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Feng Q, Liu F, Nie J, Yang Y, Li X, Wang S. The associations between dietary flavonoids intake and risk of depressive symptom in diabetic patients: Data from NHANES 2007-2008, 2009-2010, and 2017-2018. J Affect Disord 2024; 359:226-233. [PMID: 38768822 DOI: 10.1016/j.jad.2024.05.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 05/22/2024]
Abstract
BACKGROUND The increasing incidence of depressive symptoms in diabetic patients contributes to the global burden of disease, but few epidemiological studies have evaluated the relationship between dietary flavonoids intake and depressive symptoms in diabetic patients in American adults. OBJECTIVE This study intended to evaluate the associations of dietary flavonoids intake and depressive symptoms in diabetic patients in American adults. METHODS We conducted a cross-sectional analysis of 1993 adults aged ≥20 years old who participated in the 2007-2008, 2009-2010, and 2017-2018 National Health and Nutrition Examination Surveys (NHANES). Chi-square test and independent-sample t-test were used to compare subjects' characteristics. Logistic regression model was further used to analyze the relationship between dietary flavonoid intake and depressive symptoms in diabetic patients. Restricted cubic spline (RCS) analysis was used to investigate the non-linear relationship between dietary flavonoid intake and the prevalence of depressive symptoms in diabetic patients. The weighted quartile sum (WQS) regression was used to analyze the effect of 29 flavonoids monomers. RESULTS The results showed that the total flavonoid intake in the third quartile (OR, 0.635; 95 % CI,0.419-0.962; P, 0.032) was significantly associated with a reduced risk of depressive symptoms in diabetic patients compared with the lowest quartile. And there was a U-shaped association between dietary flavonoid intake and risk of depressive symptoms in diabetic patients. Top contributors of flavonoid monomers were eriodictyol, naringenin, and theaflavin-3'-gallate, accounting for a percentage of 30.83 %, 22.17 %, and 6.92 %, respectively. CONCLUSION Moderate (56.07-207.12 mg/day) dietary flavonoid intake was associated with a reduced risk of depressive symptoms in diabetic patients. The important flavonoid monomers were eriodictyol, naringenin, and theaflavin-3'-gallate.
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Affiliation(s)
- Qianqian Feng
- School of Public Health, Wuhan University, Wuhan 430071, China
| | - Fang Liu
- School of Public Health, Wuhan University, Wuhan 430071, China
| | - Jiaqi Nie
- School of Public Health, Wuhan University, Wuhan 430071, China
| | - Yichi Yang
- School of Public Health, Wuhan University, Wuhan 430071, China
| | - Xiaosong Li
- School of Public Health, Wuhan University, Wuhan 430071, China
| | - Suqing Wang
- School of Public Health, Wuhan University, Wuhan 430071, China; School of Nursing, Wuhan University, Wuhan 430071, China; Center for Chronic Disease Rehabilitation, School of Nursing, Wuhan University, Wuhan, China.
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Rahimipour Anaraki S, Farzami P, Hosseini Nasab SS, Kousari A, Fazlollahpour Naghibi A, Shariat Zadeh M, Barati R, Taha SR, Karimian A, Nabi-Afjadi M, Yousefi B. Natural products and the balancing act of autophagy-dependent/independent ferroptosis in cancer therapy. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:2531-2549. [PMID: 37878043 DOI: 10.1007/s00210-023-02782-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/11/2023] [Indexed: 10/26/2023]
Abstract
The control of biological cell death is essential for the body's appropriate growth. The resistance of cells to the apoptotic process presents a new difficulty in the treatment of cancer. To combat cancer cells, researchers are working to find new apoptotic pathways and components to activate. One of the processes of regulated cell death (RCD) is referred to as ferroptosis marked by a decline in the activity of lipid glutathione peroxidase 4 (GPX4) after the buildup of reactive oxygen species (ROS). Since lipid peroxidation is a crucial component of ferroptosis and is required for its start, numerous medicines have been studied, particularly for the treatment of cancer. In this context, autophagy is an additional form of RCD that can govern ferroptosis through shared signaling pathways/factors involved in both mechanisms. In this review, we will explore the molecular mechanisms underlying ferroptosis and its association with autophagy, to gain fresh insights into their interplay in cancer advancement, and the potential of natural products for its treatment.
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Affiliation(s)
| | - Payam Farzami
- Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Ali Kousari
- Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Andarz Fazlollahpour Naghibi
- Infectious Diseases and Tropical Medicine Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | | | - Reza Barati
- Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Reza Taha
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Ansar Karimian
- Faculty of Medicine, Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohsen Nabi-Afjadi
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Bahman Yousefi
- Faculty of Medicine, Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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Vats S, Kondabala R, Saxena S. Identification of alpha‐Synuclein Disaggregator from
Camellia sp
. Insight of Molecular Docking and Molecular Dynamics Simulations. ChemistrySelect 2022. [DOI: 10.1002/slct.202104131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sheetal Vats
- Department of Biotechnology Thapar Institute of Engineering and Technology Patiala Punjab India- 147004
| | - Rajesh Kondabala
- School of Chemistry and Biochemistry Thapar Institute of Engineering and Technology Patiala Punjab India- 147004
| | - Sanjai Saxena
- Department of Biotechnology Thapar Institute of Engineering and Technology Patiala Punjab India- 147004
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Antibacterial and Sporicidal Activity Evaluation of Theaflavin-3,3'-digallate. Int J Mol Sci 2022; 23:ijms23042153. [PMID: 35216265 PMCID: PMC8877948 DOI: 10.3390/ijms23042153] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 02/10/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023] Open
Abstract
Theaflavin-3,3'-digallate (TFDG), a polyphenol derived from the leaves of Camellia sinensis, is known to have many health benefits. In this study, the antibacterial effect of TFDG against nine bacteria and the sporicidal activities on spore-forming Bacillus spp. have been investigated. Microplate assay, colony-forming unit, BacTiter-GloTM, and Live/Dead Assays showed that 250 µg/mL TFDG was able to inhibit bacterial growth up to 99.97%, while 625 µg/mL TFDG was able to inhibit up to 99.92% of the spores from germinating after a one-hour treatment. Binding analysis revealed the favorable binding affinity of two germination-associated proteins, GPR and Lgt (GerF), to TFDG, ranging from -7.6 to -10.3 kcal/mol. Semi-quantitative RT-PCR showed that TFDG treatment lowered the expression of gpr, ranging from 0.20 to 0.39 compared to the control in both Bacillus spp. The results suggest that TFDG not only inhibits the growth of vegetative cells but also prevents the germination of bacterial spores. This report indicates that TFDG is a promising broad-spectrum antibacterial and anti-spore agent against Gram-positive, Gram-negative, acid-fast bacteria, and endospores. The potential anti-germination mechanism has also been elucidated.
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Theaflavin-3-gallate, a natural antagonist for Hsp90: In-silico and in-vitro approach. Chem Biol Interact 2021; 353:109774. [PMID: 34958756 DOI: 10.1016/j.cbi.2021.109774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/21/2021] [Accepted: 12/07/2021] [Indexed: 11/21/2022]
Abstract
Poor prognosis and metastasis have been recognized as the major cause of breast cancer related deaths worldwide. Recent experimental evidence has shown that Hsp90, the prime chaperone, is overexpressed in many cancers and is responsible if reducing the 5-year survival rate of cancer patients. Therefore, targeted inhibition of Hsp90 may be a new and effective way to target cancer as well as enhancing therapeutic outcomes. In the present study, screening and stimulation of potential natural compounds result in the identification of theaflavin-3-gallate as a promising inhibitory compound of Hsp90. Further in-vitro validation of the cytotoxic effect of theaflavin-3-gallate in human breast carcinoma cell line MCF7 and normal cell line MCF10A revealed that theaflavin-3-gallate significantly inhibited the cell proliferation of MCF7 cells whereas no cytotoxic effect was observed on MCF10A cells. We also found that theaflavin-3-gallate significantly induced programmed cell death by arresting cells in the G2/M phase of the cell cycle. A significant decrease in cell migration and colony formation by theaflavin-3-gallate treatment was also observed in MCF7 cells. Furthermore, theaflavin-3-gallate significantly downregulated the mRNA expression patterns of the HSP90, MMP9, VEGFA, and SPP1 genes. Collectively, our results demonstrated theaflavin-3-gallate as a potential natural Hsp90 inhibitor that can be used to enhance the therapeutic efficacy of existing breast cancer therapies and improve overall survival of breast cancer patients.
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Luo T, Jiang JG. Anticancer Effects and Molecular Target of Theaflavins from Black Tea Fermentation in Vitro and in Vivo. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:15052-15065. [PMID: 34878780 DOI: 10.1021/acs.jafc.1c05313] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Black tea is one of the most popular beverages in the world, and numerous epidemiological studies have shown that drinking black tea is good for health. As a natural tea pigment formed during the fermentation of black tea, the content of theaflavins accounts for only 2-6% of the dry weight of black tea, but they have a great impact on the color and taste of black tea soup. Recently, a large number of studies have shown that theaflavins have a significant anticancer effect. In this Perspective, we first state the physical and chemical properties, separation and purification methods, and biological formation pathways of theaflavins and analyze their safety and oral bioavailability and the structure-activity relationship of their antioxidant and anticancer activities; then, we describe in detail their anticancer effect in vitro and in vivo and highlight their various molecular targets involved in cancer inhibition. The anticancer molecular targets of theaflavins are mainly cell-cycle regulatory proteins, apoptosis-related proteins, cell-migration-related proteins, and growth transcription factors. Finally, the possibility of developing new health-care food based on theaflavins is discussed. This Perspective is expected to provide a theoretical basis for the anticancer application of theaflavins in the future.
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Affiliation(s)
- Ting Luo
- College of Food and Bioengineering, South China University of Technology, Guangzhou 510640, China
| | - Jian-Guo Jiang
- College of Food and Bioengineering, South China University of Technology, Guangzhou 510640, China
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Dhahri M, Alghrably M, Mohammed HA, Badshah SL, Noreen N, Mouffouk F, Rayyan S, Qureshi KA, Mahmood D, Lachowicz JI, Jaremko M, Emwas AH. Natural Polysaccharides as Preventive and Therapeutic Horizon for Neurodegenerative Diseases. Pharmaceutics 2021; 14:1. [PMID: 35056897 PMCID: PMC8777698 DOI: 10.3390/pharmaceutics14010001] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/27/2021] [Accepted: 12/03/2021] [Indexed: 01/06/2023] Open
Abstract
Neurodegenerative diseases are a serious and widespread global public health burden amongst aging populations. The total estimated worldwide global cost of dementia was US$818 billion in 2015 and has been projected to rise to 2 trillion US$ by 2030. While advances have been made to understand different neurodegenerative disease mechanisms, effective therapeutic strategies do not generally exist. Several drugs have been proposed in the last two decades for the treatment of different types of neurodegenerative diseases, with little therapeutic benefit, and often with severe adverse and side effects. Thus, the search for novel drugs with higher efficacy and fewer drawbacks is an ongoing challenge in the treatment of neurodegenerative disease. Several natural compounds including polysaccharides have demonstrated neuroprotective and even therapeutic effects. Natural polysaccharides are widely distributed in plants, animals, algae, bacterial and fungal species, and have received considerable attention for their wide-ranging bioactivity, including their antioxidant, anti-neuroinflammatory, anticholinesterase and anti-amyloidogenic effects. In this review, we summarize different mechanisms involved in neurodegenerative diseases and the neuroprotective effects of natural polysaccharides, highlighting their potential role in the prevention and therapy of neurodegenerative disease.
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Affiliation(s)
- Manel Dhahri
- Biology Department, Faculty of Science Yanbu, Taibah University, Yanbu El-Bahr 46423, Saudi Arabia;
| | - Mawadda Alghrably
- Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia; (M.A.); (M.J.)
| | - Hamdoon A. Mohammed
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraydah 51452, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University, Cairo 11371, Egypt
| | - Syed Lal Badshah
- Department of Chemistry, Islamia College University, Peshawar 25120, Pakistan; (S.L.B.); (N.N.)
| | - Noreen Noreen
- Department of Chemistry, Islamia College University, Peshawar 25120, Pakistan; (S.L.B.); (N.N.)
| | - Fouzi Mouffouk
- Department of Chemistry, Faculty of Science, Kuwait University, Safat 13060, Kuwait;
| | - Saleh Rayyan
- Chemistry Department, Birzeit University, Birzeit P627, Palestine;
| | - Kamal A. Qureshi
- Department of Pharmaceutics, Unaizah College of Pharmacy, Qassim University, Unaizah 51911, Saudi Arabia;
| | - Danish Mahmood
- Department of Pharmacology and Toxicology, Unaizah College of Pharmacy, Qassim University, Unaizah 51911, Saudi Arabia;
| | - Joanna Izabela Lachowicz
- Department of Medical Sciences and Public Health, Università di Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy
| | - Mariusz Jaremko
- Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia; (M.A.); (M.J.)
| | - Abdul-Hamid Emwas
- Core Labs, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
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8
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Wu Z, Zhong M, Liu Y, Xiong Y, Gao Z, Ma J, Zhuang G, Hong X. Application of natural products for inducing ferroptosis in tumor cells. Biotechnol Appl Biochem 2021; 69:190-197. [PMID: 33393679 DOI: 10.1002/bab.2096] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 12/25/2020] [Indexed: 01/17/2023]
Abstract
Ferroptosis is a regulated cell death pathway based on the deposition of lipid-based reactive oxygen species (L-ROS) in the presence of iron ions. The term was first coined in 2012 by Dixon. Decreased glutathione (GSH) synthesis and low glutathione-dependent antioxidant peroxidase 4 (GPX4) activity are the major causes of ferroptosis. Sensitivity to ferroptosis for example in tumor cells may be further enhanced by high cellular iron concentrations and/or high p53 levels. Therefore, driving ferroptosis in tumor cells could be a new way to treat tumors. Thus far, natural products have played considerable roles in antitumor research and treatment, and some drugs, such as paclitaxel, have proven beneficial in many cancer patients. According to current research, natural products can induce ferroptosis when used alone or in conjunction with other cancer therapies. This review mainly elaborates the main mechanism of ferroptosis and the regulating effects of some natural products on ferroptosis, aiming to create a new space for the research and development of novel anticancer drugs.
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Affiliation(s)
- Zhengxin Wu
- School of Medicine, Guangxi University, Nanning, People's Republic of China
| | - Mengya Zhong
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, People's Republic of China.,Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen, People's Republic of China
| | - Yu Liu
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, People's Republic of China.,Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen, People's Republic of China
| | - Yubo Xiong
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, People's Republic of China.,Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen, People's Republic of China
| | - Zhi Gao
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Medical University, Nanning, People's Republic of China
| | - Jingsong Ma
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, People's Republic of China.,Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen, People's Republic of China
| | - Guohong Zhuang
- Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, School of Medicine, Organ Transplantation Institute of Xiamen University, Xiamen University, Xiamen, People's Republic of China
| | - Xuehui Hong
- Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, People's Republic of China.,Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen, People's Republic of China
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Truzzi F, Valerii MC, Tibaldi C, Zhang Y, Abduazizova V, Spisni E, Dinelli G. Are Supplements Safe? Effects of Gallic and Ferulic Acids on In Vitro Cell Models. Nutrients 2020; 12:nu12061591. [PMID: 32485864 PMCID: PMC7352663 DOI: 10.3390/nu12061591] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 05/17/2020] [Accepted: 05/27/2020] [Indexed: 12/12/2022] Open
Abstract
Polyphenols display health-promoting properties linked to their biological activities. They are initially absorbed in the small intestine, then they are largely metabolized in the colon, whereupon they are able to exert systemic effects. The health-promoting properties of polyphenols have led to the development of food supplements, which are also largely consumed by healthy people, even if data on their safety are still yet lacking. In the present paper, the content of gallic acid and ferulic acid was analyzed in two supplements, and shown to be higher than the relative contents found in fruit and flour. To evaluate the effects of these phenolic compounds on epithelial intestinal tissue, gallic and ferulic acids were added to a new in vitro model of the intestinal wall at different concentrations. The effects on viability, proliferation and migration of these compounds were respectively tested on three different cell lines (Caco2, L929 and U937), as well as on a tridimensional intestinal model, composed of a mucosal layer and a submucosa with fibroblasts and monocytes. Results indicated that gallic and ferulic acids can exert toxic effects on in vitro cell models at high concentrations, suggesting that an excessive and uncontrolled consumption of polyphenols may induce negative effects on the intestinal wall.
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Affiliation(s)
- Francesca Truzzi
- Department of Agricultural and Food Sciences, Alma Mater Studiorum–University of Bologna, 40127 Bologna, Italy; (F.T.); (C.T.); (Y.Z.); (V.A.)
| | - Maria Chiara Valerii
- Department of Biological, Geological, and Environmental Sciences, Alma Mater Studiorum–University of Bologna, 40126 Bologna, Italy; (M.C.V.); (E.S.)
| | - Camilla Tibaldi
- Department of Agricultural and Food Sciences, Alma Mater Studiorum–University of Bologna, 40127 Bologna, Italy; (F.T.); (C.T.); (Y.Z.); (V.A.)
| | - Yanxin Zhang
- Department of Agricultural and Food Sciences, Alma Mater Studiorum–University of Bologna, 40127 Bologna, Italy; (F.T.); (C.T.); (Y.Z.); (V.A.)
| | - Veronika Abduazizova
- Department of Agricultural and Food Sciences, Alma Mater Studiorum–University of Bologna, 40127 Bologna, Italy; (F.T.); (C.T.); (Y.Z.); (V.A.)
| | - Enzo Spisni
- Department of Biological, Geological, and Environmental Sciences, Alma Mater Studiorum–University of Bologna, 40126 Bologna, Italy; (M.C.V.); (E.S.)
| | - Giovanni Dinelli
- Department of Agricultural and Food Sciences, Alma Mater Studiorum–University of Bologna, 40127 Bologna, Italy; (F.T.); (C.T.); (Y.Z.); (V.A.)
- Correspondence: ; Tel.: +39-051-2096674
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Stevens JF, Revel JS, Maier CS. Mitochondria-Centric Review of Polyphenol Bioactivity in Cancer Models. Antioxid Redox Signal 2018; 29:1589-1611. [PMID: 29084444 PMCID: PMC6207154 DOI: 10.1089/ars.2017.7404] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 10/28/2017] [Indexed: 12/17/2022]
Abstract
SIGNIFICANCE Humans are exposed daily to polyphenols in milligram-to-gram amounts through dietary consumption of fruits and vegetables. Polyphenols are also available as components of dietary supplements for improving general health. Although polyphenols are often advertised as antioxidants to explain health benefits, experimental evidence shows that their beneficial cancer preventing and controlling properties are more likely due to stimulation of pro-oxidant and proapoptotic pathways. Recent Advances: The understanding of the biological differences between cancer and normal cell, and especially the role that mitochondria play in carcinogenesis, has greatly advanced in recent years. These advances have resulted in a wealth of new information on polyphenol bioactivity in cell culture and animal models of cancer. Polyphenols appear to target oxidative phosphorylation and regulation of the mitochondrial membrane potential (MMP), glycolysis, pro-oxidant pathways, and antioxidant (adaptive) stress responses with greater selectivity in tumorigenic cells. CRITICAL ISSUES The ability of polyphenols to dissipate the MMP (Δψm) by a protonophore mechanism has been known for more than 50 years. However, researchers focus primarily on the downstream molecular effects of Δψm dissipation and mitochondrial uncoupling. We argue that the physicochemical properties of polyphenols are responsible for their anticancer properties by virtue of their protonophoric and pro-oxidant properties rather than their specific effects on downstream molecular targets. FUTURE DIRECTIONS Polyphenol-induced dissipation of Δψm is a physicochemical process that cancer cells cannot develop resistance against by gene mutation. Therefore, polyphenols should receive more attention as agents for cotherapy with cancer drugs to gain synergistic activity. Antioxid. Redox Signal.
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Affiliation(s)
- Jan F. Stevens
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon
| | - Johana S. Revel
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon
- Department of Chemistry, Oregon State University, Corvallis, Oregon
| | - Claudia S. Maier
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon
- Department of Chemistry, Oregon State University, Corvallis, Oregon
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12
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Pan H, Kim E, Rankin GO, Rojanasakul Y, Tu Y, Chen YC. Theaflavin-3,3'-Digallate Enhances the Inhibitory Effect of Cisplatin by Regulating the Copper Transporter 1 and Glutathione in Human Ovarian Cancer Cells. Int J Mol Sci 2018; 19:E117. [PMID: 29301278 PMCID: PMC5796066 DOI: 10.3390/ijms19010117] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 12/24/2017] [Accepted: 12/29/2017] [Indexed: 12/31/2022] Open
Abstract
Ovarian cancer has the highest fatality rate among the gynecologic cancers. The side effects, high relapse rate, and drug resistance lead to low long-term survival rate (less than 40%) of patients with advanced ovarian cancer. Theaflavin-3,3'-digallate (TF3), a black tea polyphenol, showed less cytotoxicity to normal ovarian cells than ovarian cancer cells. We aimed to investigate whether TF3 could potentiate the inhibitory effect of cisplatin against human ovarian cancer cell lines. In the present study, combined treatment with TF3 and cisplatin showed a synergistic cytotoxicity against A2780/CP70 and OVCAR3 cells. Treatment with TF3 could increase the intracellular accumulation of platinum (Pt) and DNA-Pt adducts and enhanced DNA damage induced by cisplatin in both cells. Treatment with TF3 decreased the glutathione (GSH) levels and upregulated the protein levels of the copper transporter 1 (CTR1) in both cells, which led to the enhanced sensitivity of both ovarian cancer cells to cisplatin. The results imply that TF3 might be used as an adjuvant to potentiate the inhibitory effect of cisplatin against advanced ovarian cancer.
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Affiliation(s)
- Haibo Pan
- Department of Tea Science, Zhejiang University, Hangzhou 310058, China.
- College of Science, Technology and Mathematics, Alderson Broaddus University, Philippi, WV 26416, USA.
| | - Eunhye Kim
- Department of Tea Science, Zhejiang University, Hangzhou 310058, China.
| | - Gary O Rankin
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA.
| | - Yon Rojanasakul
- Department of Pharmaceutical Sciences, West Virginia University, Morgantown, WV 26506, USA.
| | - Youying Tu
- Department of Tea Science, Zhejiang University, Hangzhou 310058, China.
| | - Yi Charlie Chen
- College of Science, Technology and Mathematics, Alderson Broaddus University, Philippi, WV 26416, USA.
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Goszcz K, Duthie GG, Stewart D, Leslie SJ, Megson IL. Bioactive polyphenols and cardiovascular disease: chemical antagonists, pharmacological agents or xenobiotics that drive an adaptive response? Br J Pharmacol 2017; 174:1209-1225. [PMID: 28071785 PMCID: PMC5429332 DOI: 10.1111/bph.13708] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 12/19/2016] [Accepted: 01/05/2017] [Indexed: 12/12/2022] Open
Abstract
Polyphenols are widely regarded to have a wide range of health-promoting qualities, including beneficial effects on cardiovascular disease. Historically, the benefits have been linked to their well-recognized powerful antioxidant activity. However, the concept that the beneficial effects are attributable to direct antioxidant activity in vivo does not pay sufficient heed to the fact that polyphenols degrade rapidly, are poorly absorbed and rapidly metabolized, resulting in very low bioavailability. This review explores alternative mechanisms by which polyphenols, or their metabolites, exert biological activity via mechanisms that can be activated by physiologically relevant concentrations. Evidence is presented to support the action of phenolic derivatives on receptors and signalling pathways to induce adaptive responses that drive changes in endogenous antioxidant, antiplatelet, vasodilatory and anti-inflammatory effects. The implications are that in vitro antioxidant measures as predictors of polyphenol protective activity in vivo hold little relevance and that closer attention needs to be paid to bioavailable metabolites to understand the mode of action of these diet-derived components. LINKED ARTICLES This article is part of a themed section on Principles of Pharmacological Research of Nutraceuticals. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.11/issuetoc.
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Affiliation(s)
- Katarzyna Goszcz
- Department of Diabetes and Cardiovascular ScienceUniversity of the Highlands and Islands, Centre for Health ScienceInvernessUK
| | - Garry G Duthie
- Rowett Institute of Nutrition and HealthUniversity of AberdeenAberdeenUK
| | - Derek Stewart
- The James Hutton InstituteDundeeUK
- School of Engineering and Physical SciencesHeriot‐Watt UniversityEdinburghUK
| | - Stephen J Leslie
- Department of Diabetes and Cardiovascular ScienceUniversity of the Highlands and Islands, Centre for Health ScienceInvernessUK
- Cardiology UnitRaigmore HospitalInvernessUK
| | - Ian L Megson
- Department of Diabetes and Cardiovascular ScienceUniversity of the Highlands and Islands, Centre for Health ScienceInvernessUK
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Narai-Kanayama A, Kawashima A, Uchida Y, Kawamura M, Nakayama T. Specificity of tyrosinase-catalyzed synthesis of theaflavins. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2017.03.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Zhao YN, Gu J, Jia S, Guan Y, Zhang Y. Zero-order release of polyphenolic drugs from dynamic, hydrogen-bonded LBL films. SOFT MATTER 2016; 12:1085-1092. [PMID: 26577014 DOI: 10.1039/c5sm02186c] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Drug carriers capable of releasing drugs at a constant rate, or following zero-order kinetics, can lead to the best control of plasma drug concentration. Here we demonstrated that zero-order release of polyphenolic drugs, including tannic acid, epigallocatechin gallate, proanthocyanidins, and theaflavin-3'-gallate, could be achieved using hydrogen-bonded layer-by-layer films as the drug carrier. The films were fabricated using the polyphenolic drugs as hydrogen donors and polyethylene glycol (PEG) as the hydrogen acceptor. Because the drugs and PEG are bonded with reversible, dynamic hydrogen bonds, the films disintegrate gradually in aqueous solutions, and thus release the drugs into the media. Furthermore, because the PEG polymers have a narrow molecular weight distribution, the films disintegrate and release the polyphenolic drugs at a constant rate. Besides allowing for zero-order release, the drug carrier developed here also provides various ways to tune the drug release rate. The drug release rate increases with decreasing molecular weight of PEG. More importantly, the release rate could be tuned using external stimuli. Increasing the pH or temperature results in accelerated drug release, while the addition of salt retards the drug release.
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Affiliation(s)
- Ya-Nan Zhao
- State Key Laboratory of Medicinal Chemical Biology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| | - Jianjun Gu
- State Key Laboratory of Medicinal Chemical Biology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| | - Siyu Jia
- State Key Laboratory of Medicinal Chemical Biology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| | - Ying Guan
- State Key Laboratory of Medicinal Chemical Biology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
| | - Yongjun Zhang
- State Key Laboratory of Medicinal Chemical Biology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
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de Oliveira MR. Phloretin-induced cytoprotective effects on mammalian cells: A mechanistic view and future directions. Biofactors 2016; 42:13-40. [PMID: 26826024 DOI: 10.1002/biof.1256] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 11/19/2015] [Indexed: 11/11/2022]
Abstract
Phloretin (C15 H14 O5 ), a dihydrochalcone flavonoid, is mainly found in fruit, leaves, and roots of apple tree. Phloretin exerts antioxidant, anti-inflammatory, and anti-tumor activities in mammalian cells through mechanisms that have been partially elucidated throughout the years. Phloretin bioavailability is well known in humans, but still remains to be better studied in experimental animals, such as mouse and rat. The focus of the present review is to gather information regarding the mechanisms involved in the phloretin-elicited effects in different in vitro and in vivo experimental models. Several manuscripts were analyzed and data raised by authors were described and discussed here in a mechanistic manner. Comparisons between the effects elicited by phloretin and phloridzin were made whenever possible, as well as with other polyphenols, clarifying questions about the use of phloretin as a potential therapeutic agent. Toxicological aspects associated to phloretin exposure were also discussed here. Furthermore, a special section containing future directions was created as a suggestive guide towards the elucidation of phloretin-related actions in mammalian cells and tissues.
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Affiliation(s)
- Marcos Roberto de Oliveira
- Department of Chemistry/ICET, Postgraduate Program in Chemistry (PPGQ), Federal University of Mato Grosso (UFMT), CEP, Cuiaba, MT, Brazil
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Gorlach S, Fichna J, Lewandowska U. Polyphenols as mitochondria-targeted anticancer drugs. Cancer Lett 2015; 366:141-9. [PMID: 26185003 DOI: 10.1016/j.canlet.2015.07.004] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 07/01/2015] [Accepted: 07/03/2015] [Indexed: 01/02/2023]
Abstract
Mitochondria are the respiratory and energetic centers of the cell where multiple intra- and extracellular signal transduction pathways converge leading to dysfunction of those organelles and, consequently, apoptotic or/and necrotic cell death. Mitochondria-targeted anticancer drugs are referred to as mitocans; they have recently been classified by Neuzil et al. (2013) according to their molecular mode of action into: hexokinase inhibitors; mimickers of the Bcl-2 homology-3 (BH3) domains; thiol redox inhibitors; deregulators of voltage-dependent anionic channel (VDAC)/adenine nucleotide translocase (ANT) complex; electron redox chain-targeting agents; lipophilic cations targeting the mitochondrial inner membrane; tricarboxylic acid cycle-targeting agents; and mitochondrial DNA-targeting agents. Polyphenols of plant origin and their synthetic or semisynthetic derivatives exhibit pleiotropic biological activities, including the above-mentioned modes of action characteristic of mitocans. Some of them have already been tested in clinical trials. Gossypol has served as a lead compound for developing more efficient BH3 mimetics such as ABT-737 and its orally available structural analog ABT-263 (Navitoclax). Furthermore, mitochondriotropic derivatives of phenolic compounds such as quercetin and resveratrol have been synthesized and reported to efficiently induce cancer cell death in vitro.
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Affiliation(s)
- Sylwia Gorlach
- Department of Biochemistry, Medical University of Lodz, Lodz, Poland
| | - Jakub Fichna
- Department of Biochemistry, Medical University of Lodz, Lodz, Poland
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Protection of dietary polyphenols against oral cancer. Nutrients 2013; 5:2173-91. [PMID: 23771133 PMCID: PMC3725499 DOI: 10.3390/nu5062173] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 04/24/2013] [Accepted: 05/28/2013] [Indexed: 12/22/2022] Open
Abstract
Oral cancer represents a health burden worldwide with approximate 275,000 new cases diagnosed annually. Its poor prognosis is due to local tumor invasion and frequent lymph node metastasis. Better understanding and development of novel treatments and chemo-preventive approaches for the preventive and therapeutic intervention of this type of cancer are necessary. Recent development of dietary polyphenols as cancer preventives and therapeutic agents is of great interest due to their antioxidant and anti-carcinogenic activities. Polyphenols may inhibit carcinogenesis in the stage of initiation, promotion, or progression. In particular, dietary polyphenols decrease incidence of carcinomas and exert protection against oral cancer by induction of cell death and inhibition of tumor growth, invasion, and metastasis. In this review, we discuss current progress of dietary polyphenols against oral cancers in vitro, in vivo, and at population levels.
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Sun S, Pan S, Miao A, Ling C, Pang S, Tang J, Chen D, Zhao C. Active extracts of black tea (Camellia Sinensis) induce apoptosis of PC-3 prostate cancer cells via mitochondrial dysfunction. Oncol Rep 2013; 30:763-72. [PMID: 23715786 DOI: 10.3892/or.2013.2504] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 05/07/2013] [Indexed: 11/06/2022] Open
Abstract
Cancer of the prostate gland is the most common invasive malignancy and the second leading cause of cancer-related death in human males. Many studies have shown that black tea reduces the risk of several types of cancer. We studied the effects of active extracts of black tea and the black tea polyphenols theaflavins (TFs), on the cellular proliferation and mitochondria of the human prostate cancer cell line PC-3. Our studies revealed that Yinghong black tea extracts (YBT), Assam black tea extracts (ABT) and TFs inhibited cell proliferation in a dose-dependent manner. We also showed that TFs, YBT and ABT affected the morphology of PC-3 cells and induced apoptosis or even necrosis in PC-3 cells. In addition, it was observed that the samples significantly caused loss of the mitochondrial membrane potential, release of cytochrome c from the intermembrane space into the cytosol, decrease of the ATP content and activation of caspase-3 compared with the control. Taken together, these findings suggest that black tea could act as an effective anti-proliferative agent in PC-3 cells, and TFs, YBT and ABT induced apoptosis of PC-3 cells through mitochondrial dysfunction.
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Affiliation(s)
- Shili Sun
- Drink Plant Research Institute/Tea Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong 510640, PR China
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20
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Amarasinghe HK, Usgodaarachchi U, Kumaraarachchi M, Johnson NW, Warnakulasuriya S. Diet and risk of oral potentially malignant disorders in rural Sri Lanka. J Oral Pathol Med 2013; 42:656-62. [PMID: 23601045 DOI: 10.1111/jop.12067] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2013] [Indexed: 12/14/2022]
Abstract
BACKGROUND While the protective role of antioxidant nutrients against cancer is well established, data on Asian diets in patients with oral cancer are meagre. METHODS A total of 1029 subjects over 30 years of age were investigated on their dietary practices in the Sabaragamuwa province (Sri Lanka) in 2006-07. Data collection tools were an interviewer-administered questionnaire, a three-day food diary and an examination of the oral cavity. Subjects identified with Oral Potentially Malignant Disorders (OPMD) and disease-free controls were analysed in a case-control fashion. Among the OPMDs, those with leukoplakia were separately considered. A further subgroup analysis was undertaken for β-carotene-rich foods. The analysis was stratified by portions of fruit/vegetables consumed as five or more portions and two or more portions daily. RESULTS A low BMI (<18.5) was a significant independent risk factor for the development of OPMD. More than half of both cases and controls consumed less than two portions of fruit/vegetables per day and only 20 subjects consumed more than five portions per day. Intake of more than two portions per day of β-carotene-containing fruits/vegetables significantly reduced the risk of having an OPMD and leukoplakia (OR = 0.5; 95% CI, 0.3-0.9). The significant differences observed with BMI and fruits/vegetables were attenuated when adjusted for betel quid chewing, smoking and alcohol use. CONCLUSIONS This study discloses prevailing under-nutrition in this rural population with very low daily consumption of fruit/vegetables. Cancer preventive properties in their diets are limited and are swamped by the known carcinogenic agents associated with use of betel quid, tobacco and alcohol.
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Dadkhah A, Fatemi F, Ashrafihelan J. Investigation of STW 5 (Iberogast®) preventive effects in experimental sepsis. PHARMACEUTICAL BIOLOGY 2013; 51:474-481. [PMID: 23336345 DOI: 10.3109/13880209.2012.740487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
CONTEXT STW 5 (Iberogast(®)) is a well known herbal combination drug containing glycosides and flavonoids for which multiple pharmacological properties have been shown. OBJECTIVE In this study, attempts were made to assess whether STW 5, an aqueous ethanol solution, has a preventive effect against liver and lung pathological damage in rats after experimental induction of sepsis [cecal ligation and puncture (CLP)]. MATERIALS AND METHODS Experimental sepsis was induced in rats using CLP operation. The rats (n = 36) were divided into six groups (six/group): Sham-operated (SOP); CLP; CLP + STW 5 (2.5, 5 and 10 mg/kg) and CLP + indomethacin. The drugs were injected intraperitoneally immediately after sepsis induction. RESULTS It was found that induction of sepsis 24 h after CLP was associated with significant liver and lung damage, also remaining after STW 5 administration. DISCUSSION AND CONCLUSION It appears that STW 5, which has a pronounced efficacy in functional gastro-intestinal diseases, has no effect on septic liver and lung damage in the CLP rat model.
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Affiliation(s)
- A Dadkhah
- Faculty of Medicine, Qom Branch, Islamic Azad University, Qom, Iran.
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Alotaibi A, Bhatnagar P, Najafzadeh M, Gupta KC, Anderson D. Tea phenols in bulk and nanoparticle form modify DNA damage in human lymphocytes from colon cancer patients and healthy individuals treated in vitro with platinum-based chemotherapeutic drugs. Nanomedicine (Lond) 2012; 8:389-401. [PMID: 22943128 DOI: 10.2217/nnm.12.126] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Tea catechin epigallocatechin-3-gallate (EGCG) and other polyphenols, such as theaflavins (TFs), are increasingly proving useful as chemopreventives in a number of human cancers. They can also affect normal cells. The polyphenols in tea are known to have antioxidant properties that can quench free radical species, and pro-oxidant activities that appear to be responsible for the induction of apoptosis in tumor cells. The bioavailability of these natural compounds is an important factor that determines their efficacy. Nanoparticle (NP)-mediated delivery techniques of EGCG and TFs have been found to improve their bioavailability to a level that could benefit their effectiveness as chemopreventives. AIM The present study was conducted to compare the effects of TFs and EGCG, when used in the bulk form and in the polymer (poly[lactic-co-glycolic acid])-based NP form, in oxaliplatin- and satraplatin-treated lymphocytes as surrogate cells from colorectal cancer patients and healthy volunteers. MATERIALS & METHODS NPs were examined for their size distribution, surface morphology, entrapment efficiency and release profile. Lymphocytes were treated in the Comet assay with oxaliplatin and satraplatin, washed and treated with bulk or NP forms of tea phenols, washed and then treated with hydrogen peroxide to determine single-strand breaks after crosslinking. RESULTS The results of DNA damage measurements by the Comet assay revealed opposite trends in bulk and NP forms of TFs, as well as EGCG. Both the compounds in the bulk form produced statistically significant concentration-dependent reductions in DNA damage in oxaliplatin- or satraplatin-treated lymphocytes. In contrast, when used in the NP form both TFs and EGCG, although initially causing a reduction, produced a concentration-dependent statistically significant increase in DNA damage in the lymphocytes. DISCUSSION These observations support the notion that TFs and EGCG act as both antioxidants and pro-oxidants, depending on the form in which they are administered under the conditions of investigation.
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Affiliation(s)
- Amal Alotaibi
- Division of Medical Sciences, University of Bradford, Richmond Road, Bradford, West Yorkshire, BD7 1DP, UK
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Babich H, Ickow IM, Weisburg JH, Zuckerbraun HL, Schuck AG. Cranberry Juice Extract, A Mild Prooxidant with Cytotoxic Properties Independent of Reactive Oxygen Species. Phytother Res 2012; 26:1358-65. [DOI: 10.1002/ptr.3735] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 11/14/2011] [Accepted: 11/17/2011] [Indexed: 12/26/2022]
Affiliation(s)
- H. Babich
- Department of Biology; Stern College for Women; 245 Lexington Avenue; New York; NY; 10016; USA
| | - I. M. Ickow
- Department of Biology; Stern College for Women; 245 Lexington Avenue; New York; NY; 10016; USA
| | - J. H. Weisburg
- Department of Biology; Stern College for Women; 245 Lexington Avenue; New York; NY; 10016; USA
| | - H. L. Zuckerbraun
- Department of Biology; Stern College for Women; 245 Lexington Avenue; New York; NY; 10016; USA
| | - A. G. Schuck
- Department of Biology; Stern College for Women; 245 Lexington Avenue; New York; NY; 10016; USA
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Luo Z, Zhao Y, Wang Y, Yang X, Zhao B. Protective effect of theaflavins on neuron against 6-hydroxydopamine-induced apoptosis in SH-SY5Y cells. J Clin Biochem Nutr 2011; 50:133-8. [PMID: 22448094 PMCID: PMC3303475 DOI: 10.3164/jcbn.11-28] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Accepted: 05/21/2011] [Indexed: 01/08/2023] Open
Abstract
Theaflavins, the oxidation products of tea polyphenols are important biologically active components of black tea. 6-hydroxydopamine is a pro-parkinsonian neurotoxin. Theaflavins could inhibit the auto-oxidation of 6-hydroxydopamine in a dose-dependent manner from 0.5 µg/ml to 25 µg/ml. Here we investigated the protective effect of theaflavins on 6-hydroxydopamine induced SH-SY5Y cells against apoptosis (within this concentration range). It was found that pretreating SH-SY5Y cells with 0.5 µg/ml of theaflavins prevented 6-hydroxydopamine-induced loss of cell viability, condensed nuclear morphology, attenuated 6-hydroxydopamine-induced apoptosis, decrease of mitochondrial membrane potential and the increase of intracellular nitric oxide levels. Our results indicated that theaflavins had protective effect against 6-hydroxydopamine induced apoptosis at low concentrations, possibly through inhibition of reactive oxygen species and nitric oxide production.
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Affiliation(s)
- Zihua Luo
- Zhejiang University Tea Research Institute, 268 Kaixuan Road, Hangzhou 310029, P.R. China
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Dadkhah A, Fatemi F. Heart and kidney oxidative stress status in septic rats treated with caraway extracts. PHARMACEUTICAL BIOLOGY 2011; 49:679-86. [PMID: 21517705 DOI: 10.3109/13880209.2010.539618] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
CONTEXT Carum carvi L., (Umbelliferae) known as caraway, is a famous traditional herbal plant supposed to contain active components with pharmacological properties. OBJECTIVE In this study, the effects of caraway extracts on preventing sepsis induced by oxidative tissue injuries have been investigated by measuring heart and kidney oxidative stress parameters. MATERIALS AND METHODS Sepsis was induced in rats (n = 6) by experimental cecal ligation and puncture (CLP) model. Then, either hydroalcoholic extract or essential oils (50 and 100 mg/kg body weight) were injected intraperitonially immediately after CLP operation. Twenty-four hours after CLP, the rats were anesthetized when kidney and heart tissues were removed to analyze the tissue oxidative stress parameters, that is, glutathione (GSH) and lipid peroxidation (LP). RESULTS Sepsis induction caused a significant increase in kidney but not heart LP, indicating that kidney was more affected by sepsis induction than heart. Kidney LP and plasma urea/creatinine ratio levels were readily reversed in rats treated with essential oils but not in those treated with hydroalcoholic extract. Unlike LP, the heart and kidney GSH levels were not affected in all treated groups. DISCUSSION AND CONCLUSION Our data imply that caraway oils probably have a protective role in kidney tissue against oxidative injury in advanced stages of sepsis.
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Affiliation(s)
- Abolfazl Dadkhah
- Department of Medicine, Faculty of Medicine, Qom Branch, Islamic Azad University, P.O. Box 37185/364, Qom, Iran
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Research strategies in the study of the pro-oxidant nature of polyphenol nutraceuticals. J Toxicol 2011; 2011:467305. [PMID: 21776260 PMCID: PMC3135211 DOI: 10.1155/2011/467305] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Accepted: 04/12/2011] [Indexed: 12/13/2022] Open
Abstract
Polyphenols of phytochemicals are thought to exhibit chemopreventive effects against cancer. These plant-derived antioxidant polyphenols have a dual nature, also acting as pro-oxidants, generating reactive oxygen species (ROS), and causing oxidative stress. When studying the overall cytotoxicity of polyphenols, research strategies need to distinguish the cytotoxic component derived from the polyphenol per se from that derived from the generated ROS. Such strategies include (a) identifying hallmarks of oxidative damage, such as depletion of intracellular glutathione and lipid peroxidation, (b) classical manipulations, such as polyphenol exposures in the absence and presence of antioxidant enzymes (i.e., catalase and superoxide dismutase) and of antioxidants (e.g., glutathione and N-acetylcysteine) and cotreatments with glutathione depleters, and (c) more recent manipulations, such as divalent cobalt and pyruvate to scavenge ROS. Attention also must be directed to the influence of iron and copper ions and to the level of polyphenols, which mediate oxidative stress.
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Augustyniak A, Bartosz G, Čipak A, Duburs G, Horáková L, Łuczaj W, Majekova M, Odysseos AD, Rackova L, Skrzydlewska E, Stefek M, Štrosová M, Tirzitis G, Venskutonis PR, Viskupicova J, Vraka PS, Žarković N. Natural and synthetic antioxidants: An updated overview. Free Radic Res 2010; 44:1216-62. [DOI: 10.3109/10715762.2010.508495] [Citation(s) in RCA: 177] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Babich H, Ackerman NJ, Burekhovich F, Zuckerbraun HL, Schuck AG. Gingko biloba leaf extract induces oxidative stress in carcinoma HSC-2 cells. Toxicol In Vitro 2009; 23:992-9. [DOI: 10.1016/j.tiv.2009.06.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2009] [Revised: 05/21/2009] [Accepted: 06/23/2009] [Indexed: 12/01/2022]
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Babich H, Liebling EJ, Burger RF, Zuckerbraun HL, Schuck AG. Choice of DMEM, formulated with or without pyruvate, plays an important role in assessing the in vitro cytotoxicity of oxidants and prooxidant nutraceuticals. In Vitro Cell Dev Biol Anim 2009; 45:226-33. [DOI: 10.1007/s11626-008-9168-z] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2008] [Accepted: 12/16/2008] [Indexed: 01/23/2023]
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