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Semwogerere F, Chikwanha OC, Katiyatiya CLF, Marufu MC, Mapiye C. Bioavailability of bioactive phytochemicals in selected tissues and excreta from goats fed hempseed cake (Cannabis sativa L.) finisher diets. Trop Anim Health Prod 2023; 55:262. [PMID: 37407730 PMCID: PMC10322766 DOI: 10.1007/s11250-023-03676-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 06/27/2023] [Indexed: 07/07/2023]
Abstract
Hempseeds are rich in bioactive phytochemicals, yet little is known about their bioavailability in tissues and excreta of animals fed hemp seed cake. The study evaluated the bioactive phytochemicals and their antioxidant activity in the blood, liver, meat, feces, and urine from goats fed finishing diets containing graded inclusions of hempseed cake (HSC). Twenty-five wether goats (26.8 ± 2.9 kg) of 4-5 months were randomly allocated to five experimental diets containing increasing levels of HSC (0, 25, 50, 75, 100 g/kg DM) substituted for soybean meal (SBM) as the main protein source. Goats were allowed for period of 21 days for adaptation, and blood, fecal, and urine samples were collected on the 28th day of the experiment. The liver and right longissimus thoracis et lumborum were respectively collected at 60 min and 24 h after slaughter. Linear increases (P ≤ 0.05) in blood, liver, and urine magnesium; fecal manganese; and fecal copper were observed with increasing HSC inclusion in the diet. Liver and fecal selenium exhibited a decreasing linear trend (P ≤ 0.05) with HSC increment in diets. Diet did not affect (P > 0.05) meat and urine mineral contents, except urine magnesium. The 2,2-diphenyl-1-picrylhydrazyl, and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) of the blood, liver, and meat linearly increased (P ≤ 0.05) with dietary inclusion of HSC. Blood and liver ferric reducing antioxidant power quadratically increased (P ≤ 0.05) with HSC inclusion reaching a maximum at 50 g/kg dry matter. Current results suggest that inclusion of HSC up to 100 g/kg substituting SBM in goat diets can improve bioavailability of bioactive phytochemicals in the blood, liver, and meat.
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Affiliation(s)
- Farouk Semwogerere
- Department of Animal Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Obert C Chikwanha
- Department of Animal Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Chenaimoyo L F Katiyatiya
- Department of Animal Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Munyaradzi C Marufu
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, 0110, South Africa
| | - Cletos Mapiye
- Department of Animal Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
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Mendonça JDS, Guimarães RDCA, Zorgetto-Pinheiro VA, Fernandes CDP, Marcelino G, Bogo D, Freitas KDC, Hiane PA, de Pádua Melo ES, Vilela MLB, do Nascimento VA. Natural Antioxidant Evaluation: A Review of Detection Methods. Molecules 2022; 27:3563. [PMID: 35684500 PMCID: PMC9182375 DOI: 10.3390/molecules27113563] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/19/2021] [Accepted: 11/24/2021] [Indexed: 02/04/2023] Open
Abstract
Antioxidants have drawn the attention of the scientific community due to being related to the prevention of various degenerative diseases. The antioxidant capacity has been extensively studied in vitro, and different methods have been used to assess its activity. However, the main issues related to studying natural antioxidants are evaluating whether these antioxidants demonstrate a key role in the biological system and assessing their bioavailability in the organism. The majority of outcomes in the literature are controversial due to a lack of method standardization and their proper application. Therefore, this study aims to compile the main issues concerning the natural antioxidant field of study, comparing the most common in vitro methods to evaluate the antioxidant activity of natural compounds, demonstrating the antioxidant activity in biological systems and the role of the main antioxidant enzymes of redox cellular signaling and explaining how the bioavailability of bioactive compounds is evaluated in animal models and human clinical trials.
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Affiliation(s)
- Jenifer da Silva Mendonça
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
| | - Rita de Cássia Avellaneda Guimarães
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
| | - Verônica Assalin Zorgetto-Pinheiro
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
| | - Carolina Di Pietro Fernandes
- Group of Spectroscopy and Bioinformatics Applied Biodiversity and Health (GEBABS), Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil;
| | - Gabriela Marcelino
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
| | - Danielle Bogo
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
| | - Karine de Cássia Freitas
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
| | - Priscila Aiko Hiane
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
| | - Elaine Silva de Pádua Melo
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
- Group of Spectroscopy and Bioinformatics Applied Biodiversity and Health (GEBABS), Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil;
- School of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil;
| | | | - Valter Aragão do Nascimento
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil; (J.d.S.M.); (R.d.C.A.G.); (V.A.Z.-P.); (G.M.); (D.B.); (K.d.C.F.); (P.A.H.); (E.S.d.P.M.)
- Group of Spectroscopy and Bioinformatics Applied Biodiversity and Health (GEBABS), Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil;
- School of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil;
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Yang Z, Shi Y, Li P, Pan K, Li G, Li X, Yao S, Zhang D. Application of Principal Component Analysis (PCA) to the Evaluation and Screening of Multiactivity Fungi. JOURNAL OF OCEAN UNIVERSITY OF CHINA : JOUC 2022; 21:763-772. [PMID: 35582545 PMCID: PMC9098371 DOI: 10.1007/s11802-022-5096-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 09/06/2021] [Accepted: 10/13/2021] [Indexed: 06/15/2023]
Abstract
Continued innovation in screening methodologies remains important for the discovery of high-quality multiactive fungi, which have been of great significance to the development of new drugs. Mangrove-derived fungi, which are well recognized as prolific sources of natural products, are worth sustained attention and further study. In this study, 118 fungi, which mainly included Aspergillus spp. (34.62%) and Penicillium spp. (15.38%), were isolated from the mangrove ecosystem of the Maowei Sea, and 83.1% of the cultured fungi showed at least one bioactivity in four antibacterial and three antioxidant assays. To accurately evaluate the fungal bioactivities, the fungi with multiple bioactivities were successfully evaluated and screened by principal component analysis (PCA), and this analysis provided a dataset for comparing and selecting multibioactive fungi. Among the 118 mangrove-derived fungi tested in this study, Aspergillus spp. showed the best comprehensive activity. Fungi such as A. clavatonanicus, A. flavipes and A. citrinoterreus, which exhibited high comprehensive bioactivity as determined by the PCA, have great potential in the exploitation of natural products and the development of new drugs. This study demonstrated the first use of PCA as a time-saving, scientific method with a strong ability to evaluate and screen multiactive fungi, which indicated that this method can affect the discovery and development of new drugs.
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Affiliation(s)
- Zonglin Yang
- Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao, 266100 China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100 China
| | - Yaqi Shi
- Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao, 266100 China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100 China
| | - Pinglin Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266100 China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266100 China
| | - Kanghong Pan
- Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao, 266100 China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100 China
| | - Guoqiang Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266100 China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266100 China
| | - Xianguo Li
- Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao, 266100 China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100 China
| | - Shuo Yao
- Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao, 266100 China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100 China
| | - Dahai Zhang
- Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao, 266100 China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100 China
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Requeijo TB, Serrano SHP, Moya HD. DNA damage in a solution containing copper(II) ions and ascorbic acid: Effect of the presence of sulfite. BRAZ J PHARM SCI 2021. [DOI: 10.1590/s2175-979020200004181084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Thais Boscolo Requeijo
- Faculdade de Medicina da Fundação do ABC - CEPES (Centro de Estudos, Pesquisa, Prevenção e Tratamento em Saúde), Brazil
| | | | - Horacio Dorigan Moya
- Faculdade de Medicina da Fundação do ABC - CEPES (Centro de Estudos, Pesquisa, Prevenção e Tratamento em Saúde), Brazil
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Shao B, Mao L, Shao J, Huang CH, Qin L, Huang R, Sheng ZG, Cao D, Zhang ZQ, Lin L, Zhang CZ, Zhu BZ. Mechanism of synergistic DNA damage induced by caffeic acid phenethyl ester (CAPE) and Cu(II): Competitive binding between CAPE and DNA with Cu(II)/Cu(I). Free Radic Biol Med 2020; 159:107-118. [PMID: 32755670 DOI: 10.1016/j.freeradbiomed.2020.06.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 06/13/2020] [Accepted: 06/21/2020] [Indexed: 12/26/2022]
Abstract
Caffeic acid phenethyl ester (CAPE) is an active polyphenol of propolis from honeybee hives, and exhibits antioxidant and interesting pharmacological activities. However, in this study, we found that in the presence of Cu(II), CAPE exhibited pro-oxidative rather than antioxidant effect: synergistic DNA damage was induced by the combination of CAPE and Cu(II) together as measured by strand breakage in plasmid DNA and 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG) formation, which is dependent on the molar ratio of CAPE:Cu(II). Production of Cu(I) and H2O2 from the redox reaction between CAPE and Cu(II), and subsequent OH formation was found to be responsible for the synergistic DNA damage. DNA sequencing investigations provided more direct evidence that CAPE/Cu(II) caused preferential cleavage at guanine, thymine and cytosine residues. Interestingly, we found there are competitive binding between CAPE and DNA with Cu(II)/Cu(I), which changed the redox activity of Cu(II)/Cu(I), via complementary applications of different analytical methods. The observed DNA damage was mainly attributed to the formation of DNA-Cu(II)/Cu(I) complexes, which is still redox active and initiated the redox reaction near the binding site between copper and DNA. Based on these data, we proposed that the synergistic DNA damage induced by CAPE/Cu(II) might be due to the competitive binding between CAPE and DNA with Cu, and site-specific production of OH near the binding site of copper with DNA. Our findings may have broad biological implications for future research on the pro-oxidative effects of phenolic compounds in the presence of transition metals.
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Affiliation(s)
- Bo Shao
- School of Public Health, Jining Medical University, Jining, Shandong, 272067, PR China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Li Mao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Jie Shao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Chun-Hua Huang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Li Qin
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Rong Huang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Zhi-Guo Sheng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Dong Cao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Zhao-Qiang Zhang
- School of Public Health, Jining Medical University, Jining, Shandong, 272067, PR China
| | - Li Lin
- School of Public Health, Jining Medical University, Jining, Shandong, 272067, PR China
| | - Chun-Zhi Zhang
- School of Public Health, Jining Medical University, Jining, Shandong, 272067, PR China
| | - Ben-Zhan Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences and University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100085, PR China; Joint Institute for Environmental Science, Research Center for Eco-Environmental Sciences and Hong Kong Baptist University, Beijing, PR China.
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6
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Wang G, Luo Y, Yang J, Hou C, Li J. Inhibitory effects of polyphenols-enriched extracts from Debregeasia orientalis leaf against human cervical cancer in vitro & in vivo. FOOD AGR IMMUNOL 2020. [DOI: 10.1080/09540105.2020.1712330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- Guoliang Wang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an, People’s Republic of China
- University Key Laboratory of Food Processing Byproducts for Advanced Development and High Value Utilization, Xi’an, People’s Republic of China
| | - Ying Luo
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an, People’s Republic of China
- University Key Laboratory of Food Processing Byproducts for Advanced Development and High Value Utilization, Xi’an, People’s Republic of China
| | - Junqi Yang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an, People’s Republic of China
- University Key Laboratory of Food Processing Byproducts for Advanced Development and High Value Utilization, Xi’an, People’s Republic of China
| | - Chen Hou
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an, People’s Republic of China
- University Key Laboratory of Food Processing Byproducts for Advanced Development and High Value Utilization, Xi’an, People’s Republic of China
| | - Jianke Li
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an, People’s Republic of China
- University Key Laboratory of Food Processing Byproducts for Advanced Development and High Value Utilization, Xi’an, People’s Republic of China
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Xi’an, People’s Republic of China
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Kan Y, Zhang Z, Yang K, Ti M, Ke Y, Wu L, Yang J, He Y. Influence of d-Amino Acids in Beer on Formation of Uric Acid. Food Technol Biotechnol 2019; 57:418-425. [PMID: 31866755 PMCID: PMC6902295 DOI: 10.17113/ftb.57.03.19.6022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Excessive intake of beer could increase serum uric acid levels, leading to high risk of gout, which was previously attributed to high purine content in beer. Recent reports that purine-rich vegetables and bean products do not cause higher uric acid levels do not support this theory. Why excessive intake of beer could increase a high risk of gout has been unclear. Other factors affecting the accumulation of uric acid in the blood have been explored. Beer contains relatively high levels of d-amino acids due to the racemization of l-amino acids induced by food processing. d-amino acid was catalyzed by d-amino acid oxidase to produce H2O2, which is further oxidized in the presence of Fe2+ to produce hydroxyl radicals, resulting in DNA damage and formation of a large amount of purine bases, which are oxidized to uric acid by a series of enzymes. Some food ingredients, such as vitamins and I-, prompt d-amino acids to form uric acid. d-amino acids in beer are one of the key factors responsible for the increase in uric acid levels. The biological response of d-amino acids could explain gout occurrence in beer drinkers.
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Affiliation(s)
- Yuhe Kan
- School of Chemical Sciences, University of Chinese Academy of Sciences, No.380 Huaibei Zhuang, Huairou District, 100049 Beijing, PR China
| | - Zhikun Zhang
- School of Chemical Sciences, University of Chinese Academy of Sciences, No.380 Huaibei Zhuang, Huairou District, 100049 Beijing, PR China
| | - Kunhao Yang
- School of Chemical Sciences, University of Chinese Academy of Sciences, No.380 Huaibei Zhuang, Huairou District, 100049 Beijing, PR China
| | - Mengru Ti
- School of Chemical Sciences, University of Chinese Academy of Sciences, No.380 Huaibei Zhuang, Huairou District, 100049 Beijing, PR China
| | - Yongqi Ke
- School of Chemical Sciences, University of Chinese Academy of Sciences, No.380 Huaibei Zhuang, Huairou District, 100049 Beijing, PR China
| | - Li Wu
- School of Chemical Sciences, University of Chinese Academy of Sciences, No.380 Huaibei Zhuang, Huairou District, 100049 Beijing, PR China.,State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Peking University, 100191 Beijing, PR China
| | - Jingkui Yang
- School of Chemical Sciences, University of Chinese Academy of Sciences, No.380 Huaibei Zhuang, Huairou District, 100049 Beijing, PR China
| | - Yujian He
- School of Chemical Sciences, University of Chinese Academy of Sciences, No.380 Huaibei Zhuang, Huairou District, 100049 Beijing, PR China.,State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Peking University, 100191 Beijing, PR China
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Li W, Yang H, Li C, Tan S, Gao X, Yao M, Zheng Q. Chemical composition, antioxidant activity and antitumor activity of tumorous stem mustard leaf and stem extracts. CYTA - JOURNAL OF FOOD 2019. [DOI: 10.1080/19476337.2019.1577303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Wenfeng Li
- School of Life Science and Biotechnology, Yangtze Normal University, Chongqing, China
| | - Hongyan Yang
- School of Aerospace Medicine, Fourth Military Medical University, Xi’an, China
| | - Changman Li
- School of Life Science and Biotechnology, Yangtze Normal University, Chongqing, China
| | - Si Tan
- School of Life Science and Biotechnology, Yangtze Normal University, Chongqing, China
| | - Xiaoxv Gao
- School of Life Science and Biotechnology, Yangtze Normal University, Chongqing, China
| | - Min Yao
- School of Life Science and Biotechnology, Yangtze Normal University, Chongqing, China
| | - Qiaoran Zheng
- School of Life Science and Biotechnology, Yangtze Normal University, Chongqing, China
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9
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Synthesis and preliminary biological evaluation of new phenolic and catecholic dehydroamino acid derivatives. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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10
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Shahabadi N, Mahdavi M, Taherpour A(A, Ghasemhezaveh F. Synthesis, characterization and in vitro DNA binding studies of a new copper(II) complex containing antioxidant ferulic acid. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1363890] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nahid Shahabadi
- Faculty of Chemistry, Department of Inorganic Chemistry, Razi University, Kermanshah, Iran
- Medical Biology Research Center (MBRC) Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Maryam Mahdavi
- Faculty of Chemistry, Department of Inorganic Chemistry, Razi University, Kermanshah, Iran
- Medical Biology Research Center (MBRC) Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Avat (Arman) Taherpour
- Medical Biology Research Center (MBRC) Kermanshah University of Medical Sciences, Kermanshah, Iran
- Faculty of Chemistry, Department of Organic Chemistry, Razi University, Kermanshah, Iran
| | - Fatemeh Ghasemhezaveh
- Faculty of Chemistry, Department of Organic Chemistry, Razi University, Kermanshah, Iran
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11
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Concentration-dependent anti-/pro-oxidant activity of natural phenolic compounds in bio-polyesters. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.05.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Li S, Dai S, Shah NP. Sulfonation and Antioxidative Evaluation of Polysaccharides from Pleurotus Mushroom and Streptococcus thermophilus Bacteria: A Review. Compr Rev Food Sci Food Saf 2017; 16:282-294. [PMID: 33371533 DOI: 10.1111/1541-4337.12252] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/06/2016] [Accepted: 12/07/2016] [Indexed: 11/29/2022]
Abstract
Human beings are equipped with antioxidant defense systems to neutralize free radicals as free radicals could damage macromolecules, subsequently resulting in serious diseases. Researchers have been attracted to search for potential natural antioxidants to reduce oxidative damage. Pleurotus and Streptococcus thermophilus have been chosen as sources of sustainable bioactive compounds that have been consumed for thousands of years. Polysaccharides are important bioactive components produced by Pleurotus mushrooms and Streptococcus thermophilus bacteria. Additionally, there is a continued interest in sulfonation of crude polysaccharides from both sources, since sulfonation has been found to improve or create new bioactive properties in polysaccharides. Both crude and sulfated polysaccharides with good antioxidant capacities have great potential for the further development as commercial products. This review focuses on characterization, sulfonation methods, and antioxidant capacity evaluations of polysaccharides from Pleurotus and S. thermophilus. Common antioxidant capacity assays, including the mechanisms underlying each assay, and various experimental procedures are also discussed.
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Affiliation(s)
- Siqian Li
- Food and Nutritional Science, School of Biological Sciences, The Univ. of Hong Kong, Pokfulam Rd., Hong Kong
| | - Shuhong Dai
- Food and Nutritional Science, School of Biological Sciences, The Univ. of Hong Kong, Pokfulam Rd., Hong Kong
| | - Nagendra Prasad Shah
- Food and Nutritional Science, School of Biological Sciences, The Univ. of Hong Kong, Pokfulam Rd., Hong Kong
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Kitamura Y, Nishikawa A, Nakamura H, Furukawa F, Imazawa T, Umemura T, Uchida K, Hirose M. Effects of N-Acetylcysteine, Quercetin, and Phytic Acid on Spontaneous Hepatic and Renal Lesions in LEC Rats. Toxicol Pathol 2016; 33:584-92. [PMID: 16178122 DOI: 10.1080/01926230500246675] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The effects of anti-oxidants were examined in Long-Evans Cinnamon (LEC) rats, which develop acute hepatic injury, and subsequent hepatic and renal tumors due to accumulation of excess Cu. The rats, at the age of 15 weeks, were supplied a diet containing either 1% of N-acetylcysteine (NAC), quercetin (QC), or phytic acid (PA), or basal diet alone. At weeks 2 and 6 posttreatment, animals were sacrificed for collection of blood and tissue samples. In the NAC-treated group, the development of hepatic and renal lesions was dramatically reduced. In addition, accumulation of Cu and Fe in the liver was suppressed. Acrolein-modified protein, a new marker for lipid peroxidation, was not detected in the liver or kidney of NAC treated rats, even though deposition was evident in control. Neither QC nor PA affected the development of spontaneous hepatic lesions. These results indicate that oxidative stress was reduced by NAC in the liver and kidney, and suggest that Cu and Fe may be involved in the generation of oxidative stress in the liver. In addition, it was suggested that the different effects of the anti-oxidants on lesion development in LEC rats might be related to different mechanisms of action with regard to oxidative stress.
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Affiliation(s)
- Yasuki Kitamura
- Division of Pathology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
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14
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Inhibitory effects of polyphenol-enriched extract from Ziyang tea against human breast cancer MCF-7 cells through reactive oxygen species-dependent mitochondria molecular mechanism. J Food Drug Anal 2016; 24:527-538. [PMID: 28911558 PMCID: PMC9336659 DOI: 10.1016/j.jfda.2016.01.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 12/03/2015] [Accepted: 01/21/2016] [Indexed: 01/24/2023] Open
Abstract
A polyphenol-enriched extract from selenium-enriched Ziyang green tea (ZTP) was selected to evaluate its antitumor effects against human breast cancer MCF-7 cells. In ZTP, (−)-epigallocatechin gallate (28.2%) was identified as the major catechin, followed by (−)-epigallocatechin (5.7%) and (−)-epicatechin gallate (12.6%). ZTP was shown to inhibit MCF-7 cell proliferation (half maximal inhibitory concentration, IC50 = 172.2 μg/mL) by blocking cell-cycle progression at the G0/G1 phase and inducing apoptotic death. Western blotting assay indicated that ZTP induced cell-cycle arrest by upregulation of p53 and reduced the expression of CDK2 in MCF-7 cells. ZTP-caused cell apoptosis was associated with an increase in Bax/Bcl-2 ratio, and activation of caspase-3 and -9. MCF-7 cells treated with ZTP also showed an overproduction of reactive oxygen species, suggesting that reactive oxygen species played an important role in the induction of apoptosis in MCF-7 cells. This is the first report showing that ZTP is a potential novel dietary agent for cancer chemoprevention or chemotherapy.
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15
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Apak R, Özyürek M, Güçlü K, Çapanoğlu E. Antioxidant Activity/Capacity Measurement. 2. Hydrogen Atom Transfer (HAT)-Based, Mixed-Mode (Electron Transfer (ET)/HAT), and Lipid Peroxidation Assays. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:1028-1045. [PMID: 26805392 DOI: 10.1021/acs.jafc.5b04743] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Measuring the antioxidant activity/capacity levels of food extracts and biological fluids is useful for determining the nutritional value of foodstuffs and for the diagnosis, treatment, and follow-up of numerous oxidative stress-related diseases. Biologically, antioxidants play their health-beneficial roles via transferring a hydrogen (H) atom or an electron (e(-)) to reactive species, thereby deactivating them. Antioxidant activity assays imitate this action; that is, antioxidants are measured by their H atom transfer (HAT) or e(-) transfer (ET) to probe molecules. Antioxidant activity/capacity can be monitored by a wide variety of assays with different mechanisms, including HAT, ET, and mixed-mode (ET/HAT) assays, generally without distinct boundaries between them. Understanding the principal mechanisms, advantages, and disadvantages of the measurement assays is important for proper selection of method for valid evaluation of antioxidant properties in desired applications. This work provides a general and up-to-date overview of HAT-based, mixed-mode (ET/HAT), and lipid peroxidation assays available for measuring antioxidant activity/capacity and the chemistry behind them, including a critical evaluation of their advantages and drawbacks.
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Affiliation(s)
- Reşat Apak
- Department of Chemistry, Faculty of Engineering, Istanbul University , Avcilar, 34320 Istanbul, Turkey
| | - Mustafa Özyürek
- Department of Chemistry, Faculty of Engineering, Istanbul University , Avcilar, 34320 Istanbul, Turkey
| | - Kubilay Güçlü
- Department of Chemistry, Faculty of Engineering, Istanbul University , Avcilar, 34320 Istanbul, Turkey
| | - Esra Çapanoğlu
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University , Maslak, 34469 Istanbul, Turkey
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16
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Bulcke F, Santofimia-Castaño P, Gonzalez-Mateos A, Dringen R. Modulation of copper accumulation and copper-induced toxicity by antioxidants and copper chelators in cultured primary brain astrocytes. J Trace Elem Med Biol 2015; 32:168-76. [PMID: 26302925 DOI: 10.1016/j.jtemb.2015.07.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 06/30/2015] [Accepted: 07/03/2015] [Indexed: 12/22/2022]
Abstract
Copper is essential for several important cellular processes, but an excess of copper can also lead to oxidative damage. In brain, astrocytes are considered to play a pivotal role in the copper homeostasis and antioxidative defence. To investigate whether antioxidants and copper chelators can modulate the uptake and the toxicity of copper ions in brain astrocytes, we used primary astrocytes as cell culture model. These cells accumulated substantial amounts of copper during exposure to copper chloride. Copper accumulation was accompanied by a time- and concentration-dependent loss in cell viability, as demonstrated by a lowering in cellular MTT reduction capacity and by an increase in membrane permeability for propidium iodide. During incubations in the presence of the antioxidants ascorbate, trolox or ebselen, the specific cellular copper content and the toxicity in copper chloride-treated astrocyte cultures were strongly increased. In contrast, the presence of the copper chelators bathocuproine disulfonate or tetrathiomolybdate lowered the cellular copper accumulation and the copper-induced as well as the ascorbate-accelerated copper toxicity was fully prevented. These data suggest that predominantly the cellular content of copper determines copper-induced toxicity in brain astrocytes.
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Affiliation(s)
- Felix Bulcke
- Center for Biomolecular Interactions Bremen, Faculty 2 (Biology/Chemistry), University of Bremen, PO Box 330440, D-28334 Bremen, Germany; Center for Environmental Research and Sustainable Technology, Leobener Strasse, D-28359 Bremen, Germany
| | - Patricia Santofimia-Castaño
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, E-10003 Caceres, Spain
| | - Antonio Gonzalez-Mateos
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, E-10003 Caceres, Spain
| | - Ralf Dringen
- Center for Biomolecular Interactions Bremen, Faculty 2 (Biology/Chemistry), University of Bremen, PO Box 330440, D-28334 Bremen, Germany; Center for Environmental Research and Sustainable Technology, Leobener Strasse, D-28359 Bremen, Germany.
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17
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Sarwar T, Zafaryab M, Husain MA, Ishqi HM, Rehman SU, Rizvi MMA, Tabish M. Redox cycling of endogenous copper by ferulic acid leads to cellular DNA breakage and consequent cell death: A putative cancer chemotherapy mechanism. Toxicol Appl Pharmacol 2015; 289:251-61. [PMID: 26415834 DOI: 10.1016/j.taap.2015.09.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Revised: 09/15/2015] [Accepted: 09/24/2015] [Indexed: 12/12/2022]
Abstract
Ferulic acid (FA) is a plant polyphenol showing diverse therapeutic effects against cancer, diabetes, cardiovascular and neurodegenerative diseases. FA is a known antioxidant at lower concentrations, however at higher concentrations or in the presence of metal ions such as copper, it may act as a pro-oxidant. It has been reported that copper levels are significantly raised in different malignancies. Cancer cells are under increased oxidative stress as compared to normal cells. Certain therapeutic substances like polyphenols can further increase this oxidative stress and kill cancer cells without affecting the proliferation of normal cells. Through various in vitro experiments we have shown that the pro-oxidant properties of FA are enhanced in the presence of copper. Comet assay demonstrated the ability of FA to cause oxidative DNA breakage in human peripheral lymphocytes which was ameliorated by specific copper-chelating agent such as neocuproine and scavengers of ROS. This suggested the mobilization of endogenous copper in ROS generation and consequent DNA damage. These results were further validated through cytotoxicity experiments involving different cell lines. Thus, we conclude that such a pro-oxidant mechanism involving endogenous copper better explains the anticancer activities of FA. This would be an alternate non-enzymatic, and copper-mediated pathway for the cytotoxic activities of FA where it can selectively target cancer cells with elevated levels of copper and ROS.
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Affiliation(s)
- Tarique Sarwar
- Department of Biochemistry, Faculty of Life Sciences, A.M. University, Aligarh, UP 202002, India
| | - Md Zafaryab
- Genome Biology Lab, Department of Biosciences, Jamia Millia Islamia, Central University, New Delhi 110025, India
| | - Mohammed Amir Husain
- Department of Biochemistry, Faculty of Life Sciences, A.M. University, Aligarh, UP 202002, India
| | - Hassan Mubarak Ishqi
- Department of Biochemistry, Faculty of Life Sciences, A.M. University, Aligarh, UP 202002, India
| | - Sayeed Ur Rehman
- Department of Biochemistry, Faculty of Life Sciences, A.M. University, Aligarh, UP 202002, India
| | - M Moshahid Alam Rizvi
- Genome Biology Lab, Department of Biosciences, Jamia Millia Islamia, Central University, New Delhi 110025, India
| | - Mohammad Tabish
- Department of Biochemistry, Faculty of Life Sciences, A.M. University, Aligarh, UP 202002, India.
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18
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Miska-Schramm A, Kruczek M, Kapusta J. Effect of copper exposure on reproductive ability in the bank vole (Myodes glareolus). ECOTOXICOLOGY (LONDON, ENGLAND) 2014; 23:1546-1554. [PMID: 25098774 DOI: 10.1007/s10646-014-1295-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/22/2014] [Indexed: 06/03/2023]
Abstract
The amount of copper in natural ecosystems is steadily increasing, due to human activities. It accumulates in plants, posing a threat to herbivores. In polluted areas the population density of small rodents is observed to be lower. The decline in rodent numbers may be caused by increased mortality or diminished fertility. This study examined the effect of copper on the reproductive activity of the bank vole (Myodes glareolus), a small rodent which during foraging often wanders into fields where it might be exposed to pollution. The animals were treated with solutions of 0, 150 or 600 ppm Cu. After 12 weeks of exposure the quality and quantity of the male's sperm was tested. To assess morphological development we compared the experimental groups for body weight, the weight of the male's testes and accessory sex glands, the female's uterus, and the number of matured ovary follicles in tested females. At both doses, copper administration led to lower sperm count and caused sperm head anomalies. The higher dose compromised sperm tail membrane integrity, viability and motility. No effect of copper on morphological development was observed in males, and only the lower dose increased testes weight. In females the higher dose had a negative effect on morphological development, and the lower dose increased uterus weight. No effect of copper on ovarian follicle number was found. For the first time, the morphology of the most typical ovarian follicles of the bank vole is presented.
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Affiliation(s)
- Agata Miska-Schramm
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland,
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19
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Pal S, Dey SK, Saha C. Inhibition of catalase by tea catechins in free and cellular state: a biophysical approach. PLoS One 2014; 9:e102460. [PMID: 25025898 PMCID: PMC4099323 DOI: 10.1371/journal.pone.0102460] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 06/19/2014] [Indexed: 01/04/2023] Open
Abstract
Tea flavonoids bind to variety of enzymes and inhibit their activities. In the present study, binding and inhibition of catalase activity by catechins with respect to their structure-affinity relationship has been elucidated. Fluorimetrically determined binding constants for (-)-epigallocatechin gallate (EGCG) and (-)-epicatechin gallate (ECG) with catalase were observed to be 2.27×106 M(-1) and 1.66×106 M(-1), respectively. Thermodynamic parameters evidence exothermic and spontaneous interaction between catechins and catalase. Major forces of interaction are suggested to be through hydrogen bonding along with electrostatic contributions and conformational changes. Distinct loss of α-helical structure of catalase by interaction with EGCG was captured in circular dichroism (CD) spectra. Gallated catechins demonstrated higher binding constants and inhibition efficacy than non-gallated catechins. EGCG exhibited maximum inhibition of pure catalase. It also inhibited cellular catalase in K562 cancer cells with significant increase in cellular ROS and suppression of cell viability (IC50 54.5 µM). These results decipher the molecular mechanism by which tea catechins interact with catalase and highlight the potential of gallated catechin like EGCG as an anticancer drug. EGCG may have other non-specific targets in the cell, but its anticancer property is mainly defined by ROS accumulation due to catalase inhibition.
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Affiliation(s)
- Sandip Pal
- Department of Biotechnology, West Bengal University of Technology, Kolkata, West Bengal, India
| | - Subrata Kumar Dey
- Department of Biotechnology, West Bengal University of Technology, Kolkata, West Bengal, India
| | - Chabita Saha
- Department of Biotechnology, West Bengal University of Technology, Kolkata, West Bengal, India
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Bhattacharyya A, Chattopadhyay R, Mitra S, Crowe SE. Oxidative stress: an essential factor in the pathogenesis of gastrointestinal mucosal diseases. Physiol Rev 2014; 94:329-54. [PMID: 24692350 DOI: 10.1152/physrev.00040.2012] [Citation(s) in RCA: 1355] [Impact Index Per Article: 135.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Reactive oxygen species (ROS) are generated as by-products of normal cellular metabolic activities. Superoxide dismutase, glutathione peroxidase, and catalase are the enzymes involved in protecting cells from the damaging effects of ROS. ROS are produced in response to ultraviolet radiation, cigarette smoking, alcohol, nonsteroidal anti-inflammatory drugs, ischemia-reperfusion injury, chronic infections, and inflammatory disorders. Disruption of normal cellular homeostasis by redox signaling may result in cardiovascular, neurodegenerative diseases and cancer. ROS are produced within the gastrointestinal (GI) tract, but their roles in pathophysiology and disease pathogenesis have not been well studied. Despite the protective barrier provided by the mucosa, ingested materials and microbial pathogens can induce oxidative injury and GI inflammatory responses involving the epithelium and immune/inflammatory cells. The pathogenesis of various GI diseases including peptic ulcers, gastrointestinal cancers, and inflammatory bowel disease is in part due to oxidative stress. Unraveling the signaling events initiated at the cellular level by oxidative free radicals as well as the physiological responses to such stress is important to better understand disease pathogenesis and to develop new therapies to manage a variety of conditions for which current therapies are not always sufficient.
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21
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Assessment and comparison of the antioxidant activities and nitrite scavenging activity of commonly consumed beverages in Korea. Food Chem 2014; 151:58-64. [DOI: 10.1016/j.foodchem.2013.11.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 10/29/2013] [Accepted: 11/06/2013] [Indexed: 11/18/2022]
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22
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Panikkanvalappil SR, Mahmoud MA, Mackey MA, El-Sayed MA. Surface-enhanced Raman spectroscopy for real-time monitoring of reactive oxygen species-induced DNA damage and its prevention by platinum nanoparticles. ACS NANO 2013; 7:7524-33. [PMID: 23952174 DOI: 10.1021/nn403722x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
We have successfully demonstrated the potential of surface-enhanced Raman spectroscopy (SERS) in monitoring the real time damage to genomic DNA. To reveal the capabilities of this technique, we exposed DNA to reactive oxygen species (ROS), an agent that has been implicated in causing DNA double-strand breaks, and the various stages of free radical-induced DNA damage have been monitored by using SERS. Besides this, we showed that prompt DNA aggregation followed by DNA double-strand scission and residual damage to the DNA bases caused by the ROS could be substantially reduced by the protective effect of Pt nanocages and nearly cubical Pt nanopartcles. The antioxidant activity of Pt nanoparticles was further confirmed by the cell viability studies. On the basis of SERS results, we identified various stages involved in the mechanism of action of ROS toward DNA damage, which involves the DNA double-strand scission and its aggregation followed by the oxidation of DNA bases. We found that Pt nanoparticles inhibit the DNA double-strand scission to a significant extent by the degradation of ROS. Our method illustrates the capability of SERS technique in giving vital information about the DNA degradation reactions at molecular level, which may provide insight into the effectiveness and mechanism of action of many drugs in cancer therapy.
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Affiliation(s)
- Sajanlal R Panikkanvalappil
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332-0400, United States
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23
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Bhattacharyya S, Sarkar A, Dey SK, Jose GP, Mukherjee A, Sengupta TK. Copper(ii) complex of methionine conjugated bis-pyrazole based ligand promotes dual pathway for DNA cleavage. Dalton Trans 2013; 42:11709-19. [DOI: 10.1039/c3dt51296g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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24
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Liu GY, Yang J, Dai F, Yan WJ, Wang Q, Li XZ, Ding DJ, Cao XY, Zhou B. CuIIIons and the Stilbene-Chroman Hybrid with a Catechol Moiety Synergistically Induced DNA Damage, and Cell Cycle Arrest and Apoptosis of HepG2 Cells: An Interesting Acid/Base-Promoted Prooxidant Reaction. Chemistry 2012; 18:11100-6. [DOI: 10.1002/chem.201201545] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Indexed: 12/20/2022]
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25
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Błaszczyk I, Birkner E, Gutowska I, Romuk E, Chlubek D. Influence of methionine and vitamin E on fluoride concentration in bones and teeth of rats exposed to sodium fluoride in drinking water. Biol Trace Elem Res 2012; 146:335-9. [PMID: 22068731 DOI: 10.1007/s12011-011-9251-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Accepted: 10/25/2011] [Indexed: 01/24/2023]
Abstract
Increased exposure to fluorine-containing compounds leads to accumulation of fluorides in hard tissues of bones and teeth, which may result in numerous skeletal and dental disorders. This study evaluates the influence of methionine and vitamin E on fluoride concentration in bones and teeth of rats subjected to long-term exposure to sodium fluoride in drinking water. The study was conducted in 30 3-month-old female Wistar FL rats. The animals were divided into five groups, six rats per group. The control group consisted of rats receiving only distilled water as drinking water. All other groups received NaF in the amount of 10 mg/kg of body mass/day in their drinking water. In addition, respective animal groups received: NaF + Met group--10 mg of methionine/kg of body mass/day, NaF + Met + E group--10 mg of methionine/kg of body mass/day and 3 mg of vitamin E (tocopheroli acetas)/rat/day and NaF + E group--3 mg of vitamin E/rat/day. Femoral bones and incisor teeth were collected for the study, and the fluoride concentration was determined using a fluoride ion-selective electrode. Fluoride concentration in both bones and teeth was found to be higher in the NaF and NaF + Met groups compared to the control group. In groups NaF + Met + E and NaF + E, the study material contained much lower fluoride concentration compared to the NaF group, while the effect was more prominent in the NaF + E group. The results of the studies indicate that methionine and vitamin E have opposite effects on accumulation of fluorides in hard tissue in rats. By stimulating fluoride accumulation, methionine reduces the adverse effect of fluorides on soft tissue, while vitamin E, which prevents excessive accumulation of fluorides in bones and teeth, protects these tissues from fluorosis. Therefore, it seems that combined application of both compounds would be optimal for the prevention of the adverse effects of chronic fluoride intoxication.
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Affiliation(s)
- Iwona Błaszczyk
- Department of Biochemistry, Silesian Medical University, 19 Jordana Str., 41-808 Zabrze, Poland.
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26
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Novel molecular combination deriving from natural aminoacids and polyphenols: Design, synthesis and free-radical scavenging activities. Eur J Med Chem 2012; 50:383-92. [DOI: 10.1016/j.ejmech.2012.02.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Revised: 02/06/2012] [Accepted: 02/08/2012] [Indexed: 11/23/2022]
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27
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Liu M, Zhang Q, Zhao H, Chen S, Yu H, Zhang Y, Quan X. Controllable oxidative DNA cleavage-dependent regulation of graphene/DNA interaction. Chem Commun (Camb) 2011; 47:4084-6. [DOI: 10.1039/c1cc00107h] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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28
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Affiliation(s)
- Zai-Qun Liu
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun 130021, China
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29
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Fan GJ, Jin XL, Qian YP, Wang Q, Yang RT, Dai F, Tang JJ, Shang YJ, Cheng LX, Yang J, Zhou B. Hydroxycinnamic Acids as DNA-Cleaving Agents in the Presence of CuIIIons: Mechanism, StructureâActivity Relationship, and Biological Implications. Chemistry 2009; 15:12889-99. [DOI: 10.1002/chem.200901627] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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30
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Kalinina MA, Arslanov VV, Turygin DS, Gagina IA. Molecular recognition of uracil and adenine nucleobases by Langmuir monolayers of metal complexes of amphiphilic cyclen. COLLOID JOURNAL 2009. [DOI: 10.1134/s1061933x09050068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Hirakawa K, Sano S. Platinum Nanoparticle Catalyst Scavenges Hydrogen Peroxide Generated from Hydroquinone. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.1299] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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32
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Oikawa S, Nagao E, Sakano K, Kawanishi S. Mechanism of oxidative DNA damage induced by capsaicin, a principal ingredient of hot chili pepper. Free Radic Res 2009; 40:966-73. [PMID: 17015277 DOI: 10.1080/10715760600827483] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Although capsaicin exhibits antitumor activity, carcinogenic potential has also been reported. To clarify the mechanism for expression of potential carcinogenicity of capsaicin, we examined DNA damage induced by capsaicin in the presence of metal ion and various kinds of cytochrome P450 (CYP) using 32P-5'-end-labeled DNA fragments. Capsaicin induced Cu(II)-mediated DNA damage efficiently in the presence of CYP1A2 and partially in the presence of 2D6. CYP1A2-treated capsaicin caused double-base lesions at 5'-TG-3', 5'-GC-3' and CG of the 5'-ACG-3' sequence complementary to codon 273, a hotspot of p53 gene. DNA damage was inhibited by catalase and bathocuproine, a Cu(I) chelator, suggesting that reactive species derived from the reaction of H2O2 with Cu(I) participate in DNA damage. Formation of 8-oxo-7,8-dihydro-2'-deoxyguanosine was significantly increased by CYP1A2-treated capsaicin in the presence of Cu(II). Therefore, we conclude that Cu(II)-mediated oxidative DNA damage by CYP-treated capsaicin seems to be relevant for the expression of its carcinogenicity.
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Affiliation(s)
- Shinji Oikawa
- Mie University Graduate School of Medicine, Department of Environmental and Molecular Medicine, Mie, Japan
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33
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Gille L, Rosenau T, Kozlov A, Gregor W. Ubiquinone and tocopherol: Dissimilar siblings. Biochem Pharmacol 2008; 76:289-302. [DOI: 10.1016/j.bcp.2008.04.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2008] [Revised: 04/06/2008] [Accepted: 04/10/2008] [Indexed: 11/17/2022]
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34
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DNA damage induced by caffeic acid phenyl ester in the presence of Cu(II) ions: Potential mechanism of its anticancer properties. Cancer Lett 2008; 263:77-88. [DOI: 10.1016/j.canlet.2007.12.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2007] [Revised: 12/09/2007] [Accepted: 12/14/2007] [Indexed: 11/19/2022]
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35
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Palozza P, Simone R, Picci N, Buzzoni L, Ciliberti N, Natangelo A, Manfredini S, Vertuani S. Design, synthesis, and antioxidant potency of novel alpha-tocopherol analogues in isolated membranes and intact cells. Free Radic Biol Med 2008; 44:1452-64. [PMID: 18242194 DOI: 10.1016/j.freeradbiomed.2008.01.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Revised: 12/03/2007] [Accepted: 01/02/2008] [Indexed: 11/21/2022]
Abstract
In this study, we have designed novel chromanyl derivatives that share with alpha-tocopherol a chromanyl head but differ in the lateral chain in: (i) length and saturation (FEBL-45, 50, 70), (ii) position of double bonds in Z or E (FEBL-50 and 53 and their respective 6-chromanyl methyl derivatives FEBL-161 and 162), or (iii) presence of additional antioxidant molecules, such as the catechol compound hydroxytyrosol (FEBL-80) or dopamine (FEBL-82, 95). The efficiency of these compounds in preventing free-radical-induced oxidative stress was investigated in isolated membranes as well as intact cells. The results of this study clearly show that all compounds synthesized were active in: (i) inhibiting AAPH- or tert-BOOH-induced lipid peroxidation in microsomes and (ii) preventing H2O2-induced ROS production, cell damage, and heat-shock protein expression in immortalized RAT-1 fibroblasts. Such effects were dose- and time-dependent. Independent of the kind of pro-oxidant used, differences in the antioxidant potency of these compounds were found in relation to the chemical structure with respect to the natural alpha-tocopherol: (1) The concomitant presence of a chromanyl head and an additional aromatic ring markedly increased the antioxidant potency of the molecule. In particular, FEBL-82 and FEBL-95, resulting from the molecular combination of trolox and dopamine, were much more potent than alpha-tocopherol, alpha-tocotrienol, and the other synthetic compounds. Moreover, they were also more potent than trolox and dopamine, used alone or in combination, suggesting synergistic cooperative interactions in the molecule between chromanyl and catechol moieties. (2) The length of the side chain affected the antioxidant properties of the molecule: FEBL-70, which displays a bulky squalene side chain, was less effective than the natural alpha-tocotrienol and the synthetic FEBL-45 and FEBL-50. (3) The presence of polyunsaturated double bonds in the side chain in the Z configuration (FEBL-53, FEBL-162) increased the antioxidant potency of the molecule with respect to the E configuration (FEBL-50, FEBL-161).
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Affiliation(s)
- Paola Palozza
- Institute of General Pathology, Catholic University, 00168 Rome, Italy.
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Clioquinol inhibits peroxide-mediated toxicity through up-regulation of phosphoinositol-3-kinase and inhibition of p53 activity. Int J Biochem Cell Biol 2008; 40:1030-42. [DOI: 10.1016/j.biocel.2007.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Revised: 11/06/2007] [Accepted: 11/09/2007] [Indexed: 01/22/2023]
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Błaszczyk I, Grucka-Mamczar E, Kasperczyk S, Birkner E. Influence of fluoride on rat kidney antioxidant system: effects of methionine and vitamin E. Biol Trace Elem Res 2008; 121:51-9. [PMID: 18186000 DOI: 10.1007/s12011-007-8030-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Revised: 05/14/2007] [Accepted: 06/30/2007] [Indexed: 10/22/2022]
Abstract
The aim of the study has been to determine and compare the influence upon the kidney antioxidative system, exercised by administration of vitamin E, and vitamin E in combination with methionine, under conditions of oxidative stress induced by sodium fluoride. The experiment was carried out on Wistar FL rats (adult males) that, for 35 days, were administered water, NaF, NaF with vitamin E, or vitamin E with methionine (doses: 10 mg NaF/kg of body mass/24 h, 3 mg vitamin E per 10 microl per rat for 24 h, 2 mg methionine per rat for 24 h). The influence of administered sodium fluoride and antioxidants upon the antioxidative system in kidney was examined by analyzing the concentration of malondialdehyde (MDA) and the activity of the most important antioxidative enzymes (SOD, total and both its isoenzymes, GPX, GST, GR, and CAT). The studies carried out confirmed the disadvantageous effect of the administered dose of NaF upon the antixodiative system in rats (increase in the concentration MDA, decrease activity of all antioxidative enzymes). The administration of vitamin E increased the activity of studied enzymes with the exception of glutathione reductase GR; it also reduced the processes of lipid peroxidation. It has been found that combined doses of vitamin E and methionine were most effective in inhibiting lipid peroxidation processes. The results confirmed the antioxidative properties of methionine.
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Affiliation(s)
- Iwona Błaszczyk
- Department of Biochemistry, Silesian Medical University, 19 Jordana Str., Zabrze, 41-808, Poland.
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Zheng LF, Dai F, Zhou B, Yang L, Liu ZL. Prooxidant activity of hydroxycinnamic acids on DNA damage in the presence of Cu(II) ions: mechanism and structure-activity relationship. Food Chem Toxicol 2007; 46:149-56. [PMID: 17764801 DOI: 10.1016/j.fct.2007.07.010] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2006] [Revised: 06/01/2007] [Accepted: 07/17/2007] [Indexed: 12/25/2022]
Abstract
The prooxidant effect of hydroxycinnamic acids (HCAs), i.e., caffeic acid (CaA), chlorogenic acid (ChA), sinapic acid (SA), ferulic acid (FA), 3-hydroxycinnamic acid (3-HCA) and 4-hydroxycinnamic acid (4-HCA) on supercoiled pBR322 plasmid DNA strand breakage and calf thymus DNA damage in the presence of Cu(II) ions has been studied. It was found that the compounds bearing ortho-dihydroxyl group (CaA and ChA) or bearing 4-hydroxy-3-methoxyl group (SA and FA) exhibited remarkably higher activity in the DNA damage than the ones bearing no such functionalities. The good correlation between the DNA damaging activity and the oxidative potential of the compounds indicates that the electron transfer between HCAs and Cu(II) plays a crucial role in the reaction. UV-Visible spectral changes demonstrated that CaA or ChA can chelate with Cu(II) as a bidentate ligand, hence facilitating intramolecular electron transfer between CaA or ChA and Cu(II). The involvement of reactive oxygen species (ROS) and Cu(I) ions in the DNA damage were affirmed by the inhibition of DNA breakage using mannitol, glutathione (GSH), catalase and bathocuproinedisulfonic acid (BCDS). These results may have important implications regarding the proposed mechanism of apoptosis induced by phenol and endogenous metal ions.
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Affiliation(s)
- Li-Fang Zheng
- National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
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Nocentini S, Guggiari M, Rouillard D, Surgis S. Exacerbating Effect of Vitamin E Supplementation on DNA Damage Induced in Cultured Human Normal Fibroblasts by UVA Radiation¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2001)0730370eeoves2.0.co2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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40
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Hirakawa K, Yoshida M, Nagatsu A, Mizukami H, Rana V, Rawat MSM, Oikawa S, Kawanishi S. Chemopreventive Action of Xanthone Derivatives on Photosensitized DNA Damage¶. Photochem Photobiol 2007. [DOI: 10.1111/j.1751-1097.2005.tb00189.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Azqueta A, Arbillaga L, Pachón G, Cascante M, Creppy EE, López de Cerain A. A quinoxaline 1,4-di-N-oxide derivative induces DNA oxidative damage not attenuated by vitamin C and E treatment. Chem Biol Interact 2007; 168:95-105. [PMID: 17420013 DOI: 10.1016/j.cbi.2007.02.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2006] [Revised: 02/26/2007] [Accepted: 02/27/2007] [Indexed: 11/18/2022]
Abstract
Some anticancer compounds are pro-drugs which give rise to toxic species through enzymatic reduction. The quinoxaline-di-N-oxide derivative Q-85 HCl (7-chloro-3-[[(N,N-dimethylamino)propyl]amino]-2-quinoxalinecarbonitrile 1,4-di-N-oxide hydrochloride) is a bioreductive compound selectively toxic in hypoxia. Due to the possibility of secondary tumors the study of the genotoxic capability of antitumoral drugs is very important. The aim of this study was to assess the ability of Q-85 HCl to produce reactive oxygen species (ROS) and oxidative DNA damage in Caco-2 cells, both in hypoxia and in well-oxygenated conditions. Secondly, we attempted to evaluate the effect of vitamins C and E under hypoxic and normoxic conditions, in order to determine if these antioxidant substances modify Q-85 HCl effect in hypoxic cells or possibly exert a protective action in normal cells. Caco-2 cells were treated with Q-85 HCl for 2h, at high concentrations in normoxia (0.1-5 microM) and at low concentrations in hypoxia (0.002-0.1 microM). In normoxia, a dose-related significant increase in intracellular ROS level was evident; in hypoxia all the concentrations produced very high level of ROS. Just after the treatment and 24h later, oxidative DNA damage was evaluated by the modified comet assay after post-digestion of the cells with formamidopyrimidine-DNA glycosylase (FPG) and endonuclease III (Endo III). Q-85 HCl treatment evoked a significant dose-dependent increase in the total comet score of the cells both in hypoxia and normoxia, indicating that this compound or some metabolite is able to oxidize purine and pyrimidine bases. After 24h DNA damage caused by the compound was completely repaired with only one exception: cells treated with the highest concentration of Q-85 HCl in hypoxia and post-digested with FPG. Vitamin C (5-100 microM) and vitamin E (500-400 microM) did not have a pro-oxidant effect in Caco-2 cells. Treatment of cells with vitamin C (10 microM) or vitamin E (100 microM) did not significantly reduce oxidative DNA damage in hypoxia and normoxia. In conclusion, the use of these vitamins would not hinder toxicity against hypoxic cells, but a protective effect in normoxic cells was not evident.
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Affiliation(s)
- Amaia Azqueta
- Centro de Investigación en Farmacobiología Aplicada, University of Navarra, C/Irunlarrea 1, Pamplona, Spain
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Hiraku Y, Ito K, Hirakawa K, Kawanishi S. Photosensitized DNA Damage and its Protection via a Novel Mechanism†. Photochem Photobiol 2007; 83:205-12. [PMID: 16965181 DOI: 10.1562/2006-03-09-ir-840] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
UVA, which accounts for approximately 95% of solar UV radiation, can cause mutations and skin cancer. Based mainly on the results of our study, this paper summarizes the mechanisms of UVA-induced DNA damage in the presence of various photosensitizers, and also proposes a new mechanism for its chemoprevention. UVA radiation induces DNA damage at the 5'-G of 5'-GG-3' sequence in double-stranded DNA through Type I mechanism, which involves electron transfer from guanine to activated photosensitizers. Endogenous sensitizers such as riboflavin and pterin derivatives and an exogenous sensitizer nalidixic acid mediate DNA photodamage via this mechanism. The major Type II mechanism involves the generation of singlet oxygen from photoactivated sensitizers, including hematoporphyrin and a fluoroquinolone antibacterial lomefloxacin, resulting in damage to guanines without preference for consecutive guanines. UVA also produces superoxide anion radical by an electron transfer from photoexcited sensitizers to oxygen (minor Type II mechanism), and DNA damage is induced by reactive species generated through the interaction of hydrogen peroxide with metal ions. The involvement of these mechanisms in UVA carcinogenesis is discussed. In addition, we found that xanthone derivatives inhibited DNA damage caused by photoexcited riboflavin via the quenching of its excited triplet state. It is thus considered that naturally occurring quenchers including xanthone derivatives may act as novel chemopreventive agents against photocarcinogenesis.
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Affiliation(s)
- Yusuke Hiraku
- Department of Environmental and Molecular Medicine, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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Winterbone MS, Sampson MJ, Saha S, Hughes JC, Hughes DA. Pro-oxidant effect of alpha-tocopherol in patients with type 2 diabetes after an oral glucose tolerance test--a randomised controlled trial. Cardiovasc Diabetol 2007; 6:8. [PMID: 17316429 PMCID: PMC1819366 DOI: 10.1186/1475-2840-6-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2007] [Accepted: 02/22/2007] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND As a part of a larger study investigating the effects of alpha-tocopherol on gene expression in type 2 diabetics we observed a pro-oxidant effect of alpha-tocopherol which we believe may be useful in interpreting outcomes of large intervention trials of alpha-tocopherol. METHODS 19 type 2 diabetes subjects were randomised into two groups taking either 1200 IU/day of alpha-tocopherol or a matched placebo for 4 weeks. On day 0 and 29 of this study oxidative DNA damage was assessed in mononuclear cells from fasted blood samples and following a 2 h glucose tolerance test (GTT). RESULTS On day 0 there was no significant difference in oxidative DNA damage between the two groups or following a GTT. On day 29 there was no significant difference in oxidative DNA damage in fasted blood samples, however following a GTT there was a significant increase in oxidative DNA damage in the alpha-tocopherol treatment group. CONCLUSION High dose supplementation with alpha-tocopherol primes mononuclear cells from patients with type 2 diabetes for a potentially damaging response to acute hyperglycaemia.
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Affiliation(s)
- Mark S Winterbone
- Institute of Food Research, Norwich Research Park, Norwich, NR4 7UA, UK
| | - Mike J Sampson
- Bertram Diabetes Research Unit, Norfolk & Norwich University Hospital NHS Trust, Norwich, NR4 7UY, UK
| | - Shikha Saha
- Institute of Food Research, Norwich Research Park, Norwich, NR4 7UA, UK
| | - Jackie C Hughes
- Institute of Food Research, Norwich Research Park, Norwich, NR4 7UA, UK
| | - David A Hughes
- Institute of Food Research, Norwich Research Park, Norwich, NR4 7UA, UK
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Urbina-Cano P, Bobadilla-Morales L, Ramírez-Herrera MA, Corona-Rivera JR, Mendoza-Magaña ML, Troyo-Sanromán R, Corona-Rivera A. DNA damage in mouse lymphocytes exposed to curcumin and copper. J Appl Genet 2007; 47:377-82. [PMID: 17132903 DOI: 10.1007/bf03194648] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dietary polyphenolics, such as curcumin, have shown antioxidant and anti-inflammatory effects. Some antioxidants cause DNA strand breaks in excess of transition metal ions, such as copper. The aim of this study was to evaluate the in vitro effect of curcumin in the presence of increasing concentrations of copper to induce DNA damage in murine leukocytes by the comet assay. Balb-C mouse lymphocytes were exposed to 50 microM curcumin and various concentrations of copper (10 microM, 100 microM and 200 microM). Cellular DNA damage was detected by means of the alkaline comet assay. Our results show that 50 microM curcumin in the presence of 100-200 microM copper induced DNA damage in murine lymphocytes. Curcumin did not inhibit the oxidative DNA damage caused by 50 microM H2O2 in mouse lymphocytes. Moreover, 50 microM curcumin alone was capable of inducing DNA strand breaks under the tested conditions. The increased DNA damage by 50 mM curcumin was observed in the presence of various concentrations of copper, as detected by the alkaline comet assay.
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Affiliation(s)
- Patricia Urbina-Cano
- Laboratorio de Citogenética Genotoxicidad y Biomonitoreo, Instituto de Genética Humana Dr. Enrique Corona Rivera, Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, Mexico
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Price JA, Sanny CG, Shevlin D. Application of manual assessment of oxygen radical absorbent capacity (ORAC) for use in high throughput assay of “total” antioxidant activity of drugs and natural products. J Pharmacol Toxicol Methods 2006; 54:56-61. [PMID: 16337142 DOI: 10.1016/j.vascn.2005.11.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2005] [Accepted: 11/02/2005] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Antioxidants are of particular interest in a spectrum of diseases, and thus are an active area of drug discovery and design. It is important to make considered choices as to which assay chemistry will best serve for particular investigations. We examined the manual oxygen radical absorbent capacity (ORAC) assay for "total" antioxidant activity, including a direct comparison to an alternative technique, the AOP-490 assay, using a panel of extracts from 12 phylogenetically unrelated algae. METHODS The AOP-490 assay was done per manufacturer's protocol. The ORAC assay was done by hand, in 96-well plates, not by machine as had been previously published. Our ORAC calculations were done using an in-experiment antioxidant standard curve. Results were reported as equivalents of the antioxidant Trolox, which was used as a standard. RESULTS With the AOP-490 kit (from Oxis Research) widespread activity was found, but not in all samples. When the ORAC method was used to assay aliquots of the same extracts there was significant activity detected in all samples, and the rank order of activity by the two methods was not identical. The data showed the wide occurrence of antioxidants in algae. The standard curve with the manual ORAC assay was linear in the range tested (0-100 mM Trolox) and had excellent reproducibility. DISCUSSION The importance of the beneficial effects of antioxidants is currently an area of active interest for drug development, and thus it is of great value to have an assay that is robust and approximates "total" antioxidant activity in a high throughput format. The ORAC (oxygen radical absorbent capacity) method was adapted to microplates and an eight-channel pipette and was more effective in detecting "total" antioxidant activity than the AOP-490 assay. These results might vary with other types of samples, and would depend on the active agents measured, but do suggest the practical value of the ORAC assay for any laboratory not ready for robotics but using manual 96-well format assays, and the utility of the ORAC assay for evaluating algal, and probably other samples as well.
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Affiliation(s)
- Joseph A Price
- Department of Pathology, OSU-COM, 1111 W. 17th. St., Tulsa, OK 74107, USA.
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Poljšak B, Gazdag Z, Pesti M, Jenko-Brinovec S, Belagyi J, Plesničar S, Raspor P. Pro-oxidative versus antioxidative reactions between Trolox and Cr(VI): The role of H(2)O(2). ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2006; 22:15-19. [PMID: 21783680 DOI: 10.1016/j.etap.2005.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Accepted: 11/19/2005] [Indexed: 05/31/2023]
Abstract
The effect of the Vitamin E model compound Trolox in reactions with Cr(VI) in the presence or absence of hydrogen peroxide was investigated. The aim of this study was to establish and discuss potential Trolox-mediated pro-oxidative reactions. The importance of the Trolox:Cr(VI) ratio in the Cr(VI) reduction process was determined from the EPR spectra and DNA cleavage reactions. In the absence of hydrogen peroxide, reduction of Cr(VI) occurred with concomitant oxidation of Trolox to the phenoxyl radical. In the presence of hydrogen peroxide, Cr(V), produced by the reduction of Cr(VI), reduced hydrogen peroxide to the hydroxyl radical. The latter was detected by spin-trapping the methyl radical following reaction with N-methyl sulfoxide. During Cr(VI) reduction with Trolox, DNA single- or double-strand breaks due to Trolox radical formation were not observed. Relaxed DNA appeared only when H(2)O(2) was added to Trolox/Cr(VI) mixtures most probably due to hydroxyl radical formation during the redox cycling of Cr(V/IV)-species. Fenton-like reactions do not play a significant role in the Trolox/Cr(VI) system in the absence of added H(2)O(2).
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Affiliation(s)
- Borut Poljšak
- Polytechnic Nova Gorica, School of Environmental Science, Vipavska 13, 5000 Nova Gorica, Slovenia; University of Ljubljana, Biotechnical Faculty, Food Science and Technology Department, Chair of Biotechnology, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
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Su M, Yang Y, Yang G. Quantitative measurement of hydroxyl radical induced DNA double-strand breaks and the effect of N-acetyl-L-cysteine. FEBS Lett 2006; 580:4136-42. [PMID: 16828758 DOI: 10.1016/j.febslet.2006.06.060] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2006] [Revised: 06/15/2006] [Accepted: 06/16/2006] [Indexed: 01/09/2023]
Abstract
Reactive oxygen species, such as hydroxyl or superoxide radicals, can be generated by exogenous agents as well as from normal cellular metabolism. Those radicals are known to induce various lesions in DNA, including strand breaks and base modifications. These lesions have been implicated in a variety of diseases such as cancer, arteriosclerosis, arthritis, neurodegenerative disorders and others. To assess these oxidative DNA damages and to evaluate the effects of the antioxidant N-acetyl-L-cysteine (NAC), atomic force microscopy (AFM) was used to image DNA molecules exposed to hydroxyl radicals generated via Fenton chemistry. AFM images showed that the circular DNA molecules became linear after incubation with hydroxyl radicals, indicating the development of double-strand breaks. The occurrence of the double-strand breaks was found to depend on the concentration of the hydroxyl radicals and the duration of the reaction. Under the conditions of the experiments, NAC was found to exacerbate the free radical-induced DNA damage.
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Affiliation(s)
- Meihong Su
- Department of Physics, Drexel University, Philadelphia, PA 19104, USA
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Chen CS, Wells PG. Enhanced tumorigenesis in p53 knockout mice exposed in utero to high-dose vitamin E. Carcinogenesis 2006; 27:1358-68. [PMID: 16401638 DOI: 10.1093/carcin/bgi325] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The limited antioxidative capacity of the embryo and fetus may increase their risk for cancer initiation and/or promotion by reactive oxygen species (ROS)-mediated oxidative DNA damage and/or signaling. To determine if cancer can originate in utero, a high dietary dose of the antioxidant vitamin E (VE) (10% dl-alpha-tocopherol-acetate) was given to cancer-prone p53 knockout mice throughout pregnancy. Although reducing fetal death (P < 0.05), in utero exposure to VE enhanced postnatal tumorigenesis in both +/- (P < 0.04) and -/- (P < 0.0008) p53-deficient offspring. VE did not alter maternal weights, offspring p53 genotypic distribution or tumor spectrum. Constitutive embryonic DNA oxidation in untreated -/- p53 embryos [gestational day (GD) 13] was higher than in +/- and +/+ p53 littermates (P < 0.05). VE reduced DNA oxidation in -/- p53 embryos (P < 0.05) without affecting +/- and +/+ p53 littermates. VE had contrasting, tissue-dependent effects on fetal (GD 19) DNA oxidation, with reductions in -/- and +/- p53-deficient fetal brains (P < 0.01), increases in skin (P < 0.05) and no effect in liver and thymus. The 250-fold increase in dietary VE levels produced only 1.6-6.3-fold, tissue-dependent increases in tissue concentrations. The greatest increase, in fetal skin, correlated with increased DNA oxidation in that tissue in -/- and +/- p53-deficient fetuses and enhanced tumorigenesis in these genotypes. These results show that some cancers may originate in utero and the risk can be enhanced by embryonic and fetal exposure to high dietary levels of VE. The elevated DNA oxidation in some tissues of untreated -/- p53 offspring suggests that ROS may contribute to their higher baseline tumor incidence. The limited and tissue-dependent disposition of VE indicates substantial conceptal regulation. The similarly selective and contrasting effects of VE on DNA oxidation may contribute to its controversial protective efficacy and suggest that its effects on tumorigenesis are cell-specific, possibly in high doses involving a pro-oxidative mechanism.
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Affiliation(s)
- Connie S Chen
- Faculty of Pharmacy and Department of Pharmacology, University of Toronto, Toronto, Ontario, Canada, M5S 2S2
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50
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Hiraku Y, Murata M, Kawanishi S. Role of Oxidative DNA Damage in Dietary Carcinogenesis. Genes Environ 2006. [DOI: 10.3123/jemsge.28.127] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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