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Kim NH, Kim HJ, Lee AY. Aquaporin-3 Downregulation in Vitiligo Keratinocytes Increases Oxidative Stress of Melanocytes. Biomol Ther (Seoul) 2023; 31:648-654. [PMID: 37818624 PMCID: PMC10616513 DOI: 10.4062/biomolther.2023.112] [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: 06/13/2023] [Revised: 07/25/2023] [Accepted: 08/08/2023] [Indexed: 10/12/2023] Open
Abstract
Oxidative stress-induced melanocyte apoptosis is linked to the immune system and plays a critical role in the pathogenesis of vitiligo. Aquaporin-3 (AQP3), which is downregulated in vitiligo keratinocytes, regulates intracellular H2O2 accumulation. However, the role of AQP3 in oxidative stress is uncertain in vitiligo. This study investigated the effect of downregulated AQP3 on oxidative stress in vitiligo using lesional and non-lesional skin specimen sets from vitiligo patients and primary cultured adult normal human epidermal keratinocytes, with or without downregulation and overexpression of AQP3 in the presence or absence of H2O2 treatment. The levels of nuclear factor E2-related factor 2 (NRF2) and/or its main target, NAD(P)H quinone dehydrogenase 1 (NQO-1), were lower in the lesional keratinocytes and cultured keratinocytes with AQP3 knockdown, but were increased in keratinocytes upon AQP3 overexpression. Ratios of NRF2 nuclear translocation and NQO-1 expression levels were further reduced in AQP3-knockdown keratinocytes following H2O2 treatment. The conditioned media from AQP3-knockdown keratinocytes treated with H2O2 contained higher concentrations of reactive oxygen species (ROS). Moreover, the number of viable melanocytes was reduced when the conditioned media were added to the culture media. Overall, AQP3 downregulation in the keratinocytes of patients with vitiligo can induce oxidative stress in neighboring melanocytes, leading to melanocyte death.
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Affiliation(s)
- Nan-Hyung Kim
- Department of Dermatology, Dongguk University School of Medicine, Goyang 10326, Republic of Korea
| | - Ha Jung Kim
- Department of Dermatology, Dongguk University School of Medicine, Goyang 10326, Republic of Korea
| | - Ai-Young Lee
- Department of Dermatology, Dongguk University School of Medicine, Goyang 10326, Republic of Korea
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Cui J, Qiu M, Liu Y, Liu Y, Tang Y, Teng X, Li S. Nano-selenium protects grass carp hepatocytes against 4-tert-butylphenol-induced mitochondrial apoptosis and necroptosis via suppressing ROS-PARP1 axis. FISH & SHELLFISH IMMUNOLOGY 2023; 135:108682. [PMID: 36924910 DOI: 10.1016/j.fsi.2023.108682] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 02/19/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
4-tert-butylphenol (4-tBP) is a monomer widely used in the synthesis of industrial chemicals, and posed a high risk to aquatic animals. Our study focused on toxic phenotype and mechanism of detoxification in grass carp hepatocytes (L8824) after 4-tBP-treatment. In this experiment, L8824 displayed hallmark phenotypes of apoptosis and necroptosis after 4-tBP exposure, as evidenced by changes in cell morphology, increased rates of apoptosis and necrosis, the loss of MMP, the accumulation of ROS, and changes in associated factors (PARP1, JNK, Bid, Bcl-2, Bax, AIFM1, CytC, Caspase 9, APAF1, Caspase 3, TNF-α, TNFR1, RIPK1, RIPK3, and MLKL). Furthermore, we found that 4-tBP-induced apoptosis and necroptosis were reversed by pretreating with N-Acetylcysteine (a ROS scavenger) and 3-Aminobenzamide (a PARP1 inhibitor), indicating that 4-tBP induced the onset of mitochondrial apoptosis and necroptosis in L8824 via activating ROS-PARP1 axis. Nano-selenium (Nano-Se) is a novel form of Se with a noteworthy antioxidant capacity. Here, Nano-Se was found to have preventive, therapeutic, and resistance effects on 4-tBP-induced L8824 apoptosis and necroptosis. Nano-Se co-treatment with 4-tBP was an optimal way to alleviate 4-tBP-induced apoptosis and necroptosis. We demonstrated for the first time that Nano-Se protected L8824 against 4-tBP-induced mitochondrial apoptosis and necroptosis through ROS-PARP1 pathway. This study will provide a new theoretical basis for 4-tBP toxicology researches and aquatic animal protection.
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Affiliation(s)
- Jiawen Cui
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Minna Qiu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yuhang Liu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yuhao Liu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - You Tang
- Digital Agriculture Key Discipline of Jilin Province, JiLin Agricultural Science and Technology University, Jilin, 132101, People's Republic of China
| | - Xiaohua Teng
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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Gamil H, Assaf M, Khater M, Fawzy M. Abnormal nuclear expression of aquaporin-3 in lesional and perilesional skin of vitiligo patients: A novel immunohistochemical finding. J Cosmet Dermatol 2023; 22:1063-1070. [PMID: 36437598 DOI: 10.1111/jocd.15518] [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: 09/13/2022] [Revised: 10/31/2022] [Accepted: 11/07/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Vitiligo is a skin disease characterized by a complex etiopathogenesis. Keratinocyte apoptosis may play a role in vitiligo pathogenesis. Aquaporin-3 (AQP-3) is an aqua-glyceroporin that controls keratinocyte proliferation and differentiation. AIM To assess the immunohistochemical expression of AQP-3 in lesional and perilesional skin of vitiligo patients compared to healthy control skin. METHODS A total of 20 patients with generalized non-segmental vitiligo and 20 age- and sex-matched healthy controls were included. Lesional and perilesional skin of vitiligo patients, as well as normal skin of control subjects, were biopsied. The immunohistochemical expression of AQP3 in the epidermis was examined. RESULTS Compared to control skin, both lesional and perilesional skin showed a significant reduction in the intensity of membranous staining of AQP-3 (p < 0.001, p = 0.002, respectively). Moreover, the membrano-cytoplasmic pattern of AQP-3 staining was significantly detected in 80% of lesions and 85% of perilesional biopsies, while it was absent in control skin (p < 0.001). Additionally, nuclear AQP-3 expression was significantly detected in 35% of lesions and 55% of perilesional biopsies, while it was not detected in control skin (p = 0.012, p < 0.001, respectively). No statistically significant difference was detected between lesional and perilesional skin. CONCLUSIONS To our knowledge, this is the first immunohistochemical research to show a significant abnormal nuclear expression of AQP-3 in lesional and perilesional skin of vitiligo patients. This abnormality may reflect impaired functions of AQP-3, leading to keratinocyte apoptosis with subsequent melanocyte death and development of vitiligo.
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Affiliation(s)
- Hend Gamil
- Department of Dermatology, Venereology & Andrology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Magda Assaf
- Department of Pathology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamad Khater
- Department of Dermatology, Venereology & Andrology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Manal Fawzy
- Department of Dermatology, Venereology & Andrology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Zhong B, Ling X, Meng J, Han Y, Zhang H, Liu Z, Chen J, Zhang H, Pan Z, Liu L. Hsa_circ_0001944 regulates apoptosis by regulating the binding of PARP1 and HuR in leukemia and malignant transformed cells induced by hydroquinone. ENVIRONMENTAL TOXICOLOGY 2023; 38:381-391. [PMID: 36448377 DOI: 10.1002/tox.23719] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 11/13/2022] [Accepted: 11/20/2022] [Indexed: 06/16/2023]
Abstract
Hydroquinone (HQ) is one of the major metabolites of benzene and can cause abnormal gene expression. It is a known carcinogen that alters cell cycle disruption and cell proliferation. However, its chemical mechanism remain a mystery. Circular RNAs (circRNAs) are a subtype of noncoding RNAs (ncRNAs) that play a variety of roles in biological processes. Hsa_circ_001944 expression was upregulated in 30 leukemia patients and HQ-induced malignant transformed TK6 cells. Hsa_circ_001944 silencing inhibited the growth of HQ-TK6 cells and halted the cell cycle. The silencing of hsa_circ_0001944 led to increased cell accumulation in G1 versus S phase, increased apoptosis in the sh1944 versus the shNC group, and increased levels of DNA damage (γ-H2AX), leading to cell cycle arrest. In summary, inhibition of hsa_circ_001944 restricted cell growth by inhibiting cell cycle arrest and induced growth of HQ-TK6 cells by modulating PARP1 expression. Hsa_circ_0001944 targeted HuR, which is a kind of RNA-binding protein, to control PARP1 expression via RNAinter, RBPmap, and RBPdb. Fluorescence in situ hybridization combined with immunofluorescent labeling and western blotting experiments showed that hsa_circ_001944 was able to dissociate HuR and PARP1 binding in HQ-TK6 cells, control PARP1 production, and ultimately alter the PARP1/H-Ras pathway.
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Affiliation(s)
- Bohuan Zhong
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Xiaoxuan Ling
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Jinxue Meng
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Yali Han
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Haiqiao Zhang
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Hospital Infection Management, Dongguan Maternal and Child Health Care Hospital, Dongguan, People's Republic of China
| | - Zhidong Liu
- Department of Occupational Disease, Huizhou Hospital for Occupational Disease Prevention and Treatment, Huizhou, People's Republic of China
| | - Jialong Chen
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - He Zhang
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Zhijie Pan
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
| | - Linhua Liu
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
- Department of Preventive Medicine, School of Public Health, Guangdong Medical University, Dongguan, People's Republic of China
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Romano-Lozano V, Cruz-Avelar A, Peralta-Pedrero M. [Translated article] Nuclear Factor Erythroid 2-Related Factor 2 in Vitiligo. ACTAS DERMO-SIFILIOGRAFICAS 2022. [DOI: 10.1016/j.ad.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Factor nuclear eritroide similar al factor 2 en el vitíligo. ACTAS DERMO-SIFILIOGRAFICAS 2022; 113:705-711. [DOI: 10.1016/j.ad.2022.02.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 02/11/2022] [Accepted: 02/22/2022] [Indexed: 01/17/2023] Open
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Zhang JZ, Abudoureyimu D, Wang M, Yu SR, Kang XJ. Association between celiac disease and vitiligo: A review of the literature. World J Clin Cases 2021; 9:10430-10437. [PMID: 35004975 PMCID: PMC8686139 DOI: 10.12998/wjcc.v9.i34.10430] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/25/2021] [Accepted: 10/20/2021] [Indexed: 02/06/2023] Open
Abstract
Celiac disease (CD) is an autoimmune intestinal disease caused by the intake of gluten-containing cereals and their products by individuals with genetic susceptibility genes. Vitiligo is a commonly acquired depigmentation of the skin; its clinical manifestation are skin patches caused by localized or generalized melanin deficiency. Both diseases have similar global incidence rates (approximately 1%) and are associated to similar diseases, including autoimmune bullous disease, inflammatory bowel disease, autoimmune thyroiditis, autoimmune gastritis, and type 1 diabetes. The relationship between CD and vitiligo has been reported in several studies, but their conclusions are inconsistent. Further, it has also been reported that a gluten-free diet (GFD) can improve the symptoms of immune-related skin diseases such as vitiligo. In this mini-review, we summarize and review the literature on the relationship between CD and vitiligo, assess the therapeutic significance of GFD for patients with vitiligo, and explore their possible physiopathology. We are hopeful that the information summarized here will assist physicians who treat patients with CD or vitiligo, thereby improving the prognosis.
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Affiliation(s)
- Jing-Zhan Zhang
- Department of Dermatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Key Laboratory of Dermatology Research, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
| | - Dilinuer Abudoureyimu
- Department of Dermatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Key Laboratory of Dermatology Research, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
| | - Man Wang
- Department of Gastroenterology, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
| | - Shi-Rong Yu
- Department of Dermatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Key Laboratory of Dermatology Research, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
| | - Xiao-Jing Kang
- Department of Dermatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Key Laboratory of Dermatology Research, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
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Xiong J, Yang J, Yan K, Guo J. Ginsenoside Rk1 protects human melanocytes from H 2O 2‑induced oxidative injury via regulation of the PI3K/AKT/Nrf2/HO‑1 pathway. Mol Med Rep 2021; 24:821. [PMID: 34558653 PMCID: PMC8485120 DOI: 10.3892/mmr.2021.12462] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 03/30/2021] [Indexed: 12/20/2022] Open
Abstract
Vitiligo is a cutaneous depigmentation disorder caused by melanocyte injury or aberrant functioning. Oxidative stress (OS) is considered to be a major cause of the onset and progression of vitiligo. Ginsenoside Rk1 (RK1), a major compound isolated from ginseng, has antioxidant activity. However, whether RK1 can protect melanocytes against oxidative injury remains unknown. The aim of the present study was to investigate the potential protective effect of RK1 against OS in the human PIG1 melanocyte cell line induced with hydrogen peroxide (H2O2), and to explore its underlying mechanism. PIG1 cells were pretreated with RK1 (0, 0.1, 0.2 and 0.4 mM) for 2 h followed by exposure to 1.0 mM H2O2 for 24 h. Cell viability and apoptosis were determined with Cell Counting Kit‑8 and flow cytometry assays, respectively. The activity levels of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH‑Px) were analyzed using ELISA kits. Protein expression levels, including Bax, caspase‑3, Bcl‑2, phosphorylated‑AKT, AKT, nuclear factor erythroid 2‑related factor 2 (Nrf2), heme oxygenase‑1 (HO‑1), cytosolic Nrf2 and nuclear Nrf2, were analyzed using western blot analysis. In addition, the expression and localization of Nrf2 were detected by immunofluorescence. RK1 treatment significantly improved cell viability, reduced the apoptotic rate and increased the activity levels of SOD, CAT and GSH‑Px in the PIG1 cell line exposed to H2O2. In addition, RK1 treatment notably induced Nrf2 nuclear translocation, increased the protein expression levels of Nrf2 and HO‑1, and the ratio of phosphorylated‑AKT to AKT in the PIG1 cells exposed to H2O2. Furthermore, LY294002 could reverse the protective effect of RK1 in melanocytes against oxidative injury. These data demonstrated that RK1 protected melanocytes from H2O2‑induced OS by regulating Nrf2/HO‑1 protein expression, which may provide evidence for the application of RK1 for the treatment of vitiligo.
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Affiliation(s)
- Jian Xiong
- Department of Dermatology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| | - Jianing Yang
- Department of Dermatology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| | - Kai Yan
- Department of Dermatology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
| | - Jing Guo
- Department of Dermatology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 610072, P.R. China
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Teng Y, Fan Y, Ma J, Lu W, Liu N, Chen Y, Pan W, Tao X. The PI3K/Akt Pathway: Emerging Roles in Skin Homeostasis and a Group of Non-Malignant Skin Disorders. Cells 2021; 10:cells10051219. [PMID: 34067630 PMCID: PMC8156939 DOI: 10.3390/cells10051219] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/07/2021] [Accepted: 05/10/2021] [Indexed: 12/20/2022] Open
Abstract
The phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway regulates cell proliferation, differentiation, and migration, along with angiogenesis and metabolism. Additionally, it could mediate skin development and homeostasis. There is much evidence to suggest that dysregulation of PI3K/Akt pathway is frequently associated with several human cutaneous malignancies like malignant melanoma (MM), basal cell carcinoma (BCC), and cutaneous squamous cell carcinoma (SCC), as well as their poor outcomes. Nevertheless, emerging roles of PI3K/Akt pathway cascade in a group of common non-malignant skin disorders including acne and psoriasis, among others, have been recognized. The enhanced understanding of dysfunction of PI3K/Akt pathway in patients with these non-malignant disorders has offered a solid foundation for the progress of updated therapeutic targets. This article reviews the latest advances in the roles of PI3K/Akt pathway and their targets in the skin homeostasis and progression of a wide range of non-malignant skin disorders and describes the current progress in preclinical and clinical researches on the involvement of PI3K/Akt pathway targeted therapies.
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Affiliation(s)
- Yan Teng
- Department of Dermatology, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou 310014, China; (Y.T.); (Y.F.); (J.M.); (W.L.)
| | - Yibin Fan
- Department of Dermatology, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou 310014, China; (Y.T.); (Y.F.); (J.M.); (W.L.)
| | - Jingwen Ma
- Department of Dermatology, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou 310014, China; (Y.T.); (Y.F.); (J.M.); (W.L.)
| | - Wei Lu
- Department of Dermatology, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou 310014, China; (Y.T.); (Y.F.); (J.M.); (W.L.)
| | - Na Liu
- Graduate School of Bengbu Medical College, Bengbu 233000, China; (N.L.); (Y.C.)
| | - Yingfang Chen
- Graduate School of Bengbu Medical College, Bengbu 233000, China; (N.L.); (Y.C.)
| | - Weili Pan
- Department of Dermatology, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou 310014, China; (Y.T.); (Y.F.); (J.M.); (W.L.)
- Correspondence: (W.P.); (X.T.)
| | - Xiaohua Tao
- Department of Dermatology, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou 310014, China; (Y.T.); (Y.F.); (J.M.); (W.L.)
- Correspondence: (W.P.); (X.T.)
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Lee AY. Skin Pigmentation Abnormalities and Their Possible Relationship with Skin Aging. Int J Mol Sci 2021; 22:ijms22073727. [PMID: 33918445 PMCID: PMC8038212 DOI: 10.3390/ijms22073727] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/24/2021] [Accepted: 04/01/2021] [Indexed: 12/13/2022] Open
Abstract
Skin disorders showing abnormal pigmentation are often difficult to manage because of their uncertain etiology or pathogenesis. Abnormal pigmentation is a common symptom accompanying aging skin. The association between skin aging and skin pigmentation abnormalities can be attributed to certain inherited disorders characterized by premature aging and abnormal pigmentation in the skin and some therapeutic modalities effective for both. Several molecular mechanisms, including oxidative stress, mitochondrial DNA mutations, DNA damage, telomere shortening, hormonal changes, and autophagy impairment, have been identified as involved in skin aging. Although each of these skin aging-related mechanisms are interconnected, this review examined the role of each mechanism in skin hyperpigmentation or hypopigmentation to propose the possible association between skin aging and pigmentation abnormalities.
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Affiliation(s)
- Ai-Young Lee
- Department of Dermatology, College of Medicine, Dongguk University Ilsan Hospital, 814 Siksa-dong, Ilsandong-gu, Goyang-si 410-773, Gyeonggi-do, Korea
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11
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Chen J, Li S, Li C. Mechanisms of melanocyte death in vitiligo. Med Res Rev 2021; 41:1138-1166. [PMID: 33200838 PMCID: PMC7983894 DOI: 10.1002/med.21754] [Citation(s) in RCA: 102] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/16/2020] [Accepted: 11/01/2020] [Indexed: 12/12/2022]
Abstract
Vitiligo is an autoimmune depigment disease results from extensive melanocytes destruction. The destruction of melanocyte is thought to be of multifactorial causation. Genome-wide associated studies have identified single-nucleotide polymorphisms in a panel of susceptible loci as risk factors in melanocyte death. But vitiligo onset can't be solely attributed to a susceptive genetic background. Oxidative stress triggered by elevated levels of reactive oxygen species accounts for melanocytic molecular and organelle dysfunction, a minority of melanocyte demise, and melanocyte-specific antigens exposure. Of note, the self-responsive immune function directly contributes to the bulk of melanocyte deaths in vitiligo. The aberrantly heightened innate immunity, type-1-skewed T helper, and incompetent regulatory T cells tip the balance toward autoreaction and CD8+ cytotoxic T lymphocytes finally execute the killing of melanocytes, possibly alarmed by resident memory T cells. In addition to the well-established apoptosis and necrosis, we discuss several death modalities like oxeiptosis, ferroptosis, and necroptosis that are probably employed in melanocyte destruction. This review focuses on the various mechanisms of melanocytic death in vitiligo pathogenesis to demonstrate a panorama of that. We hope to provide new insights into vitiligo pathogenesis and treatment strategies by the review.
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Affiliation(s)
- Jianru Chen
- Department of DermatologyXijing hospital, Fourth Military Medical UniversityXi'anShannxiChina
| | - Shuli Li
- Department of DermatologyXijing hospital, Fourth Military Medical UniversityXi'anShannxiChina
| | - Chunying Li
- Department of DermatologyXijing hospital, Fourth Military Medical UniversityXi'anShannxiChina
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12
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Li XS, Tang XY, Su W, Li X. Vitexin protects melanocytes from oxidative stress via activating MAPK-Nrf2/ARE pathway. Immunopharmacol Immunotoxicol 2020; 42:594-603. [PMID: 33045867 DOI: 10.1080/08923973.2020.1835952] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Vitiligo is the most common type of depigmented skin disease. Cellular oxidative stress caused by reactive oxygen species (ROS) has been implicated in the pathogenesis of vitiligo. Nuclear factor E2-related factor 2 (Nrf2)/antioxidant response element (ARE) pathway plays an important role in melanocytes against hydrogen peroxide (H2O2) induced oxidative stress. In addition, vitexin may protect vitiligo by inhibiting oxidative stress and inflammation. OBJECTIVE In the present study, we aimed to investigate the antioxidant effect of vitexin-activated mitogen-activated protein kinase (MAPK)-Nrf2/ARE axis in vitiligo. METHODS MTT assay identified cell viability of human melanocyte PIG1. Cell apoptosis was evaluated by flow cytometry. Gene and protein expression levels were analyzed by quantitative real-time PCR (qPCR) and Western blotting. Enzyme-linked immunosorbent assay (ELISA) was used to detect the expressions of inflammatory factors and ROS production. RESULTS Vitexin inhibited H2O2-induced melanocyte apoptosis and promoted cell proliferation. Moreover, vitexin decreased expression of interleukin-1β (IL-1β), IL-17A, and ROS in melanocytes induced by H2O2. Subsequently, activation of MAPK-Nrf2/ARE signaling was readily induced by vitexin treatment, as evidenced by the upregulation of antioxidant genes including heme oxygenase 1 (HO-1) and superoxide dismutase (SOD). Knockdown of Nrf2 reversed the protective effect of vitexin on H2O2-induced melanocytes. And, knockdown of Nrf2 increased the expression of IL-1β, IL-17A and ROS, and reduced HO-1 and SOD expression. CONCLUSIONS Vitexin protected melanocytes from oxidative stress by activating MAPK-Nrf2/ARE signaling pathway. Our results suggested that the role of the Nrf2/ARE axis in the antioxidant defense of melanocytes, and the potential therapeutic strategy for vitiligo.
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Affiliation(s)
- Xiao-Sha Li
- Department of Dermatology, the Second Affiliated Hospital, Hunan University of Chinese Medicine, Changsha, P. R. China
| | - Xue-Yong Tang
- Department of Dermatology, the Second Affiliated Hospital, Hunan University of Chinese Medicine, Changsha, P. R. China
| | - Wei Su
- Department of Dermatology, the Second Affiliated Hospital, Hunan University of Chinese Medicine, Changsha, P. R. China
| | - Xin Li
- Hunan Provincal Key Laboratory of Diagnostic in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, P. R. China
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Liu LP, Li YM, Guo NN, Li S, Ma X, Zhang YX, Gao Y, Huang JL, Zheng DX, Wang LY, Xu H, Hui L, Zheng YW. Therapeutic Potential of Patient iPSC-Derived iMelanocytes in Autologous Transplantation. Cell Rep 2020; 27:455-466.e5. [PMID: 30970249 DOI: 10.1016/j.celrep.2019.03.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 02/02/2019] [Accepted: 03/13/2019] [Indexed: 12/16/2022] Open
Abstract
Induced pluripotent stem cells (iPSCs) are a promising melanocyte source as they propagate indefinitely and can be established from patients. However, the in vivo functions of human iPSC-derived melanocytes (hiMels) remain unknown. Here, we generated hiMels from vitiligo patients using a three-dimensional system with enhanced differentiation efficiency, which showed characteristics of human epidermal melanocytes with high sequence similarity and involved in multiple vitiligo-associated signaling pathways. A modified hair follicle reconstitution assay in vivo showed that MITF+PAX3+TYRP1+ hiMels were localized in the mouse hair bulb and epidermis and produced melanin up to 7 weeks after transplantation, whereas MITF+PAX3+TYRP1- hiMelanocyte stem cells integrated into the bulge-subbulge regions. Overall, these data demonstrate the long-term functions of hiMels in vivo to reconstitute pigmented hair follicles and to integrate into normal regions for both mature melanocytes and melanocyte stem cells, providing an alternative source of personalized cellular therapy for depigmentation.
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Affiliation(s)
- Li-Ping Liu
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Yu-Mei Li
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China.
| | - Ning-Ning Guo
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Shu Li
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Xiaolong Ma
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Science, Shanghai 200031, China
| | - Yi-Xuan Zhang
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Yimeng Gao
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Science, Shanghai 200031, China
| | - Jian-Ling Huang
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Dong-Xu Zheng
- Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Lu-Yuan Wang
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Hui Xu
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Department of Dermatology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China
| | - Lijian Hui
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Science, Shanghai 200031, China; School of Life Science and Technology, Shanghai Tech University, Shanghai 201210, China; Stem Cell and Regenerative Medicine Innovation Academy, Beijing 100101, China.
| | - Yun-Wen Zheng
- Institute of Regenerative Medicine, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, Jiangsu 212001, China; Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan; School of Medicine, Yokohama City University, Yokohama 236-0004, Japan.
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14
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Functional Role of p53 in the Regulation of Chemical-Induced Oxidative Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6039769. [PMID: 32190175 PMCID: PMC7066401 DOI: 10.1155/2020/6039769] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 02/03/2020] [Accepted: 02/11/2020] [Indexed: 12/12/2022]
Abstract
The nuclear transcription factor p53, discovered in 1979, has a broad range of biological functions, primarily the regulation of apoptosis, the cell cycle, and DNA repair. In addition to these canonical functions, a growing body of evidence suggests that p53 plays an important role in regulating intracellular redox homeostasis through transcriptional and nontranscriptional mechanisms. Oxidative stress induction and p53 activation are common responses to chemical exposure and are suggested to play critical roles in chemical-induced toxicity. The activation of p53 can exert either prooxidant or antioxidant activity, depending on the context. In this review, we discuss the functional role of p53 in regulating chemical-induced oxidative stress, summarize the potential signaling pathways involved in p53's regulation of chemically mediated oxidative stress, and propose issues that should be addressed in future studies to improve understanding of the relationship between p53 and chemical-induced oxidative stress.
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15
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Fabris AL, Nunes AV, Schuch V, de Paula-Silva M, Rocha G, Nakaya HI, Ho PL, Silveira ELV, Farsky SHP. Hydroquinone exposure alters the morphology of lymphoid organs in vaccinated C57Bl/6 mice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 257:113554. [PMID: 31767231 DOI: 10.1016/j.envpol.2019.113554] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/17/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
The influenza is a common viral infection that can be fatal, especially in high-risk groups such as children, pregnant women, elderly, and immune-deficient individuals. Vaccination is the most efficient approach to prevent the spreading of viral infection and promote individual and public health. In contrast, exposure to environmental pollutants such as cigarette smoke reduces the efficacy of vaccination. We investigated whether chronic exposure to hydroquinone (HQ), the most abundant compound of the tobacco particulate phase, could impair the adaptive immune responses elicited by influenza vaccination. For this, adult male C57BL/6 mice were daily exposed to either nebulized HQ or PBS for 1 h for a total of eight weeks. At weeks 6 and 8, the mice were primed and boosted with the trivalent influenza vaccine via IM respectively. Although the HQ exposure did not alter the body weight of the mice and the biochemical and hematological parameters, the pollutant increased the oxidative stress in splenocytes of immunized animals, modified the morphology of spleen follicles, and augmented the size of their lymph nodes. The lymphoid organs of HQ-exposed mice presented a similar number of vaccine-specific IgG-secreting cells, titers of vaccine-specific total IgG, and respective subclasses. Transcriptome studies with HQ, benzene, or cigarette smoke exposure were also analyzed. The genes up-regulated upon pollutant exposure were associated with neutrophil migration and were shown to be co-expressed with antibody-secreting cell genes. Therefore, these findings suggest that HQ exposure may trigger an immune-compensatory mechanism that enhances the humoral responses induced by influenza vaccination.
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Affiliation(s)
- André Luis Fabris
- Laboratory of Experimental Toxicology, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Andre Vinicius Nunes
- Laboratory of Immunology, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Viviane Schuch
- Computational Systems Biology Laboratory, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Marina de Paula-Silva
- Laboratory of Experimental Toxicology, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Gho Rocha
- Laboratory of Experimental Toxicology, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Helder I Nakaya
- Computational Systems Biology Laboratory, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Paulo Lee Ho
- Bacteriology Service, BioIndustrial Division, Butantan Institute, São Paulo, Brazil
| | - Eduardo L V Silveira
- Laboratory of Immunology, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
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16
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Bastonini E, Bellei B, Filoni A, Kovacs D, Iacovelli P, Picardo M. Involvement of non‐melanocytic skin cells in vitiligo. Exp Dermatol 2019; 28:667-673. [DOI: 10.1111/exd.13868] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/23/2018] [Accepted: 12/19/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Emanuela Bastonini
- Cutaneous Physiopathology and Integrated Center of Metabolomics ResearchSan Gallicano Dermatological Institute, IRCCS Rome Italy
| | - Barbara Bellei
- Cutaneous Physiopathology and Integrated Center of Metabolomics ResearchSan Gallicano Dermatological Institute, IRCCS Rome Italy
| | - Angela Filoni
- Cutaneous Physiopathology and Integrated Center of Metabolomics ResearchSan Gallicano Dermatological Institute, IRCCS Rome Italy
| | - Daniela Kovacs
- Cutaneous Physiopathology and Integrated Center of Metabolomics ResearchSan Gallicano Dermatological Institute, IRCCS Rome Italy
| | - Paolo Iacovelli
- Cutaneous Physiopathology and Integrated Center of Metabolomics ResearchSan Gallicano Dermatological Institute, IRCCS Rome Italy
| | - Mauro Picardo
- Cutaneous Physiopathology and Integrated Center of Metabolomics ResearchSan Gallicano Dermatological Institute, IRCCS Rome Italy
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17
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Kundu RV, Mhlaba JM, Rangel SM, Le Poole IC. The convergence theory for vitiligo: A reappraisal. Exp Dermatol 2018; 28:647-655. [PMID: 29704874 DOI: 10.1111/exd.13677] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2018] [Indexed: 12/15/2022]
Abstract
Vitiligo is characterized by progressive loss of skin pigmentation. The search for aetiologic factors has led to the biochemical, the neurologic and the autoimmune theory. The convergence theory was then proposed several years ago to incorporate existing theories of vitiligo development into a single overview of vitiligo aetiology. The viewpoint that vitiligo is not caused only by predisposing mutations, or only by melanocytes responding to chemical/radiation exposure, or only by hyperreactive T cells, but rather results from a combination of aetiologic factors that impact melanocyte viability, has certainly stood the test of time. New findings have since informed the description of progressive depigmentation. Understanding the relative importance of such aetiologic factors combined with a careful selection of the most targetable pathways will continue to drive the next phase in vitiligo research: the development of effective therapeutics. In that arena, it is likewise important to acknowledge that pathways affected in some patients may not be altered in others. Taken together, the convergence theory continues to provide a comprehensive viewpoint of vitiligo aetiology. The theory serves to intertwine aetiologic pathways and will help to define pathways amenable to disease intervention in individual patients.
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Affiliation(s)
- Roopal V Kundu
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - Julia M Mhlaba
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | | | - I Caroline Le Poole
- Department of Dermatology, Northwestern University, Chicago, IL, USA.,Department of Microbiology and Immunology, Northwestern University, Chicago, IL, USA
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