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Li H, Nakajima Y, Nango E, Owada S, Yamada D, Hashimoto K, Luo F, Tanaka R, Akita F, Kato K, Kang J, Saitoh Y, Kishi S, Yu H, Matsubara N, Fujii H, Sugahara M, Suzuki M, Masuda T, Kimura T, Thao TN, Yonekura S, Yu LJ, Tosha T, Tono K, Joti Y, Hatsui T, Yabashi M, Kubo M, Iwata S, Isobe H, Yamaguchi K, Suga M, Shen JR. Oxygen-evolving photosystem II structures during S 1-S 2-S 3 transitions. Nature 2024; 626:670-677. [PMID: 38297122 PMCID: PMC10866707 DOI: 10.1038/s41586-023-06987-5] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 12/15/2023] [Indexed: 02/02/2024]
Abstract
Photosystem II (PSII) catalyses the oxidation of water through a four-step cycle of Si states (i = 0-4) at the Mn4CaO5 cluster1-3, during which an extra oxygen (O6) is incorporated at the S3 state to form a possible dioxygen4-7. Structural changes of the metal cluster and its environment during the S-state transitions have been studied on the microsecond timescale. Here we use pump-probe serial femtosecond crystallography to reveal the structural dynamics of PSII from nanoseconds to milliseconds after illumination with one flash (1F) or two flashes (2F). YZ, a tyrosine residue that connects the reaction centre P680 and the Mn4CaO5 cluster, showed structural changes on a nanosecond timescale, as did its surrounding amino acid residues and water molecules, reflecting the fast transfer of electrons and protons after flash illumination. Notably, one water molecule emerged in the vicinity of Glu189 of the D1 subunit of PSII (D1-E189), and was bound to the Ca2+ ion on a sub-microsecond timescale after 2F illumination. This water molecule disappeared later with the concomitant increase of O6, suggesting that it is the origin of O6. We also observed concerted movements of water molecules in the O1, O4 and Cl-1 channels and their surrounding amino acid residues to complete the sequence of electron transfer, proton release and substrate water delivery. These results provide crucial insights into the structural dynamics of PSII during S-state transitions as well as O-O bond formation.
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Affiliation(s)
- Hongjie Li
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Yoshiki Nakajima
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Eriko Nango
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan
- RIKEN SPring-8 Center, Sayo, Japan
| | - Shigeki Owada
- Japan Synchrotron Radiation Research Institute, Sayo, Japan
| | - Daichi Yamada
- Department of Picobiology, Graduate School of Life Science, University of Hyogo, Kobe, Japan
| | - Kana Hashimoto
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Fangjia Luo
- Japan Synchrotron Radiation Research Institute, Sayo, Japan
| | - Rie Tanaka
- RIKEN SPring-8 Center, Sayo, Japan
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Fusamichi Akita
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Koji Kato
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | | | - Yasunori Saitoh
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Shunpei Kishi
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Huaxin Yu
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Naoki Matsubara
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Hajime Fujii
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | | | - Mamoru Suzuki
- Institute for Protein Research, Osaka University, Osaka, Japan
| | - Tetsuya Masuda
- Division of Food and Nutrition, Faculty of Agriculture, Ryukoku University, Otsu, Japan
| | - Tetsunari Kimura
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Japan
| | - Tran Nguyen Thao
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Shinichiro Yonekura
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Long-Jiang Yu
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
- Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | | | - Kensuke Tono
- Japan Synchrotron Radiation Research Institute, Sayo, Japan
| | - Yasumasa Joti
- Japan Synchrotron Radiation Research Institute, Sayo, Japan
| | - Takaki Hatsui
- Japan Synchrotron Radiation Research Institute, Sayo, Japan
| | - Makina Yabashi
- Japan Synchrotron Radiation Research Institute, Sayo, Japan
| | - Minoru Kubo
- Department of Picobiology, Graduate School of Life Science, University of Hyogo, Kobe, Japan
| | - So Iwata
- RIKEN SPring-8 Center, Sayo, Japan
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroshi Isobe
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Kizashi Yamaguchi
- Center for Quantum Information and Quantum Biology, Osaka University, Osaka, Japan
| | - Michihiro Suga
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan.
| | - Jian-Ren Shen
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan.
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Piechowiak T, Skóra B, Balawejder M. Effect of postharvest nicotinamide treatment on NAD + metabolism and redox status in strawberry fruit during storage. Phytochemistry 2023; 213:113766. [PMID: 37343736 DOI: 10.1016/j.phytochem.2023.113766] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/11/2023] [Accepted: 06/12/2023] [Indexed: 06/23/2023]
Abstract
The increased activity of PARP enzymes is associated with a deficiency of NAD+, as well as with a loss of NADPH and ATP, and consequent deterioration of the redox state in fruits. In this study, we checked whether treatment with nicotinamide (NAM) would affect PARP-1 expression and NAD+ metabolism in strawberry fruit during storage. For this purpose, strawberry fruits were treated with 10 mM NAM and co-treated with NAM and UV-C, and then stored for 5 days at 4 °C. Research showed that nicotinamide contributes to reducing oxidative stress level by reducing PARP-1 mRNA gene expression and the protein level resulting in higher NAD+ availability, as well as improving energy metabolism and NADPH levels in fruits, regardless of whether they are exposed to UV-C. The above effects cause fruits treated with nicotinamide to be characterised by higher anti-radical activity, and a lower level of reactive oxygen species in the tissue.
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Affiliation(s)
- Tomasz Piechowiak
- Department of Chemistry and Food Toxicology, Institute of Food Technology and Nutrition, University of Rzeszow, St. Cwiklinskiej 1a, 35-601, Rzeszow, Poland.
| | - Bartosz Skóra
- Department of Biotechnology and Cell Biology, Medical College, University of Information Technology and Management in Rzeszow, St. Sucharskiego 2, 35-225, Rzeszow, Poland
| | - Maciej Balawejder
- Department of Chemistry and Food Toxicology, Institute of Food Technology and Nutrition, University of Rzeszow, St. Cwiklinskiej 1a, 35-601, Rzeszow, Poland
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Gupta A, Venkatesh AR, Arora K, Guptasarma P. Avoidance of the use of tryptophan in buried chromosomal proteins as a mechanism for reducing photo/oxidative damage to genomes. J Photochem Photobiol B 2023; 245:112733. [PMID: 37311303 DOI: 10.1016/j.jphotobiol.2023.112733] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/13/2023] [Accepted: 05/29/2023] [Indexed: 06/15/2023]
Abstract
In cells that are exposed to terrestrial sunlight, the indole moiety in the side chain of tryptophan (Trp) can suffer photo/oxidative damage (POD) by reactive oxygen species (ROS) and/or ultraviolet light (UV-B). Trp is oxidized to produce N-formylkynurenine (NFK), a UV-A-responsive photosensitizer that further degenerates into photosensitizers capable of generating ROS through exposure to visible light. Thus, Trp-containing proteins function as both victims, and perpetrators, of POD if they are not rapidly replaced through protein turnover. The literature indicates that protein turnover and DNA repair occur poorly in chromosomal interiors. We contend, therefore, that basic chromosomal proteins (BCPs) that are enveloped by DNA should have evolved to lack Trp residues in their amino acid sequences, since these could otherwise function as 'Trojan horse-type' DNA-damaging agents. Our global analyses of protein sequences demonstrates that BCPs consistently lack Trp residues, although DNA-binding proteins in general do not display such a lack. We employ HU-B (a wild-type, Trp-lacking bacterial BCP) and HU-B F47W (a mutant, Trp-containing form of the same bacterial BCP) to demonstrate that the possession of Trp is deleterious to BCPs and associated chromosomal DNA. Basically, we show that UV-B and UV-A (a) cause no POD in HU-B, but cause extensive POD in HU-B F47W (in vitro), as well as (b) only nominal DNA damage in bacteria expressing HU-B, but extensive DNA damage in bacteria expressing F47W HU-B (in vivo). Our results suggest that Trp-lacking BCPs could have evolved to reduce scope for protein-facilitated, sunlight-mediated damage of DNA by UV-A and visible light, within chromosomal interiors that are poorly serviced by protein turnover and DNA repair machinery.
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Affiliation(s)
- Archit Gupta
- Centre for Protein Science, Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector-81, SAS Nagar, Punjab 140306, India
| | - Achuthan Raja Venkatesh
- Centre for Protein Science, Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector-81, SAS Nagar, Punjab 140306, India
| | - Kanika Arora
- Centre for Protein Science, Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector-81, SAS Nagar, Punjab 140306, India
| | - Purnananda Guptasarma
- Centre for Protein Science, Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector-81, SAS Nagar, Punjab 140306, India.
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Zhang B, Zhu T, Liu L, Yuan L. In vitro electrochemical detection of the degradation of amyloid-β oligomers. J Colloid Interface Sci 2023; 629:156-165. [PMID: 36152573 DOI: 10.1016/j.jcis.2022.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 08/30/2022] [Accepted: 09/02/2022] [Indexed: 11/24/2022]
Abstract
The clearance of overloaded amyloid β (Aβ) oligomers is thought to be an attractive and potential strategy for the therapy of Alzheimer's disease (AD). A variety of strategies have already been utilized to study Aβ degradation in vitro. Here, the electrochemical detection based on direct electrooxidation of specific Tyr residues within Aβ peptide has been developed as a simple and robust approach for monitoring the oligomers' degradation. C60 was employed for photodegrading Aβ oligomers due to the generated ROS under light irradiation. The oxidation current of Tyr residues by square wave voltammetry (SWV) increased upon the Aβ degradation, confirming that the structure variation of Aβ peptide indeed influenced the exposure of those redox species to the electrode surface and final signal output. Chronoamperometric assay also found the electrooxidation of Tyr undergone an irreversible process. Additionally, the direct electrochemistry was capable of detecting the aggregation with rapid test and better sensitivity in compared with dynamic light scattering (DLS), atomic force microscopy (AFM) and thioflavin T (ThT) based fluorescence assay. Thus, this work indicated the potential application of direct electrochemistry in the in vitro measurement of Aβ degradation and clearance, providing new insights and a complementary means into the AD theranostics.
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Affiliation(s)
- Baole Zhang
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Taofeng Zhu
- Department of Pulmonary and Critical Care Medicine, Yixing Hospital Affiliated to Jiangsu University, Yixing 214200, Jiangsu, China
| | - Lei Liu
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China.
| | - Liang Yuan
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China.
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Yu Y, Wang T, Gong Y, Wang W, Wang X, Yu D, Wu F, Wang L. Effect of ultrasound on the structural characteristics and oxidative stability of walnut oil oleogel coated with soy protein isolate-phosphatidylserine. Ultrason Sonochem 2022; 83:105945. [PMID: 35149379 PMCID: PMC8841881 DOI: 10.1016/j.ultsonch.2022.105945] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/30/2022] [Accepted: 02/03/2022] [Indexed: 05/24/2023]
Abstract
In this study, the three-dimensional network system formed by rice bran wax (RBW) was used as the internal structure, and the external structure formed by soybean protein isolate (SPI) and phosphatidylserine (PS) was added on the basis of the internal structure to prepare walnut oil oleogel (SPI-PS-WOG). Ultrasonic treatment was applied to the mixed solution to make SPI-PS-WOG, on the basis, the effects of ultrasonic treatment on SPI-PS-WOG were investigated. The results showed that both β and β' crystalline forms were present in all SPI-PS-WOG samples. When the ultrasonic power was 450 W, the first weight loss peak in the thermogravimetric (TGA) curve appeared at 326 °C, which was shifted to the right compared to the peak that occurred when the ultrasonic power was 0 W, indicating that the thermal stability of the SPI-PS-WOG was improved by the ultrasonic treatment. Moreover, when the ultrasonic power was 450 W, the oil holding capacity (OHC) reached 95.3 %, which was the best compared with other groups. Both confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) showed that the ultrasonic treatment of appropriate power succeeded in making the SPI-PS-WOG samples more evenly dispersed in the internal structure and denser in the external structure. In terms of oxidative stability, it was found that the peroxide value of SPI-PS-WOG remained at 9.8 mmol/kg oil for 50 days under 450 W ultrasonic power treatment, which was significantly improved compared with liquid walnut oil (WO). These results provide a new idea for the preparation of oleogels, and also lay a theoretical foundation for the application of ultrasonic treatment in oleogels.
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Affiliation(s)
- Yingjie Yu
- School of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Tong Wang
- School of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Yuhang Gong
- School of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Weining Wang
- School of Computer and Information Engineering, Harbin University of Commerce, Harbin 150028, China
| | - Xue Wang
- School of Computer and Information Engineering, Harbin University of Commerce, Harbin 150028, China
| | - Dianyu Yu
- School of Food Science, Northeast Agricultural University, Harbin 150030, China.
| | - Fei Wu
- School of Food Science, Northeast Agricultural University, Harbin 150030, China.
| | - Liqi Wang
- School of Computer and Information Engineering, Harbin University of Commerce, Harbin 150028, China
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Okegawa Y, Tsuda N, Sakamoto W, Motohashi K. Maintaining the Chloroplast Redox Balance through the PGR5-Dependent Pathway and the Trx System Is Required for Light-Dependent Activation of Photosynthetic Reactions. Plant Cell Physiol 2022; 63:92-103. [PMID: 34623443 DOI: 10.1093/pcp/pcab148] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/26/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
Light-dependent activation of chloroplast enzymes is required for the rapid induction of photosynthesis after a shift from dark to light. The thioredoxin (Trx) system plays a central role in this process. In chloroplasts, the Trx system consists of two pathways: the ferredoxin (Fd)/Trx pathway and the nicotinamide adenine dinucleotide phosphate (NADPH)-Trx reductase C (NTRC) pathway. In Arabidopsis (Arabidopsis thaliana) mutants defective in either pathway, the photoreduction of thiol enzymes was impaired, resulting in decreased carbon fixation. The close relationship between the Fd/Trx pathway and proton gradient regulation 5 (PGR5)-dependent photosystem I cyclic electron transport (PSI CET) in the induction of photosynthesis was recently elucidated. However, how the PGR5-dependent pathway is involved in the NTRC pathway is unclear, although NTRC has been suggested to physically interact with PGR5. In this study, we analyzed Arabidopsis mutants lacking either the PGR5 or the chloroplast NADH dehydrogenase-like complex (NDH)-dependent PSI CET pathway in the ntrc mutant background. The ntrc pgr5 double mutant suppressed both the growth defects and the high non-photochemical quenching phenotype of the ntrc mutant when grown under long-day conditions. By contrast, the inactivation of NDH activity with the chlororespiratory reduction 2-2 mutant failed to suppress either phenotype. We discovered that the phenotypic rescue of ntrc by pgr5 is caused by the partial restoration of Trx-dependent reduction of thiol enzymes. These results suggest that electron partitioning to the PGR5-dependent pathway and the Trx system needs to be properly regulated for the activation of the Calvin-Benson-Bassham cycle enzymes during the induction of photosynthesis.
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Affiliation(s)
- Yuki Okegawa
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Okayama, 710-0046 Japan
- Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo Motoyama, Kita-ku, Kyoto, 603-8047 Japan
| | - Natsuki Tsuda
- Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo Motoyama, Kita-ku, Kyoto, 603-8047 Japan
| | - Wataru Sakamoto
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Okayama, 710-0046 Japan
| | - Ken Motohashi
- Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo Motoyama, Kita-ku, Kyoto, 603-8047 Japan
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Yablonskaya OI, Voeikov VL, Novikov KN, Buravleva EV, Menshov VA, Trofimov AV. Effect of Humid Air Exposed to IR Radiation on Enzyme Activity. Int J Mol Sci 2022; 23:ijms23020601. [PMID: 35054784 PMCID: PMC8775401 DOI: 10.3390/ijms23020601] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/30/2021] [Accepted: 01/03/2022] [Indexed: 11/17/2022] Open
Abstract
Water vapor absorbs well in the infra-red region of the electromagnetic spectrum. Absorption of radiant energy by water or water droplets leads to formation of exclusion zone water that possesses peculiar physico-chemical properties. In the course of this study, normally functioning and damaged alkaline phosphatase, horseradish peroxidase and catalase were treated with humid air irradiated with infrared light with a wavelength in the range of 1270 nm and referred to as coherent humidity (CoHu). One-minute long treatment with CoHu helped to partially protect enzymes from heat inactivation, mixed function oxidation, and loss of activity due to partial unfolding. Authors suggest that a possible mechanism underlying the observed effects involves altering the physicochemical properties of aqueous media while treatment of the objects with CoHu where CoHu acts as an intermediary.
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Affiliation(s)
- Olga I. Yablonskaya
- Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (V.A.M.); (A.V.T.)
- Correspondence:
| | - Vladimir L. Voeikov
- Faculty of Biology, Lomonosov Moscow State University, 119234 Moscow, Russia; (V.L.V.); (K.N.N.); (E.V.B.)
| | - Kirill N. Novikov
- Faculty of Biology, Lomonosov Moscow State University, 119234 Moscow, Russia; (V.L.V.); (K.N.N.); (E.V.B.)
| | - Ekaterina V. Buravleva
- Faculty of Biology, Lomonosov Moscow State University, 119234 Moscow, Russia; (V.L.V.); (K.N.N.); (E.V.B.)
| | - Valeriy A. Menshov
- Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (V.A.M.); (A.V.T.)
| | - Aleksei V. Trofimov
- Emanuel Institute of Biochemical Physics of Russian Academy of Sciences, 119334 Moscow, Russia; (V.A.M.); (A.V.T.)
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Celotti E, Lazaridis G, Figelj J, Scutaru Y, Natolino A. Comparison of a Rapid Light-Induced and Forced Test to Study the Oxidative Stability of White Wines. Molecules 2022; 27:molecules27010326. [PMID: 35011556 PMCID: PMC8746642 DOI: 10.3390/molecules27010326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 10/29/2021] [Revised: 12/27/2021] [Accepted: 12/31/2021] [Indexed: 11/16/2022] Open
Abstract
The oxidation processes of white wines can occur during storage and commercialization due to several factors, and these can negatively affect the color, aroma, and quality of the wine. Wineries should have faster and simpler methods that provide valuable information on oxidation stability of wines and allow fast decision-making procedures, able to trigger suitable technological interventions. Using a portable prototype instrument for light irradiations at different wavelengths and times was considered and evaluated on sensorial, spectrophotometric, and colorimetric parameters of white wines. The sensorial analysis revealed that white and light blue were the most significant, after only 1 h of irradiation. The experimental results showed that hydrogen peroxide could enhance the effect of light treatment, allowing a contemporary evaluation of the oxidation stability of wine against light and chemical stresses. As expected, a good correlation (R2 > 0.89) between optical density at 420 nm and b* parameter was highlighted. The synergic effect of light and H2O2 was also studied on the hydrolyzable and condensed tannins' additions to white wine. The proposed methodology could be used to evaluate the oxidative stability of white wines, but also to evaluate the effect of some oenological adjuvants on wine stability.
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Affiliation(s)
- Emilio Celotti
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy; (E.C.); (G.L.); (J.F.)
| | - Georgios Lazaridis
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy; (E.C.); (G.L.); (J.F.)
| | - Jakob Figelj
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy; (E.C.); (G.L.); (J.F.)
| | - Yuri Scutaru
- Department of Oenology and Chemistry, Technical University of Moldova, MD-2004 Chisinau, Moldova;
| | - Andrea Natolino
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy; (E.C.); (G.L.); (J.F.)
- Correspondence: ; Tel.: +39-0432-558376
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Ojeda V, Jiménez-López J, Romero-Campero FJ, Cejudo FJ, Pérez-Ruiz JM. A chloroplast redox relay adapts plastid metabolism to light and affects cytosolic protein quality control. Plant Physiol 2021; 187:88-102. [PMID: 34618130 PMCID: PMC8418392 DOI: 10.1093/plphys/kiab246] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 05/04/2021] [Indexed: 06/01/2023]
Abstract
In chloroplasts, thiol-dependent redox regulation is linked to light since the disulfide reductase activity of thioredoxins (Trxs) relies on photo-reduced ferredoxin (Fdx). Furthermore, chloroplasts harbor an NADPH-dependent Trx reductase (NTR) with a joint Trx domain, termed NTRC. The activity of these two redox systems is integrated by the redox balance of 2-Cys peroxiredoxin (Prx), which is controlled by NTRC. However, NTRC was proposed to participate in redox regulation of additional targets, prompting inquiry into whether the function of NTRC depends on its capacity to maintain the redox balance of 2-Cys Prxs or by direct redox interaction with chloroplast enzymes. To answer this, we studied the functional relationship of NTRC and 2-Cys Prxs by a comparative analysis of the triple Arabidopsis (Arabidopsis thaliana) mutant, ntrc-2cpab, which lacks NTRC and 2-Cys Prxs, and the double mutant 2cpab, which lacks 2-Cys Prxs. These mutants exhibit almost indistinguishable phenotypes: in growth rate, photosynthesis performance, and redox regulation of chloroplast enzymes in response to light and darkness. These results suggest that the most relevant function of NTRC is in controlling the redox balance of 2-Cys Prxs. A comparative transcriptomics analysis confirmed the phenotypic similarity of the two mutants and suggested that the NTRC-2-Cys Prxs system participates in cytosolic protein quality control. We propose that NTRC and 2-Cys Prxs constitute a redox relay, exclusive to photosynthetic organisms that fine-tunes the redox state of chloroplast enzymes in response to light and affects transduction pathways towards the cytosol.
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Affiliation(s)
- Valle Ojeda
- Instituto de Bioquímica Vegetal y Fotosíntesis, Universidad de Sevilla and Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio 49, 41092-Sevilla, Spain
| | - Julia Jiménez-López
- Instituto de Bioquímica Vegetal y Fotosíntesis, Universidad de Sevilla and Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio 49, 41092-Sevilla, Spain
| | - Francisco José Romero-Campero
- Instituto de Bioquímica Vegetal y Fotosíntesis, Universidad de Sevilla and Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio 49, 41092-Sevilla, Spain
| | - Francisco Javier Cejudo
- Instituto de Bioquímica Vegetal y Fotosíntesis, Universidad de Sevilla and Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio 49, 41092-Sevilla, Spain
| | - Juan Manuel Pérez-Ruiz
- Instituto de Bioquímica Vegetal y Fotosíntesis, Universidad de Sevilla and Consejo Superior de Investigaciones Científicas, Avda. Américo Vespucio 49, 41092-Sevilla, Spain
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10
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Allouche J, Rachmin I, Adhikari K, Pardo LM, Lee JH, McConnell AM, Kato S, Fan S, Kawakami A, Suita Y, Wakamatsu K, Igras V, Zhang J, Navarro PP, Lugo CM, Noonan HR, Christie KA, Itin K, Mujahid N, Lo JA, Won CH, Evans CL, Weng QY, Wang H, Osseiran S, Lovas A, Németh I, Cozzio A, Navarini AA, Hsiao JJ, Nguyen N, Kemény LV, Iliopoulos O, Berking C, Ruzicka T, Gonzalez-José R, Bortolini MC, Canizales-Quinteros S, Acuna-Alonso V, Gallo C, Poletti G, Bedoya G, Rothhammer F, Ito S, Schiaffino MV, Chao LH, Kleinstiver BP, Tishkoff S, Zon LI, Nijsten T, Ruiz-Linares A, Fisher DE, Roider E. NNT mediates redox-dependent pigmentation via a UVB- and MITF-independent mechanism. Cell 2021; 184:4268-4283.e20. [PMID: 34233163 PMCID: PMC8349839 DOI: 10.1016/j.cell.2021.06.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 03/09/2021] [Accepted: 06/15/2021] [Indexed: 12/26/2022]
Abstract
Ultraviolet (UV) light and incompletely understood genetic and epigenetic variations determine skin color. Here we describe an UV- and microphthalmia-associated transcription factor (MITF)-independent mechanism of skin pigmentation. Targeting the mitochondrial redox-regulating enzyme nicotinamide nucleotide transhydrogenase (NNT) resulted in cellular redox changes that affect tyrosinase degradation. These changes regulate melanosome maturation and, consequently, eumelanin levels and pigmentation. Topical application of small-molecule inhibitors yielded skin darkening in human skin, and mice with decreased NNT function displayed increased pigmentation. Additionally, genetic modification of NNT in zebrafish alters melanocytic pigmentation. Analysis of four diverse human cohorts revealed significant associations of skin color, tanning, and sun protection use with various single-nucleotide polymorphisms within NNT. NNT levels were independent of UVB irradiation and redox modulation. Individuals with postinflammatory hyperpigmentation or lentigines displayed decreased skin NNT levels, suggesting an NNT-driven, redox-dependent pigmentation mechanism that can be targeted with NNT-modifying topical drugs for medical and cosmetic purposes.
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Affiliation(s)
- Jennifer Allouche
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Inbal Rachmin
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Kaustubh Adhikari
- School of Mathematics and Statistics, The Open University, Milton Keynes, MK7 6AA, UK; Department of Genetics, Evolution and Environment and UCL Genetics Institute, University College London, London WC1E 6BT, UK
| | - Luba M Pardo
- Department of Dermatology, Erasmus Medical Center, 3015 Rotterdam, the Netherlands
| | - Ju Hee Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, 03722 Seoul, Korea
| | - Alicia M McConnell
- Stem Cell Program and Division of Hematology/Oncology, Boston Children's Hospital and the Howard Hughes Medical Institute, Boston, MA 02115, USA
| | - Shinichiro Kato
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA; Department of Immunology, Center for 5D Cell Dynamics, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Shaohua Fan
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Fudan University, 200438 Shanghai, China
| | - Akinori Kawakami
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Yusuke Suita
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Kazumasa Wakamatsu
- Institute for Melanin Chemistry, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Vivien Igras
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Jianming Zhang
- National Research Center for Translational Medicine (Shanghai), State Key Laboratory of Medical Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025 Shanghai, China
| | - Paula P Navarro
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Camila Makhlouta Lugo
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Haley R Noonan
- Stem Cell Program and Division of Hematology/Oncology, Boston Children's Hospital and the Howard Hughes Medical Institute, Boston, MA 02115, USA
| | - Kathleen A Christie
- Center for Genomic Medicine and Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Pathology, Harvard Medical School, Boston, MA 02115, USA
| | - Kaspar Itin
- Department of Dermatology, University Hospital of Basel, 4031 Basel, Switzerland
| | - Nisma Mujahid
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA; Boston University School of Medicine, Boston, MA 02118, USA; University of Utah, Department of Dermatology, Salt Lake City, UT 84132, USA
| | - Jennifer A Lo
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Chong Hyun Won
- Department of Dermatology, Asan Medical Center, Ulsan University College of Medicine, 05505 Seoul, Korea
| | - Conor L Evans
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Qing Yu Weng
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Hequn Wang
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Sam Osseiran
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Alyssa Lovas
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - István Németh
- Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary
| | - Antonio Cozzio
- Department of Dermatology, Venerology, and Allergology, Kantonsspital St. Gallen, 9007 St. Gallen, Switzerland
| | - Alexander A Navarini
- Department of Dermatology, University Hospital of Basel, 4031 Basel, Switzerland
| | - Jennifer J Hsiao
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Nhu Nguyen
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Lajos V Kemény
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA; Department of Dermatology, Venereology, and Dermatooncology, Semmelweis University, 1085 Budapest, Hungary
| | - Othon Iliopoulos
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA 02114, USA
| | - Carola Berking
- Department of Dermatology, Universitätsklinikum Erlangen, Friedrich Alexander University Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Thomas Ruzicka
- Department of Dermatology and Allergy, University Hospital Munich, Ludwig Maximilian University, 80337 Munich, Germany
| | - Rolando Gonzalez-José
- Instituto Patagónico de Ciencias Sociales y Humanas-Centro Nacional Patagónico, CONICET, Puerto Madryn U912OACD, Argentina
| | - Maria-Cátira Bortolini
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre 91501-970, Brazil
| | - Samuel Canizales-Quinteros
- Unidad de Genómica de Poblaciones Aplicada a la Salud, Facultad de Química, Universidad Nacional Autónoma de México e Instituto Nacional de Medicina Genómica, Mexico City 04510, Mexico
| | | | - Carla Gallo
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima 15102, Peru
| | - Giovanni Poletti
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima 15102, Peru
| | - Gabriel Bedoya
- Genética Molecular (GENMOL), Universidad de Antioquia, Medellín 5001000, Colombia
| | - Francisco Rothhammer
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000009, Chile; Programa de Genetica Humana, ICBM, Facultad de Medicina, Universidad de Chile, Santiago 1027, Chile
| | - Shosuke Ito
- Institute for Melanin Chemistry, Fujita Health University, Toyoake, Aichi 470-1192, Japan
| | - Maria Vittoria Schiaffino
- Internal Medicine, Diabetes and Endocrinology Unit, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Luke H Chao
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Benjamin P Kleinstiver
- Center for Genomic Medicine and Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Pathology, Harvard Medical School, Boston, MA 02115, USA
| | - Sarah Tishkoff
- Departments of Genetics and Biology, University of Pennsylvania, Philadelphia, PA, USA
| | - Leonard I Zon
- Stem Cell Program and Division of Hematology/Oncology, Boston Children's Hospital and the Howard Hughes Medical Institute, Boston, MA 02115, USA
| | - Tamar Nijsten
- Department of Dermatology, Erasmus Medical Center, 3015 Rotterdam, the Netherlands
| | - Andrés Ruiz-Linares
- Ministry of Education Key Laboratory of Contemporary Anthropology and Collaborative Innovation Center of Genetics and Development, School of Life Sciences and Human Phenome Institute, Fudan University, Shanghai 200433, China; UMR 7268, CNRS-EFS-ADES, Aix-Marseille University, Marseille 13005, France
| | - David E Fisher
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA; Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA 02114, USA.
| | - Elisabeth Roider
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA; Department of Dermatology, University Hospital of Basel, 4031 Basel, Switzerland; Department of Dermatology and Allergology, University of Szeged, 6720 Szeged, Hungary.
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11
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Haber Z, Lampl N, Meyer AJ, Zelinger E, Hipsch M, Rosenwasser S. Resolving diurnal dynamics of the chloroplastic glutathione redox state in Arabidopsis reveals its photosynthetically derived oxidation. Plant Cell 2021; 33:1828-1844. [PMID: 33624811 PMCID: PMC8254480 DOI: 10.1093/plcell/koab068] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 02/23/2021] [Indexed: 05/05/2023]
Abstract
Plants are subjected to fluctuations in light intensity, and this might cause unbalanced photosynthetic electron fluxes and overproduction of reactive oxygen species (ROS). Electrons needed for ROS detoxification are drawn, at least partially, from the cellular glutathione (GSH) pool via the ascorbate-glutathione cycle. Here, we explore the dynamics of the chloroplastic glutathione redox potential (chl-EGSH) using high-temporal-resolution monitoring of Arabidopsis (Arabidopsis thaliana) lines expressing the reduction-oxidation sensitive green fluorescent protein 2 (roGFP2) in chloroplasts. This was carried out over several days under dynamic environmental conditions and in correlation with PSII operating efficiency. Peaks in chl-EGSH oxidation during dark-to-light and light-to-dark transitions were observed. Increasing light intensities triggered a binary oxidation response, with a threshold around the light saturating point, suggesting two regulated oxidative states of the chl-EGSH. These patterns were not affected in npq1 plants, which are impaired in non-photochemical quenching. Oscillations between the two oxidation states were observed under fluctuating light in WT and npq1 plants, but not in pgr5 plants, suggesting a role for PSI photoinhibition in regulating the chl-EGSH dynamics. Remarkably, pgr5 plants showed an increase in chl-EGSH oxidation during the nights following light stresses, linking daytime photoinhibition and nighttime GSH metabolism. This work provides a systematic view of the dynamics of the in vivo chloroplastic glutathione redox state during varying light conditions.
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Affiliation(s)
- Zechariah Haber
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture,
The Hebrew University of Jerusalem, Rehovot 7610000, Israel
| | - Nardy Lampl
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture,
The Hebrew University of Jerusalem, Rehovot 7610000, Israel
| | - Andreas J Meyer
- Institute of Crop Science and Resource Conservation (INRES), Rheinische
Friedrich–Wilhelms Universität Bonn, Friedrich-Ebert-Allee 144, D-53113
Bonn, Germany
| | - Einat Zelinger
- The Interdepartmental Equipment Unit, The Robert H. Smith Faculty of
Agriculture, Food and Environment, The Hebrew University of Jerusalem,
Rehovot 7610001, Israel
| | - Matanel Hipsch
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture,
The Hebrew University of Jerusalem, Rehovot 7610000, Israel
| | - Shilo Rosenwasser
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture,
The Hebrew University of Jerusalem, Rehovot 7610000, Israel
- Author for correspondence:
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12
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Castellani ME, Verlet JRR. Intramolecular Photo-Oxidation as a Potential Source to Probe Biological Electron Damage: A Carboxylated Adenosine Analogue as Case Study. Molecules 2021; 26:2877. [PMID: 34067988 PMCID: PMC8152231 DOI: 10.3390/molecules26102877] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/05/2021] [Accepted: 05/10/2021] [Indexed: 11/16/2022] Open
Abstract
A carboxylated adenosine analog (C-Ado-) has been synthesized and probed via time-resolved photoelectron spectroscopy in order to induce intra-molecular charge transfer from the carboxylic acid moiety to the nucleobase. Intra-molecular charge transfer can be exploited as starting point to probe low-energy electron (LEE) damage in DNA and its derivatives. Time-dependent density functional theory (TD-DFT) calculations at the B3LYP-6311G level of theory have been performed to verify that the highest occupied molecular orbital (HOMO) was located on carboxylic acid and that the lowest occupied molecular orbital (LUMO) was on the nucleobase. Hence, the carboxylic acid could work as electron source, whilst the nucleobase could serve the purpose of electron acceptor. The dynamics following excitation at 4.66 eV (266 nm) were probed using time-resolved photoelectron spectroscopy using probes at 1.55 eV (800 nm) and 3.10 eV (400 nm). The data show rapid decay of the excited state population and, based on the similarity of the overall dynamics to deoxy-adenosine monophosphate (dAMP-), it appears that the dominant decay mechanism is internal conversion following 1ππ* excitation of the nucleobase, rather than charge-transfer from the carboxylic acid to the nucleobase.
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13
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Iosageanu A, Ilie D, Craciunescu O, Seciu-Grama AM, Oancea A, Zarnescu O, Moraru I, Oancea F. Effect of Fish Bone Bioactive Peptides on Oxidative, Inflammatory and Pigmentation Processes Triggered by UVB Irradiation in Skin Cells. Molecules 2021; 26:2691. [PMID: 34064423 PMCID: PMC8124703 DOI: 10.3390/molecules26092691] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 04/30/2021] [Accepted: 05/03/2021] [Indexed: 01/06/2023] Open
Abstract
In the present study, we evaluated for the first time the photoprotective effect of fish bone bioactive peptides (FBBP) preparation isolated from silver carp (Hypophthalmichthys molitrix) discarded tissue using in vitro experimental models of skin cells exposed to ultraviolet B (UVB) irradiation and stressing agents. FBBP preparation was obtained by papain treatment of minced bones and centrifugal ultrafiltration, and the molecular weight (MW) distribution was characterized by size exclusion and reversed-phase high performance liquid chromatography (RP-HPLC). In vitro assessment of the effect of FBBP pretreatment in UVB-irradiated L929 fibroblasts and HaCaT keratinocytes revealed their cytoprotective activity. Their capacity to efficiently reduce reactive oxygen species (ROS) production and lipid peroxidation varied in a dose-dependent manner, and it was greater in fibroblasts. A decrease of proinflammatory cytokines secretion, in particular of tumor necrosis factor alpha (TNF-α), was found after FBBP pretreatment of THP-1-derived inflamed macrophages. Melanin production and tyrosinase activity investigated in UVB-irradiated Mel-Juso cells were lowered in direct relation to FBBP concentrations. FBBP fractions with high radical scavenging activity were separated by ion exchange chromatography, and two collagenic sequences were identified. All these results offer new scientific data on aquaculture fish bone-derived peptides confirming their ability to control the antioxidant, anti-inflammatory and pigmentation processes developed during UV irradiation of skin cells and recommend their use as valuable natural ingredients of photoprotective cosmeceutical products.
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Affiliation(s)
- Andreea Iosageanu
- National Institute of R&D for Biological Sciences, 296, Splaiul Independentei, 060031 Bucharest, Romania; (A.I.); (D.I.); (A.-M.S.-G.); (A.O.)
| | - Daniela Ilie
- National Institute of R&D for Biological Sciences, 296, Splaiul Independentei, 060031 Bucharest, Romania; (A.I.); (D.I.); (A.-M.S.-G.); (A.O.)
| | - Oana Craciunescu
- National Institute of R&D for Biological Sciences, 296, Splaiul Independentei, 060031 Bucharest, Romania; (A.I.); (D.I.); (A.-M.S.-G.); (A.O.)
| | - Ana-Maria Seciu-Grama
- National Institute of R&D for Biological Sciences, 296, Splaiul Independentei, 060031 Bucharest, Romania; (A.I.); (D.I.); (A.-M.S.-G.); (A.O.)
| | - Anca Oancea
- National Institute of R&D for Biological Sciences, 296, Splaiul Independentei, 060031 Bucharest, Romania; (A.I.); (D.I.); (A.-M.S.-G.); (A.O.)
| | - Otilia Zarnescu
- Faculty of Biology, University of Bucharest, 91-95, Splaiul Independentei, 050095 Bucharest, Romania;
| | - Ionut Moraru
- Laboratoarele Medica SRL, 11, Frasinului Street, 075100 Otopeni, Romania;
| | - Florin Oancea
- National Institute for R&D in Chemistry and Petrochemistry—Icechim, 202, Splaiul Independentei, 060021 Bucharest, Romania;
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14
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Bruckbauer ST, Minkoff BB, Sussman MR, Cox MM. Proteome Damage Inflicted by Ionizing Radiation: Advancing a Theme in the Research of Miroslav Radman. Cells 2021; 10:cells10040954. [PMID: 33924085 PMCID: PMC8074248 DOI: 10.3390/cells10040954] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 02/03/2023] Open
Abstract
Oxidative proteome damage has been implicated as a major contributor to cell death and aging. Protein damage and aging has been a particular theme of the recent research of Miroslav Radman. However, the study of how cellular proteins are damaged by oxidative processes is still in its infancy. Here we examine oxidative changes in the proteomes of four bacterial populations—wild type E. coli, two isolates from E. coli populations evolved for high levels of ionizing radiation (IR) resistance, and D. radiodurans—immediately following exposure to 3000 Gy of ionizing radiation. By a substantial margin, the most prominent intracellular oxidation events involve hydroxylation of methionine residues. Significant but much less frequent are carbonylation events on tyrosine and dioxidation events on tryptophan. A few proteins are exquisitely sensitive to targeted oxidation events, notably the active site of glyceraldehyde 3-phosphate dehydrogenase (GAPDH) in E. coli. Extensive experimental evolution of E. coli for IR resistance has decreased overall proteome sensitivity to oxidation but not to the level seen in D. radiodurans. Many observed oxidation events may reflect aspects of protein structure and/or exposure of protein surfaces to water. Proteins such as GAPDH and possibly Ef-Tu may have an evolved sensitivity to oxidation by H2O2.
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Affiliation(s)
- Steven T. Bruckbauer
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA; (S.T.B.); (M.R.S.)
| | - Benjamin B. Minkoff
- Center for Genomic Science Innovation, University of Wisconsin-Madison, Madison, WI 53706, USA;
| | - Michael R. Sussman
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA; (S.T.B.); (M.R.S.)
- Center for Genomic Science Innovation, University of Wisconsin-Madison, Madison, WI 53706, USA;
| | - Michael M. Cox
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA; (S.T.B.); (M.R.S.)
- Correspondence:
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15
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Shen S, Wang Y, Dong J, Zhang R, Parikh A, Chen JG, Hu D. Mimicking Thylakoid Membrane with Chlorophyll/TiO 2/Lipid Co-Assembly for Light-Harvesting and Oxygen Releasing. ACS Appl Mater Interfaces 2021; 13:11461-11469. [PMID: 33634696 DOI: 10.1021/acsami.0c21662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
There is a growing interest in the design and construction of artificial photosythetic materials for solar energy utilization and conversion. Inspired by the structure of thylakoid membrane, we present here a hybrid construct for light-harvesting and oxygen releasing. Our design conjugates chlorophyll to TiO2 in a native-like membrane environment. The natural bilayer structure of lipids is utilized to localize the amphiphilic chlorophyll a and hydrophobic tetrabutyl titanate TBOT in the liposomal membrane during hydration process. The coassembled structure, which mimics the essential organization of the thylakoid membrane, is characterized using a combination of field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrometer (EDS), Ramam spectra, pressure (π)-area (Α) isotherms, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) analysis. Our results demonstrate successful insertation of chlorophyll a in the membrane and confirm the in situ formation of TiO2 nanoshell confined at the lipid bilayer/water interface. We further show that the hybrid liposomes exhibit unambiguous photoactivity in visible light-harvesting and oxygen release, likely resulting from a larger specific surface area of the TiO2 shell, an efficient interfacial conjugation of the chlorophyll molecules with the thin TiO2 layer. The density functional theory (DFT) calculations were in accordance with the eletron injection processes.We expect that the present work will open a new insight into interfacial recombination between light-harvesting pigments and their sensitized photocatalysis, and develop a new kind of artificial photosynthetic materials with zero-cost of environmental degradation and high efficiency for the photocatalytic O2 production.
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Affiliation(s)
- Shukun Shen
- School of Materials Science & Engineering, Shaanxi Normal University, Xi'an 710062, China
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an 710119, China
| | - Yiyun Wang
- School of Materials Science & Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Jingxuan Dong
- School of Materials Science & Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Rui Zhang
- School of Materials Science & Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Atul Parikh
- Department of Applied Science, University of California, Davis, CA95616, United States
| | - Jian-Gang Chen
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an 710119, China
| | - Daodao Hu
- School of Materials Science & Engineering, Shaanxi Normal University, Xi'an 710062, China
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an 710119, China
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16
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Kataoka T, Kanzaki N, Sakoda A, Shuto H, Yano J, Naoe S, Tanaka H, Hanamoto K, Terato H, Mitsunobu F, Yamaoka K. Evaluation of the redox state in mouse organs following radon inhalation. J Radiat Res 2021; 62:206-216. [PMID: 33503655 PMCID: PMC7948851 DOI: 10.1093/jrr/rraa129] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/03/2020] [Indexed: 05/30/2023]
Abstract
Radon inhalation activates antioxidative functions in mouse organs, thereby contributing to inhibition of oxidative stress-induced damage. However, the specific redox state of each organ after radon inhalation has not been reported. Therefore, in this study, we evaluated the redox state of various organs in mice following radon inhalation at concentrations of 2 or 20 kBq/m3 for 1, 3 or 10 days. Scatter plots were used to evaluate the relationship between antioxidative function and oxidative stress by principal component analysis (PCA) of data from control mice subjected to sham inhalation. The results of principal component (PC) 1 showed that the liver and kidney had high antioxidant capacity; the results of PC2 showed that the brain, pancreas and stomach had low antioxidant capacities and low lipid peroxide (LPO) content, whereas the lungs, heart, small intestine and large intestine had high LPO content but low antioxidant capacities. Furthermore, using the PCA of each obtained cluster, we observed altered correlation coefficients related to glutathione, hydrogen peroxide and LPO for all groups following radon inhalation. Correlation coefficients related to superoxide dismutase in organs with a low antioxidant capacity were also changed. These findings suggested that radon inhalation could alter the redox state in organs; however, its characteristics were dependent on the total antioxidant capacity of the organs as well as the radon concentration and inhalation time. The insights obtained from this study could be useful for developing therapeutic strategies targeting individual organs.
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Affiliation(s)
- Takahiro Kataoka
- Graduate School of Health Sciences, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Norie Kanzaki
- Ningyo-toge Environmental Engineering Center, Japan Atomic Energy Agency, 1550 Kamisaibara, Kagamino-cho, Tomata-gun, Okayama 708-0698, Japan
| | - Akihiro Sakoda
- Ningyo-toge Environmental Engineering Center, Japan Atomic Energy Agency, 1550 Kamisaibara, Kagamino-cho, Tomata-gun, Okayama 708-0698, Japan
| | - Hina Shuto
- Graduate School of Health Sciences, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Junki Yano
- Graduate School of Health Sciences, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Shota Naoe
- Graduate School of Health Sciences, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Hiroshi Tanaka
- Ningyo-toge Environmental Engineering Center, Japan Atomic Energy Agency, 1550 Kamisaibara, Kagamino-cho, Tomata-gun, Okayama 708-0698, Japan
| | - Katsumi Hanamoto
- Graduate School of Health Sciences, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Hiroaki Terato
- Advanced Science Research Center, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Fumihiro Mitsunobu
- Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Kiyonori Yamaoka
- Graduate School of Health Sciences, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
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17
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Torregrosa-Chinillach A, Chinchilla R. Synthesis of Xanthones, Thioxanthones and Acridones by a Metal-Free Photocatalytic Oxidation Using Visible Light and Molecular Oxygen. Molecules 2021; 26:molecules26040974. [PMID: 33673146 PMCID: PMC7918112 DOI: 10.3390/molecules26040974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 12/30/2020] [Revised: 02/03/2021] [Accepted: 02/09/2021] [Indexed: 11/22/2022] Open
Abstract
9H-Xanthenes, 9H-thioxanthenes and 9,10-dihydroacridines can be easily oxidized to the corresponding xanthones, thioxanthones and acridones, respectively, by a simple photo-oxidation procedure carried out using molecular oxygen as oxidant under the irradiation of visible blue light and in the presence of riboflavin tetraacetate as a metal-free photocatalyst. The obtained yields are high or quantitative.
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18
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Impano S, Yang H, Jodts RJ, Pagnier A, Swimley R, McDaniel EC, Shepard EM, Broderick WE, Broderick JB, Hoffman BM. Active-Site Controlled, Jahn-Teller Enabled Regioselectivity in Reductive S-C Bond Cleavage of S-Adenosylmethionine in Radical SAM Enzymes. J Am Chem Soc 2021; 143:335-348. [PMID: 33372786 PMCID: PMC7934139 DOI: 10.1021/jacs.0c10925] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Catalysis by canonical radical S-adenosyl-l-methionine (SAM) enzymes involves electron transfer (ET) from [4Fe-4S]+ to SAM, generating an R3S0 radical that undergoes regioselective homolytic reductive cleavage of the S-C5' bond to generate the 5'-dAdo· radical. However, cryogenic photoinduced S-C bond cleavage has regioselectively yielded either 5'-dAdo· or ·CH3, and indeed, each of the three SAM S-C bonds can be regioselectively cleaved in an RS enzyme. This diversity highlights a longstanding central question: what controls regioselective homolytic S-C bond cleavage upon SAM reduction? We here provide an unexpected answer, founded on our observation that photoinduced S-C bond cleavage in multiple canonical RS enzymes reveals two enzyme classes: in one, photolysis forms 5'-dAdo·, and in another it forms ·CH3. The identity of the cleaved S-C bond correlates with SAM ribose conformation but not with positioning and orientation of the sulfonium center relative to the [4Fe-4S] cluster. We have recognized the reduced-SAM R3S0 radical is a (2E) state with its antibonding unpaired electron in an orbital doublet, which renders R3S0 Jahn-Teller (JT)-active and therefore subject to vibronically induced distortion. Active-site forces induce a JT distortion that localizes the odd electron in a single priority S-C antibond, which undergoes regioselective cleavage. In photolytic cleavage those forces act through control of the ribose conformation and are transmitted to the sulfur via the S-C5' bond, but during catalysis thermally induced conformational changes that enable ET from a cluster iron generate dominant additional forces that specifically select S-C5' for cleavage. This motion also can explain how 5'-dAdo· subsequently forms the organometallic intermediate Ω.
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Affiliation(s)
- Stella Impano
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Hao Yang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Richard J Jodts
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Adrien Pagnier
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Ryan Swimley
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Elizabeth C McDaniel
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Eric M Shepard
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - William E Broderick
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Joan B Broderick
- Department of Chemistry & Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Brian M Hoffman
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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19
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Dadgar S, Troncoso JR, Siegel ER, Curry NM, Griffin RJ, Dings RPM, Rajaram N. Spectroscopic investigation of radiation-induced reoxygenation in radiation-resistant tumors. Neoplasia 2021; 23:49-57. [PMID: 33220616 PMCID: PMC7683290 DOI: 10.1016/j.neo.2020.11.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/29/2020] [Accepted: 11/03/2020] [Indexed: 12/12/2022]
Abstract
Fractionated radiation therapy is believed to reoxygenate and subsequently radiosensitize surviving hypoxic cancer cells. Measuring tumor reoxygenation between radiation fractions could conceivably provide an early biomarker of treatment response. However, the relationship between tumor reoxygenation and local control is not well understood. We used noninvasive optical fiber-based diffuse reflectance spectroscopy to monitor radiation-induced changes in hemoglobin oxygen saturation (sO2) in tumor xenografts grown from two head and neck squamous cell carcinoma cell lines - UM-SCC-22B and UM-SCC-47. Tumors were treated with 4 doses of 2 Gy over 2 consecutive weeks and diffuse reflectance spectra were acquired every day during the 2-week period. There was a statistically significant increase in sO2 in the treatment-responsive UM-SCC-22B tumors immediately following radiation. This reoxygenation trend was due to an increase in oxygenated hemoglobin (HbO2) and disappeared over the next 48 h as sO2 returned to preradiation baseline values. Conversely, sO2 in the relatively radiation-resistant UM-SCC-47 tumors increased after every dose of radiation and was driven by a significant decrease in deoxygenated hemoglobin (dHb). Immunohistochemical analysis revealed significantly elevated expression of hypoxia-inducible factor (HIF-1) in the UM-SCC-47 tumors prior to radiation and up to 48 h postradiation compared with the UM-SCC-22B tumors. Our observation of a decrease in dHb, a corresponding increase in sO2, as well as greater HIF-1α expression only in UM-SCC-47 tumors strongly suggests that the reoxygenation within these tumors is due to a decrease in oxygen consumption in the cancer cells, which could potentially play a role in promoting radiation resistance.
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Affiliation(s)
- Sina Dadgar
- Department of Biomedical Engineering, University of Arkansas, Fayetteville, AR, USA
| | | | - Eric R Siegel
- Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Natalie M Curry
- Department of Biomedical Engineering, University of Arkansas, Fayetteville, AR, USA
| | - Robert J Griffin
- Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Ruud P M Dings
- Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Narasimhan Rajaram
- Department of Biomedical Engineering, University of Arkansas, Fayetteville, AR, USA.
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20
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Sun C, Limbach PA, Addepalli B. Characterization of UVA-Induced Alterations to Transfer RNA Sequences. Biomolecules 2020; 10:biom10111527. [PMID: 33171700 PMCID: PMC7695249 DOI: 10.3390/biom10111527] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/02/2020] [Accepted: 11/05/2020] [Indexed: 02/07/2023] Open
Abstract
Ultraviolet radiation (UVR) adversely affects the integrity of DNA, RNA, and their nucleoside modifications. By employing liquid chromatography–tandem mass spectrometry (LC–MS/MS)-based RNA modification mapping approaches, we identified the transfer RNA (tRNA) regions most vulnerable to photooxidation. Photooxidative damage to the anticodon and variable loop regions was consistently observed in both modified and unmodified sequences of tRNA upon UVA (λ 370 nm) exposure. The extent of oxidative damage measured in terms of oxidized guanosine, however, was higher in unmodified RNA compared to its modified version, suggesting an auxiliary role for nucleoside modifications. The type of oxidation product formed in the anticodon stem–loop region varied with the modification type, status, and whether the tRNA was inside or outside the cell during exposure. Oligonucleotide-based characterization of tRNA following UVA exposure also revealed the presence of novel photoproducts and stable intermediates not observed by nucleoside analysis alone. This approach provides sequence-specific information revealing potential hotspots for UVA-induced damage in tRNAs.
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21
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Kerns ML, Miller RJ, Mazhar M, Byrd AS, Archer NK, Pinkser BL, Lew L, Dillen CA, Wang R, Miller LS, Chien AL, Kang S. Pathogenic and therapeutic role for NRF2 signaling in ultraviolet light-induced skin pigmentation. JCI Insight 2020; 5:139342. [PMID: 33001866 PMCID: PMC7605539 DOI: 10.1172/jci.insight.139342] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 09/16/2020] [Indexed: 01/06/2023] Open
Abstract
Mottled skin pigmentation and solar lentigines from chronic photodamage with aging involve complex interactions between keratinocytes and melanocytes. However, the precise signaling mechanisms that could serve as therapeutic targets are unclear. Herein, we report that expression of nuclear factor erythroid 2-related factor 2 (NRF2), which regulates reduction-oxidation reactions, is altered in solar lentigines and photodamaged skin. Moreover, mottled skin pigmentation in humans could be treated with topical application of the NRF2 inducer sulforaphane (SF). Similarly, UV light-induced pigmentation of WT mouse ear skin could be treated or prevented with SF treatment. Conversely, SF treatment was unable to reduce UV-induced ear skin pigmentation in mice deficient in NRF2 or in mice with keratinocyte-specific conditional deletion of IL-6Rα. Taken together, NRF2 and IL-6Rα signaling are involved in the pathogenesis of UV-induced skin pigmentation, and specific enhancement of NRF2 signaling could represent a potential therapeutic target.
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22
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Rosario DKA, Mutz YS, Castro VS, Bernardes PC, Rajkovic A, Conte-Junior CA. Optimization of UV-C light and lactic acid combined treatment in decontamination of sliced Brazilian dry-cured loin: Salmonella Typhimurium inactivation and physicochemical quality. Meat Sci 2020; 172:108308. [PMID: 32966953 DOI: 10.1016/j.meatsci.2020.108308] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 08/07/2020] [Accepted: 09/08/2020] [Indexed: 11/18/2022]
Abstract
This study aimed to test the effect of UV-C light (0.01-0.64 J/cm2) (UV) and lactic acid (0.1-12.9%) (LA) combined treatment on sliced Brazilian dry-cured loin (Socol, BDL) for (i) Salmonella Typhimurium reduction, (ii) physicochemical changes (color (a*, cured color, and ΔE), protein and lipid oxidation) and (iii) optimization using response surface methodology (RSM). Linear inactivation rate was achieved and UV was 2-fold more efficient than LA to inactivate S. Typhimurium. At the same time these combined technologies increased lipid (linear rate, R2adj = 0.88), protein oxidation (quadratic rate, R2adj = 0.86) and meat discoloration. Furthermore, the minimum point of the physicochemical changes was obtained using RSM, and the decontamination process was optimized. Hence, a reduction of 1.3 log cfu/g was achieved using 0.36 J/cm2 of UV and 7.7% of LA. These combined methods represent a promising industrial intervention strategy to dry-meat safety and quality.
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Affiliation(s)
- Denes K A Rosario
- Center for Food Analysis (NAL), Technological Development Support Laboratory (LADETEC), Avenida Horácio Macedo, 1281, Polo de Química, bloco C, 21941-598, Ilha do Fundão, Cidade Universitária, Rio de Janeiro, RJ, Brazil; Food Science Program, Institute of Chemistry, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149, Cidade Universitária, 21941-909, Rio de Janeiro, RJ, Brazil.
| | - Yhan S Mutz
- Center for Food Analysis (NAL), Technological Development Support Laboratory (LADETEC), Avenida Horácio Macedo, 1281, Polo de Química, bloco C, 21941-598, Ilha do Fundão, Cidade Universitária, Rio de Janeiro, RJ, Brazil; Food Science Program, Institute of Chemistry, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149, Cidade Universitária, 21941-909, Rio de Janeiro, RJ, Brazil.
| | - Vinicius S Castro
- Center for Food Analysis (NAL), Technological Development Support Laboratory (LADETEC), Avenida Horácio Macedo, 1281, Polo de Química, bloco C, 21941-598, Ilha do Fundão, Cidade Universitária, Rio de Janeiro, RJ, Brazil; Food Science Program, Institute of Chemistry, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149, Cidade Universitária, 21941-909, Rio de Janeiro, RJ, Brazil
| | - Patricia C Bernardes
- Department of Food Engineering, Federal University of Espírito Santo, Alegre, Brazil.
| | - Andreja Rajkovic
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent 9000, Belgium
| | - Carlos A Conte-Junior
- Center for Food Analysis (NAL), Technological Development Support Laboratory (LADETEC), Avenida Horácio Macedo, 1281, Polo de Química, bloco C, 21941-598, Ilha do Fundão, Cidade Universitária, Rio de Janeiro, RJ, Brazil; Food Science Program, Institute of Chemistry, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149, Cidade Universitária, 21941-909, Rio de Janeiro, RJ, Brazil; National Institute of Health Quality Control, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil.
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23
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Bruckbauer ST, Minkoff BB, Yu D, Cryns VL, Cox MM, Sussman MR. Ionizing Radiation-induced Proteomic Oxidation in Escherichia coli. Mol Cell Proteomics 2020; 19:1375-1395. [PMID: 32536603 PMCID: PMC8015010 DOI: 10.1074/mcp.ra120.002092] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 06/10/2020] [Indexed: 12/12/2022] Open
Abstract
Recent work has begun to investigate the role of protein damage in cell death because of ionizing radiation (IR) exposure, but none have been performed on a proteome-wide basis, nor have they utilized MS (MS) to determine chemical identity of the amino acid side chain alteration. Here, we use Escherichia coli to perform the first MS analysis of IR-treated intact cells on a proteome scale. From quintuplicate IR-treated (1000 Gy) and untreated replicates, we successfully quantified 13,262 peptides mapping to 1938 unique proteins. Statistically significant, but low in magnitude (<2-fold), IR-induced changes in peptide abundance were observed in 12% of all peptides detected, although oxidative alterations were rare. Hydroxylation (+15.99 Da) was the most prevalent covalent adduct detected. In parallel with these studies on E. coli, identical experiments with the IR-resistant bacterium, Deinococcus radiodurans, revealed orders of magnitude less effect of IR on the proteome. In E. coli, the most significant target of IR by a wide margin was glyceraldehyde 3'-phosphate dehydrogenase (GAPDH), in which the thiol side chain of the catalytic Cys residue was oxidized to sulfonic acid. The same modification was detected in IR-treated human breast carcinoma cells. Sensitivity of GAPDH to reactive oxygen species (ROS) has been described previously in microbes and here, we present GAPDH as an immediate, primary target of IR-induced oxidation across all domains of life.
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Affiliation(s)
- Steven T Bruckbauer
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Benjamin B Minkoff
- Center for Genomic Science Innovation, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Deyang Yu
- Department of Medicine, University of Wisconsin Carbone Cancer Center, School of Medicine and Public Health, University of Wisconsin-Madison, Wisconsin, USA
| | - Vincent L Cryns
- Department of Medicine, University of Wisconsin Carbone Cancer Center, School of Medicine and Public Health, University of Wisconsin-Madison, Wisconsin, USA
| | - Michael M Cox
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, USA.
| | - Michael R Sussman
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, USA; Center for Genomic Science Innovation, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
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24
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Treves H, Siemiatkowska B, Luzarowska U, Murik O, Fernandez-Pozo N, Moraes TA, Erban A, Armbruster U, Brotman Y, Kopka J, Rensing SA, Szymanski J, Stitt M. Multi-omics reveals mechanisms of total resistance to extreme illumination of a desert alga. Nat Plants 2020; 6:1031-1043. [PMID: 32719473 DOI: 10.1038/s41477-020-0729-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 06/24/2020] [Indexed: 05/25/2023]
Abstract
The unparalleled performance of Chlorella ohadii under irradiances of twice full sunlight underlines the gaps in our understanding of how the photosynthetic machinery operates, and what sets its upper functional limit. Rather than succumbing to photodamage under extreme irradiance, unique features of photosystem II function allow C. ohadii to maintain high rates of photosynthesis and growth, accompanied by major changes in composition and cellular structure. This remarkable resilience allowed us to investigate the systems response of photosynthesis and growth to extreme illumination in a metabolically active cell. Using redox proteomics, transcriptomics, metabolomics and lipidomics, we explored the cellular mechanisms that promote dissipation of excess redox energy, protein S-glutathionylation, inorganic carbon concentration, lipid and starch accumulation, and thylakoid stacking. C. ohadii possesses a readily available capacity to utilize a sudden excess of reducing power and carbon for growth and reserve formation, and post-translational redox regulation plays a pivotal role in this rapid response. Frequently the response in C. ohadii deviated from that of model species, reflecting its life history in desert sand crusts. Comparative global and case-specific analyses provided insights into the potential evolutionary role of effective reductant utilization in this extreme resistance of C. ohadii to extreme irradiation.
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Affiliation(s)
- Haim Treves
- Max Planck Institute for Molecular Plant Physiology, Potsdam, Germany.
| | | | | | - Omer Murik
- Department of Plant & Environmental Sciences, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Noe Fernandez-Pozo
- Plant Cell Biology, Department of Biology, University of Marburg, Marburg, Germany
| | | | - Alexander Erban
- Max Planck Institute for Molecular Plant Physiology, Potsdam, Germany
| | - Ute Armbruster
- Max Planck Institute for Molecular Plant Physiology, Potsdam, Germany
| | - Yariv Brotman
- Max Planck Institute for Molecular Plant Physiology, Potsdam, Germany
| | - Joachim Kopka
- Max Planck Institute for Molecular Plant Physiology, Potsdam, Germany
| | - Stefan Andreas Rensing
- Plant Cell Biology, Department of Biology, University of Marburg, Marburg, Germany
- BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Jedrzej Szymanski
- Department of Network Analysis and Modelling, IPK, Gatersleben, Germany
| | - Mark Stitt
- Max Planck Institute for Molecular Plant Physiology, Potsdam, Germany
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25
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Wei H, Loeb SK, Halas NJ, Kim JH. Plasmon-enabled degradation of organic micropollutants in water by visible-light illumination of Janus gold nanorods. Proc Natl Acad Sci U S A 2020; 117:15473-15481. [PMID: 32571948 PMCID: PMC7354998 DOI: 10.1073/pnas.2003362117] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The development of sustainable methods for the degradation of pollutants in water is an ongoing critical challenge. Anthropogenic organic micropollutants such as pharmaceuticals, present in our water supplies in trace quantities, are currently not remediated by conventional treatment processes. Here, we report an initial demonstration of the oxidative degradation of organic micropollutants using specially designed nanoparticles and visible-wavelength sunlight. Gold "Janus" nanorods (Au JNRs), partially coated with silica to enhance their colloidal stability in aqueous solutions while also maintaining a partially uncoated Au surface to facilitate photocatalysis, were synthesized. Au JNRs were dispersed in an aqueous solution containing peroxydisulfate (PDS), where oxidative degradation of both simulant and actual organic micropollutants was observed. Photothermal heating, light-induced hot electron-driven charge transfer, and direct electron shuttling under dark conditions all contribute to the observed oxidation chemistry. This work not only provides an ideal platform for studying plasmonic photochemistry in aqueous medium but also opens the door for nanoengineered, solar-based methods to remediate recalcitrant micropollutants in water supplies.
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Affiliation(s)
- Haoran Wei
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Rice University, Houston, TX 77005
| | - Stephanie K Loeb
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Rice University, Houston, TX 77005
| | - Naomi J Halas
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Rice University, Houston, TX 77005;
- Department of Chemistry, Rice University, Houston, TX 77005
| | - Jae-Hong Kim
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511;
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Rice University, Houston, TX 77005
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26
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Lunova M, Smolková B, Uzhytchak M, Janoušková KŽ, Jirsa M, Egorova D, Kulikov A, Kubinová Š, Dejneka A, Lunov O. Light-induced modulation of the mitochondrial respiratory chain activity: possibilities and limitations. Cell Mol Life Sci 2020; 77:2815-2838. [PMID: 31583425 PMCID: PMC11104903 DOI: 10.1007/s00018-019-03321-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 09/11/2019] [Accepted: 09/23/2019] [Indexed: 12/17/2022]
Abstract
Biological effects of high fluence low-power (HFLP) lasers have been reported for some time, yet the molecular mechanisms procuring cellular responses remain obscure. A better understanding of the effects of HFLP lasers on living cells will be instrumental for the development of new experimental and therapeutic strategies. Therefore, we investigated sub-cellular mechanisms involved in the laser interaction with human hepatic cell lines. We show that mitochondria serve as sub-cellular "sensor" and "effector" of laser light non-specific interactions with cells. We demonstrated that despite blue and red laser irradiation results in similar apoptotic death, cellular signaling and kinetic of biochemical responses are distinct. Based on our data, we concluded that blue laser irradiation inhibited cytochrome c oxidase activity in electron transport chain of mitochondria. Contrary, red laser triggered cytochrome c oxidase excessive activation. Moreover, we showed that Bcl-2 protein inhibited laser-induced toxicity by stabilizing mitochondria membrane potential. Thus, cells that either overexpress or have elevated levels of Bcl-2 are protected from laser-induced cytotoxicity. Our findings reveal the mechanism how HFLP laser irradiation interfere with cell homeostasis and underscore that such laser irradiation permits remote control of mitochondrial function in the absence of chemical or biological agents.
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Affiliation(s)
- Mariia Lunova
- Institute of Physics, Czech Academy of Sciences, 18221, Prague, Czech Republic
- Institute for Clinical and Experimental Medicine (IKEM), 14021, Prague, Czech Republic
| | - Barbora Smolková
- Institute of Physics, Czech Academy of Sciences, 18221, Prague, Czech Republic
| | - Mariia Uzhytchak
- Institute of Physics, Czech Academy of Sciences, 18221, Prague, Czech Republic
| | - Klára Žofie Janoušková
- Institute for Clinical and Experimental Medicine (IKEM), 14021, Prague, Czech Republic
- First Faculty of Medicine, Charles University, 12108, Prague, Czech Republic
| | - Milan Jirsa
- Institute for Clinical and Experimental Medicine (IKEM), 14021, Prague, Czech Republic
| | | | | | - Šárka Kubinová
- Institute of Physics, Czech Academy of Sciences, 18221, Prague, Czech Republic
- Institute of Experimental Medicine, Czech Academy of Sciences, 14220, Prague, Czech Republic
| | - Alexandr Dejneka
- Institute of Physics, Czech Academy of Sciences, 18221, Prague, Czech Republic
| | - Oleg Lunov
- Institute of Physics, Czech Academy of Sciences, 18221, Prague, Czech Republic.
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27
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Rosen E, Kryndushkin D, Aryal B, Gonzalez Y, Chehab L, Dickey J, Rao VA. Acute total body ionizing gamma radiation induces long-term adverse effects and immediate changes in cardiac protein oxidative carbonylation in the rat. PLoS One 2020; 15:e0233967. [PMID: 32497067 PMCID: PMC7272027 DOI: 10.1371/journal.pone.0233967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 05/15/2020] [Indexed: 12/12/2022] Open
Abstract
Radiation-induced heart disease presents a significant challenge in the event of an accidental radiation exposure as well as to cancer patients who receive acute doses of irradiation as part of radiation therapy. We utilized the spontaneously hypertensive Wistar-Kyoto rat model, previously shown to demonstrate drug-induced cardiomyopathy, to evaluate the acute and long-term effects of sub-lethal total body gamma irradiation at two, four, and fifty-two weeks. We further examined irreversible oxidative protein carbonylation in the heart immediately following irradiation in the normotensive Wistar-Kyoto rat. Both males and females sustained weight loss and anemic conditions compared to untreated controls over a one-year period as reflected by reduced body weight and low red blood cell count. Increased inflammation was detected by elevated IL-6 serum levels selectively in males at four weeks. Serum cardiac troponin T and I analyses revealed signs of cardiomyopathy at earlier timepoints, but high variability was observed, especially at one year. Echocardiography at two weeks following 5.0Gy treatment revealed a significant decrease in cardiac output in females and a significant decrease in both diastolic and systolic volumes in males. Following 10.0Gy irradiation in the normotensive Wistar-Kyoto rat, the heart tissue showed an increase in total protein oxidative carbonylation accompanied by DNA damage indicated by an increase in γ-H2AX. Using proteomic analyses, we identified several novel proteins which showed a marked difference in carbonylation including those of mitochondrial origin and most notably, cardiac troponin T, one of the key proteins involved in cardiomyocyte contractility. Overall, we present findings of acute oxidative protein damage, DNA damage, cardiac troponin T carbonylation, and long-term cardiomyopathy in the irradiated animals.
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Affiliation(s)
- Elliot Rosen
- Center for Drug Evaluation and Research, Office of Biotechnology Products, United States Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Dmitry Kryndushkin
- Center for Drug Evaluation and Research, Office of Biotechnology Products, United States Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Baikuntha Aryal
- Center for Drug Evaluation and Research, Office of Biotechnology Products, United States Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Yanira Gonzalez
- Center for Drug Evaluation and Research, Office of Biotechnology Products, United States Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Leena Chehab
- Center for Drug Evaluation and Research, Office of Biotechnology Products, United States Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Jennifer Dickey
- Center for Drug Evaluation and Research, Office of Biotechnology Products, United States Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - V. Ashutosh Rao
- Center for Drug Evaluation and Research, Office of Biotechnology Products, United States Food and Drug Administration, Silver Spring, Maryland, United States of America
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Heo Y, Kim K, Kim J, Jang J, Park CB. Near-Infrared-Active Copper Bismuth Oxide Electrodes for Targeted Dissociation of Alzheimer's β-Amyloid Aggregates. ACS Appl Mater Interfaces 2020; 12:23667-23676. [PMID: 32364368 DOI: 10.1021/acsami.0c02349] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The abnormal accumulation of β-amyloid (Aβ) aggregates in the brain is a major pathological hallmark of Alzheimer's disease. We report a near-infrared (NIR)-active CuBi2O4-based photocathodic platform that can target intact Aβ aggregates and dissociate them into nontoxic species. Because of its relatively narrow band gap, CuBi2O4 exhibits strong absorption of NIR light, which allows for deeper tissue penetration and causes less photodamage to tissues compared to visible light. Furthermore, its high stability in aqueous media, biocompatibility, and robustness against photocorrosion make CuBi2O4 an ideal material for medical applications. For the targeted clearance of Aβ aggregates, we have conjugated the KLVFF peptide which specifically recognizes and captures Aβ aggregates on the surface of silver-doped CuBi2O4 (Ag:CuBi2O4). Upon illumination of NIR light under a cathodic bias, the KLVFF-immobilized Ag:CuBi2O4 (KLVFF-Ag:CuBi2O4) effectively dissociated β-sheet-rich, long, and entangled Aβ fibrillary aggregates into small fragmented, soluble species through photo-oxygenation. We also verified that the KLVFF-Ag:CuBi2O4 photocathode is biocompatible and effective in reducing Aβ aggregate-induced neurotoxicity. Our work demonstrates the potential of the KLVFF-Ag:CuBi2O4 platform for the targeted disassembly of cytotoxic, robust Aβ aggregates with the aid of NIR energy and cathodic bias.
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Affiliation(s)
- Yerin Heo
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
| | - Kayoung Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
| | - Jinhyun Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
| | - Jinhyeong Jang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
| | - Chan Beum Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
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Jin P, Niu X, Zhang F, Dong K, Dai H, Zhang H, Wang W, Chen H, Chen X. Stable and Reusable Light-Responsive Reduced Covalent Organic Framework (COF-300-AR) as a Oxidase-Mimicking Catalyst for GSH Detection in Cell Lysate. ACS Appl Mater Interfaces 2020; 12:20414-20422. [PMID: 32283916 DOI: 10.1021/acsami.0c01763] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Covalent organic frameworks (COFs), as one of the most significant members of the porous organic frameworks, have been well used in the photocatalysis owing to their outspread π-conjugated framework, high crystallinity and regular pore structure. Herein, after reducing the labile imine-linked COF-300 to the more stable amine-linked COF-300-AR, we for the first time demonstrated that COF-300-AR was the light-responsive oxidase mimic. COF-300-AR exhibited excellent oxidase-mimicking activity under purple light stimulation (λ = 400 nm), which can catalyze the oxidation of classical substrates such as 3,3',5,5'-tetramethylbenzydine (TMB) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) by the formation of •OH and O2•- free radicals in the presence of dissolved oxygen. The COF-300-AR oxidase mimic has outstanding advantages of easy light control, high stability, good reusability, and highly catalytic oxidation capacity and has been applied to detect glutathione (GSH) levels in HL60 cells with good selectivity and high sensitivity. This study will broaden the sensing applications of COFs and offer a promising build block for the construction of artificial enzymes.
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Affiliation(s)
- Peng Jin
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaoying Niu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fang Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Kui Dong
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Hongxia Dai
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Huige Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Weifeng Wang
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Hongli Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xingguo Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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Orooji Y, Ghanbari M, Amiri O, Salavati-Niasari M. Facile fabrication of silver iodide/graphitic carbon nitride nanocomposites by notable photo-catalytic performance through sunlight and antimicrobial activity. J Hazard Mater 2020; 389:122079. [PMID: 32062394 DOI: 10.1016/j.jhazmat.2020.122079] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 01/08/2020] [Accepted: 01/11/2020] [Indexed: 05/24/2023]
Abstract
Silver iodide/graphitic carbon nitride nanocomposites have been successfully fabricated through sonication-assisted deposition-precipitation route at room temperature and hydrothermal method. Varied mass ratios and preparation processes can modify the structure, purity, shape, and scale of specimens. The purity of the product was confirmed by Energy Dispersive X-Ray Spectroscopy (EDS) and X-ray crystallography. The morphology and size of specimens could be observed with transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM). The bandgap was evaluated around 2.82 eV for pure g-C3N4. The bandgap has reduced to 2.70 eV by increasing the quantity of silver iodide in the nanocomposites. The photocatalytic activity of AgI/C3N4 has been studied over the destruction of rhodamine B (RhB) and methyl orange (MO) through visible radiation due to their suitable bandgap. The as-prepared AgI/C3N4 nanocomposites photocatalyst revealed better photocatalytic behavior than the genuine AgI and C3N4 which ascribed to synergic impacts at the interconnection of C3N4 and AgI. Furthermore, these nanocomposites have great potential for being a great antibacterial agent.
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Affiliation(s)
- Yasin Orooji
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China; College of Materials Science and Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, PR China.
| | - Mojgan Ghanbari
- Institute of Nano Science and Nano Technology, University of Kashan, Kashan, Islamic Republic of Iran
| | - Omid Amiri
- Department of Chemistry, College of Science, University of Raparin, Rania, Kurdistan Region, Iraq
| | - Masoud Salavati-Niasari
- Institute of Nano Science and Nano Technology, University of Kashan, Kashan, Islamic Republic of Iran.
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Shaler T, Lin H, Bakke J, Chen S, Grover A, Chang P. Particle radiation-induced dysregulation of protein homeostasis in primary human and mouse neuronal cells. Life Sci Space Res (Amst) 2020; 25:9-17. [PMID: 32414496 DOI: 10.1016/j.lssr.2020.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 02/12/2020] [Accepted: 02/16/2020] [Indexed: 06/11/2023]
Abstract
Space particle radiations may cause significant damage to proteins and oxidative stress in the cells within the central nervous system and pose a potential health hazard to humans in long-term manned space explorations. Dysregulation of the ubiquitin-proteasome system as evidenced by abnormal accumulation of polyubiquitin (pUb) chain linkages has been implicated in several age-related neurodegenerative disorders by mechanisms that may involve the inter-neuronal spread of toxic misfolded proteins, the induction of chronic neuroinflammation, or the inappropriate inhibition or activation of key enzymes, which could lead to dysfunction in, for example, proteolysis, or the accumulation of post-translationally-modified substrates.In this study, we employed a quantitative proteomics method to evaluate the impact of particle-radiation induced alterations in three major pUb-linked chains at lysine residues Lys-48 (K-48), Lys-63 (K-63), and Lys-11 (K-11), and probed for global proteomic changes in mouse and human neural cells that were irradiated with low doses of 250 MeV proton, 260 MeV/u silicon or 1 GeV/u iron ions. We found significant accumulation in K-48 linkage after 1 Gy protons and K-63 linkage after 0.5 Gy iron ions in human neural cells. Cells derived from different regions of the mouse brain (cortex, striatum and mesencephalon) showed differential sensitivity to particle radiation exposure. Although none of the linkages were altered after proton exposure, both K-48 and K-63 linkages in mouse striatal neuronal cells were elevated after 0.5 Gy of silicon or iron ions. Changes were also seen in proteins commonly used as markers of neural progenitor and stem cells, in DNA binding/damage repair and cellular redox pathways. In contrast, no significant changes were observed at the same time point after proton irradiation. These results suggest that the quality of the particle radiation plays a key role in the level, linkage and cell type specificity of protein homeostasis in key populations of neuronal cells.
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Affiliation(s)
- Tom Shaler
- SRI International, 333 Ravenswood Ave, Menlo Park, CA 94025 United States
| | - Hua Lin
- SRI International, 333 Ravenswood Ave, Menlo Park, CA 94025 United States
| | - James Bakke
- SRI International, 333 Ravenswood Ave, Menlo Park, CA 94025 United States
| | - Sophia Chen
- SRI International, 333 Ravenswood Ave, Menlo Park, CA 94025 United States
| | - Amber Grover
- SRI International, 333 Ravenswood Ave, Menlo Park, CA 94025 United States
| | - Polly Chang
- SRI International, 333 Ravenswood Ave, Menlo Park, CA 94025 United States.
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Cap M, Cingolani C, Lires C, Mozgovoj M, Soteras T, Sucari A, Gentiluomo J, Descalzo A, Grigioni G, Signorini M, Horak C, Vaudagna S, Leotta G. Combination of organic acids and low-dose gamma irradiation as antimicrobial treatment to inactivate Shiga toxin-producing Escherichia coli inoculated in beef trimmings: Lack of benefits in relation to single treatments. PLoS One 2020; 15:e0230812. [PMID: 32214399 PMCID: PMC7098641 DOI: 10.1371/journal.pone.0230812] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 03/09/2020] [Indexed: 12/04/2022] Open
Abstract
The aim of this study was to assess the efficacy of lactic acid (LA), caprylic acid (CA), high- (HDI) and low- (LDI) dose gamma irradiation and LDI combined with LA or CA on the inactivation of a pool of Shiga toxin-producing Escherichia coli (STEC) strains inoculated on beef trimmings. The three most efficacious treatments were selected to study their effect on meat quality parameters and sensory attributes. The inoculum included five native STEC serogroups (O26, O103, O111, O145 and O157). The treatments applied were 0.5% LA, 0.04% CA, 0.5 kGy LDI, 2 kGy HDI, LDI+LA and LDI+CA. Beef trimmings were divided into two groups; one was inoculated with high (7 log CFU/g) and the other with low (1 log CFU/g) level of inoculum. Efficacy was assessed by estimating log reduction and reduction of stx- and eae-positive samples after enrichment, respectively. Results showed that treatments with organic acids alone were not effective in reducing STEC populations. For high inoculum samples, the most effective treatment was HDI followed by LDI+LA and LDI alone or combined with CA. For low inoculum samples, the most effective treatment was HDI followed by LDI alone or combined with organic acids. Concerning meat quality parameters and sensory attributes, irradiation treatments (LDI and HDI) caused minimal changes, while LDI+LA modified them significantly compared with the control. Therefore, based on our results, no benefits were observed after combining organic acids with gamma irradiation.
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Affiliation(s)
- Mariana Cap
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto Tecnología de Alimentos; Buenos Aires, Argentina
- * E-mail:
| | - Celeste Cingolani
- Centro Atómico Ezeiza, Comisión Nacional de Energía Atómica (CNEA), Buenos Aires, Argentina
| | - Carla Lires
- Centro Atómico Ezeiza, Comisión Nacional de Energía Atómica (CNEA), Buenos Aires, Argentina
| | - Marina Mozgovoj
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto Tecnología de Alimentos; Buenos Aires, Argentina
| | - Trinidad Soteras
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto Tecnología de Alimentos; Buenos Aires, Argentina
| | - Adriana Sucari
- División Higiene y Seguridad Alimentaria y Ambiental, Laboratorio de Alimentos Stamboulian, Buenos Aires, Argentina
| | - Jimena Gentiluomo
- División Higiene y Seguridad Alimentaria y Ambiental, Laboratorio de Alimentos Stamboulian, Buenos Aires, Argentina
| | - Adriana Descalzo
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto Tecnología de Alimentos; Buenos Aires, Argentina
| | - Gabriela Grigioni
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto Tecnología de Alimentos; Buenos Aires, Argentina
| | - Marcelo Signorini
- Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria Rafaela, Buenos Aires, Argentina
| | - Celina Horak
- Centro Atómico Ezeiza, Comisión Nacional de Energía Atómica (CNEA), Buenos Aires, Argentina
| | - Sergio Vaudagna
- Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto Tecnología de Alimentos; Buenos Aires, Argentina
| | - Gerardo Leotta
- Facultad de Ciencias Veterinarias UNLP, IGEVET—Instituto de Genética Veterinaria “Ing. Fernando N. Dulout” (UNLP-CONICET LA PLATA), La Plata, Argentina
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Zhu S, Wang X, Li S, Liu L, Li L. Near-Infrared-Light-Assisted in Situ Reduction of Antimicrobial Peptide-Protected Gold Nanoclusters for Stepwise Killing of Bacteria and Cancer Cells. ACS Appl Mater Interfaces 2020; 12:11063-11071. [PMID: 32027113 DOI: 10.1021/acsami.0c00310] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Biomolecule-protected gold nanostructures show good performance in biomedical applications. However, precise control over gold nanocluster (AuNC) preparation with biomolecules remains challenging. Here, we develop a simple near-infrared (NIR)-light-assisted method for in situ reduction of antimicrobial peptide (AMP)-protected AuNCs. Take advantage of the high photothermal conversion efficiency of the conjugated polymer (CP) upon NIR light irradiation, we promote the rapid reduction of AuNCs by the AMP on the surface of the CP. The fluorescent properties of the AuNCs were improved owing to the formation of a unique Au(0)NC@Au(I)AMP core-shell nanostructure. This nanostructure is attributed to the rapid reduction of Au(0) and collision and fusion of Au(0) at high temperatures. Integrating antibacterial AMPs, fluorescent AuNCs, and photothermal CPs, the composites facilitated different killing mechanisms for both bacteria and cancer cells. This material system provides an all-in-one strategy for the stepwise killing of cancer cells and bacterial infection.
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Affiliation(s)
- Shuxian Zhu
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Xiaoyu Wang
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Shengliang Li
- Center of Super-Diamond and Advanced Films, Department of Chemistry, City University of Hong Kong, Hong Kong 999077, P. R. China
| | - Lu Liu
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Lidong Li
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
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Ping Z, Peng Y, Lang H, Xinyong C, Zhiyi Z, Xiaocheng W, Hong Z, Liang S. Oxidative Stress in Radiation-Induced Cardiotoxicity. Oxid Med Cell Longev 2020; 2020:3579143. [PMID: 32190171 PMCID: PMC7071808 DOI: 10.1155/2020/3579143] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 01/03/2020] [Accepted: 02/13/2020] [Indexed: 02/07/2023]
Abstract
There is a distinct increase in the risk of heart disease in people exposed to ionizing radiation (IR). Radiation-induced heart disease (RIHD) is one of the adverse side effects when people are exposed to ionizing radiation. IR may come from various forms, such as diagnostic imaging, radiotherapy for cancer treatment, nuclear disasters, and accidents. However, RIHD was mainly observed after radiotherapy for chest malignant tumors, especially left breast cancer. Radiation therapy (RT) has become one of the main ways to treat all kinds of cancer, which is used to reduce the recurrence of cancer and improve the survival rate of patients. The potential cause of radiation-induced cardiotoxicity is unclear, but it may be relevant to oxidative stress. Oxidative stress, an accumulation of reactive oxygen species (ROS), disrupts intracellular homeostasis through chemical modification and damages proteins, lipids, and DNA; therefore, it results in a series of related pathophysiological changes. The purpose of this review was to summarise the studies of oxidative stress in radiotherapy-induced cardiotoxicity and provide prevention and treatment methods to reduce cardiac damage.
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Affiliation(s)
- Zhang Ping
- Department of Neurology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006 Jiangxi, China
| | - Yang Peng
- Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006 Jiangxi, China
| | - Hong Lang
- Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006 Jiangxi, China
| | - Cai Xinyong
- Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006 Jiangxi, China
| | - Zeng Zhiyi
- Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006 Jiangxi, China
| | - Wu Xiaocheng
- Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006 Jiangxi, China
| | - Zeng Hong
- Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006 Jiangxi, China
| | - Shao Liang
- Department of Cardiology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006 Jiangxi, China
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Amorim NML, Kee A, Coster ACF, Lucas C, Bould S, Daniel S, Weir JM, Mellett NA, Barbour J, Meikle PJ, Cohn RJ, Turner N, Hardeman EC, Simar D. Irradiation impairs mitochondrial function and skeletal muscle oxidative capacity: significance for metabolic complications in cancer survivors. Metabolism 2020; 103:154025. [PMID: 31765667 DOI: 10.1016/j.metabol.2019.154025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/19/2019] [Accepted: 11/21/2019] [Indexed: 11/16/2022]
Abstract
BACKGROUND Metabolic complications are highly prevalent in cancer survivors treated with irradiation but the underlying mechanisms remain unknown. METHODS Chow or high fat-fed C57Bl/6J mice were irradiated (6Gy) before investigating the impact on whole-body or skeletal muscle metabolism and profiling their lipidomic signature. Using a transgenic mouse model (Tg:Pax7-nGFP), we isolated muscle progenitor cells (satellite cells) and characterised their metabolic functions. We recruited childhood cancer survivors, grouped them based on the use of total body irradiation during their treatment and established their lipidomic profile. RESULTS In mice, irradiation delayed body weight gain and impaired fat pads and muscle weights. These changes were associated with impaired whole-body fat oxidation in chow-fed mice and altered ex vivo skeletal muscle fatty acid oxidation, potentially due to a reduction in oxidative fibres and reduced mitochondrial enzyme activity. Irradiation led to fasting hyperglycaemia and impaired glucose uptake in isolated skeletal muscles. Cultured satellite cells from irradiated mice showed decreased fatty acid oxidation and reduced glucose uptake, recapitulating the host metabolic phenotype. Irradiation resulted in a remodelling of lipid species in skeletal muscles, with the extensor digitorum longus muscle being particularly affected. A large number of lipid species were reduced, with several of these species showing a positive correlation with mitochondrial enzymes activity. In cancer survivors exposed to irradiation, we found a similar decrease in systemic levels of most lipid species, and lipid species that increased were positively correlated with insulin resistance (HOMA-IR). CONCLUSION Irradiation leads to long-term alterations in body composition, and lipid and carbohydrate metabolism in skeletal muscle, and affects muscle progenitor cells. Such changes result in persistent impairment of metabolic functions, providing a new mechanism for the increased prevalence of metabolic diseases reported in irradiated individuals. In this context, changes in the lipidomic signature in response to irradiation could be of diagnostic value.
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Affiliation(s)
- Nadia M L Amorim
- Cellular and Genetic Medicine Unit, School of Medical Sciences, UNSW Sydney, Sydney, Australia
| | - Anthony Kee
- Cellular and Genetic Medicine Unit, School of Medical Sciences, UNSW Sydney, Sydney, Australia
| | - Adelle C F Coster
- School of Mathematics and Statistics, UNSW Sydney, Sydney, Australia
| | - Christine Lucas
- Cellular and Genetic Medicine Unit, School of Medical Sciences, UNSW Sydney, Sydney, Australia
| | - Sarah Bould
- Cellular and Genetic Medicine Unit, School of Medical Sciences, UNSW Sydney, Sydney, Australia
| | - Sara Daniel
- Mechanisms of Disease and Translational Research, School of Medical Sciences, UNSW Sydney, Sydney, Australia
| | - Jacquelyn M Weir
- Metabolomics Laboratory, Baker IDI, Heart and Diabetes Institute, Melbourne, Australia
| | - Natalie A Mellett
- Metabolomics Laboratory, Baker IDI, Heart and Diabetes Institute, Melbourne, Australia
| | - Jayne Barbour
- Mitochondrial Bioenergetics Lab, Department of Pharmacology, School of Medical Sciences, UNSW Sydney, Sydney, Australia
| | - Peter J Meikle
- Metabolomics Laboratory, Baker IDI, Heart and Diabetes Institute, Melbourne, Australia
| | - Richard J Cohn
- School of Women's and Children's Health, UNSW Sydney, Randwick, Australia; Kids Cancer Centre, Sydney Children's Hospital Network, Randwick, Australia
| | - Nigel Turner
- Mitochondrial Bioenergetics Lab, Department of Pharmacology, School of Medical Sciences, UNSW Sydney, Sydney, Australia
| | - Edna C Hardeman
- Cellular and Genetic Medicine Unit, School of Medical Sciences, UNSW Sydney, Sydney, Australia.
| | - David Simar
- Mechanisms of Disease and Translational Research, School of Medical Sciences, UNSW Sydney, Sydney, Australia.
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Zheng D, Zhang Y, Liu X, Wang J. Coupling natural systems with synthetic chemistry for light-driven enzymatic biocatalysis. Photosynth Res 2020; 143:221-231. [PMID: 31317382 DOI: 10.1007/s11120-019-00660-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 07/06/2019] [Indexed: 06/10/2023]
Abstract
Visible light-driven redox reactions have been widely adopted for the production of chemicals to combat energy shortage and global warming. Key elements of such a reaction system include a photosensitizer, a catalyst, and an electron source. In this review, we introduce the small molecules and nanoparticles that are widely used as photosensitizers, as well as the development of a photosensitizer protein that is based on the expansion of genetic code, with a fluorescent protein that is used as a scaffold. Visible light-driven enzymes using proteins as photosensitizers or as catalysts such as carbon monoxide dehydrogenase (CODH), formic acid dehydrogenase (FDH), hydrogenase, nitrogenase, cytochrome P450 BM3, and alkane synthase are then described. CODH can be coupled with photosensitizing nanoparticles to reduce CO2 to CO, and hydrogenase can produce H2 using high-energy electrons produced from dye-sensitized nanoparticles. When water-soluble zinc porphyrin is coupled with FDH, visible light drives CO2 to produce formic acid. Nitrogenase can reduce N2 to NH3 using CdS nanoparticle as photosensitizer. Cytochrome P450 BM3 can be enhanced by a visible light-driven redox system and thus by hydroxylate lauric acid or fatty acids. CvFAP, an alkane synthase, can decarboxylate palmitic acid to pentadecane under blue light excitation. Moreover, we describe a genetically encoded photosensitive protein, which mimics the function of natural photosynthesis and catalyzes the conversion of CO2 to CO when covalently attached with a Ni-terpyridine complex.
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Affiliation(s)
- Dandan Zheng
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Ying Zhang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Xiaohong Liu
- Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jiangyun Wang
- Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Graf A, Finkel J, Chauvet AAP, Rtimi S. Deciphering the Mechanisms of Bacterial Inactivation on HiPIMS Sputtered Cu xO-FeO x-PET Surfaces: From Light Absorption to Catalytic Bacterial Death. ACS Appl Mater Interfaces 2019; 11:45319-45329. [PMID: 31696713 DOI: 10.1021/acsami.9b17380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The production of nontoxic, affordable, and efficient antibacterial surfaces is key to the well-being of our societies. In this aim, antibacterial thin films have been prepared using earth-abundant metals deposited using high-power impulse magnetron sputtering (HiPIMS). The sputtered FeOx, CuxO, and mixed CuxO-FeOx films exhibited fast bacterial inactivation properties under exposure to indoor light (340-720 nm) showing total bacterial inactivation within 180, 120, and 60 min, respectively. The photocatalytic mechanisms of these films were investigated, from the absorption of photons up to the bacteria's fate, by means of ultrafast transient spectroscopy, flow cytometry, and malondialdehyde (MDA) quantification justifying the cell wall disruption. The primary driving force leading to bacterial inactivation was found to be the oxidative stress at the interface between the sputtered thin films and the microorganism. This was justified by using engineered porinless bacteria disabling the possible ion diffusion leading to internal bacterial inactivation. Such stress is a direct consequence of the photogenerated electron-hole pairs at the interface of the sputtered layers. By diffuse reflectance spectroscopy, we found that both FeOx and CuxO present a band gap of ∼2.9 eV (>425 nm), while the mixed CuxO-FeOx thin film has a band gap below 2.3 eV (>540 nm). The structure and atomic composition of the films were characterized by energy-dispersive X-ray, X-ray photoelectron, and optical spectroscopy. While the composition and metal oxidation states are distinct in all three films, the difference in photocatalytic efficiency can, at first sight, be explained as the direct consequence of their absorbance and the unique interaction between Fe and Cu oxides in the composite film.
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Affiliation(s)
- Arthur Graf
- Department of Chemistry , The University of Sheffield , Dainton Building, C94, S10 2TN Sheffield , U.K
| | - Jake Finkel
- Department of Chemistry , The University of Sheffield , Dainton Building, C94, S10 2TN Sheffield , U.K
| | - Adrien A P Chauvet
- Department of Chemistry , The University of Sheffield , Dainton Building, C94, S10 2TN Sheffield , U.K
| | - Sami Rtimi
- EPFL-STI-IMX-LTP, Station 12 , Ecole Polytechnique Fédérale de Lausanne , 1015 Lausanne , Switzerland
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Skotnicki K, Taras-Goslinska K, Janik I, Bobrowski K. Radiation Induced One-Electron Oxidation of 2-Thiouracil in Aqueous Solutions. Molecules 2019; 24:E4402. [PMID: 31810289 PMCID: PMC6930642 DOI: 10.3390/molecules24234402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 11/27/2019] [Accepted: 11/27/2019] [Indexed: 11/17/2022] Open
Abstract
Oxidative damage to 2-thiouracil (2-TU) by hydroxyl (•OH) and azide (●N3) radicals produces various primary reactive intermediates. Their optical absorption spectra and kinetic characteristics were studied by pulse radiolysis with UV-vis spectrophotometric and conductivity detection and by time-dependent density functional theory (TD-DFT) method. The transient absorption spectra recorded in the reactions of •OH with 2-TU depend on the concentration of 2-TU, however, only slightly on pH. At low concentrations, they are characterized by a broad absorption band with a weakly pronounced maxima located at λ = 325, 340 and 385 nm, whereas for high concentrations, they are dominated by an absorption band with λmax ≈ 425 nm. Based on calculations using TD-DFT method, the transient absorption spectra at low concentration of 2-TU were assigned to the ●OH-adducts to the double bond at C5 and C6 carbon atoms (3●, 4●) and 2c-3e bonded ●OH adduct to sulfur atom (1…●OH) and at high concentration of 2-TU also to the dimeric 2c-3e S-S-bonded radical in neutral form (2●). The dimeric radical (2●) is formed in the reaction of thiyl-type radical (6●) with 2-TU and both radicals are in an equilibrium with Keq = 4.2 × 103 M-1. Similar equilibrium (with Keq = 4.3 × 103 M-1) was found for pH above the pKa of 2-TU which involves admittedly the same radical (6●) but with the dimeric 2c-3e S-S bonded radical in anionic form (2●-). In turn, ●N3-induced oxidation of 2-TU occurs via radical cation with maximum spin location on the sulfur atom which subsequently undergoes deprotonation at N1 atom leading again to thiyl-type radical (6●). This radical is a direct precursor of dimeric radical (2●).
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Affiliation(s)
- Konrad Skotnicki
- Centre of Radiation Research and Technology, Institute of Nuclear Chemistry and Technology, 03-195 Warsaw, Poland;
| | | | - Ireneusz Janik
- Notre Dame Radiation Laboratory, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Krzysztof Bobrowski
- Centre of Radiation Research and Technology, Institute of Nuclear Chemistry and Technology, 03-195 Warsaw, Poland;
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Santaus TM, Greenberg K, Suri P, Geddes CD. Elucidation of a non-thermal mechanism for DNA/RNA fragmentation and protein degradation when using Lyse-It. PLoS One 2019; 14:e0225475. [PMID: 31790434 PMCID: PMC6886747 DOI: 10.1371/journal.pone.0225475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 11/05/2019] [Indexed: 01/11/2023] Open
Abstract
Rapid sample preparation is one of the leading bottlenecks to low-cost and efficient sample component detection. To overcome this setback, a technology known as Lyse-It has been developed to rapidly (less than 60 seconds) lyse Gram-positive and-negative bacteria alike, while simultaneously fragmenting DNA/RNA and proteins into tunable sizes. This technology has been used with a variety of organisms, but the underlying mechanism behind how the technology actually works to fragment DNA/RNA and proteins has hitherto been studied. It is generally understood how temperature affects cellular lysing, but for DNA/RNA and protein degradation, the temperature and amount of energy introduced by microwave irradiation of the sample, cannot explain the degradation of the biomolecules to the extent that was being observed. Thus, an investigation into the microwave generation of reactive oxygen species, in particular singlet oxygen, hydroxyl radicals, and superoxide anion radicals, was undertaken. Herein, we probe one aspect, the generation of reactive oxygen species (ROS), which is thought to contribute to a non-thermal mechanism behind biomolecule fragmentation with the Lyse-It technology. By utilizing off/on (Photoinduced electron transfer) PET fluorescent-based probes highly specific for reactive oxygen species, it was found that as oxygen concentration in the sample and/or microwave irradiation power increases, more reactive oxygen species are generated and ultimately, more oxidation and biomolecule fragmentation occurs within the microwave cavity.
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Affiliation(s)
- Tonya M. Santaus
- Chemistry and Biochemistry Department, University of Maryland, Baltimore County, Baltimore, Maryland, United States of America
- Institute of Fluorescence, University of Maryland, Baltimore County, Baltimore, Maryland, United States of America
| | - Ken Greenberg
- Chemistry and Biochemistry Department, University of Maryland, Baltimore County, Baltimore, Maryland, United States of America
| | - Prabhdeep Suri
- Chemistry and Biochemistry Department, University of Maryland, Baltimore County, Baltimore, Maryland, United States of America
| | - Chris D. Geddes
- Chemistry and Biochemistry Department, University of Maryland, Baltimore County, Baltimore, Maryland, United States of America
- Institute of Fluorescence, University of Maryland, Baltimore County, Baltimore, Maryland, United States of America
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Tanaka K, Ishikawa M, Kaneko M, Kamiya K, Kato S, Nakanishi S. The endogenous redox rhythm is controlled by a central circadian oscillator in cyanobacterium Synechococcus elongatus PCC7942. Photosynth Res 2019; 142:203-210. [PMID: 31485868 DOI: 10.1007/s11120-019-00667-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 08/26/2019] [Indexed: 06/10/2023]
Abstract
The intracellular redox and the circadian clock in photosynthetic organisms are two major regulators globally affecting various biological functions. Both of the global control systems have evolved as systems to adapt to regularly or irregularly changing light environments. Here, we report that the two global regulators mutually interact in cyanobacterium Synechococcus elongatus PCC7942, a model photosynthetic organism whose clock molecular mechanism is well known. Electrochemical assay using a transmembrane electron mediator revealed that intracellular redox of S. elongatus PCC7942 cell exhibited circadian rhythms under constant light conditions. The redox rhythm disappeared when transcription/translation of clock genes is defunctionalized, indicating that the transcription/translation controlled by a core KaiABC oscillator generates the circadian redox rhythm. Importantly, the amplitude of the redox rhythm at a constant light condition was large enough to affect the KaiABC oscillator. The findings indicated that the intracellular redox state is actively controlled to change in a 24-h cycle under constant light conditions by the circadian clock system.
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Affiliation(s)
- Kenya Tanaka
- Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8631, Japan
| | - Masahito Ishikawa
- Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8631, Japan
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Masahiro Kaneko
- Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kazuhide Kamiya
- Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8631, Japan
- Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8631, Japan
| | - Souichiro Kato
- Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8631, Japan
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo, Hokkaido, 062-8517, Japan
| | - Shuji Nakanishi
- Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8631, Japan.
- Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8631, Japan.
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Khaled A, Sleiman M, Darras E, Trivella A, Bertrand C, Inguimbert N, Goupil P, Richard C. Photodegradation of Myrigalone A, an Allelochemical from Myrica gale: Photoproducts and Effect of Terpenes. J Agric Food Chem 2019; 67:7258-7265. [PMID: 31188589 DOI: 10.1021/acs.jafc.9b01722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study investigated the environmental fate of myrigalone A, a light absorbing natural herbicide found on leaves and fruits of Myrica gale. Myrigalone A was irradiated in water and as a dry solid deposit to simulate reactions on leaves, alone and in the presence of the terpenes generated by Myrica gale. The phototransformation was fast ( t1/2 = 35 min in water). Analyses by liquid chromatography coupled to high resolution orbitrap electrospray mass spectrometry (MS) and gas chromatography-MS revealed the formation of 11 photoproducts in water and solid and 9 in gaseous phase. Some were detected in the leaf glands and oil covering the fruits of Myrica gale, which suggested that photodegradation occurred in the field. Moreover, myrigalone A photoinduced the oxidation of terpenes that in turn protected it against photolysis. This highlights the need for additional research on the effect of terpenes on the photodegradation of pesticides on vegetation.
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Affiliation(s)
- Amina Khaled
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| | - Mohamad Sleiman
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| | - Etienne Darras
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| | - Aurélien Trivella
- UMR CNRS 5805 EPOC - OASU, Equipe LPTC, IUT de Périgueux , Rue du Doyen Lajugie , 24000 Périgueux , France
| | - Cédric Bertrand
- USR 3278 CRIOBE, PSL Research University, EPHE-UPVD-CNRS, Université de Perpignan Via Domitia, Laboratoire d'Excellence ≪ CORAIL ≫ , Bâtiment T, 58 avenue P. Alduy , 66860 Perpignan , France
- AkiNaO SAS , F-66860 Perpignan , France
| | - Nicolas Inguimbert
- USR 3278 CRIOBE, PSL Research University, EPHE-UPVD-CNRS, Université de Perpignan Via Domitia, Laboratoire d'Excellence ≪ CORAIL ≫ , Bâtiment T, 58 avenue P. Alduy , 66860 Perpignan , France
| | - Pascale Goupil
- INRA, PIAF , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| | - Claire Richard
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
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42
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Kromdijk J, Głowacka K, Long SP. Predicting light-induced stomatal movements based on the redox state of plastoquinone: theory and validation. Photosynth Res 2019; 141:83-97. [PMID: 30891661 PMCID: PMC6612513 DOI: 10.1007/s11120-019-00632-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 02/25/2019] [Indexed: 05/23/2023]
Abstract
Prediction of stomatal conductance is a key element to relate and scale up leaf-level gas exchange processes to canopy, ecosystem and land surface models. The empirical models that are typically employed for this purpose are simple and elegant formulations which relate stomatal conductance on a leaf area basis to the net rate of CO2 assimilation, humidity and CO2 concentration. Although light intensity is not directly modelled as a stomatal opening cue, it is well-known that stomata respond strongly to light. One response mode depends specifically on the blue-light part of the light spectrum, whereas the quantitative or 'red' light response is less spectrally defined and relies more on the quantity of incident light. Here, we present a modification of an empirical stomatal conductance model which explicitly accounts for the stomatal red-light response, based on a mesophyll-derived signal putatively initiated by the chloroplastic plastoquinone redox state. The modified model showed similar prediction accuracy compared to models using a relationship between stomatal conductance and net assimilation rate. However, fitted parameter values with the modified model varied much less across different measurement conditions, lessening the need for frequent re-parameterization to different conditions required of the current model. We also present a simple and easy to parameterize extension to the widely used Farquhar-Von Caemmerer-Berry photosynthesis model to facilitate coupling with the modified stomatal conductance model, which should enable use of the new stomatal conductance model to simulate ecosystem water vapour exchange in terrestrial biosphere models.
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Affiliation(s)
- Johannes Kromdijk
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 West Gregory Drive, Urbana, IL, 61801, USA.
- Department of Plant Sciences, University of Cambridge, Downing Site, Cambridge, CB23EA, UK.
| | - Katarzyna Głowacka
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 West Gregory Drive, Urbana, IL, 61801, USA
- Institute of Plant Genetics, Polish Academy of Sciences, 60-479, Poznan, Poland
- Department of Biochemistry, University of Nebraska-Lincoln, N246 Beadle Center, 1901 Vine Street, Lincoln, NE, USA
| | - Stephen P Long
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 West Gregory Drive, Urbana, IL, 61801, USA
- Lancaster Environment Centre, University of Lancaster, Bailrigg, LA1 1YX, UK
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Luo T, Wang Z, Wang Y, Liu Z, P Pozdnyakov I. Different Role of Bisulfite/Sulfite in UVC-S(IV)-O 2 System for Arsenite Oxidation in Water. Molecules 2019; 24:E2307. [PMID: 31234408 PMCID: PMC6631152 DOI: 10.3390/molecules24122307] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/12/2019] [Accepted: 06/14/2019] [Indexed: 11/17/2022] Open
Abstract
It is of interest to use UV-sulfite based processes to degrade pollutants in wastewater treatment process. In this work, arsenic (As(III)) has been selected as a target pollutant to verify the efficacy of such a hypothesized process. The results showed that As(III) was quickly oxidized by a UV-sulfite system at neutral or alkaline pH and especially at pH 9.5, which can be mainly attributed to the generated oxysulfur radicals. In laser flash photolysis (LFP) experiments (λex = 266 nm), the signals of SO3•- and eaq- generated by photolysis of sulfite at 266 nm were discerned. Quantum yields for photoionization of HSO3- (0.01) and SO32- (0.06) were also measured. It has been established that eaq- does not react with SO32-, but reacts with HSO3- with a rate constant 8 × 107 M-1s-1.
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Affiliation(s)
- Tao Luo
- Department of Environmental Science and Engineering, School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China.
| | - Zhenhua Wang
- Department of Environmental Science and Engineering, School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China.
| | - Yi Wang
- School of Civil Engineering, Engineering Research Center of Urban Disasters Prevention and Fire Rescue Technology of Hubei Province, Wuhan University, Wuhan 430072, China.
| | - Zizheng Liu
- School of Civil Engineering, Engineering Research Center of Urban Disasters Prevention and Fire Rescue Technology of Hubei Province, Wuhan University, Wuhan 430072, China.
| | - Ivan P Pozdnyakov
- Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya 3, 630090 Novosibirsk, Russia.
- Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia.
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Li Y, Du Z, Liu X, Ma M, Yu D, Lu Y, Ren J, Qu X. Near-Infrared Activated Black Phosphorus as a Nontoxic Photo-Oxidant for Alzheimer's Amyloid-β Peptide. Small 2019; 15:e1901116. [PMID: 31069962 DOI: 10.1002/smll.201901116] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/01/2019] [Indexed: 05/28/2023]
Abstract
The inhibition of amyloid-β (Aβ) aggregation by photo-oxygenation has become an effective way of treating Alzheimer's disease (AD). New near-infrared (NIR) activated treatment agents, which not only possess high photo-oxygenation efficiency, but also show low biotoxicity, are urgently needed. Herein, for the first time, it is demonstrated that NIR activated black phosphorus (BP) could serve as an effective nontoxic photo-oxidant for amyloid-β peptide in vitro and in vivo. The nanoplatform BP@BTA (BTA: one of thioflavin-T derivatives) possesses high affinity to the Aβ peptide due to specific amyloid selectivity of BTA. Importantly, under NIR light, BP@BTA can significantly generate a high quantum yield of singlet oxygen (1 O2 ) to oxygenate Aβ, thereby resulting in inhibiting the aggregation and attenuating Aβ-induced cytotoxicity. In addition, BP could finally degrade into nontoxic phosphate, which guarantees the biosafety. Using transgenic Caenorhabditis elegans CL2006 as AD model, the results demonstrate that the 1 O2 -generation system could dramatically promote life-span extension of CL2006 strain by decreasing the neurotoxicity of Aβ.
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Affiliation(s)
- Yang Li
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| | - Zhi Du
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| | - Xinping Liu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| | - Mengmeng Ma
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| | - Dongqin Yu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| | - Yao Lu
- School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun, Jilin, 130012, China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
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Żądło AC. Application of transition metal ions in a study of photoinduced modifications of melanin. Acta Biochim Pol 2019; 66:237-241. [PMID: 31095651 DOI: 10.18388/abp.2018_2802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 04/26/2019] [Indexed: 11/10/2022]
Abstract
Short wavelength visible light is viewed as the main agent responsible for oxidative modification of melanin in the human retinal pigment epithelium (RPE). The aim of this research was to study light-induced modifications of melanin using iron and zinc as molecular probes. A synthetic model of eumelanin was treated by intense violet light. The interaction of melanin with metal ions was examined by electron paramagnetic resonance (EPR) spectroscopy and a thiocyanate assay. Weak photodegradation of melanin was shown to increase exposure of melanin subunits, while stronger photodegradation caused a loss of melanin subunits. Iron-binding in such melanin was weak and nonspecific.
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Affiliation(s)
- Andrzej Czesław Żądło
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
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Lastre-Acosta AM, Vicente R, Mora M, Jáuregui-Haza UJ, Arques A, Teixeira ACSC. Photo-Fenton reaction at mildly acidic conditions: assessing the effect of bio-organic substances of different origin and characteristics through experimental design. J Environ Sci Health A Tox Hazard Subst Environ Eng 2019; 54:711-720. [PMID: 30873897 DOI: 10.1080/10934529.2019.1585721] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 02/01/2019] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
Urban-waste bio-organic substances (UW-BOS) have been shown to be capable of extending the photo-Fenton reaction to mildly acidic conditions. In this study, the effects of pH (3-7), UW-BOS, H2O2 and iron concentrations on the photo-Fenton process were systematically assessed using a Doehlert experimental design and response surface methodology for two UW-BOS (CVT230 and FORSUD). Solutions of the model antibiotic sulfadiazine (SDZ) were irradiated in a solar simulator equipped with a 550 W Xenon lamp. The results showed that for UW-BOS contents below 30 mg L-1, SDZ removal proceeds at pH 5 with similar rates for both CVT230 and FORSUD, regardless of Fe(III) concentration. For 50 mg L-1 of UW-BOS or higher, CVT230 performs better than FORSUD, even for low Fe(III) content (1-3 mg L-1). In contrast, half-life times of 35-40 min can only be achieved under mildly acidic conditions with FORSUD for iron concentrations higher than 10 mg L-1. The better performance of CVT230 can be associated with its high hydrophilic/hydrophobic ratio, low E2:E3, higher iron content and possibly higher yields of triplet reactive species generation upon solar irradiation. The most appropriate conditions for each UW-BOS studied are discussed for the first time, which are advantageous for possible engineered applications.
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Affiliation(s)
- Arlen Mabel Lastre-Acosta
- a Departamento de Engenharia Química , Grupo de Pesquisa em Processos Oxidativos Avançados/Research Group in Advanced Oxidation Processes (AdOx), Universidade de São Paulo , São Paulo , Brazil
| | - Rafael Vicente
- b Grupo Procesos Oxidación Avanzada, Departamento de Ingeniería Textil y Papelera , Universitat Politècnica de València , Alcoy , Spain
| | - Margarita Mora
- c Grupo Procesos Oxidación Avanzada, Departamento de Matemática Aplicada , Universitat Politècnica de València , Alcoy , Spain
| | | | - Antonio Arques
- b Grupo Procesos Oxidación Avanzada, Departamento de Ingeniería Textil y Papelera , Universitat Politècnica de València , Alcoy , Spain
| | - Antonio Carlos Silva Costa Teixeira
- a Departamento de Engenharia Química , Grupo de Pesquisa em Processos Oxidativos Avançados/Research Group in Advanced Oxidation Processes (AdOx), Universidade de São Paulo , São Paulo , Brazil
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Abstract
Herein, we report on the photoredox-initiated gold-mediated C(sp2)-CF3 and C(sp2)-N coupling reactions. By adopting gold as a platform for probing metallaphotoredox catalysis, we demonstrate that cationic gold(III) complexes are the key intermediates of the C-C and C-N coupling reactions. The high-valent gold(III) intermediates are accessed by virtue of photoredox catalysis through a radical chain process. In addition, the bond-forming step of the coupling reactions is the reductive elimination from cationic gold(III) intermediates, which is supported by isolation and crystallographic characterization of key Au(III) intermediates.
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Hamdani S, Khan N, Perveen S, Qu M, Jiang J, Zhu XG. Changes in the photosynthesis properties and photoprotection capacity in rice (Oryza sativa) grown under red, blue, or white light. Photosynth Res 2019; 139:107-121. [PMID: 30456488 DOI: 10.1007/s11120-018-0589-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 09/24/2018] [Indexed: 05/25/2023]
Abstract
Non-photochemical quenching (NPQ) of the excited state of chlorophyll a is a major photoprotective mechanism plants utilize to survive under high light. Here, we report the impact of long-term light quality treatment on photosynthetic properties, especially NPQ in rice. We used three LED-based light regimes, i.e., red (648-672 nm), blue (438-460 nm), and "warm" white light (529-624 nm), with the incident photon flux density of 300 µmol photons m-2 s-1, the difference in the absorbed photon flux densities by leaves grown under different light quality being less than 7%. Our results show that blue light, as compared to white light, induced a significant decrease in Fv/Fm, a decreased rate of reduction of P700+ after P700 was completely oxidized; furthermore, blue light also induced higher NPQ with an increased initial speed of NPQ induction, which corresponds to the qE component of NPQ, and a lower maximum quantum yield of PSII, i.e., Y(II). In contrast, rice grown under long-term red light showed decreased Y(II) and increased NPQ, but with no change in Fv/Fm. Furthermore, we found that rice grown under either blue or red light showed decreased transcript abundance of both catalase and ascorbate peroxidase, together with an increased H2O2 content, as compared to rice grown under white light. All these data suggest that even under a moderate incident light level, rice grown under blue or red light led to compromised antioxidant system, which contributed to decreased quantum yield of photosystem II and increased NPQ.
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Affiliation(s)
- Saber Hamdani
- National Key Laboratory for Plant Molecular Genetics, Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Naveed Khan
- Max-Planck Partner Institute of Computational Biology, Shanghai Institute of Biological Sciences, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Shahnaz Perveen
- National Key Laboratory for Plant Molecular Genetics, Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Mingnan Qu
- National Key Laboratory for Plant Molecular Genetics, Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Jianjun Jiang
- National Key Laboratory for Plant Molecular Genetics, Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Xin-Guang Zhu
- National Key Laboratory for Plant Molecular Genetics, Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China.
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Yang T, Xiao P, Zhang J, Jia R, Nawaz H, Chen Z, Zhang J. Multifunctional Cellulose Ester Containing Hindered Phenol Groups with Free-Radical-Scavenging and UV-Resistant Activities. ACS Appl Mater Interfaces 2019; 11:4302-4310. [PMID: 30411874 DOI: 10.1021/acsami.8b15642] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Excessive radicals and UV irradiation can trigger oxidative and physiological stresses, which cause tissue aging, human disease, food spoilage, and material degradation. In this study, a multifunctional cellulose ester containing hindered phenol groups, cellulose 3,5-di- tert-butyl-4-hydroxybenzoate (CBH), with free-radical-scavenging and UV-resistant activities was synthesized and used as a functional material. The obtained CBHs can effectively scavenge reactive nitrogen free radicals and hydroxyl free radicals in both solid and solution states. Moreover, CBHs have no cytotoxicity, and, on the contrary, they promote the proliferation of human epidermal keratinocytes. Benefiting from excellent solubility, processability, and formability, CBHs have been readily processed into flexible films, transparent coatings, and nanoribbons membranes. The highly transparent and flexible CBH film completely absorbs the light of 200-300 nm range and partially absorbs the light of 300-400 nm range, indicating a UV-shielding capability. After the CBHs were loaded on an ordinary facial mask by electrospinning or added into a hand cream, the resultant facial mask and hand cream exhibited outstanding free-radical-scavenging properties. In addition, CBHs can also be used to fabricate functional sprays with antioxidative and UV-shielding activities. Accordingly, the obtained CBHs have a huge potential in cosmetics, personal care products, biopharmaceuticals, papermaking, and art protection because of their excellent antioxidation, nontoxicity, UV resistance, formability, and odorless properties.
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Affiliation(s)
- Tiantian Yang
- CAS Key Laboratory of Engineering Plastics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences (CAS) , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Peng Xiao
- CAS Key Laboratory of Engineering Plastics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences (CAS) , Beijing 100190 , China
| | - Jinming Zhang
- CAS Key Laboratory of Engineering Plastics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences (CAS) , Beijing 100190 , China
| | - Ruonan Jia
- CAS Key Laboratory of Engineering Plastics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences (CAS) , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Haq Nawaz
- CAS Key Laboratory of Engineering Plastics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences (CAS) , Beijing 100190 , China
| | - Zhangyan Chen
- CAS Key Laboratory of Engineering Plastics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences (CAS) , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Jun Zhang
- CAS Key Laboratory of Engineering Plastics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences (CAS) , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
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Ciesielska S, Bil P, Gajda K, Poterala-Hejmo A, Hudy D, Rzeszowska-Wolny J. Cell type-specific differences in redox regulation and proliferation after low UVA doses. PLoS One 2019; 14:e0205215. [PMID: 30682016 PMCID: PMC6347369 DOI: 10.1371/journal.pone.0205215] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 01/04/2019] [Indexed: 01/09/2023] Open
Abstract
Ultraviolet A (UVA) radiation is harmful for living organisms but in low doses may stimulate cell proliferation. Our aim was to examine the relationships between exposure to different low UVA doses, cellular proliferation, and changes in cellular reactive oxygen species levels. In human colon cancer (HCT116) and melanoma (Me45) cells exposed to UVA doses comparable to environmental, the highest doses (30–50 kJ/m2) reduced clonogenic potential but some lower doses (1 and 10 kJ/m2) induced proliferation. This effect was cell type and dose specific. In both cell lines the levels of reactive oxygen species and nitric oxide fluctuated with dynamics which were influenced differently by UVA; in Me45 cells decreased proliferation accompanied the changes in the dynamics of H2O2 while in HCT116 cells those of superoxide. Genes coding for proteins engaged in redox systems were expressed differently in each cell line; transcripts for thioredoxin, peroxiredoxin and glutathione peroxidase showed higher expression in HCT116 cells whereas those for glutathione transferases and copper chaperone were more abundant in Me45 cells. We conclude that these two cell types utilize different pathways for regulating their redox status. Many mechanisms engaged in maintaining cellular redox balance have been described. Here we show that the different cellular responses to a stimulus such as a specific dose of UVA may be consequences of the use of different redox control pathways. Assays of superoxide and hydrogen peroxide level changes after exposure to UVA may clarify mechanisms of cellular redox regulation and help in understanding responses to stressing factors.
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Affiliation(s)
- Sylwia Ciesielska
- Biosystems Group, Institute of Automatic Control, Silesian University of Technology, Gliwice, Poland
| | - Patryk Bil
- Biosystems Group, Institute of Automatic Control, Silesian University of Technology, Gliwice, Poland
| | - Karolina Gajda
- Biosystems Group, Institute of Automatic Control, Silesian University of Technology, Gliwice, Poland
| | - Aleksandra Poterala-Hejmo
- Biosystems Group, Institute of Automatic Control, Silesian University of Technology, Gliwice, Poland
| | - Dorota Hudy
- Biosystems Group, Institute of Automatic Control, Silesian University of Technology, Gliwice, Poland
| | - Joanna Rzeszowska-Wolny
- Biosystems Group, Institute of Automatic Control, Silesian University of Technology, Gliwice, Poland
- * E-mail:
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