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Yuan Y, Liu S, Yang H, Xu J, Zhai J, Jiang H, Sun B. Acetylshikonin induces apoptosis through the endoplasmic reticulum stress-activated PERK/eIF 2α /CHOP axis in oesophageal squamous cell carcinoma. J Cell Mol Med 2024; 28:e18030. [PMID: 37929884 PMCID: PMC10807581 DOI: 10.1111/jcmm.18030] [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: 05/24/2023] [Revised: 10/17/2023] [Accepted: 10/25/2023] [Indexed: 11/07/2023] Open
Abstract
Acetylshikonin (AS) is an active component of Lithospermum erythrorhizon Sieb. et Zucc that exhibits activity against various cancers; however, the underlying mechanisms of AS against oesophageal squamous carcinoma (ESCC) need to be elusive. The research explores the anti-cancer role and potential mechanism of AS on ESCC in vitro and in vivo, providing evidences for AS treatment against ESCC. In this study, we firstly demonstrated that AS treatment effectively inhibits cell viability and proliferation of ESCC cells. In addition, AS significantly induces G1/S phage arrest and promotes apoptosis in ESCC cell lines. Further studies reveal that AS induces ER stress, as observed by dose- and time-dependently increased expression of BIP, PDI, PERK, phosphorylation of eIF2α , CHOP and splicing of XBP1. CHOP knockdown or PERK inhibition markedly rescue cell apoptosis induced by AS. Moreover, AS treatment significantly inhibits ESCC xenograft growth in nude mice. Elevated expression of BIP and CHOP is also observed in xenograft tumours. Taken together, AS inhibits proliferation and induces apoptosis through ER stress-activated PERK/eIF2α /CHOP pathway in ESCC, which indicates AS represents a promising candidate for ESCC treatment.
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Affiliation(s)
- Ya‐Jiao Yuan
- Department of Biochemistry and Molecular Biology, College of Clinical and Basic MedicineShandong First Medical University & Shandong academy of medical sciencesJinanChina
- Department of Clinical LaboratoryQingdao Jimo People's HospitalQingdaoChina
| | - Shanshan Liu
- Department of Biochemistry and Molecular Biology, College of Clinical and Basic MedicineShandong First Medical University & Shandong academy of medical sciencesJinanChina
| | - Hong Yang
- Department of Clinical LaboratoryTaian Central HospitalChina
| | - Jian‐Ling Xu
- Department of Biochemistry and Molecular Biology, College of Clinical and Basic MedicineShandong First Medical University & Shandong academy of medical sciencesJinanChina
| | - Jing Zhai
- Department of Biochemistry and Molecular Biology, College of Clinical and Basic MedicineShandong First Medical University & Shandong academy of medical sciencesJinanChina
| | - Han‐Ming Jiang
- Department of Biochemistry and Molecular Biology, College of Clinical and Basic MedicineShandong First Medical University & Shandong academy of medical sciencesJinanChina
| | - Beibei Sun
- Department of Biochemistry and Molecular Biology, College of Clinical and Basic MedicineShandong First Medical University & Shandong academy of medical sciencesJinanChina
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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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Xie B, Zhu Y, Shen Y, Xu W, Song X. Treatment update for vitiligo based on autoimmune inhibition and melanocyte protection. Expert Opin Ther Targets 2023; 27:189-206. [PMID: 36947026 DOI: 10.1080/14728222.2023.2193329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
INTRODUCTION The treatment of vitiligo remains challenging due to the complexity of its pathogenesis, influenced by genetic factors, oxidative stress and abnormal cell adhesion that collectively impact melanocyte survival and trigger immune system attacks, resulting in melanocyte death. Melanocytes in vitiligo are believed to exhibit genetic susceptibility and defects in cellular mechanisms, such as defects in autophagy, that reduce their ability to resist oxidative stress, leading to increased expression of the pro-inflammatory protein HSP70. The low expression of adhesion molecules, such as DDR1 and E-cadherin, accelerates melanocyte damage and antigen exposure. Consequently, autoimmune attacks centered on IFN-γ-CXCR9/10-CXCR3-CD8+ T cells are initiated, causing vitiligo. AREAS COVERED This review discusses the latest knowledge on the pathogenesis of vitiligo and potential therapeutic targets from the perspective of suppressing autoimmune attacks and activating melanocytes functions. EXPERT OPINION Vitiligo is one of the most challenging dermatological diseases due to its complex pathogenesis with diverse therapeutic targets. Immune suppression, such as corticosteroids and emerging JAK inhibitors, has proven effective in disease progression. However, during the early stages of the disease, it is also important to optimize therapeutic strategies to activate melanocytes for alleviating oxidative stress and improving treatment outcomes.
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Affiliation(s)
- Bo Xie
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
| | - Yuqi Zhu
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
- Zhejiang Chinese Medical University; Binwen Rd 548, Hangzhou, 310053, People's Republic of China
| | - Yuqing Shen
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
- Zhejiang Chinese Medical University; Binwen Rd 548, Hangzhou, 310053, People's Republic of China
| | - Wen Xu
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
- Zhejiang University School of Medicine; Yuhangtang Rd 866, Hangzhou, 310058, People's Republic of China
| | - Xiuzu Song
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
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Yang H, Song J, Li A, Lv L, Sun X, Mao Y, Ye D. Genetically predicted levels of folate, vitamin B12, and risk of autoimmune diseases: A Mendelian randomization study. Front Immunol 2023; 14:1139799. [PMID: 36969181 PMCID: PMC10038229 DOI: 10.3389/fimmu.2023.1139799] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 02/24/2023] [Indexed: 03/12/2023] Open
Abstract
BackgroundEvidence from observational studies on the association of folate and vitamin B12 with autoimmune diseases are conflicting.ObjectiveWe aimed to investigate the relationship of folate and vitamin B12 with autoimmune diseases using Mendelian randomization (MR).Materials and methodsWe selected single-nucleotide polymorphisms associated with folate and vitamin B12 at the genome-wide significance level. Summary-level data for four common autoimmune diseases (vitiligo, inflammatory bowel disease, rheumatoid arthritis, and systemic lupus erythematosus) were obtained from large-scale genome-wide association studies, with a sample size of 44,266, 86,640, 58,284, and 23,210, respectively. MR analyses were conducted using the inverse variance weighted (IVW) approach, and sensitivity analyses were further performed to test the robustness.ResultsWe found that a higher genetically determined serum folate level per one standard deviation (SD) was associated with a decreased risk of vitiligo by the IVW method [odds ratios (OR) = 0.47; 95% confidence interval (CI): 0.32–0.69; P = 1.33 × 10-4]. Sensitivity analyses using alternative methods showed similar associations, and no evidence of pleiotropy was detected by MR-Egger regression (P = 0.919). In addition, we observed that vitamin B12 per one SD was positively associated with IBD (IVW: OR = 1.14, 95% CI: 1.03–1.26, P = 0.010; maximum likelihood: OR = 1.14, 95% CI: 1.01–1.29, P = 0.035; MR-PRESSO: OR = 1.14, 95% CI:1.01–1.28, P =0.037), while the association was not significant after Bonferroni correction.ConclusionThe study provides convincing evidence for an inverse association between serum folate level and risk of vitiligo. Further studies are warranted to elucidate the possible association between vitamin B12 and risk of IBD.
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Affiliation(s)
- Hong Yang
- Department of Epidemiology, School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jie Song
- Department of Epidemiology, School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Aole Li
- The Fourth College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Linshuoshuo Lv
- Department of Epidemiology, School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xiaohui Sun
- Department of Epidemiology, School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yingying Mao
- Department of Epidemiology, School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
- *Correspondence: Ding Ye, ; Yingying Mao,
| | - Ding Ye
- Department of Epidemiology, School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
- *Correspondence: Ding Ye, ; Yingying Mao,
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Xing P, Li X, Bai Y, Jiao Z. Cypermethrin and/or sulfamethoxazole exposure effect on apoptosis and endoplasmic reticulum of grass carp cardiomyocyte. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 252:114594. [PMID: 36753969 DOI: 10.1016/j.ecoenv.2023.114594] [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: 12/06/2022] [Revised: 01/24/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
With the soar use range of pesticides and antibiotics in agricultural production, the pollution of surrounding runoff has become more severe; thus, the health and safety of non-target species such as fish are at risk. Excessive amounts of cypermethrin (CMN, 0.651 mg/l) and sulfamethoxazole (SMZ, 0.3 mg/l) are known to trigger oxidative stress and endoplasmic reticulum stress, resulting in toxic effects on cells. The damage degree of poisons on grass carp and the effect of the corresponding axis pathway PERK/eif2α/CHOP are still unknown. Therefore, our study set up two single poison groups (CMN/SMZ) and a combined poison group (CMN&SMZ) to detect this pathway and related indicators. After detection, the content of MDA both in CMN and SMZ group myocardium tissue was increased, while the SOD, CAT activity and GSH levels were decreased. Apoptosis-related genes (Bax, PUMA, P53 and Caspase-3/9), inflammation-related genes (TNF-α, iNOS and IL-1β/6/8), ER stress pathway PERK/eif2α/CHOP and related genes (ATF6, IRE1a and GRP78) were all increased; in contrast, the anti-apoptotic gene Bcl-2 was down-regulated. From the overall trend observation, the apoptosis proportion of cardiomyocytes in the combined poison group was higher than that of the single poison. In summary, this study shows that CMZ and SMZ can induce oxidative stress and subsequent ER stress in grass carp cardiomyocytes by regulating the PERK/eif2α/CHOP signaling axle, thereby inducing apoptosis, and followed by inflammatory responses. The combined effect of the CMZ and SMZ mixture was severer than that of a single poison (CMZ or SMZ), so it can be inferred that the damage degree of grass carp myocardium tissue would be aggravated with the appearance of CMZ or/and SMZ. The experimental results of this study have suggestions and warnings for the toxicological research of CMZ and SMZ and the management of industrial and ecological balance.
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Affiliation(s)
- Pengcheng Xing
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, Heilongjiang, PR China
| | - Xiang Li
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, Heilongjiang, PR China
| | - Yiwei Bai
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, Heilongjiang, PR China
| | - Zhihui Jiao
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, Heilongjiang, PR China.
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Wei G, Pan Y, Wang J, Xiong X, He Y, Xu J. Role of HMGB1 in Vitiligo: Current Perceptions and Future Perspectives. CLINICAL, COSMETIC AND INVESTIGATIONAL DERMATOLOGY 2022; 15:2177-2186. [PMID: 36267690 PMCID: PMC9576603 DOI: 10.2147/ccid.s381432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 09/23/2022] [Indexed: 11/05/2022]
Abstract
Vitiligo is a chronic depigmenting disorder of the skin and mucosa caused by the destruction of epidermal melanocytes. Although the exact mechanism has not been elucidated, studies have shown that oxidative stress plays an important role in the pathogenesis of vitiligo. High mobility group box protein B1 (HMGB1) is a major nonhistone protein and an extracellular proinflammatory or chemotactic molecule that is actively secreted or passively released by necrotic cells. Recent data showed that HMGB1 is overexpressed in both blood and lesional specimens from vitiligo patients. Moreover, oxidative stress triggers the release of HMGB1 from keratinocytes and melanocytes, indicating that HMGB1 may participate in the pathological process of vitiligo. Overall, this review mainly focuses on the role of HMGB1 in the potential mechanisms underlying vitiligo depigmentation under oxidative stress. In this review, we hope to provide new insights into vitiligo pathogenesis and treatment strategies.
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Affiliation(s)
- Guangmin Wei
- Department of Dermatology, Medical Center Hospital of Qionglai City, Qionglai, Sichuan, People’s Republic of China
| | - Yinghao Pan
- Department of Dermatology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, People’s Republic of China
| | - Jingying Wang
- Department of Dermatology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, People’s Republic of China
| | - Xia Xiong
- Department of Dermatology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, People’s Republic of China
| | - Yuanmin He
- Department of Dermatology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, People’s Republic of China
| | - Jixiang Xu
- Department of Dermatology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, People’s Republic of China,Correspondence: Jixiang Xu, Department of Dermatology, The Affiliated Hospital of Southwest Medical University, No. 25 of Taiping Road, Luzhou, Sichuan, 646000, People’s Republic of China, Email
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Li N, Zhao Y, Wang F, Song L, Qiao M, Wang T, Huang X. Folic acid alleviates lead acetate-mediated cardiotoxicity by down-regulating the expression levels of Nrf2, HO-1, GRP78, and CHOP proteins. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:55916-55927. [PMID: 35322363 DOI: 10.1007/s11356-022-19821-8] [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: 09/10/2021] [Accepted: 03/16/2022] [Indexed: 06/14/2023]
Abstract
The purpose of this study was to explore the interventional effects of folic acid on the heart damage caused by lead acetate exposure. Twenty-four 60-day-old male Sprague-Dawley (SD) rats were randomly divided into 4 groups with 6 rats in each group. The control group (C group) was normal rats; the lead exposure group (L group) rats drank 0.2% lead acetate solution freely for 14 days. The rats in the intervention group (T group) were given 0.2% lead acetate solution for 14 days, respectively, and 0.4 mg/kg BW folic acid solution was given to the rats by gavage on the 7th day of lead administration. The rats in the folic acid group (group E) were given 0.4 mg/kg BW folic acid solution by gavage. To weigh rat body weight and heart weight, calculate heart index, and observe the expression level of nuclear factor erythroid 2-related factor 2(Nrf2), heme oxygenase 1(HO-1), glucose-regulated protein 78/binding immunoglobulin protein (GRP78), and C/EBP-homologous protein (CHOP) by immunofluorescence method. The results showed that compared with group C, serum lead levels in group L and T were significantly increased (P < 0.05); superoxide dismutase (SOD), glutathione (GSH), and glutathione peroxidase (GSH-PX) levels in group L were significantly decreased (P < 0.05), and malondialdehyde (MDA) content was significantly higher increased (P < 0.05), and the GSH-PX content in group T were significantly increased in group L (P < 0.05), and the MDA content in group T was significantly lower than that in group L (P < 0.05). Compared with group C, the expression of Nrf2, HO-1, GRP78, and CHOP in group L increased significantly, and the difference was statistically significant (P < 0.05). Compared with the L group, the expression of Nrf2, HO-1, GRP78, and CHOP in the T group was reduced. Therefore, folic acid has a certain protective effect on the oxidative damage of lead-exposed rat heart tissue. Lead exposure will increase ROS, NO, MDA, and other oxidizing substances and reduce the level of GSH, SOD, CAT, GPx, and other antioxidant factors, which will lead to cardiac hypertrophy, cardiac index increase, oxidative stress, Nrf2, and HO-1. The expression of stress-related proteins such as GRP78 and CHOP also increased, leading to cardiomyocyte apoptosis. After a folic acid intervention, these changes can be significantly reversed.
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Affiliation(s)
- Ning Li
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Yali Zhao
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, 450002, China
| | - Fangyu Wang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Lianjun Song
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, 450002, China
| | - Mingwu Qiao
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, 450002, China
| | - Tianlin Wang
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, 450002, China
| | - Xianqing Huang
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, 450002, China
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Relationships of Serum Homocysteine, Vitamin B12, and Folic Acid Levels with Papulopustular Rosacea Severity: A Case-Control Study. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5479626. [PMID: 35832851 PMCID: PMC9273444 DOI: 10.1155/2022/5479626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 06/18/2022] [Indexed: 02/07/2023]
Abstract
Background Rosacea is a chronic inflammatory skin disease with a multifactorial etiology. Recently, associations between serum homocysteine (Hcy) levels and inflammatory skin diseases, such as psoriasis and hidradenitis suppurativa, have been reported. However, no study has explored the levels of serum Hcy, folic acid, and vitamin B12 in patients with rosacea. Objective To investigate serum Hcy, vitamin B12, and folic acid levels in patients with papulopustular rosacea (PPR), we characterized the association of these levels with PPR severity. Methods This case-control study included 138 PPR patients and 58 healthy controls. The serum levels of Hcy, vitamin B12, and folic acid were measured. A correlation was assessed between disease severity and serum levels of Hcy, vitamin B12, and folic acid. Results Serum vitamin B12 and folic acid levels were significantly lower in PPR patients than in the healthy controls (p = 0.011 and p = 0.0173, respectively). Although serum Hcy levels did not significantly differ between PPR patients and healthy controls, PPR severity was positively correlated with serum Hcy levels (p < 0.001). Conclusions Our results suggest a possible association between hyperhomocysteinemia and vitamin B12 deficiency in patients with PPR.
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Guo J, Hu H, Chen Z, Xu J, Nie J, Lu J, Ma L, Ji H, Yuan J, Xu B. Cold Exposure Induces Intestinal Barrier Damage and Endoplasmic Reticulum Stress in the Colon via the SIRT1/Nrf2 Signaling Pathway. Front Physiol 2022; 13:822348. [PMID: 35514335 PMCID: PMC9065603 DOI: 10.3389/fphys.2022.822348] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 03/31/2022] [Indexed: 11/13/2022] Open
Abstract
Ambient air temperature is a key factor affecting human health. Long-term exposure to a cold environment can cause various diseases, while the impact on the intestine, the organ which has the largest contact area with the external environment, cannot be ignored. In this study, we investigated the effect of chronic cold exposure on the colon and its preliminary mechanism of action. Mice were exposed to 4°C for 3 hours a day for 10 days. We found that cold exposure damaged the morphology and structure of the colon, destroyed the tight junctions of the colonic epithelial tissue, and promoted inflammation of the colon. At the same time, cold exposure also activated the unfolded protein response (UPR) in the colon and promoted apoptosis in intestinal epithelial cells. Chronic cold exposure induced oxidative stress in vivo, but also significantly enhanced the response of the Nrf2 pathway that promotes an anti-oxidant effect. Furthermore, we demonstrated that chronic cold exposure promoted p65 acetylation to aggravate the inflammatory response by inhibiting SIRT1. Similar results were observed following SIRT1 knock-down by shRNA in Caco-2 cells treated with Thapsigargin (Tg). Knock-down of SIRT1 promoted nuclear localization of Nrf2, and increased the level of Nrf2 acetylation. Taken together, our study indicates that cold exposure may aggravate endoplasmic reticulum stress and damage epithelial tight junctions in the colon by inhibiting SIRT1, which promotes nuclear localization of Nrf2 and induces an anti-oxidant response to maintain intestinal homeostasis. These findings suggest that SIRT1 is a potential target for regulating intestinal health under cold exposure conditions.
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Affiliation(s)
- Jingru Guo
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Huijie Hu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Zhuo Chen
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Jing Xu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Junshu Nie
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Jingjing Lu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Li Ma
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hong Ji
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Jianbin Yuan
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Bin Xu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
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Boo YC. Metabolic Basis and Clinical Evidence for Skin Lightening Effects of Thiol Compounds. Antioxidants (Basel) 2022; 11:antiox11030503. [PMID: 35326153 PMCID: PMC8944565 DOI: 10.3390/antiox11030503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/03/2022] [Accepted: 03/03/2022] [Indexed: 12/17/2022] Open
Abstract
Melanin pigment is a major factor in determining the color of the skin, and its abnormal increase or decrease can cause serious pigmentation disorders. The melanin pigment of the skin is divided into light pheomelanin and dark eumelanin, and a big difference between them is whether they contain sulfur. Melanin synthesis starts from a common reaction in which tyrosine or dihydroxyphenylalanine (DOPA) is oxidized by tyrosinase (TYR) to produce dopaquinone (DQ). DQ is spontaneously converted to leukodopachrome and then oxidized to dopachrome, which enters the eumelanin synthesis pathway. When DQ reacts with cysteine, cysteinyl dopa is generated, which is oxidized to cysteinyl DQ and enters the pheomelanin synthesis pathway. Therefore, thiol compounds can influence the relative synthesis of eumelanin and pheomelanin. In addition, thiol compounds can inhibit enzymatic activity by binding to copper ions at the active site of TYR, and act as an antioxidant scavenging reactive oxygen species and free radicals or as a modulator of redox balance, thereby inhibiting overall melanin synthesis. This review will cover the metabolic aspects of thiol compounds, the role of thiol compounds in melanin synthesis, comparison of the antimelanogenic effects of various thiol compounds, and clinical trials on the skin lightening efficacy of thiol compounds. We hope that this review will help identify the advantages and disadvantages of various thiol compounds as modulators of skin pigmentation and contribute to the development of safer and more effective strategies for the treatment of pigmentation disorders.
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Affiliation(s)
- Yong Chool Boo
- Department of Molecular Medicine, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Korea;
- BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Korea
- Cell and Matrix Research Institute, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Korea
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Xu L, Zhang H, Wang Y, Yang A, Dong X, Gu L, Liu D, Ding N, Jiang Y. FABP4 activates the JAK2/STAT2 pathway via Rap1a in the homocysteine-induced macrophage inflammatory response in ApoE -/- mice atherosclerosis. J Transl Med 2022; 102:25-37. [PMID: 34725437 PMCID: PMC8695379 DOI: 10.1038/s41374-021-00679-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 09/01/2021] [Accepted: 09/03/2021] [Indexed: 12/02/2022] Open
Abstract
Atherosclerosis is a chronic inflammatory vascular disease, and inflammation plays a critical role in its formation and progression. Elevated serum homocysteine (Hcy) is an independent risk factor for atherosclerosis. Previous studies have shown that fatty acid binding protein 4 (FABP4) plays an important role in macrophage inflammation and lipid metabolism in atherosclerosis induced by Hcy. However, the underlying molecular mechanism of FABP4 in Hcy-induced macrophage inflammation remains unknown. In this study, we found that FABP4 activated the Janus kinase 2/signal transducer and activator of transcription 2 (JAK2/STAT2) pathway in macrophage inflammation induced by Hcy. Of note, we further observed that ras-related protein Rap-1a (Rap1a) induced the Tyr416 phosphorylation and membrane translocation of non-receptor tyrosine kinase (c-Src) to activate the JAK2/STAT2 pathway. In addition, the suppressor of cytokine signaling 1 (SOCS1)-a transcriptional target of signal transducer and activator of transcription (STATs) inhibited the JAK2/STAT2 pathway and Rap1a expression via a negative feedback loop. In summary, these results demonstrated that FABP4 promotes c-Src phosphorylation and membrane translocation via Rap1a to activate the JAK2/STAT2 pathway, contributing to Hcy-accelerated macrophage inflammation in ApoE-/- mice.
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Affiliation(s)
- Lingbo Xu
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Huiping Zhang
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
- Prenatal Diagnosis Center of Ningxia Medical University General Hospital, Yinchuan, 750004, China
| | - Yanhua Wang
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
- Department of Gynecology, General Hospital of Ningxia Medical University, Yinchuan, 750004, China
| | - Anning Yang
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Xiaoyan Dong
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Lingyu Gu
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Dayue Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Ning Ding
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Yideng Jiang
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China.
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China.
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China.
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Folic Acid Protects Melanocytes from Oxidative Stress via Activation of Nrf2 and Inhibition of HMGB1. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:1608586. [PMID: 34917229 PMCID: PMC8670940 DOI: 10.1155/2021/1608586] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/13/2021] [Accepted: 11/13/2021] [Indexed: 12/21/2022]
Abstract
Vitiligo is a cutaneous depigmentation disease due to loss of epidermal melanocytes. Accumulating evidence has indicated that oxidative stress plays a vital role in vitiligo via directly destructing melanocytes and triggering inflammatory response that ultimately undermines melanocytes. Folic acid (FA), an oxidized form of folate with high bioavailability, exhibits potent antioxidant properties and shows therapeutic potential in multiple oxidative stress-related diseases. However, whether FA safeguards melanocytes from oxidative damages remains unknown. In this study, we first found that FA relieved melanocytes from H2O2-induced abnormal growth and apoptosis. Furthermore, FA enhanced the activity of antioxidative enzymes and remarkably reduced intracellular ROS levels in melanocytes. Subsequently, FA effectively activated nuclear factor E2-related factor 2 (Nrf2) pathway, and Nrf2 knockdown blocked the protective effects of FA on H2O2-treated melanocytes. Additionally, FA inhibited the production of proinflammatory HMGB1 in melanocytes under oxidative stress. Taken together, our findings support the protective effects of FA on human melanocytes against oxidative injury via the activation of Nrf2 and the inhibition of HMGB1, thus indicating FA as a potential therapeutic agent for the treatment of vitiligo.
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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: 96] [Impact Index Per Article: 32.0] [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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