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Ni Y, Zhang Y, Sun J, Zhao L, Wu B, Ye J. The effect of antioxidant dietary supplements and diet-derived circulating antioxidants on vitiligo outcome: evidence from genetic association and comprehensive Mendelian randomization. Front Nutr 2024; 10:1280162. [PMID: 38274214 PMCID: PMC10808665 DOI: 10.3389/fnut.2023.1280162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 12/27/2023] [Indexed: 01/27/2024] Open
Abstract
Background Previous studies have indicated that antioxidant diets may have a positive impact on vitiligo by interfering with oxidative stress mechanisms. However, there has been a lack of research utilizing the Mendelian randomization (MR) method to analyze the relationship between antioxidant diet intake and vitiligo. Methods In this study, we employed both univariate Mendelian randomization (UVMR) and multivariate Mendelian randomization (MVMR) approaches. The specific antioxidant dietary supplements (such as coffee intake, green tea intake, herbal tea intake, standard tea intake, and average weekly red wine intake) as well as diet-derived circulating antioxidants, including Vit. C (ascorbate), Vit. E (α-tocopherol), Vit. E (γ-tocopherol), Carotene, Vit. A (retinol), Zinc, and Selenium (N = 2,603-428,860) were significantly associated with independent single-nucleotide polymorphisms (SNPs). We obtained pooled statistics on vitiligo from a meta-analysis of three genome-wide association studies (GWASs) of European ancestry, including 4,680 cases and 39,586 controls. Inverse variance weighted (IVW) was employed as the primary analytical method, and sensitivity analysis was conducted to assess the robustness of the main findings. Results Genetically, coffee intake [odds ratio (OR) = 0.17, 95% confidence interval (CI) 0.07-0.37, p = 1.57 × 10-5], average weekly red wine intake (OR = 0.28, 95% CI 0.08-1.00, p = 0.049), and standard tea intake (OR = 0.99, 95% CI 0.98-0.99, p = 5.66 × 10-7) were identified as protective factors against vitiligo. However, no causal effect between the intake of other antioxidant diets and vitiligo was found. Moreover, no instances of pleiotropy or heterogeneity were observed in this study. Conclusion Our study indicates that coffee, standard tea, and red wine consumption can potentially reduce the risk of vitiligo. However, there is insufficient evidence to support that other antioxidant diets have a significant effect on vitiligo.
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Affiliation(s)
- Yao Ni
- Nanjing University of Traditional Chinese Medicine, Nanjing, Jiangsu, China
- Department of Dermatovenereology, Chengdu Second People’s Hospital, Chengdu, Sichuan, China
| | - Youqian Zhang
- Health Science Center, Yangtze University, Jingzhou, Hubei, China
| | - Jingying Sun
- Department of Dermatovenereology, Chengdu Second People’s Hospital, Chengdu, Sichuan, China
| | - Lingyi Zhao
- Department of Dermatovenereology, Chengdu Second People’s Hospital, Chengdu, Sichuan, China
| | - Bo Wu
- Department of Dermatovenereology, Chengdu Second People’s Hospital, Chengdu, Sichuan, China
| | - Jianzhou Ye
- Nanjing University of Traditional Chinese Medicine, Nanjing, Jiangsu, China
- Department of Dermatovenereology, The First Affiliated Hospital of Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan, China
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Chauhan K, Goel F, Singh S. Apigenin protects melanocytes and improve tyrosinase activity in a hydroquinone induced vitiligo mouse model targeting P38 MAP kinase signaling: histopathology and immunohistochemistry analysis. Naunyn Schmiedebergs Arch Pharmacol 2023:10.1007/s00210-023-02917-4. [PMID: 38157025 DOI: 10.1007/s00210-023-02917-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 12/20/2023] [Indexed: 01/03/2024]
Abstract
Apigenin (APG) is a plant-based flavonoid that possesses antioxidants, anti-inflammatory, and modulates P38 MAPK as well as tyrosinase. Hydroquinone (HQ), a phenolic compound was used to induce vitiligo in C57BL/6 mice. The present study was performed to check the therapeutic potential of apigenin in HQ-induced vitiligo via targeting P38 MAPK pathway. In the present study, 41 C57BL/6 mice were divided into six groups containing seven animals per group except normal group. (I) normal group, (II) HQ group, (III) to (IV) APG with (1%, 2.5%, 5%), and (VI) tacrolimus (TAC) group. Topical application of HQ was performed from day 1 to day 20 to, (II), (III) to (IV) APG with (1%, 2.5%, 5%), (VI) tacrolimus (TAC) group, and then APG; tacrolimus (TAC) was applied from day 21 to day 60 after removing the hair. In the case of (I) normal group and (II) HQ group, we smeared them with water for 60 days and HQ for 20 days in their individual group. On day 61 after anesthesia, a part of the target skin was peeled and blood serum was taken to check the level of malondialdehyde, cholinesterase, catalase, tyrosinase, pro-inflammatory cytokines, and expression of P38 MAPK, histology of melanin containing hair follicles and depigmentation evaluation. Applying HQ topically had a noticeable impact on depigmentation, inflammatory indicators, oxidative stress, and lowered tyrosinase activity. Further HQ reduced melanin containing hair follicles and increased expression of P38 MAPK was confirmed by histopathology and immunohistochemistry. Furthermore, application of APG and TAC after day 21 to 60 significantly reduced depigmentation, inflammatory markers, oxidative stress, and increased tyrosinase. Furthermore, APG increased melanin containing hair follicles and decreased expression of non-phosphorylated P38 MAPK, as confirmed by histopathology and immunohistochemistry. Our finding demonstrated that APG significantly prevented HQ-induced vitiligo by acting as an anti-inflammatory, increasing tyrosine, and reducing the expression of non-phosphorylated P38 MAPK.
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Affiliation(s)
- Kanupriya Chauhan
- Department of Pharmacology, ISF College of Pharmacy, Moga, 142001, Punjab, India
| | - Falguni Goel
- Department of Pharmacology, ISF College of Pharmacy, Moga, 142001, Punjab, India
| | - Shamsher Singh
- Department of Pharmacology, ISF College of Pharmacy, Moga, 142001, Punjab, India.
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Yang P, Luan M, Li W, Niu M, He Q, Zhao Y, Chen J, Mao B, Mou K, Li P. Single-cell transcriptomics reveals peripheral immune responses in non-segmental vitiligo. Front Immunol 2023; 14:1221260. [PMID: 38077333 PMCID: PMC10702986 DOI: 10.3389/fimmu.2023.1221260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 11/07/2023] [Indexed: 12/18/2023] Open
Abstract
Background Vitiligo is a common autoimmune depigmented dermatology due to destruction of melanocytes. Much evidence suggests that vitiligo is associated with systemic immune activation. Previous studies have focused on immune cell infiltration in and around lesion areas, but few studies have investigated the cell types and function of circulating immune cells in peripheral blood. Here, single cell RNA-sequencing (scRNA-seq) was used to investigate the mechanisms of peripheral immune responses in vitiligo patients. Methods Peripheral blood was collected from five patients with progressive non-segmental vitiligo and three healthy controls. Peripheral blood mononuclear cells (PBMCs) were obtained by Ficoll-Paque density gradient centrifugation, and scRNA-seq was performed on isolated cell populations to obtain single cell transcriptomes and characterize important genes and intracellular signaling pathways. The key findings were validated with qPCR and flow cytometry assays. Results We identified 10 major cell types by scRNA-seq. Among these cell types, neutrophils were specifically observed in our scRNA-seq data from PBMCs. Peripheral blood effector CD8+ T cells from vitiligo patients did not show significant differences at the transcriptome level compared with healthy controls, whereas regulatory T cells showed pro-inflammatory TH1-like properties. Innate immune cells, including natural killer cells and dendritic cells, showed increased antigen processing and presentation as well as upregulated interferon responses. B cells, monocytes, and neutrophils all showed activation. B cells, especially memory B cells, had upregulated expression of genes related to humoral immunity. Monocytes showed production of proinflammatory cytokines and chemokines. Neutrophils showed strong chemokine ligand-receptor (L-R) pair (CXCR8-CXCR2) autocrine signaling pathway. Conclusion This study revealed the genetic profile and signaling pathway characteristics of peripheral blood immune cells in vitiligo patients, providing new insights into its pathogenesis, which may facilitate identification of potential therapeutic targets.
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Affiliation(s)
- Pengju Yang
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Mei Luan
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Weizhe Li
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Mengtian Niu
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Qiannan He
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Yixin Zhao
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Jianan Chen
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Binyue Mao
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Kuanhou Mou
- Department of Dermatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Pan Li
- Center for Translational Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
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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: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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Bellei B, Papaccio F, Picardo M. Regenerative Medicine-Based Treatment for Vitiligo: An Overview. Biomedicines 2022; 10:2744. [DOI: 10.3390/biomedicines10112744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/21/2022] [Accepted: 10/25/2022] [Indexed: 11/16/2022] Open
Abstract
Vitiligo is a complex disorder with an important effect on the self-esteem and social life of patients. It is the commonest acquired depigmentation disorder characterized by the development of white macules resulting from the selective loss of epidermal melanocytes. The pathophysiology is complex and involves genetic predisposition, environmental factors, oxidative stress, intrinsic metabolic dysfunctions, and abnormal inflammatory/immune responses. Although several therapeutic options have been proposed to stabilize the disease by stopping the depigmentation process and inducing durable repigmentation, no specific cure has yet been defined, and the long-term persistence of repigmentation is unpredictable. Recently, due to the progressive loss of functional melanocytes associated with failure to spontaneously recover pigmentation, several different cell-based and cell-free regenerative approaches have been suggested to treat vitiligo. This review gives an overview of clinical and preclinical evidence for innovative regenerative approaches for vitiligo patients.
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Dong J, Huang X, Ma LP, Qi F, Wang SN, Zhang ZQ, Wei SN, Gao L, Liu F. Baricitinib is Effective in Treating Progressing Vitiligo in vivo and in vitro. Dose Response 2022; 20:15593258221105370. [PMID: 35663493 PMCID: PMC9160904 DOI: 10.1177/15593258221105370] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/08/2022] [Accepted: 05/17/2022] [Indexed: 11/17/2022]
Abstract
Objective To evaluate the clinical efficacy and safety of baricitinib, a Janus kinase (JAK) inhibitor, in treating patient with progressing vitiligo, and to further explore the regulation of baricitinib on melanocytes (MCs) in vitro. Methods Four patients with progressing vitiligo were treated with oral baricitinib for a total of 12 weeks. MCs were cultured in vitro and irradiated by high-dose ultraviolet B (UVB, 150mJ/cm2) to make an MC damaged model (MC-Ds). Baricitinib was added at a final concentration of 25 μM. Dopamine staining and NaOH method were used to measure the tyrosinase activity and melanin level, respectively, real-time quantitative polymerase chain reaction (RT-qPCR) was used to measure the mRNA levels of tyrosinase (TYR), tyrosinase-related protein-1 (TRP-1). Results Significant re-pigmentation was observed in the week 12 without obvious side effects. Depigmentation occurred in 2 patients at the 3-month follow-up. Laboratory research found that higher doses of UVB irradiation (150mJ/cm2) could decrease melanin content of MCs, baricitinib (25 μM) could significantly promote tyrosinase activity, melanin content, and TYR, TRP-1 gene expression of MC-Ds. Conclusion Our preliminary study showed that baricitinib was effective and safe in treating progressing vitiligo. Baricitinib could promote tyrosinase activity, melanin content and TYR, TRP1 gene expression of MC-Ds in vitro.
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Affiliation(s)
- Jie Dong
- Department of Dermatology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Xuan Huang
- Medical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Li-Ping Ma
- China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Fei Qi
- Department of Dermatology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Si-Nian Wang
- PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Zi-Qin Zhang
- PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Shi-Nan Wei
- PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Ling Gao
- China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Fang Liu
- Department of Dermatology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
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