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Yamaguchi K, Minagawa K, Oka R, Masui T. Control of Optical Reflection in Ca 2MgWO 6 by Co and Mo Doping. Molecules 2024; 29:1886. [PMID: 38675706 PMCID: PMC11054814 DOI: 10.3390/molecules29081886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/16/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
To develop novel inorganic red pigments without harmful elements, we focused on the band structure of Ca2(Mg, Co)WO6 and attempted to narrow its bandgap by replacing the W6+ sites in the host structure of Mo6+. Ca2Mg1-xCoxW1-yMoyO6 (0.10 ≤ x ≤ 0.30; 0.45 ≤ y ≤ 0.60) samples were synthesized by a sol-gel method using citric acids, and the crystal structure, optical properties, and color of the samples were characterized. The Ca2Mg1-xCoxW1-yMoyO6 solid solution was successfully formed, which absorbed visible light at wavelengths below 600 nm. In addition, the absorption wavelength shifted to longer wavelengths with increasing Mo6+ content. This is because a new conduction band composed of a Co3d-W5d-Mo4d hybrid orbital was formed by Mo6+ doping to reduce the bandgap energy. Thus, the color of the samples gradually changed from pale orange to dark red, with a hue angle (h°) of less than 35°. Based on the above results, the optical absorption wavelength of the Ca2Mg1-xCoxW1-yMoyO6 system can be controlled to change the color by adjusting the bandgap energy.
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Affiliation(s)
- Kazuki Yamaguchi
- Department of Chemistry and Biotechnology, Faculty of Engineering, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan; (K.Y.); (K.M.)
- Center for Research on Green Sustainable Chemistry, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan
| | - Kohei Minagawa
- Department of Chemistry and Biotechnology, Faculty of Engineering, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan; (K.Y.); (K.M.)
- Center for Research on Green Sustainable Chemistry, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan
| | - Ryohei Oka
- Field of Advanced Ceramics, Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan;
| | - Toshiyuki Masui
- Department of Chemistry and Biotechnology, Faculty of Engineering, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan; (K.Y.); (K.M.)
- Center for Research on Green Sustainable Chemistry, Tottori University, 4-101, Koyama-cho Minami, Tottori 680-8552, Japan
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2
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Santarcangelo A, Schulze-Kaysers N, Schieber A. Improved Generation, Physicochemical Characteristics, and Food Application Studies of a Red Colorant Obtained from Oxidative Coupling of Chlorogenic Acid and Tryptophan. Foods 2024; 13:686. [PMID: 38472799 DOI: 10.3390/foods13050686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 02/07/2024] [Accepted: 02/21/2024] [Indexed: 03/14/2024] Open
Abstract
Due to a widespread consumer reluctance toward synthetic food dyes, the interest in natural compounds from plants has increased. This study aimed to optimize the oxidation process between chlorogenic acid (CQA) and tryptophan (Trp) using sodium periodate (NaIO4) to obtain a red-colored pigment. The impact of temperature and different ratios of Trp to NaIO4 on the reaction progress was investigated. After the best conditions for the reaction were established, three pH values were tested. The reaction time could be reduced from 72 to 24 h with a yield of 46 ± 2% w/w based on the quantity of CQA. After the first purification step of the product by size exclusion chromatography, the pigment obtained was characterized for its solubility, and its hydrolyzed form was used for investigations into the stability at different pH values, storage under light and in the dark (period of 28 days), in the presence of reducing agents, and for heat resistance. Finally, several food matrices were successfully colored with the natural pigment in amounts from 0.005 to 0.01% (w/w). In conclusion, the present study provides new insights into the feasible production and comprehensive characterization of a red pigment derived from oxidative coupling of CQA and Trp, as well as its application in food systems.
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Affiliation(s)
- Ardemia Santarcangelo
- Institute of Nutritional and Food Sciences, Molecular Food Technology, Agricultural Faculty, University of Bonn, 53115 Bonn, Germany
| | - Nadine Schulze-Kaysers
- Institute of Nutritional and Food Sciences, Molecular Food Technology, Agricultural Faculty, University of Bonn, 53115 Bonn, Germany
| | - Andreas Schieber
- Institute of Nutritional and Food Sciences, Molecular Food Technology, Agricultural Faculty, University of Bonn, 53115 Bonn, Germany
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3
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Palma D, Oliva V, Montanares M, Gil-Durán C, Travisany D, Chávez R, Vaca I. Expanding the Toolbox for Genetic Manipulation in Pseudogymnoascus: RNAi-Mediated Silencing and CRISPR/Cas9-Mediated Disruption of a Polyketide Synthase Gene Involved in Red Pigment Production in P. verrucosus. J Fungi (Basel) 2024; 10:157. [PMID: 38392828 PMCID: PMC10889956 DOI: 10.3390/jof10020157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 01/25/2024] [Accepted: 02/13/2024] [Indexed: 02/24/2024] Open
Abstract
Fungi belonging to the genus Pseudogymnoascus have garnered increasing attention in recent years. One of the members of the genus, P. destructans, has been identified as the causal agent of a severe bat disease. Simultaneously, the knowledge of Pseudogymnoascus species has expanded, in parallel with the increased availability of genome sequences. Moreover, Pseudogymnoascus exhibits great potential as a producer of specialized metabolites, displaying a diverse array of biological activities. Despite these significant advancements, the genetic landscape of Pseudogymnoascus remains largely unexplored due to the scarcity of suitable molecular tools for genetic manipulation. In this study, we successfully implemented RNAi-mediated gene silencing and CRISPR/Cas9-mediated disruption in Pseudogymnoascus, using an Antarctic strain of Pseudogymnoascus verrucosus as a model. Both methods were applied to target azpA, a gene involved in red pigment biosynthesis. Silencing of the azpA gene to levels of 90% or higher eliminated red pigment production, resulting in transformants exhibiting a white phenotype. On the other hand, the CRISPR/Cas9 system led to a high percentage (73%) of transformants with a one-nucleotide insertion, thereby inactivating azpA and abolishing red pigment production, resulting in a white phenotype. The successful application of RNAi-mediated gene silencing and CRISPR/Cas9-mediated disruption represents a significant advancement in Pseudogymnoascus research, opening avenues for comprehensive functional genetic investigations within this underexplored fungal genus.
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Affiliation(s)
- Diego Palma
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
| | - Vicente Oliva
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
| | - Mariana Montanares
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
| | - Carlos Gil-Durán
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile
| | - Dante Travisany
- Núcleo de Investigación en Data Science, Facultad de Ingeniería y Negocios, Universidad de Las Américas, Santiago 7500975, Chile
| | - Renato Chávez
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Santiago 9170022, Chile
| | - Inmaculada Vaca
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
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4
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Liu HQ, Huang ZF, Yang SZ, Tian XF, Wu ZQ. Inducing red pigment and inhibiting citrinin production by adding lanthanum(III) ion in Monascus purpureus fermentation. Appl Microbiol Biotechnol 2021; 105:1905-12. [PMID: 33576885 DOI: 10.1007/s00253-021-11162-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/22/2021] [Accepted: 02/02/2021] [Indexed: 10/22/2022]
Abstract
Monascus pigments (MPs) are widely used natural colorants in Asian countries. The problems of low extracellular red pigment (ERP) and high citrinin remain to be solved in Monascus pigment production. The effect of lanthanum(III) ion (LaCl3) on Monascus purpureus fermentation was investigated in this study. The yields of ERP and biomass respectively reached maxima of 124.10 U/mL and 33.10 g/L by adding 0.4 g/L La3+ on the second day in the total 8-day fermentation; simultaneously, citrinin was decreased by 59.93% and 38.14% in the extracellular and intracellular fractions, respectively. Reactive oxygen species (ROS) levels were obviously improved by La3+ treatment, while the activities of catalase (CAT) and superoxide dismutase (SOD) were increased compared with the control. The ratio of unsaturated/saturated fatty acids in mycelia was increased from 2.94 to 3.49, indicating that the permeability and fluidity of the cell membrane were enhanced under La3+ treatment. Gene expression analysis showed that the relative expression levels of Monascus pigment synthesis genes (pksPT, mppB, mppD, MpFasB2, and MpPKS5) were significantly upregulated by La3+ treatment, and in contrast, the relative expression levels of citrinin synthesis genes (ctnA, pksCT and mppC) were markedly downregulated. This work confirmed that LaCl3 possesses the potential to induce red pigment biosynthesis and inhibit citrinin production in M. purpureus fermentation. KEY POINTS: • La3+ induced red pigment and inhibited citrinin production in Monascus fermentation. • La3+ regulated genes expression up for Monascus pigment and down for citrinin. • La3+ increased the UFAs in cell membrane to enhance the permeability and fluidity.
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Li L, Chen K, Dhungana N, Jang Y, Chaturvedi V, Desmond E. Characterization of Clinical Isolates of Talaromyces marneffei and Related Species, California, USA. Emerg Infect Dis 2020; 25:1765-1768. [PMID: 31441765 PMCID: PMC6711226 DOI: 10.3201/eid2509.190380] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Talaromyces marneffei and other Talaromyces species can cause opportunistic invasive fungal infections. We characterized clinical Talaromyces isolates from patients in California, USA, a non-Talaromyces-endemic area, by a multiphasic approach, including multigene phylogeny, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and phenotypic methods. We identified 10 potentially pathogenic Talaromyces isolates, 2 T. marneffei.
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6
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Tammaro A, Chello C, Magri F, Gelormini E, Parisella FR, Daniele A, Signati F, Persechino S, Raffa S. Atypical koebner phenomenon on a tattoo. J Cosmet Dermatol 2019; 19:1205-1207. [PMID: 31502739 DOI: 10.1111/jocd.13147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 08/02/2019] [Accepted: 08/13/2019] [Indexed: 11/30/2022]
Abstract
Tattooing is more and more popular in developed countries in recent years and many side effects are associated with this practice, including psoriatic lesions and Koebner phenomenon. We report the case of a lichenoid reaction to red pigment in a patient affected by psoriasis.
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Affiliation(s)
- Antonella Tammaro
- NESMOS Department - Dermatology, Sant'Andrea Hospital, "Sapienza" University of Rome, Rome, Italy
| | - Camilla Chello
- NESMOS Department - Dermatology, Sant'Andrea Hospital, "Sapienza" University of Rome, Rome, Italy
| | - Francesca Magri
- NESMOS Department - Dermatology, Sant'Andrea Hospital, "Sapienza" University of Rome, Rome, Italy
| | - Enza Gelormini
- NESMOS Department - Dermatology, Sant'Andrea Hospital, "Sapienza" University of Rome, Rome, Italy
| | | | - Alessandra Daniele
- NESMOS Department - Dermatology, Sant'Andrea Hospital, "Sapienza" University of Rome, Rome, Italy
| | - Federica Signati
- NESMOS Department - Dermatology, Sant'Andrea Hospital, "Sapienza" University of Rome, Rome, Italy
| | - Severino Persechino
- NESMOS Department - Dermatology, Sant'Andrea Hospital, "Sapienza" University of Rome, Rome, Italy
| | - Salvatore Raffa
- Department of Clinical and Molecular Medicine, Ultrastructural Pathology Lab, Sapienza University, Sant'Andrea Hospital, Rome, Italy
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7
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Sauvageau AP, Mojeski JA, Bax MJ, Bogner PN. Delayed-onset pseudoepitheliomatous hyperplasia reaction to red tattoo pigment resembling squamous cell carcinoma. JAAD Case Rep 2019; 5:222-224. [PMID: 30809565 PMCID: PMC6374962 DOI: 10.1016/j.jdcr.2018.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Affiliation(s)
- Andrew P Sauvageau
- Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York
| | - Jacob A Mojeski
- Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York
| | - Michael J Bax
- Department of Dermatology, Roswell Park Comprehensive Cancer Center, Buffalo, New York
| | - Paul N Bogner
- Department of Dermatology, Roswell Park Comprehensive Cancer Center, Buffalo, New York.,Department of Pathology, Roswell Park Comprehensive Cancer Center, Buffalo, New York
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8
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Iwaoka Y, Ikeda N, Ohno A, Ito H, Tai A. Antioxidant activity and Neurite outgrowth-enhancing activity of scorbamic acid and a red pigment derived from ascorbic acid. Nat Prod Res 2018; 34:838-842. [PMID: 30422002 DOI: 10.1080/14786419.2018.1499641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
L-Ascorbic acid (AA), known as vitamin C, can form browning products by a non-enzymatic process during storage and the browning products cause deterioration of agricultural products. In the browning reaction, a red pigment, 2,2´-nitrilodi-2(2´)-deoxy-L-ascorbic acid ammonium salt (NDA), is generated from AA via L-scorbamic acid (SCA) as an intermediate. However, the biological activities of SCA and NDA have not yet been clarified. In this study, we assayed the antioxidant activities of SCA and NDA using ABTS radical cation and their neurite outgrowth-enhancing activities in PC12 cells. SCA showed stronger radical-scavenging activity than that of AA, while NDA hardly showed any activity. SCA and NDA enhanced the neurite outgrowth induced by dibutyryl cyclic AMP after their incorporation into cells in the same manner as that of AA. The results indicated that SCA has antioxidant activity and that SCA and NDA have neurite outgrowth-enhancing activity.
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Affiliation(s)
- Yuji Iwaoka
- Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima, Japan
| | - Nao Ikeda
- Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima, Japan
| | - Asako Ohno
- Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima, Japan
| | - Hideyuki Ito
- Faculty of Health and Welfare Science, Okayama Prefectural University, Soja, Okayama, Japan
| | - Akihiro Tai
- Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima, Japan
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Chen X, Wei Z, Zhu L, Yuan X, Wei D, Peng W, Wu C. Efficient Approach for the Extraction and Identification of Red Pigment from Zanthoxylum bungeanum Maxim and Its Antioxidant Activity. Molecules 2018; 23:E1109. [PMID: 29738434 PMCID: PMC6100252 DOI: 10.3390/molecules23051109] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 04/25/2018] [Accepted: 04/27/2018] [Indexed: 12/18/2022] Open
Abstract
Red pigment (RP) was extracted from the peels of Zanthoxylum bungeanum Maxim (PZB) by ultrasonic-assisted extraction (UAE) in this work. Box⁻Behnken design⁻response surface methodology (BBD-RSM) was employed to research the efficiency of the RP extraction. Based on the optimization of RSM, results showed that the optimal extraction conditions were as follows: liquid⁻solid ratio of 31 mL/g, extraction time of 41 min, and extraction temperature of 27 °C, and under these conditions, the actual absorbance value was 0.615 ± 0.13%, highly agreeing with the predicted value by the model. Furthermore, ultra-performance liquid chromatography⁻mass spectrometry (UPLC-MS) was used to separate and analyze RP. The compounds of RP were mainly flavonoids, and there were five compounds detected for the first time in PZB. In addition, RP showed significant antioxidant activities in vitro, which could be developed for anti-aging candidate drugs and functional foods. In conclusion, ultrasound-assisted extraction with BBD-RSM and chromatographic separation technology with UPLC-MS are efficient strategies for the isolation and identification of RP from PZB.
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Affiliation(s)
- Xi Chen
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Zhiqiang Wei
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Lei Zhu
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Xing Yuan
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Daneng Wei
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Wei Peng
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Chunjie Wu
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
- Key Research Laboratory of Traditional Chinese Medicine Processing Technology, State Administration of Traditional Chinese Medicine of China, Chengdu 611137, China.
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10
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Lebeau J, Venkatachalam M, Fouillaud M, Petit T, Vinale F, Dufossé L, Caro Y. Production and New Extraction Method of Polyketide Red Pigments Produced by Ascomycetous Fungi from Terrestrial and Marine Habitats. J Fungi (Basel) 2017; 3:jof3030034. [PMID: 29371552 PMCID: PMC5715940 DOI: 10.3390/jof3030034] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 06/21/2017] [Accepted: 06/23/2017] [Indexed: 01/30/2023] Open
Abstract
The use of ascomycetous fungi as pigment producers opens the way to an alternative to synthetic dyes, especially in the red-dye industries, which have very few natural pigment alternatives. The present paper aimed to bio-prospect and screen out 15 selected ascomycetous fungal strains, originating from terrestrial and marine habitats belonging to seven different genera (Penicillium, Talaromyces, Fusarium, Aspergillus, Trichoderma, Dreschlera, and Paecilomyces). We identified four strains, Penicillium purpurogenum rubisclerotium, Fusarium oxysporum, marine strains identified as Talaromyces spp., and Trichoderma atroviride, as potential red pigment producers. The extraction of the pigments is a crucial step, whereby the qualitative and quantitative compositions of each fungal extract need to be respected for reliable identification, as well as preserving bioactivity. Furthermore, there is a growing demand for more sustainable and cost-effective extraction methods. Therefore, a pressurized liquid extraction technique was carried out in this study, allowing a greener and faster extraction step of the pigments, while preserving their chemical structures and bioactivities in comparison to conventional extraction processes. The protocol was illustrated with the production of pigment extracts from P. purpurogenum rubisclerotium and Talaromyces spp. Extracts were analyzed by high-performance liquid-chromatography combined with photodiode array-detection (HPLC-DAD) and high-resolution mass spectrometry (UHPLC-HRMS). The more promising strain was the isolate Talaromyces spp. of marine origin. The main polyketide pigment produced by this strain has been characterized as N-threoninerubropunctamine, a non-toxic red Monascus-like azaphilone pigment.
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Affiliation(s)
- Juliana Lebeau
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de la Réunion, F-97490 Sainte-Clotilde, Ile de la Réunion, France.
| | - Mekala Venkatachalam
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de la Réunion, F-97490 Sainte-Clotilde, Ile de la Réunion, France.
| | - Mireille Fouillaud
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de la Réunion, F-97490 Sainte-Clotilde, Ile de la Réunion, France.
| | - Thomas Petit
- UMR QualiSud, Université de la Réunion, IUT, F-97410 Saint-Pierre, Ile de la Réunion, France.
| | - Francesco Vinale
- Istituto per la Protezione Sostenibile delle Piante (IPSP-CNR) and Dipartimento di Agraria, Università degli Studi di Napoli Federico II, 80055 Portici, NA, Italy.
| | - Laurent Dufossé
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de la Réunion, F-97490 Sainte-Clotilde, Ile de la Réunion, France.
| | - Yanis Caro
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de la Réunion, F-97490 Sainte-Clotilde, Ile de la Réunion, France.
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Aguileta G, Badouin H, Hood ME, Møller AP, Le Prieur S, Snirc A, Siguenza S, Mousseau TA, Shykoff JA, Cuomo CA, Giraud T. Lower prevalence but similar fitness in a parasitic fungus at higher radiation levels near Chernobyl. Mol Ecol 2016; 25:3370-83. [PMID: 27136128 DOI: 10.1111/mec.13675] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 04/04/2016] [Accepted: 04/15/2016] [Indexed: 12/24/2022]
Abstract
Nuclear disasters at Chernobyl and Fukushima provide examples of effects of acute ionizing radiation on mutations that can affect the fitness and distribution of species. Here, we investigated the prevalence of Microbotryum lychnidis-dioicae, a pollinator-transmitted fungal pathogen of plants causing anther-smut disease in Chernobyl, its viability, fertility and karyotype variation, and the accumulation of nonsynonymous mutations in its genome. We collected diseased flowers of Silene latifolia from locations ranging by more than two orders of magnitude in background radiation, from 0.05 to 21.03 μGy/h. Disease prevalence decreased significantly with increasing radiation level, possibly due to lower pollinator abundance and altered pollinator behaviour. Viability and fertility, measured as the budding rate of haploid sporidia following meiosis from the diploid teliospores, did not vary with increasing radiation levels and neither did karyotype overall structure and level of chromosomal size heterozygosity. We sequenced the genomes of twelve samples from Chernobyl and of four samples collected from uncontaminated areas and analysed alignments of 6068 predicted genes, corresponding to 1.04 × 10(7) base pairs. We found no dose-dependent differences in substitution rates (neither dN, dS, nor dN/dS). Thus, we found no significant evidence of increased deleterious mutation rates at higher levels of background radiation in this plant pathogen. We even found lower levels of nonsynonymous substitution rates in contaminated areas compared to control regions, suggesting that purifying selection was stronger in contaminated than uncontaminated areas. We briefly discuss the possibilities for a mechanistic basis of radio resistance in this nonmelanized fungus.
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Affiliation(s)
- Gabriela Aguileta
- Ecologie Systématique Evolution, CNRS, Univ. Paris-Sud, AgroParisTech, Université Paris-Saclay, 91400, Orsay, France
| | - Helene Badouin
- Ecologie Systématique Evolution, CNRS, Univ. Paris-Sud, AgroParisTech, Université Paris-Saclay, 91400, Orsay, France
| | - Michael E Hood
- Biology Department, Amherst College, Amherst, MA 01002, USA
| | - Anders P Møller
- Ecologie Systématique Evolution, CNRS, Univ. Paris-Sud, AgroParisTech, Université Paris-Saclay, 91400, Orsay, France
| | - Stephanie Le Prieur
- Ecologie Systématique Evolution, CNRS, Univ. Paris-Sud, AgroParisTech, Université Paris-Saclay, 91400, Orsay, France
| | - Alodie Snirc
- Ecologie Systématique Evolution, CNRS, Univ. Paris-Sud, AgroParisTech, Université Paris-Saclay, 91400, Orsay, France
| | - Sophie Siguenza
- INRA, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR441, Castanet-Tolosan, F-31326, France.,CNRS, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR2594, Castanet-Tolosan, F-31326, France
| | - Timothy A Mousseau
- Department of Biological Sciences, University of South Carolina, Columbia, SC, 29208, USA
| | - Jacqui A Shykoff
- Ecologie Systématique Evolution, CNRS, Univ. Paris-Sud, AgroParisTech, Université Paris-Saclay, 91400, Orsay, France
| | | | - Tatiana Giraud
- Ecologie Systématique Evolution, CNRS, Univ. Paris-Sud, AgroParisTech, Université Paris-Saclay, 91400, Orsay, France
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Godinho MM, Aguinaga F, Grynszpan R, Lima VM, Azulay DR, Cuzzi T, Ramos-E-Silva M, Manela-Azulay M. Granulomatous reaction to red tattoo pigment treated with allopurinol. J Cosmet Dermatol 2015. [PMID: 26211454 DOI: 10.1111/jocd.12149] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Granulomatous reactions to tattoo ink are most commonly associated with mercury sulfide, a component of red pigments. Treatment options show limited results. Allopurinol, an inhibitor of xanthine oxidase, has been reported as a successful alternative treatment to granulomatous disorders, such as sarcoidosis and granulomatous reactions to fillers and tattoos. We report a case of granulomatous reaction to red tattoo pigment treated with allopurinol for 6 months. Good clinical improvement could be noticed during this time. Two months after we stopped the treatment, the lesion recurred. Allopurinol emerges as an important drug for the management of granulomatous reactions caused by tattoo pigments. Based on the significant clinical improvement noticed during its use, we recommend new studies to elucidate all the potential benefits of the use of allopurinol for the treatment of granulomatous reactions to tattoo ink.
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Affiliation(s)
- Mariana Marteleto Godinho
- Sector of Dermatology and Post-Graduation Course in Dermatology, University Hospital and School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Felipe Aguinaga
- Sector of Dermatology and Post-Graduation Course in Dermatology, University Hospital and School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rachel Grynszpan
- Sector of Dermatology and Post-Graduation Course in Dermatology, University Hospital and School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Victor Maselli Lima
- Sector of Plastic Surgery, Ivo Pitanguy Institute/Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - David Rubem Azulay
- Sector of Dermatology and Post-Graduation Course in Dermatology, University Hospital and School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Tullia Cuzzi
- Sector of Pathology and Post-Graduation Course, University Hospital and School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcia Ramos-E-Silva
- Sector of Dermatology and Post-Graduation Course in Dermatology, University Hospital and School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mônica Manela-Azulay
- Sector of Dermatology and Post-Graduation Course in Dermatology, University Hospital and School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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13
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Abstract
The function of anthocyanins in green, vegetative tissues has always been a contentious issue. Here we evaluate their proposed photoprotective function since recent findings have shown that anthocyanins reduce photoinhibition and photobleaching of chlorophyll under light stress conditions. Anthocyanins generally accumulate in peripheral tissues exposed to high irradiance, although there are some exceptions (e.g. accumulation in abaxial leaf tissues and in obligatory shade plants) and accumulation is usually transient. Anthocyanin accumulation requires light and generally coincides with periods of high excitation pressure and increased potential for photo-oxidative damage due to an imbalance between light capture, CO2 assimilation and carbohydrate utilization (e.g. greening of developing tissues, senescence and adverse environmental conditions). Light attenuation by anthocyanin may help to re-establish this balance and so reduce the risk of photo-oxidative damage. Although it has been suggested that anthocyanins may act as antioxidants, the association between anthocyanins and oxidative stress appears to relate to the ability of anthocyanins to reduce excitation pressure and, hence, the potential for oxidative damage. The various aspects of anthocyanin induction and pigmentation presented here are compatible with, and support, the proposed general role of anthocyanins as photoprotective light screens in vegetative tissues.
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Affiliation(s)
- W J Steyn
- Department of Horticultural Science, University of Stellenbosch, Private BagXI, 7602 Matieland, South Africa
| | - S J E Wand
- Department of Horticultural Science, University of Stellenbosch, Private BagXI, 7602 Matieland, South Africa
| | - D M Holcroft
- Department of Horticulture, Michigan State University, East Lansing, MI 48824-1325, USA
| | - G Jacobs
- Department of Horticultural Science, University of Stellenbosch, Private BagXI, 7602 Matieland, South Africa
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