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Liu Z, Mi J, Wu H. Relationships between circulating metabolites and facial skin aging: a Mendelian randomization study. Hum Genomics 2023; 17:23. [PMID: 36927485 PMCID: PMC10022075 DOI: 10.1186/s40246-023-00470-y] [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: 11/07/2022] [Accepted: 03/08/2023] [Indexed: 03/18/2023] Open
Abstract
BACKGROUND Blood metabolites are important to various aspects of our health. However, currently, there is little evidence about the role of circulating metabolites in the process of skin aging. OBJECTIVES To examine the potential effects of circulating metabolites on the process of skin aging. METHOD In the primary analyses, we applied several MR methods to study the associations between 249 metabolites and facial skin aging risk. In the secondary analyses, we replicated the analyses with another array of datasets including 123 metabolites. MR Bayesian model averaging (MR-BMA) method was further used to prioritize the metabolites for the identification of predominant metabolites that are associated with skin aging. RESULTS In the primary analyses, only the unsaturation degree of fatty acids was found significantly associated with skin aging with the IVW method after multiple testing (odds ratio = 1.084, 95% confidence interval = 1.049-1.120, p = 1.737 × 10-06). Additionally, 11 out of 17 unsaturation-related biomarkers showed a significant or suggestively significant causal effect [p < 0.05 and > 2 × 10-4 (0.05/249 metabolites)]. In the secondary analyses, seven metabolic biomarkers were found significantly associated with skin aging [p < 4 × 10-4 (0.05/123)], while six of them were related to the unsaturation degree. MR-BMA method validated that the unsaturation degree of fatty acids plays a dominant role in facial skin aging. CONCLUSIONS Our study used systemic MR analyses and provided a comprehensive atlas for the associations between circulating metabolites and the risk of facial skin aging. Genetically proxied unsaturation degree of fatty acids was highlighted as a dominant factor correlated with the risk of facial skin aging.
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Affiliation(s)
- Zhengye Liu
- Department of Plastic and Aesthetic Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jiarui Mi
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Huiling Wu
- Department of Plastic and Aesthetic Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
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Lubov JE, Jamison AS, Baltich Nelson B, Amudzi AA, Haas KN, Richmond JM. Medicinal Plant Extracts and Natural Compounds for the Treatment of Cutaneous Lupus Erythematosus: A Systematic Review. Front Pharmacol 2022; 13:802624. [PMID: 35431950 PMCID: PMC9008762 DOI: 10.3389/fphar.2022.802624] [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: 10/26/2021] [Accepted: 01/17/2022] [Indexed: 12/19/2022] Open
Abstract
Cutaneous lupus erythematosus (CLE) is a group of autoimmune connective tissue disorders that significantly impact quality of life. Current treatment approaches typically use antimalarial medications, though patients may become recalcitrant. Other treatment options include general immunosuppressants, highlighting the need for more and more targeted treatment options. The purpose of this systematic review was to identify potential compounds that could be repurposed for CLE from natural products since many rheumatologic drugs are derived from natural products, including antimalarials. This study was registered with PROSPERO, the international prospective register of systematic reviews (registration number CRD42021251048). We comprehensively searched Ovid Medline, Cochrane Library, and Scopus databases from inception to April 27th, 2021. These terms included cutaneous lupus erythematosus; general plant, fungus, bacteria terminology; selected plants and plant-derived products; selected antimalarials; and JAK inhibitors. Our search yielded 13,970 studies, of which 1,362 were duplicates. We screened 12,608 abstracts, found 12,043 to be irrelevant, and assessed 565 full-text studies for eligibility. Of these, 506 were excluded, and 59 studies were included in the data extraction. The ROBINS-I risk of bias assessment tool was used to assess studies that met our inclusion criteria. According to our findings, several natural compounds do reduce inflammation in lupus and other autoimmune skin diseases in studies using in vitro methods, mouse models, and clinical observational studies, along with a few randomized clinical trials. Our study has cataloged evidence in support of potential natural compounds and plant extracts that could serve as novel sources of active ingredients for the treatment of CLE. It is imperative that further studies in mice and humans are conducted to validate these findings. Systematic Review Registration:https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=251048.
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Affiliation(s)
- Janet E. Lubov
- Department of Dermatology, UMass Chan Medical School, Worcester, MA, United States
- Wright State University Boonshoft School of Medicine, Dayton, OH, United States
- *Correspondence: Janet E. Lubov, ; Jillian M. Richmond,
| | - Aisha S. Jamison
- Department of Dermatology, UMass Chan Medical School, Worcester, MA, United States
- Wright State University Boonshoft School of Medicine, Dayton, OH, United States
| | | | - Alice A. Amudzi
- Department of Dermatology, UMass Chan Medical School, Worcester, MA, United States
| | - Kelly N. Haas
- Department of Microbiology, UMass Amherst, Amherst, MA, United States
| | - Jillian M. Richmond
- Department of Dermatology, UMass Chan Medical School, Worcester, MA, United States
- *Correspondence: Janet E. Lubov, ; Jillian M. Richmond,
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Abstract
Nutrition and dietary supplements have been used to promote a youthful appearance for millennia. Despite high public demand for these products, evidence supporting their efficacy is limited and often inconsistent. We discuss the structural and functional changes that occur in the skin during the aging process. We also review evidence supporting the use of nutritional supplements commonly used to promote a youthful appearance, including essential fatty acids, coenzyme Q, collagen peptides, curcumin, polyphenols, flavonoids, probiotics, silymarin, and vitamins A, C, D, and E. We also consider the role of advanced glycosylated end products, antiinflammatory diets, and caloric restriction in delaying premature skin aging. Although evidence supporting the use of some dietary interventions is promising, further long-term studies in humans are required to fully understand their effects on the promotion of a youthful appearance.
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Affiliation(s)
- Sonal Muzumdar
- University of Connecticut School of Medicine, Farmington, Connecticut, USA
| | - Katalin Ferenczi
- Department of Dermatology, University of Connecticut School of Medicine, Farmington, Connecticut, USA.
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Wang P, Yan G, Xue H, Shen S, Cao Y, Zhang G, Wang X. Proteomics and lipidomics reveal the protective mechanism of dietary n-3 PUFA supplementation for photoaging. Food Funct 2021; 12:7883-7896. [PMID: 34241612 DOI: 10.1039/d0fo03228j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chronic ultraviolet radiation exposure could induce photoaging, and even carcinogenesis. Dietary omega-3 polyunsaturated fatty acid (n-3 PUFA) supplementation has proved to alleviate photoaging and cutaneous carcinoma. Although the exact mechanism remains poorly elucidated, accumulated evidence suggests that the alleviation effect of n-3 PUFA for photoaging is a multifactorial procession characterized by different pathways. Here, we performed a whole-genome proteomics and lipidomics analyses using a self-constructed photoaging mouse model with n-3 PUFA or n-6 PUFA supplementation. Significant alleviation of photoaging was observed, and a total of 88 differentially expressed proteins and 152 differentially expressed lipids were identified in mice with n-3 PUFA supplementation. We found that n-3 PUFA may alleviate photoaging by upregulating Hmmr (hyaluronic acid receptor) expression, which can decrease Mmp9 expression, reducing collagen degradation. As most proteins were associated with lipogenesis and lipid metabolism, we further analyzed the lipidomics data, finding that most triglycerides (93%) showed a significant increase in the n-3 PUFA supplementation group. Our proteomics and lipidomics results indicate that the protective mechanism of n-3 PUFA for photoaging is complicated. Furthermore, the effect of elevated triglycerides by n-3 PUFA supplementation in counteracting skin photoaging cannot be ignored, which will become a new prime target in anti-photoaging.
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Affiliation(s)
- Peiru Wang
- Institute of Photomedicine, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China.
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Gruber-Wackernagel A, Schug T, Graier T, Legat FJ, Rinner H, Hofer A, Quehenberger F, Wolf P. Long-Term Course of Polymorphic Light Eruption: A Registry Analysis. Front Med (Lausanne) 2021; 8:694281. [PMID: 34336899 PMCID: PMC8323194 DOI: 10.3389/fmed.2021.694281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/11/2021] [Indexed: 12/17/2022] Open
Abstract
Background: Little is known about the long-term course of polymorphic light eruption (PLE). Objective: To predict disease course, a questionnaire was sent to patients whose PLE had been diagnosed between March 1990 and December 2018 and documented in the Austrian Cooperative Registry for Photodermatoses. Methods: In January 2019, 205 PLE patients were contacted by mail and asked to complete a questionnaire on their disease course, including whether the skin's sun sensitivity had normalized (i.e., PLE symptoms had disappeared), improved, stayed the same, or worsened over time. Patients who reported normalization of sun sensitivity were asked to report when it had occurred. Results: Ninety-seven patients (79 females, 18 males) returned a completed questionnaire. The mean (range) duration of follow-up from PLE onset was 29.6 (17–54) years for females and 29.4 (16–47) years for males. The disease disappeared in 32 (41%) females after 17.4 (2–41) years and in 4 (24%) males after 11.8 (5–26) years. Twenty-nine (37%) females and 6 (35%) males reported improvement of symptoms over time; 15 females (19%) and 7 males (41%) reported no change; and 3 females (4%) and no males reported worsening of symptoms. Kaplan-Meier analysis revealed that after 20 years 74% (95%CI, 64–82%) of patients still suffered from PLE. PLE lesion persistence (>1 week) tended to predict a prolonged course of PLE. Conclusions: PLE usually takes a long-term course over many years though in most patients its symptoms improve or disappear over time. How improvement relates to the pathophysiology of the disease remains to be determined.
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Affiliation(s)
| | - Tanja Schug
- Research Unit for Photodermatology, Department of Dermatology, Medical University of Graz, Graz, Austria
| | - Thomas Graier
- Research Unit for Photodermatology, Department of Dermatology, Medical University of Graz, Graz, Austria
| | - Franz J Legat
- Research Unit for Photodermatology, Department of Dermatology, Medical University of Graz, Graz, Austria
| | - Hanna Rinner
- Research Unit for Photodermatology, Department of Dermatology, Medical University of Graz, Graz, Austria
| | - Angelika Hofer
- Research Unit for Photodermatology, Department of Dermatology, Medical University of Graz, Graz, Austria
| | - Franz Quehenberger
- Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria
| | - Peter Wolf
- Research Unit for Photodermatology, Department of Dermatology, Medical University of Graz, Graz, Austria
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6
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Karthikeyan K, Aishwarya M. Polymorphous Light Eruption- An Indian Scenario. Indian Dermatol Online J 2021; 12:211-219. [PMID: 33959517 PMCID: PMC8088173 DOI: 10.4103/idoj.idoj_434_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/20/2020] [Accepted: 10/20/2020] [Indexed: 02/05/2023] Open
Abstract
Polymorphous light eruption (PMLE) is the most common, idiopathic, acquired photodermatosis, characterized by abnormal, recurrent, and delayed reaction to sunlight. Polymorphous light eruption is common worldwide but the morphology, distribution, and pigmentary changes are unique in Indian skin which is discussed in this review. The prevalence of PMLE is around 10–20% in the general population. It commonly occurs in females between 20and 30 years of age. It is the most common photodermatosis in school-going children. Visible light sensitivity is an important phenomenon in PMLE. It typically presents as recurrent and chronic lesions over photoexposed sites. Initially, patchy erythema occurs with pruritus. Most of the Indians belong to type IV to type VI skin and pigmentary changes are commonly seen. The unique feature of PMLE in Indian skin is the pigmentary change which varies from hypopigmented to hyperpigmented lesions. These pigmentary changes may occur alone or in combination with erythematous or skin-colored lesions. The pigmentary lesions are seen in more than 50% of lesions. The histopathology of PMLE is characterized by the presence of hyperkeratosis, spongiosis with or without the presence of liquefactive degeneration in the epidermis. Dermal changes in the upper and mid dermis include the presence of dense perivascular lymphocytic infiltrate. The management of PMLE includes both preventive measures and medical management. Topical sunscreens, topical steroids, hydroxychloroquine and antioxidants play a very important role.
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Affiliation(s)
- Kaliaperumal Karthikeyan
- Department of Dermatology, Venereology and Leprosy, Sri ManakulaVinayagar Medical College and Hospital, Madagadipet, Pondicherry, India
| | - Manju Aishwarya
- Department of Dermatology, Venereology and Leprosy, Pondicherry Institute of Medical Sciences, Pondicherry, India
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Thomsen BJ, Chow EY, Sapijaszko MJ. The Potential Uses of Omega-3 Fatty Acids in Dermatology: A Review. J Cutan Med Surg 2020; 24:481-494. [PMID: 32463305 DOI: 10.1177/1203475420929925] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND A growing interest exists in the relationship between diet and skin disease, with many recent studies identifying a role for omega-3 fatty acids (O3FAs) in various dermatological conditions. OBJECTIVE Our objective was to identify the spectrum of uses for O3FA supplementation reported in literature and to evaluate the current level of evidence for its clinical application in skin disease prevention and management. METHODS A search was conducted using Ovid MEDLINE for primary literature that examined O3FA intake and skin health. A manual search of reference lists was performed to identify additional articles for inclusion. RESULTS A total of 38 studies met eligibility for review, reporting benefits for O3FA supplementation in the treatment of psoriasis, atopic dermatitis, acne, and skin ulcers. Additionally, a reduced incidence of skin cancer and a decrease in the severity of drug-associated mucocutaneous side effects were reported with O3FA supplementation. CONCLUSION This review yielded many well-studied benefits of O3FA uses in dermatology. Given its high safety profile, low cost, and ease of supplementation, O3FA is a reasonable supplement that may benefit patients wishing to improve inflammatory skin conditions through diet. Areas of particular clinical interest where supplementation may be valuable include O3FAs for systemic UV photoprotection, as well as adjuvant treatment for acne to reduce both inflammatory lesion count and the severity of mucocutaneous side effects associated with isotretinoin use.
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Affiliation(s)
- Bryce J Thomsen
- 3158 University of Alberta Faculty of Medicine and Dentistry, Edmonton, AB, Canada
| | - Eunice Y Chow
- Division of Dermatology, University of Alberta Faculty of Medicine and Dentistry, Edmonton, AB, Canada
| | - Mariusz J Sapijaszko
- Division of Dermatology, University of Alberta Faculty of Medicine and Dentistry, Edmonton, AB, Canada
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8
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Zaid AN, Al Ramahi R. Depigmentation and Anti-aging Treatment by Natural Molecules. Curr Pharm Des 2020; 25:2292-2312. [PMID: 31269882 DOI: 10.2174/1381612825666190703153730] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 06/20/2019] [Indexed: 11/22/2022]
Abstract
Natural molecules are becoming more accepted choices as cosmetic agents, many products in the market today claim to include natural components. Plants include many substances that could be of a value in the whitening of the skin and working as anti-aging agents. A wide range of articles related to natural skin whitening and anti-aging agents have been reviewed. Many plant-derived and natural molecules have shown to affect melanin synthesis by different mechanisms, examples include Arbutin, Ramulus mori extract, Licorice extract, Glabridin, Liquiritin, Kojic acid, Methyl gentisate, Aloesin, Azelaic acid, Vitamin C, Thioctic acid, Soya bean extracts, Niacinamide, α and β-hydroxy acids, Lactic acid, Chamomile extract, and Ellagic acid. Some of the widely used natural anti-aging products as natural antioxidants, collagen, hyaluronic acid, and coenzyme Q can counteract the effects of reactive oxygen species in skin cells and have anti-aging properties on the skin. It was concluded that many natural products including antioxidants can prevent UV-induced skin damage and have whitening and anti-aging effects. It is very important to develop and stabilize appropriate methods for the evaluation of the whitening and anti-aging capacity of natural products and their exact mechanism of action to ensure real efficacy based on evidence-based studies. The attention should be oriented on the formulations and the development of an appropriate vehicle to ensure suitable absorption of these natural products in addition to evaluating the suitable concentration of these molecules required having the desired effects without causing harmful side effects.
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Affiliation(s)
- Abdel Naser Zaid
- Pharmacy Department, Faculty of Medicine and Health Sciences, An-Najah National University, Nablus, Palestinian Territory, Occupied
| | - Rowa' Al Ramahi
- Pharmacy Department, Faculty of Medicine and Health Sciences, An-Najah National University, Nablus, Palestinian Territory, Occupied
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9
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Tse BCY, Byrne SN. Lipids in ultraviolet radiation-induced immune modulation. Photochem Photobiol Sci 2020; 19:870-878. [DOI: 10.1039/d0pp00146e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Ultraviolet (UV) radiation modulates cutaneous lipids which in turn mediates immune suppression – a key mechanism conferring both detrimental and beneficial impacts of sun exposure on human health.
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Affiliation(s)
- Benita C. Y. Tse
- The University of Sydney
- School of Medical Sciences
- Faculty of Medicine and Health
- Sydney
- Australia
| | - Scott N. Byrne
- The University of Sydney
- School of Medical Sciences
- Faculty of Medicine and Health
- Sydney
- Australia
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Huang TH, Wang PW, Yang SC, Chou WL, Fang JY. Cosmetic and Therapeutic Applications of Fish Oil's Fatty Acids on the Skin. Mar Drugs 2018; 16:E256. [PMID: 30061538 PMCID: PMC6117694 DOI: 10.3390/md16080256] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/20/2018] [Accepted: 07/28/2018] [Indexed: 02/07/2023] Open
Abstract
Fish oil has been broadly reported as a potential supplement to ameliorate the severity of some skin disorders such as photoaging, skin cancer, allergy, dermatitis, cutaneous wounds, and melanogenesis. There has been increasing interest in the relationship of fish oil with skin protection and homeostasis, especially with respect to the omega-3 polyunsaturated fatty acids (PUFAs), docosahexaenoic acid (DHA), and eicosapentaenoic acid (EPA). The other PUFAs, such as α-linolenic acid (ALA) and linoleic acid (LA), also show a beneficial effect on the skin. The major mechanisms of PUFAs for attenuating cutaneous inflammation are the competition with the inflammatory arachidonic acid and the inhibition of proinflammatory eicosanoid production. On the other hand, PUFAs in fish oil can be the regulators that affect the synthesis and activity of cytokines for promoting wound healing. A systemic review was conducted to demonstrate the association between fish oil supplementation and the benefits to the skin. The following describes the different cosmetic and therapeutic approaches using fatty acids derived from fish oil, especially ALA, LA, DHA, and EPA. This review summarizes the cutaneous application of fish oil and the related fatty acids in the cell-based, animal-based, and clinical models. The research data relating to fish oil treatment of skin disorders suggest a way forward for generating advances in cosmetic and dermatological uses.
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Affiliation(s)
- Tse-Hung Huang
- Department of Traditional Chinese Medicine, Chang Gung Memorial Hospital at Keelung, Keelung 20401, Taiwan.
- School of Traditional Chinese Medicine, Chang Gung University, Kweishan, Taoyuan 33303, Taiwan.
- School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei 11219, Taiwan.
| | - Pei-Wen Wang
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40402, Taiwan.
| | - Shih-Chun Yang
- Department of Cosmetic Science, Providence University, Taichung 43301, Taiwan.
| | - Wei-Ling Chou
- Department of Traditional Chinese Medicine, Chang Gung Memorial Hospital at Keelung, Keelung 20401, Taiwan.
| | - Jia-You Fang
- Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, Kweishan, Taoyuan 33302, Taiwan.
- Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University, Kweishan, Taoyuan 33302, Taiwan.
- Research Center for Food and Cosmetic Safety and Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Kweishan, Taoyuan 33302, Taiwan.
- Department of Anesthesiology, Chang Gung Memorial Hospital at Linkou, Kweishan, Taoyuan 33305, Taiwan.
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12
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Morse NL, Reid AJ, St-Onge M. An open-label clinical trial assessing the efficacy and safety of Bend Skincare Anti-Aging Formula on minimal erythema dose in skin. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2017; 34:152-161. [PMID: 28884844 DOI: 10.1111/phpp.12350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/31/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND/PURPOSE Sunburn and other health risks associated with excess sun exposure place huge economic burdens on societies, and create discomfort and disease within susceptible individuals. Oral supplements that reduce sunburn may be advantageous. This study evaluated the safety and efficacy of Bend Skincare Anti-Aging Formula to ameliorate sunburn induced with a solar simulator. METHODS Subjects (n = 28) with Fitzpatrick skin phototypes I, II, or III took 4 capsules daily of the supplement providing 1400 mg of eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA), 120 mg of gamma-linolenic acid (GLA), 5 mg of lutein, 2.5 mg of zeaxanthin, and 1000 IU of vitamin D3 for 8 weeks. Skin on each subject's back was exposed to a progressive sequence of timed ultraviolet (UV) radiation exposure doses at baseline, and after 4- and 8-week treatment to determine their minimal erythema dose (MED). Results were compared before and after treatment using 3 paired t tests and subsequently 3 linear mixed models. RESULTS Treatment significantly improved tolerance to UV exposure as evidenced by increased MED at 4 and 8 weeks compared with baseline (P < .001). This protection increased with prolonged use of Bend Skincare Anti-Aging Formula as demonstrated by progressively increased MED between baseline and 4 weeks, and again between 4 and 8 weeks (P < .001). Nearly 86% of patients responded to treatment within 4 weeks and 100% of patients responded by the end of the study, resulting in a 39% mean increase in MED at 4 weeks, and an 84% mean increase in MED at 8 weeks compared with baseline. Treatment was well tolerated with no product associated adverse events (AE) and only a few mild and expected side effects. CONCLUSION Bend Skincare Anti-Aging Formula safely and effectively provides significant skin photoprotection that increases with continued use.
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Affiliation(s)
- Nancy L Morse
- Independent Scientific Consultant, Berwick, NS, Canada
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13
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Black HS. Reassessment of a Free Radical Theory of Cancer With Emphasis on Ultraviolet Carcinogenesis. Integr Cancer Ther 2016; 3:279-93. [PMID: 15523099 DOI: 10.1177/1534735404270612] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Pro-oxidants, reactive species and free radicals, are toxic substances that can cause oxidative damage to major constituents of biological systems. In contradistinction, antioxidants are defined as any substance that significantly prevents the pro-oxidant-initiated oxidation of a substrate. Consequently, it was suggested that it might be possible to reduce free radical damage and thus cancer risk through 3 dietary changes: (1) caloric reduction, that is, lowering the level of free radical reactions arising in the course of normal metabolism; (2) minimize dietary components that increase the level of free radical reactions (eg, polyunsaturated fats); and (3) supplement the diet with one or more free radical reaction inhibitors (antioxidants). Lipid peroxidation exemplifies the type of chain reaction initiated by free radicals in (2) and (3). Both the phenolic antioxidant butylated hydroxytoluene (BHT) and the carotenoid β-carotene can terminate such reactions and have been shown to influence ultraviolet (UV) carcinogenesis. However, there is a lack of correlation between physicochemical and patho-physiological responses in both instances. Whereas the influence on UV carcinogenesis of both antioxidants has been reported to diminish as the level of dietary fat decreases, pointing to the involvement of lipid peroxidative reactions, the mode of BHT’s action in inhibiting UV carcinogenesis appears to be related to UV dose diminution through increased spectral absorbance of the stratum corneum. β-carotene has no such effect and may actually exacerbate UV carcinogenesis under certain dietary conditions. This paradox points to the complex relationship between chemical mechanisms and biological mode of action of antioxidants. Recent clinical and experimental data suggest that antioxidant supplementation of the complex and intricately balanced natural antioxidant defense system as a cancer prevention strategy will demand extreme caution.
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Affiliation(s)
- Homer S Black
- Department of Dermatology, Baylor College of Medicine, Houston, Texas, USA.
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Ling T, Clayton T, Crawley J, Exton L, Goulden V, Ibbotson S, McKenna K, Mohd Mustapa M, Rhodes L, Sarkany R, Dawe R, McHenry P, Hughes J, Griffiths M, McDonagh A, Buckley D, Nasr I, Swale V, Duarte Williamson C, Levell N, Leslie T, Mallon E, Wakelin S, Hunasehally P, Cork M, Ungureanu S, Donnelly J, Towers K, Saunders C, Davis R, Brain A, Exton L, Mohd Mustapa M. British Association of Dermatologists and British Photodermatology Group guidelines for the safe and effective use of psoralen–ultraviolet A therapy 2015. Br J Dermatol 2016; 174:24-55. [DOI: 10.1111/bjd.14317] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2015] [Indexed: 01/28/2023]
Affiliation(s)
- T.C. Ling
- Dermatology Centre Faculty of Medical and Human Sciences Salford Royal NHS Foundation Trust Salford Manchester M6 8HD U.K
| | - T.H. Clayton
- Dermatology Centre Faculty of Medical and Human Sciences Salford Royal NHS Foundation Trust Salford Manchester M6 8HD U.K
| | - J. Crawley
- Department of Dermatology University College Hospital 235 Euston Road London NW1 2BU U.K
| | - L.S. Exton
- British Association of Dermatologists Willan House 4 Fitzroy Square London W1T 5HQ U.K
| | - V. Goulden
- Department of Dermatology Leeds Teaching Hospitals NHS Trust Leeds LS7 4SA U.K
| | - S. Ibbotson
- Department of Dermatology Ninewells Hospital and Medical School University of Dundee Dundee DD1 9SY U.K
| | - K. McKenna
- Department of Dermatology Belfast City Hospital Belfast BT9 7AB U.K
| | - M.F. Mohd Mustapa
- British Association of Dermatologists Willan House 4 Fitzroy Square London W1T 5HQ U.K
| | - L.E. Rhodes
- Dermatology Research Centre Faculty of Medical and Human Sciences Salford Royal NHS Foundation Trust Salford Manchester M6 8HD U.K
| | - R. Sarkany
- Department of Dermatology University College Hospital 235 Euston Road London NW1 2BU U.K
| | - R.S. Dawe
- Department of Dermatology Ninewells Hospital and Medical School University of Dundee Dundee DD1 9SY U.K
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Barcelos RC, de Mello-Sampayo C, Antoniazzi CT, Segat HJ, Silva H, Veit JC, Piccolo J, Emanuelli T, Bürger ME, Silva- Lima B, Rodrigues LM. Oral supplementation with fish oil reduces dryness and pruritus in the acetone-induced dry skin rat model. J Dermatol Sci 2015. [DOI: 10.1016/j.jdermsci.2015.06.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Schalka S, Steiner D, Ravelli FN, Steiner T, Terena AC, Marçon CR, Ayres EL, Addor FAS, Miot HA, Ponzio H, Duarte I, Neffá J, Cunha JAJD, Boza JC, Samorano LDP, Corrêa MDP, Maia M, Nasser N, Leite OMRR, Lopes OS, Oliveira PD, Meyer RLB, Cestari T, Reis VMSD, Rego VRPDA. Brazilian consensus on photoprotection. An Bras Dermatol 2015; 89:1-74. [PMID: 25761256 PMCID: PMC4365470 DOI: 10.1590/abd1806-4841.20143971] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 10/28/2014] [Indexed: 12/14/2022] Open
Abstract
Brazil is a country of continental dimensions with a large heterogeneity of climates
and massive mixing of the population. Almost the entire national territory is located
between the Equator and the Tropic of Capricorn, and the Earth axial tilt to the
south certainly makes Brazil one of the countries of the world with greater extent of
land in proximity to the sun. The Brazilian coastline, where most of its population
lives, is more than 8,500 km long. Due to geographic characteristics and cultural
trends, Brazilians are among the peoples with the highest annual exposure to the sun.
Epidemiological data show a continuing increase in the incidence of non-melanoma and
melanoma skin cancers. Photoprotection can be understood as a set of measures aimed
at reducing sun exposure and at preventing the development of acute and chronic
actinic damage. Due to the peculiarities of Brazilian territory and culture, it would
not be advisable to replicate the concepts of photoprotection from other developed
countries, places with completely different climates and populations. Thus the
Brazilian Society of Dermatology has developed the Brazilian Consensus on
Photoprotection, the first official document on photoprotection developed in Brazil
for Brazilians, with recommendations on matters involving photoprotection.
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Affiliation(s)
- Sérgio Schalka
- Photobiology Department, Sociedade Brasileira de Dermatologia, São Paulo, SP, Brazil
| | | | | | | | | | | | - Eloisa Leis Ayres
- Center of Dermatology Prof. Rene Garrido Neves, City Health Foundation, Rio de Janeiro, RJ, Brazil
| | | | | | - Humberto Ponzio
- Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Ida Duarte
- Charity Hospital, Santa Casa de Misericórdia, São Paulo, SP, Brazil
| | - Jane Neffá
- Fluminense Federal University, Niterói, RJ, Brazil
| | | | | | | | | | - Marcus Maia
- Charity Hospital, Santa Casa de Misericórdia, São Paulo, SP, Brazil
| | - Nilton Nasser
- Federal University of Santa Catarina, Blumenau, SC, Brazil
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Epstein-Barr virus: dermatologic associations and implications: part I. Mucocutaneous manifestations of Epstein-Barr virus and nonmalignant disorders. J Am Acad Dermatol 2015; 72:1-19; quiz 19-20. [PMID: 25497917 DOI: 10.1016/j.jaad.2014.07.034] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 06/23/2014] [Accepted: 07/16/2014] [Indexed: 12/22/2022]
Abstract
Epstein-Barr virus (EBV) is a ubiquitous virus that has been implicated in a wide range of human diseases, many of which have mucocutaneous manifestations. As a member of the herpesviridae family, EBV causes lifelong infection by establishing latency in B lymphocytes. An intact immune response is critical in preventing progression of EBV disease, and the clinical manifestations of infection are dependent on the intricate relationship between virus and host immune system. This review provides a comprehensive overview of the epidemiology, pathophysiology, and diagnostic testing in EBV infection. In part I of this continuing medical education article, the mucocutaneous manifestations of EBV infection are reviewed with an emphasis on pathophysiology and management.
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Chen AC, Damian DL, Halliday GM. Oral and systemic photoprotection. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2014; 30:102-11. [PMID: 24313740 DOI: 10.1111/phpp.12100] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/03/2013] [Indexed: 01/01/2023]
Abstract
Photoprotection can be provided not only by ultraviolet (UV) blockers but also by oral substances. Epidemiologically identified associations between foods and skin cancer and interventional experiments have discovered mechanisms of UV skin damage. These approaches have identified oral substances that are photoprotective in humans. UV inhibits adenosine triphosphate (ATP) production causing an energy crisis, which prevents optimal skin immunity and DNA repair. Enhancing ATP production with oral nicotinamide protects from UV immunosuppression, enhances DNA repair and reduces skin cancer in humans. Reactive oxygen species also contribute to photodamage. Nontoxic substances consumed in the diet, or available as oral supplements, can protect the skin by multiple potential mechanisms. These substances include polyphenols in fruit, vegetables, wine, tea and caffeine-containing foods. UV-induced prostaglandin E2 (PGE2 ) contributes to photodamage. Nonsteroidal anti-inflammatory drugs and food substances reduce production of this lipid mediator. Fish oils are photoprotective, at least partially by reducing PGE2 . Orally consumed substances, either in the diet or as supplements, can influence cutaneous responses to UV. A current research goal is to develop an oral supplement that could be used in conjunction with other sun protective strategies in order to provide improved protection from sunlight.
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Affiliation(s)
- Andrew C Chen
- Discipline of Dermatology, Bosch Institute, Central Clinical School, University of Sydney, Sydney, Australia; Dermatology, Sydney Cancer Centre, Royal Prince Alfred Hospital, Sydney, Australia
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Pilkington SM, Gibbs NK, Friedmann PS, Rhodes LE. Nutritional abrogation of photoimmunosuppression: in vivo investigations. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2014; 30:112-27. [PMID: 24283330 DOI: 10.1111/phpp.12091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/21/2013] [Indexed: 11/28/2022]
Abstract
Skin cancer is a major public health concern, and the primary aetiological factor in the majority of skin cancers is ultraviolet radiation (UVR) exposure. UVR not only induces potentially mutagenic DNA damage but also suppresses cell-mediated immunity (CMI), allowing cancerous cells to escape destruction and progress to tumours. A considerable proportion of an individual's annual sun exposure is obtained outside the vacation period when topical and physical measures for photoprotection are irregularly used. Certain nutrients could provide an adjunctive protective role, and evidence is accruing from experimental studies to support their use in abrogation of photoimmunosuppression. Moreover, developments in clinical research methods to evaluate impact of solar-simulated radiation on cutaneous CMI allow the immune protective potential of nutritional agents to be examined in humans in vivo. This article summarises the mediation of CMI and its suppression by UVR, evaluates the methodology for quantitative assessment in vivo, reviews the human studies reported on nutritional abrogation of photoimmunosuppression including recent randomized controlled trials and discusses the mechanisms of photoprotection by the nutrients. This includes, in addition to antioxidants, novel studies of omega-3 polyunsaturated fatty acids and nicotinamide.
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Affiliation(s)
- Suzanne M Pilkington
- Centre for Dermatology, Institute of Inflammation and Repair, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK
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Noel SE, Stoneham ACS, Olsen CM, Rhodes LE, Green AC. Consumption of omega-3 fatty acids and the risk of skin cancers: a systematic review and meta-analysis. Int J Cancer 2013; 135:149-56. [PMID: 24265065 DOI: 10.1002/ijc.28630] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 10/30/2013] [Indexed: 12/20/2022]
Abstract
Skin cancers have a higher incidence than all other cancers combined and are a major cause of morbidity worldwide. Laboratory data suggest certain dietary constituents, notably omega-3 polyunsaturated fatty acids (n-3 PUFAs), could potentially protect against skin malignancy, although no large-scale review has been conducted in humans. The objective of this review and meta-analysis was to determine the relationship between dietary n-3 PUFAs and skin cancer incidence. It considered all published randomized controlled trials and observational studies up to March 2013. Five studies (two case-control and three cohort) were identified pertaining to oral n-3 PUFA consumption and incidence of basal cell carcinoma (BCC), squamous cell carcinoma (SCC), melanoma (or a combination) and were included in a random-effects meta-analysis. A further six studies considering nondietary n-3 PUFA exposure (e.g., by tissue analysis) and/or recognized biological markers of skin cancer risk (e.g., p53 expression) were analyzed qualitatively. Dietary n-3 PUFAs were not associated with BCC (pooled OR 1.05, 95% CIs 0.86-1.28). Consumption of high levels of n-3 PUFAs were inversely associated with melanoma, although with only one estimate available (OR 0.52, 95% CI 0.34-0.78), and SCC, although nonsignificantly (pooled OR 0.86, 95% CIs 0.59-1.23). Available evidence is suggestive, but currently inadequate, to support the hypothesis that n-3 PUFAs protect against skin malignancy.
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Affiliation(s)
- Sophie E Noel
- Albany Health Campus, Warden Avenue, Albany, WA, Australia
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21
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Pilkington SM, Rhodes LE, Al-Aasswad NMI, Massey KA, Nicolaou A. Impact of EPA ingestion on COX- and LOX-mediated eicosanoid synthesis in skin with and without a pro-inflammatory UVR challenge--report of a randomised controlled study in humans. Mol Nutr Food Res 2013; 58:580-90. [PMID: 24311515 PMCID: PMC4377077 DOI: 10.1002/mnfr.201300405] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/22/2013] [Accepted: 08/03/2013] [Indexed: 12/01/2022]
Abstract
Scope Eicosapentaenoic acid (EPA), abundant in oily fish, is reported to reduce skin inflammation and provide photoprotection, potential mechanisms include competition with arachidonic acid (AA) for metabolism by cyclooxygenases/lipoxygenases to less pro-inflammatory mediators. We thus examine impact of EPA intake on levels of AA, EPA and their resulting eicosanoids in human skin with or without ultraviolet radiation (UVR) challenge. Methods and results In a double-blind randomised controlled study, 79 females took 5 g EPA-rich or control lipid for 12 wk. Pre- and post-supplementation, red blood cell and skin polyunsaturated fatty acids were assessed by GC, and eicosanoids from unexposed and UVR-exposed skin by LC-MS/MS. Active supplementation increased red blood cell and dermal EPA versus control (both p < 0.001), lowering relative AA:EPA content (4:1 versus 15:1 and 5:1 versus 11:1, respectively; both p < 0.001). Pre-supplementation, UVR increased PGE2, 12-hydroxyeicosatetraenoic acids, 12-HEPE (all p < 0.001) and PGE3 (p < 0.05). Post-EPA, PGE2 was reduced in unchallenged skin (p < 0.05) while EPA-derived PGE3 (non-sign) and 12-HEPE (p < 0.01) were elevated post-UVR. Thus, post-EPA, PGE2:PGE3 was lower in unchallenged (12:1 versus 28:1; p < 0.05) and UVR exposed (12:1 versus 54:1; p < 0.01) skin; 12-hydroxyeicosatetraenoic acids:12-HEPE was lower in UVR-exposed skin (3:1 versus 11:1; p < 0.001). Conclusion Dietary EPA augments skin EPA:AA content, shifting eicosanoid synthesis towards less pro-inflammatory species, and promoting a regulatory milieu under basal conditions and in response to inflammatory insult.
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Affiliation(s)
- Suzanne M Pilkington
- Dermatology Centre, Institute of Inflammation and Repair, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Hospital, University of Manchester, Manchester, UK
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23
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Jenkins G, Wainwright LJ, Holland R, Barrett KE, Casey J. Wrinkle reduction in post-menopausal women consuming a novel oral supplement: a double-blind placebo-controlled randomized study. Int J Cosmet Sci 2013; 36:22-31. [PMID: 23927381 PMCID: PMC4265247 DOI: 10.1111/ics.12087] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 07/28/2013] [Indexed: 12/11/2022]
Abstract
Objective The maintenance of youthful skin appearance is strongly desired by a large proportion of the world's population. The aim of the present study was therefore to evaluate the effect on skin wrinkling, of a combination of ingredients reported to influence key factors involved in skin ageing, namely inflammation, collagen synthesis and oxidative/UV stress. A supplemented drink was developed containing soy isoflavones, lycopene, vitamin C and vitamin E and given to post-menopausal women with a capsule containing fish oil. Method We have performed a double-blind randomized controlled human clinical study to assess whether this cocktail of dietary ingredients can significantly improve the appearance of facial wrinkles. Results We have shown that this unique combination of micronutrients can significantly reduce the depth of facial wrinkles and that this improvement is associated with increased deposition of new collagen fibres in the dermis. Conclusion This study demonstrates that consumption of a mixture of soy isoflavones, lycopene, vitamin C, vitamin E and fish oil is able to induce a clinically measureable improvement in the depth of facial wrinkles following long-term use. We have also shown, for the first time with an oral product, that the improvement is associated with increased deposition of new collagen fibres in the dermis. Résumé
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Affiliation(s)
- G Jenkins
- Unilever R&D, Colworth Discover, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, U.K
| | - L J Wainwright
- Unilever R&D, Colworth Discover, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, U.K
| | - R Holland
- Unilever R&D, Colworth Discover, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, U.K
| | - K E Barrett
- Unilever R&D, Colworth Discover, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, U.K
| | - J Casey
- Unilever R&D, Colworth Discover, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, U.K
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Barcelos RCS, Segat HJ, Benvegnú DM, Trevizol F, Roversi K, Dolci GS, Dias VT, Piccolo J, Veit JC, Emanuelli T, Bürger ME. Trans Fat Supplementation Increases UV-Radiation-Induced Oxidative Damage on Skin of Mice. Lipids 2013; 48:977-87. [DOI: 10.1007/s11745-013-3802-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 05/17/2013] [Indexed: 10/26/2022]
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Glick NR, Fischer MH. The Role of Essential Fatty Acids in Human Health. J Evid Based Complementary Altern Med 2013. [DOI: 10.1177/2156587213488788] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Fatty acid research began about 90 years ago but intensified in recent years. Essential fatty acids (linoleic and α-linolenic) must come from diet. Other fatty acids may come from diet or may be synthesized. Fatty acids are major components of cell membrane structure, modulate gene transcription, function as cytokine precursors, and serve as energy sources in complex, interconnected systems. It is increasingly apparent that dietary fatty acids influence these vital functions and affect human health. While the strongest evidence for influence is found in cardiovascular disease and mental health, many additional conditions are affected. Problematic changes in the fatty acid composition of human diet have also taken place over the last century. This review summarizes current understanding of the pervasive roles of essential fatty acids and their metabolites in human health.
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Abstract
Photosensitivity disorders in childhood are rare, with the notable exception of overexposure as sunburn, and therefore require a more circumspect approach. Practitioners who treat children are key players in identifying and managing the many photosensitivity disorders that rarely present in childhood. A classic photodistribution of skin findings may suggest photosensitivity, but a correct diagnosis depends on a detailed history correlated with clinical findings.
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Affiliation(s)
- Omar Pacha
- Department of Dermatology, The University of Texas Medical School-Houston, 6655 Travis Street, Houston, TX 77030, USA
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Pilkington SM, Massey KA, Bennett SP, Al-Aasswad NM, Roshdy K, Gibbs NK, Friedmann PS, Nicolaou A, Rhodes LE. Randomized controlled trial of oral omega-3 PUFA in solar-simulated radiation-induced suppression of human cutaneous immune responses. Am J Clin Nutr 2013; 97:646-52. [PMID: 23364005 DOI: 10.3945/ajcn.112.049494] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Skin cancer is a major public health concern, and the majority of cases are caused by solar ultraviolet radiation (UVR) exposure, which suppresses skin immunity. Omega-3 (n-3) PUFAs protect against photoimmunosuppression and skin cancer in mice, but the impact in humans is unknown. OBJECTIVES We hypothesized that EPA-rich n-3 PUFA would abrogate photoimmunosuppression in humans. Therefore, a nutritional study was performed to assess the effect on UVR suppression of cutaneous cell-mediated immunity (CMI) reflected by nickel contact hypersensitivity (CHS). DESIGN In a double-blind, randomized controlled study, 79 volunteers (nickel-allergic women, 22-60 y old, with phototype I or II) took 5 g n-3 PUFA-containing lipid (70% EPA plus 10% DHA) or a control lipid daily for 3 mo. After supplementation, nickel was applied to 3 skin sites preexposed on 3 consecutive days to 1.9, 3.8, or 7.6 J/cm(2) of solar-simulated radiation (SSR) and to 3 unexposed control sites. Nickel CHS responses were quantified after 72 h and the percentage of immunosuppression by SSR was calculated. Erythrocyte [red blood cell (RBC)] EPA was measured by using gas chromatography. RESULTS SSR dose-related suppression of the nickel CHS response was observed in both groups. Photoimmunosuppression appeared less in the n-3 PUFA group than in the control group (not statistically significant [mean difference (95% CI): 6.9% (-2.1%, 15.9%)]). The difference was greatest at 3.8 J/cm(2) SSR [mean difference: 11% (95% CI: 0.5%, 21.4%)]. Postsupplementation RBC EPA was 4-fold higher in the n-3 PUFA group than in the control group (mean difference: 2.69% (95% CI: 2.23%, 3.14%), which confirmed the EPA bioavailability. CONCLUSION Oral n-3 PUFAs appear to abrogate photoimmunosuppression in human skin, providing additional support for their chemopreventive role; verification of study findings is required. This trial was registered at clinicaltrials.gov as NCT01032343.
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28
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Nicolaou A. Eicosanoids in skin inflammation. Prostaglandins Leukot Essent Fatty Acids 2013; 88:131-8. [PMID: 22521864 DOI: 10.1016/j.plefa.2012.03.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Revised: 03/29/2012] [Accepted: 03/30/2012] [Indexed: 12/27/2022]
Abstract
Eicosanoids play an integral part in homeostatic mechanisms related to skin health and structural integrity. They also mediate inflammatory events developed in response to environmental factors, such as exposure to ultraviolet radiation, and inflammatory and allergic disorders, including psoriasis and atopic dermatitis. This review article discusses biochemical aspects related to cutaneous eicosanoid metabolism, the contribution of these potent autacoids to skin inflammation and related conditions, and considers the importance of nutritional supplementation with bioactives such as omega-3 and omega-6 polyunsaturated fatty acids and plant-derived antioxidants as means of addressing skin health issues.
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Affiliation(s)
- Anna Nicolaou
- School of Pharmacy and Centre for Skin Sciences, School of Life Sciences, University of Bradford, Richmond Road, Bradford BD7 1DP, UK.
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Kendall AC, Nicolaou A. Bioactive lipid mediators in skin inflammation and immunity. Prog Lipid Res 2012; 52:141-64. [PMID: 23124022 DOI: 10.1016/j.plipres.2012.10.003] [Citation(s) in RCA: 149] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 10/15/2012] [Accepted: 10/17/2012] [Indexed: 12/20/2022]
Abstract
The skin is the primary barrier from the outside environment, protecting the host from injury, infectious pathogens, water loss and solar ultraviolet radiation. In this role, it is supported by a highly organized system comprising elements of innate and adaptive immunity, responsive to inflammatory stimuli. The cutaneous immune system is regulated by mediators such as cytokines and bioactive lipids that can initiate rapid immune responses with controlled inflammation, followed by efficient resolution. However, when immune responses are inadequate or mounted against non-infectious agents, these mediators contribute to skin pathologies involving unresolved or chronic inflammation. Skin is characterized by active lipid metabolism and fatty acids play crucial roles both in terms of structural integrity and functionality, in particular when transformed to bioactive mediators. Eicosanoids, endocannabinoids and sphingolipids are such key bioactive lipids, intimately involved in skin biology, inflammation and immunity. We discuss their origins, role and influence over various cells of the epidermis, dermis and cutaneous immune system and examine their function in examples of inflammatory skin conditions. We focus on psoriasis, atopic and contact dermatitis, acne vulgaris, wound healing and photodermatology that demonstrate dysregulation of bioactive lipid metabolism and examine ways of using this insight to inform novel therapeutics.
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Affiliation(s)
- Alexandra C Kendall
- School of Pharmacy and Centre for Skin Sciences, School of Life Sciences, University of Bradford, Richmond Road, Bradford BD7 1DP, UK
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Schagen SK, Zampeli VA, Makrantonaki E, Zouboulis CC. Discovering the link between nutrition and skin aging. DERMATO-ENDOCRINOLOGY 2012; 4:298-307. [PMID: 23467449 PMCID: PMC3583891 DOI: 10.4161/derm.22876] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Skin has been reported to reflect the general inner-health status and aging. Nutrition and its reflection on skin has always been an interesting topic for scientists and physicians throughout the centuries worldwide. Vitamins, carotenoids, tocopherols, flavonoids and a variety of plant extracts have been reported to possess potent anti-oxidant properties and have been widely used in the skin care industry either as topically applied agents or oral supplements in an attempt to prolong youthful skin appearance. This review will provide an overview of the current literature "linking" nutrition with skin aging.
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Affiliation(s)
- Silke K. Schagen
- Departments of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center; Dessau, Germany
| | - Vasiliki A. Zampeli
- Departments of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center; Dessau, Germany
- Laboratory for Biogerontology, Dermato-Pharmacology and Dermato-Endocrinology; Institute of Clinical Pharmacology and Toxicology; Charité Universitaetsmedizin Berlin; Berlin, Germany
| | - Evgenia Makrantonaki
- Departments of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center; Dessau, Germany
- Laboratory for Biogerontology, Dermato-Pharmacology and Dermato-Endocrinology; Institute of Clinical Pharmacology and Toxicology; Charité Universitaetsmedizin Berlin; Berlin, Germany
| | - Christos C. Zouboulis
- Departments of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center; Dessau, Germany
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Abstract
Omega 3 fatty acids can be obtained from several sources, and should be added to the daily diet to enjoy a good health and to prevent many diseases. Worldwide, general population use omega-3 fatty acid supplements and enriched foods to get and maintain adequate amounts of these fatty acids. The aim of this paper was to review main scientific evidence regarding the public health risks and benefits of the dietary sources of omega-3 fatty acids. A systematic literature search was performed, and one hundred and forty-five articles were included in the results for their methodological quality. The literature described benefits and risks of algal, fish oil, plant, enriched dairy products, animal-derived food, krill oil, and seal oil omega-3 fatty acids.
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Nicolaou A, Masoodi M, Gledhill K, Haylett AK, Thody AJ, Tobin DJ, Rhodes LE. The eicosanoid response to high dose UVR exposure of individuals prone and resistant to sunburn. Photochem Photobiol Sci 2011; 11:371-80. [PMID: 22173231 DOI: 10.1039/c1pp05272a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
High personal UVR doses can be gained during leisure activities, causing intense self-resolving inflammation (sunburn) of unprotected skin. UVR activates release of membrane fatty acids and upregulates their metabolism by cyclooxygenases (COX) and lipoxygenases (LOX) to different eicosanoids. While COX-derived prostaglandin (PG)E(2) is a potent mediator of sunburn vasodilatation, LOX-derived 15-hydroxyeicosatetraenoic acid (HETE) and its lipoxin metabolites may contribute to sunburn limitation. We explored the relationships between expression of these lipid mediators and the clinical and histological outcomes, comparing responses of individuals prone and more resistant to sunburn. An acute UVR exposure of 12 SED (standard erythema dose) was applied to buttock skin of 32 white Caucasians (n = 16 phototype I/II, n = 16 phototype III/IV), and over the subsequent 72 h assessments were made of skin erythema, immunohistochemical expression of leukocyte markers, COX-2, 12-LOX, 15-LOX and nitric oxide synthase (NOS), and eicosanoid levels by LC/ESI-MS/MS. Evidence of a significant inflammatory response was seen earlier in phototype I/II with regard to expression of erythema (4 h, p < 0.001), neutrophil infiltration (24 h, p = 0.01), epidermal COX-2 (24 h, p < 0.05) and 12-LOX (24 h, p < 0.01), and dermal eNOS (24 h, p < 0.05) proteins, although CD3+ lymphocyte infiltration showed an earlier increase in phototype III/IV (24 h, p < 0.05). Although erythema was equivalent at 72 h in both groups, phototype I/II showed higher PGE(2) accompanied by elevated 15-HETE, and a strong positive correlation was seen between these mediators (n = 18, r = 0.805, p = 0.0001). Hence anti-inflammatory eicosanoid 15-HETE may temper the pro-inflammatory milieu in sunburn, having greater influence in those prone to sunburn than those more resistant, given the same high UVR exposure conditions.
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Affiliation(s)
- Anna Nicolaou
- Bradford School of Pharmacy, School of Life Sciences, University of Bradford, Richmond Road, Bradford, UK BD7 1DP.
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Pilkington SM, Watson REB, Nicolaou A, Rhodes LE. Omega-3 polyunsaturated fatty acids: photoprotective macronutrients. Exp Dermatol 2011; 20:537-43. [PMID: 21569104 DOI: 10.1111/j.1600-0625.2011.01294.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Ultraviolet radiation (UVR) in sunlight has deleterious effects on skin, while behavioural changes have resulted in people gaining more sun exposure. The clinical impact includes a year-on-year increase in skin cancer incidence, and topical sunscreens alone provide an inadequate measure to combat overexposure to UVR. Novel methods of photoprotection are being targeted as additional measures, with growing interest in the potential for systemic photoprotection through naturally sourced nutrients. Omega-3 polyunsaturated fatty acids (n-3 PUFA) are promising candidates, showing potential to protect the skin from UVR injury through a range of mechanisms. In this review, we discuss the biological actions of n-3 PUFA in the context of skin protection from acute and chronic UVR overexposure and describe how emerging new technologies such as nutrigenomics and lipidomics assist our understanding of the contribution of such nutrients to skin health.
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Affiliation(s)
- Suzanne M Pilkington
- Dermatological Sciences, Inflammation Sciences Research Group, School of Translational Medicine, University of Manchester, Manchester Academic Health Science Centre, Salford Royal NHS Foundation Hospital, Manchester, UK
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Nicolaou A, Pilkington SM, Rhodes LE. Ultraviolet-radiation induced skin inflammation: dissecting the role of bioactive lipids. Chem Phys Lipids 2011; 164:535-43. [PMID: 21524643 DOI: 10.1016/j.chemphyslip.2011.04.005] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 04/08/2011] [Accepted: 04/10/2011] [Indexed: 11/16/2022]
Abstract
Acute exposure of human skin to the ultraviolet radiation (UVR) in sunlight results in the sunburn response. This is mediated in part by pro-inflammatory eicosanoids and other bioactive lipids, which are in turn produced via mechanisms including UVR-induction of oxidative stress, cell signalling and gene expression. Sunburn is a self-limiting inflammation offering a convenient and accessible system for the study of human cutaneous lipid metabolism. Recent lipidomic applications have revealed that a wider diversity of eicosanoids may be involved in the sunburn response than previously appreciated. This article reviews the effects of UVR on cutaneous lipids and examines the contribution of bioactive lipid mediators in the development of sunburn. Since human skin is an active site of polyunsaturated fatty acid (PUFA) metabolism, and these macronutrients can influence the production of eicosanoids/bioactive lipids, as well as modulate cell signalling, gene expression and oxidative stress, the application of PUFA as potential photoprotective agents is also considered.
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Affiliation(s)
- Anna Nicolaou
- School of Pharmacy and Centre for Skin Sciences, University of Bradford, Bradford, UK.
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Scientific Opinion on the substantiation of health claims related to eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), docosapentaenoic acid (DPA) and maintenance of normal cardiac function (ID 504, 506, 516, 527, 538, 703, 1128, 1317, 1324, 1325),. EFSA J 2010. [DOI: 10.2903/j.efsa.2010.1796] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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Shibata A, Nakagawa K, Kawakami Y, Tsuzuki T, Miyazawa T. Suppression of gamma-tocotrienol on UVB induced inflammation in HaCaT keratinocytes and HR-1 hairless mice via inflammatory mediators multiple signaling. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:7013-7020. [PMID: 20465215 DOI: 10.1021/jf100691g] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Tocopherol (Toc) such as alpha-Toc has been expected to act as photochemopreventive agent of skin, but the effect of the other vitamin E forms [tocotrienols (T3)] has not been fully understood. We evaluated the anti-inflammatory effect of T3 on UVB-induced inflammatory reaction using immortalized human keratinocytes and hairless mice. gamma-T3 suppressed UVB-induced PGE(2) production while similar alpha-Toc doses had no effect. The anti-inflammatory actions of gamma-T3 were explained by its ability to reduce UVB-induced inflammatory gene and protein expression [cyclooxgenase-2 (COX-2), interleukin (IL)-1beta, IL-6, and monocyte chemotactic protein-1]. Western blot analysis revealed gamma-T3 inhibited p38, extracellular signal-regulated kinase, and c-Jun N-terminal kinase/stress-activated protein kinase activation. In HR-1 hairless mice, oral T3 suppressed UVB-induced changes in skin thickness, COX-2 protein expression, and hyperplasia, but alpha-Toc did not. These results suggest T3 has potential use to protect against UVB-induced skin inflammation.
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Affiliation(s)
- Akira Shibata
- Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan
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Yüregir H. Food for the skin. NUTR BULL 2009. [DOI: 10.1111/j.1467-3010.2009.01778.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Piccardi N, Manissier P. Nutrition and nutritional supplementation: Impact on skin health and beauty. DERMATO-ENDOCRINOLOGY 2009; 1:271-4. [PMID: 20808515 PMCID: PMC2836433 DOI: 10.4161/derm.1.5.9706] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Accepted: 07/30/2009] [Indexed: 11/19/2022]
Abstract
Skin acts as a natural barrier between internal and external environments thus plays an important role in vital biological functions such as protection against mechanical/chemical damages, micro-organisms, ultraviolet damage. Nutrition has a critical impact on strengthening skin's capabilities to fight against these multiple aggressions.Nutritional deficiencies are often associated with skin health disorders, while diets can either positively or negatively influence skin condition. More recently, the concept of nutritional supplementation has emerged as a new strategy in the daily practice of dermatology as well as a complementary approach to topical cosmetics in the field of beauty. Focusing on human clinical data, this paper proposes to illustrate the link between skin health and nutrition and to exemplify the beneficial actions of nutritional supplementation in skin health and beauty.
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Segger D, Matthies A, Saldeen T. Supplementation with Eskimo®Skin Care improves skin elasticity in women. A pilot study. J DERMATOL TREAT 2009; 19:279-83. [DOI: 10.1080/09546630801958238] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wolf P, Byrne SN, Gruber-Wackernagel A. New insights into the mechanisms of polymorphic light eruption: resistance to ultraviolet radiation-induced immune suppression as an aetiological factor. Exp Dermatol 2009; 18:350- 6. [PMID: 19348001 DOI: 10.1111/j.1600-0625.2009.00859.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An abnormal immune response has long been thought responsible for the patho-aetiology of polymorphic light eruption, the most common photodermatosis. Recent evidence indicates that polymorphic light eruption patients are resistant to the immune suppressive effects of sunlight, a phenomenon that leads to the formation of skin lesions upon seasonal sun exposure. This immunological abnormality in polymorphic light eruption supports the concept of the biological significance and evolutionary logic of sunlight-induced immune suppression, i.e. the prevention of immune responses to photo-induced neo-antigens in the skin, thereby preventing autoimmunity and skin rashes. This article focuses on the immunological alterations in polymorphic light eruption and the pathogenic significance to the disease state and skin carcinogenesis.
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Affiliation(s)
- Peter Wolf
- Research Unit for Photodermatology, Department of Dermatology, Medical University of Graz, Graz, Austria.
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Rhodes LE, Gledhill K, Masoodi M, Haylett AK, Brownrigg M, Thody AJ, Tobin DJ, Nicolaou A. The sunburn response in human skin is characterized by sequential eicosanoid profiles that may mediate its early and late phases. FASEB J 2009; 23:3947-56. [PMID: 19584301 PMCID: PMC2791058 DOI: 10.1096/fj.09-136077] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Sunburn is a commonly occurring acute inflammatory process, with dermal vasodilatation and leukocyte infiltration as central features. Ultraviolet (UV) B-induced hydrolysis of membrane phospholipids releases polyunsaturated fatty acids, and their subsequent metabolism by cyclooxygenases (COXs) and lipoxygenases (LOXs) may produce potent eicosanoid mediators modulating different stages of the inflammation. Our objective was to identify candidate eicosanoids formed during the sunburn reaction in relation to its clinical and histological course. We exposed skin of healthy humans (n=32) to UVB and, for 72 h, examined expression of proinflammatory and anti-inflammatory eicosanoids using LC/ESI-MS/MS, and examined immunohistochemical expression of COX-2, 12-LOX, 15-LOX, and leukocyte markers, while quantifying clinical erythema. We show that vasodilatory prostaglandins (PGs) PGE2, PGF2α, and PGE3 accompany the erythema in the first 24–48 h, associated with increased COX-2 expression at 24 h. Novel, potent leukocyte chemoattractants 11-, 12-, and 8-monohydroxy-eicosatetraenoic acid (HETE) are elevated from 4 to 72 h, in association with peak dermal neutrophil influx at 24 h, and increased dermal CD3+ lymphocytes and 12- and 15-LOX expression from 24 to 72 h. Anti-inflammatory metabolite 15-HETE shows later expression, peaking at 72 h. Sunburn is characterized by overlapping sequential profiles of increases in COX products followed by LOX products that may regulate subsequent events and ultimately its resolution.—Rhodes, L. E., Gledhill, K., Masoodi, M., Haylett, A. K., Brownrigg, M., Thody, A. J., Tobin, D. J., Nicolaou, A. The sunburn response in human skin is characterized by sequential eicosanoid profiles that may mediate its early and late phases.
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Affiliation(s)
- Lesley E Rhodes
- Photobiology Unit, Dermatological Sciences, University of Manchester, Salford Royal NHS Foundation Hospital, Manchester, M6 8HD, UK.
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Moison RMW, Steenvoorden DPT, Beijersbergen van Henegouwen GMJ. Topically Applied Eicosapentaenoic Acid Protects Against Local Immunosuppression Induced by UVB Irradiation, cis-Urocanic Acid and Thymidine Dinucleotides¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2001)0730064taeapa2.0.co2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Takemura N, Takahashi K, Tanaka H, Ihara Y, Ikemoto A, Fujii Y, Okuyama H. Dietary, but not Topical, Alpha-linolenic Acid Suppresses UVB-induced Skin Injury in Hairless Mice when Compared with Linoleic Acid¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2002)0760657dbntal2.0.co2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shahbakhti H, Watson REB, Azurdia RM, Ferreira CZ, Garmyn M, Rhodes LE. Influence of Eicosapentaenoic Acid, an Omega-3 Fatty Acid, on Ultraviolet-B Generation of Prostaglandin-E2 and Proinflammatory Cytokines Interleukin-1β, Tumor Necrosis Factor-α, Interleukin-6 and Interleukin-8 in Human Skin In Vivo¶. Photochem Photobiol 2007. [DOI: 10.1111/j.1751-1097.2004.tb00076.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Rakel D, Rindfleisch JA. The Anti-Inflammatory Diet. Integr Med (Encinitas) 2007. [DOI: 10.1016/b978-1-4160-2954-0.50092-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kabashima K, Nagamachi M, Honda T, Nishigori C, Miyachi Y, Tokura Y, Narumiya S. Prostaglandin E2 is required for ultraviolet B-induced skin inflammation via EP2 and EP4 receptors. J Transl Med 2007; 87:49-55. [PMID: 17075575 DOI: 10.1038/labinvest.3700491] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Keratinocytes are the major target of sunlight, and they produce prostaglandin (PG) E(2) upon ultraviolet (UV) exposure. Although indomethacin, one of cyclooxygenase inhibitors, is known to suppress UV-induced acute skin inflammation, it remains uncertain whether endogenous PGE(2) is responsible for UV-induced skin inflammation, and which subtype of PGE(2) receptors mediates this process. UV-induced skin inflammation was investigated by using genetically and pharmacologically PGE(2) receptor-deficient mice. We applied UV-induced skin inflammation model to genetical and pharmacological PGE(2) receptor-deficient mice. We exposed UVB on these mice at 5 kJ/m(2), and examined the ear swelling and the histological findings. We also measured the blood flow using a laser doppler device to assess the intensity of UVB-induced inflammatory change. The UV-induced ear swelling at 48 h after exposure was significantly reduced in EP2(-/-), EP4(-/-) or wild-type mice treated with the EP4 antagonist compared to control mice. Consistently, inflammatory cell infiltration into the local skin, and local blood flow after UV exposure were significantly reduced by EP2 or EP4 signaling blockade. These data suggest that PGE(2)-EP2/EP4 signaling is mandatory in UV-induced acute skin inflammation, presumably by enhancing blood flow in the microenvironment.
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Affiliation(s)
- Kenji Kabashima
- Department of Pharmacology, Kyoto University Graduate School of Medicine, Sakyo, Kyoto, Japan.
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