1
|
Ain Nazir NU, Shaukat MH, Luo R, Abbas SR. Novel breath biomarkers identification for early detection of hepatocellular carcinoma and cirrhosis using ML tools and GCMS. PLoS One 2023; 18:e0287465. [PMID: 37967076 PMCID: PMC10651033 DOI: 10.1371/journal.pone.0287465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 06/06/2023] [Indexed: 11/17/2023] Open
Abstract
According to WHO 2019, Hepatocellular carcinoma (HCC) is the fourth highest cause of cancer death worldwide. More precise diagnostic models are needed to enhance early HCC and cirrhosis quick diagnosis, treatment, and survival. Breath biomarkers known as volatile organic compounds (VOCs) in exhaled air can be used to make rapid, precise, and painless diagnoses. Gas chromatography and mass spectrometry (GCMS) are utilized to diagnose HCC and cirrhosis VOCs. In this investigation, metabolically generated VOCs in breath samples (n = 35) of HCC, (n = 35) cirrhotic, and (n = 30) controls were detected via GCMS and SPME. Moreover, this study also aims to identify diagnostic VOCs for distinction among HCC and cirrhosis liver conditions, which are most closely related, and cause misleading during diagnosis. However, using gas chromatography-mass spectrometry (GC-MS) to quantify volatile organic compounds (VOCs) is time-consuming and error-prone since it requires an expert. To verify GC-MS data analysis, we present an in-house R-based array of machine learning models that applies deep learning pattern recognition to automatically discover VOCs from raw data, without human intervention. All-machine learning diagnostic model offers 80% sensitivity, 90% specificity, and 95% accuracy, with an AUC of 0.9586. Our results demonstrated the validity and utility of GCMS-SMPE in combination with innovative ML models for early detection of HCC and cirrhosis-specific VOCs considered as potential diagnostic breath biomarkers and showed differentiation among HCC and cirrhosis. With these useful insights, we can build handheld e-nose sensors to detect HCC and cirrhosis through breath analysis and this unique approach can help in diagnosis by reducing integration time and costs without compromising accuracy or consistency.
Collapse
Affiliation(s)
- Noor ul Ain Nazir
- Atta-Ur-Rahman School of Applied Biosciences, National University of Sciences and Technology (NUST), Islamabad, Pakistan
- Department of Electrical Engineering and Computer Science, The Henry Samueli School of Engineering, University of California, Irvine, Irvine, CA, United States of America
| | | | - Ray Luo
- Departments of Chemical and Biomolecular Engineering, Materials Science and Engineering and Biomedical Engineering, the University of California, Irvine, Irvine, CA, United States of America
- Department of Molecular Biology and Biochemistry, School of Biological Sciences, University of California, Irvine, Irvine, CA, United States of America
| | - Shah Rukh Abbas
- Atta-Ur-Rahman School of Applied Biosciences, National University of Sciences and Technology (NUST), Islamabad, Pakistan
| |
Collapse
|
2
|
Kim DH, Sim Y, Hwang JH, Kwun IS, Lim JH, Kim J, Kim JI, Baek MC, Akbar M, Seo W, Kim DK, Song BJ, Cho YE. Ellagic Acid Prevents Binge Alcohol-Induced Leaky Gut and Liver Injury through Inhibiting Gut Dysbiosis and Oxidative Stress. Antioxidants (Basel) 2021; 10:antiox10091386. [PMID: 34573017 PMCID: PMC8465052 DOI: 10.3390/antiox10091386] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 12/16/2022] Open
Abstract
Alcoholic liver disease (ALD) is a major liver disease worldwide and can range from simple steatosis or inflammation to fibrosis/cirrhosis, possibly through leaky gut and systemic endotoxemia. Many patients with alcoholic steatohepatitis (ASH) die within 60 days after clinical diagnosis due to the lack of an approved drug, and thus, synthetic and/or dietary agents to prevent ASH and premature deaths are urgently needed. We recently reported that a pharmacologically high dose of pomegranate extract prevented binge alcohol-induced gut leakiness and hepatic inflammation by suppressing oxidative and nitrative stress. Herein, we investigate whether a dietary antioxidant ellagic acid (EA) contained in many fruits, including pomegranate and vegetables, can protect against binge alcohol-induced leaky gut, endotoxemia, and liver inflammation. Pretreatment with a physiologically-relevant dose of EA for 14 days significantly reduced the binge alcohol-induced gut barrier dysfunction, endotoxemia, and inflammatory liver injury in mice by inhibiting gut dysbiosis and the elevated oxidative stress and apoptosis marker proteins. Pretreatment with EA significantly prevented the decreased amounts of gut tight junction/adherent junction proteins and the elevated gut leakiness in alcohol-exposed mice. Taken together, our results suggest that EA could be used as a dietary supplement for alcoholic hepatitis patients.
Collapse
Affiliation(s)
- Dong-ha Kim
- Department of Food and Nutrition, Andong National University, Andong 36729, Korea; (D.-h.K.); (Y.S.); (J.-h.H.); (I.-S.K.)
| | - Yejin Sim
- Department of Food and Nutrition, Andong National University, Andong 36729, Korea; (D.-h.K.); (Y.S.); (J.-h.H.); (I.-S.K.)
| | - Jin-hyeon Hwang
- Department of Food and Nutrition, Andong National University, Andong 36729, Korea; (D.-h.K.); (Y.S.); (J.-h.H.); (I.-S.K.)
| | - In-Sook Kwun
- Department of Food and Nutrition, Andong National University, Andong 36729, Korea; (D.-h.K.); (Y.S.); (J.-h.H.); (I.-S.K.)
| | - Jae-Hwan Lim
- Department of Biological Science, Andong National University, Andong 36729, Korea;
| | - Jihoon Kim
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA;
| | - Jee-In Kim
- Department of Biochemistry and Cell Biology, School of Medicine, Kyungpook National University, Daegu 41944, Korea;
| | - Moon-Chang Baek
- Department of Molecular Medicine, School of Medicine, Cell & Matrix Research Institute, Kyungpook National University, Daegu 41944, Korea;
| | - Mohammed Akbar
- Division of Neuroscience and Behavior, National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD 20892, USA;
| | - Wonhyo Seo
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea;
| | - Do-Kyun Kim
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan 54531, Korea;
| | - Byoung-Joon Song
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health Bethesda, Bethesda, MD 20892, USA
- Correspondence: (B.-J.S.); (Y.-E.C.)
| | - Young-Eun Cho
- Department of Food and Nutrition, Andong National University, Andong 36729, Korea; (D.-h.K.); (Y.S.); (J.-h.H.); (I.-S.K.)
- Correspondence: (B.-J.S.); (Y.-E.C.)
| |
Collapse
|
3
|
Song J, He Y, Luo C, Feng B, Ran F, Xu H, Ci Z, Xu R, Han L, Zhang D. New progress in the pharmacology of protocatechuic acid: A compound ingested in daily foods and herbs frequently and heavily. Pharmacol Res 2020; 161:105109. [PMID: 32738494 DOI: 10.1016/j.phrs.2020.105109] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 07/21/2020] [Accepted: 07/21/2020] [Indexed: 12/13/2022]
Abstract
Protocatechuic acid is a natural phenolic acid, which widely exists in our daily diet and herbs. It is also one of the main metabolites of complex polyphenols, such as anthocyanins and proanthocyanins. In recent years, a large number of studies on the pharmacological activities of protocatechuic acid have emerged. Protocatechuic acid has a wide range of pharmacological activities including antioxidant, anti-inflammatory, neuroprotective, antibacterial, antiviral, anticancer, antiosteoporotic, analgesia, antiaging activties; protection from metabolic syndrome; and preservation of liver, kidneys, and reproductive functions. Pharmacokinetic studies showed that the absorption and elimination rate of protocatechuic acid are faster, with glucuronidation and sulfation being the major metabolic pathways. However, protocatechuic acid displays a dual-directional regulatory effect on some pharmacological activities. When the concentration is very high, it can inhibit cell proliferation and reduce survival rate. This review aims to comprehensively summarize the pharmacology, pharmacokinetics, and toxicity of protocatechuic acid with emphasis on its pharmacological activities discovered in recent 5 years, so as to provide more up-to-date and thorough information for the preclinical and clinical research of protocatechuic acid in the future. Moreover, it is hoped that the clinical application of protocatechuic acid can be broadened, giving full play to its characteristics of rich sources, low toxicity and wide pharmacological activites.
Collapse
Affiliation(s)
- Jiao Song
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China
| | - Yanan He
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China
| | - Chuanhong Luo
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China
| | - Bi Feng
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China
| | - Fei Ran
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China
| | - Hong Xu
- Chengdu Yongkang Pharmaceutical Co., Ltd., Chengdu 610041, PR China
| | - Zhimin Ci
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China
| | - Runchun Xu
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China
| | - Li Han
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China.
| | - Dingkun Zhang
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Key Laboratory Breeding Base of Systematic Research and Utilization on Chinese Meterial Medical Resources Co-founded by Sichuan Province and Ministry of Science and Technology, Chengdu 611137, PR China.
| |
Collapse
|
4
|
Pérez-Manríquez J, Escalona N, Pérez-Correa J. Bioactive Compounds of the PVPP Brewery Waste Stream and their Pharmacological Effects. MINI-REV ORG CHEM 2020. [DOI: 10.2174/1570193x16666190723112623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Beer, one of the most commonly consumed alcoholic beverages, is rich in polyphenols
and is the main dietary source of xanthohumol and related prenylflavonoids. However, to avoid haze
formation caused by the interaction between polyphenols and proteins, most phenolic compounds are
removed from beer and lost in the brewery waste stream via polyvinylpolypyrrolidone (PVPP)
adsorption. This waste stream contains several polyphenols with high antioxidant capacity and pharmacological
effects; that waste could be used as a rich, low-cost source of these compounds, though
little is known about its composition and potential attributes. This work aims to review the polyphenols
present in this brewery waste stream, as well as the health benefits associated with their consumption.
Collapse
Affiliation(s)
- J. Pérez-Manríquez
- Department of Chemical and Bioprocess Engineering, School of Engineering, Pontificia Universidad Catolica de Chile, Vicuna Mackenna 4860, Macul, Santiago, Chile
| | - N. Escalona
- Department of Chemical and Bioprocess Engineering, School of Engineering, Pontificia Universidad Catolica de Chile, Vicuna Mackenna 4860, Macul, Santiago, Chile
| | - J.R. Pérez-Correa
- Department of Chemical and Bioprocess Engineering, School of Engineering, Pontificia Universidad Catolica de Chile, Vicuna Mackenna 4860, Macul, Santiago, Chile
| |
Collapse
|
5
|
García-Niño WR, Zazueta C. Ellagic acid: Pharmacological activities and molecular mechanisms involved in liver protection. Pharmacol Res 2015; 97:84-103. [DOI: 10.1016/j.phrs.2015.04.008] [Citation(s) in RCA: 158] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 04/16/2015] [Accepted: 04/18/2015] [Indexed: 12/23/2022]
|
6
|
Sen A, Terzioglu G, Atmaca P, Celik G, Ozgun O, Arslan S. Modulatory actions ofo-coumaric acid on carcinogen-activating cytochrome P450 isozymes and the potential for drug interactions in human hepatocarcinoma cells. PHARMACEUTICAL BIOLOGY 2015; 53:1391-8. [PMID: 25880144 DOI: 10.3109/13880209.2015.1014919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Alaattin Sen
- Department of Biology, Pamukkale University , Kinikli Campus, Denizli , Turkey
| | | | | | | | | | | |
Collapse
|
7
|
Majed F, Rashid S, Khan AQ, Nafees S, Ali N, Ali R, Khan R, Hasan SK, Mehdi SJ, Sultana S. Tannic acid mitigates the DMBA/croton oil-induced skin cancer progression in mice. Mol Cell Biochem 2014; 399:217-28. [DOI: 10.1007/s11010-014-2248-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 10/09/2014] [Indexed: 12/14/2022]
|
8
|
|
9
|
Makaji E, Ho SHY, Holloway AC, Crankshaw DJ. Effects in Rats of Maternal Exposure to Raspberry Leaf and Its Constituents on the Activity of Cytochrome P450 Enzymes in the Offspring. Int J Toxicol 2010; 30:216-24. [DOI: 10.1177/1091581810388307] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The goal of our study was to determine whether maternal exposure to red raspberry leaf (RRL) and its constituents can permanently alter biotransformation of fluorogenic substrates by cytochrome P450 (CYP) in the livers of male and female offspring. Nulliparous female rats received vehicle, raspberry leaf, kaempferol, quercetin, or ellagic acid orally once breeding had been confirmed until parturition. Hepatic microsomes were prepared from animals at birth (postnatal day 1 [PND1]), weaning (PND21), PND65, and PND120 to determine the biotransformation of 8 fluorogenic substrates. The pattern of biotransformation of all but 2 of the substrates was gender specific. Maternal consumption of RRL increased biotransformation of 3 substrates by female offspring at PND120 resulting in a more masculine profile. Kaempferol and quercetin had a similar effect to RRL. These results suggest that maternal consumption of either RRL or some of its constituents leads to long-term alterations of CYP activity in female offspring.
Collapse
Affiliation(s)
- Emilija Makaji
- Department of Obstetrics & Gynecology, McMaster University, Hamilton, Ontario, Canada
| | - Shirley H. Y. Ho
- Department of Obstetrics & Gynecology, McMaster University, Hamilton, Ontario, Canada
- Honours Biology & Pharmacology Program McMaster University, Hamilton, Ontario, Canada
| | - Alison C. Holloway
- Department of Obstetrics & Gynecology, McMaster University, Hamilton, Ontario, Canada
| | - Denis J. Crankshaw
- Department of Obstetrics & Gynecology, McMaster University, Hamilton, Ontario, Canada
- Honours Biology & Pharmacology Program McMaster University, Hamilton, Ontario, Canada
| |
Collapse
|
10
|
Krajka-Kuźniak V, Szaefer H, Ignatowicz E, Adamska T, Oszmiański J, Baer-Dubowska W. Effect of Chokeberry (Aronia melanocarpa) juice on the metabolic activation and detoxication of carcinogenic N-nitrosodiethylamine in rat liver. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:5071-5077. [PMID: 19378944 DOI: 10.1021/jf803973y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Chokeberry is a rich source of polyphenols, which may counteract the action of chemical carcinogens. The aim of this study was to examine the effect of chokeberry juice alone or in combination with N-nitrosodiethylamine (NDEA) on phase I and phase II enzymes and DNA damage in rat liver. The forced feeding with chokeberry juice alone decreased the activities of enzymatic markers of cytochrome P450, CYP1A1 and 1A2. NDEA treatment also decreased the activity of CYP2E1 but enhanced the activity of CYP2B. Pretreatment with chokeberry juice further reduced the activity of these enzymes. Modulation of P450 enzyme activities was accompanied by the changes in the relevant proteins levels. Phase II enzymes were increased in all groups of animals tested. Chokeberry juice augmented DNA damage and aggravated the effect of NDEA. These results indicate that chokeberry may protect against liver damage; however, in combination with chemical carcinogens it might enhance their effect.
Collapse
|
11
|
Haley S, Lamb J, Franklin M, Constance J, Dearing M. “Pharm‐Ecology” of Diet Shifting: Biotransformation of Plant Secondary Compounds in Creosote (Larrea tridentata) by a Woodrat Herbivore,Neotoma lepida. Physiol Biochem Zool 2008; 81:584-93. [DOI: 10.1086/589951] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
12
|
Gnanamani A, Sudha M, Deepa G, Sudha M, Deivanai K, Sadulla S. Haematological and biochemical effects of polyphenolics in animal models. CHEMOSPHERE 2008; 72:1321-1326. [PMID: 18511106 DOI: 10.1016/j.chemosphere.2008.04.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2007] [Revised: 03/18/2008] [Accepted: 04/10/2008] [Indexed: 05/26/2023]
Abstract
Polyphenols of natural and synthetic origin are exploited in tanning sector to convert putrescible skin/hide to non-putrescible leather. However, only 30-40% of the inputs have been taken up for processing, the remaining is released as unspent. The existing conventional wastewater treatment systems are inefficient in removing or degrading these unspent polyphenols and thus detrimental to ecosystem. The present study demonstrates the evaluation of impact of both synthetic and natural polyphenols on biochemical and haematological properties of blood and serum in animal models. The results reveal that concentrations of polyphenols play a major role. At higher concentrations, irrespective of their nature, there was a marked change in the lipid profile (81% reduction), followed by insignificant change in glucose levels, RBC and WBC counts and other haematological parameters. At lower concentrations, no significant changes in the above said properties were observed.
Collapse
Affiliation(s)
- Arumugam Gnanamani
- Microbiology Division, Central Leather Research Institute, Adyar, Chennai, Tamil Nadu, India.
| | | | | | | | | | | |
Collapse
|
13
|
The inhibitory effect of tannic acid on cytochrome P450 enzymes and NADPH-CYP reductase in rat and human liver microsomes. Food Chem Toxicol 2008; 46:645-53. [DOI: 10.1016/j.fct.2007.09.073] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2006] [Revised: 07/18/2007] [Accepted: 09/09/2007] [Indexed: 11/23/2022]
|
14
|
Xenobiotic Metabolism of Plant Secondary Compounds in Oak (Quercus Agrifolia) by Specialist and Generalist Woodrat Herbivores, Genus Neotoma. J Chem Ecol 2007; 33:2111-22. [DOI: 10.1007/s10886-007-9371-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 07/05/2007] [Accepted: 09/18/2007] [Indexed: 01/22/2023]
|
15
|
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.
Collapse
|
16
|
Labieniec M, Gabryelak T. Antioxidative and oxidative changes in the digestive gland cells of freshwater mussels Unio tumidus caused by selected phenolic compounds in the presence of H2O2 or Cu2+ ions. Toxicol In Vitro 2007; 21:146-56. [PMID: 17084585 DOI: 10.1016/j.tiv.2006.09.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2006] [Revised: 09/18/2006] [Accepted: 09/27/2006] [Indexed: 11/24/2022]
Abstract
Research on biomarkers as early bioindicators of perturbation in populations and individuals has received increasing interest during recent decades. These ecotoxicity studies allow us to measure the impact of environmental stressors and to monitor and evaluate the degradation or restoration of systems. In the present study we used bivalve molluscs (mussels), which are sensitive biomarkers of aquatic ecosystem pollution, to assess the effects of three polyphenols: tannic acid, ellagic acid and gallic acid. These compounds were used in the 1-60 microM concentration range, alone and in the presence of H(2)O(2) (40 and 100 microM) or Cu(2+) ions (50 microM). The fluorescence probe dichlorofluorescein-diacetate (DCFH-DA) was used to measure reactive oxygen species (ROS). The oxidation of DCFH-DA to the fluorescent DCF (dichlorofluorescein) by the phenolic compounds was investigated spectrofluorimetrically. The results showed that the polyphenols tested can act as antioxidants against the ROS present in the digestive gland cells, but their activity is decreased after incubation with hydrogen peroxide or copper ions. SH-groups were determined spectrophotometrically using Ellman's reagent. The results showed that oxidative modification of proteins increased in a concentration-dependent manner in cells incubated with polyphenols (above 15 microM) alone. Incubation of the cells with phenolic acids and H(2)O(2) or Cu(2+) ions revealed that the phenolic acids had prooxidant properties in all concentrations used except for 1 microM tannic and ellagic acid and 40 microM H(2)O(2). DNA fragmentation was estimated by a fluorescence method using Hoechst 33258/propidium iodine binding. The data showed that the phenolic acids alone and in the presence of hydrogen peroxide or copper ions can induce apoptosis and necrosis. The methods used and results obtained indicate that the polyphenols selected can act not only as antioxidants but also as prooxidants in digestive gland cells of Unio tumidus.
Collapse
Affiliation(s)
- Magdalena Labieniec
- Institute of Biophysics, Department of General Biophysics, University of Lodz, 12/16 Banacha St., 90-237 Lodz, Poland
| | | |
Collapse
|
17
|
Lee SY, Oh SM, Lee SK, Chung KH. Antiestrogenic effects of marijuana smoke condensate and cannabinoid compounds. Arch Pharm Res 2006; 28:1365-75. [PMID: 16392670 DOI: 10.1007/bf02977903] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The antiestrogenic effects of marijuana smoke condensate (MSC) and three major cannabinoids, ie., delta9-tetrahydrocannabinol (THC), cannabidiol (CBD), and cannabinol (CBN), were evaluated using in vitro bioassays, viz., the human breast cancer cell proliferation assay, the recombinant human estrogen receptor (ER) competitive binding assay, and the reporter gene assay. The inhibitory effects on estrogen were also examined using the ethoxyresorufin-O-deethylase (EROD) assay, the aromatase assay, and the 17beta-estradiol (E2) metabolism assay. The results showed that MSC induced the antiestrogenic effect via the ER-mediated pathway, while THC, CBD, and CBN did not have any antiestrogenic activity. This suggests that the combined effects of the marijuana smoke components are responsible for the antiestrogenicity of marijuana use. In addition, MSC induced the CYP1A activity and the E2 metabolism, but inhibited the aromatase activity, suggesting that the antiestrogenic activity of MSC is also related to the indirect ER-dependent pathway, as a result of the depletion of the in situ E2 level available to bind to the ER. In conclusion, pyrogenic products including polycyclic aromatic hydrocarbons (PAHs) in the non-polar fraction, which is the most biologically active fraction among the seven fractions of MSC, might be responsible for the antiestrogenic effect.
Collapse
Affiliation(s)
- Soo Yeun Lee
- National Institute of Scientific Investigation, Seoul, Korea
| | | | | | | |
Collapse
|
18
|
Huetz P, Mavaddat N, Mavri J. Reaction between Ellagic Acid and an Ultimate Carcinogen. J Chem Inf Model 2005; 45:1564-70. [PMID: 16309255 DOI: 10.1021/ci050163c] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction coordinate between a typical ultimate carcinogen benzo[a]pyrene-7,8-diol-9,10-epoxide (BPDE) and ellagic acid, a proven chemopreventive agent active against cancers caused by polycyclic aromatic hydrocarbons (PAHs), was examined by density functional theory (DFT) and semiempirical MO calculations, and activation energy was calculated. The effect of a polar environment was included using Tomasi and the Langevin dipoles methods. The calculated BPDE/ellagic acid reaction free energy of activation is found to be in decent agreement with experimental data [Sayer, J. M. et al. J. Am. Chem. Soc. 1982, 104, 5562-5564]. This work sheds light on the mechanism of action of ellagic acid. Quantum chemical calculations of this kind are valuable for the design of ellagic acid derivatives with even lower activation energy and increased reactivity toward ultimate carcinogens as well as controlled reactivity toward DNA.
Collapse
Affiliation(s)
- Philippe Huetz
- Laboratoire de Physique Moléculaire, UMR CNRS 6624, Faculté des Sciences et Techniques, La Bouloie, Université de Franche-Comté, 25030 Besançon Cedex, France
| | | | | |
Collapse
|
19
|
|
20
|
Huber WW, Parzefall W. Modification of N‐Acetyltransferases and Glutathione S‐Transferases by Coffee Components: Possible Relevance for Cancer Risk. Methods Enzymol 2005; 401:307-41. [PMID: 16399395 DOI: 10.1016/s0076-6879(05)01020-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Enzymes of xenobiotic metabolism are involved in the activation and detoxification of carcinogens and can play a pivotal role in the susceptibility of individuals toward chemically induced cancer. Differences in such susceptibility are often related to genetically predetermined enzyme polymorphisms but may also be caused by enzyme induction or inhibition through environmental factors or in the frame of chemopreventive intervention. In this context, coffee consumption, as an important lifestyle factor, has been under thorough investigation. Whereas the data on a potential procarcinogenic effect in some organs remained inconclusive, epidemiology has clearly revealed coffee drinkers to be at a lower risk of developing cancers of the colon and the liver and possibly of several other organs. The underlying mechanisms of such chemoprotection, modifications of xenobiotic metabolism in particular, were further investigated in rodent and in vitro models, as a result of which several individual chemoprotectants out of the >1000 constituents of coffee were identified as well as some strongly metabolized individual carcinogens against which they specifically protected. This chapter discusses the chemoprotective effects of several coffee components and whole coffee in association with modifications of the usually protective glutathione-S-transferase (GST) and the more ambivalent N-acetyltransferase (NAT). A key role is played by kahweol and cafestol (K/C), two diterpenic constituents of the unfiltered beverage that were found to reduce mutagenesis/tumorigenesis by strongly metabolized compounds, such as 2-amino-1-methyl-6-phenylimidazo-[4,5-b]pyridine, 7,12-dimethylbenz[a]anthracene, and aflatoxin B(1), and to cause various modifications of xenobiotic metabolism that were overwhelmingly beneficial, including induction of GST and inhibition of NAT. Other coffee components such as polyphenols and K/C-free coffee are also capable of increasing GST and partially of inhibiting NAT, although to a somewhat lesser extent.
Collapse
Affiliation(s)
- Wolfgang W Huber
- Institut für Krebsforchung, Department of Toxicology, Medical University of Vienna, Austria
| | | |
Collapse
|