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Gao H, Kosins AE, Cook-Mills JM. Mechanisms for initiation of food allergy by skin pre-disposed to atopic dermatitis. Immunol Rev 2024. [PMID: 39007725 DOI: 10.1111/imr.13367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Food allergy can be life-threatening and often develops early in life. In infants and children, loss-of-function mutations in skin barrier genes associate with food allergy. In a mouse model with skin barrier mutations (Flakey Tail, FT+/- mice), topical epicutaneous sensitization to a food allergen peanut extract (PNE), an environmental allergen Alternaria alternata (Alt) and a detergent induce food allergy and then an oral PNE-challenge induces anaphylaxis. Exposures to these allergens and detergents can occur for infants and children in a household setting. From the clinical and preclinical studies of neonates and children with skin barrier mutations, early oral exposure to allergenic foods before skin sensitization may induce tolerance to food allergens and thus protect against development of food allergy. In the FT+/- mice, oral food allergen prior to skin sensitization induce tolerance to food allergens. However, when the skin of FT+/- pups are exposed to a ubiquitous environmental allergen at the time of oral consumption of food allergens, this blocks the induction of tolerance to the food allergen and the mice can then be skin sensitized with the food allergen. The development of food allergy in neonatal FT+/- mice is mediated by altered skin responses to allergens with increases in skin expression of interleukin 33, oncostatin M and amphiregulin. The development of neonate food allergy is enhanced when born to an allergic mother, but it is inhibited by maternal supplementation with α-tocopherol. Moreover, preclinical studies suggest that food allergen skin sensitization can occur before manifestation of clinical features of atopic dermatitis. Thus, these parameters may impact design of clinical studies for food allergy, when stratifying individuals by loss of skin barrier function or maternal atopy before offspring development of atopic dermatitis.
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Affiliation(s)
- Haoran Gao
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Allison E Kosins
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Joan M Cook-Mills
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, USA
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2
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Gonzalez-Visiedo M, Herzog RW, Munoz-Melero M, Blessinger SA, Cook-Mills JM, Daniell H, Markusic DM. Viral Vector Based Immunotherapy for Peanut Allergy. Viruses 2024; 16:1125. [PMID: 39066287 PMCID: PMC11281582 DOI: 10.3390/v16071125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Revised: 07/10/2024] [Accepted: 07/11/2024] [Indexed: 07/28/2024] Open
Abstract
Food allergy (FA) is estimated to impact up to 10% of the population and is a growing health concern. FA results from a failure in the mucosal immune system to establish or maintain immunological tolerance to innocuous dietary antigens, IgE production, and the release of histamine and other mediators upon exposure to a food allergen. Of the different FAs, peanut allergy has the highest incidence of severe allergic responses, including systemic anaphylaxis. Despite the recent FDA approval of peanut oral immunotherapy and other investigational immunotherapies, a loss of protection following cessation of therapy can occur, suggesting that these therapies do not address the underlying immune response driving FA. Our lab has shown that liver-directed gene therapy with an adeno-associated virus (AAV) vector induces transgene product-specific regulatory T cells (Tregs), eradicates pre-existing pathogenic antibodies, and protects against anaphylaxis in several models, including ovalbumin induced FA. In an epicutaneous peanut allergy mouse model, the hepatic AAV co-expression of four peanut antigens Ara h1, Ara h2, Ara h3, and Ara h6 together or the single expression of Ara h3 prevented the development of a peanut allergy. Since FA patients show a reduction in Treg numbers and/or function, we believe our approach may address this unmet need.
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Affiliation(s)
- Miguel Gonzalez-Visiedo
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA (M.M.-M.); (S.A.B.); (J.M.C.-M.)
| | - Roland W. Herzog
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA (M.M.-M.); (S.A.B.); (J.M.C.-M.)
| | - Maite Munoz-Melero
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA (M.M.-M.); (S.A.B.); (J.M.C.-M.)
| | - Sophia A. Blessinger
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA (M.M.-M.); (S.A.B.); (J.M.C.-M.)
| | - Joan M. Cook-Mills
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA (M.M.-M.); (S.A.B.); (J.M.C.-M.)
| | - Henry Daniell
- Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
| | - David M. Markusic
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA (M.M.-M.); (S.A.B.); (J.M.C.-M.)
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3
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Jee MH, Funch AB, Weber JF, Yeung K, Mraz V, Gadsbøll ASØ, Song T, Woetmann A, Ødum N, Johansen JD, Geisler C, Bonefeld CM. Pre-existing inflammation reduces the response to contact allergens in Tmem79-deficient mice. Allergy 2024; 79:1978-1981. [PMID: 38366993 DOI: 10.1111/all.16053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/22/2024] [Accepted: 02/02/2024] [Indexed: 02/19/2024]
Affiliation(s)
- Mia Hamilton Jee
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Dermato-Allergology, National Allergy Research Centre, Copenhagen University Hospital Herlev-Gentofte, Hellerup, Denmark
| | - Anders Boutrup Funch
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Dermato-Allergology, National Allergy Research Centre, Copenhagen University Hospital Herlev-Gentofte, Hellerup, Denmark
| | - Julie Friis Weber
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kelvin Yeung
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Veronika Mraz
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anne-Sofie Østergaard Gadsbøll
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Tinghuan Song
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anders Woetmann
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Niels Ødum
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jeanne Duus Johansen
- Department of Dermato-Allergology, National Allergy Research Centre, Copenhagen University Hospital Herlev-Gentofte, Hellerup, Denmark
| | - Carsten Geisler
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Charlotte Menné Bonefeld
- Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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4
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Lei J, Tominaga M. Unlocking the therapeutic potential of TRPV3: Insights into thermosensation, channel modulation, and skin homeostasis involving TRPV3. Bioessays 2024; 46:e2400047. [PMID: 38769699 DOI: 10.1002/bies.202400047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/02/2024] [Accepted: 05/06/2024] [Indexed: 05/22/2024]
Abstract
Recent insights reveal the significant role of TRPV3 in warmth sensation. A novel finding elucidated how thermosensation is affected by TRPV3 membrane abundance that is modulated by the transmembrane protein TMEM79. TRPV3 is a warmth-sensitive ion channel predominantly expressed in epithelial cells, particularly skin keratinocytes. Multiple studies investigated the roles of TRPV3 in cutaneous physiology and pathophysiology. TRPV3 activation by innocuous warm temperatures in keratinocytes highlights its significance in temperature sensation, but whether TRPV3 directly contributes to warmth sensations in vivo remains controversial. This review explores the electrophysiological and structural properties of TRPV3 and how modulators affect its intricate regulatory mechanisms. Moreover, we discuss the multifaceted involvement of TRPV3 in skin physiology and pathology, including barrier formation, hair growth, inflammation, and itching. Finally, we examine the potential of TRPV3 as a therapeutic target for skin diseases and highlight its diverse role in maintaining skin homeostasis.
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Affiliation(s)
- Jing Lei
- Division of Cell Signaling, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, Japan
- Thermal Biology Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Japan
- Department of Dermatology, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Makoto Tominaga
- Division of Cell Signaling, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, Japan
- Thermal Biology Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Japan
- Thermal Biology Research Group, Nagoya Advanced Research and Development Center, Nagoya City University, Nagoya, Japan
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5
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Wong TK, Choi YG, Li PH, Chow BKC, Kumar M. MRGPRX2 antagonist GE1111 attenuated DNFB-induced atopic dermatitis in mice by reducing inflammatory cytokines and restoring skin integrity. Front Immunol 2024; 15:1406438. [PMID: 38817611 PMCID: PMC11137259 DOI: 10.3389/fimmu.2024.1406438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 04/26/2024] [Indexed: 06/01/2024] Open
Abstract
Introduction Atopic dermatitis (AD) is a chronic inflammatory skin disorder characterised by itching, erythema, and epidermal barrier dysfunction. The pathogenesis of AD is complex and multifactorial; however,mast cell (MC) activation has been reported to be one of the crucial mechanisms in the pathogenesis of AD. The MC receptor Mas related G protein-coupled receptor-X2 (MRGPRX2) has been identified as a prominent alternative receptor to the IgE receptor in causing MC activation and the subsequent release of inflammatory mediators. The current study aimed to evaluate the therapeutic effect of a novel small molecule MRGPRX2 antagonist GE1111 in AD using in vitro and in vivo approaches. Methods We developed an in vitro cell culture disease model by using LAD-2 MC, HaCaT keratinocytes and RAW 264.7 macrophage cell lines. We challenged keratinocytes and macrophage cells with CST-14 treated MC supernatant in the presence and absence of GE1111 and measured the expression of tight junction protein claudin 1, inflammatory cytokines and macrophage phagocytosis activity through immunohistochemistry, western blotting, RT-qPCR and fluorescence imaging techniques. In addition to this, we developed a DFNB-induced AD model in mice and evaluated the protective effect and underlying mechanism of GE1111. Results and Discussion Our in vitro findings demonstrated a potential therapeutic effect of GE1111, which inhibits the expression of TSLP, IL-13, MCP-1, TNF-a, and IL-1ß in MC and keratinocytes. In addition to this, GE1111 was able to preserve the expression of claudin 1 in keratinocytes and the phagocytotic activity of macrophage cells. The in vivo results demonstrated that GE1111 treatment significantly reduced phenotypic changes associated with AD (skin thickening, scaling, erythema and epidermal thickness). Furthermore, immunohistochemical analysis demonstrated that GE1111 treatment preserved the expression of the tight junction protein Involucrin and reduced the expression of the inflammatory mediator periostin in the mouse model of AD. These findings were supported by gene and protein expression analysis, where GE1111 treatment reduced the expression of TSLP, IL-13, and IL-1ß, as well as downstream signalling pathways of MRGPRX2 in AD skin lesions. In conclusion, our findings provide compelling in vitro and in vivo evidence supporting the contribution of MRGPRX2-MC interaction with keratinocytes and macrophages in the pathogenesis of AD.
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Affiliation(s)
- Trevor K. Wong
- School of Biological Sciences, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
- Faculty of Health Sciences, McMaster University, Hamliton, ON, Canada
| | - Ye Gi Choi
- School of Biological Sciences, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Philip H. Li
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong SAR, China
| | - Billy K. C. Chow
- School of Biological Sciences, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Mukesh Kumar
- School of Biological Sciences, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
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Schuler CF, Tsoi LC, Billi AC, Harms PW, Weidinger S, Gudjonsson JE. Genetic and Immunological Pathogenesis of Atopic Dermatitis. J Invest Dermatol 2024; 144:954-968. [PMID: 38085213 PMCID: PMC11040454 DOI: 10.1016/j.jid.2023.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/05/2023] [Accepted: 10/25/2023] [Indexed: 02/03/2024]
Abstract
Type 2 immune-mediated diseases give a clear answer to the issue of nature (genetics) versus nurture (environment). Both genetics and environment play vital complementary roles in the development of atopic dermatitis (AD). As a key component of the atopic march, AD demonstrates the interactive nature of genetic and environmental contributions to atopy. From sequence variants in the epithelial barrier gene encoding FLG to the hygiene hypothesis, AD combines a broad array of contributions into a single syndrome. This review will focus on the genetic contribution to AD and where genetics facilitates the elicitation or enhancement of AD pathogenesis.
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Affiliation(s)
- Charles F Schuler
- Division of Allergy and Clinical Immunology, Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA; Mary H. Weiser Food Allergy Center, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Lam C Tsoi
- Mary H. Weiser Food Allergy Center, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA; Department of Dermatology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Allison C Billi
- Department of Dermatology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Paul W Harms
- Department of Dermatology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA; Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Stephan Weidinger
- Department of Dermatology, Venereology, and Allergology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Johann E Gudjonsson
- Mary H. Weiser Food Allergy Center, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA; Department of Dermatology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA.
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7
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Saheb Kashaf S, Kong HH. Adding Fuel to the Fire? The Skin Microbiome in Atopic Dermatitis. J Invest Dermatol 2024; 144:969-977. [PMID: 38530677 PMCID: PMC11034722 DOI: 10.1016/j.jid.2024.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 01/07/2024] [Indexed: 03/28/2024]
Abstract
Atopic dermatitis (AD) is a multifactorial, heterogeneous disease characterized by epidermal barrier dysfunction, immune system dysregulation, and skin microbiome alterations. Skin microbiome studies in AD have demonstrated that disease flares are associated with microbial shifts, particularly Staphylococcus aureus predominance. AD-associated S. aureus strains differ from those in healthy individuals across various genomic loci, including virulence factors, adhesion proteins, and proinflammatory molecules-which may contribute to complex microbiome barrier-immune system interactions in AD. Different microbially based treatments for AD have been explored, and their future therapeutic successes will depend on a deeper understanding of the potential microbial contributions to the disease.
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Affiliation(s)
- Sara Saheb Kashaf
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA; Pritzker School of Medicine, The University of Chicago, Chicago, Illinois, USA
| | - Heidi H Kong
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA.
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8
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Wu J, Li L, Zhang T, Lu J, Tai Z, Zhu Q, Chen Z. The epidermal lipid-microbiome loop and immunity: Important players in atopic dermatitis. J Adv Res 2024:S2090-1232(24)00088-2. [PMID: 38460775 DOI: 10.1016/j.jare.2024.03.001] [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: 05/27/2023] [Revised: 02/10/2024] [Accepted: 03/04/2024] [Indexed: 03/11/2024] Open
Abstract
BACKGROUND The promotion of epidermal barrier dysfunction is attributed to abnormalities in the lipid-microbiome positive feedback loop which significantly influences the imbalance of the epithelial immune microenvironment (EIME) in atopic dermatitis (AD). This imbalance encompasses impaired lamellar membrane integrity, heightened exposure to epidermal pathogens, and the regulation of innate and adaptive immunity. The lipid-microbiome loop is substantially influenced by intense adaptive immunity which is triggered by abnormal loop activity and affects the loop's integrity through the induction of atypical lipid composition and responses to dysregulated epidermal microbes. Immune responses participate in lipid abnormalities within the EIME by downregulating barrier gene expression and are further cascade-amplified by microbial dysregulation which is instigated by barrier impairment. AIM OF REVIEW This review examines the relationship between abnormal lipid composition, microbiome disturbances, and immune responses in AD while progressively substantiating the crosstalk mechanism among these factors. Based on this analysis, the "lipid-microbiome" positive feedback loop, regulated by immune responses, is proposed. KEY SCIENTIFIC CONCEPTS OF REVIEW The review delves into the impact of adaptive immune responses that regulate the EIME, driving AD, and investigates potential mechanisms by which lipid supplementation and probiotics may alleviate AD through the up-regulation of the epidermal barrier and modulation of immune signaling. This exploration offers support for targeting the EIME to attenuate AD.
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Affiliation(s)
- Junchao Wu
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Lisha Li
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Tingrui Zhang
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Jiaye Lu
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Zongguang Tai
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China; Shanghai Engineering Research Center for Topical Chinese Medicine, Shanghai, 200443, China.
| | - Quangang Zhu
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China; Shanghai Engineering Research Center for Topical Chinese Medicine, Shanghai, 200443, China.
| | - Zhongjian Chen
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China; Shanghai Engineering Research Center for Topical Chinese Medicine, Shanghai, 200443, China.
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9
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Minzaghi D, Pavel P, Kremslehner C, Gruber F, Oberreiter S, Hagenbuchner J, Del Frari B, Blunder S, Gruber R, Dubrac S. Excessive Production of Hydrogen Peroxide in Mitochondria Contributes to Atopic Dermatitis. J Invest Dermatol 2023; 143:1906-1918.e8. [PMID: 37085042 DOI: 10.1016/j.jid.2023.03.1680] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 03/07/2023] [Accepted: 03/30/2023] [Indexed: 04/23/2023]
Abstract
Atopic dermatitis (AD) is a complex disease characterized by chronic recurring eczema and pruritus. In addition, patients with AD display increased cutaneous and systemic levels of oxidative damage markers, whose source remains elusive. In this study, we investigated oxidative and mitochondrial stress in AD epidermis. The levels of superoxide dismutase 2 and hydrogen peroxide are augmented in the mitochondria of flaky tail (ft/ft) mouse keratinocytes, which is associated with the inhibition of the glutathione system and catalase. Furthermore, reduced levels of glutathione peroxidase 4 are associated with accumulation of malondialdehyde, 4-hydroxy-2-nonenal, and oxidized phosphatidylcholines in ft/ft epidermis. Cytochrome c is markedly increased in ft/ft epidermis, hence showing mitochondrial stress. Topical application of MitoQ, which is a mitochondrial-targeting antioxidant, to ft/ft mouse skin reduced damage to macromolecules and inflammation and restored epidermal homeostasis. Absence of alteration in the expression of superoxide dismutase 2, catalase, and glutathione peroxidase 4 and limited lipid peroxidation as well as oxidized phosphatidylcholines in the epidermis of Flg-/- mice suggest that FLG deficiency marginally contributes to oxidative stress in ft/ft epidermis. Increased superoxide dismutase 2, lipid peroxidation, and cytochrome c in the epidermis of patients with AD, associated with reduced antioxidant response in primary AD keratinocytes, corroborate mitochondrial dysfunction and lack of cellular adjustment to oxidative stress in AD epidermis.
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Affiliation(s)
- Deborah Minzaghi
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Petra Pavel
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Florian Gruber
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Sophie Oberreiter
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Barbara Del Frari
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefan Blunder
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Robert Gruber
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Sandrine Dubrac
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria.
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10
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Lei J, Yoshimoto RU, Matsui T, Amagai M, Kido MA, Tominaga M. Involvement of skin TRPV3 in temperature detection regulated by TMEM79 in mice. Nat Commun 2023; 14:4104. [PMID: 37474531 PMCID: PMC10359276 DOI: 10.1038/s41467-023-39712-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 06/19/2023] [Indexed: 07/22/2023] Open
Abstract
TRPV3, a non-selective cation transient receptor potential (TRP) ion channel, is activated by warm temperatures. It is predominantly expressed in skin keratinocytes, and participates in various somatic processes. Previous studies have reported that thermosensation in mice lacking TRPV3 was impaired. Here, we identified a transmembrane protein, TMEM79, that acts as a negative regulator of TRPV3. Heterologous expression of TMEM79 was capable of suppressing TRPV3-mediated currents in HEK293T cells. In addition, TMEM79 modulated TRPV3 translocalization and promoted its degradation in the lysosomes. TRPV3-mediated currents and Ca2+ influx were potentiated in primary mouse keratinocytes lacking TMEM79. Furthermore, TMEM79-deficient male mice preferred a higher temperature than did wild-type mice due to elevated TRPV3 function. Our study revealed unique interactions between TRPV3 and TMEM79, both in vitro and in vivo. These findings support roles for TMEM79 and TRPV3 in thermosensation.
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Affiliation(s)
- Jing Lei
- Division of Cell Signaling, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 444-8787, Okazaki, Japan
- Department of Physiological Sciences, The Graduate University for Advanced Studies (SOKENDAI), 444-8585, Okazaki, Japan
- Thermal Biology Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, 444-8787, Okazaki, Japan
| | - Reiko U Yoshimoto
- Division of Histology and Neuroanatomy, Department of Anatomy and Physiology, Faculty of Medicine, Saga University, 849-8501, Saga, Japan
| | - Takeshi Matsui
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, 230-0045, Yokohama, Japan
- Laboratory for Evolutionary Cell Biology of the Skin, School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji, 192-0982, Tokyo, Japan
- Department of Dermatology, Keio University School of Medicine, 160-8582, Tokyo, Japan
| | - Masayuki Amagai
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, 230-0045, Yokohama, Japan
- Department of Dermatology, Keio University School of Medicine, 160-8582, Tokyo, Japan
| | - Mizuho A Kido
- Division of Histology and Neuroanatomy, Department of Anatomy and Physiology, Faculty of Medicine, Saga University, 849-8501, Saga, Japan
| | - Makoto Tominaga
- Division of Cell Signaling, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 444-8787, Okazaki, Japan.
- Department of Physiological Sciences, The Graduate University for Advanced Studies (SOKENDAI), 444-8585, Okazaki, Japan.
- Thermal Biology Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, 444-8787, Okazaki, Japan.
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11
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Han J, Cai X, Qin S, Zhang Z, Wu Y, Shi Y, Deng T, Chen B, Liu L, Qian H, Fang W, Xiao F. TMEM232 promotes the inflammatory response in atopic dermatitis via the nuclear factor-κB and signal transducer and activator of transcription 3 signalling pathways. Br J Dermatol 2023; 189:195-209. [PMID: 36928730 DOI: 10.1093/bjd/ljad078] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 03/11/2023] [Accepted: 03/12/2023] [Indexed: 03/18/2023]
Abstract
BACKGROUND Our group previously found that the transmembrane protein 232 (TMEM232) gene was associated with atopic dermatitis (AD) by genome-wide association study and fine mapping study. However, its function is unclear so far. OBJECTIVES To investigate the roles and mechanisms of TMEM232 in AD. METHODS The expression of TMEM232 was investigated in skin lesions of patients with AD, the MC903-induced AD mouse model, human primary keratinocytes and immortalized human keratinocyte cell line (HaCaT) cells stimulated with different inflammatory factors. The role of TMEM232 in AD was analysed in HaCaT cells and Tmem232 knockout (Tmem232-/-) mice. Tmem232-specific small interfering RNA (siRNA) was used to evaluate its therapeutic potential in the AD mouse model. RESULTS The expression of TMEM232 was significantly increased in skin lesions of patients with AD, the MC903-induced AD mouse model and human primary keratinocytes and HaCaT cells stimulated with different inflammatory factors compared with controls. In the presence of MC903, Tmem232-/- mice exhibited significantly reduced dermatitis severity, mast-cell infiltration in the back, and expression of T-helper (Th)1 and Th2-related inflammatory factors in skin tissue compared with wild-type mice. In vitro and in vivo experiments further showed that upregulation of TMEM232 in AD exacerbated the inflammation response through activating the pathway of nuclear factor-κB and signal transducer and activator of transcription (STAT) 3, and was regulated by the interleukin-4/STAT6 axis, which formed a self-amplifying loop. Finally, topical application of Tmem232 siRNA markedly ameliorated AD-like lesions in the AD model. CONCLUSIONS This study is the first to outline the function of TMEM232. It is involved in regulating inflammation in AD and may be a potential target for AD treatment.
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Affiliation(s)
- Jie Han
- Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology
- Key Laboratory of Dermatology (Ministry of Education)
| | - Xinying Cai
- Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology
- Key Laboratory of Dermatology (Ministry of Education)
| | - Shichun Qin
- Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology
- Key Laboratory of Dermatology (Ministry of Education)
| | - Zengyunou Zhang
- Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology
- Key Laboratory of Dermatology (Ministry of Education)
| | - Yuanyuan Wu
- Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology
- Key Laboratory of Dermatology (Ministry of Education)
| | - Yuanzhe Shi
- Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology
- Key Laboratory of Dermatology (Ministry of Education)
| | - Tingyue Deng
- Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology
- Key Laboratory of Dermatology (Ministry of Education)
| | - Benjin Chen
- School of Biomedical Engineering, Research and Engineering Center of Biomedical Materials, Anhui Provincial Institute of Translational Medicine
| | - Li Liu
- The Center for Scientific Research of Anhui Medical University, Hefei, Anhui, China
| | - Haisheng Qian
- School of Biomedical Engineering, Research and Engineering Center of Biomedical Materials, Anhui Provincial Institute of Translational Medicine
| | | | - Fengli Xiao
- Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology
- Key Laboratory of Dermatology (Ministry of Education)
- The Center for Scientific Research of Anhui Medical University, Hefei, Anhui, China
- Laboratory of Inflammatory and Immune Diseases, Hefei, Anhui, China
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12
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Epicutaneous Sensitization and Food Allergy: Preventive Strategies Targeting Skin Barrier Repair-Facts and Challenges. Nutrients 2023; 15:nu15051070. [PMID: 36904070 PMCID: PMC10005101 DOI: 10.3390/nu15051070] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/16/2023] [Accepted: 02/18/2023] [Indexed: 02/25/2023] Open
Abstract
Food allergy represents a growing public health and socio-economic problem with an increasing prevalence over the last two decades. Despite its substantial impact on the quality of life, current treatment options for food allergy are limited to strict allergen avoidance and emergency management, creating an urgent need for effective preventive strategies. Advances in the understanding of the food allergy pathogenesis allow to develop more precise approaches targeting specific pathophysiological pathways. Recently, the skin has become an important target for food allergy prevention strategies, as it has been hypothesized that allergen exposure through the impaired skin barrier might induce an immune response resulting in subsequent development of food allergy. This review aims to discuss current evidence supporting this complex interplay between the skin barrier dysfunction and food allergy by highlighting the crucial role of epicutaneous sensitization in the causality pathway leading to food allergen sensitization and progression to clinical food allergy. We also summarize recently studied prophylactic and therapeutic interventions targeting the skin barrier repair as an emerging food allergy prevention strategy and discuss current evidence controversies and future challenges. Further studies are needed before these promising strategies can be routinely implemented as prevention advice for the general population.
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13
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Chong AC, Visitsunthorn K, Ong PY. Genetic/Environmental Contributions and Immune Dysregulation in Children with Atopic Dermatitis. J Asthma Allergy 2022; 15:1681-1700. [PMID: 36447957 PMCID: PMC9701514 DOI: 10.2147/jaa.s293900] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 11/11/2022] [Indexed: 08/01/2023] Open
Abstract
Atopic dermatitis (AD) is one of the most common skin conditions in humans. AD affects up to 20% of children worldwide and results in morbidity for both patients and their caregivers. The basis of AD is an interplay between genetics and the environment characterized by immune dysregulation. A myriad of mutations that compromise the skin barrier and/or immune function have been linked to AD. Of these, filaggrin gene (FLG) mutations are the most evidenced. Many other mutations have been implicated in isolated studies that are often unreplicated, creating an archive of genes with potential but unconfirmed relevance to AD. Harnessing big data, polygenic risk scores (PRSs) and genome-wide association studies (GWAS) may provide a more practical strategy for identifying the genetic signatures of AD. Epigenetics may also play a role. Staphylococcus aureus is the most evidenced microbial contributor to AD. Cutaneous dysbiosis may result in over-colonization by pathogenic strains and aberrant skin immunity and inflammation. Aeroallergens, air pollution, and climate are other key environmental contributors to AD. The right climate and/or commensals may improve AD for some patients.
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Affiliation(s)
- Albert C Chong
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | | | - Peck Y Ong
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Pediatrics, Children’s Hospital Los Angeles, Los Angeles, CA, USA
- Division of Clinical Immunology and Allergy, Children’s Hospital Los Angeles, Los Angeles, CA, USA
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14
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Zhang P, Liu L, Lai X, Chen R, Guo Y, JunjieMa, Chen W, Chen Z. Ablation of Basic Leucine Zipper Transcription Factor ATF-Like Potentiates Estradiol to Induce Atopic Dermatitis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:7024669. [PMID: 36160706 PMCID: PMC9507764 DOI: 10.1155/2022/7024669] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/26/2022] [Accepted: 09/02/2022] [Indexed: 01/23/2023]
Abstract
Background Atopic dermatitis (AD) is an inflammatory and immune skin disorder. Basic leucine zipper transcription factor ATF-like (BATF) plays a key role in regulating the differentiation and functions of lymphocytes. However, the mechanism underlying the transcriptional regulation of BATF on AD is still not well understood. Methods BATF knockout (BATF-/-) and C57BL/6(B6) mice were used for the development of spontaneous dermatitis. 17β-Estradiol was injected intraperitoneally to induce AD. The lesioned tail skin of the mice was stained with hematoxylin and eosin to analyze the pathological characteristics. Impaired skin barrier function was assessed by measuring the transepidermal water loss (TEWL). The skin epithelial barrier indicators and cytokine mRNA levels were quantified by real-time quantitative PCR. The total serum immunoglobulin E (IgE) levels were measured by enzyme-linked immunosorbent assay (ELISA). T lymphocytes were analyzed using flow cytometry. Results Ablation of BATF led to the spontaneous development of AD only in female mice and not in male mice. BATF deletion led to elevated serum levels of IgE and increased infiltration of eosinophils, neutrophils, and lymphocytes and promoted cytokine production including IL-4, IL-22, IL-1β, IFN-γ, and TNF-α in the lesioned tail skin of the mice. The mRNA expression levels of filaggrin and loricrin significantly decreased, while S100A8 and S100A9 increased in female BATF-/- mice. BATF-deficient female mice were found to increase proliferation and IL-5 production by skin-infiltrating CD4+ T cells which implies Th2 activation. Moreover, AD was successfully induced only in the estradiol-treated BATF-deficient male mice and not in WT male mice. Estradiol enhanced the allergic and immunological responses to dermatitis primarily by triggering Th2-type immune responses via enhanced serum IgE and inflammatory cytokine levels in the male BATF-/- mice. Conclusion The study concluded that BATF potentiates estradiol to induce mouse atopic dermatitis via potentiating inflammatory cytokine releases and Th2-type immune responses and may have important clinical implications for patients with AD.
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Affiliation(s)
- Peng Zhang
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 511447 Guangdong, China
| | - Luhao Liu
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 511447 Guangdong, China
| | - Xingqiang Lai
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 511447 Guangdong, China
| | - Rongxin Chen
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 511447 Guangdong, China
| | - Yuhe Guo
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 511447 Guangdong, China
| | - JunjieMa
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 511447 Guangdong, China
| | - Wenhao Chen
- Immunobiology & Transplant Science Center, Houston Methodist Research Institute, Texas Medical Center, Houston, TX 77030, USA
| | - Zheng Chen
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, 511447 Guangdong, China
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15
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Gonzalez-Visiedo M, Li X, Munoz-Melero M, Kulis MD, Daniell H, Markusic DM. Single-dose AAV vector gene immunotherapy to treat food allergy. Mol Ther Methods Clin Dev 2022; 26:309-322. [PMID: 35990748 PMCID: PMC9361215 DOI: 10.1016/j.omtm.2022.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 07/12/2022] [Indexed: 11/13/2022]
Abstract
Immunotherapies for patients with food allergy have shown some success in limiting allergic responses. However, these approaches require lengthy protocols with repeated allergen dosing and patients can relapse following discontinuation of treatment. The purpose of this study was to test if a single dose of an adeno-associated virus (AAV) vector can safely prevent and treat egg allergy in a mouse model. AAV vectors expressing ovalbumin (OVA) under an ubiquitous or liver-specific promoter were injected prior to or after epicutaneous sensitization with OVA. Mice treated with either AAV8-OVA vector were completely protected from allergy sensitization. These animals had a significant reduction in anaphylaxis mediated by a reduction in OVA-specific IgE titers. In mice with established OVA allergy, allergic responses were mitigated only in mice treated with an AAV8-OVA vector expressing OVA from an ubiquitous promoter. In conclusion, an AAV vector with a liver-specific promoter was more effective for allergy prevention, but higher OVA levels were necessary for reducing symptoms in preexisting allergy. Overall, our AAV gene immunotherapy resulted in an expansion of OVA-specific FoxP3+ CD4+ T cells, an increase in the regulatory cytokine IL-10, and a reduction in the IgE promoting cytokine IL-13.
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Affiliation(s)
- Miguel Gonzalez-Visiedo
- Department of Pediatrics, Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 West Walnut Street, R4-155, Indianapolis, IN 46202, USA
| | - Xin Li
- Department of Pediatrics, Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 West Walnut Street, R4-155, Indianapolis, IN 46202, USA
| | - Maite Munoz-Melero
- Department of Pediatrics, Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 West Walnut Street, R4-155, Indianapolis, IN 46202, USA
| | - Michael D Kulis
- Department of Pediatrics, Division of Allergy and Immunology, School of Medicine, University of North Carolina, Chapel Hill, Chapel Hill, NC 27599, USA
| | - Henry Daniell
- Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - David M Markusic
- Department of Pediatrics, Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 West Walnut Street, R4-155, Indianapolis, IN 46202, USA
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16
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Cook-Mills JM, Emmerson LN. Epithelial barrier regulation, antigen sampling, and food allergy. J Allergy Clin Immunol 2022; 150:493-502. [DOI: 10.1016/j.jaci.2022.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/20/2022] [Accepted: 06/30/2022] [Indexed: 10/15/2022]
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17
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Sanjel B, Shim WS. The contribution of mouse models to understanding atopic dermatitis. Biochem Pharmacol 2022; 203:115177. [PMID: 35843300 DOI: 10.1016/j.bcp.2022.115177] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 07/08/2022] [Accepted: 07/11/2022] [Indexed: 12/28/2022]
Abstract
Atopic dermatitis (AD) is a dermatological disease accompanied by dry and cracked skin with severe pruritus. Although various therapeutic strategies have been introduced to alleviate AD, it remains challenging to cure the disorder. To achieve such a goal, understanding the pathophysiological mechanisms of AD is a prerequisite, requiring mouse models that properly reflect the AD phenotypes. Currently, numerous AD mouse models have been established, but each model has its own advantages and weaknesses. In this review, we categorized and summarized mouse models of AD and described their characteristics from a researcher's perspective.
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Affiliation(s)
- Babina Sanjel
- College of Pharmacy, Gachon University, Hambangmoero 191, Yeonsu-gu, Incheon 21936, Republic of Korea; Gachon Institute of Pharmaceutical Sciences, Hambangmoero 191, Yeonsu-gu, Incheon 21936, Republic of Korea
| | - Won-Sik Shim
- College of Pharmacy, Gachon University, Hambangmoero 191, Yeonsu-gu, Incheon 21936, Republic of Korea; Gachon Institute of Pharmaceutical Sciences, Hambangmoero 191, Yeonsu-gu, Incheon 21936, Republic of Korea.
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18
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Ma X, Ru Y, Luo Y, Kuai L, Chen QL, Bai Y, Liu YQ, Chen J, Luo Y, Song JK, Zhou M, Li B. Post-Translational Modifications in Atopic Dermatitis: Current Research and Clinical Relevance. Front Cell Dev Biol 2022; 10:942838. [PMID: 35874824 PMCID: PMC9301047 DOI: 10.3389/fcell.2022.942838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 06/16/2022] [Indexed: 11/20/2022] Open
Abstract
Atopic dermatitis (AD) is a chronic and relapsing cutaneous disorder characterized by compromised immune system, excessive inflammation, and skin barrier disruption. Post-translational modifications (PTMs) are covalent and enzymatic modifications of proteins after their translation, which have been reported to play roles in inflammatory and allergic diseases. However, less attention has been paid to the effect of PTMs on AD. This review summarized the knowledge of six major classes (including phosphorylation, acetylation, ubiquitination, SUMOylation, glycosylation, o-glycosylation, and glycation) of PTMs in AD pathogenesis and discussed the opportunities for disease management.
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Affiliation(s)
- Xin Ma
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Shanghai Skin Disease Hospital of Tongji University, Shanghai, China
| | - Yi Ru
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
| | - Ying Luo
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
| | - Le Kuai
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
| | - Qi-Long Chen
- Shanghai Skin Disease Hospital of Tongji University, Shanghai, China
| | - Yun Bai
- Shanghai Skin Disease Hospital of Tongji University, Shanghai, China
| | - Ye-Qiang Liu
- Shanghai Skin Disease Hospital of Tongji University, Shanghai, China
| | - Jia Chen
- Shanghai Skin Disease Hospital of Tongji University, Shanghai, China
| | - Yue Luo
- Shanghai Skin Disease Hospital of Tongji University, Shanghai, China
| | - Jian-Kun Song
- Shanghai Skin Disease Hospital of Tongji University, Shanghai, China
| | - Mi Zhou
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Mi Zhou, ; Bin Li,
| | - Bin Li
- Shanghai Skin Disease Hospital of Tongji University, Shanghai, China
- Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Mi Zhou, ; Bin Li,
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19
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Morimoto A, Fukuda K, Ito Y, Tahara U, Sasaki T, Shiohama A, Kawasaki H, Kawakami E, Naganuma T, Arita M, Sasaki H, Koseki H, Matsui T, Amagai M. Microbiota-Independent Spontaneous Dermatitis Associated With Increased Sebaceous Lipid Production in Tmem79-Deficient Mice. J Invest Dermatol 2022; 142:2864-2872.e6. [PMID: 35752300 DOI: 10.1016/j.jid.2022.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/28/2022] [Accepted: 06/07/2022] [Indexed: 11/19/2022]
Abstract
TMEM79 is a predisposing gene for atopic dermatitis (AD). Tmem79-deficient mice develop spontaneous dermatitis in a biphasic pattern. The 1st-phase dermatitis is unique, as it occurs independent of microbiota status, whereas the 2nd-phase dermatitis is microbiota-dependent. In this study, we sought to identify key factors mediating the development of 1st-phase dermatitis. Structural analysis showed that sebaceous gland hyperplasia started from 1st-phase dermatitis. Longitudinal RNA-sequencing analysis revealed significant activation of fatty acid lipid-metabolism pathways in 1st-phase dermatitis, whereas Th17-based immune response genes were highly expressed in 2nd-phase dermatitis. Quantitative reverse transcription-polymerase chain reaction analysis revealed that genes involved in fatty acid elongation and sebocyte differentiation were upregulated in 1st-phase dermatitis. The results of thin-layer chromatography supported these findings with an increased abundance of wax esters, cholesterol esters, and fatty alcohols in hair lipids. Further gas chromatography-tandem mass spectrometry analysis showed an increase in total fatty acid production, including that of elongated C20-24 saturated and C18-24 mono-unsaturated fatty acids. Collectively, these results suggest that aberrant production of sebaceous long-chain fatty acids is associated with microbiota-independent dermatitis. Further investigation of Tmem79-deficient mice may clarify the role of certain fatty acids in dermatitis.
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Affiliation(s)
- Ari Morimoto
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Keitaro Fukuda
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Yoshihiro Ito
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Umi Tahara
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Takashi Sasaki
- Center for Supercentenarian Medical Research, Keio University School of Medicine, Tokyo, Japan
| | - Aiko Shiohama
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
| | - Hiroshi Kawasaki
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan; Laboratory for Developmental Genetics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Eiryo Kawakami
- Advanced Data Science Project, RIKEN Information R&D and Strategy Headquarters, Yokohama, Japan; Artificial Intelligence Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Tatsuro Naganuma
- Division of Physiological Chemistry and Metabolism, Faculty of Pharmacy, Keio University, Tokyo, Japan; Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Makoto Arita
- Division of Physiological Chemistry and Metabolism, Faculty of Pharmacy, Keio University, Tokyo, Japan; Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Hiroyuki Sasaki
- Department of Occupational Therapy, School of Rehabilitation, Tokyo Professional University of Health Sciences, Tokyo, Japan
| | - Haruhiko Koseki
- Laboratory for Developmental Genetics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Takeshi Matsui
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan; Laboratory for Evolutionary Cell Biology of the Skin, School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Japan
| | - Masayuki Amagai
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan.
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20
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Hawerkamp HC, Fahy CMR, Fallon PG, Schwartz C. Break on through: The role of innate immunity and barrier defence in atopic dermatitis and psoriasis. SKIN HEALTH AND DISEASE 2022; 2:e99. [PMID: 35677926 PMCID: PMC9168024 DOI: 10.1002/ski2.99] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 01/07/2022] [Accepted: 01/23/2022] [Indexed: 12/20/2022]
Abstract
The human skin can be affected by a multitude of diseases including inflammatory conditions such as atopic dermatitis and psoriasis. Here, we describe how skin barrier integrity and immunity become dysregulated during these two most common inflammatory skin conditions. We summarise recent advances made in the field of the skin innate immune system and its interaction with adaptive immunity. We review gene variants associated with atopic dermatitis and psoriasis that affect innate immune mechanisms and skin barrier integrity. Finally, we discuss how current and future therapies may affect innate immune responses and skin barrier integrity in a generalized or more targeted approach in order to ameliorate disease in patients.
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Affiliation(s)
- H C Hawerkamp
- Trinity Biomedical Sciences Institute, School of Medicine, Trinity College Dublin Dublin Ireland
| | - C M R Fahy
- Paediatric Dermatology Children's Health Ireland at Crumlin Dublin Ireland.,Royal United Hospitals NHS Foundation Trust Bath UK
| | - P G Fallon
- Trinity Biomedical Sciences Institute, School of Medicine, Trinity College Dublin Dublin Ireland.,National Children's Research Centre Our Lady's Children's Hospital Dublin Ireland.,Clinical Medicine Trinity College Dublin Dublin Ireland
| | - C Schwartz
- Trinity Biomedical Sciences Institute, School of Medicine, Trinity College Dublin Dublin Ireland.,Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg Erlangen Germany.,Medical Immunology Campus Erlangen FAU Erlangen-Nürnberg Erlangen Germany
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21
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Maintz L, Bieber T, Simpson HD, Demessant-Flavigny AL. From Skin Barrier Dysfunction to Systemic Impact of Atopic Dermatitis: Implications for a Precision Approach in Dermocosmetics and Medicine. J Pers Med 2022; 12:jpm12060893. [PMID: 35743678 PMCID: PMC9225544 DOI: 10.3390/jpm12060893] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/20/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023] Open
Abstract
: Atopic dermatitis (AD) affects up to 20% of children and is considered the starting point of the atopic march with the development of food allergy, asthma, and allergic rhinitis. The heterogeneous phenotype reflects distinct and/or overlapping pathogenetic mechanisms with varying degrees of epidermal barrier disruption, activation of different T cell subsets and dysbiosis of the skin microbiome. Here, we review current evidence suggesting a systemic impact of the cutaneous inflammation in AD together with a higher risk of asthma and other comorbidities, especially in severe and persistent AD. Thus, early therapy of AD to restore the impaired skin barrier, modified microbiome, and target type 2 inflammation, depending on the (endo)phenotype, in a tailored approach is crucial. We discuss what we can learn from the comorbidities and the implications for preventive and therapeutic interventions from precision dermocosmetics to precision medicine. The stratification of AD patients into biomarker-based endotypes for a precision medicine approach offers opportunities for better long-term control of AD with the potential to reduce the systemic impact of a chronic skin inflammation and even prevent or modify the course, not only of AD, but possibly also the comorbidities, depending on the patient’s age and disease stage.
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Affiliation(s)
- Laura Maintz
- Department of Dermatology and Allergy, University Hospital Bonn, 53127 Bonn, Germany;
- Christine Kühne Center for Allergy Research and Education Davos (CK-CARE), 7265 Davos, Switzerland
- Correspondence: ; Tel.: +49-228-287-16898
| | - Thomas Bieber
- Department of Dermatology and Allergy, University Hospital Bonn, 53127 Bonn, Germany;
- Christine Kühne Center for Allergy Research and Education Davos (CK-CARE), 7265 Davos, Switzerland
- Davos Biosciences, Herman-Burchard-Str. 9, CH-7265 Davos Wolfgang, Switzerland
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22
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Moosbrugger-Martinz V, Leprince C, Méchin MC, Simon M, Blunder S, Gruber R, Dubrac S. Revisiting the Roles of Filaggrin in Atopic Dermatitis. Int J Mol Sci 2022; 23:5318. [PMID: 35628125 PMCID: PMC9140947 DOI: 10.3390/ijms23105318] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/03/2022] [Accepted: 05/06/2022] [Indexed: 12/31/2022] Open
Abstract
The discovery in 2006 that loss-of-function mutations in the filaggrin gene (FLG) cause ichthyosis vulgaris and can predispose to atopic dermatitis (AD) galvanized the dermatology research community and shed new light on a skin protein that was first identified in 1981. However, although outstanding work has uncovered several key functions of filaggrin in epidermal homeostasis, a comprehensive understanding of how filaggrin deficiency contributes to AD is still incomplete, including details of the upstream factors that lead to the reduced amounts of filaggrin, regardless of genotype. In this review, we re-evaluate data focusing on the roles of filaggrin in the epidermis, as well as in AD. Filaggrin is important for alignment of keratin intermediate filaments, control of keratinocyte shape, and maintenance of epidermal texture via production of water-retaining molecules. Moreover, filaggrin deficiency leads to cellular abnormalities in keratinocytes and induces subtle epidermal barrier impairment that is sufficient enough to facilitate the ingress of certain exogenous molecules into the epidermis. However, although FLG null mutations regulate skin moisture in non-lesional AD skin, filaggrin deficiency per se does not lead to the neutralization of skin surface pH or to excessive transepidermal water loss in atopic skin. Separating facts from chaff regarding the functions of filaggrin in the epidermis is necessary for the design efficacious therapies to treat dry and atopic skin.
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Affiliation(s)
- Verena Moosbrugger-Martinz
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (V.M.-M.); (S.B.); (R.G.)
| | - Corinne Leprince
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), Toulouse University, CNRS UMR5051, Inserm UMR1291, UPS, 31059 Toulouse, France; (C.L.); (M.-C.M.); (M.S.)
| | - Marie-Claire Méchin
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), Toulouse University, CNRS UMR5051, Inserm UMR1291, UPS, 31059 Toulouse, France; (C.L.); (M.-C.M.); (M.S.)
| | - Michel Simon
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), Toulouse University, CNRS UMR5051, Inserm UMR1291, UPS, 31059 Toulouse, France; (C.L.); (M.-C.M.); (M.S.)
| | - Stefan Blunder
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (V.M.-M.); (S.B.); (R.G.)
| | - Robert Gruber
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (V.M.-M.); (S.B.); (R.G.)
| | - Sandrine Dubrac
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria; (V.M.-M.); (S.B.); (R.G.)
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23
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Maiello N, Comberiati P, Giannetti A, Ricci G, Carello R, Galli E. New Directions in Understanding Atopic March Starting from Atopic Dermatitis. CHILDREN (BASEL, SWITZERLAND) 2022; 9:children9040450. [PMID: 35455494 PMCID: PMC9029734 DOI: 10.3390/children9040450] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 03/20/2022] [Accepted: 03/21/2022] [Indexed: 01/12/2023]
Abstract
Recent evidence showed that the postulated linear progression of the atopic march, from atopic dermatitis to food and respiratory allergies, does not capture the heterogeneity of allergic phenotypes, which are influenced by complex interactions between environmental, genetic, and psychosocial factors. Indeed, multiple atopic trajectories are possible in addition to the classic atopic march. Nevertheless, atopic dermatitis is often the first manifestation of an atopic march. Improved understanding of atopic dermatitis pathogenesis is warranted as this could represent a turning point in the prevention of atopic march. In this review, we outline the recent findings on the pathogenetic mechanisms leading to atopic dermatitis that could be targeted by intervention strategies for the prevention of atopic march.
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Affiliation(s)
- Nunzia Maiello
- Department of Woman, Child and General and Specialized Surgery, University of Campania “Luigi Vanvitelli”, 81100 Naples, Italy
- Correspondence:
| | - Pasquale Comberiati
- Department of Clinical and Experimental Medicine, Section of Pediatrics, University of Pisa, 56126 Pisa, Italy;
- Department of Clinical Immunology and Allergology, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Arianna Giannetti
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy;
| | - Giampaolo Ricci
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy;
| | - Rossella Carello
- Pediatric Allergic Unit, S.Pietro Hospital FbF Roma, 00189 Rome, Italy; (R.C.); (E.G.)
| | - Elena Galli
- Pediatric Allergic Unit, S.Pietro Hospital FbF Roma, 00189 Rome, Italy; (R.C.); (E.G.)
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24
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You M, Wang Z, Kim HJ, Lee YH, Kim HA. Pear pomace alleviated atopic dermatitis in NC/Nga mice and inhibited LPS-induced inflammation in RAW 264.7 macrophages. Nutr Res Pract 2022; 16:577-588. [PMID: 36238377 PMCID: PMC9523206 DOI: 10.4162/nrp.2022.16.5.577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/07/2021] [Accepted: 11/25/2021] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND/OBJECTIVES Poorly regulated inflammation is believed to be the most predominant factor that can result in a wide scope of diseases including atopic dermatitis (AD). Despite many studies on the effect of pear pomace in obesity-related disorders including dysregulated gut microbiota, the protective effect of pear pomace in AD is still unknown. This study aimed to evaluate the effect of pear pomace ethanol extract (PPE) on AD by inhibiting inflammation. MATERIALS/METHODS In the in vivo experiment, 2, 4-dinitrochlorobenzene (DNCB) was applied to NC/Nga mice to induce AD-like skin lesions. After the induction, PPE was administered daily by oral gavage for 4 weeks. The clinical severity score, serum IgE levels, spleen weight, histological changes in dorsal skin, and inflammation-related proteins were measured. In the cell study, RAW 264.7 cells were pretreated with PPE before stimulation with lipopolysaccharide (LPS). Nitrite oxide (NO) production and nuclear factor kappa B (NF-kB) protein expression were detected. RESULTS Compared to the AD control (AD-C) group, IgE levels were dramatically decreased via PPE treatment. PPE significantly reduced scratching behavior, improved skin symptoms, and decreased ear thickness compared to the AD-C group. In addition, PPE inhibited the DNCB-induced expression of inducible nitrite oxide synthase (iNOS), the receptor for advanced glycation end products, extracellular signal-regulated kinase (ERK) 1/2, and NF-κB. PPE inhibited the LPS-induced overproduction of NO and the enhanced expression of iNOS and cyclooxygenase-2. Moreover, the phosphorylation of ERK1/2 and NF-κB in RAW 264.7 cells was suppressed by PPE. CONCLUSIONS These results suggest that PPE could be explored as a therapeutic agent to prevent AD.
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Affiliation(s)
- Mikyoung You
- Nutrition Research Institute, University of North Carolina, Chapel Hill, NC 28081, USA
| | - Ziyun Wang
- Department of Food and Nutrition, Mokpo National University, Muan 58554, Korea
| | - Hwa-Jin Kim
- Department of Food and Nutrition, Mokpo National University, Muan 58554, Korea
| | - Young-Hyun Lee
- Department of Food and Nutrition, Mokpo National University, Muan 58554, Korea
| | - Hyeon-A Kim
- Department of Food and Nutrition, Mokpo National University, Muan 58554, Korea
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25
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Yoshida T, Beck LA, De Benedetto A. Skin barrier defects in atopic dermatitis: From old idea to new opportunity. Allergol Int 2022; 71:3-13. [PMID: 34916117 PMCID: PMC8934597 DOI: 10.1016/j.alit.2021.11.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 11/22/2021] [Indexed: 01/31/2023] Open
Abstract
Atopic dermatitis (AD) is the most common chronic skin inflammatory disease, with a profound impact on patients’ quality of life. AD varies considerably in clinical course, age of onset and degree to which it is accompanied by allergic and non-allergic comorbidities. Skin barrier impairment in both lesional and nonlesional skin is now recognized as a critical and often early feature of AD. This may be explained by a number of abnormalities identified within both the stratum corneum and stratum granulosum layers of the epidermis. The goal of this review is to provide an overview of key barrier defects in AD, starting with a historical perspective. We will also highlight some of the commonly used methods to characterize and quantify skin barrier function. There is ample opportunity for further investigative work which we call out throughout this review. These include: quantifying the relative impact of individual epidermal abnormalities and putting this in a more holistic view with physiological measures of barrier function, as well as determining whether these barrier-specific endotypes predict clinical phenotypes (e.g. age of onset, natural history, comorbidities, response to therapies, etc). Mechanistic studies with new (and in development) AD therapies that specifically target immune pathways, Staphylococcus aureus abundance and/or skin barrier will help us understand the dynamic crosstalk between these compartments and their relative importance in AD.
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26
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Ishitsuka Y, Roop DR. The Epidermis: Redox Governor of Health and Diseases. Antioxidants (Basel) 2021; 11:47. [PMID: 35052551 PMCID: PMC8772843 DOI: 10.3390/antiox11010047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 12/25/2021] [Indexed: 12/13/2022] Open
Abstract
A functional epithelial barrier necessitates protection against dehydration, and ichthyoses are caused by defects in maintaining the permeability barrier in the stratum corneum (SC), the uppermost protective layer composed of dead cells and secretory materials from the living layer stratum granulosum (SG). We have found that loricrin (LOR) is an essential effector of cornification that occurs in the uppermost layer of SG (SG1). LOR promotes the maturation of corneocytes and extracellular adhesion structure through organizing disulfide cross-linkages, albeit being dispensable for the SC permeability barrier. This review takes psoriasis and AD as the prototype of impaired cornification. Despite exhibiting immunological traits that oppose each other, both conditions share the epidermal differentiation complex as a susceptible locus. We also review recent mechanistic insights on skin diseases, focusing on the Kelch-like erythroid cell-derived protein with the cap "n" collar homology-associated protein 1/NFE2-related factor 2 signaling pathway, as they coordinate the epidermis-intrinsic xenobiotic metabolism. Finally, we refine the theoretical framework of thiol-mediated crosstalk between keratinocytes and leukocytes in the epidermis that was put forward earlier.
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Affiliation(s)
- Yosuke Ishitsuka
- Department of Dermatology Integrated Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Dennis R. Roop
- Charles C. Gates Center for Regenerative Medicine, Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
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27
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Stevens ML, Mersha TB, Zhang Z, Kothari A, Khurana Hershey GK. Skin depletion of Kif3a resembles the pediatric atopic dermatitis transcriptome profile. Hum Mol Genet 2021; 31:1588-1598. [PMID: 34964466 DOI: 10.1093/hmg/ddab342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 11/12/2022] Open
Abstract
Skin deficiency of kinesin family member 3A causes disrupted skin barrier function and promotes development of atopic dermatitis (AD). It is not known how well Kif3aK14∆/∆ mice approximate the human AD transcriptome. To determine the skin transcriptomic profile of Kif3aK14∆/∆ mice and compare it with other murine AD models and human AD, we performed RNA-seq of full-thickness skin and epidermis from 3- and 8-week-old Kif3aK14∆/∆ mice and compared the differentially expressed genes (DEGs) with transcriptomic datasets from mite-induced NC/Nga, flaky tail (Tmem79ma/ma Flgft/ft), and filaggrin-mutant (Flgft/ft) mice, as well as human AD transcriptome datasets including meta-analysis derived atopic dermatitis [MADAD] and the pediatric atopic dermatitis [PAD]. We then interrogated the Kif3aK14∆/∆ skin DEGs using the LINCS-L1000 database to identify potential novel drug targets for AD treatment. We identified 471 and 901 DEGs at 3 and 8 weeks of age, respectively, in the absence of Kif3a. Kif3aK14∆/∆ mice had 3.5-4.5 times more DEGs that overlapped with human AD DEGs compared to the flaky tail and Flgft/ft mice. Further, 55%, 85% and 75% of 8-week Kif3aK14∆/∆ DEGs overlapped with the MADAD and PAD non-lesional and lesional gene lists, respectively. Kif3aK14∆/∆ mice spontaneously develop a human AD-like gene signature, which better represents pediatric non-lesional skin compared to other mouse models including flaky tail, Flgft/ft and NC/Nga. Thus, Kif3aK14∆/∆ mice may model pediatric skin that is a precursor to the development of lesions and inflammation, and hence may be a useful model to study AD pathogenesis.
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Affiliation(s)
- Mariana L Stevens
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | - Tesfaye B Mersha
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | - Zhonghua Zhang
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | - Arjun Kothari
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | - Gurjit K Khurana Hershey
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
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28
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Confirming the TMEM232 gene associated with atopic dermatitis through targeted capture sequencing. Sci Rep 2021; 11:21830. [PMID: 34750414 PMCID: PMC8576034 DOI: 10.1038/s41598-021-01194-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 10/19/2021] [Indexed: 11/08/2022] Open
Abstract
Atopic dermatitis (AD) is a common and complex skin disorder, and the 5q22.1 region had been reported to be associated with AD. To confirm the susceptibility gene for AD in the 5q22.1 region by haplotype and targeted capture sequencing. The haplotypes were reconstructed with the genotyping data of four SNPs and six deletions from 3624 Chinese Hans AD patients and 5076 controls. The targeted capture sequencing spanning 5q22.1 region was performed in the selected samples. The gene level enrichment analysis was done using loss of function variants. A total of 62 haplotypes were found, and the H15 haplotype had the strongest association with AD (P = 3.92 × 10-10, OR 0.17, 95% CI 0.09-0.32). However, no co-segregation mutation sites were found in the sequencing analysis within the 16 selected samples, while the enrichment analysis indicated that TMEM232 was significantly associated with AD (P = 7.33 × 10-5, OR 0.33, 95% CI 0.19-0.58). This study confirms previous findings that the TMEM232 gene is associated with AD by haplotype analysis and targeted capture sequencing.
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29
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Buelow LM, Hoji A, Tat K, Schroeder-Carter LM, Carroll DJ, Cook-Mills JM. Mechanisms for Alternaria alternata Function in the Skin During Induction of Peanut Allergy in Neonatal Mice With Skin Barrier Mutations. FRONTIERS IN ALLERGY 2021; 2:677019. [PMID: 35387035 PMCID: PMC8974772 DOI: 10.3389/falgy.2021.677019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 08/16/2021] [Indexed: 01/07/2023] Open
Abstract
Neonatal mice with heterozygous mutations in genes encoding the skin barrier proteins filaggrin and mattrin (flaky tail mice [FT+/-]) exhibit oral peanut-induced anaphylaxis after skin sensitization. As we have previously reported, sensitization in this model is achieved via skin co- exposure to the environmental allergen Alternaria alternata (Alt), peanut extract (PNE), and detergent. However, the function of Alt in initiation of peanut allergy in this model is little understood. The purpose of this study was to investigate candidate cytokines induced by Alt in the skin and determine the role of these cytokines in the development of food allergy, namely oncostatin M (Osm), amphiregulin (Areg), and IL-33. RT-qPCR analyses demonstrated that skin of FT+/- neonates expressed Il33 and Osm following Alt or Alt/PNE but not PNE exposure. By contrast, expression of Areg was induced by either Alt, PNE, or Alt/PNE sensitization in FT+/- neonates. In scRNAseq analyses, Osm, Areg, and Il33 were expressed by several cell types, including a keratinocyte cluster that was expanded in the skin of Alt/PNE-exposed FT+/- pups as compared to Alt/PNE-exposed WT pups. Areg and OSM were required for oral PNE-induced anaphylaxis since anaphylaxis was inhibited by administration of neutralizing anti-Areg or anti-OSM antibodies prior to each skin sensitization with Alt/PNE. It was then determined if intradermal injection of recombinant IL33 (rIL33), rAreg, or rOSM in the skin could substitute for Alt during skin sensitization to PNE. PNE skin sensitization with intradermal rIL33 was sufficient for oral PNE-induced anaphylaxis, whereas skin sensitization with intradermal rAreg or rOSM during skin exposure to PNE was not sufficient for anaphylaxis to oral PNE challenge. Based on these studies a pathway for IL33, Areg and OSM in Alt/PNE sensitized FT+/- skin was defined for IgE induction and anaphylaxis. Alt stimulated two pathways, an IL33 pathway and a pathway involving OSM and Areg. These two pathways acted in concert with PNE to induce food allergy in pups with skin barrier mutations.
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30
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Pavel P, Leman G, Hermann M, Ploner C, Eichmann TO, Minzaghi D, Radner FP, Del Frari B, Gruber R, Dubrac S. Peroxisomal Fatty Acid Oxidation and Glycolysis Are Triggered in Mouse Models of Lesional Atopic Dermatitis. JID INNOVATIONS 2021; 1:100033. [PMID: 34909730 PMCID: PMC8659757 DOI: 10.1016/j.xjidi.2021.100033] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 04/09/2021] [Accepted: 04/09/2021] [Indexed: 12/12/2022] Open
Abstract
Alterations of the lipid profile of the stratum corneum have an important role in the pathogenesis of atopic dermatitis (AD) because they contribute to epidermal barrier impairment. However, they have not previously been envisioned as a cellular response to altered metabolic requirements in AD epidermis. In this study, we report that the lipid composition in the epidermis of flaky tail, that is, ft/ft mice mimics that of human lesional AD (ADL) epidermis, both showing a shift toward shorter lipid species. The amounts of C24 and C26 free fatty acids and C24 and C26 ceramides-oxidized exclusively in peroxisomes-were reduced in the epidermis of ft/ft mice despite increased lipid synthesis, similar to that seen in human ADL edpidermis. Increased ACOX1 protein and activity in granular keratinocytes of ft/ft epidermis, altered lipid profile in human epidermal equivalents overexpressing ACOX1, and increased ACOX1 immunostaining in skin biopsies from patients with ADL suggest that peroxisomal β-oxidation significantly contributes to lipid signature in ADL epidermis. Moreover, we show that increased anaerobic glycolysis in ft/ft mouse epidermis is essential for keratinocyte proliferation and adenosine triphosphate synthesis but does not contribute to local inflammation. Thus, this work evidenced a metabolic shift toward enhanced peroxisomal β-oxidation and anaerobic glycolysis in ADL epidermis.
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Key Words
- AD, atopic dermatitis
- ADL, lesional atopic dermatitis
- ATP, adenosine triphosphate
- Cer, ceramide
- CoA, coenzyme A
- FA, fatty acid
- FFA, free fatty acid
- HEE, human epidermal equivalent
- IMQ, imiquimod
- KC, keratinocyte
- KO, knockout
- LB, lamellar body
- PPAR, peroxisome proliferator–activated receptor
- SC, stratum corneum
- TEWL, transepidermal water loss
- ULCFA, ultra long-chain fatty acid
- VLCFA, very-long-chain fatty acid
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Affiliation(s)
- Petra Pavel
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Géraldine Leman
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Martin Hermann
- KMT Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Center for Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Christian Ploner
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Deborah Minzaghi
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Franz P.W. Radner
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Barbara Del Frari
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Robert Gruber
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
| | - Sandrine Dubrac
- Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria
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31
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Luger T, Amagai M, Dreno B, Dagnelie MA, Liao W, Kabashima K, Schikowski T, Proksch E, Elias PM, Simon M, Simpson E, Grinich E, Schmuth M. Atopic dermatitis: Role of the skin barrier, environment, microbiome, and therapeutic agents. J Dermatol Sci 2021; 102:142-157. [PMID: 34116898 DOI: 10.1016/j.jdermsci.2021.04.007] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 04/28/2021] [Accepted: 04/29/2021] [Indexed: 02/06/2023]
Abstract
Atopic dermatitis (AD) is a chronic, inflammatory skin disorder characterized by eczematous and pruritic skin lesions. In recent decades, the prevalence of AD has increased worldwide, most notably in developing countries. The enormous progress in our understanding of the complex composition and functions of the epidermal barrier allows for a deeper appreciation of the active role that the skin barrier plays in the initiation and maintenance of skin inflammation. The epidermis forms a physical, chemical, immunological, neuro-sensory, and microbial barrier between the internal and external environment. Not only lesional, but also non-lesional areas of AD skin display many morphological, biochemical and functional differences compared with healthy skin. Supporting this notion, genetic defects affecting structural proteins of the skin barrier, including filaggrin, contribute to an increased risk of AD. There is evidence to suggest that natural environmental allergens and man-made pollutants are associated with an increased likelihood of developing AD. A compromised epidermal barrier predisposes the skin to increased permeability of these compounds. Numerous topical and systemic therapies for AD are currently available or in development; while anti-inflammatory therapy is central to the treatment of AD, some existing and novel therapies also appear to exert beneficial effects on skin barrier function. Further research on the skin barrier, particularly addressing epidermal differentiation and inflammation, lipid metabolism, and the role of bacterial communities for skin barrier function, will likely expand our understanding of the complex etiology of AD and lead to identification of novel targets and the development of new therapies.
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Affiliation(s)
- Thomas Luger
- Department of Dermatology, University of Münster, Münster, Germany.
| | - Masayuki Amagai
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Brigitte Dreno
- Dermatology Department, Nantes University, CHU Nantes, CIC 1413, CRCINA, Nantes, France
| | - Marie-Ange Dagnelie
- Dermatology Department, Nantes University, CHU Nantes, CIC 1413, CRCINA, Nantes, France
| | - Wilson Liao
- Department of Dermatology, University of California, San Francisco, CA, United States
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Tamara Schikowski
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | | | - Peter M Elias
- San Francisco VA Medical Center, University of California, San Francisco, CA, United States
| | - Michel Simon
- UDEAR, Inserm, University of Toulouse, U1056, Toulouse, France
| | - Eric Simpson
- Department of Dermatology, Oregon Health & Science University, Portland, OR, United States
| | - Erin Grinich
- Department of Dermatology, Oregon Health & Science University, Portland, OR, United States
| | - Matthias Schmuth
- Department of Dermatology, Medical University Innsbruck, Innsbruck, Austria
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32
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Igawa S, Ohzono A, Pham P, Wang Z, Nakatsuji T, Dokoshi T, Di Nardo A. Sphingosine 1-Phosphate Receptor 2 Is Central to Maintaining Epidermal Barrier Homeostasis. J Invest Dermatol 2021; 141:1188-1197.e5. [PMID: 33197483 PMCID: PMC9801230 DOI: 10.1016/j.jid.2020.09.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 09/04/2020] [Accepted: 09/11/2020] [Indexed: 02/07/2023]
Abstract
The outer layer of the epidermis composes the skin barrier, a sophisticated filter constituted by layers of corneocytes in a lipid matrix. The matrix lipids, especially the ceramide-generated sphingosine 1-phosphate, are the messengers that the skin barrier uses to communicate with the basal layer of the epidermis where replicating keratinocytes are located. Sphingosine 1-phosphate is a bioactive sphingolipid mediator involved in various cellular functions through S1PR1‒5, expressed by keratinocytes. We discovered that the S1pr2 absence is linked to an impairment in the skin barrier function. Although S1pr2-/- mouse skin has no difference in its phenotype and barrier function compared with that of wild-type mouse, after tape stripping, S1pr2-/- mouse showed significantly higher transepidermal water loss and required another 24 hours to normalize their transepidermal water loss levels. Moreover, after epicutaneous Staphylococcus aureus application, impaired S1pr2-/- mouse epidermal barrier function allowed deeper bacterial penetration and denser neutrophil infiltration in the dermis. Microarray and RNA sequence of S1pr2-/- mouse epidermis linked the barrier dysfunction with a decrease in FLG2 and tight junction components. In conclusion, S1pr2-/- mice have compromised skin barrier function and increased bacteria permeability, making them a suitable model for diseases that present similar characteristics, such as atopic dermatitis.
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Affiliation(s)
- Satomi Igawa
- Department of Dermatology, School of Medicine, University of California, San Diego, La Jolla, USA,Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Ayaka Ohzono
- Department of Dermatology, School of Medicine, University of California, San Diego, La Jolla, USA
| | - Phoebe Pham
- Department of Dermatology, School of Medicine, University of California, San Diego, La Jolla, USA
| | - Zhenping Wang
- Department of Dermatology, School of Medicine, University of California, San Diego, La Jolla, USA
| | - Teruaki Nakatsuji
- Department of Dermatology, School of Medicine, University of California, San Diego, La Jolla, USA
| | - Tatsuya Dokoshi
- Department of Dermatology, School of Medicine, University of California, San Diego, La Jolla, USA
| | - Anna Di Nardo
- Department of Dermatology, School of Medicine, University of California, San Diego, La Jolla, USA,Corresponding author: Anna Di Nardo, Department of Dermatology, School of Medicine, University of California, San Diego, 9500 Gilman Drive #0869, La Jolla, CA 92093, Tel: 858-822-6712, Fax: 858-822-6985,
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33
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Muhandes L, Chapsa M, Pippel M, Behrendt R, Ge Y, Dahl A, Yi B, Dalpke A, Winkler S, Hiller M, Boutin S, Beissert S, Jessberger R, Fallon PG, Roers A. Low Threshold for Cutaneous Allergen Sensitization but No Spontaneous Dermatitis or Atopy in FLG-Deficient Mice. J Invest Dermatol 2021; 141:2611-2619.e2. [PMID: 33894197 DOI: 10.1016/j.jid.2021.02.763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/19/2021] [Accepted: 02/03/2021] [Indexed: 12/14/2022]
Abstract
Loss of FLG causes ichthyosis vulgaris. Reduced FLG expression compromises epidermal barrier function and is associated with atopic dermatitis, allergy, and asthma. The flaky tail mouse harbors two mutations that affect the skin barrier, Flgft, resulting in hypomorphic FLG expression, and Tmem79ma, inactivating TMEM79. Mice defective only for TMEM79 featured dermatitis and systemic atopy, but also Flgft/ft BALB/c congenic mice developed eczema, high IgE, and spontaneous asthma, suggesting that FLG protects from atopy. In contrast, a targeted Flg-knockout mutation backcrossed to BALB/c did not result in dermatitis or atopy. To resolve this discrepancy, we generated FLG-deficient mice on pure BALB/c background by inactivating Flg in BALB/c embryos. These mice feature an ichthyosis phenotype, barrier defect, and facilitated percutaneous sensitization. However, they do not develop dermatitis or atopy. Whole-genome sequencing of the atopic Flgft BALB/c congenics revealed that they were homozygous for the atopy-causing Tmem79matted mutation. In summary, we show that FLG deficiency does not cause atopy in mice, in line with lack of atopic disease in a fraction of patients with ichthyosis vulgaris carrying two Flg null alleles. However, the absence of FLG likely promotes and modulates dermatitis caused by other genetic barrier defects.
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Affiliation(s)
- Lina Muhandes
- Institute for Immunology, Faculty of Medicine Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Maria Chapsa
- Department of Dermatology, University Hospital Carl Gustav Carus, School of Medicine, Dresden University of Technology, Dresden, Germany
| | - Martin Pippel
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Rayk Behrendt
- Institute for Immunology, Faculty of Medicine Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Yan Ge
- Institute for Immunology, Faculty of Medicine Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Andreas Dahl
- Deep Sequencing Group, Center for Regenerative Therapies Dresden, Dresden University of Technology, Dresden, Germany
| | - Buqing Yi
- Institute of Medical Microbiology and Hygiene, Faculty of Medicine Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Alexander Dalpke
- Institute of Medical Microbiology and Hygiene, Faculty of Medicine Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Sylke Winkler
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Michael Hiller
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Sebastien Boutin
- Departmant of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital Heidelberg, Heidelberg, Germany
| | - Stefan Beissert
- Department of Dermatology, University Hospital Carl Gustav Carus, School of Medicine, Dresden University of Technology, Dresden, Germany
| | - Rolf Jessberger
- Institute of Physiological Chemistry, Faculty of Medicine Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Padraic G Fallon
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Axel Roers
- Institute for Immunology, Faculty of Medicine Carl Gustav Carus, Dresden University of Technology, Dresden, Germany.
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34
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Ito Y, Sasaki T, Li Y, Tanoue T, Sugiura Y, Skelly AN, Suda W, Kawashima Y, Okahashi N, Watanabe E, Horikawa H, Shiohama A, Kurokawa R, Kawakami E, Iseki H, Kawasaki H, Iwakura Y, Shiota A, Yu L, Hisatsune J, Koseki H, Sugai M, Arita M, Ohara O, Matsui T, Suematsu M, Hattori M, Atarashi K, Amagai M, Honda K. Staphylococcus cohnii is a potentially biotherapeutic skin commensal alleviating skin inflammation. Cell Rep 2021; 35:109052. [PMID: 33910010 DOI: 10.1016/j.celrep.2021.109052] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 03/09/2021] [Accepted: 04/07/2021] [Indexed: 12/14/2022] Open
Abstract
Host-microbe interactions orchestrate skin homeostasis, the dysregulation of which has been implicated in chronic inflammatory conditions such as atopic dermatitis and psoriasis. Here, we show that Staphylococcus cohnii is a skin commensal capable of beneficially inhibiting skin inflammation. We find that Tmem79-/- mice spontaneously develop interleukin-17 (IL-17)-producing T-cell-driven skin inflammation. Comparative skin microbiome analysis reveals that the disease activity index is negatively associated with S. cohnii. Inoculation with S. cohnii strains isolated from either mouse or human skin microbiota significantly prevents and ameliorates dermatitis in Tmem79-/- mice without affecting pathobiont burden. S. cohnii colonization is accompanied by activation of host glucocorticoid-related pathways and induction of anti-inflammatory genes in the skin and is therefore effective at suppressing inflammation in diverse pathobiont-independent dermatitis models, including chemically induced, type 17, and type 2 immune-driven models. As such, S. cohnii strains have great potential as effective live biotherapeutics for skin inflammation.
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Affiliation(s)
- Yoshihiro Ito
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, Japan; Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan; JSR-Keio University Medical and Chemical Innovation Center, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Takashi Sasaki
- Center for Supercentenarian Medical Research, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Youxian Li
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Takeshi Tanoue
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, Japan; JSR-Keio University Medical and Chemical Innovation Center, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Yuki Sugiura
- Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Ashwin N Skelly
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Wataru Suda
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan; Graduate School of Advanced Science and Engineering, Waseda University, Tokyo 169-8555, Japan
| | - Yusuke Kawashima
- Department of Applied Genomics, Kazusa DNA Research Institute, Chiba 292-0818, Japan
| | - Nobuyuki Okahashi
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Eiichiro Watanabe
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Hiroto Horikawa
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, Japan; Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Aiko Shiohama
- Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Rina Kurokawa
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan; Graduate School of Advanced Science and Engineering, Waseda University, Tokyo 169-8555, Japan
| | - Eiryo Kawakami
- Medical Sciences Innovation Hub Program (MIH), RIKEN, Kanagawa 230-0045, Japan
| | - Hachiro Iseki
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Hiroshi Kawasaki
- Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan; JSR-Keio University Medical and Chemical Innovation Center, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan; Medical Sciences Innovation Hub Program (MIH), RIKEN, Kanagawa 230-0045, Japan
| | - Yoichiro Iwakura
- Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba 278-0022, Japan
| | - Atsushi Shiota
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, Japan; JSR-Keio University Medical and Chemical Innovation Center, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Liansheng Yu
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo 189-0002, Japan
| | - Junzo Hisatsune
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo 189-0002, Japan
| | - Haruhiko Koseki
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan; Medical Sciences Innovation Hub Program (MIH), RIKEN, Kanagawa 230-0045, Japan
| | - Motoyuki Sugai
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo 189-0002, Japan
| | - Makoto Arita
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Osamu Ohara
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan; Department of Applied Genomics, Kazusa DNA Research Institute, Chiba 292-0818, Japan
| | - Takeshi Matsui
- JSR-Keio University Medical and Chemical Innovation Center, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Makoto Suematsu
- Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Masahira Hattori
- Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan; Graduate School of Advanced Science and Engineering, Waseda University, Tokyo 169-8555, Japan
| | - Koji Atarashi
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, Japan; JSR-Keio University Medical and Chemical Innovation Center, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Masayuki Amagai
- Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan; JSR-Keio University Medical and Chemical Innovation Center, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan
| | - Kenya Honda
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, Japan; JSR-Keio University Medical and Chemical Innovation Center, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Integrative Medical Science (IMS), RIKEN, Kanagawa 230-0045, Japan.
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35
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Translational Relevance of Mouse Models of Atopic Dermatitis. J Clin Med 2021; 10:jcm10040613. [PMID: 33561938 PMCID: PMC7914954 DOI: 10.3390/jcm10040613] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/31/2021] [Accepted: 02/03/2021] [Indexed: 02/06/2023] Open
Abstract
The complexity of atopic dermatitis (AD) continues to present a challenge in the appropriate selection of a mouse model because no single murine model completely recapitulates all aspects of human AD. This has been further complicated by recent evidence of the distinct AD endotypes that are dictated by unique patterns of inflammation involving Th1, Th2, Th17, and Th22 axes. A review of currently used mouse models demonstrates that while all AD mouse models consistently exhibit Th2 inflammation, only some demonstrate concomitant Th17 and/or Th22 induction. As the current understanding of the pathogenic contributions of these unique endotypes and their potential therapeutic roles expands, ongoing efforts to maximize a given mouse model’s homology with human AD necessitates a close evaluation of its distinct immunological signature.
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36
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Gilhar A, Reich K, Keren A, Kabashima K, Steinhoff M, Paus R. Mouse models of atopic dermatitis: a critical reappraisal. Exp Dermatol 2021; 30:319-336. [PMID: 33368555 DOI: 10.1111/exd.14270] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 12/17/2020] [Accepted: 12/17/2020] [Indexed: 12/13/2022]
Abstract
Mouse models for atopic dermatitis (AD) are an indispensable preclinical research tool for testing new candidate AD therapeutics and for interrogating AD pathobiology in vivo. In this Viewpoint, we delineate why, unfortunately, none of the currently available so-called "AD" mouse models satisfactorily reflect the clinical complexity of human AD, but imitate more "allergic" or "irriant" contact dermatitis conditions. This limits the predictive value of AD models for clinical outcomes of new tested candidate AD therapeutics and the instructiveness of mouse models for human AD pathophysiology research. Here, we propose to initiate a rational debate on the minimal criteria that a mouse model should meet in order to be considered relevant for human AD. We suggest that valid AD models should at least meet the following criteria: (a) an AD-like epidermal barrier defect with reduced filaggrin expression along with hyperproliferation, hyperplasia; (b) increased epidermal expression of thymic stromal lymphopoietin (TSLP), periostin and/or chemokines such as TARC (CCL17); (c) a characteristic dermal immune cell infiltrate with overexpression of some key cytokines such as IL-4, IL-13, IL-31 and IL-33; (d) distinctive "neurodermatitis" features (sensory skin hyperinnervation, defective beta-adrenergic signalling, neurogenic skin inflammation and triggering or aggravation of AD-like skin lesions by perceived stress); and (e) response of experimentally induced skin lesions to standard AD therapy. Finally, we delineate why humanized AD mouse models (human skin xenotransplants on SCID mice) offer a particularly promising preclinical research alternative to the currently available "AD" mouse models.
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Affiliation(s)
- Amos Gilhar
- Skin Research Laboratory, Rappaport Faculty of Medicine, Technion -Israel Institute of Technology, Haifa, Israel.,Rambam Health Care Campus, Haifa, Israel
| | - Kristian Reich
- Centre for Translational Research in Inflammatory Skin Diseases, Institute for Health Services Research in Dermatology and Nursing, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Skinflammation Center, Hamburg, Germany
| | - Aviad Keren
- Skin Research Laboratory, Rappaport Faculty of Medicine, Technion -Israel Institute of Technology, Haifa, Israel
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Singapore Immunology Network (SIgN) and Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore, Singapore
| | - Martin Steinhoff
- Department of Dermatology and Venereology, Hamad Medical Corporation, Qatar University, Doha, Qatar.,School of Medicine, Weill Cornell University-Qatar and Qatar University, Doha, Qatar
| | - Ralf Paus
- Dr. Phillip Frost, Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.,Dermatology Research Centre, University of Manchester and NIHR Manchester Biomedical Research Centre, Manchester, UK.,Monasterium Laboratory, Münster, Germany
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37
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Ishitsuka Y, Roop DR, Ogawa T. "Structural imprinting" of the cutaneous immune effector function. Tissue Barriers 2021; 9:1851561. [PMID: 33270506 PMCID: PMC7849724 DOI: 10.1080/21688370.2020.1851561] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/07/2020] [Accepted: 11/10/2020] [Indexed: 01/30/2023] Open
Abstract
Keratinization provides tolerance to desiccation and mechanical durability. Loricrin, which is an epidermal thiol-rich protein, efficiently stabilizes terminally differentiated keratinocytes and maintains redox homeostasis. The discovery of the largely asymptomatic loricrin knockout (LKO) phenotype decades ago was rather unpredicted. Nevertheless, when including redox-driven, NF-E2-related factor 2-mediated backup responses, LKO mice provide opportunities for the observation of altered or "quasi-normal" homeostasis. Specifically, given that the tissue structure, as well as the local metabolism, transmits immunological signals, we sought to dissect the consequence of truncated epidermal differentiation program from immunological perspectives. Through a review of the aggregated evidence, we have attempted to generate an integrated view of the regulation of the peripheral immune system, which possibly occurs within the squamous epithelial tissue with truncated differentiation. This synthesis might not only provide insights into keratinization but also lead to the identification of factors intrinsic to the epidermis that imprint the immune effector function.
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Affiliation(s)
- Yosuke Ishitsuka
- Department of Dermatology, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Dennis R. Roop
- Department of Dermatology and Charles C. Gates Center for Regenerative Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Tatsuya Ogawa
- Department of Dermatology, Osaka University Graduate School of Medicine, Osaka, Japan
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38
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Epidermal Acyl-CoA-binding protein is indispensable for systemic energy homeostasis. Mol Metab 2020; 44:101144. [PMID: 33346070 PMCID: PMC7797911 DOI: 10.1016/j.molmet.2020.101144] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 12/03/2020] [Accepted: 12/10/2020] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVES The skin is the largest sensory organ of the human body and plays a fundamental role in regulating body temperature. However, adaptive alterations in skin functions and morphology have only vaguely been associated with physiological responses to cold stress or sensation of ambient temperatures. We previously found that loss of acyl-CoA-binding protein (ACBP) in keratinocytes upregulates lipolysis in white adipose tissue and alters hepatic lipid metabolism, suggesting a link between epidermal barrier functions and systemic energy metabolism. METHODS To assess the physiological responses to loss of ACBP in keratinocytes in detail, we used full-body ACBP-/- and skin-specific ACBP-/- knockout mice to clarify how loss of ACBP affects 1) energy expenditure by indirect calorimetry, 2) response to high-fat feeding and a high oral glucose load, and 3) expression of brown-selective gene programs by quantitative PCR in inguinal WAT (iWAT). To further elucidate the role of the epidermal barrier in systemic energy metabolism, we included mice with defects in skin structural proteins (ma/ma Flgft/ft) in these studies. RESULTS We show that the ACBP-/- mice and skin-specific ACBP-/- knockout mice exhibited increased energy expenditure, increased food intake, browning of the iWAT, and resistance to diet-induced obesity. The metabolic phenotype, including browning of the iWAT, was reversed by housing the mice at thermoneutrality (30 °C) or pharmacological β-adrenergic blocking. Interestingly, these findings were phenocopied in flaky tail mice (ma/ma Flgft/ft). Taken together, we demonstrate that a compromised epidermal barrier induces a β-adrenergic response that increases energy expenditure and browning of the white adipose tissue to maintain a normal body temperature. CONCLUSIONS Our findings show that the epidermal barrier plays a key role in maintaining systemic metabolic homeostasis. Thus, regulation of epidermal barrier functions warrants further attention to understand the regulation of systemic metabolism in further detail.
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39
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Saunders SP, Floudas A, Moran T, Byrne CM, Rooney MD, Fahy CMR, Geoghegan JA, Iwakura Y, Fallon PG, Schwartz C. Dysregulated skin barrier function in Tmem79 mutant mice promotes IL-17A-dependent spontaneous skin and lung inflammation. Allergy 2020; 75:3216-3227. [PMID: 32644214 DOI: 10.1111/all.14488] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/30/2020] [Accepted: 05/18/2020] [Indexed: 12/28/2022]
Abstract
BACKGROUND Atopic dermatitis (AD) is associated with a dysregulation of the skin barrier and may predispose to the development of secondary allergic conditions, such as asthma. Tmem79ma/ma mice harbor a mutation in the gene encoding Transmembrane Protein 79 (or Mattrin), which has previously been associated with AD. As a result of the Tmem79 gene mutation, these mice have a defective skin barrier and develop spontaneous skin inflammation. In this study, Tmem79ma/ma mice were assessed for the underlying immunological response in the development of spontaneous skin and lung inflammation. METHODS Development of spontaneous skin and lung inflammation in Tmem79ma/ma mice was analyzed. We further investigated susceptibility to cutaneous Staphylococcus aureus infection. Tmem79ma/ma were crossed to IL-17A-deficient mice to address the contribution of IL-17A to spontaneous skin and lung disease. RESULTS Tmem79ma/ma mice developed IL-17A-dependent spontaneous AD-like inflammation and were refractory to S aureus infection. Mutant mice progressed to airway inflammation subsequent to the occurrence of dermatitis. The progression from skin to lung disease is dependent on adaptive immunity and is facilitated by cutaneous expansion of Th17 and TCRγδ T cells. CONCLUSION Mice lacking Tmem79/Mattrin expression have a defective skin barrier. In adulthood, these mice develop dermatitis with secondary progression to lung inflammation. The development of skin and lung inflammation is IL-17A-dependent and mediated by TCRγδ T cells.
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Affiliation(s)
- Sean P. Saunders
- Trinity Biomedical Sciences Institute School of Medicine Trinity College Dublin Dublin Ireland
| | - Achilleas Floudas
- Trinity Biomedical Sciences Institute School of Medicine Trinity College Dublin Dublin Ireland
| | - Tara Moran
- Trinity Biomedical Sciences Institute School of Medicine Trinity College Dublin Dublin Ireland
- National Children's Research Centre Our Lady's Children's Hospital Crumlin, Dublin Ireland
| | - Ciara M. Byrne
- Trinity Biomedical Sciences Institute School of Medicine Trinity College Dublin Dublin Ireland
| | - Michael D. Rooney
- Trinity Biomedical Sciences Institute School of Medicine Trinity College Dublin Dublin Ireland
| | - Caoimhe M. R. Fahy
- Trinity Biomedical Sciences Institute School of Medicine Trinity College Dublin Dublin Ireland
- Dermatology Our Lady's Children's Hospital Crumlin Dublin Ireland
| | - Joan A. Geoghegan
- Department of Microbiology Moyne Institute of Preventive Medicine School of Genetics and Microbiology Trinity College Dublin Dublin Ireland
| | - Yoichiro Iwakura
- Research Institute for Biomedical Sciences Tokyo University of Science Yamazaki Japan
| | - Padraic G. Fallon
- Trinity Biomedical Sciences Institute School of Medicine Trinity College Dublin Dublin Ireland
- National Children's Research Centre Our Lady's Children's Hospital Crumlin, Dublin Ireland
| | - Christian Schwartz
- Trinity Biomedical Sciences Institute School of Medicine Trinity College Dublin Dublin Ireland
- Mikrobiologisches Institut ‐ Klinische Mikrobiologie, Immunologie und Hygiene Universitätsklinikum Erlangen and Friedrich‐Alexander Universität (FAU) Erlangen‐Nürnberg Erlangen Germany
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40
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Elias PM, Wakefield JS. Provozieren konvergierende zelluläre und Signalübertragungs‐Störungen die atopische Dermatitis? J Dtsch Dermatol Ges 2020; 18:1215-1224. [DOI: 10.1111/ddg.14232_g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 05/18/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Peter M. Elias
- Dermatology Service Veterans Affairs Medical Center and Department of Dermatology University of California San Francisco CA USA
| | - Joan S. Wakefield
- Dermatology Service Veterans Affairs Medical Center and Department of Dermatology University of California San Francisco CA USA
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41
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Elias PM, Wakefield JS. Could cellular and signaling abnormalities converge to provoke atopic dermatitis? J Dtsch Dermatol Ges 2020; 18:1215-1223. [PMID: 33048449 PMCID: PMC11249044 DOI: 10.1111/ddg.14232] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 05/18/2020] [Indexed: 11/28/2022]
Abstract
Diverse inherited and acquired abnormalities in epidermal structural and enzymatic proteins compromise permeability, barrier function and antimicrobial defense in atopic dermatitis (AD). Though several mutations in filaggrin (FLG) predominate, alterations in other S-100, cornified envelope precursor proteins (hornerin [HRNR], filaggrin 2 [FLG2], SPRR3, mattrin) which regulate lamellar body formation; SPINK5, which encodes the serine protease inhibitor, LEKTI1, and a fatty acid transporter, FATP4, are all separately associated with an AD phenotype. Exogenous and endogenous stressors, such as prolonged psychological stress, a low environmental humidity, or exposure to basic soaps and surfactants can further compromise barrier function and are often required to trigger disease. In the immunologists' view, the barrier abnormality is relevant only because it allows antigen and pathogen access, while stimulating Th2 cytokine production. These proteins in turn downregulate lipid synthetic enzyme and antimicrobial peptide levels, as well as multiple epidermal structural proteins, including filaggrin. Each inherited and acquired abnormality can independently compromise lamellar body secretion production, resulting in defective lamellar membrane organization and antimicrobial defense. Furthermore, elevated pH of the SC is critical for AD pathogenesis, compromising post-secretory lipid processing, while also enhancing inflammation. There are various therapeutic options that interdict different stages in this pathogenic paradigm.
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Affiliation(s)
- Peter M Elias
- Dermatology Service, Veterans Affairs Medical Center, and Department of Dermatology, University of California, San Francisco, CA, USA
| | - Joan S Wakefield
- Dermatology Service, Veterans Affairs Medical Center, and Department of Dermatology, University of California, San Francisco, CA, USA
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42
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Chen M, Amado N, Tan J, Reis A, Ge M, Abreu JG, He X. TMEM79/MATTRIN defines a pathway for Frizzled regulation and is required for Xenopus embryogenesis. eLife 2020; 9:e56793. [PMID: 32924931 PMCID: PMC7521923 DOI: 10.7554/elife.56793] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 09/11/2020] [Indexed: 12/28/2022] Open
Abstract
Wnt signaling through the Frizzled (FZD) family of serpentine receptors is essential for embryogenesis and homeostasis, and stringent control of the FZD protein level is critical for stem cell regulation. Through CRISPR/Cas9 genome-wide screening in human cells, we identified TMEM79/MATTRIN, an orphan multi-span transmembrane protein, as a specific inhibitor of Wnt/FZD signaling. TMEM79 interacts with FZD during biogenesis and promotes FZD degradation independent of ZNRF3/RNF43 ubiquitin ligases (R-spondin receptors). TMEM79 interacts with ubiquitin-specific protease 8 (USP8), whose activating mutations underlie human tumorigenesis. TMEM79 specifically inhibits USP8 deubiquitination of FZD, thereby governing USP8 substrate specificity and promoting FZD degradation. Tmem79 and Usp8 genes have a pre-bilaterian origin, and Tmem79 inhibition of Usp8 and Wnt signaling is required for anterior neural development and gastrulation in Xenopus embryos. TMEM79 is a predisposition gene for Atopic dermatitis, suggesting deregulation of Wnt/FZD signaling a possible cause for this most common yet enigmatic inflammatory skin disease.
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Affiliation(s)
- Maorong Chen
- F. M. Kirby Neurobiology Center, Boston Children’s Hospital, Department of Neurology, Harvard Medical SchoolBostonUnited States
| | - Nathalia Amado
- F. M. Kirby Neurobiology Center, Boston Children’s Hospital, Department of Neurology, Harvard Medical SchoolBostonUnited States
| | - Jieqiong Tan
- F. M. Kirby Neurobiology Center, Boston Children’s Hospital, Department of Neurology, Harvard Medical SchoolBostonUnited States
| | - Alice Reis
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroRio de JaneiroBrazil
| | - Mengxu Ge
- F. M. Kirby Neurobiology Center, Boston Children’s Hospital, Department of Neurology, Harvard Medical SchoolBostonUnited States
| | - Jose Garcia Abreu
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroRio de JaneiroBrazil
| | - Xi He
- F. M. Kirby Neurobiology Center, Boston Children’s Hospital, Department of Neurology, Harvard Medical SchoolBostonUnited States
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43
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Suprabasin-null mice retain skin barrier function and show high contact hypersensitivity to nickel upon oral nickel loading. Sci Rep 2020; 10:14559. [PMID: 32884021 PMCID: PMC7471289 DOI: 10.1038/s41598-020-71536-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 08/06/2020] [Indexed: 12/22/2022] Open
Abstract
Suprabasin (SBSN) is expressed not only in epidermis but also in epithelial cells of the upper digestive tract where metals such as nickel are absorbed. We have recently shown that SBSN level is decreased in the stratum corneum and serum of atopic dermatitis (AD) patients, especially in intrinsic AD, which is characterized by metal allergy. By using SBSN-null (Sbsn–/–) mice, this study was conducted to investigate the outcome of SBSN deficiency in relation to AD. Sbsn–/– mice exhibited skin barrier dysfunction on embryonic day 16.5, but after birth, their barrier function was not perturbed despite the presence of ultrastructural changes in stratum corneum and keratohyalin granules. Sbsn–/– mice showed a comparable ovalbumin-specific skin immune response to wild type (WT) mice and rather lower contact hypersensitivity (CHS) responses to haptens than did WT mice. The blood nickel level after oral feeding of nickel was significantly higher in Sbsn–/– mice than in WT mice, and CHS to nickel was elevated in Sbsn–/– mice under nickel-loading condition. Our study suggests that the completely SBSN deficient mice retain normal barrier function, but harbor abnormal upper digestive tract epithelium that promotes nickel absorption and high CHS to nickel, sharing the features of intrinsic AD.
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44
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Jee MH, Mraz V, Geisler C, Bonefeld CM. γδ T cells and inflammatory skin diseases. Immunol Rev 2020; 298:61-73. [DOI: 10.1111/imr.12913] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/07/2020] [Accepted: 07/15/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Mia Hamilton Jee
- The LEO Foundation Skin Immunology Research Center Department of Immunology and Microbiology Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
| | - Veronika Mraz
- The LEO Foundation Skin Immunology Research Center Department of Immunology and Microbiology Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
| | - Carsten Geisler
- The LEO Foundation Skin Immunology Research Center Department of Immunology and Microbiology Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
| | - Charlotte Menné Bonefeld
- The LEO Foundation Skin Immunology Research Center Department of Immunology and Microbiology Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
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45
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Buhl T, Ikoma A, Kempkes C, Cevikbas F, Sulk M, Buddenkotte J, Akiyama T, Crumrine D, Camerer E, Carstens E, Schön MP, Elias P, Coughlin SR, Steinhoff M. Protease-Activated Receptor-2 Regulates Neuro-Epidermal Communication in Atopic Dermatitis. Front Immunol 2020; 11:1740. [PMID: 32903402 PMCID: PMC7435019 DOI: 10.3389/fimmu.2020.01740] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 06/29/2020] [Indexed: 01/01/2023] Open
Abstract
Background: Activation of protease-activated receptor-2 (PAR2) has been implicated in inflammation, pruritus, and skin barrier regulation, all characteristics of atopic dermatitis (AD), as well as Netherton syndrome which has similar characteristics. However, understanding the precise role of PAR2 on neuro-immune communication in AD has been hampered by the lack of appropriate animal models. Methods: We used a recently established mouse model with epidermal overexpression of PAR2 (PAR2OE) and littermate WT mice to study the impact of increased PAR2 expression in epidermal cells on spontaneous and house dust mite (HDM)-induced skin inflammation, itch, and barrier dysfunction in AD, in vivo and ex vivo. Results: PAR2OE newborns displayed no overt abnormalities, but spontaneously developed dry skin, severe pruritus, and eczema. Dermatological, neurophysiological, and immunological analyses revealed the hallmarks of AD-like skin disease. Skin barrier defects were observed before onset of skin lesions. Application of HDM onto PAR2OE mice triggered pruritus and the skin phenotype. PAR2OE mice displayed an increased density of nerve fibers, increased nerve growth factor and endothelin-1 expression levels, alloknesis, enhanced scratching (hyperknesis), and responses of dorsal root ganglion cells to non-histaminergic pruritogens. Conclusion: PAR2 in keratinocytes, activated by exogenous and endogenous proteases, is sufficient to drive barrier dysfunction, inflammation, and pruritus and sensitize skin to the effects of HDM in a mouse model that mimics human AD. PAR2 signaling in keratinocytes appears to be sufficient to drive several levels of neuro-epidermal communication, another feature of human AD.
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Affiliation(s)
- Timo Buhl
- Department of Dermatology and Surgery, University of California, San Francisco, San Francisco, CA, United States.,Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - Akihiko Ikoma
- Department of Dermatology and Surgery, University of California, San Francisco, San Francisco, CA, United States.,Department of Dermatology and UCD Charles Institute for Translational Dermatology, University College Dublin, Dublin, Ireland
| | - Cordula Kempkes
- Department of Dermatology and Surgery, University of California, San Francisco, San Francisco, CA, United States
| | - Ferda Cevikbas
- Department of Dermatology and Surgery, University of California, San Francisco, San Francisco, CA, United States
| | - Mathias Sulk
- Department of Dermatology and Surgery, University of California, San Francisco, San Francisco, CA, United States.,Department of Dermatology, University Hospital Münster, Münster, Germany
| | - Joerg Buddenkotte
- Department of Dermatology and Venerology, Hamad Medical Corporation, Doha, Qatar.,Translational Research Institute, Academic Health System, Hamad Medical Corporation, Doha, Qatar
| | - Tasuku Akiyama
- Department of Dermatology, Anatomy and Cell Biology, Temple Itch Center, Temple University, Philadelphia, PA, United States.,Department of Neurobiology, Physiology and Behavior, University of California, Davis, Davis, CA, United States
| | - Debbie Crumrine
- Department of Dermatology and Surgery, University of California, San Francisco, San Francisco, CA, United States
| | - Eric Camerer
- INSERM U970, Paris Cardiovascular Research Centre, Paris, France
| | - Earl Carstens
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, Davis, CA, United States
| | - Michael P Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - Peter Elias
- Department of Dermatology and Surgery, University of California, San Francisco, San Francisco, CA, United States
| | - Shaun R Coughlin
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, United States
| | - Martin Steinhoff
- Department of Dermatology and Surgery, University of California, San Francisco, San Francisco, CA, United States.,Department of Dermatology and UCD Charles Institute for Translational Dermatology, University College Dublin, Dublin, Ireland.,Department of Dermatology and Venerology, Hamad Medical Corporation, Doha, Qatar.,Translational Research Institute, Academic Health System, Hamad Medical Corporation, Doha, Qatar.,Department of Dermatology, Medical School, University of Qatar, Doha, Qatar.,School of Medicine, Weill Cornell Medicine-Qatar, Doha, Qatar.,Department of Dermatology, Weill Cornell Medicine, New York, NY, United States
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46
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Guerrero-Aspizua S, Carretero M, Conti CJ, Del Río M. The importance of immunity in the development of reliable animal models for psoriasis and atopic dermatitis. Immunol Cell Biol 2020; 98:626-638. [PMID: 32479655 DOI: 10.1111/imcb.12365] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 05/27/2020] [Accepted: 05/27/2020] [Indexed: 01/17/2023]
Abstract
Psoriasis (PS) and atopic dermatitis (AD) are common inflammatory skin diseases characterized by an imbalance in specific T-cell subsets, resulting in a specific cytokine profile in patients. Obtaining models closely resembling both pathologies along with a relevant clinical impact is crucial for the development of new therapies because of the high prevalence of these diseases. Single-gene mouse models developed until now do not fully reflect the complexity of these disorders, in part not only because of inherent differences between mice and humans but also because of the multifactorial nature of these pathologies. The skin-humanized mouse model developed by our group, based on a tissue engineering approach, has been used to test therapeutic strategies, although this methodology is still technically challenging and not widely available. The skin-humanized mouse models for PS and AD reproduce human skin phenotypes, providing valuable tools for drug development and testing in the preclinical setting. The tissue engineering approach allows the development of personalized medicine, covering the broad genotypic spectrum of these pathologies. This review highlights the main differences between available murine models focusing on the tissue-specific immunity of PS and AD. We discuss their contribution to unravel the complex pathophysiology of these diseases and to translate this knowledge into more accurate therapies.
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Affiliation(s)
- Sara Guerrero-Aspizua
- Department of Bioengineering, Universidad Carlos III de Madrid, Leganés, 28911, Spain.,Hospital Fundación Jiménez Díaz e Instituto de Investigación FJD, Madrid, 28040, Spain.,Epithelial Biomedicine Division, CIEMAT, Madrid, 28040, Spain.,Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, U714, Spain
| | - Marta Carretero
- Hospital Fundación Jiménez Díaz e Instituto de Investigación FJD, Madrid, 28040, Spain.,Epithelial Biomedicine Division, CIEMAT, Madrid, 28040, Spain.,Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, U714, Spain
| | - Claudio J Conti
- Department of Bioengineering, Universidad Carlos III de Madrid, Leganés, 28911, Spain.,Hospital Fundación Jiménez Díaz e Instituto de Investigación FJD, Madrid, 28040, Spain
| | - Marcela Del Río
- Department of Bioengineering, Universidad Carlos III de Madrid, Leganés, 28911, Spain.,Hospital Fundación Jiménez Díaz e Instituto de Investigación FJD, Madrid, 28040, Spain.,Epithelial Biomedicine Division, CIEMAT, Madrid, 28040, Spain.,Centre for Biomedical Network Research on Rare Diseases (CIBERER), Madrid, U714, Spain
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47
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Thyssen JP, Jakasa I, Riethmüller C, Schön MP, Braun A, Haftek M, Fallon PG, Wróblewski J, Jakubowski H, Eckhart L, Declercq W, Koppes S, Engebretsen KA, Bonefeld C, Irvine AD, Keita-Alassane S, Simon M, Kawasaki H, Kubo A, Amagai M, Matsui T, Kezic S. Filaggrin Expression and Processing Deficiencies Impair Corneocyte Surface Texture and Stiffness in Mice. J Invest Dermatol 2020; 140:615-623.e5. [DOI: 10.1016/j.jid.2019.07.716] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 06/20/2019] [Accepted: 07/08/2019] [Indexed: 12/22/2022]
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48
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Spidale NA, Malhotra N, Frascoli M, Sylvia K, Miu B, Freeman C, Stadinski BD, Huseby E, Kang J. Neonatal-derived IL-17 producing dermal γδ T cells are required to prevent spontaneous atopic dermatitis. eLife 2020; 9:e51188. [PMID: 32065580 PMCID: PMC7025821 DOI: 10.7554/elife.51188] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 02/11/2020] [Indexed: 01/01/2023] Open
Abstract
Atopic Dermatitis (AD) is a T cell-mediated chronic skin disease and is associated with altered skin barrier integrity. Infants with mutations in genes involved in tissue barrier fitness are predisposed towards inflammatory diseases, but most do not develop or sustain the diseases, suggesting that there exist regulatory immune mechanisms to prevent aberrant inflammation. The absence of one single murine dermal cell type, the innate neonatal-derived IL-17 producing γδ T (Tγδ17) cells, from birth resulted in spontaneous, highly penetrant AD with many of the major hallmarks of human AD. In Tγδ17 cell-deficient mice, basal keratinocyte transcriptome was altered months in advance of AD induction. Tγδ17 cells respond to skin commensal bacteria and the fulminant disease in their absence was driven by skin commensal bacteria dysbiosis. AD in this model was characterized by highly expanded dermal αβ T clonotypes that produce the type three cytokines, IL-17 and IL-22. These results demonstrate that neonatal Tγδ17 cells are innate skin regulatory T cells that are critical for skin homeostasis, and that IL-17 has dual homeostatic and inflammatory function in the skin.
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MESH Headings
- Animals
- Animals, Newborn
- Autoantigens/genetics
- Cell Differentiation
- Dermatitis, Atopic/genetics
- Dermatitis, Atopic/immunology
- Dermatitis, Atopic/prevention & control
- Disease Models, Animal
- Gene Expression
- Interleukin-17/biosynthesis
- Interleukins/biosynthesis
- Keratinocytes/cytology
- Keratinocytes/metabolism
- Lymphocyte Activation
- Mice
- Mice, Knockout
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Skin/metabolism
- Skin/microbiology
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Interleukin-22
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Affiliation(s)
- Nicholas A Spidale
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Nidhi Malhotra
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Michela Frascoli
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Katelyn Sylvia
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Bing Miu
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Coral Freeman
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Brian D Stadinski
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Eric Huseby
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Joonsoo Kang
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
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49
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Beichman AC, Koepfli KP, Li G, Murphy W, Dobrynin P, Kliver S, Tinker MT, Murray MJ, Johnson J, Lindblad-Toh K, Karlsson EK, Lohmueller KE, Wayne RK. Aquatic Adaptation and Depleted Diversity: A Deep Dive into the Genomes of the Sea Otter and Giant Otter. Mol Biol Evol 2019; 36:2631-2655. [PMID: 31212313 PMCID: PMC7967881 DOI: 10.1093/molbev/msz101] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Despite its recent invasion into the marine realm, the sea otter (Enhydra lutris) has evolved a suite of adaptations for life in cold coastal waters, including limb modifications and dense insulating fur. This uniquely dense coat led to the near-extinction of sea otters during the 18th-20th century fur trade and an extreme population bottleneck. We used the de novo genome of the southern sea otter (E. l. nereis) to reconstruct its evolutionary history, identify genes influencing aquatic adaptation, and detect signals of population bottlenecks. We compared the genome of the southern sea otter with the tropical freshwater-living giant otter (Pteronura brasiliensis) to assess common and divergent genomic trends between otter species, and with the closely related northern sea otter (E. l. kenyoni) to uncover population-level trends. We found signals of positive selection in genes related to aquatic adaptations, particularly limb development and polygenic selection on genes related to hair follicle development. We found extensive pseudogenization of olfactory receptor genes in both the sea otter and giant otter lineages, consistent with patterns of sensory gene loss in other aquatic mammals. At the population level, the southern sea otter and the northern sea otter showed extremely low genomic diversity, signals of recent inbreeding, and demographic histories marked by population declines. These declines may predate the fur trade and appear to have resulted in an increase in putatively deleterious variants that could impact the future recovery of the sea otter.
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Affiliation(s)
- Annabel C Beichman
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA
| | - Klaus-Peter Koepfli
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Washington, DC
- Institute of Molecular and Cellular Biology, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Gang Li
- College of Life Science, Shaanxi Normal University, Xi’an, Shaanxi, China
| | - William Murphy
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX
| | - Pasha Dobrynin
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Washington, DC
- Institute of Molecular and Cellular Biology, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Sergei Kliver
- Institute of Molecular and Cellular Biology, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Martin T Tinker
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA
| | | | - Jeremy Johnson
- Vertebrate Genome Biology, Broad Institute of MIT and Harvard, Cambridge, MA
| | - Kerstin Lindblad-Toh
- Vertebrate Genome Biology, Broad Institute of MIT and Harvard, Cambridge, MA
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Elinor K Karlsson
- Vertebrate Genome Biology, Broad Institute of MIT and Harvard, Cambridge, MA
- Bioinformatics and Integrative Biology, University of Massachusetts Medical School, Worcester, MA
| | - Kirk E Lohmueller
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA
- Interdepartmental Program in Bioinformatics, University of California, Los Angeles, CA
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, CA
| | - Robert K Wayne
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA
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50
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Nakajima S, Nomura T, Common J, Kabashima K. Insights into atopic dermatitis gained from genetically defined mouse models. J Allergy Clin Immunol 2019; 143:13-25. [PMID: 30612664 DOI: 10.1016/j.jaci.2018.11.014] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/14/2018] [Accepted: 11/16/2018] [Indexed: 01/01/2023]
Abstract
Atopic dermatitis (AD) is characterized by severe pruritus and recurrent eczema with a chronic disease course. Impaired skin barrier function, hyperactivated TH2 cell-type inflammation, and pruritus-induced scratching contribute to the disease pathogenesis of AD. Skin microbial alterations complicate the pathogenesis of AD further. Mouse models are a powerful tool to analyze such intricate pathophysiology of AD, with a caution that anatomy and immunology of the skin differ between human subjects and mice. Here we review recent understanding of AD etiology obtained using mouse models, which address the epidermal barrier, skin microbiome, TH2 immune response, and pruritus.
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Affiliation(s)
- Saeko Nakajima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takashi Nomura
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - John Common
- Skin Research Institute of Singapore (SRIS), Singapore.
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan; Skin Research Institute of Singapore (SRIS), Singapore; Singapore Immunology Network, A*STAR, Singapore.
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