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Baptista MS, Cadet J, Greer A, Thomas AH. Practical Aspects in the Study of Biological Photosensitization Including Reaction Mechanisms and Product Analyses: A Do's and Don'ts Guide †. Photochem Photobiol 2022; 99:313-334. [PMID: 36575651 DOI: 10.1111/php.13774] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 12/24/2022] [Indexed: 12/29/2022]
Abstract
The interaction of light with natural matter leads to a plethora of photosensitized reactions. These reactions cause the degradation of biomolecules, such as DNA, lipids, proteins, being therefore detrimental to the living organisms, or they can also be beneficial by allowing the treatment of several diseases by photomedicine. Based on the molecular mechanistic understanding of the photosensitization reactions, we propose to classify them in four processes: oxygen-dependent (type I and type II processes) and oxygen-independent [triplet-triplet energy transfer (TTET) and photoadduct formation]. In here, these processes are discussed by considering a wide variety of approaches including time-resolved and steady-state techniques, together with solvent, quencher, and scavenger effects. The main aim of this survey is to provide a description of general techniques and approaches that can be used to investigate photosensitization reactions of biomolecules together with basic recommendations on good practices. Illustration of the suitability of these approaches is provided by the measurement of key biomarkers of singlet oxygen and one-electron oxidation reactions in both isolated and cellular DNA. Our work is an educational review that is mostly addressed to students and beginners.
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Affiliation(s)
- Maurício S Baptista
- Department of Biochemistry, Institute of Chemistry, Universidade de São Paulo, São Paulo, Brazil
| | - Jean Cadet
- Département de Médecine Nucléaire et de Radiobiologie, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Alexander Greer
- Department of Chemistry, Brooklyn College, Brooklyn, New York, USA.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, New York, USA
| | - Andrés H Thomas
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, La Plata, Argentina
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2
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Abstract
The incidence of cutaneous melanoma has been increasing worldwide, and melanoma disproportionately contributes to skin cancer mortality. The pathogenesis of melanoma involves genetic and environmental factors, and while the effects of ultraviolet B radiation on melanoma development are well researched, fewer studies have investigated the role of ultraviolet A (UVA) radiation. We comprehensively reviewed cell, animal and epidemiology studies on the association between UVA exposure and melanomagenesis. UVA radiation has been found to have negative effects on melanocytes due to the induction of oxidative stress, dysregulation of gene transcription and creation of mutagenic photoproducts in DNA. Animal studies demonstrate adverse effects of UVA on melanocytes, including the development of melanoma. Epidemiology studies, of varying quality, that examined participants' exposure to tanning devices which use UVA radiation primarily found that UVA exposure increased the risk for melanoma. Some studies reported larger associations with increased frequency of device use, suggestive of a dose-response relationship. Overall, we found that many studies supported a positive association between UVA exposure and melanoma on both molecular and population levels. Understanding the role of UVA in the development of melanoma will inform the implementation of preventive health interventions, such as those related to sunscreen development and use and increasing restrictions on indoor tanning.
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Affiliation(s)
- Raj P Fadadu
- Department of Dermatology, University of California
- Dermatology Service, San Francisco Veterans Affairs Health Care Center, San Francisco, California, USA
| | - Maria L Wei
- Department of Dermatology, University of California
- Dermatology Service, San Francisco Veterans Affairs Health Care Center, San Francisco, California, USA
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3
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Kalegari P, Leme DM, Disner GR, Cestari MM, de Lima Bellan D, Meira WV, Mazepa E, Martinez GR. High Melanin Content in Melanoma Cells Contributes to Enhanced DNA Damage after Rose Bengal Photosensitization. Photochem Photobiol 2022; 98:1355-1364. [PMID: 35398885 DOI: 10.1111/php.13632] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 04/03/2022] [Accepted: 04/06/2022] [Indexed: 11/30/2022]
Abstract
Melanoma is a type of tumor that originates from melanocytes. Irradiation of melanin with UVA and visible light can produce reactive oxygen species (ROS) such as singlet molecular oxygen (1 O2 ). The objective of this study was to examine DNA damage in melanoma cells (B16-F10) with different melanin contents, subjected to 1 O2 generation. To this end, we used the photosensitizer Rose Bengal acetate (RBAc) and irradiation with visible light (526 nm) (RBAc-PDT). We used the modified comet assay with the repair enzymes hOGG1 and T4 endonuclease V to detect the DNA damage associated with 8-oxo-7,8-dihydro-2'-deoxyguanosine and cyclobutane pyrimidine dimers lesions, respectively. We observed increased formation of hOGG1- and T4endoV-sensitive DNA lesions after light exposure (with or without RBAc). Furthermore, 18 h after irradiation, hOGG1-sensitive DNA lesions increased compared to that at the initial time point (0 h), which shows that a high melanin content contributes to post-irradiation formation of them, mainly via sustained oxidative stress, as confirmed by the measurement of ROS levels and activity of antioxidant enzymes. Contrastingly, the number of T4endoV-sensitive DNA lesions decreased over time (18 h). Our data indicate that in melanoma cells, a higher amount of melanin may affect DNA damage levels when subjected to RBAc-PDT.
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Affiliation(s)
- Paloma Kalegari
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências (Bioquímica), Setor de Ciências Biológicas, UFPR, Curitiba, Brazil
| | - Daniela Morais Leme
- Departamento de Genética, Setor de Ciências Biológicas, UFPR, Curitiba, Brazil
| | | | | | - Daniel de Lima Bellan
- Departamento de Biologia Celular, Setor de Ciências Biológicas, UFPR, Curitiba, Brazil
| | - Willian Vanderlei Meira
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências (Bioquímica), Setor de Ciências Biológicas, UFPR, Curitiba, Brazil
| | - Ester Mazepa
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências (Bioquímica), Setor de Ciências Biológicas, UFPR, Curitiba, Brazil
| | - Glaucia Regina Martinez
- Departamento de Bioquímica e Biologia Molecular, Programa de Pós-graduação em Ciências (Bioquímica), Setor de Ciências Biológicas, UFPR, Curitiba, Brazil
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4
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Comparative Study of Δ9-Tetrahydrocannabinol and Cannabidiol on Melanogenesis in Human Epidermal Melanocytes from Different Pigmentation Phototypes: A Pilot Study. J Xenobiot 2022; 12:131-144. [PMID: 35736025 PMCID: PMC9224588 DOI: 10.3390/jox12020012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/21/2022] [Accepted: 06/06/2022] [Indexed: 11/26/2022] Open
Abstract
Δ9-tetrahydrocannabinol (THC) is one of the primary ingredients of cannabis plants and is responsible for the psychoactive properties of cannabis. While cannabidiol (CBD), the non-psychoactive compound from cannabis, has been shown to stimulate human epidermal melanogenesis, the effects of THC have not been addressed in human epidermal melanocytes. Moreover, to date, no study has tested the effects of these compounds on melanocytes differing in pigmentation, representative of different skin phototypes, which would be significant as different ethnicities are known to differentially metabolize these xenobiotics. Herein, the effects of THC were studied and compared alongside CBD in human epidermal melanocytes derived from lightly-pigmented (HEMn-LP; Caucasian) and darkly-pigmented (HEMn-DP; African-American) cells over a chronic exposure of 6 d. Results demonstrated that both compounds displayed cytotoxicity at 4 µM but stimulated melanin synthesis and tyrosinase activity in a similar manner in LP and DP cells at nontoxic concentrations of 1–2 µM. However, THC and CBD showed a differential effect on dendricity in both cells; THC and CBD reversibly increased dendricity in LP cells while there was no significant change in DP cells. THC and CBD induced higher levels of reactive oxygen species (ROS) in LP cells while there was no change in the ROS levels in DP cells. In summary, although THC was relatively less cytotoxic as compared to CBD to both LP and DP cells, it exhibited a similar capacity as CBD to stimulate melanin synthesis and export in LP cells which was accompanied by a significant oxidative stress. DP cells were relatively resistant to the effects of both THC and CBD which might implicate the protective effects conferred by melanin in dark-skinned individuals.
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Haussmann PB, Pavani C, Marcolongo-Pereira C, Bellettini-Santos T, da Silva BS, Benedito IF, Freitas ML, Baptista MS, Chiarelli-Neto O. Melanin photosensitization by green light reduces melanoma tumor size. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2022. [DOI: 10.1016/j.jpap.2021.100092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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6
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Manganelli M, Guida S, Ferretta A, Pellacani G, Porcelli L, Azzariti A, Guida G. Behind the Scene: Exploiting MC1R in Skin Cancer Risk and Prevention. Genes (Basel) 2021; 12:1093. [PMID: 34356109 PMCID: PMC8305013 DOI: 10.3390/genes12071093] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 02/06/2023] Open
Abstract
Melanoma and non-melanoma skin cancers (NMSCs) are the most frequent cancers of the skin in white populations. An increased risk in the development of skin cancers has been associated with the combination of several environmental factors (i.e., ultraviolet exposure) and genetic background, including melanocortin-1 receptor (MC1R) status. In the last few years, advances in the diagnosis of skin cancers provided a great impact on clinical practice. Despite these advances, NMSCs are still the most common malignancy in humans and melanoma still shows a rising incidence and a poor prognosis when diagnosed at an advanced stage. Efforts are required to underlie the genetic and clinical heterogeneity of melanoma and NMSCs, leading to an optimization of the management of affected patients. The clinical implications of the impact of germline MC1R variants in melanoma and NMSCs' risk, together with the additional risk conferred by somatic mutations in other peculiar genes, as well as the role of MC1R screening in skin cancers' prevention will be addressed in the current review.
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Affiliation(s)
- Michele Manganelli
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari-“Aldo Moro”, 70125 Bari, Italy; (M.M.); (A.F.)
- DMMT-Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Stefania Guida
- Department of Surgical-Medical-Dental and Morphological Science with Interest Transplant-Oncological and Regenerative Medicine, University of Modena and Reggio Emilia, 41124 Modena, Italy;
| | - Anna Ferretta
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari-“Aldo Moro”, 70125 Bari, Italy; (M.M.); (A.F.)
| | - Giovanni Pellacani
- Department of Clinical Internal, Anesthesiological and Cardiovascular Sciences, Dermatology Clinic, Sapienza University of Rome, 00161 Rome, Italy;
| | - Letizia Porcelli
- Laboratory of Experimental Pharmacology, IRCCS Istituto Tumori Giovanni Paolo II, 70124 Bari, Italy; (L.P.); (A.A.)
| | - Amalia Azzariti
- Laboratory of Experimental Pharmacology, IRCCS Istituto Tumori Giovanni Paolo II, 70124 Bari, Italy; (L.P.); (A.A.)
| | - Gabriella Guida
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari-“Aldo Moro”, 70125 Bari, Italy; (M.M.); (A.F.)
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7
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Hu C, Huang Y, Luo P, Yang Y. Effect of antioxidants coenzyme Q10 and β-carotene on the cytotoxicity of vemurafenib against human malignant melanoma. Oncol Lett 2021; 21:208. [PMID: 33574947 PMCID: PMC7816282 DOI: 10.3892/ol.2021.12469] [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: 06/04/2020] [Accepted: 11/13/2020] [Indexed: 11/09/2022] Open
Abstract
Melanoma is a type of highly invasive skin cancer derived from melanocytes with poor prognosis. Vemurafenib (PLX4032) is a clinically approved targeted therapeutic for BRAF mutant melanoma that has a high therapeutic response rate and significantly prolongs the overall survival time of patients with melanoma. Antioxidants have been widely used as supplements for cancer prevention and for decreasing the side effects of cancer therapy. However, antioxidants can also protect cancer cells from oxidative stress and promote cancer growth and progression. The present study aimed to examine the effect of the antioxidants coenzyme Q10 (CoQ10) and β-carotene on melanoma cell growth and invasiveness and on the cytotoxicity of vemurafenib against both vemurafenib-sensitive (SK-MEL-28) and vemurafenib-resistant (A2058) human malignant melanoma cell lines. MTS assay and wound-healing assay demonstrated that CoQ10 alone significantly reduced the viability and migration of melanoma cells, respectively, and synergistically worked with vemurafenib to decrease the viability and migration of human melanoma cells. In contrast, MTS assay and flow cytometry revealed that β-carotene alone did not affect the viability and apoptosis induction of melanoma cells; however, it inhibited cell migration and invasiveness. Wound-healing and Transwell assay demonstrated that β-carotene alleviated the cytotoxicity of vemurafenib and mitigated the inhibitory effect of vemurafenib on cell migration and invasion. Both CoQ10 and β-carotene protected melanoma cells from undergoing apoptosis induced by vemurafenib. Immunoblotting demonstrated that β-carotene at physiological concentration worked synergistically with vemurafenib to suppress the Ras-Raf-Mek-Erk intracellular signaling pathway. The present study aimed to add to the evidence of the in vitro effects of CoQ10 and β-carotene on the antimelanoma effects of vemurafenib.
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Affiliation(s)
- Changkun Hu
- Division of Biology, Kansas State University, Manhattan, KS 66506, USA
| | - Yuan Huang
- Department of Hematopathology, Anqing Municipal Hospital, Anqing, Anhui 246004, P.R. China
| | - Peixiao Luo
- School of Natural Sciences, College of Science and Technology, Wenzhou Kean University, Wenzhou, Zhejiang 325035, P.R. China
| | - Yixin Yang
- School of Natural Sciences, College of Science and Technology, Wenzhou Kean University, Wenzhou, Zhejiang 325035, P.R. China.,School of Natural Sciences, The Dorothy and George Hennings College of Science, Mathematics and Technology, Kean University, Union, NJ 07083, USA
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8
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Gartrell BA, Roach M, Retter A, Sokol GH, Del Priore G, Scher HI. Phase II trial of SM-88, a cancer metabolism based therapy, in non-metastatic biochemical recurrent prostate cancer. Invest New Drugs 2020; 39:499-508. [PMID: 32924093 PMCID: PMC7960617 DOI: 10.1007/s10637-020-00993-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 08/21/2020] [Indexed: 11/27/2022]
Abstract
Background Androgen deprivation therapy (ADT) is a standard treatment for high-risk biochemically-recurrent, non-metastatic prostate cancer (BRPC) but is not curative and associated with toxicity. Racemetyrosine (SM-88) is an amino-acid analogue used with methoxsalen, phenytoin, and sirolimus (MPS) to enhance SM-88 activity. Method A phase 1b/2, open-label trial in BRPC and rising PSA. Patients were given daily SM-88 (230 mg BID), methoxsalen (10 mg), phenytoin (50 mg), and sirolimus (0.5 mg)). Outcome measures included changes in PSA, circulating tumor cells (CTCs) and imaging. Results 34 subjects were screened, 23 treated and 21 remained on study for ≥12 weeks. The median PSA was 6.4 ng/ml (range 1.7-80.1); doubling-time 6.2 months (range 1.4-36.6) and baseline testosterone 319.1 ng/ml (range 2.5-913.7). Median duration of therapy was 6.5 months (2.6-14.0). CTCs (median 48.5 cells/4 ml (range 15-268) at baseline) decreased a median of 65.3% in 18 of 19 patients. For patients who achieved an absolute CTC nadir count of <10 cells/4 ml (n = 10), disease control was 100% i.e. no metastases or PSA progression, while on trial (p = 0.005). PSA fell by ≥50% in 4.3% (1 subject). No patients developed metastatic disease while on treatment (metastases free survival =100%). There were no treatment-related adverse events (AEs) and quality of life was unchanged from baseline on the EORTC QLQ-C30 and QLQ-PR25. Testosterone levels rose slightly on SM-88 and were unrelated to efficacy or toxicity. Conclusions Use of SM-88 was associated with disease control while maintaining QOL. SM-88 may delay the need for ADT and the associated hormonal side effects. Larger trials are planned.Trial registration number, date of registration - NCT02796898, June 13, 2016.
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Affiliation(s)
- Benjamin A Gartrell
- Albert Einstein College of Medicine, Departments of Oncology and Urology, Montefiore Einstein Center for Cancer Care, Montefiore Medical Center, New York, NY, USA.
| | - Mack Roach
- Departments of Radiation Oncology & Urology, University of California San Francisco (UCSF) Helen Diller Family Comprehensive Cancer Center (HDFCC), San Francisco, CA, USA
| | - Avi Retter
- NY Cancer and Blood Specialist, East Setauket, NY, USA
| | - Gerald H Sokol
- Division of Clinical Pharmacology, Uniform Services University of the Health Sciences, Bethesda, MD, USA.,Florida Cancer Specialist and Research Institute, Fort Myers, FL, USA.,TYME Inc, New York, NY, USA
| | | | - Howard I Scher
- Genitourinary Oncology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Department of Medicine, Weill Cornell Medical College, New York, NY, USA
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Douki T. Oxidative Stress and Genotoxicity in Melanoma Induction: Impact on Repair Rather Than Formation of DNA Damage? Photochem Photobiol 2020; 96:962-972. [PMID: 32367509 DOI: 10.1111/php.13278] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 04/21/2020] [Indexed: 12/22/2022]
Abstract
Keratinocytes and melanocytes, two cutaneous cell types located within the epidermis, are the origin of most skin cancers, namely carcinomas and melanomas. These two types of tumors differ in many ways. First, carcinomas are almost 10 times more frequent than melanomas. In addition, the affected cellular pathways, the mutated genes and the metastatic properties of the tumors are not the same. This review addresses another specificity of melanomas: the role of photo-oxidative stress. UVA efficiently produces reactive oxygen species in melanocytes, which results in more frequent oxidatively generated DNA lesions than in other cell types. The question of the respective contribution of UVB-induced pyrimidine dimers and UVA-mediated oxidatively generated lesions to mutagenesis in melanoma remains open. Recent results based on next-generation sequencing techniques strongly suggest that the mutational signature associated with pyrimidine dimers is overwhelming in melanomas like in skin carcinomas. UVA-induced oxidative stress may yet be indirectly linked to the genotoxic pathways involved in melanoma through its ability to hamper DNA repair activities.
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Affiliation(s)
- Thierry Douki
- Université Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, Grenoble, France
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10
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Felton SJ, Shin BB, Watson REB, Kift R, Webb AR, Rhodes LE. Photoprotection conferred by low level summer sunlight exposures against pro-inflammatory UVR insult. Photochem Photobiol Sci 2020; 19:810-818. [PMID: 33856672 DOI: 10.1039/c9pp00452a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 03/31/2020] [Indexed: 11/21/2022]
Affiliation(s)
- S J Felton
- Dermatology Research Centre, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester and Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - B B Shin
- Dermatology Research Centre, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester and Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - R E B Watson
- Dermatology Research Centre, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester and Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - R Kift
- School of Earth and Environmental Sciences, Faculty of Science and Engineering, The University of Manchester, Manchester, UK
| | - A R Webb
- School of Earth and Environmental Sciences, Faculty of Science and Engineering, The University of Manchester, Manchester, UK
| | - L E Rhodes
- Dermatology Research Centre, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester and Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK.
- Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK.
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Taguchi N, Hata T, Kamiya E, Homma T, Kobayashi A, Aoki H, Kunisada T. Eriodictyon angustifolium extract, but not Eriodictyon californicum extract, reduces human hair greying. Int J Cosmet Sci 2020; 42:336-345. [PMID: 32324292 DOI: 10.1111/ics.12620] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 03/27/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Yerba Santa (Eriodictyon angustifolium and Eriodictyon californicum) has been used for many years in traditional medicine. However, the effect of Yerba Santa on melanogenesis has not yet been investigated. We aimed to assess the biological effects of Yerba Santa on hair pigmentation. METHODS Yerba Santa extracts were assessed for their cytological effects following X-ray irradiation treatment and then tested directly for the prevention of human hair greying. Ultra-performance liquid chromatography (UPLC) was utilized to identify the individual extract components. RESULTS Eriodictyon angustifolium extract significantly increased melanin synthesis in the melanoma cell line through activation of the WNT/MITF/tyrosinase-signalling pathway. In contrast, E. californicum had no effect on melanin synthesis. E. angustifolium extract also demonstrated a protective effect against the damage induced by X-ray irradiation in human keratinocytes. Application of the extracts to subjects who had grey beards demonstrated a reduced number of grey beard hair per year specifically with the E. angustifolium extract. A significant decrease in grey head hair was also observed after application of E. angustifolium extract. Upregulation of gene expression related to melanin production and WNT signalling was observed after the application of E. angustifolium extract. Sterubin was the most abundant flavonoid detected by UPLC in E. angustifolium extract. In addition, sterubin showed the highest difference in terms of quantity, between E. angustifolium and E. californicum extract. CONCLUSION Eriodictyon angustifolium extract, which is abundant in sterubin, may be suitable as a potential cosmetic and medical agent for the prevention and improvement of hair greying.
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Affiliation(s)
- N Taguchi
- General Research & Development Institute, Hoyu Co., Ltd., Aichi, 4801136, Japan.,Department of Tissue and Organ Development, Regeneration and Advanced Medical Science, Gifu University Graduate School of Medicine, Gifu, 5011194, Japan
| | - T Hata
- General Research & Development Institute, Hoyu Co., Ltd., Aichi, 4801136, Japan
| | - E Kamiya
- General Research & Development Institute, Hoyu Co., Ltd., Aichi, 4801136, Japan
| | - T Homma
- General Research & Development Institute, Hoyu Co., Ltd., Aichi, 4801136, Japan
| | - A Kobayashi
- General Research & Development Institute, Hoyu Co., Ltd., Aichi, 4801136, Japan
| | - H Aoki
- Department of Tissue and Organ Development, Regeneration and Advanced Medical Science, Gifu University Graduate School of Medicine, Gifu, 5011194, Japan
| | - T Kunisada
- Department of Tissue and Organ Development, Regeneration and Advanced Medical Science, Gifu University Graduate School of Medicine, Gifu, 5011194, Japan
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12
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Calabrese C, Davidson NR, Demircioğlu D, Fonseca NA, He Y, Kahles A, Lehmann KV, Liu F, Shiraishi Y, Soulette CM, Urban L, Greger L, Li S, Liu D, Perry MD, Xiang Q, Zhang F, Zhang J, Bailey P, Erkek S, Hoadley KA, Hou Y, Huska MR, Kilpinen H, Korbel JO, Marin MG, Markowski J, Nandi T, Pan-Hammarström Q, Pedamallu CS, Siebert R, Stark SG, Su H, Tan P, Waszak SM, Yung C, Zhu S, Awadalla P, Creighton CJ, Meyerson M, Ouellette BFF, Wu K, Yang H, Brazma A, Brooks AN, Göke J, Rätsch G, Schwarz RF, Stegle O, Zhang Z. Genomic basis for RNA alterations in cancer. Nature 2020; 578:129-136. [PMID: 32025019 PMCID: PMC7054216 DOI: 10.1038/s41586-020-1970-0] [Citation(s) in RCA: 241] [Impact Index Per Article: 60.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 12/11/2019] [Indexed: 01/27/2023]
Abstract
Transcript alterations often result from somatic changes in cancer genomes1. Various forms of RNA alterations have been described in cancer, including overexpression2, altered splicing3 and gene fusions4; however, it is difficult to attribute these to underlying genomic changes owing to heterogeneity among patients and tumour types, and the relatively small cohorts of patients for whom samples have been analysed by both transcriptome and whole-genome sequencing. Here we present, to our knowledge, the most comprehensive catalogue of cancer-associated gene alterations to date, obtained by characterizing tumour transcriptomes from 1,188 donors of the Pan-Cancer Analysis of Whole Genomes (PCAWG) Consortium of the International Cancer Genome Consortium (ICGC) and The Cancer Genome Atlas (TCGA)5. Using matched whole-genome sequencing data, we associated several categories of RNA alterations with germline and somatic DNA alterations, and identified probable genetic mechanisms. Somatic copy-number alterations were the major drivers of variations in total gene and allele-specific expression. We identified 649 associations of somatic single-nucleotide variants with gene expression in cis, of which 68.4% involved associations with flanking non-coding regions of the gene. We found 1,900 splicing alterations associated with somatic mutations, including the formation of exons within introns in proximity to Alu elements. In addition, 82% of gene fusions were associated with structural variants, including 75 of a new class, termed 'bridged' fusions, in which a third genomic location bridges two genes. We observed transcriptomic alteration signatures that differ between cancer types and have associations with variations in DNA mutational signatures. This compendium of RNA alterations in the genomic context provides a rich resource for identifying genes and mechanisms that are functionally implicated in cancer.
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Affiliation(s)
| | - Claudia Calabrese
- 0000 0000 9709 7726grid.225360.0European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
| | - Natalie R. Davidson
- 0000 0001 2156 2780grid.5801.cETH Zurich, Zurich, Switzerland ,0000 0001 2171 9952grid.51462.34Memorial Sloan Kettering Cancer Center, New York, NY USA ,000000041936877Xgrid.5386.8Weill Cornell Medical College, New York, NY USA ,0000 0001 2223 3006grid.419765.8SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland ,0000 0004 0478 9977grid.412004.3University Hospital Zurich, Zurich, Switzerland
| | - Deniz Demircioğlu
- 0000 0001 2180 6431grid.4280.eNational University of Singapore, Singapore, Singapore ,0000 0004 0620 715Xgrid.418377.eGenome Institute of Singapore, Singapore, Singapore
| | - Nuno A. Fonseca
- 0000 0000 9709 7726grid.225360.0European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
| | - Yao He
- 0000 0001 2256 9319grid.11135.37Peking University, Beijing, China
| | - André Kahles
- 0000 0001 2156 2780grid.5801.cETH Zurich, Zurich, Switzerland ,0000 0001 2171 9952grid.51462.34Memorial Sloan Kettering Cancer Center, New York, NY USA ,0000 0001 2223 3006grid.419765.8SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland ,0000 0004 0478 9977grid.412004.3University Hospital Zurich, Zurich, Switzerland
| | - Kjong-Van Lehmann
- 0000 0001 2156 2780grid.5801.cETH Zurich, Zurich, Switzerland ,0000 0001 2171 9952grid.51462.34Memorial Sloan Kettering Cancer Center, New York, NY USA ,0000 0001 2223 3006grid.419765.8SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland ,0000 0004 0478 9977grid.412004.3University Hospital Zurich, Zurich, Switzerland
| | - Fenglin Liu
- 0000 0001 2256 9319grid.11135.37Peking University, Beijing, China
| | - Yuichi Shiraishi
- 0000 0001 2151 536Xgrid.26999.3dThe University of Tokyo, Minato-ku, Japan
| | - Cameron M. Soulette
- 0000 0001 0740 6917grid.205975.cUniversity of California, Santa Cruz, Santa Cruz, CA USA
| | - Lara Urban
- 0000 0000 9709 7726grid.225360.0European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
| | - Liliana Greger
- 0000 0000 9709 7726grid.225360.0European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
| | - Siliang Li
- 0000 0001 2034 1839grid.21155.32BGI-Shenzhen, Shenzhen, China ,China National GeneBank-Shenzhen, Shenzhen, China
| | - Dongbing Liu
- 0000 0001 2034 1839grid.21155.32BGI-Shenzhen, Shenzhen, China ,China National GeneBank-Shenzhen, Shenzhen, China
| | - Marc D. Perry
- 0000 0004 0626 690Xgrid.419890.dOntario Institute for Cancer Research, Toronto, Ontario, Canada ,0000 0001 2297 6811grid.266102.1University of California, San Francisco, San Francisco, CA USA
| | - Qian Xiang
- 0000 0004 0626 690Xgrid.419890.dOntario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Fan Zhang
- 0000 0001 2256 9319grid.11135.37Peking University, Beijing, China
| | - Junjun Zhang
- 0000 0004 0626 690Xgrid.419890.dOntario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Peter Bailey
- 0000 0001 2193 314Xgrid.8756.cUniversity of Glasgow, Glasgow, UK
| | - Serap Erkek
- 0000 0004 0495 846Xgrid.4709.aEuropean Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany
| | - Katherine A. Hoadley
- 0000000122483208grid.10698.36The University of North Carolina at Chapel Hill, Chapel Hill, NC USA
| | - Yong Hou
- 0000 0001 2034 1839grid.21155.32BGI-Shenzhen, Shenzhen, China ,China National GeneBank-Shenzhen, Shenzhen, China
| | - Matthew R. Huska
- 0000 0001 1014 0849grid.419491.0Berlin Institute for Medical Systems Biology, Max Delbruck Center for Molecular Medicine, Berlin, Germany
| | - Helena Kilpinen
- 0000000121901201grid.83440.3bUniversity College London, London, UK
| | - Jan O. Korbel
- 0000 0004 0495 846Xgrid.4709.aEuropean Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany
| | - Maximillian G. Marin
- 0000 0001 0740 6917grid.205975.cUniversity of California, Santa Cruz, Santa Cruz, CA USA
| | - Julia Markowski
- 0000 0001 1014 0849grid.419491.0Berlin Institute for Medical Systems Biology, Max Delbruck Center for Molecular Medicine, Berlin, Germany
| | - Tannistha Nandi
- 0000 0004 0620 715Xgrid.418377.eGenome Institute of Singapore, Singapore, Singapore
| | - Qiang Pan-Hammarström
- 0000 0001 2034 1839grid.21155.32BGI-Shenzhen, Shenzhen, China ,0000 0004 1937 0626grid.4714.6Karolinska Institutet, Stockholm, Sweden
| | - Chandra Sekhar Pedamallu
- grid.66859.34Broad Institute, Cambridge, MA USA ,0000 0001 2106 9910grid.65499.37Dana-Farber Cancer Institute, Boston, MA USA ,000000041936754Xgrid.38142.3cHarvard Medical School, Boston, MA USA
| | - Reiner Siebert
- grid.410712.1Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Stefan G. Stark
- 0000 0001 2156 2780grid.5801.cETH Zurich, Zurich, Switzerland ,0000 0001 2171 9952grid.51462.34Memorial Sloan Kettering Cancer Center, New York, NY USA ,0000 0001 2223 3006grid.419765.8SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland ,0000 0004 0478 9977grid.412004.3University Hospital Zurich, Zurich, Switzerland
| | - Hong Su
- 0000 0001 2034 1839grid.21155.32BGI-Shenzhen, Shenzhen, China ,China National GeneBank-Shenzhen, Shenzhen, China
| | - Patrick Tan
- 0000 0004 0620 715Xgrid.418377.eGenome Institute of Singapore, Singapore, Singapore ,0000 0004 0385 0924grid.428397.3Duke-NUS Medical School, Singapore, Singapore
| | - Sebastian M. Waszak
- 0000 0004 0495 846Xgrid.4709.aEuropean Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany
| | - Christina Yung
- 0000 0004 0626 690Xgrid.419890.dOntario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Shida Zhu
- 0000 0001 2034 1839grid.21155.32BGI-Shenzhen, Shenzhen, China ,China National GeneBank-Shenzhen, Shenzhen, China
| | - Philip Awadalla
- 0000 0004 0626 690Xgrid.419890.dOntario Institute for Cancer Research, Toronto, Ontario, Canada ,0000 0001 2157 2938grid.17063.33University of Toronto, Toronto, Ontario Canada
| | - Chad J. Creighton
- 0000 0001 2160 926Xgrid.39382.33Baylor College of Medicine, Houston, TX USA
| | - Matthew Meyerson
- grid.66859.34Broad Institute, Cambridge, MA USA ,0000 0001 2106 9910grid.65499.37Dana-Farber Cancer Institute, Boston, MA USA ,000000041936754Xgrid.38142.3cHarvard Medical School, Boston, MA USA
| | | | - Kui Wu
- 0000 0001 2034 1839grid.21155.32BGI-Shenzhen, Shenzhen, China ,China National GeneBank-Shenzhen, Shenzhen, China
| | - Huanming Yang
- 0000 0001 2034 1839grid.21155.32BGI-Shenzhen, Shenzhen, China
| | | | - Alvis Brazma
- 0000 0000 9709 7726grid.225360.0European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
| | - Angela N. Brooks
- 0000 0001 0740 6917grid.205975.cUniversity of California, Santa Cruz, Santa Cruz, CA USA ,grid.66859.34Broad Institute, Cambridge, MA USA ,0000 0001 2106 9910grid.65499.37Dana-Farber Cancer Institute, Boston, MA USA
| | - Jonathan Göke
- 0000 0004 0620 715Xgrid.418377.eGenome Institute of Singapore, Singapore, Singapore ,0000 0004 0620 9745grid.410724.4National Cancer Centre Singapore, Singapore, Singapore
| | - Gunnar Rätsch
- 0000 0001 2156 2780grid.5801.cETH Zurich, Zurich, Switzerland ,0000 0001 2171 9952grid.51462.34Memorial Sloan Kettering Cancer Center, New York, NY USA ,000000041936877Xgrid.5386.8Weill Cornell Medical College, New York, NY USA ,0000 0001 2223 3006grid.419765.8SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland ,0000 0004 0478 9977grid.412004.3University Hospital Zurich, Zurich, Switzerland
| | - Roland F. Schwarz
- 0000 0000 9709 7726grid.225360.0European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK ,0000 0001 1014 0849grid.419491.0Berlin Institute for Medical Systems Biology, Max Delbruck Center for Molecular Medicine, Berlin, Germany ,0000 0004 0492 0584grid.7497.dGerman Cancer Consortium (DKTK), partner site Berlin, Germany ,0000 0004 0492 0584grid.7497.dGerman Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Oliver Stegle
- 0000 0000 9709 7726grid.225360.0European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK ,0000 0004 0495 846Xgrid.4709.aEuropean Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany ,0000 0004 0492 0584grid.7497.dGerman Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Zemin Zhang
- 0000 0001 2256 9319grid.11135.37Peking University, Beijing, China
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13
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Sun CK, Liu WM, Liao YH. Study on melanin enhanced third harmonic generation in a live cell model. BIOMEDICAL OPTICS EXPRESS 2019; 10:5716-5723. [PMID: 31799042 PMCID: PMC6865104 DOI: 10.1364/boe.10.005716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/20/2019] [Accepted: 10/04/2019] [Indexed: 05/08/2023]
Abstract
Melanin dominates the endogenous contrasts of in vivo third harmonic generation (THG) imaging of human skin. A recent study investigated the THG in melanin solution and a linear relationship between melanin concentration and THG intensity was reported, in contrast to the expected nonlinear relationship. Since melanin hydrocolloid solution is very different from the skin tissue, here we report our study on the origin of the melanin-enhanced THG by using a live cell model. Different from the previous conclusion, our live cell study has indicated an initial nonlinear process where the THG intensity was enhanced according to the 3.5th power of melanin mass density (MMD). When the MMD is higher than 11 mg/ml, a transition from the resonance-enhanced THG to the high-order hyper-Rayleigh scattering process occurs. This saturation phenomenon of the virtual-transition-based THG nonlinear process is attributed to the multi-melanosome-induced scattering within the sub-femtoliter focal volume.
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Affiliation(s)
- Chi-Kuang Sun
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Min Liu
- Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Hua Liao
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei 10002, Taiwan
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14
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Ju KY, Degan S, Fischer MC, Zhou KC, Jia X, Yu J, Warren WS. Unraveling the molecular nature of melanin changes in metastatic cancer. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-13. [PMID: 30977334 PMCID: PMC6460485 DOI: 10.1117/1.jbo.24.5.051414] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 03/11/2019] [Indexed: 05/27/2023]
Abstract
More people die from melanoma after a stage I diagnosis than after a stage IV diagnosis, because the tools available to clinicians do not readily identify which early-stage cancers will be aggressive. Near-infrared pump-probe microscopy detects fundamental differences in melanin structure between benign human moles and melanoma and also correlates with metastatic potential. However, the biological mechanisms of these changes have been difficult to quantify, as many different mechanisms can contribute to the pump-probe signal. We use model systems (sepia, squid, and synthetic eumelanin), cellular uptake studies, and a range of pump and probe wavelengths to demonstrate that the clinically observed effects come from alterations of the aggregated mode from "thick oligomer stacks" to "thin oligomer stacks" (due to changes in monomer composition) and (predominantly) deaggregation of the assembled melanin structure. This provides the opportunity to use pump-probe microscopy for the detection and study of melanin-associated diseases.
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Affiliation(s)
- Kuk-Youn Ju
- Duke University, Department of Chemistry, Durham, North Carolina, United States
| | - Simone Degan
- Duke University, Department of Chemistry, Durham, North Carolina, United States
- Duke University, Department of Radiology, Durham, North Carolina, United States
| | - Martin C. Fischer
- Duke University, Department of Chemistry, Durham, North Carolina, United States
- Duke University, Department of Physics, Durham, North Carolina, United States
| | - Kevin C. Zhou
- Duke University, Department of Biomedical Engineering, Durham, North Carolina, United States
| | - Xiaomeng Jia
- Duke University, Department of Physics, Durham, North Carolina, United States
| | - Jin Yu
- Duke University, Department of Chemistry, Durham, North Carolina, United States
| | - Warren S. Warren
- Duke University, Department of Chemistry, Durham, North Carolina, United States
- Duke University, Department of Radiology, Durham, North Carolina, United States
- Duke University, Department of Physics, Durham, North Carolina, United States
- Duke University, Department of Biomedical Engineering, Durham, North Carolina, United States
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15
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A first-in-human study of the novel metabolism-based anti-cancer agent SM-88 in subjects with advanced metastatic cancer. Invest New Drugs 2019; 38:392-401. [PMID: 30929156 PMCID: PMC7066285 DOI: 10.1007/s10637-019-00758-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 03/06/2019] [Indexed: 12/31/2022]
Abstract
Purpose SM-88 (D,L-alpha-metyrosine; racemetyrosine) is a novel anti-cancer agent, used with melanin, phenytoin, and sirolimus (SMK Therapy). This pilot first-in-human study characterized the safety, tolerability, and efficacy of SMK Therapy in subjects with advanced metastatic cancer. Methods All subjects (n = 30) received SMK Therapy for an initial 6 week Cycle (5 days on, 2 off per week) and continued if well tolerated. Safety signals, clinical response, overall survival, progression free survival (PFS), and quality of life changes were assessed. Results The most common drug related adverse events were hyperpigmentation and rash. All drug related adverse events were mild to moderate in intensity. Following treatment with SMK Therapy, 4 subjects achieved complete response, 6 partial response, and 17 stable disease according to Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 (total clinical benefit 90%). Responses were observed within 6 weeks, and continued to improve, with 3 complete and 3 partial responders achieving best response after at least 3.2 months. Durable stable disease was observed, lasting a median duration of 11 months (range 1–31 months). Median overall survival for all subjects was 29.8 months, and median PFS was 13 months. Following 6 weeks of treatment, most (83.3%) subjects showed an improvement in Eastern Cooperative Oncology Group (ECOG) score and an improvement in the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ 30) global health status (baseline 61.2 ± 25.0; end of Cycle 1 80.7 ± 14.7; n = 29; p < 0.001). Conclusions The results of this study support continued development of SM-88.
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16
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Di Mascio P, Martinez GR, Miyamoto S, Ronsein GE, Medeiros MHG, Cadet J. Singlet Molecular Oxygen Reactions with Nucleic Acids, Lipids, and Proteins. Chem Rev 2019; 119:2043-2086. [DOI: 10.1021/acs.chemrev.8b00554] [Citation(s) in RCA: 253] [Impact Index Per Article: 50.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Paolo Di Mascio
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, CP 26077, CEP 05508-000, São Paulo, SP Brazil
| | - Glaucia R. Martinez
- Departamento de Bioquímica e Biologia Molecular, Setor de Ciências Biológicas, Universidade Federal do Paraná, 81531-990 Curitiba, PR, Brazil
| | - Sayuri Miyamoto
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, CP 26077, CEP 05508-000, São Paulo, SP Brazil
| | - Graziella E. Ronsein
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, CP 26077, CEP 05508-000, São Paulo, SP Brazil
| | - Marisa H. G. Medeiros
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, CP 26077, CEP 05508-000, São Paulo, SP Brazil
| | - Jean Cadet
- Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, J1H 5N4 Québec, Canada
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17
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Cadet J, Douki T. Formation of UV-induced DNA damage contributing to skin cancer development. Photochem Photobiol Sci 2018; 17:1816-1841. [PMID: 29405222 DOI: 10.1039/c7pp00395a] [Citation(s) in RCA: 209] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
UV-induced DNA damage plays a key role in the initiation phase of skin cancer. When left unrepaired or when damaged cells are not eliminated by apoptosis, DNA lesions express their mutagneic properties, leading to the activation of proto-oncogene or the inactivation of tumor suppression genes. The chemical nature and the amount of DNA damage strongly depend on the wavelength of the incident photons. The most energetic part of the solar spectrum at the Earth's surface (UVB, 280-320 nm) leads to the formation of cyclobutane pyrimidine dimers (CPDs) and pyrimidine (6-4) pyrimidone photoproducts (64PPs). Less energetic but 20-times more intense UVA (320-400 nm) also induces the formation of CPDs together with a wide variety of oxidatively generated lesions such as single strand breaks and oxidized bases. Among those, 8-oxo-7,8-dihydroguanine (8-oxoGua) is the most frequent since it can be produced by several mechanisms. Data available on the respective yield of DNA photoproducts in cells and skin show that exposure to sunlight mostly induces pyrimidine dimers, which explains the mutational signature found in skin tumors, with lower amounts of 8-oxoGua and strand breaks. The present review aims at describing the basic photochemistry of DNA and discussing the quantitative formation of the different UV-induced DNA lesions reported in the literature. Additional information on mutagenesis, repair and photoprotection is briefly provided.
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Affiliation(s)
- Jean Cadet
- Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine, 3001 12e Avenue Nord, Université de Sherbrooke, Sherbrooke, Québec JIH 5N4, Canada.
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18
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Kassouf N, Kay CWM, Volkov A, Chiang SC, Birch-Machin MA, El-Khamisy SF, Haywood RM. UVA-induced carbon-centred radicals in lightly pigmented cells detected using ESR spectroscopy. Free Radic Biol Med 2018; 126:153-165. [PMID: 30055236 DOI: 10.1016/j.freeradbiomed.2018.07.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 07/19/2018] [Accepted: 07/24/2018] [Indexed: 12/20/2022]
Abstract
Ultraviolet-A and melanin are implicated in melanoma, but whether melanin in vivo screens or acts as a UVA photosensitiser is debated. Here, we investigate the effect of UVA-irradiation on non-pigmented, lightly and darkly pigmented melanocytes and melanoma cells using electron spin resonance (ESR) spectroscopy. Using the spin trap 5,5 Dimethyl-1-pyrroline N-oxide (DMPO), carbon adducts were detected in all cells. However, higher levels of carbon adducts were detected in lightly pigmented cells than in non-pigmented or darkly pigmented cells. Nevertheless, when melanin levels were artificially increased in lightly pigmented cells by incubation with L-Tyrosine, the levels of carbon adducts decreased significantly. Carbon adducts were also detected in UVA-irradiated melanin-free cell nuclei, DNA-melanin systems, and the nucleoside 2'-deoxyguanosine combined with melanin, whereas they were only weakly detected in irradiated synthetic melanin and not at all in irradiated 2'-deoxyguanosine. The similarity of these carbon adducts suggests they may be derived from nucleic acid- guanine - radicals. These observations suggest that melanin is not consistently a UVA screen against free-radical formation in pigmented cells, but may also act as a photosensitizer for the formation of nucleic acid radicals in addition to superoxide. The findings are important for our understanding of the mechanism of damage caused by the UVA component of sunlight in non-melanoma and melanoma cells, and hence the causes of skin cancer.
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Affiliation(s)
- Nick Kassouf
- RAFT Institute, Mount Vernon Hospital, Northwood, Middlesex HA6 2RN, UK
| | - Christopher W M Kay
- Institute of Structural & Molecular Biology and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, UK; Department of Chemistry, University of Saarland, Saarbrücken 66123, Germany
| | - Arsen Volkov
- RAFT Institute, Mount Vernon Hospital, Northwood, Middlesex HA6 2RN, UK
| | - Shih-Chieh Chiang
- Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, UK
| | - Mark A Birch-Machin
- Dermatological Sciences, Institute of Cellular Medicine, The Medical School, Newcastle University, NE2 4HH, UK
| | - Sherif F El-Khamisy
- Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, UK
| | - Rachel M Haywood
- RAFT Institute, Mount Vernon Hospital, Northwood, Middlesex HA6 2RN, UK.
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19
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Jouberton E, Perrot Y, Dirat B, Billoux T, Auzeloux P, Cachin F, Chezal J, Filaire M, Labarre P, Miot‐Noirault E, Millardet C, Valla C, Vidal A, Degoul F, Maigne L. Radiation dosimetry of [
131
I]ICF01012 in rabbits: Application to targeted radionuclide therapy for human melanoma treatment. Med Phys 2018; 45:5251-5262. [DOI: 10.1002/mp.13165] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/24/2018] [Accepted: 08/06/2018] [Indexed: 01/28/2023] Open
Affiliation(s)
- Elodie Jouberton
- Centre Jean Perrin Clermont‐Ferrand F‐63011 France
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | - Yann Perrot
- Université Clermont Auvergne CNRS/IN2P3 Laboratoire de Physique de Clermont UMR6533 4 Avenue Blaise Pascal TSA 60026 CS 60026 63178 Aubière Cedex France
| | - Béatrice Dirat
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | | | - Philippe Auzeloux
- Centre Jean Perrin Clermont‐Ferrand F‐63011 France
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | - Florent Cachin
- Centre Jean Perrin Clermont‐Ferrand F‐63011 France
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | - Jean‐Michel Chezal
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | - Marc Filaire
- Centre Jean Perrin Clermont‐Ferrand F‐63011 France
| | - Pierre Labarre
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | - Elisabeth Miot‐Noirault
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | | | - Clémence Valla
- Centre Jean Perrin Clermont‐Ferrand F‐63011 France
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | - Aurélien Vidal
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | - Françoise Degoul
- Université Clermont Auvergne INSERM Imagerie Moléculaire et Stratégies Théranostiques UMR1240 58 Rue Montalembert 63 005 Clermont‐Ferrand CedexFrance
| | - Lydia Maigne
- Université Clermont Auvergne CNRS/IN2P3 Laboratoire de Physique de Clermont UMR6533 4 Avenue Blaise Pascal TSA 60026 CS 60026 63178 Aubière Cedex France
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20
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Khan AQ, Travers JB, Kemp MG. Roles of UVA radiation and DNA damage responses in melanoma pathogenesis. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2018; 59:438-460. [PMID: 29466611 PMCID: PMC6031472 DOI: 10.1002/em.22176] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/18/2018] [Accepted: 01/22/2018] [Indexed: 05/10/2023]
Abstract
The growing incidence of melanoma is a serious public health issue that merits a thorough understanding of potential causative risk factors, which includes exposure to ultraviolet radiation (UVR). Though UVR has been classified as a complete carcinogen and has long been recognized for its ability to damage genomic DNA through both direct and indirect means, the precise mechanisms by which the UVA and UVB components of UVR contribute to the pathogenesis of melanoma have not been clearly defined. In this review, we therefore highlight recent studies that have addressed roles for UVA radiation in the generation of DNA damage and in modulating the subsequent cellular responses to DNA damage in melanocytes, which are the cell type that gives rise to melanoma. Recent research suggests that UVA not only contributes to the direct formation of DNA lesions but also impairs the removal of UV photoproducts from genomic DNA through oxidation and damage to DNA repair proteins. Moreover, the melanocyte microenvironment within the epidermis of the skin is also expected to impact melanomagenesis, and we therefore discuss several paracrine signaling pathways that have been shown to impact the DNA damage response in UV-irradiated melanocytes. Lastly, we examine how alterations to the immune microenvironment by UVA-associated DNA damage responses may contribute to melanoma development. Thus, there appear to be multiple avenues by which UVA may elevate the risk of melanoma. Protective strategies against excess exposure to UVA wavelengths of light therefore have the potential to decrease the incidence of melanoma. Environ. Mol. Mutagen. 59:438-460, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Aiman Q Khan
- Department of Pharmacology and Toxicology, Wright State University Boonshoft School of Medicine, Dayton, Ohio
| | - Jeffrey B Travers
- Department of Pharmacology and Toxicology, Wright State University Boonshoft School of Medicine, Dayton, Ohio
- Dayton Veterans Affairs Medical Center, Dayton, Ohio
| | - Michael G Kemp
- Department of Pharmacology and Toxicology, Wright State University Boonshoft School of Medicine, Dayton, Ohio
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21
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Ellijimi C, Ben Hammouda M, Othman H, Moslah W, Jebali J, Mabrouk HB, Morjen M, Haoues M, Luis J, Marrakchi N, Essafi-Benkhadir K, Srairi-Abid N. Helix aspersa maxima mucus exhibits antimelanogenic and antitumoral effects against melanoma cells. Biomed Pharmacother 2018; 101:871-880. [PMID: 29635896 DOI: 10.1016/j.biopha.2018.03.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 03/05/2018] [Accepted: 03/05/2018] [Indexed: 01/10/2023] Open
Abstract
Snail secretion is currently revolutionizing the world of cosmetics and human skin care. The efficacy of snail secretion in wounds healing has been proven both in vitro and by clinical studies. However, the potential anti-tumor effect of snail secretion was poorly investigated. In this report, our in vitro study showed that Helix aspersa maxima species snail slime (SS) could not only treat melanogenesis but also endowed with anti-tumoral activity against human melanoma cells. Indeed, SS reduced melanin content and tyrosinase activity on B16F10 cells with IC50 values of 288 μg/mL and 286 μg/mL, respectively, without altering cell viability. This effect was also observed, at a lesser extent, on human melanoma IGR-39 and SK-MEL-28 cell lines. On another hand, SS specifically inhibited the viability of IGR-39 and SK-MEL-28 cells associated to an apoptotic effect highlighted by PARP cleavage. It is worth to note that SS did not affect the viability of B16F10 cells and non tumorigenic HaCaT cells. Interestingly, this extract was found to inhibit migration and invasion of both human melanoma cells through reducing the expression of Matrix metalloproteinase MMP2. Snail slime also exerted a high inhibitory effect on IGR-39 cell adhesion through blocking the function of α2β1 (45%), αvβ3 (38%) integrins and by reducing the expression levels of αv and β1 integrins. The presented results shed light on the potential anti-melanoma effect of SS and support its use against skin diseases.
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Affiliation(s)
- Chedli Ellijimi
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire des Venins et biomolécules thérapeutiques LR11IPT08/ LR16IPT08, Tunis, 1002, Tunisia
| | - Manel Ben Hammouda
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Epidémiologie Moléculaire et Pathologie Expérimentale appliquée aux Maladies infectieuses LR11IPT04/LR16IPT04, Tunis, 1002, Tunisia
| | - Houcemeddine Othman
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire des Venins et biomolécules thérapeutiques LR11IPT08/ LR16IPT08, Tunis, 1002, Tunisia
| | - Wassim Moslah
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire des Venins et biomolécules thérapeutiques LR11IPT08/ LR16IPT08, Tunis, 1002, Tunisia
| | - Jed Jebali
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire des Venins et biomolécules thérapeutiques LR11IPT08/ LR16IPT08, Tunis, 1002, Tunisia
| | - Hazem Ben Mabrouk
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire des Venins et biomolécules thérapeutiques LR11IPT08/ LR16IPT08, Tunis, 1002, Tunisia
| | - Maram Morjen
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire des Venins et biomolécules thérapeutiques LR11IPT08/ LR16IPT08, Tunis, 1002, Tunisia
| | - Meriam Haoues
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire de Recherche sur la Transmission, le Contrôle et l'Immunobiologie des Infections, LR11IPT02/ LR16IPT02 LTCII, Tunis, 1002, Tunisia
| | - José Luis
- INSERM UMR 911-Centre de Recherche en Oncologie Biologique et Oncopharmacologie (CRO2), Aix-Marseille Université, 27 Bd Jean Moulin, 13385, Marseille Cedex 5, France
| | - Naziha Marrakchi
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire des Venins et biomolécules thérapeutiques LR11IPT08/ LR16IPT08, Tunis, 1002, Tunisia
| | - Khadija Essafi-Benkhadir
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Epidémiologie Moléculaire et Pathologie Expérimentale appliquée aux Maladies infectieuses LR11IPT04/LR16IPT04, Tunis, 1002, Tunisia
| | - Najet Srairi-Abid
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire des Venins et biomolécules thérapeutiques LR11IPT08/ LR16IPT08, Tunis, 1002, Tunisia.
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Hwang KS, Yang JY, Lee J, Lee YR, Kim SS, Kim GR, Chae JS, Ahn JH, Shin DS, Choi TY, Bae MA. A novel anti-melanogenic agent, KDZ-001, inhibits tyrosinase enzymatic activity. J Dermatol Sci 2017; 89:165-171. [PMID: 29191393 DOI: 10.1016/j.jdermsci.2017.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/26/2017] [Accepted: 11/14/2017] [Indexed: 01/06/2023]
Abstract
BACKGROUND The demand for anti-melanogenic agents is increasing due to the unwanted side effects of current treatments. To find an effective anti-melanogenic agent, we used zebrafish as a whole animal model for phenotype-based drug and cosmetic discovery screening. OBJECTIVES The aim of this study was to identify and explore a small molecule that could be used for skin-whitening cosmetics. METHODS Using zebrafish embryos, we examined the effects of 1000 compounds on zebrafish development and pigmentation. Pigmentation production was assessed by tyrosinase (TYR) enzymatic activity and melanin contents. Pigmentation marker expression in the human melanoma cell line HMV-II was analyzed by western blot. We also tested reconstituted human skin tissue and analyzed KDZ-001 with computational molecular modeling. RESULTS We identified three compounds that affected the pigmentation of developing melanophores in zebrafish. Among them, we identified KDZ-001, a novel anti-melanogenic agent, which strongly inhibits melanin synthesis in the developing melanophores of zebrafish, HMV-II cells, and reconstituted human skin with no toxicity. We found that KDZ-001 directly inhibits TYR enzymatic activity. Notably, computational molecular modeling of KDZ-001 suggested that its interaction with copper ions in the active site of TYR is essential for melanin synthesis, further demonstrating that KDZ-001 mainly acts as a TYR inhibitor to synthesize melanin. CONCLUSION KDZ-001 inhibits melanin synthesis and has a potential for use in skin-whitening cosmetics.
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Affiliation(s)
- Kyu-Seok Hwang
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Jung Yoon Yang
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Jooyun Lee
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Yu-Ri Lee
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Seong Soon Kim
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Geum Ran Kim
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Jin Sil Chae
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Jin Hee Ahn
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea.
| | - Dae-Seop Shin
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Tae-Young Choi
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea; Marine Biotechnology Research Division, National Marine Biodiversity institute of KOREA, Chungcheongnam-do 33662, Republic of Korea.
| | - Myung Ae Bae
- Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea; Department of Medical Chemistry and Pharmacology, University of Science & Technology, Daejeon, Republic of Korea.
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Lee S, Lee DH, Kim JC, Um BH, Sung SH, Jeong LS, Kim YK, Kim SN. Pectolinarigenin, an aglycone of pectolinarin, has more potent inhibitory activities on melanogenesis than pectolinarin. Biochem Biophys Res Commun 2017; 493:765-772. [DOI: 10.1016/j.bbrc.2017.08.106] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 08/26/2017] [Indexed: 10/19/2022]
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24
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Lin KY, Chen CM, Lu CY, Cheng CY, Wu YH. Regulation of miR-21 expression in human melanoma via UV-ray-induced melanin pigmentation. ENVIRONMENTAL TOXICOLOGY 2017; 32:2064-2069. [PMID: 28398611 DOI: 10.1002/tox.22421] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 03/10/2017] [Accepted: 03/19/2017] [Indexed: 06/07/2023]
Abstract
Excessive environmental ultraviolet (UV) radiation produces genetic mutations that can lead to skin cancer. This study was designed to assess the potential inhibitory activity of microRNA-21 (miR-21) on the UV irradiation-stimulated melanogenesis signal pathway in melanoma cells. The molecular mechanism of miR-21-induced inhibitory activity on UV-ray-stimulated melanogenesis-regulating proteins was examined in A375.S2 human melanoma and B16F10 mouse melanoma cells. UV irradiation for 30 min induced melanogenesis signal pathway by increasing melanin production and the number of A375.S2 cells. Similarly, UV radiation increased the expression of α-melanocyte-stimulating hormone (α-MSH) protein and decreased the melanogenesis-regulating signal, such as EGFR and Akt phosphorylation. Notably, miR-21 overexpression in UV-ray-stimulated A375.S2 cells decreased α-MSH expression and increased EGFR and Akt phosphorylation levels. Furthermore, miR-21 on UV-ray- induced melanogenesis was down-regulated by the Akt inhibitor and the EGFR inhibitor (Gefitinib). Results suggest that the suppressive activity of miR-21 on UV-ray-stimulated melanogenesis may involve the down-regulation of α-MSH and the activation in both of EGFR and Akt.
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Affiliation(s)
- Kuan-Yu Lin
- Department of Nursing, Central Taiwan University of Science and Technology, Taichung, 40601, Taiwan
- Graduate Institute of Biotechnology, Central Taiwan University of Science and Technology, Taichung, 40601, Taiwan
| | - Chien-Min Chen
- Division of Neurosurgery, Department of Surgery, Changhua Christian Hospital, Changhua, 50094, Taiwan
- School of Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
| | - Cheng-You Lu
- Graduate Institute of Biotechnology, Central Taiwan University of Science and Technology, Taichung, 40601, Taiwan
- Department of Neurology, Chang-Gung Memorial Hospital, Linkou, Taoyuan, 33305, Taiwan
| | - Chun-Yuan Cheng
- Division of Neurosurgery, Department of Surgery, Changhua Christian Hospital, Changhua, 50094, Taiwan
- School of Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
- Department of Biomedical Engineering, Chung Yuan Christian University, Taoyuan, 32023, Taiwan
| | - Yu-Hsin Wu
- Dermatology, Feng Yuan Hospital, Ministry of Health and Welfare, Taichung, 42055, Taiwan
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25
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Sample A, He YY. Autophagy in UV Damage Response. Photochem Photobiol 2017; 93:943-955. [PMID: 27935061 PMCID: PMC5466513 DOI: 10.1111/php.12691] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 10/22/2016] [Indexed: 12/14/2022]
Abstract
UV radiation exposure from sunlight and artificial tanning beds is the major risk factor for the development of skin cancer and skin photoaging. UV-induced skin damage can trigger a cascade of DNA damage response signaling pathways, including cell cycle arrest, DNA repair and, if damage is irreparable, apoptosis. Compensatory proliferation replaces the apoptotic cells to maintain skin barrier integrity. Disruption of these processes can be exploited to promote carcinogenesis by allowing the survival and proliferation of damaged cells. UV radiation also induces autophagy, a catabolic process that clears unwanted or damaged proteins, lipids and organelles. The mechanisms by which autophagy is activated following UV exposure, and the functions of autophagy in UV response, are only now being clarified. Here, we summarize the current understanding of the mechanisms governing autophagy regulation by UV, the roles of autophagy in regulating cellular response to UV-induced photodamage and the implications of autophagy modulation in the treatment and prevention of photoaging and skin cancer.
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Affiliation(s)
- Ashley Sample
- Department of Medicine, Section of Dermatology, University of Chicago, Chicago, IL
- Committee on Cancer Biology, University of Chicago, Chicago, IL
| | - Yu-Ying He
- Department of Medicine, Section of Dermatology, University of Chicago, Chicago, IL
- Committee on Cancer Biology, University of Chicago, Chicago, IL
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26
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Melanogenesis and DNA damage following photodynamic therapy in melanoma with two meso-substituted porphyrins. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 161:402-10. [DOI: 10.1016/j.jphotobiol.2016.06.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 06/06/2016] [Accepted: 06/07/2016] [Indexed: 12/31/2022]
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27
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The Development of Sugar-Based Anti-Melanogenic Agents. Int J Mol Sci 2016; 17:583. [PMID: 27092497 PMCID: PMC4849039 DOI: 10.3390/ijms17040583] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 04/12/2016] [Accepted: 04/14/2016] [Indexed: 01/16/2023] Open
Abstract
The regulation of melanin production is important for managing skin darkness and hyperpigmentary disorders. Numerous anti-melanogenic agents that target tyrosinase activity/stability, melanosome maturation/transfer, or melanogenesis-related signaling pathways have been developed. As a rate-limiting enzyme in melanogenesis, tyrosinase has been the most attractive target, but tyrosinase-targeted treatments still pose serious potential risks, indicating the necessity of developing lower-risk anti-melanogenic agents. Sugars are ubiquitous natural compounds found in humans and other organisms. Here, we review the recent advances in research on the roles of sugars and sugar-related agents in melanogenesis and in the development of sugar-based anti-melanogenic agents. The proposed mechanisms of action of these agents include: (a) (natural sugars) disturbing proper melanosome maturation by inducing osmotic stress and inhibiting the PI3 kinase pathway and (b) (sugar derivatives) inhibiting tyrosinase maturation by blocking N-glycosylation. Finally, we propose an alternative strategy for developing anti-melanogenic sugars that theoretically reduce melanosomal pH by inhibiting a sucrose transporter and reduce tyrosinase activity by inhibiting copper incorporation into an active site. These studies provide evidence of the utility of sugar-based anti-melanogenic agents in managing skin darkness and curing pigmentary disorders and suggest a future direction for the development of physiologically favorable anti-melanogenic agents.
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28
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Solano F. Photoprotectionversusphotodamage: updating an old but still unsolved controversy about melanin. POLYM INT 2016. [DOI: 10.1002/pi.5117] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- F Solano
- Department of Biochemistry and Molecular Biology B and Research Group for Molecular Control of Cell Proliferation, School of Medicine and IMIB; University of Murcia; 30100 Murcia Spain
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29
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Meghrajani CF, Co HS, Arcillas JG, Maaño CC, Cupino NA. A randomized, double-blind trial on the use of 1% hydrocortisone cream for the prevention of acute radiation dermatitis. Expert Rev Clin Pharmacol 2016; 9:483-91. [DOI: 10.1586/17512433.2016.1126506] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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30
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Ultraviolet Radiation-Induced Cytogenetic Damage in White, Hispanic and Black Skin Melanocytes: A Risk for Cutaneous Melanoma. Cancers (Basel) 2015; 7:1586-604. [PMID: 26287245 PMCID: PMC4586785 DOI: 10.3390/cancers7030852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 07/15/2015] [Accepted: 08/10/2015] [Indexed: 01/10/2023] Open
Abstract
Cutaneous Melanoma (CM) is a leading cause of cancer deaths, with reports indicating a rising trend in the incidence rate of melanoma among Hispanics in certain U.S. states. The level of melanin pigmentation in the skin is suggested to render photoprotection from the DNA-damaging effects of Ultraviolet Radiation (UVR). UVR-induced DNA damage leads to cytogenetic defects visualized as the formation of micronuclei, multinuclei and polymorphic nuclei in cells, and a hallmark of cancer risk. The causative relationship between Sun exposure and CM is controversial, especially in Hispanics and needs further evaluation. This study was initiated with melanocytes from White, Hispanic and Black neonatal foreskins which were exposed to UVR to assess their susceptibility to UVR-induced modulation of cellular growth, cytogenetic damage, intracellular and released melanin. Our results show that White and Hispanic skin melanocytes with similar levels of constitutive melanin are susceptible to UVR-induced cytogenetic damage, whereas Black skin melanocytes are not. Our data suggest that the risk of developing UVR-induced CM in a skin type is correlated with the level of cutaneous pigmentation and its ethnic background. This study provides a benchmark for further investigation on the damaging effects of UVR as risk for CM in Hispanics.
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31
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Cellular Mechanisms of Oxidative Stress and Action in Melanoma. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:481782. [PMID: 26064422 PMCID: PMC4438193 DOI: 10.1155/2015/481782] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 04/21/2015] [Indexed: 12/14/2022]
Abstract
Most melanomas occur on the skin, but a small percentage of these life-threatening cancers affect other parts of the body, such as the eye and mucous membranes, including the mouth. Given that most melanomas are caused by ultraviolet radiation (UV) exposure, close attention has been paid to the impact of oxidative stress on these tumors. The possibility that key epigenetic enzymes cannot act on a DNA altered by oxidative stress has opened new perspectives. Therefore, much attention has been paid to the alteration of DNA methylation by oxidative stress. We review the current evidence about (i) the role of oxidative stress in melanoma initiation and progression; (ii) the mechanisms by which ROS influence the DNA methylation pattern of transformed melanocytes; (iii) the transformative potential of oxidative stress-induced changes in global and/or local gene methylation and expression; (iv) the employment of this epimutation as a biomarker for melanoma diagnosis, prognosis, and drug resistance evaluation; (v) the impact of this new knowledge in clinical practice for melanoma treatment.
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32
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Abstract
Melanoma, the deadliest form of skin cancer, is an aggressive disease that is rising in incidence. Although melanoma is a historically treatment-resistant malignancy, in recent years unprecedented breakthroughs in targeted therapies and immunotherapies have revolutionized the standard of care for patients with advanced disease. Here, we provide an overview of recent developments in our understanding of melanoma risk factors, genomics, and molecular pathogenesis and how these insights have driven advances in melanoma treatment. In addition, we review benefits and limitations of current therapies and look ahead to continued progress in melanoma prevention and therapy. Remarkable achievements in the field have already produced a paradigm shift in melanoma treatment: Metastatic melanoma, once considered incurable, can now be treated with potentially curative rather than palliative intent.
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Affiliation(s)
- Jennifer A Lo
- Cutaneous Biology Research Center, Department of Dermatology and MGH Cancer Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - David E Fisher
- Cutaneous Biology Research Center, Department of Dermatology and MGH Cancer Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
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33
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Novel inhibitory effect of N-(2-hydroxycyclohexyl)valiolamine on melanin production in a human skin model. Int J Mol Sci 2014; 15:12188-95. [PMID: 25007819 PMCID: PMC4139837 DOI: 10.3390/ijms150712188] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/24/2014] [Accepted: 06/26/2014] [Indexed: 01/26/2023] Open
Abstract
Hyper-pigmentation causes skin darkness and medical disorders, such as post-inflammatory melanoderma and melasma. Therefore, the development of anti-melanogenic agents is important for treating these conditions and for cosmetic production. In our previous paper, we demonstrated that the anti-diabetic drug voglibose, a valiolamine derivative, is a potent anti-melanogenic agent. In addition, we proposed an alternative screening strategy to identify valiolamine derivatives with high skin permeability that act as anti-melanogenic agents when applied topically. In this study, we synthesized several valiolamine derivatives with enhanced lipophilicity and examined their inhibitory effects in a human skin model. N-(2-hydroxycyclohexyl)valiolamine (HV) possesses a stronger inhibitory effect on melanin production than voglibose in a human skin model, suggesting that HV is a more potent anti-melanogenic agent for the skin.
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34
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Melanins: Skin Pigments and Much More—Types, Structural Models, Biological Functions, and Formation Routes. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/498276] [Citation(s) in RCA: 277] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This review presents a general view of all types of melanin in all types of organisms. Melanin is frequently considered just an animal cutaneous pigment and is treated separately from similar fungal or bacterial pigments. Similarities concerning the phenol precursors and common patterns in the formation routes are discussed. All melanins are formed in a first enzymatically-controlled phase, generally a phenolase, and a second phase characterized by an uncontrolled polymerization of the oxidized intermediates. In that second phase, quinones derived from phenol oxidation play a crucial role. Concerning functions, all melanins show a common feature, a protective role, but they are not merely photoprotective pigments against UV sunlight. In pathogenic microorganisms, melanization becomes a virulence factor since melanin protects microbial cells from defense mechanisms in the infected host. In turn, some melanins are formed in tissues where sunlight radiation is not a potential threat. Then, their redox, metal chelating, or free radical scavenging properties are more important than light absorption capacity. These pigments sometimes behave as a double-edged sword, and inhibition of melanogenesis is desirable in different cells. Melanin biochemistry is an active field of research from dermatological, biomedical, cosmetical, and microbiological points of view, as well as fruit technology.
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35
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Denat L, Kadekaro AL, Marrot L, Leachman SA, Abdel-Malek ZA. Melanocytes as instigators and victims of oxidative stress. J Invest Dermatol 2014; 134:1512-1518. [PMID: 24573173 PMCID: PMC4418514 DOI: 10.1038/jid.2014.65] [Citation(s) in RCA: 229] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 01/08/2014] [Accepted: 01/15/2014] [Indexed: 12/30/2022]
Abstract
Epidermal melanocytes are particularly vulnerable to oxidative stress owing to the pro-oxidant state generated during melanin synthesis, and to the intrinsic antioxidant defenses that are compromised in pathologic conditions. Melanoma is thought to be oxidative stress driven, and melanocyte death in vitiligo is thought to be instigated by a highly pro-oxidant state in the epidermis. We review the current knowledge about melanin and the redox state of melanocytes, how paracrine factors help counteract oxidative stress, the role of oxidative stress in melanoma initiation and progression and in melanocyte death in vitiligo, and how this knowledge can be harnessed for melanoma and vitiligo treatment.
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Affiliation(s)
- Laurence Denat
- L'OREAL Research and Innovation, Aulnay-sous-Bois, France
| | - Ana L Kadekaro
- Department of Dermatology, University of Cincinnati, Cincinnati, Ohio, USA
| | - Laurent Marrot
- L'OREAL Research and Innovation, Aulnay-sous-Bois, France
| | - Sancy A Leachman
- Department of Dermatology, Oregon Health Sciences University, Portland, Oregon, USA
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36
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Bin BH, Seo J, Yang SH, Lee E, Choi H, Kim KH, Cho EG, Lee TR. Novel inhibitory effect of the antidiabetic drug voglibose on melanogenesis. Exp Dermatol 2014; 22:541-6. [PMID: 23879813 DOI: 10.1111/exd.12195] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2013] [Indexed: 12/18/2022]
Abstract
Overproduction of melanin can lead to medical disorders such as postinflammatory melanoderma and melasma. Therefore, developing antimelanogenic agents is important for both medical and cosmetic purposes. In this report, we demonstrated for the first time that the antidiabetic drug voglibose is a potent antimelanogenic agent. Voglibose is a representative antidiabetic drug possessing inhibitory activity towards human α-glucosidase; it blocked the proper N-glycan modification of tyrosinase, resulting in a dramatic reduction of the tyrosinase protein level by altering its stability and subsequently decreasing melanin production. Acarbose, another antihyperglycaemic drug that has a lower inhibitory effect on human intracellular α-glucosidase compared with voglibose, did not cause any changes in either the N-glycan modification of tyrosinase or the tyrosinase protein level, indicating that voglibose was the most efficient antimelanogenic agent among the widely used antihyperglycaemic agents. Considering that voglibose was originally selected from the valiolamine derivatives in a screen for an oral antidiabetic drug with a strong inhibitory activity towards intestinal α-glucosidase and low cell permeability, we propose an alternative strategy for screening compounds from valiolamine derivatives that show high inhibitory activity towards human intracellular α-glucosidases and high cell permeability, with the goal of obtaining antimelanogenic agents that are effective inside the cells.
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Affiliation(s)
- Bum-Ho Bin
- Bioscience Research Institute, AmorePacific Corporation R&D Center, Yongin, Korea
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37
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Seiberg M. Age-induced hair greying - the multiple effects of oxidative stress. Int J Cosmet Sci 2013; 35:532-8. [PMID: 24033376 DOI: 10.1111/ics.12090] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 08/20/2013] [Indexed: 01/14/2023]
Abstract
An obvious sign of ageing is hair greying, or the loss of pigment production and deposition within the hair shafts. Numerous mechanisms, acting at different levels and follicular locations, contribute to hair greying, ranging from melanocyte stem cells defects to follicular melanocyte death. One key issue that is in common to these processes is oxidative damage. At the hair follicle stem cells niche, oxidative stress, accelerated by B-cell lymphoma 2 gene (BCL-2) depletion, leads to selective apoptosis and diminution of melanocyte stem cells, reducing the repopulation of newly formed anagen follicles. Melanotic bulbar melanocytes express high levels of BCL-2 to enable survival from melanogenesis- and ultraviolet A (UVA)-induced reactive oxygen species (ROS) attacks. With ageing, the bulbar melanocyte expression of anti-oxidant proteins such as BCL-2, and possibly TRP-2, is reduced, and the dedicated enzymatic anti-oxidant defence system throughout the follicle weakens, resulting in enhanced oxidative stress. A marked reduction in catalase expression and activity results in millimolar accumulation of hydrogen peroxide, contributing to bulbar melanocyte malfunction and death. Interestingly, amelanotic melanocytes at the outer root sheath (ORS) are somewhat less affected by these processes and survive for longer time even within the white, ageing hair follicles. Better understanding of the overtime susceptibility of melanocytes to oxidative stress at the different follicular locations might yield clues to possible therapies for the prevention and reversal of hair greying.
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Affiliation(s)
- M Seiberg
- Seiberg Consulting, LLC, Princeton, NJ, USA
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Kleszczyński K, Tukaj S, Kruse N, Zillikens D, Fischer TW. Melatonin prevents ultraviolet radiation-induced alterations in plasma membrane potential and intracellular pH in human keratinocytes. J Pineal Res 2013; 54:89-99. [PMID: 22856627 DOI: 10.1111/j.1600-079x.2012.01028.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 06/22/2012] [Indexed: 12/13/2022]
Abstract
Melatonin exhibits protective effects against ultraviolet radiation (UVR) via modulation of proinflammatory mediators and its free radical scavenging capacity. To date, several reports presented protective mechanisms of this agent against UVR-induced alterations in mitochondria and nuclei. This investigation evaluates the potent preventing action of melatonin regarding early-stage UVR-mediated perturbations in plasma membrane potential (mbΔψ) and intracellular (cytosolic) pH (pH i) analyzed by flow cytometry. Experiments were carried out in a dose- and time-dependent manner using human keratinocytes [HaCaT and normal human epidermal keratinocytes (NHEK)]. First investigations, which used viability/cytotoxicity assays, showed the gradual mortality with increasing UVR doses and cultivation time. Pre-incubation with melatonin (10(-3) m) prior to UVR exposure reduced lactate dehydrogenase release by 30% (HaCaT) and 28% (NHEK) at the dose of 50 mJ/cm(2) after 48 hr (P < 0.001). Furthermore, UVR caused hyperpolarization of mbΔψ immediately (0 hr) after irradiation (25 or 50 mJ/cm(2)). At the dose of 50 mJ/cm(2), cells cultivated for 48 hr manifested a marked increase in mbΔψ by 112% (HaCaT) and 123% (NHEK). The presence of melatonin significantly protected the cells by 12% (HaCaT) and 14% (NHEK) (P < 0.001). Simultaneously, 50 mJ/cm(2) induced dramatic acidification reaching after 24 hr the level of 6.40 (without melatonin), 6.56 (with melatonin) for HaCaT and 6.11 (without melatonin), 6.43 (with melatonin) for NHEK. The results presented provide information about the protective mechanisms of melatonin itself on one hand and, combined with data reported so far, confirm the potent antiapoptotic action of melatonin.
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Noonan FP, Zaidi MR, Wolnicka-Glubisz A, Anver MR, Bahn J, Wielgus A, Cadet J, Douki T, Mouret S, Tucker MA, Popratiloff A, Merlino G, De Fabo EC. Melanoma induction by ultraviolet A but not ultraviolet B radiation requires melanin pigment. Nat Commun 2012; 3:884. [PMID: 22673911 PMCID: PMC3621412 DOI: 10.1038/ncomms1893] [Citation(s) in RCA: 192] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 05/08/2012] [Indexed: 11/09/2022] Open
Abstract
Malignant melanoma of the skin (CMM) is associated with ultraviolet radiation exposure, but the mechanisms and even the wavelengths responsible are unclear. Here we use a mammalian model to investigate melanoma formed in response to precise spectrally defined ultraviolet wavelengths and biologically relevant doses. We show that melanoma induction by ultraviolet A (320-400 nm) requires the presence of melanin pigment and is associated with oxidative DNA damage within melanocytes. In contrast, ultraviolet B radiation (280-320 nm) initiates melanoma in a pigment-independent manner associated with direct ultraviolet B DNA damage. Thus, we identified two ultraviolet wavelength-dependent pathways for the induction of CMM and describe an unexpected and significant role for melanin within the melanocyte in melanomagenesis.
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Affiliation(s)
- Frances P. Noonan
- Laboratory of Photobiology and Photoimmunology, Department of Microbiology, Immunology and Tropical Medicine, School of Medicine and Health Sciences, The George Washington University, Washington, District of Columbia 20037, USA
| | - M. Raza Zaidi
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, NIH, Bethesda, Maryland 20892, USA
| | - Agnieszka Wolnicka-Glubisz
- Laboratory of Photobiology and Photoimmunology, Department of Microbiology, Immunology and Tropical Medicine, School of Medicine and Health Sciences, The George Washington University, Washington, District of Columbia 20037, USA
- Present address: Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, Krakow 30-348, Poland (A.W.-G.)
| | - Miriam R. Anver
- Pathology/Histotechnology Laboratory, SAIC-Frederick, National Cancer Institute-Frederick, Frederick, Maryland 21702, USA
| | - Jesse Bahn
- Laboratory of Photobiology and Photoimmunology, Department of Microbiology, Immunology and Tropical Medicine, School of Medicine and Health Sciences, The George Washington University, Washington, District of Columbia 20037, USA
| | - Albert Wielgus
- Laboratory of Pharmacology, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, USA
- Present address: Duke Eye Center, 2351 Erwin Road, Durham, North Carolina 27705, USA (A.W.)
| | - Jean Cadet
- DSM/INAC/SCIB UMR-E 3 CEA/UJF FRE CNRS 3200/Laboratoire 'Lésions des Acides Nucléiques', CEA-Grenoble 38054, France
| | - Thierry Douki
- DSM/INAC/SCIB UMR-E 3 CEA/UJF FRE CNRS 3200/Laboratoire 'Lésions des Acides Nucléiques', CEA-Grenoble 38054, France
| | - Stephane Mouret
- DSM/INAC/SCIB UMR-E 3 CEA/UJF FRE CNRS 3200/Laboratoire 'Lésions des Acides Nucléiques', CEA-Grenoble 38054, France
- Present address: Department of Toxicology and Chemical Risk, Army Institute for Biomedical Research, La Tronche 38700, France (S.M.)
| | - Margaret A. Tucker
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, Maryland 20892, USA
| | - Anastas Popratiloff
- Center for Microscopy and Image Analysis, Office of the Vice-President, The George Washington University, Washington, District of Columbia 20037, USA
| | - Glenn Merlino
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, NIH, Bethesda, Maryland 20892, USA
| | - Edward C. De Fabo
- Laboratory of Photobiology and Photoimmunology, Department of Microbiology, Immunology and Tropical Medicine, School of Medicine and Health Sciences, The George Washington University, Washington, District of Columbia 20037, USA
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Swalwell H, Latimer J, Haywood RM, Birch-Machin MA. Investigating the role of melanin in UVA/UVB- and hydrogen peroxide-induced cellular and mitochondrial ROS production and mitochondrial DNA damage in human melanoma cells. Free Radic Biol Med 2012; 52:626-634. [PMID: 22178978 DOI: 10.1016/j.freeradbiomed.2011.11.019] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 11/08/2011] [Accepted: 11/14/2011] [Indexed: 11/29/2022]
Abstract
Skin cancer incidence is dramatically increasing worldwide, with exposure to ultraviolet radiation (UVR) a predominant factor. The UVA component initiates oxidative stress in human skin, although its exact role in the initiation of skin cancer, particularly malignant melanoma, remains unclear and is controversial because there is evidence for a melanin-dependent mechanism in UVA-linked melanoma studies. Nonpigmented (CHL-1, A375), moderately pigmented (FM55, SKmel23), and highly pigmented (FM94, hyperpigmented FM55) human melanoma cell lines have been used to investigate UVA-induced production of reactive oxygen species using FACS analysis, at both the cellular (dihydrorhodamine-123) and the mitochondrial (MitoSOX) level, where most cellular stress is generated. For the first time, downstream mtDNA damage (utilizing a quantitative long-PCR assay) has been investigated. Using UVA, UVB, and H(2)O(2) as cellular stressors, we have explored the dual roles of melanin as a photoprotector and photosensitizer. The presence of melanin has no influence over cellular oxidative stress generation, whereas, in contrast, melanin protects against mitochondrial superoxide generation and mtDNA damage (one-way ANOVA with post hoc Tukey's analysis, P<0.001). We show that if melanin binds directly to DNA, it acts as a direct photosensitizer of mtDNA damage during UVA irradiation (P<0.001), providing evidence for the dual roles of melanin.
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Affiliation(s)
- Helen Swalwell
- Department of Dermatological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Jennifer Latimer
- Department of Dermatological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Rachel M Haywood
- RAFT Leopold Muller Building, Mount Vernon Hospital, Northwood, Middlesex HA6 2RN, UK
| | - Mark A Birch-Machin
- Department of Dermatological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK.
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Sage E, Girard PM, Francesconi S. Unravelling UVA-induced mutagenesis. Photochem Photobiol Sci 2012; 11:74-80. [DOI: 10.1039/c1pp05219e] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Effect of novel marine nutraceuticals on IL-1α-mediated TNF-α release from UVB-irradiated human melanocyte-derived cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2011; 2011:728645. [PMID: 21961050 PMCID: PMC3179886 DOI: 10.1155/2011/728645] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 07/15/2011] [Accepted: 07/26/2011] [Indexed: 01/20/2023]
Abstract
UV-induced inflammation and reactive oxygen species formation are involved in the development of melanoma. Natural products like 5β-scymnol and CO2-supercritical fluid extract (CO2-SFE) of mussel oil contain anti-inflammatory and antioxidant properties that may aid in reducing the deleterious effects of UV radiation. Therefore, their effect on the release of the proinflammatory cytokine, tumour necrosis factor-α (TNF-α), from UVB-irradiated human melanocytic cells was examined. Human epidermal melanocytes (HEM) and MM96L melanoma cells were exposed to UVB radiation and IL-1α. Cell viability and TNF-α levels were determined 24 hours after-irradiation while p38 mitogen-activated protein kinase (MAPK) activation was observed at 15 min after-irradiation. When α-tocopherol, CO2-SFE mussel oil, and 5β-scymnol were added to the UVB-irradiated HEM cells treated with IL-1α, TNF-α levels fell by 53%, 65%, and 76%, respectively, while no inhibition was evident in MM96L cells. This effect was not due to inhibition of the intracellular p38 MAPK signalling pathway. These compounds may be useful in preventing inflammation-induced damage to normal melanocytes.
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Haywood R, Andrady C, Kassouf N, Sheppard N. Intensity-dependent Direct Solar Radiation- and UVA-induced Radical Damage to Human Skin and DNA, Lipids and Proteins. Photochem Photobiol 2010; 87:117-30. [DOI: 10.1111/j.1751-1097.2010.00850.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Melanocytes are deficient in repair of oxidative DNA damage and UV-induced photoproducts. Proc Natl Acad Sci U S A 2010; 107:12180-5. [PMID: 20566850 DOI: 10.1073/pnas.1005244107] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Melanomas occur mainly in sunlight-exposed skin. Xeroderma pigmentosum (XP) patients have 1,000-fold higher incidence of melanoma, suggesting that sunlight-induced "bulky" photoproducts are responsible for melanomagenesis. Sunlight induces a high level of reactive oxygen species in melanocytes (MCs); oxidative DNA damage (ODD) may thus also contribute to melanomagenesis, and XP gene products may participate in the repair of ODD. We examined the effects of melanin on UVA (320-400 nm) irradiation-induced ODD and UV photoproducts and the repair capacity in MC and XP cells for ODD and UV-induced photoproducts. Our findings indicate that UVA irradiation induces a significantly higher amount of formamidopyrimidine glycosylase-sensitive ODD in MCs than in normal human skin fibroblasts (NHSFs). In contrast, UVA irradiation induces an insignificant amount of UvrABC-sensitive sites in either of these two types of cells. We also found that, compared to NHSFs, MCs have a reduced repair capacity for ODD and photoproducts; H(2)O(2) modified- and UVC-irradiated DNAs induce a higher mutation frequency in MCs than in NHSFs; and, XP complementation group A (XPA), XP complementation group C, and XP complementation group G cells are deficient in ODD repair and ODD induces a higher mutation frequency in XPA cells than in NHSFs. These results suggest that: (i) melanin sensitizes UVA in the induction of ODD but not bulky UV photoproducts; (ii) the high susceptibility to UVA-induced ODD and the reduced DNA repair capacity in MCs contribute to carcinogenesis; and (iii) the reduced repair capacity for ODD contributes to the high melanoma incidence in XP patients.
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Wang A, Marino AR, Gasyna EM, Sarna T, Norris JR. Investigation of photoexcited states in porcine eumelanin through their transient radical products. J Phys Chem B 2009; 113:10480-2. [PMID: 19572671 DOI: 10.1021/jp905417w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Time-resolved electron paramagnetic resonance was used to monitor the photochemistry of radical pairs from melanin in porcine retinal pigment epithelial cells on the sub-microsecond time scale. Two distinct signals were found: one of enhanced absorption/emission at early times and one mostly emissive at later times. The emissive character of the longer lived feature suggests participation of an excited triplet precursor, something not generally thought to exist in melanins. The radicals in the early time signal were separated by about 21 A and those in the later time signal were separated by about 22-24 A.
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Affiliation(s)
- Alice Wang
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, USA
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46
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Profiling the Response of Human Hair Follicles to Ultraviolet Radiation. J Invest Dermatol 2009; 129:1790-804. [DOI: 10.1038/jid.2008.418] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Panich U, Kongtaphan K, Onkoksoong T, Jaemsak K, Phadungrakwittaya R, Thaworn A, Akarasereenont P, Wongkajornsilp A. Modulation of antioxidant defense by Alpinia galanga and Curcuma aromatica extracts correlates with their inhibition of UVA-induced melanogenesis. Cell Biol Toxicol 2009; 26:103-16. [DOI: 10.1007/s10565-009-9121-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Accepted: 02/27/2009] [Indexed: 11/30/2022]
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Abstract
Human skin is repeatedly exposed to UVR that influences the function and survival of many cell types and is regarded as the main causative factor in the induction of skin cancer. It has been traditionally believed that skin pigmentation is the most important photoprotective factor, as melanin, besides functioning as a broadband UV absorbent, has antioxidant and radical scavenging properties. Besides, many epidemiological studies have shown a lower incidence for skin cancer in individuals with darker skin compared to those with fair skin. Skin pigmentation is of great cultural and cosmetic importance, yet the role of melanin in photoprotection is still controversial. This article outlines the major acute and chronic effects of UVR on human skin, the properties of melanin, the regulation of pigmentation and its effect on skin cancer prevention.
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Affiliation(s)
- Michaela Brenner
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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49
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Haywood R, Rogge F, Lee M. Protein, lipid, and DNA radicals to measure skin UVA damage and modulation by melanin. Free Radic Biol Med 2008; 44:990-1000. [PMID: 18160051 DOI: 10.1016/j.freeradbiomed.2007.11.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Revised: 11/14/2007] [Accepted: 11/21/2007] [Indexed: 01/22/2023]
Abstract
Afro-Caribbeans have a lower incidence of skin cancer than Caucasians, but the effectiveness of melanin as a photoprotective pigment is debated. We investigated the UVA and solar irradiation of ex vivo human skin and DMPO using electron spin resonance spectroscopy, to determine whether pigmented skin is protected by melanin against free radical damage. Initial ascorbate radicals in Caucasian skin were superseded by lipid and/or protein radical adducts with isotropic (a(H)=1.8 mT) and anisotropic spectra comparable to spectra in irradiated pig fat (a(H)=1.9 mT) and BSA. DNA carbon-centered radical adducts (a(H)=2.3 mT) and a broad singlet were detected in genomic DNA/melanin but were not distinguishable in irradiated Caucasian skin. Protein and lipid radicals (n=6 in Caucasian skin) were minimal in Afro-Caribbean skin (n=4) and intermediate skin pigmentations were variable (n=3). In irradiated Afro-Caribbean skin a shoulder to the melanin radical (also in UVA-irradiated pigmented melanoma cells and genomic DNA/melanin and intrinsic to pheomelanin) was detected. In this sample group, protein (but not lipid) radical adducts decreased directly with pigmentation. ESR/spin trapping methodology has potential for screening skin susceptibility to aging and cancer-related radical damage and for measuring protection afforded by melanin, sunscreens, and antiaging creams.
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Affiliation(s)
- Rachel Haywood
- RAFT Institute of Plastic Surgery, Mount Vernon Hospital, Northwood, Middlesex HA6 2RN, UK.
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50
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Das S, Chattopadhyay R, Bhakat KK, Boldogh I, Kohno K, Prasad R, Wilson SH, Hazra TK. Stimulation of NEIL2-mediated oxidized base excision repair via YB-1 interaction during oxidative stress. J Biol Chem 2007; 282:28474-28484. [PMID: 17686777 PMCID: PMC2679419 DOI: 10.1074/jbc.m704672200] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The recently characterized enzyme NEIL2 (Nei-like-2), one of the four oxidized base-specific DNA glycosylases (OGG1, NTH1, NEIL1, and NEIL2) in mammalian cells, has poor base excision activity from duplex DNA. To test the possibility that one or more proteins modulate its activity in vivo, we performed mass spectrometric analysis of the NEIL2 immunocomplex and identified Y box-binding (YB-1) protein as a stably interacting partner of NEIL2. We show here that YB-1 not only interacts physically with NEIL2, but it also cooperates functionally by stimulating its base excision activity by 7-fold. Moreover, YB-1 interacts with the other NEIL2-associated BER proteins, namely, DNA ligase III alpha and DNA polymerase beta and thus could form a large multiprotein complex. YB-1, normally present in the cytoplasm, translocates to the nucleus during UVA-induced oxidative stress, concomitant with its increased association with and activation of NEIL2. NEIL2-initiated base excision activity is significantly reduced in YB-1-depleted cells. YB-1 thus appears to have a novel regulatory role in NEIL2-mediated repair under oxidative stress.
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Affiliation(s)
- Soumita Das
- Sealy Center for Molecular Medicine and Departments of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Ranajoy Chattopadhyay
- Sealy Center for Molecular Medicine and Departments of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Kishor K Bhakat
- Sealy Center for Molecular Medicine and Departments of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Istvan Boldogh
- Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Kimitoshi Kohno
- Department of Molecular Biology, University of Occupational and Environmental Health School of Medicine, Iseigaoka, Kitakyushu, Japan
| | - Rajendra Prasad
- Laboratory of Structural Biology, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Samuel H Wilson
- Laboratory of Structural Biology, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Tapas K Hazra
- Sealy Center for Molecular Medicine and Departments of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas 77555.
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