1
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Korhonen E. Inflammasome activation in response to aberrations of cellular homeostasis in epithelial cells from human cornea and retina. Acta Ophthalmol 2024; 102 Suppl 281:3-68. [PMID: 38386419 DOI: 10.1111/aos.16646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 01/16/2024] [Indexed: 02/24/2024]
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2
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Daré RG, Kolanthai E, Neal CJ, Fu Y, Seal S, Nakamura CV, Lautenschlager SOS. Cerium Oxide Nanoparticles Conjugated with Tannic Acid Prevent UVB-Induced Oxidative Stress in Fibroblasts: Evidence of a Promising Anti-Photodamage Agent. Antioxidants (Basel) 2023; 12:antiox12010190. [PMID: 36671052 PMCID: PMC9855054 DOI: 10.3390/antiox12010190] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Exposure to ultraviolet radiation induces photodamage towards cellular macromolecules that can progress to photoaging and photocarcinogenesis. The topical administration of compounds that maintain the redox balance in cells presents an alternative approach to combat skin oxidative damage. Cerium oxide nanoparticles (CNPs) can act as antioxidants due to their enzyme-like activity. In addition, a recent study from our group has demonstrated the photoprotective potential of tannic acid (TA). Therefore, this work aimed to synthesize CNPs associated with TA (CNP-TA) and investigate its photoprotective activity in L929 fibroblasts exposed to UVB radiation. CNP conjugation with TA was confirmed by UV-Vis spectra and X-ray photoelectron spectroscopy. Bare CNPs and CNP-TA exhibited particle sizes of ~5 and ~10 nm, superoxide dismutase activity of 3724 and 2021 unit/mg, and a zeta potential of 23 and -19 mV, respectively. CNP-TA showed lower cytotoxicity than free TA and the capacity to reduce the oxidative stress caused by UVB; supported by the scavenging of reactive oxygen species, the prevention of endogenous antioxidant system depletion, and the reduction in oxidative damage in lipids and DNA. Additionally, CNP-TA improved cell proliferation and decreased TGF-β, metalloproteinase-1, and cyclooxygenase-2. Based on these results, CNP-TA shows therapeutic potential for protection against photodamage, decreasing molecular markers of photoaging and UVB-induced inflammation.
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Affiliation(s)
- Regina G. Daré
- Post-Graduate Program in Pharmaceutical Sciences, State University of Maringá (UEM), Maringá 87020900, Paraná, Brazil
- Correspondence:
| | - Elayaraja Kolanthai
- Advanced Materials Processing and Analysis Center, Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Craig J. Neal
- Advanced Materials Processing and Analysis Center, Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Yifei Fu
- Advanced Materials Processing and Analysis Center, Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Sudipta Seal
- Advanced Materials Processing and Analysis Center, Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA
- Nanoscience Technology Center (NSTC), and Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32816, USA
| | - Celso V. Nakamura
- Post-Graduate Program in Pharmaceutical Sciences, State University of Maringá (UEM), Maringá 87020900, Paraná, Brazil
- Department of Basic Health Sciences, State University of Maringá (UEM), Maringá 87020900, Paraná, Brazil
| | - Sueli O. S. Lautenschlager
- Post-Graduate Program in Pharmaceutical Sciences, State University of Maringá (UEM), Maringá 87020900, Paraná, Brazil
- Department of Basic Health Sciences, State University of Maringá (UEM), Maringá 87020900, Paraná, Brazil
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3
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Jing W, Xiaolan C, Yu C, Feng Q, Haifeng Y. Pharmacological effects and mechanisms of tannic acid. Biomed Pharmacother 2022; 154:113561. [PMID: 36029537 DOI: 10.1016/j.biopha.2022.113561] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/04/2022] [Accepted: 08/14/2022] [Indexed: 12/18/2022] Open
Abstract
In recent years, increasing attention has been paid to the pharmacological efficacy of tannins. Tannic acid (TA), the simplest hydrolysable tannin that has been approved by the FDA as a safe food additive, is one of the most important components of these traditional medicines. Studies have shown that TA displays a wide range of pharmacological activities, such as anti-inflammatory, neuroprotective, antitumor, cardioprotective, and anti-pathogenic effects. Here, we summarize the known pharmacological effects and associated mechanisms of TA. We focus on the effect and mechanism of TA in various animal models of inflammatory disease and organ, brain, and cardiovascular injury. Moreover, we discuss the possible molecular targets and signaling pathways of TA, in addition to the pharmacological effects of TA-based nanoparticles and TA in combination with chemotherapeutic drugs.
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Affiliation(s)
- Wang Jing
- Jiangsu Agri-animal Husbandry Vocational College, Taizhou, Jiangsu 225300, PR China.
| | - Chen Xiaolan
- Jiangsu Agri-animal Husbandry Vocational College, Taizhou, Jiangsu 225300, PR China
| | - Chen Yu
- Jiangsu Agri-animal Husbandry Vocational College, Taizhou, Jiangsu 225300, PR China
| | - Qin Feng
- Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Jiangsu Agri-animal Husbandry Vocational College, Taizhou 225300, PR China
| | - Yang Haifeng
- Jiangsu Agri-animal Husbandry Vocational College, Taizhou, Jiangsu 225300, PR China
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4
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Kim SW, Kim DB, Kim HS. Neuroprotective effects of tannic acid in the postischemic brain via direct chelation of Zn 2+. Anim Cells Syst (Seoul) 2022; 26:183-191. [PMID: 36046027 PMCID: PMC9423855 DOI: 10.1080/19768354.2022.2113915] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- Seung Woo Kim
- Department of Biomedical Sciences, College of Medicine, Inha University, Incheon, Korea
| | - Da Bin Kim
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon, Korea
| | - Hong Seok Kim
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon, Korea
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5
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Chen C, Yang H, Yang X, Ma Q. Tannic acid: a crosslinker leading to versatile functional polymeric networks: a review. RSC Adv 2022; 12:7689-7711. [PMID: 35424749 PMCID: PMC8982347 DOI: 10.1039/d1ra07657d] [Citation(s) in RCA: 69] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 02/22/2022] [Indexed: 12/20/2022] Open
Abstract
With the thriving of mussel-inspired polyphenol chemistry as well as the demand for low-cost analogues to polydopamine in adhesive design, tannic acid has gradually become a research focus because of its wide availability, health benefits and special chemical properties. As a natural building block, tannic acid could be used as a crosslinker either supramolecularly or chemically, ensuring versatile functional polymeric networks for various applications. Up to now, a systematic summary on tannic-acid-based networks has still been waiting for an update and outlook. In this review, the common features of tannic acid are summarized in detail, followed by the introduction of covalent and non-covalent crosslinking methods leading to various tannic-acid-based materials. Moreover, recent progress in the application of tannic acid composites is also summarized, including bone regeneration, skin adhesives, wound dressings, drug loading and photothermal conversion. Above all, we also provide further prospects concerning tannic-acid-crosslinked materials.
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Affiliation(s)
- Chen Chen
- Key Laboratory of New Material Research Institute, Department of Acupuncture-Moxibustion and Tuina, Shandong University of Traditional Chinese Medicine Jinan 250355 China
| | - Hao Yang
- The First Affiliated Hospital of Shandong First Medical University (Shandong Qianfoshan Hospital) Jinan 250014 China
| | - Xiao Yang
- The First Affiliated Hospital of Shandong First Medical University (Shandong Qianfoshan Hospital) Jinan 250014 China
| | - Qinghai Ma
- The First Affiliated Hospital of Shandong First Medical University (Shandong Qianfoshan Hospital) Jinan 250014 China
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6
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Wang X, Li H, Meng F, Luo L. Bioadhesive metal-phenolic nanoparticles for enhanced NIR imaging-guided locoregional photothermal/antiangiogenic therapy. J Mater Chem B 2021; 9:4710-4717. [PMID: 34076029 DOI: 10.1039/d1tb00599e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Locoregional drug delivery has emerged as a promising solution to the problems associated with intravenously administered antitumor agents, such as systemic toxicity and insufficient drug accumulation at tumor sites. Herein, we have developed an adhesive nanoparticle (NP)-based drug delivery system, using natural bioadhesive tannic acid (TA) and metal ions (Fe3+), for locoregional photothermal and antiangiogenic synergistic cancer therapy. In this study, a new near-infrared (NIR) photothermal agent indocyanine green (IR820) and an antiangiogenic agent sorafenib (SRF) were co-encapsulated in a TA-Fe complex (SIF@TA-Fe). The SIF@TA-Fe NPs exhibited super adhesion, antiangiogenesis, and efficient cellular uptake. Moreover, SIF@TA-Fe NPs showed a synergistic antitumor effect in vivo, including high tumor inhibition rate, excellent survival extension, and low risk of recurrence, resulting from the prolonged retention of the NPs in the tumor. Thus, this adhesive SIF@TA-Fe NP-based therapeutic system provides a promising approach for locoregional drug delivery of combined cancer therapy.
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Affiliation(s)
- Xiuxia Wang
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Hongyu Li
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Fanling Meng
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Liang Luo
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
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7
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Fernandez-Gonzalez P, Mas-Sanchez A, Garriga P. Polyphenols and Visual Health: Potential Effects on Degenerative Retinal Diseases. Molecules 2021; 26:3407. [PMID: 34199888 PMCID: PMC8200069 DOI: 10.3390/molecules26113407] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 12/26/2022] Open
Abstract
Dietary polyphenols are a group of natural compounds that have been proposed to have beneficial effects on human health. They were first known for their antioxidant properties, but several studies over the years have shown that these compounds can exert protective effects against chronic diseases. Nonetheless, the mechanisms underlying these potential benefits are still uncertain and contradictory effects have been reported. In this review, we analyze the potential effects of polyphenol compounds on some visual diseases, with a special focus on retinal degenerative diseases. Current effective therapies for the treatment of such retinal diseases are lacking and new strategies need to be developed. For this reason, there is currently a renewed interest in finding novel ligands (or known ligands with previously unexpected features) that could bind to retinal photoreceptors and modulate their molecular properties. Some polyphenols, especially flavonoids (e.g., quercetin and tannic acid), could attenuate light-induced receptor damage and promote visual health benefits. Recent evidence suggests that certain flavonoids could help stabilize the correctly folded conformation of the visual photoreceptor protein rhodopsin and offset the deleterious effect of retinitis pigmentosa mutations. In this regard, certain polyphenols, like the flavonoids mentioned before, have been shown to improve the stability, expression, regeneration and folding of rhodopsin mutants in experimental in vitro studies. Moreover, these compounds appear to improve the integration of the receptor into the cell membrane while acting against oxidative stress at the same time. We anticipate that polyphenol compounds can be used to target visual photoreceptor proteins, such as rhodopsin, in a way that has only been recently proposed and that these can be used in novel approaches for the treatment of retinal degenerative diseases like retinitis pigmentosa; however, studies in this field are limited and further research is needed in order to properly characterize the effects of these compounds on retinal degenerative diseases through the proposed mechanisms.
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Affiliation(s)
| | | | - Pere Garriga
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d’Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, 08222 Terrassa, Spain; (P.F.-G.); (A.M.-S.)
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8
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Daré RG, Nakamura CV, Ximenes VF, Lautenschlager SOS. Tannic acid, a promising anti-photoaging agent: Evidences of its antioxidant and anti-wrinkle potentials, and its ability to prevent photodamage and MMP-1 expression in L929 fibroblasts exposed to UVB. Free Radic Biol Med 2020; 160:342-355. [PMID: 32858160 DOI: 10.1016/j.freeradbiomed.2020.08.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/05/2020] [Accepted: 08/19/2020] [Indexed: 02/09/2023]
Abstract
Chronic and unprotect UV exposure leads to skin oxidative stress, following accumulation of damaged cellular components and downstream activation of specific signaling pathways, culminating in premature skin aging (photoaging). In this concern, polyphenols have been proposed for the prevention of skin disorders UV-generated. In the present study, we compared gallic acid (GA) and tannic acid (TA) regarding their potentials in prevent photoaging, using cell-free assays. The most promising compound was further investigated for its photoprotection abilities in UVB-irradiated L929 fibroblasts. TA was more efficient in scavenging radicals DPPH•, superoxide anion, peroxyl, nitric oxide and peroxynitrite, and to reduce ferric ions. Although GA and TA exhibited similar inhibitory activity towards collagenase, TA was more potent in inhibit elastase. In addition, TA presented a broader UV absorption spectrum. Furthermore, TA treatment in UVB-irradiated cells attenuated redox imbalance, as observed by its ability to inhibit ROS production, NADPH oxidase activation and depletion of endogenous antioxidant defense system. Moreover, TA treatment prevented cellular photodamage and subsequently photoaging, by inhibiting lipid peroxidation, depolarization of mitochondrial transmembrane potential, DNA damage, and MMP-1 expression, a protein closely related to the structural degeneration of the dermis extracellular matrix. In conclusion, the results indicate the potential of TA in act as anti-photoaging agent, due to its potent antioxidant, anti-collagenase and anti-elastase activities, and UV-absorption effects, and its ability in prevent oxidative stress, oxidative damages and MMP-1 induction in UVB-irradiated L929 fibroblasts.
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Affiliation(s)
- Regina G Daré
- Post-Graduate Program in Pharmaceutical Sciences, State University of Maringá (UEM), Maringá, Paraná, 87020900, Brazil
| | - Celso V Nakamura
- Post-Graduate Program in Pharmaceutical Sciences, State University of Maringá (UEM), Maringá, Paraná, 87020900, Brazil; Department of Basic Health Sciences, State University of Maringá (UEM), Maringá, Paraná, 87020900, Brazil
| | - Valdecir F Ximenes
- Department of Chemistry, Faculty of Sciences, State University of São Paulo (UNESP), Bauru, São Paulo, 17033360, Brazil
| | - Sueli O S Lautenschlager
- Post-Graduate Program in Pharmaceutical Sciences, State University of Maringá (UEM), Maringá, Paraná, 87020900, Brazil; Department of Basic Health Sciences, State University of Maringá (UEM), Maringá, Paraná, 87020900, Brazil.
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9
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Rong X, Xiang L, Li Y, Yang H, Chen W, Li L, Liang D, Zhou X. Chronic Periodontitis and Alzheimer Disease: A Putative Link of Serum Proteins Identification by 2D-DIGE Proteomics. Front Aging Neurosci 2020; 12:248. [PMID: 32973486 PMCID: PMC7472842 DOI: 10.3389/fnagi.2020.00248] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 07/20/2020] [Indexed: 01/16/2023] Open
Abstract
Increasing evidence indicates Chronic Periodontitis (CP) is a comorbidity of Alzheimer’s disease (AD), which is the most common form of age-related dementia, and for the latter, effective diagnostic and treatment strategies are lacking. Although inflammation is present in both diseases, the exact mechanisms and cross-links between CP and AD are poorly understood; and a direct association between the two has not been reported. This study aimed to identify a direct serum proteins link between AD and CP. Two-dimensional differential in-gel electrophoresis was employed to analyze serum samples from 12 CP patients and 12 age-matched controls. Furthermore, to determine the molecular link between CP and AD, neuroblastoma SK-N-SH APPwt cells were treated with 1 μg/ml of lipopolysaccharide from Porphyromonas gingivalis (P.g-LPS). Ten differentially expressed proteins were identified in CP patients. Among them, nine proteins were up-regulated, and one protein was down-regulated. Of the 10 differentially expressed proteins, five proteins were reportedly involved in the pathology of AD: Cofilin-2, Cathepsin B, Clusterin, Triosephosphate isomerase, and inter-alpha-trypsin inhibitor heavy chain H4 (ITI-H4). Western blotting indicated significantly higher expression of Cofilin-2, Cathepsin B, and Clusterin and lower expression of ITI-H4 in the CP group than in the Control group. The serum concentration of Cathepsin B has a good correlation with MMSE scores. Moreover, the protein level of Cathepsin B (but not that of ADAM10 and BACE1) increased significantly along with a prominent increase in Aβ1–40 and Aβ1–42 in the cell lysates of P.g-LPS-treated SK-N-SH APPwt cells. Cathepsin B inhibition resulted in a sharp decrease in Aβ1–40 and Aβ1–42 in the cell lysates. Furthermore, TNF-α was one of the most important inflammatory cytokines for the P.g-LPS-induced Cathepsin B upregulation in SK-N-SH APPwt cells. These results show that CP and AD share an association, while Cathepsin B could be a key link between the two diseases. The discovery of the identical serum proteins provides a potential mechanism underlying the increased risk of AD in CP patients, which could be critical for elucidating the pathophysiology of AD.
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Affiliation(s)
- Xianfang Rong
- Department of Stomatology, Shenzhen Baoan Women's and Children's Hospital, Jinan University, Shenzhen, China
| | - Liping Xiang
- Department of Stomatology, Shenzhen Baoan Women's and Children's Hospital, Jinan University, Shenzhen, China
| | - Yanfen Li
- Department of Stomatology, Shenzhen Baoan Women's and Children's Hospital, Jinan University, Shenzhen, China
| | - Hongfa Yang
- Department of Cardiology, The Second Affiliated Hospital of the University of South China, Hengyang, China
| | - Weijian Chen
- Department of Stomatology, Shenzhen Baoan Women's and Children's Hospital, Jinan University, Shenzhen, China
| | - Lei Li
- Department of Stomatology, Shenzhen Baoan Women's and Children's Hospital, Jinan University, Shenzhen, China
| | - Defeng Liang
- Department of Stomatology, Shenzhen Baoan Women's and Children's Hospital, Jinan University, Shenzhen, China
| | - Xincai Zhou
- Department of Stomatology, Shenzhen Baoan Women's and Children's Hospital, Jinan University, Shenzhen, China
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Detrimental Effects of UVB on Retinal Pigment Epithelial Cells and Its Role in Age-Related Macular Degeneration. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:1904178. [PMID: 32855763 PMCID: PMC7443017 DOI: 10.1155/2020/1904178] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 07/03/2020] [Accepted: 07/08/2020] [Indexed: 11/25/2022]
Abstract
Retinal pigment epithelial (RPE) cells are an essential part of the human eye because they not only mediate and control the transfer of fluids and solutes but also protect the retina against photooxidative damage and renew photoreceptor cells through phagocytosis. However, their function necessitates cumulative exposure to the sun resulting in UV damage, which may lead to the development of age-related macular degeneration (AMD). Several studies have shown that UVB induces direct DNA damage and oxidative stress in RPE cells by increasing ROS and dysregulating endogenous antioxidants. Activation of different signaling pathways connected to inflammation, cell cycle arrest, and intrinsic apoptosis was reported as well. Besides that, essential functions like phagocytosis, osmoregulation, and water permeability of RPE cells were also affected. Although the melanin within RPE cells can act as a photoprotectant, this photoprotection decreases with age. Nevertheless, the changes in lens epithelium-derived growth factor (LEDGF) and autophagic activity or application of bioactive compounds from natural products can reverse the detrimental effect of UVB. Additionally, in vivo studies on the whole retina demonstrated that UVB irradiation induces gene and protein level dysregulation, indicating cellular stress and aberrations in the chromosome level. Morphological changes like retinal depigmentation and drusen formation were noted as well which is similar to the etiology of AMD, suggesting the connection of UVB damage with AMD. Therefore, future studies, which include mechanism studies via in vitro or in vivo and other potential bioactive compounds, should be pursued for a better understanding of the involvement of UVB in AMD.
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Wang R, Wang X, Zhan Y, Xu Z, Xu Z, Feng X, Li S, Xu H. A Dual Network Hydrogel Sunscreen Based on Poly-γ-glutamic Acid/Tannic Acid Demonstrates Excellent Anti-UV, Self-Recovery, and Skin-Integration Capacities. ACS APPLIED MATERIALS & INTERFACES 2019; 11:37502-37512. [PMID: 31544451 DOI: 10.1021/acsami.9b14538] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Novel sunscreen products based on bioadhesive/gel systems that can prevent the skin penetration behaviors of UV filters have attracted increasing attention in recent years. However, integration is very difficult to achieve and control on the wet surface of the skin under sweaty/dynamic physiological conditions, resulting in functional failure. Herein, we demonstrated the fabrication of a novel dual-network hydrogel sunscreen (DNHS) based on poly-γ-glutamic acid (γ-PGA) and tannic acid (TA), which demonstrated prominent UV protection properties across broad UVA and UVB regions (360-275 nm). Due to a three-dimensional network microstructure and a highly hydrated nature that mimics the extracellular matrix of natural skin, DNHS can perfectly match the skin surface without irritation and sensitization. In addition, the intermolecular hydrogen bond interactions of γ-PGA and TA provide an important driving force for coacervation, which endows the DNHS with remarkable self-recovery properties (within 60 s). Moreover, due to the multiple interfacial interactions between γ-PGA/TA and the protein-rich skin tissue surfaces, DNHS simultaneously possesses excellent skin-integration and water-resistance capacities, and it can be readily removed on demand. Our results highlight the potential of the DNHS to be used in next-generation sunscreens by providing long-term and stable UV protection functions even under sweaty/dynamic physiological conditions.
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Affiliation(s)
- Rui Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 211816 , China
- College of Food Science and Light Industry , Nanjing Tech University , Nanjing 211816 , China
| | - Xuexue Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 211816 , China
- College of Food Science and Light Industry , Nanjing Tech University , Nanjing 211816 , China
| | - Yijing Zhan
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 211816 , China
- College of Food Science and Light Industry , Nanjing Tech University , Nanjing 211816 , China
| | - Zheng Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 211816 , China
- College of Food Science and Light Industry , Nanjing Tech University , Nanjing 211816 , China
| | - Zongqi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 211816 , China
- College of Food Science and Light Industry , Nanjing Tech University , Nanjing 211816 , China
| | - Xiaohai Feng
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 211816 , China
- College of Food Science and Light Industry , Nanjing Tech University , Nanjing 211816 , China
| | - Sha Li
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 211816 , China
- College of Food Science and Light Industry , Nanjing Tech University , Nanjing 211816 , China
| | - Hong Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 211816 , China
- College of Food Science and Light Industry , Nanjing Tech University , Nanjing 211816 , China
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12
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Chen Y, Guo M, Yang J, Chen J, Xie B, Sun Z. Potential TSPO Ligand and Photooxidation Quencher Isorenieratene from Arctic Ocean Rhodococcus sp. B7740. Mar Drugs 2019; 17:md17060316. [PMID: 31146377 PMCID: PMC6627809 DOI: 10.3390/md17060316] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 05/18/2019] [Accepted: 05/20/2019] [Indexed: 12/18/2022] Open
Abstract
Due to its special aromatic structure, isorenieratene is thought to be an active natural antioxidant and photo/UV damage inhibitor. In this work, isorenieratene that was extracted from Rhodococcus sp. B7740 isolated from the Arctic Ocean, showed excellent scavenging ability of both singlet oxygen and hydroxyl radical in the UVB-induced auto-oxidation process using the EPR method. Within an ARPE-19 cell model damaged by UVB radiation, isorenieratene showed fine protective effects (1.13 ± 0.03 fold) compared with macular xanthophylls (MXs) through upregulating of tspo. The molecular docking was firstly performed to investigate the interaction of isorenieratene with TSPO as a special ligand. Results showed isorenieratene might form a better binding conformation (S-score −8.5438) than MXs and indicate that isorenieratene not only can function as a direct antioxidant but also activate tspo in ARPE-19 cells. Thus, isorenieratene might ease the UV-related damages including age-related macular degeneration (AMD).
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Affiliation(s)
- Yashu Chen
- Natural Product Laboratory, Department of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Mengyao Guo
- Agricultural Bioinformatics Key Laboratory of Hubei Province, College of informatics, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jifang Yang
- College of Biological and Environmental Science, Zhejiang Wanli University, Ningbo 315100, China.
| | - Jigang Chen
- College of Biological and Environmental Science, Zhejiang Wanli University, Ningbo 315100, China.
| | - Bijun Xie
- Natural Product Laboratory, Department of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Zhida Sun
- Natural Product Laboratory, Department of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
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Dietary Polyphenols in Age-Related Macular Degeneration: Protection against Oxidative Stress and Beyond. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:9682318. [PMID: 31019656 PMCID: PMC6451822 DOI: 10.1155/2019/9682318] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 02/12/2019] [Indexed: 12/16/2022]
Abstract
Age-related macular degeneration (AMD) is a multifactorial disease of the retina featured by degeneration and loss of photoreceptors and retinal pigment epithelium (RPE) cells with oxidative stress playing a role in its pathology. Although systematic reviews do not support the protective role of diet rich in antioxidants against AMD, dietary polyphenols (DPs) have been reported to have beneficial effects on vision. Some of them, such as quercetin and cyanidin-3-glucoside, can directly scavenge reactive oxygen species (ROS) due to the presence of two hydroxyl groups in their B ring structure. Apart from direct ROS scavenging, DPs can lower oxidative stress in several other pathways. Many DPs induce NRF2 (nuclear factor, erythroid 2-like 2) activation and expression of phase II enzymes that are under transcriptional control of this factor. DPs can inhibit A2E photooxidation in RPE cells, which is a source of oxidative stress. Anti-inflammatory action of DPs in RPE cells is associated with regulation of various interleukins and signaling pathways, including IL-6/JAK2 (Janus kinase 2)/STAT3. Some DPs can improve impaired cellular waste clearance, including AMD-specific deficient phagocytosis of the Aβ42 peptide and autophagy.
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Yeo IJ, Park JH, Jang JS, Lee DY, Park JE, Choi YE, Joo JH, Song JK, Jeon HO, Hong JT. Inhibitory effect of Carnosol on UVB-induced inflammation via inhibition of STAT3. Arch Pharm Res 2018; 42:274-283. [PMID: 30430364 PMCID: PMC6426997 DOI: 10.1007/s12272-018-1088-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 11/01/2018] [Indexed: 12/11/2022]
Abstract
Ultraviolet B (UVB) irradiation causes sunburn, inflammatory responses, dysregulation of immune function, oxidative stress, DNA damage and photocarcinogenesis on skin. Rosemary (Rosmarinus officinalis L.) has been reported to inhibit inflammation. Carnosol, a major component of Rosemary, has prominent anti-inflammatory effects. However, its protective effect on UVB-induced inflammatory skin responses has not yet been reported. Here, we investigated the effectiveness of carnosol on UVB-induced inflammation. We examined the anti-inflammation effect of topical application of carnosol (0.05 µg/cm2) on UVB (540 mJ/cm2, for 3 successive days)-induced skin inflammation in HR1 mice. Topical application of carnosol inhibited UVB-induced erythema, epidermal thickness, inflammatory responses in HR1 mice. Carnosol reduced the level of Immunoglobulin-E and IL-1β in blood serum of UVB-induced mice. Carnosol also significantly inhibited the UVB-induced expression of inflammatory marker protein (iNOS and COX-2) in back skin of mice. In addition, carnosol treated skin decreased activation of STAT3, a transcriptional factor regulating inflammatory genes. Our study suggested that carnosol has protective effects on skin inflammatory skin damages by UVB.
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Affiliation(s)
- In Jun Yeo
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Ju Ho Park
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Jun Sung Jang
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Do Yeon Lee
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Jung Eun Park
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Ye Eun Choi
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Jung Hun Joo
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Joo Kyung Song
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Hyung Ok Jeon
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea
| | - Jin Tae Hong
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaengmyeong 1-ro, Osong-eup, Heungduk-gu, Cheongju, Chungbuk, 361-951, Republic of Korea.
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Wang H, Liu N, Li R, Tian J, Hu W, Zhang J. Nephropreventing effect of hypoxia-inducible factor 1α in a rat model of ischaemic/reperfusion acute kidney injury. Clin Exp Pharmacol Physiol 2018; 45:1076-1082. [PMID: 29667230 DOI: 10.1111/1440-1681.12947] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 03/24/2018] [Accepted: 03/26/2018] [Indexed: 11/28/2022]
Abstract
Acute kidney injury (AKI) occurs in 5% of hospitalized patients and in 50% of sepsis patients with acute renal dysfunction. However, there have been no safe and effective therapeutic strategies. The hypoxia condition is closely related to renal injury and function under AKI. As hypoxia-inducible factor 1α (HIF-1α) is critical for the cellular response to hypoxia, we investigated the protective effect of HIF-1α in a rat AKI model. We found that HIF-1α injection improved the survival of rat with AKI, and the level of creatinine and blood urea nitrogen (BUN) was also increased. Our data showed that HIF-1α treatment significantly alleviated ischaemic/reperfusion injury to kidney tubules and nephrocytes. We also found the downstream factors, such as EPOR, VEGF, and PHD3, were also upregulated by HIF-1α. Finally, it was observed that HIF-1α treatment also increased the percentage of adult resident progenitor cells (ARPC) in vitro and in vivo. In conclusion, HIF-1α plays a protective role in the ischaemic AKI model through stimulating the proliferation of ARPC, and our study provided a potential therapeutic strategy for AKI.
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Affiliation(s)
- Huiling Wang
- Department of Nephrology, 455th Hospital, The Institute of Nephrology in Nanjing Military Command, Shanghai, China
| | - Nanmei Liu
- Department of Nephrology, 455th Hospital, The Institute of Nephrology in Nanjing Military Command, Shanghai, China
| | - Rui Li
- Department of Nephrology, 455th Hospital, The Institute of Nephrology in Nanjing Military Command, Shanghai, China
| | - Jun Tian
- Department of Nephrology, 455th Hospital, The Institute of Nephrology in Nanjing Military Command, Shanghai, China
| | - Weifeng Hu
- Department of Nephrology, 455th Hospital, The Institute of Nephrology in Nanjing Military Command, Shanghai, China
| | - Jinyuan Zhang
- Department of Nephrology, 455th Hospital, The Institute of Nephrology in Nanjing Military Command, Shanghai, China
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Ryeom GGM, Bang WJ, Kim YB, Lee GE. Gallotannin Improves the Photoaged-Related Proteins by Extracellular Signal-Regulated Kinases/c-Jun N-Terminal Kinases Signaling Pathway in Human Epidermal Keratinocyte Cells. J Med Food 2018; 21:785-792. [PMID: 30004816 DOI: 10.1089/jmf.2017.4096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Tannins are a type of polyphenols found in several fruits such as grapes and berries, and nuts such as aronias and acorns. Both hydrolyzable tannins and condensed tannins are referred to as tannins. Among the hydrolyzable tannins, gallotannin has a strong antioxidative property and is known to protect the skin by inhibiting the precursors of elastolytic enzymes. However, its mechanism of protection against ultraviolet B (UVB) damage in human fibroblasts and keratinocytes has not yet been elucidated. In this study, we investigate the antioxidant and antiaging effect of gallotannin on UVB-irradiated human cells by studying its effect on extracellular signal-regulated kinases/c-Jun N-terminal kinases (EKRs/JNKs) signaling related to cell growth and differentiation/stress apoptosis. The results showed that gallotannin improved collagen synthesis, reduced metalloproteinase-1 (MMP-1) expression in a dose-dependent manner, and downregulated MMP-1 levels through the ERK/JNK signaling pathway in UVB-irradiated human cells. Gallotannin also increased glutathione but did not increase transforming growth factor beta 1, which induces fibrosis. We propose that gallotannin is a novel agent for protection against UVB, and acts as an antiaging agent that can be used in food, pharmaceuticals, and cosmetics.
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Affiliation(s)
- Gyoseon Goya M Ryeom
- 1 Skin Science, R&D Center , iPEERES Cosmetics Co. Ltd., Anseong-si, Republic of Korea
| | - Weon Jeong Bang
- 1 Skin Science, R&D Center , iPEERES Cosmetics Co. Ltd., Anseong-si, Republic of Korea
| | - Young Bu Kim
- 2 R&D Center , iPEERES Cosmetics Co. Ltd., Anseong-si, Republic of Korea
| | - Go Eun Lee
- 1 Skin Science, R&D Center , iPEERES Cosmetics Co. Ltd., Anseong-si, Republic of Korea
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Pattarayan D, Sivanantham A, Bethunaickan R, Palanichamy R, Rajasekaran S. Tannic acid modulates fibroblast proliferation and differentiation in response to pro‐fibrotic stimuli. J Cell Biochem 2018; 119:6732-6742. [DOI: 10.1002/jcb.26866] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 03/15/2018] [Indexed: 12/25/2022]
Affiliation(s)
| | - Ayyanar Sivanantham
- Department of BiotechnologyAnna UniversityBIT‐CampusTiruchirappalliTamil NaduIndia
| | - Ramalingam Bethunaickan
- Department of ImmunologyNational Institute for Research in TuberculosisChennaiTamil NaduIndia
| | - Rajaguru Palanichamy
- Department of BiotechnologyAnna UniversityBIT‐CampusTiruchirappalliTamil NaduIndia
| | - Subbiah Rajasekaran
- Department of BiotechnologyAnna UniversityBIT‐CampusTiruchirappalliTamil NaduIndia
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18
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Xu Z, Sun T, Li W, Sun X. Inhibiting effects of dietary polyphenols on chronic eye diseases. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.10.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Pattarayan D, Sivanantham A, Krishnaswami V, Loganathan L, Palanichamy R, Natesan S, Muthusamy K, Rajasekaran S. Tannic acid attenuates TGF-β1-induced epithelial-to-mesenchymal transition by effectively intervening TGF-β signaling in lung epithelial cells. J Cell Physiol 2017; 233:2513-2525. [DOI: 10.1002/jcp.26127] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 08/01/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Dhamotharan Pattarayan
- Department of Biotechnology; Anna University; BIT-Campus; Tiruchirappalli Tamil Nadu India
| | - Ayyanar Sivanantham
- Department of Biotechnology; Anna University; BIT-Campus; Tiruchirappalli Tamil Nadu India
| | - Venkateshwaran Krishnaswami
- Laboratory for Lipid Based Systems; Department of Pharmaceutical Technology; Anna University; BIT-Campus; Tiruchirappalli Tamil Nadu India
| | - Lakshmanan Loganathan
- Pharmacogenomics and CADD Lab; Department of Bioinformatics; Alagappa University; Karaikudi Tamil Nadu India
| | - Rajaguru Palanichamy
- Department of Biotechnology; Anna University; BIT-Campus; Tiruchirappalli Tamil Nadu India
| | - Subramanian Natesan
- Laboratory for Lipid Based Systems; Department of Pharmaceutical Technology; Anna University; BIT-Campus; Tiruchirappalli Tamil Nadu India
| | - Karthikeyan Muthusamy
- Pharmacogenomics and CADD Lab; Department of Bioinformatics; Alagappa University; Karaikudi Tamil Nadu India
| | - Subbiah Rajasekaran
- Department of Biotechnology; Anna University; BIT-Campus; Tiruchirappalli Tamil Nadu India
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Zahir-Jouzdani F, Atyabi F, Mojtabavi N. Interleukin-6 participation in pathology of ocular diseases. ACTA ACUST UNITED AC 2017. [PMID: 28629694 DOI: 10.1016/j.pathophys.2017.05.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Interleukin-6 (IL-6) is a multifunctional cytokine that affects a variety of cells in the body such as osteoclasts, hepatocytes, endothelial cells, epithelial cells, white and red blood cells and etc. Elevated levels of IL-6 have been detected in many ocular diseases. Studies show that IL-6 has a major role in the pathology of glaucoma, CRVO, macular edema, ocular neovascularization, posterior capsule opacity formation, keratitis, dry eye disease, allergic eye disease, ocular autoimmune disease, corneal chemical burn, ocular inflammation and so on. IL-6 does its effects through the classic or trans-signal pathways in cells. Blocking of IL-6 signal pathways via Tocilizumab or other chemicals and therapeutics will help to overcome complications related to ocular diseases.
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Affiliation(s)
- Forouhe Zahir-Jouzdani
- Department of Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tehran University of Medical Science, Tehran, Iran; Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 14174, Iran
| | - Fatemeh Atyabi
- Department of Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tehran University of Medical Science, Tehran, Iran; Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 14174, Iran.
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Abstract
Polyphenols are a widely used class of compounds in dermatology. While phenol itself, the most basic member of the phenol family, is chemically synthesized, most polyphenolic compounds are found in plants and form part of their defense mechanism against decomposition. Polyphenolic compounds, which include phenolic acids, flavonoids, stilbenes, and lignans, play an integral role in preventing the attack on plants by bacteria and fungi, as well as serving as cross-links in plant polymers. There is also mounting evidence that polyphenolic compounds play an important role in human health as well. One of the most important benefits, which puts them in the spotlight of current studies, is their antitumor profile. Some of these polyphenolic compounds have already presented promising results in either in vitro or in vivo studies for non-melanoma skin cancer and melanoma. These compounds act on several biomolecular pathways including cell division cycle arrest, autophagy, and apoptosis. Indeed, such natural compounds may be of potential for both preventive and therapeutic fields of cancer. This review evaluates the existing scientific literature in order to provide support for new research opportunities using polyphenolic compounds in oncodermatology.
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Affiliation(s)
- Adilson Costa
- Department of Dermatology, Emory University School of Medicine, Atlanta Veterans Administration Medical Center, Winship Cancer Institute, 101 Woodruff Circle, Atlanta, GA, 30322, USA
| | - Michael Yi Bonner
- Department of Dermatology, Emory University School of Medicine, Atlanta Veterans Administration Medical Center, Winship Cancer Institute, 101 Woodruff Circle, Atlanta, GA, 30322, USA
| | - Jack L Arbiser
- Department of Dermatology, Emory University School of Medicine, Atlanta Veterans Administration Medical Center, Winship Cancer Institute, 101 Woodruff Circle, Atlanta, GA, 30322, USA.
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Agilan B, Rajendra Prasad N, Kanimozhi G, Karthikeyan R, Ganesan M, Mohana S, Velmurugan D, Ananthakrishnan D. Caffeic Acid Inhibits Chronic UVB-Induced Cellular Proliferation Through JAK-STAT3 Signaling in Mouse Skin. Photochem Photobiol 2016; 92:467-74. [DOI: 10.1111/php.12588] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 02/29/2016] [Indexed: 12/29/2022]
Affiliation(s)
- Balupillai Agilan
- Department of Biochemistry and Biotechnology; Annamalai University; Chidambaram Tamilnadu India
| | - N. Rajendra Prasad
- Department of Biochemistry and Biotechnology; Annamalai University; Chidambaram Tamilnadu India
| | - Govindasamy Kanimozhi
- Department of Biochemistry and Biotechnology; Annamalai University; Chidambaram Tamilnadu India
| | - Ramasamy Karthikeyan
- Department of Biochemistry and Biotechnology; Annamalai University; Chidambaram Tamilnadu India
| | - Muthusamy Ganesan
- Department of Biochemistry and Biotechnology; Annamalai University; Chidambaram Tamilnadu India
| | - Shanmugam Mohana
- Department of Biochemistry and Biotechnology; Annamalai University; Chidambaram Tamilnadu India
| | - Devadasan Velmurugan
- Bioinformatics Infrastructure Facility (BIF); University of Madras; Chennai Tamilnadu India
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Dayang W, Jinsong Z. Taurine inhibits interleukin-6 expression and release induced by ultraviolet B exposure to human retinal pigment epithelium cells. Cutan Ocul Toxicol 2014; 34:189-94. [PMID: 25198400 DOI: 10.3109/15569527.2014.944649] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The massive uptake of compatible osmolytes is a self-protective response shared by retina exposed to hypertonic stress and ultraviolet stress. OBJECTIVE This study aimed to investigate the protective effects of taurine against ultraviolet damage in human retinal pigment epithelium cells. METHODS Real-time PCR, radioimmunoassay, ELISA and immunoassay were used to measure osmolyte uptake and IL-6 expression. RESULTS Compared with normotonic stress, hypertonic stress led to an induction of osmolyte uptake including betaine, myoinositol and taurine. UVB exposure upregulated osmolyte transporter mRNA expression and increased osmolyte uptake respectively. Especially, taurine suppressed UVB-induced IL-6 mRNA expression significantly. The accumulation of IL-6 in UVB-exposed human retinal pigment epithelial cells supernatant was much slower when the cells were preincubated with taurine. Moreover, taurine suppressed IL-6 concentration in aqueous humour. CONCLUSION The effect of compatible osmolyte taurine on IL-6 expression and release may play an important role in cell resistance and adaption to UVB exposure.
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Affiliation(s)
- Wu Dayang
- Department of Ophthalmology, The First Affiliated Hospital of Liaoning Medical University , Jinzhou , P.R. China and
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Silk lutein extract and its combination with vitamin E reduce UVB-mediated oxidative damage to retinal pigment epithelial cells. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 124:34-41. [DOI: 10.1016/j.jphotobiol.2013.04.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Revised: 03/09/2013] [Accepted: 04/09/2013] [Indexed: 11/20/2022]
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Patel AK, Syeda S, Hackam AS. Signal transducer and activator of transcription 3 (STAT3) signaling in retinal pigment epithelium cells. JAKSTAT 2013; 2:e25434. [PMID: 24416648 PMCID: PMC3876436 DOI: 10.4161/jkst.25434] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 06/14/2013] [Accepted: 06/17/2013] [Indexed: 11/19/2022] Open
Abstract
The retinal pigmented epithelium (RPE) is a monolayer of specialized epithelial cells located between the photoreceptors of the retina and the choroidal blood supply. The RPE is essential for maintaining retinal health and vision. Recent findings identified STAT3 as a newly recognized regulator of RPE survival, inflammatory response, visual cycle maintenance, and cytokine release. Additionally, STAT3 is implicated in retinal diseases that affect the RPE, including the common blinding disease age-related macular degeneration. Determining how STAT3 influences RPE functions ultimately may lead to novel therapeutics for retinal disease. In this review, we summarize the roles of JAK-STAT3 signaling in the RPE, and its potential contribution to retinal degenerations.
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Affiliation(s)
- Amit K Patel
- Bascom Palmer Eye Institute; University of Miami Miller School of Medicine; Miami, FL USA
| | - Sarah Syeda
- Bascom Palmer Eye Institute; University of Miami Miller School of Medicine; Miami, FL USA
| | - Abigail S Hackam
- Bascom Palmer Eye Institute; University of Miami Miller School of Medicine; Miami, FL USA
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The role of SIRT1/AKT/ERK pathway in ultraviolet B induced damage on human retinal pigment epithelial cells. Toxicol In Vitro 2013; 27:1728-36. [PMID: 23673314 DOI: 10.1016/j.tiv.2013.05.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Revised: 05/01/2013] [Accepted: 05/03/2013] [Indexed: 11/23/2022]
Abstract
Ultraviolet (UV)-induced damage plays a major role in ocular diseases, such as cataracts and retinal degeneration. UVB may also cause retinal phototoxicity and photic retinopathy. In this study, we explored the effects of UVB on the cell cycle and the role of silent mating type information regulation 2 homolog 1 (SIRT1) in the UVB-induced damage. UVB dose-dependently suppressed the growth of retinal pigment epithelial (RPE) cells by activating the phosphatidylinositol 3-kinase (PI3K) pathway and triggering cell cycle arrest at the S phase. SIRT1, an NAD-dependent histone deacetylase, is involved in multiple biological processes, such as the stress response and the regulation of the cell cycle. However, its role in the effects of UVB on RPE cells is unclear. We showed that UVB down-regulates SIRT1 expression in a dose-dependent manner. Resveratrol, an SIRT1 activator, prevented the UVB-induced damage by inhibiting AKT and ERK phosphorylation. A specific PI3K inhibitor attenuated the UVB-induced ERK1/2 and p53 phosphorylation. Finally, UVB activated the PI3K/AKT/ERK pathway by reducing the expression of SIRT1 in ARPE-19 cells. Our study, therefore, illustrated the molecular mechanisms of UVB-induced phototoxicity and damage of RPE cells. SIRT1 and resveratrol may be significant regulators, protecting against UVB-induced injury.
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Mantel I, Ambresin A, Moetteli L, Droz I, Roduit R, Munier FL, Schorderet DF. Complement factor B polymorphism and the phenotype of early age-related macular degeneration. Ophthalmic Genet 2013; 35:12-7. [PMID: 23373431 DOI: 10.3109/13816810.2013.766217] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE Age-related macular degeneration (AMD) has been associated with a number of polymorphisms in genes in the complement pathway. We examined the potential genotype-phenotype correlation of complement factor B (CFB) (R32Q) polymorphisms in Caucasian patients with AMD. METHODS Data from a Central European cohort of 349 patients with early AMD in at least one eye were analyzed for potential associations of the CFB (R32Q/rs641153) polymorphism with phenotypic features of early AMD. Early AMD was classified according to the International Classification and Grading System into predominant drusen size, largest drusen, drusen covered surface, central or ring-like location, peripheral drusen, and pigmentary changes. The potential association with single nucleotide polymorphisms on CFB (R32Q/rs641153) was evaluated for all patients, corrected for age, sex, and the polymorphisms of CFH (Y402H) and ARMS2 (A69S). RESULTS CFB (R32Q) polymorphisms showed a significant association with smaller drusen size (largest drusen ≤ 250 µm, p = 0.021, predominant drusen ≤ 125 µm, p = 0.016), with smaller surface covered by drusen (≤ 10%; p = 0.02), and with more frequent occurrence of peripheral drusen (p = 0.007). No association was found for pigmentary changes. CONCLUSIONS The CFB (R32Q) polymorphism was associated with AMD characterized by small drusen only, and appeared to be protective of large drusen (OR 0.48/0.45) and of larger drusen covered area (OR 0.34). Furthermore, peripheral drusen were more frequently found (OR 2.27). This result supports the role of complement components and their polymorphisms in drusen formation and may enable a better understanding of AMD pathogenesis.
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Affiliation(s)
- Irmela Mantel
- Department of Ophthalmology, University of Lausanne, Jules-Gonin Eye Hospital , Switzerland , and
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