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Cathepsin D inhibitors based on tasiamide B derivatives with cell membrane permeability. Bioorg Med Chem 2022; 57:116646. [DOI: 10.1016/j.bmc.2022.116646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/22/2022] [Accepted: 01/26/2022] [Indexed: 11/21/2022]
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Goyal S, Patel KV, Nagare Y, Raykar DB, Raikar SS, Dolas A, Khurana P, Cyriac R, Sarak S, Gangar M, Agarwal AK, Kulkarni A. Identification and structure-activity relationship studies of small molecule inhibitors of the human cathepsin D. Bioorg Med Chem 2020; 29:115879. [PMID: 33271453 DOI: 10.1016/j.bmc.2020.115879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 11/08/2020] [Accepted: 11/13/2020] [Indexed: 01/18/2023]
Abstract
Cathepsin D, an aspartyl protease, is an attractive therapeutic target for various diseases, primarily cancer and osteoarthritis. However, despite several small molecule cathepsin D inhibitors being developed, that are highly potent, most of them show poor microsomal stability, which in turn limits their clinical translation. Herein, we describe the design, optimization and evaluation of a series of novel non-peptidic acylguanidine based small molecule inhibitors of cathepsin D. Optimization of our hit compound 1a (IC50 = 29 nM) led to the highly potent mono sulphonamide analogue 4b (IC50 = 4 nM), however with poor microsomal stability (HLM: 177 and MLM: 177 μl/min/mg). To further improve the microsomal stability while retaining the potency, we carried out an extensive structure-activity relationship screen which led to the identification of our optimised lead 24e (IC50 = 45 nM), with an improved microsomal stability (HLM: 59.1 and MLM: 86.8 μl/min/mg). Our efforts reveal that 24e could be a good starting point or potential candidate for further preclinical studies against diseases where Cathepsin D plays an important role.
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Affiliation(s)
| | | | - Yadav Nagare
- Aten Porus Lifesciences, Bangalore 560068, India
| | | | | | - Atul Dolas
- Aten Porus Lifesciences, Bangalore 560068, India
| | | | | | - Sharad Sarak
- Aten Porus Lifesciences, Bangalore 560068, India
| | | | - Anil K Agarwal
- Department of Chemistry, CHRIST (Deemed to be University), Bengaluru, Karnataka, India
| | - Aditya Kulkarni
- Aten Porus Lifesciences, Bangalore 560068, India; Avaliv Therapeutics, Naples, FL, USA.
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Ding L, Goossens GH, Oligschlaeger Y, Houben T, Blaak EE, Shiri-Sverdlov R. Plasma cathepsin D activity is negatively associated with hepatic insulin sensitivity in overweight and obese humans. Diabetologia 2020; 63:374-384. [PMID: 31690989 PMCID: PMC6946744 DOI: 10.1007/s00125-019-05025-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 09/13/2019] [Indexed: 01/19/2023]
Abstract
AIMS/HYPOTHESIS Insulin resistance in skeletal muscle and liver plays a major role in the pathophysiology of type 2 diabetes. The hyperinsulinaemic-euglycaemic clamp is considered the gold standard for assessing peripheral and hepatic insulin sensitivity, yet it is a costly and labour-intensive procedure. Therefore, easy-to-measure, cost-effective approaches to determine insulin sensitivity are needed to enable organ-specific interventions. Recently, evidence emerged that plasma cathepsin D (CTSD) is associated with insulin sensitivity and hepatic inflammation. Here, we aimed to investigate whether plasma CTSD is associated with hepatic and/or peripheral insulin sensitivity in humans. METHODS As part of two large clinical trials (one designed to investigate the effects of antibiotics, and the other to investigate polyphenol supplementation, on insulin sensitivity), 94 overweight and obese adults (BMI 25-35 kg/m2) previously underwent a two-step hyperinsulinaemic-euglycaemic clamp (using [6,6-2H2]glucose) to assess hepatic and peripheral insulin sensitivity (per cent suppression of endogenous glucose output during the low-insulin-infusion step, and the rate of glucose disappearance during high-insulin infusion [40 mU/(m2 × min)], respectively). In this secondary analysis, plasma CTSD levels, CTSD activity and plasma inflammatory cytokines were measured. RESULTS Plasma CTSD levels were positively associated with the proinflammatory cytokines IL-8 and TNF-α (IL-8: standardised β = 0.495, p < 0.001; TNF-α: standardised β = 0.264, p = 0.012). Plasma CTSD activity was negatively associated with hepatic insulin sensitivity (standardised β = -0.206, p = 0.043), independent of age, sex, BMI and waist circumference, but it was not associated with peripheral insulin sensitivity. However, plasma IL-8 and TNF-α were not significantly correlated with hepatic insulin sensitivity. CONCLUSIONS/INTERPRETATION We demonstrate that plasma CTSD activity, but not systemic inflammation, is inversely related to hepatic insulin sensitivity, suggesting that plasma CTSD activity may be used as a non-invasive marker for hepatic insulin sensitivity in humans.
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Affiliation(s)
- Lingling Ding
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Universiteitssingel 50, 6229 ER, Maastricht, the Netherlands
| | - Gijs H Goossens
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Universiteitssingel 50, 6229 ER, Maastricht, the Netherlands
| | - Yvonne Oligschlaeger
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Universiteitssingel 50, 6229 ER, Maastricht, the Netherlands
| | - Tom Houben
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Universiteitssingel 50, 6229 ER, Maastricht, the Netherlands
| | - Ellen E Blaak
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Universiteitssingel 50, 6229 ER, Maastricht, the Netherlands.
| | - Ronit Shiri-Sverdlov
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Universiteitssingel 50, 6229 ER, Maastricht, the Netherlands.
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Li Z, Bao K, Xu H, Wu P, Li W, Liu J, Zhang W. Design, synthesis, and bioactivities of tasiamide B derivatives as cathepsin D inhibitors. J Pept Sci 2019; 25:e3154. [PMID: 30734395 DOI: 10.1002/psc.3154] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/04/2019] [Accepted: 01/15/2019] [Indexed: 01/28/2023]
Abstract
Cathepsin D (Cath D) is overexpressed and hypersecreted by malignant tumors and involved in the progress of tumor invasion, proliferation, metastasis, and apoptosis. Cath D has been considered as a potential target to treat cancer. Our previous studies revealed that tasiamide B derivatives TB-9 and TB-11 exhibited high potent inhibition against Cath D and other aspartic proteases, but their molecular weights are still high, and the role of each residue is unknown yet. Based on this, two series of tasiamide B derivatives have been designed, synthesized, and evaluated for their inhibitory activity against Cath D/Cath E/BACE1. Enzymatic assays revealed that the target compound 1 with lower molecule weight showed good inhibitory activity against Cath D with IC50 of 3.29 nM and satisfactory selectivity over Cath E (72-fold) and BACE1 (295-fold), which could be a valuable template for the design of highly potent and selective Cath D inhibitors.
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Affiliation(s)
- Zhi Li
- School of Pharmacy, Nanjing University of Chinese Medicine, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing, China
| | - Keting Bao
- School of Pharmacy, Fudan University, Shanghai, China
| | - Hao Xu
- School of Pharmacy, Fudan University, Shanghai, China
| | - Ping Wu
- School of Pharmacy, Fudan University, Shanghai, China
| | - Wei Li
- School of Pharmacy, Nanjing University of Chinese Medicine, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing, China
| | - Jian Liu
- School of Pharmacy, Nanjing University of Chinese Medicine, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing, China
| | - Wei Zhang
- School of Pharmacy, Fudan University, Shanghai, China
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Masaki H, Yamashita Y, Kyotani D, Honda T, Takano K, Tamura T, Mizutani T, Okano Y. Correlations between skin hydration parameters and corneocyte-derived parameters to characterize skin conditions. J Cosmet Dermatol 2018; 18:308-314. [PMID: 29603859 DOI: 10.1111/jocd.12502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND Skin hydration is generally assessed using the parameters of skin surface water content (SWC) and trans-epidermal water loss (TEWL). To date, few studies have characterized skin conditions using correlations between skin hydration parameters and corneocyte parameters. AIMS The parameters SWC and TEWL allow the classification of skin conditions into four distinct Groups. The purpose of this study was to assess the characteristics of skin conditions classified by SWC and TEWL for correlations with parameters from corneocytes. METHODS A human volunteer test was conducted that measured SWC and TEWL. As corneocyte-derived parameters, the size and thick abrasion ratios, the ratio of sulfhydryl groups and disulfide bonds (SH/SS) and CP levels were analyzed. RESULTS Volunteers were classified by their median SWC and TEWL values into 4 Groups: Group I (high SWC/low TEWL), Group II (high SWC/high TEWL), Group III (low SWC/low TEWL), and Group IV (low SWC/high TEWL). Group IV showed a significantly smaller size of corneocytes. Groups III and IV had significantly higher thick abrasion ratios and CP levels. Group I had a significantly lower SH/SS value. The SWC/TEWL value showed a decline in order from Group I to Group IV. CONCLUSION Groups classified by their SWC and TEWL values showed characteristic skin conditions. We propose that the SWC and TEWL ratio is a comprehensive parameter to assess skin conditions.
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Affiliation(s)
- Hitoshi Masaki
- School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo, Japan
| | | | | | | | | | | | - Taeko Mizutani
- School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo, Japan
| | - Yuri Okano
- School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo, Japan
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Tan K, Brasch HD, van Schaijik B, Armstrong JR, Marsh RW, Davis PF, Tan ST, Itinteang T. Expression and Localization of Cathepsins B, D, and G in Dupuytren's Disease. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2018; 6:e1686. [PMID: 29616179 PMCID: PMC5865920 DOI: 10.1097/gox.0000000000001686] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 01/05/2018] [Indexed: 01/03/2023]
Abstract
BACKGROUND The pathogenesis of Dupuytren's disease (DD) remains unclear. An embryonic stem cell (ESC)-like population in the endothelium of the microvessels around tissues that expresses components of the renin-angiotensin system (RAS) has been reported. This study investigated if this primitive population expresses cathepsins B, D, and G, that contribute to RAS bypass loops. METHODS 3,3-Diaminobenzidine immunohistochemical (IHC) staining for cathepsins B, D, and G was performed on sections of formalin-fixed paraffin-embedded DD cords (n = 10) and nodules (n = 10). Immunofluorescence IHC staining was utilized to demonstrate co-expression of these cathepsins with ESC markers. Protein and gene expression of these cathepsins was investigated in snap-frozen DD cords (n = 3) and nodules (n = 3) by Western blotting and NanoString analysis, respectively. Enzymatic activity of these cathepsins was investigated by enzymatic activity assays. RESULTS 3,3-Diaminobenzidine IHC staining demonstrated expression of cathepsins B, D, and G in DD cords and nodules. Gene expression of cathepsins B, D, and G was confirmed by NanoString analysis. Western blotting confirmed expression of cathepsins B and D, but not cathepsin G. Immunofluorescent IHC staining demonstrated high abundance of cathepsins B and D on the OCT4+/angiotensin converting enzyme+ endothelium and the smooth muscle layer of the microvessels. Cathepsin G was localized to trypase+ cells within the stroma in DD cords and nodules with limited expression on the microvessels. Enzyme activity assays demonstrated functional activity of cathepsins B and D. CONCLUSIONS Cathepsins B, D, and G were expressed in the DD tissues, with cathepsins B and D localized to the primitive population in the endothelium of the microvessels, whereas cathepsin G was localized to phenotypic mast cells, suggesting the presence of bypass loops for the RAS.
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Affiliation(s)
- Kirin Tan
- From the Gillies McIndoe Research Institute, Wellington, New Zealand; Wellington Regional Plastic, Maxillofacial & Burns Unit, Hutt Hospital, Wellington, New Zealand; and University of Auckland, Auckland, New Zealand
| | - Helen D. Brasch
- From the Gillies McIndoe Research Institute, Wellington, New Zealand; Wellington Regional Plastic, Maxillofacial & Burns Unit, Hutt Hospital, Wellington, New Zealand; and University of Auckland, Auckland, New Zealand
| | - Bede van Schaijik
- From the Gillies McIndoe Research Institute, Wellington, New Zealand; Wellington Regional Plastic, Maxillofacial & Burns Unit, Hutt Hospital, Wellington, New Zealand; and University of Auckland, Auckland, New Zealand
| | - James R. Armstrong
- From the Gillies McIndoe Research Institute, Wellington, New Zealand; Wellington Regional Plastic, Maxillofacial & Burns Unit, Hutt Hospital, Wellington, New Zealand; and University of Auckland, Auckland, New Zealand
| | - Reginald W. Marsh
- From the Gillies McIndoe Research Institute, Wellington, New Zealand; Wellington Regional Plastic, Maxillofacial & Burns Unit, Hutt Hospital, Wellington, New Zealand; and University of Auckland, Auckland, New Zealand
| | - Paul F. Davis
- From the Gillies McIndoe Research Institute, Wellington, New Zealand; Wellington Regional Plastic, Maxillofacial & Burns Unit, Hutt Hospital, Wellington, New Zealand; and University of Auckland, Auckland, New Zealand
| | - Swee T. Tan
- From the Gillies McIndoe Research Institute, Wellington, New Zealand; Wellington Regional Plastic, Maxillofacial & Burns Unit, Hutt Hospital, Wellington, New Zealand; and University of Auckland, Auckland, New Zealand
| | - Tinte Itinteang
- From the Gillies McIndoe Research Institute, Wellington, New Zealand; Wellington Regional Plastic, Maxillofacial & Burns Unit, Hutt Hospital, Wellington, New Zealand; and University of Auckland, Auckland, New Zealand
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Xu H, Bao K, Tang S, Ai J, Hu H, Zhang W. Cyanobacterial peptides as a prototype for the design of cathepsin D inhibitors. J Pept Sci 2017; 23:701-706. [PMID: 28585417 DOI: 10.1002/psc.3014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 03/25/2017] [Accepted: 05/03/2017] [Indexed: 11/12/2022]
Abstract
Cathepsin D (Cath D) is overexpressed and secreted in a number of solid tumors and involved in the progress of tumor invasion, proliferation, metastasis, and apoptosis. Inhibition of Cath D is regarded as an attractive pathway for the development of novel anticancer drugs. Our previous studies revealed that tasiamide B, a cyanobacterial peptide that contained a statine-like unit, exhibited good inhibition against Cath D and other aspartic proteases. Using this natural product as prototype, we designed and synthesized three new analogs, which bear isophthalic acid fragment at the N-terminus and isobutyl amine (1), cyclopropyl amine (2), or 3-methoxybenzyl amine (3) moiety at the C-terminus. Enzymatic assays revealed that all these three compounds showed moderate-to-good inhibition against Cath D, with IC50 s of 15, 884, and 353 nM, respectively. Notably, compound 1 showed extreme selectivity for Cath D with 576-fold over Cath E and 554-fold over BACE1, which could be a valuable template for the design of highly potent and selective Cath D inhibitors. Additionally, compound 1 showed moderated activity against HeLa cell lines with IC50 of 41.8 μM. Copyright © 2017 European Peptide Society and John Wiley & Sons, Ltd.
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Affiliation(s)
- Hao Xu
- Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, 316022, China
| | - Keting Bao
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Shuai Tang
- Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Jing Ai
- Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Haiyan Hu
- Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, 316022, China
| | - Wei Zhang
- School of Pharmacy, Fudan University, Shanghai, 201203, China
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Ngcungcu T, Oti M, Sitek JC, Haukanes BI, Linghu B, Bruccoleri R, Stokowy T, Oakeley EJ, Yang F, Zhu J, Sultan M, Schalkwijk J, van Vlijmen-Willems IMJJ, von der Lippe C, Brunner HG, Ersland KM, Grayson W, Buechmann-Moller S, Sundnes O, Nirmala N, Morgan TM, van Bokhoven H, Steen VM, Hull PR, Szustakowski J, Staedtler F, Zhou H, Fiskerstrand T, Ramsay M. Duplicated Enhancer Region Increases Expression of CTSB and Segregates with Keratolytic Winter Erythema in South African and Norwegian Families. Am J Hum Genet 2017; 100:737-750. [PMID: 28457472 DOI: 10.1016/j.ajhg.2017.03.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 03/27/2017] [Indexed: 12/30/2022] Open
Abstract
Keratolytic winter erythema (KWE) is a rare autosomal-dominant skin disorder characterized by recurrent episodes of palmoplantar erythema and epidermal peeling. KWE was previously mapped to 8p23.1-p22 (KWE critical region) in South African families. Using targeted resequencing of the KWE critical region in five South African families and SNP array and whole-genome sequencing in two Norwegian families, we identified two overlapping tandem duplications of 7.67 kb (South Africans) and 15.93 kb (Norwegians). The duplications segregated with the disease and were located upstream of CTSB, a gene encoding cathepsin B, a cysteine protease involved in keratinocyte homeostasis. Included in the 2.62 kb overlapping region of these duplications is an enhancer element that is active in epidermal keratinocytes. The activity of this enhancer correlated with CTSB expression in normal differentiating keratinocytes and other cell lines, but not with FDFT1 or NEIL2 expression. Gene expression (qPCR) analysis and immunohistochemistry of the palmar epidermis demonstrated significantly increased expression of CTSB, as well as stronger staining of cathepsin B in the stratum granulosum of affected individuals than in that of control individuals. Analysis of higher-order chromatin structure data and RNA polymerase II ChIA-PET data from MCF-7 cells did not suggest remote effects of the enhancer. In conclusion, KWE in South African and Norwegian families is caused by tandem duplications in a non-coding genomic region containing an active enhancer element for CTSB, resulting in upregulation of this gene in affected individuals.
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Affiliation(s)
- Thandiswa Ngcungcu
- Division of Human Genetics, School of Pathology and the Sydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa
| | - Martin Oti
- Department of Molecular Developmental Biology, Radboud Institute for Molecular Life Sciences, Radboud University, Nijmegen 6525 GA, the Netherlands; Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Jan C Sitek
- Department of Dermatology, Oslo University Hospital, Oslo 0424, Norway; Centre for Rare Disorders, Oslo University Hospital, Oslo 0424, Norway
| | - Bjørn I Haukanes
- Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen 5021, Norway
| | - Bolan Linghu
- Computational Biomedicine, WRD Genome Sciences & Technologies, Pfizer Worldwide R&D, Cambridge, MA 02139, USA
| | - Robert Bruccoleri
- Novartis Institutes for BioMedical Research, Cambridge, MA 02139, USA; Congenomics, Glastonbury, CT 06033, USA
| | - Tomasz Stokowy
- Department of Clinical Science, University of Bergen, Bergen 5020, Norway
| | - Edward J Oakeley
- Novartis Institutes for BioMedical Research, Basel 4056, Switzerland
| | - Fan Yang
- Novartis Institutes for BioMedical Research, Cambridge, MA 02139, USA
| | - Jiang Zhu
- Novartis Institutes for BioMedical Research, Cambridge, MA 02139, USA
| | - Marc Sultan
- Novartis Institutes for BioMedical Research, Basel 4056, Switzerland
| | - Joost Schalkwijk
- Department of Dermatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen 6525 GA, the Netherlands
| | - Ivonne M J J van Vlijmen-Willems
- Department of Dermatology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen 6525 GA, the Netherlands
| | | | - Han G Brunner
- Department of Human Genetics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen 6525 GA, the Netherlands; Maastricht UMC, Department of Clinical Genetics and School for Oncology and Developmental Biology (GROW), Maastricht 6202 AZ, the Netherlands
| | - Kari M Ersland
- Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen 5021, Norway; Department of Clinical Science, University of Bergen, Bergen 5020, Norway
| | - Wayne Grayson
- School of Pathology, Faculty of Health Sciences, University of the Witwatersrand and Ampath National Laboratories, Johannesburg 2193, South Africa
| | | | - Olav Sundnes
- Department of Dermatology, Oslo University Hospital, Oslo 0424, Norway; Laboratory for Immunohistochemistry and Immunopathology, Department of Pathology, Oslo University Hospital, Oslo 0424, Norway
| | - Nanguneri Nirmala
- Institute for Clinical Research and Policy Studies, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Thomas M Morgan
- Novartis Institutes for BioMedical Research, Cambridge, MA 02139, USA
| | - Hans van Bokhoven
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Nijmegen 6525 GA, the Netherlands
| | - Vidar M Steen
- Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen 5021, Norway; Department of Clinical Science, University of Bergen, Bergen 5020, Norway
| | - Peter R Hull
- Division of Clinical Dermatology and Cutaneous Science, Dalhousie University, Halifax, NS B3H 1V7, Canada
| | | | - Frank Staedtler
- Novartis Institutes for BioMedical Research, Basel 4056, Switzerland
| | - Huiqing Zhou
- Department of Molecular Developmental Biology, Radboud Institute for Molecular Life Sciences, Radboud University, Nijmegen 6525 GA, the Netherlands; Department of Human Genetics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen 6525 GA, the Netherlands
| | - Torunn Fiskerstrand
- Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen 5021, Norway; Department of Clinical Science, University of Bergen, Bergen 5020, Norway.
| | - Michele Ramsay
- Division of Human Genetics, School of Pathology and the Sydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa.
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Zheng Y, Chen H, Lai W, Xu Q, Liu C, Wu L, Maibach HI. Cathepsin D repairing role in photodamaged skin barrier. Skin Pharmacol Physiol 2014; 28:97-102. [PMID: 25402676 DOI: 10.1159/000363248] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 04/26/2014] [Indexed: 11/19/2022]
Abstract
UNLABELLED BACKGROUNDS/OBJECTIVES: Cathepsin D plays an important part in maintaining a normal skin barrier. Our previous study found that cathepsin D decreased in chronic photodamaged skin. This study investigated the cathepsin D content change in the stratum corneum (SC) and the repairing role of cathepsin D in chronic photodamaged skin barrier via the application of cathepsin D gel. METHODS Cathepsin D gel (0.001%) was applied to chronic photodamaged (sun-exposed forearm) human skin on identical sites (1 cm(2)/area) twice daily for 2 weeks. At 30 min and at 1, 3, 7, and 14 days, skin hydration and transepidermal water loss (TEWL) average values were detected via noninvasive skin detection equipment. Cathepsin D and transglutaminase (TGase)-1 in the skin sublayers were separated and detected via tape stripping, ELISA and Western blot. RESULTS After 2 weeks of cathepsin D gel application, the skin moisture value increased from 86.8 ± 1.2 to 95.2 ± 2.7 (p < 0.05), while TEWL decreased from 17.88 ± 1.87 to 11.58 ± 2.14 (p < 0.05). Cathepsin D protein was detected in the upper epidermis (12.6 ± 2.6 ng/cm(2)), mid-epidermis (8.4 ± 0.8 ng/cm(2)) and deep epidermis (16.2 ± 2.6 ng/cm(2)) in the cathepsin D gel group compared to the control group (2.2 ± 0.7, 3.0 ± 1.1 and 3.85 ± 1.4 ng/cm(2), respectively; p < 0.05). TGase-1 enzyme expression was upregulated 2.54 ± 0.19 times in the matrix gel-treated skin. CONCLUSIONS These data suggest that cathepsin D gel could increase the SC cathepsin D content and repair the epidermal barrier in chronic photodamaged skin. The mechanism might be related to increasing TGase-1 expression and activity.
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Affiliation(s)
- Yue Zheng
- Department of Dermato-Venereology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
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10
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Yogesh T, Narayan T, Shreedhar B, Shashidara R, Leekymohanty. The expression of E-cadherin and cathepsin-D in normal oral mucosa, oral epithelial dysplasia and oral squamous cell carcinoma: A comparative analysis between immunohistochemistry and routine histopathology. J Oral Maxillofac Pathol 2012; 15:288-94. [PMID: 22144831 PMCID: PMC3227255 DOI: 10.4103/0973-029x.86689] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background: E-cadherin is known to be an invasion suppressor gene and cathepsin-D, a protease, which is an invasion promoter and plays a central role in solid tumors including oral cancer. Aims: To look for the expression pattern in normal buccal mucosa, dysplastic oral epithelium and oral squamous cell carcinoma (SCC) along with their correlation to individual atypical features, thereby providing an objective to the grading system in predicting the fate of affected epithelium. Materials and Methods: To elucidate the expression patterns of these markers, we examined immunohistochemically on formalin fixed, paraffin embedded sections 22 dysplastic epithelia, eight SCC and ten normal buccal mucosa. Results: In dysplastic epithelium slight loss of expression of E-cadherin was noted as grade of dysplasia increased. Two cases of carcinoma clearance showed only basal and suprabasal staining. The staining varied in SCC with patchy to complete absence of expression. With cathepsin-D fine to moderate granular cytoplasmic staining was noted in most of the dysplastic epithelium. Similar staining was noted in SCC. The atypical features which strongly correlated to loss of expression of E-cadherin and intense cathepsin-D expression are basilar hyperplasia, loss of cohesion, mitosis, loss of polarity and drop shaped rete ridges. Conclusions: The result of the study shows that the above atypical features should be given more weightage in addition to traditional grading system, in predicting the fate of affected epithelium. Additional studies with larger sample size and using monoclonal antibody against cathepsin-D may further strengthen our findings.
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Affiliation(s)
- Tl Yogesh
- Department of Oral Pathology and Microbiology, Sri Rajiv Gandhi Dental College and Hospital, Cholanagar, Bangalore, India
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Saraswat-Ohri S, Vetvicka V. New insights into procathepsin D in pathological and physiological conditions. NORTH AMERICAN JOURNAL OF MEDICAL SCIENCES 2012; 3:222-6. [PMID: 22558598 PMCID: PMC3337741 DOI: 10.4297/najms.2011.3222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Procathepsin D is a major glycoprotein that is secreted from numerous types of cancer cells including breast, lung and prostrate carcinomas. It affects multiple stages of tumorigenesis that include proliferation, invasion, metastasis and apoptosis. Previous studies showed that the mitogenic effect of procathepsin D on cancer cells was mediated through its propeptide or activation peptide. Recent studies have also implicated the possible use of procathepsin D/activation peptide as a marker of cancer progression. Considering the broad range of functions of procathepsin D, the present review summarizes the three major potentials of procathepsin D-cancer progression, tumor marker and wound healing.
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Affiliation(s)
- Sujata Saraswat-Ohri
- Kentucky Spinal Cord Injury Centre, Department of Neurological Surgery, Louisville, KY 40202, USA
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Vetvicka V, Vashishta A, Saraswat-Ohri S, Vetvickova J. Procathepsin D and cancer: From molecular biology to clinical applications. World J Clin Oncol 2010; 1:35-40. [PMID: 21603309 PMCID: PMC3095452 DOI: 10.5306/wjco.v1.i1.35] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 08/24/2010] [Accepted: 09/01/2010] [Indexed: 02/06/2023] Open
Abstract
Procathepsin D (pCD) is overexpressed and secreted by cells of various tumor types including breast and lung carcinomas. pCD affects multiple features of tumor cells including proliferation, invasion, metastases and apoptosis. Several laboratories have previously shown that the mitogenic effect of pCD on cancer cells is mediated via its propeptide part (APpCD). However, the exact mechanism of how pCD affects cancer cells has not been identified. Recent observations have also revealed the possible use of pCD/APpcD as a marker of cancer progression. The purpose of this review is to summarize the three major potentials of pCD-tumor marker, potential drug, and screening agent.
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Affiliation(s)
- Vaclav Vetvicka
- Vaclav Vetvicka, Jana Vetvickova, Department of Pathology, University of Louisville, Louisville, KY 40202, United States
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Abstract
Proteases in the skin are essential to epidermal permeability barrier homeostasis. In addition to their direct proteolytic effects, certain proteases signal to cells by activating protease-activated receptors (PARs), the G-protein-coupled receptors. The expression of functional PAR-2 on human skin and its role in inflammation, pruritus, and skin barrier homeostasis have been demonstrated. Atopic dermatitis (AD) is a multifactorial inflammatory skin disease characterized by genetic barrier defects and allergic inflammation, which is sustained by gene-environmental interactions. Recent studies have revealed aberrant expression and activation of serine proteases and PAR-2 in the lesional skin of AD patients. The imbalance between proteases and protease inhibitors associated with genetic defects in the protease/protease inhibitor encoding genes, increase in skin surface pH, and exposure to proteolytically active allergens contribute to this aberrant protease/ PAR-2 signaling in AD. The increased protease activity in AD leads to abnormal desquamation, degradation of lipid-processing enzymes and antimicrobial peptides, and activation of primary cytokines, thereby leading to permeability barrier dysfunction, inflammation, and defects in the antimicrobial barrier. Moreover, up-regulated proteases stimulate PAR-2 in lesional skin of AD and lead to the production of cytokines and chemokines involved in inflammation and immune responses, itching sensation, and sustained epidermal barrier perturbation with easier allergen penetration. In addition, PAR-2 is an important sensor for exogenous danger molecules, such as exogenous proteases from various allergens, and plays an important role in AD pathogenesis. Together, these findings suggest that protease activity or PAR-2 may be a future target for therapeutic intervention for the treatment of AD.
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Affiliation(s)
- Sang Eun Lee
- Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea
- Human Barrier Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Se Kyoo Jeong
- Research Division, NeoPharm Co., Ltd., Daejeon, Korea
| | - Seung Hun Lee
- Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea
- Human Barrier Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Hibino T, Fujita E, Tsuji Y, Nakanishi J, Iwaki H, Katagiri C, Momoi T. Purification and characterization of active caspase-14 from human epidermis and development of the cleavage site-directed antibody. J Cell Biochem 2010; 109:487-97. [PMID: 19960512 DOI: 10.1002/jcb.22425] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Restricted expression of caspase-14 in differentiating keratinocytes suggests the involvement of caspase-14 in terminal differentiation. We purified active caspase-14 from human cornified cells with sequential chromatographic procedures. Specific activity increased 764-fold with a yield of 9.1%. Purified caspase-14 revealed the highest activity on WEHD-methylcoumaryl-amide (MCA), although YVAD-MCA, another caspase-1 substrate, was poorly hydrolyzed. The purified protein was a heterodimer with 17 and 11 kDa subunits. N-terminal and C-terminal analyses demonstrated that the large subunit consisted of Ser(6)-Asp(146) and N-terminal of small subunit was identified as Lys(153). We successfully developed an antiserum (anti-h14D146) directed against the Asp(146) cleavage site, which reacted only with active caspase-14 but not with procaspase-14. Furthermore we confirmed that anti-h14D146 did not show any reactivity to the active forms of other caspases. Immunohistochemical analysis demonstrated that anti-h14D146 staining was mostly restricted to the cornified layer and co-localized with some of the TUNEL positive-granular cells in the normal human epidermis. UV radiation study demonstrated that caspase-3 was activated and co-localized with TUNEL-positive cells in the middle layer of human epidermis. In contrast, we could not detect caspase-14 activation in response to UV. Our study revealed tightly regulated action of caspase-14, in which only the terminal differentiation of keratinocytes controls its activation process.
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Affiliation(s)
- Toshihiko Hibino
- Shiseido Life Science Research Center, 2-12-1 Fukuura, Kanazawa-ku, Yokohama 236-8643, Japan
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15
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Bragulla HH, Homberger DG. Structure and functions of keratin proteins in simple, stratified, keratinized and cornified epithelia. J Anat 2010; 214:516-59. [PMID: 19422428 DOI: 10.1111/j.1469-7580.2009.01066.x] [Citation(s) in RCA: 397] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Historically, the term 'keratin' stood for all of the proteins extracted from skin modifications, such as horns, claws and hooves. Subsequently, it was realized that this keratin is actually a mixture of keratins, keratin filament-associated proteins and other proteins, such as enzymes. Keratins were then defined as certain filament-forming proteins with specific physicochemical properties and extracted from the cornified layer of the epidermis, whereas those filament-forming proteins that were extracted from the living layers of the epidermis were grouped as 'prekeratins' or 'cytokeratins'. Currently, the term 'keratin' covers all intermediate filament-forming proteins with specific physicochemical properties and produced in any vertebrate epithelia. Similarly, the nomenclature of epithelia as cornified, keratinized or non-keratinized is based historically on the notion that only the epidermis of skin modifications such as horns, claws and hooves is cornified, that the non-modified epidermis is a keratinized stratified epithelium, and that all other stratified and non-stratified epithelia are non-keratinized epithelia. At this point in time, the concepts of keratins and of keratinized or cornified epithelia need clarification and revision concerning the structure and function of keratin and keratin filaments in various epithelia of different species, as well as of keratin genes and their modifications, in view of recent research, such as the sequencing of keratin proteins and their genes, cell culture, transfection of epithelial cells, immunohistochemistry and immunoblotting. Recently, new functions of keratins and keratin filaments in cell signaling and intracellular vesicle transport have been discovered. It is currently understood that all stratified epithelia are keratinized and that some of these keratinized stratified epithelia cornify by forming a Stratum corneum. The processes of keratinization and cornification in skin modifications are different especially with respect to the keratins that are produced. Future research in keratins will provide a better understanding of the processes of keratinization and cornification of stratified epithelia, including those of skin modifications, of the adaptability of epithelia in general, of skin diseases, and of the changes in structure and function of epithelia in the course of evolution. This review focuses on keratins and keratin filaments in mammalian tissue but keratins in the tissues of some other vertebrates are also considered.
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Affiliation(s)
- Hermann H Bragulla
- Department of Comparative Biomedical Sciences, Louisiana State University, Baton Rouge, 70803, USA.
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16
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Drapel V, Becue A, Champod C, Margot P. Identification of promising antigenic components in latent fingermark residues. Forensic Sci Int 2009; 184:47-53. [DOI: 10.1016/j.forsciint.2008.11.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2008] [Revised: 11/03/2008] [Accepted: 11/29/2008] [Indexed: 10/21/2022]
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Oyoshi MK, He R, Kumar L, Yoon J, Geha RS. Cellular and molecular mechanisms in atopic dermatitis. Adv Immunol 2009; 102:135-226. [PMID: 19477321 DOI: 10.1016/s0065-2776(09)01203-6] [Citation(s) in RCA: 179] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Atopic dermatitis (AD) is a pruritic inflammatory skin disease associated with a personal or family history of allergy. The prevalence of AD is on the rise and estimated at approximately 17% in the USA. The fundamental lesion in AD is a defective skin barrier that results in dry itchy skin, and is aggravated by mechanical injury inflicted by scratching. This allows entry of antigens via the skin and creates a milieu that shapes the immune response to these antigens. This review discusses recent advances in our understanding of the abnormal skin barrier in AD, namely abnormalities in epidermal structural proteins, such as filaggrin, mutated in approximately 15% of patients with AD, epidermal lipids, and epidermal proteases and protease inhibitors. The review also dissects, based on information from mouse models of AD, the contributions of the innate and adaptive immune system to the pathogenesis of AD, including the effect of mechanical skin injury on the polarization of skin dendritic cells, mediated by keratinocyte-derived cytokines such as thymic stromal lymphopoietin (TSLP), IL-6, and IL-1, that results in a Th2-dominated immune response with a Th17 component in acute AD skin lesions and the progressive conversion to a Th1-dominated response in chronic AD skin lesions. Finally, we discuss the mechanisms of susceptibility of AD skin lesions to microbial infections and the role of microbial products in exacerbating skin inflammation in AD. Based on this information, we discuss current and future therapy of this common disease.
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Affiliation(s)
- Michiko K Oyoshi
- Division of Immunology, Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
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Vashishta A, Ohri SS, Vetvickova J, Fusek M, Ulrichova J, Vetvicka V. Procathepsin D secreted by HaCaT keratinocyte cells - A novel regulator of keratinocyte growth. Eur J Cell Biol 2007; 86:303-13. [PMID: 17532541 PMCID: PMC2140195 DOI: 10.1016/j.ejcb.2007.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2006] [Revised: 03/26/2007] [Accepted: 03/27/2007] [Indexed: 01/03/2023] Open
Abstract
Procathepsin D (pCD), the precursor form of lysosomal aspartic protease, is overexpressed and secreted by various carcinomas. The fact that secreted pCD plays an essential role in progression of cancer has been established. In this study, we describe substantial secretion of pCD by the human keratinocyte cell line HaCaT, under serum-free conditions. Moreover, exogenous addition of purified pCD enhanced the proliferation of HaCaT cells. The proliferative effect of pCD was inhibited by a monoclonal antibody against the activation peptide (AP) of pCD. Treatment of HaCaT cells with pCD or AP led to the secretion of a set of cytokines that might promote the growth of cells in a paracrine manner. The role of secreted pCD and its mechanism of action were studied in a scratch wound model and the presence of pCD and AP enhanced regeneration, while this effect was reversed by the addition of anti-AP antibody. Expression and secretion of pCD was upregulated in HaCaT cells exposed to various stress conditions. Taken together, our results strongly suggest that the secretion of pCD is not only linked to cancer cells but also plays a role in normal physiological conditions like wound healing and tissue remodeling.
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Affiliation(s)
- Aruna Vashishta
- Department of Pathology, University of Louisville, 511 S. Floyd Street, MDR Bldg., Louisville, KY 40202, USA
| | - Sujata Saraswat Ohri
- Department of Pathology, University of Louisville, 511 S. Floyd Street, MDR Bldg., Louisville, KY 40202, USA
| | - Jana Vetvickova
- Department of Pathology, University of Louisville, 511 S. Floyd Street, MDR Bldg., Louisville, KY 40202, USA
| | - Martin Fusek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Science, Prague, Czech Republic
| | - Jitka Ulrichova
- Institute of Medical Chemistry and Biochemistry, Faculty of Medicine, Palacky University, Olomouc, Czech Republic
| | - Vaclav Vetvicka
- Department of Pathology, University of Louisville, 511 S. Floyd Street, MDR Bldg., Louisville, KY 40202, USA
- *Corresponding author: Tel: ++ 502 852 1612; Fax: ++ 502 852 1177; E-mail: (V. Vetvicka)
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Hachem JP, Houben E, Crumrine D, Man MQ, Schurer N, Roelandt T, Choi EH, Uchida Y, Brown BE, Feingold KR, Elias PM. Serine Protease Signaling of Epidermal Permeability Barrier Homeostasis. J Invest Dermatol 2006; 126:2074-86. [PMID: 16691196 DOI: 10.1038/sj.jid.5700351] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Evidence is growing that protease-activated receptor-2 (PAR-2) plays a key role in epithelial inflammation. We hypothesized here that PAR-2 plays a central role in epidermal permeability barrier homeostasis by mediating signaling from serine proteases (SP) in the stratum corneum (SC). Since the SC contains tryptic- and chymotryptic-like activity, we assessed the influence of SP activation/inhibition on barrier function. Acute barrier disruption increases SP activity and blockade by topical SP inhibitors (SPI) accelerates barrier recovery after acute abrogation. This improvement in barrier function is due to accelerated lamellar body (LB) secretion. Since tryptic SP signal certain downstream responses through PAR-2, we assessed its potential role in mediating the negative effects of SP on permeability barrier. Firstly, PAR-2 is expressed in the outer nucleated layers of the epidermis and most specifically under basal condition to the lipid raft (LR) domains. Secondly, tape stripping-induced barrier abrogation provokes PAR-2 activation, as shown by receptor internalization (i.e. receptor movement from LR to cytolpasmic domains). Thirdly, topical applications of PAR-2 agonist peptide, SLIGRL, delay permeability barrier recovery and inhibit LB secretion, while, conversely, PAR-2 knockout mice display accelerated barrier recovery kinetics and enhanced LB secretion, paralleled by increased LR formation and caveolin-1 expression. These results demonstrate first, the importance of SP/SPI balance for normal permeability barrier homeostasis, and second, they identify PAR-2 as a novel signaling mechanism of permeability barrier, that is, of response linked to LB secretion.
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Affiliation(s)
- Jean-Pierre Hachem
- Department of Dermatology and Medical Services (Metabolism), VA Medical Center, San Francisco, California, USA.
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Srivastava V, Saxena HO, Shanker K, Kumar JK, Luqman S, Gupta MM, Khanuja SPS, Negi AS. Synthesis of gallic acid based naphthophenone fatty acid amides as cathepsin D inhibitors. Bioorg Med Chem Lett 2006; 16:4603-8. [PMID: 16797987 DOI: 10.1016/j.bmcl.2006.06.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Revised: 05/23/2006] [Accepted: 06/05/2006] [Indexed: 02/08/2023]
Abstract
Gallic acid, one of the most abundant plant phenolic acids, has been modified to cathepsin D protease inhibitors. The strategy of modification was proposed basing on some previously reported structure and activity relationship (SAR) studies. The synthesized naphthophenone fatty acid amide derivatives have been evaluated for in vitro cathepsin D inhibition activity. Two of them have shown significant inhibition activity with IC(50) values of 0.06 and 0.14 microM, respectively, as compared against pepstatin (0.0023 microM), the most potent inhibitor known so far. The study revealed that such attempts on gallic acid based pharmacophores might result in potent inhibitors of cathepsin D.
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Affiliation(s)
- Vandana Srivastava
- Central Institute of Medicinal and Aromatic Plants, PO CIMAP, Lucknow, India
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21
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Méhul B, Bernard D, Brouard M, Delattre C, Schmidt R. Influence of calcium on the proteolytic degradation of the calmodulin-like skin protein (calmodulin-like protein 5) in psoriatic epidermis. Exp Dermatol 2006; 15:469-77. [PMID: 16689864 DOI: 10.1111/j.1600-0625.2006.00433.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The calmodulin-like skin protein (CLSP) or so-called calmodulin-like protein 5, a recently discovered skin-specific calcium-binding protein, is closely related to keratinocyte differentiation. The 16-kDa protein is proteolytically degraded in the upper layers of the stratum corneum (SC) of healthy skin. With the use of specific new monoclonal antibodies to CLSP, we were able to demonstrate that the abnormal elevated levels of CLSP, characteristic of psoriatic epidermis, were probably not due to an overexpression of the protein, but most likely the result of its non-degradation. Further in vitro experiments using recombinant CLSP and in situ data clearly showed that calcium protected and chelator accelerated CLSP degradation. These data indicate that CLSP degradation in the SC of psoriatic skin might be hindered by the abnormally elevated calcium concentration. No degradation of CLSP in psoriatic epidermis keeping its ability to bind protein as transglutaminase 3 may have a physiological role in skin diseases such as psoriasis.
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22
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Sarafian V, Jans R, Poumay Y. Expression of lysosome-associated membrane protein 1 (Lamp-1) and galectins in human keratinocytes is regulated by differentiation. Arch Dermatol Res 2006; 298:73-81. [PMID: 16710742 DOI: 10.1007/s00403-006-0662-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2005] [Revised: 02/27/2006] [Accepted: 03/20/2006] [Indexed: 10/24/2022]
Abstract
Lysosomes and their components are suspected to be involved in epidermal differentiation. In this study, lysosomal enzyme activities, expression of the lysosome-associated membrane protein 1 (Lamp-1) and expression of the epidermal galectins-1, -3 and -7 were investigated in human keratinocytes cultured at different cell densities (subconfluence, confluence and postconfluence) in order to induce differentiation. Detected by Western blot and immunofluorescence, Lamp-1 expression is transiently upregulated at culture confluence, but reduced at postconfluence. Northern blot analyses performed on subconfluent, confluent and post-confluent cultures of keratinocytes show that Lamp-1 mRNA expression is also upregulated at culture confluence, but downregulated at postconfluence. Measurements of lysosomal enzyme activities indicate a transient upregulation at culture confluence, whereas cathepsins B, C and L are particularly downregulated at postconfluence. Cell density and differentiation of epidermal cells also differentially regulates galectin expression in autocrine cultures. As the expression of galectin-1 mRNA is high in subconfluent cells, it is assumed to be associated with their proliferative state. On the other hand, as the mRNA levels for galectins-3 and -7 are notably upregulated at culture confluence (galectin-7) or at postconfluence (galectin-3), their expression is thought to be related to the differentiated state of keratinocytes. However, we collected evidence by confocal microscopy that galectin-3 and Lamp-1 do not colocalize in vitro in keratinocytes. Altogether, our results suggest that the upregulated Lamp-1 expression at confluence could be involved in keratinocyte differentiation, but apparently not through interaction with galectin-3.
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Affiliation(s)
- Victoria Sarafian
- Department of Histologie-Embryologie, Facultés Universitaires Notre-Dame de la Paix, 61, Rue de Bruxelles, 5000, Namur, Belgium
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23
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Rhiemeier V, Breitenbach U, Richter KH, Gebhardt C, Vogt I, Hartenstein B, Fürstenberger G, Mauch C, Hess J, Angel P. A novel aspartic proteinase-like gene expressed in stratified epithelia and squamous cell carcinoma of the skin. THE AMERICAN JOURNAL OF PATHOLOGY 2006; 168:1354-64. [PMID: 16565508 PMCID: PMC1606566 DOI: 10.2353/ajpath.2006.050871] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Homeostasis of stratified epithelia, such as the epidermis of the skin, is a sophisticated process that represents a tightly controlled balance between proliferation and differentiation. Alterations of this balance are associated with common human diseases including cancer. Here, we report the cloning of a novel cDNA sequence, from mouse back skin, that is induced by the phorbol ester 12-O-tetradecanoylphorbol-13-acetate (TPA) and codes for a hitherto unknown aspartic proteinase-like protein (Taps). Taps represents a potential AP-1 target gene because TPA-induced expression in epidermal keratinocytes critically depends on c-Fos, and co-treatment with dexamethasone, a potent inhibitor of AP-1-mediated gene regulation, resulted in impaired activation of Taps expression. Taps mRNA and protein are restricted to stratified epithelia in mouse embryos and adult tissues, implicating a crucial role for this aspartic proteinase-like gene in differentiation and homeostasis of multilayered epithelia. During chemically induced carcinogenesis, transient elevation of Taps mRNA and protein levels was detected in benign skin tumors. However, its expression is negatively associated with dedifferentiation and malignant progression in squamous cell carcinomas of the skin. Similar expression was observed in squamous skin tumors of patients, suggesting that detection of Taps levels represents a novel strategy to discriminate the progression state of squamous skin cancers.
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Affiliation(s)
- Verena Rhiemeier
- Division of Signal Transduction and Growth Control, German Cancer Research Center, Heidelberg, Germany
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Stefansson K, Brattsand M, Ny A, Glas B, Egelrud T. Kallikrein-related peptidase 14 may be a major contributor to trypsin-like proteolytic activity in human stratum corneum. Biol Chem 2006; 387:761-8. [PMID: 16800737 DOI: 10.1515/bc.2006.095] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We have previously presented evidence that two human kallikrein-related peptidases, KLK5 (hK5, stratum corneum tryptic enzyme, SCTE) and KLK7 (hK7, stratum corneum chymotryptic enzyme, SCCE), which are abundant in the stratum corneum, may be involved in desquamation. Since we had noted that not all trypsin-like activity in the plantar stratum corneum could be ascribed to KLK5, we set out to identify other skin proteases with similar primary substrate specificity. Here we describe purification of a protease identified as KLK14 from plantar stratum corneum, and show that this enzyme may be responsible for as much as 50% of the total trypsin-like activity in this tissue, measured as activity towards a chromogenic substrate cleaved by a wide variety of enzymes with trypsin-like specificity. This was in spite of very low levels of KLK14 protein compared to KLK5 and KLK7. KLK14 could be detected by immunoblotting in normal superficial stratum corneum of all individuals examined. The majority of KLK14 in the plantar stratum corneum is present in its catalytically active form. KLK14 could be immunohistochemically detected in sweat ducts, preferentially in the intraepidermal parts (the acrosyringium), and in sweat glands. The role played by this very efficient protease under normal and disease conditions in the skin remains to be elucidated.
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Affiliation(s)
- Kristina Stefansson
- Department of Public Health and Clinical Medicine, Dermatology and Venereology, Umeå University, S-901 85 Umeå, Sweden
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25
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Abstract
Most epidermal functions can be considered as protective, or more specifically, as defensive in nature. Yet, the term "barrier function" is often used synonymously with only one such defensive function, though arguably its most important, i.e., permeability barrier homeostasis. Regardless of their relative importance, these protective cutaneous functions largely reside in the stratum corneum (SC). In this review, I first explore the ways in which the multiple defensive functions of the SC are linked and interrelated, either by their shared localization or by common biochemical processes; how they are co-regulated in response to specific stressors; and how alterations in one defensive function impact other protective functions. Then, the structural and biochemical basis for these defensive functions is reviewed, including metabolic responses and signaling mechanisms of barrier homeostasis. Finally, the clinical consequences and therapeutic implications of this integrated perspective are provided.
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Affiliation(s)
- Peter M Elias
- Dermatology Service, Veterans Affairs Medical Center, University of California, San Francisco, California 94121, USA.
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26
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Bernard D, Méhul B, Thomas-Collignon A, Delattre C, Donovan M, Schmidt R. Identification and Characterization of a Novel Retroviral-Like Aspartic Protease Specifically Expressed in Human Epidermis. J Invest Dermatol 2005; 125:278-87. [PMID: 16098038 DOI: 10.1111/j.0022-202x.2005.23816.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Proteases play a pivotal role in epidermal differentiation and desquamation. Separation of a total protein extract from human reconstructed epidermis by two-dimensional gel electrophoresis and subsequent peptide analysis of a specific protein spot identified a new protein exhibiting similarities with the retroviral aspartic protease family. Cloning of the corresponding full-length cDNA revealed an open reading frame encoding for a new protease of 343 amino acids, containing a putative aspartic protease catalytic domain. We named this protein Skin ASpartic Protease (SASPase). RT-PCR and northern blot analysis of various human tissues revealed that SASPase was specifically expressed within the epidermis. Immunohistochemical analysis showed a particularly intense expression restricted to the granular layers, whereas in diseased skin, its expression was changed. Western blot analysis, using a monoclonal antibody, revealed the expression of two forms of the enzyme: a 28 kDa putative proform and the active 14 kDa form. Recombinant truncated SASPase (SASP28) was generated from a prokaryotic expression system in Escherichia coli as a fusion protein with GST. SASP28 degraded insulin and to a lesser extent casein with a pH optimum of 5. As seen for retroviral proteases, an auto-activation processing was evidenced, generating a 14 kDa protein (SASP14). Site-directed mutagenesis inhibited auto-activation of the enzyme. Indinavir, a potent HIV protease inhibitor used in AIDS therapy, had a significant inhibitory effect on rSASPase auto-activation, which could explain its side effects on skin.
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27
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Rawlings AV, Matts PJ. Stratum Corneum Moisturization at the Molecular Level: An Update in Relation to the Dry Skin Cycle. J Invest Dermatol 2005; 124:1099-110. [PMID: 15955083 DOI: 10.1111/j.1523-1747.2005.23726.x] [Citation(s) in RCA: 193] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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28
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Brattsand M, Stefansson K, Lundh C, Haasum Y, Egelrud T. A proteolytic cascade of kallikreins in the stratum corneum. J Invest Dermatol 2005; 124:198-203. [PMID: 15654974 DOI: 10.1111/j.0022-202x.2004.23547.x] [Citation(s) in RCA: 218] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Serine proteases belonging to the kallikrein group may play a central role in desquamation. We have identified human kallikreins 5, 7, and 14 (hK5, hK7, hK14) in catalytically active form in stratum corneum. All three enzymes are produced as inactive precursors. In this work, we prepared recombinant enzymes and enzyme precursors and characterized the catalytic properties of hK5 and hK14. With peptide substrates hK5 and hK14 both showed trypsin-like specificity and alkaline pH-optima. For the substrates tested, hK14 was superior to hK5 as regards maximum catalytic rate as well as catalytic efficiency. hK5, but not hK14, could activate pro-hK7 in a reaction which was optimal at pH 5-7. hK5 could activate its own precursor as well as pro-hK14. This was in contrast to hK14, which could activate pro-hK5 but not its own precursor. The activation of pro-hK5 either by auto-activation or by hK14 occurred at maximum rate at neutral or weakly alkaline pH, whereas activation of pro-hK14 by hK5 was optimal at pH 6-7. We conclude that the enzymes studied may be part of a protease cascade in the stratum corneum, and that the observed pH effects may have physiological relevance.
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Affiliation(s)
- Maria Brattsand
- Department of Public Health and Clinical Medicine, Dermatology and Venereology, Umeå University, Umeå, Sweden.
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Egberts F, Heinrich M, Jensen JM, Winoto-Morbach S, Pfeiffer S, Wickel M, Schunck M, Steude J, Saftig P, Proksch E, Schütze S. Cathepsin D is involved in the regulation of transglutaminase 1 and epidermal differentiation. J Cell Sci 2005; 117:2295-307. [PMID: 15126630 DOI: 10.1242/jcs.01075] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We previously demonstrated that the aspartate protease cathepsin D is activated by ceramide derived from acid sphingomyelinase. Increased expression of cathepsin D in the skin has been reported in wound healing, psoriasis and skin tumors. We explored specific functions of cathepsin D during epidermal differentiation. Protein expression and enzymatic activity of cathepsin D increased in differentiated keratinocytes in both stratified organotypic cultures and in mouse skin during epidermal barrier repair. Treatment of cultured keratinocytes with exogenous cathepsin D increased the activity of transglutaminase 1, known to cross-link the cornified envelope proteins involucrin and loricrin during epidermal differentiation. Inhibition of cathepsin D by pepstatin A suppressed the activity of transglutaminase 1. Cathepsin D-deficient mice revealed reduced transglutaminase 1 activity and reduced protein levels of the cornified envelope proteins involucrin and loricrin. Also, amount and distribution of cornified envelope proteins involucrin, loricrin, filaggrin, and of the keratins K1 and K5 were significantly altered in cathepsin D-deficient mice. Stratum corneum morphology in cathepsin D-deficient mice was impaired, with increased numbers of corneocyte layers and faint staining of the cornified envelope only, which is similar to the human skin disease lamellar ichthyosis. Our findings suggest a functional link between cathepsin D activation, transglutaminase 1 activity and protein expression of cornified envelope proteins during epidermal differentiation.
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Affiliation(s)
- Friederike Egberts
- Department of Dermatology, University Hospital of Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
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Horikoshi T, Matsumoto M, Usuki A, Igarashi S, Hikima R, Uchiwa H, Hayashi S, Brysk MM, Ichihashi M, Funasaka Y. Effects of glycolic acid on desquamation-regulating proteinases in human stratum corneum. Exp Dermatol 2005; 14:34-40. [PMID: 15660917 DOI: 10.1111/j.0906-6705.2005.00224.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In order to investigate the mechanism of glycolic acid (GA) function in human stratum corneum, we monitored changes in cathepsin D-like (CD) and chymotrypsin-like (SCCE) proteinases for 3 weeks following topical GA application (50% w/v, pH 0.9) for 30 min to human skin. In the early phase, weakened stratum corneum cohesion in the lower layers was observed on day 2 and the amount of active CD in the upper layer of the stratum corneum was significantly decreased from 30 min until day 2, whereas that in the lower layer remained normal. In contrast, the amount of active SCCE showed no change during the experimental period. The surface pH of the stratum corneum drastically decreased to pH 2 at 30 min and slightly recovered to around pH 3 until 1 day after treatment. From 9 to 19 days, a decrease in corneocyte cell area and a remarkable long-term increase in the amount of active CD in the upper layer were observed. In an in vitro study, the activities of desquamation-regulating proteinases were shown to have remarkably increased at around pH 3, due to activation of CD at its optimal pH. These results suggest that GA functions via at least two different mechanisms, acute activation of CD in the lower layer by acidification around pH 3, along with inactivation of CD in the upper layer, and long-term enhancement of de novo CD production in the few weeks following GA treatment.
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Affiliation(s)
- T Horikoshi
- Cosmetics Laboratory, Kanebo Ltd, 5-3-28, Kotobuki-cho, Odawara, Kanagawa, 250-0002, Japan.
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Igarashi S, Takizawa T, Takizawa T, Yasuda Y, Uchiwa H, Hayashi S, Brysk H, Robinson JM, Yamamoto K, Brysk MM, Horikoshi T. Cathepsin D, but not cathepsin E, degrades desmosomes during epidermal desquamation. Br J Dermatol 2004; 151:355-61. [PMID: 15327542 DOI: 10.1111/j.1365-2133.2004.06061.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND We previously reported that an ambient aspartic proteinase is crucial to desquamation of the stratum corneum at pH 5. Identification of this aspartic proteinase by using enzyme inhibitors suggested it to be cathepsin D, although we could not exclude cathepsin E. OBJECTIVES To determine the identity of this aspartic proteinase and its distribution within the stratum corneum. METHODS We measured enzyme activities of cathepsin D and cathepsin E in the salt and detergent extracts from callus stratum corneum, using a fluorogenic peptide as a substrate and comparing the effect of addition of Ascaris pepsin inhibitor (specific for cathepsin E) with that of pepstatin A (which inhibits both cathepsin D and cathepsin E). Both enzymes were then extracted and purified from plantar stratum corneum samples and identified by Western blotting. Immunofluorescence microscopy was used to investigate the localization of proteinases within human plantar stratum corneum sample sections. RESULTS We found that 20% of total aspartic proteinase activity could be attributed to cathepsin E, the remainder to cathepsin D. Two subunits of cathepsin D were identified, a mature active form at 33 kDa and an intermediate active form at 48 kDa; cathepsin E was also identified at 48 kDa, although in a stained band 10-fold weaker in the immunoblot. Immunofluorescence microscopy showed the antibody to cathepsin D to be localized in the lipid envelopes of the stratum corneum, whereas that to cathepsin E stained the tissue diffusely. The labelling for cathepsin D was similar to that observed for desmosomes, and immunoelectron microscopy confirmed that cathepsin D was present on desmosomes. On the other hand, cathepsin E occurred intracellularly within the squames. CONCLUSIONS We conclude that cathepsin D, and not cathepsin E, causes desquamation by degrading desmosomes.
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Affiliation(s)
- S Igarashi
- Cosmetics Laboratory, Kanebo Ltd, 5-3-28 Kotobuki-cho, Odawara, Kanagawa 250-0002, Japan
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Ishida-Yamamoto A, Simon M, Kishibe M, Miyauchi Y, Takahashi H, Yoshida S, O'Brien TJ, Serre G, Iizuka H. Epidermal lamellar granules transport different cargoes as distinct aggregates. J Invest Dermatol 2004; 122:1137-44. [PMID: 15140216 DOI: 10.1111/j.0022-202x.2004.22515.x] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Lamellar granules (LG) of the epidermis appear as discrete round or oblong shaped granules in classical transmission electron micrographs, but a recent cryo-transmission electron microscopy study has claimed that LG are in fact branched tubular structures. LG contain various cargoes including lipids, hydrolytic enzymes, and several other proteins. It is not known whether there are any differences in the timing of expression among them and whether they are sorted into the granules individually or collectively. In order to address these questions, we studied the expression of glucosylceramides (GlcCer), cathepsin D (CatD), corneodesmosin (Cdsn), kallikrein (KLK)7, and KLK8 in normal human epidermis using confocal laser scanning microscopy and immunoelectron microscopy. The results were consistent with the model that LG are parts of a branched tubular structure. In this structure, all the components were shown to be distributed as separate aggregates. In the trans-Golgi network (TGN), bulbous protrusions containing GlcCer, Cdsn, KLK7 and KLK8, and small CatD-positive vesicles were observed. The molecules were shown to be delivered to the apical region of granular keratinocytes. This study provides strong evidence for the sequential synthesis and independent trafficking of various LG cargoes, including for the first time CatD and KLK8, from TGN.
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Caubet C, Jonca N, Brattsand M, Guerrin M, Bernard D, Schmidt R, Egelrud T, Simon M, Serre G. Degradation of corneodesmosome proteins by two serine proteases of the kallikrein family, SCTE/KLK5/hK5 and SCCE/KLK7/hK7. J Invest Dermatol 2004; 122:1235-44. [PMID: 15140227 DOI: 10.1111/j.0022-202x.2004.22512.x] [Citation(s) in RCA: 346] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Corneodesmosin (CDSN), desmoglein 1 (DSG1), and desmocollin 1 (DSC1) are adhesive proteins of the extracellular part of the corneodesmosomes, the junctional structures that mediate corneocyte cohesion. The degradation of these proteins at the epidermis surface is necessary for desquamation. Two serine proteases of the kallikrein family synthesized as inactive precursors have been implicated in this process: the stratum corneum chymotryptic enzyme (SCCE/KLK7/hK7) and the stratum corneum tryptic enzyme (SCTE/KLK5/hK5). Here, we analyzed the capacity of these enzymes to cleave DSG1, DSC1, and epidermal or recombinant forms of CDSN, at an acidic pH close to that of the stratum corneum. SCCE directly cleaved CDSN and DSC1 but was unable to degrade DSG1. But incubation with SCTE induced degradation of the three corneodesmosomal components. Using the recombinant form of CDSN, either with its N-glycan chain or enzymatically deglycosylated, we also demonstrated that oligosaccharide residues do not protect CDSN against proteolysis by SCCE. Moreover, our results suggest that SCTE is able to activate the proform of SCCE. These results strongly suggest that the two kalikreins are involved in desquamation. A model is proposed for desquamation that could be regulated by a precisely controlled protease-protease inhibitor balance.
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Affiliation(s)
- Cécile Caubet
- UMR5165 "Epidermis Differentiation and Rheumatoid Autoimmunity", CNRS-P. Sabatier University (Institut Fédératif de Recherche 30 and INSERM-CNRS-Université P. Sabatier-Centre Hospitalier Universitaire), Toulouse, France
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Abstract
Our understanding of the formation, structure, composition, and maturation of the stratum corneum (SC) has progressed enormously over the past 30 years. Today, there is a growing realization that this structure, while faithfully providing a truly magnificent barrier to water loss, is a unique, intricate biosensor that responds to environmental challenges and surface trauma by initiating a series of biologic processes which rapidly seek to repair the damage and restore barrier homeostasis. The detailed ultrastructural, biochemical, and molecular dissection of the classic "bricks and mortar" model of the SC has provided insights into the basis of dry, scaly skin disorders that range from the cosmetic problems of winter xerosis to severe conditions such as psoriasis. With this knowledge comes the promise of increasingly functional topical therapies.
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Affiliation(s)
- Clive R Harding
- Unilever Research and Development, 45 River Road, Edgewater, NJ 07020, USA.
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Abstract
The primary function of the epidermis is to produce the protective, semi-permeable stratum corneum that permits terrestrial life. The barrier function of the stratum corneum is provided by patterned lipid lamellae localized to the extracellular spaces between corneocytes. Anucleate corneocytes contain keratin filaments bound to a peripheral cornified envelope composed of cross-linked proteins. The many layers of these specialized cells in the stratum corneum provide a tough and resilient framework for the intercellular lipid lamellae. The lamellae are derived from disk-like lipid membranes extruded from lamellar granules into the intercellular spaces of the upper granular layer. Lysosomal and other enzymes present in the extracellular compartment are responsible for the lipid remodeling required to generate the barrier lamellae as well as for the reactions that result in desquamation. Lamellar granules likely originate from the Golgi apparatus and are currently thought to be elements of the tubulo-vesicular trans-Golgi network. The regulation of barrier lipid synthesis has been studied in a variety of models, with induction of several enzymes demonstrated during fetal development and keratinocyte differentiation, but an understanding of this process at the molecular genetic level awaits further study. Certain genetic defects in lipid metabolism or in the protein components of the stratum corneum produce scaly or ichthyotic skin with abnormal barrier lipid structure and function. The inflammatory skin diseases psoriasis and atopic dermatitis also show decreased barrier function, but the underlying mechanisms remain under investigation. Topically applied "moisturizers" work by acting as humectants or by providing an artificial barrier to trans-epidermal water loss; current work has focused on developing a more physiologic mix of lipids for topical application to skin. Recent studies in genetically engineered mice have suggested an unexpected role for tight junctions in epidermal barrier function and further developments in this area are expected. Ultimately, more sophisticated understanding of epidermal barrier function will lead to more rational therapy of a host of skin conditions in which the barrier is impaired.
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Affiliation(s)
- Kathi C Madison
- Marshall Dermatology Research Laboratories, Department of Dermatology, University of Iowa, Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa, USA.
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Bernard D, Méhul B, Thomas-Collignon A, Simonetti L, Remy V, Bernard MA, Schmidt R. Analysis of proteins with caseinolytic activity in a human stratum corneum extract revealed a yet unidentified cysteine protease and identified the so-called "stratum corneum thiol protease" as cathepsin l2. J Invest Dermatol 2003; 120:592-600. [PMID: 12648222 DOI: 10.1046/j.1523-1747.2003.12086.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Desquamation is described as a protease-dependent phenomenon where serine proteases with a basic pH optimum play a key role. Recently proteases with an acidic pH optimum were identified in the stratumcorneum and associated with desquamation, e.g., cathepsin D and the stratum corneum thiol protease. The purpose of this study was to investigate if human stratum corneum contains proteases different from the above, exhibiting similar properties. After gel filtration, we identified four distinct proteolytic activities in a human stratum corneum extract, a cathepsin-E-like activity (80 kDa), a cathepsin-D activity (40 kDa), a yet unknown cathepsin-L-like form (28 kDa) exhibiting the highest caseinolytic activity, and a chymotrypsin-like protein (24 kDa) containing the acidic activity of the well described stratum corneum chymotryptic enzyme. We named the new 28 kDa protease stratum corneum cathepsin-L-like enzyme. Characterization of stratum corneum cathepsin-L-like enzyme provided clear evidence that this new protease, despite its membership to the cathepsin-L-like family, is distinct from cathepsin L and from the recently described stratum corneum thiol protease. Its ability to hydrolyze corneodesmosin, a marker of corneocyte cohesion, was in favor of a role of stratum corneum cathepsin-L-like enzyme in the desquamation process. A more detailed analysis did not allow us to identify stratum corneum cathepsin-L-like enzyme at the molecular level but revealed that stratum corneum thiol protease is identical with the recently described cathepsin L2 protease. Reverse transcription polymerase chain reaction studies and the use of a specific antibody revealed that, in contrast to earlier reports, expression of stratum corneum thiol protease in human epidermis is not related to keratinocyte differentiation. Our results indicate that the stratum corneum thiol protease is probably expressed as a pro-enzyme in the lower layers of the epidermis and in part activated by a yet unidentified mechanism in the upper layers during keratinocyte differentiation.
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Rawlings AV. Trends in stratum corneum research and the management of dry skin conditions. Int J Cosmet Sci 2003; 25:63-95. [DOI: 10.1046/j.1467-2494.2003.00174.x] [Citation(s) in RCA: 147] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Fluhr JW, Elias PM. Stratum corneum pH: Formation and Function of the ‘Acid Mantle’. ACTA ACUST UNITED AC 2002. [DOI: 10.1159/000066140] [Citation(s) in RCA: 134] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Benavides F, Starost MF, Flores M, Gimenez-Conti IB, Guénet JL, Conti CJ. Impaired hair follicle morphogenesis and cycling with abnormal epidermal differentiation in nackt mice, a cathepsin L-deficient mutation. THE AMERICAN JOURNAL OF PATHOLOGY 2002; 161:693-703. [PMID: 12163394 PMCID: PMC1850757 DOI: 10.1016/s0002-9440(10)64225-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We previously described an autosomal-recessive mutation named nackt (nkt) exhibiting partial alopecia associated with CD4(+) T-cell deficiency. Also, we recently reported that nkt (now Ctsl(nkt)) comprises a deletion in the cathepsin L (Ctsl) gene. Another recent study reported that Ctsl knockout mice have CD4(+) T-cell deficiency and periodic shedding of hair, which recapitulate the nkt mutation and the old furless (fs) mutation. The current study focuses on the dermatological aspects of the nkt mutation. Careful histological analysis of skin development of homozygous nkt mice revealed a delayed hair follicle morphogenesis and late onset of the first catagen stage. The skin of Ctsl(nkt)/Ctsl(nkt) mice showed mild epidermal hyperplasia and hyperkeratosis, severe hyperplasia of the sebaceous glands, and structural alterations of hair follicles. Epidermal differentiation seems to be affected in nkt skin, with overexpression of involucrin and profilaggrin/filaggrin along with focal areas of keratin 6 expression in the interfollicular epidermis. Severe epidermal hyperplasia, acanthosis, orthokeratosis, and hyperkeratosis were only observed in mice maintained in nonpathogen-free environments. The analysis of Rag2-/- Ctsl(nkt)/Ctsl(nkt) double-mutant mice indicates that the skin defect remains under the absence of T and B cells. This animal model provides in vivo evidence that cysteine protease cathepsin L plays a critical role in hair follicle morphogenesis and cycling, as well as epidermal differentiation.
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Affiliation(s)
- Fernando Benavides
- Science Park-Research Division, The University of Texas M. D. Anderson Cancer Center, Smithville, Texas 78957, USA.
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Urschitz J, Iobst S, Urban Z, Granda C, Souza KA, Lupp C, Schilling K, Scott I, Csiszar K, Boyd CD. A serial analysis of gene expression in sun-damaged human skin. J Invest Dermatol 2002; 119:3-13. [PMID: 12164917 DOI: 10.1046/j.1523-1747.2002.01829.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
To study the phenotypic changes in human skin associated with repeated sun exposure at the transcription level, we have undertaken a comparative serial analysis of gene expression of sun-damaged preauricular skin and sun-protected postauricular skin as well as sun-protected epidermis. Serial analyses of gene expression libraries, containing multiple mRNA-derived tag recombinants, were made to poly(A+)RNA isolated from human postauricular skin and preauricular skin, as well as epidermal nick biopsy samples. 5330 mRNA-derived cDNA tags from the postauricular serial analysis of gene expression library were sequenced and these tag sequences were compared to cDNA sequences identified from 5105 tags analyzed from a preauricular serial analysis of gene expression library. Of the total of 4742 different tags represented in both libraries we found 34 tags with at least a 4-fold difference of tag abundance between the libraries. Among the mRNAs with altered steady-state(1) levels in sun-damaged skin, we detected those encoding keratin 1, macrophage inhibitory factor, and calmodulin-like skin protein. In addition, a comparison of cDNA sequences identified in the serial analysis of gene expression libraries obtained from the epidermal biopsy samples (5257 cDNA tags) and from both full-thickness skin samples indicated that many genes with altered steady-state transcript levels upon sun exposure were expressed in epidermal keratinocytes. These results suggest a major role for the epidermis in the pathomechanism of largely dermal changes in chronically sun-exposed skin.
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Affiliation(s)
- Johann Urschitz
- The Pacific Biomedical Research Center, University of Hawaii, 1993 East-West Road, Honolulu, HI 96822, U.S.A
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Frohme M, Scharm B, Delius H, Knecht R, Hoheisel JD. Use of representational difference analysis and cDNA arrays for transcriptional profiling of tumor tissue. Ann N Y Acad Sci 2000; 910:85-104; discussion 104-5. [PMID: 10911908 DOI: 10.1111/j.1749-6632.2000.tb06703.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Representational difference analysis of cDNA (cDNA-RDA) was used for a comparison of the global transcript level of tumor of the larynx and the corresponding normal epithelial tissue toward the end of detecting differentially expressed genes. Overall, some 130 gene fragments were identified. By sequence analysis and homology comparison, they could be put into several groups related to (potential) functions. Apart from genes whose overexpression was most likely a result of tumor growth or dedifferentiation of epithelial tissue, a lot of genes were isolated that play major roles in signal transduction pathways or apoptosis or act as oncogenes or tumor suppressor genes, in addition to new, entirely unknown genes. Moreover, some cDNAs of known genes were identified that derived from unconventional splicing activity or other transcript modifications. All identified fragments were arrayed on solid support and used for reverse Northern blot analyses. The use of preselected RDA fragments as targets in array-based profiling experiments circumvents many of the problems encountered when dealing with large clone libraries.
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Affiliation(s)
- M Frohme
- Deutsches Krebsforschungszentrum, Heidelberg, Germany.
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Chen SH, Arany I, Apisarnthanarax N, Rajaraman S, Tyring SK, Horikoshi T, Brysk H, Brysk MM. Response of keratinocytes from normal and psoriatic epidermis to interferon-gamma differs in the expression of zinc-alpha(2)-glycoprotein and cathepsin D. FASEB J 2000; 14:565-71. [PMID: 10698972 DOI: 10.1096/fasebj.14.3.565] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Psoriasis is a T cell-mediated inflammatory disease characterized by hyperproliferation and by aberrant differentiation. We found cathepsin D and zinc-alpha(2)-glycoprotein, two catalytic enzymes associated with apoptosis and desquamation, to be present in the stratum corneum of the normal epidermis but absent from the psoriatic plaque. Psoriasis is characterized by an altered response to interferon-gamma (IFN-gamma), including the induction of apoptosis in normal but not in psoriatic keratinocytes, often with opposite effects on gene expression of suprabasal proteins. We found that IFN-gamma binding and signaling were attenuated in psoriasis: The IFN-gamma receptor, the signal transducer and activator of transcription STAT-1, and the interferon regulatory factor IRF-1 were strongly up-regulated by IFN-gamma in normal keratinocytes, but not in psoriatic ones. IFN-gamma strongly up-regulated the expression of the catalytic enzymes cathepsin D and zinc-alpha(2)-glycoprotein in normal keratinocytes but down-regulated them in psoriatic ones; the reverse was true of the apoptotic suppressor bcl-2. We believe that the aberrant response to IFN-gamma plays a central role in the pathophysiology of psoriasis, particularly the disruption of apoptosis and desquamation.
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Affiliation(s)
- S H Chen
- Department of Dermatology, University of Texas Medical Branch, Galveston, Texas 77555, USA
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Horikoshi T, Igarashi S, Uchiwa H, Brysk H, Brysk MM. Role of endogenous cathepsin D-like and chymotrypsin-like proteolysis in human epidermal desquamation. Br J Dermatol 1999; 141:453-9. [PMID: 10583048 DOI: 10.1046/j.1365-2133.1999.03038.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Even though the skin surface is acidic (about pH 5), most in vitro studies on desquamation have been performed at alkaline pH. We demonstrate that the standard in vitro model system, which achieves squame shedding upon incubation of plantar stratum corneum for 1 day in an alkaline buffer that must include a chelating agent, can be extended to a more realistic model in which the incubation is for 4 days, at varying pHs from 5 to 8, without exogenous chelators. Desmoglein I from stratum corneum was degraded by the squames shed at pH 5 as well as at pH 8. Squame shedding was inhibited to varying extents by the addition of proteinase inhibitors, whose specificity suggested that the crucial enzymatic activity at pH 8 was a chymotrypsin-like serine proteinase, while a similar activity at pH 5 was accompanied by an aspartic proteinase activity of comparable strength. Four degradation peaks were observed when the insulin B chain was reacted with shed squames at pH 5. Two of these peptides were suppressed by the addition of phenylmethylsulphonyl fluoride, the other two by pepstatin A; chymostatin inhibited all four, but E-64 and leupeptin showed no effect. The implied specificity was confirmed by reacting the insulin (without squames) with the standard enzymes human liver cathepsin D and pancreatic chymotrypsin, reproducing the expected degradation products. These results suggest that epidermal desquamation at acidic pH requires two proteolytic activities, one of which is an analogue of chymotrypsin and the other of cathepsin D. Endogenous proteinases corresponding to these activities have been previously identified, namely the stratum corneum chymotryptic enzyme and the mature active form of cathepsin D.
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Affiliation(s)
- T Horikoshi
- Basic Research Laboratory, Kanebo Ltd, 5-3-28, Kotobuki-cho, Odawara, Kanagawa 250-0002, Japan.
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