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Silva M, Brand A, Novaes F, Rezende C. Cafestol, Kahweol and Their Acylated Derivatives: Antitumor Potential, Pharmacokinetics, and Chemopreventive Profile. FOOD REVIEWS INTERNATIONAL 2022. [DOI: 10.1080/87559129.2022.2141776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- M.A.E. Silva
- Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - A.L.M. Brand
- Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - F.J.M. Novaes
- Chemistry Department, Federal University of Viçosa, Viçosa, Brazil
| | - C.M Rezende
- Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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The metabolism and biotransformation of AFB 1: Key enzymes and pathways. Biochem Pharmacol 2022; 199:115005. [PMID: 35318037 DOI: 10.1016/j.bcp.2022.115005] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/11/2022] [Accepted: 03/14/2022] [Indexed: 02/05/2023]
Abstract
Aflatoxins B1 (AFB1) is a hepatoxic compound produced by Aspergillus flavus and Aspergillus parasiticus, seriously threatening food safety and the health of humans and animals. Understanding the metabolism of AFB1 is important for developing detoxification and intervention strategies. In this review, we summarize the AFB1 metabolic fates in humans and animals and the key enzymes that metabolize AFB1, including cytochrome P450s (CYP450s) for AFB1 bioactivation, glutathione-S-transferases (GSTs) and aflatoxin-aldehyde reductases (AFARs) in detoxification. Furthermore, AFB1 metabolism in microbes is also summarized. Microorganisms specifically and efficiently transform AFB1 into less or non-toxic products in an environmental-friendly approach which could be the most desirable detoxification strategy in the future. This review provides a wholistic insight into the metabolism and biotransformation of AFB1 in various organisms, which also benefits the development of protective strategies in humans and animals.
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Fan T, Xie Y, Ma W. Research progress on the protection and detoxification of phytochemicals against aflatoxin B 1-Induced liver toxicity. Toxicon 2021; 195:58-68. [PMID: 33716068 DOI: 10.1016/j.toxicon.2021.03.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 03/03/2021] [Accepted: 03/08/2021] [Indexed: 02/06/2023]
Abstract
Aflatoxin B1 (AFB1) is a potent hepatotoxic toxin, which can cause hepatitis, cirrhosis, and liver immunological damage. It has been involved in the etiology of human hepatocellular carcinoma. AFB1 can cause oxidative stress in the body's metabolism process, and then cause cytotoxicity, such as apoptosis and DNA damage. Scientific research has discovered that phytochemicals can induce the detoxification pathway of AFB1 through its biotransformation, thereby reducing the damage of AFB1 to the human body. In clinical treatment, certain phytochemicals have been effectively used in the treatment of liver injury due to the advantages of multiple targets, multiple pathways, low toxicity and side effects. Therefore, the article summarizes the toxic mechanism of AFB1-induced hepatoxicity, and the related research progress of phytochemicals for preventing and treating its cytotoxicity and genotoxicity. We also look forward to the existing problems and application prospects of phytochemicals in the pharmaceutical industry, in order to provide theoretical reference for the prevention and treatment of AFB1 poisoning in future research work.
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Affiliation(s)
- Tingting Fan
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, People's Republic of China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, People's Republic of China
| | - Yanli Xie
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, People's Republic of China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Weibin Ma
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, 450001, People's Republic of China; Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, Henan, 450001, People's Republic of China
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Ismail T, Donati-Zeppa S, Akhtar S, Turrini E, Layla A, Sestili P, Fimognari C. Coffee in cancer chemoprevention: an updated review. Expert Opin Drug Metab Toxicol 2020; 17:69-85. [PMID: 33074040 DOI: 10.1080/17425255.2021.1839412] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Chemoprevention of cancer refers to the use of natural or synthetic compounds to abolish or perturb a variety of steps in tumor initiation, promotion, and progression. This can be realized through different mechanisms, including activation of free radical scavenging enzymes, control of chronic inflammation, and downregulation of specific signaling pathways. AREAS COVERED The goal of this article is to critically review recent evidence on association between coffee and prevention of different types of cancer, with particular emphasis on the molecular mechanisms and the bioactive compounds involved in its anticancer activity. EXPERT OPINION Coffee is a mixture of different compounds able to decrease the risk of many types of cancer. However, its potential anticancer activity is not completely understood. Hundreds of biologically active components such as caffeine, chlorogenic acid, diterpenes are contained in coffee. Further research is needed to fully elucidate the molecular mechanisms underlying the anticancer effects of coffee and fully understand the role of different confounding factors playing a role in its reported anticancer activity.
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Affiliation(s)
- Tariq Ismail
- Institute of Food Science & Nutrition, Bahauddin Zakariya University , Multan, Pakistan
| | - Sabrina Donati-Zeppa
- Department of Biomolecular Sciences (DISB), Università Degli Studi Di Urbino Carlo Bo , Urbino, Italy
| | - Saeed Akhtar
- Institute of Food Science & Nutrition, Bahauddin Zakariya University , Multan, Pakistan
| | - Eleonora Turrini
- Department for Life Quality Studies, Alma Mater Studiorum - Università Di Bologna , Rimini, Italy
| | - Anam Layla
- National Institute of Food Science & Technology, University of Agriculture Faisalabad , Faisalabad, Pakistan
| | - Piero Sestili
- Department of Biomolecular Sciences (DISB), Università Degli Studi Di Urbino Carlo Bo , Urbino, Italy
| | - Carmela Fimognari
- Department for Life Quality Studies, Alma Mater Studiorum - Università Di Bologna , Rimini, Italy
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Development of an integrated one-pot process for the production and impregnation of starch aerogels in supercritical carbon dioxide. J Supercrit Fluids 2019. [DOI: 10.1016/j.supflu.2019.104592] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Yoon CS, Kim MK, Kim YS, Lee SK. In vivo protein expression changes in mouse livers treated with dialyzed coffee extract as determined by IP-HPLC. Maxillofac Plast Reconstr Surg 2018; 40:44. [PMID: 30613574 PMCID: PMC6308107 DOI: 10.1186/s40902-018-0183-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Accepted: 11/26/2018] [Indexed: 02/06/2023] Open
Abstract
Background Coffee extract has been investigated by many authors, and many minor components of coffee are known, such as polyphenols, diterpenes (kahweol and cafestol), melanoidins, and trigonelline, to have anti-inflammatory, anti-oxidant, anti-angiogenic, anticancer, chemoprotective, and hepatoprotective effects. Therefore, it is necessary to know its pharmacological effect on hepatocytes which show the most active cellular regeneration in body. Methods In order to determine whether coffee extract has a beneficial effect on the liver, 20 C57BL/6J mice were intraperitoneally injected once with dialyzed coffee extract (DCE)-2.5 (equivalent to 2.5 cups of coffee a day in man), DCE-5, or DCE-10, or normal saline (control), and then followed by histological observation and IP-HPLC (immunoprecipitation high performance liquid chromatography) over 24 h. Results Mice treated with DCE-2.5 or DCE-5 showed markedly hypertrophic hepatocytes with eosinophilic cytoplasms, while those treated with DCE-10 showed slightly hypertrophic hepatocytes, which were well aligned in hepatic cords with increased sinusoidal spaces. DCE induced the upregulations of cellular proliferation, growth factor/RAS signaling, cellular protection, p53-mediated apoptosis, angiogenesis, and antioxidant and protection-related proteins, and the downregulations of NFkB signaling proteins, inflammatory proteins, and oncogenic proteins in mouse livers. These protein expression changes induced by DCE were usually limited to the range ± 10%, suggesting murine hepatocytes were safely reactive to DCE within the threshold of physiological homeostasis. DCE-2.5 and DCE-5 induced relatively mild dose-dependent changes in protein expressions for cellular regeneration and de novo angiogenesis as compared with non-treated controls, whereas DCE-10 induced fluctuations in protein expressions. Conclusion These observations suggested that DCE-2.5 and DCE-5 were safer and more beneficial to murine hepatocytes than DCE-10. It was also found that murine hepatocytes treated with DCE showed mild p53-mediated apoptosis, followed by cellular proliferation and growth devoid of fibrosis signaling (as determined by IP-HPLC), and subsequently progressed to rapid cellular regeneration and wound healing in the absence of any inflammatory reaction based on histologic observations. Electronic supplementary material The online version of this article (10.1186/s40902-018-0183-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Cheol Soo Yoon
- 1Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University and Institute of Oral Science, 123 Chibyun-dong, Gangneung, 210-702 South Korea
| | - Min Keun Kim
- 2Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University and Institute of Oral Science, Gangneung, South Korea
| | - Yeon Sook Kim
- 3Department of Dental Hygiene, College of Health Sciences, Cheongju University, Cheongju, South Korea
| | - Suk Keun Lee
- 1Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University and Institute of Oral Science, 123 Chibyun-dong, Gangneung, 210-702 South Korea
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Yoon CS, Kim MK, Kim YS, Lee SK. In vitro protein expression changes in RAW 264.7 cells and HUVECs treated with dialyzed coffee extract by immunoprecipitation high performance liquid chromatography. Sci Rep 2018; 8:13841. [PMID: 30218035 PMCID: PMC6138699 DOI: 10.1038/s41598-018-32014-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 08/31/2018] [Indexed: 12/15/2022] Open
Abstract
RAW 264.7 cells and HUVECs were compared to evaluate the effects of dialyzed coffee extract (DCE) and artificial coffee (AC). Immunoprecipitation high performance liquid chromatography (IP-HPLC) showed DCE-2.5- (equivalent to 2.5 cups of coffee a day) and DCE-5-induced protein expression that was beneficial to human health, i.e., they led to significant increases in proliferation-, immunity-, cellular protection-, antioxidant signaling-, and osteogenesis-related proteins but decreases in inflammation-, NFkB signaling-, cellular apoptosis-, and oncogenic signaling-related proteins in RAW 264.7 cells, and slight decreases in angiogenesis-related proteins in HUVECs. These protein expression changes were less frequently observed for DCE-10 treatment, while AC treatment induced very different changes in protein expression. We suggest that the favorable cellular effects of DCE were derived from minor coffee elements that were absent in AC, and that the reduced effects of DCE-10 compared with those of DCE-2.5 or DCE-5 might have been caused by greater adverse reactions to caffeine and chlorogenic acid in DCE-10 than DCE-2.5 or DCE-5. IP-HPLC results suggested that minor coffee elements in DCE might play beneficial roles in the global protein expression of proliferation-, immunity-, anti-inflammation-, cell protection-, antioxidant-, anti-apoptosis-, anti-oncogenesis-, and osteogenesis-related proteins in RAW 264.7 cells and enhance anti-angiogenic signaling in HUVECs.
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Affiliation(s)
- Cheol Soo Yoon
- Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University, and Institute of Oral Science, Gangneung, Korea
| | - Min Keun Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, and Institute of Oral Science, Gangneung, Korea
| | - Yeon Sook Kim
- Department of Dental Hygiene, College of Health Sciences, Cheongju University, Cheongju, Korea
| | - Suk Keun Lee
- Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University, and Institute of Oral Science, Gangneung, Korea.
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Alves JM, Leandro LF, Senedese JM, Castro PTD, Pereira DE, Resende FA, Campos DL, Silva JJMD, Varanda EA, Bastos JK, Ambrósio SR, Tavares DC. Antigenotoxicity properties of Copaifera multijuga oleoresin and its chemical marker, the diterpene (-)-copalic acid. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 81:116-129. [PMID: 29286884 DOI: 10.1080/15287394.2017.1420505] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 12/19/2017] [Indexed: 06/07/2023]
Abstract
UNLABELLED In view of the biological activities and growing therapeutic interest in oleoresin obtained from Copaifera multijuga, this study aimed to determine the genotoxic and antigenotoxic potential of this oleoresin (CMO) and its chemical marker, diterpene (-)-copalic acid (CA). The micronucleus (MN) assay in V79 cell cultures and the Ames test were used for in vitro analyses, as well as MN and comet assays in Swiss mice for in vivo analyses. The in vitro genotoxicity/mutagenicity results showed that either CMO (30, 60, or 120 µg/ml-MN assay; 0.39-3.12 mg/plate-Ames test) or CA (2.42; 4.84, or 9.7 µg/ml-MN assay; 0.39-3.12 mg/plate-Ames test) did not induce a significant effect on the frequency of MN and number of revertants, demonstrating an absence of genotoxic and mutagenic activities, respectively, in vitro. In contrast, these natural products significantly reduced the frequency of MN induced by methyl methanesulfonate (MMS), and exerted a marked inhibitory effect against indirect-acting mutagens in the Ames test. In the in vivo test system, animals treated with CMO (6.25 mg/kg b.w.) exhibited a significant decrease in rate of MN occurrence compared to those treated only with MMS. An antigenotoxic effect of CA was noted in the MN test (1 and 2 mg/kg b.w.) and the comet assay (0.5 mg/kg b.w.). Data suggest that the chemical marker of the genus Copaifera, CA, may partially be responsible for the observed chemopreventive effect attributed to CMO exposure. ABBREVIATIONS 2-AA, 2-anthramine; 2-AF, 2-aminofluorene; AFB1, aflatoxin B1; B[a]P, benzo[a]pyrene; BOD, biological oxygen demand; BPDE, benzo[a]pyrene-7,8-diol-9,10-epoxide; CA, (-)-copalic acid; CMO, oleoresin of Copaifera multijuga, DMEM, Dulbecco`s Modified Eagles`s Medium; DMSO, dimethylsulfoxide; EMBRAPA, Brazilian agricultural research corporation; GC-MS, gas chromatography-mass spectrometry; HAM-F10, nutrient mixture F-10 Ham; HPLC, high performance liquid chromatography; LC-MS, liquid chromatography-mass spectrometry; MI, mutagenic index; MMC, mitomycin C; MMS, methyl methanesulfonate; MN, micronucleus; MNPCE, micronucleated polychromatic erythrocyte; NCE, normochromatic erythrocyte; NDI, nuclear division index; NMR, nuclear magnetic resonance; NPD, 4-nitro-o-phenylenediamine; PBS, phosphate-buffered saline; PCE, polychromatic erythrocyte; SA, sodium azide; V79, Chinese hamster lung fibroblast.
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Affiliation(s)
| | | | | | | | | | - Flávia Aparecida Resende
- b Grupo de Pesquisa em Química Medicinal e Medicina Regenerativa Universidade de Araraquara , Araraquara , São Paulo , Brazil
| | - Débora Leite Campos
- c Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas de Araraquara , Universidade Estadual Paulista , Araraquara , São Paulo , Brazil
| | - Jonas Joaquim Mangabeira da Silva
- d Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto , Universidade de São Paulo , Ribeirão Preto , São Paulo , Brazil
| | - Eliana Aparecida Varanda
- c Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas de Araraquara , Universidade Estadual Paulista , Araraquara , São Paulo , Brazil
| | - Jairo Kenupp Bastos
- d Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto , Universidade de São Paulo , Ribeirão Preto , São Paulo , Brazil
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Cornelio-Santiago HP, Gonçalves CB, de Oliveira NA, de Oliveira AL. Supercritical CO 2 extraction of oil from green coffee beans: Solubility, triacylglycerol composition, thermophysical properties and thermodynamic modelling. J Supercrit Fluids 2017. [DOI: 10.1016/j.supflu.2017.05.030] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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10
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Amer MG, Mazen NF, Mohamed AM. Caffeine intake decreases oxidative stress and inflammatory biomarkers in experimental liver diseases induced by thioacetamide: Biochemical and histological study. Int J Immunopathol Pharmacol 2017; 30:13-24. [PMID: 28281876 PMCID: PMC5806787 DOI: 10.1177/0394632017694898] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Liver disease remains a significant global health problem. Increased caffeine consumption has been associated with a lower prevalence of chronic liver disease. This study aimed to investigate the modifying effects of caffeine on liver injury induced by thioacetamide (TAA) administration in male rats and the possible underlying mechanisms. Forty adult male rats were equally classified into four groups: control group, received only tap water; caffeine-treated group, received caffeine (37.5 mg/kg per day); TAA-treated group, received intraperitoneal (i.p.) TAA (200 mg/kg b.w.) twice a week; and caffeine + TAA-treated group, received combined TAA and caffeine in the same previous doses. After eight weeks of treatment, blood samples were collected for biochemical analysis and liver specimens were prepared for histological and immunohistochemical studies and for assessment of oxidative stress. TAA induced liver toxicity with elevated liver enzymes and histological alterations, fatty changes, apoptosis, and fibrosis evidenced by increased immunohistochemical reaction to matrix metalloproteinase-9 (MMP-9) and collagen type IV in hepatocytes. Also, the levels of pro-inflammatory cytokines (TNF-α, IL-1β, and IL-6) in serum were significantly elevated. Co-treatment with caffeine and TAA restored normal liver structure and function. Caffeine provided an anti-fibrogenic, anti-inflammatory, and antioxidant effect that was associated with recovery of hepatic histological and functional alterations from TAA-induced hepatotoxicity.
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Affiliation(s)
- Mona G Amer
- 1 Department of Histology & Cell Biology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Nehad F Mazen
- 1 Department of Histology & Cell Biology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ahmed M Mohamed
- 2 Department of Medical Pharmacology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Bai K, Cai Q, Jiang Y, Lv L. Coffee consumption and risk of hepatocellular carcinoma: a meta-analysis of eleven epidemiological studies. Onco Targets Ther 2016; 9:4369-75. [PMID: 27499631 PMCID: PMC4959413 DOI: 10.2147/ott.s109656] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Growing evidence has shown that coffee consumption is inversely related with the risk of hepatocellular carcinoma. It is suggested that caffeine maintains strong antioxidative activity. With this property, coffee intake may lead to the inhibition of cell proliferation of liver cancer cells; also, some compounds contained in coffee can reduce the genotoxicity of aflatoxin B1 in vitro and lower the damage caused by some carcinogens. A computerized search was performed in PubMed to identify relevant articles published before August 2015. Eleven relevant studies were included with a total of 2,795 cases and 340,749 control subjects. According to the meta-analysis we performed, the pooled odds ratio (OR) from all included studies was 0.49 (95% confidence interval [CI] =0.46–0.52). The subgroup analysis indicated that the pooled ORs for Asian studies and other populations were 0.27 (95% CI =0.23–0.31) and 0.82 (95% CI =0.77–0.87), respectively. The overall pooled OR for high consumption was decreased to 0.21 (95% CI =0.18–0.25) and significance was observed. Among other populations, the pooled OR of subjects with high coffee consumption was 0.65 (95% CI =0.56–0.73) compared to the nondrinker. The corresponding OR of five Asian studies was 0.13 (95% CI =0.09–0.17). The findings from this meta-analysis further confirmed the inverse association between the coffee consumption and hepatocellular carcinoma risk with quantitative evidence. The protective effect can be detected among healthy population and patients with chronic liver diseases, and the consumption can also prevent the development of liver cirrhosis.
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Affiliation(s)
- Kai Bai
- Department of Hepatobiliary Surgery, Fuzong Clinical College, Fujian Medical University, Fuzhou, People's Republic of China
| | - Qiucheng Cai
- Department of Hepatobiliary Surgery, Fuzong Clinical College, Fujian Medical University, Fuzhou, People's Republic of China
| | - Yi Jiang
- Department of Hepatobiliary Surgery, Fuzong Clinical College, Fujian Medical University, Fuzhou, People's Republic of China
| | - Lizhi Lv
- Department of Hepatobiliary Surgery, Fuzong Clinical College, Fujian Medical University, Fuzhou, People's Republic of China
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Liu JJ, Crous-Bou M, Giovannucci E, De Vivo I. Coffee Consumption Is Positively Associated with Longer Leukocyte Telomere Length in the Nurses' Health Study. J Nutr 2016; 146:1373-8. [PMID: 27281805 PMCID: PMC4926853 DOI: 10.3945/jn.116.230490] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 05/04/2016] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Coffee is an important source of antioxidants, and consumption of this beverage is associated with many health conditions and a lower mortality risk. However, no study, to our knowledge, has examined whether varying coffee or caffeine consumption levels are associated with telomere length, a biomarker of aging whose shortening can be accelerated by oxidative stress. OBJECTIVE We performed a large comprehensive study on how coffee consumption is associated with telomere length. METHODS We used data from the Nurses' Health Study (NHS), a prospective cohort study of female nurses that began in 1976. We examined the cross-sectional association between coffee consumption and telomere length in 4780 women from the NHS. Coffee consumption information was obtained from validated food-frequency questionnaires, and relative telomere length was measured in peripheral blood leukocytes by the quantitative real-time polymerase chain reaction. Unconditional logistic regression was used to obtain ORs when the telomere length outcome was dichotomized at the median. Linear regression was used for tests of trend with coffee consumption and telomere length as continuous variables. RESULTS Higher total coffee consumption was significantly associated with longer telomeres after potential confounding adjustment. Compared with non-coffee drinkers, multivariable ORs for those drinking 2 to <3 and ≥3 cups of coffee/d were, respectively, 1.29 (95% CI: 0.99, 1.68) and 1.36 (95% CI: 1.04, 1.78) (P-trend = 0.02). We found a significant linear association between caffeine consumption from all dietary sources and telomere length (P-trend = 0.02) after adjusting for potential confounders, but not after additionally adjusting for total coffee consumption (P-trend = 0.37). CONCLUSIONS We found that higher coffee consumption is associated with longer telomeres among female nurses. Future studies are needed to better understand the influence of coffee consumption on telomeres, which may uncover new knowledge of how coffee consumption affects health and longevity.
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Affiliation(s)
- Jason J Liu
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD
| | - Marta Crous-Bou
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA; and,Departments of Epidemiology and
| | - Edward Giovannucci
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA; and,Departments of Epidemiology and,Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Immaculata De Vivo
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Departments of Epidemiology and
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Coffee consumption, obesity and type 2 diabetes: a mini-review. Eur J Nutr 2016; 55:1345-58. [DOI: 10.1007/s00394-016-1206-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 03/15/2016] [Indexed: 10/22/2022]
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Involvement of endogenous opioid peptides in the peripheral antinociceptive effect induced by the coffee specific diterpene kahweol. Pharmacol Rep 2015; 67:1010-5. [DOI: 10.1016/j.pharep.2015.02.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 02/19/2015] [Accepted: 02/23/2015] [Indexed: 11/23/2022]
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de Oliveira PMA, de Almeida RH, de Oliveira NA, Bostyn S, Gonçalves CB, de Oliveira AL. Enrichment of diterpenes in green coffee oil using supercritical fluid extraction – Characterization and comparison with green coffee oil from pressing. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2014.08.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Saab S, Mallam D, Cox GA, Tong MJ. Impact of coffee on liver diseases: a systematic review. Liver Int 2014; 34:495-504. [PMID: 24102757 DOI: 10.1111/liv.12304] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 08/05/2013] [Indexed: 12/24/2022]
Abstract
Coffee is one of the most commonly consumed beverages in the world. Its health benefits including improved overall survival have been demonstrated in a variety of disease states. To examine the association of coffee consumption with liver disease, a systematic review of studies on the effects of coffee on liver associated laboratory tests, viral hepatitis, nonalcoholic fatty liver disease (NAFLD), cirrhosis and hepatocellular carcinoma (HCC) was performed. Coffee consumption was associated with improved serum gamma glutamyltransferase, aspartate aminotransferase and alanine aminotransferase values in a dose dependent manner in individuals at risk for liver disease. In chronic liver disease patients who consume coffee, a decreased risk of progression to cirrhosis, a lowered mortality rate in cirrhosis patients, and a lowered rate of HCC development were observed. In chronic hepatitis C patients, coffee was associated with improved virologic responses to antiviral therapy. Moreover, coffee consumption was inversely related to the severity of steatohepatitis in patients with non-alcoholic fatty liver disease. Therefore, in patients with chronic liver disease, daily coffee consumption should be encouraged.
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Affiliation(s)
- Sammy Saab
- Department of Medicine, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, CA, USA; Department of Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, CA, USA
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Turner PC. The molecular epidemiology of chronic aflatoxin driven impaired child growth. SCIENTIFICA 2013; 2013:152879. [PMID: 24455429 PMCID: PMC3881689 DOI: 10.1155/2013/152879] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Accepted: 10/27/2013] [Indexed: 06/03/2023]
Abstract
Aflatoxins are toxic secondary fungal metabolites that contaminate dietary staples in tropical regions; chronic high levels of exposure are common for many of the poorest populations. Observations in animals indicate that growth and/or food utilization are adversely affected by aflatoxins. This review highlights the development of validated exposure biomarkers and their use here to assess the role of aflatoxins in early life growth retardation. Aflatoxin exposure occurs in utero and continues in early infancy as weaning foods are introduced. Using aflatoxin-albumin exposure biomarkers, five major studies clearly demonstrate strong dose response relationships between exposure in utero and/or early infancy and growth retardation, identified by reduced birth weight and/or low HAZ and WAZ scores. The epidemiological studies include cross-sectional and longitudinal surveys, though aflatoxin reduction intervention studies are now required to further support these data and guide sustainable options to reduce the burden of exposure. The use of aflatoxin exposure biomarkers was essential in understanding the observational data reviewed and will likely be a critical monitor of the effectiveness of interventions to restrict aflatoxin exposure. Given that an estimated 4.5 billion individuals live in regions at risk of dietary contamination the public health concern cannot be over stated.
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Affiliation(s)
- Paul Craig Turner
- Maryland Institute for Applied Environmental Health, School of Public Health, University of Maryland, College Park, MD 20742, USA
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El-Gengaihi SE, Hamed MA, Khalaf-Allah AERM, Mohammed MA. Golden Berry Juice Attenuates the Severity of Hepatorenal Injury. J Diet Suppl 2013; 10:357-69. [DOI: 10.3109/19390211.2013.830675] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Brinda R, Vijayanandraj S, Uma D, Malathi D, Paranidharan V, Velazhahan R. Role of Adhatoda vasica (L.) Nees leaf extract in the prevention of aflatoxin-induced toxicity in Wistar rats. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2013; 93:2743-2748. [PMID: 23519623 DOI: 10.1002/jsfa.6093] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 01/22/2013] [Accepted: 02/08/2013] [Indexed: 06/01/2023]
Abstract
BACKGROUND Aflatoxin contamination of various foodstuffs and agricultural commodities is a major problem worldwide. Several strategies have been reported for the detoxification of aflatoxins in contaminated foods and feeds, but all these methods have their own shortcomings. Traditional medicinal plants are potential sources of aflatoxin-detoxifying compounds. In this study a spray-dried formulation of Adhatoda vasica (L.) Nees leaf extract was prepared and its chemopreventive effect on aflatoxin B1 (AFB1)-induced biochemical changes in the liver and serum of Wistar rats was investigated. RESULTS Administration of AFB1 (1.5 mg kg(-1) body weight (BW) intraperitoneally) to rats significantly reduced the activities of superoxide dismutase and catalase in liver tissues and increased the activities of aspartate aminotransferase, alanine aminotransferase and alkaline phosphatase and the levels of very-low-density lipoprotein, low-density lipoprotein and cholesterol in blood serum. However, pre-feeding of rats with A. vasica formulation (500 mg kg(-1) BW for 7 days) protected the animals from AFB1-induced biochemical changes during subsequent exposure to AFB1. CONCLUSION Pre-feeding of rats with A. vasica formulation counteracted the hepatic dysfunction induced by subsequent treatment with AFB1. This formulated A. vasica extract offers a biologically safe alternative to detoxify aflatoxin and has huge potential to be used in the poultry industry to reduce aflatoxicosis.
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Affiliation(s)
- Rajendran Brinda
- Department of Food and Agricultural Processing Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
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Baer-Dubowska W, Szaefer H. Modulation of carcinogen-metabolizing cytochromes P450 by phytochemicals in humans. Expert Opin Drug Metab Toxicol 2013; 9:927-41. [PMID: 23634851 DOI: 10.1517/17425255.2013.795219] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Cytochrome P450 (CYP) families 1 - 3, besides oxidizing environmental and dietary chemicals, leading to their elimination, catalyze the bioactivation of exogenous as well as endogenous carcinogens. Phytochemicals, particularly those which are active food components, were shown to be able to affect specific CYP expression and/or activity in animal models and in human in vitro systems. Human intervention studies involving healthy volunteers were also performed. This review describes human CYP modulation by naturally occurring phytochemicals which can not only affect carcinogen metabolism in humans, but also change the drug response. AREAS COVERED The authors present an overview of carcinogens metabolizing human CYP modulation in different model systems as well as studies on human dietary intervention. Furthermore, the authors provide examples of the phytochemicals that affect CYP expression and activity. EXPERT OPINION CYP, which are involved in carcinogen activation, can metabolize a range of substrates and inducing CYP by one substrate may also increase the metabolism of another. The ultimate proof of the efficacy of CYP modulation strategy for chemoprevention may be provided by clinical trials involving risk populations, which are difficult to perform. The new human-like models are highly desired for the study of modulation of carcinogen-metabolizing CYP.
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Affiliation(s)
- Wanda Baer-Dubowska
- Poznan University of Medical Sciences, Department of Pharmaceutical Biochemistry, Poznań, Poland.
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Rathod MA, Patel D, Das A, Tipparaju SR, Shinde SS, Anderson RF. Inhibition of radical-induced DNA strand breaks by water-soluble constituents of coffee: phenolics and caffeine metabolites. Free Radic Res 2013; 47:480-7. [DOI: 10.3109/10715762.2013.788167] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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El-Gengaihi SE, Hassan EE, Hamed MA, Zahran HG, Mohammed MA. Chemical Composition and Biological Evaluation ofPhysalis peruvianaRoot as Hepato-renal Protective Agent. J Diet Suppl 2013; 10:39-53. [DOI: 10.3109/19390211.2012.760509] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Foster AJ, Prime LH, Gustafsson F, Temesi DG, Isin EM, Midlöv J, Castagnoli N, Kenna JG. Bioactivation of the Cannabinoid Receptor Antagonist Rimonabant to a Cytotoxic Iminium Ion Metabolite. Chem Res Toxicol 2012; 26:124-35. [DOI: 10.1021/tx300418w] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | | | | | - Emre M. Isin
- CVGI Innovative Medicine DMPK, AstraZeneca, Mölndal 431 83, Sweden
| | - Johanna Midlöv
- CVGI Innovative Medicine DMPK, AstraZeneca, Mölndal 431 83, Sweden
| | - Neal Castagnoli
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
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Kato FH, Viana NI, Santini CB, de Souza CGG, Veneziani RCS, Ambrósio SR, Tavares DC. Assessment of the in vitro and in vivo genotoxic and antigenotoxic effects of pimaradienoic acid in mammalian cells. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2012; 749:87-92. [DOI: 10.1016/j.mrgentox.2012.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 08/31/2012] [Accepted: 09/02/2012] [Indexed: 10/27/2022]
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Liverani E, Rico MC, Garcia AE, Kilpatrick LE, Kunapuli SP. Prasugrel metabolites inhibit neutrophil functions. J Pharmacol Exp Ther 2012; 344:231-43. [PMID: 23097214 DOI: 10.1124/jpet.112.195883] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Clopidogrel and prasugrel belong to a thienopyridine class of oral antiplatelet drugs that, after having been metabolized in the liver, can inhibit platelet function by irreversibly antagonizing the P2Y(12) receptor. Furthermore, thienopyridines influence numerous inflammatory conditions, but their effects on neutrophils have not been evaluated, despite the important role of these cells in inflammation. Therefore, we investigated the effect of prasugrel metabolites on neutrophils to further clarify the role of thienopyridines in inflammation. Interestingly, a prasugrel metabolite mixture, produced in vitro using rat liver microsomes, significantly inhibited N-formyl-methionyl-leucyl-phenylalanine (fMLP)- and platelet-activating factor (PAF)-induced neutrophil activation. More specifically, prasugrel metabolites inhibited neutrophil transmigration, CD16 surface expression, and neutrophil-platelet aggregation. Moreover, prasugrel metabolite pretreatment also significantly decreased fMLP- or PAF-induced extracellular-signal-regulated kinase phosphorylation as well as calcium mobilization. To determine the target of prasugrel in neutrophils, the role of both P2Y(12) and P2Y(13) receptors was studied using specific reversible antagonists, AR-C69931MX and MRS2211, respectively. Neither antagonist had any direct effect on the agonist-induced neutrophil functional responses. Our findings indicate that prasugrel metabolites may directly target neutrophils and inhibit their activation, suggesting a possible explanation for their anti-inflammatory effects previously observed. However, these metabolites do not act through either the P2Y(12) or P2Y(13) receptor in neutrophils.
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Affiliation(s)
- Elisabetta Liverani
- Sol Sherry Thrombosis Research Center, Temple University, MRB, 3420 N. Broad Street, Philadelphia, PA 19140, USA.
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Anantha KCD, Siva RC, Manohar RA. Hepatoprotective effect of biherbal ethanolic extract against paracetamol-induced hepatic damage in albino rats. J Ayurveda Integr Med 2012; 3:198-203. [PMID: 23326091 PMCID: PMC3545240 DOI: 10.4103/0975-9476.104436] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2011] [Revised: 09/21/2011] [Indexed: 11/07/2022] Open
Abstract
AIM The combined hepatoprotective effect of Bi-herbal ethanolic extract (BHEE) was evaluated against paracetamol induced hepatic damage in albino rats. MATERIALS AND METHODS Liver function tests and biochemical parameters were estimated using standard kits. Livers were quickly removed and fixed in 10% formalin and subjected to histopathological studies. RESULTS Ethanolic extract from the leaves of Aerva lanata and leaves of Achyranthes aspera at a dose level of 200 mg/kg, 400mg/kg body weight was administered orally once for 3 days. Substantially elevated serum marker enzymes such as SGOT, SGPT, ALP, due to paracetamol treatment were restored towards normal. Biochemical parameters like total protein, total bilirubin, total cholesterol, triglycerides, and urea were also restored towards normal levels. In addition, BHEE significantly decreased the liver weight of paracetamol intoxicated rats. Silymarin at a dose level of 25 mg/kg used as a standard reference also exhibited significant hepatoprotective activity against paracetamol induced hepatotoxicity. CONCLUSION The results of this study strongly indicate that BHEE has got a potent hepatoprotective action against paracetamol induced hepatic damage in rats.
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Affiliation(s)
| | - Reddy Challa Siva
- Department of Pharmacology, KVSR Siddhartha College of Pharmaceutical Sciences, Vijayawada, Andhra Pradesh, India
| | - Reddy A. Manohar
- Department of Pharmaceutical Chemistry,Shri Vishnu College of Pharmacy, Bhimavaram, India
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Kim HG, Hwang YP, Han EH, Choi JH, Kwon KI, Chung YC, Jeong MH, Jeong TC, Kang W, Jeong HG. The coffee diterpene kahweol inhibits metastasis by modulating expressions of MMPs and VEGF via STAT3 inactivation. Food Chem 2012. [DOI: 10.1016/j.foodchem.2012.02.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Traditional West African pharmacopeia, plants and derived compounds for cancer therapy. Biochem Pharmacol 2012; 84:1225-40. [PMID: 22846603 DOI: 10.1016/j.bcp.2012.07.021] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 07/18/2012] [Accepted: 07/19/2012] [Indexed: 01/30/2023]
Abstract
Traditional pharmacopeia is strongly involved in the continuous search for the well being of African populations. The World Health Organization (WHO) estimates that 80% of the population of developing countries relies on traditional medicine for their primary care needs. Medicinal plants are the major resource of this folk medicine where several species are used for the treatment of diseases with an inflammatory and/or infectious component as it is the case of old wounds, skin diseases and malfunctions affecting internal organs such as liver, lung, prostate and kidney. Many of these pathologies described by practitioners of traditional medicine have similarities with certain cancers, but the lack of training of many of these healers does not allow them to establish a link with cancer. However, ethnobotanical and ethnopharmacological surveys conducted by several researchers allowed to identify plants of interest for cancer treatment. Most scientific investigations on these plants demonstrated an anti-inflammatory or antioxidant effect, and sometimes, antiproliferative and cytotoxic activities against cancer cells were reported as well. The emergence of resistance to cancer chemotherapy has forced researchers to turn to natural products of plant and marine origin. In the West African sub-region, research on natural anti-cancer molecules is still in its infancy stage because of very limited financial resources and the scarcity of adequate technical facilities. However, several plants were investigated for their anticancer properties through north-south or south-south partnerships. In this review, we will review the role of West African traditional pharmacopeia in cancer treatment as well as medicinal plants with anti-cancer properties.
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Babu PS, Krishna V, Maruthi KR, Shankarmurthy K, Babu RK. Evaluation of acute toxicity and hepatoprotective activity of the methanolic extract of Dichrostachys cinerea (Wight and Arn.) leaves. Pharmacognosy Res 2011; 3:40-3. [PMID: 21731394 PMCID: PMC3119270 DOI: 10.4103/0974-8490.79114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Revised: 06/22/2010] [Indexed: 11/11/2022] Open
Abstract
Background: D. cinerea are the chief source of drug compounds that are active against various ailments such as jaundice, inflammations rheumatism, fever, asthma, body ache, chest problems, toothache, ulcers, wounds, eye diseases and have an aphrodisiac property. In present study, It was aimed to test the hepatoprotective activity of the plant. Material and Methods: The methanolic extract of Dichrostachys cinerea (Mimoseae) leaves was subjected to evaluation of acute toxicity and hepatoprotective property, using albino mice and rats. The parameters for estimation of liver function, based on serum markers such as total bilirubin, total protein, alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase with histopathological profile of the liver tissue, were studied consequently. Results: The methanolic extract did not show any mortality up to a dose of 3500 mg/kg body weight. The methanolic extract showed significant hepatoprotectivity. The histopathological profile of the drug-treated liver tissue demonstrated similar morphology as that of controls. Conclusions: Methanolic extract of Dichrostachys cinerea was found to have significant hepatoprotective activity.
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Affiliation(s)
- P Suresh Babu
- Phytochemistry and Pharmacology Laboratory, Department of Post Graduate Studies and Research in Biotechnology and Bioinformatics, School of Biological Sciences, Kuvempu University, Shankaraghatta - 577 451, India
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Coffee consumption and reduced risk of hepatocellular carcinoma: findings from the Singapore Chinese Health Study. Cancer Causes Control 2011; 22:503-10. [PMID: 21258859 DOI: 10.1007/s10552-010-9725-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Accepted: 12/29/2010] [Indexed: 12/23/2022]
Abstract
BACKGROUND Coffee consumption has been associated with reduced markers of hepatic cell damage, reduced risk of chronic liver disease, and cirrhosis across a variety of populations. Data on the association between coffee consumption and risk of hepatocellular carcinoma (HCC), especially in high-risk populations, are sparse. METHODS This study examines the relationship between coffee and caffeine consumption, and the risk of developing HCC within the Singapore Chinese Health Study, a prospective cohort of 63,257 middle-aged and older Chinese men and women, a relatively high-risk population for HCC. Baseline data on coffee consumption and other dietary and lifestyle factors were collected through in-person interviews at enrollment between 1993 and 1998. RESULTS As of 31 December 2006, 362 cohort participants had developed HCC. High levels of coffee or caffeine consumption were associated with reduced risk of HCC (p for trend < 0.05). Compared with non-drinkers of coffee, individuals who consumed three or more cups of coffee per day experienced a statistically significant 44% reduction in risk of HCC (hazard ratio 0.56, 95% confidence interval, 0.31-1.00, p = .049) after adjustment for potential confounders and tea consumption. CONCLUSION These data suggest that coffee consumption may reduce the risk of developing HCC in Chinese in Singapore.
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Muriel P, Arauz J. Coffee and liver diseases. Fitoterapia 2010; 81:297-305. [DOI: 10.1016/j.fitote.2009.10.003] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2009] [Revised: 09/25/2009] [Accepted: 10/05/2009] [Indexed: 02/06/2023]
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Alhusainy W, Paini A, Punt A, Louisse J, Spenkelink A, Vervoort J, Delatour T, Scholz G, Schilter B, Adams T, van Bladeren P, Rietjens I. Identification of nevadensin as an important herb-based constituent inhibiting estragole bioactivation and physiology-based biokinetic modeling of its possible in vivo effect. Toxicol Appl Pharmacol 2010; 245:179-90. [DOI: 10.1016/j.taap.2010.02.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Revised: 02/17/2010] [Accepted: 02/26/2010] [Indexed: 10/19/2022]
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Antolino-Lobo I, Meulenbelt J, Nijmeijer SM, Scherpenisse P, van den Berg M, van Duursen MBM. Differential roles of phase I and phase II enzymes in 3,4-methylendioxymethamphetamine-induced cytotoxicity. Drug Metab Dispos 2010; 38:1105-12. [PMID: 20388857 DOI: 10.1124/dmd.110.032359] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Metabolism plays an important role in the toxic effects caused by 3,4-methylenedioxymethamphetamine (MDMA). Most research has focused on the involvement of CYP2D6 enzyme in MDMA bioactivation, and less is known about the contribution of other cytochrome P450 (P450) and phase II metabolism. In this study, we researched the differential roles of phase I P450 enzymes CYP1A2, CYP3A4, and CYP2D6 and phase II enzymes glutathione S-transferase (GST) and catechol-O-methyltransferase (COMT) on the toxic potential of MDMA. MDMA acts as inhibitor of its own metabolism with a relative potency of inhibition of CYP2D>CYP3A>> CYP1A in rat liver microsomes and in human liver [immortalized human liver epithelial cells (THLE)] cells transfected with individual CYP1A2, CYP3A4, or CYP2D6. Cytotoxicity measurements [by 3,(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] in THLE cells showed that the inhibition of phase I enzymes CYP1A2 by alpha-naphthoflavone and CYP3A4 by troleandomycin does not affect MDMA-induced cytotoxicity. MDMA metabolism by CYP2D6 significantly increased cytotoxicity, which was counteracted by CYP2D6 inhibition by quinidine. Inhibition of COMT by 2'-fluoro-3,4-dihydroxy-5-nitrobenzophenone (Ro-41-0960) and GST by buthionine sulfoximine showed that COMT is mainly involved in detoxification of CYP2D6-formed MDMA metabolites, whereas glutathione (GSH) is mainly involved in detoxification of CYP3A4-formed MDMA metabolites. Liquid chromatography/tandem mass spectrometry analyses of MDMA-metabolites in the THLE cell culture media confirmed formation of the specific MDMA metabolites and corroborated the observed cytotoxicity. Our data suggest that CYP2D6 as well as CYP3A4 play an important role in MDMA bioactivation. In addition, further studies are needed to address the differential roles of CYP3A4 and GSH/GST in MDMA bioactivation and detoxification.
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Affiliation(s)
- Irene Antolino-Lobo
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, Netherlands.
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Silva-Oliveira EM, Fernandes PA, Moraes-Santos T. Effect of Coffee on Chemical Hepatocarcinogenesis in Rats. Nutr Cancer 2010; 62:336-42. [DOI: 10.1080/01635580903407205] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Cell based approaches for evaluation of drug-induced liver injury. Toxicology 2010; 268:125-31. [DOI: 10.1016/j.tox.2009.08.007] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2009] [Revised: 07/22/2009] [Accepted: 08/05/2009] [Indexed: 12/15/2022]
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Lucia MD, Panzella L, Melck D, Giudicianni I, Motta A, Napolitano A, d’Ischia M. Differential Reactivity of Purified Bioactive Coffee Furans, Cafestol and Kahweol, with Acidic Nitrite: Product Characterization and Factors Controlling Nitrosation Versus Ring-Opening Pathways. Chem Res Toxicol 2009; 22:1922-8. [DOI: 10.1021/tx900224x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Maria De Lucia
- Department of Organic Chemistry and Biochemistry and Centro Interdipartimentale di Metodologie Chimico-Fisiche (CIMCF), University of Naples “Federico II”, Via Cinthia 4, I-80126 Naples, Italy, and Istituto di Chimica Biomolecolare del CNR, Comprensorio Olivetti, Edificio A, Via Campi Flegrei 34, I-80078 Pozzuoli Naples, Italy
| | - Lucia Panzella
- Department of Organic Chemistry and Biochemistry and Centro Interdipartimentale di Metodologie Chimico-Fisiche (CIMCF), University of Naples “Federico II”, Via Cinthia 4, I-80126 Naples, Italy, and Istituto di Chimica Biomolecolare del CNR, Comprensorio Olivetti, Edificio A, Via Campi Flegrei 34, I-80078 Pozzuoli Naples, Italy
| | - Dominique Melck
- Department of Organic Chemistry and Biochemistry and Centro Interdipartimentale di Metodologie Chimico-Fisiche (CIMCF), University of Naples “Federico II”, Via Cinthia 4, I-80126 Naples, Italy, and Istituto di Chimica Biomolecolare del CNR, Comprensorio Olivetti, Edificio A, Via Campi Flegrei 34, I-80078 Pozzuoli Naples, Italy
| | - Italo Giudicianni
- Department of Organic Chemistry and Biochemistry and Centro Interdipartimentale di Metodologie Chimico-Fisiche (CIMCF), University of Naples “Federico II”, Via Cinthia 4, I-80126 Naples, Italy, and Istituto di Chimica Biomolecolare del CNR, Comprensorio Olivetti, Edificio A, Via Campi Flegrei 34, I-80078 Pozzuoli Naples, Italy
| | - Andrea Motta
- Department of Organic Chemistry and Biochemistry and Centro Interdipartimentale di Metodologie Chimico-Fisiche (CIMCF), University of Naples “Federico II”, Via Cinthia 4, I-80126 Naples, Italy, and Istituto di Chimica Biomolecolare del CNR, Comprensorio Olivetti, Edificio A, Via Campi Flegrei 34, I-80078 Pozzuoli Naples, Italy
| | - Alessandra Napolitano
- Department of Organic Chemistry and Biochemistry and Centro Interdipartimentale di Metodologie Chimico-Fisiche (CIMCF), University of Naples “Federico II”, Via Cinthia 4, I-80126 Naples, Italy, and Istituto di Chimica Biomolecolare del CNR, Comprensorio Olivetti, Edificio A, Via Campi Flegrei 34, I-80078 Pozzuoli Naples, Italy
| | - Marco d’Ischia
- Department of Organic Chemistry and Biochemistry and Centro Interdipartimentale di Metodologie Chimico-Fisiche (CIMCF), University of Naples “Federico II”, Via Cinthia 4, I-80126 Naples, Italy, and Istituto di Chimica Biomolecolare del CNR, Comprensorio Olivetti, Edificio A, Via Campi Flegrei 34, I-80078 Pozzuoli Naples, Italy
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Tao KS, Wang W, Wang L, Cao DY, Li YQ, Wu SX, Dou KF. The multifaceted mechanisms for coffee’s anti-tumorigenic effect on liver. Med Hypotheses 2008; 71:730-6. [DOI: 10.1016/j.mehy.2008.06.026] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Revised: 06/10/2008] [Accepted: 06/12/2008] [Indexed: 11/26/2022]
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Pacitto SR, Uetrecht JP, Boutros PC, Popovic M. Changes In Gene Expression Induced by Tienilic Acid and Sulfamethoxazole: Testing the Danger Hypothesis. J Immunotoxicol 2008; 4:253-66. [DOI: 10.1080/15476910701680020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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George SE, Ramalakshmi K, Mohan Rao LJ. A Perception on Health Benefits of Coffee. Crit Rev Food Sci Nutr 2008; 48:464-86. [DOI: 10.1080/10408390701522445] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Muhammad I, Takamatsu S, Mustafa J, Khan SI, Khan IA, Samoylenko V, Mossa JS, El-Feraly FS, Dunbar DC. COX-2 Inhibitory Activity of Cafestol and Analogs from Coffee Beans. Nat Prod Commun 2008. [DOI: 10.1177/1934578x0800300103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Two kaurane diterpenes, namely cafestol (1) and kahweol (2), were isolated from hydrolyzed fraction of the fixed oil of Ethiopian Coffea arabica unroasted beans, using AgNO3-impregnated silica gel chromatography. In addition, cafestol palmitate (3) and kahweol palmitate (4), the two natural diterpene esters of C. arabica, were also synthesized. Compounds 1–4 were evaluated for anti-inflammatory activity using cyclooxygenase-2 (COX-2), cell aggregation, cell proliferation, cell adhesion, iNOS and antioxidant assays. The COX-2 inhibitory activity of cafestol (1) was found to be 20-fold more potent than kahweol (2) (IC50 value 0.25 μg/mL vs. 5.0 μg/mL), while compounds 3 and 4 were weakly active. The isolation and structure elucidation of the diterpenes 1 and 2, preparation of compounds 3 and 4, and their biological activities are presented in this paper.
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Affiliation(s)
- Ilias Muhammad
- National Center for Natural Products Research, and University of Mississippi, University, Mississippi 38677, USA
| | - Satoshi Takamatsu
- National Center for Natural Products Research, and University of Mississippi, University, Mississippi 38677, USA
- Kitasato Institute for Life Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa 228-8555, Japan
| | - Jamal Mustafa
- National Center for Natural Products Research, and University of Mississippi, University, Mississippi 38677, USA
- University Polytechnic, Aligarh Muslim University, Aligarh 202002, India
| | - Shabana I. Khan
- National Center for Natural Products Research, and University of Mississippi, University, Mississippi 38677, USA
| | - Ikhlas A. Khan
- National Center for Natural Products Research, and University of Mississippi, University, Mississippi 38677, USA
- Department of Pharmacognosy, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
| | - Volodymyr Samoylenko
- National Center for Natural Products Research, and University of Mississippi, University, Mississippi 38677, USA
| | - Jaber S. Mossa
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Farouk S. El-Feraly
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - D. Chuck Dunbar
- National Center for Natural Products Research, and University of Mississippi, University, Mississippi 38677, USA
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Induction of Nrf2-mediated cellular defenses and alteration of phase I activities as mechanisms of chemoprotective effects of coffee in the liver. Food Chem Toxicol 2007; 46:1239-48. [PMID: 17976884 DOI: 10.1016/j.fct.2007.09.099] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2007] [Revised: 09/05/2007] [Accepted: 09/17/2007] [Indexed: 12/28/2022]
Abstract
Coffee consumption has been associated with a significant decrease in the risk of developing chronic diseases such as Parkinson disease, diabetes type-2 and several types of cancers (e.g. colon, liver). In the present study, a coffee-dependent induction of enzymes involved in xenobiotic detoxification processes was observed in rat liver and primary hepatocytes. In addition, coffee was found to induce the mRNA and protein expression of enzymes involved in cellular antioxidant defenses. These inductions were correlated with the activation of the Nrf2 transcription factor as shown using an ARE-reporter luciferase assay. The induction of detoxifying enzymes GSTs and AKR is compatible with a protection against both genotoxicity and cytotoxicity of aflatoxin B1 (AFB1). This hypothesis was confirmed in in vitro and ex vivo test systems, where coffee reduced both AFB1-DNA and protein adducts. Interestingly, coffee was also found to inhibit cytochrome CYP1A1/2, indicating that other mechanisms different from a stimulation of detoxification may also play a significant role in the chemoprotective effects of coffee. Further investigations in either human liver cell line and primary hepatocytes indicated that the chemoprotective effects of coffee against AFB1 genotoxicity are likely to be of relevance for humans. These data strongly suggest that coffee may protect against the adverse effects of AFB1. In addition, the coffee-mediated stimulation of the Nrf2-ARE pathway resulting in increased endogenous defense mechanisms against electrophilic but also oxidative insults further support that coffee may be associated with a protection against various types of chemical stresses.
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Effects of coffee and its chemopreventive components kahweol and cafestol on cytochrome P450 and sulfotransferase in rat liver. Food Chem Toxicol 2007; 46:1230-8. [PMID: 17983700 DOI: 10.1016/j.fct.2007.09.094] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Revised: 09/05/2007] [Accepted: 09/17/2007] [Indexed: 10/22/2022]
Abstract
Coffee drinking appears to reduce cancer risk in liver and colon. Such chemoprevention may be caused by the diterpenes kahweol and cafestol (K/C) contained in unfiltered beverage. In animals, K/C treatment inhibited the mutagenicity/tumorigenicity of several carcinogens, likely explicable by beneficial modifications of xenobiotic metabolism, particularly by stimulation of carcinogen-detoxifying phase II mechanisms. In the present study, we investigated the influence of K/C on potentially carcinogen-activating hepatic cytochrome P450 (CYP450) and sulfotransferase (SULT). Male F344 rats received 0.2% K/C (1:1) in the diet for 10 days or unfiltered and/or filtered coffee as drinking fluid. Consequently, K/C decreased the metabolism of four resorufin derivatives representing CYP1A1, CYP1A2, CYP2B1, and CYP2B2 activities by approximately 50%. For CYP1A2, inhibition was confirmed at the mRNA level, accompanied by decreased CYP3A9. In contrast to K/C, coffee increased the metabolism of the resorufin derivatives up to 7-fold which was only marginally influenced by filtering. CYP2E1 activity and mRNA remained unchanged by K/C and coffee. K/C but not coffee decreased SULT by approximately 25%. In summary, K/C inhibited CYP450s by tendency but not universally. Inhibition of CYP450 and SULT may contribute to chemoprevention with K/C but involvement in the protection of coffee drinkers is unlikely. The data confirm that the effects of complex mixtures may deviate from those of their putatively active components.
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Lee KJ, Jeong HG. Protective effects of kahweol and cafestol against hydrogen peroxide-induced oxidative stress and DNA damage. Toxicol Lett 2007; 173:80-7. [PMID: 17689207 DOI: 10.1016/j.toxlet.2007.06.008] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Revised: 06/14/2007] [Accepted: 06/14/2007] [Indexed: 01/18/2023]
Abstract
There is an increasing evidence that oxidative stress is implicated in the processes of inflammation and carcinogenesis. It has been shown that kahweol and cafestol, coffee-specific diterpenes, exhibit chemoprotective effects. This study investigated the effects of kahweol and cafestol, coffee-specific diterpenes, on the hydrogen peroxide (H(2)O(2))-induced oxidative stress and DNA damage in NIH3T3 cells. When the cells were treated with kahweol or cafestol, cytotoxicity, lipid peroxidation, and reactive oxygen species production induced by H(2)O(2) were markedly reduced in a dose-dependent manner. Moreover, kahweol and cafestol were shown to be highly protected against H(2)O(2)-induced oxidative DNA damage as determined by the Comet (single cell gel electrophoresis) assay and the measurement of 8-oxoguanine content in NIH3T3 cells. Kahweol and cafestol also protected hydroxyl radical-induced 2-deoxy-d-ribose degradation by ferric ion-nitrilotriacetic acid and H(2)O(2). In addition, kahweol and cafestol efficiently removed the superoxide anion generated from the xanthine/xanthine oxidase system. These results suggest that kahweol and cafestol are effective in protecting against H(2)O(2)-induced oxidative stress and DNA damage, probably via scavenging free oxygen radicals, and that kahweol and cafestol act as antioxidants.
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Affiliation(s)
- Kyung Jin Lee
- BK21 Project Team, Department of Pharmacy, College of Pharmacy, Research Center for Proteineous Materials, Chosun University, 375 Seosuk-dong, Kwangju 501-759, South Korea
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Lee KJ, Choi JH, Jeong HG. Hepatoprotective and antioxidant effects of the coffee diterpenes kahweol and cafestol on carbon tetrachloride-induced liver damage in mice. Food Chem Toxicol 2007; 45:2118-25. [PMID: 17590492 DOI: 10.1016/j.fct.2007.05.010] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2006] [Revised: 04/09/2007] [Accepted: 05/14/2007] [Indexed: 01/20/2023]
Abstract
The hepatoprotective effects of kahweol and cafestol, coffee-specific diterpenes, on the carbon tetrachloride (CCl(4))-induced liver damage as well as the possible mechanisms involved in these protections were investigated. Pretreatment with kahweol and cafestol prior to the administration of CCl(4) significantly prevented the increase in the serum levels of hepatic enzyme markers (alanine aminotransferase and aspartate aminotransferase) and reduced oxidative stress, such as reduced glutathione content and lipid peroxidation, in the liver in a dose-dependent manner. The histopathological evaluation of the livers also revealed that kahweol and cafestol reduced the incidence of liver lesions induced by CCl(4). Treatment of the mice with kahweol and cafestol also resulted in a significant decrease in the cytochrome P450 2E1 (CYP2E1), the major isozyme involved in CCl(4) bioactivation, specific enzyme activities, such as p-nitrophenol and aniline hydroxylation. Kahweol and cafestol exhibited antioxidant effects on FeCl(2)-ascorbate induced lipid peroxidation in a mouse liver homogenate, and on superoxide radical scavenging activity. These results suggest that the protective effects of kahweol and cafestol against the CCl(4)-induced hepatotoxicity possibly involve mechanisms related to their ability to block the CYP2E1-mediated CCl(4) bioactivation and free radical scavenging effects.
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Affiliation(s)
- Kyung Jin Lee
- BK21 Project Team, Department of Pharmacy, College of Pharmacy, Research Center for Proteineous Materials, Chosun University, Kwangju, South Korea
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46
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Kim HG, Kim JY, Hwang YP, Lee KJ, Lee KY, Kim DH, Kim DH, Jeong HG. The coffee diterpene kahweol inhibits tumor necrosis factor-α-induced expression of cell adhesion molecules in human endothelial cells. Toxicol Appl Pharmacol 2006; 217:332-41. [PMID: 17097123 DOI: 10.1016/j.taap.2006.09.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2006] [Revised: 09/12/2006] [Accepted: 09/21/2006] [Indexed: 11/26/2022]
Abstract
Endothelial cells produce adhesion molecules after being stimulated with various inflammatory cytokines. These adhesion molecules play an important role in the development of atherogenesis. Recent studies have highlighted the chemoprotective and anti-inflammatory effects of kahweol, a coffee-specific diterpene. This study examined the effects of kahweol on the cytokine-induced monocyte/human endothelial cell interaction, which is a crucial early event in atherogenesis. Kahweol inhibited the adhesion of TNFalpha-induced monocytes to endothelial cells and suppressed the TNFalpha-induced protein and mRNA expression of the cell adhesion molecules, VCAM-1 and ICAM-1. Furthermore, kahweol inhibited the TNFalpha-induced JAK2-PI3K/Akt-NF-kappaB activation pathway in these cells. Overall, kahweol has anti-inflammatory and anti-atherosclerotic activities, which occurs partly by down-regulating the pathway that affects the expression and interaction of the cell adhesion molecules on endothelial cells.
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Affiliation(s)
- Hyung Gyun Kim
- Department of Pharmacy, College of Pharmacy, Research Center for Proteineous Materials, Chosun University, Kwangju, South Korea
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Protective Effect of the Coffee Diterpenes Kahweol and Cafestol on tert-Butyl Hydroperoxide-induced Oxidative Hepatotoxicity. B KOREAN CHEM SOC 2006. [DOI: 10.5012/bkcs.2006.27.9.1386] [Citation(s) in RCA: 7] [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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48
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Homan DJ, Mobarhan S. Coffee: good, bad, or just fun? A critical review of coffee's effects on liver enzymes. Nutr Rev 2006; 64:43-6. [PMID: 16491669 DOI: 10.1111/j.1753-4887.2006.tb00172.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Coffee consumption is a regular part of daily life throughout the world. Research into the effects of coffee on human health is ongoing, but a recent study suggests that coffee and caffeine consumption can reduce the risk of elevated alanine aminotransferase activity in individuals at high risk for liver disease. This review will analyze the results of that study in light of the current literature.
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Affiliation(s)
- David J Homan
- Division of Gastroenterology, Hepatology, and Nutrition, Loyola University Medical Center, Maywood, IL 60153, USA
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Hariparsad N, Sane RS, Strom SC, Desai PB. In vitro methods in human drug biotransformation research: implications for cancer chemotherapy. Toxicol In Vitro 2006; 20:135-53. [PMID: 16359840 DOI: 10.1016/j.tiv.2005.06.049] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2005] [Revised: 05/01/2005] [Accepted: 06/01/2005] [Indexed: 11/28/2022]
Abstract
Anticancer drugs have a complex pharmacological and toxicological profile with a narrow therapeutic index. It is therefore critical to understand the factors that contribute to the marked intersubject variability in the pharmacokinetics and pharmacodynamics often observed with anticancer compounds. Since hepatic and extra-hepatic drug metabolism represents a major drug disposition pathway, extensive efforts are made to thoroughly investigate metabolism of anticancer compounds during the pre-clinical and clinical development phases as well as to address issues encountered during the clinical use of an approved drug. In recent years there has been a significant paradigm shift in pre-clinical/non-clinical drug metabolism studies. Most importantly, this has included a reduced reliance on animal models and increased use of human tissues (i.e. human liver microsomes and other cellular fractions, primary culture of human hepatocytes, cDNA expressed human-specific enzymes and cell-based reporter assays). Typically, experiments are performed using these tools to identify the phase I and/or phase II enzymes involved in metabolism of the drug/investigational agent and for metabolic fingerprinting. Additionally, issues pertaining to the rate, extent and mechanism(s) of the inhibition or induction of the metabolic pathways are also investigated. These studies provide important clues about various aspects of the disposition of a therapeutic agent including first-pass metabolism, elimination half-life, overall bioavailability and the potential for drug-drug interactions. The methodologies used for in vitro assessment of drug metabolism and their applications to drug development and clinical therapeutics with special emphasis on anticancer drugs are reviewed in this manuscript.
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Affiliation(s)
- N Hariparsad
- College of Pharmacy, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA
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50
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Kim JY, Kim DH, Jeong HG. Inhibitory effect of the coffee diterpene kahweol on carrageenan-induced inflammation in rats. Biofactors 2006; 26:17-28. [PMID: 16614480 DOI: 10.1002/biof.5520260103] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Previous studies reported that kahweol, a coffee-specific diterpene, inhibits cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) expression in cultured lipopolysaccharide-activated macrophages. The aim of this study was to confirm the anti-inflammatory effects of kahweol by examining its effect on the inflammatory response induced by carrageenan in a rat using an acute air pouch inflammation model. Kahweol significantly reduced the levels of the inflammatory process markers in the air pouch, such as the volume of exudates, the amount of protein and the number of leukocytes and neutrophils. The levels of nitrite, TNF-alpha and prostaglandin E2 (PGE2) were also markedly lower in the air pouch of the kahweol-treated animals than in the controls. Immunoblot analysis showed that kahweol reduced the COX-2 and iNOS expression level in the exudate cells. The histological examination showed that there was a lower inflammatory response in the pouch tissues from the kahweol-treated animals. In addition, kahweol significantly reduced the paw edema induced by carrageenan and also markedly reduced the level of PGE2 production in the inflamed paw. These results suggest that kahweol has significant anti-inflammatory effects in vivo, which might be due to the inhibition of iNOS and COX-2 expression in the inflammatory sites.
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Affiliation(s)
- Ji Young Kim
- Department of Pharmacy, College of Pharmacy, Research Center for Proteineous Materials, Chosun University, Kwangju, South Korea
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