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Shahi A, Koyyala VPB, Rathaur ES, Biddut MA, Hossain A, Hasan MK, Alam J, Hossain T, Khatun N. Association between Gastric Cancer with Behavioral and Dietary Factors: A Hospital Based Case-Control Study in South Asia. ASIAN JOURNAL OF ONCOLOGY 2021. [DOI: 10.1055/s-0041-1740106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Abstract
Background Gastric cancer (GC) is one of the most common malignancies and a leading cause of mortality and morbidity worldwide. It is the fourth leading cancer in Bangladesh. Identification of risk factors, effective prevention, and early diagnosis are the most important interventions against GC.
Objectives To find an association of dietary and behavioral factors in the development of GC among the Bangladeshi population.
Methods This case–control study was conducted from January 2017 to December 2018 at the National Institute of Cancer Research and Hospital, Dhaka, Bangladesh. A total of 178 patients were studied (89 case and 89 controls). Data were collected via face-to-face interview using a standard structured questionnaire, posing questions about socio-demographic, behavioral and dietary habits, and clinical factors. A binary logistic regression method was used to calculate the odds ratio (OR).
Results Among 178 patients, the age group ranged from 30 to 80 years and most patients were between 51 to 60 years. The results showed that regular consumption of red meat, duration of smoking, smokeless tobacco, fast food and fatty food, and family history of any type of cancer were directly associated with the risk of GC. On the contrary, a habit of regular walking and playing sports has an inverse association with GC. Adjusted OR shows regular consumption of red meat has 2.6 times more risk (OR = 2.661) of developing GC compared with irregular meat consumption, and a person with a history of Helicobacter pylori infection is 53% (OR = 7.263; 95% confidence interval: 3.614–14.597) more likely to develop cancer. In contrast, people who were doing exercise regularly for at least 30 minutes/day are 62.7% (OR = 0.373) less likely to develop GC than those who did not.
Conclusion The study showed an association of some dietary and behavioral factor in the development of GC. However, more research in this field is required to understand the etiology, for the development of suitable screening test, for demarcation of high-risk population, and to develop and evaluate the effectiveness of primary prevention programs.
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Affiliation(s)
- Arun Shahi
- Medical Oncology Unit, Faculty of Internal Medicine, Patan Academy of Health Science, Lalitpur, Nepal
| | | | - Ela Singh Rathaur
- Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Thailand
| | - Md. Assaduzaman Biddut
- Department of Medical Oncology, National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | - Anwor Hossain
- Department of Medical Oncology, National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | - Md. Kamrul Hasan
- Department of Medical Oncology, National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | - Jahangir Alam
- Department of Medical Oncology, National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | - Tanzina Hossain
- Department of Medical Oncology, National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | - Nazrina Khatun
- Department of Medical Oncology, National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
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Rahmani F, Gandomi H, Noori N, Faraki A, Farzaneh M. Microbial, physiochemical and functional properties of probiotic yogurt containing Lactobacillus acidophilus and Bifidobacterium bifidum enriched by green tea aqueous extract. Food Sci Nutr 2021; 9:5536-5545. [PMID: 34646523 PMCID: PMC8498050 DOI: 10.1002/fsn3.2512] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/19/2021] [Accepted: 07/25/2021] [Indexed: 12/30/2022] Open
Abstract
In this study, the effect of aqueous extract of green tea on the viability of probiotic bacteria including Lactobacillus acidophilus and Bifidobacterium bifidum and the sensory and physicochemical and functional properties of synbiotic yogurt was investigated during 4 weeks of storage. L. acidophilus and B. bifidum counts did not significantly change in yogurt containing 0.5% and 1% of the extract during storage. Also, the addition of the extract to yogurt highly increased the phenolic compounds, since the amount of phenolic compounds in yogurt containing 0.5% and 1% extract was 660 and 1,123 mg gallic acid/kg, respectively. In addition, a significant increase in the antioxidant activity of yogurt containing green tea extract was observed in comparison with the control. The amount of antioxidant activity increased during 4 weeks of storage, which reached to 4,193 and 7,337 mg BHT eq./kg in probiotic yogurt containing 0.5% and 1% extract, respectively. The acidity increased during 4 weeks of storage, while the pH decreased. Addition of the extract significantly increased the acidity of probiotic yogurt compared with the control (p < .05). In addition, in all studied groups, an increase in syneresis was observed during the study, and the syneresis was greater in yogurt containing aqueous extract of green tea, compared with the control group. Although adding the green tea extract to probiotic yogurt impaired taste, texture, and appearance compared with the plain yogurt, the overall acceptability of these samples was yet above the acceptable level. In conclusion, the results of the study showed that the addition of aqueous extract of green tea increased the antioxidant properties and the amount of phenolic compounds in yogurt, while the viability of probiotic bacteria was not changed. Therefore, the simultaneous use of green tea extract and probiotics in yogurt is recommended as an effective functional food formulation.
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Affiliation(s)
- Fatemeh Rahmani
- Department of Food HygieneFaculty of Veterinary MedicineUniversity of TehranTehranIran
| | - Hassan Gandomi
- Department of Food HygieneFaculty of Veterinary MedicineUniversity of TehranTehranIran
| | - Negin Noori
- Department of Food HygieneFaculty of Veterinary MedicineUniversity of TehranTehranIran
| | - Azita Faraki
- Department of Food HygieneFaculty of Veterinary MedicineUniversity of TehranTehranIran
| | - Melika Farzaneh
- Department of Food Science and TechnologyShahr‐e‐Qods BranchIslamic Azad UniversityTehranIran
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Khurm M, Wang X, Zhang H, Hussain SN, Qaisar MN, Hayat K, Saqib F, Zhang X, Zhan G, Guo Z. The genus Cassia L.: Ethnopharmacological and phytochemical overview. Phytother Res 2021; 35:2336-2385. [PMID: 33617115 DOI: 10.1002/ptr.6954] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 09/16/2020] [Accepted: 11/03/2020] [Indexed: 12/17/2022]
Abstract
Nature gifts medicinal plants with the untapped and boundless treasure of active chemical constituents with significant therapeutic potential that makes these plants a beneficial source in the development of phytomedicines. Genus Cassia, with approximately 500 species, is a large group of flowering plants in the family Fabaceae. Cassia species are widely distributed throughout different regions mainly tropical Asia, North America, and East Africa. In the folk medicinal history, these plants are used as laxative and purgative agents. In the Ayurveda system of medicine, they are used to cure headache and fever. Cassia plants exhibit pharmacological activities at large scales such as antimicrobial, anticancer, antiinflammatory, antioxidant, hypoglycemic, hyperglycemic, antimutagenic, and antivirals. The phytochemical investigations of genus Cassia demonstrate the presence of more than 200 chemical compounds, including piperidine alkaloids, anthracene derivatives (anthraquinones), flavonoids, pentacyclic triterpenoids, sterols, phenylpropanoids, and γ-naphthopyrones. The literature illustrated anthraquinones and flavonoids as major secondary metabolites from this genus. However, some Cassia plants, with rich contents of anthraquinones, still show toxicology properties. As Cassia plants are used extensively in the herbal system of medicine, but only senna dosage forms have achieved the status of the pharmaceutical market as standard laxative agents. In conclusion, further investigations on isolating newer biologically active constituents, unknown underlying mechanisms, toxicology profiles, and clinical studies of Cassia species are needed to be explored. This review article specifies the systematic breach existing between the current scientific knowledge and the fundamentals for the marketization of genus Cassia products.
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Affiliation(s)
- Muhammad Khurm
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, China
| | - Xingbin Wang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, China
| | - Hui Zhang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, China
| | | | | | - Khezar Hayat
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, China
- Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmacy, Xi'an Jiaotong University, Xi'an, China
- Institute of Pharmaceutical Sciences, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Fatima Saqib
- Department of Pharmacology, Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Xinxin Zhang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, China
| | - Guanqun Zhan
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, China
| | - Zengjun Guo
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, China
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Zhang S, Li L, Chen W, Xu S, Feng X, Zhang L. Natural products: The role and mechanism in low-density lipoprotein oxidation and atherosclerosis. Phytother Res 2020; 35:2945-2967. [PMID: 33368763 DOI: 10.1002/ptr.7002] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 10/30/2020] [Accepted: 12/13/2020] [Indexed: 12/11/2022]
Abstract
Atherosclerosis is a chronic inflammatory, metabolic, and epigenetic disease, which leads to the life-threatening coronary artery disease. Emerging studies from bench to bedside have demonstrated the pivotal role of low-density lipoprotein (LDL) oxidation in the initiation and progression of atherosclerosis. This article hereby reviews oxidation mechanism of LDL, and the pro-atherogenic and biomarker role of oxidized LDL in atherosclerosis. We also review the pharmacological effects of several representative natural products (vitamin E, resveratrol, quercetin, probucol, tanshinone IIA, epigallocatechin gallate, and Lycopene) in protecting against LDL oxidation and atherosclerosis. Clinical and basic research supports the beneficial effects of these natural products in inhibiting LDL oxidation and preventing atherosclerosis, but the data are still controversial. This may be related to factors such as the population and the dosage and time of taking natural products involved in different studies. Understanding the mechanism of LDL oxidation and effect of oxidized LDL help researchers to find novel therapies against atherosclerosis.
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Affiliation(s)
- Shengyu Zhang
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Lingli Li
- Department of Pharmacy, Anhui Provincial Hospital, Anhui Medical University, Hefei, China
| | - Wenxu Chen
- Department of Pharmaceutics, College of Pharmacy, Anhui University of Chinese Medicine, Hefei, China
| | - Suowen Xu
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Xiaojun Feng
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Lei Zhang
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.,Department of Pharmacy, Anhui Provincial Hospital, Anhui Medical University, Hefei, China
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Yang JR, Ren TT, Lan R, Qin XY. Tea polyphenols attenuate staurosporine-induced cytotoxicity and apoptosis by modulating BDNF-TrkB/Akt and Erk1/2 signaling axis in hippocampal neurons. IBRO Rep 2020; 8:115-121. [PMID: 32373755 PMCID: PMC7193097 DOI: 10.1016/j.ibror.2020.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 04/09/2020] [Indexed: 01/18/2023] Open
Abstract
Tea polyphenols (TP) are the major ingredients in tea beverages that display health-benefits including anti-oxidation, anti-inflammation, anti-aging, attenuating blood pressure and deflating. In this study, we investigated the neuroprotective effects of TP to attenuate staurosporine (STS)-induced cytotoxicity. Rat hippocampal neurons were isolated, cultured and incubated with STS to induce neurite collapse and apoptosis, however, the medication of TP eliminated these adverse effects and maintained the morphology of neurons. STS decreased the expression of pro-BDNF, downregulated the TrkB/Akt/Bcl-2 signaling axis and promoted the activation of Erk1/2 and caspase-3. In contrast, TP rescued the expression of pro-BDNF and antagonistically restored the biochemistry of aforementioned signaling effectors. Consistently, the activity of TP can be attenuated by the inhibition of TrkB or Akt by small chemicals K252a and LY294002. Therefore, BDNF-TrkB and Akt signaling axis is essential for TP-mediated neuroprotective effects. In summary, TP showed beneficial effects to protect neurons from exogenous insults such as STS-induced neural cytotoxicity and cell death.
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Key Words
- EC, (-)-epicatechin
- ECG, (-)-epigallocatechin
- EGC, (-)-epicatechin-3-gallate
- EGCG, (-)-epigallocatechin-3-gallate
- Erk1/2
- K252a
- LDH, Lactate dehydrogenase
- LY, LY294002
- LY294002
- MAP2
- MAP2, microtubule associated protein 2
- PD98059
- STS, staurosporine
- Staurosporine
- TP, tea polyphenols
- TUNEL, terminal deoxynucleotidyl transferase mediated dUTP nick-end labeling
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Affiliation(s)
- Jian-Rong Yang
- Center on Translational Neuroscience, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.,Department of Hepatobiliary Surgery, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530021, China
| | - Teng-Teng Ren
- Center on Translational Neuroscience, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Rongfeng Lan
- Department of Cell Biology & Medical Genetics, School of Basic Medical Sciences, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Xiao-Yan Qin
- Center on Translational Neuroscience, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
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Effect of Black Mulberry (Morus nigra) Powder on Growth Performance, Biochemical Parameters, Blood Carotenoid Concentration, and Fillet Color of Rainbow Trout. ANNALS OF ANIMAL SCIENCE 2020. [DOI: 10.2478/aoas-2019-0068] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Abstract
The degree of flesh pigmentation is one of the most important quality criteria dictating the fish market value. It is well known that fish, like other animals, cannot synthesize their own coloring pigments de novo, and must obtain these pigments from their diet. In this study, four levels of black mulberry (Morus nigra) juice powder (BMP) as a natural pigment source were incorporated into a basal diet at concentrations of 0, 0.25, 0.5, and 0.75% and fed to rainbow trout weighing 100±5 g for 8 weeks in triplicate. At the end of the feeding trial, the effect of BMP on growth performance, blood biochemical parameters and fillet color was examined. Fish fed BMP showed significant enhancements in weight gain (WG), specific growth (SGR), food conversion ratio (FCR), and survival rates (SR) (P<0.05). SGR, WG and SR values were increased significantly following dietary supplementation with BMP in a dose dependent manner with the highest values in fish fed 0.75%, while the FCR was decreased (P<0.05). Body crude protein, lipid, and moisture contents were increased significantly in fish fed BMP (P<0.05). Dietary BMP has significantly decreased the levels of blood ALT, AST, and glucose (P>0.05). While the blood carotenoid concentration was increased in fish fed 0.5% BMP compared to other treated groups. Fish fed BMP showed increased fillet yellowness (b*) and redness (a*), while the fillet lightness (L*) was decreased when compared to the control (P<0.05). In conclusion, diets supplemented with BMP increased the growth performance, muscle pigmentation, and health status of rainbow trout.
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Mokbel K, Mokbel K. Chemoprevention of Breast Cancer With Vitamins and Micronutrients: A Concise Review. In Vivo 2019; 33:983-997. [PMID: 31280187 DOI: 10.21873/invivo.11568] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/05/2019] [Accepted: 06/21/2019] [Indexed: 02/07/2023]
Abstract
Numerous dietary components and vitamins have been found to inhibit the molecular events and signalling pathways associated with various stages of breast cancer development. To identify the vitamins and dietary micronutrients that exert protective effects against breast cancer and define their mechanism of action, we performed a literature review of in vitro, animal and epidemiological studies and selected the in vitro and animal studies with robust molecular evidence and the epidemiological studies reporting statistically significant inverse associations for a breast cancer-specific protective effect. There is sufficient evidence from in vitro, animal and epidemiological human studies that certain vitamins, such as vitamin D3, folate, vitamin B6, and beta carotene as well as dietary micronutrients, such as curcumin, piperine, sulforaphane, indole-3-carbinol, quercetin, epigallocatechin gallate (EGCG) and omega-3 polyunsaturated fatty acids (PUFAs), display an antitumoral activity against breast cancer and have the potential to offer a natural strategy for breast cancer chemoprevention and reduce the risk of breast cancer recurrence. Therefore, a supplement that contains these micronutrients, using the safest form and dosage should be investigated in future breast cancer chemoprevention studies and as part of standard breast cancer therapy.
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Affiliation(s)
- Kefah Mokbel
- The London Breast Institute, Princess Grace Hospital, London, U.K.
| | - Kinan Mokbel
- The London Breast Institute, Princess Grace Hospital, London, U.K
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Van Doan H, Hoseinifar SH, Sringarm K, Jaturasitha S, Yuangsoi B, Dawood MAO, Esteban MÁ, Ringø E, Faggio C. Effects of Assam tea extract on growth, skin mucus, serum immunity and disease resistance of Nile tilapia (Oreochromis niloticus) against Streptococcus agalactiae. FISH & SHELLFISH IMMUNOLOGY 2019; 93:428-435. [PMID: 31362090 DOI: 10.1016/j.fsi.2019.07.077] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/22/2019] [Accepted: 07/26/2019] [Indexed: 06/10/2023]
Abstract
The present study aimed to assess the possible effects of Assam tea (Camellia sinensis) extract (ATE) on growth performances, immune responses, and disease resistance of Nile tilapia, Oreochromis niloticus against Streptococcus agalactiae. Five levels of ATE were supplemented into the based diet at 0, 1, 2, 4, and 8 g kg-1 feed of Nile tilapia fingerlings (10.9 ± 0.04 g initial weight) in triplicate. After four and eight weeks of feeding, fish were sampled to determine the effects of the tea supplements upon their growth performance, as well as serum and mucosal immune responses. A disease challenge using S. agalactiae was conducted at the end of the feeding trial. Fish fed ATE revealed significantly improved serum lysozyme, peroxidase, alternative complement (ACH50), phagocytosis, and respiratory burst activities compared to the basal control fed fish (P < 0.05). The mucus lysozyme and peroxidase activities were ameliorated through ATE supplementation in the tilapia diets. Supplementation of ATE significantly (P < 0.05) enhanced final body weight, weight gain, and specific growth rate; while a decreased feed conversion ratio was revealed at 2 g kg-1 inclusion level, after four and eight weeks. Challenge test showed that the relative percent survival (RSP) of fish in each treatment was 33.33%, 60.00%, 83.33%, 76.68%, and 66.68% in groups fed 0, 1, 2, 4, and 8 g kg-1, respectively. In summary, diets supplemented with ATE especially at 2 g kg-1 increased the humoral and mucosal immunity, enhanced growth performance, and offered higher resistance against S. agalactiae infection in Nile tilapia.
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Affiliation(s)
- Hien Van Doan
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand; Science and Technology Research Institute, Chiang Mai University, 239 Huay Keaw Rd., Suthep, Muang, Chiang Mai, 50200, Thailand
| | - Seyed Hossein Hoseinifar
- Department of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Korawan Sringarm
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Sanchai Jaturasitha
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand; Science and Technology Research Institute, Chiang Mai University, 239 Huay Keaw Rd., Suthep, Muang, Chiang Mai, 50200, Thailand
| | - Bundit Yuangsoi
- Department of Fisheries, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Mahmoud A O Dawood
- Department of Animal Production, Faculty of Agriculture, Kafrelsheikh University, 33516, Kafrelsheikh, Egypt.
| | - Maria Ángeles Esteban
- Fish Innate Immune System Group, Department of Cell Biology & Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Spain
| | - Einar Ringø
- Norwegian College of Fishery Science, Faculty of Bioscience, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Caterina Faggio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina Viale Ferdinando Stagno D'Alcontres, 31 98166, S. Agata, Messina, Italy
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Doan HV, Hoseinifar SH, Sringarm K, Jaturasitha S, Khamlor T, Dawood MAO, Esteban MÁ, Soltani M, Musthafa MS. Effects of elephant's foot (Elephantopus scaber) extract on growth performance, immune response, and disease resistance of nile tilapia (Oreochromis niloticus) fingerlings. FISH & SHELLFISH IMMUNOLOGY 2019; 93:328-335. [PMID: 31344457 DOI: 10.1016/j.fsi.2019.07.061] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 06/24/2019] [Accepted: 07/22/2019] [Indexed: 06/10/2023]
Abstract
Medicinal plant has been applied as an alternative strategy for antibiotics and chemotherapeutics for controlling the outbreak of diseases in tilapia farming. In this study, five doses of Elephantopus scaber extract (ESE) were added to the basal diet at 0, 2.5, 5, 10, and 20 g kg-1 feed of Nile tilapia fingerlings (13.92 ± 0.06 g initial weight) in triplicate. After 4- and 8- weeks post-feeding, fish were sampled to determine the effects of the ESE supplemented on fish's growth performance, humoral, and skin mucus immune response. After 8 weeks post-feeding, a challenge test against Streptococcus agalactiae was carried out using 10 fish from each tank. Fish fed ESE showed significantly increased serum lysozyme (SL), serum peroxidase (SP), alternative complement (ACH50), phagocytosis (PI), and respiratory burst (RB) compared to the control group (P < 0.05). The skin mucus lysozyme (SMLA) and skin peroxidase (SMPA) were stimulated in fish fed ESE diets. Dietary inclusion of ESE significantly (P < 0.05) promoted final body weight (FW), weight gain (WG), and specific growth rate (SGR); while a reduction in feed conversion ratio (FCR) was observed in fish fed 5 g kg-1 ESE, after 8 weeks post-feeding. The challenge study indicated that the relative percent survival (RSP) was 38.10%, 76.19%, 66.67%, and 47.62% in Diet 2, Diet 3, Diet 4, and Diet 5, respectively. Among the supplemented groups, dietary of 5 g kg-1 ESE showed significantly higher RPS and the highest resistance to S. agalactiae in comparison with other groups. In conclusion, supplementation of ESE (5 g kg-1) enhanced the humoral and mucosal immunity, promoted growth performance, and improved disease resistance of Nile tilapia against Streptococcus agalactiae.
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Affiliation(s)
- Hien Van Doan
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand; Science and Technology Research Institute, Chiang Mai University, 239 Huay Keaw Rd, Suthep, Muang, Chiang Mai, 50200, Thailand.
| | - Seyed Hossein Hoseinifar
- Department of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Korawan Sringarm
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Sanchai Jaturasitha
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand; Science and Technology Research Institute, Chiang Mai University, 239 Huay Keaw Rd, Suthep, Muang, Chiang Mai, 50200, Thailand
| | - Trisadee Khamlor
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Mahmoud A O Dawood
- Department of Animal Production, Faculty of Agriculture, Kafrelsheikh University, 33516, Kafrelsheikh, Egypt
| | - Maria Ángeles Esteban
- Fish Innate Immune System Group, Department of Cell Biology & Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Spain
| | - Mehdi Soltani
- Fresh water and Fish Health Group, Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, Australia
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Suleman R, Wang Z, Hui T, Pan T, Liu H, Zhang D. Utilization of Asian spices as a mitigation strategy to control heterocyclic aromatic amines in charcoal grilled lamb patties. J FOOD PROCESS PRES 2019. [DOI: 10.1111/jfpp.14182] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Raheel Suleman
- Key Laboratory of Agro‐products Processing, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences Ministry of Agriculture and Rural Affairs Beijing P.R. China
| | - Zhenyu Wang
- Key Laboratory of Agro‐products Processing, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences Ministry of Agriculture and Rural Affairs Beijing P.R. China
| | - Teng Hui
- Key Laboratory of Agro‐products Processing, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences Ministry of Agriculture and Rural Affairs Beijing P.R. China
| | - Teng Pan
- Key Laboratory of Agro‐products Processing, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences Ministry of Agriculture and Rural Affairs Beijing P.R. China
| | - Huan Liu
- Key Laboratory of Agro‐products Processing, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences Ministry of Agriculture and Rural Affairs Beijing P.R. China
| | - Dequan Zhang
- Key Laboratory of Agro‐products Processing, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences Ministry of Agriculture and Rural Affairs Beijing P.R. China
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11
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Green Tea Consumption and Risk of Breast Cancer and Recurrence-A Systematic Review and Meta-Analysis of Observational Studies. Nutrients 2018; 10:nu10121886. [PMID: 30513889 PMCID: PMC6316745 DOI: 10.3390/nu10121886] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 11/27/2018] [Accepted: 11/28/2018] [Indexed: 01/01/2023] Open
Abstract
Breast cancer (BC) is the most common cancer in women and several factors are involved in its onset. Green tea (GT) has been shown to have potential beneficial effects on different types of cancer. The aim of this review was to evaluate the association between GT regular consumption and risk of BC in women. The risk of BC recurrence and risk of BC in relation to menopausal status were also evaluated. A literature search of PubMed, Scopus, and Web of Science was conducted. Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed to perform the systematic review and meta-analysis. Full texts were downloaded for 40 studies; however, only 13 records were included in the meta-analysis. Eight were cohort studies and five were case-control studies. The pooled sample consisted of 163,810 people. An inverse statistically significant relationship between GT and BC risk, with an Odds Ratio (OR) = 0.85 ((95% CI = 0.80–0.92), p = 0.000)), was found. Egger’s linear regression test did not show a potential publication bias (intercept 0.33, t = 0.40, p = 0.695), which was also confirmed by the symmetry of the funnel plot. Moreover, no high statistical heterogeneity (Chi2 = 31.55, df = 13, I2 = 58.79%, p = 0.003) was found. The results of this meta-analysis showed a potential protective effect of GT consumption on BC, especially for BC recurrence.
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Eruygur N, Dincel NGK, Kutuk N. Modeling of Total Phenolic contents in Various Tea samples by Experimental Design Methods. OPEN CHEM 2018. [DOI: 10.1515/chem-2018-0082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Tea, from the old ages to the day, is widely consumed both for enjoyment and health care due to its positive effects. The consumption of these products is increasing day by day as a result of the clear presentation of the fact that tea contains high amount of antioxidant substances (such as phenolic compounds), which is important in prevention and treatment of diseases. Tea beverage is a very important source of polyphenols. In this study, phenolic content and antioxidant capacity of different tea species were calculated by modeling with experimental design method. In the experimental part, polyphenol content was determined using the Folin-Ciocalteu method. The total amount of phenolic substance content was examined by Box-Behnken design and response surface method on black tea, green tea and white tea on different extraction temperature, extraction time and solid / liquid ratio. Solid / liquid ratio was found to be the most important parameter in terms of polyphenol content extraction from different tea samples. The highest polyphenol amount (411.762 mg gallic acid / mL) was found in green tea. To the best of our knowledge, this is the first data presenting comparatively study the effect of extraction condition on amounts of phenolic compounds from different tea samples.
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Affiliation(s)
- Nuraniye Eruygur
- Department of Pharmacognosy , Faculty of Pharmacy , Selcuk University , Konya , Turkey
| | | | - Nursah Kutuk
- Department of Chemical Engineering , Faculty of Engineering , Cumhuriyet University , Sivas , Turkey
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Total Polyphenol Content and Antioxidant Capacity of Tea Bags: Comparison of Black, Green, Red Rooibos, Chamomile and Peppermint over Different Steep Times. BEVERAGES 2018. [DOI: 10.3390/beverages4010015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Ma SB, Zhang R, Miao S, Gao B, Lu Y, Hui S, Li L, Shi XP, Wen AD. Epigallocatechin-3-gallate ameliorates insulin resistance in hepatocytes. Mol Med Rep 2017; 15:3803-3809. [DOI: 10.3892/mmr.2017.6450] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Accepted: 12/19/2016] [Indexed: 11/05/2022] Open
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15
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Weerawatanakorn M, Hung WL, Pan MH, Li S, Li D, Wan X, Ho CT. Chemistry and health beneficial effects of oolong tea and theasinensins. FOOD SCIENCE AND HUMAN WELLNESS 2015. [DOI: 10.1016/j.fshw.2015.10.002] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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16
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Chen Q, Zhang D, Pan W, Ouyang Q, Li H, Urmila K, Zhao J. Recent developments of green analytical techniques in analysis of tea's quality and nutrition. Trends Food Sci Technol 2015. [DOI: 10.1016/j.tifs.2015.01.009] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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17
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Wu Z, Teng J, Huang L, Xia N, Wei B. Stability, antioxidant activity and in vitro bile acid-binding of green, black and dark tea polyphenols during simulated in vitro gastrointestinal digestion. RSC Adv 2015. [DOI: 10.1039/c5ra18784b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The stability and antioxidant activity of phenolic compounds, as well as the bile acid-binding activity of green, black, raw liubao and aged liubao tea duringin vitrogastrointestinal digestion were evaluated.
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Affiliation(s)
- Zhengmei Wu
- College of Light Industry and Food Engineering
- Guangxi University
- Nanning 530004
- PR China
| | - Jianwen Teng
- College of Light Industry and Food Engineering
- Guangxi University
- Nanning 530004
- PR China
| | - Li Huang
- College of Light Industry and Food Engineering
- Guangxi University
- Nanning 530004
- PR China
| | - Ning Xia
- College of Light Industry and Food Engineering
- Guangxi University
- Nanning 530004
- PR China
| | - Baoyao Wei
- College of Light Industry and Food Engineering
- Guangxi University
- Nanning 530004
- PR China
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Anti Oxidative Effect of Black Tea Theaflavin on Erythrocytes Subjected to Oxidative Stress. NATIONAL ACADEMY SCIENCE LETTERS-INDIA 2014. [DOI: 10.1007/s40009-014-0285-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Bhattacharya U, Adak S, Majumder NS, Bera B, Giri AK. Antimutagenic and anticancer activity of Darjeeling tea in multiple test systems. Altern Ther Health Med 2014; 14:327. [PMID: 25183356 PMCID: PMC4161774 DOI: 10.1186/1472-6882-14-327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 08/11/2014] [Indexed: 11/10/2022]
Abstract
Background Darjeeling tea, a most popular variety of black tea, though consumed by the people in different parts of world but its beneficial health effects have not been investigated in details. In this study, the antimutagenic and anticancer effect of Darjeeling tea extract (DTE) has been evaluated. Methods Antimutagenic activity of the DTE was carried out in two different strains of Salmonella typhimurium by AMES test against a known mutagen benzo[a]pyrene (B[a]P) with S9 activation. Moreover, anticlastogenic property of DTE was also measured by micronuclei formation (MN) against B[a]P with S9 activation in human lymphocytes. The anticancer activity of the same was studied on U937 cell line. Here, Human PBMCs were used as the normal cell control to identify selective anticancer activity of the extract against U937 cells. Results The results showed significant antimutagenic activity on bacterial strains. A significant decrease in MN was also observed in the DTE treated human lymphocyte cultures pretreated with B[a]P when compared with B[a]P treated cultures alone. The study clearly exhibited anticancer activity of the extract on U937 cell line. Further studies also revealed that apoptosis induction is an important mechanism behind the anticancer effect of DTE. Conclusion Overall, this study indicates that DTE has significant antimutagenic and anticancer activities on bacterial and mammalian cells respectively.
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Yamashita Y, Wang L, Wang L, Tanaka Y, Zhang T, Ashida H. Oolong, black and pu-erh tea suppresses adiposity in mice via activation of AMP-activated protein kinase. Food Funct 2014; 5:2420-9. [PMID: 25098399 DOI: 10.1039/c4fo00095a] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
It is well known that tea has a variety of beneficial impacts on human health, including anti-obesity effects. It is well documented that green tea and its constituent catechins suppress obesity, but the effects of other types of tea on obesity and the potential mechanisms involved are not yet fully understood. In this study, we investigated the suppression of adiposity by oolong, black and pu-erh tea and characterized the underlying molecular mechanism in vivo. We found that the consumption of oolong, black or pu-erh tea for a period of one week significantly decreased visceral fat without affecting body weight in male ICR mice. On a mechanistic level, the consumption of tea enhanced the phosphorylation of AMP-activated protein kinase (AMPK) in white adipose tissue (WAT). This was accompanied by the induction of WAT protein levels of uncoupling protein 1 and insulin-like growth factor binding protein 1. Our results indicate that oolong, black and pu-erh tea, and in particular, black tea, suppresses adiposity via phosphorylation of the key metabolic regulator AMPK and increases browning of WAT.
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Affiliation(s)
- Yoko Yamashita
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Nada-ku, Kobe 657-8501, Japan.
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Shu Z, Yu M, Zeng G, Zhang X, Wu L, Tan X. Epigallocatechin-3-gallate inhibits proliferation of human aortic smooth muscle cells via up-regulating expression of mitofusin 2. Eur J Cell Biol 2014; 93:137-44. [PMID: 24880525 DOI: 10.1016/j.ejcb.2014.04.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 04/23/2014] [Accepted: 04/24/2014] [Indexed: 02/05/2023] Open
Abstract
Previous studies have shown that epigallocatechin-3-gallate (EGCG) inhibits the proliferation of vascular smooth muscle cells (VSMCs) via the extracellular-signal-regulated kinase (ERK1/2) and mitogen activated protein kinases (MAPKs) pathway. Mitofusin 2 (Mfn-2) also suppresses VSMC proliferation through Ras-Raf-ERK/MAPK, suggesting a possible link between EGCG, Mfn-2 and ERK/MAPK. However, the effect of EGCG on Mfn-2 remains unknown. In this study, we investigated the role of Mfn-2 in the regulation of VSMC proliferation by EGCG, and assessed the underlying mechanisms. The effects of EGCG on the proliferation of cultured human aortic smooth muscle cells (HASMCs) were observed by 5-ethynl-2-deoxyuridine (EdU) incorporation assay. Mfn-2 gene and protein levels, and Ras, p-c-Raf and p-ERK1/2 protein levels were determined by quantitative real-time polymerase chain reaction and western blotting, respectively. Mfn-2 gene silencing was achieved by RNA interference. EGCG 50 μmol/L profoundly inhibited the proliferation of HASMCs in culture, up-regulated Mfn-2, and down-regulated the expression of p-c-Raf and p-ERK1/2. Furthermore, RNA interference-mediated gene knockdown of Mfn-2 antagonized EGCG-induced anti-proliferation and down-regulation of Ras, p-c-Raf and p-ERK1/2. These results suggest that EGCG inhibits the proliferation of HASMCs in vitro largely via Mfn-2-mediated suppression of the Ras-Raf-ERK/MAPK signaling pathway.
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Affiliation(s)
- Zhouwu Shu
- Department of Cardiology, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China; Molecular Biology Laboratory, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Min Yu
- Department of Cardiology, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China; Molecular Biology Laboratory, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Guoning Zeng
- Molecular Biology Laboratory, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Xin Zhang
- Molecular Biology Laboratory, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Libiao Wu
- Molecular Biology Laboratory, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China
| | - Xuerui Tan
- Department of Cardiology, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, China.
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Fatima M, Kesharwani RK, Misra K, Rizvi SI. Protective effect of theaflavin on erythrocytes subjected to in vitro oxidative stress. Biochem Res Int 2013; 2013:649759. [PMID: 24455262 PMCID: PMC3880739 DOI: 10.1155/2013/649759] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 10/01/2013] [Accepted: 10/03/2013] [Indexed: 11/18/2022] Open
Abstract
Antioxidant and free radical scavenging effect of black tea theaflavins has been shown in many epidemiological studies. In the present work we report the protective mechanism of tea theaflavins on biomarkers of oxidative stress, which are elevated during stress conditions. We hereby report the in vitro effect of theaflavins on erythrocyte malondialdehyde (MDA), intracellular reduced glutathione (GSH), and plasma membrane redox system (PMRS) of rats. The effect of theaflavin on PMRS has also been validated through an in silico docking simulation study using Molegro Virtual Docker (MVD). We report that theaflavins show significant protection to erythrocyte against oxidative stress induced by tert-butyl hydroperoxide (t-BHP). The findings suggest a possible protective role of theaflavins as antioxidant.
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Affiliation(s)
- Mahejabeen Fatima
- Department of Biochemistry, University of Allahabad, Allahabad 211002, India
| | - Rajesh Kumar Kesharwani
- Division of Applied Science & Indo-Russian Center for Biotechnology (IRCB), Indian Institute of Information Technology, Allahabad 211012, India
| | - Krishna Misra
- Division of Applied Science & Indo-Russian Center for Biotechnology (IRCB), Indian Institute of Information Technology, Allahabad 211012, India
| | - Syed Ibrahim Rizvi
- Department of Biochemistry, University of Allahabad, Allahabad 211002, India
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Park JH, Choi YJ, Kim YW, Kim SP, Cho HC, Ahn S, Bae KC, Im SS, Bae JH, Song DK. Green tea extract with polyethylene glycol-3350 reduces body weight and improves glucose tolerance in db/db and high-fat diet mice. Naunyn Schmiedebergs Arch Pharmacol 2013; 386:733-45. [PMID: 23620335 DOI: 10.1007/s00210-013-0869-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 04/02/2013] [Indexed: 02/08/2023]
Abstract
Green tea extract (GTE) is regarded to be effective against obesity and type 2 diabetes, but definitive evidences have not been proven. Based on the assumption that the gallated catechins (GCs) in GTE attenuate intestinal glucose and lipid absorption, while enhancing insulin resistance when GCs are present in the circulation through inhibiting cellular glucose uptake in various tissues, this study attempted to block the intestinal absorption of GCs and prolong their residence time in the lumen. We then observed whether GTE containing the nonabsorbable GCs could ameliorate body weight (BW) gain and glucose intolerance in db/db and high-fat diet mice. Inhibition of the intestinal absorption of GCs was accomplished by co-administering the nontoxic polymer polyethylene glycol-3350 (PEG). C57BLKS/J db/db and high-fat diet C57BL/6 mice were treated for 4 weeks with drugs as follows: GTE, PEG, GTE+PEG, voglibose, or pioglitazone. GTE mixed with meals did not have any ameliorating effects on BW gain and glucose intolerance. However, the administration of GTE plus PEG significantly reduced BW gain, insulin resistance, and glucose intolerance, without affecting food intake and appetite. The effect was comparable to the effects of an α-glucosidase inhibitor and a peroxisome proliferator-activated receptor-γ/α agonist. These results indicate that prolonging the action of GCs of GTE in the intestinal lumen and blocking their entry into the circulation may allow GTE to be used as a prevention and treatment for both obesity and obesity-induced type 2 diabetes.
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Affiliation(s)
- Jae-Hyung Park
- Department of Physiology and Endocrinology, Keimyung University School of Medicine, 1095 Dalgubeoldae-Ro, Dalseo-Gu, Daegu, 704-701, South Korea
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Weisburger JH. Prevention of coronary heart disease and cancer by tea, a review. Environ Health Prev Med 2012; 7:283-8. [PMID: 21432397 DOI: 10.1007/bf02908887] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2002] [Accepted: 11/14/2002] [Indexed: 12/31/2022] Open
Abstract
Biomedical research has uncovered the mechanisms whereby tea promotes good health and lowers the risk of major chronic diseases, such as heart disease and many types of cancer. The active components in tea are polyphenols, epigallocatechin gallate in green tea, theaflavins and thearubigins in black tea. Green and black tea and the polyphenols have similar beneficial effects. The mechanisms are categorized into 5 groups. 1) Tea polyphenols are powerful antioxidants. They decrease the oxidation of LDL cholesterol and lower the risk of heart disease, and also inhibit action of reactive oxygen species mediating the oxidation of DNA associated with carcinogenesis 2) Tea polyphenols induce detoxifying enzymes, glucuronosyl transferases, eliminating active forms of carcinogens and other toxicants, accounting for the lower cancer risk. 3) Tea polyphenols lower duplication rates of cancer cells and inhibit the growth of cancer, increase apoptosis and lower angiogenesis. 4) Tea polyphenols alter the intestinal bacterial flora, suppressing undesirable bacteria and favoring growth of beneficial bacteria. 5) Aging phenomena, and diseases associated with the formation of reactive oxygen species (ROS) are inhibited.
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Affiliation(s)
- John H Weisburger
- Institute for Cancer Prevention, American Health Foundation, 1 Dana Road, 10595, Valhalla, NY, USA,
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26
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Bioaccessibility of green tea polyphenols incorporated into an edible agar film during simulated human digestion. Food Res Int 2012. [DOI: 10.1016/j.foodres.2012.04.024] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bhouri W, Boubaker J, Skandrani I, Ghedira K, Chekir Ghedira L. Investigation of the apoptotic way induced by digallic acid in human lymphoblastoid TK6 cells. Cancer Cell Int 2012; 12:26. [PMID: 22686580 PMCID: PMC3487787 DOI: 10.1186/1475-2867-12-26] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 05/29/2012] [Indexed: 11/16/2022] Open
Abstract
Background The digallic acid (DGA) purified from Pistacia lentiscus. L fruits was investigated for its antiproliferative and apoptotic activities on human lymphoblastoid TK6 cells. Methods We attempt to characterize the apoptotic pathway activated by DGA. Apoptosis was detected by DNA fragmentation, PARP cleavage and by evaluating caspase activities. Results The inhibition of lymphoblastoid cell proliferation was noted from 8.5 μg/ml of DGA. The induction of apoptosis was confirmed by DNA fragmentation and PARP cleavage. We have demonstrated that DGA induces apoptosis by activating the caspase-8 extrinsic pathway. Caspase-3 was also activated in a dose dependent manner. Conclusion In summary, DGA exhibited an apoptosis inductor effect in TK6 cells revealing thus its potential as a cancer-preventive agent.
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Affiliation(s)
- Wissem Bhouri
- Laboratoire de biologie Cellulaire et Moléculaire, Faculté de Medecine Dentaire Monastir, Rue Avicenne, Monastir, 5000 Tunisia.
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Sun Y, Li W, Wang J, Bi J, Su S. Determination of rutin in cigarette tobacco, filters, mainstream smoke and burned ash of different branded cigarettes by high performance liquid chromatography. Molecules 2012; 17:3751-60. [PMID: 22450684 PMCID: PMC6269046 DOI: 10.3390/molecules17043751] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 03/13/2012] [Accepted: 03/20/2012] [Indexed: 11/17/2022] Open
Abstract
Tobacco consists of at least 3,800 chemical constituents. Among them, rutin is an important polyphenolic secondary metabolite in tobacco, which has positive actions such as antiallergic, anti-inflammatory and vasoactive, antitumor, antibacterial, antiviral and anti-protozoal properties. A high performance liquid chromatography method was used to analyze rutin in tobacco and filters, mainstream smoke, and burned ash of ten varieties of cigarettes made in China. The chromatographic analysis was performed on a Hypersil ODS2 column with a gradient elution of acetonitrile and water at a flow rate of 1.0 mL/min. Detection was carried out at 350 nm using a photodiode array detector. The calibration curves for the determination of analytes showed good linearity over the investigated ranges (R2 > 0.9998). Precision and reproducibility were evaluated by six replicated analyses, and the R.S.D. values were less than 0.59% and 1.53%. The recoveries were between 98.47 and 100.84%. Under the optimized conditions, namely 45 mL/g of solvent to solid ratio, 30 min of extraction time and 200 W of ultrasound power, the concentrations of rutin in tobacco and filter, mainstream smoke, burned ash of different brands cigarettes were 10.20-63.98, 0.10-0.32, 0.06-0.16 and 0 μg/per cigarette, respectively.
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Affiliation(s)
- Yinshi Sun
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian 271018, China
| | - Wei Li
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China
| | - Jianhua Wang
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian 271018, China
| | - Jianjie Bi
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian 271018, China
| | - Shudong Su
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian 271018, China
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Protective Effects of Green Tea Extract against Hepatic Tissue Injury in Streptozotocin-Induced Diabetic Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:740671. [PMID: 22956978 PMCID: PMC3432555 DOI: 10.1155/2012/740671] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 11/22/2011] [Accepted: 11/29/2011] [Indexed: 01/14/2023]
Abstract
Although diabetic hepatopathy is potentially less common, it may be appropriate for addition to the list of target organ conditions related to diabetes. This study was designed to evaluate the hepatoprotective properties of green tea extract (GTE) in STZ-induced diabetes in rats. Wistar rats were made diabetic through single injection of STZ (75 mg/kg i.p.). The rats were randomly divided into four groups of 10 animals each: Group 1, healthy control; Group 2, nondiabetics treated with GTE administered orally (1.5%, w/v); Group 3, diabetics; Group 4, diabetics treated with GTE (1.5%, w/v) for 8 weeks. Serum biomarkers were assessed to determine hepatic injury. Malondialdehyde (MDA) and reduced glutathione (GSH) contents were measured to assess free radical activity in the liver tissue. Hepatic antioxidant activities of glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), and catalase (CAT) were also determined. The biochemical findings were matched with histopathological verifications. Liver MDA content and serum levels of ALT, AST, ALP, and bilirubin in Group 3 significantly increased compared to Group 1 (P < 0.05) and significantly decreased in Group 4 compared to Group 3 (P < 0.05). Serum albumin level and GSH, SOD, CAT, and GSH-Px contents of the liver in Group 3 were significantly decreased compared to Group 1 (P < 0.05) and were significantly increased in Group 4 compared to Group 3 (P < 0.05). Histopathologically, the changes were in the same direction with biochemical findings. This study proved the hepatoprotective activity of GTE in experimentally induced diabetic rats.
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Associations between frequency of tea consumption and health and mortality: evidence from old Chinese. Br J Nutr 2012; 108:1686-97. [PMID: 22243697 DOI: 10.1017/s0007114511007173] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Tea consumption may be associated with reduced risk of morbidity and mortality; however, this association is not conclusive and has rarely been investigated among very old adults. The present study examines how self-reported frequency of tea consumption in daily life is associated with health and mortality among very old adults in China. The data are from a national longitudinal data set that included 32 606 individuals (13 429 men and 19 177 women) aged 65 years and older: 11 807 respondents aged 65 to 84 years and 20 799 respondents aged 85 years and older. A total of four measurements between 1998 and 2005 resulted in 51 668 observations. Hazard regressions showed that men who drink tea almost every day have a 10-20 % lower risk of death compared to their counterparts who seldom drink tea, after adjusting for numerous confounders including baseline health. This relationship was stronger in younger male elders aged 65 to 84 years than in the oldest-old men aged 85 years and older. However, frequency of tea consumption was not significantly associated with mortality in women. Our analyses further show that high frequency of tea consumption is significantly associated with reduced OR of disability in activities of daily living, cognitive impairment, self-rated poor health, cumulative health deficits and CVD in both young elders and the oldest-old, and in both men and women. These results suggest that the health benefit of drinking tea is universal. We conclude that frequent tea consumption probably helps one achieve healthy longevity and that men benefit more from such lifestyles.
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Kumar B, Gupta SK, Nag TC, Srivastava S, Saxena R. Green Tea Prevents Hyperglycemia-Induced Retinal Oxidative Stress and Inflammation in Streptozotocin-Induced Diabetic Rats. Ophthalmic Res 2012; 47:103-8. [DOI: 10.1159/000330051] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Accepted: 06/06/2011] [Indexed: 12/12/2022]
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Perfecting the Plate: Adding Cardioprotective Compounds to the Diet. J Am Coll Surg 2012; 214:97-114. [DOI: 10.1016/j.jamcollsurg.2011.09.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 09/15/2011] [Accepted: 09/21/2011] [Indexed: 11/22/2022]
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Bothe H, Gassmann K, Götz C, Fritsche E, Abel J, Haarmann-Stemmann T. Epigallocatechin-3-gallate does not affect the activity of enzymes involved in metabolic activation and cellular excretion of benzo[a]pyrene in human colon carcinoma cells. Toxicol Lett 2011; 203:258-64. [DOI: 10.1016/j.toxlet.2011.03.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 03/18/2011] [Accepted: 03/23/2011] [Indexed: 11/24/2022]
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Khan S, Mehmood MH, Ali ANA, Ahmed FS, Dar A, Gilani AH. Studies on anti-inflammatory and analgesic activities of betel nut in rodents. JOURNAL OF ETHNOPHARMACOLOGY 2011; 135:654-61. [PMID: 21501676 DOI: 10.1016/j.jep.2011.03.064] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2010] [Revised: 03/12/2011] [Accepted: 03/29/2011] [Indexed: 05/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Areca catechu, commonly known as betel nut, is very famous for its medicinal use in multiple disorders. It is also popular as a remedy against inflammatory disorders in the Unani (Greco-Arab) system of medicine. OBJECTIVE OF THE STUDY This study was aimed at investigating the anti-inflammatory and analgesic activities of the crude extract of Areca catechu and its respective fractions. MATERIALS AND METHODS Paw edema, formalin-induced nociception and acetic acid-induced writhing assays were carried out in vivo. Free radical scavenging activity of the plant extract was performed in vitro. RESULTS Preliminary experiments using a single dose (100 mg/kg) of Areca catechu and its respective fractions demonstrated an anti-inflammatory effect on carrageenan-induced edema in mice and rats, the aqueous fraction being distinctly more effective. When studied on prostaglandin E₂ (PGE₂), arachidonic acid, histamine, or serotonin (5HT)-induced edema in rats, Areca catechu and its aqueous fraction markedly repressed only the PGE₂ and arachidonic acid-induced inflammation. When studied for analgesic activity, the crude extract and its aqueous fraction produced a dose-dependent (10-100 mg/kg) inhibitory effect on formalin-induced nociception in mice and acetic acid-induced writhing in rats, similar to aspirin. In DPPH assay, Areca catechu and its aqueous fraction exhibited free radical scavenging activity with respective IC(50) values of 5.34 μg/ml (4.93-5.78, CI; 95%, n=5) and 7.28 μg/ml (6.04-7.95, n=4), like that of rutin with IC(50) value of 4.75 μg/ml (3.89-5.42, n=4). CONCLUSION These results indicate the anti-inflammatory and analgesic effects of Areca catechu and provide a rationale for its medicinal use in inflammatory disorders.
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Affiliation(s)
- Shagufta Khan
- Natural Product Research Division, Department of Biological and Biomedical Sciences, the Aga Khan University Medical College, Karachi 74800, Pakistan
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NNK-Induced Lung Tumors: A Review of Animal Model. JOURNAL OF ONCOLOGY 2011; 2011:635379. [PMID: 21559252 PMCID: PMC3087887 DOI: 10.1155/2011/635379] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 12/27/2010] [Accepted: 01/20/2011] [Indexed: 12/17/2022]
Abstract
The incidence of lung adenocarcinoma has been remarkably increasing in recent years due to the introduction of filter cigarettes and secondary-hand smoking because the people are more exposed to higher amounts of nitrogen oxides, especially 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone(NNK), which is widely applied in animal model of lung tumors. In NNK-induced lung tumors, genetic mutation, chromosome instability, gene methylation, and activation of oncogenes have been found so as to disrupt the expression profiles of some proteins or enzymes in various cellular signal pathways. Transgenic animal with specific alteration of lung cancer-related molecules have also been introduced to clarify the molecular mechanisms of NNK in the pathogenesis and development of lung tumors. Based on these animal models, many antioxidant ingredients and antitumor chemotherapeutic agents have been proved to suppress the NNK-induced lung carcinogenesis. In the future, it is necessary to delineate the most potent biomarkers of NNK-induced lung tumorigenesis, and to develop efficient methods to fight against NNK-associated lung cancer using animal models.
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Haza AI, Coto AL, Morales P. Comparison of the Ability of Myricetin and Quercetin to Modulate the Oxidative DNA Damage Induced by Heterocyclic Amines. ACTA ACUST UNITED AC 2011. [DOI: 10.4236/fns.2011.24051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Tayama Y, Sugihara K, Sanoh S, Miyake K, Morita S, Kitamura S, Ohta S. Effect of Tea Beverages on Aldehyde Oxidase Activity. Drug Metab Pharmacokinet 2011; 26:94-101. [DOI: 10.2133/dmpk.dmpk-10-nt-078] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Haza AI, Morales P. Effects of (+)catechin and (−)epicatechin on heterocyclic amines-induced oxidative DNA damage. J Appl Toxicol 2010; 31:53-62. [DOI: 10.1002/jat.1559] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Tu SH, Ku CY, Ho CT, Chen CS, Huang CS, Lee CH, Chen LC, Pan MH, Chang HW, Chang CH, Chang YJ, Wei PL, Wu CH, Ho YS. Tea polyphenol (-)-epigallocatechin-3-gallate inhibits nicotine- and estrogen-induced α9-nicotinic acetylcholine receptor upregulation in human breast cancer cells. Mol Nutr Food Res 2010; 55:455-66. [PMID: 21370452 DOI: 10.1002/mnfr.201000254] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Revised: 08/08/2010] [Accepted: 09/03/2010] [Indexed: 12/11/2022]
Abstract
SCOPE The aim of this research was to explore whether the tea-polyphenol (-)-epigallocatechin-3-gallate (EGCG) could be used as a potential agent for blocking smoking (nicotine, Nic)- or hormone (estradiol, E2)-induced breast cancer cell proliferation through inhibition of a common signaling pathway. METHODS AND RESULTS To explore whether Nic (>0.1 μM, 24 h) and E2 (>1 nM, 24 h) significantly increased α9-nicotinic acetylcholine (α9-nicotinic acetylcholine receptor (nAChR)) mRNA and protein expression levels, real-time PCR and immunoblotting analysis experiments were performed in human breast cancer (MCF-7) cells. Luciferase promoter activity experiment was performed to test the α9-nAChR promoter activity affected by Nic, E2 or EGCG. The results indicate that treatment with EGCG (1 μM) profoundly decreases Nic- and E2-induced MCF-7 proliferation by down regulating α9-nAChR expression. The α9-nAChR promoter activity is significantly induced by 24-h treatment with Nic (10 μM) or E2 (10 nM) (>1.8 and ∼2.3-fold, respectively) in MCF-7 cells. Pretreatment with EGCG eliminated the Nic- and E2-induced α9-nAChR promoter-dependent luciferase activity. We further demonstrate that combined treatment with EGCG profoundly inhibits [3H]-Nic/ α9-nAChR binding activity in breast cancer cells. CONCLUSIONS We found that the EGCG could be used as an agent for blocking smoking (Nic)- or hormone (E2)-induced breast cancer cell proliferation by inhibiting of α9-nAChR signaling pathway. This study reveals the novel antitumor mechanisms of EGCG, and these results may have significant applications for chemopreventive purposes in human breast cancer.
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Affiliation(s)
- Shih-Hsin Tu
- Department of Surgery, Cathay General Hospital, Taipei, Taiwan
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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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Chen YL, Duan J, Jiang YM, Shi J, Peng L, Xue S, Kakuda Y. Production, Quality, and Biological Effects of Oolong Tea (Camellia sinensis). FOOD REVIEWS INTERNATIONAL 2010. [DOI: 10.1080/87559129.2010.518294] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yu Long Chen
- a South China Botanical Garden , Chinese Academy of Sciences , Guangzhou , The People's Republic of China
| | - Jun Duan
- a South China Botanical Garden , Chinese Academy of Sciences , Guangzhou , The People's Republic of China
| | - Yue Ming Jiang
- a South China Botanical Garden , Chinese Academy of Sciences , Guangzhou , The People's Republic of China
| | - John Shi
- b Guelph Food Research Center , Agriculture and Agri-Food Canada , Guelph , Ontario , Canada
| | - Litao Peng
- c College of Food Science and Technology , Huazhong Agricultural University , Wuhan , The People's Republic of China
| | - Sophia Xue
- b Guelph Food Research Center , Agriculture and Agri-Food Canada , Guelph , Ontario , Canada
| | - Yukio Kakuda
- d Department of Food Science , University of Guelph , Guelph , Ontario , Canada
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Jesnowski R, Isaksson B, Möhrcke C, Bertsch C, Bulajic M, Schneider-Brachert W, Klöppel G, Lowenfels AB, Maisonneuve P, Löhr JM. Helicobacter pylori in autoimmune pancreatitis and pancreatic carcinoma. Pancreatology 2010; 10:462-6. [PMID: 20720447 DOI: 10.1159/000264677] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Accepted: 10/16/2009] [Indexed: 12/11/2022]
Abstract
BACKGROUND Helicobacter pylori has been suggested to be involved in pancreatic diseases, namely autoimmune pancreatitis and pancreatic carcinoma. We investigated the presence of conserved sequences of Helicobacter in pancreatic tissue and pancreatic juice from patients with chronic nonautoimmune and autoimmune pancreatitis as well as pancreatic ductal adenocarcinoma (PDAC). METHODS 35 pancreatic juices collected during routine endoscopic retrograde cholangiopancreatography and 30 pancreatic tissues were studied. Nested PCR was used to detect H. pylori in the isolated DNA samples. In order to exclude a methodological bias, the samples were analyzed blindly in 2 different laboratories using either conventional or LightCycler PCR for H. pylori urease A and 16S ribosomal DNA. RESULTS In the pancreas of 11 patients with autoimmune pancreatitis, no H. pylori DNA could be detected. Further, in none of the other tissue samples of chronic pancreatitis or PDAC could we detect any Helicobacter sequences. Out of the pancreatic juice samples, none demonstrated either of the 2 Helicobacter gene sequences investigated. CONCLUSION Despite good scientific reasoning for an involvement of Helicobacter in pancreatic diseases, a direct infection of the microbial agent seems unlikely. Rather, the pathomechanism must involve molecular mimicry in autoimmune pancreatitis, or the transformation of nitric food constituents to nitrosamines in pancreatic cancer. and IAP.
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Affiliation(s)
- Ralf Jesnowski
- Molecular Gastroenterology G350, DKFZ Heidelberg, Heidelberg, Germany
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Lee JM, Chen MG, Hwang TC, Yeh CY. Effect of cigarette taxes on the consumption of cigarettes, alcohol, tea and coffee in Taiwan. Public Health 2010; 124:429-36. [PMID: 20655077 DOI: 10.1016/j.puhe.2010.04.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2009] [Revised: 02/26/2010] [Accepted: 04/20/2010] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To analyse whether a health tax of 10 New Taiwan Dollars (NT$) (US$0.3) imposed on cigarettes in 2009 will help to reduce cigarette consumption, and whether or not the cigarette tax will affect consumption of alcohol, coffee and tea. STUDY DESIGN Time series data for consumption and retail prices of tobacco, alcohol, tea and coffee were collected and analysed for the period 1973-2007. METHODS To establish the Central Bureau of Statistics demand function to estimate the overall demand price elasticities of cigarettes, alcohol, tea and coffee, a seemingly unrelated regression analysis was used. The independent variables were annual consumption of cigarettes, alcohol, tea and coffee. The dependent variables were prices of and expenditures on cigarettes, alcohol, tea and coffee. RESULTS The estimated own-price elasticities for cigarettes and alcohol are close to -0.726. The own-price elasticities for tea and coffee are less than those for cigarettes and alcohol. Hence, it is predicted that the NT$10 health tax on cigarettes will reduce cigarette consumption by a significant 13.19%. Analysis of cross-price elasticity reveals that alcohol is complementary to cigarettes. CONCLUSIONS Taxation is an effective smoking control policy tool that not only helps to reduce consumption of cigarettes, but also reduces consumption of alcoholic beverages.
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Affiliation(s)
- J M Lee
- Department of Logistic Management, National Kaohsiung Marine University, Nan-Tzu, Kaohsiung, Taiwan, ROC
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Kaushik G, Satya S, Naik SN. Green tea: protective action against oxidative damage induced by xenobiotics. MEDITERRANEAN JOURNAL OF NUTRITION AND METABOLISM 2010. [DOI: 10.1007/s12349-010-0014-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Nader MA, El-Agamy DS, Suddek GM. Protective effects of propolis and thymoquinone on development of atherosclerosis in cholesterol-fed rabbits. Arch Pharm Res 2010; 33:637-43. [DOI: 10.1007/s12272-010-0420-1] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Revised: 01/02/2010] [Accepted: 03/04/2010] [Indexed: 11/30/2022]
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Kalili KM, de Villiers A. Off-line comprehensive two-dimensional hydrophilic interaction×reversed phase liquid chromatographic analysis of green tea phenolics. J Sep Sci 2010; 33:853-63. [DOI: 10.1002/jssc.200900673] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ayoub S, Melzig MF. Induction of neutral endopeptidase (NEP) activity of SK-N-SH cells by natural compounds from green tea. J Pharm Pharmacol 2010; 58:495-501. [PMID: 16597367 DOI: 10.1211/jpp.58.4.0009] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Deposition of amyloid β-peptide as senile plaques in the brain is one of the neuropathological hallmarks of Alzheimer's disease, which is the most prevalent progressive neurodegenerative disease leading to dementia. Neutral endopeptidase is one of the major β-amyloid-degrading enzymes in the brain. To examine the influence of different polyphenols and other natural products from green tea extract (from Camellia sinensis, Theaceae), we used the neuroblastoma cell line SK-N-SH and studied the changes in the specific cellular neutral endopeptidase activity after long-term treatment with these substances. We have shown that caffeine leads to an increase in specific cellular neutral endopeptidase activity more than theophylline, theobromine or theanine. We have also shown that the combination of epicatechin, epigallocatechin and epigallocatechingallate with caffeine, theobromine or theophylline induced cellular neutral endopeptidase activity. It is suggested that the enhancement of cellular neutral endopeptidase activity by green tea extract and its natural products might be correlated with an elevated level of intracellular cyclic adenosine monophosphate.
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Affiliation(s)
- Shereen Ayoub
- Institut für Pharmazie, Freie Universität Berlin, Königin-Luise-Str. 2-4, 14195 Berlin, Germany
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Lee JS, Kim HW, Chung D, Lee HG. Catechin-loaded calcium pectinate microparticles reinforced with liposome and hydroxypropylmethylcellulose: Optimization and in vivo antioxidant activity. Food Hydrocoll 2009. [DOI: 10.1016/j.foodhyd.2009.05.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Prevention of oxidative DNA damage in inner organs and lymphocytes of rats by green tea extract. Eur J Nutr 2009; 49:227-34. [PMID: 19851801 DOI: 10.1007/s00394-009-0068-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2009] [Accepted: 10/07/2009] [Indexed: 02/07/2023]
Abstract
BACKGROUND Consumption of green tea (GT) is associated with decreased incidences of specific forms of cancer in humans and it was postulated that its antioxidant (AO) properties may account for these effects. The evidence for AO effects of GT is mainly based on the results from in vitro experiments and on animal studies in which protection against chemically induced damage was monitored. AIM OF THE STUDY The goal of the study was the investigation of the prevention of strand breaks and DNA migration attributable to endogenous oxidation of bases by GT extract (GTE) in inner organs and lymphocytes of untreated rats. In addition, immunological parameters and biochemical markers were monitored. METHODS DNA migration was measured in hepatocytes, colonocytes and lymphocytes after consumption of a low (1.3 mg/kg bw per day, 5 days) and a high dose (6.5 mg/kg bw per day, 5 days) of GTE in COMET assays (n = 5 animals per group). In addition, immunological parameters (TNF-alpha, IFN-gamma, IL-4 and IL-10), the total AO capacity and oxidized low-density lipoproteins were determined in plasma. RESULTS No evidence for reduction in DNA damage was found with a lower dose, whereas with the higher dose, reduction in DNA migration attributable to formamidopyrimidine-DNA-glycosylase sensitive lesions (oxidized purines) and endonuclease III-sensitive sites (oxidized pyrimidines) (58 and 73%) was observed in lymphocytes; also, in colonocytes (reduction in FPG-sensitive sites by 46%) and hepatocytes (decrease in Endo III-sensitive sites by 74%) protective effects were found, while none of the other parameters was altered. CONCLUSIONS Our results show that a dose of GTE, which is equivalent to consumption of 500 ml GT/p/day in humans protects lymphocytes and to a lesser extent inner organs against oxidative DNA damage, while no effect was seen with a lower dose corresponding to an uptake of 100 ml/p/day.
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