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Min Y, Li Q, Yu H, Kong L, Liu S. Comparative transcriptome elucidates key genes and pathways related to golden phenotype of Crassostrea gigas. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2024; 49:101197. [PMID: 38295536 DOI: 10.1016/j.cbd.2024.101197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/22/2024] [Accepted: 01/22/2024] [Indexed: 02/02/2024]
Abstract
Marine bivalves are economically important and exhibit a remarkable diversity in shell color. The Pacific oyster Crassostrea gigas stands out as an important economic species, with the successful development of four distinct color strains through selective breeding. While previous studies have shed light on the genetic mechanism underlying color segregation, the precise molecular regulatory mechanisms responsible for shell coloration in oysters remains elusive. In this study, we confirmed that the golden phenotype is primarily attributed to pheomelanin by histological and ultrastructural observations. Additionally, we conducted a comparative transcriptome analysis of the black and golden shell color oysters to explore the potential genes and pathways contributing to the golden phenotype in C. gigas. Our results revealed a significant increase in differentially expressed genes in the golden phenotype associated with pathways such as glutathione metabolism, and calcium signaling pathway, suggesting a potential role in the synthesis of pheomelanin. Of particular note, we highlighted the potential role of two-pore channel 2 (TPC2) in modulating tyrosinase activity and melanosomal pH, ultimately determining the shade of pigmentation. Our study in this work provided a preliminary exploration of the mechanism, shedding light on the melanosome microenvironment and shell color.
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Affiliation(s)
- Yue Min
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Ocean University of China, Qingdao 266003, China; College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Qi Li
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Ocean University of China, Qingdao 266003, China; College of Fisheries, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
| | - Hong Yu
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Ocean University of China, Qingdao 266003, China; College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Lingfeng Kong
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Ocean University of China, Qingdao 266003, China; College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Shikai Liu
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Ocean University of China, Qingdao 266003, China; College of Fisheries, Ocean University of China, Qingdao 266003, China
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Purswani JM, Bigham Z, Adotama P, Oh C, Xiao J, Maisonet O, Teruel JR, Gutierrez D, Tattersall IW, Perez CA, Gerber NK. Risk of Radiation Dermatitis in Patients With Skin of Color Who Undergo Radiation to the Breast or Chest Wall With and Without Regional Nodal Irradiation. Int J Radiat Oncol Biol Phys 2023; 117:468-478. [PMID: 37060928 DOI: 10.1016/j.ijrobp.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/20/2023] [Accepted: 04/06/2023] [Indexed: 04/17/2023]
Abstract
PURPOSE Acute radiation dermatitis (ARD) is common after radiation therapy for breast cancer, with data indicating that ARD may disproportionately affect Black or African American (AA) patients. We evaluated the effect of skin of color (SOC) on physician-reported ARD in patients treated with radiation therapy. METHODS AND MATERIALS We identified patients treated with whole breast or chest wall ± regional nodal irradiation or high tangents using 50 Gy in 25 fractions from 2015 to 2018. Baseline skin pigmentation was assessed using the Fitzpatrick scale (I = light/pale white to VI = black/very dark brown) with SOC defined as Fitzpatrick scale IV to VI. We evaluated associations among SOC, physician-reported ARD, late hyperpigmentation, and use of oral and topical treatments for RD using multivariable models. RESULTS A total of 325 patients met eligibility, of which 40% had SOC (n = 129). On multivariable analysis, Black/AA race and chest wall irradiation had a lower odds of physician-reported grade 2 or 3 ARD (odds ratio [OR], 0.110; 95% confidence interval [CI], 0.030-0.397; P = .001; OR, 0.377; 95% CI, 0.161-0.883; P = .025), whereas skin bolus (OR, 8.029; 95% CI, 3.655-17.635; P = 0) and planning target volume D0.03cc (OR, 1.001; 95% CI, 1.000-1.001; P = .028) were associated with increased odds. On multivariable analysis, SOC (OR, 3.658; 95% CI, 1.236-10.830; P = .019) and skin bolus (OR, 26.786; 95% CI, 4.235-169.432; P = 0) were associated with increased odds of physician-reported late grade 2 or 3 hyperpigmentation. There was less frequent use of topical steroids to treat ARD and more frequent use of oral analgesics in SOC versus non-SOC patients (43% vs 63%, P < .001; 50% vs 38%, P = .05, respectively). CONCLUSIONS Black/AA patients exhibited lower odds of physician-reported ARD. However, we found higher odds of late hyperpigmentation in SOC patients, independent of self-reported race. These findings suggest that ARD may be underdiagnosed in SOC when using the physician-rated scale despite this late evidence of radiation-induced skin toxicity.
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Affiliation(s)
- Juhi M Purswani
- Department of Radiation Oncology, New York University Langone Health and Perlmutter Cancer Center, New York, New York
| | - Zahna Bigham
- Tufts University Graduate School of Biomedical Sciences, Boston, Massachusetts
| | - Prince Adotama
- Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, New York
| | - Cheongeun Oh
- Department of Population Health, New York University Langone Health and Perlmutter Cancer Center, New York, New York
| | - Julie Xiao
- Department of Radiation Oncology, New York University Langone Health and Perlmutter Cancer Center, New York, New York
| | - Olivier Maisonet
- Department of Radiation Oncology, New York University Langone Health and Perlmutter Cancer Center, New York, New York
| | - Jose R Teruel
- Department of Radiation Oncology, New York University Langone Health and Perlmutter Cancer Center, New York, New York
| | - Daniel Gutierrez
- Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, New York
| | - Ian W Tattersall
- Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, New York
| | - Carmen A Perez
- Department of Radiation Oncology, New York University Langone Health and Perlmutter Cancer Center, New York, New York
| | - Naamit K Gerber
- Department of Radiation Oncology, New York University Langone Health and Perlmutter Cancer Center, New York, New York.
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Cilla S, Romano C, Macchia G, Boccardi M, Pezzulla D, Buwenge M, Castelnuovo AD, Bracone F, Curtis AD, Cerletti C, Iacoviello L, Donati MB, Deodato F, Morganti AG. Machine-learning prediction model for acute skin toxicity after breast radiation therapy using spectrophotometry. Front Oncol 2023; 12:1044358. [PMID: 36686808 PMCID: PMC9853396 DOI: 10.3389/fonc.2022.1044358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/08/2022] [Indexed: 01/09/2023] Open
Abstract
Purpose Radiation-induced skin toxicity is a common and distressing side effect of breast radiation therapy (RT). We investigated the use of quantitative spectrophotometric markers as input parameters in supervised machine learning models to develop a predictive model for acute radiation toxicity. Methods and materials One hundred twenty-nine patients treated for adjuvant whole-breast radiotherapy were evaluated. Two spectrophotometer variables, i.e. the melanin (IM) and erythema (IE) indices, were used to quantitatively assess the skin physical changes. Measurements were performed at 4-time intervals: before RT, at the end of RT and 1 and 6 months after the end of RT. Together with clinical covariates, melanin and erythema indices were correlated with skin toxicity, evaluated using the Radiation Therapy Oncology Group (RTOG) guidelines. Binary group classes were labeled according to a RTOG cut-off score of ≥ 2. The patient's dataset was randomly split into a training and testing set used for model development/validation and testing (75%/25% split). A 5-times repeated holdout cross-validation was performed. Three supervised machine learning models, including support vector machine (SVM), classification and regression tree analysis (CART) and logistic regression (LR), were employed for modeling and skin toxicity prediction purposes. Results Thirty-four (26.4%) patients presented with adverse skin effects (RTOG ≥2) at the end of treatment. The two spectrophotometric variables at the beginning of RT (IM,T0 and IE,T0), together with the volumes of breast (PTV2) and boost surgical cavity (PTV1), the body mass index (BMI) and the dose fractionation scheme (FRAC) were found significantly associated with the RTOG score groups (p<0.05) in univariate analysis. The diagnostic performances measured by the area-under-curve (AUC) were 0.816, 0.734, 0.714, 0.691 and 0.664 for IM, IE, PTV2, PTV1 and BMI, respectively. Classification performances reported precision, recall and F1-values greater than 0.8 for all models. The SVM classifier using the RBF kernel had the best performance, with accuracy, precision, recall and F-score equal to 89.8%, 88.7%, 98.6% and 93.3%, respectively. CART analysis classified patients with IM,T0 ≥ 99 to be associated with RTOG ≥ 2 toxicity; subsequently, PTV1 and PTV2 played a significant role in increasing the classification rate. The CART model provided a very high diagnostic performance of AUC=0.959. Conclusions Spectrophotometry is an objective and reliable tool able to assess radiation induced skin tissue injury. Using a machine learning approach, we were able to predict grade RTOG ≥2 skin toxicity in patients undergoing breast RT. This approach may prove useful for treatment management aiming to improve patient quality of life.
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Affiliation(s)
- Savino Cilla
- Medical Physics Unit, Gemelli Molise Hospital, Campobasso, Italy,*Correspondence: Savino Cilla, ;
| | - Carmela Romano
- Medical Physics Unit, Gemelli Molise Hospital, Campobasso, Italy
| | | | | | - Donato Pezzulla
- Radiation Oncology Unit, Gemelli Molise Hospital, Campobasso, Italy
| | - Milly Buwenge
- Radiation Oncology, Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS) Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | | | - Francesca Bracone
- Department of Epidemiology and Prevention, IRCCS Neuromed, Pozzilli, Italy
| | - Amalia De Curtis
- Department of Epidemiology and Prevention, IRCCS Neuromed, Pozzilli, Italy
| | - Chiara Cerletti
- Department of Epidemiology and Prevention, IRCCS Neuromed, Pozzilli, Italy
| | - Licia Iacoviello
- Department of Epidemiology and Prevention, IRCCS Neuromed, Pozzilli, Italy,Department of Medicine and Surgery, Research Center in Epidemiology and Preventive Medicine (EPIMED), University of Insubria, Varese, Italy
| | | | - Francesco Deodato
- Radiation Oncology Unit, Gemelli Molise Hospital, Campobasso, Italy,Istituto di Radiologia, Universitá Cattolica del Sacro Cuore, Rome, Italy
| | - Alessio Giuseppe Morganti
- Radiation Oncology, Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS) Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy,Department of Experimental, Diagnostic, and Specialty Medicine - DIMES, Alma Mater Studiorum Bologna University, Bologna, Italy
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Kim M, Lim KM. Melanocytotoxic chemicals and their toxic mechanisms. Toxicol Res 2022; 38:417-435. [PMID: 36277364 PMCID: PMC9532501 DOI: 10.1007/s43188-022-00144-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/22/2022] [Accepted: 06/27/2022] [Indexed: 10/15/2022] Open
Abstract
Melanocyte cell death can lead to various melanocyte-related skin diseases including vitiligo and leukoderma. Melanocytotoxic chemicals are one of the most well-known causes of nongenetic melanocyte-related diseases, which induce melanocyte cell death through apoptosis. Various chemicals used in cosmetics, medicine, industry and food additives are known to induce melanocyte cell death, which poses a significant risk to the health of consumers and industrial workers. This review summarizes recently reported melanocytotoxic chemicals and their mechanisms of toxicity in an effort to provide insight into the development of safer chemicals.
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Affiliation(s)
- Minjeong Kim
- College of Pharmacy, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760 Republic of Korea
| | - Kyung-Min Lim
- College of Pharmacy, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760 Republic of Korea
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Alnemari RM, Brüßler J, Keck CM. Assessing the Oxidative State of the Skin by Combining Classical Tape Stripping with ORAC Assay. Pharmaceuticals (Basel) 2022; 15:ph15050520. [PMID: 35631347 PMCID: PMC9146784 DOI: 10.3390/ph15050520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 12/31/2022] Open
Abstract
The antioxidant barrier system of the skin acts as the main defence against environmental pro-oxidants. Impaired skin oxidative state is linked to unhealthy conditions such as skin autoimmune diseases and cancer. Thus, the evaluation of the overall oxidative state of the skin plays a key role in further understanding and prevention of these disorders. This study aims to present a novel ex vivo model to evaluate the skin oxidative state by the measurement of its antioxidant capacity (AOC). For this the ORAC assay was combined with classical tape stripping and infrared densitometry to evaluate the oxidative state of the stratum corneum (SC). Outcomes implied the suitability of the used model to determine the intrinsic antioxidant capacity (iAOC) of the skin. The average iAOC of untreated skin was determined as 140 ± 7.4 µM TE. Skin exposure to UV light for 1 h reduced the iAOC by about 17%, and exposure for 2 h decreased the iAOC by about 30%. Treatment with ascorbic acid (AA) increased the iAOC in a dose-dependent manner and reached an almost two-fold iAOC when 20% AA solution was applied on the skin. The application of coenzyme Q10 resulted in an increase in the iAOC at low doses but decreased the iAOC when doses > 1% were applied on the skin. The results show that the combination of classical tape stripping and ORAC assay is a cost-effective and versatile method to evaluate the skin oxidative state and the pro-oxidate and antioxidative effects of topical skin treatments on the iAOC of the skin. Therefore, the model can be considered to be a valuable tool in skin research.
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Lien KH, Ger TY, Chi CC. Association of vitiligo with high-frequency sensorineural hearing loss: a systematic review and meta-analysis. J Eur Acad Dermatol Venereol 2021; 36:373-379. [PMID: 34779053 DOI: 10.1111/jdv.17815] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 10/14/2021] [Indexed: 12/31/2022]
Abstract
The association between vitiligo and hearing loss has been noted but the specific frequencies and degrees of hearing impairment remain unclear. The objective of this systematic review was to investigate the relationship between vitiligo and hearing thresholds at various specific frequencies. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. We searched MEDLINE and Embase for relevant studies from inception to 10th April 2021. Case-control studies, cross-sectional, or cohort studies that compared the frequency-specific hearing thresholds between vitiligo patients and age-matched non-vitiligo controls were included. There were neither language nor geographic limitations. We used the Newcastle-Ottawa Scale to assess the risk of bias of included studies. The DerSimonian and Laird random-effects model was utilized in meta-analyses due to expected clinical heterogeneity. We included 9 case-control studies with 371 vitiligo patients and 349 controls, which were rated with low or unclear risk. We found neither relevant cross-sectional nor cohort studies. The meta-analysis showed that when compared with controls, vitiligo patients had significantly higher pure-tone hearing thresholds at 2000, 4000, and 8000 Hz. In conclusions, vitiligo patients are prone to high-frequency sensorineural hearing loss.
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Affiliation(s)
- K-H Lien
- Division of Otology, Department of Otolaryngology Head and Neck Surgery, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.,Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan.,School of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - T-Y Ger
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.,Graduate Institute of Biomedical Engineering, College of Engineering, Chang Gung University, Taoyuan, Taiwan
| | - C-C Chi
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.,School of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
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Ammanagi A, C T S, R K, Badiger A, Ramaraj V. Functional and Structural Characterization of Melanin from Brevibacillus invocatus Strain IBA. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2021; 500:159-169. [PMID: 34731382 DOI: 10.1134/s001249662105001x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 11/23/2022]
Abstract
Melanin is a polyphenol or indolic dark brown to black pigment of macromolecules that has a variety of biological functions including UV defence, desiccation, and oxidation. The pigment is classified as a heterogenic polymer. Analytical characterization of melanin can be difficult due to its heterogeneity. In this study, a newly isolated strain of Brevibacillus invocatus strain IBA capable of extracellular melanin production was grown on nutrient agar and the bacteria were molecularly identified. Chemical and physical methods were used to characterize melanin. The solubility of melanin in organic and inorganic solvents was used to characterise it chemically. According to the UV-visible wavelength scan, physical characterization revealed absorption in the UV region 200 to 300 nm, but declining towards the visible region. Functional group identification of extracted melanin was carried out by FTIR with different stretching vibrations at 3226, 2920, 2849, 1628, 1555, 1340 cm-1 and weak absorption bands at 1104 and 1015 cm-1. Structural characterization was carried by SEM of extracted melanin which showed irregular shape and size at different magnifications. The crystallinity of melanin was studied using X-ray crystallography, with a lattice parameter of approximately a = 8.54. The XRD spectrum of the extracted melanin crystallographic pattern revealed peaks at 2θ = 27.32, 31.66, 45.41, 53.84, 53.84, 56.44, 66.18, 73.10, 75.26, and 83.94, which correspond to reflections (111), (200), (220), (311), (222), (400), (331), (420), and (422), respectively. The analytical methods available for melanin analysis are largely complementary, providing detailed knowledge required to draw reliable conclusions about the sample under investigation.
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Affiliation(s)
- Avinash Ammanagi
- Department of Studies in Biotechnology and Microbiology, Karnatak University, Dharwad, Karnataka, India.
| | - Shivasharana C T
- Department of Studies in Biotechnology and Microbiology, Karnatak University, Dharwad, Karnataka, India.
| | - Krishnaveni R
- Department of Microbiology Vijayanagara Sri Krishna Devaraya University, Ballari, Karnataka, India
| | - Abhijeeth Badiger
- Department of Biotechnology, Sri Dharmasthala Manjunatheshwara College, Ujire, Karnataka, India
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Kumar V, Dwivedi SK. Mycoremediation of heavy metals: processes, mechanisms, and affecting factors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:10375-10412. [PMID: 33410020 DOI: 10.1007/s11356-020-11491-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 10/30/2020] [Indexed: 05/27/2023]
Abstract
Industrial processes and mining of coal and metal ores are generating a number of threats by polluting natural water bodies. Contamination of heavy metals (HMs) in water and soil is the most serious problem caused by industrial and mining processes and other anthropogenic activities. The available literature suggests that existing conventional technologies are costly and generated hazardous waste that necessitates disposal. So, there is a need for cheap and green approaches for the treatment of such contaminated wastewater. Bioremediation is considered a sustainable way where fungi seem to be good bioremediation agents to treat HM-polluted wastewater. Fungi have high adsorption and accumulation capacity of HMs and can be potentially utilized. The most important biomechanisms which are involved in HM tolerance and removal by fungi are bioaccumulation, bioadsorption, biosynthesis, biomineralisation, bioreduction, bio-oxidation, extracellular precipitation, intracellular precipitation, surface sorption, etc. which vary from species to species. However, the time, pH, temperature, concentration of HMs, the dose of fungal biomass, and shaking rate are the most influencing factors that affect the bioremediation of HMs and vary with characteristics of the fungi and nature of the HMs. In this review, we have discussed the application of fungi, involved tolerance and removal strategies in fungi, and factors affecting the removal of HMs.
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Affiliation(s)
- Vinay Kumar
- Department of Environmental Science, Babasaheb Bhimrao Ambedkar University, Lucknow, 226025, India.
| | - Shiv Kumar Dwivedi
- Department of Environmental Science, Babasaheb Bhimrao Ambedkar University, Lucknow, 226025, India
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Plaza-Rojas L, Guevara-Patiño JA. The Role of the NKG2D in Vitiligo. Front Immunol 2021; 12:624131. [PMID: 33717132 PMCID: PMC7952755 DOI: 10.3389/fimmu.2021.624131] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/02/2021] [Indexed: 12/16/2022] Open
Abstract
Vitiligo is an acquired multifactorial disease that affects melanocytes and results in skin depigmentation. In this review, we examine the role of cells stress and self-reactive T cells responses. Given the canonical and non-canonical functions of NKG2D, such as authenticating stressed target and enhance TCR signaling, we examine how melanocyte stress leads to the expression of ligands that are recognized by the activating receptor NKG2D, and how its signaling results in the turning of T cells against self (melanocyte suicide by proxy). We also discuss how this initiation phase is followed by T cell perpetuation, as NKG2D signaling results in self-sustained long-lasting T cells, with improved cytolytic properties.
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Affiliation(s)
- Lourdes Plaza-Rojas
- Department of Cancer Biology, Loyola University Chicago, Chicago, IL, United States
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10
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Shih BB, Farrar MD, Vail A, Allan D, Chao MR, Hu CW, Jones GDD, Cooke MS, Rhodes LE. Influence of skin melanisation and ultraviolet radiation on biomarkers of systemic oxidative stress. Free Radic Biol Med 2020; 160:40-46. [PMID: 32768566 PMCID: PMC7938299 DOI: 10.1016/j.freeradbiomed.2020.07.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/14/2020] [Accepted: 07/27/2020] [Indexed: 12/22/2022]
Abstract
Skin melanisation ranges widely across human populations. Melanin has antioxidant properties and also acts as a filter to solar ultraviolet radiation (UVR) incident upon the skin. In this study we firstly examined whether melanin level might influence baseline levels of systemic oxidative stress, in 65 humans in vivo from the same geographical area ranging from the lightest to darkest skin type (phototype I-VI). This was examined in winter-time (latitude 53.5°N). Remarkably, we found that urinary biomarkers of oxidatively-generated DNA damage (8-oxodG) and RNA damage (8-oxoGuo) were significantly correlated with skin lightness (L*), such that 14-15% of the variation in their baseline levels could be explained by skin colour. Next we exposed 15 humans at the extremes of skin melanisation to a simulated summer-time exposure of solar UVR (95% UVA, 5% UVB; dose standardised to sunburn threshold), following which they provided a sample of every urine void over the next five days. We found that UVR induced a small but significant increase in urinary 8-oxodG and 8-oxoGuo, with differing kinetics between skin types. Thus greater melanisation is associated with protection against systemic oxidative stress, which may reflect melanin's antioxidant properties, and solar UVR exposure also influences systemic oxidative stress levels in humans. These novel findings may have profound implications for human physiology and health.
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Affiliation(s)
- Barbara B Shih
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences, 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, Manchester, UK.
| | - Mark D Farrar
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences, 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, Manchester, UK.
| | - Andy Vail
- Centre for Biostatistics, Division of Population Health, Health Services Research & Primary Care, School of Health Sciences, Faculty of Biology Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK.
| | - Donald Allan
- Medical Physics Department, Salford Royal NHS Foundation Trust and The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK.
| | - Mu-Rong Chao
- Department of Occupational Safety and Health, Chung Shan Medical University, Taichung, 402, Taiwan.
| | - Chiung-Wen Hu
- Department of Public Health, Chung Shan Medical University, Taichung, 402, Taiwan.
| | - George D D Jones
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK.
| | - Marcus S Cooke
- Oxidative Stress Group, Department of Cell Biology, Microbiology and Molecular Biology University of South Florida, Tampa, FL, 33620, USA.
| | - Lesley E Rhodes
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences, 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, Manchester, UK.
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11
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Melanocytes derived from mouse hair follicles: A novel study model to assess pigmentation disorders. Pathol Res Pract 2020; 216:153224. [PMID: 33027751 DOI: 10.1016/j.prp.2020.153224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/29/2020] [Accepted: 09/15/2020] [Indexed: 11/23/2022]
Abstract
Melanocytes are the major cells responsible for skin and fair pigmentation in vertebrates. They localize to hair follicles(HFs) and the epidermis during embryonic development. A reduced number or dysfunction of melanocytes results in pigmentation disorders.Thus, methods for isolation, culture, and identification of melanocytes in mouse hair follicles provide an experimental basis for thestudy of of pigmentation disorders. In the current work, we harvested the melanocytes from the anagen phase dorsal skin of C57BL/6 mice.After its separation from the skin, the dermis was digested, and the HFs were released. HFs were then also digested, and the cells released from HFs were cultured in melanocyte growth medium. Immunofluorescence and immunohistochemistry staining were used to localize the distribution of melanocytes in HFs . Reverse transcription polymerase chain reaction was performed to detect the expression of specific melanocyte marker genes. Immunofluorescence, immunohistochemistry, flow cytometry, and western blot were carried out to detect the expression of marker proteins in cells. 3,4-Dihydroxy-L-phenylalanine (L-DOPA) staining was used to detect the pigmentation functionality of melaonocytes. Based on our results, we conclude that mature and functional melanocytes can be successfully obtained from theHFs, providing a cell model to study pigmentation disorders. The current findings provide novel insights for the treatment of pigmentation disorders by autologous cell transplantation. Further, we believe that issues related to skin damage, insufficient numbers of autologous cells, and autoimmune problems can be resolved in future though the use of functional melanocytes.
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Biological activities of melanin pigment extracted from Bombyx mori gut-associated yeast Cryptococcus rajasthanensis KY627764. World J Microbiol Biotechnol 2020; 36:159. [PMID: 32974753 DOI: 10.1007/s11274-020-02924-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 09/03/2020] [Indexed: 12/22/2022]
Abstract
Melanin pigment has been produced and extracted from a wide variety of living forms ranging from microorganisms to higher organisms. Owing to the therapeutic nature of the pigment, various microbial populations have been explored for its production. Hence, we isolated a melanin producing yeast from the insect Bombyx mori gut microflora and identified it as Cryptococcus rajasthanensis based on the molecular characterization. The isolated yeast produced enhanced melanin pigment when cultured in the minimal L-tyrosine broth as compared to the Saboraud medium. The pigment was extracted and characterized as melanin based on UV-Visible spectroscopy, FTIR (Fourier-transform infrared) spectroscopy and 1H NMR (Nuclear magnetic resonance). The melanin pigment was evaluated as a potent bioactive molecule with bioactivity like antimicrobial, antioxidant, anti-inflammatory, and anticancer activity that describes the therapeutic nature of the extracted melanin pigment. Distinct from the biologically active role the melanin pigment isolated from the yeast, the Cryptococcus extract also exhibited killer toxin activity against the pathogenic yeast Candida albicans.
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Hasse S, Meder T, Freund E, von Woedtke T, Bekeschus S. Plasma Treatment Limits Human Melanoma Spheroid Growth and Metastasis Independent of the Ambient Gas Composition. Cancers (Basel) 2020; 12:cancers12092570. [PMID: 32917026 PMCID: PMC7565798 DOI: 10.3390/cancers12092570] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 09/03/2020] [Accepted: 09/07/2020] [Indexed: 12/14/2022] Open
Abstract
Simple Summary Despite recent advances in therapeutic options, melanoma remains a deadly disease with a poor prognosis. Physical gas plasma has been proposed as a promising technology for the treatment of melanoma. This study aimed to develop and investigate a convenient test system based on three-dimensional cell cultures (spheroids) of two melanoma cell lines in response to physical gas plasma. The experimental approach combined high-content imaging technology and different gas plasma treatment modalities (direct and indirect, gas compositions). Our results revealed that plasma treatment was toxic for both cell lines predominantly dependent on the treatment time. Furthermore, we addressed the question of safety and morphological changes in response to physical gas plasma exposure and found no support for metastatic progression. Treatment with physical gas plasma effectively limited the growth of human 3D melanoma spheroids and provided a versatile test system for more in vivo-like tumor tissue. Abstract Melanoma skin cancer is still a deadly disease despite recent advances in therapy. Previous studies have suggested medical plasma technology as a promising modality for melanoma treatment. However, the efficacy of plasmas operated under different ambient air conditions and the comparison of direct and indirect plasma treatments are mostly unexplored for this tumor entity. Moreover, exactly how plasma treatment affects melanoma metastasis has still not been explained. Using 3D tumor spheroid models and high-content imaging technology, we addressed these questions by utilizing one metastatic and one non-metastatic human melanoma cell line targeted with an argon plasma jet. Plasma treatment was toxic in both cell lines. Modulating the oxygen and nitrogen ambient air composition (100/0, 75/25, 50/50, 25/75, and 0/100) gave similar toxicity and reduced the spheroid growth for all conditions. This was the case for both direct and indirect treatments, with the former showing a treatment time-dependent response while the latter resulted in cytotoxicity with the longest treatment time investigated. Live-cell imaging of in-gel cultured spheroids indicated that plasma treatment did not enhance metastasis, and flow cytometry showed a significant modulation of S100A4 but not in any of the five other metastasis-related markers (β-catenin, E-cadherin, LEF1, SLUG, and ZEB1) investigated.
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Affiliation(s)
- Sybille Hasse
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany; (S.H.); tita-meder-@gmx.de (T.M.); (E.F.); (T.v.W.)
| | - Tita Meder
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany; (S.H.); tita-meder-@gmx.de (T.M.); (E.F.); (T.v.W.)
| | - Eric Freund
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany; (S.H.); tita-meder-@gmx.de (T.M.); (E.F.); (T.v.W.)
- Department of General, Visceral, Thoracic and Vascular Surgery, Greifswald University Medical Center, Ferdinand-Sauerbruch-Str., 17475 Greifswald, Germany
| | - Thomas von Woedtke
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany; (S.H.); tita-meder-@gmx.de (T.M.); (E.F.); (T.v.W.)
- Institute for Hygiene and Environmental Medicine, Greifswald University Medical Center, Walther-Rathenau-Str. 48, 17489 Greifswald, Germany
| | - Sander Bekeschus
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany; (S.H.); tita-meder-@gmx.de (T.M.); (E.F.); (T.v.W.)
- Correspondence:
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Zhang Y, Sil BC, Kung CP, Hadgraft J, Heinrich M, Sinko B, Lane ME. Characterization and topical delivery of phenylethyl resorcinol. Int J Cosmet Sci 2020; 41:479-488. [PMID: 31378949 DOI: 10.1111/ics.12565] [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: 07/18/2019] [Accepted: 07/31/2019] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Phenylethyl resorcinol (PR) has been used widely in the personal care industry as a novel skin lightening ingredient. Surprisingly, there is only limited information describing the physicochemical properties of this active. Therefore, the primary objective of this study was to perform a comprehensive characterization of PR. A secondary objective was to investigate the delivery of this molecule to mammalian skin. METHODS Phenylethyl resorcinol was characterized using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and nuclear magnetic resonance (NMR). A new high-performance liquid chromatographic (HPLC) method for analysis of PR was developed and validated. The log P (octanol water partition coefficient), value, solubility and short-term stability of PR in a series of vehicles were also determined using HPLC. The evaporation of the selected vehicles was examined using dynamic vapour sorption (DVS). The permeation profiles of PR were investigated under finite dose conditions in porcine and human skin. RESULTS The melting point of PR was determined to be 79.13 °C and the measured log P (octanol water partition coefficient) at 21 °C was 3.35 ± 0.03. The linearity of the HPLC analytical method was confirmed with an r2 value of 0.99. Accuracy of the method was evaluated by average recovery rates at three tested concentrations, and the values ranged from 99 to 106%. The limit of detection (LOD) and limit of quantification (LOQ) were 0.19 and 0.57 μg mL-1 , respectively. The solubility of PR in PG, DMI, glycerol was within the range of 367 to 877 mg mL-1 . The stability of PR in tested solvents was also confirmed by the 72 h stability studies. From the DVS studies, 70-125% of applied formulations were recovered at 24 h. The permeation through porcine skin at 24 h ranged from 4 to 13 μg cm-2 , while the corresponding amounts of PR delivered through human skin were 2 to 10 μg cm-2 . CONCLUSION The physicochemical properties of PR confirm it is suitable for dermal delivery. In this study, propylene glycol was the most promising vehicle for PR delivery to human skin. Future work will expand the range of vehicles studied and explore the percutaneous absorption from more complex formulations.
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Affiliation(s)
- Y Zhang
- UCL School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - B C Sil
- London Metropolitan University, 166-220 Holloway Road, London, N7 8DB, UK
| | - C-P Kung
- UCL School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - J Hadgraft
- UCL School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - M Heinrich
- UCL School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - B Sinko
- Pion Inc., 10 Cook Street, Billerica, MA, 01821, USA
| | - M E Lane
- UCL School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, UK
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Baldea I, Giurgiu L, Teacoe ID, Olteanu DE, Olteanu FC, Clichici S, Filip GA. Photodynamic Therapy in Melanoma - Where do we Stand? Curr Med Chem 2019; 25:5540-5563. [PMID: 29278205 DOI: 10.2174/0929867325666171226115626] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 11/21/2017] [Accepted: 11/29/2017] [Indexed: 12/19/2022]
Abstract
BACKGROUND Malignant melanoma is one of the most aggressive malignant tumors, with unpredictable evolution. Despite numerous therapeutic options, like chemotherapy, BRAF inhibitors and immunotherapy, advanced melanoma prognosis remains severe. Photodynamic therapy (PDT) has been successfully used as the first line or palliative therapy for the treatment of lung, esophageal, bladder, non melanoma skin and head and neck cancers. However, classical PDT has shown some drawbacks that limit its clinical application in melanoma. OBJECTIVE The most important challenge is to overcome melanoma resistance, due to melanosomal trapping, presence of melanin, enhanced oxidative stress defense, defects in the apoptotic pathways, immune evasion, neoangiogenesis stimulation. METHOD In this review we considered: (1) main signaling molecular pathways deregulated in melanoma as potential targets for personalized therapy, including PDT, (2) results of the clinical studies regarding PDT of melanoma, especially advanced metastatic stage, (3) progresses made in the design of anti-melanoma photosensitizers (4) inhibition of tumor neoangiogenesis, as well as (5) advantages of the derived therapies like photothermal therapy, sonodynamic therapy. RESULTS PDT represents a promising alternative palliative treatment for advanced melanoma patients, mainly due to its minimal invasive character and low side effects. Efficient melanoma PDT requires: (1) improved, tumor targeted, NIR absorbing photosensitizers, capable of inducing high amounts of different ROS inside tumor and vasculature cells, possibly allowing a theranostic approach; (2) an efficient adjuvant immune therapy. CONCLUSION Combination of PDT with immune stimulation might be the key to overcome the melanoma resistance and to obtain better, sustainable clinical results.
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Affiliation(s)
- Ioana Baldea
- Physiology Department, University of Medicine and Pharmacy, Iuliu Hatieganu, Cluj-Napoca, Romania
| | - Lorin Giurgiu
- Physiology Department, University of Medicine and Pharmacy, Iuliu Hatieganu, Cluj-Napoca, Romania
| | - Ioana Diana Teacoe
- Physiology Department, University of Medicine and Pharmacy, Iuliu Hatieganu, Cluj-Napoca, Romania
| | - Diana Elena Olteanu
- Physiology Department, University of Medicine and Pharmacy, Iuliu Hatieganu, Cluj-Napoca, Romania
| | - Florin Catalin Olteanu
- Industrial Engineering and Management Department, Transylvania University, Brasov, Romania
| | - Simona Clichici
- Physiology Department, University of Medicine and Pharmacy, Iuliu Hatieganu, Cluj-Napoca, Romania
| | - Gabriela Adriana Filip
- Physiology Department, University of Medicine and Pharmacy, Iuliu Hatieganu, Cluj-Napoca, Romania
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Liu Y, Xue L, Gao H, Chang L, Yu X, Zhu Z, He X, Geng J, Dong Y, Li H, Zhang L, Wang H. Exosomal miRNA derived from keratinocytes regulates pigmentation in melanocytes. J Dermatol Sci 2019; 93:159-167. [PMID: 30904353 DOI: 10.1016/j.jdermsci.2019.02.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 01/28/2019] [Accepted: 02/12/2019] [Indexed: 01/27/2023]
Abstract
BACKGROUND Pigmentation is controlled by complex mechanisms. Evidence suggests that miRNAs can regulate pigmentation. However, the mechanism has not been fully elucidated. Objective In this study, we revealed a novel mechanism that regulates pigmentation involving exosomes, miRNAs and the crosstalk between keratinocytes and melanocytes. METHODS The expression and localization of exosome specific marker TSG101 in keratinocytes and melanocytes; Changes of melanin content in melanocytes after co-culture of exosome and melanocytes; Expression changes of target gene TYR and its related genes and inhibitory effect of miR-330-5p on pigmentation were studied by using various molecular biological techniques. RESULTS In this experiment, we used miR-330-5p in keratinocytes to verify the effect of keratinocyte derived exosome on melanocyte pigmentation. First, we found that keratinocytes secrete exosomes carrying miR-330-5p; moreover, greater miR-330-5p expression was found in exosomes derived from keratinocytes that overexpressed miR-330-5p. Second, we found that exosomes derived from keratinocytes with overexpression of miR-330-5p caused a significant increase in miR-330-5p in melanocytes. Finally, exosomes derived from keratinocytes that overexpressed miR-330-5p induced a significant decrease in the production of melanin and expression of TYR in melanocytes. Meanwhile, we overexpressed miR-330-5p in melanocytes, which also proved the inhibitory effect of miR-330-5p on pigmentation. CONCLUSION These findings suggest that keratinocytes crosstalk with melanocytes in the epidermal melanin unit via exosomal miRNAs. These studies reveal an important role of exosomes in melanocyte pigmentation, which opens a new pathway of melanogenesis.
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Affiliation(s)
- Ying Liu
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Linli Xue
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Hang Gao
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Lucheng Chang
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Xiuju Yu
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Zhiwei Zhu
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Xiaoyan He
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Jianjun Geng
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Yanjun Dong
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Hongquan Li
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Liping Zhang
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China; Nephrology Division, Department of Medicine, Baylor College of Medicine, Houston, TX, 77030, USA.
| | - Haidong Wang
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China.
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Wrześniok D, Rok J, Beberok A, Rzepka Z, Respondek M, Pilawa B, Zdybel M, Delijewski M, Buszman E. Kanamycin induces free radicals formation in melanocytes: An important factor for aminoglycosides ototoxicity. J Cell Biochem 2019; 120:1165-1173. [PMID: 30461043 DOI: 10.1002/jcb.26817] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 02/28/2018] [Indexed: 01/24/2023]
Abstract
Ototoxicity is well-documented but not fully understood undesirable side effect of aminoglycoside antibiotic, kanamycin. Kanamycin is capable of binding to melanin biopolymers-natural pigments of the skin, hair, and eyes. Melanin-producing cells, melanocytes, are also present in the inner ear and are known to be necessary for normal hearing. It was considered that melanin content in the inner ear may influence aminoglycoside-induced ototoxic effect. The impact of kanamycin on melanocytes homeostasis may thus play role in the antibiotic-induced ototoxic effect. Previously, we demonstrated that kanamycin disturbs homeostasis in light-pigmented melanocytes. To investigate if/how melanization contributes to this phenomenon, the study using in vitro model of dark-pigmented melanocytes is required. Spectrophotometric measurements and electron paramagnetic resonance (EPR) spectroscopy analysis were performed. Kanamycin induced a concentration-dependent loss in HEMn-DP melanocytes viability. The value of IC 50 was estimated to be 5.0 mM. Modulation of the activity of analyzed antioxidant enzymes and increased production of free radicals as well as the decrease of the melanin content were observed. Our results confirmed that kanamycin generates oxidative stress in melanocytes. The increased level of free radicals caused by kanamycin may be responsible for the imbalance of antioxidant defense and the reduction of melanin content in melanocytes. The role of melanin in the mechanism of kanamycin-induced hearing impairment was discussed and the obtained results were compared with the previously demonstrated data concerning light-pigmented melanocytes.
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Affiliation(s)
- Dorota Wrześniok
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
| | - Jakub Rok
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
| | - Artur Beberok
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
| | - Zuzanna Rzepka
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
| | - Michalina Respondek
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
| | - Barbara Pilawa
- Department of Biophysics, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
| | - Magdalena Zdybel
- Department of Biophysics, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
| | - Marcin Delijewski
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
| | - Ewa Buszman
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
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Dej-adisai S, Parndaeng K, Wattanapiromsakul C, Nuankaew W, Kang T. Effects of selected moraceae plants on tyrosinase enzyme and melanin content. Pharmacogn Mag 2019. [DOI: 10.4103/pm.pm_43_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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cAMP-mediated regulation of melanocyte genomic instability: A melanoma-preventive strategy. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2018; 115:247-295. [PMID: 30798934 DOI: 10.1016/bs.apcsb.2018.10.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Malignant melanoma of the skin is the leading cause of death from skin cancer and ranks fifth in cancer incidence among all cancers in the United States. While melanoma mortality has remained steady for the past several decades, melanoma incidence has been increasing, particularly among fair-skinned individuals. According to the American Cancer Society, nearly 10,000 people in the United States will die from melanoma this year. Individuals with dark skin complexion are protected damage generated by UV-light due to the high content of UV-blocking melanin pigment in their epidermis as well as better capacity for melanocytes to cope with UV damage. There is now ample evidence that suggests that the melanocortin 1 receptor (MC1R) is a major melanoma risk factor. Inherited loss-of-function mutations in MC1R are common in melanoma-prone persons, correlating with a less melanized skin complexion and poorer recovery from mutagenic photodamage. We and others are interested in the MC1R signaling pathway in melanocytes, its mechanisms of enhancing genomic stability and pharmacologic opportunities to reduce melanoma risk based on those insights. In this chapter, we review melanoma risk factors, the MC1R signaling pathway, and the relationship between MC1R signaling and DNA repair.
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New diterpenes leojaponins G–L from Leonurus japonicus. Fitoterapia 2018; 130:125-133. [DOI: 10.1016/j.fitote.2018.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/15/2018] [Accepted: 08/22/2018] [Indexed: 02/07/2023]
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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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Ultracytochemical visualization of calcium distribution in heart cells and erythrocytes of zebrafish Danio rerio. Micron 2018; 111:19-27. [DOI: 10.1016/j.micron.2018.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 05/23/2018] [Accepted: 05/23/2018] [Indexed: 01/06/2023]
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23
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Knörle R. Neuromelanin in Parkinson's Disease: from Fenton Reaction to Calcium Signaling. Neurotox Res 2017; 33:515-522. [PMID: 28879408 DOI: 10.1007/s12640-017-9804-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/14/2017] [Accepted: 08/23/2017] [Indexed: 12/13/2022]
Abstract
Neuromelanin is supposed to play a key role in the pathogenesis of Parkinson's disease. A common theory is the formation of reactive oxygen species through the Fenton reaction catalyzed by neuromelanin-bound iron ions and subsequent death of the dopaminergic cells in the substantia nigra. From a physicochemical point of view, this pathway is rather implausible: a highly reactive radical built within a powerful radical scavenger would more promptly be inactivated before it might diffuse within the cell to reach a target to exert its deleterious potential. This review of the literature provides evidence for an interaction of neuromelanin with the calcium signaling pathway in Parkinson's disease and expands the view of the pathophysiological contribution of neuromelanin towards a cytoprotective involvement of this macromolecule in the calcium signaling system. More probably than being directly involved in the production of reactive oxygen species, neuromelanin may act as a calcium reservoir and thus protect dopaminergic cells from cell death. A loss of neuromelanin, as observed in the substantia nigra of Parkinson patients, would lead to enhanced calcium messaging through the loss of an important calcium reservoir and thus finally via the formation of reactive oxygen species to cell death within the substantia nigra.
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Affiliation(s)
- Rainer Knörle
- IBAM GbR Dr. Rainer Knörle Dr. Peter Schnierle, Ferdinand-Porsche-Str. 5, 79211, Denzlingen, Germany.
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ElObeid AS, Kamal-Eldin A, Abdelhalim MAK, Haseeb AM. Pharmacological Properties of Melanin and its Function in Health. Basic Clin Pharmacol Toxicol 2017; 120:515-522. [PMID: 28027430 DOI: 10.1111/bcpt.12748] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/14/2016] [Indexed: 01/08/2023]
Abstract
The biological pigment melanin is present in most of the biological systems. It manifests a host of biological and pharmacological properties. Its role as a molecule with special properties and functions affecting general health, including photoprotective and immunological action, are well recognized. Its antioxidant, anti-inflammatory, immunomodulatory, radioprotective, hepatic, gastrointestinal and hypoglycaemic benefits have only recently been recognized and studied. It is also associated with certain disorders of the nervous system. In this MiniReview, we consider the steadily increasing literature on the bioavailability and functional activity of melanin. Published literature shows that melanin may play a number of possible pharmacological effects such as protective, stimulatory, diagnostic and curative roles in human health. In this MiniReview, possible health roles and pharmacological effects are considered.
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Affiliation(s)
- Adila Salih ElObeid
- King Abdullah International Medical Research Centre, National Guard & Health Affairs, Riyadh, Saudi Arabia
| | - Afaf Kamal-Eldin
- Department of Food Science, United Arab Emirates University, AlAin, United Arab Emirates
| | | | - Adil M Haseeb
- Physics and Astronomy Department, King Saud University, Riyadh, Saudi Arabia
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25
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El-Naggar NEA, El-Ewasy SM. Bioproduction, characterization, anticancer and antioxidant activities of extracellular melanin pigment produced by newly isolated microbial cell factories Streptomyces glaucescens NEAE-H. Sci Rep 2017; 7:42129. [PMID: 28195138 PMCID: PMC5307326 DOI: 10.1038/srep42129] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 01/06/2017] [Indexed: 11/09/2022] Open
Abstract
In this present study, a newly isolated strain, Streptomyces sp. NEAE-H, capable of producing high amount of black extracellular melanin pigment on peptone-yeast extract iron agar and identified as Streptomyces glaucescens NEAE-H. Plackett-Burman statistical design was conducted for initial screening of 17 independent (assigned) variables for their significances on melanin pigment production by Streptomyces glaucescens NEAE-H. The most significant factors affecting melanin production are incubation period, protease-peptone and ferric ammonium citrate. The levels of these significant variables and their interaction effects were optimized by using face-centered central composite design. The maximum melanin production (31.650 μg/0.1 ml) and tyrosinase activity (6089.10 U/ml) were achieved in the central point runs under the conditions of incubation period (6 days), protease-peptone (5 g/L) and ferric ammonium citrate (0.5 g/L). Melanin pigment was recovered by acid-treatment. Higher absorption of the purified melanin pigment was observed in the UV region at 250 nm. It appeared to have defined small spheres by scanning electron microscopy imaging. The maximum melanin yield was 350 mg dry wt/L of production medium. In vitro anticancer activity of melanin pigment was assayed against skin cancer cell line using MTT assay. The IC50 value was 16.34 ± 1.31 μg/ml for melanin and 8.8 ± 0.5 μg/ml for standard 5-fluorouracil.
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Affiliation(s)
- Noura El-Ahmady El-Naggar
- Department of Bioprocess Development, Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Technological Applications, Alexandria, Egypt
| | - Sara M El-Ewasy
- Department of Bioprocess Development, Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Technological Applications, Alexandria, Egypt
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Meira WV, Heinrich TA, Cadena SMSC, Martinez GR. Melanogenesis inhibits respiration in B16-F10 melanoma cells whereas enhances mitochondrial cell content. Exp Cell Res 2016; 350:62-72. [PMID: 27864061 DOI: 10.1016/j.yexcr.2016.11.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 10/24/2016] [Accepted: 11/02/2016] [Indexed: 11/29/2022]
Abstract
Melanoma is a rare and aggressive skin tumor; the survival of patients diagnosed late is fairly low. This high mortality rate is due to the characteristics of the cells that allow them to be resistant to radiotherapy and conventional chemotherapy, besides of being able to evade the immune system. Melanin, the pigment responsible for skin, hair and eye color, seems to be involved in this resistance. The main function of melanin is to protect the cells against ultraviolet (UV) light by absorbing this radiation and reactive oxygen species (ROS) scavenging. But this pigment may have also a role as photosensitizer, because when it is irradiated with UVA light (320-400 nm), the generation of ROS was detected. Besides, the melanogenesis stimulation on B16-F10 cells resulted in cell cycle arrest, induction of a quiescent state, change in the expression of several proteins and alterations on ADP/ATP ratio. The present study aimed to investigate the influence of melanogenesis stimulation in mitochondrial function of B16-F10 melanoma cells. Therefore, we analyzed cells respiration, mitochondrial membrane potential (Δψm) and mitochondria mass in B16-F10 melanoma cells stimulated with 0.4mML-tyrosine and 10mM NH4Cl. Our results showed that the induction of melanin synthesis was able to reduce significantly the oxygen consumption after 48h of stimulation, without changes of mitochondrial membrane potential when compared to non-stimulated cells. Despite of respiration inhibition, the mitochondria mass was higher in cells with melanogenesis stimulation. We suggest that the stimulation in the melanin synthesis might be promoting the inhibition of electrons transport chain by some intermediate compound from the synthesis of the pigment and this effect could contribute to explain the entry in the quiescent state.
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Affiliation(s)
- Willian Vanderlei Meira
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, PR, Brazil
| | - Tassiele Andréa Heinrich
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, PR, Brazil
| | | | - Glaucia Regina Martinez
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, PR, Brazil.
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Delijewski M, Wrześniok D, Beberok A, Rok J, Otręba M, Buszman E. The effect of simultaneous exposure of HEMn-DP and HEMn-LP melanocytes to nicotine and UV-radiation on the cell viability and melanogenesis. ENVIRONMENTAL RESEARCH 2016; 151:44-49. [PMID: 27450998 DOI: 10.1016/j.envres.2016.07.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 07/06/2016] [Accepted: 07/07/2016] [Indexed: 06/06/2023]
Abstract
Nicotine is a main compound of tobacco plants and may affect more than a billion people all over the world that are permanently exposed to nicotine from cigarettes, various forms of smoking cessation therapies, electronic cigarettes or second-hand smoke. It is known that nicotine forms complexes with melanin what may lead to accumulation of this alkaloid in tissues of living organisms containing the pigment. This may affect the viability of cells and process of melanin biosynthesis that takes place in melanocytes. Although UV radiation is known to be a particular inductor of melanin biosynthesis, its simultaneous effect with nicotine on this process as well as the viability of human cells containing melanin have not been assessed so far. The aim of this study was to examine the simultaneous impact of nicotine and UV radiation on viability and melanogenesis in cultured normal human melanocytes dark (HEMn-DP) and light (HEMn-LP) pigmented. Nicotine together with UV radiation induced concentration-dependent loss in melanocytes viability. The higher cell loss was observed in dark pigmented melanocytes in comparison to light pigmented cells. Simultaneous exposure of cells to nicotine and UV radiation also caused changes in melanization process in both tested cell lines. The data suggest that simultaneous exposure of melanocytes to nicotine and UV radiation up-regulates melanogenesis and affects cell viability. Observed processes are more pronounced in dark pigmented cells.
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Affiliation(s)
- Marcin Delijewski
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Dorota Wrześniok
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Artur Beberok
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Jakub Rok
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Michał Otręba
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Ewa Buszman
- Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland.
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Fajuyigbe D, Young AR. The impact of skin colour on human photobiological responses. Pigment Cell Melanoma Res 2016; 29:607-618. [PMID: 27454804 PMCID: PMC5132026 DOI: 10.1111/pcmr.12511] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 07/11/2016] [Indexed: 01/30/2023]
Abstract
Terrestrial solar ultraviolet radiation (UVR) exerts both beneficial and adverse effects on human skin. Epidemiological studies show a lower incidence of skin cancer in people with pigmented skins compared to fair skins. This is attributed to photoprotection by epidermal melanin, as is the poorer vitamin D status of those with darker skins. We summarize a wide range of photobiological responses across different skin colours including DNA damage and immunosuppression. Some studies show the generally modest photoprotective properties of melanin, but others show little or no effect. DNA photodamage initiates non‐melanoma skin cancer and is reduced by a factor of about 3 in pigmented skin compared with white skin. This suggests that if such a modest reduction in DNA damage can result in the significantly lower skin cancer incidence in black skin, the use of sunscreen protection might be extremely beneficial for susceptible population. Many contradictory results may be explained by protocol differences, including differences in UVR spectra and exposure protocols. We recommend that skin type comparisons be done with solar‐simulated radiation and standard erythema doses or physical doses (J/m2) rather than those based solely on clinical endpoints such as minimal erythema dose (MED).
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Affiliation(s)
- Damilola Fajuyigbe
- Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, St John's Institute of Dermatology, King's College London, London, UK
| | - Antony R Young
- Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, St John's Institute of Dermatology, King's College London, London, UK
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Wolf Horrell EM, Boulanger MC, D’Orazio JA. Melanocortin 1 Receptor: Structure, Function, and Regulation. Front Genet 2016; 7:95. [PMID: 27303435 PMCID: PMC4885833 DOI: 10.3389/fgene.2016.00095] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 05/13/2016] [Indexed: 01/04/2023] Open
Abstract
The melanocortin 1 receptor (MC1R) is a melanocytic Gs protein coupled receptor that regulates skin pigmentation, UV responses, and melanoma risk. It is a highly polymorphic gene, and loss of function correlates with a fair, UV-sensitive, and melanoma-prone phenotype due to defective epidermal melanization and sub-optimal DNA repair. MC1R signaling, achieved through adenylyl cyclase activation and generation of the second messenger cAMP, is hormonally controlled by the positive agonist melanocortin, the negative agonist agouti signaling protein, and the neutral antagonist β-defensin 3. Activation of cAMP signaling up-regulates melanin production and deposition in the epidermis which functions to limit UV penetration into the skin and enhances nucleotide excision repair (NER), the genomic stability pathway responsible for clearing UV photolesions from DNA to avoid mutagenesis. Herein we review MC1R structure and function and summarize our laboratory's findings on the molecular mechanisms by which MC1R signaling impacts NER.
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Affiliation(s)
- Erin M. Wolf Horrell
- Department of Physiology, University of Kentucky College of MedicineLexington, KY, USA
| | - Mary C. Boulanger
- Markey Cancer Center, University of Kentucky College of MedicineLexington, KY, USA
| | - John A. D’Orazio
- Department of Physiology, University of Kentucky College of MedicineLexington, KY, USA
- Markey Cancer Center, University of Kentucky College of MedicineLexington, KY, USA
- Departments of Pediatrics, Toxicology and Cancer Biology, Physiology, and Pharmacology and Nutritional Sciences, University of Kentucky College of MedicineLexington, KY, USA
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Yang B, Yang Q, Yang X, Yan HB, Lu QP. Hyperoside protects human primary melanocytes against H2O2-induced oxidative damage. Mol Med Rep 2016; 13:4613-9. [PMID: 27082158 PMCID: PMC4878558 DOI: 10.3892/mmr.2016.5107] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 01/26/2016] [Indexed: 11/12/2022] Open
Abstract
Cuscutae semen has been shown to have beneficial effects in the treatment of vitiligo, recorded in the Chinese Pharmacopoeia, whereas the effects of its constituent compounds remains to be elucidated. Using a tetrazolium bromide assay, the present study found that hyperoside (0.5–200 µg/ml) significantly increased the viability of human melanocytes in a time- and dose-dependent manner. The present study used a cell model of hydrogen peroxide (H2O2)-induced oxidative damage to examine the effect of hyperoside on human primary melanocytes. The results demonstrated that hyperoside pretreatment for 2 h decreased cell apoptosis from 54.03±9.11 to 17.46±3.10% in the H2O2-injured melanocytes. The levels of oxidative stress in the mitochondrial membrane potential of the melanocytes increased following hyperoside pretreatment. The mRNA and protein levels of B-cell lymphoma-2/Bcl-2-associated X protein and caspase 3 were regulated by hyperoside, and phosphoinositide 3-kinase/AKT and mitogen-activated protein kinase signaling were also mediated by hyperoside. In conclusion, the results of the present study demonstrated that hyperoside protected the human primary melanocytes against oxidative damage.
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Affiliation(s)
- Bin Yang
- Department of Dermatology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei 430070, P.R. China
| | - Qin Yang
- Department of Laboratory Medicine, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei 430070, P.R. China
| | - Xin Yang
- Department of Dermatology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei 430070, P.R. China
| | - Hong-Bo Yan
- Department of Dermatology, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei 430070, P.R. China
| | - Qi-Ping Lu
- Department of General Surgery, Wuhan General Hospital of Guangzhou Command, Wuhan, Hubei 430070, P.R. China
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Otreba M, Wrześniok D, Beberok A, Rok J, Buszman E. Melanogenesis and antioxidant defense system in normal human melanocytes cultured in the presence of chlorpromazine. Toxicol In Vitro 2015; 29:221-7. [PMID: 25449126 DOI: 10.1016/j.tiv.2014.10.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 10/14/2014] [Accepted: 10/17/2014] [Indexed: 11/17/2022]
Abstract
Chlorpromazine is used in the treatment of schizophrenia and psychotic disorders and belongs to phenothiazine class of neuroleptic drugs. It shows severe side effects such as extrapyramidal symptoms as well as ocular and skin disorders, but the mechanism is still not fully established. The aim of this study was to examine the effect of chlorpromazine on cell viability, melanogenesis and antioxidant defense system in normal human melanocytes. It has been demonstrated that chlorpromazine induces concentration dependent loss in cell viability. The value of EC(50) was calculated to be 2.53 μM. Chlorpromazine in lower concentrations (0.0001, 0.001 and 0.01 μM) increased the melanin and microphthalmia-associated transcription factor (MITF) content and tyrosinase activity, while changes of antioxidant enzymes activity were not observed. It suggests that long-term chlorpromazine therapy, even with low drug doses, may lead to hyperpigmentation disorders in skin and/or eye. The use of the analyzed drug in higher concentrations (0.1 and 1.0 μM) caused significant alterations of antioxidant enzymes activity in normal melanocytes, what may explain a potential role of chlorpromazine in the depletion of cellular antioxidant status leading to other adverse effects associated with the high-dose and/or long-term therapy.
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Affiliation(s)
- Michał Otreba
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, PL 41-200 Sosnowiec, Poland
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Effect of thioridazine on antioxidant status of HEMn-DP melanocytes. Naunyn Schmiedebergs Arch Pharmacol 2015; 388:1097-104. [PMID: 26105001 PMCID: PMC4561062 DOI: 10.1007/s00210-015-1144-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 06/05/2015] [Indexed: 01/11/2023]
Abstract
Thioridazine as an antipsychotic agent was extensively used to treat various psychotic disorders, e.g. schizophrenia. However, the therapy with this drug can induce serious side effects such as extrapyramidal symptoms or ocular and skin disorders, which mechanisms are still not fully established. To gain inside the molecular mechanisms underlying thioridazine toxicity, we examined the effect of this drug on cell viability, antioxidant defence system as well as melanogenesis in normal human melanocytes. It was demonstrated that thioridazine induces concentration-dependent loss in cell viability. The value of EC50 was calculated to be 2.24 μM. To study the effect of thioridazine on antioxidant defence system in melanocytes, the level of hydrogen peroxide and the activities of antioxidant enzymes superoxide dismutase, catalase and glutathione peroxidase were determined. The drug in concentrations of 0.1, 0.25, 1.0 and 2.5 μM caused changes in cellular antioxidant defence system indicating the induction of oxidative stress. It was also shown that the analysed neuroleptic in concentrations of 1.0 and 2.5 μM significantly inhibited melanogenesis. The observed changes in cell viability, antioxidant defence system and melanization in normal human melanocytes after thioridazine treatment may explain an important role of reactive oxygen species as well as melanin in mechanisms involved in this drug side effects directed on pigmented tissues.
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Otręba M, Zdybel M, Pilawa B, Beberok A, Wrześniok D, Rok J, Buszman E. EPR spectroscopy of chlorpromazine-induced free radical formation in normal human melanocytes. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2015; 44:359-65. [PMID: 25981866 PMCID: PMC4464733 DOI: 10.1007/s00249-015-1029-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 03/27/2015] [Accepted: 04/29/2015] [Indexed: 11/26/2022]
Abstract
The purpose of this study was to estimate the effect of chlorpromazine on free radical concentration in HEMn-DP melanocytes using electron paramagnetic resonance (EPR) spectroscopy. It was found that chlorpromazine at concentrations of 1 × 10(-7) and 1 × 10(-6) M contributed to the formation of free radicals (g values ~2) in a dose-dependent manner. The increase in free radical formation was accompanied by an increase in cytotoxicity, as shown by a tetrazolium assay. Homogeneous broadening of EPR lines, slow spin-lattice relaxation processes, and strong dipolar interactions characterized all the tested cellular samples. The performed examination of free radical formation in cells exposed to different chlorpromazine concentrations confirmed the usefulness of electron paramagnetic resonance spectroscopy to determine the effect of a drug on free radical production in a cellular model system in vitro.
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Affiliation(s)
- Michał Otręba
- />Chair and Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Magdalena Zdybel
- />Chair and Department of Biophysics, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jedności 8, 41-200 Sosnowiec, Poland
| | - Barbara Pilawa
- />Chair and Department of Biophysics, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jedności 8, 41-200 Sosnowiec, Poland
| | - Artur Beberok
- />Chair and Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Dorota Wrześniok
- />Chair and Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Jakub Rok
- />Chair and Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Ewa Buszman
- />Chair and Department of Pharmaceutical Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
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Rok J, Buszman E, Delijewski M, Otręba M, Beberok A, Wrześniok D. Effect of tetracycline and UV radiation on melanization and antioxidant status of melanocytes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 148:168-173. [PMID: 25935746 DOI: 10.1016/j.jphotobiol.2015.04.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 04/13/2015] [Accepted: 04/20/2015] [Indexed: 11/28/2022]
Abstract
Tetracycline is a semisynthetic antibiotic and is used in several types of infections against both gram-positive and gram-negative bacteria. This therapy is often associated with phototoxic reactions that occur after exposure to UV radiation and lead to photo-onycholysis, pseudoporphyria, solar urticaria and the fixed drug eruption in the skin. The phototoxic reactions may be related to the melanin content which, on one side may bind drugs - leading to their accumulation, and on the other side, they have photoprotective and antioxidant properties. In this study the effect of tetracycline and UVA irradiation on cell viability, biosynthesis of melanin and antioxidant defense system in cultured normal human epidermal melanocytes (HEMn-DP) was analyzed. The viability of the cells treated with tetracycline and exposed to UVA radiation decreased in a drug concentration-dependent manner. At the same time, the induction of the melanization process was observed. The significant alterations in antioxidant defense system, on the basis of changes in SOD, CAT and GPx activities, were stated. The obtained results may give explanation for the phototoxic effects of tetracycline therapy observed in skin cells exposed to UVA radiation.
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Affiliation(s)
- Jakub Rok
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, PL 41-200 Sosnowiec, Poland
| | - Ewa Buszman
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, PL 41-200 Sosnowiec, Poland.
| | - Marcin Delijewski
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, PL 41-200 Sosnowiec, Poland
| | - Michał Otręba
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, PL 41-200 Sosnowiec, Poland
| | - Artur Beberok
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, PL 41-200 Sosnowiec, Poland
| | - Dorota Wrześniok
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, PL 41-200 Sosnowiec, Poland
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Maresca V, Flori E, Picardo M. Skin phototype: a new perspective. Pigment Cell Melanoma Res 2015; 28:378-89. [DOI: 10.1111/pcmr.12365] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 03/16/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Vittoria Maresca
- Laboratory of Cutaneous Physiopathology and Integrated Centre of Metabolomics Research; San Gallicano Dermatologic Institute; Rome Italy
| | - Enrica Flori
- Laboratory of Cutaneous Physiopathology and Integrated Centre of Metabolomics Research; San Gallicano Dermatologic Institute; Rome Italy
| | - Mauro Picardo
- Laboratory of Cutaneous Physiopathology and Integrated Centre of Metabolomics Research; San Gallicano Dermatologic Institute; Rome Italy
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37
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Impact of sparfloxacin on melanogenesis and antioxidant defense system in normal human melanocytes HEMa-LP – An in vitro study. Pharmacol Rep 2015; 67:38-43. [DOI: 10.1016/j.pharep.2014.07.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 07/25/2014] [Accepted: 07/28/2014] [Indexed: 12/17/2022]
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Effect of norfloxacin and moxifloxacin on melanin synthesis and antioxidant enzymes activity in normal human melanocytes. Mol Cell Biochem 2014; 401:107-14. [PMID: 25433710 PMCID: PMC4315488 DOI: 10.1007/s11010-014-2297-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 11/27/2014] [Indexed: 12/12/2022]
Abstract
Fluoroquinolone antibiotics provide broad-spectrum coverage for a number of infectious diseases, including respiratory as well as urinary tract infections. One of the important adverse effects of these drugs is phototoxicity which introduces a serious limitation to their use. To gain insight the molecular mechanisms underlying the fluoroquinolones-induced phototoxic side effects, the impact of two fluoroquinolone derivatives with different phototoxic potential, norfloxacin and moxifloxacin, on melanogenesis and antioxidant enzymes activity in normal human melanocytes HEMa-LP was determined. Both drugs induced concentration-dependent loss in melanocytes viability. The value of EC50 for these drugs was found to be 0.5 mM. Norfloxacin and moxifloxacin suppressed melanin biosynthesis; antibiotics were shown to inhibit cellular tyrosinase activity and to reduce melanin content in melanocytes. When comparing the both analyzed fluoroquinolones, it was observed that norfloxacin possesses greater inhibitory effect on tyrosinase activity in melanocytes than moxifloxacin. The extent of oxidative stress in cells was assessed by measuring the activity of antioxidant enzymes: SOD, CAT, and GPx. It was observed that norfloxacin caused higher depletion of antioxidant status in melanocytes when compared with moxifloxacin. The obtained results give a new insight into the mechanisms of fluoroquinolones toxicity directed to pigmented tissues. Moreover, the presented differences in modulation of biochemical processes in melanocytes may be an explanation for various phototoxic activities of the analyzed fluoroquinolone derivatives in vivo.
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Boulton SJ, Birch-Machin MA. Impact of hyperpigmentation on superoxide flux and melanoma cell metabolism at mitochondrial complex II. FASEB J 2014; 29:346-53. [PMID: 25351989 DOI: 10.1096/fj.14-261982] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Melanogenesis is a highly conserved process of cytophotoprotection from UV radiation present in many species. Although both mitochondrial function and UV radiation insults are well-documented promoters of increased cellular stress, their individual molecular relationships with skin pigmentation have not been clearly resolved. This study provides evidence for a direct relationship between cellular melanin content, superoxide flux, and mitochondrial function at complex II. Direct and significant correlation between increased pigmentation and complex II turnover was observed in genetically different melanoma cell lines of varied basal pigmentation states (P < 0.01). The same trend was also observed when comparing genetically identical cell cultures with increasing levels of induced pigmentation (P < 0.005). The observation of increased steady-state levels of the catalytic complex II succinate dehydrogenase subunit A alongside hyperpigmentation suggested coregulation of activity and pigment production (P < 0.01). The study also presents novel evidence for a relationship between hyperpigmentation and increased superoxide-generating capacity at complex II. By amperometrically monitoring superoxide flux from differently pigmented FM55 melanocytes and their isolated mitochondria, a dynamic and responsive relationship between pigmentation, complex II function, and intracellular superoxide generation was observed (P < 0.005). The data support hyperpigmentation as a protective antioxidant mechanism in response to complex II-mediated reactive oxygen species generation.
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Affiliation(s)
- Sarah Jayne Boulton
- Dermatological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Mark A Birch-Machin
- Dermatological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne, United Kingdom
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Delijewski M, Beberok A, Otręba M, Wrześniok D, Rok J, Buszman E. Effect of nicotine on melanogenesis and antioxidant status in HEMn-LP melanocytes. ENVIRONMENTAL RESEARCH 2014; 134:309-314. [PMID: 25199971 DOI: 10.1016/j.envres.2014.08.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/05/2014] [Accepted: 08/14/2014] [Indexed: 06/03/2023]
Abstract
Nicotine is a natural ingredient of tobacco plants and is responsible for the addictive properties of tobacco. Nowadays nicotine is also commonly used as a form of smoking cessation therapy. It is suggested that nicotine may be accumulated in human tissues containing melanin. This may in turn affect biochemical processes in human cells producing melanin. The aim of this study was to examine the effect of nicotine on melanogenesis and antioxidant status in cultured normal human melanocytes HEMn-LP. Nicotine induced concentration-dependent loss in melanocytes viability. The value of EC50 was determined to be 7.43 mM. Nicotine inhibited a melanization process in human light pigmented melanocytes and caused alterations of antioxidant defense system. Significant changes in cellular antioxidant enzymes: superoxide dismutase and catalase activities and in hydrogen peroxide content were stated. The obtained results may explain a potential influence of nicotine on biochemical processes in melanocytes in vivo during long term exposition to nicotine.
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Affiliation(s)
- Marcin Delijewski
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Artur Beberok
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Michał Otręba
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Dorota Wrześniok
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Jakub Rok
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Ewa Buszman
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland.
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41
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Glass K, Rengifo R, Porkka F, Simon JD. Probing the surface calcium binding sites of melanosomes using molecular rulers. J Phys Chem B 2014; 118:14110-4. [PMID: 25157748 DOI: 10.1021/jp505384j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Melanosomes have the capacity to bind significant concentrations of calcium, suggesting there are surface binding sites that enable cations to access the interior of fully pigmented melanosomes. The surface of melanosomes is known to contain significant concentrations of carboxylate groups which likely are the initial biding sites for calcium, but their arrangement on the surface of the melanosome is not known. In various calcium proteins, a bidentate coordination by two carboxylate groups is the most common structure. In this study, we determine the distance between neighboring surface carboxylic acid groups by examining the binding of a series of diamines (+)H3N(CH2)mNH3(+) (m = 1-5) to melanosomes isolated from the ink sacs of Sepia officinalis and bovine choroid tissue. Of these amines, ethylenediamine (m = 2) shows optimal bidentate binding, revealing a narrow distribution of distances between neighboring carboxylic acid groups, ∼480 pm, similar to that found in proteins for calcium binding motifs involving two carboxylate groups.
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Affiliation(s)
- Keely Glass
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
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42
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O'Donovan A, Coleman M, Harris R, Herst P. Prophylaxis and management of acute radiation-induced skin toxicity: a survey of practice across Europe and the USA. Eur J Cancer Care (Engl) 2014; 24:425-35. [DOI: 10.1111/ecc.12213] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/08/2014] [Indexed: 11/29/2022]
Affiliation(s)
- A. O'Donovan
- Applied Radiation Therapy Trinity (ARTT); Trinity College Dublin; Dublin Ireland
| | - M. Coleman
- Applied Radiation Therapy Trinity (ARTT); Trinity College Dublin; Dublin Ireland
| | - R. Harris
- The Society and College of Radiographers; London UK
| | - P. Herst
- Department of Radiation Therapy; University of Otago; Wellington New Zealand
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43
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The inhibitory effect of a Platycodon root extract on ultraviolet B-induced pigmentation due to a decrease in Kit expression. J Nat Med 2014; 68:643-6. [PMID: 24799080 PMCID: PMC4050297 DOI: 10.1007/s11418-014-0836-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 03/30/2014] [Indexed: 11/14/2022]
Abstract
The signaling of stem cell factor (SCF) through its receptor Kit is known to play an important role in regulating cutaneous melanogenesis. In the course of UVB-induced pigmentation, the expression of membrane-bound SCF by epidermal keratinocytes is upregulated at an early phase and subsequently activates neighboring melanocytes via their Kit receptors. In order to identify effective skin-lightening materials, we screened botanical extracts to determine their abilities to diminish Kit expression in melanocytes. A Platycodon root extract was consequently found to have a remarkable inhibitory activity on Kit expression. When the extract was applied to three-dimensional human skin substitutes in vitro and to human skin in vivo after UVB irradiation, their pigmentation was significantly reduced, confirming the substantial contribution of the suppression of SCF/Kit signaling to preventing or inhibiting melanin synthesis. These data demonstrate that a Platycodon root extract is a promising material for a skin-lightening product to improve pigmentation-related diseases.
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44
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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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45
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Gomes BR, Siqueira-Soares RDC, dos Santos WD, Marchiosi R, Soares AR, Ferrarese-Filho O. The effects of dopamine on antioxidant enzymes activities and reactive oxygen species levels in soybean roots. PLANT SIGNALING & BEHAVIOR 2014; 9:e977704. [PMID: 25482756 PMCID: PMC4622826 DOI: 10.4161/15592324.2014.977704] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 09/02/2014] [Accepted: 09/03/2014] [Indexed: 05/05/2023]
Abstract
In the current work, we investigated the effects of dopamine, an neurotransmitter found in several plant species on antioxidant enzyme activities and ROS in soybean (Glycine max L. Merrill) roots. The effects of dopamine on SOD, CAT and POD activities, as well as H2O2, O2(•-), melanin contents and lipid peroxidation were evaluated. Three-day-old seedlings were cultivated in half-strength Hoagland nutrient solution (pH 6.0), without or with 0.1 to 1.0 mM dopamine, in a growth chamber (25°C, 12 h photoperiod, irradiance of 280 μmol m(-2) s(-1)) for 24 h. Significant increases in melanin content were observed. The levels of ROS and lipid peroxidation decreased at all concentrations of dopamine tested. The SOD activity increased significantly under the action of dopamine, while CT activity was inhibited and POD activity was unaffected. The results suggest a close relationship between a possible antioxidant activity of dopamine and melanin and activation of SOD, reducing the levels of ROS and damage on membranes of soybean roots.
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Affiliation(s)
- Bruno Ribeiro Gomes
- Laboratory of Plant Biochemistry; Department of Biochemistry; State University of Maringá; Maringá, PR, Brazil
| | | | - Wanderley Dantas dos Santos
- Laboratory of Plant Biochemistry; Department of Biochemistry; State University of Maringá; Maringá, PR, Brazil
| | - Rogério Marchiosi
- Laboratory of Plant Biochemistry; Department of Biochemistry; State University of Maringá; Maringá, PR, Brazil
| | - Anderson Ricardo Soares
- Laboratory of Plant Biochemistry; Department of Biochemistry; State University of Maringá; Maringá, PR, Brazil
| | - Osvaldo Ferrarese-Filho
- Laboratory of Plant Biochemistry; Department of Biochemistry; State University of Maringá; Maringá, PR, Brazil
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46
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Wrześniok D, Beberok A, Otręba M, Buszman E. Effect of streptomycin on melanogenesis and antioxidant status in melanocytes. Mol Cell Biochem 2013; 383:77-84. [PMID: 23867989 DOI: 10.1007/s11010-013-1756-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 07/10/2013] [Indexed: 11/24/2022]
Abstract
Streptomycin is an aminoglycoside antibiotic with an antituberculosis activity commonly used in clinical practice due to its good antimicrobial characteristics. A well-known undesirable side effect of this drug is ototoxicity, which may be caused by overproduction of reactive oxygen species and loss of melanocytes in the inner ear. The aim of this study was to examine the effect of streptomycin on melanogenesis and antioxidant defense system in cultured normal human melanocytes (HEMa-LP). Streptomycin induced concentration-dependent loss in melanocytes viability. The value of EC50 was determined to be ~5.0 mM. It has been shown that streptomycin causes inhibition of tyrosinase activity and reduces melanin content in human melanocytes in a concentration-dependent manner. Significant changes in the activity of cellular antioxidant enzymes: superoxide dismutase, catalase, and glutathione peroxidase were also stated. The results obtained in vitro may explain a potential role of melanocytes and melanin in the causative mechanisms of aminoglycosides ototoxic effects in vivo.
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Affiliation(s)
- Dorota Wrześniok
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200, Sosnowiec, Poland,
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Antityrosinase and antimicrobial activities from Thai medicinal plants. Arch Pharm Res 2013; 37:473-83. [PMID: 23835832 DOI: 10.1007/s12272-013-0198-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 06/24/2013] [Indexed: 10/26/2022]
Abstract
Various dermatological disorders and microbial skin infection can cause hyperpigmentation. Therefore, screenings for whitening and antimicrobial agents from Thai medicinal plants have been of research interest. Seventy-seven ethanol plant extracts were investigated for antityrosinase activity, eleven samples showed the tyrosinase inhibition more than 50 % were further preliminary screening for antimicrobial activity by agar disc diffusion and broth micro-dilution methods. Artocarpus integer (Thunb.) Merr. (Moraceae) root extract, which showed the potential of tyrosinase inhibition with 90.57 ± 2.93 % and antimicrobial activity against Staphylococcus aureus, S. epidermidis, Propionibacterium acnes and Trichophyton mentagophytes with inhibition zone as 9.10 ± 0.00, 10.67 ± 0.09, 15.25 ± 0.05 and 6.60 ± 0.17 mm, respectively was selected for phytochemical investigation. Three pure compounds were isolated as artocarpin, cudraflavone C and artocarpanone. And artocarpanone exhibited anti-tyrosinase effect; artocarpin and cudraflavone C also showed the potential of antibacterial activity against S. aureus, S. epidermidis and P. acnes with MIC at 2, 4 and 2 μg/ml, respectively and MBC at 32 μg/ml for these bacteria. So, these pure compounds are interesting for further study in order to provide possibilities of new whitening and antibacterial development. This will be the first report of phytochemical investigation of A. integer root.
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48
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Sato K, Minai Y, Watanabe H. Effect of monochromatic visible light on intracellular superoxide anion production and mitochondrial membrane potential of B16F1 and B16F10 murine melanoma cells. Cell Biol Int 2013; 37:633-7. [PMID: 23404540 DOI: 10.1002/cbin.10069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 02/04/2013] [Indexed: 01/25/2023]
Abstract
We have investigated the effect of visible light on animal cells using light-emitting diodes to emit monochromatic visible light (red, yellow, green and blue light). To explore the relevant mechanism of apoptosis, we assessed the intracellular superoxide anion production and mitochondrial membrane potential (ΔΨm) of B16F1 and B16F10 murine melanoma cells after monochromatic light irradiation. Blue light caused ΔΨm depolarization subsequent to elevation of intracellular superoxide production. However, red and yellow light had no affect on both cell lines. Green light induced ΔΨm collapse only in B16F1 melanoma cells. ΔΨm is a key indicator of mitochondrial function, therefore its disruption causes mitochondria-dependent apoptosis. Thus, blue light causes mitochondrial dysfunction and subsequent cell death.
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Affiliation(s)
- Kazuomi Sato
- Department of Life Science, College of Agriculture, Tamagawa University, 6-1-1 Tamagawa Gakuen, Machida, Tokyo, Japan
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49
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Modulation of melanogenesis and antioxidant defense system in melanocytes by amikacin. Toxicol In Vitro 2013; 27:1102-8. [PMID: 23416261 DOI: 10.1016/j.tiv.2013.02.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 01/25/2013] [Accepted: 02/06/2013] [Indexed: 11/21/2022]
Abstract
Amikacin is principally used to treat infections caused by microorganisms resistant to other aminoglycosides. Ototoxicity is one of the side effects of amikacin, but the causative mechanism of damage to the ear has not been fully established. Thus, the aim of this work was to examine the impact of amikacin on the melanogenesis and antioxidant defense system in cultured human normal melanocytes (HEMa-LP). Amikacin induced the concentration - dependent loss in melanocytes viability. The value of EC50 was determined to be ~7.5 mM. The analyzed antibiotic inhibited melanin biosynthesis in concentration-dependent manner. Increasing the amikacin concentration also resulted in a decrease in cellular tyrosinase activity. To study the antioxidant defense system in melanocytes, the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) in cells exposed to amikacin were determined. Significant changes in cellular antioxidant enzymes activities were observed. Modulation of melanogenesis and the antioxidant status of melanocytes resulting from the use of amikacin in vitro may explain a potential role of melanin and melanocytes in the mechanisms of aminoglycosides ototoxic effects in vivo.
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50
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Melanogenesis stimulation in B16-F10 melanoma cells induces cell cycle alterations, increased ROS levels and a differential expression of proteins as revealed by proteomic analysis. Exp Cell Res 2012; 318:1913-25. [DOI: 10.1016/j.yexcr.2012.05.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 04/26/2012] [Accepted: 05/16/2012] [Indexed: 12/29/2022]
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