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Martins D, Pinoteau MA, Leger R. Development of a back-titration assay to quantitate functional lympho-epithelial Kazal-type inhibitors (LEKTI) in skin samples. Anal Biochem 2024; 690:115524. [PMID: 38556114 DOI: 10.1016/j.ab.2024.115524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/18/2024] [Accepted: 03/23/2024] [Indexed: 04/02/2024]
Abstract
The lympho-epithelial Kazal-type inhibitors (LEKTI) are key to control skin turnover, and their absence causes Netherton syndrome. For clinical sample testing of LEKTI-based therapies, a robust analytical method to measure LEKTI-like activity in skin is required. This work reports on the development of a back-titration method to determine incremental LEKTI-like activity in skin samples. The method meets the analytical requirements for study sample testing, and reliable quantification can be achieved with negligible skin matrix interference. This assay does not provide analyte identity, but it can be used to measure treatment-driven increments of LEKTI-like activity within the skin epidermis.
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Affiliation(s)
- Dorival Martins
- Azitra Inc, 21 Business Park Drive, Branford, CT, 06405, USA.
| | | | - Roger Leger
- Azitra Inc, 21 Business Park Drive, Branford, CT, 06405, USA
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2
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Fukuda K, Ito Y, Furuichi Y, Matsui T, Horikawa H, Miyano T, Okada T, van Logtestijn M, Tanaka RJ, Miyawaki A, Amagai M. Three stepwise pH progressions in stratum corneum for homeostatic maintenance of the skin. Nat Commun 2024; 15:4062. [PMID: 38750035 PMCID: PMC11096370 DOI: 10.1038/s41467-024-48226-z] [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: 09/19/2023] [Accepted: 04/24/2024] [Indexed: 05/18/2024] Open
Abstract
The stratum corneum is the outermost skin layer with a vital role in skin barrier function. It is comprised of dead keratinocytes (corneocytes) and is known to maintain its thickness by shedding cells, although, the precise mechanisms that safeguard stratum corneum maturation and homeostasis remain unclear. Previous ex vivo studies have suggested a neutral-to-acidic pH gradient in the stratum corneum. Here, we use intravital pH imaging at single-corneocyte resolution to demonstrate that corneocytes actually undergo differentiation to develop three distinct zones in the stratum corneum, each with a distinct pH value. We identified a moderately acidic lower, an acidic middle, and a pH-neutral upper layer in the stratum corneum, with tight junctions playing a key role in their development. The upper pH neutral zone can adjust its pH according to the external environment and has a neutral pH under steady-state conditions owing to the influence of skin microbiota. The middle acidic pH zone provides a defensive barrier against pathogens. With mathematical modeling, we demonstrate the controlled protease activation of kallikrein-related peptidases on the stratum corneum surface that results in proper corneocyte shedding in desquamation. This work adds crucial information to our understanding of how stratum corneum homeostasis is maintained.
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Affiliation(s)
- Keitaro Fukuda
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
| | - Yoshihiro Ito
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
| | - Yuki Furuichi
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
| | - Takeshi Matsui
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
- Laboratory for Evolutionary Cell Biology of the Skin, School of Bioscience and Biotechnology, Tokyo University of Technology, Tokyo, Japan
| | - Hiroto Horikawa
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
| | - Takuya Miyano
- Department of Bioengineering, Imperial College London, London, UK
| | - Takaharu Okada
- Laboratory for Tissue Dynamics, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
- Graduate School of Medical Life Science, Yokohama City University, Kanagawa, Japan
| | | | - Reiko J Tanaka
- Department of Bioengineering, Imperial College London, London, UK
| | - Atsushi Miyawaki
- Laboratory for Cell Function Dynamics, RIKEN Center for Brain Science, Saitama, Japan
| | - Masayuki Amagai
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan.
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan.
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Montenegro SE, Oh JH, Suh JH, Mun JH, Chung JH. Higher Expression of Lympho-epithelial Kazal-type-Related Inhibitor-1 Fragments and Decreased Desquamation in the Lesional Skin of Nummular Eczema. Acta Derm Venereol 2024; 104:adv188636. [PMID: 38551375 PMCID: PMC11000662 DOI: 10.2340/actadv.v104.18636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 03/04/2024] [Indexed: 04/02/2024] Open
Abstract
Nummular eczema, a chronic dermatitis characterized by coin-shaped lesions, was first documented in 1857. However, its pathophysiological characteristics are still not well known. To investigate differences in the regulation of the desquamation process in the stratum corneum of lesional and nonlesional skin of patients with nummular eczema and healthy control subjects, tape-stripped stratum corneum samples from patients with nummular eczema and healthy volunteers were analysed using immunofluorescence staining and western blot analysis. In the nummular eczema lesional skin, expression of desmoglein-1, desmocollin-1, and corneodesmosin exhibited a disorganized, dense or partially diffuse non-peripheral pattern with increased intensity, compared with the peripheral patterns observed in healthy or nonlesional skin, suggesting the impaired desquamation process in nummular eczema. Furthermore, although the expression of the desquamation-related serine proteases, kallikrein-related peptidase 7 and 5, was increased in nummular eczema lesional skin, the immunofluorescence staining of lympho-epithelial Kazal-type-related inhibitor-1, an endogenous inhibitor of various kallikrein-related peptidases, and its fragments were significantly increased in the nummular eczema lesional skin, suggesting its contribution to the inhibition of corneodesmosomal degradation. Therefore, the increased detection of corneodesmosomal proteins in nummular eczema lesions may be due to the increased amount of the fragments of lympho-epithelial Kazal-type-related inhibitor-1, which could contribute to delayed desquamation.
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Affiliation(s)
- Sara Estefania Montenegro
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea; Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jang-Hee Oh
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea; Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Joong Heon Suh
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea; Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Je-Ho Mun
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea; Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jin Ho Chung
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea; Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea; Institute on Aging, Seoul National University, Seoul, Republic of Korea.
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4
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Miller C, Crampin E, Osborne JM. Multiscale modelling of desquamation in the interfollicular epidermis. PLoS Comput Biol 2022; 18:e1010368. [PMID: 36037236 PMCID: PMC9462764 DOI: 10.1371/journal.pcbi.1010368] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/09/2022] [Accepted: 07/08/2022] [Indexed: 11/19/2022] Open
Abstract
Maintenance of epidermal thickness is critical to the barrier function of the skin. Decreased tissue thickness, specifically in the stratum corneum (the outermost layer of the tissue), causes discomfort and inflammation, and is related to several severe diseases of the tissue. In order to maintain both stratum corneum thickness and overall tissue thickness it is necessary for the system to balance cell proliferation and cell loss. Cell proliferation in the epidermis occurs in the basal layer and causes constant upwards movement in the tissue. Cell loss occurs when dead cells at the top of the tissue are lost to the environment through a process called desquamation. Desquamation is thought to occur through a gradual reduction in adhesion between cells, due to the cleaving of adhesion proteins by enzymes, in the stratum corneum.
In this paper we will investigate combining a (mass action) subcellular model of desquamation with a three dimensional (cell centre based) multicellular model of the interfollicular epidermis to better understand maintenance of epidermal thickness. Specifically, our aim is to determine if a hypothesised biological model for the degradation of cell-cell adhesion, from the literature, is sufficient to maintain a steady state tissue thickness. These investigations show the model is able to provide a consistent rate of cell loss in the multicellular model. This loss balances proliferation, and hence maintains a homeostatic tissue thickness. Moreover, we find that multiple proliferative cell populations in the basal layer can be represented by a single proliferative cell population, simplifying investigations with this model.
The model is used to investigate a disorder (Netherton Syndrome) which disrupts desquamation. The model shows how biochemical changes can cause disruptions to the tissue, resulting in a reduced tissue thickness and consequently diminishing the protective role of the tissue. A hypothetical treatment result is also investigated: we compare the cases of a partially effective homogeneous treatment (where all cells partially recover) and a totally effective heterogeneous treatment (in which a proportion of the cells totally recover) with the aim to determine the difference in the response of the tissue to these different scenarios. Results show an increased benefit to corneum thickness from the heterogeneous treatment over the homogeneous treatment.
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Affiliation(s)
- Claire Miller
- School of Mathematics and Statistics, The University of Melbourne, Parkville, Australia
- Systems Biology Laboratory, School of Mathematics and Statistics, and Department of Biomedical Engineering, The University of Melbourne, Parkville, Australia
- Computational Science Lab, Informatics Institute, University of Amsterdam, Amsterdam, Netherlands
| | - Edmund Crampin
- Systems Biology Laboratory, School of Mathematics and Statistics, and Department of Biomedical Engineering, The University of Melbourne, Parkville, Australia
- School of Medicine, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Melbourne School of Engineering, The University of Melbourne, Parkville, Australia
| | - James M. Osborne
- School of Mathematics and Statistics, The University of Melbourne, Parkville, Australia
- * E-mail:
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SerpinB7 deficiency contributes to development of psoriasis via calcium-mediated keratinocyte differentiation dysfunction. Cell Death Dis 2022; 13:635. [PMID: 35864103 PMCID: PMC9304369 DOI: 10.1038/s41419-022-05045-8] [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: 01/16/2022] [Revised: 06/17/2022] [Accepted: 06/27/2022] [Indexed: 01/21/2023]
Abstract
Defective execution of proteases and protease inhibitors that mediate abnormal signaling cascades is emerging as a key contributor to skin diseases, such as psoriasis. SerpinB7 is identified as a skin-specific endogenous protease inhibitor, but the role and underlying mechanism in psoriasis are poorly understood. Here we found that SerpinB7 is highly expressed in psoriatic keratinocytes of patients and imiquimod-induced psoriatic lesions in mice. SerpinB7-/- mice showed abnormal epidermal barrier integrity and skin architecture in homeostasis, and aggravated psoriatic lesion with inhibiting terminal differentiation and increasing inflammatory cells infiltration compared to SerpinB7+/+ mice after Imiquimod treatment. Mechanistically, SerpinB7 deficiency results in excessive proliferation and impaired differentiation, as well as increased chemokines and antimicrobial peptide expression in normal human epidermal keratinocyte and mouse primary keratinocyte. Transcriptomics and proteomics results showed that the SeprinB7 deficiency affected keratinocyte differentiation and proinflammatory cytokines, possibly by affecting the calcium ion channel-related proteins. Notably, we demonstrated that SerpinB7 deficiency prevented the increase in intracellular Ca2+ influx, which was partly eliminated by the intracellular Ca2+ chelator BAPTA-AM. Our findings first described the critical role of SerpinB7 in the regulation of keratinocyte differentiation and psoriatic microenvironment mediated via keratinocytes' intracellular calcium flux, proposing a new candidate for therapeutic targets in psoriasis.
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Nouwen AEM, Schappin R, Nguyen NT, Ragamin A, Bygum A, Bodemer C, Dalm VASH, Pasmans SGMA. Outcomes of Systemic Treatment in Children and Adults With Netherton Syndrome: A Systematic Review. Front Immunol 2022; 13:864449. [PMID: 35464459 PMCID: PMC9022473 DOI: 10.3389/fimmu.2022.864449] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/07/2022] [Indexed: 01/24/2023] Open
Abstract
Background Comèl-Netherton syndrome (NS) is a rare disease caused by pathogenic variants in the SPINK5 gene, leading to severe skin barrier impairment and proinflammatory upregulation. Given the severity of the disease, treatment of NS is challenging. Current treatment regimens are mainly topical and supportive. Although novel systemic treatment options for NS have been suggested in recent literature, little is known about their outcomes. Objective to provide an overview of systemic treatment options and their outcomes in adults and children with NS. Methods Embase, MEDLINE, Web of Science, Cochrane Central Register of Controlled Trials, and Google Scholar were searched up to July 22, 2021. Empirical studies published in English language mentioning systemic treatment in NS were enrolled. Studies that did not define a treatment period or report at least one outcome were excluded. Methodological quality was evaluated by the Joanna Briggs Institute critical appraisal checklist for case reports or case series. Overall quality of evidence of the primary outcome, skin, was assessed by the GRADE approach. Results 36 case series and case reports were included. The effects of 15 systemic therapies were described in 48 patients, of which 27 were children. Therapies included retinoids, prednisolone, cyclosporine, immunoglobulins, and biologicals. In retinoids both worsening (4/15 cases) and improvement (6/15 cases) of the skin was observed. Use of prednisolone and cyclosporine was only reported in one patient. Immunoglobulins (13/15 cases) and biologicals (18/21 cases) showed improvement of the skin. Certainty of evidence was rated as very low. Conclusion NS is a rare disease, which is reflected in the scarce literature on systemic treatment outcomes in children and adults with NS. Studies showed large heterogeneity in outcome measures. Adverse events were scarcely reported. Long-term outcomes were reported in a minority of cases. Nonetheless, a general beneficial effect of systemic treatment was found. Immunoglobulins and biologicals showed the most promising results and should be further explored. Future research should focus on determining a core outcome set and measurement instruments for NS to improve quality of research. Systematic Review Registration https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=217933, PROSPERO (ID: 217933).
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Affiliation(s)
- Anouk E M Nouwen
- Department of Dermatology-Center of Pediatric Dermatology, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, Netherlands
| | - Renske Schappin
- Department of Dermatology-Center of Pediatric Dermatology, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, Netherlands
| | - N Tan Nguyen
- Department of Dermatology-Center of Pediatric Dermatology, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, Netherlands
| | - Aviël Ragamin
- Department of Dermatology-Center of Pediatric Dermatology, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, Netherlands
| | - Anette Bygum
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark.,Clinical Institute, University of Southern Denmark, Odense, Denmark
| | - Christine Bodemer
- Department of Dermatology, Reference Centre for Genodermatoses and Rare Skin Diseases (MAGEC), Necker-Enfants Malades Hospital (AP-HP), Paris Centre University, Paris, France
| | - Virgil A S H Dalm
- Department of Immunology, Erasmus University Medical Center, Rotterdam, Netherlands.,Department of Internal Medicine, Division of Allergy & Clinical Immunology, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Suzanne G M A Pasmans
- Department of Dermatology-Center of Pediatric Dermatology, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, Netherlands
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7
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Barbieux C, Bonnet des Claustres M, Fahrner M, Petrova E, Tsoi LC, Gouin O, Leturcq F, Nicaise-Roland P, Bole C, Béziat V, Bourrat E, Schilling O, Gudjonsson JE, Hovnanian A. Netherton syndrome subtypes share IL-17/IL-36 signature with distinct IFN-α and allergic responses. J Allergy Clin Immunol 2022; 149:1358-1372. [PMID: 34543653 DOI: 10.1016/j.jaci.2021.08.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 08/12/2021] [Accepted: 08/27/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND Netherton syndrome (NS) is a rare recessive skin disorder caused by loss-of-function mutations in SPINK5 encoding the protease inhibitor LEKTI (lymphoepithelial Kazal-type-related inhibitor). NS patients experience severe skin barrier defects, display inflammatory skin lesions, and have superficial scaling with atopic manifestations. They present with typical ichthyosis linearis circumflexa (NS-ILC) or scaly erythroderma (NS-SE). OBJECTIVE We used a combination of several molecular profiling methods to comprehensively characterize the skin, immune cells, and allergic phenotypes of NS-ILC and NS-SE patients. METHODS We studied a cohort of 13 patients comprising 9 NS-ILC and 4 NS-SE. RESULTS Integrated multiomics revealed abnormal epidermal proliferation and differentiation and IL-17/IL-36 signatures in lesion skin and in blood in both NS endotypes. Although the molecular profiles of NS-ILC and NS-SE lesion skin were very similar, nonlesion skin of each disease subtype displayed distinctive molecular features. Nonlesion and lesion NS-SE epidermis showed activation of the type I IFN signaling pathway, while lesion NS-ILC skin differed from nonlesion NS-ILC skin by increased complement activation and neutrophil infiltration. Serum cytokine profiling and immunophenotyping of circulating lymphocytes showed a TH2-driven allergic response in NS-ILC, whereas NS-SE patients displayed mainly a TH9 axis with increased CCL22/MDC and CCL17/TARC serum levels. CONCLUSIONS This study confirms IL-17/IL-36 as the predominant signaling axes in both NS endotypes and unveils molecular features distinguishing NS-ILC and NS-SE. These results identify new therapeutic targets and could pave the way for precision medicine of NS.
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Affiliation(s)
- Claire Barbieux
- INSERM UMR 1163, Laboratory of Genetic Skin Diseases, Imagine Institute, Paris, France
| | | | - Matthias Fahrner
- Institute for Surgical Pathology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Spemann Graduate School of Biology and Medicine (SGBM), Albert-Ludwigs-University Freiburg, Freiburg, Germany; Faculty of Biology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Evgeniya Petrova
- INSERM UMR 1163, Laboratory of Genetic Skin Diseases, Imagine Institute, Paris, France
| | - Lam C Tsoi
- INSERM UMR 1163, Laboratory of Genetic Skin Diseases, Imagine Institute, Paris, France
| | - Olivier Gouin
- INSERM UMR 1163, Laboratory of Genetic Skin Diseases, Imagine Institute, Paris, France
| | - Florent Leturcq
- INSERM UMR 1163, Laboratory of Genetic Skin Diseases, Imagine Institute, Paris, France
| | - Pascale Nicaise-Roland
- Department of Immunology, Bichat Hospital, AP-HP-Nord, Paris, France; INSERM UMR 1152, Paris, France
| | | | - Vivien Béziat
- INSERM UMR 1163, Laboratory of Human Genetics of Infectious Diseases, Imagine Institute, Paris, France
| | | | - Oliver Schilling
- Institute for Surgical Pathology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | | | - Alain Hovnanian
- University of Paris, Paris, France; Department of Genetics, Necker Hospital for Sick Children (AP-HP), Paris, France; Department of Dermatology, University of Michigan, Ann Arbor, Mich.
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8
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Liddle J, Beneton V, Benson M, Bingham R, Bouillot A, Boullay AB, Brook E, Cryan J, Denis A, Edgar E, Ferrie A, Fouchet MH, Grillot D, Holmes DS, Howes A, Krysa G, Laroze A, Lennon M, McClure F, Moquette A, Nicodeme E, Santiago B, Santos L, Smith KJ, Thorpe JH, Thripp G, Trottet L, Walker AL, Ward SA, Wang Y, Wilson S, Pearce AC, Hovnanian A. A Potent and Selective Kallikrein-5 Inhibitor Delivers High Pharmacological Activity in Skin from Patients with Netherton Syndrome. J Invest Dermatol 2021; 141:2272-2279. [PMID: 33744298 DOI: 10.1016/j.jid.2021.01.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/10/2020] [Accepted: 01/06/2021] [Indexed: 12/01/2022]
Abstract
Regulation of proteolytic activity in the skin plays a pivotal role in epidermal homeostasis. This is best exemplified in Netherton syndrome, a severe genetic skin condition caused by loss-of-function mutations in the gene serine protease inhibitor Kazal-type 5 encoding lympho-epithelial Kazal-type-related inhibitor, a serine protease inhibitor that regulates kallikrein (KLK)-related peptidase 5, 7, and 14 activities. KLK5 plays a central role in stratum corneum shedding and inflammatory cell signaling, activates KLK7 and KLK14, and is therefore an optimal therapeutic target. We aimed to identify a potent and selective small-molecule inhibitor of KLK5 amenable to epidermal delivery. GSK951 was identified using a structure-based design strategy and showed a half maximal inhibitory concentration of 250 pM for KLK5 and greater than 100-fold selectivity over KLK7 and KLK14. Cocrystal structure analysis identified the critical catalytic site interactions to a surrogate for KLK5. Topical application of GSK951-containing cream inhibited KLK5 activity in TgKLK5 mouse skin, reduced transepidermal water loss, and decreased proinflammatory cytokine expression. GSK951 achieved high concentrations in healthy human epidermis following topical application in a cream formulation. Finally, KLK5 protease activity was increased in stratum corneum of patients with Netherton syndrome and significantly inhibited by GSK951. These findings unveil a KLK5-specific small-molecule inhibitor with a high therapeutic potential for patients with Netherton syndrome.
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Affiliation(s)
- John Liddle
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | | | - Matthew Benson
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Ryan Bingham
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | | | | | - Eloisa Brook
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Jenni Cryan
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | | | - Emma Edgar
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Alan Ferrie
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | | | | | - Duncan S Holmes
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Ashleigh Howes
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | | | | | - Mark Lennon
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Fiona McClure
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | | | | | - Brandon Santiago
- Discovery and Preclinical Development, GSK Dermatology Unit, Collegeville, Pennsylvania, USA
| | - Leandro Santos
- Discovery and Preclinical Development, GSK Dermatology Unit, Collegeville, Pennsylvania, USA
| | - Kathrine J Smith
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - James H Thorpe
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Gary Thripp
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | | | - Ann L Walker
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Simon A Ward
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Yichen Wang
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1163, Laboratory of Genetic Skin Diseases, Imagine Institute, Paris, France
| | - Steve Wilson
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Andrew C Pearce
- Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, United Kingdom
| | - Alain Hovnanian
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1163, Laboratory of Genetic Skin Diseases, Imagine Institute, Paris, France; University of Paris, Paris, France; Department of Genetics, Necker hospital for sick children, Assistance Publique-Hôpitaux de Paris, Paris, France.
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9
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Petrova E, Hovnanian A. Advances in understanding of Netherton syndrome and therapeutic implications. Expert Opin Orphan Drugs 2020. [DOI: 10.1080/21678707.2020.1857724] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Evgeniya Petrova
- Laboratory of genetic skin diseases, Université de Paris, Imagine Institute, INSERM UMR1163, Paris, France
| | - Alain Hovnanian
- Laboratory of genetic skin diseases, Université de Paris, Imagine Institute, INSERM UMR1163, Paris, France
- Departement of Genetics, AP-HP, Hôpital Necker-Enfants Malades, Paris, France
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10
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Dabas G, Mahajan R, De D, Handa S, Kumar R, Dayal D, Suthar R, Panigrahi I. Managing syndromic congenital ichthyosis at a tertiary care institute-Genotype-phenotype correlations, and novel treatments. Dermatol Ther 2020; 33:e13816. [PMID: 32533806 DOI: 10.1111/dth.13816] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 06/01/2020] [Accepted: 06/09/2020] [Indexed: 12/31/2022]
Abstract
Syndromic congenital ichthyoses (CI) are genetically determined disorders of cornification that are characterized by generalized scaling along with systemic symptoms. Data on congenital syndromic ichthyosis from developing countries are scarce. We aimed to assess the prevalence, phenotype-genotype correlation, and management of syndromic CI patients presenting to our outpatient during the specified period this was a retrospective study of congenital syndromic ichthyosis patients attending a dermatology clinic in a tertiary care center from 2105-2018. We reviewed epidemiological and comorbidities data, phenotype-genotype correlations, and treatments of syndromic congenital ichthyosis patients. Six patients of Syndromic CI were diagnosedamongst 86 patients of CI (8.1%). Amongst these, three patients of Sjogren-Larrson syndrome (SLS), two patients of Netherton syndrome (NS), and one of Chanarin-Dorfman disease (CDD) were reported. Next-generation sequencing (NGS) was performed with novel variants reported in one patient each of SLS, NS, and CDD. An atypical phenotype was observed in a patient with NS with associated growth hormone and adrenocorticotropic hormone deficiency but with favorable clinical response to intravenous immunoglobulin. Our reports point towards the unreported pool of genetic mutations in CI from India. Novel mutations were associated with variable cutaneous and systemic involvement.
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Affiliation(s)
- Garima Dabas
- Department of Dermatology, Venereology, and Leprology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Rahul Mahajan
- Department of Dermatology, Venereology, and Leprology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Dipankar De
- Department of Dermatology, Venereology, and Leprology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Sanjeev Handa
- Department of Dermatology, Venereology, and Leprology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Rakesh Kumar
- Department of Paediatric Endocrinology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Devi Dayal
- Department of Paediatric Endocrinology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Renu Suthar
- Department of Paediatric Neurology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Inusha Panigrahi
- Department of Paediatric Genetics, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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11
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Stuvel K, Heeringa JJ, Dalm VASH, Meijers RWJ, Hoffen E, Gerritsen SAM, Zelm MC, Pasmans SGMA. Comel-Netherton syndrome: A local skin barrier defect in the absence of an underlying systemic immunodeficiency. Allergy 2020; 75:1710-1720. [PMID: 31975472 PMCID: PMC7384150 DOI: 10.1111/all.14197] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 10/14/2019] [Accepted: 11/14/2019] [Indexed: 12/13/2022]
Abstract
Background Comel‐Netherton syndrome (NS) is a rare autosomal disease, characterized by severe skin disease, hair shaft defects, atopic diathesis, and increased susceptibility for skin infections. Since patients with NS suffer from recurrent infections, it has been hypothesized that an underlying immunodeficiency attributes to this. Here, we studied clinical and immunological characteristics of the cohort of NS patients in the Netherlands in order to identify whether potential immunodeficiencies result in the increased risk of infectious complications. Methods Phenotypes were scored for severity of skin condition, specific hair shaft defects, atopy, and recurrent infections. Patients’ blood samples were collected for quantification of serum immunoglobulin (Ig) levels, specific antibodies against Streptococcuspneumoniae, and allergen‐specific IgE, as well as detailed immunophenotyping of blood leukocyte and lymphocyte subsets by flow cytometry. Results A total of 14 patients were included with age range 3‐46 years and varying degrees of skin involvement. All patients presented with atopic symptoms (food allergy, n = 13; hay fever, n = 10; asthma, n = 7). Recurrent skin infections were common, particularly in childhood (n = 12). Low levels of specific antibodies against S pneumoniae were found in 10 of 11 evaluated patients. Detailed immunological analysis was performed on 9 adult patients. Absolute numbers of lymphocyte subsets and serum immunoglobulin levels were all within normal ranges. Conclusion Multidisciplinary evaluation of our national cohort showed no evidence for a severe, clinically relevant systemic immunodeficiency. Therefore, we conclude that in Dutch NS patients the increased risk of infections most likely results from the skin barrier disruption and that increased allergen penetration predisposes to allergic sensitization.
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Affiliation(s)
- Kira Stuvel
- Department of Dermatology Erasmus MC University Medical Center Rotterdam The Netherlands
| | - Jorn J. Heeringa
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands
| | - Virgil A. S. H. Dalm
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands
- Department of Internal Medicine Division of Clinical Immunology Erasmus MC University Medical Center Rotterdam The Netherlands
- Academic Center for Rare Immunological Diseases (RIDC) Erasmus MC University Medical Center Rotterdam The Netherlands
| | - Ruud W. J. Meijers
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands
| | - Els Hoffen
- Department of Dermatology and Allergology University Medical Center Utrecht The Netherlands
| | | | - Menno C. Zelm
- Department of Immunology and Pathology Central Clinical School Monash University Melbourne Vic. Australia
- Department of Allergy, Immunology & Respiratory Medicine Alfred Hospital Melbourne Vic. Australia
| | - Suzanne G. M. A. Pasmans
- Department of Dermatology Erasmus MC University Medical Center Rotterdam The Netherlands
- Department of Pediatric Dermatology Sophia Children’s Hospital Erasmus MC University Medical Center Rotterdam The Netherlands
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12
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Di Paolo CT, Diamandis EP, Prassas I. The role of kallikreins in inflammatory skin disorders and their potential as therapeutic targets. Crit Rev Clin Lab Sci 2020; 58:1-16. [PMID: 32568598 DOI: 10.1080/10408363.2020.1775171] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The skin is a vital organ of the human body, serving numerous protective and functional roles that are essential for survival. Residing in the epidermis are various epidermal proteases responsible for the establishment and regulation of barrier function. The human tissue kallikrein-related peptidase family conserves homeostasis of the skin barrier through their roles in desquamation, antimicrobial defense, innate immune response, and barrier maintenance. The activity of kallikreins is tightly regulated and dysregulation of kallikrein activity is seen to contribute to the formation of several inflammatory skin disorders. This review highlights the roles of kallikreins in skin homeostasis and pathologies. Due to their part in these skin disorders, inhibitors of the skin kallikreins have become attractive therapeutics. Over the past few years, both natural and synthetic inhibitors of several kallikreins have been identified and are undergoing further development as treatments to restore compromised barrier function. This review summarizes the kallikrein inhibitors under development for this purpose. These inhibitors remain promising therapeutics in cases of severe skin inflammation not well managed by current therapies.
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Affiliation(s)
- Caitlin T Di Paolo
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada.,Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Canada
| | - Eleftherios P Diamandis
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada.,Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Canada.,Department of Clinical Biochemistry, University Health Network, Toronto, Canada
| | - Ioannis Prassas
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Canada
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13
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Di WL, Lwin SM, Petrova A, Bernadis C, Syed F, Farzaneh F, Moulding D, Martinez AE, Sebire NJ, Rampling D, Virasami A, Zamiri M, Wang W, Hara H, Kadiyirire T, Abdul-Wahab A, Martinez-Queipo M, Harper JI, McGrath JA, Thrasher AJ, Mellerio JE, Qasim W. Generation and Clinical Application of Gene-Modified Autologous Epidermal Sheets in Netherton Syndrome: Lessons Learned from a Phase 1 Trial. Hum Gene Ther 2019; 30:1067-1078. [PMID: 31288584 DOI: 10.1089/hum.2019.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Netherton syndrome (NS) is a rare autosomal recessive skin disorder caused by mutations in SPINK5. It is a debilitating condition with notable mortality in the early years of life. There is no curative treatment. We undertook a nonrandomized, open-label, feasibility, and safety study using autologous keratinocytes transduced with a lentiviral vector encoding SPINK5 under the control of the human involucrin promoter. Six NS subjects were recruited, and gene-modified epithelial sheets were successfully generated in three of five subjects. The sheets exhibited expression of correctly sized lympho-epithelial Kazal-type-related inhibitor (LEKTI) protein after modification. One subject was grafted with a 20 cm2 gene-modified graft on the left anterior thigh without any adverse complications and was monitored by serial sampling for 12 months. Recovery within the graft area was compared against an area outside by morphology, proviral copy number and expression of the SPINK5 encoded protein, LEKTI, and its downstream target kallikrein 5, which exhibited transient functional correction. The study confirmed the feasibility of generating lentiviral gene-modified epidermal sheets for inherited skin diseases such as NS, but sustained LEKTI expression is likely to require the identification, targeting, and engraftment of long-lived keratinocyte stem cell populations for durable therapeutic effects. Important learning points for the application of gene-modified epidermal sheets are discussed.
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Affiliation(s)
- Wei-Li Di
- Infection, Immunity and Inflammation Programme, UCL GOS Institute of Child Health, London, United Kingdom
| | - Su M Lwin
- St. John's Institute of Dermatology, King's College London, Guy's Hospital, London, United Kingdom
| | - Anastasia Petrova
- Infection, Immunity and Inflammation Programme, UCL GOS Institute of Child Health, London, United Kingdom
| | - Catina Bernadis
- Plastic Surgery Unit, Guy's and St. Thomas' NHS Foundation Trust, London, United Kingdom
| | - Farhatullah Syed
- Infection, Immunity and Inflammation Programme, UCL GOS Institute of Child Health, London, United Kingdom
| | - Farzin Farzaneh
- Cell and Gene Therapy-King's (CGT-K), School of Cancer and Pharmaceutical Sciences, King's College London, London, United Kingdom
| | - Dale Moulding
- Light Microscopy Core Facility, UCL GOS Institute of Child Health, London, United Kingdom
| | - Anna E Martinez
- Dermatology Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Neil J Sebire
- Histopathology Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Dyanne Rampling
- Histopathology Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Alex Virasami
- Histopathology Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Mozheh Zamiri
- School of Life Sciences, University of Dundee, Scotland, United Kingdom
| | - Wei Wang
- Department of Translational Oncology, German Cancer Research Center, National Center for Tumor Diseases, Heidelberg, Heidelberg, Germany.,GeneWerk GmbH, Heidelberg, Germany
| | - Havinder Hara
- Infection, Immunity and Inflammation Programme, UCL GOS Institute of Child Health, London, United Kingdom
| | - Tendai Kadiyirire
- St. John's Institute of Dermatology, King's College London, Guy's Hospital, London, United Kingdom
| | - Alya Abdul-Wahab
- St. John's Institute of Dermatology, King's College London, Guy's Hospital, London, United Kingdom
| | | | - John I Harper
- Infection, Immunity and Inflammation Programme, UCL GOS Institute of Child Health, London, United Kingdom
| | - John A McGrath
- St. John's Institute of Dermatology, King's College London, Guy's Hospital, London, United Kingdom
| | - Adrian J Thrasher
- Infection, Immunity and Inflammation Programme, UCL GOS Institute of Child Health, London, United Kingdom
| | - Jemima E Mellerio
- St. John's Institute of Dermatology, King's College London, Guy's Hospital, London, United Kingdom
| | - Waseem Qasim
- Infection, Immunity and Inflammation Programme, UCL GOS Institute of Child Health, London, United Kingdom
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14
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Wiegmann H, Valentin F, Tarinski T, Liebau E, Loser K, Traupe H, Oji V. LEKTI domains D6, D7 and D8+9 serve as substrates for transglutaminase 1: implications for targeted therapy of Netherton syndrome. Br J Dermatol 2019; 181:999-1008. [PMID: 30801672 DOI: 10.1111/bjd.17820] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND Transglutaminase (TG)1 plays a key role in the formation of the cornified envelope and thus in the maintenance of the epidermal barrier. Patients with Netherton syndrome (LEKTI deficiency) have increased activity of both TG1 and serin proteases. OBJECTIVES To determine whether there is a functional biochemical link between TG1 and LEKTI and whether LEKTI domains could possibly serve as substrates for TG1. METHODS We analysed the protein sequence of LEKTI for possible TG1 recognition sites using bioinformatics. Synthetic peptides and recombinant LEKTI domains D6, D7 and D8+9 were examined in vitro and in situ for possible substrate specificity. The recombinant LEKTI domains were studied for inhibitory activity in a kallikrein (KLK)5 activity test. RESULTS We identified possible TG1 consensus sequences in LEKTI domains D6, D7 and D8+9, pointing to a novel biological link between these two proteins. Indeed, synthesized short peptides from these consensus sequences were incorporated into the TG1 activity zone of the epidermis. In vitro the entire recombinant domains of LEKTI showed substrate specificity for TG1, which was again confirmed in situ. The inhibitory activity of the recombinant LEKTI domains was confirmed by a KLK5 inhibition test. The strongest inhibition was observed for domains D8+9. CONCLUSIONS There are specific domains of LEKTI that are recognized and processed by TG1. LEKTI domains D6, D7 and D8+9 contribute to the formation and protection of the cornified envelope. These results impact the development of protein replacement therapy approaches for Netherton syndrome. What's already known about this topic? LEKTI and transglutaminase (TG)1 are key proteins involved in the terminal differentiation of the epidermis. Lack of LEKTI causes Netherton syndrome; TG1 deficiency causes lamellar ichthyosis. The serine protease inhibitor LEKTI is processed into different functional units. Among different target proteases, kallikrein (KLK)5 appears to be a key player in disease pathology. It has been demonstrated that LEKTI domain 6 inhibits KLK5 and KLK7; LEKTI domains 8-11 also inhibit KLK14. What does this study add? The single LEKTI domains 6, 7 and the functional unit of domains 8 and 9 contain recognition motifs for TG1. We show that these domains and unit are crosslinked into the epidermis by TG1. Functional analyses of the recombinant LEKTI domains revealed that LEKTI D8+9 has the strongest inhibitory effect on KLK5. What is the translational message? The novel functional link between LEKTI and TG1 should be taken into account when considering the development of a targeted topical protein therapy for Netherton syndrome. The unit of domains D8+9 may be sufficient for this purpose.
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Affiliation(s)
- H Wiegmann
- Department of Dermatology, University Hospital Muenster, Von-Esmarch-Straße 58, 48149, Muenster, Germany
| | - F Valentin
- Department of Dermatology, University Hospital Muenster, Von-Esmarch-Straße 58, 48149, Muenster, Germany
| | - T Tarinski
- Department of Dermatology, University Hospital Muenster, Von-Esmarch-Straße 58, 48149, Muenster, Germany
| | - E Liebau
- Institute of Zoophysiology, University of Muenster, Schlossplatz 8, 48143, Muenster, Germany
| | - K Loser
- Department of Dermatology, University Hospital Muenster, Von-Esmarch-Straße 58, 48149, Muenster, Germany
| | - H Traupe
- Department of Dermatology, University Hospital Muenster, Von-Esmarch-Straße 58, 48149, Muenster, Germany
| | - V Oji
- Department of Dermatology, University Hospital Muenster, Von-Esmarch-Straße 58, 48149, Muenster, Germany
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15
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Potent, multi-target serine protease inhibition achieved by a simplified β-sheet motif. PLoS One 2019; 14:e0210842. [PMID: 30668585 PMCID: PMC6342301 DOI: 10.1371/journal.pone.0210842] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 01/02/2019] [Indexed: 11/19/2022] Open
Abstract
Engagement of an extended β-sheet is a common substrate/inhibitor interaction at the active site of serine proteases and is an important feature of Laskowski mechanism inhibitors that present a substrate-like loop to a target protease. This loop is cleaved but subsequently relegated forming a stable inhibitor/protease complex. Laskowski inhibitors are ubiquitous in nature and are used extensively in serine protease inhibitor design. However, most studies concentrate on introducing new sidechain interactions rather than the direct contributions of the substrate-like β-sheet to enzyme inhibition. Here we report the crystal structure of an simplified β-sheet inhibitory motif within the Sunflower Trypsin Inhibitor (SFTI) in complex with trypsin. We show that the intramolecular hydrogen bond network of this SFTI variant (SFTI-TCTR) engages the inhibitor sidechains that would normally interact with a target protease, giving mainchain interactions a more prominent role in complex formation. Despite having reduced sidechain interactions, this SFTI variant is remarkably potent and inhibits a diverse range of serine proteases. Crystal structural analysis and molecular modelling of SFTI-TCTR complexes again indicates an interface dominated by β–sheet interactions, highlighting the importance of this motif and the adaptability of SFTI as a scaffold for inhibitor design.
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16
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Auerbach M, Brown L, Whitfill T, Baird J, Abulebda K, Bhatnagar A, Lutfi R, Gawel M, Walsh B, Tay KY, Lavoie M, Nadkarni V, Dudas R, Kessler D, Katznelson J, Ganghadaran S, Hamilton MF. Adherence to Pediatric Cardiac Arrest Guidelines Across a Spectrum of Fifty Emergency Departments: A Prospective, In Situ, Simulation-based Study. Acad Emerg Med 2018; 25:1396-1408. [PMID: 30194902 DOI: 10.1111/acem.13564] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/09/2018] [Accepted: 08/27/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVES Pediatric out-of-hospital cardiac arrest survival outcomes are dismal (<10%). Care that is provided in adherence to established guidelines has been associated with improved survival. Lower mortality rates have been reported in higher-volume hospitals, teaching hospitals, and trauma centers. The primary objective of this article was to explore the relationship of hospital characteristics, such as annual pediatric patient volume, to adherence to pediatric cardiac arrest guidelines during an in situ simulation. Secondary objectives included comparing adherence to other team, provider, and system factors. METHODS This prospective, multicenter, observational study evaluated interprofessional teams in their native emergency department (ED) resuscitation bays caring for a simulated 5-year-old child presenting in cardiac arrest. The primary outcome, adherence to the American Heart Association pediatric guidelines, was assessed using a 14-item tool including three component domains: basic life support (BLS), pulseless electrical activity (PEA), and ventricular fibrillation (VF). Provider, team, and hospital-level data were collected as independent data. EDs were evaluated in four pediatric volume groups (low < 1,800/year; medium 1,800-4,999; medium-high 5,000-9,999; high > 10,000). Cardiac arrest adherence and domains were evaluated by pediatric patient volume and other team and hospital-level characteristics, and path analyses were performed to evaluate the contribution of patient volume, systems readiness, and teamwork on BLS, PEA, and VF adherence. RESULTS A total of 101 teams from a spectrum of 50 EDs participated including nine low pediatric volume (<1,800/year), 36 medium volume (1,800-4,999/year), 24 medium-high (5,000-9,999/year), and 32 high volume (≥10000/year). The median total adherence score was 57.1 (interquartile range = 50.0-78.6). This was not significantly different across the four volume groups. The highest level of adherence for BLS and PEA domains was noted in the medium-high-volume sites, while no difference was noted for the VF domain. The lowest level of BLS adherence was noted in the lowest-volume EDs. Improved adherence was not directly associated with higher pediatric readiness survey (PRS) score provider experience, simulation teamwork performance, or more providers with Pediatric Advanced Life Support (PALS) training. EDs in teaching hospitals with a trauma center designation that served only children demonstrated higher adherence compared to nonteaching hospitals (64.3 vs 57.1), nontrauma centers (64.3 vs. 57.1), and mixed pediatric and adult departments (67.9 vs. 57.1), respectively. The overall effect sizes for total cardiac adherence score are ED type γ = 0.47 and pediatric volume (low and medium vs. medium-high and high) γ = 0.41. A series of path analyses models was conducted that indicated that overall pediatric ED volume predicted significantly better guideline adherence, but the effect of volume on performance was only mediated by the PRS for the VF domain. CONCLUSIONS This study demonstrated variable adherence to pediatric cardiac arrest guidelines across a spectrum of EDs. Overall adherence was not associated with ED pediatric volume. Medium-high-volume EDs demonstrated the highest levels of adherence for BLS and PEA. Lower-volume EDs were noted to have lower adherence to BLS guidelines. Improved adherence was not directly associated with higher PRS score provider experience, simulation teamwork performance, or more providers with PALS training. This study demonstrates that current approaches optimizing the care of children in cardiac arrest in the ED (provider training, teamwork training, environmental preparation) are insufficient.
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Affiliation(s)
- Marc Auerbach
- Department of Pediatrics and Emergency Medicine, Yale University School of Medicine, New Haven, CT
| | - Linda Brown
- Department of Emergency Medicine, Alpert School of Medicine at Brown University, Providence, RI
| | - Travis Whitfill
- Department of Pediatrics and Emergency Medicine, Yale University School of Medicine, New Haven, CT
| | - Janette Baird
- Department of Emergency Medicine, Alpert School of Medicine at Brown University, Providence, RI
| | - Kamal Abulebda
- Department of Pediatrics, Division of Critical Care, Indiana University School of Medicine, Riley Hospital for Children at Indiana University Health, Indianapolis, IN
| | - Ambika Bhatnagar
- Department of Pediatrics and Emergency Medicine, Yale University School of Medicine, New Haven, CT
| | - Riad Lutfi
- Department of Pediatrics, Division of Critical Care, Indiana University School of Medicine, Riley Hospital for Children at Indiana University Health, Indianapolis, IN
| | - Marcie Gawel
- Department of Pediatrics and Emergency Medicine, Yale University School of Medicine, New Haven, CT
| | - Barbara Walsh
- Department of Pediatrics, Division of Pediatric Emergency Medicine, Boston University, Boston, MA
| | - Khoon-Yen Tay
- Department of Pediatrics, Division of Pediatric Emergency Medicine, University of Pennsylvania Perelman School of Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA
| | - Megan Lavoie
- Department of Pediatrics, Division of Pediatric Emergency Medicine, University of Pennsylvania Perelman School of Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA
| | - Vinay Nadkarni
- Department of Anesthesiology and Critical Care Medicine, University of Pennsylvania Perelman School of Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA
| | - Robert Dudas
- Department of Pediatrics, Division of General Pediatrics and Adolescent Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - David Kessler
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY
| | - Jessica Katznelson
- Department of Pediatrics, Division of Pediatric Emergency Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Sandeep Ganghadaran
- Department of Critical Care Medicine and Pediatrics, Children's Hospital at Montefiore, Bronx, NY
| | - Melinda Fiedor Hamilton
- Department of Critical Care Medicine and Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA
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17
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Sugimoto S, Morizane S, Nomura H, Kobashi M, Sugihara S, Iwatsuki K. Toll-like receptor signaling induces the expression of lympho-epithelial Kazal-type inhibitor in epidermal keratinocytes. J Dermatol Sci 2018; 92:181-187. [PMID: 30270115 DOI: 10.1016/j.jdermsci.2018.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 08/15/2018] [Accepted: 09/04/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Lympho-epithelial Kazal-type inhibitor (LEKTI) tightly controls the activities of serine proteases such as kallikrein-related peptidase (KLK) 5 and KLK7 in the epidermis. LEKTI is known to be an essential molecule for the epidermal skin barrier, as demonstrated by SPINK5 nonsense mutation, which results in Netherton syndrome. Toll-like receptors (TLRs) recognize pathogen-associated molecular patterns or damage-associated molecular patterns and produce inflammatory cytokines, chemokines, and antimicrobial peptides. However, the effect of TLR signaling on the expression of LEKTI is not clear. OBJECTIVE To investigate whether TLR signaling can affect expression of LEKTI in epidermal keratinocytes. METHODS We stimulated a panel of TLR ligands and investigated the expression of LEKTI in normal human epidermal keratinocytes (NHEKs). We further measured trypsin or chymotrypsin-like serine protease activity in NHEK cultured media under stimulation with TLR3 ligand, poly (I:C). Immunostaining for LEKTI was performed using skin samples from skin infectious diseases. RESULTS TLR1/2, 3, 5, and 2/6 ligands induced the expression of LEKTI in NHEKs. The trypsin or chymotrypsin-like serine protease activity in NHEKs was up-regulated with the stimulation of poly (I:C). The gene expressions of KLK6, KLK10, KLK11, and KLK13 were also increased by poly (I:C). An immunohistochemical analysis demonstrated that the expression of LEKTI was up-regulated in the lesions of varicella, pyoderma, and rosacea. CONCLUSIONS TLR signaling induces the expression of LEKTI in epidermal keratinocytes, which might contribute to the control of aberrant serine protease activities in inflammatory skin diseases.
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Affiliation(s)
- Saeko Sugimoto
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Science, Okayama, Japan
| | - Shin Morizane
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Science, Okayama, Japan.
| | - Hayato Nomura
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Science, Okayama, Japan
| | - Mina Kobashi
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Science, Okayama, Japan
| | - Satoru Sugihara
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Science, Okayama, Japan
| | - Keiji Iwatsuki
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Science, Okayama, Japan
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18
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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.
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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.
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Soualmia F, El Amri C. Serine protease inhibitors to treat inflammation: a patent review (2011-2016). Expert Opin Ther Pat 2017; 28:93-110. [PMID: 29171765 DOI: 10.1080/13543776.2018.1406478] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Inflammation is a physiological part of the complex biological response of tissues to counteract various harmful signals. This process involves diverse actors such as immune cells, blood vessels, and nerves as sources of mediators for inflammation control. Among them serine proteases are key elements in both physiological and pathological inflammation. AREAS COVERED Serine protease inhibitors to treat inflammatory diseases are being actively investigated by various industrial and academic institutions. The present review covers patent literature on serine protease inhibitors for the therapy of inflammatory diseases patented between 2011 and 2016. EXPERT OPINION Serine proteases regulating inflammation are versatile enzymes, usually involved in proinflammatory cytokine production and activation of immune cells. Their dysregulation during inflammation can have devastating consequences, promoting various diseases including skin and lung inflammation, neuroinflammation, and inflammatory arthritis. Several serine proteases were selected for their contribution to inflammatory diseases and significant efforts that are spread to develop inhibitors. Strategies developed for inhibitor identification consist on either peptide-based inhibitor derived from endogenous protein inhibitors or small-organic molecules. It is also worth noting that among the recent patents on serine protease inhibitors related to inflammation a significant number are related to retinal vascular dysfunction and skin diseases.
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Affiliation(s)
- Feryel Soualmia
- a B2A, Biological Adaptation and Ageing, Integrated Cellular Ageing and Inflammation, Molecular & Functional Enzymology , Sorbonne Universités , UPMC Univ Paris 06, UMR 8256 , Paris , France
| | - Chahrazade El Amri
- a B2A, Biological Adaptation and Ageing, Integrated Cellular Ageing and Inflammation, Molecular & Functional Enzymology , Sorbonne Universités , UPMC Univ Paris 06, UMR 8256 , Paris , France
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Fischer J, Meyer-Hoffert U. Regulation of kallikrein-related peptidases in the skin – from physiology to diseases to therapeutic options. Thromb Haemost 2017; 110:442-9. [DOI: 10.1160/th12-11-0836] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 01/25/2013] [Indexed: 12/21/2022]
Abstract
SummaryKallikrein-related peptidases (KLKs) constitute a family of 15 highly conserved serine proteases, which show a tissue-specific expression profile. This made them valuable tumour expression markers. It became evident that KLKs are involved in many physiological processes like semen liquefaction and skin desquamation. More recently, we have learnt that they are involved in many pathophysiological conditions and diseases making them promising target of therapeutic intervention. Therefore, regulation of KLKs raised the interest of numerous reports. Herein, we summarise the current knowledge on KLKs regulation with an emphasis on skin-relevant KLKs regulation processes. Regulation of KLKs takes place on the level of transcription, on protease activation and on protease inactivation. A variety of protease inhibitors has been described to interact with KLKs including the irreversible serine protease inhibitors (SERPINs) and the reversible serine protease inhibitors of Kazal-type (SPINKs). In an attempt to integrate current knowledge, we propose that KLK regulation has credentials as targets for therapeutic intervention.
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Xiu C, Hua Z, Xiao BS, Tang WJ, Zhou HP, Liu XH. Novel benzopyran derivatives and their therapeutic applications: a patent review (2009-2016). Expert Opin Ther Pat 2017. [PMID: 28627270 DOI: 10.1080/13543776.2017.1338687] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The benzopyran derivatives present a wide variety of biological activity and behaviour. At the same time the benzopyran derivatives support their use as therapeutic agents for multiple diseases. Their structural characteristics correlated to physicochemical properties seem to define the extent of the biological activity. Areas covered: This review summarizes new patents published on new benzopyran derivatives from 2009 to 2016. Expert opinion: Many benzopyran derivatives have vivo/vitro biological responses. Their clinical evaluation will be critical to assess therapeutic utility. The compounds containing benzopyran moiety is well defined as lead compounds for design of new more promising molecules.
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Affiliation(s)
- Cheng Xiu
- a School of Material Science Chemical Engineering , ChuZhou University , ChuZhou , P. R. China.,b School of Pharmacy , BengBu Medical College , BengBu , P. R. China
| | - Zhou Hua
- a School of Material Science Chemical Engineering , ChuZhou University , ChuZhou , P. R. China
| | - Bao Sheng Xiao
- a School of Material Science Chemical Engineering , ChuZhou University , ChuZhou , P. R. China
| | - Wen Jian Tang
- a School of Material Science Chemical Engineering , ChuZhou University , ChuZhou , P. R. China
| | - Hai Pin Zhou
- c School of Pharmacy , Anhui Medical University , Hefei , P. R. China
| | - Xin Hua Liu
- a School of Material Science Chemical Engineering , ChuZhou University , ChuZhou , P. R. China.,c School of Pharmacy , Anhui Medical University , Hefei , P. R. China
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23
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Masurier N, Arama DP, El Amri C, Lisowski V. Inhibitors of kallikrein-related peptidases: An overview. Med Res Rev 2017; 38:655-683. [DOI: 10.1002/med.21451] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 04/24/2017] [Accepted: 05/16/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Nicolas Masurier
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS; Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques; Montpellier Cedex France
| | - Dominique P. Arama
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS; Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques; Montpellier Cedex France
| | - Chahrazade El Amri
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8256; Biological Adaptation and Ageing, Integrated Cellular Ageing and Inflammation, Molecular & Functional Enzymology; Paris France
| | - Vincent Lisowski
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS; Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques; Montpellier Cedex France
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24
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Cheong KA, Lee TR, Lee AY. Complementary effect of hydroquinone and retinoic acid on corneocyte desquamation with their combination use. J Dermatol Sci 2017; 87:192-200. [PMID: 28433430 DOI: 10.1016/j.jdermsci.2017.03.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 02/09/2017] [Accepted: 03/29/2017] [Indexed: 10/19/2022]
Abstract
BACKGROUND Retinoic acid (RA) enhances skin-lightening capabilities of hydroquinone (HQ), at least in part, by facilitating desquamation which leads to increase penetration of HQ. The desquamation also affects skin irritation levels. The mechanism of RA-induced desquamation, however, has not been completely explored and no such data has been available for HQ uses. OBJECTIVE To examine the role of HQ, RA, and their combination in the desquamation. METHODS Primary cultured normal human keratinocytes, which were treated with HQ and/or RA in presence or absence of serine-specific inhibitor Kazal type5 (SPINK5)/lympho-epithelial Kazal-type-related inhibitor (LEKTI) knockdown or recombinant human SPINK5/LEKTI, and biopsied skin samples applied with HQ or RA were examined. Expression levels of corneodesmosin (CDSN), desmocollin1 (DSC1), kallikrein5 (KLK5), KLK7, and SPINK5/LEKTI, and proteolysis activity against extracted human skin epidermal protein were determined using time-course real-time PCR, Western blotting, ELISA, and immunofluorescence staining. RESULTS HQ increased but RA decreased the synthesis of CDSN and DSC1. HQ reduced corneodesmosome degradation by the upregulation of SPINK5/LEKTI, whereas RA showed opposite results without upregulation of SPINK5/LEKTI. The combination of HQ and RA was close to the sum of the individual components. CONCLUSIONS HQ reduced corneocyte desquamation. However, RA enhanced desquamation. The combination induced more desquamation than HQ but less than RA.
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Affiliation(s)
- Kyung Ah Cheong
- Department of Dermatology, Dongguk University Ilsan Hospital, 814 Siksa-dong, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-773, Republic of Korea
| | - Tae Ryong Lee
- Bioscience Institute, AmorePacific Corporation R&D Center, Yongin-si, Gyeonggi-do, 446-729, Republic of Korea
| | - Ai-Young Lee
- Department of Dermatology, Dongguk University Ilsan Hospital, 814 Siksa-dong, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-773, Republic of Korea.
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Wichmann K, Heratizadeh A, Werfel T. In-vitro diagnostic in atopic dermatitis: Options and limitations. Allergol Select 2017; 1:150-159. [PMID: 30402613 PMCID: PMC6040009 DOI: 10.5414/alx01549e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 08/21/2012] [Indexed: 12/02/2022] Open
Abstract
Atopic dermatitis is a chronic inflammatory skin disease with a complex pathogenesis and different exogenous and endogenous trigger factors. One important factor is the sensitization to inhalant and/or food allergens. The detection of total IgE and specific IgE antibodies to inhalant and/or food allergens is one central aspect in diagnosing atopic dermatitis, especially if skin prick tests are not feasible. Many patients are polysensitized, but not all sensitizations are of clinical relevance. The challenge is to identify the sensitizations with clinical relevance and to initiate suitable therapeutic options. In this article we go into detail for the allergens house dust mite, pollen, food, and Malassezia sympodialis. Furthermore, the authors comment on the impact of the detection of specific IgG/IgG4 antibodies in the diagnosis of food allergy in atopic dermatitis. Moreover, new options in the in-vitro diagnostic will be explained briefly and their actual diagnostic significance in patients with atopic dermatitis will be highlighted. These options are the detection of specific IgE antibodies to recombinant allergens and the allergen chip.
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Affiliation(s)
- K Wichmann
- Abteilung für Immundermatologie und experimentelle Allergologie, Klinik für Dermatologie, Allergologie und Venerologie, Medizinische Hochschule Hannover, Germany
| | - A Heratizadeh
- Abteilung für Immundermatologie und experimentelle Allergologie, Klinik für Dermatologie, Allergologie und Venerologie, Medizinische Hochschule Hannover, Germany
| | - T Werfel
- Abteilung für Immundermatologie und experimentelle Allergologie, Klinik für Dermatologie, Allergologie und Venerologie, Medizinische Hochschule Hannover, Germany
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26
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Kasparek P, Ileninova Z, Zbodakova O, Kanchev I, Benada O, Chalupsky K, Brattsand M, Beck IM, Sedlacek R. KLK5 and KLK7 Ablation Fully Rescues Lethality of Netherton Syndrome-Like Phenotype. PLoS Genet 2017; 13:e1006566. [PMID: 28095415 PMCID: PMC5283769 DOI: 10.1371/journal.pgen.1006566] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Revised: 01/31/2017] [Accepted: 01/04/2017] [Indexed: 11/18/2022] Open
Abstract
Netherton syndrome (NS) is a severe skin disease caused by the loss of protease inhibitor LEKTI, which leads to the dysregulation of epidermal proteases and severe skin-barrier defects. KLK5 was proposed as a major protease in NS pathology, however its inactivation is not sufficient to rescue the lethal phenotype of LEKTI-deficient mice. In this study, we further elucidated the in vivo roles of the epidermal proteases in NS using a set of mouse models individually or simultaneously deficient for KLK5 and KLK7 on the genetic background of a novel NS-mouse model. We show that although the ablation of KLK5 or KLK7 is not sufficient to rescue the lethal effect of LEKTI-deficiency simultaneous deficiency of both KLKs completely rescues the epidermal barrier and the postnatal lethality allowing mice to reach adulthood with fully functional skin and normal hair growth. We report that not only KLK5 but also KLK7 plays an important role in the inflammation and defective differentiation in NS and KLK7 activity is not solely dependent on activation by KLK5. Altogether, these findings show that unregulated activities of KLK5 and KLK7 are responsible for NS development and both proteases should become targets for NS therapy.
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Affiliation(s)
- Petr Kasparek
- Laboratory of Transgenic Models of Diseases, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
- Faculty of Sciences, Charles University in Prague, Prague, Czech Republic
| | - Zuzana Ileninova
- Laboratory of Transgenic Models of Diseases, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
| | - Olga Zbodakova
- Laboratory of Transgenic Models of Diseases, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
| | - Ivan Kanchev
- Czech Centre for Phenogenomics, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
| | - Oldrich Benada
- Laboratory of Molecular Structure Characterization, Institute of Microbiology of the Czech Academy of Sciences, v.v.i., Prague, Czech Republic
| | - Karel Chalupsky
- Laboratory of Transgenic Models of Diseases, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
- Czech Centre for Phenogenomics, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
| | - Maria Brattsand
- Department of Medical Biosciences, Pathology, Umea University, Umea, Sweden
| | - Inken M. Beck
- Czech Centre for Phenogenomics, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
| | - Radislav Sedlacek
- Laboratory of Transgenic Models of Diseases, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
- Czech Centre for Phenogenomics, Division BIOCEV, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i., Vestec, Czech Republic
- * E-mail:
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27
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McGovern J, Meinert C, de Veer S, Hollier B, Parker T, Upton Z. Attenuated kallikrein‐related peptidase activity disrupts desquamation and leads to stratum corneum thickening in human skin equivalent models. Br J Dermatol 2016; 176:145-158. [DOI: 10.1111/bjd.14879] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/20/2016] [Indexed: 12/29/2022]
Affiliation(s)
- J.A. McGovern
- Tissue Repair and Regeneration Program Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
- School of Biomedical Sciences Faculty of Health Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
| | - C. Meinert
- Cartilage Regeneration Laboratory Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
| | - S.J. de Veer
- Molecular Simulation Group Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
| | - B.G. Hollier
- Tissue Repair and Regeneration Program Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
| | - T.J. Parker
- Tissue Repair and Regeneration Program Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
- School of Biomedical Sciences Faculty of Health Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
| | - Z. Upton
- Tissue Repair and Regeneration Program Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
- School of Biomedical Sciences Faculty of Health Institute of Health and Biomedical Innovation Queensland University of Technology Brisbane Queensland Australia
- Institute of Medical Biology Agency for Science, Technology and Research (A*STAR) Biomedical Grove Singapore
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28
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de Veer SJ, Swedberg JE, Brattsand M, Clements JA, Harris JM. Exploring the active site binding specificity of kallikrein-related peptidase 5 (KLK5) guides the design of new peptide substrates and inhibitors. Biol Chem 2016; 397:1237-1249. [DOI: 10.1515/hsz-2016-0112] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 02/16/2016] [Indexed: 12/24/2022]
Abstract
Abstract
Kallikrein-related peptidase 5 (KLK5) is a promising therapeutic target in several skin diseases, including Netherton syndrome, and is emerging as a potential target in various cancers. In this study, we used a sparse matrix library of 125 individually synthesized peptide substrates to characterize the binding specificity of KLK5. The sequences most favored by KLK5 were GRSR, YRSR and GRNR, and we identified sequence-specific interactions involving the peptide N-terminus by analyzing kinetic constants (kcat and KM) and performing molecular dynamics simulations. KLK5 inhibitors were subsequently engineered by substituting substrate sequences into the binding loop (P1, P2 and P4 residues) of sunflower trypsin inhibitor-1 (SFTI-1). These inhibitors were effective against KLK5 but showed limited selectivity, and performing a further substitution at P2′ led to the design of a new variant that displayed improved activity against KLK5 (Ki=4.2±0.2 nm), weak activity against KLK7 and 12-fold selectivity over KLK14. Collectively, these findings provide new insight into the design of highly favored binding sequences for KLK5 and reveal several opportunities for modulating inhibitor selectivity over closely related proteases that will be useful for future studies aiming to develop therapeutic molecules targeting KLK5.
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29
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Sarri CA, Roussaki-Schulze A, Vasilopoulos Y, Zafiriou E, Patsatsi A, Stamatis C, Gidarokosta P, Sotiriadis D, Sarafidou T, Mamuris Z. Netherton Syndrome: A Genotype-Phenotype Review. Mol Diagn Ther 2016; 21:137-152. [DOI: 10.1007/s40291-016-0243-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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30
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Williams MR, Nakatsuji T, Sanford JA, Vrbanac AF, Gallo RL. Staphylococcus aureus Induces Increased Serine Protease Activity in Keratinocytes. J Invest Dermatol 2016; 137:377-384. [PMID: 27765722 DOI: 10.1016/j.jid.2016.10.008] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/22/2016] [Accepted: 10/08/2016] [Indexed: 01/08/2023]
Abstract
Bacteria that reside on the skin can influence the behavior of the cutaneous immune system, but the mechanisms responsible for these effects are incompletely understood. Colonization of the skin by Staphylococcus aureus (S. aureus) is increased in atopic dermatitis and can result in increased severity of the disease. In this study, we show that S. aureus stimulates human keratinocytes to increase their endogenous protease activity, including specific increases in trypsin activity. This increased protease activity coincided with increased expression of mRNA for kallikreins (KLKs), with KLK6, 13, and 14 showing the greatest induction after exposure to S. aureus. Suppression of mRNA for these KLKs in keratinocytes by targeted small interfering RNA silencing before S. aureus exposure blocked the increase in protease activity. Keratinocytes exposed to S. aureus showed enhanced degradation of desmoglein-1 and filaggrin, whereas small interfering RNA for KLK6, KLK13, and KLK14 partially blocked this degradation. These data illustrate how S. aureus directly influences the skin barrier integrity by stimulating endogenous proteolytic activity and defines a previously unknown mechanism by which S. aureus may influence skin diseases.
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Affiliation(s)
- Michael R Williams
- Department of Dermatology, University of California, San Diego, California, USA
| | - Teruaki Nakatsuji
- Department of Dermatology, University of California, San Diego, California, USA
| | - James A Sanford
- Department of Dermatology, University of California, San Diego, California, USA
| | - Alison F Vrbanac
- Department of Dermatology, University of California, San Diego, California, USA
| | - Richard L Gallo
- Department of Dermatology, University of California, San Diego, California, USA.
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31
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Numata S, Teye K, Krol RP, Okamatsu Y, Hashikawa K, Matsuda M, Fortugno P, Di Zenzo G, Castiglia D, Zambruno G, Hamada T, Hashimoto T. A compound synonymous mutation c.474G>A with p.Arg578X mutation inSPINK5causes splicing disorder and mild phenotype in Netherton syndrome. Exp Dermatol 2016; 25:568-70. [DOI: 10.1111/exd.13011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Sanae Numata
- Department of Dermatology; Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology; Fukuoka Japan
| | - Kwesi Teye
- Department of Dermatology; Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology; Fukuoka Japan
| | - Rafal P. Krol
- Department of Dermatology; Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology; Fukuoka Japan
| | - Yuki Okamatsu
- Department of Pediatrics and Child Health; Kurume University School of Medicine; Fukuoka Japan
| | - Keiko Hashikawa
- Department of Dermatology; Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology; Fukuoka Japan
| | - Mitsuhiro Matsuda
- Department of Dermatology; Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology; Fukuoka Japan
| | - Paola Fortugno
- Laboratory of Molecular and Cell Biology; Istituto Dermopatico dell'Immacolata IDI-IRCCS; Rome Italy
| | - Giovanni Di Zenzo
- Laboratory of Molecular and Cell Biology; Istituto Dermopatico dell'Immacolata IDI-IRCCS; Rome Italy
| | - Daniele Castiglia
- Laboratory of Molecular and Cell Biology; Istituto Dermopatico dell'Immacolata IDI-IRCCS; Rome Italy
| | - Giovanna Zambruno
- Laboratory of Molecular and Cell Biology; Istituto Dermopatico dell'Immacolata IDI-IRCCS; Rome Italy
| | - Takahiro Hamada
- Department of Dermatology; Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology; Fukuoka Japan
| | - Takashi Hashimoto
- Department of Dermatology; Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology; Fukuoka Japan
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Skin pH Is the Master Switch of Kallikrein 5-Mediated Skin Barrier Destruction in a Murine Atopic Dermatitis Model. J Invest Dermatol 2016; 136:127-35. [PMID: 26763432 DOI: 10.1038/jid.2015.363] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 08/05/2015] [Accepted: 08/18/2015] [Indexed: 11/09/2022]
Abstract
Elevated skin surface pH has been reported in patients with atopic dermatitis. In this study, we explored the role of skin pH in the pathogenesis of atopic dermatitis using the NC/Tnd murine atopic dermatitis model. Alkalinization of the skin of asymptomatic NC/Tnd mice housed in specific pathogen-free conditions induced kallikrein 5 and activated protease-activated receptor 2, resulting in thymic stromal lymphopoietin secretion and a cutaneous T-helper 2 allergic response. This was associated with increased transepidermal water loss and development of eczematous lesions in these specific pathogen-free NC/Tnd mice, which normally do not suffer from atopic dermatitis. Injection of recombinant thymic stromal lymphopoietin also induced scratching behavior in the specific pathogen-free NC/Tnd mice. Thymic stromal lymphopoietin production and dermatitis induced by alkalinization of the skin could be blocked by the protease-activated receptor 2 antagonist ENMD-1068. In contrast, weak acidification of eczematous skin in conventionally housed NC/Tnd mice reduced kallikrein 5 activity and ameliorated the dermatitis. Onset of the dermatitis was associated with increased epidermal filaggrin expression and impaired activity of the sodium/hydrogen exchanger 1, a known regulator of skin pH. We conclude that alterations in skin pH directly modulate kallikrein 5 activity leading to skin barrier dysfunction, itch, and dermatitis via the protease-activated receptor 2-thymic stromal lymphopoietin pathway.
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33
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KLK5 Inactivation Reverses Cutaneous Hallmarks of Netherton Syndrome. PLoS Genet 2015; 11:e1005389. [PMID: 26390218 PMCID: PMC4577096 DOI: 10.1371/journal.pgen.1005389] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 06/23/2015] [Indexed: 02/06/2023] Open
Abstract
Netherton Syndrome (NS) is a rare and severe autosomal recessive skin disease which can be life-threatening in infants. The disease is characterized by extensive skin desquamation, inflammation, allergic manifestations and hair shaft defects. NS is caused by loss-of-function mutations in SPINK5 encoding the LEKTI serine protease inhibitor. LEKTI deficiency results in unopposed activities of kallikrein-related peptidases (KLKs) and aberrantly increased proteolysis in the epidermis. Spink5⁻/⁻ mice recapitulate the NS phenotype, display enhanced epidermal Klk5 and Klk7 protease activities and die within a few hours after birth because of a severe skin barrier defect. However the contribution of these various proteases in the physiopathology remains to be determined. In this study, we developed a new murine model in which Klk5 and Spink5 were both knocked out to assess whether Klk5 deletion is sufficient to reverse the NS phenotype in Spink5⁻/⁻ mice. By repeated intercrossing between Klk5⁻/⁻ mice with Spink5⁻/⁻ mice, we generated Spink5⁻/⁻Klk5⁻/⁻ animals. We showed that Klk5 knock-out in Lekti-deficient newborn mice rescues neonatal lethality, reverses the severe skin barrier defect, restores epidermal structure and prevents skin inflammation. Specifically, using in situ zymography and specific protease substrates, we showed that Klk5 knockout reduced epidermal proteolytic activity, particularly its downstream targets proteases KLK7, KLK14 and ELA2. By immunostaining, western blot, histology and electron microscopy analyses, we provide evidence that desmosomes and corneodesmosomes remain intact and that epidermal differentiation is restored in Spink5⁻/⁻Klk5⁻/⁻. Quantitative RT-PCR analyses and immunostainings revealed absence of inflammation and allergy in Spink5⁻/⁻Klk5⁻/⁻ skin. Notably, Il-1β, Il17A and Tslp levels were normalized. Our results provide in vivo evidence that KLK5 knockout is sufficient to reverse NS-like symptoms manifested in Spink5⁻/⁻ skin. These findings illustrate the crucial role of protease regulation in skin homeostasis and inflammation, and establish KLK5 inhibition as a major therapeutic target for NS.
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Dal Mas A, Fortugno P, Donadon I, Levati L, Castiglia D, Pagani F. Exon-Specific U1s Correct SPINK5 Exon 11 Skipping Caused by a Synonymous Substitution that Affects a Bifunctional Splicing Regulatory Element. Hum Mutat 2015; 36:504-12. [PMID: 25665175 DOI: 10.1002/humu.22762] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 01/27/2015] [Indexed: 12/20/2022]
Abstract
The c.891C>T synonymous transition in SPINK5 induces exon 11 (E11) skipping and causes Netherton syndrome (NS). Using a specific RNA-protein interaction assay followed by mass spectrometry analysis along with silencing and overexpression of splicing factors, we showed that this mutation affects an exonic bifunctional splicing regulatory element composed by two partially overlapping silencer and enhancer sequences, recognized by hnRNPA1 and Tra2β splicing factors, respectively. The C-to-T substitution concomitantly increases hnRNPA1 and weakens Tra2β-binding sites, leading to pathological E11 skipping. In hybrid minigenes, exon-specific U1 small nuclear RNAs (ExSpe U1s) that target by complementarity intronic sequences downstream of the donor splice site rescued the E11 skipping defect caused by the c.891C>T mutation. ExSpe U1 lentiviral-mediated transduction of primary NS keratinocytes from a patient bearing the mutation recovered the correct full-length SPINK5 mRNA and the corresponding functional lympho-epithelial Kazal-type related inhibitor protein in a dose-dependent manner. This study documents the reliability of a mutation-specific, ExSpe U1-based, splicing therapy for a relatively large subset of European NS patients. Usage of ExSpe U1 may represent a general approach for correction of splicing defects affecting skin disease genes.
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Affiliation(s)
- Andrea Dal Mas
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Human Molecular Genetics, Trieste, Italy
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35
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Kiritsi D, Valari M, Fortugno P, Hausser I, Lykopoulou L, Zambruno G, Fischer J, Bruckner-Tuderman L, Jakob T, Has C. Whole-exome sequencing in patients with ichthyosis reveals modifiers associated with increased IgE levels and allergic sensitizations. J Allergy Clin Immunol 2015; 135:280-3. [DOI: 10.1016/j.jaci.2014.09.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/16/2014] [Accepted: 09/22/2014] [Indexed: 02/06/2023]
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Singh B, Haftek M, Harding CR. Retention of corneodesmosomes and increased expression of protease inhibitors in dandruff. Br J Dermatol 2014; 171:760-70. [PMID: 24815089 DOI: 10.1111/bjd.13111] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2014] [Indexed: 12/22/2022]
Abstract
BACKGROUND Dandruff is a common, relapsing and uncomfortable scalp condition affecting a large proportion of the global population. The appearance of flakes on the scalp and in the hair line, and associated itch are thought to be consequences of a damaged skin barrier, altered corneocyte cohesion and abnormal desquamation in dandruff. The balance between skin proteases and protease inhibitors is essential for driving the key events, including corneodesmosome degradation, in the desquamation process and to maintain stratum corneum (SC) barrier integrity. OBJECTIVES To investigate the distribution of corneodesmosomes, the key component of the SC cohesivity and barrier function, and the protease inhibitors lympho-epithelial Kazal-type-related inhibitor (LEKTI-1) and squamous cell carcinoma antigen (SCCA1) in the scalp of dandruff-affected participants. METHODS The methods utilized were immunohistochemistry, scanning immunoelectron microscopy, phase-contrast microscopy, Western blotting and serine protease activity assay on tape-stripped SC or scalp skin biopsies. RESULTS In SC samples from healthy subjects, corneodesmosomes were peripherally located in the corneocytes. In samples of dandruff lesions, corneodesmosomes were located both peripherally and on the entire surface area of the corneocytes. LEKTI-1 and SCCA1 protein levels and parakeratosis were found to be highly elevated in the lesional samples. CONCLUSIONS The persistence of nonperipheral corneodesmosomes is a characteristic feature of the perturbed desquamation seen in dandruff. The increased expression levels of LEKTI-1 and SCCA1 are consistent with the view that the dandruff condition is characterized by an imbalance in protease-protease inhibitor interaction in the SC.
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Affiliation(s)
- B Singh
- Unilever Research & Development, Port Sunlight, Bebington, U.K
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de Veer SJ, Furio L, Harris JM, Hovnanian A. Proteases: common culprits in human skin disorders. Trends Mol Med 2014; 20:166-78. [DOI: 10.1016/j.molmed.2013.11.005] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 11/24/2013] [Accepted: 11/25/2013] [Indexed: 12/17/2022]
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Furio L, de Veer S, Jaillet M, Briot A, Robin A, Deraison C, Hovnanian A. Transgenic kallikrein 5 mice reproduce major cutaneous and systemic hallmarks of Netherton syndrome. ACTA ACUST UNITED AC 2014; 211:499-513. [PMID: 24534191 PMCID: PMC3949577 DOI: 10.1084/jem.20131797] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Netherton syndrome (NS) is a severe genetic skin disease in which absence of a key protease inhibitor causes congenital exfoliative erythroderma, eczematous-like lesions, and atopic manifestations. Several proteases are overactive in NS, including kallikrein-related peptidase (KLK) 5, KLK7, and elastase-2 (ELA2), which are suggested to be part of a proteolytic cascade initiated by KLK5. To address the role of KLK5 in NS, we have generated a new transgenic murine model expressing human KLK5 in the granular layer of the epidermis (Tg-KLK5). Transgene expression resulted in increased proteolytic activity attributable to KLK5 and its downstream targets KLK7, KLK14, and ELA2. Tg-KLK5 mice developed an exfoliative erythroderma with scaling, growth delay, and hair abnormalities. The skin barrier was defective and the stratum corneum was detached through desmosomal cleavage. Importantly, Tg-KLK5 mice displayed cutaneous and systemic hallmarks of severe inflammation and allergy with pruritus. The skin showed enhanced expression of inflammatory cytokines and chemokines, infiltration of immune cells, and markers of Th2/Th17/Th22 T cell responses. Moreover, serum IgE and Tslp levels were elevated. Our study identifies KLK5 as an important contributor to the NS proteolytic cascade and provides a new and viable model for the evaluation of future targeted therapies for NS or related diseases such as atopic dermatitis.
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Affiliation(s)
- Laetitia Furio
- Université Paris Descartes-Sorbonne Paris Cité, 75006 Paris, France
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Elias PM, Sun R, Eder AR, Wakefield JS, Man MQ. Treating atopic dermatitis at the source: corrective barrier repair therapy based upon new pathogenic insights. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/edm.12.73] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Miyai M, Matsumoto Y, Yamanishi H, Yamamoto-Tanaka M, Tsuboi R, Hibino T. Keratinocyte-specific mesotrypsin contributes to the desquamation process via kallikrein activation and LEKTI degradation. J Invest Dermatol 2014; 134:1665-1674. [PMID: 24390132 DOI: 10.1038/jid.2014.3] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 10/15/2013] [Accepted: 10/15/2013] [Indexed: 11/09/2022]
Abstract
Kallikrein-related peptidases (KLKs) have critical roles in corneocyte desquamation and are regulated by lymphoepithelial Kazal-type inhibitor (LEKTI). However, it is unclear how these proteases are activated and how activated KLKs are released from LEKTI in the upper cornified layer. Recently, we reported cloning of a PRSS3 gene product, keratinocyte-specific mesotrypsin, from a cDNA library. We hypothesized that mesotrypsin is involved in the desquamation process, and the aim of the present study was to test this idea by examining the effects of mesotrypsin on representative desquamation-related enzymes pro-KLK5 and pro-KLK7. Incubation of mesotrypsin and these zymogens resulted in generation of the active forms. KLK activities were effectively inhibited by recombinant LEKTI domains D2, D2-5, D2-6, D2-7, D5, D6, D6-9, D7, D7-9, and D10-15, whereas mesotrypsin activity was not susceptible to these domains, and in fact degraded them. Immunoelectron microscopy demonstrated that mesotrypsin was localized in the cytoplasm of granular cells and intercellular spaces of the cornified layer. Proximity ligation assay showed close association between mesotrypsin and KLKs in the granular to cornified layers. Age-dependency analysis revealed that mesotrypsin was markedly downregulated in corneocyte extract from donors in their sixties, compared with younger donors. Collectively, our findings suggest that mesotrypsin contributes to the desquamation process by activating KLKs and degrading the intrinsic KLKs' inhibitor LEKTI.
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Affiliation(s)
- Masashi Miyai
- Shiseido Research Center, Kanazawa-ku, Yokohama, Japan
| | | | | | - Mami Yamamoto-Tanaka
- Shiseido Research Center, Kanazawa-ku, Yokohama, Japan; Department of Dermatology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
| | - Ryoji Tsuboi
- Department of Dermatology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
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Israeli S, Sarig O, Garty BZ, Indelman M, Bergman R, Sprecher E, Goldberg I. Molecular Analysis of a Series of Israeli Families with Comèl-Netherton Syndrome. Dermatology 2014; 228:183-8. [DOI: 10.1159/000357560] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 11/26/2013] [Indexed: 11/19/2022] Open
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Abstract
During the past 20 years, tremendous progress has been made in our understanding of the molecular basis of many genetic skin conditions. The translation of these laboratory findings into effective therapies for affected individuals has been slow, however, in large part due to the risk of carcinogenesis from random viral genomic integration and the lack of efficacy of topically applied genetic material and most proteins. As intervention at the gene level still appears remote for most genetic disorders, increased knowledge about the cellular and biochemical pathogenesis of disease allows specific targeting of pathways with existing and/or novel drugs and molecules. In contrast to the requirement for personalization of most gene-based approaches, pathogenesis-based therapy is pathway specific, and in theory, it should have broader applicability. In this chapter, we provide an overview of the pathoetiology of the various types of ichthyoses and demonstrate how a pathogenesis-based approach can potentially lead to innovative treatments for these conditions. Notably, this strategy has been successfully validated for the treatment of the rare X-linked dominant condition, CHILD syndrome, in which topical applications of cholesterol and lovastatin together to affected skin resulted in marked improvement of the skin phenotype.
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Affiliation(s)
- Joey E Lai-Cheong
- St John's Institute of Dermatology, King's College London, London, United Kingdom
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Abstract
Management of ichthyoses is a complex and continuously dynamic process. Primary treatments of ichthyosis are by means of topical moisturizers and topical medications. Patients and families need to have reasonable and realistic expectations when it comes to topical therapy. Topical medications cannot cure the scaling, but can gradually reduce it and thus improve their condition. No one treatment regimen works for everyone, and the best topical therapy for each patient may be the result of months (or years) of painstaking effort on both the physician's and the patient's behalf. As patients get older and their activities and lifestyles change, so should their topical treatment regimen. Bear in mind that the more complex the skin care regimen and costly the topical treatments, the less likely a patient and their family will be compliant.
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Affiliation(s)
- Philip Fleckman
- Dermatology, University of Washington, Seattle, WA 98105, USA.
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Netherton syndrome: skin inflammation and allergy by loss of protease inhibition. Cell Tissue Res 2013; 351:289-300. [DOI: 10.1007/s00441-013-1558-1] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 12/17/2012] [Indexed: 01/31/2023]
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Cross-linking of SPINK6 by transglutaminases protects from epidermal proteases. J Invest Dermatol 2013; 133:1170-7. [PMID: 23303447 DOI: 10.1038/jid.2012.482] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Extracellular kallikrein-related peptidases (KLKs) are involved in the desquamation process and the initiation of epidermal inflammation by different mechanisms. Their action is tightly controlled by specific protease inhibitors. Recently, we have identified the serine protease inhibitor of Kazal-type (SPINK) 6 as a selective inhibitor of KLKs in human stratum corneum extracts. As SPINK6 is expressed in the same localization as transglutaminases (TGM) and contains TGM substrate motifs, SPINK6 was tested to be cross-linked in the epidermis. Recombinant SPINK6 was shown to be cross-linked to fibronectin (FN) by TGM1 by western blot analyses. Moreover, SPINK6 was cross-linked in epidermal extracts and cultured keratinocytes by immunoblotting analyses. The use of TGM1 and TGM3 resulted in different immunoreactivities in western blot analyses of SPINK6 and epidermal extracts, suggesting substrate specifities of different TGMs for SPINK6 cross-linking in the epidermis. Conjugated SPINK6 exhibited protease inhibitory activity in keratinocytes and stratum corneum extracts; cross-linked SPINK6 protected FN from KLK5-mediated cleavage, whereas a lower KLK-inhibiting SPINK6-GM mutation did not. In conclusion, we demonstrated that SPINK6 is cross-linked in keratinocytes and human epidermis and remains inhibitory active. Thus, cross-linked SPINK6 might protect specific substrates such as FN from KLK cleavage and contributes to the regulation of proteases in the epidermis.
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Harlequin ichthyosis: ABCA12 mutations underlie defective lipid transport, reduced protease regulation and skin-barrier dysfunction. Cell Tissue Res 2012; 351:281-8. [PMID: 22864982 DOI: 10.1007/s00441-012-1474-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 06/21/2012] [Indexed: 01/09/2023]
Abstract
Harlequin ichthyosis (HI) is a devastating autosomal recessive congenital skin disease. It has been vital to elucidate the biological importance of the protein ABCA12 in skin-barrier permeability, following the discovery that ABCA12 gene mutations can result in this rare disease. ATP-binding cassette transporter A12 (ABCA12) is a member of the subfamily of ATP-binding cassette transporters and functions to transport lipid glucosylceramides (GlcCer) to the extracellular space through lamellar granules (LGs). GlcCer are hydrolysed into hydroxyceramides extracellularly and constitute a portion of the extracellular lamellar membrane, lipid envelope and lamellar granules. In HI skin, loss of function of ABCA12 due to null mutations results in impaired lipid lamellar membrane formation in the cornified layer, leading to defective permeability of the skin barrier. In addition, abnormal lamellar granule formation (distorted shape, reduced in number or absent) could further cause aberrant production of LG-associated desquamation enzymes, which are likely to contribute to the impaired skin barrier in HI. This article reviews current opinions on the patho-mechanisms of ABCA12 action in HI and potential therapeutic interventions based on targeted molecular therapy and gene therapy strategies.
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Fortugno P, Furio L, Teson M, Berretti M, El Hachem M, Zambruno G, Hovnanian A, D'Alessio M. The 420K LEKTI variant alters LEKTI proteolytic activation and results in protease deregulation: implications for atopic dermatitis. Hum Mol Genet 2012; 21:4187-200. [DOI: 10.1093/hmg/dds243] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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Fortugno P, Grosso F, Zambruno G, Pastore S, Faletra F, Castiglia D. A synonymous mutation in SPINK5 exon 11 causes Netherton syndrome by altering exonic splicing regulatory elements. J Hum Genet 2012; 57:311-5. [DOI: 10.1038/jhg.2012.22] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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When activity requires breaking up: LEKTI proteolytic activation cascade for specific proteinase inhibition. J Invest Dermatol 2012; 131:2169-73. [PMID: 21997416 DOI: 10.1038/jid.2011.295] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Lymphoepithelial Kazal-type related inhibitor (LEKTI) is a multidomain proteinase inhibitor whose defective expression causes Netherton syndrome (NS). LEKTI is encoded by SPINK5, which is also a susceptibility gene for atopic disease. In this issue, Fortugno et al. report an elegant and thorough study of the LEKTI proteolytic activation process in which they identify the precise nature of the cleavage sites used and the bioactive fragments generated. They propose a proteolytic activation model in human skin and confirm differential inhibition of kallikrein (KLK) 5, 7, and 14 by the major physiological LEKTI fragments. They show that these bioactive fragments inhibit KLK-mediated proteolysis of desmoglein 1 (DSG1) and suggest a fine-tuned inhibition process controlling target serine proteinase (SP) activity.
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