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Liu F, Xu T, He J, Jiang Y, Qu L, Wang L, Ma J, Yang Q, Wu W, Sun D, Chen Y. Exploring the potential of white birch sap: A natural alternative to traditional skin whitening agents with reduced side effects. Heliyon 2024; 10:e26715. [PMID: 38455547 PMCID: PMC10918162 DOI: 10.1016/j.heliyon.2024.e26715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/06/2024] [Accepted: 02/19/2024] [Indexed: 03/09/2024] Open
Abstract
Common tyrosinase (TYR) inhibitors used in cosmetics, such as hydroquinone, kojic acid, and arbutin, can cause side effects including erythema, skin peeling, and dryness. Therefore, the development of natural whitening agents that offer excellent permeability, minimal irritation, and high safety has become a primary focus in the field of TYR inhibitors. In this study, we demonstrate that White birch sap (WBS), within a safe concentration range, effectively reduces TYR activity and melanin content in both B16F10 mouse melanoma cells and zebrafish larvae. Importantly, WBS exhibits minimal irritation to neutrophils in fluorescent zebrafish and does not affect the behavior of adult zebrafish. Furthermore, WBS downregulates the gene expression levels of microphthalmia-associated transcription factor, TYR, tyrosinase-related protein-1, and tyrosinase-related protein-2 in B16F10 cells. In conclusion, our research confirms that WBS, a naturally derived substance, offers high safety and mild effects, making it a promising candidate for a skin-whitening agent.
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Affiliation(s)
- Fan Liu
- Institute of Life Sciences & Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou, 325035, China
| | - Ting Xu
- Institute of Life Sciences & Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou, 325035, China
| | - Jiaxuan He
- Institute of Life Sciences & Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou, 325035, China
| | - Yiting Jiang
- Institute of Life Sciences & Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou, 325035, China
| | - Linkai Qu
- College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Lei Wang
- Institute of Life Sciences & Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou, 325035, China
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325035, China
| | - Jiahui Ma
- Institute of Life Sciences & Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou, 325035, China
| | - Qinsi Yang
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325035, China
| | - Wei Wu
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China
| | - Da Sun
- Institute of Life Sciences & Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou, 325035, China
| | - Yan Chen
- The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, Quzhou, 32400, China
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Matamá T, Costa C, Fernandes B, Araújo R, Cruz CF, Tortosa F, Sheeba CJ, Becker JD, Gomes A, Cavaco-Paulo A. Changing human hair fibre colour and shape from the follicle. J Adv Res 2023:S2090-1232(23)00350-8. [PMID: 37967812 DOI: 10.1016/j.jare.2023.11.013] [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: 12/01/2022] [Revised: 09/21/2023] [Accepted: 11/12/2023] [Indexed: 11/17/2023] Open
Abstract
INTRODUCTION Natural hair curvature and colour are genetically determined human traits, that we intentionally change by applying thermal and chemical treatments to the fibre. Presently, those cosmetic methodologies act externally and their recurrent use is quite detrimental to hair fibre quality and even to our health. OBJECTIVES This work represents a disruptive concept to modify natural hair colour and curvature. We aim to model the fibre phenotype as it is actively produced in the follicle through the topical delivery of specific bioactive molecules to the scalp. METHODS Transcriptome differences between curly and straight hairs were identified by microarray. In scalp samples, the most variable transcripts were mapped by in situ hybridization. Then, by using appropriate cellular models, we screened a chemical library of 1200 generic drugs, searching for molecules that could lead to changes in either fibre colour or curvature. A pilot-scale, single-centre, investigator-initiated, prospective, blind, bilateral (split-scalp) placebo-controlled clinical study with the intervention of cosmetics was conducted to obtain a proof of concept (RNEC n.92938). RESULTS We found 85 genes transcribed significantly different between curly and straight hair, not previously associated with this human trait. Next, we mapped some of the most variable genes to the inner root sheath of follicles, reinforcing the role of this cell layer in fibre shape moulding. From the drug library screening, we selected 3 and 4 hits as modulators of melanin synthesis and gene transcription, respectively, to be further tested in 33 volunteers. The intentional specific hair change occurred: 8 of 14 volunteers exhibited colour changes, and 16 of 19 volunteers presented curvature modifications, by the end of the study. CONCLUSION The promising results obtained are the first step towards future cosmetics, complementary or alternative to current methodologies, taking hair styling to a new level: changing hair from the inside out.
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Affiliation(s)
- Teresa Matamá
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, 4710-057 Braga, Portugal.
| | - Cristiana Costa
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - Bruno Fernandes
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - Rita Araújo
- CBMA - Centre of Molecular and Environmental Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal; CIBIO - Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO - Laboratório Associado, Campus de Vairão, Universidade do Porto, 4485-661 Vairão, Portugal
| | - Célia F Cruz
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - Francisco Tortosa
- Serviço de Anatomia Patológica, CHLN - Hospital de Santa Maria / Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal; Unidade de Anatomia Patológica, Hospital CUF Descobertas, Rua Mário Botas (Parque das Nações), 1998-018, Lisboa, Portugal
| | - Caroline J Sheeba
- ICVS - Life and Health Sciences Research Institute, University of Minho, 4710-057 Braga, Portugal; NIHR Central Commissioning Facility (CCF), Grange House, 15 Church Street, Twickenham, TW1 3NL, UK
| | - Jörg D Becker
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande 6, Oeiras, 2780-156, Portugal; Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, Oeiras, 2780-157, Portugal
| | - Andreia Gomes
- CBMA - Centre of Molecular and Environmental Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal
| | - Artur Cavaco-Paulo
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, 4710-057 Braga, Portugal; Solfarcos - Pharmaceutical and Cosmetic Solutions Ltd, Avenida Imaculada Conceição n. 589, 4700-034 Braga, Portugal.
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Fernandes B, Cavaco-Paulo A, Matamá T. A Comprehensive Review of Mammalian Pigmentation: Paving the Way for Innovative Hair Colour-Changing Cosmetics. BIOLOGY 2023; 12:biology12020290. [PMID: 36829566 PMCID: PMC9953601 DOI: 10.3390/biology12020290] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/26/2023] [Accepted: 02/09/2023] [Indexed: 02/15/2023]
Abstract
The natural colour of hair shafts is formed at the bulb of hair follicles, and it is coupled to the hair growth cycle. Three critical processes must happen for efficient pigmentation: (1) melanosome biogenesis in neural crest-derived melanocytes, (2) the biochemical synthesis of melanins (melanogenesis) inside melanosomes, and (3) the transfer of melanin granules to surrounding pre-cortical keratinocytes for their incorporation into nascent hair fibres. All these steps are under complex genetic control. The array of natural hair colour shades are ascribed to polymorphisms in several pigmentary genes. A myriad of factors acting via autocrine, paracrine, and endocrine mechanisms also contributes for hair colour diversity. Given the enormous social and cosmetic importance attributed to hair colour, hair dyeing is today a common practice. Nonetheless, the adverse effects of the long-term usage of such cosmetic procedures demand the development of new methods for colour change. In this context, case reports of hair lightening, darkening and repigmentation as a side-effect of the therapeutic usage of many drugs substantiate the possibility to tune hair colour by interfering with the biology of follicular pigmentary units. By scrutinizing mammalian pigmentation, this review pinpoints key targetable processes for the development of innovative cosmetics that can safely change the hair colour from the inside out.
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Affiliation(s)
- Bruno Fernandes
- CEB—Centre of Biological Engineering, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Artur Cavaco-Paulo
- CEB—Centre of Biological Engineering, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
- Correspondence: (A.C.-P.); (T.M.); Tel.: +351-253-604-409 (A.C.-P.); +351-253-601-599 (T.M.)
| | - Teresa Matamá
- CEB—Centre of Biological Engineering, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
- Correspondence: (A.C.-P.); (T.M.); Tel.: +351-253-604-409 (A.C.-P.); +351-253-601-599 (T.M.)
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Kim HM, Oh S, Choi CH, Yang JY, Kim S, Kang D, Son KH, Byun K. Attenuation Effect of Radiofrequency Irradiation on UV-B-Induced Skin Pigmentation by Decreasing Melanin Synthesis and through Upregulation of Heat Shock Protein 70. Molecules 2021; 26:molecules26247648. [PMID: 34946730 PMCID: PMC8708156 DOI: 10.3390/molecules26247648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 12/12/2021] [Accepted: 12/14/2021] [Indexed: 11/17/2022] Open
Abstract
Excess melanin deposition in the skin causes cosmetic problems. HSP70 upregulation decreases microphthalmia-associated transcription factor (MITF) expression, which eventually decreases tyrosinase activity and melanogenesis. Ultraviolet (UV) radiation upregulates p53, which increases the melanocortin receptor (MC1R) and MITF. Furthermore, HSP70 decreases p53 and radiofrequency irradiation (RF) increases HSP70. We evaluated whether RF increased HSP70 and decreased p53, consequently decreasing the MITF/tyrosinase pathway and melanogenesis in UV-B radiated animal skin. Various RF combinations with 50, 100, and 150 ms and 5, 10, and 15 W were performed on the UV-B radiated mouse skin every 2 d for 28 d. When RF was performed with 100 ms/10 W, melanin deposition, evaluated by Fontana–Masson staining, decreased without skin crust formation in the UV-B radiated skin. Thus, we evaluated the effect of RF on decreasing melanogenesis in the HEMn and UV-B radiated skin at a setting of 100 ms/10 W. HSP70 expression was decreased in the UV-B radiated skin but was increased by RF. The expression of p53, MC1R, and MITF increased in the UV-B radiated skin but was decreased by RF. The expression of p53, MC1R, and MITF increased in the α-MSH treated HEMn but was decreased by RF. The decreasing effects of RF on p53, MC1R, CREB and MITF were higher than those of HSP70-overexpressed HEMn. The decreasing effect of RF on p53, MC1R, CREB, and MITF disappeared in the HSP70-silenced HEMn. MC1R, CREB, and MITF were not significantly decreased by the p53 inhibitor in α-MSH treated HEMn. RF induced a greater decrease in MC1R, CREB, and MITF than the p53 inhibitor. Therefore, RF may have decreased melanin synthesis by increasing HSP70 and decreasing p53, thus decreasing MC1R/CREB/MITF and tyrosinase activity.
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Affiliation(s)
- Hyoung Moon Kim
- Department of Anatomy & Cell Biology, Gachon University College of Medicine, Incheon 21936, Korea;
- Functional Cellular Networks Laboratory, Department of Medicine, Graduate School and Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon 21999, Korea; (S.O.); (J.Y.Y.)
| | - Seyeon Oh
- Functional Cellular Networks Laboratory, Department of Medicine, Graduate School and Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon 21999, Korea; (S.O.); (J.Y.Y.)
| | - Chang Hu Choi
- Department of Thoracic and Cardiovascular Surgery, Gachon University Gil Medical Center, Gachon University, Incheon 21565, Korea;
| | - Jin Young Yang
- Functional Cellular Networks Laboratory, Department of Medicine, Graduate School and Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon 21999, Korea; (S.O.); (J.Y.Y.)
| | - Sunggeun Kim
- Jeisys Medical Inc., Seoul 08501, Korea; (S.K.); (D.K.)
| | - Donghwan Kang
- Jeisys Medical Inc., Seoul 08501, Korea; (S.K.); (D.K.)
| | - Kuk Hui Son
- Department of Thoracic and Cardiovascular Surgery, Gachon University Gil Medical Center, Gachon University, Incheon 21565, Korea;
- Correspondence: (K.H.S.); (K.B.)
| | - Kyunghee Byun
- Department of Anatomy & Cell Biology, Gachon University College of Medicine, Incheon 21936, Korea;
- Functional Cellular Networks Laboratory, Department of Medicine, Graduate School and Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon 21999, Korea; (S.O.); (J.Y.Y.)
- Correspondence: (K.H.S.); (K.B.)
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Hwang H, Chun H, Kim D, Shin M, Kim YS, In S, Kim T, Kang NG. Lysophosphatidylcholine exerts an anti-skin photoaging effect via heat shock protein 70 induction. J Cosmet Dermatol 2021; 20:4060-4067. [PMID: 33714221 DOI: 10.1111/jocd.14068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 03/05/2021] [Indexed: 01/10/2023]
Abstract
OBJECTIVE Skin-brightening agents prevent melanogenesis and reduce melanin production. However, a lower melanin content leads to weaker protection against sunlight. In this study, we evaluated the effect of lysophosphatidylcholine (LPC) and its commercial-grade product, Lysofix Dry™ (LD), on heat shock protein 70 (HSP70) expression in epidermal cells and their anti-skin photoaging effect against ultraviolet B (UVB) and blue light. METHODS The HSP70 induction was detected using ELISA. To confirm the inhibition of melanin synthesis by LPC or LD, the melanin content assay and gene expression were analyzed. Cell viability was assessed to verify whether LPC or LD prevents photo-induced skin damage. The split-face test was performed to confirm skin-brightening effect of LD. Cream formulation with 2% of LD and placebo were used for 8 weeks, and skin brightness (L) was measured with chromameter (CR-400, Konica Minolta). RESULTS LPC- and LD-induced HSP70 expression in epidermal cells. LPC and LD effectively suppressed melanogenesis provoked by α-MSH in B16 cells. They also inhibited the mRNA transcription of MITF and tyrosinase under blue light irradiation. LD increased the viability of B16 and HaCaT cells after UVB and blue light irradiation in vitro. The cream containing 2% LD increased ΔL by 1.7 after 8 weeks of use, whereas the placebo led to an increase of 0.7. CONCLUSION LPC and LD were effective in suppressing melanogenesis and enhancing cell viability under UVB and blue light via HSP70 expression. Thus, they can be considered as potent skin-brightening agents with protective effects against skin photoaging.
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Affiliation(s)
- Hyunmin Hwang
- LG Science Park, LG Household & Health Care Ltd., Seoul, Korea
| | - Hyeyeon Chun
- LG Science Park, LG Household & Health Care Ltd., Seoul, Korea
| | - Daehyun Kim
- LG Science Park, LG Household & Health Care Ltd., Seoul, Korea
| | - Munju Shin
- LG Science Park, LG Household & Health Care Ltd., Seoul, Korea
| | - Yun-Sun Kim
- LG Household & Health Care R&D Campus, Daejeon, Korea
| | - Sohyun In
- LG Science Park, LG Household & Health Care Ltd., Seoul, Korea
| | - Taeyoon Kim
- LG Science Park, LG Household & Health Care Ltd., Seoul, Korea
| | - Nae-Gyu Kang
- LG Science Park, LG Household & Health Care Ltd., Seoul, Korea
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Schweizer M, Triebskorn R, Köhler H. Snails in the sun: Strategies of terrestrial gastropods to cope with hot and dry conditions. Ecol Evol 2019; 9:12940-12960. [PMID: 31788227 PMCID: PMC6875674 DOI: 10.1002/ece3.5607] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/15/2019] [Accepted: 08/05/2019] [Indexed: 11/08/2022] Open
Abstract
Terrestrial gastropods do not only inhabit humid and cool environments but also habitat in which hot and dry conditions prevail. Snail species that are able to cope with such climatic conditions are thus expected to having developed multifaceted strategies and mechanisms to ensure their survival and reproduction under heat and desiccation stress. This review paper aims to provide an integrative overview of the numerous adaptation strategies terrestrial snails have evolved to persist in hot and dry environments as well as their mutual interconnections and feedbacks, but also to outline research gaps and questions that remained unanswered. We extracted relevant information from more than 140 publications in order to show how biochemical, cellular, physiological, morphological, ecological, thermodynamic, and evolutionary parameters contribute to provide an overall picture of this classical example in stress ecology. These mechanisms range from behavioral and metabolic adaptations, including estivation, to the induction of chaperones and antioxidant enzymes, mucocyte and digestive gland cell responses and the modification and frequency of morphological features, particularly shell pigmentation. In this context, thermodynamic constraints call for processes of complex adaptation at varying levels of biological organization that are mutually interwoven. We were able to assemble extensive, mostly narrowly focused information from the literature into a web of network parameters, showing that future work on this subject requires multicausal thinking to account for the complexity of relationships involved in snails' adaptation to insolation, heat, and drought.
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Affiliation(s)
- Mona Schweizer
- Animal Physiological EcologyInstitute of Evolution and EcologyUniversity of TübingenTübingenGermany
| | - Rita Triebskorn
- Animal Physiological EcologyInstitute of Evolution and EcologyUniversity of TübingenTübingenGermany
- Steinbeis Transfer Center for Ecotoxicology and EcophysiologyRottenburgGermany
| | - Heinz‐R. Köhler
- Animal Physiological EcologyInstitute of Evolution and EcologyUniversity of TübingenTübingenGermany
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Satou G, Maji D, Isamoto T, Oike Y, Endo M. UV-B-activated B16 melanoma cells or HaCaT keratinocytes accelerate signaling pathways associated with melanogenesis via ANGPTL 2 induction, an activity antagonized by Chrysanthemum extract. Exp Dermatol 2019; 28:152-160. [PMID: 30554436 PMCID: PMC6850386 DOI: 10.1111/exd.13862] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 12/04/2018] [Accepted: 12/07/2018] [Indexed: 01/30/2023]
Abstract
Sunburn causes inflammation, which increases melanin production in skin and causes hyperpigmentation. Angiopoietin-like protein (ANGPTL) 2 is an inflammatory mediator induced in sun-exposed skin areas. However, whether ANGPTL2 functions in melanin production remains unclear. To assess this possibility, we overexpressed Angptl2 in the melanoma line B16 and in the keratinocyte line HaCaT. Relative to controls, Angptl2-expressing B16 cells produced higher melanin levels via tyrosinase induction. Accordingly, Angptl2-expressing HaCaT cells secreted relatively high levels of both endothelin-1 (ET-1) and α-melanocyte-stimulating hormone (α-MSH). Moreover, treatment with an extract from Chrysanthemum indicum × Erigeron annuus (CE) suppressed ANGPTL2 expression and repressed tyrosinase induction in melanocytes and of α-MSH and ET-1 in keratinocytes. Our data suggest that ANGPTL2 expression in keratinocytes and melanin-producing cells accelerates pigment production and that treatment of skin with a CE extract could prevent melanin accumulation.
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Affiliation(s)
- Gaku Satou
- Saishunkan Pharmaceutical Co. LtdKumamotoJapan
| | | | | | - Yuichi Oike
- Department of Molecular GeneticsGraduate School of Medical SciencesKumamoto UniversityKumamotoJapan
| | - Motoyoshi Endo
- Department of Molecular GeneticsGraduate School of Medical SciencesKumamoto UniversityKumamotoJapan
- Department of Molecular BiologyUniversity of Occupational and Environmental Health, JapanFukuokaJapan
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Singh N, Shreshtha AK, Thakur M, Patra S. Xanthine scaffold: scope and potential in drug development. Heliyon 2018; 4:e00829. [PMID: 30302410 PMCID: PMC6174542 DOI: 10.1016/j.heliyon.2018.e00829] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/25/2018] [Accepted: 09/25/2018] [Indexed: 02/07/2023] Open
Abstract
Medicinal plants have been the basis for discovery of various important marketed drugs. Xanthine is one such lead molecule. Xanthines in various forms (caffeine, theophylline, theobromine, etc) are abode in tea, coffee, cocoa, chocolate etc. giving them popular recognition. These compounds are best known for their diverse pharmaceutical applications as cyclic nucleotide phosphodiesterase inhibition, antagonization of adenosine receptor, anti-inflammatory, anti-microbial, anti-oxidant and anti-tumor activities. These properties incentivize to use xanthine as scaffold to develop new derivatives. Chemical synthesis contributes greater diversity in xanthine based derivatisation. With highlighting the existing challenges in chemical synthesis, the present review focuses the probable solution to fill existing lacuna. The review summarizes the available knowledge of xanthine based drugs development along with exploring new xanthine led chemical synthesis path for bringing diversification in xanthine based research. The main objective of this review is to explore the immense potential of xanthine as scaffold in drug development.
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Affiliation(s)
- Nivedita Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | | | - M.S. Thakur
- Fermentation Technology and Bioengineering Department, Central Food Technological Research Institute, Mysore, India
| | - Sanjukta Patra
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
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Pillaiyar T, Manickam M, Jung SH. Recent development of signaling pathways inhibitors of melanogenesis. Cell Signal 2017; 40:99-115. [PMID: 28911859 DOI: 10.1016/j.cellsig.2017.09.004] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 09/10/2017] [Accepted: 09/10/2017] [Indexed: 02/08/2023]
Abstract
Human skin, eye and hair color rely on the production of melanin, depending on its quantity, quality, and distribution, Melanin plays a monumental role in protecting the skin against the harmful effect of ultraviolet radiation and oxidative stress from various environmental pollutants. However, an excessive production of melanin causes serious dermatological problems such as freckles, solar lentigo (age spots), melasma, as well as cancer. Hence, the regulation of melanin production is important for controlling the hyper-pigmentation. Melanogenesis, a biosynthetic pathway to produce melanin pigment in melanocyte, involves a series of intricate enzymatic and chemical catalyzed reactions. Several extrinsic factors include ultraviolet radiation and chemical drugs, and intrinsic factors include molecules secreted by surrounding keratinocytes or melanocytes, and fibroblasts, all of which regulate melanogenesis. This article reviews recent advances in the development of melanogenesis inhibitors that directly/indirectly target melanogenesis-related signaling pathways. Efforts have been made to provide a description of the mechanism of action of inhibitors on various melanogenesis signaling pathways.
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Affiliation(s)
- Thanigaimalai Pillaiyar
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany.
| | - Manoj Manickam
- College of Pharmacy and Institute of Drug Research and Development, Chungnam National, University, Daejeon 34134, Republic of Korea
| | - Sang-Hun Jung
- College of Pharmacy and Institute of Drug Research and Development, Chungnam National, University, Daejeon 34134, Republic of Korea
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Murase D, Hachiya A, Fullenkamp R, Beck A, Moriwaki S, Hase T, Takema Y, Manga P. Variation in Hsp70-1A Expression Contributes to Skin Color Diversity. J Invest Dermatol 2016; 136:1681-1691. [PMID: 27094592 DOI: 10.1016/j.jid.2016.03.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 03/28/2016] [Accepted: 03/30/2016] [Indexed: 01/09/2023]
Abstract
The wide range in human skin color results from varying levels of the pigment melanin. Genetic mechanisms underlying coloration differences have been explored, but identified genes do not account for all variation seen in the skin color spectrum. Post-transcriptional and post-translational regulation of factors that determine skin color, including melanin synthesis in epidermal melanocytes, melanosome transfer to keratinocytes, and melanosome degradation, is also critical for pigmentation. We therefore investigated proteins that are differentially expressed in melanocytes derived from either white or African American skin. Two-dimensional gel electrophoresis and mass spectrometry demonstrated that heat shock protein 70-1A (Hsp70-1A) protein levels were significantly higher in African American melanocytes compared with white melanocytes. Hsp70-1A expression significantly correlated with levels of tyrosinase, the rate-limiting melanogenic enzyme, consistent with a proposed role for Hsp70 family members in tyrosinase post-translational modification. In addition, pharmacologic inhibition and small interfering RNA-mediated downregulation of Hsp70-1A correlated with pigmentation changes in cultured melanocytes, modified human skin substitutes, and ex vivo skin. Furthermore, Hsp70-1A inhibition led to increased autophagy-mediated melanosome degradation in keratinocytes. Our data thus reveal that epidermal Hsp70-1A contributes to the diversity of skin color by regulating the amount of melanin synthesized in melanocytes and modulating autophagic melanosome degradation in keratinocytes.
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Affiliation(s)
- Daiki Murase
- Biological Science Americas Laboratory, Kao USA Inc., Cincinnati, Ohio, USA; Biological Science Laboratories, Kao Corporation, Haga-gun, Tochigi, Japan
| | - Akira Hachiya
- Biological Science Laboratories, Kao Corporation, Haga-gun, Tochigi, Japan.
| | - Rachel Fullenkamp
- Biological Science Americas Laboratory, Kao USA Inc., Cincinnati, Ohio, USA
| | - Anita Beck
- Biological Science Americas Laboratory, Kao USA Inc., Cincinnati, Ohio, USA
| | - Shigeru Moriwaki
- Biological Science Laboratories, Kao Corporation, Haga-gun, Tochigi, Japan
| | - Tadashi Hase
- Biological Science Laboratories, Kao Corporation, Haga-gun, Tochigi, Japan
| | - Yoshinori Takema
- Research and Development Global, Kao Corporation, Sumida-ku, Tokyo, Japan
| | - Prashiela Manga
- The Ronald O. Perelman Department of Dermatology, New York University School of Medicine, New York, New York, USA
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The Effect of Electroporation of a Lyotroic Liquid Crystal Genistein-Based Formulation in the Recovery of Murine Melanoma Lesions. Int J Mol Sci 2015; 16:15425-41. [PMID: 26184156 PMCID: PMC4519906 DOI: 10.3390/ijms160715425] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 06/11/2015] [Accepted: 06/25/2015] [Indexed: 12/15/2022] Open
Abstract
A lamellar lyotropic liquid crystal genistein-based formulation (LLC-Gen) was prepared in order to increase the aqueous solubility of the lipophilic phytocompound genistein. The formulation was applied locally, in a murine model of melanoma, with or without electroporation. The results demonstrated that, when the formulation was applied by electroporation, the tumors appeared later. During the 21 days of the experiment, the LLC-Gen formulation decreased the tumor volume, the amount of melanin and the degree of erythema, but when electroporation was applied, all these parameters indicated a better prognosis even (lower tumor volume, amount of melanin and degree of erythema). Although hematoxylin-eosin (HE) staining confirmed the above events, application of the LLC-Gen formulation by electroporation did not lead to a significant effect in terms of the serum concentrations of the protein S100B and serum neuron specific enolase (NSE), or the tissue expression of the platelet-derived growth factor receptor β (PDGFRβ) antibody.
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Identification of HSP70-inducing activity in Arnica montana extract and purification and characterization of HSP70-inducers. J Dermatol Sci 2015; 78:67-75. [DOI: 10.1016/j.jdermsci.2015.01.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 01/16/2015] [Accepted: 01/24/2015] [Indexed: 12/19/2022]
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13
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Li W, Zhang S, Smith C. The molecular structure features-immune stimulatory activity of arabinoxylans derived from the pentosan faction of wheat flour. J Cereal Sci 2015. [DOI: 10.1016/j.jcs.2014.12.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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14
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Danciu C, Oprean C, Coricovac DE, Andreea C, Cimpean A, Radeke H, Soica C, Dehelean C. Behaviour of four different B16 murine melanoma cell sublines: C57BL/6J skin. Int J Exp Pathol 2015; 96:73-80. [PMID: 25664478 DOI: 10.1111/iep.12114] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 12/01/2014] [Indexed: 12/24/2022] Open
Abstract
Transplantable murine melanomas are well-established models for the study of experimental cancer therapies. The aim of this study was to explore the behaviour of four different B16 murine melanoma cell sublines after inoculation into C57BL/6J mice; and, more specifically to analyse skin changes, with respect to two specific parameters: clinical (tumour volume, melanin amount, erythema) and histological (H & E, S100, VEGF expression). Both non-invasive and invasive analysis showed that B164A5 is the most aggressive melanoma cell line for C57BL/6J's skin, followed by B16F10 and then by diminished aggressive growth pattern by the B16GMCSF and B16FLT3 cell lines.
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Affiliation(s)
- Corina Danciu
- Department of Pharmacognosy, University of Medicine and Pharmacy 'Victor Babes', Timisoara, Romania
| | - Camelia Oprean
- Department of Pharmaceutical Chemistry, University of Medicine and Pharmacy 'Victor Babes', Timisoara, Romania
| | - Dorina E Coricovac
- Department of Toxicology, University of Medicine and Pharmacy 'Victor Babes', Timisoara, Romania
| | - Cioca Andreea
- Department of Pathology, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Anca Cimpean
- Department of Microscopic Morphology/Histology, Angiogenesis Research Center, University of Medicine and Pharmacy 'Victor Babes', Timisoara, Romania
| | - Heinfried Radeke
- Pharmazentrum Frankfurt/Center for Drug Research, Development, and Safety, Clinic of J. W. Goethe University, Frankfurt, Germany
| | - Codruta Soica
- Department of Pharmaceutical Chemistry, University of Medicine and Pharmacy 'Victor Babes', Timisoara, Romania
| | - Cristina Dehelean
- Department of Toxicology, University of Medicine and Pharmacy 'Victor Babes', Timisoara, Romania
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15
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Di Lellis MA, Sereda S, Geißler A, Picot A, Arnold P, Lang S, Troschinski S, Dieterich A, Hauffe T, Capowiez Y, Mazzia C, Knigge T, Monsinjon T, Krais S, Wilke T, Triebskorn R, Köhler HR. Phenotypic diversity, population structure and stress protein-based capacitoring in populations of Xeropicta derbentina, a heat-tolerant land snail species. Cell Stress Chaperones 2014; 19:791-800. [PMID: 24609822 PMCID: PMC4389839 DOI: 10.1007/s12192-014-0503-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 02/03/2014] [Accepted: 02/04/2014] [Indexed: 11/27/2022] Open
Abstract
The shell colour of many pulmonate land snail species is highly diverse. Besides a genetic basis, environmentally triggered epigenetic mechanisms including stress proteins as evolutionary capacitors are thought to influence such phenotypic diversity. In this study, we investigated the relationship of stress protein (Hsp70) levels with temperature stress tolerance, population structure and phenotypic diversity within and among different populations of a xerophilic Mediterranean snail species (Xeropicta derbentina). Hsp70 levels varied considerably among populations, and were significantly associated with shell colour diversity: individuals in populations exhibiting low diversity expressed higher Hsp70 levels both constitutively and under heat stress than those of phenotypically diverse populations. In contrast, population structure (cytochrome c oxidase subunit I gene) did not correlate with phenotypic diversity. However, genetic parameters (both within and among population differences) were able to explain variation in Hsp70 induction at elevated but non-pathologic temperatures. Our observation that (1) population structure had a high explanatory potential for Hsp70 induction and that (2) Hsp70 levels, in turn, correlated with phenotypic diversity while (3) population structure and phenotypic diversity failed to correlate provides empirical evidence for Hsp70 to act as a mediator between genotypic variation and phenotype and thus for chaperone-driven evolutionary capacitance in natural populations.
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Affiliation(s)
- Maddalena A. Di Lellis
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
| | - Sergej Sereda
- />Department of Animal Ecology & Systematics, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32 IFZ, D-35392 Giessen, Germany
| | - Anna Geißler
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
| | - Adrien Picot
- />Laboratory of Ecotoxicology (LEMA), EA 3222 PRES Normandie, Le Havre University, 25 Rue Philippe Lebon, F-76058 Le Havre Cedex, France
| | - Petra Arnold
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
| | - Stefanie Lang
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
| | - Sandra Troschinski
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
| | - Andreas Dieterich
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
| | - Torsten Hauffe
- />Department of Animal Ecology & Systematics, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32 IFZ, D-35392 Giessen, Germany
| | - Yvan Capowiez
- />Université d’Avignon et des Pays de Vaucluse, Laboratoire de Toxicologie Environnementale, UMR 406 UAPV/INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon Cedex 9, France
| | - Christophe Mazzia
- />IMBE UMR 7263, Institut Mediterranéen de Biodiversité et d’Ecologie marine et continentale, Université d’Avignon et des Pays de Vaucluse, Pole Agrosciences, 301 rue Baruch de Spinoza, BP 21239, F-84916 Avignon cedex 9, France
| | - Thomas Knigge
- />Laboratory of Ecotoxicology (LEMA), EA 3222 PRES Normandie, Le Havre University, 25 Rue Philippe Lebon, F-76058 Le Havre Cedex, France
| | - Tiphaine Monsinjon
- />Laboratory of Ecotoxicology (LEMA), EA 3222 PRES Normandie, Le Havre University, 25 Rue Philippe Lebon, F-76058 Le Havre Cedex, France
| | - Stefanie Krais
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
| | - Thomas Wilke
- />Department of Animal Ecology & Systematics, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32 IFZ, D-35392 Giessen, Germany
| | - Rita Triebskorn
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
- />Steinbeis-Transfer Center Ecotoxicology and Ecophysiology Rottenburg, Blumenstr. 13, D-72108 Rottenburg, Germany
| | - Heinz-R. Köhler
- />Animal Physiological Ecology, Institute of Evolution and Ecology, Tübingen University, Konrad-Adenauer-Str. 20, D-72072 Tübingen, Germany
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16
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Roy A, Sahu RK, Matlam M, Deshmukh VK, Dwivedi J, Jha AK. In vitro techniques to assess the proficiency of skin care cosmetic formulations. Pharmacogn Rev 2014; 7:97-106. [PMID: 24347917 PMCID: PMC3842001 DOI: 10.4103/0973-7847.120507] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 03/07/2013] [Accepted: 10/25/2013] [Indexed: 12/25/2022] Open
Abstract
Cosmetics comprising either natural or synthetic components are used almost regularly and universally in different forms to enhance the beauty. The utmost disclosure of human membrane to sunlight and environmental pollution results in the exhibition of free radical, that react with deoxyribonucleic acid, proteins and fatty acids, causation oxidative destruction dysfunction of the antioxidant system. In skin, the formation of reactive oxygen species leads to skin diseases, predominantly cutaneous malignancies, immunosuppression, wrinkles, aging, etc., The human organism fosters a barrier practice against the destructive action of free radicals, comprising mostly of vitamins, carotenoids and enzymes. Cosmetic products are the best option to reduce skin disorders such as hyper pigmentation, skin aging, skin wrinkling and rough skin texture, etc., Hence in this review, we conferred various in vitro methods that are used for the development of novel cosmetic formulation. There is an expanding fascinate employing in vitro techniques because they are less time consuming, more cost-effective and lessen the participation of human volunteers.
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Affiliation(s)
- Amit Roy
- Department of Pharmaceutical Sciences, Columbia Institute of Pharmacy, Tekari, Raipur, Chhattisgarh, India
| | - Ram Kumar Sahu
- Department of Pharmaceutical Sciences, Columbia Institute of Pharmacy, Tekari, Raipur, Chhattisgarh, India
| | - Munglu Matlam
- Department of Pharmaceutical Sciences, Columbia Institute of Pharmacy, Tekari, Raipur, Chhattisgarh, India
| | - Vinay Kumar Deshmukh
- Department of Pharmaceutical Sciences, Columbia Institute of Pharmacy, Tekari, Raipur, Chhattisgarh, India
| | - Jaya Dwivedi
- Department of Pharmaceutical Chemistry, Banasthali University, P.O. Banasthali Vidyapith, Rajasthan, India
| | - Arvind Kumar Jha
- Department of Pharmaceutical Sciences, Shri Shankaracharya Institute of Pharmaceutical Science, Bhilai, Chhattisgarh, India
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17
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Betulinic acid in complex with a gamma-cyclodextrin derivative decreases proliferation and in vivo tumor development of non-metastatic and metastatic B164A5 cells. Int J Mol Sci 2014; 15:8235-55. [PMID: 24821543 PMCID: PMC4057729 DOI: 10.3390/ijms15058235] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 04/08/2014] [Accepted: 04/10/2014] [Indexed: 02/06/2023] Open
Abstract
Betulinic acid, a very promising anti-melanoma agent, has very low water solubility that causes low bioavailability. To overcome this inconvenience, a highly water-soluble cyclodextrin was used (octakis-[6-deoxy-6-(2-sulfanyl ethanesulfonic acid)]-γ-cyclodextrin). The complex was physico-chemically analyzed using differential scanning calorimetry (DSC), X-ray and scanning electron microscopy (SEM) methods and then in vitro tested for its antiproliferative activity by the MTT assay and by cell cycle analysis. Finally, the complex was tested in vivo using an animal model of murine melanoma developed in C57BL/6J mice, where it caused a reduction in tumor volume and weight. The study revealed the beneficial influence of betulinic acid inclusion into the cyclodextrin in terms of antiproliferative activity and in vivo tumor development.
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18
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Peng LH, Xu SY, Shan YH, Wei W, Liu S, Zhang CZ, Wu JH, Liang WQ, Gao JQ. Sequential release of salidroside and paeonol from a nanosphere-hydrogel system inhibits ultraviolet B-induced melanogenesis in guinea pig skin. Int J Nanomedicine 2014; 9:1897-908. [PMID: 24790432 PMCID: PMC3998849 DOI: 10.2147/ijn.s59290] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Melanin is the one of most important pigments for skin color in mammals. Excessive biosynthesis of melanin induces various pigment disorders. Much effort has been made to develop regulators to minimize skin pigmentation abnormalities. However, only a few of them are used, primarily because of safety concerns and low efficiency. In this study, we aimed to construct a novel nanosphere-gel for sequential delivery of salidroside and paeonol, to investigate the synergistic effects of these drugs in anti-melanogenesis, and to decrease their potential for toxicity in high dosage. Nanospheres were prepared and characterized for their particle size, polydispersity index, zeta potential, and morphological properties. The optimized nanospheres were incorporated in carbomer hydrogel with both paeonol and salidroside entrapped to form a dual drug-releasing nanosphere-gel. With this nanosphere-gel, rapid release of salidroside from the hydrogel followed by sustained release of paeonol from the nanosphere was achieved. Using a classical model of the melanogenesis response to ultraviolet exposure, it was shown that the anti-melanogenesis effects of the dual drug-releasing system, in which the doses of the individual drugs were decreased by half, was obviously enhanced when compared with the effects of the single drug preparations. Mechanistically, the burst release of salidroside from the hydrogel may enable prompt suppression of melanocyte proliferation on exposure to ultraviolet B radiation, while the paeonol released in a sustained manner can provide continuous inhibition of tyrosinase activity in melanocytes. Combined delivery of salidroside and paeonol was demonstrated to be a promising strategy for enhancing the therapeutic efficacy of these agents in anti-melanogenesis and reducing their toxicity, so may have great potential in nanomedicine.
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Affiliation(s)
- Li-Hua Peng
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
| | - Shen-Yao Xu
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
| | - Ying-Hui Shan
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
| | - Wei Wei
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
| | - Shuai Liu
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
| | - Chen-Zhen Zhang
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
| | - Jia-He Wu
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
| | - Wen-Quan Liang
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
| | - Jian-Qing Gao
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People’s Republic of China
- Novel Transdermal Research Center of Jiangsu Province, Changzhou, People’s Republic of China
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19
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Hirasawa Y, Kato Y, Wong CP, Uchiyama N, Goda Y, Hadi AHA, Ali HM, Morita H. Hupermine A, a novel C16N2-type Lycopodium alkaloid from Huperzia phlegmaria. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.01.141] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Martinez-Levasseur LM, Birch-Machin MA, Bowman A, Gendron D, Weatherhead E, Knell RJ, Acevedo-Whitehouse K. Whales use distinct strategies to counteract solar ultraviolet radiation. Sci Rep 2014; 3:2386. [PMID: 23989080 PMCID: PMC3757271 DOI: 10.1038/srep02386] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 07/23/2013] [Indexed: 12/24/2022] Open
Abstract
A current threat to the marine ecosystem is the high level of solar ultraviolet radiation (UV). Large whales have recently been shown to suffer sun-induced skin damage from continuous UV exposure. Genotoxic consequences of such exposure remain unknown for these long-lived marine species, as does their capacity to counteract UV-induced insults. We show that UV exposure induces mitochondrial DNA damage in the skin of seasonally sympatric fin, sperm, and blue whales and that this damage accumulates with age. However, counteractive molecular mechanisms are markedly different between species. For example, sperm whales, a species that remains for long periods at the sea surface, activate genotoxic stress pathways in response to UV exposure whereas the paler blue whale relies on increased pigmentation as the season progresses. Our study also shows that whales can modulate their responses to fluctuating levels of UV, and that different evolutionary constraints may have shaped their response strategies.
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21
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Four new Amaryllidaceae alkaloids from Zephyranthes candida. J Nat Med 2014; 68:610-4. [DOI: 10.1007/s11418-014-0819-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 01/17/2014] [Indexed: 10/25/2022]
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Hoshino T, Suzuki K, Matsushima T, Yamakawa N, Suzuki T, Mizushima T. Suppression of Alzheimer's disease-related phenotypes by geranylgeranylacetone in mice. PLoS One 2013; 8:e76306. [PMID: 24098472 PMCID: PMC3788141 DOI: 10.1371/journal.pone.0076306] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 08/23/2013] [Indexed: 01/11/2023] Open
Abstract
Amyloid-β peptide (Aβ) plays an important role in the pathogenesis of Alzheimer’s disease (AD). Aβ is generated by the secretase-mediated proteolysis of β-amyloid precursor protein (APP), and cleared by enzyme-mediated degradation and phagocytosis. Transforming growth factor (TGF)-β1 stimulates this phagocytosis. We recently reported that the APP23 mouse model for AD showed fewer AD-related phenotypes when these animals were crossed with transgenic mice expressing heat shock protein (HSP) 70. We here examined the effect of geranylgeranylacetone, an inducer of HSP70 expression, on the AD-related phenotypes. Repeated oral administration of geranylgeranylacetone to APP23 mice for 9 months not only improved cognitive function but also decreased levels of Aβ, Aβ plaque deposition and synaptic loss. The treatment also up-regulated the expression of an Aβ-degrading enzyme and TGF-β1 but did not affect the maturation of APP and secretase activities. These outcomes were similar to those observed in APP23 mice genetically modified to overexpress HSP70. Although the repeated oral administration of geranylgeranylacetone did not increase the level of HSP70 in the brain, a single oral administration of geranylgeranylacetone significantly increased the level of HSP70 when Aβ was concomitantly injected directly into the hippocampus. Since geranylgeranylacetone has already been approved for use as an anti-ulcer drug and its safety in humans has been confirmed, we propose that this drug be considered as a candidate drug for the prevention of AD.
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Affiliation(s)
- Tatsuya Hoshino
- Faculty of Pharmacy, Keio University, Minato-ku, Tokyo, Japan
| | - Koichiro Suzuki
- Faculty of Pharmacy, Keio University, Minato-ku, Tokyo, Japan
| | - Takahide Matsushima
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Naoki Yamakawa
- Faculty of Pharmacy, Keio University, Minato-ku, Tokyo, Japan
| | - Toshiharu Suzuki
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tohru Mizushima
- Faculty of Pharmacy, Keio University, Minato-ku, Tokyo, Japan
- * E-mail:
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Strozyk E, Kulms D. The role of AKT/mTOR pathway in stress response to UV-irradiation: implication in skin carcinogenesis by regulation of apoptosis, autophagy and senescence. Int J Mol Sci 2013; 14:15260-85. [PMID: 23887651 PMCID: PMC3759859 DOI: 10.3390/ijms140815260] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 06/27/2013] [Accepted: 07/01/2013] [Indexed: 02/06/2023] Open
Abstract
Induction of DNA damage by UVB and UVA radiation may generate mutations and genomic instability leading to carcinogenesis. Therefore, skin cells being repeatedly exposed to ultraviolet (UV) light have acquired multilayered protective mechanisms to avoid malignant transformation. Besides extensive DNA repair mechanisms, the damaged skin cells can be eliminated by induction of apoptosis, which is mediated through the action of tumor suppressor p53. In order to prevent the excessive loss of skin cells and to maintain the skin barrier function, apoptotic pathways are counteracted by anti-apoptotic signaling including the AKT/mTOR pathway. However, AKT/mTOR not only prevents cell death, but is also active in cell cycle transition and hyper-proliferation, thereby also counteracting p53. In turn, AKT/mTOR is tuned down by the negative regulators being controlled by the p53. This inhibition of AKT/mTOR, in combination with transactivation of damage-regulated autophagy modulators, guides the p53-mediated elimination of damaged cellular components by autophagic clearance. Alternatively, p53 irreversibly blocks cell cycle progression to prevent AKT/mTOR-driven proliferation, thereby inducing premature senescence. Conclusively, AKT/mTOR via an extensive cross talk with p53 influences the UV response in the skin with no black and white scenario deciding over death or survival.
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Affiliation(s)
- Elwira Strozyk
- Experimental Dermatology, Department of Dermatology, TU Dresden, 01307 Dresden, Germany; E-Mail:
| | - Dagmar Kulms
- Experimental Dermatology, Department of Dermatology, TU Dresden, 01307 Dresden, Germany; E-Mail:
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24
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Mosenson JA, Eby JM, Hernandez C, Le Poole IC. A central role for inducible heat-shock protein 70 in autoimmune vitiligo. Exp Dermatol 2013; 22:566-9. [PMID: 23786523 DOI: 10.1111/exd.12183] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2013] [Indexed: 12/14/2022]
Abstract
Inducible heat-shock protein 70 (HSP70i) is a protein regulated by stress that protects cells from undergoing apoptosis. Such proteins are marvellously well conserved throughout evolution, which has placed them in the spotlight for helping to understand the intriguing relationship between infection and immunity. In the presence of stress proteins, dendritic cells (DCs) will sense this alarm signal and respond by recruiting immune cells of different plumage to fit the occasion. In times of stress, melanocytes will secrete antigen-bound HSP70i to act as an alarm signal in activating DCs that comes equipped with an address of origin to drive the autoimmune response in vitiligo. Here we pose that if the autoimmune response is funnelled through HSP70i, then blocking the stress protein from activating DCs can lend new treatment opportunities for vitiligo.
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Affiliation(s)
- Jeffrey A Mosenson
- Department of Pathology, Cardinal Bernardin Cancer Center, Loyola University Chicago, Maywood, IL, USA
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Geranylgeranylacetone inhibits melanin synthesis via ERK activation in Mel-Ab cells. Life Sci 2013; 93:226-32. [PMID: 23792203 DOI: 10.1016/j.lfs.2013.06.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 05/18/2013] [Accepted: 06/10/2013] [Indexed: 12/21/2022]
Abstract
AIMS Geranylgeranylacetone (GGA) has shown cytoprotective activity through induction of a 70-kDa heat shock protein (HSP70). Although HSP70 is reported to regulate melanogenesis, the effects of GGA on melanin synthesis in melanocytes have not been previously studied. Therefore, this study investigated the effects of GGA on melanogenesis and the related signaling pathways. MAIN METHODS Melanin content and tyrosinase activities were measured in Mel-Ab cells. GGA-induced signal transduction pathways were investigated by western blot analysis. KEY FINDINGS Our results showed that GGA significantly decreased melanin content in a concentration-dependent manner. Similarly, GGA reduced tyrosinase activity dose-dependently, but it did not directly inhibit tyrosinase. Western blot analysis indicated that GGA downregulated microphthalmia-associated transcription factor (MITF) and tyrosinase protein expression, whereas it increased the phosphorylation of extracellular signal-regulated kinase (ERK) and mammalian target of rapamycin (mTOR). Furthermore, a specific ERK pathway inhibitor, PD98059, blocked GGA-induced melanin reduction and then prevented downregulation of MITF and tyrosinase by GGA. However, a specific mTOR inhibitor, rapamycin, only slightly restored inhibition of melanin production by GGA, indicating that mTOR signaling is not a key mechanism regulating the inhibition of melanin production. SIGNIFICANCE These findings suggest that activation of ERK by GGA reduces melanin synthesis in Mel-Ab cells through downregulation of MITF and tyrosinase expression.
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26
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Darias MJ, Andree KB, Boglino A, Fernández I, Estévez A, Gisbert E. Coordinated regulation of chromatophore differentiation and melanogenesis during the ontogeny of skin pigmentation of Solea senegalensis (Kaup, 1858). PLoS One 2013; 8:e63005. [PMID: 23671650 PMCID: PMC3650040 DOI: 10.1371/journal.pone.0063005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 03/27/2013] [Indexed: 12/23/2022] Open
Abstract
Abnormal pigmentation of Senegalese sole has been described as one problem facing the full exploitation of its commercial production. To improve our understanding of flatfish pigmentation of this commercially important species we have evaluated eleven genes related to two different processes of pigmentation: melanophore differentiation, and melanin production. The temporal distribution of gene expression peaks corresponds well with changes in pigmentation patterns and the intensity of skin melanization. Several gene ratios were also examined to put in perspective possible genetic markers for the different stages of normal pigmentation development. Further, the phenotypic changes that occur during morphogenesis correspond well with the main transitions in gene expression that occur. Given the dramatic phenotypic alterations which flatfish undergo, including the asymmetric coloration that occurs between the ocular and the blind side, and the synchrony of the two processes of morphogenesis and pigmentation ontogenesis, these species constitute an interesting model for the study of pigmentation. In this study we present a first approximation towards explaining the genetic mechanisms for regulating pigmentation ontogeny in Senegalese sole, Solea senegalensis.
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Affiliation(s)
- Maria J Darias
- Centre de Sant Carles de la Ràpita, Unitat de Cultius Experimentals, Institut de Recerca i Tecnologia Agroalimentàries, Sant Carles de la Ràpita, Catalònia, Spain.
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Köhler HR, Schultz C, Scheil AE, Triebskorn R, Seifan M, Di Lellis MA. Historic data analysis reveals ambient temperature as a source of phenotypic variation in populations of the land snailTheba pisana. Biol J Linn Soc Lond 2013. [DOI: 10.1111/bij.12035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Heinz-R. Köhler
- Animal Physiological Ecology; Institute of Evolution and Ecology; University of Tübingen; Konrad-Adenauer-Strasse 20; D-72072; Tübingen; Germany
| | | | - Alexandra E. Scheil
- Animal Physiological Ecology; Institute of Evolution and Ecology; University of Tübingen; Konrad-Adenauer-Strasse 20; D-72072; Tübingen; Germany
| | | | - Merav Seifan
- Plant Ecology; Institute of Evolution and Ecology; University of Tübingen; Auf der Morgenstelle 3; D-72076; Tübingen; Germany
| | - Maddalena A. Di Lellis
- Animal Physiological Ecology; Institute of Evolution and Ecology; University of Tübingen; Konrad-Adenauer-Strasse 20; D-72072; Tübingen; Germany
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Danciu C, Borcan F, Bojin F, Zupko I, Dehelean C. Effect of the Isoflavone Genistein on Tumor Size, Metastasis Potential and Melanization in a B16 Mouse Model of Murine Melanoma. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300800318] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The isoflavonoid genistein, the aglycone of the heteroside genistin, possesses preventive effect on coronary heart disease and osteoporosis, antioxidant, anthelmintic, antineoplastic and anti-inflammatory properties. Much research has been undertaken regarding the action of genistein on cancer-preventing/treating effects, especially on breast and prostate cancer. The aim of this study was to analyze the effect of this compound in vivo by observing tumor size, metastasis potential and melanization in a mouse model of murine melanoma, employing the B164A5 melanoma cell line and C57BL/6J mice. Genistein decreased the tumor volume and weight by approximately 30%. Non-invasive measurements for both melanin and erythema showed that genistein reduced the quantity of melanin and the degree of erythema in direct proportion to the number of days of treatment. HE analysis diagnosed malignant melanoma in both groups, but no metastasis was recorded in the treated group compared with the liver metastasis in the untreated group after a period of 15 days of experiment at a dose of 15 mg/kg body weight of genistein. Genistein showed beneficial effects regarding tumor size, metastasis potential and melanization in a B16 mouse model of murine melanoma.
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Affiliation(s)
- Corina Danciu
- Departmentof Pharmacognosy, EftimieMurgu Square, No. 2, 300041 Timişoara, Romania
| | - Florin Borcan
- Department of Toxicology, EftimieMurgu Square, No. 2, 300041 Timişoara, Romania
| | - Florina Bojin
- Department of Physiology and Immunology, Faculty of Pharmacy, “Victor Babeş” University of Medicine and Pharmacy, EftimieMurgu Square, No. 2, 300041 Timişoara, Romania
| | - Istvan Zupko
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Eotvos u. 6., Szeged H-6720, Hungary
| | - Cristina Dehelean
- Departmentof Pharmacognosy, EftimieMurgu Square, No. 2, 300041 Timişoara, Romania
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Di Lellis MA, Seifan M, Troschinski S, Mazzia C, Capowiez Y, Triebskorn R, Köhler HR. Solar radiation stress in climbing snails: behavioural and intrinsic features define the Hsp70 level in natural populations of Xeropicta derbentina (Pulmonata). Cell Stress Chaperones 2012; 17:717-27. [PMID: 22639082 PMCID: PMC3468672 DOI: 10.1007/s12192-012-0344-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 05/03/2012] [Accepted: 05/07/2012] [Indexed: 11/26/2022] Open
Abstract
Ectotherms from sunny and hot environments need to cope with solar radiation. Mediterranean land snails of the superfamily Helicoidea feature a behavioural strategy to escape from solar radiation-induced excessive soil heating by climbing up vertical objects. The height of climbing, and also other parameters like shell colouration pattern, shell orientation, shell size, body mass, actual internal and shell surface temperature, and the interactions between those factors may be expected to modulate proteotoxic effects in snails exposed to solar radiation and, thus, their stress response. Focussing on natural populations of Xeropicta derbentina, we conducted a 'snapshot' field study using the individual Hsp70 level as a proxy for proteotoxic stress. In addition to correlation analyses, an IT-model selection approach based on Akaike's Information Criterion was applied to evaluate a set of models with respect to their explanatory power and to assess the relevance of each of the above-mentioned parameters for individual stress, by model averaging and parameter estimation. The analysis revealed particular importance of the individuals' shell size, height above ground, the shell colouration pattern and the interaction height × orientation. Our study showed that a distinct set of behavioural traits and intrinsic characters define the Hsp70 level and that environmental factors and individual features strongly interact.
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Affiliation(s)
- Maddalena A Di Lellis
- Animal Physiological Ecology, Institute of Evolution and Ecology, University of Tübingen, Konrad-Adenauer-Straße 20, Tübingen, Germany.
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Matsuda M, Hoshino T, Yamakawa N, Tahara K, Adachi H, Sobue G, Maji D, Ihn H, Mizushima T. Suppression of UV-induced wrinkle formation by induction of HSP70 expression in mice. J Invest Dermatol 2012; 133:919-28. [PMID: 23096703 DOI: 10.1038/jid.2012.383] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
UV-induced wrinkle formation owing to the degeneration of the extracellular matrix (ECM) is a major dermatological problem in which abnormal activation of matrix metalloproteinases (MMPs) and elastases have important roles. Heat shock protein 70 (HSP70) has cytoprotective and anti-inflammatory activities. In this study, we examined the effect of HSP70 expression on UV-induced wrinkle formation. Mild heat treatment (exposure to heated water at 42 °C) of the dorsal skin of hairless mice induced the expression of HSP70. The long-term repeated exposure to UV induced epidermal hyperplasia, decreased skin elasticity, degeneration of ECM, and wrinkle formation, which could be suppressed in mice concomitantly subjected to this heat treatment. The UV-induced epidermal hyperplasia, decreased skin elasticity, and degeneration of ECM were less apparent in transgenic mice expressing HSP70 than in wild-type mice. UV-induced fibroblast cell death, infiltration of inflammatory cells, and activation of MMPs and elastase in the skin were also suppressed in the transgenic mice. This study provides evidence for an inhibitory effect of HSP70 on UV-induced wrinkle formation. The results suggest that this effect is mediated by various properties of HSP70, including its cytoprotective and anti-inflammatory activities. We propose that HSP70 inducers used in a clinical context could prove beneficial for the prevention of UV-induced wrinkle formation.
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Affiliation(s)
- Minoru Matsuda
- Department of Analytical Chemistry, Keio University, Tokyo, Japan
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Chang H, Choi H, Joo KM, Kim D, Lee TR. Manassantin B inhibits melanosome transport in melanocytes by disrupting the melanophilin-myosin Va interaction. Pigment Cell Melanoma Res 2012; 25:765-72. [PMID: 22863119 DOI: 10.1111/pcmr.12002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Human skin hyperpigmentation disorders occur when the synthesis and/or distribution of melanin increases. The distribution of melanin in the skin is achieved by melanosome transport and transfer. The transport of melanosomes, the organelles where melanin is made, in a melanocyte precedes the transfer of the melanosomes to a keratinocyte. Therefore, hyperpigmentation can be regulated by decreasing melanosome transport. In this study, we found that an extract of Saururus chinensis Baill (ESCB) and one of its components, manassantin B, inhibited melanosome transport in Melan-a melanocytes and normal human melanocytes (NHMs). Manassantin B disturbed melanosome transport by disrupting the interaction between melanophilin and myosin Va. Manassantin B is neither a direct nor an indirect inhibitor of tyrosinase. The total melanin content was not reduced when melanosome transport was inhibited in a Melan-a melanocyte monoculture by manassantin B. Manassantin B decreased melanin content only when Melan-a melanocytes were co-cultured with SP-1 keratinocytes or stimulated by α-MSH. Therefore, we propose that specific inhibitors of melanosome transport, such as manassantin B, are potential candidate or lead compounds for the development of agents to treat undesirable hyperpigmentation of the skin.
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Affiliation(s)
- Huikyoung Chang
- R&D Center, AmorePacific Corporation, Giheung-gu, Yongin-si, Gyeonggi-do, Korea
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Melanogenesis stimulation in B16-F10 melanoma cells induces cell cycle alterations, increased ROS levels and a differential expression of proteins as revealed by proteomic analysis. Exp Cell Res 2012; 318:1913-25. [DOI: 10.1016/j.yexcr.2012.05.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 04/26/2012] [Accepted: 05/16/2012] [Indexed: 12/29/2022]
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Yamashita Y, Ikeda T, Matsuda M, Maji D, Hoshino T, Mizushima T. Purification and characterization of HSP-inducers from Eupatorium lindleyanum. Biochem Pharmacol 2012; 83:909-22. [DOI: 10.1016/j.bcp.2011.12.040] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 12/28/2011] [Accepted: 12/29/2011] [Indexed: 12/14/2022]
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Jia D, Rao W, Wang C, Jin C, Wang S, Chen D, Zhang M, Guo J, Chang Z, Liu J. Inhibition of B16 murine melanoma metastasis and enhancement of immunity by fever-range whole body hyperthermia. Int J Hyperthermia 2011; 27:275-85. [PMID: 21501029 DOI: 10.3109/02656736.2011.559613] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Whole body hyperthermia (WBH) has been regarded as a promising alternative therapy to cure late stage cancer with metastasis. As the final biological and therapeutic effects are dependent on the specific protocol, the potential of using a microwave-based WBH approach for metastasis inhibition is established and its typical results are discussed. MATERIALS AND METHODS The effectiveness of a 30-min whole body hyperthermia (WH) on animals, raised to a rectal temperature of 40.2° ± 0.3°C for 30 min followed by 84 h observation by 2450 MHz microwave irradiation, were evaluated. In an experimental lung metastasis model by injection of B16-F10 melanoma, lungs were removed from sacrificed mice 16 days after tumour implantation, and the expression of heat shock protein, inter-cellular adhesion molecule 1 (ICAM-1), proliferating cell nuclear antigen (PCNA) and cyclin D(1) was examined. CD4(+), CD8(+) and NK cell subpopulation in peripheral blood were measured by flow cytometry before and after the last treatment. RESULTS The best therapeutic effect was obtained when the mice were treated with WBH in combination with the initial chemotherapy with cis-diaminodichloroplatinum (CDDP) and dacarbazine (DTIC) (p < 0.05). The WBH alone has an advantage of reduced toxicity and lower cost. Heat shock protein (HSP) expression increased in the hyperthermia groups. Reduction of PCNA and cyclin D(1) was observed in the mice treated with WH alone or in combination with chemotherapy. In the hyperthermia groups, CD4(+)/CD8(+) decreased while the NK increased slightly. CONCLUSIONS The whole body hyperthermia protocol described in this work inhibits B16 tumour metastasis by inhibiting cell proliferation, neovascularisation and stimulating favourable immune responses. It demonstrated that WBH treatment benefits therapy of metastasis cancers.
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Affiliation(s)
- Dewei Jia
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, P.R. China
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