13217] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 04/22/2020] [Accepted: 04/22/2020] [Indexed: 12/22/2022] Open
Abstract
The dermal elastic fibre network is the primary effector of skin elasticity, enabling it to extend and recoil many times over the lifetime of the individual. Fibrillin-rich microfibrils (FRMs) constitute integral components of the elastic fibre network, with their distribution showing differential deposition in the papillary dermis across individuals of diverse skin ethnicity. Despite these differential findings in histological presentation, it is not known if skin ethnicity influences FRM ultrastructure. FRMs are evolutionarily highly conserved from jellyfish to man and, regardless of tissue type or species, isolated FRMs have a characteristic 'beads-on-a-string' ultrastructural appearance, with an average inter-bead distance (or periodicity) of 56 nm. Here, skin biopsies were obtained from the photoprotected buttock of healthy volunteers (18-27 years; African: n = 5; European: n = 5), and FRMs were isolated from the superficial papillary dermis and deeper reticular dermis and imaged by atomic force microscopy. In the reticular dermis, there was no significant difference in FRM ultrastructure between European and African participants. In contrast, in the more superficial papillary dermis, inter-bead periodicity was significantly larger for FRMs extracted from European participants than from African participants by 2.20 nm (p < .001). We next assessed whether these differences in FRM ultrastructure were present during early postnatal development by characterizing FRMs from full-thickness neonatal foreskin. Analysis of FRM periodicity identified no significant difference between neonatal cohorts (p = .865). These data suggest that at birth, FRMs are developmentally invariant. However, in adults of diverse skin ethnicity, there is a deviation in ultrastructure for the papillary dermal FRMs that may be acquired during the passage of time from child to adulthood. Understanding the mechanism by which this difference in papillary dermal FRMs arises warrants further study.
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Affiliation(s)
- Abigail K Langton
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Mark Hann
- Centre for Biostatistics, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Patrick Costello
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Poonam Halai
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | | | - Anna Lien-Lun Chien
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sewon Kang
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christopher E M Griffiths
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Michael J Sherratt
- Division of Cell Matrix Biology and Regenerative Medicine, The University of Manchester, Manchester, UK
| | - Rachel E B Watson
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
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15
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Eckersley A, Ozols M, O'Cualain R, Keevill EJ, Foster A, Pilkington S, Knight D, Griffiths CEM, Watson REB, Sherratt MJ. Proteomic fingerprints of damage in extracellular matrix assemblies. Matrix Biol Plus 2020; 5:100027. [PMID: 33543016 PMCID: PMC7852314 DOI: 10.1016/j.mbplus.2020.100027] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 01/21/2020] [Accepted: 01/21/2020] [Indexed: 12/11/2022] Open
Abstract
In contrast to the dynamic intracellular environment, structural extracellular matrix (ECM) proteins with half-lives measured in decades, are susceptible to accumulating damage. Whilst conventional approaches such as histology, immunohistochemistry and mass spectrometry are able to identify age- and disease-related changes in protein abundance or distribution, these techniques are poorly suited to characterising molecular damage. We have previously shown that mass spectrometry can detect tissue-specific differences in the proteolytic susceptibility of protein regions within fibrillin-1 and collagen VI alpha-3. Here, we present a novel proteomic approach to detect damage-induced “peptide fingerprints” within complex multi-component ECM assemblies (fibrillin and collagen VI microfibrils) following their exposure to ultraviolet radiation (UVR) by broadband UVB or solar simulated radiation (SSR). These assemblies were chosen because, in chronically photoaged skin, fibrillin and collagen VI microfibril architectures are differentially susceptible to UVR. In this study, atomic force microscopy revealed that fibrillin microfibril ultrastructure was significantly altered by UVR exposure whereas the ultrastructure of collagen VI microfibrils was resistant. UVR-induced molecular damage was further characterised by proteolytic peptide generation with elastase followed by liquid chromatography tandem mass spectrometry (LC-MS/MS). Peptide mapping revealed that UVR exposure increased regional proteolytic susceptibility within the protein structures of fibrillin-1 and collagen VI alpha-3. This allowed the identification of UVR-induced molecular changes within these two key ECM assemblies. Additionally, similar changes were observed within protein regions of co-purifying, microfibril-associated receptors integrins αv and β1. This study demonstrates that LC-MS/MS mapping of peptides enables the characterisation of molecular post-translational damage (via direct irradiation and radiation-induced oxidative mechanisms) within a complex in vitro model system. This peptide fingerprinting approach reliably allows both the identification of UVR-induced molecular damage in and between proteins and the identification of specific protein domains with increased proteolytic susceptibility as a result of photo-denaturation. This has the potential to serve as a sensitive method of identifying accumulated molecular damage in vivo using conventional mass spectrometry data-sets. Mass spectrometry “peptide fingerprinting” can detect post-translational damage within extracellular matrix proteins. UVR-induced FBN1 and COL6A3 peptide fingerprints are reproducibly identified from purified microfibrils. Peptide mapping reveals increased regional susceptibilities to proteolysis in FBN1 and COL6A3 proteins. Regional changes are also observed in protein structures of microfibril-associated receptor integrins αv and β1. This “peptide fingerprinting” approach is applicable to conventional LC-MS/MS datasets.
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Key Words
- AFM, atomic force microscopy
- COL6A3, collagen VI alpha 3 chain
- Collagen VI microfibril
- ECM, extracellular matrix
- EGF, epidermal growth factor domain
- Fibrillin microfibril
- HDF, human dermal fibroblast
- LC-MS/MS, liquid chromatography tandem mass spectrometry
- Mass spectrometry
- PSM, peptide spectrum match
- Photodamage
- ROS, reactive oxygen species
- SSR, solar simulated radiation
- TGFβ, transforming growth factor beta
- UVR, ultraviolet radiation
- Ultraviolet radiation
- vWA, von Willebrand factor type A domain
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Affiliation(s)
- Alexander Eckersley
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Matiss Ozols
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Ronan O'Cualain
- Biological Mass Spectrometry Core Research Facility, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Emma-Jayne Keevill
- Biological Mass Spectrometry Core Research Facility, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - April Foster
- Division of Musculoskeletal & Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Suzanne Pilkington
- Division of Musculoskeletal & Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - David Knight
- Biological Mass Spectrometry Core Research Facility, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Christopher E M Griffiths
- Division of Musculoskeletal & Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Rachel E B Watson
- Division of Musculoskeletal & Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK.,NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Michael J Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
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16
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Langton AK, Hann M, Costello P, Halai P, Griffiths CEM, Sherratt MJ, Watson REB. Remodelling of fibrillin-rich microfibrils by solar-simulated radiation: impact of skin ethnicity. Photochem Photobiol Sci 2020; 19:1160-1167. [DOI: 10.1039/d0pp00188k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cutaneous fibrillin-rich microfibrils (FRMs) should be considered as two distinct populations that differentially accrue damage in response to SSR. Furthermore, FRMs derived from black African skin show greater change following UVR challenge.
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Affiliation(s)
- Abigail K. Langton
- Centre for Dermatology Research
- The University of Manchester & Salford Royal NHS Foundation Trust
- Manchester Academic Health Science Centre
- UK
- NIHR Manchester Biomedical Research Centre
| | - Mark Hann
- Centre for Biostatistics
- The University of Manchester
- Manchester Academic Health Science Centre
- UK
| | - Patrick Costello
- Centre for Dermatology Research
- The University of Manchester & Salford Royal NHS Foundation Trust
- Manchester Academic Health Science Centre
- UK
| | - Poonam Halai
- Centre for Dermatology Research
- The University of Manchester & Salford Royal NHS Foundation Trust
- Manchester Academic Health Science Centre
- UK
| | - Christopher E. M. Griffiths
- Centre for Dermatology Research
- The University of Manchester & Salford Royal NHS Foundation Trust
- Manchester Academic Health Science Centre
- UK
- NIHR Manchester Biomedical Research Centre
| | - Michael J. Sherratt
- Division of Cell Matrix Biology and Regenerative Medicine
- The University of Manchester
- UK
| | - Rachel E. B. Watson
- Centre for Dermatology Research
- The University of Manchester & Salford Royal NHS Foundation Trust
- Manchester Academic Health Science Centre
- UK
- NIHR Manchester Biomedical Research Centre
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17
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Bertolini M, Ramot Y, Gherardini J, Heinen G, Chéret J, Welss T, Giesen M, Funk W, Paus R. Theophylline exerts complex anti-ageing and anti-cytotoxicity effects in human skin ex vivo. Int J Cosmet Sci 2019; 42:79-88. [PMID: 31633195 DOI: 10.1111/ics.12589] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 10/17/2019] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Theophylline is a phosphodiesterase inhibitor that is being used clinically for asthma therapy. In addition, it is recognized as a cosmetic agent with possible anti-ageing and anti-oxidative properties. Nevertheless, how it affects human skin is still poorly examined. METHODS Theophylline (10 or 100 µM) was administered to the culture medium of full-thickness human skin ex vivo for 24 or 72 h. RESULTS Theophylline stimulated protein expression of the anti-oxidant metallothionein-1 and mRNA levels of collagen I and III. Assessment of fibrillin-1 immunohistology revealed enhanced structural stability of dermal microfibrils. Theophylline also exerted extracellular matrix-protective effects by decreasing MMP-2 and MMP-9 mRNA levels, partially antagonizing the effects of menadione, the potent, toxic ROS donor. In addition, it decreased menadione-stimulated epidermal keratinocytes apoptosis. Interestingly, theophylline also increased the level of intracutaneously produced melatonin, that is the most potent ROS-protective and DNA damage repair neuromediator, and tendentially increased protein expression of MT1, the melatonin receptor. Theophylline also increased the expression of keratin 15, the stem cell marker, in the epidermal basal layer but did not change mitochondrial activity or epidermal pigmentation. CONCLUSION This ex vivo pilot study in human skin shows that theophylline possesses several interesting complex skin-protective properties. It encourages further examination of theophylline as a topical candidate for anti-ageing treatment.
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Affiliation(s)
- M Bertolini
- Monasterium Laboratory GmbH, 48149 , Muenster, Germany
| | - Y Ramot
- Department of Dermatology, The Faculty of Medicine, Hadassah Medical Center, Hebrew University of Jerusalem, 9112001 , Jerusalem, Israel
| | - J Gherardini
- Monasterium Laboratory GmbH, 48149 , Muenster, Germany
| | - G Heinen
- Henkel AG & Co. KGaA, 40589 , Düsseldorf, Germany
| | - J Chéret
- Monasterium Laboratory GmbH, 48149 , Muenster, Germany.,Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, 33136 , Miami, FL, USA
| | - T Welss
- Henkel AG & Co. KGaA, 40589 , Düsseldorf, Germany
| | - M Giesen
- Henkel AG & Co. KGaA, 40589 , Düsseldorf, Germany
| | - W Funk
- Clinic for Plastic, Aesthetic and Reconstructive Surgery, Dr. Dr. med. Funk, 81739, Munich, Germany
| | - R Paus
- Monasterium Laboratory GmbH, 48149 , Muenster, Germany.,Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, 33136 , Miami, FL, USA.,Centre for Dermatology Research, University of Manchester, M13 9PL, Manchester, UK
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18
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Torzilli PA, Azimulla A. Ultraviolet light (365 nm) transmission properties of articular cartilage as a function of depth, extracellular matrix, and swelling. J Biomed Mater Res A 2019; 108:327-339. [PMID: 31622534 DOI: 10.1002/jbm.a.36819] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/22/2019] [Accepted: 09/10/2019] [Indexed: 11/06/2022]
Abstract
Current tissue engineering approaches for treatment of injured or diseased articular cartilage use ultraviolet light (UV) for in situ photopolymerization of biomaterials to fill chondral and osteochondral defects as well as resurfacing, stiffening and bonding the extracellular matrix and tissue interfaces. The most commonly used UV light wavelength is UVA 365 nm, the least cytotoxic and deepest penetrating. However, little information is available on the transmission of UVA 365 nm light through the cartilage matrix. In the present study, 365 nm UV light transmission was measured as a function of depth through 100 μm thick slices of healthy articular cartilage removed from mature bovine knees. Transmission properties were measured in normal (Native) cartilage and after swelling equilibration in phosphate-buffered saline (Swollen). Single-factor and multiple linear regression analyses were performed to determine depth-dependencies between the effective attenuation coefficients and proteoglycan, collagen and water contents. For both cartilages, a significant depth-dependency was found for the effective attenuation coefficients, being highest at the articular surface (superficial zone) and decreasing with depth. The effective attenuation coefficients for full-thickness cartilages were approximately a third lower than the total attenuation coefficients calculated from the individual slices. Analysis of absorption and scattering effects due to the ECM and chondrocytes found that UV light scatter coefficients were ∼10 times greater than absorption coefficients. The greater transmittance of UV light through the thicker cartilage was attributed to the collagen within the ECM causing significant backscatter forward reflectance.
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Affiliation(s)
- Peter A Torzilli
- Orthopaedic Soft Tissue Research Program, Hospital for Special Surgery, New York, New York.,Physiology, Biophysics and System Biology Program,Weill Medical College of Cornell University, New York, New York.,Department of Biomedical Engineering, City College of New York, New York, New York
| | - Abidally Azimulla
- Department of Biomedical Engineering, City College of New York, New York, New York
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19
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Alafiatayo AA, Lai KS, Ahmad S, Mahmood M, Shaharuddin NA. RNA-Seq analysis revealed genes associated with UV-induced cell necrosis through MAPK/TNF-α pathways in human dermal fibroblast cells as an inducer of premature photoaging. Genomics 2019; 112:484-493. [PMID: 30946891 DOI: 10.1016/j.ygeno.2019.03.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 03/01/2019] [Accepted: 03/24/2019] [Indexed: 01/13/2023]
Abstract
Exposing the skin to solar UV radiation induces cascades of signaling pathways and biological alterations such as redox imbalance, suppression of antioxidant genes and programmed cell death. Therefore, the aim of this study was to use RNA-Seq to unravel the effects of UV radiation on Normal Human Adult Fibroblast cells (NHDF). Cells were exposed to UV (20 mJ/cm2 for 3 mins) and incubated for 24 h. Total mRNA from the cells generated libraries of 72,080,648 and 40,750,939 raw reads from UV-treated and control cells respectively. Of the differentially expressed genes (DEGs) produced 2,007 were up-regulated and 2,791 were down-regulated (fold change ≥2, p < 0.05). The expression of 4 genes was validated with RT-qPCR. Chemokine signaling pathways in cancer were significantly activated and antioxidant genes were down-regulated. This study applied Next Generation Sequencing technology to reveal the genes and pathways involved in UV-induced human dermal fibroblast cells necrosis.
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Affiliation(s)
- Akinola Adekoya Alafiatayo
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400, UPM, Serdang, Selangor, Malaysia; Department of Sciences, College of Science & Technology, Waziri Umaru Federal Polytechnic, Birnin Kebbi, Nigeria
| | - Kok-Song Lai
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400, UPM, Serdang, Selangor, Malaysia
| | - Syahida Ahmad
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400, UPM, Serdang, Selangor, Malaysia
| | - Maziah Mahmood
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400, UPM, Serdang, Selangor, Malaysia
| | - Noor Azmi Shaharuddin
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400, UPM, Serdang, Selangor, Malaysia; Institute of Plantation Studies, Universiti Putra Malaysia, 43400, UPM, Serdang, Selangor, Malaysia.
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20
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Hibbert SA, Watson REB, Griffiths CEM, Gibbs NK, Sherratt MJ. Selective proteolysis by matrix metalloproteinases of photo-oxidised dermal extracellular matrix proteins. Cell Signal 2018; 54:191-199. [PMID: 30521860 DOI: 10.1016/j.cellsig.2018.11.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 11/30/2018] [Accepted: 11/30/2018] [Indexed: 10/27/2022]
Abstract
Photodamage in chronically sun-exposed skin manifests clinically as deep wrinkles and histologically as extensive remodelling of the dermal extracellular matrix (ECM) and in particular, the elastic fibre system. We have shown previously that loss of fibrillin microfibrils, a key elastic fibre component, is a hallmark of early photodamage and that these ECM assemblies are susceptible in vitro to physiologically attainable doses of ultraviolet radiation (UVR). Here, we test the hypotheses that UVR-mediated photo-oxidation is the primary driver of fibrillin microfibril and fibronectin degradation and that prior UVR exposure will enhance the subsequent proteolytic activity of UVR-upregulated matrix metalloproteinases (MMPs). We confirmed that UVB (280-315 nm) irradiation in vitro induced structural changes to both fibrillin microfibrils and fibronectin and these changes were largely reactive oxygen species (ROS)-driven, with increased ROS lifetime (D2O) enhancing protein damage and depleted O2 conditions abrogating it. Furthermore, we show that although exposure to UVR alone increased microfibril structural heterogeneity, exposure to purified MMPs (1, -3, -7 and - 9) alone had minimal effect on microfibril bead-to-bead periodicity; however, microfibril suspensions exposed to UVR and then MMPs were more structurally homogenous. In contrast, the susceptibly of fibronectin to proteases was unaffected by prior UVR exposure. These observations suggest that both direct photon absorption and indirect production of ROS are important mediators of ECM remodelling in photodamage. We also show that fibrillin microfibrils are relatively resistant to proteolysis by MMPs -1, -3, -7 and - 9 but that these MMPs may selectively remove damaged microfibril assemblies. These latter observations have implications for predicting the mechanisms of tissue remodelling and targeted repair.
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Affiliation(s)
- Sarah A Hibbert
- Division of Cell Matrix Biology & Regenerative Medicine, The University of Manchester, Manchester, UK.
| | - Rachel E B Watson
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK; NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, UK
| | - Christopher E M Griffiths
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK; NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, UK
| | - Neil K Gibbs
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Michael J Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine, The University of Manchester, Manchester, UK.
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21
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FRT-Fondation Rene Touraine: An International Foundation For Dermatology. Exp Dermatol 2018; 27:1179-1189. [PMID: 30260535 DOI: 10.1111/exd.13732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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22
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Keratinocyte stem cells are more resistant to UVA radiation than their direct progeny. PLoS One 2018; 13:e0203863. [PMID: 30208100 PMCID: PMC6135485 DOI: 10.1371/journal.pone.0203863] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Accepted: 08/29/2018] [Indexed: 12/16/2022] Open
Abstract
The epidermis undergoes constant renewal during its lifetime. This is possible due to a special population of keratinocyte stem cells (KSCs) located at the basal layer. These cells are surrounded by their direct progeny, keratinocyte progenitors or transient amplifying cells (TAs), which arise from cell division. Skin is exposed every day to sun radiation; in particular, UVA radiation penetrates through the epidermis and induces damage to KSCs and TAs. Although keratinocytes in the basal layer are the most likely skin carcinomas and/or photoaging cells of origin, surprisingly few studies have addressed the specific responses of these cells to UV radiation. In this study, we showed for the first time that keratinocyte stem cells were more resistant to UVA irradiation than their direct progeny, transient amplifying cells. Using both the MTT assay and clonogenic assay, we found that KSCs were more photo-resistant compared to TAs after exposure to different doses of UVA (from 0 to 50 J/cm2). Moreover, KSCs had a greater ability to reconstruct human epidermis (RHE) after UVA exposure compared with TAs. Finally, investigations of DNA repair using the comet assay showed that DNA single-strand breaks and thymine dimers were repaired quicker and more efficiently in KSCs compared with TAs. In a previous work, we showed that the same stem cell population was more resistant to ionizing radiation, another carcinogenic agent. Collectively, our results combined with other observations demonstrate that keratinocyte stem cells, which are responsible for epidermal renewal throughout life, are equipped with an efficient arsenal against several genotoxic agents. Our future work will try to identify the factors or signaling pathways that are responsible for this differential photo-sensitivity and DNA repair capacity between KSCs and TAs.
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23
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Godwin ARF, Starborg T, Smith DJ, Sherratt MJ, Roseman AM, Baldock C. Multiscale Imaging Reveals the Hierarchical Organization of Fibrillin Microfibrils. J Mol Biol 2018; 430:4142-4155. [PMID: 30120953 PMCID: PMC6193142 DOI: 10.1016/j.jmb.2018.08.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/10/2018] [Accepted: 08/12/2018] [Indexed: 01/17/2023]
Abstract
Fibrillin microfibrils are evolutionarily ancient, structurally complex extracellular polymers found in mammalian elastic tissues where they endow elastic properties, sequester growth factors and mediate cell signalling; thus, knowledge of their structure and organization is essential for a more complete understanding of cell function and tissue morphogenesis. By combining multiple imaging techniques, we visualize three levels of hierarchical organization of fibrillin structure ranging from micro-scale fiber bundles in the ciliary zonule to nano-scale individual microfibrils. Serial block-face scanning electron microscopy imaging suggests that bundles of zonule fibers are bound together by circumferential wrapping fibers, which is mirrored on a shorter-length scale where individual zonule fibers are interwoven by smaller fibers. Electron tomography shows that microfibril directionality varies from highly aligned and parallel, connecting to the basement membrane, to a meshwork at the zonule fiber periphery, and microfibrils within the zonule are connected by short cross-bridges, potentially formed by fibrillin-binding proteins. Three-dimensional reconstructions of negative-stain electron microscopy images of purified microfibrils confirm that fibrillin microfibrils have hollow tubular structures with defined bead and interbead regions, similar to tissue microfibrils imaged in our tomograms. These microfibrils are highly symmetrical, with an outer ring and interwoven core in the bead and four linear prongs, each accommodating a fibrillin dimer, in the interbead region. Together these data show how a single molecular building block is organized into different levels of hierarchy from microfibrils to tissue structures spanning nano- to macro-length scales. Furthermore, the application of these combined imaging approaches has wide applicability to other tissue systems. Extracellular matrix fibrillin microfibrils assemble to form ocular ligaments. Individual beaded fibrillin microfibrils are highly symmetric biological polymers. Zonule fibers are composed of aligned, organized arrays of fibrillin microfibrils. Bundles of zonule fibers are wrapped by large fibers providing structural support. Fibrillin organization shows how a single building block constructs an elastic tissue.
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Affiliation(s)
- Alan R F Godwin
- Wellcome Centre for Cell-Matrix Research, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK; Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK
| | - Tobias Starborg
- Wellcome Centre for Cell-Matrix Research, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK
| | - David J Smith
- Wellcome Centre for Cell-Matrix Research, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK
| | - Michael J Sherratt
- Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK
| | - Alan M Roseman
- Division of Molecular and Cellular Function, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK
| | - Clair Baldock
- Wellcome Centre for Cell-Matrix Research, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK; Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK.
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24
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Fibrillin microfibrils and elastic fibre proteins: Functional interactions and extracellular regulation of growth factors. Semin Cell Dev Biol 2018; 89:109-117. [PMID: 30016650 PMCID: PMC6461133 DOI: 10.1016/j.semcdb.2018.07.016] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 07/04/2018] [Accepted: 07/13/2018] [Indexed: 02/02/2023]
Abstract
Fibrillin microfibrils are extensible polymers that endow connective tissues with long-range elasticity and have widespread distributions in both elastic and non-elastic tissues. They act as a template for elastin deposition during elastic fibre formation and are essential for maintaining the integrity of tissues such as blood vessels, lung, skin and ocular ligaments. A reduction in fibrillin is seen in tissues in vascular ageing, chronic obstructive pulmonary disease, skin ageing and UV induced skin damage, and age-related vision deterioration. Most mutations in fibrillin cause Marfan syndrome, a genetic disease characterised by overgrowth of the long bones and other skeletal abnormalities with cardiovascular and eye defects. However, mutations in fibrillin and fibrillin-binding proteins can also cause short-stature pathologies. All of these diseases have been linked to dysregulated growth factor signalling which forms a major functional role for fibrillin.
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25
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Charoenchon N, Rhodes LE, Pilkington SM, Farrar MD, Watson REB. Differential reorganisation of cutaneous elastic fibres: a comparison of the in vivo effects of broadband ultraviolet B versus solar simulated radiation. Photochem Photobiol Sci 2018; 17:889-895. [PMID: 29697102 PMCID: PMC6044188 DOI: 10.1039/c7pp00412e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 04/11/2018] [Indexed: 01/12/2023]
Abstract
Long-term exposure of human skin to ultraviolet radiation (UVR) in sunlight negatively impacts its appearance and function with photoaged skin having a characteristic leathery, rough appearance, with deep wrinkles. These clinical features of photodamage are thought to result from UVR-induced remodelling of the dermal extracellular matrix, particularly the elastic fibre system. There are few in vivo human data on the impact of acute UVR exposure on this fibre system and particularly solar-simulated radiation (SSR)-mediated effects. We examined the differential effect of broadband UVB and SSR on the human dermal elastic fibre system, and specifically the microfibrillar components fibrillin-1, fibulin-2 and fibulin-5. Healthy white Caucasian adults (skin type II-III) were recruited and irradiated with 3× their minimal erythema dose of broadband UVB (n = 6) or SSR (n = 6) on photoprotected buttock skin. Punch biopsies were taken 24 h after irradiation and from unirradiated control skin. Overall, histological assessment of elastic fibres revealed significantly less elastic fibre staining in broadband UVB (P = 0.004) or SSR (P = 0.04) irradiated skin compared to unirradiated control skin. Significantly less staining of fibrillin-1-positive microfibrils was also observed in the papillary dermis of UVB irradiated skin (P = 0.02) but not skin exposed to SSR. Conversely, immunohistochemistry for fibulin-5-positive microfibrils revealed significantly less expression in skin exposed to SSR (P = 0.04) but not to broadband UVB. There was no significant change in fibulin-2-positive microfibrils following either broadband UVB or SSR irradiation. Thus, broadband UVB and SSR mediate differential effects on individual components of the dermal elastic fibre network in human skin. Further human studies are required to explore the mechanisms underlying these findings and the impact of potential photoprotective agents.
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Affiliation(s)
- Nisamanee Charoenchon
- Centre for Dermatology Research
, Division of Musculoskeletal and Dermatological Sciences
, School of Biological Sciences
, Faculty of Biology
, Medicine and Health
, Manchester Academic Health Science Centre
, The University of Manchester M13 9PT and The Dermatology Centre
, Salford Royal NHS Foundation Trust
,
Salford M6 8HD
, UK
.
; Tel: +44 (0)161 275 5505
| | - Lesley E. Rhodes
- Centre for Dermatology Research
, Division of Musculoskeletal and Dermatological Sciences
, School of Biological Sciences
, Faculty of Biology
, Medicine and Health
, Manchester Academic Health Science Centre
, The University of Manchester M13 9PT and The Dermatology Centre
, Salford Royal NHS Foundation Trust
,
Salford M6 8HD
, UK
.
; Tel: +44 (0)161 275 5505
| | - Suzanne M. Pilkington
- Centre for Dermatology Research
, Division of Musculoskeletal and Dermatological Sciences
, School of Biological Sciences
, Faculty of Biology
, Medicine and Health
, Manchester Academic Health Science Centre
, The University of Manchester M13 9PT and The Dermatology Centre
, Salford Royal NHS Foundation Trust
,
Salford M6 8HD
, UK
.
; Tel: +44 (0)161 275 5505
| | - Mark D. Farrar
- Centre for Dermatology Research
, Division of Musculoskeletal and Dermatological Sciences
, School of Biological Sciences
, Faculty of Biology
, Medicine and Health
, Manchester Academic Health Science Centre
, The University of Manchester M13 9PT and The Dermatology Centre
, Salford Royal NHS Foundation Trust
,
Salford M6 8HD
, UK
.
; Tel: +44 (0)161 275 5505
| | - Rachel E. B. Watson
- Centre for Dermatology Research
, Division of Musculoskeletal and Dermatological Sciences
, School of Biological Sciences
, Faculty of Biology
, Medicine and Health
, Manchester Academic Health Science Centre
, The University of Manchester M13 9PT and The Dermatology Centre
, Salford Royal NHS Foundation Trust
,
Salford M6 8HD
, UK
.
; Tel: +44 (0)161 275 5505
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Eckersley A, Mellody KT, Pilkington S, Griffiths CEM, Watson REB, O'Cualain R, Baldock C, Knight D, Sherratt MJ. Structural and compositional diversity of fibrillin microfibrils in human tissues. J Biol Chem 2018; 293:5117-5133. [PMID: 29453284 PMCID: PMC5892578 DOI: 10.1074/jbc.ra117.001483] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/07/2018] [Indexed: 12/11/2022] Open
Abstract
Elastic fibers comprising fibrillin microfibrils and elastin are present in many tissues, including the skin, lungs, and arteries, where they confer elasticity and resilience. Although fibrillin microfibrils play distinct and tissue-specific functional roles, it is unclear whether their ultrastructure and composition differ between elastin-rich (skin) and elastin-poor (ciliary body and zonule) organs or after in vitro synthesis by cultured cells. Here, we used atomic force microscopy, which revealed that the bead morphology of fibrillin microfibrils isolated from the human eye differs from those isolated from the skin. Using newly developed pre-MS preparation methods and LC-MS/MS, we detected tissue-specific regions of the fibrillin-1 primary structure that were differentially susceptible to proteolytic extraction. Comparing tissue- and culture-derived microfibrils, we found that dermis- and dermal fibroblast–derived fibrillin microfibrils differ in both bead morphology and periodicity and also exhibit regional differences in fibrillin-1 proteolytic susceptibility. In contrast, collagen VI microfibrils from the same dermal or fibroblast samples were invariant in ultrastructure (periodicity) and protease susceptibility. Finally, we observed that skin- and eye-derived microfibril suspensions were enriched in elastic fiber– and basement membrane–associated proteins, respectively. LC-MS/MS also identified proteins (such as calreticulin and protein-disulfide isomerase) that are potentially fundamental to fibrillin microfibril biology, regardless of their tissue source. Fibrillin microfibrils synthesized in cell culture lacked some of these key proteins (MFAP2 and -4 and fibrillin-2). These results showcase the structural diversity of these key extracellular matrix assemblies, which may relate to their distinct roles in the tissues where they reside.
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Affiliation(s)
| | - Kieran T Mellody
- From the Division of Cell Matrix Biology and Regenerative Medicine
| | | | - Christopher E M Griffiths
- the Division of Musculoskeletal and Dermatological Sciences.,the NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Rachel E B Watson
- the Division of Musculoskeletal and Dermatological Sciences.,the NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | | | - Clair Baldock
- From the Division of Cell Matrix Biology and Regenerative Medicine.,the Wellcome Trust Centre for Cell-Matrix Research, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, United Kingdom and
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Hibbert SA, Costello P, O'Connor C, Bell M, Griffiths CEM, Watson REB, Sherratt MJ. A new in vitro assay to test UVR protection of dermal extracellular matrix components by a flat spectrum sunscreen. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 175:58-64. [PMID: 28846936 DOI: 10.1016/j.jphotobiol.2017.08.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 07/10/2017] [Accepted: 08/14/2017] [Indexed: 01/08/2023]
Abstract
The efficacy of topical sunscreens is currently assessed by crude, costly and time consuming in vivo assays. We have previously demonstrated that components of the dermal extracellular matrix (ECM), rich in UV-absorbing amino acids, are susceptible to damage by solar simulated radiation (SSR) in vitro. Here we developed an in vitro method to test the ability of sunscreens to protect fibrillin-rich microfibrils (FRM) and fibronectin, key components of the dermal ECM from UV-induced damage. Solutions of FRM or fibronectin were irradiated without protection, in the presence of a vehicle or a commercially-available flat-spectrum sunscreen. The effect of SSR on molecular structure was determined by atomic force microscopy (FRM) and SDS-PAGE (fibronectin). Following irradiation, FRM periodicity became bi-modally distributed (peaks: 40nm & 59nm) compared to the unimodal distribution in unexposed controls (peak: 50nm). Irradiation in the presence of flat-spectrum sunscreen protected against this change, maintaining the unimodal distribution. SSR induced significant aggregation of fibronectin (p=0.005), which was abrogated by sunscreen. These results demonstrate that this in vitro assay system is sufficiently sensitive to act as an initial/additional screen of sunscreen efficacy. We conclude that sunscreen can reduce UV-mediated damage of key dermal ECM in vitro and thereby prevent remodelling associated with photoageing.
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Affiliation(s)
- S A Hibbert
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - P Costello
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK; NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, UK; Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - C O'Connor
- Walgreens Boots Alliance, Thane Road, Nottingham, UK
| | - M Bell
- Walgreens Boots Alliance, Thane Road, Nottingham, UK
| | - C E M Griffiths
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK; NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, UK; Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - R E B Watson
- Centre for Dermatology Research, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK; NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, UK; Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.
| | - M J Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
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Shiroto Y, Terashima S, Hosokawa Y, Oka K, Isokawa K, Tsuruga E. The Effect of Ultraviolet B on Fibrillin-1 and Fibrillin-2 in Human Non-pigmented Ciliary Epithelial Cells In Vitro. Acta Histochem Cytochem 2017; 50:105-109. [PMID: 28744027 PMCID: PMC5519489 DOI: 10.1267/ahc.16036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 05/09/2017] [Indexed: 11/27/2022] Open
Abstract
The ciliary zonules link the lens to the ciliary body in the eye, controlling the thickness of the lens for focusing through their characteristic elasticity. The ciliary zonules are composed of oxytalan fibers. Physiological or pathological damage to the ciliary zonules, including exposure to ultraviolet (UV)-A and UV-B components, can lead to lens dislocation. However, no studies have shown whether UV affects the ciliary zonule. Here, we assessed the effects of UV light on human nonpigmented ciliary epithelial cells (HNPCECs). HNPCECs were cultured for 4 weeks, and expression of fibrillin-1 and fibrillin-2 was confirmed. In control cultures (0 mJ/cm2), some fibrillin-1-positive fibers were merged with fibrillin-2. After UV-A irradiation, the appearance of both fibrillin-1- and fibrillin-2-positive fibers was unchanged. However, after UV-B irradiation, fibrillin-1-positive fibers became thin at an irradiation level of 100 mJ/cm2, and the fiber structure became amorphous at 150 mJ/cm2. Fibrillin-2-positive fibers lost their continuity and disappeared after being exposed to 150 mJ/cm2 UV-B. UV-B irradiation did not affect cell viability, possibly because of the sensitivity of fibrillin-1 and fibrillin-2 to UV-B. Thus, dislocation of the lens with age may be attributable to cumulative exposure to UV-B.
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Affiliation(s)
- Yuki Shiroto
- Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University
| | - Shingo Terashima
- Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University
| | - Yoichiro Hosokawa
- Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University
| | - Kyoko Oka
- Section of Pediatric Dentistry, Department of Oral Growth & Development, Division of Clinical Dentistry, Fukuoka Dental College
| | | | - Eichi Tsuruga
- Department of Radiation Science, Graduate School of Health Sciences, Hirosaki University
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Abstract
INTRODUCTION Gastric and oesophageal cancers are a pressing global health problem with high mortality rates and poor outcomes for advanced disease. The mainstay of treatment in the palliative setting has traditionally been chemotherapy, which accrues only modest survival benefits. As with other cancer types, there is increasing interest in the use of immunotherapy approaches to improve outcomes. AREAS COVERED This paper reviews the aetiological and genetic characteristics of oesophagogastric (OG) cancers relevant to the application of immunotherapy and outlines the historical, present-day and potential future applications of immunotherapy in their management. EXPERT OPINION The use of agents targeting the PD1 pathway have led to impressive and durable responses in a minority of OG cancer patients and it would be expected that combinatorial approaches with chemotherapy, radiotherapy and other biological agents will improve responses further. Identification of clinically robust biomarkers is crucial in refining such approaches moving forwards. The application of modern sequencing technology to the development of personalized neoantigen-based vaccines represents an exciting amalgamation of genomics and immunotherapy, with potentially important clinical implications in OG cancer.
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Affiliation(s)
- Michael Davidson
- a The Royal Marsden Hospital NHS Foundation Trust , Gastro-Intestinal Cancer Research Department , London , United Kingdom
| | - Ian Chau
- a The Royal Marsden Hospital NHS Foundation Trust , Gastro-Intestinal Cancer Research Department , London , United Kingdom
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30
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Vidali S, Chéret J, Giesen M, Haeger S, Alam M, Watson REB, Langton AK, Klinger M, Knuever J, Funk W, Kofler B, Paus R. Thyroid Hormones Enhance Mitochondrial Function in Human Epidermis. J Invest Dermatol 2016; 136:2003-2012. [PMID: 27349864 DOI: 10.1016/j.jid.2016.05.118] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/17/2016] [Accepted: 05/20/2016] [Indexed: 12/20/2022]
Abstract
Since it is unknown whether thyroid hormones (THs) regulate mitochondrial function in human epidermis, we treated organ-cultured human skin, or isolated cultured human epidermal keratinocytes, with triiodothyronine (100 pmol/L) or thyroxine (100 nmol/L). Both THs significantly increased protein expression of the mitochondrially encoded cytochrome C oxidase I (MTCO1), complex I activity, and the number of perinuclear mitochondria. Triiodothyronine also increased mitochondrial transcription factor A (TFAM) protein expression, and thyroxine stimulated complex II/IV activity. Increased mitochondrial function can correlate with increased reactive oxygen species production, DNA damage, and accelerated tissue aging. However, THs neither raised reactive oxygen species production or matrix metalloproteinase-1, -2 and -9 activity nor decreased sirtuin1 (Sirt1) immunoreactivity. Instead, triiodothyronine increased sirtuin-1, fibrillin-1, proliferator-activated receptor-gamma 1-alpha (PGC1α), collagen I and III transcription, and thyroxine decreased cyclin-dependent kinase inhibitor 2A (p16(ink4)) expression in organ-cultured human skin. Moreover, TH treatment increased intracutaneous fibrillin-rich microfibril and collagen III deposition and decreased mammalian target of rapamycin (mTORC1/2) expression ex vivo. This identifies THs as potent endocrine stimulators of mitochondrial function in human epidermis, which down-regulates rather than enhance the expression of skin aging-related biomarkers ex vivo. Therefore, topically applied THs deserve further exploration as candidate agents for treating skin conditions characterized by reduced mitochondrial function.
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Affiliation(s)
- Silvia Vidali
- Department of Dermatology, University of Luebeck, Luebeck, Germany; Research Program for Receptor Biochemistry and Tumor Metabolism, Laura Bassi Centre of Expertise-THERAPEP, Department of Pediatrics, Paracelsus Medical University, Salzburg, Austria
| | - Jérémy Chéret
- Department of Dermatology, University of Münster, Münster, Germany
| | - Melanie Giesen
- Henkel Beauty Care, Henkel AG and Co. KgaA, Düsseldorf, Germany
| | - Swantje Haeger
- Department of Dermatology, University of Luebeck, Luebeck, Germany
| | - Majid Alam
- Department of Dermatology, University of Münster, Münster, Germany
| | - Rachel E B Watson
- Center for Dermatology Research, University of Manchester, Manchester, UK
| | - Abigail K Langton
- Center for Dermatology Research, University of Manchester, Manchester, UK
| | | | - Jana Knuever
- Department of Dermatology, University of Luebeck, Luebeck, Germany
| | | | - Barbara Kofler
- Research Program for Receptor Biochemistry and Tumor Metabolism, Laura Bassi Centre of Expertise-THERAPEP, Department of Pediatrics, Paracelsus Medical University, Salzburg, Austria
| | - Ralf Paus
- Department of Dermatology, University of Münster, Münster, Germany; Center for Dermatology Research, University of Manchester, Manchester, UK.
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Ultraviolet Radiation-Induced Skin Aging: The Role of DNA Damage and Oxidative Stress in Epidermal Stem Cell Damage Mediated Skin Aging. Stem Cells Int 2016; 2016:7370642. [PMID: 27148370 PMCID: PMC4842382 DOI: 10.1155/2016/7370642] [Citation(s) in RCA: 182] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/14/2016] [Indexed: 12/11/2022] Open
Abstract
Skin is the largest human organ. Skin continually reconstructs itself to ensure its viability, integrity, and ability to provide protection for the body. Some areas of skin are continuously exposed to a variety of environmental stressors that can inflict direct and indirect damage to skin cell DNA. Skin homeostasis is maintained by mesenchymal stem cells in inner layer dermis and epidermal stem cells (ESCs) in the outer layer epidermis. Reduction of skin stem cell number and function has been linked to impaired skin homeostasis (e.g., skin premature aging and skin cancers). Skin stem cells, with self-renewal capability and multipotency, are frequently affected by environment. Ultraviolet radiation (UVR), a major cause of stem cell DNA damage, can contribute to depletion of stem cells (ESCs and mesenchymal stem cells) and damage of stem cell niche, eventually leading to photoinduced skin aging. In this review, we discuss the role of UV-induced DNA damage and oxidative stress in the skin stem cell aging in order to gain insights into the pathogenesis and develop a way to reduce photoaging of skin cells.
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Long-term primary culture of neurons taken from chick embryo brain: A model to study neural cell biology, synaptogenesis and its dynamic properties. J Neurosci Methods 2016; 263:123-33. [DOI: 10.1016/j.jneumeth.2016.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 01/27/2016] [Accepted: 02/04/2016] [Indexed: 11/20/2022]
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Murase D, Hachiya A, Kikuchi-Onoe M, Fullenkamp R, Ohuchi A, Kitahara T, Moriwaki S, Hase T, Takema Y. Cooperation of endothelin-1 signaling with melanosomes plays a role in developing and/or maintaining human skin hyperpigmentation. Biol Open 2015; 4:1213-21. [PMID: 26340945 PMCID: PMC4610214 DOI: 10.1242/bio.011973] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 07/30/2015] [Indexed: 12/11/2022] Open
Abstract
Skin hyperpigmentation is characterized by increased melanin synthesis and deposition that can cause significant psychosocial and psychological distress. Although several cytokine-receptor signaling cascades contribute to the formation of ultraviolet B-induced cutaneous hyperpigmentation, their possible involvement in other types of skin hyperpigmentation has never been clearly addressed. Since our continuous studies using skin specimens from more than 30 subjects with ethnic skin diversity emphasized a consistent augmentation in the expression of endothelin-1 (ET-1) and its receptor (Endothelin B receptor, ET-B) in hyperpigmented lesions, including senile lentigos (SLs), the precise function of ET-1 signaling was investigated in the present study. In line with previous studies, ET-1 significantly induced melanogenesis followed by increases in melanosome transport in melanocytes and in its transfer to keratinocytes while inhibition of ET-B function substantially depressed melanogenic ability in tissue-cultured SLs. Additionally, in agreement with a previous report that the formation of autophagosomes rather than melanosomes is stimulated according to starvation or defective melanosome production, ET-1 was found to remarkably augment the expression of components necessary for early melanosome formation, indicating its counteraction against autophagy-targeting melanosome degradation in melanocytes. Despite the lack of substantial impact of ET-1 on keratinocyte melanogenic functions, the expression of ET-1 was enhanced following melanosome uptake by keratinocytes. Taken together, our data suggest that ET-1 plays a substantial role in the development and/or maintenance of skin hyperpigmentation in reciprocal cooperation with increased melanosome incorporation.
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Affiliation(s)
- Daiki Murase
- Biological Science Laboratories, Kao Corporation, Haga, Tochigi 321-3497, Japan Biological Science Americas Laboratory, Kao Corporation, Cincinnati, OH 45214, USA
| | - Akira Hachiya
- Biological Science Laboratories, Kao Corporation, Haga, Tochigi 321-3497, Japan
| | - Mamiko Kikuchi-Onoe
- Biological Science Laboratories, Kao Corporation, Haga, Tochigi 321-3497, Japan
| | - Rachel Fullenkamp
- Biological Science Americas Laboratory, Kao Corporation, Cincinnati, OH 45214, USA
| | - Atsushi Ohuchi
- Biological Science Laboratories, Kao Corporation, Haga, Tochigi 321-3497, Japan
| | - Takashi Kitahara
- Biological Science Laboratories, Kao Corporation, Haga, Tochigi 321-3497, Japan
| | - Shigeru Moriwaki
- Biological Science Laboratories, Kao Corporation, Haga, Tochigi 321-3497, Japan
| | - Tadashi Hase
- Biological Science Laboratories, Kao Corporation, Haga, Tochigi 321-3497, Japan
| | - Yoshinori Takema
- Research and Development Global, Kao Corporation, Sumida-ku, Tokyo 131-8501, Japan
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A potential role for endogenous proteins as sacrificial sunscreens and antioxidants in human tissues. Redox Biol 2015; 5:101-113. [PMID: 25911998 PMCID: PMC4412910 DOI: 10.1016/j.redox.2015.04.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 04/07/2015] [Accepted: 04/08/2015] [Indexed: 01/19/2023] Open
Abstract
Excessive ultraviolet radiation (UVR) exposure of the skin is associated with adverse clinical outcomes. Although both exogenous sunscreens and endogenous tissue components (including melanins and tryptophan-derived compounds) reduce UVR penetration, the role of endogenous proteins in absorbing environmental UV wavelengths is poorly defined. Having previously demonstrated that proteins which are rich in UVR-absorbing amino acid residues are readily degraded by broadband UVB-radiation (containing UVA, UVB and UVC wavelengths) here we hypothesised that UV chromophore (Cys, Trp and Tyr) content can predict the susceptibility of structural proteins in skin and the eye to damage by physiologically relevant doses (up to 15.4 J/cm2) of solar UVR (95% UVA, 5% UVB). We show that: i) purified suspensions of UV-chromophore-rich fibronectin dimers, fibrillin microfibrils and β- and γ-lens crystallins undergo solar simulated radiation (SSR)-induced aggregation and/or decomposition and ii) exposure to identical doses of SSR has minimal effect on the size or ultrastructure of UV chromophore-poor tropoelastin, collagen I, collagen VI microfibrils and α-crystallin. If UV chromophore content is a factor in determining protein stability in vivo, we would expect that the tissue distribution of Cys, Trp and Tyr-rich proteins would correlate with regional UVR exposure. From bioinformatic analysis of 244 key structural proteins we identified several biochemically distinct, yet UV chromophore-rich, protein families. The majority of these putative UV-absorbing proteins (including the late cornified envelope proteins, keratin associated proteins, elastic fibre-associated components and β- and γ-crystallins) are localised and/or particularly abundant in tissues that are exposed to the highest doses of environmental UVR, specifically the stratum corneum, hair, papillary dermis and lens. We therefore propose that UV chromophore-rich proteins are localised in regions of high UVR exposure as a consequence of an evolutionary pressure to express sacrificial protein sunscreens which reduce UVR penetration and hence mitigate tissue damage. Major structural proteins such as collagen I and tropoelastin are UVA-resistant. In contrast, proteins which are rich in Cys, Trp and Tyr residues are UV-susceptible. These proteins are concentrated in UV exposed tissues. UV-chromophore (Cys, Trp, Tyr)-rich proteins may act as endogenous sunscreens.
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Cell Autonomous and Non-Autonomous Effects of Senescent Cells in the Skin. J Invest Dermatol 2015; 135:1722-1726. [PMID: 25855157 PMCID: PMC4466004 DOI: 10.1038/jid.2015.108] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 02/26/2015] [Accepted: 03/07/2015] [Indexed: 01/08/2023]
Abstract
Human and mouse skin accumulate senescent cells in both the epidermis and dermis during aging. When chronically present, senescent cells are thought to enhance the age-dependent deterioration of the skin during extrinsic and intrinsic aging. However, when transiently present, senescent cells promote optimal wound healing. Here, we review recent studies on how senescent cells and the senescence-associated secretory phenotype (SASP) contribute to different physiological and pathophysiological conditions in the skin with a focus on some of the cell autonomous and non-autonomous functions of senescent cells in the context of skin aging and wound healing.
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Over-the-counter anti-ageing topical agents and their ability to protect and repair photoaged skin. Maturitas 2015; 80:265-72. [DOI: 10.1016/j.maturitas.2014.12.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Accepted: 12/30/2014] [Indexed: 01/20/2023]
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Coelho SG, Valencia JC, Yin L, Smuda C, Mahns A, Kolbe L, Miller SA, Beer JZ, Zhang G, Tuma PL, Hearing VJ. UV exposure modulates hemidesmosome plasticity, contributing to long-term pigmentation in human skin. J Pathol 2015; 236:17-29. [PMID: 25488118 DOI: 10.1002/path.4497] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/07/2014] [Accepted: 12/02/2014] [Indexed: 11/09/2022]
Abstract
Human skin colour, ie pigmentation, differs widely among individuals, as do their responses to various types of ultraviolet radiation (UV) and their risks of skin cancer. In some individuals, UV-induced pigmentation persists for months to years in a phenomenon termed long-lasting pigmentation (LLP). It is unclear whether LLP is an indicator of potential risk for skin cancer. LLP seems to have similar features to other forms of hyperpigmentation, eg solar lentigines or age spots, which are clinical markers of photodamage and risk factors for precancerous lesions. To investigate what UV-induced molecular changes may persist in individuals with LLP, clinical specimens from non-sunburn-inducing repeated UV exposures (UVA, UVB or UVA + UVB) at 4 months post-exposure (short-term LLP) were evaluated by microarray analysis and dataset mining. Validated targets were further evaluated in clinical specimens from six healthy individuals (three LLP+ and three LLP-) followed for more than 9 months (long-term LLP) who initially received a single sunburn-inducing UVA + UVB exposure. The results support a UV-induced hyperpigmentation model in which basal keratinocytes have an impaired ability to remove melanin that leads to a compensatory mechanism by neighbouring keratinocytes with increased proliferative capacity to maintain skin homeostasis. The attenuated expression of SOX7 and other hemidesmosomal components (integrin α6β4 and plectin) leads to increased melanosome uptake by keratinocytes and points to a spatial regulation within the epidermis. The reduced density of hemidesmosomes provides supporting evidence for plasticity at the epidermal-dermal junction. Altered hemidesmosome plasticity, and the sustained nature of LLP, may be mediated by the role of SOX7 in basal keratinocytes. The long-term sustained subtle changes detected are modest, but sufficient to create dramatic visual differences in skin colour. These results suggest that the hyperpigmentation phenomenon leading to increased interdigitation develops in order to maintain normal skin homeostasis in individuals with LLP.
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Affiliation(s)
- Sergio G Coelho
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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Stylianou A, Yova D, Alexandratou E. Investigation of the influence of UV irradiation on collagen thin films by AFM imaging. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:455-68. [PMID: 25491851 DOI: 10.1016/j.msec.2014.09.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 08/21/2014] [Accepted: 09/08/2014] [Indexed: 01/06/2023]
Abstract
Collagen is the major fibrous extracellular matrix protein and due to its unique properties, it has been widely used as biomaterial, scaffold and cell-substrate. The aim of the paper was to use Atomic Force Microscopy (AFM) in order to investigate well-characterized collagen thin films after ultraviolet light (UV) irradiation. The films were also used as in vitro culturing substrates in order to investigate the UV-induced alterations to fibroblasts. A special attention was given in the alteration on collagen D-periodicity. For short irradiation times, spectroscopy (fluorescence/absorption) studies demonstrated that photodegradation took place and AFM imaging showed alterations in surface roughness. Also, it was highlighted that UV-irradiation had different effects when it was applied on collagen solution than on films. Concerning fibroblast culturing, it was shown that fibroblast behavior was affected after UV irradiation of both collagen solution and films. Furthermore, after a long irradiation time, collagen fibrils were deformed revealing that collagen fibrils are consisting of multiple shells and D-periodicity occurred on both outer and inner shells. The clarification of the effects of UV light on collagen and the induced modifications of cell behavior on UV-irradiated collagen-based surfaces will contribute to the better understanding of cell-matrix interactions in the nanoscale and will assist in the appropriate use of UV light for sterilizing and photo-cross-linking applications.
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Affiliation(s)
- Andreas Stylianou
- Biomedical Optics and Applied Biophysics Laboratory, Division of Electromagnetics, Electrooptics and Electronic Materials, School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou, Athens 15780 Greece.
| | - Dido Yova
- Biomedical Optics and Applied Biophysics Laboratory, Division of Electromagnetics, Electrooptics and Electronic Materials, School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou, Athens 15780 Greece
| | - Eleni Alexandratou
- Biomedical Optics and Applied Biophysics Laboratory, Division of Electromagnetics, Electrooptics and Electronic Materials, School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou, Athens 15780 Greece
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Watson REB, Gibbs NK, Griffiths CEM, Sherratt MJ. Damage to skin extracellular matrix induced by UV exposure. Antioxid Redox Signal 2014; 21:1063-77. [PMID: 24124905 DOI: 10.1089/ars.2013.5653] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
SIGNIFICANCE Chronic exposure to environmental ultraviolet radiation (UVR) plays a key role in both photocarcinogenesis and induction of accelerated skin aging. Although the spatiotemporal consequences of UVR exposure for the composition and architecture of the dermal extracellular matrix (ECM) are well characterized, the pathogenesis of photoaging remains poorly defined. Given the compelling evidence for the role of reactive oxygen species (ROS) as mediators of photoaging, UVR-exposed human skin may be an accessible model system in which to characterize the role of oxidative damage in both internal and external tissues. RECENT ADVANCES Although the cell-mediated degradation of dermal components via UVR-induced expression of ECM proteases has long been identified as an integral part of the photoaging pathway, the relative importance and identity of cellular and extracellular photosensitizers (direct hit and bystanders models, respectively) in initiating this enzymatic activity is unclear. Recently, both age-related protein glycation and relative amino-acid composition have been identified as potential risk factors for photo-ionization and/or photo-sensitization. Here, we propose a selective multi-hit model of photoaging. CRITICAL ISSUES Bioinformatic analyses can be employed to identify candidate UVR targets/photosensitizers, but the action of UVR on protein structure and/or ROS production should be verified experimentally. Crucially, in the case of biochemically active ECM components such as fibronectin and fibrillin, the downstream effects of photo-degradation on tissue homeostasis remain to be confirmed. FUTURE DIRECTIONS Both topical antioxidants and inhibitors of detrimental cell signaling may be effective in abrogating the effects of specific UVR-mediated protein degradation in the dermis.
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Affiliation(s)
- Rachel E B Watson
- 1 The Dermatology Centre, Salford Royal Hospital, Institute of Inflammation and Repair, The University of Manchester , Manchester Academic Health Science Centre, Manchester, United Kingdom
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Anguria P, Kitinya J, Ntuli S, Carmichael T. The role of heredity in pterygium development. Int J Ophthalmol 2014; 7:563-73. [PMID: 24967209 DOI: 10.3980/j.issn.2222-3959.2014.03.31] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 03/01/2014] [Indexed: 11/02/2022] Open
Abstract
Several risk factors, which include heredity, ultra-violet (UV) light and chronic inflammation, contribute to pterygium development. However, there is no report integrating these factors in the pathogenesis of pterygium. The aim of this review is to describe the connection between heredity, UV, and inflammation in pterygium development. Existing reports indicate that sunlight exposure is the main factor in pterygium occurrence by inducing growth factor production or chronic inflammation or DNA damage. Heredity may be a factor. Our studies on factors in pterygium occurrence and recurrence identify that heredity is crucial for pterygium to develop, and that sunlight is only a trigger, and that chronic inflammation promotes pterygium enlargement. We propose that genetic factors may interfere with the control of fibrovascular proliferation while UV light or (sunlight) most likely only triggers pterygium development by inducing growth factors which promote vibrant fibrovascular proliferation in predisposed individuals. It also just triggers inflammation and collagenolysis, which may be promoters of the enlargement of the fibrovascular mass. Pterygium probably occurs in the presence of exuberant collagen production and profuse neovascularisation.
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Affiliation(s)
- Peter Anguria
- Department of Neurosciences, Division of Ophthalmology, University of the Witwatersrand Johannesburg, 7 York Road, Park Town 2193, South Africa
| | - James Kitinya
- Department of Anatomic Pathology, University of Limpopo Polokwane Campus, Private Bag X9316 Polokwane 0700, South Africa
| | - Sam Ntuli
- Department of Public Health Medicine, University of Limpopo Polokwane Campus, Private Bag X9316 Polokwane 0700, South Africa
| | - Trevor Carmichael
- Department of Neurosciences, Division of Ophthalmology, University of the Witwatersrand Johannesburg, 7 York Road, Park Town 2193, South Africa
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Langton AK, Sherratt MJ, Sellers WI, Griffiths CEM, Watson REB. Geographical ancestry is a key determinant of epidermal morphology and dermal composition. Br J Dermatol 2014; 171:274-82. [PMID: 24484315 DOI: 10.1111/bjd.12860] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/27/2014] [Indexed: 12/31/2022]
Abstract
BACKGROUND Geographical ancestry plays a key role in determining the susceptibility of human skin to external insults and dermatological disease. Despite this, studies of skin from individuals of diverse geographical ancestry focus primarily on epidermal pigmentation. Few reports characterize the gross morphology and composition of the dermis and dermal-epidermal junction (DEJ). OBJECTIVES To characterize epidermal morphology and dermal composition in skin from individuals of diverse geographical ancestry. METHODS Immunohistochemical techniques were used to assess epidermal morphology and protein composition of the DEJ and dermal extracellular matrix in photoprotected skin from young African, Eurasian and Far East Asian individuals (n = 7 per group; age 18-30 years). RESULTS The epidermis of African skin was thicker, with deeper rete ridges and a more convoluted DEJ than Eurasian and Far East Asian skin. Compared with Eurasians, protein composition of the DEJ was collagen VII poor in African and Far East Asian skin (P < 0·001 and P < 0·01, respectively); the dermis of African skin was enriched in fibrillar collagens (P < 0·05), but was relatively elastin poor (P < 0·05). African dermis was abundant in fibrillin-rich microfibrils and fibulin-5 (P < 0·001 and P < 0·001, respectively) compared with Eurasian and Far East Asian skin. CONCLUSIONS We demonstrate that fundamental differences exist in skin structure and composition in individuals of diverse geographical ancestry. Disparate environmental pressures encountered by ancestral human populations living at different latitudes may have driven adaptations in skin structure and composition. Further research into the functional significance and clinical consequences of these differences is warranted.
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Affiliation(s)
- A K Langton
- Centre for Dermatology, Institute of Inflammation and Repair, Manchester Academic Health Science Centre, The University of Manchester, Manchester, U.K; The Dermatology Centre, Salford Royal NHS Foundation Trust, Salford, U.K
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Abstract
Biomarkers and Ageing 25 February 2014, London, UK This conference was organized by Euroscicon and was part of the 2014 Ageing Summit. The central theme was biomarkers and aging including current research on biomarkers at the genomics and proteomics level. The informal atmosphere of the conference promoted interaction and networking opportunities between key leaders from industry, academic and clinics. Presentations as well as the discussion panel session brought opportunities to widely discuss the relevance of biomarkers as signatures for human aging or age-related diseases. The meeting highlighted the importance of genomics and regulatory elements in aging, their probable role in successful aging and their potential interest for future antiaging approaches. The meeting was chaired by David Melzer and Lorna Harries (University of Exeter, UK).
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Affiliation(s)
- Isabelle Imbert
- Ashland, 655 Route du Pin Montard, BP 212, 06904 Sophia-Antipolis Cedex, France
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Grigorescu S, Hindié M, Axente E, Carreiras F, Anselme K, Werckmann J, Mihailescu IN, Gallet O. Fabrication of functional fibronectin patterns by nanosecond excimer laser direct write for tissue engineering applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:1809-1821. [PMID: 23615786 DOI: 10.1007/s10856-013-4927-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 04/06/2013] [Indexed: 06/02/2023]
Abstract
Laser direct write techniques represent a prospective alternative for engineering a new generation of hybrid biomaterials via the creation of patterns consisting of biological proteins onto practically any type of substrate. In this paper we report on the characterization of fibronectin features obtained onto titanium substrates by UV nanosecond laser transfer. Fourier-transform infrared spectroscopy measurements evidenced no modification in the secondary structure of the post-transferred protein. The molecular weight of the transferred protein was identical to the initial fibronectin, no fragment bands being found in the transferred protein's Western blot migration profile. The presence of the cell-binding domain sequence and the mannose groups within the transferred molecules was revealed by anti-fibronectin monoclonal antibody immunolabelling and FITC-Concanavalin-A staining, respectively. The in vitro tests performed with MC3T3-E1 osteoblast-like cells and Swiss-3T3 fibroblasts showed that the cells' morphology and spreading were strongly influenced by the presence of the fibronectin spots.
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Affiliation(s)
- S Grigorescu
- Equipe de Recherche sur les Relations Matrice Extracellulaire-Cellules, Université de Cergy-Pontoise, 2 Av. Adolphe Chauvin, 95302, Cergy Pontoise, France.
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Liu M, Wu R, Yang F, Wang T, Zhang P, Gu J, Wan D, Yang S. Identification of FN1BP1 as a novel cell cycle regulator through modulating G1 checkpoint in human hepatocarcinoma Hep3B cells. PLoS One 2013; 8:e57574. [PMID: 23469028 PMCID: PMC3585200 DOI: 10.1371/journal.pone.0057574] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 01/22/2013] [Indexed: 01/05/2023] Open
Abstract
A novel human gene, FN1BP1 (fibronectin 1 binding protein 1), was identified using the human placenta cDNA library. Northern blotting showed a transcript of ∼2.8 kb in human placenta, liver, and skeletal muscle tissues. This mRNA transcript length was similar to the full FN1BP1 sequence obtained previously. We established a conditionally induced stable cell line of Hep3B-Tet-on-FN1BP1 to investigate the preliminary function and mechanism of the secretory FN1BP1 protein. Cell-proliferation and colony-conformation assays demonstrated that FN1BP1 protein suppressed Hep3B cell growth and colonization in vitro. Analysis of Atlas human cDNA expression indicated that after FN1BP1 Dox-inducing expression for 24 h, 19 genes were up-regulated and 22 genes were down-regulated more than two-fold. Most of these gene changes were related to cell-cycle-arrest proteins (p21cip1, p15, and cyclin E1), transcription factors (general transcription factors, zinc finger proteins, transcriptional enhancer factors), SWI/SNF (SWItch/Sucrose NonFermentable) complex units, early-response proteins, and nerve growth or neurotrophic factors. Down-regulated genes were subject to colony-stimulating factors (e.g., GMSFs), and many repair genes were involved in DNA damage (RAD, ERCC, DNA topoisomerase, polymerase, and ligase). Some interesting genes (p21cip1, ID2, GMSF, ERCC5, and RPA1), which changed in the cDNA microarray analysis, were confirmed by semi-qRT-PCR, and similar changes in expression were observed. FCM cell-cycle analysis indicated that FN1BP1 over-expression could result in G1 phase arrest. FN1BP1 might inhibit cell growth and/or colony conformation through G1 phase arrest of the Hep3B cell cycle. These results indicate the potential role of FN1BP1 as a treatment target for hepatocellular carcinoma.
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Affiliation(s)
- Mei Liu
- The Jingsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu, China
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiaotong University, Shanghai, China
| | - Ronghua Wu
- The Jingsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu, China
| | - Fuye Yang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiaotong University, Shanghai, China
| | - Tao Wang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiaotong University, Shanghai, China
| | - Pingping Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiaotong University, Shanghai, China
| | - Jianren Gu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiaotong University, Shanghai, China
| | - Dafang Wan
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiaotong University, Shanghai, China
| | - Shengli Yang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiaotong University, Shanghai, China
- * E-mail:
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Sherratt MJ. Age-Related Tissue Stiffening: Cause and Effect. Adv Wound Care (New Rochelle) 2013; 2:11-17. [PMID: 24527318 DOI: 10.1089/wound.2011.0328] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Indexed: 11/12/2022] Open
Abstract
SIGNIFICANCE Tissue elasticity is severely compromised in aging skin, lungs, and blood vessels. In the vascular and pulmonary systems, respectively, loss of mechanical function is linked to hypertension, which in turn is a risk factor for heart and renal failure, stroke, and aortic aneurysms, and to an increased risk of mortality as a result of acute lung infections. RECENT ADVANCES Although cellular mechanisms were thought to play an important role in mediating tissue aging, the reason for the apparent sensitivity of elastic fibers to age-related degradation remained unclear. We have recently demonstrated that compared with type I collagen, a key component of the elastic fiber system, the cysteine-rich fibrillin microfibril is highly susceptible to direct UV exposure in a cell-free environment. We hypothesized therefore that, as a consequence of both their remarkable longevity and cysteine-rich composition, many elastic fiber-associated components will be susceptible to the accumulation of damage by both direct UV radiation and reactive oxygen species-mediated oxidation. CRITICAL ISSUES Although elastic fiber remodeling is a common feature of aging dynamic tissues, the inaccessibility of most human tissues has hampered attempts to define the molecular causes. CLINICAL CARE RELEVANCE Although, currently, the localized repair of damaged elastic fibers may be effected by the topical application of retinoids and some cosmetic products, future studies may extend the application of systemic transforming growth factor β antagonists, which can prevent cardiovascular remodeling in murine Marfan syndrome, to aging humans. Acellular mechanisms may be key mediators of elastic fiber remodeling and hence age-related tissue stiffening.
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Affiliation(s)
- Michael J. Sherratt
- Manchester Academic Health Sciences Centre and School of Regenerative Biomedicine, Faculty of Medical and Human Sciences, The University of Manchester, Manchester, United Kingdom
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Thurstan SA, Gibbs NK, Langton AK, Griffiths CE, Watson RE, Sherratt MJ. Chemical consequences of cutaneous photoageing. Chem Cent J 2012; 6:34. [PMID: 22534143 PMCID: PMC3410765 DOI: 10.1186/1752-153x-6-34] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 04/25/2012] [Indexed: 12/28/2022] Open
Abstract
Human skin, in common with other organs, ages as a consequence of the passage of time, but in areas exposed to solar ultraviolet radiation, the effects of this intrinsic ageing process are exacerbated. In particular, both the severity and speed of onset of age-related changes, such as wrinkle formation and loss of elasticity, are enhanced in photoaged (also termed extrinsically aged) as compared with aged, photoprotected, skin. The anatomy of skin is characterised by two major layers: an outer, avascular, yet highly cellular and dynamic epidermis and an underlying vascularised, comparatively static and cell-poor, dermis. The structural consequences of photoageing are mainly evident in the extracellular matrix-rich but cell-poor dermis where key extracellular matrix proteins are particularly susceptible to photodamage. Most investigations to date have concentrated on the cell as both a target for and mediator of, ultraviolet radiation-induced photoageing. As the main effectors of dermal remodelling produced by cells (extracellular proteases) generally have low substrate specificity, we recently suggested that the differential susceptibility of key extracellular matrix proteins to the processes of photoageing may be due to direct, as opposed to cell-mediated, photodamage. In this review, we discuss the experimental evidence for ultraviolet radiation (and related reactive oxygen species)-mediated differential degradation of normally long lived dermal proteins including the fibrillar collagens, elastic fibre components, glycoproteins and proteoglycans. Whilst these components exhibit highly diverse primary and hence macro- and supra-molecular structures, we present evidence that amino acid composition alone may be a useful predictor of age-related protein degradation in both photoexposed and, as a consequence of differential oxidation sensitivity, photoprotected, tissues.
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Affiliation(s)
- Sarah A Thurstan
- Developmental Biomedicine Research Groups, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK.
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Vedrenne N, Coulomb B, Danigo A, Bonté F, Desmoulière A. The complex dialogue between (myo)fibroblasts and the extracellular matrix during skin repair processes and ageing. ACTA ACUST UNITED AC 2012; 60:20-7. [DOI: 10.1016/j.patbio.2011.10.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Accepted: 09/16/2011] [Indexed: 01/31/2023]
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49
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Kasamatsu S, Hachiya A, Fujimura T, Sriwiriyanont P, Haketa K, Visscher MO, Kitzmiller WJ, Bello A, Kitahara T, Kobinger GP, Takema Y. Essential role of microfibrillar-associated protein 4 in human cutaneous homeostasis and in its photoprotection. Sci Rep 2011; 1:164. [PMID: 22355679 PMCID: PMC3240987 DOI: 10.1038/srep00164] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Accepted: 11/08/2011] [Indexed: 11/26/2022] Open
Abstract
UVB-induced cutaneous photodamage/photoaging is characterized by qualitative and quantitative deterioration in dermal extracellular matrix (ECM) components such as collagen and elastic fibers. Disappearance of microfibrillar-associated protein 4 (MFAP-4), a possible limiting factor for cutaneous elasticity, was documented in photoaged dermis, but its function is poorly understood. To characterize its possible contribution to photoprotection, MFAP-4 expression was either augmented or inhibited in a human skin xenograft photodamage murine model and human fibroblasts. Xenografted skin with enhanced MFAP-4 expression was protected from UVB-induced photodamage/photoaging accompanied by the prevention of ECM degradation and aggravated elasticity. Additionally, remarkably increased or decreased fibrillin-1-based microfibril development was observed when fibroblasts were treated with recombinant MFAP-4 or with MFAP-4-specific siRNA, respectively. Immunoprecipitation analysis confirmed direct interaction between MFAP-4 and fibrillin-1. Taken together, our findings reveal the essential role of MFAP-4 in photoprotection and offer new therapeutic opportunities to prevent skin-associated pathologies.
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Affiliation(s)
- Shinya Kasamatsu
- Biological Science Laboratories, Kao Corporation, Haga, Tochigi, 321–3497, Japan
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50
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Naylor EC, Watson REB, Sherratt MJ. Molecular aspects of skin ageing. Maturitas 2011; 69:249-56. [PMID: 21612880 DOI: 10.1016/j.maturitas.2011.04.011] [Citation(s) in RCA: 310] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 04/20/2011] [Indexed: 11/16/2022]
Abstract
Ageing of human skin may result from both the passage of time (intrinsic ageing) and from cumulative exposure to external influences (extrinsic ageing) such as ultraviolet radiation (UVR) which promote wrinkle formation and loss of tissue elasticity. Whilst both ageing processes are associated with phenotypic changes in cutaneous cells, the major functional manifestations of ageing occur as a consequence of structural and compositional remodeling of normally long-lived dermal extracellular matrix proteins. This review briefly considers the effects of ageing on dermal collagens and proteoglycans before focusing on the mechanisms, functional consequences and treatment of elastic fibre remodeling in ageing skin. The early stages of photoageing are characterised by the differential degradation of elastic fibre proteins and whilst the activity of extracellular matrix proteases is increased in photoexposed skin, the substrate specificity of these enzymes is low. We have recently shown however, that isolated fibrillin microfibrils are susceptible to direct degradation by physiologically attainable doses of UV-B radiation and that elastic fibre proteins as a group are highly enriched in UV-absorbing amino acid residues. Functionally, elastic fibre remodeling events may adversely impact on: the mechanical properties of tissues, the recruitment and activation of immune cells, the expression of matrix metalloproteinases and cytokine signaling (by perturbing fibrillin microfibril sequestration of TGFβ). Finally, newly developed topical interventions appear to be capable of regenerating elements of the elastic fibre system in ageing skin, whilst systemic treatments may potentially prevent the pathological tissue remodeling events which occur in response to elastic fibre degradation.
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Affiliation(s)
- Elizabeth C Naylor
- Manchester Academic Health Sciences Centre, The University of Manchester, Manchester M13 9PT, UK
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