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Jo CS, Myung CH, Yoon YC, Ahn BH, Min JW, Seo WS, Lee DH, Kang HC, Heo YH, Choi H, Hong IK, Hwang JS. The Effect of Lactobacillus plantarum Extracellular Vesicles from Korean Women in Their 20s on Skin Aging. Curr Issues Mol Biol 2022; 44:526-540. [PMID: 35723322 PMCID: PMC8928950 DOI: 10.3390/cimb44020036] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 12/20/2022] Open
Abstract
Extracellular vesicles, which are highly conserved in most cells, contain biologically active substances. The vesicles and substances interact with cells and impact physiological mechanisms. The skin is the most external organ and is in direct contact with the external environment. Photoaging and skin damage are caused by extrinsic factors. The formation of wrinkles is a major indicator of skin aging and is caused by a decrease in collagen and hyaluronic acid. MMP-1 expression is also increased. Due to accruing damage, skin aging reduces the ability of the skin barrier, thereby lowering the skin's ability to contain water and increasing the amount of water loss. L. plantarum suppresses various harmful bacteria by secreting an antimicrobial substance. L. plantarum is also found in the skin, and research on the interactions between the bacteria and the skin is in progress. Although several studies have investigated L. plantarum, there are only a limited number of studies on extracellular vesicles (EV) derived from L. plantarum, especially in relation to skin aging. Herein, we isolated EVs that were secreted from L. plantarum of women in their 20s (LpEVs). We then investigated the effect of LpEVs on skin aging in CCD986sk. We showed that LpEVs modulated the mRNA expression of ECM related genes in vitro. Furthermore, LpEVs suppressed wrinkle formation and pigmentation in clinical trials. These results demonstrated that LpEVs have a great effect on skin aging by regulating ECM related genes. In addition, our study offers important evidence on the depigmentation effect of LpEVs.
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Affiliation(s)
- Chan Song Jo
- Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Gyeonggi-do, Korea; (C.S.J.); (C.H.M.)
| | - Cheol Hwan Myung
- Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Gyeonggi-do, Korea; (C.S.J.); (C.H.M.)
| | - Yeo Cho Yoon
- Human & Microbiome Communicating Laboratory, GFC Co., Ltd., Hwasung 18471, Gyeonggi-do, Korea; (Y.C.Y.); (B.H.A.); (W.S.S.); (H.C.K.)
| | - Beom Hee Ahn
- Human & Microbiome Communicating Laboratory, GFC Co., Ltd., Hwasung 18471, Gyeonggi-do, Korea; (Y.C.Y.); (B.H.A.); (W.S.S.); (H.C.K.)
| | - Jin Woo Min
- Green & Biome Customizing Laboratory, GFC Co., Ltd., Hwasung 18471, Gyeonggi-do, Korea;
| | - Won Sang Seo
- Human & Microbiome Communicating Laboratory, GFC Co., Ltd., Hwasung 18471, Gyeonggi-do, Korea; (Y.C.Y.); (B.H.A.); (W.S.S.); (H.C.K.)
- Green & Biome Customizing Laboratory, GFC Co., Ltd., Hwasung 18471, Gyeonggi-do, Korea;
| | - Dong Hwan Lee
- Clinical Business Division, Korea Dermatology Research Institute, GFC Co., Ltd., Sungnam 13517, Gyeonggi-do, Korea;
| | - Hee Cheol Kang
- Human & Microbiome Communicating Laboratory, GFC Co., Ltd., Hwasung 18471, Gyeonggi-do, Korea; (Y.C.Y.); (B.H.A.); (W.S.S.); (H.C.K.)
- Green & Biome Customizing Laboratory, GFC Co., Ltd., Hwasung 18471, Gyeonggi-do, Korea;
| | - Yun Hoe Heo
- R&D Complex, HK Kolmar Co., Ltd., Seoul 30004, Korea; (Y.H.H.); (H.C.); (I.K.H.)
| | - Hyeong Choi
- R&D Complex, HK Kolmar Co., Ltd., Seoul 30004, Korea; (Y.H.H.); (H.C.); (I.K.H.)
| | - In Ki Hong
- R&D Complex, HK Kolmar Co., Ltd., Seoul 30004, Korea; (Y.H.H.); (H.C.); (I.K.H.)
| | - Jae Sung Hwang
- Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Gyeonggi-do, Korea; (C.S.J.); (C.H.M.)
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Beylot C. Vieillissement cutané – Vieillissement facial global : orientation thérapeutique. Ann Dermatol Venereol 2019; 146:41-74. [DOI: 10.1016/j.annder.2018.10.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Melanin and lipofuscin as hallmarks of skin aging. Postepy Dermatol Alergol 2017; 34:97-103. [PMID: 28507486 PMCID: PMC5420599 DOI: 10.5114/ada.2017.67070] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 06/27/2016] [Indexed: 11/24/2022] Open
Abstract
Discoloration are symptoms of skin aging. They are connected with presence of melanin and lipofuscin, whose excess and abnormal distribution in the skin cause dark spots to appear. Melanin is formed under the influence of tyrosinase during melanogenesis. Its content changes with age, which may be a result of menopause. Lipofuscin is another example of the age pigment. It is composed of proteins, lipids and carbohydrates. It is described as an age pigment because its content increases with age. The formation and accumulation of lipofuscin is inevitable and leads to cell and homeostasis dysfunction because it reduces the proteasome activity.
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Berardinelli F, Coluzzi E, Sgura A, Antoccia A. Targeting telomerase and telomeres to enhance ionizing radiation effects in in vitro and in vivo cancer models. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2017; 773:204-219. [PMID: 28927529 DOI: 10.1016/j.mrrev.2017.02.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 01/05/2023]
Abstract
One of the hallmarks of cancer consists in the ability of tumor cells to divide indefinitely, and to maintain stable telomere lengths throughout the activation of specific telomere maintenance mechanisms (TMM). Therefore in the last fifteen years, researchers proposed to target telomerase or telomeric structure in order to block limitless replicative potential of cancer cells providing a fascinating strategy for a broad-spectrum cancer therapy. In the present review, we report in vitro and in vivo evidence regarding the use of chemical agents targeting both telomerase or telomere structure and showing promising antitumor effects when used in combination with ionizing radiation (IR). RNA interference, antisense oligonucleotides (e.g., GRN163L), non-nucleoside inhibitors (e.g., BIBR1532) and nucleoside analogs (e.g., AZT) represent some of the most potent strategies to inhibit telomerase activity used in combination with IR. Furthermore, radiosensitizing effects were demonstrated also for agents acting directly on the telomeric structure such as G4-ligands (e.g., RHPS4 and Telomestatin) or telomeric-oligos (T-oligos). To date, some of these compounds are under clinical evaluation (e.g., GRN163L and KML001). Advantages of Telomere/Telomerase Targeting Compounds (T/TTCs) coupled with radiotherapy may be relevant in the treatment of radioresistant tumors and in the development of new optimized treatment plans with reduced dose adsorbed by patients and consequent attenuation of short- end long-term side effects. Pros and cons of possible future applications in cancer therapy based on the combination of T/TCCs and radiation treatment are discussed.
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Affiliation(s)
- F Berardinelli
- Dipartimento di Scienze, Università Roma Tre, Rome Italy; Istituto Nazionale di Fisica Nucleare, INFN, Sezione di Roma Tre, Rome, Italy.
| | - E Coluzzi
- Dipartimento di Scienze, Università Roma Tre, Rome Italy
| | - A Sgura
- Dipartimento di Scienze, Università Roma Tre, Rome Italy; Istituto Nazionale di Fisica Nucleare, INFN, Sezione di Roma Tre, Rome, Italy
| | - A Antoccia
- Dipartimento di Scienze, Università Roma Tre, Rome Italy; Istituto Nazionale di Fisica Nucleare, INFN, Sezione di Roma Tre, Rome, Italy
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Min W, Liu X, Qian Q, Lin B, Wu D, Wang M, Ahmad I, Yusuf N, Luo D. Effects of baicalin against UVA-induced photoaging in skin fibroblasts. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2014; 42:709-27. [PMID: 24871661 DOI: 10.1142/s0192415x14500463] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Ultraviolet A (UVA) radiation contributes to skin photoaging. Baicalin, a plant-derived flavonoid, effectively absorbs UV rays and has been shown to have anti-oxidant and anti-inflammatory properties that may delay the photoaging process. In the current study, cultured human skin fibroblasts were incubated with 50 μg/ml baicalin 24 hours prior to 10 J/cm(2) UVA irradiation. In order to examine the efficacy of baicalin treatment in delaying UVA-induced photoaging, we investigated aging-related markers, cell cycle changes, anti-oxidant activity, telomere length, and DNA damage markers. UVA radiation caused an increased proportion of β-Gal positive cells and reduced telomere length in human skin fibroblasts. In addition, UVA radiation inhibited TGF-β1 secretion, induced G1 phase arrest, reduced SOD and GSH-Px levels, increased MDA levels, enhanced the expression of MMP-1, TIMP-1, p66, p53, and p16 mRNA, reduced c-myc mRNA expression, elevated p53 and p16 protein expression, and reduced c-myc protein expression. Baicalin treatment effectively protected human fibroblasts from these UVA radiation-induced aging responses, suggesting that the underlying mechanism involves the inhibition of oxidative damage and regulation of the expression of senescence-related genes, including those encoding for p53, p66(Shc) and p16.
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Affiliation(s)
- Wei Min
- Department of Dermatology, The First Affiliated Hospital of Soochow University, Suzhou, China , Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Abstract
PURPOSE OF REVIEW Cosmeceuticals are substances that exert physiologic changes to the skin for aesthetic purposes and are popular alternatives to invasive cosmetic procedures for antiaging. Cosmeceuticals are being used on children; yet studies of cosmeceuticals in the pediatric population are limited. RECENT FINDINGS Cosmeceuticals remain an unrecognized category by the US Food and Drug Administration, and therefore stringent regulatory pathways do not exist to guide research and marketing. To date, no safety and efficacy study exists on cosmeceutical use in pediatric patients. Increasing knowledge of the mechanisms underlying intrinsic and extrinsic skin aging, including reactive oxygen species formation, effects of declining hormones, and ultraviolet radiation, forms the scientific basis for common cosmeceuticals such as retinoids, botanicals such as soy isoflavones, and even moisturizers and sunscreen. Virtually all studies on cosmeceuticals have been performed in women with varying degrees of skin aging. The cosmeceuticals most likely to be used by younger children are moisturizers and sunscreens. As the popularity and availability of other antiaging cosmeceuticals grow, practitioners will encounter more and more beauty-conscious teenagers using these products for preventive rather than restorative purposes. SUMMARY Pediatricians should be familiar with the use of common cosmeceuticals used in children, especially the use of broad-spectrum sunscreen. In the future, more children will be exposed to cosmeceuticals and may experience side effects such as contact dermatitis and skin irritation.
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Xu Q, Hou W, Zheng Y, Liu C, Gong Z, Lu C, Lai W, Maibach HI. Ultraviolet A-induced cathepsin K expression is mediated via MAPK/AP-1 pathway in human dermal fibroblasts. PLoS One 2014; 9:e102732. [PMID: 25048708 PMCID: PMC4105408 DOI: 10.1371/journal.pone.0102732] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 06/20/2014] [Indexed: 12/21/2022] Open
Abstract
Background Cathepsin K (CatK), a cysteine protease with the potent elastolytic activity, plays a predominant role in intracellular elastin degradation in human dermal fibroblasts (HDFs), and contributes to solar elastosis. In previous studies, CatK expression was downregulated in photoaged skin and fibroblasts, but upregulated in acute UVA-irradiated skin and fibroblasts. The underlying mechanisms regulating UVA-induced CatK expression remain elusive. Objective This study investigates mechanisms involved in the regulation of UVA-induced CatK expression in HDFs. Methods Primary HDFs were exposed to UVA. Cell proliferation was analyzed using a colorimetric assay of relative cell number. Quantitative real-time RT-PCR and Western blot were performed to detect CatK expression in HDFs on three consecutive days after 10 J/cm2 UVA irradiation, or cells treated with increasing UVA doses. UVA-activated MAPK/AP-1 pathway was examined by Western blot. Effects of inhibition of MAPK pathway and knockdown of Jun and Fos on UVA-induced CatK expression were also measured by real-time RT-PCR and Western blot. Results UVA significantly increased CatK mRNA and protein expression in a dose-dependent manner. UVA-induced CatK expression occurred along with UVA-activated phosphorylation of JNK, p38 and Jun, UVA-increased expression of Fos. Inactivation of JNK and p38MAPK pathways both remarkably decreased UVA-induced CatK expression, which was suppressed more by inhibition of JNK pathway. Furthermore, knockdown of Jun and Fos significantly attenuated basal and UVA-induced CatK expression. Conclusion UVA is capable of increasing CatK expression in HDFs, most likely by activation of MAPK pathway and of AP-1, which has been shown to be the case for matrix metalloproteinases. As current strategies for selecting anti-photoaging agents focus on their ability to decrease MMPs' expression through inhibiting UV- activated MAPK pathway, future strategies should also consider their effect on CatK expression.
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Affiliation(s)
- Qingfang Xu
- Department of Dermato-Venereology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Wei Hou
- Department of Dermato-Venereology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
- Department of Dermato-Venereology, the First Teaching hospital of Xinjiang Medical University, Urumqi, PR China
| | - Yue Zheng
- Department of Dermato-Venereology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Chen Liu
- Department of Dermato-Venereology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Zijian Gong
- Department of Dermato-Venereology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Chun Lu
- Department of Dermato-Venereology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Wei Lai
- Department of Dermato-Venereology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
- * E-mail:
| | - Howard I. Maibach
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, California, United States of America
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Tigges J, Krutmann J, Fritsche E, Haendeler J, Schaal H, Fischer JW, Kalfalah F, Reinke H, Reifenberger G, Stühler K, Ventura N, Gundermann S, Boukamp P, Boege F. The hallmarks of fibroblast ageing. Mech Ageing Dev 2014; 138:26-44. [PMID: 24686308 DOI: 10.1016/j.mad.2014.03.004] [Citation(s) in RCA: 159] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Revised: 03/11/2014] [Accepted: 03/18/2014] [Indexed: 12/26/2022]
Abstract
Ageing is influenced by the intrinsic disposition delineating what is maximally possible and extrinsic factors determining how that frame is individually exploited. Intrinsic and extrinsic ageing processes act on the dermis, a post-mitotic skin compartment mainly consisting of extracellular matrix and fibroblasts. Dermal fibroblasts are long-lived cells constantly undergoing damage accumulation and (mal-)adaptation, thus constituting a powerful indicator system for human ageing. Here, we use the systematic of ubiquitous hallmarks of ageing (Lopez-Otin et al., 2013, Cell 153) to categorise the available knowledge regarding dermal fibroblast ageing. We discriminate processes inducible in culture from phenomena apparent in skin biopsies or primary cells from old donors, coming to the following conclusions: (i) Fibroblasts aged in culture exhibit most of the established, ubiquitous hallmarks of ageing. (ii) Not all of these hallmarks have been detected or investigated in fibroblasts aged in situ (in the skin). (iii) Dermal fibroblasts aged in vitro and in vivo exhibit additional features currently not considered ubiquitous hallmarks of ageing. (iv) The ageing process of dermal fibroblasts in their physiological tissue environment has only been partially elucidated, although these cells have been a preferred model of cell ageing in vitro for decades.
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Affiliation(s)
- Julia Tigges
- Leibniz Research Institute for Environmental Medicine (IUF), Düsseldorf, Germany
| | - Jean Krutmann
- Leibniz Research Institute for Environmental Medicine (IUF), Düsseldorf, Germany
| | - Ellen Fritsche
- Leibniz Research Institute for Environmental Medicine (IUF), Düsseldorf, Germany
| | - Judith Haendeler
- Leibniz Research Institute for Environmental Medicine (IUF), Düsseldorf, Germany; Institute of Clinical Chemistry and Laboratory Diagnostics, Heinrich-Heine-University, Med. Faculty, Düsseldorf, Germany
| | - Heiner Schaal
- Center for Microbiology and Virology, Institute of Virology, Heinrich-Heine-University, Med. Faculty, D-40225 Düsseldorf, Germany
| | - Jens W Fischer
- Institute for Pharmacology and Clinical Pharmacology, Heinrich-Heine-University, Med. Faculty, Düsseldorf, Germany
| | - Faiza Kalfalah
- Institute of Clinical Chemistry and Laboratory Diagnostics, Heinrich-Heine-University, Med. Faculty, Düsseldorf, Germany
| | - Hans Reinke
- Leibniz Research Institute for Environmental Medicine (IUF), Düsseldorf, Germany; Institute of Clinical Chemistry and Laboratory Diagnostics, Heinrich-Heine-University, Med. Faculty, Düsseldorf, Germany
| | - Guido Reifenberger
- Department of Neuropathology, Heinrich-Heine-University, Med. Faculty, Düsseldorf, Germany
| | - Kai Stühler
- Institute for Molecular Medicine, Heinrich-Heine-University, Med. Faculty, Düsseldorf, Germany; Molecular Proteomics Laboratory, Centre for Biological and Medical Research (BMFZ), Heinrich-Heine-University, Düsseldorf, Germany
| | - Natascia Ventura
- Leibniz Research Institute for Environmental Medicine (IUF), Düsseldorf, Germany; Institute of Clinical Chemistry and Laboratory Diagnostics, Heinrich-Heine-University, Med. Faculty, Düsseldorf, Germany
| | | | - Petra Boukamp
- German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Fritz Boege
- Institute of Clinical Chemistry and Laboratory Diagnostics, Heinrich-Heine-University, Med. Faculty, Düsseldorf, Germany.
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UV signaling pathways within the skin. J Invest Dermatol 2014; 134:2080-2085. [PMID: 24759085 PMCID: PMC4102648 DOI: 10.1038/jid.2014.161] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 02/25/2014] [Accepted: 03/12/2014] [Indexed: 11/08/2022]
Abstract
The effects of UVR on the skin include tanning, carcinogenesis, immunomodulation, and synthesis of vitamin D, among others. Melanocortin 1 receptor polymorphisms correlate with skin pigmentation, UV sensitivity, and skin cancer risk. This article reviews pathways through which UVR induces cutaneous stress and the pigmentation response. Modulators of the UV tanning pathway include sunscreen agents, MC1R activators, adenylate cyclase activators, phosphodiesterase 4D3 inhibitors, T oligos, and MITF regulators such as histone deacetylase (HDAC)-inhibitors. UVR, as one of the most ubiquitous carcinogens, represents both a challenge and enormous opportunity in skin cancer prevention.
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Bernard JJ, Cowing-Zitron C, Nakatsuji T, Muehleisen B, Muto J, Borkowski AW, Martinez L, Greidinger EL, Yu BD, Gallo RL. Ultraviolet radiation damages self noncoding RNA and is detected by TLR3. Nat Med 2012; 18:1286-90. [PMID: 22772463 DOI: 10.1038/nm.2861] [Citation(s) in RCA: 293] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 06/11/2012] [Indexed: 01/26/2023]
Abstract
Exposure to ultraviolet B (UVB) radiation from the sun can result in sunburn, premature aging and carcinogenesis, but the mechanism responsible for acute inflammation of the skin is not well understood. Here we show that RNA is released from keratinocytes after UVB exposure and that this stimulates production of the inflammatory cytokines tumor necrosis factor α (TNF-α) and interleukin-6 (IL-6) from nonirradiated keratinocytes and peripheral blood mononuclear cells (PBMCs). Whole-transcriptome sequencing revealed that UVB irradiation of keratinocytes induced alterations in the double-stranded domains of some noncoding RNAs. We found that this UVB-damaged RNA was sufficient to induce cytokine production from nonirradiated cells, as UVB irradiation of a purified noncoding RNA (U1 RNA) reproduced the same response as the one we observed to UVB-damaged keratinocytes. The responses to both UVB-damaged self-RNAs and UVB-damaged keratinocytes were dependent on Toll-like receptor 3 (TLR3) and Toll-like receptor adaptor molecule 1 (TRIF). In response to UVB exposure, Tlr3(-/-) mice did not upregulate TNF-α in the skin. Moreover, TLR3 was also necessary for UVB-radiation-induced immune suppression. These findings establish that UVB damage is detected by TLR3 and that self-RNA is a damage-associated molecular pattern that serves as an endogenous signal of solar injury.
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Affiliation(s)
- Jamie J Bernard
- Division of Dermatology, University of California, San Diego, San Diego, California, USA; Susan Lehman Cullman Laboratory for Cancer Research, Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA
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Affiliation(s)
- Barbara A Gilchrest
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA.
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Mogensen M, Jemec GB. The potential carcinogenic risk of tanning beds: clinical guidelines and patient safety advice. Cancer Manag Res 2010; 2:277-82. [PMID: 21188119 PMCID: PMC3004589 DOI: 10.2147/cmr.s7403] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION In 2009, the WHO listed ultraviolet (UV) radiation as a group 1 carcinogen. In spite of this, each year, millions of people tan indoor in Western countries. The aim of this review is to summarize evidence of tanning bed carcinogenesis and to present guidelines for use of tanning beds and patient safety advice. METHODS A narrative review of the literature was conducted based on both PubMed and Medline searches and on literature review of the retrieved papers. RESULTS Use of indoor tanning beds represents a significant and avoidable risk factor for the development of both melanoma and nonmelanoma skin cancers. Frequent tanners are more often adolescent females. Tanning beds have additional potential adverse effects such as burns, solar skin damage, infection, and possibly also addictive behavior. DISCUSSION The effort in preventing UV light-induced carcinogenesis should currently be aimed at developing new strategies for public health information. Tanning beds are one preventable source of UV radiation. In the majority of people solar UV radiation continues to be the major factor and therefore anti-tanning campaigns must always include sunbathers.
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Affiliation(s)
- Mette Mogensen
- Department of Dermatology, Gentofte Hospital, Hellerup, Denmark
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Abstract
Like the entire human organism, the skin is subject to an intrinsic unpreventable aging process. But exogenous factors also influence skin aging. Ultraviolet radiation in particular results in premature skin aging, also referred to as extrinsic skin aging or photo aging, causing in large part aging-associated changes in sun-exposed areas. Intrinsic and extrinsic aging share several molecular similarities despite morphological and pathophysiological differences. The formation of reactive oxygen species and the induction of metalloproteinases reflect central aspects of skin aging. Accumulation of fragmented collagen fibrils prevents neocollagenesis and accounts for further degradation of extracellular matrix by means of positive feedback regulation. The importance of extrinsic factors in skin aging and the detection of its mechanisms has given rise to development of various therapeutic and preventive strategies.
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Affiliation(s)
- E Kohl
- Klinik und Poliklinik für Dermatologie, Universitätsklinikum Regensburg, 93053 Regensburg.
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