1
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Juárez-Vicuña Y, Ruiz-Ojeda D, González-Ramírez J, Flores-Balderas X, Springall R, Sánchez-Muñoz F, Guzmán-Martín CA. LncRNA MALAT1 in Keratinocyte function: A review of recent advances. Noncoding RNA Res 2024; 9:594-601. [PMID: 38532797 PMCID: PMC10963180 DOI: 10.1016/j.ncrna.2024.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/19/2024] [Accepted: 01/30/2024] [Indexed: 03/28/2024] Open
Abstract
Keratinocytes, the principal epidermal cells, play a vital role in maintaining the structural integrity and functionality of the skin. Beyond their protective role, keratinocytes are key contributors to the process of wound healing, as they migrate to injury sites, proliferate, and generate new layers of epidermis, facilitating tissue repair and remodeling. Moreover, keratinocytes actively participate in the skin's immune responses, expressing pattern recognition receptors (PRRs) to detect microbial components and interact with immune cells to influence adaptive immunity. Keratinocytes express a diverse repertoire of signaling pathways, transcription factors, and epigenetic regulators to regulate their growth, differentiation, and response to environmental cues. Among these regulatory elements, long non-coding RNAs (lncRNAs) have emerged as essential players in keratinocyte biology. LncRNAs, including MALAT1, play diverse roles in gene regulation and cellular processes, influencing keratinocyte proliferation, differentiation, migration, and response to environmental stimuli. Dysregulation of specific lncRNAs such as MALAT1 can disrupt keratinocyte homeostasis, leading to impaired differentiation, compromised barrier integrity, and contributing to the pathogenesis of various skin disorders. Understanding the intricate interplay between lncRNAs and keratinocytes offers promising insights into the molecular underpinnings of skin health and disease, with potential implications for targeted therapies and advancements in dermatological research. Hence, our objective is to provide a comprehensive summary of the available knowledge concerning keratinocytes and their intricate relationship with MALAT1.
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Affiliation(s)
- Yaneli Juárez-Vicuña
- Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico
| | - Dayanara Ruiz-Ojeda
- Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico
- Posgrado en Medicina Interna, Hospital Central Sur de Alta Especialidad de Petróleos Mexicanos, Ciudad de México, Mexico
| | - Javier González-Ramírez
- Facultad de Enfermería, Universidad Autónoma de Baja California, Mexicali, Baja California, Mexico
- Laboratorio de Biología Celular, Unidad de Ciencias de La Salud Campus Mexicali, Universidad Autónoma de Baja California, Mexicali, Baja California, Mexico
| | - Ximena Flores-Balderas
- Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico
| | - Rashidi Springall
- Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico
| | - Fausto Sánchez-Muñoz
- Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico
| | - Carlos A. Guzmán-Martín
- Doctorado en Ciencias Biológicas y de La Salud, Universidad Autónoma Metropolitana, Ciudad de México, Mexico
- Departamento de Programas de Investigación, Hospital Shriners para Niños México, Ciudad de México, Mexico
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2
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Sugawara K, Zákány N, Tiede S, Purba T, Harries M, Tsuruta D, Bíró T, Paus R. Human epithelial stem cell survival within their niche requires "tonic" cannabinoid receptor 1-signalling-Lessons from the hair follicle. Exp Dermatol 2021; 30:479-493. [PMID: 33523535 DOI: 10.1111/exd.14294] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 12/17/2020] [Accepted: 01/06/2021] [Indexed: 12/23/2022]
Abstract
The endocannabinoid system (ECS) regulates multiple aspects of human epithelial physiology, including inhibition/stimulation of keratinocyte proliferation/apoptosis, respectively. Yet, how the ECS impacts on human adult epithelial stem cell (eSC) functions remains unknown. Scalp hair follicles (HFs) offer a clinically relevant, prototypic model system for studying this directly within the native human stem cell niche. Here, we show in organ-cultured human HFs that, unexpectedly, selective activation of cannabinoid receptor-1 (CB1)-mediated signalling via the MAPK (MEK/Erk 1/2) and Akt pathways significantly increases the number and proliferation of cytokeratin CK15+ or CK19+ human HF bulge eSCs in situ, and enhances CK15 promoter activity in situ. In striking contrast, CB1-stimulation promotes apoptosis in the differentiated progeny of these eSCs (CK6+ HF keratinocytes). Instead, intrafollicular CB1 gene knockdown or CB1 antagonist treatment significantly reduces human HF eSCs numbers and stimulates their apoptosis, while CB1 knockout mice exhibit a reduced bulge eSCs pool in vivo. This identifies "tonic" CB1 signalling as a required survival stimulus for adult human HF eSCs within their niche. This novel concept must be taken into account whenever the human ECS is targeted therapeutically.
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Affiliation(s)
- Koji Sugawara
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | | | - Stephan Tiede
- Department of Biochemistry, Children's Hospital, University of Hamburg, Hamburg, Germany
| | - Talveen Purba
- Centre for Dermatology Research, School of Biological Sciences, University of Manchester, MAHSC, NIHR Biomedical Research Centre, Manchester, UK
| | - Matthew Harries
- Centre for Dermatology Research, School of Biological Sciences, University of Manchester, MAHSC, NIHR Biomedical Research Centre, Manchester, UK.,The Dermatology Centre, Salford Royal NHS Foundation Trust, Manchester, UK
| | - Daisuke Tsuruta
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Tamás Bíró
- Monasterium Laboratory, Münster, Germany
| | - Ralf Paus
- Monasterium Laboratory, Münster, Germany.,Centre for Dermatology Research, School of Biological Sciences, University of Manchester, MAHSC, NIHR Biomedical Research Centre, Manchester, UK.,Dr Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
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3
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Jiang Y, Tsoi LC, Billi AC, Ward NL, Harms PW, Zeng C, Maverakis E, Kahlenberg JM, Gudjonsson JE. Cytokinocytes: the diverse contribution of keratinocytes to immune responses in skin. JCI Insight 2020; 5:142067. [PMID: 33055429 PMCID: PMC7605526 DOI: 10.1172/jci.insight.142067] [Citation(s) in RCA: 114] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The skin serves as the primary interface between our body and the external environment and acts as a barrier against entry of physical agents, chemicals, and microbes. Keratinocytes make up the main cellular constitute of the outermost layer of the skin, contributing to the formation of the epidermis, and they are crucial for maintaining the integrity of this barrier. Beyond serving as a physical barrier component, keratinocytes actively participate in maintaining tissue homeostasis, shaping, amplifying, and regulating immune responses in skin. Keratinocytes act as sentinels, continuously monitoring changes in the environment, and, through microbial sensing, stretch, or other physical stimuli, can initiate a broad range of inflammatory responses via secretion of various cytokines, chemokines, and growth factors. This diverse function of keratinocytes contributes to the highly variable clinical manifestation of skin immune responses. In this Review, we highlight the highly diverse functions of epidermal keratinocytes and their contribution to various immune-mediated skin diseases.
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Affiliation(s)
- Yanyun Jiang
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, USA.,Department of Dermatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Lam C Tsoi
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, USA.,Department of Computational Medicine and Bioinformatics and Department of Biostatistics, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Allison C Billi
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, USA
| | - Nicole L Ward
- Department of Nutrition and Department of Dermatology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Paul W Harms
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Chang Zeng
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, USA
| | - Emanual Maverakis
- Department of Dermatology, University of California, Davis, Sacramento, California, USA
| | - J Michelle Kahlenberg
- Division of Rheumatology, Department of Internal Medicine, University of Michigan, Michigan, USA.,A. Alfred Taubman Medical Research Institute, Michigan, USA
| | - Johann E Gudjonsson
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, USA.,A. Alfred Taubman Medical Research Institute, Michigan, USA
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4
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Nasiri G, Azarpira N, Alizadeh A, Goshtasbi S, Tayebi L. Shedding light on the role of keratinocyte-derived extracellular vesicles on skin-homing cells. Stem Cell Res Ther 2020; 11:421. [PMID: 32993791 PMCID: PMC7523352 DOI: 10.1186/s13287-020-01929-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/08/2020] [Indexed: 01/03/2023] Open
Abstract
Extracellular vesicles (EVs) are secretory lipid membranes with the ability to regulate cellular functions by exchanging biological components between different cells. Resident skin cells such as keratinocytes, fibroblasts, melanocytes, and inflammatory cells can secrete different types of EVs depending on their biological state. These vesicles can influence the physiological properties and pathological processes of skin, such as pigmentation, cutaneous immunity, and wound healing. Since keratinocytes constitute the majority of skin cells, secreted EVs from these cells may alter the pathophysiological behavior of other skin cells. This paper reviews the contents of keratinocyte-derived EVs and their impact on fibroblasts, melanocytes, and immune cells to provide an insight for better understanding of the pathophysiological mechanisms of skin disorders and their use in related therapeutic approaches.
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Affiliation(s)
- Golara Nasiri
- Department of Tissue Engineering and Cell Therapy, School of Advanced Technologies in Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Negar Azarpira
- Transplant Research Center, Shiraz University of Medical Sciences, Khalili Street, Shiraz, 7193711351 Iran
| | - Aliakbar Alizadeh
- Department of Tissue Engineering and Cell Therapy, School of Advanced Technologies in Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sanaz Goshtasbi
- Transplant Research Center, Shiraz University of Medical Sciences, Khalili Street, Shiraz, 7193711351 Iran
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI 53233 USA
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Ushach I, Burkhardt AM, Martinez C, Hevezi PA, Gerber PA, Buhren BA, Schrumpf H, Valle-Rios R, Vazquez MI, Homey B, Zlotnik A. METEORIN-LIKE is a cytokine associated with barrier tissues and alternatively activated macrophages. Clin Immunol 2014; 156:119-27. [PMID: 25486603 DOI: 10.1016/j.clim.2014.11.006] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 11/19/2014] [Accepted: 11/22/2014] [Indexed: 01/16/2023]
Abstract
Cytokines are involved in many functions of the immune system including initiating, amplifying and resolving immune responses. Through bioinformatics analyses of a comprehensive database of gene expression (BIGE: Body Index of Gene Expression) we observed that a small secreted protein encoded by a poorly characterized gene called meteorin-like (METRNL), is highly expressed in mucosal tissues, skin and activated macrophages. Further studies indicate that Metrnl is produced by Alternatively Activated Macrophages (AAM) and M-CSF cultured bone marrow macrophages (M2-like macrophages). In the skin, METRNL is expressed by resting fibroblasts and IFNγ-treated keratinocytes. A screen of human skin-associated diseases showed significant over-expression of METRNL in psoriasis, prurigo nodularis, actinic keratosis and atopic dermatitis. METRNL is also up-regulated in synovial membranes of human rheumatoid arthritis. Taken together, these results indicate that Metrnl represents a novel cytokine, which is likely involved in both innate and acquired immune responses.
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Affiliation(s)
- Irina Ushach
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA; Institute for Immunology, University of California Irvine, Irvine, CA, USA
| | - Amanda M Burkhardt
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA; Institute for Immunology, University of California Irvine, Irvine, CA, USA
| | - Cynthia Martinez
- Department of Dermatology, School of Medicine, University of Duesseldorf, Duesseldorf, Germany
| | - Peter A Hevezi
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA; Institute for Immunology, University of California Irvine, Irvine, CA, USA
| | - Peter Arne Gerber
- Department of Dermatology, School of Medicine, University of Duesseldorf, Duesseldorf, Germany
| | | | - Holger Schrumpf
- Department of Dermatology, School of Medicine, University of Duesseldorf, Duesseldorf, Germany
| | - Ricardo Valle-Rios
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA; Institute for Immunology, University of California Irvine, Irvine, CA, USA; Present address: Laboratory of Immunology and Proteomics, Children's Hospital of Mexico, Mexico, D.F. 06720, Mexico
| | - Monica I Vazquez
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA; Institute for Immunology, University of California Irvine, Irvine, CA, USA
| | - Bernhard Homey
- Department of Dermatology, School of Medicine, University of Duesseldorf, Duesseldorf, Germany
| | - Albert Zlotnik
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA; Institute for Immunology, University of California Irvine, Irvine, CA, USA.
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6
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Vogt A, Blume-Peytavi U. Selective hair therapy: bringing science to the fiction. Exp Dermatol 2014; 23:83-6. [PMID: 24387677 DOI: 10.1111/exd.12318] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/30/2013] [Indexed: 01/17/2023]
Abstract
Investigations on carrier-based drug delivery systems for higher selectivity in hair therapy have clearly evolved from dye release and model studies to highly sophisticated approaches, many of which specifically tackle hair indications and the delivery of hair-relevant molecules. Here, we group recent hair disease-oriented work into efforts towards (i) improved delivery of conventional drugs, (ii) delivery of novel drug classes, for example biomolecules and (iii) targeted delivery on the cellular/molecular level. Considering the solid foundation of experimental work, it does not take a large step outside the current box of thinking to follow the idea of using large carriers (>500 nm, unlikely to penetrate as a whole) for follicular penetration, retention and protection of sensitive compounds. Yet, reports on particles <200 nm being internalized by keratinocytes and dendritic cells at sites of barrier disruption (e.g., hair follicles) combined with recent advances in nanodermatology add interesting new facets to the possibilities carrier technologies could offer, for example, unprecedented levels of selectivity. The authors provide thought-provoking ideas on how smart delivery technologies and advances in our molecular understanding of hair pathophysiology could result in a whole new era of hair therapeutics. As the field still largely remains in preclinical investigation, determined efforts towards production of medical grade material and truly translational work are needed to demonstrate surplus value of carrier systems for clinical applications.
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Affiliation(s)
- Annika Vogt
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Berlin, Germany
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7
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Kotzerke K, Mempel M, Aung T, Wulf GG, Urlaub H, Wenzel D, Schön MP, Braun A. Immunostimulatory activity of murine keratinocyte-derived exosomes. Exp Dermatol 2013; 22:650-5. [DOI: 10.1111/exd.12230] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/20/2013] [Indexed: 01/25/2023]
Affiliation(s)
- Kristina Kotzerke
- Department of Dermatology, Venereology, and Allergology; Georg August University; Göttingen; Germany
| | - Martin Mempel
- Department of Dermatology, Venereology, and Allergology; Georg August University; Göttingen; Germany
| | - Thiha Aung
- Department of Hematology and Oncology; Georg August University; Göttingen; Germany
| | - Gerald G. Wulf
- Department of Hematology and Oncology; Georg August University; Göttingen; Germany
| | | | - Dirk Wenzel
- Electron Microscopy Group; Max Planck Institute for Biophysical Chemistry; Göttingen; Germany
| | - Michael P. Schön
- Department of Dermatology, Venereology, and Allergology; Georg August University; Göttingen; Germany
| | - Andrea Braun
- Department of Dermatology, Venereology, and Allergology; Georg August University; Göttingen; Germany
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8
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Lecardonnel J, Deshayes N, Genty G, Parent N, Bernard BA, Rathman-Josserand M, Paris M. Ageing and colony-forming efficiency of human hair follicle keratinocytes. Exp Dermatol 2013; 22:604-6. [DOI: 10.1111/exd.12204] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2013] [Indexed: 01/23/2023]
Affiliation(s)
- Jennifer Lecardonnel
- Department of Biological and Clinical Research; L'Oreal Advanced Research; Clichy; France
| | - Nathalie Deshayes
- Department of Biological and Clinical Research; L'Oreal Advanced Research; Clichy; France
| | - Gaïanne Genty
- Department of Biological and Clinical Research; L'Oreal Advanced Research; Clichy; France
| | - Nathalie Parent
- Department of Biological and Clinical Research; L'Oreal Advanced Research; Clichy; France
| | - Bruno A. Bernard
- Department of Biological and Clinical Research; L'Oreal Advanced Research; Clichy; France
| | | | - Maryline Paris
- Department of Biological and Clinical Research; L'Oreal Advanced Research; Clichy; France
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