1
|
Szymczak K, Szewczyk G, Rychłowski M, Sarna T, Zhang L, Grinholc M, Nakonieczna J. Photoactivated Gallium Porphyrin Reduces Staphylococcus aureus Colonization on the Skin and Suppresses Its Ability to Produce Enterotoxin C and TSST-1. Mol Pharm 2023; 20:5108-5124. [PMID: 37653709 PMCID: PMC10553792 DOI: 10.1021/acs.molpharmaceut.3c00399] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 09/02/2023]
Abstract
Staphylococcus aureus is a key pathogen in atopic dermatitis (AD) pathogenicity. Over half of AD patients are carriers of S. aureus. Clinical isolates derived from AD patients produce various staphylococcal enterotoxins, such as staphylococcal enterotoxin C or toxic shock syndrome toxin. The production of these virulence factors is correlated with more severe AD. In this study, we propose cationic heme-mimetic gallium porphyrin (Ga3+CHP), a novel gallium metalloporphyrin, as an anti-staphylococcal agent that functions through dual mechanisms: a light-dependent mechanism (antimicrobial photodynamic inactivation, aPDI) and a light-independent mechanism (suppressing iron metabolism). Ga3+CHP has two additive quaternary ammonium groups that increase its water solubility. Furthermore, Ga3+CHP is an efficient generator of singlet oxygen and can be recognized by heme-target systems such as Isd, which improves the intracellular accumulation of this compound. Ga3+CHP activated with green light effectively reduced the survival of clinical S. aureus isolates derived from AD patients (>5 log10 CFU/mL) and affected their enterotoxin gene expression. Additionally, there was a decrease in the biological functionality of studied toxins regarding their superantigenicity. In aPDI conditions, there was no pronounced toxicity in HaCaT keratinocytes with both normal and suppressed filaggrin gene expression, which occurs in ∼50% of AD patients. Additionally, no mutagenic activity was observed. Green light-activated gallium metalloporphyrins may be a promising chemotherapeutic to reduce S. aureus colonization on the skin of AD patients.
Collapse
Affiliation(s)
- Klaudia Szymczak
- Laboratory
of Photobiology and Molecular Diagnostics, Intercollegiate Faculty
of Biotechnology, University of Gdansk and
Medical University of Gdansk, Gdansk 80-307, Poland
| | - Grzegorz Szewczyk
- Department
of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Michał Rychłowski
- Laboratory
of Virus Molecular Biology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Gdansk 80-307, Poland
| | - Tadeusz Sarna
- Department
of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Lei Zhang
- Department
of Biochemical Engineering, School of Chemical Engineering and Technology,
Frontier Science Center for Synthetic Biology and Key Laboratory of
Systems Bioengineering (MOE), Tianjin University, Tianjin 300350, China
| | - Mariusz Grinholc
- Laboratory
of Photobiology and Molecular Diagnostics, Intercollegiate Faculty
of Biotechnology, University of Gdansk and
Medical University of Gdansk, Gdansk 80-307, Poland
| | - Joanna Nakonieczna
- Laboratory
of Photobiology and Molecular Diagnostics, Intercollegiate Faculty
of Biotechnology, University of Gdansk and
Medical University of Gdansk, Gdansk 80-307, Poland
| |
Collapse
|
2
|
Bhat P, Garibyan L. The Potential of CRISPR-Guided Therapies in the Dermatology Clinic. JID INNOVATIONS 2022; 2:100103. [PMID: 35265937 PMCID: PMC8899042 DOI: 10.1016/j.xjidi.2022.100103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/03/2022] [Accepted: 01/10/2022] [Indexed: 11/17/2022] Open
Abstract
Over the past decade, CRISPR has rapidly made its way from the bench to the bedside, providing a newfound therapeutic avenue to not only treat genetic diseases but also permanently cure them. Although there are several clinical trials in early stages, there are so far no CRISPR-based clinical trials for cutaneous disease. In this review, we describe multiple cutaneous diseases that represent ideal targets for CRISPR-based therapeutics owing to known single gene‒causing mutations. We also explore the potential of CRISPR nucleases to treat inflammatory disorders such as eczema and psoriasis, which are not classically categorized as genodermatoses. We describe the therapeutic solutions for these diseases that are guided by various CRISPR-associated (Cas) effector proteins, for example, using Cas9 to permanently edit the DNA of somatic cells, Cas3 to target foreign DNA to combat viral/bacterial skin infections, and Cas13 to edit mutated RNA transcripts in diseases where permanent DNA editing is untenable. Furthermore, we discuss various drug delivery modalities for CRISPR therapeutics, including transdermal patches and microneedles, which are uniquely suited for dermatological diseases. In summary, we highlight the potential of CRISPR-based therapeutics to revolutionize the treatment of cutaneous disease with a goal of being accessible to the practicing dermatologist.
Collapse
Affiliation(s)
- Prashant Bhat
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, USA
| | - Lilit Garibyan
- Wellman Center for Photomedicine, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
3
|
Mitchell KN, Tay YK, Heath CR, Silverberg NB. Review article: Emerging issues in pediatric skin of color, Part 2. Pediatr Dermatol 2021; 38 Suppl 2:30-36. [PMID: 34708446 DOI: 10.1111/pde.14774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dermatology for pediatric skin of color is the application of dermatology to the genetically diverse and distinctive segment of the pediatric population that includes children of non-White racial and ethnic groups with increased pigmentation including individuals of Asian, Hispanic/LatinX, African, Native American, Pacific Island descent, indigenous people among others with overlap in particular individuals, and mixtures thereof. The discipline of pediatric skin of color can be challenging with difficulty in diagnosis of common conditions due to underlying pigmentation, variations in common hair styling practices, and differences in demographics of cutaneous disease. Whereas some conditions are more common in children of color, other conditions have nuances in clinical appearance and therapeutics with regard to skin color. This article, the second of the series, focuses on inflammatory skin disease nuances, melanocytic disorders, and hypopigmented mycosis fungoides.
Collapse
Affiliation(s)
- Krystal N Mitchell
- Department of Dermatology, Icahn School of Medicine at Mt Sinai, New York, NY, USA
| | - Yong Kwang Tay
- Department of Dermatology, Changi General Hospital, Singapore, Singapore
| | - Candrice R Heath
- Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Nanette B Silverberg
- Department of Dermatology, Icahn School of Medicine at Mt Sinai, New York, NY, USA
- Department of Pediatrics, Icahn School of Medicine at Mt Sinai, New York, NY, USA
| |
Collapse
|
4
|
Zhou X, Han X, Lyu SC, Bunning B, Kost L, Chang I, Cao S, Sampath V, Nadeau KC. Targeted DNA methylation profiling reveals epigenetic signatures in peanut allergy. JCI Insight 2021; 6:143058. [PMID: 33571165 PMCID: PMC8026193 DOI: 10.1172/jci.insight.143058] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 02/10/2021] [Indexed: 12/14/2022] Open
Abstract
DNA methylation (DNAm) has been shown to play a role in mediating food allergy; however, the mechanism by which it does so is poorly understood. In this study, we used targeted next-generation bisulfite sequencing to evaluate DNAm levels in 125 targeted highly informative genomic regions containing 602 CpG sites on 70 immune-related genes to understand whether DNAm can differentiate peanut allergy (PA) versus nonallergy (NA). We found PA-associated DNAm signatures associated with 12 genes (7 potentially novel to food allergy, 3 associated with Th1/Th2, and 2 associated with innate immunity), as well as DNAm signature combinations with superior diagnostic potential compared with serum peanut–specific IgE for PA versus NA. Furthermore, we found that, following peanut protein stimulation, peripheral blood mononuclear cell (PBMCs) from PA participants showed increased production of cognate cytokines compared with NA participants. The varying responses between PA and NA participants may be associated with the interaction between the modification of DNAm and the interference of environment. Using Euclidean distance analysis, we found that the distances of methylation profile comprising 12 DNAm signatures between PA and NA pairs in monozygotic (MZ) twins were smaller than those in randomly paired genetically unrelated individuals, suggesting that PA-related DNAm signatures may be associated with genetic factors.
Collapse
|
5
|
Ogonowska P, Gilaberte Y, Barańska-Rybak W, Nakonieczna J. Colonization With Staphylococcus aureus in Atopic Dermatitis Patients: Attempts to Reveal the Unknown. Front Microbiol 2021; 11:567090. [PMID: 33505363 PMCID: PMC7830525 DOI: 10.3389/fmicb.2020.567090] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 12/14/2020] [Indexed: 12/14/2022] Open
Abstract
Atopic dermatitis (AD) patients are massively colonized with Staphylococcus aureus (S. aureus) in lesional and non-lesional skin. A skin infection may become systemic if left untreated. Of interest, the incidence of multi-drug resistant S. aureus (MRSA) in AD patients is higher as compared to a healthy population, which makes treatment even more challenging. Information on the specific genetic background of S. aureus accompanying and/or causing AD flares would be of great importance in terms of possible treatment option development. In this review, we summarized the data on the prevalence of S. aureus in general in AD skin, and the prevalence of specific clones that might be associated with flares of eczema. We put our special interest in the presence and role of staphylococcal enterotoxins as important virulence factors in the epidemiology of AD-derived S. aureus. Also, we summarize the present and potentially useful future anti-staphylococcal treatment.
Collapse
Affiliation(s)
- Patrycja Ogonowska
- Laboratory of Molecular Diagnostics, Intercollegiate Faculty of Biotechnology University of Gdańsk and Medical University of Gdańsk, Gdańsk, Poland
| | - Yolanda Gilaberte
- Department of Dermatology, University Hospital Miguel Servet, Zaragoza, Spain
| | - Wioletta Barańska-Rybak
- Department of Dermatology, Venereology and Allergology, Medical University of Gdańsk, Gdańsk, Poland
| | - Joanna Nakonieczna
- Laboratory of Molecular Diagnostics, Intercollegiate Faculty of Biotechnology University of Gdańsk and Medical University of Gdańsk, Gdańsk, Poland
| |
Collapse
|
6
|
Palmitoyl Acyltransferase Activity of ZDHHC13 Regulates Skin Barrier Development Partly by Controlling PADi3 and TGM1 Protein Stability. J Invest Dermatol 2019; 140:959-970.e3. [PMID: 31669413 DOI: 10.1016/j.jid.2019.09.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 09/17/2019] [Accepted: 09/23/2019] [Indexed: 02/08/2023]
Abstract
Deficiency of the palmitoyl-acyl transferase ZDHHC13 compromises skin barrier permeability and renders mice susceptible to environmental bacterial infection and inflammatory dermatitis. It had been unclear how the lack of ZDHHC13 proteins resulted in cutaneous abnormalities. In this study, we first demonstrate that enzymatic palmitoylation activity, rather than protein scaffolding, by ZDHHC13 is essential for skin barrier integrity, showing that knock-in mice bearing an enzymatically dead DQ-to-AA ZDHHC13 mutation lost their hair after weaning cyclically, recapitulating knockout phenotypes of skin inflammation and dermatitis. To establish the ZDHHC13 substrates responsible for skin barrier development, we employed quantitative proteomic approaches to identify protein molecules whose palmitoylation is tightly controlled by ZDHHC13. We identified over 300 candidate proteins that could be classified into four biological categories: immunological disease, skin development and function, dermatological disease, and lipid metabolism. Palmitoylation of three of these candidates-loricrin, peptidyl arginine deiminase type III, and keratin fiber crosslinker transglutaminase 1-by ZDHHC13 was confirmed by biochemical assay. Palmitoylation was critical for in vivo protein stability of the latter two candidates. Our findings reveal the importance of protein palmitoylation in skin barrier development, partly by promoting envelope protein crosslinking and the filaggrin processing pathway.
Collapse
|
7
|
Jun M, Wang HY, Lee S, Choi E, Lee H, Choi EH. Differences in Genetic Variations Between Treatable and Recalcitrant Atopic Dermatitis in Korean. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2018; 10:244-252. [PMID: 29676071 PMCID: PMC5911443 DOI: 10.4168/aair.2018.10.3.244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 02/14/2018] [Accepted: 02/18/2018] [Indexed: 12/15/2022]
Abstract
Purpose Variations in barrier- or immune response-related genes are closely related to the development of atopic dermatitis (AD). This study was designed to identify genetic variations and clinical features to predict ‘recalcitrant AD.’ Methods AD patients were classified as treatable and recalcitrant. Treatable AD patients showed satisfactory clinical improvement with basic and topical treatments. Recalcitrant AD patients used systemic immune-suppressants for over 4 weeks as they had not shown clinical improvement with basic and topical treatments. The frequency of gene variations in barrier- (FLG 3321delA, FLG K4022X, KLK7, SPINK 1156, SPINK 1188, SPINK 2475) and immune response- (DEFB1, KDR, IL-5RA, IL-9, and IL-12RB1a, b) related genes were compared between each AD group and the controls. Results Of all, 249 treatable AD and 32 recalcitrant AD were identified. Heterozygous mutations (Hetero) in KLK7 was more frequent in recalcitrant AD patients than treatable AD, without statistical significance. Hetero in DEFB1 was more frequent in treatable AD patients. However, no other significant genetic differences between treatable and recalcitrant AD was observed. Instead, higher initial Eczema Area Severity Index (EASI) score, serum immunoglobulin E (IgE) level, allergen specific IgE for house dust mites, and family history of atopic diseases were associated with recalcitrant AD with statistical significance. Conclusions According to our study, no genetic variation to predict recalcitrant AD was identified, suggesting that clinical manifestation, rather than genetic variations of AD patients is more likely to be an important factor in predicting the prognosis of AD. Further large-scale studies on the correlation between genetic variation and recalcitrant AD are needed.
Collapse
Affiliation(s)
- Myungsoo Jun
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Hye Young Wang
- Optipharm, Inc., Wonju Eco Environmental Technology Center, Wonju, Korea
| | - Solam Lee
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Eunhee Choi
- Institute of Lifestyle Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Hyeyoung Lee
- Department of Biomedical Laboratory Science, Yonsei University College of Health Sciences, Wonju, Korea
| | - Eung Ho Choi
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Korea.
| |
Collapse
|
8
|
Cardona ID, Stillman L, Jain N. Does bathing frequency matter in pediatric atopic dermatitis? Ann Allergy Asthma Immunol 2017; 117:9-13. [PMID: 27371966 DOI: 10.1016/j.anai.2016.05.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 05/11/2016] [Accepted: 05/17/2016] [Indexed: 12/18/2022]
Affiliation(s)
| | | | - Neal Jain
- Maricopa Integrated Health System, Phoenix, Arizona
| |
Collapse
|
9
|
Marichal T, Gaudenzio N, El Abbas S, Sibilano R, Zurek O, Starkl P, Reber LL, Pirottin D, Kim J, Chambon P, Roers A, Antoine N, Kawakami Y, Kawakami T, Bureau F, Tam SY, Tsai M, Galli SJ. Guanine nucleotide exchange factor RABGEF1 regulates keratinocyte-intrinsic signaling to maintain skin homeostasis. J Clin Invest 2016; 126:4497-4515. [PMID: 27820702 DOI: 10.1172/jci86359] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 09/29/2016] [Indexed: 01/07/2023] Open
Abstract
Epidermal keratinocytes form a structural and immune barrier that is essential for skin homeostasis. However, the mechanisms that regulate epidermal barrier function are incompletely understood. Here we have found that keratinocyte-specific deletion of the gene encoding RAB guanine nucleotide exchange factor 1 (RABGEF1, also known as RABEX-5) severely impairs epidermal barrier function in mice and induces an allergic cutaneous and systemic phenotype. RABGEF1-deficient keratinocytes exhibited aberrant activation of the intrinsic IL-1R/MYD88/NF-κB signaling pathway and MYD88-dependent abnormalities in expression of structural proteins that contribute to skin barrier function. Moreover, ablation of MYD88 signaling in RABGEF1-deficient keratinocytes or deletion of Il1r1 restored skin homeostasis and prevented development of skin inflammation. We further demonstrated that epidermal RABGEF1 expression is reduced in skin lesions of humans diagnosed with either atopic dermatitis or allergic contact dermatitis as well as in an inducible mouse model of allergic dermatitis. Our findings reveal a key role for RABGEF1 in dampening keratinocyte-intrinsic MYD88 signaling and sustaining epidermal barrier function in mice, and suggest that dysregulation of RABGEF1 expression may contribute to epidermal barrier dysfunction in allergic skin disorders in mice and humans. Thus, RABGEF1-mediated regulation of IL-1R/MYD88 signaling might represent a potential therapeutic target.
Collapse
|
10
|
Jung SM, Yoon GH, Lee HC, Jung MH, Yu SI, Yeon SJ, Min SK, Kwon YS, Hwang JH, Shin HS. Thermodynamic Insights and Conceptual Design of Skin-Sensitive Chitosan Coated Ceramide/PLGA Nanodrug for Regeneration of Stratum Corneum on Atopic Dermatitis. Sci Rep 2015; 5:18089. [PMID: 26666701 PMCID: PMC4678456 DOI: 10.1038/srep18089] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 11/11/2015] [Indexed: 01/22/2023] Open
Abstract
Atopic dermatitis (AD) is a complex skin disease primarily characterized by psoriasis of the stratum corneum. AD drugs have usually been used in acidic and hydrophilic solvents to supply moisture and prevent lipid defects. Ceramide is a typical treatment agent to regenerate the stratum corneum and relieve symptoms of AD. However, ceramide has limitation on direct use for skin because of its low dispersion properties in hydrophilic phase and side effects at excessive treatment. In this study, ceramide imbedded PLGA nanoparticles were developed with chitosan coating (Chi-PLGA/Cer) to overcome this problem. The chitosan coating enhanced initial adherence to the skin and prevented the initial burst of ceramide, but was degraded by the weakly acidic nature of skin, resulting in controlled release of ceramide with additional driving force of the squeezed PLGA nanoparticles. Additionally, the coating kinetics of chitosan were controlled by manipulating the reaction conditions and then mathematically modeled. The Chi-PLGA/Cer was not found to be cytotoxic and ceramide release was controlled by pH, temperature, and chitosan coating. Finally, Chi-PLGA/Cer was demonstrated to be effective at stratum corneum regeneration in a rat AD model. Overall, the results presented herein indicated that Chi-PLGA/Cer is a novel nanodrug for treatment of AD.
Collapse
Affiliation(s)
- Sang-Myung Jung
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Gwang Heum Yoon
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Hoo Chul Lee
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Moon Hee Jung
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Sun Il Yu
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Seung Ju Yeon
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Seul Ki Min
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Yeo Seon Kwon
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Jin Ha Hwang
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| | - Hwa Sung Shin
- Department of Biological Engineering, Inha University, Incheon, 402-751, Korea
| |
Collapse
|
11
|
|
12
|
van Smeden J, Janssens M, Gooris GS, Bouwstra JA. The important role of stratum corneum lipids for the cutaneous barrier function. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1841:295-313. [PMID: 24252189 DOI: 10.1016/j.bbalip.2013.11.006] [Citation(s) in RCA: 334] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 11/08/2013] [Accepted: 11/10/2013] [Indexed: 01/28/2023]
Abstract
The skin protects the body from unwanted influences from the environment as well as excessive water loss. The barrier function of the skin is located in the stratum corneum (SC). The SC consists of corneocytes embedded in a lipid matrix. This lipid matrix is crucial for the lipid skin barrier function. This paper provides an overview of the reported SC lipid composition and organization mainly focusing on healthy and diseased human skin. In addition, an overview is provided on the data describing the relation between lipid modulations and the impaired skin barrier function. Finally, the use of in vitro lipid models for a better understanding of the relation between the lipid composition, lipid organization and skin lipid barrier is discussed. This article is part of a Special Issue entitled The Important Role of Lipids in the Epidermis and their Role in the Formation and Maintenance of the Cutaneous Barrier. This article is part of a Special Issue entitled The Important Role of Lipids in the Epidermis and their Role in the Formation and Maintenance of the Cutaneous Barrier. Guest Editors: Kenneth R. Feingold and Peter Elias.
Collapse
Affiliation(s)
- J van Smeden
- Department of Drug Delivery Technology, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - M Janssens
- Department of Drug Delivery Technology, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - G S Gooris
- Department of Drug Delivery Technology, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - J A Bouwstra
- Department of Drug Delivery Technology, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands.
| |
Collapse
|
13
|
Perusquía-Ortiz A, Oji V, Sauerland M, Tarinski T, Zaraeva I, Seller N, Metze D, Aufenvenne K, Hausser I, Traupe H. Complete filaggrin deficiency in ichthyosis vulgaris is associated with only moderate changes in epidermal permeability barrier function profile. J Eur Acad Dermatol Venereol 2013; 27:1552-8. [DOI: 10.1111/jdv.12079] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Accepted: 11/21/2012] [Indexed: 11/28/2022]
Affiliation(s)
| | - V. Oji
- Department of Dermatology; University of Münster; Münster Germany
| | - M.C. Sauerland
- Institute of Biostatistics and Clinical Research; University of Münster; Münster Germany
| | - T. Tarinski
- Department of Dermatology; University of Münster; Münster Germany
| | - I. Zaraeva
- Department of Dermatology; University of Münster; Münster Germany
| | - N. Seller
- Department of Dermatology; University of Münster; Münster Germany
| | - D. Metze
- Department of Dermatology; University of Münster; Münster Germany
| | - K. Aufenvenne
- Department of Dermatology; University of Münster; Münster Germany
| | - I. Hausser
- Department of Dermatology; University of Heidelberg; Heidelberg Germany
| | - H. Traupe
- Department of Dermatology; University of Münster; Münster Germany
| |
Collapse
|
14
|
Batta P, Tu EY. Atopic Keratoconjunctivitis. OCULAR SURFACE DISEASE: CORNEA, CONJUNCTIVA AND TEAR FILM 2013:103-110. [DOI: 10.1016/b978-1-4557-2876-3.00015-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
|
15
|
Silverberg JI, Silverberg NB. Atopic Dermatitis: Update on Pathogenesis and Comorbidities. CURRENT DERMATOLOGY REPORTS 2012. [DOI: 10.1007/s13671-012-0021-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
16
|
Vitamin D Receptor Activation Improves Allergen-Triggered Eczema in Mice. J Invest Dermatol 2012; 132:330-6. [DOI: 10.1038/jid.2011.296] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
17
|
Takase T, Hirai Y. Identification of the C-terminal tail domain of AHF/trichohyalin as the critical site for modulation of the keratin filamentous meshwork in the keratinocyte. J Dermatol Sci 2011; 65:141-8. [PMID: 22261007 DOI: 10.1016/j.jdermsci.2011.12.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 11/21/2011] [Accepted: 12/20/2011] [Indexed: 11/30/2022]
Abstract
BACKGROUND AHF/trichohyalin is a large structural protein abundant in the inner root sheath (IRS) of anagenic hair follicles, which has been thought to mediate the keratin filamentous assembly. However, its functional mechanism is largely unknown. OBJECTIVE This study aimed at the identification of the key domain in AHF for keratin association and the establishment of a plausible mechanism for the modulation of the keratin meshwork. METHODS Several keratinocyte cell lines were introduced with the full length or several mutants of AHF, together with IRS-specific keratin krt31, and the profile of the AHF granules and the cellular behaviors were carefully analyzed. RESULTS Full length of AHF formed small round granules that clearly bound to and aligned on the exogenous keratin filaments in the keratinocytes, severely affected cellular growth, mobility and shape. Intriguingly, the removal of only 6 amino acids around the C-terminal tail of AHF resulted not only in the complete loss of its keratin adherent ability but also in a dramatic enlargement of the granules. CONCLUSION We propose a model for cytoskeletal modulation in the IRS of anagenic hair follicles: AHF latches onto the keratin bundles by its C-terminus and rearranges the keratin meshwork by intrinsic cohesive activity for the granule formation.
Collapse
Affiliation(s)
- Takahisa Takase
- Department of Bioscience, School of Science and Technology, Kwansei Gakuin University, Sanda, Japan
| | | |
Collapse
|
18
|
Cai SCS, Chen H, Koh WP, Common JEA, van Bever HP, McLean WHI, Lane EB, Giam YC, Tang MBY. Filaggrin mutations are associated with recurrent skin infection in Singaporean Chinese patients with atopic dermatitis. Br J Dermatol 2011; 166:200-3. [PMID: 21790526 DOI: 10.1111/j.1365-2133.2011.10541.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Loss-of-function (null) mutations within the filaggrin (FLG) gene are a strong risk factor for atopic dermatitis (AD). We hypothesized that the absence or reduction of the filaggrin protein could compromise skin barrier and increase patients' susceptibility to recurrent skin infection. OBJECTIVES To investigate the association between FLG-null mutations and the risk of recurrent skin infection among a series of patients with AD in Singapore. METHODS This study included 228 Singaporean Chinese patients with AD with at least 1year of follow-up at the time of recruitment between January 2008 and December 2009 at the National Skin Centre in Singapore. Each patient had their medical records reviewed for history of skin infection in the preceding year and was genotyped for 22 FLG-null mutations. RESULTS Compared with those without the FLG-null mutations, patients with AD who had FLG mutation(s) had approximately a seven times increased risk of more than four episodes of skin infection requiring antibiotics in the past year (odds ratio 6·74; 95% confidence interval 2·29-19·79). This risk was much greater in those with mild or moderate disease, and was present in both users and nonusers of oral steroids. CONCLUSION This study highlights a novel association between FLG-null mutations and an increased susceptibility to recurrent bacterial skin infection among patients with AD.
Collapse
Affiliation(s)
- S C S Cai
- Duke-National University of Singapore Graduate Medical School, 8 College Road, Singapore 169857, Singapore
| | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Crack LR, Chan HW, McPherson T, Ogg GS. Phenotypic analysis of perennial airborne allergen-specific CD4+ T cells in atopic and non-atopic individuals. Clin Exp Allergy 2011; 41:1555-67. [PMID: 21729183 DOI: 10.1111/j.1365-2222.2011.03819.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Accumulating evidence suggests that T cells play an important role in the pathogenesis of atopic dermatitis (AD); yet, little is known of the differentiation status of CD4+ T cells specific for common environmental allergens, such as the major cat allergen, Fel d 1. OBJECTIVE To determine the frequency, differentiation phenotype and function of circulating Fel d 1-specific CD4+ T cells in adult individuals with severe persistent AD in comparison with healthy controls. METHODS Using HLA class II tetrameric complexes based on a HLA-DPB1*0401-restricted Fel d 1 epitope, ex vivo and cultured T cell frequency and phenotype were analysed in individuals with AD and healthy controls. Cytokine secretion was measured by ex vivo and cultured IL-4 and IFN-γ ELISpots. RESULTS Ex vivo Fel d 1-specific DPB1*0401-restricted CD4+ T cells in both atopics and non-atopics express high levels of CCR7, CD62L, CD27 and CD28, placing the cells largely within the central memory subgroup. However, the functional phenotype was distinct, with greater IL-4 production from the cells derived from atopics, which correlated with disease severity. CONCLUSIONS AND CLINICAL RELEVANCE Circulating Fel d 1-specific DPB1*0401-restricted CD4+ T cells in both atopic and non-atopic donors maintain a central memory phenotype; however in atopics, the cells had greater Th2 effector function, compatible with a disease model of altered antigen delivery in atopic individuals.
Collapse
Affiliation(s)
- L R Crack
- MRC Human Immunology Unit, University of Oxford, Weatherall Institute of Molecular Medicine, Oxford, UK
| | | | | | | |
Collapse
|
20
|
Segat L, Guimarães RL, Brandão LAC, Rocha CRC, Zanin V, Trevisiol C, de Lima Filho JL, Crovella S. Beta defensin-1 gene (DEFB1) polymorphisms are not associated with atopic dermatitis in children and adolescents from northeast Brazil (Recife, Pernambuco). Int J Dermatol 2010; 49:653-7. [PMID: 20618470 DOI: 10.1111/j.1365-4632.2009.04343.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Atopic dermatitis (AD) is a common inflammatory skin disease resulting from the interplay between environmental, immunological and genetic factors. In our study, we investigated the role of three single nucleotide polymorphisms (SNPs) at 5'-UTR of DEFB1 gene, encoding for the human beta defensin-1, on the susceptibility to develop AD in a group of Brazilian children and adolescents. METHODS Three SNPs, -20 G/A (rs11362), -44 C/G (rs1800972), and -52 G/A (rs1799946) at 5'-UTR of DEFB1 gene were genotyped in two groups of children and adolescents, one affected by AD (96 subjects), the other healthy (191 individuals), from northeast Brazil. RESULTS -44 C/G frequencies were comparable between the two groups. The -20 GG genotype was more frequent in AD subjects than in healthy controls; the -52 GG, conversely, was more frequent in healthy controls than in AD. However, both these differences did not reach statistical significance. Also, association between SNPs and AD severity has been shown. The analysis of DEFB1 haplotypes did not highlight any association of the three SNPs with AD development or disease severity. CONCLUSIONS Our results seem to exclude a role for the -44 C/G DEFB1 SNPs on the pathogenesis and severity of AD, while for the -20 C/G and -52 G/A, even if not statistically significant, we evidenced a slight trend for susceptibility (-20 GG) and protection (-52 GG) for the development of AD. However, as controversial findings have been reported in the literature, the role of DEFB1 in the development of AD and in the severity of the phenotype deserves further investigation.
Collapse
Affiliation(s)
- Ludovica Segat
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Recife, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Association between varicella zoster virus infection and atopic dermatitis in early and late childhood: A case-control study. J Allergy Clin Immunol 2010; 126:300-5. [DOI: 10.1016/j.jaci.2010.05.041] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2010] [Revised: 05/21/2010] [Accepted: 05/26/2010] [Indexed: 12/27/2022]
|
22
|
Marsella R, Samuelson D. Unravelling the skin barrier: a new paradigm for atopic dermatitis and house dust mites. Vet Dermatol 2010; 20:533-40. [PMID: 20178491 DOI: 10.1111/j.1365-3164.2009.00809.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Atopic dermatitis (AD) is a chronic relapsing inflammatory skin disease caused by complex interactions between genetics and environmental factors. In human beings, impairment of the skin barrier is demonstrated and thought to be responsible for enhanced penetration of allergens and increased risk for allergic sensitization. Once inflammation is triggered, further impairment of the skin barrier occurs, leading to self-perpetuating cycles of sensitizations. Canine AD appears to share many similarities with the human counterpart, clinically and immunologically. It is hypothesized that a primary defect of skin barrier function also exists in subsets of atopic dogs (e.g. in an experimental model using high IgE-producing beagles), particularly in young dogs, and in sites predisposed to the development of lesions. This impairment is present in clinically normal skin, worsens with development of lesions and can be quantified by measurement of transepidermal water loss. Therefore, the distribution of lesions in AD may be linked to a primary skin barrier defect in those sites and not simply due to contact with allergens, and increased susceptibility to penetration of allergen may exist early in life. Ultrastructurally, transmission electron microscopy reveals that clinically normal skin in atopic dogs has abnormalities in lamellar body secretion and extracellular lamellar bilayer structure when compared with normal dogs. Development of lesions worsens these changes (e.g. widening of intercellular spaces, release of lamellar bodies, and disorganization of lipid lamellae). It is proposed that the paradigm of canine AD as primarily due to immunologic aberration ('inside/outside') should be shifted to include a primary defect in barrier function ('outside/inside').
Collapse
Affiliation(s)
- Rosanna Marsella
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA.
| | | |
Collapse
|
23
|
Bibliography. Current world literature. Nose and paranasal sinuses. Curr Opin Otolaryngol Head Neck Surg 2010; 18:60-3. [PMID: 20068410 DOI: 10.1097/moo.0b013e328335385c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
24
|
Yu B, Shao Y, Zhang J, Dong X, Liu W, Yang H, Liu L, Li M, Yue C, Fang Z, Zhang C, Hu X, Chen B, Wu Q, Chen Y, Zhang W, Wan J. Polymorphisms in human histamine receptor H4 gene are associated with atopic dermatitis. Br J Dermatol 2010; 162:1038-43. [DOI: 10.1111/j.1365-2133.2010.09675.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
25
|
Abstract
PURPOSE OF REVIEW This article reviews recent insights surrounding the etiology and pathogenesis of chronic rhinosinusitis. In particular, we highlight the increasing recognition of host-mediated mechanisms in driving mucosal inflammation. RECENT FINDINGS Published differences between epithelium from patients with chronic rhinosinusitis and normal controls can be classified into several broad categories. Alterations are reported in the various components of the epithelial innate immune system including epithelial-expressed pattern-recognition receptors (PRRs) and the levels of antimicrobial innate immune effector molecules. Other studies demonstrate differences in the proteins involved in maintaining epithelial barrier integrity. Finally, recent studies show in chronic rhinosinusitis that epithelial-derived cytokines, chemokines and inducible surface proteins are involved in recruiting and activating cells of the adaptive immune system. CONCLUSION The sinonasal epithelium provides a mechanical and innate immune barrier to a diverse array of environmental agents. This barrier also plays a key role in regulating the acquired mucosal immune response in the nose. Recent studies suggest that defects in this barrier may foster development of chronic sinonasal inflammation in response to environmental agents, and pathogenic or commensal organisms. The ability to dissect and analyze defects in the inflammatory response in rhinosinusitis may help identify novel targets for drug development.
Collapse
Affiliation(s)
- Bruce K. Tan
- Department of Otolaryngology, Head and Neck Surgery, Northwestern University, Chicago, Illinois, USA
| | - Robert P. Schleimer
- Division of Allergy and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Robert C. Kern
- Department of Otolaryngology, Head and Neck Surgery, Northwestern University, Chicago, Illinois, USA
| |
Collapse
|
26
|
Current world literature. Curr Opin Allergy Clin Immunol 2009; 9:482-8. [PMID: 19690478 DOI: 10.1097/aci.0b013e3283312f84] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
27
|
Marenholz I, Lee Y. Genetik des atopischen Ekzems. MED GENET-BERLIN 2009. [DOI: 10.1007/s11825-009-0198-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Zusammenfassung
Das atopische Ekzem (AE) – auch atopische Dermatitis – ist eine chronisch-entzündliche Erkrankung der Haut, zu deren Charakteristika starker Juckreiz, eine gestörten Hautbarriere und die Bildung von IgE-Antikörpern (Immunglobulin E) gegen Umweltallergene zählen. Das AE ist eine multifaktoriell-polygene Erkrankung, die genetische Prädisposition und der Einfluss von Umweltfaktoren gelten seit langem als entscheidende Auslöser. Dennoch stellt die Aufdeckung der Krankheitsursachen aufgrund der Vielzahl der beteiligten Gene und Umwelteinflüsse sowie deren möglicher Interaktionen eine enorme Herausforderung für die Wissenschaft dar. Der vorliegende Beitrag gibt einen Überblick über den aktuellen Stand der Genetik des AE, über jüngste Erfolge und mögliche Probleme. Vor allem die Identifizierung einer genetischen Ursache des Hautbarrieredefekts hat unser Verständnis des AE in den letzten Jahren entscheidend vorangebracht und könnte zu neuen Ansätzen in dessen Prävention und Therapie führen.
Collapse
Affiliation(s)
- I. Marenholz
- Aff1_198 grid.6363.0 0000000122184662 Klinik für Pädiatrie mit Schwerpunkt Pneumologie und Immunologie Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum Augustenburger Platz 1 13353 Berlin Deutschland
| | - Y.A. Lee
- Aff1_198 grid.6363.0 0000000122184662 Klinik für Pädiatrie mit Schwerpunkt Pneumologie und Immunologie Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum Augustenburger Platz 1 13353 Berlin Deutschland
| |
Collapse
|
28
|
Brown SJ, Relton CL, Liao H, Zhao Y, Sandilands A, McLean WHI, Cordell HJ, Reynolds NJ. Filaggrin haploinsufficiency is highly penetrant and is associated with increased severity of eczema: further delineation of the skin phenotype in a prospective epidemiological study of 792 school children. Br J Dermatol 2009; 161:884-9. [PMID: 19681860 PMCID: PMC2883069 DOI: 10.1111/j.1365-2133.2009.09339.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Background Null mutations within the filaggrin gene (FLG) cause ichthyosis vulgaris and are associated with atopic eczema. However, the dermatological features of filaggrin haploinsufficiency have not been clearly defined. Objectives This study investigated the genotype–phenotype association between detailed skin phenotype and FLG genotype data in a population-based cohort of children. Methods Children (n= 792) aged 7–9 years were examined by a dermatologist. Features of ichthyosis vulgaris, atopic eczema and xerosis were recorded and eczema severity graded using the Three Item Severity score. Each child was genotyped for the six most prevalent FLG null mutations (R501X, 2282del4, R2447X, S3247X, 3702delG, 3673delC). Fisher’s exact test was used to compare genotype frequencies in phenotype groups; logistic regression analysis was used to estimate odds ratios and penetrance of the FLG null genotype and a permutation test performed to investigate eczema severity in different genotype groups. Results Ten children in this cohort had ichthyosis vulgaris, of whom five had mild–moderate eczema. The penetrance of FLG null mutations with respect to flexural eczema was 55·6% in individuals with two mutations, 16·3% in individuals with one mutation and 14·2% in wild-type individuals. Summating skin features known to be associated with FLG null mutations (ichthyosis, keratosis pilaris, palmar hyperlinearity and flexural eczema) showed a penetrance of 100% in children with two FLG mutations, 87·8% in children with one FLG mutation and 46·5% in wild-type individuals (P< 0·0001, Fisher exact test). FLG null mutations were associated with more severe eczema (P= 0·0042) but the mean difference was only 1–2 points in severity score. Three distinct patterns of palmar hyperlinearity were observed and these are reported for the first time. Conclusions Filaggrin haploinsufficiency appears to be highly penetrant when all relevant skin features are included in the analysis. FLG null mutations are associated with more severe eczema, but the effect size is small in a population setting.
Collapse
Affiliation(s)
- S J Brown
- Department of Dermatology, Royal Victoria Infirmary, Newcastle upon Tyne, UK.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Nograles KE, Zaba LC, Shemer A, Fuentes-Duculan J, Cardinale I, Kikuchi T, Ramon M, Bergman R, Krueger JG, Guttman-Yassky E. IL-22-producing "T22" T cells account for upregulated IL-22 in atopic dermatitis despite reduced IL-17-producing TH17 T cells. J Allergy Clin Immunol 2009; 123:1244-52.e2. [PMID: 19439349 PMCID: PMC2874584 DOI: 10.1016/j.jaci.2009.03.041] [Citation(s) in RCA: 467] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Revised: 03/26/2009] [Accepted: 03/30/2009] [Indexed: 12/19/2022]
Abstract
BACKGROUND Psoriasis and atopic dermatitis (AD) are common inflammatory skin diseases. An upregulated TH17/IL-23 pathway was demonstrated in psoriasis. Although potential involvement of TH17 T cells in AD was suggested during acute disease, the role of these cells in chronic AD remains unclear. OBJECTIVE To examine differences in IL-23/TH17 signal between these diseases and establish relative frequencies of T-cell subsets in AD. METHODS Skin biopsies and peripheral blood were collected from patients with chronic AD (n = 12) and psoriasis (n = 13). Relative frequencies of CD4+ and CD8+ T-cell subsets within these 2 compartments were examined by intracellular cytokine staining and flow cytometry. RESULTS In peripheral blood, no significant difference was found in percentages of different T-cell subsets between these diseases. In contrast, psoriatic skin had significantly increased frequencies of TH1 and TH17 T cells compared with AD, whereas TH2 T cells were significantly elevated in AD. Distinct IL-22-producing CD4+ and CD8+ T-cell populations were significantly increased in AD skin compared with psoriasis. IL-22+CD8+ T-cell frequency correlated with AD disease severity. CONCLUSION Our data established that T cells could independently express IL-22 even with low expression levels of IL-17. This argues for a functional specialization of T cells such that "T17" and "T22" T-cells may drive different features of epidermal pathology in inflammatory skin diseases, including induction of antimicrobial peptides for "T17" T cells and epidermal hyperplasia for "T22" T-cells. Given the clinical correlation with disease severity, further characterization of "T22" T cells is warranted, and may have future therapeutic implications.
Collapse
Affiliation(s)
- Kristine E. Nograles
- Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY
| | - Lisa C. Zaba
- Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY
| | - Avner Shemer
- Department of Dermatology, Tel-Hashomer Medical Center, Ramat-Gan, Israel
| | | | - Irma Cardinale
- Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY
| | - Toyoko Kikuchi
- Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY
| | - Michal Ramon
- Department of dermatology, Rambam Medical Center and the Technion, Haifa, Israel
| | - Reuven Bergman
- Department of dermatology, Rambam Medical Center and the Technion, Haifa, Israel
| | - James G. Krueger
- Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY
| | - Emma Guttman-Yassky
- Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY
- Department of Dermatology, Weill Cornell Medical College, Cornell University, NY, NY, USA
| |
Collapse
|
30
|
Molin S, Vollmer S, Weiss EH, Ruzicka T, Prinz JC. Filaggrin mutations may confer susceptibility to chronic hand eczema characterized by combined allergic and irritant contact dermatitis. Br J Dermatol 2009; 161:801-7. [PMID: 19538184 DOI: 10.1111/j.1365-2133.2009.09245.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND The pathogenesis of chronic hand eczema (CHE) is multifactorial and involves both endogenous predisposition and environmental triggers. OBJECTIVES Filaggrin is a structural protein of the cornified envelope and important for the formation of the epidermal skin barrier. The aim of this investigation was to evaluate the role of mutations in the filaggrin gene (FLG) in the development of CHE. METHODS In total, 122 German patients with clearly defined CHE subtypes were screened for the FLG variants R501X and 2282del4 by polymerase chain reaction and restriction enzyme digest analysis. The prevalence of these variants in CHE patients was compared with that in 95 healthy individuals. RESULTS Overall, allele frequency and the number of mutation carriers were similar in both the CHE and control groups. When classified according to clearly defined CHE subtypes, however, the nonfunctional FLG variants showed an association with CHE involving an aetiological combination of contact allergy and irritant factors [P = 0.04; P (exact test) = 0.06; P (difference in rates) = 0.09; 95% confidence interval (CI) 0-56.8)], or with excessive daily exposure to water and irritants [P = 0.003; P (difference in rates) < 0.001; 95% CI 29.3-67.9]. CONCLUSION Heterozygosity for nonfunctional mutations in the FLG gene may contribute to the manifestation and maintenance of a particular CHE subtype that is characterized by the combination of allergic and irritant contact dermatitis.
Collapse
Affiliation(s)
- S Molin
- Department of Dermatology, Ludwig-Maximilians-University, D-80337 Munich, Germany
| | | | | | | | | |
Collapse
|
31
|
Werfel T. The role of leukocytes, keratinocytes, and allergen-specific IgE in the development of atopic dermatitis. J Invest Dermatol 2009; 129:1878-91. [PMID: 19357709 DOI: 10.1038/jid.2009.71] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review provides an overview of the inflammatory mechanisms and immunological aspects specific to atopic dermatitis. The review discusses publications on the roles of different T-cell subsets (that is, T helper 1 (Th1), Th2, T-regulatory, and Th17 cells), myeloid and plasmacytoid dendritic cells, and eosinophils. A further focus lies on keratinocyte-T-cell interactions, which may be of particular relevance in eczema. Mechanisms in innate and adaptive immunity that result in susceptibility to skin infections and in hyperreactivity to environmental stimuli, influencing the course and severity of atopic dermatitis, are summarized. Because the Journal of Investigative Dermatology has recently published reviews of specific features of barrier defects, defects in innate immunity, and, in this issue, genetics, these topics are only briefly discussed here in the context of immunology of atopic dermatitis.
Collapse
Affiliation(s)
- Thomas Werfel
- Department of Immunodermatology and Allergy Research, Hannover Medical School, Hannover, Germany.
| |
Collapse
|
32
|
Watkins SA, Maibach HI. The hardening phenomenon in irritant contact dermatitis: an interpretative update. Contact Dermatitis 2009; 60:123-30. [DOI: 10.1111/j.1600-0536.2009.01507.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
33
|
Absorption of chemicals through compromised skin. Int Arch Occup Environ Health 2009; 82:677-88. [PMID: 19238423 DOI: 10.1007/s00420-009-0405-x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2008] [Accepted: 02/04/2009] [Indexed: 10/21/2022]
Abstract
Skin is an important route of entry for many chemicals in the work place. To assess systemic uptake of a chemical in contact with the skin, quantitative information on dermal absorption rates of chemicals is needed. Absorption rates are mainly obtained from studies performed with intact, healthy skin. At the work place, however, a compromised skin barrier, although not necessarily visible is common, e.g. due to physical and chemical damage. As reviewed in this article, there are several lines of evidence that reduced integrity of the skin barrier may increase dermal absorption of chemicals in the occupational setting. An impaired skin barrier might lead not only to enhanced absorption of a specific chemical, but also to entrance of larger molecules such as proteins and nanoparticles which normally are not able to penetrate intact skin. In addition to environmental influences, there is increasing evidence that some individuals have an intrinsically affected skin barrier which will facilitate entrance of chemicals into and through the skin making these persons more susceptible for local as well for systemic toxicity. This review addresses mechanisms of barrier alteration caused by the most common skin-damaging factors in the occupational settings and the consequences for dermal absorption of chemicals. Furthermore, this review emphasizes the importance of maintained barrier properties of the skin.
Collapse
|
34
|
Chiu LS, Ho MSL, Hsu LY, Tang MBY. Prevalence and molecular characteristics of Staphylococcus aureus isolates colonizing patients with atopic dermatitis and their close contacts in Singapore. Br J Dermatol 2009; 160:965-71. [PMID: 19222456 DOI: 10.1111/j.1365-2133.2009.09038.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND Staphylococcus aureus colonization is an established pathogenic factor for disease flare in atopic dermatitis (AD). OBJECTIVES We conducted a study to investigate the colonization of S. aureus in patients with AD and their close contacts in order to evaluate the possibility of intrafamilial transmission. We sought to determine the distribution of the bacterial virulence factors and their correlation with disease severity. METHODS Nasal swabs and skin swabs (patients with AD only) were taken from patients with AD aged 2-21 years and their close contacts, seen at the National Skin Centre from January to March 2007. All S. aureus isolates were typed using multilocus variable-number tandem-repeat fingerprinting (MLVF) and screened for virulence factors via polymerase chain reaction (PCR) analysis. AD severity was determined by the SCORAD index. RESULTS A total of 34 patients with AD and 55 close contacts were recruited. Thirty-one (91%) patients were colonized with S. aureus. Twenty-five (45%) of their close contacts were also colonized, and MLVF showed a high concordance of S. aureus isolates in index patients and their close contacts. On multivariate analysis, patients with a moderate SCORAD were more likely to be colonized by enterotoxin B-positive S. aureus (P = 0.027). No virulence factor was significantly associated with a severe SCORAD. CONCLUSIONS The prevalence of S. aureus colonization was high among patients with AD and their close contacts. However, no predominant isolate of S. aureus was found to be associated with AD. The presence of superantigen B is possibly associated with moderate rather than severe disease in our population.
Collapse
Affiliation(s)
- L S Chiu
- National Skin Centre, 1 Mandalay Road, 308205 Singapore
| | | | | | | |
Collapse
|
35
|
Abstract
Atopic dermatitis is increasing in prevalence and currently affects 15–30% of children in urban areas. Immune dysregulation and an impaired epidermal barrier are important factors in the pathogenesis of this disease. Pruritus and a chronic relapsing remitting course are hallmarks of the disorder, and sleep disturbance can occur in both the patient and family. Preventive interventions include exclusive breastfeeding in the first 4 months of life and withholding solid foods for 6 months. The avoidance of irritants and the use of emollients decrease flares. Topical corticosteroids remain the mainstay of therapy, and should be judiciously utilized. Excessive and inappropriate use must be avoided, as well as ‘steroid phobia’. The topical calcineurin inhibitors can be useful adjuncts. Systemic therapies are available for severe disease, but carry risks of adverse effects.
Collapse
Affiliation(s)
- Joseph Lam
- Clinical Assistant Professor, Department of Pediatrics, University of British Columbia, School of Medicine, British Columbia, Vancouver, Canada
| | - Sheila F Friedlander
- Clinical Professor, Departments of Pediatrics & Medicine (Dermatology), University of California, San Diego School of Medicine, CA, USA
| |
Collapse
|