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Could α MSH-MIFT Axis and IDH2 be Considered Promising Predictors of Non-segmental Vitiligo Response to NB-UVB Phototherapy? THE JOURNAL OF CLINICAL AND AESTHETIC DERMATOLOGY 2023; 16:41-46. [PMID: 36743971 PMCID: PMC9891215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background The search for objective factors that help in predicting the response of vitiligo treatment is very important. Objective We sought to evaluate the effect of NB-UVB phototherapy on both the alpha melanocyte stimulating hormone-microphthalmia-associated transcription factor (α-MSH-MIFT) axis, and isocitrate dehydrogenase 2 (IDH2) in non-segmental vitiligo (NSV). Methods This prospective clinical trial included 50 NSV patients and 50 healthy control subjects. α-MSH tissue levels as well as MITF and IDH2 immunostaining were assessed in normal and vitiliginous skin biopsies before treatment and then in the repigmented areas following 24 NB-UVB phototherapy treatment sessions using ELISA technique and immunohistochemical study, respectively. Results There was a significant negative correlation between baseline VASI scores and the tissue levels of α-MSH (p=0.006) and the expression of both MITF (p<0.00001) and IDH-2 (p= 0.001). The mean α-MSH tissue levels increased significantly after treatment (p<0.001). Tissue expression of both MTIF and IDH-2 was significantly upregulated following treatment (P-value <0.001). The percentage of improvement showed a significant positive correlation with the studied markers (p<0.00001). Conclusion α-MSH- MIFT axis and the antioxidant protein IDH2 are promising objective markers of non-segmental vitiligo severity, and are suggested as predictors of vitiligo response to treatment.
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Javdani H, Etemad L, Moshiri M, Zarban A, Hanafi-Bojd MY. Effect of tannic acid-templated mesoporous silica nanoparticles on iron-induced oxidative stress and liver toxicity in rats. Toxicol Rep 2021; 8:1721-1728. [PMID: 34692422 PMCID: PMC8512627 DOI: 10.1016/j.toxrep.2021.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 09/11/2021] [Accepted: 09/30/2021] [Indexed: 11/28/2022] Open
Abstract
The present study sought to investigate the effects of amino-functionalized tannic acid-templated mesoporous silica nanoparticles (TA-MS-NH2 NPs) on giving rats protection against iron-induced liver toxicity. To this end, the TA-MS-NH2 NPs were characterized using field-emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), and Fourier-transform infrared spectroscopy (FTIR). Moreover, 50 Wistar rats were randomly divided into one control group (group 1) and four experimental groups (groups 2- 5) (n = 10), each of which received 100 mg/kg oral normal saline and FeSO4, respectively. Then, post-exposure hepatotoxicity and oxidative stress markers were measured in two intervals, i.e., after 4 and 24 h, followed by the measurement of the acute iron toxicity. Furthermore, hepatotoxicity markers, including the alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), and total antioxidant capacity (TAC), were measured via Ferric Reducing Antioxidant Power (FRAP) and 2,2,1-diphenyl-1-picrylhydrazyl (DPPH) assays. Also, malondialdehyde (MDA), total thiol groups, advanced oxidation protein products (AOPP), and nitrite/nitrate (NOx) levels were measured as oxidative stress markers in the serum samples. The results indicated that oral administration of iron significantly elevated the liver enzymes and altered the level of oxidative stress markers. It was also found that treatment with TA-MS-NH2 NPs meaningfully protected against hepatotoxicity, decreased ALT, AST, ALP, and significantly improved oxidative stress markers by decreasing MDA, AOPP, and NOx levels and increasing TAC and thiol group contents, proving that TA-MS-NH2 NPs could protect rats against iron-induced acute liver toxicity through their antioxidant features.
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Key Words
- ALP, alkaline phosphatase
- ALT, alanine aminotransferase
- AOPP, advanced oxidation protein products
- AST, aspartate aminotransferase
- Acute iron toxicity
- Antioxidant activity
- DLS, dynamic light scattering
- DPPH, 2,2,1-diphenyl-1-picrylhydrazyl
- FE-SEM, field-emission scanning electron microscope
- FRAP, Ferric Reducing Antioxidant Power
- FT-IR, Fourier-transform infrared spectroscopy
- Liver damage
- MDA, malondialdeide
- Mesoporous silica nanoparticles
- Oxidative stress
- TA-MS-NH2 NPs, amino-functionalized tannic acid-templated mesoporous silica nanoparticles
- TAC, total antioxidant capacity
- TEM, transmission electron microscopy
- Tannic acid
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Affiliation(s)
- Hossein Javdani
- Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjand, Iran.,Molecular Medicine Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Leila Etemad
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Moshiri
- Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Asghar Zarban
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran.,Clinical Biochemistry Department, Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Mohammad Yahya Hanafi-Bojd
- Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjand, Iran.,Nanomedicine Department, Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
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Mathachan SR, Khurana A, Gautam RK, Kulhari A, Sharma L, Sardana K. Does oxidative stress correlate with disease activity and severity in vitiligo? An analytical study. J Cosmet Dermatol 2020; 20:352-359. [PMID: 32422682 DOI: 10.1111/jocd.13499] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 05/14/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Oxidative damage to melanocytes, resulting from an imbalance between the damaging oxidative pathways and the protective anti-oxidants likely plays a pathogenic role in vitiligo. AIM To evaluate three parameters related to the oxidative stress (OS) pathway namely malondialdehyde (MDA), a marker of oxidative damage, and superoxide dismutase (SOD) and reduced glutathione (rGSH) (both antioxidants) in patients with active and stable vitiligo with either localized or generalized disease. PATIENTS/METHODS Sixty clinically diagnosed vitiligo patients were categorized into generalized (n = 30) or localized vitiligo (n = 30) and were further sub-grouped according to their disease activity into active and stable groups. Thirty healthy volunteers were included in the control group. ELISA was used for the evaluation of MDA, SOD, and r GSH. RESULTS The patient group demonstrated significantly raised levels of MDA and significantly decreased levels of SOD and rGSH compared with the control group. Further, the OS parameters were significantly more deranged in patients with generalized disease (all three-MDA, rGSH, and SOD) and an active disease (MDA) as compared to those with localized and stable disease, respectively. CONCLUSION Our findings suggest an important role of OS in relation to vitiligo activity and severity. Although the OS parameters were deranged in all subsets of patients, with respect to controls, the derangement of oxidative damage marker (MDA) in generalized and active disease groups was most marked. Disease remains active when the oxidative damage becomes higher but is unmatched with the anti-oxidant reserve which does not proportionately increase.
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Affiliation(s)
- Sinu Rose Mathachan
- Department of Dermatology, Venereology and Leprosy, Atal Bihari Vajpayee Institute of Medical Sciences and Dr. Ram Manohar Lohia Hospital, New Delhi, India
| | - Ananta Khurana
- Department of Dermatology, Venereology and Leprosy, Atal Bihari Vajpayee Institute of Medical Sciences and Dr. Ram Manohar Lohia Hospital, New Delhi, India
| | - Ram Kishan Gautam
- Department of Dermatology, Venereology and Leprosy, Atal Bihari Vajpayee Institute of Medical Sciences and Dr. Ram Manohar Lohia Hospital, New Delhi, India
| | - Anita Kulhari
- Department of Dermatology, Venereology and Leprosy, Atal Bihari Vajpayee Institute of Medical Sciences and Dr. Ram Manohar Lohia Hospital, New Delhi, India
| | - Lokesh Sharma
- Department of Biochemistry, Atal Bihari Vajpayee Institute of Medical Sciences and Dr. Ram Manohar Lohia Hospital, New Delhi, India
| | - Kabir Sardana
- Department of Dermatology, Venereology and Leprosy, Atal Bihari Vajpayee Institute of Medical Sciences and Dr. Ram Manohar Lohia Hospital, New Delhi, India
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Dibromoacetic Acid Induced Hepatotoxicity in Mice through Oxidative Stress and Toll-Like Receptor 4 Signaling Pathway Activation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:5637235. [PMID: 31827682 PMCID: PMC6886355 DOI: 10.1155/2019/5637235] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 07/31/2019] [Accepted: 09/26/2019] [Indexed: 01/13/2023]
Abstract
Dibromoacetic acid (DBA) is one of haloacetic acids, often as a by-product of disinfection in drinking water. DBA is a multiple-organ carcinogen in rodent animals, but little research on its hepatotoxicity has been conducted and its mechanism has not been elucidated. In this study, we found that DBA could induce obvious hepatotoxcity in Balb/c mice as indicated by histological changes, increasing serum level of alanine aminotransferase (ALT) and aspartate aminotransferase (AST), and accumulation of hepatic glycogen, after the mice were administered DBA at doses of 1.25, 5, and 20 mg/kg body weight for 28 days via oral gavage. In mechanism study, DBA induced oxidative stress as evidenced by increasing the level of malondialdehyde (MDA), reactive oxygen species (ROS) in the liver, advanced oxidative protein products (AOPPs) in the serum, and decreasing the level of glutathione (GSH) in the liver. DBA induced inflammation in the liver of the mice which is supported by increasing the production of tumor necrosis factor-α (TNF-α) and the mRNA levels of TNF-α, interleukin-6 (IL-6), interleukin-1β (IL-1β), and nuclear factor κB (NF-κB) in the liver. DBA also upregulated the protein levels of Toll-like receptor (TLR) 4, myeloid differentiation factor 88 (MyD88), tumor necrosis factor receptor-associated factor 6 (TRAF6), inhibitor of nuclear factor κB alpha (IκB-α), nuclear factor κB p65 (NF-κB p65), and the phosphoralation of P38 mitogen-activated protein kinase (P38MAPK) and c-Jun N-terminal kinase (JNK). Conclusion. DBA could induce hepatotoxicity in mice by oral exposure; the mechanism is related to oxidative stress, inflammation, and Toll-like receptor 4 signaling pathway activation.
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Yuan X, Meng D, Cao P, Sun L, Pang Y, Li Y, Wang X, Luo Z, Zhang L, Liu G. Identification of pathogenic genes and transcription factors in vitiligo. Dermatol Ther 2019; 32:e13025. [PMID: 31306558 DOI: 10.1111/dth.13025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/01/2019] [Accepted: 07/11/2019] [Indexed: 12/21/2022]
Abstract
Our study aimed to identify the key genes and upstream regulators in vitiligo. To screen the pathogenic genes of vitiligo, an integrated analysis was performed by using the microarray datasets in vitiligo derived from the Gene Expression Omnibus (GEO) database. The functional annotation and potential pathways of differentially expressed genes (DEGs) were further explored by Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses. We constructed a vitiligo-specific transcriptional regulatory network to identify crucial transcriptional factors that target the DEGs in vitiligo. From two GEO datasets, we identified 1863 DEGs (744 downregulated DEGs and 1,119 upregulated DEGs [false discovery rate < 0.05, |Combined.ES| > 1]) between lesional tissues and nonlesional tissues. GO and KEGG analyses revealed that ubiquitin-mediated proteolysis and the endoplasmic reticulum were significantly enriched pathways for DEGs. The expressions of premelanosome (PMEL), melan-A (MLANA), dopachrome tautomerase (DCT), SRY-boxtranscription factor 10 (SOX10), tyrosinase-related protein 1 (TYRP1), and melanocortin 1 receptor (MC1R) were shown to be involved in the pathogenesis of vitiligo. We concluded that PMEL, MLANA), DCT, SOX10, TYRP1, and MC1R may play a role in vitiligo, among which TYRP1 and MC1R are regulated by forkhead box J2 (FOXJ2). Our finding may contribute to the development of new potential biomarkers, reveal the underlying pathogenesis of vitiligo, and identify novel therapeutic targets for vitiligo.
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Affiliation(s)
- Xiangfeng Yuan
- Department of Dermatology, Shandong University, Jinan, Shandong, China.,Department of Dermatology, Weifang Medical University Hospital, Weifang, Shandong, China
| | - Dan Meng
- Weifang Medical University, Weifang, Shandong, China
| | - Peihua Cao
- Department of Dermatology, Weifang Medical University Hospital, Weifang, Shandong, China
| | - Lina Sun
- Department of Dermatology, Weifang Medical University Hospital, Weifang, Shandong, China
| | - Yunyan Pang
- Department of Dermatology, Weifang Medical University Hospital, Weifang, Shandong, China
| | - Yuan Li
- Department of Dermatology, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Xing Wang
- Department of Dermatology, Weifang Medical University Hospital, Weifang, Shandong, China
| | - Zengxiang Luo
- Department of Dermatology, Weifang Medical University Hospital, Weifang, Shandong, China
| | - Li Zhang
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, Shandong, China
| | - Guoyan Liu
- Department of Dermatology, Weifang Medical University Hospital, Weifang, Shandong, China
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Speeckaert R, Dugardin J, Lambert J, Lapeere H, Verhaeghe E, Speeckaert MM, van Geel N. Critical appraisal of the oxidative stress pathway in vitiligo: a systematic review and meta-analysis. J Eur Acad Dermatol Venereol 2018; 32:1089-1098. [PMID: 29341310 DOI: 10.1111/jdv.14792] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 12/13/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND The pathogenesis of vitiligo remains a topic of extensive debate. This is partly due to the moderate efficacy of current treatments. The role of the oxidative stress pathway in vitiligo is a popular although controversial research topic. OBJECTIVE To clarify the role of the oxidative stress pathway in vitiligo compared to other inflammatory skin disorders and to assess the therapeutic role of antioxidants. METHODS We conducted a systematic search of the existing literature on the aberrancies of the oxidative stress pathway in vitiligo. Subsequently, the efficacy of both topical and oral antioxidants in clinical trials was investigated. RESULTS A deregulated oxidative pathway is clearly evident with elevated superoxide dismutase, decreased catalase and increased lipid peroxidation. However, similar results have been obtained in other inflammatory skin diseases such as psoriasis, atopic dermatitis, lichen planus and urticaria. This questions the unique role of oxidative stress in the development of vitiligo. Some isolated successes have been reported with oral ginkgo biloba, polypodium leucotomos and vitamin C and E preparations, while other clinical trials have failed to show reproducible results. The use of topical antioxidants delivers in general no beneficial results. CONCLUSION The oxidative pathway is affected in vitiligo, but its unique initiating or contributory role in the pathogenesis is less evident. Interesting data support the added value of oral antioxidants in vitiligo although confirmatory studies are missing.
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Affiliation(s)
- R Speeckaert
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - J Dugardin
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - J Lambert
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - H Lapeere
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - E Verhaeghe
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - M M Speeckaert
- Department of Internal Medicine, Ghent University Hospital, Ghent, Belgium
| | - N van Geel
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
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Choi H, Kim M, Lee J. Effect of Polar and Non‐Polar Compounds from Oxidized Oils on Oxidative Stability in Corn Oil. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201700312] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- HyungSeok Choi
- Department of Food Science and Biotechnology, Sungkyunkwan University2066 Seobu‐ro, Jangan‐gu, SowonGyeonggi‐do 16419Republic of Korea
| | - Mi‐Ja Kim
- Department of Food and Nutrition, Kangwon National UniversitySamcheokRepublic of Korea
| | - JaeHwan Lee
- Department of Food Science and Biotechnology, Sungkyunkwan University2066 Seobu‐ro, Jangan‐gu, SowonGyeonggi‐do 16419Republic of Korea
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Mitra S, De Sarkar S, Pradhan A, Pati AK, Pradhan R, Mondal D, Sen S, Ghosh A, Chatterjee S, Chatterjee M. Levels of oxidative damage and proinflammatory cytokines are enhanced in patients with active vitiligo. Free Radic Res 2017; 51:986-994. [DOI: 10.1080/10715762.2017.1402303] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Sneha Mitra
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Sritama De Sarkar
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Ayan Pradhan
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Ayan K. Pati
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Richeek Pradhan
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Debolina Mondal
- Department of Dermatology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Sumit Sen
- Department of Dermatology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Arghyaprasun Ghosh
- Department of Dermatology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Suparna Chatterjee
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Mitali Chatterjee
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
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Oxidation products are increased in patients affected by non-segmental generalized vitiligo. Arch Dermatol Res 2017; 309:485-490. [PMID: 28551758 DOI: 10.1007/s00403-017-1746-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/05/2017] [Accepted: 05/17/2017] [Indexed: 10/19/2022]
Abstract
Several lines of evidence support the relevance of reactive oxygen species (ROS) in vitiligo, but the exact role of glycation and oxidation of macromolecules needs to be better addressed. To investigate the involvement of advanced oxidation protein products (AOPPs) and advanced glycation end-products (AGEs), we performed a case-control association study by spectrofluorimetry and spectrophotometry, in 47 patients with non-segmental generalized vitiligo and 47 age- and sex-matched controls. Significantly higher levels of both AOPPs (p < 0.0001) and AGEs (p < 0.0001) were observed in vitiligo patients compared to healthy controls. In vitiligo patients, AGEs and AOPPs serum levels were directly associated with extension, duration of vitiligo, and disease activity. ROS, and in particular AGEs and AOPPs, could represent one of the main biomarkers to assess the onset and progression of vitiligo, due to the potential role as direct inducers of cell damage and also as autoimmunity triggers. Further longitudinal studies involving larger cohorts of patients are required to elucidate the role of oxidation products in the pathogenesis of vitiligo.
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Shah A, Amini-Nik S. The Role of Phytochemicals in the Inflammatory Phase of Wound Healing. Int J Mol Sci 2017; 18:ijms18051068. [PMID: 28509885 PMCID: PMC5454978 DOI: 10.3390/ijms18051068] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 05/10/2017] [Accepted: 05/13/2017] [Indexed: 12/12/2022] Open
Abstract
Historically, plant-based products have been the basis of medicine since before the advent of modern Western medicine. Wound dressings made of honey, curcumin and other phytochemical-rich compounds have been traditionally used. Recently, the mechanisms behind many of these traditional therapies have come to light. In this review, we show that in the context of wound healing, there is a global theme of anti-inflammatory and antioxidant phytochemicals in traditional medicine. Although promising, we discuss the limitations of using some of these phytochemicals in order to warrant more research, ideally in randomized clinical trial settings.
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Affiliation(s)
- Ahmed Shah
- Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada.
| | - Saeid Amini-Nik
- Department of Surgery, University of Toronto, Toronto, ON M5S 1A8, Canada.
- Department of Laboratory Medicine and Pathobiology (LMP), University of Toronto, Toronto, ON M5S 1A8, Canada.
- Sunnybrook Research Institute, Sunnybrook Health Science Centre, Toronto, ON M5S 1A8, Canada.
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Analysis of Manganese Superoxide Dismutase and Glutathione Peroxidase 1 Gene Polymorphisms in Vitiligo. Biochem Genet 2016; 54:438-447. [PMID: 27100222 DOI: 10.1007/s10528-016-9730-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 04/12/2016] [Indexed: 10/21/2022]
Abstract
Vitiligo is a hereditary/acquired progressive pigmentation disorder characterized by discoloration of skin as a result of melanocyte dysfunction. Recent studies have proposed that oxidant/antioxidant status plays an important role in vitiligo pathogenesis because of the toxic effects on melanocytes. In this study, we aimed to investigate possible associations of MnSOD Ala-9Val and GPx1 Pro198Leu polymorphisms with vitiligo with in Turkish population. The study group consists of 57 patients with vitiligo and 69 healthy controls. Genotyping is performed to identify MnSOD Ala-9Val and GPx1 Pro198Leu polymorphisms. The method used for genotyping was based on the PCR amplification and detection of polymorphisms by hybridization probes labeled with fluorescent dyes. Both the genotype and allele frequencies of MnSOD Ala-9Val (p = 0.817 and p = 0.553, respectively) and GPx1 Pro198Leu polymorphisms (p = 0.422 and p = 0.673, respectively) were not significantly different between vitiligo patients and the control group. Although no significant difference was found, this is the first report investigating the possible associations between the MnSOD Ala-9Val and GPx1 Pro198Leu polymorphisms in Turkish population. Further studies with large populations will be able to clarify the association better.
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Efficacy and Safety of 308-nm Monochromatic Excimer Lamp Versus Other Phototherapy Devices for Vitiligo: A Systematic Review with Meta-Analysis. Am J Clin Dermatol 2016; 17:23-32. [PMID: 26520641 DOI: 10.1007/s40257-015-0164-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Various phototherapy methods are used to treat vitiligo; however, the recent emergence of new devices has heightened debate concerning the best treatment method. OBJECTIVE We aimed to systematically review and meta-analyze published data comparing the efficacy and adverse effects of monochromatic excimer lamps versus excimer laser and narrowband ultraviolet B (NB-UVB) in treating vitiligo. METHODS A systematic search of PubMed, EMBASE, LILACS, Cochrane Central Register of Controlled Trials (CENTRAL), and clinical trials registries identified randomized controlled trials that included vitiligo patients, regardless of age, sex, or study language. We evaluated studies comparing excimer lamps with excimer laser or NB-UVB phototherapy. RESULTS The review included six studies (411 patients, 764 lesions). No study found significantly different efficacy between excimer lamps and excimer laser using the outcomes of ≥50% repigmentation [risk ratio (RR) = 0.97, 95% confidence interval (CI) 0.84-1.11] and ≥75% repigmentation (RR = 0.96, 95% CI 0.71-1.30). Likewise, no study found significant differences between excimer lamps and NB-UVB (RR = 1.14, 95% CI 0.88-1.48 for ≥50% repigmentation; RR = 1.81, 95% CI 0.11-29.52 for ≥75% repigmentation). Adverse effects were mild, including pruritus, burning sensation, and dryness, none of which interrupted treatment. CONCLUSIONS To our knowledge, this is the first systematic review of the efficacy and safety of excimer lamp treatment for vitiligo. Excimer lamps, excimer laser, and NB-UVB are all safe and effective in repigmentation of vitiligo lesions. Safety, effectiveness, and cost are considerations when choosing treatment. PROSPERO REGISTRATION NUMBER CRD42014015237.
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Immunological Parameters Associated With Vitiligo Treatments: A Literature Review Based on Clinical Studies. Autoimmune Dis 2015; 2015:196537. [PMID: 26457199 PMCID: PMC4589577 DOI: 10.1155/2015/196537] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 08/26/2015] [Indexed: 12/04/2022] Open
Abstract
Vitiligo, a depigmentary disorder, caused by the loss of melanocytes, affects approximately 1% of the world population, irrespective of skin type, with a serious psychological impact on the patient quality of life. So far, the origin of vitiligo has not been traced and the pathogenesis is complex, involving the interplay of a multitude of variables. Although there is no treatment that ensures the complete cure of the disorder, there are some pharmacological, phototherapy, and surgical therapies available. A series of variables can affect treatment outcome, such as individual characteristics, emotional issues, type of vitiligo, stability of the lesions, and immunological status. The present literature review identified the main immunological parameters associated with treatments for vitiligo. Cytotoxic CD8+ T lymphocytes are the main cell type involved in treatment success, as fewer cells in skin lesions are associated with better results. Other parameters such as cytokines and regulatory T cells may also be involved. Further clinical scientific studies are needed to elucidate the complex mechanisms underlying vitiligo and its treatments, in order to expand the range of therapeutic approaches for each individual case.
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