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Holst-Hansen T, Nielsen PY, Jensen MH, Mandrup-Poulsen T, Trusina A. Tipping-point transition from transient to persistent inflammation in pancreatic islets. NPJ Syst Biol Appl 2024; 10:102. [PMID: 39266581 PMCID: PMC11393080 DOI: 10.1038/s41540-024-00427-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 08/19/2024] [Indexed: 09/14/2024] Open
Abstract
Type 2 diabetes (T2D) is associated with a systemic increase in the pro-inflammatory cytokine IL-1β. While transient exposure to low IL-1β concentrations improves insulin secretion and β-cell proliferation in pancreatic islets, prolonged exposure leads to impaired insulin secretion and collective β-cell death. IL-1 is secreted locally by islet-resident macrophages and β-cells; however, it is unknown if and how the two opposing modes may emerge at single islet level. We investigated the duality of IL-1β with a quantitative in silico model of the IL-1 regulatory network in pancreatic islets. We find that the network can produce either transient or persistent IL-1 responses when induced by pro-inflammatory and metabolic cues. This suggests that the duality of IL-1 may be regulated at the single islet level. We use two core feedbacks in the IL-1 regulation to explain both modes: First, a fast positive feedback in which IL-1 induces its own production through the IL-1R/IKK/NF-κB pathway. Second, a slow negative feedback where NF-κB upregulates inhibitors acting at different levels along the IL-1R/IKK/NF-κB pathway-IL-1 receptor antagonist and A20, among others. A transient response ensues when the two feedbacks are balanced. When the positive feedback dominates over the negative, islets transit into the persistent inflammation mode. Consistent with several observations, where the size of islets was implicated in its inflammatory state, we find that large islets and islets with high density of IL-1β amplifying cells are more prone to transit into persistent IL-1β mode. Our results are likely not limited to IL-1β but are general for the combined effect of multiple pro-inflammatory cytokines and chemokines. Generalizing complex regulations in terms of two feedback mechanisms of opposing nature and acting on different time scales provides a number of testable predictions. Taking islet architecture and cellular heterogeneity into consideration, further dynamic monitoring and experimental validation in actual islet samples will be crucial to verify the model predictions and enhance its utility in clinical applications.
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Affiliation(s)
| | - Pernille Yde Nielsen
- Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Lyngby, Denmark
| | - Mogens H Jensen
- Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
| | - Thomas Mandrup-Poulsen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Ala Trusina
- Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
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2
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Nieradko-Iwanicka B, Przybylska D, Borzęcki A. Interleukin 1α and interleukin 18 in patients with vitiligo - Results of a case-control study. Biomed Pharmacother 2023; 160:114364. [PMID: 36739764 DOI: 10.1016/j.biopha.2023.114364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 01/31/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
INTRODUCTION Vitiligo is a depigmenting disorder resulting from loss of functional melanocytes in the skin. Variety of inflammatory mediators participate in the regulation of melanogenesis in melanocytes: interleukin-18 (IL-18), interleukin-33, granulocyte-macrophage colony stimulating factor, interferon-γ, prostaglandin E2 have the effect of promoting melanogenesis, while interleukin-1 (IL-1), interleukin-4, interleukin-6, interleukin-17 and tumor necrosis factor can inhibit melanogenesis. AIM Evaluation of IL-1α and IL-18 levels in peripheral blood in patients with vitiligo compared to healthy controls. MATERIALS AND METHODS Fifty patients aged 18-81 with vitiligo participated in the study. The control group consisted of 38 healthy people. Venous blood samples were obtained from each participant. Serum IL-1α and IL-18 concentrations were determined using the enzyme-linked immunoabsorbent assay (ELISA). RESULTS Among patients with vitiligo, the mean concentration of IL-1α was 0.13 (± 0.535) pg/mL, while in the control group it was 0.51 (± 1.51). There were no statistically significant differences in IL-1α concentrations between patients in the study group compared to the control group (p > 0.05). In the study group, the mean IL-18 concentration was 141.05 (± 136.33) pg/mL vs 137.33 (± 105.83) pg/mL in the controls. There were no statistically significant differences in IL-18 concentrations between patients in the study group compared to the controls (p > 0.05). In the Spearman correlation test, no correlation was confirmed between IL1α and IL-18 concentrations in the group of patients with vitiligo vs healthy people. CONCLUSIONS There is no correlation between Il-1 and Il-18 concentration in the blood sera of patients with vitiligo.
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Affiliation(s)
- Barbara Nieradko-Iwanicka
- Department of Hygiene and Epidemiology, Medical University of Lublin, Chodźki 7 Street, 20-093 Lublin, Poland.
| | - Daria Przybylska
- Department of Dermatology, Venerology and Pediatric Dermatology, Independent Public Healthcare Unit No.1 in Lublin, Staszica 16 Street, 20-081 Lublin, Poland.
| | - Andrzej Borzęcki
- Department of Hygiene and Epidemiology, Medical University of Lublin, Chodźki 7 Street, 20-093 Lublin, Poland
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3
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Cordier-Dirikoc S, Pedretti N, Garnier J, Clarhaut-Charreau S, Ryffel B, Morel F, Bernard FX, Hamon de Almeida V, Lecron JC, Jégou JF. Dermal fibroblasts are the key sensors of aseptic skin inflammation through interleukin 1 release by lesioned keratinocytes. Front Immunol 2022; 13:984045. [PMID: 36268013 PMCID: PMC9576869 DOI: 10.3389/fimmu.2022.984045] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 09/01/2022] [Indexed: 11/19/2022] Open
Abstract
IL-1 plays a crucial role in triggering sterile inflammation following tissue injury. Although most studies associate IL-1 release by injured cells to the recruitment of neutrophils for tissue repair, the inflammatory cascade involves several molecular and cellular actors whose role remains to be specified. In the present study, we identified dermal fibroblasts among the IL-1R1-expressing skin cells as key sensors of IL-1 released by injured keratinocytes. After in vitro stimulation by recombinant cytokines or protein extracts of lysed keratinocytes containing high concentrations of IL-1, we show that dermal fibroblasts are by far the most IL-1-responsive cells compared to keratinocytes, melanocytes and endothelial cells. Fibroblasts have the property to respond to very low concentrations of IL-1 (from 10 fg/ml), even in the presence of 100-fold higher concentrations of IL-1RA, by increasing their expression of chemokines such as IL-8 for neutrophil recruitment. The capacity of IL-1-stimulated fibroblasts to attract neutrophils has been demonstrated both in vitro using cell migration assay and in vivo using a model of superficial epidermal lesion in IL-1R1-deficient mice which harbored reduced expression of inflammatory mediators and neutrophil skin infiltration. Together, our results shed a light on dermal fibroblasts as key relay cells in the chain of sterile inflammation induced after epidermal lesion.
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Affiliation(s)
| | | | - Julien Garnier
- Qima-Bioalternatives (Qima Life Sciences), Gençay, France
| | - Sandrine Clarhaut-Charreau
- Qima-Bioalternatives (Qima Life Sciences), Gençay, France
- Université de Poitiers, Laboratoire Inflammation, Tissus Epithéliaux et Cytokines (LITEC), UR15560, Poitiers, France
| | | | - Franck Morel
- Université de Poitiers, Laboratoire Inflammation, Tissus Epithéliaux et Cytokines (LITEC), UR15560, Poitiers, France
| | | | | | - Jean-Claude Lecron
- Université de Poitiers, Laboratoire Inflammation, Tissus Epithéliaux et Cytokines (LITEC), UR15560, Poitiers, France
- Service d’Immunologie et Inflammation, CHU de Poitiers, Poitiers, France
| | - Jean-François Jégou
- Université de Poitiers, Laboratoire Inflammation, Tissus Epithéliaux et Cytokines (LITEC), UR15560, Poitiers, France
- *Correspondence: Jean-François Jégou,
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4
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Lin Y, Cao Z, Lyu T, Kong T, Zhang Q, Wu K, Wang Y, Zheng J. Single-cell RNA-seq of UVB-radiated skin reveals landscape of photoaging-related inflammation and protection by vitamin D. Gene 2022; 831:146563. [PMID: 35577040 DOI: 10.1016/j.gene.2022.146563] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 04/14/2022] [Accepted: 05/06/2022] [Indexed: 12/20/2022]
Abstract
Ultraviolet rays are a potential threat to nature. It can accelerate skin aging by causing skin damage, cell infiltration, and inflammation. The present study investigated UV-irradiated mouse skin through single-cell sequencing. We observed that UV-irradiated mouse skin mainly induced inflammation of fibroblasts and demonstrated differential gene expression. Cell prediction revealed the significance of macrophages in tissue repair. Furthermore, cell culture studies substantiated vitamin D-induced inhibitory effect on skin inflammation. These findings thus indicate some references for skin photo-protection.
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Affiliation(s)
- Yuanbin Lin
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), Ningbo 315300, PR China; School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR China
| | - Zhanglei Cao
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), Ningbo 315300, PR China
| | - Tianqi Lyu
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), Ningbo 315300, PR China
| | - Tong Kong
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), Ningbo 315300, PR China
| | - Qian Zhang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), Ningbo 315300, PR China
| | - Kerong Wu
- Translational Research Laboratory for Urology, Department of Urology, Ningbo First Hospital, Ningbo, Zhejiang 315000, PR China.
| | - Yuhui Wang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), Ningbo 315300, PR China.
| | - Jianping Zheng
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), Ningbo 315300, PR China.
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5
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Goenka S, Simon SR. Novel Chemically Modified Curcumin (CMC) Analogs Exhibit Anti-Melanogenic Activity in Primary Human Melanocytes. Int J Mol Sci 2021; 22:ijms22116043. [PMID: 34205035 PMCID: PMC8199869 DOI: 10.3390/ijms22116043] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 11/20/2022] Open
Abstract
Hyperpigmentation is a dermatological condition characterized by the overaccumulation and/or oversecretion of melanin pigment. The efficacy of curcumin as an anti-melanogenic therapeutic has been recognized, but the poor stability and solubility that have limited its use have inspired the synthesis of novel curcumin analogs. We have previously reported on comparisons of the anti-melanogenic activity of four novel chemically modified curcumin (CMC) analogs, CMC2.14, CMC2.5, CMC2.23 and CMC2.24, with that of parent curcumin (PC), using a B16F10 mouse melanoma cell model, and we have investigated mechanisms of inhibition. In the current study, we have extended our findings using normal human melanocytes from a darkly pigmented donor (HEMn-DP) and we have begun to study aspects of melanosome export to human keratinocytes. Our results showed that all the CMCs downregulated the protein levels of melanogenic paracrine mediators, endothelin-1 (ET-1) and adrenomedullin (ADM) in HaCaT cells and suppressed the phagocytosis of FluoSphere beads that are considered to be melanosome mimics. All the three CMCs were similarly potent (except CMC2.14, which was highly cytotoxic) in inhibiting melanin production; furthermore, they suppressed dendricity in HEMn-DP cells. CMC2.24 and CMC2.23 robustly suppressed cellular tyrosinase activity but did not alter tyrosinase protein levels, while CMC2.5 did not suppress tyrosinase activity but significantly downregulated tyrosinase protein levels, indicative of a distinctive mode of action for the two structurally related CMCs. Moreover, HEMn-DP cells treated with CMC2.24 or CMC2.23 partially recovered their suppressed tyrosinase activity after cessation of the treatment. All the three CMCs were nontoxic to human dermal fibroblasts while PC was highly cytotoxic. Our results provide a proof-of-principle for the novel use of the CMCs for skin depigmentation, since at low concentrations, ranging from 5 to 25 µM, the CMCs (CMC2.24, CMC2.23 and CMC2.5) were more potent anti-melanogenic agents than PC and tetrahydrocurcumin (THC), both of which were ineffective at melanogenesis at similar doses, as tested in HEMn-DP cells (with PC being highly toxic in dermal fibroblasts and keratinocytes). Further studies to evaluate the efficacy of CMCs in human skin tissue and in vivo studies are warranted.
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Affiliation(s)
- Shilpi Goenka
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY 11794-5281, USA;
- Correspondence:
| | - Sanford R. Simon
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY 11794-5281, USA;
- Department of Biochemistry and Cellular Biology, Stony Brook University, Stony Brook, NY 11794-5215, USA
- Department of Pathology, Stony Brook University, Stony Brook, NY 11794, USA
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6
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Hossain MR, Ansary TM, Komine M, Ohtsuki M. Diversified Stimuli-Induced Inflammatory Pathways Cause Skin Pigmentation. Int J Mol Sci 2021; 22:3970. [PMID: 33921371 PMCID: PMC8070342 DOI: 10.3390/ijms22083970] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/05/2021] [Accepted: 04/07/2021] [Indexed: 02/07/2023] Open
Abstract
The production of melanin pigments by melanocytes and their quantity, quality, and distribution play a decisive role in determining human skin, eye, and hair color, and protect the skin from adverse effects of ultraviolet radiation (UVR) and oxidative stress from various environmental pollutants. Melanocytes reside in the basal layer of the interfollicular epidermis and are compensated by melanocyte stem cells in the follicular bulge area. Various stimuli such as eczema, microbial infection, ultraviolet light exposure, mechanical injury, and aging provoke skin inflammation. These acute or chronic inflammatory responses cause inflammatory cytokine production from epidermal keratinocytes as well as dermal fibroblasts and other cells, which in turn stimulate melanocytes, often resulting in skin pigmentation. It is confirmed by some recent studies that several interleukins (ILs) and other inflammatory mediators modulate the proliferation and differentiation of human epidermal melanocytes and also promote or inhibit expression of melanogenesis-related gene expression directly or indirectly, thereby participating in regulation of skin pigmentation. Understanding of mechanisms of skin pigmentation due to inflammation helps to elucidate the relationship between inflammation and skin pigmentation regulation and can guide development of new therapeutic pathways for treating pigmented dermatosis. This review covers the mechanistic aspects of skin pigmentation caused by inflammation.
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Affiliation(s)
| | | | - Mayumi Komine
- Department of Dermatology, Faculty of Medicine, Jichi Medical University, Tochigi 329-0498, Japan; (M.R.H.); (T.M.A.); (M.O.)
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7
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Fitsiou E, Pulido T, Campisi J, Alimirah F, Demaria M. Cellular Senescence and the Senescence-Associated Secretory Phenotype as Drivers of Skin Photoaging. J Invest Dermatol 2020; 141:1119-1126. [PMID: 33349436 DOI: 10.1016/j.jid.2020.09.031] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/14/2020] [Accepted: 09/28/2020] [Indexed: 01/10/2023]
Abstract
Chronic exposure to UVR is known to disrupt tissue homeostasis, accelerate the onset of age-related phenotypes, and increase the risk for skin cancer-a phenomenon defined as photoaging. In this paper, we review the current knowledge on how UV exposure causes cells to prematurely enter cellular senescence. We describe the mechanisms contributing to the accumulation of senescent cells in the skin and how the persistence of cellular senescence can promote impaired regenerative capacity, chronic inflammation, and tumorigenesis associated with photoaging. We conclude by highlighting the potential of senolytic drugs in delaying the onset and progression of age-associated phenotypes in the skin.
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Affiliation(s)
- Eleni Fitsiou
- European Research Institute for the Biology of Ageing, University Medical Center Groningen, The Netherlands
| | - Tanya Pulido
- Buck Institute for Research on Aging, Novato, California, USA
| | - Judith Campisi
- Buck Institute for Research on Aging, Novato, California, USA; Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | | | - Marco Demaria
- European Research Institute for the Biology of Ageing, University Medical Center Groningen, The Netherlands.
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8
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Wang JY, Lu PH, Lin WW, Wei YH, Chiu LY, Chern SR, Hung CF, Wu NL. Galectin-3 regulates UVB-induced inflammation in skin. J Dermatol Sci 2020; 98:119-127. [PMID: 32312639 DOI: 10.1016/j.jdermsci.2020.03.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 03/04/2020] [Accepted: 03/26/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Galectin-3 is widely expressed in many immunocytes and epithelial cells including skin keratinocytes. Galectin-3 can regulate immunological or inflammatory processes and plays a proinflammatory role in some disease models. Galectin-3 has a role in disorders related to ultraviolet (UV) photodamage such as apoptosis, skin squamous cell carcinoma and basal cell carcinoma. However, the evidence of galectin-3 in UVB-induced skin inflammation is still limited and the underlying molecular mechanism remains elusive. OBJECTIVE We aimed to investigate the effects of galectin-3 in human epidermal keratinocytes and in mice after UVB irradiation. METHODS Primary human epidermal keratinocytes with galectin-3 knockdown were used as the in vitro model. ELISA, QPCR, and western blotting were applied to evaluate the released cytokine, mRNA and protein expression. Histologic analysis, measurement of erythema and transepidermal water loss (TEWL) were applied to evaluate UVB-induced skin damage in galectin-3 knockout mice. RESULTS In UVB-irradiated human keratinocytes, galectin-3 knockdown downregulated the UVB-induced ASC crosslinking, cleavage of caspase-1, and formation of active IL-1β. Galectin-3 knockdown also decreased UVB-induced production of reactive oxygen species, p38 phosphorylation, and COX2 expression in human keratinocytes. After four days of UVB irradiation, galectin-3 knockout mice showed reduced gross erythema, histologic features of tissue inflammation, quantified levels of erythema and TEWL compared to wild type mice. The skin tissue lysate also showed less expression of active IL-1β and COX2 in galectin-3 knockout mice. CONCLUSION Galectin-3 may play a positive regulatory role in UVB-induced skin inflammation.
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Affiliation(s)
- Jen-Yu Wang
- Department of Dermatology, MacKay Memorial Hospital, Taipei, Taiwan; Mackay Junior College of Medicine, Nursing, and Management, New Taipei City, Taiwan.
| | - Po-Hsuan Lu
- Department of Dermatology, MacKay Memorial Hospital, Taipei, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Wan-Wan Lin
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan.
| | - Yu-Hsuan Wei
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan.
| | - Ling-Ya Chiu
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan.
| | - Schu-Rern Chern
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan.
| | - Chi-Feng Hung
- School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan.
| | - Nan-Lin Wu
- Department of Dermatology, MacKay Memorial Hospital, Taipei, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Mackay Junior College of Medicine, Nursing, and Management, New Taipei City, Taiwan.
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9
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Gouravani M, Khalili N, Razi S, Keshavarz-Fathi M, Khalili N, Rezaei N. The NLRP3 inflammasome: a therapeutic target for inflammation-associated cancers. Expert Rev Clin Immunol 2020; 16:175-187. [PMID: 31928260 DOI: 10.1080/1744666x.2020.1713755] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Introduction: Inflammasomes are large multimeric intracellular complexes that are capable of maturation and secretion of pro-inflammatory cytokines, IL-1β and IL-18, in response to danger signal molecules. As a member of the inflammasome family, the NLRP3 inflammasome has recently been under intense investigation revealing its possible role in several human diseases especially cancers.Areas covered: In this review, we will discuss the biology and mechanism of NLRP3 inflammasome activation, its role in specific types of tumors and the novel therapeutic modalities targeting this complex.Expert opinion: The NLRP3 inflammasome and its components including the adapter apoptosis-associated speck-like (ASC) protein and caspase-1 impose different and sometimes contrasting effects in tumorigenesis depending on various contexts. Considering the novel role of this complex in the initiation and progression of neoplasia, the NLRP3 inflammasome and its pathways provide desirable therapeutic targets for prevention, treatment, and prognosis of certain types of cancer. To date, several agents have been introduced for this purpose, some of which have shown promising results in the clinic.
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Affiliation(s)
- Mahdi Gouravani
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nastaran Khalili
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Sepideh Razi
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Student Research Committee, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mahsa Keshavarz-Fathi
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Neda Khalili
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.,Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Sheffield, UK
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10
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Fu C, Chen J, Lu J, Yi L, Tong X, Kang L, Pei S, Ouyang Y, Jiang L, Ding Y, Zhao X, Li S, Yang Y, Huang J, Zeng Q. Roles of inflammation factors in melanogenesis (Review). Mol Med Rep 2020; 21:1421-1430. [PMID: 32016458 PMCID: PMC7002987 DOI: 10.3892/mmr.2020.10950] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 09/24/2019] [Indexed: 12/12/2022] Open
Abstract
The occurrence of hyperpigmentation or hypopigmentation after inflammation is a common condition in dermatology and cosmetology. Since the exact mechanism of its occurrence is not yet known, prevention and treatment are troublesome. Previous studies have confirmed that α-melanocyte-stimulating hormone, stem cell factor and other factors can promote melanogenesis-related gene expression through the activation of signaling pathways. Recent studies have revealed that a variety of inflammatory mediators can also participate in the regulation of melanogenesis in melanocytes. In this review, we summarized that interleukin-18, interleukin-33, granulocyte-macrophage colony stimulating factor, interferon-γ, prostaglandin E2 have the effect of promoting melanogenesis, while interleukin-1, interleukin-4, interleukin-6, interleukin-17 and tumor necrosis factor can inhibit melanogenesis. Further studies have found that these inflammatory factors may activate or inhibit melanogenesis-related signaling pathways (such as protein kinase A and mitogen activated protein kinase) by binding to corresponding receptors, thereby promoting or inhibiting the expression of melanogenesis-related genes and regulating skin pigmentation processes. This suggests that the development of drugs or treatment methods from the perspective of regulating inflammation can provide new ideas and new targets for the treatment of pigmented dermatosis. This review outlines the current understanding of the inflammation factors' roles in melanogenesis.
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Affiliation(s)
- Chuhan Fu
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Jing Chen
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Jianyun Lu
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Lu Yi
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Xiaoliang Tong
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Liyang Kang
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Shiyao Pei
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Yujie Ouyang
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Ling Jiang
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Yufang Ding
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Xiaojiao Zhao
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Si Li
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Yan Yang
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Jinhua Huang
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Qinghai Zeng
- Department of Dermatology, Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
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11
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Rodríguez-Luna A, Ávila-Román J, Oliveira H, Motilva V, Talero E. Fucoxanthin and Rosmarinic Acid Combination Has Anti-Inflammatory Effects through Regulation of NLRP3 Inflammasome in UVB-Exposed HaCaT Keratinocytes. Mar Drugs 2019; 17:E451. [PMID: 31374828 PMCID: PMC6722862 DOI: 10.3390/md17080451] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 07/29/2019] [Indexed: 01/23/2023] Open
Abstract
Excessive exposure to ultraviolet (UV) radiation is the main risk factor to develop skin pathologies or cancer because it encourages oxidative condition and skin inflammation. In this sense, strategies for its prevention are currently being evaluated. Natural products such as carotenoids or polyphenols, which are abundant in the marine environment, have been used in the prevention of oxidative stress due to their demonstrated antioxidant activities. Nevertheless, the anti-inflammatory activity and its implication in photo-prevention have not been extensively studied. Thus, we aimed to evaluate the combination of fucoxanthin (FX) and rosmarinic acid (RA) on cell viability, apoptosis induction, inflammasome regulation, and anti-oxidative response activation in UVB-irradiated HaCaT keratinocytes. We demonstrated for the first time that the combination of FX and RA (5 µM RA plus 5 μM FX, designated as M2) improved antioxidant and anti-inflammatory profiles in comparison to compounds assayed individually, by reducing UVB-induced apoptosis and the consequent ROS production. Furthermore, the M2 combination modulated the inflammatory response through down-regulation of inflammasome components such as NLRP3, ASC, and Caspase-1, and the interleukin (IL)-1β production. In addition, Nrf2 and HO-1 antioxidant genes expression increased in UVB-exposed HaCaT cells pre-treated with M2. These results suggest that this combination of natural products exerts photo-protective effects by down-regulating NRLP3-inflammasome and increasing Nrf2 signalling pathway.
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Affiliation(s)
- Azahara Rodríguez-Luna
- Department of Pharmacology, Faculty of Pharmacy, Universidad de Sevilla, 41012 Seville, Spain
| | - Javier Ávila-Román
- Department of Pharmacology, Faculty of Pharmacy, Universidad de Sevilla, 41012 Seville, Spain.
| | - Helena Oliveira
- Department of Biology, Faculty of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Virginia Motilva
- Department of Pharmacology, Faculty of Pharmacy, Universidad de Sevilla, 41012 Seville, Spain
| | - Elena Talero
- Department of Pharmacology, Faculty of Pharmacy, Universidad de Sevilla, 41012 Seville, Spain
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Groten K, Marini A, Grether-Beck S, Jaenicke T, Ibbotson SH, Moseley H, Ferguson J, Krutmann J. Tomato Phytonutrients Balance UV Response: Results from a Double-Blind, Randomized, Placebo-Controlled Study. Skin Pharmacol Physiol 2019; 32:101-108. [PMID: 30836363 DOI: 10.1159/000497104] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 01/18/2019] [Indexed: 01/22/2023]
Abstract
BACKGROUND Our previous double-blinded, placebo-controlled cross-over study indicated that a nutritional supplement named lycopene-rich tomato nutrient complex (TNC) can protect from UVA1-induced (340-400 nm) and UVA- (320-400 nm)/UVB-induced (280-320 nm) upregulation of molecular markers associated with oxidative stress, inflammation, and ageing. OBJECTIVES in the current double-blind, randomized, placebo-controlled multicenter study, we analyze whether a similar, synergistic carotenoid-rich TNC can protect from broadband UVB-induced threshold erythema formation assessed as increase in minimal erythemal dose (MED) reading, the intensity of erythema formation, and the upregulation of molecular markers associated with inflammation and immunosuppression, and whether this correlates with carotenoid blood levels. METHODS One hundred and forty-nine healthy volunteers were randomized to two groups and subjected to a 5-week washout phase, followed by a 12-week treatment phase receiving either 15 mg lycopene, 5.8 mg phytoene and phytofluene, 0.8 mg β-carotene, 5.6 mg tocopherols from tomato extract, and 4 mg carnosic acid from rosemary extract per day or placebo made from medium-chain triglycerides. At the end of each phase, MED determination, UVB irradiation, chromametry, biopsies, and blood samples were undertaken. RESULTS The active supplement was well tolerated. Interestingly, no significant difference was seen in the MED between the active-supplement and placebo groups, as determined by visual grading by expert assessors. Of note, the carotenoid-containing supplement significantly protected against UVB-induced erythema formation measured as Δa* after the intervention minus Δa* after the washout phase as compared to the placebo. Moreover, intake of the active supplement significantly protected against UVB-induced upregulation of IL6 and TNFα as compared with the intake of placebo. Lastly, carotenoid plasma levels were significantly increased. CONCLUSION This well-tolerated carotenoid-containing supplement significantly protected against UVB-induced erythema formation and upregulation of proinflammatory cytokines in healthy volunteers.
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Affiliation(s)
- Katharina Groten
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Alessandra Marini
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Susanne Grether-Beck
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Thomas Jaenicke
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Sally H Ibbotson
- Department of Dermatology, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Harry Moseley
- Department of Dermatology, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - James Ferguson
- Department of Dermatology, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Jean Krutmann
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany, .,Medical Faculty, Heinrich Heine University, Düsseldorf, Germany,
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The Essential Role of Ca 2+ Signals in UVB-Induced IL-1β Secretion in Keratinocytes. J Invest Dermatol 2018; 139:1362-1372. [PMID: 30578820 DOI: 10.1016/j.jid.2018.12.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 12/03/2018] [Accepted: 12/05/2018] [Indexed: 12/24/2022]
Abstract
UVB-induced skin damage is attributable to reactive oxygen species, which are triggered by intracellular Ca2+ signals. However, exactly how the reactive oxygen species are triggered by intracellular Ca2+ upon UVB irradiation remains obscure. Here, we show that UVB induces Ca2+ signals via sequential generation of the following Ca2+ messengers: inositol 1,4,5-trisphosphate, nicotinic acid adenine dinucleotide phosphate, and cyclic ADP-ribose. UVB induced H2O2 production through NADPH oxidase 4 activation, which is downstream to inositol 1,4,5-trisphosphate and nicotinic acid adenine dinucleotide phosphate. H2O2 derived from NADPH oxidase 4 activated CD38 to produce cyclic ADP-ribose. UVB first evoked the pannexin channel to release ATP, which acts on P2X7 receptor to generate inositol 1,4,5-trisphosphate. Inhibitors of these messengers, as well as antioxidants, blocked UVB-induced Ca2+ signals and IL-1β secretion in keratinocytes. Furthermore, ablation of CD38 and NADPH oxidase 4 protected against UVB-induced inflammation and IL-1β secretion in the murine epidermis. These results show that UVB induces IL-1β secretion through cross-talk between Ca2+ and reactive oxygen species, providing insight towards potential targets against UVB-induced inflammation.
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Tryptophan Photoproduct FICZ Upregulates IL1A, IL1B, and IL6 Expression via Oxidative Stress in Keratinocytes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:9298052. [PMID: 30595799 PMCID: PMC6286782 DOI: 10.1155/2018/9298052] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 10/18/2018] [Accepted: 10/23/2018] [Indexed: 01/08/2023]
Abstract
Ultraviolet B (UVB) irradiation activates the aryl hydrocarbon receptor (AHR), generates the reactive oxygen species (ROS), and induces the production of proinflammatory cytokines such as IL1A, IL1B, and IL6. 6-Formylindolo[3,2-b]carbazole (FICZ) is a tryptophan-derived photoproduct that is induced by UVB irradiation and activates the AHR. However, its role in upregulating proinflammatory cytokine expression has never been investigated. Here, we demonstrated that FICZ enhanced ROS generation in human HaCaT keratinocytes in an AHR-dependent manner. FICZ also upregulated the expression of IL1A and IL1B, as well as the expression of IL6 and the production of its protein product, in an AHR- and ROS-dependent fashion. Here, we demonstrate that the actions of FICZ can substitute for the hazardous effects of UVB exposure, contributing to the further understandings of the mechanisms which UVB harms organisms.
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Bou-Dargham MJ, Khamis ZI, Cognetta AB, Sang QXA. The Role of Interleukin-1 in Inflammatory and Malignant Human Skin Diseases and the Rationale for Targeting Interleukin-1 Alpha. Med Res Rev 2016; 37:180-216. [PMID: 27604144 DOI: 10.1002/med.21406] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 07/19/2016] [Accepted: 07/23/2016] [Indexed: 12/11/2022]
Abstract
Inflammation plays a major role in the induction and progression of several skin diseases. Overexpression of the major epidermal proinflammatory cytokines interleukin (IL) 1 alpha (IL-1α) and 1 beta (IL-1β) is positively correlated with symptom exacerbation and disease progression in psoriasis, atopic dermatitis, neutrophilic dermatoses, skin phototoxicity, and skin cancer. IL-1β and the interleukin-1 receptor I (IL-1RI) have been used as a therapeutic target for some autoinflammatory skin diseases; yet, their system-wide effects limit their clinical usage. Based on the local effects of extracellular IL-1α and its precursor, pro-IL-1α, we hypothesize that this isoform is a promising drug target for the treatment and prevention of many skin diseases. This review provides an overview on IL-1α and IL-β functions, and their contribution to inflammatory and malignant skin diseases. We also discuss the current treatment regimens, and ongoing clinical trials, demonstrating the potential of targeting IL-1α, and not IL-1β, as a more effective strategy to prevent or treat the onset and progression of various skin diseases.
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Affiliation(s)
- Mayassa J Bou-Dargham
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306.,Institute of Molecular Biophysics, Florida State University, Tallahassee, FL, 32306
| | - Zahraa I Khamis
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306.,Institute of Molecular Biophysics, Florida State University, Tallahassee, FL, 32306.,Department of Chemistry and Biochemistry, Lebanese University, Faculty of Sciences, Hadath-Beirut, Lebanon
| | - Armand B Cognetta
- Dermatology Associates of Tallahassee and Division of Dermatology, Florida State University College of Medicine, Tallahassee, FL, 32308
| | - Qing-Xiang Amy Sang
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306.,Institute of Molecular Biophysics, Florida State University, Tallahassee, FL, 32306
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16
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Landeck L, Jakasa I, Dapic I, Lutter R, Thyssen JP, Skov L, Braun A, Schön MP, John SM, Kezic S, Brans R. The effect of epidermal levels of urocanic acid on 25-hydroxyvitamin D synthesis and inflammatory mediators upon narrowband UVB irradiation. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2016; 32:214-23. [DOI: 10.1111/phpp.12249] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/20/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Lilla Landeck
- Department of Dermatology, Environmental Medicine and Health Theory; University of Osnabrück; Osnabrück Germany
- Department of Dermatology; Ernst von Bergmann General Hospital; Teaching Hospital Charité University Medicine Berlin; Potsdam Germany
| | - Ivone Jakasa
- Laboratory for Analytical Chemistry; Department of Chemistry and Biochemistry; Faculty of Food Technology and Biotechnology; University of Zagreb; Zagreb Croatia
| | - Irena Dapic
- Laboratory for Analytical Chemistry; Department of Chemistry and Biochemistry; Faculty of Food Technology and Biotechnology; University of Zagreb; Zagreb Croatia
| | - René Lutter
- Departments of Respiratory Medicine and Experimental Immunology; Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands
| | - Jacob P. Thyssen
- Department of Dermato-Allergology; Gentofte Hospital; University of Copenhagen; Hellerup Denmark
| | - Lone Skov
- Department of Dermato-Allergology; Gentofte Hospital; University of Copenhagen; Hellerup Denmark
| | - Andrea Braun
- Department of Dermatology, Venereology, and Allergology; University Medical Center Göttingen; Georg August University; Göttingen Germany
- Lower Saxony Institute of Occupational Dermatology; University of Osnabrück and University Medical Center Göttingen; Osnabrück/Göttingen Germany
| | - Michael P. Schön
- Department of Dermatology, Venereology, and Allergology; University Medical Center Göttingen; Georg August University; Göttingen Germany
- Lower Saxony Institute of Occupational Dermatology; University of Osnabrück and University Medical Center Göttingen; Osnabrück/Göttingen Germany
| | - Swen M. John
- Department of Dermatology, Environmental Medicine and Health Theory; University of Osnabrück; Osnabrück Germany
- Lower Saxony Institute of Occupational Dermatology; University of Osnabrück and University Medical Center Göttingen; Osnabrück/Göttingen Germany
| | - Sanja Kezic
- Coronel Institute for Occupational Health; Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands
| | - Richard Brans
- Department of Dermatology, Environmental Medicine and Health Theory; University of Osnabrück; Osnabrück Germany
- Lower Saxony Institute of Occupational Dermatology; University of Osnabrück and University Medical Center Göttingen; Osnabrück/Göttingen Germany
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Byun JW, Park IS, Choi GS, Shin J. Role of fibroblast-derived factors in the pathogenesis of melasma. Clin Exp Dermatol 2016; 41:601-9. [DOI: 10.1111/ced.12874] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2015] [Indexed: 11/30/2022]
Affiliation(s)
- J. W. Byun
- Department of Dermatology; Inha Hospital; INHA University School of Medicine; Incheon Korea
| | - I. S. Park
- Department of Pathology; INHA University School of Medicine; Incheon Korea
| | - G. S. Choi
- Department of Dermatology; Inha Hospital; INHA University School of Medicine; Incheon Korea
| | - J. Shin
- Department of Dermatology; Inha Hospital; INHA University School of Medicine; Incheon Korea
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18
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Abstract
The rise in solar ultraviolet radiation on the earth's surface has led to a depletion of stratospheric ozone over recent decades, thus accelerating the need to protect human skin against the harmful effects of UV radiation such as erythema, edema, hyperpigmentation, photoaging, and skin cancer. There are many different ways to protect skin against UV radiation's harmful effects. The most popular way to reduce the amount of UV radiation penetrating the skin is topical application of sunscreen products that contain UV absorbing or reflecting active molecules. Based on their protection mechanism, the active molecules in sunscreens are broadly divided into inorganic and organic agents. Inorganic sunscreens reflect and scatter UV and visible radiation, while organic sunscreens absorb UV radiation and then re-emit energy as heat or light. These synthetic molecules have limited concentration according to regulation concern. Several natural compounds with UV absorption property have been used to substitute for or to reduce the quantity of synthetic sunscreen agents. In addition to UV absorption property, most natural compounds were found to act as antioxidants, anti-inflammatory, and immunomodulatory agents, which provide further protection against the damaging effects of UV radiation exposure. Compounds derived from natural sources have gained considerable attention for use in sunscreen products and have bolstered the market trend toward natural cosmetics. This adds to the importance of there being a wide selection of active molecules in sunscreen formulations. This paper summarizes a number of natural products derived from propolis, plants, algae, and lichens that have shown potential photoprotection properties against UV radiation exposure-induced skin damage.
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Affiliation(s)
- Nisakorn Saewan
- School of Cosmetic Science, Mae Fah Luang University, Muang, Chiangrai, Thailand
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19
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Aoki R, Aoki-Yoshida A, Suzuki C, Takayama Y. Protective effect of indole-3-pyruvate against ultraviolet b-induced damage to cultured HaCaT keratinocytes and the skin of hairless mice. PLoS One 2014; 9:e96804. [PMID: 24810606 PMCID: PMC4014565 DOI: 10.1371/journal.pone.0096804] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 04/11/2014] [Indexed: 12/24/2022] Open
Abstract
Previous investigations demonstrated that pyruvate protects human keratinocytes against cell damage stemming from exposure to ultraviolet B (UVB) radiation. This study endeavoured to elucidate the protective capacity of aromatic pyruvates (e.g., phenylpyruvate (PPyr), 4-hydroxyphenylpyruvate (HPPyr), and indole-3-pyruvate (IPyr)) against UVB-induced injury to skin cells, both in vitro and in vivo. Cultured human HaCaT keratinocytes were irradiated with UVB light (60 mJ/cm2) and maintained with or without test compounds (1–25 mM). In addition, the dorsal skin of hairless mice (HR-1) was treated with test compounds (100 µmol) and exposed to UVB light (1 J/cm2) for two times. The ability of the test compounds to ameliorate UVB-induced cytotoxicity and inflammation was then assessed. Aromatic pyruvates reduced cytotoxicity in UVB-irradiated HaCaT keratinocytes, and also diminished the expression of interleukin 1β (IL-1β) and interleukin 6 (IL-6). IPyr was more efficacious than either PPyr or HPPyr. Furthermore, only IPyr inhibited cyclooxygenase-2 (Cox-2) expression at both the mRNA and the protein level in UVB-treated keratinocytes. Topical application of IPyr to the dorsal skin of hairless mice reduced the severity of UVB-induced skin lesions, the augmentation of dermal thickness, and transepithelial water loss. Overproduction of IL-1β and IL-6 in response to UVB radiation was also suppressed in vivo by the topical administration of IPyr. These data strongly suggest that IPyr might find utility as a UVB-blocking reagent in therapeutic strategies to lessen UVB-induced inflammatory skin damage.
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Affiliation(s)
- Reiji Aoki
- Functional Biomolecules Research Group, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
| | - Ayako Aoki-Yoshida
- Functional Biomolecules Research Group, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Chise Suzuki
- Functional Biomolecules Research Group, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
| | - Yoshiharu Takayama
- Functional Biomolecules Research Group, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
- * E-mail:
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Tamilselvi E, Haripriya D, Hemamalini M, Pushpa G, Swapna S. Association of disease severity with IL-1 levels in methotrexate-treated psoriasis patients. Scand J Immunol 2014; 78:545-53. [PMID: 24283773 DOI: 10.1111/sji.12117] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Accepted: 09/05/2013] [Indexed: 01/14/2023]
Abstract
Interleukin-1 plays a key role in inflammation and keratinocyte activation. It is an important mediator in the initiation and maintenance of psoriatic plaques and may represent an attractive therapeutic target. The aim of this study is to evaluate the effect of Methotrexate (MTX) on IL-1 α and IL-1 β levels in both plasma and skin biopsy of patients with psoriasis and to investigate their association with clinical disease activity. Forty-five control subjects and 58 patients with psoriasis were recruited for this study. The patients were treated with 7.5 mg of MTX per week for 12 weeks. Folic acid was given at 5 mg once daily except on the day of MTX for 12 weeks. Blood samples and lesional skin biopsy were taken. Disease severity was assessed by Psoriasis Area Severity Index (PASI) score. IL-1 levels in plasma and skin biopsy were analysed using ELISA. PASI score declined significantly (P < 0.001) from day 0 to 12 weeks of MTX treatment. IL-1 α level in plasma and skin biopsy was reduced at day 0 sample and elevated significantly (P < 0.001) after MTX treatment. IL-1β level in plasma and skin biopsy was higher at day 0 sample and reduced significantly (P < 0.001) after MTX treatment. IL-1α levels and PASI score showed inverse correlation score before and after treatment with MTX. Whereas IL-1β levels showed positive correlation before and after treatment with MTX. Decreasing IL-1β levels by MTXs in psoriasis may block the Th17 differentiation. This shows the therapeutic effect of MTX in controlling the immunopathogenesis of psoriasis.
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Affiliation(s)
- E Tamilselvi
- Department of Medical Research, SRM Medical College, Hospital and Research Centre, Kattankulathur, Tamil Nadu, India
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Qin Z, Okubo T, Voorhees JJ, Fisher GJ, Quan T. Elevated cysteine-rich protein 61 (CCN1) promotes skin aging via upregulation of IL-1β in chronically sun-exposed human skin. AGE (DORDRECHT, NETHERLANDS) 2014; 36:353-364. [PMID: 23881607 PMCID: PMC3889915 DOI: 10.1007/s11357-013-9565-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 07/04/2013] [Indexed: 05/27/2023]
Abstract
Chronic exposure of human skin to solar ultraviolet (UV) irradiation causes premature skin aging, which is characterized by reduced type I collagen production and increased fragmentation of the dermal collagenous extracellular matrix. This imbalance of collagen homeostasis is mediated, in part, by elevated expression of the matricellular protein cysteine-rich protein 61 (CCN1), in dermal fibroblasts, the primary collagen producing cell type in human skin. Here, we report that the actions of CCN1 are mediated by induction of interleukin 1β (IL-1β). CCN1 and IL-1β are strikingly induced by acute UV irradiation, and constitutively elevated in sun-exposed prematurely aged human skin. Elevated CCN1 rapidly induces IL-1β, inhibits type I collagen production, and upregulates matrix metalloproteinase-1, which degrades collagen fibrils. Blockade of IL-1β actions by IL-1 receptor antagonist largely prevents the deleterious effects of CCN1 on collagen homeostasis. Furthermore, knockdown of CCN1 significantly reduces induction of IL-1β by UV irradiation, and thereby partially prevents collagen loss. These data demonstrate that elevated CCN1promotes inflammaging and collagen loss via induction of IL-1β and thereby contributes to the pathophysiology of premature aging in chronically sun-exposed human skin.
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Affiliation(s)
- Zhaoping Qin
- Department of Dermatology, University of Michigan Medical School, 1301, E. Catherine, Medical Science I, Room 6447, Ann Arbor, MI 48109-5609 USA
| | - Toru Okubo
- Department of Dermatology, University of Michigan Medical School, 1301, E. Catherine, Medical Science I, Room 6447, Ann Arbor, MI 48109-5609 USA
| | - John J. Voorhees
- Department of Dermatology, University of Michigan Medical School, 1301, E. Catherine, Medical Science I, Room 6447, Ann Arbor, MI 48109-5609 USA
| | - Gary J. Fisher
- Department of Dermatology, University of Michigan Medical School, 1301, E. Catherine, Medical Science I, Room 6447, Ann Arbor, MI 48109-5609 USA
| | - Taihao Quan
- Department of Dermatology, University of Michigan Medical School, 1301, E. Catherine, Medical Science I, Room 6447, Ann Arbor, MI 48109-5609 USA
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Ghosh R, Guha D, Bhowmik S, Karmakar S. Antioxidant enzymes and the mechanism of the bystander effect induced by ultraviolet C irradiation of A375 human melanoma cells. Mutat Res 2013; 757:83-90. [PMID: 23845763 DOI: 10.1016/j.mrgentox.2013.06.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 06/12/2013] [Accepted: 06/30/2013] [Indexed: 11/30/2022]
Abstract
Irradiated cells generate dynamic responses in non-irradiated cells; this signaling phenomenon is known as the bystander effect (BE). Factors secreted by the irradiated cells communicate some of these signals. Conditioned medium from UVC-irradiated A375 human melanoma cells was used to study the BE. Exposure of cells to conditioned medium induce cell-cycle arrest at the G2/M transition. Although conditioned medium treatment, by itself, did not alter cell viability, treated cells were more resistant to the lethal action of UVC or H2O2. This protective effect of conditioned medium was lost within 8h. Apoptotic or autophagic cell death was not involved in this resistance. Exposure to conditioned medium did not influence the rate of DNA repair, as measured by NAD(+) depletion. The activities of catalase and superoxide dismutase were elevated in cells exposed to conditioned medium, but returned to normal levels by 8h post-treatment. These results indicate a close correlation between BE-stimulated antioxidant activity and cellular sensitivity. Cell-cycle arrest and stimulation of antioxidant activity may account for the resistance to killing that was observed in bystander cells exposed to UVC or H2O2 treatment and are consistent with the role of the BE as a natural defense function triggered by UVC irradiation.
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Affiliation(s)
- Rita Ghosh
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani 741235, West Bengal, India.
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Wagener FADTG, Carels CE, Lundvig DMS. Targeting the redox balance in inflammatory skin conditions. Int J Mol Sci 2013; 14:9126-67. [PMID: 23624605 PMCID: PMC3676777 DOI: 10.3390/ijms14059126] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 04/10/2013] [Accepted: 04/16/2013] [Indexed: 12/17/2022] Open
Abstract
Reactive oxygen species (ROS) can be both beneficial and deleterious. Under normal physiological conditions, ROS production is tightly regulated, and ROS participate in both pathogen defense and cellular signaling. However, insufficient ROS detoxification or ROS overproduction generates oxidative stress, resulting in cellular damage. Oxidative stress has been linked to various inflammatory diseases. Inflammation is an essential response in the protection against injurious insults and thus important at the onset of wound healing. However, hampered resolution of inflammation can result in a chronic, exaggerated response with additional tissue damage. In the pathogenesis of several inflammatory skin conditions, e.g., sunburn and psoriasis, inflammatory-mediated tissue damage is central. The prolonged release of excess ROS in the skin can aggravate inflammatory injury and promote chronic inflammation. The cellular redox balance is therefore tightly regulated by several (enzymatic) antioxidants and pro-oxidants; however, in case of chronic inflammation, the antioxidant system may be depleted, and prolonged oxidative stress occurs. Due to the central role of ROS in inflammatory pathologies, restoring the redox balance forms an innovative therapeutic target in the development of new strategies for treating inflammatory skin conditions. Nevertheless, the clinical use of antioxidant-related therapies is still in its infancy.
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Affiliation(s)
- Frank A. D. T. G. Wagener
- Authors to whom correspondence should be addressed; E-Mails: (F.A.D.T.G.W.); (D.M.S.L.); Tel.: +31-24-3614082 (F.A.D.T.G.W.); Fax: +31-24-3540631 (F.A.D.T.G.W. & D.M.S.L.)
| | | | - Ditte M. S. Lundvig
- Authors to whom correspondence should be addressed; E-Mails: (F.A.D.T.G.W.); (D.M.S.L.); Tel.: +31-24-3614082 (F.A.D.T.G.W.); Fax: +31-24-3540631 (F.A.D.T.G.W. & D.M.S.L.)
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Tongkao-on W, Gordon-Thomson C, Dixon KM, Song EJ, Luu T, Carter SE, Sequeira VB, Reeve VE, Mason RS. Novel vitamin D compounds and skin cancer prevention. DERMATO-ENDOCRINOLOGY 2013; 5:20-33. [PMID: 24494039 PMCID: PMC3897591 DOI: 10.4161/derm.23939] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 02/09/2013] [Indexed: 01/10/2023]
Abstract
As skin cancer is one of the most costly health issues in many countries, particularly in Australia, the possibility that vitamin D compounds might contribute to prevention of this disease is becoming increasingly more attractive to researchers and health communities. In this article, important epidemiologic, mechanistic and experimental data supporting the chemopreventive potential of several vitamin D-related compounds are explored. Evidence of photoprotection by the active hormone, 1α,25dihydroxyvitamin D3, as well as a derivative of an over-irradiation product, lumisterol, a fluorinated analog and bufalin, a potential vitamin D-like compound, are provided. The aim of this article is to understand how vitamin D compounds contribute to UV adaptation and potentially, skin cancer prevention.
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Affiliation(s)
- Wannit Tongkao-on
- Department of Physiology Anatomy & Histology; Bosch Institute; The University of Sydney; Sydney, NSW Australia
| | - Clare Gordon-Thomson
- Department of Physiology Anatomy & Histology; Bosch Institute; The University of Sydney; Sydney, NSW Australia
| | - Katie M. Dixon
- Department of Physiology Anatomy & Histology; Bosch Institute; The University of Sydney; Sydney, NSW Australia
| | - Eric J. Song
- Department of Physiology Anatomy & Histology; Bosch Institute; The University of Sydney; Sydney, NSW Australia
| | - Tan Luu
- Department of Physiology Anatomy & Histology; Bosch Institute; The University of Sydney; Sydney, NSW Australia
| | - Sally E. Carter
- Department of Physiology Anatomy & Histology; Bosch Institute; The University of Sydney; Sydney, NSW Australia
| | - Vanessa B. Sequeira
- Department of Physiology Anatomy & Histology; Bosch Institute; The University of Sydney; Sydney, NSW Australia
- Oncology Research Unit; School of Medical Sciences; The University of New South Wales; Kensington, NSW Australia
| | - Vivienne E. Reeve
- Department of Faculty of Veterinary Science; The University of Sydney; Sydney, NSW Australia
| | - Rebecca S. Mason
- Department of Physiology Anatomy & Histology; Bosch Institute; The University of Sydney; Sydney, NSW Australia
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Hiramoto K, Kobayashi H, Yamate Y, Ishii M, Sato EF. Intercellular pathway through hyaluronic acid in UVB-induced inflammation. Exp Dermatol 2012; 21:911-4. [DOI: 10.1111/exd.12032] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/18/2012] [Indexed: 12/11/2022]
Affiliation(s)
| | - Hiromi Kobayashi
- Department of Dermatology; Osaka City University Graduate School of Medicine; Osaka; Japan
| | | | - Masamitsu Ishii
- Department of Dermatology; Osaka City University Graduate School of Medicine; Osaka; Japan
| | - Eisuke F. Sato
- Brain Science Institute; Osaka City University Graduate School of Medicine; Osaka; Japan
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26
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Ghosh R, Guha D, Bhowmik S. UV Released Factors Induce Antioxidant Defense in A375 Cells. Photochem Photobiol 2012; 88:708-16. [DOI: 10.1111/j.1751-1097.2012.01105.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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27
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Chen N, Hu Y, Li WH, Eisinger M, Seiberg M, Lin CB. The role of keratinocyte growth factor in melanogenesis: a possible mechanism for the initiation of solar lentigines. Exp Dermatol 2011; 19:865-72. [PMID: 19780816 DOI: 10.1111/j.1600-0625.2009.00957.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Solar lentigines (SLs) are hyperpigmentary lesions presented on sun-exposed areas of the skin and associated with ageing. The molecular mechanism of SL initiation is not completely understood. Ultraviolet B (UVB) stimulates keratinocytes to produce interlukin-1 alpha (IL-1α), which then induces keratinocyte growth factor (KGF) secretion; therefore, we examined their possible roles in the induction of SLs. We found that KGF increases pigment production in both pigmented epidermal equivalents and human skin explants. In addition, UVB exposure increases KGF expression, and KGF treatment induces tyrosinase (TYR) expression in primary melanocytes. The KGF-induced pigmentary changes were confirmed using pigmented Yucatan swine, and human skins grafted onto immuno-deficient mice. In both model systems, the topical treatment with KGF, alone or in combination with IL-1α, resulted in the in vivo formation of hyperpigmentary lesions with increased pigment deposition and elongated rete ridges, which resemble the histological features of human SLs. Preliminary immunohistochemical analysis of human skins showed a moderate increase in KGF, and a strong induction in KGF receptor (KGFR) in SL lesions. In summary, KGF increases pigment production and deposition in vitro and in vivo. Moreover, we show for the first time the in vivo generation of hyperpigmentary lesions with histological resemblance to human SLs and indicate the involvement of KGF/KGFR in the molecular pathology of human SLs.
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Affiliation(s)
- Nannan Chen
- The Johnson and Johnson Skin Research Center, Consumer Product Worldwide, A Unit of Johnson and Johnson Consumer Companies, Inc, Skillman, NJ 08502, USA
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28
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Feldmeyer L, Werner S, French LE, Beer HD. Interleukin-1, inflammasomes and the skin. Eur J Cell Biol 2010; 89:638-44. [PMID: 20605059 DOI: 10.1016/j.ejcb.2010.04.008] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 04/26/2010] [Accepted: 04/26/2010] [Indexed: 12/21/2022] Open
Abstract
Interleukin (IL)-1 is a highly active and pleiotropic pro-inflammatory cytokine. Recent data impressively demonstrate that activating mutations in a human gene involved in proIL-1beta maturation or loss-of-function mutations in the gene encoding IL-1 receptor antagonist (IL-1Ra) cause excessive activity of this cytokine. This can result in life-threatening systemic and local inflammation, particularly in the skin. Interestingly, experiments in mice revealed that epidermal keratinocytes can secrete large amounts of IL-1alpha, which induces an inflammatory response in the skin. Secretion of IL-1 requires caspase-1 activity, and activation of the protease takes place in innate immune complexes, called inflammasomes. As keratinocytes express and activate caspase-1 in an inflammasome-dependent manner, these epithelial cells might be critically involved in the innate immunity of the skin. In this review we summarize the current knowledge on IL-1 and inflammasomes in the skin, particularly their involvement in skin homeostasis and disease. In addition, we discuss the hypothesis that keratinocytes are not only static bricks of the epidermal wall, but immunologically active cells critically involved in different (auto)-inflammatory (skin) diseases.
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Affiliation(s)
- Laurence Feldmeyer
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
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29
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Johnston A, Gudjonsson JE, Aphale A, Guzman AM, Stoll SW, Elder JT. EGFR and IL-1 signaling synergistically promote keratinocyte antimicrobial defenses in a differentiation-dependent manner. J Invest Dermatol 2010; 131:329-37. [PMID: 20962853 DOI: 10.1038/jid.2010.313] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Ligands of the EGF family regulate autocrine keratinocyte proliferation, and IL-1 family cytokines orchestrate epithelial defense responses. Although members of both families are overexpressed in wound healing and psoriasis, their roles in regulating the innate immune functions of keratinocytes remain incompletely explored. Using sensitive assays, we found significant increases of heparin-binding EGF-like growth factor, transforming growth factor-α, and amphiregulin mRNA and protein in lesional psoriasis compared with uninvolved or control skin. In normal human keratinocyte (NHK) monolayers, EGFR ligands were ineffective in inducing DEFB4, S100A7, and CCL20 mRNAs and human β-defensin (hBD)-2 peptide. Combined with IL-1α, however, EGFR ligands provoked 250 × more DEFB4 and CCL20 and a 9-fold rise in S100A7 mRNA relative to the EGFR ligand alone. This synergy was also reflected in secreted hBD-2 protein, both from NHK and reconstituted human epidermis. Keratinocyte differentiation was critical for these responses, as postconfluent NHK yielded mRNA and protein levels an order of magnitude greater than subconfluent cells. Differentiation also influenced signal transduction, with subconfluent cells using NF-κB and postconfluent cells using EGFR, MEK1/2, and p38. We propose that EGFR ligands are important modifiers of IL-1 activity, synergizing with IL-1 to stimulate epidermal production of hBD-2, S100A7, and CCL20, three of the most upregulated transcripts in psoriatic plaques.
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Affiliation(s)
- Andrew Johnston
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan 48109, USA.
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30
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Jennings JA, Chen D, Feldman DS. Upregulation of chemokine (C-C motif) ligand 20 in adult epidermal keratinocytes in direct current electric fields. Arch Dermatol Res 2009; 302:211-20. [PMID: 19784662 DOI: 10.1007/s00403-009-0995-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Revised: 09/05/2009] [Accepted: 09/10/2009] [Indexed: 12/18/2022]
Abstract
Electric fields (EFs) of around 100 mV/mm are present in normal healing wounds and induce the directional migration of epithelial cells. Reepithelialization during wound healing thus may be controlled in part by this electrical signal. In this study, the early transcriptional response of human epidermal keratinocytes to EFs is examined using microarrays. Increased expression of various chemokines, interleukins, and other inflammatory response genes indicates that EFs stimulate keratinocyte activation and immune stimulatory activity. Gene expression activity further suggests that interleukin 1 is either released or activated in EFs. Expression of the chemokine CCL20 steadily increases at 100 mV/mm over time until around 8 h after exposure. This chemokine is also expressed at field strengths of 300 mV/mm-above the level of endogenous wound fields. The early effects of EFs on epithelial gene expression activity identified in these studies suggest the importance of naturally occurring EFs both in repair mechanisms and for the possibility of controlling these responses therapeutically.
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Affiliation(s)
- Jessica Amber Jennings
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1075 13th St. South, Birmingham, AL 35294, USA.
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31
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Franzke CW, Bruckner-Tuderman L, Blobel CP. Shedding of collagen XVII/BP180 in skin depends on both ADAM10 and ADAM9. J Biol Chem 2009; 284:23386-96. [PMID: 19574220 PMCID: PMC2749112 DOI: 10.1074/jbc.m109.034090] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Indexed: 11/06/2022] Open
Abstract
Collagen XVII is a transmembrane collagen and the major autoantigen of the autoimmune skin blistering disease bullous pemphigoid. Collagen XVII is proteolytically released from the membrane, and the pathogenic epitope harbors the cleavage site for its ectodomain shedding, suggesting that proteolysis has an important role in regulating the function of collagen XVII in skin homeostasis. Previous studies identified ADAMs 9, 10, and 17 as candidate collagen XVII sheddases and suggested that ADAM17 is a major sheddase. Here we show that ADAM17 only indirectly affects collagen XVII shedding and that ADAMs 9 and 10 are the most prominent collagen XVII sheddases in primary keratinocytes because (a) collagen XVII shedding was not stimulated by phorbol esters, known activators of ADAM17, (b) constitutive and calcium influx-stimulated shedding was sensitive to the ADAM10-selective inhibitor GI254023X and was strongly reduced in Adam10(-/-) cells, (c) there was a 55% decrease in constitutive collagen XVII ectodomain shedding from Adam9(-/-) keratinocytes, and (d) H(2)O(2) enhanced ADAM9 expression and stimulated collagen XVII shedding in skin and keratinocytes of wild type mice but not of Adam9(-/-) mice. We conclude that ADAM9 and ADAM10 can both contribute to collagen XVII shedding in skin with an enhanced relative contribution of ADAM9 in the presence of reactive oxygen species. These results provide critical new insights into the identity and regulation of the major sheddases for collagen XVII in keratinocytes and skin and have implications for the treatment of blistering diseases of the skin.
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Affiliation(s)
- Claus-Werner Franzke
- From the Arthritis and Tissue Degeneration Program, Hospital for Special Surgery, New York, New York 10021
- the Department of Dermatology, University of Freiburg, 79104 Freiburg, Germany, and
| | - Leena Bruckner-Tuderman
- the Department of Dermatology, University of Freiburg, 79104 Freiburg, Germany, and
- the Freiburg Institute of Advanced Studies, School of Life Sciences, D-79085 Freiburg, Germany
| | - Carl P. Blobel
- From the Arthritis and Tissue Degeneration Program, Hospital for Special Surgery, New York, New York 10021
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32
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Van Laethem A, Garmyn M, Agostinis P. Starting and propagating apoptotic signals in UVB irradiated keratinocytes. Photochem Photobiol Sci 2009; 8:299-308. [DOI: 10.1039/b813346h] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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34
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UVB and proinflammatory cytokines synergistically activate TNF-alpha production in keratinocytes through enhanced gene transcription. J Invest Dermatol 2008; 129:994-1001. [PMID: 19005488 DOI: 10.1038/jid.2008.332] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UVB irradiation potently induces cytokines in the skin, including IL-1alpha and tumor necrosis factor-alpha (TNF-alpha). The mechanism for TNF-alpha induction in UVB-irradiated keratinocytes is not clear. In this study, we explored the effects of UVB and cytokines, alone or in combination in human keratinocytes. Keratinocytes were sham- or UVB-irradiated with 30 mJ cm(-2), and then incubated in the absence or presence of IFN-alpha2b, TNF-alpha, or IL-1alpha. UVB and IL-1alpha treatment synergistically enhanced TNF-alpha secretion and mRNA levels in human keratinocytes, similar to the findings reported previously in human fibroblasts. Exogenous recombinant TNF-alpha up-regulates its own mRNA level. However, addition of IFN-alpha2b did not show any additive effect on TNF-alpha mRNA induction. To understand the regulation of TNF-alpha mRNA by UVB, with or without IL-1alpha, we examined the transcription rate and half-life of TNF-alpha mRNA. Treatment of keratinocytes with IL-1alpha or UVB alone increased TNF-alpha gene transcription 4- to 5-fold over sham treatment, and TNF-alpha gene transcription increased 11-fold in cells treated with UVB plus IL-1alpha over sham. UVB with IL-1alpha did not enhance the half-life of TNF-alpha mRNA over that seen with UVB alone. In conclusion, TNF-alpha expression in primary keratinocytes is upregulated transcriptionally by UVB and IL-1alpha.
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35
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Barisic S, Strozyk E, Peters N, Walczak H, Kulms D. Identification of PP2A as a crucial regulator of the NF-kappaB feedback loop: its inhibition by UVB turns NF-kappaB into a pro-apoptotic factor. Cell Death Differ 2008; 15:1681-90. [PMID: 18583989 DOI: 10.1038/cdd.2008.98] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Although nuclear factor-kappaB (NF-kappaB) usually exerts anti-apoptotic activity, upon activation by interleukin-1 (IL-1) it enhances ultraviolet-B radiation (UVB)-induced apoptosis. This paradoxical effect is associated with NF-kappaB-dependent pronounced secretion of tumour necrosis factor-alpha (TNF) which activates TNF-R1 in an autocrine fashion to enhance UVB-induced apoptosis. We demonstrate that sustained TNF transcription in UVB+IL-1-treated cells involves complete abrogation of the negative feedback loop of NF-kappaB preventing IkappaBalpha resynthesis, hence allowing uncontrolled NF-kappaB activity. We show that IkappaBalpha is not transcriptionally inhibited but resynthesized protein is immediately marked for degradation due to persistent inhibitor of kappaB kinasebeta (IKKbeta) activity. Continuous IKKbeta phosphorylation and activation is caused by UVB-mediated inhibition of the phosphatase PP2A. This study demonstrates that the cellular response to different NF-kappaB activators may be converted to the opposite reaction when both stimuli act in concert. Our data shed new light on the significance of negative feedback regulation of NF-kappaB and identifies PP2A as the key regulator of this process.
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Affiliation(s)
- S Barisic
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
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36
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Kaneko K, Smetana-Just U, Matsui M, Young AR, John S, Norval M, Walker SL. cis-Urocanic Acid Initiates Gene Transcription in Primary Human Keratinocytes. THE JOURNAL OF IMMUNOLOGY 2008; 181:217-24. [DOI: 10.4049/jimmunol.181.1.217] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Feldmeyer L, Keller M, Niklaus G, Hohl D, Werner S, Beer HD. The inflammasome mediates UVB-induced activation and secretion of interleukin-1beta by keratinocytes. Curr Biol 2008; 17:1140-5. [PMID: 17600714 DOI: 10.1016/j.cub.2007.05.074] [Citation(s) in RCA: 422] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2007] [Revised: 05/24/2007] [Accepted: 05/24/2007] [Indexed: 10/23/2022]
Abstract
It has long been known that human keratinocytes are a potent source of the proinflammatory cytokines proIL-1alpha and -1beta[1], which are activated and released in response to UV irradiation [2]. However, the intracellular pathways, which regulate maturation and secretion of IL-1 in keratinocytes, are unknown. Here we show that the UVB-mediated enhancement of cytoplasmic Ca(2+) is required for activation of the IL-1beta-converting enzyme caspase-1 by the inflammasome, a multiprotein innate immune complex [3, 4]. Caspase-1 in turn activates proIL-1beta, and keratinocytes secrete the cytokine as well as inflammasome components. These results demonstrate the presence of a proIL-1beta-processing inflammasome in nonprofessional immune cells and the necessity of inflammasome components for the UVB-induced secretion of IL-1beta. This supports the concept that keratinocytes are important immuno-competent cells under physiological and pathological conditions [5].
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Affiliation(s)
- Laurence Feldmeyer
- Institute of Cell Biology, Department of Biology, ETH Zurich, Zurich, Switzerland
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38
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Fagot D, Asselineau D, Bernerd F. Matrix Metalloproteinase-1 Production Observed After Solar-Simulated Radiation Exposure is Assumed by Dermal Fibroblasts but Involves a Paracrine Activation Through Epidermal Keratinocytes¶. Photochem Photobiol 2007. [DOI: 10.1111/j.1751-1097.2004.tb01266.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Hino R, Kobayashi M, Mori T, Orimo H, Shimauchi T, Kabashima K, Tokura Y. Inhibition of T helper 2 chemokine production by narrowband ultraviolet B in cultured keratinocytes. Br J Dermatol 2007; 156:830-7. [PMID: 17313491 DOI: 10.1111/j.1365-2133.2007.07774.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Narrowband ultraviolet B (NB-UVB) has recently been used for the treatment of various skin disorders. Its effects on the production of cytokines and chemokines by keratinocytes are unknown. OBJECTIVES To investigate the effect of NB-UVB on production of chemokines and proinflammatory cytokines by keratinocytes in comparison with broadband (BB)-UVB. METHODS Normal human epidermal keratinocytes (or the human keratinocyte cell line HaCaT in some experiments) at semiconfluency were irradiated with NB-UVB at 10, 100, 500 or 1000 mJ cm(-2) or BB-UVB at 10 or 100 mJ cm(-2). The cultures were maintained in the presence or absence of interferon (IFN)-gamma at 200 U mL(-1). The 72-h culture supernatants were analysed by enzyme-linked immunosorbent assay to quantify T helper (Th)1 chemokines (IFN-inducible protein 10 and monokine induced by IFN-gamma), Th2 chemokines [macrophage-derived chemokine (MDC) and thymus and activation-regulated chemokine (TARC)] and proinflammatory cytokines [interleukin (IL)-1alpha and tumour necrosis factor (TNF)-alpha]. The expression of mRNA for these molecules was simultaneously assessed by reverse transcriptase-polymerase chain reaction. The culture supernatants were also tested for their chemotactic activity for Th1 and Th2 cells. The two UVB sources were compared on the basis of their minimal erythemal doses and clinically used doses. RESULTS Although both NB-UVB and BB-UVB increased the production of IL-1alpha and TNF-alpha, the augmentative effect of NB-UVB was less than that of BB-UVB. Both wavelength ranges of UVB enhanced or had no effect on Th1 chemokine production, but suppressed the production of Th2 chemokines MDC and TARC. This was confirmed by chemotactic assay, which showed decreased chemotactic activity for Th2 cells by the culture supernatants from NB-UVB-irradiated keratinocytes. CONCLUSIONS NB-UVB reduces the production of Th2 chemokines without excess production of proinflammatory cytokines, suggesting its therapeutic effectiveness on Th2-mediated skin disorders as well as its relative safety in clinical usage.
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Affiliation(s)
- R Hino
- Department of Dermatology, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan.
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40
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Averbeck M, Beilharz S, Bauer M, Gebhardt C, Hartmann A, Hochleitner K, Kauer F, Voith U, Simon JC, Termeer C. In situ profiling and quantification of cytokines released during ultraviolet B-induced inflammation by combining dermal microdialysis and protein microarrays. Exp Dermatol 2006; 15:447-54. [PMID: 16689861 DOI: 10.1111/j.0906-6705.2006.00429.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In skin, an evolving inflammatory or immune response is triggered by early release of a cytokine cascade into the extracellular space. Investigation of extracellular cytokine secretion in situ has been limited by low cut-off filtering membranes and sample volume size and the inability to monitor changes in cytokine protein levels in real-time in situ. Here, we combine for the first time the methods of intradermal microdialysis and antibody protein arraying to profile the early cascade of multiple cytokines in a complex inflammatory response exemplified by ultraviolet B (UVB)-induced inflammation. We observed significant differences of the cytokine and growth factor responses after tissue injury by catheter placement and UVB-induced inflammation. UVB irradiation initiates a rapid proinflammatory response followed by a mixed TH1/TH2 response in which ultimately TH2 cytokines IL-4 and IL10 predominated after 24 h. This most likely indicates the termination and self limitation of the inflammatory response. We conclude that the combination of dermal microdialysis and protein microarray offers a powerful tool to analyze in real-time the complex and rapidly changing interstitial protein milieu during cutaneous inflammatory responses.
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Affiliation(s)
- Marco Averbeck
- Department of Dermatology, Venerology and Allergology, University of Leipzig, Germany.
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41
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Fagot D, Asselineau D, Bernerd F. Matrix metalloproteinase-1 production observed after solar-simulated radiation exposure is assumed by dermal fibroblasts but involves a paracrine activation through epidermal keratinocytes. Photochem Photobiol 2004; 79:499-505. [PMID: 15291299 DOI: 10.1562/yg-03-11-r1.1] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Chronic exposure of human skin to solar UV radiation leads to serious dermal damages, a hallmark of photoaging. In vivo, acute UV radiation has been shown previously to induce various matrix-degrading proteases. Among them, matrix metalloproteinase-1 (MMP-1) has been suggested to be involved in skin photodamage. The purpose of this study was to investigate the effects of solar-simulated radiation (SSR) on MMP-1 production in normal human skin cells. SSR exposure of human skin reconstructed in vitro comprising both a differentiated epidermis and a fibroblast-populated dermal equivalent led to an increase in MMP-1 production, which was abolished when epidermis was removed immediately after SSR exposure. In addition, SSR exposure of differentiated keratinocytes grown on an acellular collagen gel did not induce MMP-1 production. Experiments on cell cultures grown on plastic confirmed that keratinocytes failed, in contrast with fibroblasts, to produce MMP-1 in response to SSR exposure. However, when conditioned medium from SSR-exposed keratinocytes was added to human fibroblasts in culture, MMP-1 production was induced. Altogether, these data show that MMP-1 production observed after SSR exposure involved the release of soluble epidermal factors, which could modulate its production by dermal fibroblasts.
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42
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Horiuchi Y, Bae S, Katayama I. Pro-inflammatory cytokine IL-1α potential for tissue repair in chemically and mechanically induced injury in cultured human keratinocytes. J Dermatol Sci 2004; 35:224-6. [PMID: 15381245 DOI: 10.1016/j.jdermsci.2004.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2004] [Indexed: 11/17/2022]
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43
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Heck DE, Gerecke DR, Vetrano AM, Laskin JD. Solar ultraviolet radiation as a trigger of cell signal transduction. Toxicol Appl Pharmacol 2004; 195:288-97. [PMID: 15020191 DOI: 10.1016/j.taap.2003.09.028] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Accepted: 09/12/2003] [Indexed: 10/26/2022]
Abstract
Ultraviolet light radiation in sunlight is known to cause major alterations in growth and differentiation patterns of exposed human tissues. The specific effects depend on the wavelengths and doses of the light, and the nature of the exposed tissue. Both growth inhibition and proliferation are observed, as well as inflammation and immune suppression. Whereas in the clinical setting, these responses may be beneficial, for example, in the treatment of psoriasis and atopic dermatitis, as an environmental toxicant, ultraviolet light can induce significant tissue damage. Thus, in the eye, ultraviolet light causes cataracts, while in the skin, it induces premature aging and the development of cancer. Although ultraviolet light can damage many tissue components including membrane phospholipids, proteins, and nucleic acids, it is now recognized that many of its cellular effects are due to alterations in growth factor- and cytokine-mediated signal transduction pathways leading to aberrant gene expression. It is generally thought that reactive oxygen intermediates are mediators of some of the damage induced by ultraviolet light. Generated when ultraviolet light is absorbed by endogenous photosensitizers in the presence of molecular oxygen, reactive oxygen intermediates and their metabolites induce damage by reacting with cellular electrophiles, some of which can directly initiate cell signaling processes. In an additional layer of complexity, ultraviolet light-damaged nucleic acids initiate signaling during the activation of repair processes. Thus, mechanisms by which solar ultraviolet radiation triggers cell signal transduction are multifactorial. The present review summarizes some of the mechanisms by which ultraviolet light alters signaling pathways as well as the genes important in the beneficial and toxic effects of ultraviolet light.
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Affiliation(s)
- Diane E Heck
- Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854, USA
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44
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Feliciani C, Toto P, Wang B, Sauder DN, Amerio P, Tulli A. Urokinase plasminogen activator mRNA is induced by IL-1alpha and TNF-alpha in in vitro acantholysis. Exp Dermatol 2003; 12:466-71. [PMID: 12930304 DOI: 10.1034/j.1600-0625.2002.120415.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The role of urokinase type plasminogen activator (uPA) has been well documented in the pathogenesis of pemphigus vulgaris (PV). Activation of plasminogen into active serine protease plasmin initiates extracellular proteolysis leading to acantholysis but the mechanisms underlying this process are not clearly understood. We have previously shown that keratinocyte derived cytokines IL-1alpha and TNF-alpha are involved in PV-induced acantholysis. In the present study we sought to examine whether keratinocyte-derived IL-1alpha and TNF-alpha are correlated with uPA induction in keratinocytes during acantholysis. Normal human keratinocytes were incubated with diluted PV serum. mRNAs for IL-1alpha, TNF-alpha and uPA were examined with RT-PCR at various time points and acantholysis was measured. IL-1alpha, TNF-alpha and uPA mRNAs were all induced in keratinocytes following PV serum stimulation; IL-1alpha/TNF-alpha mRNAs' expression was earlier than the expression of uPA mRNA. To further examine the role of IL-1alpha, TNF-alpha and uPA in acantholysis, we performed antibody blocking studies. Anti-IL-1alpha, anti-TNF-alpha and anti-uPA antibodies suppressed acantholysis by 76%, 80% and 90%, respectively. In addition, anti-IL-1alpha and anti-TNF-alpha antibodies inhibited uPA mRNA induction, whereas anti-uPA antibodies did not alter IL-1alpha/TNF-alpha mRNAs' expression. Our results confirm the role of uPA in acantholysis and suggest an involvement of IL-1alpha/TNF-alpha in uPA induction.
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Affiliation(s)
- Claudio Feliciani
- Department of Dermatology, University 'G. d'Annunzio', Chieti, Italy
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45
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Sur R, Heck DE, Mariano TM, Jin Y, Murphy WJ, Laskin JD. UVB light suppresses nitric oxide production by murine keratinocytes and macrophages. Biochem Pharmacol 2002; 64:1469-81. [PMID: 12417260 DOI: 10.1016/s0006-2952(02)01419-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Nitric oxide is an important mediator of excessive cell growth and inflammation associated with many epidermal proliferative disorders. It is a highly reactive oxidant generated in keratinocytes and macrophages via the inducible form of the enzyme nitric oxide synthase (NOS2). In the present studies, we examined the effects of ultraviolet light (UVB, 2.5-25mJ/cm(2)) on interferon-gamma (IFN-gamma)-induced expression of NOS2 in these cells. Transient transfection assays using wild-type and mutant NOS2 promoter/luciferase reporter constructs showed that DNA binding of the transcription factors Stat1 and NF-kappaB was essential for optimal expression of the NOS2 gene. Whereas NF-kappaB was constitutively expressed in both cell types, Stat1 phosphorylation and nuclear binding activity were dependent upon IFN-gamma. UVB light, which is used therapeutically to treat inflammatory dermatosis, was found to suppress IFN-gamma-induced expression of NOS2 mRNA and protein, and nitric oxide production in both keratinocytes and macrophages. In macrophages, this was associated with complete inhibition of NF-kappaB nuclear binding activity and partial (approximately 20-25%) reduction of Stat1 activity. In keratinocytes, both responses were partially reduced at the highest doses of UVB light (15-25mJ/cm(2)). Whereas in macrophages UVB light suppressed NOS2 wild-type promoter-luciferase reporter activity, this activity was stimulated in keratinocytes. These data suggest that UVB light functions to suppress NOS2 gene expression in macrophages by inhibiting the activity of key regulatory transcription factors. In contrast, in keratinocytes, inhibition occurs downstream of NOS2 promoter activity.
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Affiliation(s)
- Runa Sur
- Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854, USA
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46
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Elias PM, Ghadially R. The aged epidermal permeability barrier: basis for functional abnormalities. Clin Geriatr Med 2002; 18:103-20, vii. [PMID: 11913735 DOI: 10.1016/s0749-0690(03)00037-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Aged epidermis develops an abnormality in permeability barrier homeostasis, which is accentuated further in photoaged skin. The biochemical basis is a global reduction in stratum corneum lipids and profound abnormality in cholesterol synthesis. Various cytokine/growth factor signaling pathways are abnormal in aged skin, particularly in the interleukin-1 family. Barrier repair therapy can be effective in restoring normal function if a cholesterol-dominant mixture of the three key physiologic lipids, including ceramides and free fatty acids, is emphasized.
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Affiliation(s)
- Peter M Elias
- Department of Dermatology, University of California, San Francisco, USA.
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47
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Suzuki H, Kalair W, Shivji GM, Wang B, Toto P, Amerio P, Kraemer KH, Sauder DN. Impaired ultraviolet-B-induced cytokine induction in xeroderma pigmentosum fibroblasts. J Invest Dermatol 2001; 117:1151-5. [PMID: 11710926 DOI: 10.1046/j.0022-202x.2001.01525.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Xeroderma pigmentosum is a rare, autosomal recessive disease in which patients develop excessive solar damage at an early age and have a 1000-fold increased risk of developing cutaneous neoplasms. Xeroderma pigmentosum can be classified into seven complementation groups (A-G) with defects in different DNA nucleotide excision repair genes. Xeroderma pigmentosum patients also have impaired immune function including reduced natural killer cell activity and impaired induction of interferon-gamma. We hypothesized that altered cytokine induction may contribute to the immune defect in xeroderma pigmentosum patients. We examined cytokine mRNA expression after ultraviolet B irradiation using reverse transcriptase polymerase chain reaction in fibroblasts derived from five xeroderma pigmentosum patients in complementation groups A, C, and D and in complemented XP-A and XP-D cells. Cytokines interleukin-1beta and interleukin-6 displayed impaired ultraviolet B induction whereas interleukin-8 had normal induction in the xeroderma pigmentosum fibroblasts. Stable complementation of XP-A and XP-D cell lines increased ultraviolet-B-induced interleukin-1beta and interleukin-6 expression. These results demonstrate a deficient response of xeroderma pigmentosum fibroblasts to ultraviolet B in terms of cytokine interleukin-1beta and interleukin-6 induction but normal interleukin-8 induction and exhibit a role for DNA repair in cytokine induction.
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Affiliation(s)
- H Suzuki
- Division of Dermatology, University of Toronto, Sunnybrook and Women's College Health Science Center, Toronto, Ontario, Canada
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48
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Sugawara T, Gallucci RM, Simeonova PP, Luster MI. Regulation and role of interleukin 6 in wounded human epithelial keratinocytes. Cytokine 2001; 15:328-36. [PMID: 11594800 DOI: 10.1006/cyto.2001.0946] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dermal wounding is accompanied by inflammation and the resulting proinflammatory cytokines, including interleukin (IL)-6, are thought to play an important role in the repair process. IL-6 is produced by normal human keratinocytes to various dermatological diseases and we have recently shown it is also required for normal wound repair. However, neither the events responsible for its induction nor its role in repair have been clearly identified. Using a recently developed in vitro wounding model, we demonstrate that IL-6 mRNA is expressed and immunoreactive IL-6 is released from cultures of human epidermal keratinocytes (NHEKs) following wounding. The transcription factors, NF kappa B and NF-IL-6 (C/EBP beta), which coordinately help regulate IL-6 expression, were activated following wounding and preceded the appearance of IL-6. Addition of IL-1 alpha to NHEK cultures increased IL-6 production and activated NF kappa B and C/EBP beta. Addition of the IL-1 alpha receptor antagonist inhibited both IL-6 mRNA expression and the transcription factors following wounding. Immunoreactive IL-1 alpha was detected in the medium following wounding in the absence of new message. Furthermore, addition of IL-6 to NHEK cultures decreased the expression of keratins 1 and 10, differentiation markers of keratinocytes, while proliferation was not affected. Taken together, these data indicate that constitutive keratinocyte-derived IL-1 alpha is a stimulus for IL-6 production in wounded epidermis, the response involves NF kappa B and C/EBP beta transcription factors, and IL-6 may be associated with modulation of keratinocyte differentiation rather than proliferation.
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Affiliation(s)
- T Sugawara
- Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control, 1095 Willowdale Road, Morgantown, WV 26505, USA
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49
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Herouy Y, Mellios P, Bandemir E, Dichmann S, Nockowski P, Schöpf E, Norgauer J. Inflammation in stasis dermatitis upregulates MMP-1, MMP-2 and MMP-13 expression. J Dermatol Sci 2001; 25:198-205. [PMID: 11240267 DOI: 10.1016/s0923-1811(00)00128-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Stasis dermatitis is a common disorder, which is a consequence of impaired venous drainage of the legs. It is characterized histologically by proliferation of small blood vessels in the papillary dermis. This neovascularization may lead occasionally to the formation of discrete papules due to inflammatory processes. In order to evaluate the role of matrix metalloproteinases (MMPs) in the acute phase of chronic venous insufficiency, we examined the production of MMP-1, -2, -13 and tissue inhibitors of metalloproteinase (TIMP)-1 and -2 in lesional skin of stasis dermatitis. A total of 19 patients affected by stasis dermatitis were included in this experimental study. Polymerase chain reaction, western blot and immunohistochemical studies on tissue specimen were performed. In lesional skin of stasis dermatitis, there was elevated gene expression and immunoreactivity for MMP-1, -2 and -13 in comparison to healthy controls. In contrast, genexpression and immunoreactivity for TIMP-1 and -2 were diminished in stasis dermatitis in comparison with healthy controls. Overexpression and production of MMP-1, -2 and -13 without inhibitory effects could be the result of cytokine mediated induction. Matrix metalloproteinases (MMPs) may play an important role in the remodeling of lesional skin in stasis dermatitis.
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Affiliation(s)
- Y Herouy
- Department of Dermatology, University Medical Center, Hauptstr. 7, 79104, Freiburg, Germany.
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50
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Abstract
Interleukin-8 (IL-8) belongs to the CXC chemokine family. IL-8 exerts its biological activities by binding to specific cell surface receptors, CXCR-1 and CXCR-2. Both receptors bind IL-8 with high affinity but they have different affinities for MGSA/Groalpha and NAP-2. It has been shown that the expression of epidermal CXCR-2 is increased in psoriasis, suggesting that activation of KC mediated by CXCR-2 contributes to the characteristic epidermal changes observed in psoriasis. In order to examine the mechanism(s) by which UVB therapy is effective for several dermatoses including psoriasis, we sought to examine if UVB would modulate the expression of CXCR-1 and CXCR-2 in human keratinocytes (KC). Constitutive expression of CXCR-1 and CXCR-2 mRNA was detected by RT-PCR in normal cultured human KC. After 100 or 300 J/m(2) irradiation, a decrease in CXCR-2 mRNA was detectable from 12 h after irradiation; this downregulation was observed until 48 h after irradiation. In contrast, the CXCR-1 mRNA level was unchanged. Immunohistochemical studies and flow cytometry analysis confirmed the suppressive effect of UVB on the expression of CXCR-2 protein in cultured human keratinocytes. Immunohistochemical studies on two minimal erythema doses (2MED)-exposed and 2MED-unexposed skin from healthy volunteers revealed that CXCR-2 staining occurred over the whole layer of the epidermis but at 24 h after 2MED irradiation, the positive staining of CXCR-2 was decreased. A faint CXCR-1 staining was observed in the lower part of the epidermis both in unexposed and exposed skins. Our results indicate that UVB-induced growth inhibition of KC in hyperproliferative skin disorders may, in part, be related to downregulation of CXCR-2.
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MESH Headings
- Antigens, CD/analysis
- Antigens, CD/genetics
- Cells, Cultured
- Down-Regulation/radiation effects
- Gene Expression/radiation effects
- Humans
- Immunoenzyme Techniques
- Keratinocytes/chemistry
- Keratinocytes/physiology
- Keratinocytes/radiation effects
- RNA, Messenger/analysis
- Receptors, Chemokine/analysis
- Receptors, Chemokine/genetics
- Receptors, Interleukin/analysis
- Receptors, Interleukin/genetics
- Receptors, Interleukin-8A
- Receptors, Interleukin-8B
- Reverse Transcriptase Polymerase Chain Reaction
- Skin/chemistry
- Skin/cytology
- Skin/radiation effects
- Ultraviolet Rays
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Affiliation(s)
- S Kondo
- Department of Dermatology, Faculty of Medicine, Sapporo Medical University, Sapporo, Japan.
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