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Huber T, Horioka-Duplix M, Chen Y, Saca VR, Ceraudo E, Chen Y, Sakmar TP. The role of signaling pathways mediated by the GPCRs CysLTR1/2 in melanocyte proliferation and senescence. Sci Signal 2024; 17:eadp3967. [PMID: 39288219 DOI: 10.1126/scisignal.adp3967] [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: 03/22/2024] [Accepted: 08/15/2024] [Indexed: 09/19/2024]
Abstract
In contrast with sun exposure-induced melanoma, rarer melanocytic tumors and neoplasms with low mutational burden present opportunities to study isolated signaling mechanisms. These include uveal melanoma and blue nevi, which are often driven by mutations within the G protein-coupled signaling cascade downstream of cysteinyl leukotriene receptor 2. Here, we review how the same mutations within this pathway drive the growth of melanocytes in one tissue but can inhibit the growth of those in another, exemplifying the role of the tissue environment in the delicate balance between uncontrolled cell growth and senescence.
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Affiliation(s)
- Thomas Huber
- Laboratory of Chemical Biology and Signal Transduction, Rockefeller University, New York, NY 10065, USA
| | - Mizuho Horioka-Duplix
- Laboratory of Chemical Biology and Signal Transduction, Rockefeller University, New York, NY 10065, USA
- Tri-Institutional PhD Program in Chemical Biology, New York, NY 10065, USA
| | - Yuanhuang Chen
- Laboratory of Chemical Biology and Signal Transduction, Rockefeller University, New York, NY 10065, USA
- Tri-Institutional PhD Program in Chemical Biology, New York, NY 10065, USA
| | - Victoria R Saca
- Laboratory of Chemical Biology and Signal Transduction, Rockefeller University, New York, NY 10065, USA
- Tri-Institutional PhD Program in Chemical Biology, New York, NY 10065, USA
| | - Emilie Ceraudo
- Laboratory of Chemical Biology and Signal Transduction, Rockefeller University, New York, NY 10065, USA
| | - Yu Chen
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Thomas P Sakmar
- Laboratory of Chemical Biology and Signal Transduction, Rockefeller University, New York, NY 10065, USA
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Rezzani R, Favero G, Cominelli G, Pinto D, Rinaldi F. Skin Aging and the Upcoming Role of Ferroptosis in Geroscience. Int J Mol Sci 2024; 25:8238. [PMID: 39125810 PMCID: PMC11311626 DOI: 10.3390/ijms25158238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 07/25/2024] [Accepted: 07/26/2024] [Indexed: 08/12/2024] Open
Abstract
The skin is considered the most important organ system in mammals, and as the population ages, it is important to consider skin aging and anti-aging therapeutic strategies. Exposure of the skin to various insults induces significant changes throughout our lives, differentiating the skin of a young adult from that of an older adult. These changes are caused by a combination of intrinsic and extrinsic aging. We report the interactions between skin aging and its metabolism, showing that the network is due to several factors. For example, iron is an important nutrient for humans, but its level increases with aging, inducing deleterious effects on cellular functions. Recently, it was discovered that ferroptosis, or iron-dependent cell death, is linked to aging and skin diseases. The pursuit of new molecular targets for ferroptosis has recently attracted attention. Prevention of ferroptosis is an effective therapeutic strategy for the treatment of diseases, especially in old age. However, the pathological and biological mechanisms underlying ferroptosis are still not fully understood, especially in skin diseases such as melanoma and autoimmune diseases. Only a few basic studies on regulated cell death exist, and the challenge is to turn the studies into clinical applications.
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Affiliation(s)
- Rita Rezzani
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, 25123 Brescia, Italy; (G.F.); (G.C.)
- Interdipartimental University Center of Research “Adaption and Regeneration of Tissues and Organs (ARTO)”, University of Brescia, 25123 Brescia, Italy; (D.P.); (F.R.)
- Italian Society for the Study of Orofacial Pain (Società Italiana Studio Dolore Orofacciale—SISDO), 25123 Brescia, Italy
| | - Gaia Favero
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, 25123 Brescia, Italy; (G.F.); (G.C.)
- Interdipartimental University Center of Research “Adaption and Regeneration of Tissues and Organs (ARTO)”, University of Brescia, 25123 Brescia, Italy; (D.P.); (F.R.)
| | - Giorgia Cominelli
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, 25123 Brescia, Italy; (G.F.); (G.C.)
| | - Daniela Pinto
- Interdipartimental University Center of Research “Adaption and Regeneration of Tissues and Organs (ARTO)”, University of Brescia, 25123 Brescia, Italy; (D.P.); (F.R.)
- Human Microbiome Advanced Project Institute, 20129 Milan, Italy
| | - Fabio Rinaldi
- Interdipartimental University Center of Research “Adaption and Regeneration of Tissues and Organs (ARTO)”, University of Brescia, 25123 Brescia, Italy; (D.P.); (F.R.)
- Human Microbiome Advanced Project Institute, 20129 Milan, Italy
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3
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Hlača N, Vičić M, Kaštelan M, Dekanić A, Prpić-Massari L. Analysis of granulysin expression in vitiligo and halo-nevus. Sci Rep 2024; 14:16580. [PMID: 39020008 PMCID: PMC11254913 DOI: 10.1038/s41598-024-67494-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 07/11/2024] [Indexed: 07/19/2024] Open
Abstract
Vitiligo and halo nevus are immune-mediated skin diseases that have a similar pathogenesis and involve cellular cytotoxicity mechanisms that are not yet fully understood. In this study, we investigated the expression patterns of the cytolytic molecule granulysin (GNLY) in different cytotoxic cells in skin samples of vitiligo and halo nevus. Skin biopsies were taken from perilesional and lesional skin of ten vitiligo patients, eight patients with halo nevus and ten healthy controls. We analysed the expression of GNLY by immunohistochemistry in CD8+ and CD56+ NK cells. A significantly higher accumulation of GNLY+, CD8+ GNLY+ and fewer CD56+ GNLY+ cells was found in the lesional skin of vitiligo and halo nevus than in the healthy skin. These cells were localised in the basal epidermis and papillary dermis, suggesting that GNLY may be involved in the immune response against melanocytes. Similarly, but to a lesser extent, upregulation of GNLY+ and CD8+ GNLY+ cells was observed in the perilesional skin of vitiligo and halo nevus compared to healthy controls. In this study, we demonstrated for the first time an increased expression of CD8+ GNLY+ T lymphocytes and CD56+ GNLY+ NK cells in lesions of vitiligo and halo nevus, indicating the role of GNLY in the pathogenesis of both diseases.
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Affiliation(s)
- Nika Hlača
- Department of Dermatovenerology, Faculty of Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Krešimirova 42, 51000, Rijeka, Croatia
| | - Marijana Vičić
- Department of Dermatovenerology, Faculty of Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Krešimirova 42, 51000, Rijeka, Croatia.
| | - Marija Kaštelan
- Department of Dermatovenerology, Faculty of Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Krešimirova 42, 51000, Rijeka, Croatia
| | - Andrea Dekanić
- Department of Pathology, Faculty of Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Krešimirova 42, 51000, Rijeka, Croatia
| | - Larisa Prpić-Massari
- Department of Dermatovenerology, Faculty of Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Krešimirova 42, 51000, Rijeka, Croatia
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4
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Zeng L, Yang K, Yu G, Hao W, Zhu X, Ge A, Chen J, Sun L. Advances in research on immunocyte iron metabolism, ferroptosis, and their regulatory roles in autoimmune and autoinflammatory diseases. Cell Death Dis 2024; 15:481. [PMID: 38965216 PMCID: PMC11224426 DOI: 10.1038/s41419-024-06807-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Revised: 05/26/2024] [Accepted: 06/03/2024] [Indexed: 07/06/2024]
Abstract
Autoimmune diseases commonly affect various systems, but their etiology and pathogenesis remain unclear. Currently, increasing research has highlighted the role of ferroptosis in immune regulation, with immune cells being a crucial component of the body's immune system. This review provides an overview and discusses the relationship between ferroptosis, programmed cell death in immune cells, and autoimmune diseases. Additionally, it summarizes the role of various key targets of ferroptosis, such as GPX4 and TFR, in immune cell immune responses. Furthermore, the release of multiple molecules, including damage-associated molecular patterns (DAMPs), following cell death by ferroptosis, is examined, as these molecules further influence the differentiation and function of immune cells, thereby affecting the occurrence and progression of autoimmune diseases. Moreover, immune cells secrete immune factors or their metabolites, which also impact the occurrence of ferroptosis in target organs and tissues involved in autoimmune diseases. Iron chelators, chloroquine and its derivatives, antioxidants, chloroquine derivatives, and calreticulin have been demonstrated to be effective in animal studies for certain autoimmune diseases, exerting anti-inflammatory and immunomodulatory effects. Finally, a brief summary and future perspectives on the research of autoimmune diseases are provided, aiming to guide disease treatment strategies.
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Affiliation(s)
- Liuting Zeng
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Graduate School of Peking Union Medical College, Nanjing, China.
| | - Kailin Yang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, China.
- Psychosomatic laboratory, Department of Psychiatry, Daqing Hospital of Traditional Chinese Medicine, Daqing, China.
| | - Ganpeng Yu
- People's Hospital of Ningxiang City, Ningxiang, China
| | - Wensa Hao
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | | | - Anqi Ge
- The First Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Junpeng Chen
- Psychosomatic laboratory, Department of Psychiatry, Daqing Hospital of Traditional Chinese Medicine, Daqing, China.
- Department of Physiology, School of Medicine, University of Louisville, Louisville, KY, USA.
- College of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan, China.
| | - Lingyun Sun
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Graduate School of Peking Union Medical College, Nanjing, China.
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.
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5
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Chen J, Wang Y, Dai W, Xu X, Ni Q, Yi X, Kang P, Ma J, Wu L, Li C, Li S. Oxidative stress-induced hypermethylation and low expression of ANXA2R: Novel insights into the dysfunction of melanocytes in vitiligo. J Dermatol Sci 2024; 114:115-123. [PMID: 38806323 DOI: 10.1016/j.jdermsci.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 01/30/2024] [Accepted: 02/27/2024] [Indexed: 05/30/2024]
Abstract
BACKGROUND Vitiligo is a skin disorder with melanocyte destruction caused by complex interplay between multiple genetic and environmental factors. Recent studies have suggested DNA methylation is involved in the melanocyte damage, but the underlying mechanism remains unknown. OBJECTIVE To explore the abnormal DNA methylation patterns in vitiligo lesional and nonlesional skin, and the mechanism of DNA methylation involved in vitiligo pathogenesis. METHODS Initially, the genome-wide aberrant DNA methylation profiles in lesional and nonlesional skin of vitiligo were detect via Illumina methylation EPIC 850k Beadchip. Subsequently, a comprehensive analysis was conduct to investigate the genomic characteristics of differentially methylated regions (DMRs). Furthermore, the effects of key aberrant methylated genes on cell apoptosis and function of both melanocytes and keratinocytes were further identified and validated by western bloting, ELISA, and immunofluorescence. RESULTS Compared with nonlesional skins, we discovered 79 significantly differentially methylated CpG sites in vitiligo lesions. These DMRs were mainly located in the gene body and the TS1500 region. Annexin A2 receptor (ANXA2R), a crucial gene in cell apoptosis, was hypermethylated in vitiligo lesions. Furthermore, we showed that ANXA2R displayed hypermethylation and low expression levels in both keratinocytes and melanocytes of vitiligo patients, and the hypermethylated-triggered downregulation of ANXA2R under oxidative stress induced melanocyte apoptosis, and inhibited the secretion of stem cell factor (SCF) from keratinocytes thus impaired the survival of melanocytes. CONCLUSIONS Our study illustrates the DNA methylation modification in vitiligo, and further demonstrates the molecular mechanism of hypermethylated ANXA2R in the dysfunction of melanocytes under oxidative stress.
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Affiliation(s)
- Jiaxi Chen
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Yinghan Wang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Wei Dai
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Xinyuan Xu
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Qingrong Ni
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Xiuli Yi
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Pan Kang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Jingjing Ma
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Lili Wu
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China
| | - Chunying Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China.
| | - Shuli Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi, China.
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Jalili C, Abbasi A, Rahmani-Kukia N, Andarzi S, Kakebaraie S, Zamir Nasta T. The relationship between aflatoxin B1 with the induction of extrinsic/intrinsic pathways of apoptosis and the protective role of taraxasterol in TM3 leydig cell line. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 276:116316. [PMID: 38615640 DOI: 10.1016/j.ecoenv.2024.116316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 03/25/2024] [Accepted: 04/09/2024] [Indexed: 04/16/2024]
Abstract
Aflatoxins B1 (AFB1) a dangerous type of aflatoxin, poses a serious threat to human health. Meanwhile, Taraxasterol, a bioactive compound in dandelion, exhibits strong anti-inflammatory and antioxidant activity. Therefore, the aim of this study was to investigate the impact of AFB1 on the intrinsic and extrinsic pathways of apoptosis, as well as evaluate the protective role of taraxasterol in the TM3 Leydig cell line. Cell viability was evaluated using an MTT assay, measuring the effects of 3.6 µM AFB1 and varying concentrations of taraxasterol. Expression levels of Caspase 3,8, and 9 were analyzed with RT-qPCR, and flow cytometry was used to assess cell cycle progression and apoptotic alterations. The findings of this study demonstrated that exposure to 3.6 µM of AFB1 resulted in an upregulation of Caspase 3 and Caspase 9 expression, indicating an activation of apoptotic pathways in TM3 cells. Additionally, the analysis of apoptosis revealed a significant increase in cellular apoptosis at this AFB1 concentration. However, when TM3 cells were exposed to 5 µM of taraxasterol, a downregulation of Caspase 3 and Caspase 9 expression was observed, suggesting a protective effect against apoptosis. Moreover, the apoptotic rate in TM3 cells was reduced in the presence of 5 µM of taraxasterol. Consequently, this study highlights the potential of taraxasterol as a protective agent against AFB1-induced apoptosis and suggest its potential application in regulating cell survival and apoptosis-related processes. Further investigations are necessary to elucidate the underlying mechanisms and evaluate the clinical implications of taraxasterol in the context of fertility disorders and other conditions associated with AFB1 exposure.
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Affiliation(s)
- Cyrus Jalili
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R, Iran
| | - Ardeshir Abbasi
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Nasim Rahmani-Kukia
- Department of Biochemistry, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Salar Andarzi
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Seyran Kakebaraie
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R, Iran
| | - Touraj Zamir Nasta
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R, Iran.
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7
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Hirobe T. Role of Dermal Factors Involved in Regulating the Melanin and Melanogenesis of Mammalian Melanocytes in Normal and Abnormal Skin. Int J Mol Sci 2024; 25:4560. [PMID: 38674144 PMCID: PMC11049857 DOI: 10.3390/ijms25084560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/13/2024] [Accepted: 04/14/2024] [Indexed: 04/28/2024] Open
Abstract
Mammalian melanin is produced in melanocytes and accumulated in melanosomes. Melanogenesis is supported by many factors derived from the surrounding tissue environment, such as the epidermis, dermis, and subcutaneous tissue, in addition to numerous melanogenesis-related genes. The roles of these genes have been fully investigated and the molecular analysis has been performed. Moreover, the role of paracrine factors derived from epidermis has also been studied. However, the role of dermis has not been fully studied. Thus, in this review, dermis-derived factors including soluble and insoluble components were overviewed and discussed in normal and abnormal circumstances. Dermal factors play an important role in the regulation of melanogenesis in the normal and abnormal mammalian skin.
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Affiliation(s)
- Tomohisa Hirobe
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
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Zhao Y, Ge K, Cheng Y, Zhang RZ. Bioinformatic Analysis of Genes Associated with Autophagy in Vitiligo. Indian J Dermatol 2024; 69:123-131. [PMID: 38841253 PMCID: PMC11149808 DOI: 10.4103/ijd.ijd_655_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024] Open
Abstract
Background As vitiligo progresses, autophagy becomes more and more important. Objectives To validate potential genes associated with autophagy in vitiligo through bioinformatics analysis and experimental testing. Materials and Methods Dataset GSE75819 of mRNA expression profiles was obtained from GEO. After data normalisation, gene set enrichment analyse enrichment analysis and abundance analysis of infiltrating immune cells were performed. A list of autophagy-related differentially expressed genes (ARDEGs) associated with vitiligo was generated using R software. Protein-protein interaction (PPI) analysis, correlation analysis, and enrichment analysis on gene ontology (GO) and Kyoto encyclopaedia of genes and genome (KEGG) pathways were conducted on the ARDEG data. The microRNAs associated with hub genes were predicted using the TargetScan database. Finally, RNA expression of 10 hub genes and Western blotting (WB) of autophagy pathway factors were further verified. Results From the lesions of 15 vitiligo patients, 44 ARDEGs were identified. PPI analysis demonstrated that these ARDEGs interacted with each other. GO and KEGG analyses of ARDEGs revealed that several enriched terms were associated with macroautophagy (biological process), vacuolar membranes (cellular components), cysteine-type peptidase activity (molecular function), and autophagy in animals, neurodegeneration-multiple disease pathways, and apoptosis. In vitiligo lesions, qRT-PCR and sequencing validation analyses showed expression levels of CCL2, RB1CC1, TP53, and ATG9A that were consistent with bioinformatic analysis of the microarray. WB results also showed that autophagy-related proteins were differentially expressed. Conclusions Forty-four potential ARDEGs were identified in vitiligo by bioinformatic analysis. Vitiligo may be affected by autophagy regulation through CCL2, RB1CC1, TP53, and ATG9A.
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Affiliation(s)
- Yilu Zhao
- From the Department of Dermatology, The First Affiliated Hospital of Bengbu Medical University, Bengbu Medical University, Bengbu, Anhui, People’s Republic of China
- Department of Dermatology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, People’s Republic of China
| | - Kang Ge
- Jiaxing Key Discipiline of Medcine Dermatology and Venereology (2023-FC-006), The Affiliated Hospital of Jiaxing University, The First Hospital of Jiaxing, Jiaxing, People’s Republic of China
| | - Yan Cheng
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - Ru-zhi Zhang
- Department of Dermatology and STD, The Second Affiliated Hospital of Wannan Medical College, Wuhu, Anhui, People’s Republic of China
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Guttman-Yassky E, Del Duca E, Da Rosa JC, Bar J, Ezzedine K, Ye Z, He W, Hyde C, Hassan-Zahraee M, Yamaguchi Y, Peeva E. Improvements in immune/melanocyte biomarkers with JAK3/TEC family kinase inhibitor ritlecitinib in vitiligo. J Allergy Clin Immunol 2024; 153:161-172.e8. [PMID: 37777018 DOI: 10.1016/j.jaci.2023.09.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 08/29/2023] [Accepted: 09/22/2023] [Indexed: 10/02/2023]
Abstract
BACKGROUND Vitiligo is an autoimmune depigmenting disorder with no effective and safe treatments. Its pathogenesis is not fully elucidated. OBJECTIVE This substudy of a randomized, double-blind, placebo-controlled phase 2b trial (NCT03715829) evaluated effects of ritlecitinib, an oral JAK3/TEC family kinase inhibitor, on skin and blood biomarkers in participants with nonsegmental vitiligo (NSV). METHODS Sixty-five adults with NSV participated in the substudy and received daily treatment for 24 weeks with placebo (n = 14) or ritlecitinib with or without a 4-week loading dose: 200 (loading dose)/50 mg (n = 13), 100/50 mg (n = 12), 50 mg (n = 11), 30 mg (n = 8), or 10 mg (n = 6). Skin (lesional and nonlesional) biopsy samples were obtained at baseline and at 4 and 24 weeks. Changes from baseline to weeks 4 and 24 in skin and blood molecular and cellular biomarkers were evaluated by RNA sequencing, quantitative real-time PCR, proteomic analysis, and flow cytometry. RESULTS Ritlecitinib-treated groups showed downregulation of immune biomarkers and upregulation of melanocyte-related markers at weeks 4 and 24 compared to baseline and/or placebo. Significant reductions were seen in CD3+/CD8+ T-cell infiltrates, with significant increases in melanocyte markers (tyrosinase; Melan-A) in NSV lesions in the 50 mg ritlecitinib groups (both P < .05). There was significant, dose-dependent downregulation in T-cell activation, NK, cytotoxic, and regulatory markers in lesional skin (IL-2, IL2-RA, IL-15, CCR7, CD5, CRTAM, NCR1, XCL1, KIR3DL1, FASLG, KLRD; P < .05). TH1 and TH2 markers were also downregulated in lesional skin and blood in a dose-dependent manner (P < .05). Changes in immune biomarkers correlated with clinical response. CONCLUSIONS Ritlecitinib significantly downregulated proinflammatory biomarkers and increased melanocyte products in skin and blood of participants with NSV, suggesting its potential in treatment. Ritlecitinib-mediated changes positively correlated with clinical response.
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Affiliation(s)
- Emma Guttman-Yassky
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, Mount Sinai, New York, NY.
| | - Ester Del Duca
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, Mount Sinai, New York, NY
| | - Joel Correa Da Rosa
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, Mount Sinai, New York, NY
| | - Jonathan Bar
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, Mount Sinai, New York, NY; Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Khaled Ezzedine
- Hôpital Henri Mondor and Université Paris-Est Créteil, EpiDermE-Epidemiology in Dermatology and Evaluation of Therapeutics, Creteil, France
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10
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Lin Y, Ding Y, Wu Y, Yang Y, Liu Z, Xiang L, Zhang C. The underestimated role of mitochondria in vitiligo: From oxidative stress to inflammation and cell death. Exp Dermatol 2024; 33:e14856. [PMID: 37338012 DOI: 10.1111/exd.14856] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/24/2023] [Accepted: 05/31/2023] [Indexed: 06/21/2023]
Abstract
Vitiligo is an acquired depigmentary disorder characterized by the depletion of melanocytes in the skin. Mitochondria shoulder multiple functions in cells, such as production of ATP, maintenance of redox balance, initiation of inflammation and regulation of cell death. Increasing evidence has implicated the involvement of mitochondria in the pathogenesis of vitiligo. Mitochondria alteration will cause the abnormalities of mitochondria functions mentioned above, ultimately leading to melanocyte loss through various cell death modes. Nuclear factor erythroid 2-related factor 2 (Nrf2) plays a critical role in mitochondrial homeostasis, and the downregulation of Nrf2 in vitiligo may correlate with mitochondria damage, making both mitochondria and Nrf2 promising targets in treatment of vitiligo. In this review, we aim to discuss the alterations of mitochondria and its role in the pathogenesis of vitiligo.
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Affiliation(s)
- Yi Lin
- Department of Dermatology, Huashan Hospital Fudan University, Shanghai, China
| | - Yuecen Ding
- Department of Dermatology, Huashan Hospital Fudan University, Shanghai, China
| | - Yue Wu
- Department of Dermatology, Huashan Hospital Fudan University, Shanghai, China
| | - Yiwen Yang
- Department of Dermatology, Huashan Hospital Fudan University, Shanghai, China
| | - Ziqi Liu
- Department of Dermatology, Huashan Hospital Fudan University, Shanghai, China
| | - Leihong Xiang
- Department of Dermatology, Huashan Hospital Fudan University, Shanghai, China
| | - Chengfeng Zhang
- Department of Dermatology, Huashan Hospital Fudan University, Shanghai, China
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11
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Białczyk A, Wełniak A, Kamińska B, Czajkowski R. Oxidative Stress and Potential Antioxidant Therapies in Vitiligo: A Narrative Review. Mol Diagn Ther 2023; 27:723-739. [PMID: 37737953 PMCID: PMC10590312 DOI: 10.1007/s40291-023-00672-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2023] [Indexed: 09/23/2023]
Abstract
Vitiligo is a chronic skin disorder characterised by the loss of melanocytes and subsequent skin depigmentation. Although many theories have been proposed in the literature, none alone explains the pathogenesis of vitiligo. Oxidative stress has been identified as a potential factor in the pathogenesis of vitiligo. A growing body of evidence suggests that antioxidant therapies may offer a promising approach to managing this condition. This review summarises the potential mechanisms of oxidative stress and the types of melanocyte death in vitiligo. We also provide a brief overview of the most commonly studied antioxidants. Melanocytes in vitiligo are thought to be damaged by an accumulation of reactive oxygen species to destroy the structural and functional integrity of their DNA, lipids, and proteins. Various causes, including exogenous and endogenous stress factors, an imbalance between prooxidants and antioxidants, disruption of antioxidant pathways, and gene polymorphisms, lead to the overproduction of reactive oxygen species. Although necroptosis, pyroptosis, ferroptosis, and oxeiptosis are newer types of cell death that may contribute to the pathophysiology of vitiligo, apoptosis remains the most studied cell death mechanism in vitiligo. According to studies, vitamin E helps to treat lipid peroxidation of the skin caused by psoralen ultra-violet A treatment. In addition, Polypodium leucotomos increased the efficacy of psoralen ultra-violet A or narrow-band ultraviolet B therapy. Our review provides valuable insights into the potential role of oxidative stress in pathogenesis and antioxidant-based supporting therapies in treating vitiligo, offering a promising avenue for further research and the development of effective treatment strategies.
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Affiliation(s)
- Aleksandra Białczyk
- Students' Scientific Club of Dermatology, Department of Dermatology and Venerology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University, 9 Skłodowskiej-Curie Street, 85-094, Bydgoszcz, Poland.
| | - Adam Wełniak
- Students' Scientific Club of Dermatology, Department of Dermatology and Venerology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University, 9 Skłodowskiej-Curie Street, 85-094, Bydgoszcz, Poland
| | - Barbara Kamińska
- Students' Scientific Club of Dermatology, Department of Dermatology and Venerology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University, 9 Skłodowskiej-Curie Street, 85-094, Bydgoszcz, Poland
| | - Rafał Czajkowski
- Department of Dermatology and Venerology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
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12
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Kaushik H, Kumar V, Parsad D. Mitochondria-Melanocyte cellular interactions: An emerging mechanism of vitiligo pathogenesis. J Eur Acad Dermatol Venereol 2023; 37:2196-2207. [PMID: 36897230 DOI: 10.1111/jdv.19019] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 02/07/2023] [Indexed: 03/11/2023]
Abstract
Mitochondria has emerged as a potential modulator of melanocyte function other than just meeting its cellular ATP demands. Mitochondrial DNA defects are now an established cause of maternal inheritance diseases. Recent cellular studies have highlighted the mitochondrial interaction with other cellular organelles that lead to disease conditions such as in Duchenne muscular dystrophy, where defective mitochondria was found in melanocytes of these patients. Vitiligo, a depigmentory ailment of the skin, is another such disorder whose pathogenesis is now found to be associated with mitochondria. The complete absence of melanocytes at the lesioned site in vitiligo is a fact; however, the precise mechanism of this destruction is still undefined. In this review we have tried to discuss and link the emerging facts of mitochondrial function or its inter- and intra-organellar communications in vitiligo pathogenesis. Mitochondrial close association with melanosomes, molecular involvement in melanocyte-keratinocyte communication and melanocyte survival are new paradigm of melanogenesis that could ultimately account for vitiligo. This definitely adds the new dimensions to our understanding of vitiligo, its management and designing of future mitochondrial targeted therapy for vitiligo.
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Affiliation(s)
- Hitaishi Kaushik
- Department of Dermatology, Venereology & Leprology, PGIMER, Chandigarh, 160012, India
| | - Vinod Kumar
- Department of Dermatology, Venereology & Leprology, PGIMER, Chandigarh, 160012, India
| | - Davinder Parsad
- Department of Dermatology, Venereology & Leprology, PGIMER, Chandigarh, 160012, India
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13
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Wang J, Wang D, Si G. Efficacy and safety of Chinese patent medicine compound preparation combined with routine treatment in vitiligo: A Bayesian network meta-analysis. Medicine (Baltimore) 2023; 102:e35327. [PMID: 37832097 PMCID: PMC10578774 DOI: 10.1097/md.0000000000035327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 08/31/2023] [Indexed: 10/15/2023] Open
Abstract
BACKGROUND AND PURPOSE Treating vitiligo in clinical practice is challenging. Furthermore, oral drugs used in Western medicine have considerable side effects and are unsuitable for long-term treatment. In contrast, Chinese patent medicines (CPMs) are more suitable for long-term oral vitiligo treatment, but medical evidence of their efficacy and safety is lacking. Therefore, in this study, the efficacy and safety of CPMs were evaluated and ranked using a Bayesian network meta-analysis. METHODS Seven Chinese and English databases were searched for all relevant articles published up to February 2023. The Bayesian network meta-analysis method was used to analyze the extracted data to evaluate efficacy and safety. RESULTS Six common CPMs for treating vitiligo were selected in our study, and 48 targeted articles and 4446 patients were included. This study showed that Qubai Babuqi tablets (QT) were the most effective for short-term treatment of vitiligo, and that vitiligo capsules or pills (VCP) were the most effective for long-term treatment, together with compound Quchong Banjiuju pills (QP). In terms of surface area under the cumulative ranking curve (SUCRA) values, the order of efficacy of each treatment was as follows: QT (92.18%) > Taohong Qingxue pills (TP) (63.81%) > VCP (55.53%) > QP (50.72%) > Bailing tablets or capsules (BTC) (49.01%) > Baishi pills (BP) (35.69%)>routine therapy (RT) (3.1%) in terms of total effective rate and QT (92.05%) > VCP (71.50%) > QP (66.60%) > TP (42.95%) > BTC (39.66%) > BP (36.60%)>RT (0.6%) in terms of improvement rate. In addition, the safety of the 6 CPMs did not significantly differ in terms of adverse effects. The SUCRA values indicated that QT performed slightly worse than other drugs. DISCUSSION In treating vitiligo, QT is most effective but only suitable for short-term administration owing to its poor safety. VCP and QP could be used as first-choice long-term medications. TP may positively affect repigmentation in patients with limited lesion areas.
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Affiliation(s)
- Jianfeng Wang
- Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
| | - Dingding Wang
- Jining Hospital of Traditional Chinese Medicine, Jining, Shandong, China
| | - Guomin Si
- Department of Traditional Chinese Medicine, Shandong Provincial Hospital, Jinan, Shandong, China
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Maclary ET, Wauer R, Phillips B, Brown A, Boer EF, Samani AM, Shapiro MD. An allelic series at the EDNRB2 locus controls diverse piebalding patterns in the domestic pigeon. PLoS Genet 2023; 19:e1010880. [PMID: 37862332 PMCID: PMC10588866 DOI: 10.1371/journal.pgen.1010880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/25/2023] [Indexed: 10/22/2023] Open
Abstract
Variation in pigment patterns within and among vertebrate species reflects underlying changes in cell migration and function that can impact health, reproductive success, and survival. The domestic pigeon (Columba livia) is an exceptional model for understanding the genetic changes that give rise to diverse pigment patterns, as selective breeding has given rise to hundreds of breeds with extensive variation in plumage color and pattern. Here, we map the genetic architecture of a suite of pigmentation phenotypes known as piebalding. Piebalding is characterized by patches of pigmented and non-pigmented feathers, and these plumage patterns are often breed-specific and stable across generations. Using a combination of quantitative trait locus mapping in F2 laboratory crosses and genome-wide association analysis, we identify a locus associated with piebalding across many pigeon breeds. This shared locus harbors a candidate gene, EDNRB2, that is a known regulator of pigment cell migration, proliferation, and survival. We discover multiple distinct haplotypes at the EDNRB2 locus in piebald pigeons, which include a mix of protein-coding, noncoding, and structural variants that are associated with depigmentation in specific plumage regions. These results identify a role for EDNRB2 in pigment patterning in the domestic pigeon, and highlight how repeated selection at a single locus can generate a diverse array of stable and heritable pigment patterns.
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Affiliation(s)
- Emily T. Maclary
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, United States of America
| | - Ryan Wauer
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, United States of America
| | - Bridget Phillips
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, United States of America
| | - Audrey Brown
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, United States of America
| | - Elena F. Boer
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, United States of America
| | - Atoosa M. Samani
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, United States of America
| | - Michael D. Shapiro
- School of Biological Sciences, University of Utah, Salt Lake City, Utah, United States of America
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15
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Bzioueche H, Boniface K, Drullion C, Marchetti S, Chignon-Sicard B, Sormani L, Rocchi S, Seneschal J, Passeron T, Tulic MK. Impact of house dust mite in vitiligo skin: environmental contribution to increased cutaneous immunity and melanocyte detachment. Br J Dermatol 2023; 189:312-327. [PMID: 37140010 DOI: 10.1093/bjd/ljad148] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 04/27/2023] [Accepted: 04/28/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Vitiligo is an autoimmune skin disorder characterized by loss of melanocytes. Protease-mediated disruption of junctions between keratinocytes and/or keratinocyte intrinsic dysfunction may directly contribute to melanocyte loss. House dust mite (HDM), an environmental allergen with potent protease activity, contributes to respiratory and gut disease but also to atopic dermatitis and rosacea. OBJECTIVES To verify if HDM can contribute to melanocyte detachment in vitiligo and if so, by which mechanism(s). METHODS Using primary human keratinocytes, human skin biopsies from healthy donors and patients with vitiligo, and 3D reconstructed human epidermis, we studied the effect of HDM on cutaneous immunity, tight and adherent junction expression and melanocyte detachment. RESULTS HDM increased keratinocyte production of vitiligo-associated cytokines and chemokines and increased expression of toll-like receptor (TLR)-4. This was associated with increased in situ matrix-metalloproteinase (MMP)-9 activity, reduced cutaneous expression of adherent protein E-cadherin, increased soluble E-cadherin in culture supernatant and significantly increased number of suprabasal melanocytes in the skin. This effect was dose-dependent and driven by cysteine protease Der p1 and MMP-9. Selective MMP-9 inhibitor, Ab142180, restored E-cadherin expression and inhibited HDM-induced melanocyte detachment. Keratinocytes from patients with vitiligo were more sensitive to HDM-induced changes than healthy keratinocytes. All results were confirmed in a 3D model of healthy skin and in human skin biopsies. CONCLUSIONS Our results highlight that environmental mite may act as an external source of pathogen-associated molecular pattern molecules in vitiligo and topical MMP-9 inhibitors may be useful therapeutic targets. Whether HDM contributes to the onset of flares in vitiligo remains to be tested in carefully controlled trials.
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Affiliation(s)
- Hanene Bzioueche
- Université Côte d'Azur, INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France
| | - Katia Boniface
- Bordeaux University, CNRS, ImmunoConcept, UMR 5164, 33000 Bordeaux, France
| | - Claire Drullion
- Bordeaux University, CNRS, ImmunoConcept, UMR 5164, 33000 Bordeaux, France
| | - Sandrine Marchetti
- Université Côte d'Azur, INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France
| | | | | | - Stéphane Rocchi
- Université Côte d'Azur, INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France
| | - Julien Seneschal
- Bordeaux University, CNRS, ImmunoConcept, UMR 5164, 33000 Bordeaux, France
- Department of Dermatology and Pediatric Dermatology and National Reference Center for Rare Skin Disorders, Hôpital Saint-André, Bordeaux, France
| | - Thierry Passeron
- Université Côte d'Azur, INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France
| | - Meri K Tulic
- Université Côte d'Azur, INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France
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Maclary ET, Wauer R, Phillips B, Brown A, Boer EF, Samani AM, Shapiro MD. An allelic series at the EDNRB2 locus controls diverse piebalding patterns in the domestic pigeon. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.26.550625. [PMID: 37546953 PMCID: PMC10402103 DOI: 10.1101/2023.07.26.550625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Variation in pigment patterns within and among vertebrate species reflects underlying changes in cell migration and function that can impact health, reproductive success, and survival. The domestic pigeon (Columba livia) is an exceptional model for understanding the genetic changes that give rise to diverse pigment patterns, as selective breeding has given rise to hundreds of breeds with extensive variation in plumage color and pattern. Here, we map the genetic architecture of a suite of pigmentation phenotypes known as piebalding. Piebalding is characterized by patches of pigmented and non-pigmented feathers, and these plumage patterns are often breed-specific and stable across generations. Using a combination of quantitative trait locus mapping in F2 laboratory crosses and genome-wide association analysis, we identify a locus associated with piebalding across many pigeon breeds. This shared locus harbors a candidate gene, EDNRB2, that is a known regulator of pigment cell migration, proliferation, and survival. We discover multiple distinct haplotypes at the EDNRB2 locus in piebald pigeons, which include a mix of protein-coding, noncoding, and structural variants that are associated with depigmentation in specific plumage regions. These results identify a role for EDNRB2 in pigment patterning in the domestic pigeon, and highlight how repeated selection at a single locus can generate a diverse array of stable and heritable pigment patterns.
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Affiliation(s)
- Emily T. Maclary
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Ryan Wauer
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Bridget Phillips
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Audrey Brown
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Elena F. Boer
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Atoosa M. Samani
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Michael D. Shapiro
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
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17
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Touni AA, Shivde RS, Echuri H, Abdel-Aziz RTA, Abdel-Wahab H, Kundu RV, Le Poole IC. Melanocyte-keratinocyte cross-talk in vitiligo. Front Med (Lausanne) 2023; 10:1176781. [PMID: 37275386 PMCID: PMC10235633 DOI: 10.3389/fmed.2023.1176781] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 04/27/2023] [Indexed: 06/07/2023] Open
Abstract
Vitiligo is a common acquired pigmentary disorder that presents as progressive loss of melanocytes from the skin. Epidermal melanocytes and keratinocytes are in close proximity to each other, forming a functional and structural unit where keratinocytes play a pivotal role in supporting melanocyte homeostasis and melanogenesis. This intimate relationship suggests that keratinocytes might contribute to ongoing melanocyte loss and subsequent depigmentation. In fact, keratinocyte dysfunction is a documented phenomenon in vitiligo. Keratinocyte apoptosis can deprive melanocytes from growth factors including stem cell factor (SCF) and other melanogenic stimulating factors which are essential for melanocyte function. Additionally, keratinocytes control the mobility/stability phases of melanocytes via matrix metalloproteinases and basement membrane remodeling. Hence keratinocyte dysfunction may be implicated in detachment of melanocytes from the basement membrane and subsequent loss from the epidermis, also potentially interfering with repigmentation in patients with stable disease. Furthermore, keratinocytes contribute to the autoimmune insult in vitiligo. Keratinocytes express MHC II in perilesional skin and may present melanosomal antigens in the context of MHC class II after the pigmented organelles have been transferred from melanocytes. Moreover, keratinocytes secrete cytokines and chemokines including CXCL-9, CXCL-10, and IL-15 that amplify the inflammatory circuit within vitiligo skin and recruit melanocyte-specific, skin-resident memory T cells. In summary, keratinocytes can influence vitiligo development by a combination of failing to produce survival factors, limiting melanocyte adhesion in lesional skin, presenting melanocyte antigens and enhancing the recruitment of pathogenic T cells.
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Affiliation(s)
- Ahmed Ahmed Touni
- Department of Dermatology, Faculty of Medicine, Minia University, Minia, Egypt
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Rohan S. Shivde
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Harika Echuri
- Department of Dermatology, Emory University, Atlanta, GA, United States
| | | | - Hossam Abdel-Wahab
- Department of Dermatology, Faculty of Medicine, Minia University, Minia, Egypt
| | - Roopal V. Kundu
- Department of Dermatology, Faculty of Medicine, Minia University, Minia, Egypt
| | - I. Caroline Le Poole
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
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18
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Ng CY, Chan YP, Chiu YC, Shih HP, Lin YN, Chung PH, Huang JY, Chen HK, Chung WH, Ku CL. Targeting the elevated IFN-γ in vitiligo patients by human anti- IFN-γ monoclonal antibody hampers direct cytototoxicity in melanocyte. J Dermatol Sci 2023:S0923-1811(23)00113-5. [PMID: 37221109 DOI: 10.1016/j.jdermsci.2023.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 04/08/2023] [Accepted: 04/23/2023] [Indexed: 05/25/2023]
Abstract
BACKGROUND Vitiligo is an autoimmune disease that progressively destroys melanocytes in the skin, resulting in patchy disfiguring depigmentation. The direct pathological effect of IFN-γ, CXCL10 to the melanocytes in vitiligo has been reported, but there are contradictory results to which cytokine exerts the critical cytotoxic effect on melanocytes. OBJECTIVE The overarching goal was to study the direct toxicity of highly expressed cytokine in vitiligo skin lesions to melanocytes. METHODS We obtained the interstitial fluid analyte from lesion and non-lesion skin of vitiligo patients and healthy control and sent for high sensitivity multiplex cytokine panel. We further performed functional study to identify the direct toxicity effect of the highly expressed cytokines. RESULTS We found a significant elevation of IFN-γ, CXCL9, CXCL10, CXCL11 in the vitiligo skin. Ex vivo melanocyte studies support the direct role of IFN-γ per se in melanocyte cell loss, increased oxidative stress and melanogenesis disruption. Interestingly, we found that IFN-γ regulated cell death through oxidative stress-related ferroptosis cell death, which may initiate autoimmunity in vitiligo. In contrast to blocking selected cell death pathway, our in vitro study supports the rescue effect of human anti-IFN-γ monoclonal antibody 2A6Q to IFN-γ induced cell death, oxidative stress, and loss of function in melanocytes by interrupting IFN-γ signaling, which may be a potential therapeutic option for vitiligo. CONCLUSION This study further confirms the direct of toxicity effect of IFN-γ per se towards melanocyte in vitiligo skin and the potential utility of human anti-IFN-γ monoclonal antibody in treating vitiligo.
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Affiliation(s)
- Chau Yee Ng
- Vitiligo Clinic and Pigment Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Department of Dermatology and Aesthetic Medicine Center, Jen Ai Hospital, Taichung, Taiwan; School of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Pei Chan
- Vitiligo Clinic and Pigment Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Laboratory of Human Immunology and Infectious Diseases, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Yen-Chuan Chiu
- Vitiligo Clinic and Pigment Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Laboratory of Human Immunology and Infectious Diseases, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Han-Po Shih
- Laboratory of Human Immunology and Infectious Diseases, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - You-Ning Lin
- Laboratory of Human Immunology and Infectious Diseases, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | | | | | | | - Wen-Hung Chung
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Department of Dermatology and Aesthetic Medicine Center, Jen Ai Hospital, Taichung, Taiwan; School of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Lung Ku
- Laboratory of Human Immunology and Infectious Diseases, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan; Center for Molecular and Clinical Immunology, Chang Gung University, Taoyuan, Taiwan; Division of Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.
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19
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Nagatani K, Abe Y, Homma T, Fujii J, Suzuki T. Copper chelation by d-penicillamine alleviates melanocyte death induced by rhododendrol without inhibiting tyrosinase. Biochem Biophys Res Commun 2023; 663:71-77. [PMID: 37119768 DOI: 10.1016/j.bbrc.2023.04.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 04/19/2023] [Indexed: 05/01/2023]
Abstract
Oxidative metabolism of rhododendrol (RD), a skin-whitening ingredient, by tyrosinase has caused leukoderma in a certain population of Japanese consumers. Toxic RD metabolites and reactive oxygen species are proposed causes for the melanocyte death. However, the mechanism by which reactive oxygen species are produced during RD metabolism remains elusive. Some phenolic compounds are known to act as suicide substrates for tyrosinase, resulting in release of a copper atom and hydrogen peroxide during its inactivation. We hypothesized that RD may be a suicide substrate for tyrosinase and that the released copper atom may be responsible for the melanocyte death through hydroxyl radical production. In line with this hypothesis, human melanocytes incubated with RD showed an irreversible decrease in tyrosinase activity and underwent cell death. A copper chelator, d-penicillamine, markedly suppressed the RD-dependent cell death without significantly affecting the tyrosinase activity. Peroxide levels in RD-treated cells were not affected by d-penicillamine. Given the unique enzymatic properties of tyrosinase, we conclude that RD acted as a suicide substrate and resulted in release of a copper atom and hydrogen peroxide, which would collectively impair melanocyte viability. These observations further imply that copper chelation may alleviate chemical leukoderma caused by other compounds.
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Affiliation(s)
- Kei Nagatani
- Department of Dermatology, Yamagata University Faculty of Medicine, 2-2-2 Iidanishi, Yamagata, Yamagata, 990-9585, Japan; Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, 2-2-2 Iidanishi, Yamagata, Yamagata, 990-9585, Japan.
| | - Yuko Abe
- Department of Dermatology, Yamagata University Faculty of Medicine, 2-2-2 Iidanishi, Yamagata, Yamagata, 990-9585, Japan.
| | - Takujiro Homma
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, 2-2-2 Iidanishi, Yamagata, Yamagata, 990-9585, Japan.
| | - Junichi Fujii
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, 2-2-2 Iidanishi, Yamagata, Yamagata, 990-9585, Japan.
| | - Tamio Suzuki
- Department of Dermatology, Yamagata University Faculty of Medicine, 2-2-2 Iidanishi, Yamagata, Yamagata, 990-9585, Japan.
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Chang WL, Ko CH. The Role of Oxidative Stress in Vitiligo: An Update on Its Pathogenesis and Therapeutic Implications. Cells 2023; 12:cells12060936. [PMID: 36980277 PMCID: PMC10047323 DOI: 10.3390/cells12060936] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/13/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Vitiligo is an autoimmune skin disorder caused by dysfunctional pigment-producing melanocytes which are attacked by immune cells. Oxidative stress is considered to play a crucial role in activating consequent autoimmune responses related to vitiligo. Melanin synthesis by melanocytes is the main intracellular stressor, producing reactive oxygen species (ROS). Under normal physiological conditions, the antioxidative nuclear factor erythroid 2-related factor 2 (Nrf2) pathway functions as a crucial mediator for cells to resist oxidative stress. In pathological situations, such as with antioxidant defects or under inflammation, ROS accumulate and cause cell damage. Herein, we summarize events at the cellular level under excessive ROS in vitiligo and highlight exposure to melanocyte-specific antigens that trigger immune responses. Such responses lead to functional impairment and the death of melanocytes, which sequentially increase melanocyte cytotoxicity through both innate and adaptive immunity. This report provides new perspectives and advances our understanding of interrelationships between oxidative stress and autoimmunity in the pathogenesis of vitiligo. We describe progress with targeted antioxidant therapy, with the aim of providing potential therapeutic approaches.
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Affiliation(s)
- Wei-Ling Chang
- International Ph.D. Program for Cell Therapy and Regeneration Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
| | - Chi-Hsiang Ko
- School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei 110, Taiwan
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21
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Gallo D, Baci D, Kustrimovic N, Lanzo N, Patera B, Tanda ML, Piantanida E, Mortara L. How Does Vitamin D Affect Immune Cells Crosstalk in Autoimmune Diseases? Int J Mol Sci 2023; 24:ijms24054689. [PMID: 36902117 PMCID: PMC10003699 DOI: 10.3390/ijms24054689] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/16/2023] [Accepted: 02/25/2023] [Indexed: 03/05/2023] Open
Abstract
Vitamin D is a secosteroid hormone that is highly involved in bone health. Mounting evidence revealed that, in addition to the regulation of mineral metabolism, vitamin D is implicated in cell proliferation and differentiation, vascular and muscular functions, and metabolic health. Since the discovery of vitamin D receptors in T cells, local production of active vitamin D was demonstrated in most immune cells, addressing the interest in the clinical implications of vitamin D status in immune surveillance against infections and autoimmune/inflammatory diseases. T cells, together with B cells, are seen as the main immune cells involved in autoimmune diseases; however, growing interest is currently focused on immune cells of the innate compartment, such as monocytes, macrophages, dendritic cells, and natural killer cells in the initiation phases of autoimmunity. Here we reviewed recent advances in the onset and regulation of Graves' and Hashimoto's thyroiditis, vitiligo, and multiple sclerosis in relation to the role of innate immune cells and their crosstalk with vitamin D and acquired immune cells.
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Affiliation(s)
- Daniela Gallo
- Endocrine Unit, Department of Medicine and Surgery, University of Insubria, ASST dei Sette Laghi, 21100 Varese, Italy
| | - Denisa Baci
- Immunology and General Pathology Laboratory, Department of Biotechnology and Life Sciences, University of Insubria, 21100 Varese, Italy
- Molecular Cardiology Laboratory, IRCCS-Policlinico San Donato, San Donato Milanese, 20097 Milan, Italy
| | - Natasa Kustrimovic
- Center for Translational Research on Autoimmune and Allergic Disease—CAAD, Università del Piemonte Orientale, 28100 Novara, Italy
| | - Nicola Lanzo
- Endocrine Unit, Department of Medicine and Surgery, University of Insubria, ASST dei Sette Laghi, 21100 Varese, Italy
| | - Bohdan Patera
- Endocrine Unit, Department of Medicine and Surgery, University of Insubria, ASST dei Sette Laghi, 21100 Varese, Italy
| | - Maria Laura Tanda
- Endocrine Unit, Department of Medicine and Surgery, University of Insubria, ASST dei Sette Laghi, 21100 Varese, Italy
| | - Eliana Piantanida
- Endocrine Unit, Department of Medicine and Surgery, University of Insubria, ASST dei Sette Laghi, 21100 Varese, Italy
| | - Lorenzo Mortara
- Immunology and General Pathology Laboratory, Department of Biotechnology and Life Sciences, University of Insubria, 21100 Varese, Italy
- Correspondence:
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22
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Zhang M, Xia T, Lin F, Yu J, Yang Y, Lei W, Zhang T. Vitiligo: An immune disease and its emerging mesenchymal stem cell therapy paradigm. Transpl Immunol 2023; 76:101766. [PMID: 36464219 DOI: 10.1016/j.trim.2022.101766] [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: 08/10/2022] [Revised: 08/31/2022] [Accepted: 11/28/2022] [Indexed: 12/02/2022]
Abstract
Melanocyte damage, innate immune response, adaptive immune response, and immune inflammatory microenvironment disorders are involved in the development of the immunological pathogenic mechanism of vitiligo. Mesenchymal stem cells are considered an ideal type of cells for the treatment of vitiligo owing to their low immunogenicity, lower rates of transplant rejection, and ability to secrete numerous growth factors, exosomes, and cytokines in vivo. The regulation of signaling pathways related to oxidative stress and immune imbalance in the immunological pathogenesis of vitiligo can improve the immune microenvironment of tissue injury sites. In addition, co-transplantation with melanocytes can reverse the progression of vitiligo. Therefore, continuous in-depth research on the immunopathogenic mechanism involved in this disease and mesenchymal stem cell-based therapy is warranted for the treatment of vitiligo in the future.
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Affiliation(s)
- Meng Zhang
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Tingting Xia
- Department of Dermatology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Fengqin Lin
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Jiang Yu
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China; The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Ying Yang
- Department of Dermatology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Wei Lei
- Department of Dermatology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Tao Zhang
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China; The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China; Department of Dermatology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China.
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23
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Zhang J, Liang N, Cao Y, Li M. Differentially Expressed Circular RNAs and Their Therapeutic Mechanism in Non-segmental Vitiligo Patients Treated With Methylprednisolone. Front Med (Lausanne) 2022; 9:839066. [PMID: 35652072 PMCID: PMC9149005 DOI: 10.3389/fmed.2022.839066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 03/30/2022] [Indexed: 01/31/2023] Open
Abstract
Vitiligo is characterized by chronic skin depigmentation arising from the autoimmune destruction of epidermal melanocytes. Systemic corticosteroid therapy is an effective immunosuppressive treatment for progressive generalized vitiligo. Circular RNAs (circRNAs) play various roles in diseases. In systemic corticosteroid therapy, however, how circRNAs function to counter vitiligo is still unclear. In this article, we identified the differentially expressed circRNAs (DEcircRNAs) in vitiligo patients before and after the administration of methylprednisolone. Total RNA was extracted from the peripheral blood of patients with vitiligo, and samples were hybridized into a circRNA array. A total of 375 (51 upregulated and 324 downregulated) circRNAs were differentially expressed. Box, scatter, volcano, and heatmap plots were generated to classify the samples. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were performed on DEcircRNAs. These DEcircRNAs were enriched in vitiligo-related biological processes, such as ferroptosis, organic substance transport, protein metabolic process, and cellular component organization or biogenesis. Two different databases, TargetScan and miRanda, were used to predict circRNA/miRNA interactions. Several circRNA/miRNA interactions were involved in ferroptosis. These circRNAs might serve as therapeutic targets in the treatment of vitiligo.
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Affiliation(s)
- Jiaqi Zhang
- Department of Dermatology, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou, China
| | - Ning Liang
- Department of Dermatology, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou, China
| | - Yan Cao
- Department of Dermatology, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou, China
- *Correspondence: Yan Cao,
| | - Min Li
- Department of Dermatology, Children’s Hospital of Nanjing Medical University, Nanjing, China
- Min Li,
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24
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Marchioro HZ, Castro CCSD, Fava VM, Sakiyama PH, Dellatorre G, Miot HA. Update on the pathogenesis of vitiligo. An Bras Dermatol 2022; 97:478-490. [PMID: 35643735 PMCID: PMC9263675 DOI: 10.1016/j.abd.2021.09.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/15/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022] Open
Abstract
Vitiligo is a complex disease whose pathogenesis results from the interaction of genetic components, metabolic factors linked to cellular oxidative stress, melanocyte adhesion to the epithelium, and immunity (innate and adaptive), which culminate in aggression against melanocytes. In vitiligo, melanocytes are more sensitive to oxidative damage, leading to the increased expression of proinflammatory proteins such as HSP70. The lower expression of epithelial adhesion molecules, such as DDR1 and E-cadherin, facilitates damage to melanocytes and exposure of antigens that favor autoimmunity. Activation of the type 1-IFN pathway perpetuates the direct action of CD8+ cells against melanocytes, facilitated by regulatory T-cell dysfunction. The identification of several genes involved in these processes sets the stage for disease development and maintenance. However, the relationship of vitiligo with environmental factors, psychological stress, comorbidities, and the elements that define individual susceptibility to the disease are a challenge to the integration of theories related to its pathogenesis.
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Wu X, Jin S, Yang Y, Lu X, Dai X, Xu Z, Zhang C, Xiang LF. Altered expression of ferroptosis markers and iron metabolism reveals a potential role of ferroptosis in vitiligo. Pigment Cell Melanoma Res 2022; 35:328-341. [PMID: 35218147 DOI: 10.1111/pcmr.13032] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 01/02/2022] [Accepted: 02/16/2022] [Indexed: 12/14/2022]
Abstract
Oxidative stress is one of the triggering factors for vitiligo, which leads to melanocyte (MC) destruction in vitiligo lesions. Ferroptosis, which is characterized by iron-dependent increase in oxidative stress and lipid peroxidation, has been widely explored in numerous diseases, whereas whether ferroptosis plays a role in MC loss of vitiligo remains to be elucidated. Quantitative real-time PCR and western blot analysis were used to determine the expression of ferroptosis markers in vitiligo patients. Immunonephelometry and electrochemiluminescence were performed to analyze iron status. Reactive oxygen species (ROS), Fe2+ , and lipid ROS were assessed by flow cytometry. The expression of ferroptosis markers was significantly altered in the epidermis of vitiligo patients. Iron deficiency was revealed in the blood of patients. Erastin reduced cell viability and led to oxidative stress, iron overload as well as lipid peroxide accumulation in human epidermal MCs in vitro. Altered expression of ferroptosis markers and inhibition of melanin synthesis in MCs were induced by erastin, which was attenuated by N-acetyl-L-cysteine (NAC) pretreatment or post-treatment in vitro. In conclusion, ferroptosis might take place during the process of vitiligo. Erastin could induce ferroptosis in human epidermal MCs and NAC could protect MCs from ferroptosis in vitro.
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Affiliation(s)
- Xiuyi Wu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Shanglin Jin
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yiwen Yang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaoli Lu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaoxi Dai
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Zhongyi Xu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Chengfeng Zhang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Leihong Flora Xiang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
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26
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Kang P, Chen J, Zhang W, Guo N, Yi X, Cui T, Chen J, Yang Y, Wang Y, Du P, Ye Z, Li B, Li C, Li S. Oxeiptosis: a novel pathway of melanocytes death in response to oxidative stress in vitiligo. Cell Death Dis 2022; 8:70. [PMID: 35177586 PMCID: PMC8854565 DOI: 10.1038/s41420-022-00863-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/18/2022] [Accepted: 02/01/2022] [Indexed: 11/09/2022]
Abstract
Vitiligo is a cutaneous depigmenting autoimmune disease caused by the extensive destruction of epidermal melanocytes. Convincing data has defined a critical role for oxidative stress in the pathogenesis of vitiligo. Oxeiptosis is a caspase-independent cell death modality that was reportedly triggered by oxidative stress and operative in pathogen clearance. However, whether oxeiptosis exists in oxidative stress-induced melanocytes demise in vitiligo remains undetermined. In the present study, we initially found that other cell death modalities might exist in addition to the well-recognized apoptosis and necroptosis in H2O2-treated melanocytes. Furthermore, AIFM1 was found to be dephosphorylated at Ser116 in oxidative stress-induced melanocytes death, which was specific to oxeiptosis. Moreover, KEAP1 and PGAM5, upstream of the AIFM1 in oxeiptosis, were found to operate in melanocytic death. Subsequently, the KEAP1-PGAM5-AIFM1 signaling pathway was proved to be involved in oxidative stress-triggered melanocytes demise through the depletion of KEAP1 and PGAM5. Altogether, our study indicated that oxeiptosis might occur in melanocytes death under oxidative stress and contribute to the pathogenesis of vitiligo.
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Affiliation(s)
- Pan Kang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Jianru Chen
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Weigang Zhang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Ningning Guo
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Xiuli Yi
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Tingting Cui
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Jiaxi Chen
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Yuqi Yang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Yinghan Wang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Pengran Du
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Zhubiao Ye
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Baizhang Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Chunying Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China
| | - Shuli Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, No. 127 of West Changle Road, Xi'an, Shaanxi, 710032, China.
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27
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The Role of Oxidative Stress in the Pathogenesis of Vitiligo: A Culprit for Melanocyte Death. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:8498472. [PMID: 35103096 PMCID: PMC8800607 DOI: 10.1155/2022/8498472] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 01/01/2022] [Accepted: 01/03/2022] [Indexed: 12/11/2022]
Abstract
Vitiligo is a common chronic acquired pigmentation disorder characterized by loss of pigmentation. Among various hypotheses proposed for the pathogenesis of vitiligo, oxidative stress-induced immune response that ultimately leads to melanocyte death remains most widely accepted. Oxidative stress which causes elevated levels of reactive oxygen species (ROS) can lead to dysfunction of molecules and organelles, triggering further immune response, and ultimately melanocyte death. In recent years, a variety of cell death modes have been studied, including apoptosis, autophagy and autophagic cell death, ferroptosis, and other novel modes of death, which will be discussed in this review in detail. Oxidative stress is also strongly linked to these modes of death. Under oxidative stress, ROS could induce autophagy by activating the Nrf2 antioxidant pathway of melanocytes. However, persistent stimulation of ROS might eventually lead to excessive activation of Nrf2 antioxidant pathway, which in turn will inactivate autophagy. Moreover, ferroptosis may be triggered by oxidative-related transcriptional production, including ARE, the positive feedback loop related to p62, and the reduced activity and expression of GPX4. Therefore, it is reasonable to infer that these modes of death are involved in the oxidative stress response, and that oxidative stress also acts as an initiator for various modes of death through some complex mechanisms. In this study, we aim to summarize the role of oxidative stress in vitiligo and discuss the corresponding mechanisms of interaction between various modes of cell death and oxidative stress. These findings may provide new ideas for exploring the pathogenesis and potential therapeutic targets of vitiligo.
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Du Y, Zhao HC, Zhu HC, Jin Y, Wang L. Ferroptosis is involved in the anti-tumor effect of lycorine in renal cell carcinoma cells. Oncol Lett 2021; 22:781. [PMID: 34594422 PMCID: PMC8456505 DOI: 10.3892/ol.2021.13042] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 07/14/2021] [Indexed: 12/13/2022] Open
Abstract
Renal cell carcinoma (RCC) is a most common malignant tumor in the genitourinary system. Studies have shown that Lycorine has promising anticancer activities with minor side effects. However, the effect of lycorine on the proliferation of RCC cells and its underlying anti-tumor mechanism have not yet been fully elucidated. The human renal cancer cell lines 786-O, A498 and Caki-1 were cultured and treated with different concentrations of lycorine or ferrostatin-1, a ferroptosis inhibitor. Cell viability and colony formation assays were used to measure cell proliferation. The 5-, 12- and 15-HETE hydroxyeicosatetraenoic acid (HETE) and MDA levels, as well as the reduced to oxidized glutathione (GHS/GSSG) ratio, were analyzed. Western blot analysis was used to detect the expression of glutathione peroxidase 4 (GPX4) and acyl-CoA synthetase long chain family member 4 (ACSL4), which are key markers of ferroptosis. Transmission electron microscopy was used to observe the morphological features associated with ferroptosis. Lycorine was found to inhibit the proliferation of RCC cells. After lycorine treatment, the expression levels of GPX4 in RCC cells decreased, whereas those of ACSL4 increased. Lycorine induced the expression of 5-HETE, 12-HETE, 15-HETE and MDA in RCC cells, and reduced the GSH/GSSG ratio. In addition, ferrostatin-1 could prevent lycorine-induced ferroptosis in RCC cells.
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Affiliation(s)
- Yang Du
- Department of Urology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430000, P.R. China
| | - Hong-Chao Zhao
- Department of Urology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430000, P.R. China
| | - Heng-Cheng Zhu
- Department of Urology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430000, P.R. China
| | - Yao Jin
- Department of Surgery, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430000, P.R. China
| | - Lei Wang
- Department of Urology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430000, P.R. China
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