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Yamaguchi Y, Sugiki M, Shimizu M, Ogawa K, Kumagai H. Comparative analysis of isothiocyanates in eight cruciferous vegetables and evaluation of the hepatoprotective effects of 4-(methylsulfinyl)-3-butenyl isothiocyanate (sulforaphene) from daikon radish ( Raphanus sativus L.) sprouts. Food Funct 2024; 15:4894-4904. [PMID: 38597802 DOI: 10.1039/d4fo00133h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
The contributions of cruciferous vegetables to human health are widely recognised, particularly at the molecular level, where their isothiocyanates play a significant role. However, compared to the well-studied isothiocyanate 4-(methylsulfinyl)butyl isothiocyanate (sulforaphane) produced from broccoli sprouts, less is known about the pharmacological effects of other isothiocyanates and the stage of vegetables preferable to obtain their benefits. We analysed the quantity and quality of isothiocyanates produced in both the sprouts and mature stages of eight cruciferous vegetables using gas chromatography-mass spectrometry (GC-MS). Additionally, we investigated the hepatoprotective effects of isothiocyanates in a mouse model of acute hepatitis induced by carbon tetrachloride (CCl4). Furthermore, we explored the detoxification enzyme-inducing activities of crude sprout extracts in normal rats. Among the eight cruciferous vegetables, daikon radish (Raphanus sativus L.) sprouts produced the highest amount of isothiocyanates, with 4-(methylsulfinyl)-3-butenyl isothiocyanate (sulforaphene) being the dominant compound. The amount of sulforaphene in daikon radish sprouts was approximately 30 times that of sulforaphane in broccoli sprouts. Sulforaphene demonstrated hepatoprotective effects similar to sulforaphane in ameliorating CCl4-induced hepatic injury in mice. A crude extract of 3-day-old daikon radish sprouts upregulated the detoxifying enzyme glutathione S-transferase (GST) in the liver, whereas the crude extract of broccoli sprouts showed limited upregulation. This study highlights that daikon radish sprouts and sulforaphene have the potential to serve as functional food materials with hepatoprotective effects. Furthermore, daikon radish sprouts may exhibit more potent hepatoprotective effects compared to broccoli sprouts.
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Affiliation(s)
- Yusuke Yamaguchi
- College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan.
| | - Mikio Sugiki
- College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan.
| | - Motomi Shimizu
- College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan.
| | - Kazuki Ogawa
- College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan.
| | - Hitomi Kumagai
- College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-0880, Japan.
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Lavecchia A, Fosso B, Engelen AH, Borin S, Manzari C, Picardi E, Pesole G, Placido A. Macroalgal microbiomes unveil a valuable genetic resource for halogen metabolism. MICROBIOME 2024; 12:47. [PMID: 38454513 PMCID: PMC10919026 DOI: 10.1186/s40168-023-01740-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 12/18/2023] [Indexed: 03/09/2024]
Abstract
BACKGROUND Macroalgae, especially reds (Rhodophyta Division) and browns (Phaeophyta Division), are known for producing various halogenated compounds. Yet, the reasons underlying their production and the fate of these metabolites remain largely unknown. Some theories suggest their potential antimicrobial activity and involvement in interactions between macroalgae and prokaryotes. However, detailed investigations are currently missing on how the genetic information of prokaryotic communities associated with macroalgae may influence the fate of organohalogenated molecules. RESULTS To address this challenge, we created a specialized dataset containing 161 enzymes, each with a complete enzyme commission number, known to be involved in halogen metabolism. This dataset served as a reference to annotate the corresponding genes encoded in both the metagenomic contigs and 98 metagenome-assembled genomes (MAGs) obtained from the microbiome of 2 red (Sphaerococcus coronopifolius and Asparagopsis taxiformis) and 1 brown (Halopteris scoparia) macroalgae. We detected many dehalogenation-related genes, particularly those with hydrolytic functions, suggesting their potential involvement in the degradation of a wide spectrum of halocarbons and haloaromatic molecules, including anthropogenic compounds. We uncovered an array of degradative gene functions within MAGs, spanning various bacterial orders such as Rhodobacterales, Rhizobiales, Caulobacterales, Geminicoccales, Sphingomonadales, Granulosicoccales, Microtrichales, and Pseudomonadales. Less abundant than degradative functions, we also uncovered genes associated with the biosynthesis of halogenated antimicrobial compounds and metabolites. CONCLUSION The functional data provided here contribute to understanding the still largely unexplored role of unknown prokaryotes. These findings support the hypothesis that macroalgae function as holobionts, where the metabolism of halogenated compounds might play a role in symbiogenesis and act as a possible defense mechanism against environmental chemical stressors. Furthermore, bacterial groups, previously never connected with organohalogen metabolism, e.g., Caulobacterales, Geminicoccales, Granulosicoccales, and Microtrichales, functionally characterized through MAGs reconstruction, revealed a biotechnologically relevant gene content, useful in synthetic biology, and bioprospecting applications. Video Abstract.
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Affiliation(s)
- Anna Lavecchia
- Department of Biosciences, Biotechnology and Environment, University of Bari "Aldo Moro", Via Orabona 4, Bari, 70124, Italy
| | - Bruno Fosso
- Department of Biosciences, Biotechnology and Environment, University of Bari "Aldo Moro", Via Orabona 4, Bari, 70124, Italy
| | - Aschwin H Engelen
- Center of Marine Sciences (CCMar), University of Algarve, Campus Gambelas, Faro, 8005-139, Portugal
| | - Sara Borin
- Department of Food, Environmental and Nutritional Sciences, University of Milan, Via Celoria 2, Milan, 20133, Italy
| | - Caterina Manzari
- Department of Biosciences, Biotechnology and Environment, University of Bari "Aldo Moro", Via Orabona 4, Bari, 70124, Italy
| | - Ernesto Picardi
- Department of Biosciences, Biotechnology and Environment, University of Bari "Aldo Moro", Via Orabona 4, Bari, 70124, Italy
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council of Italy, Via Giovanni Amendola, Bari, 122/O, 70126, Italy
| | - Graziano Pesole
- Department of Biosciences, Biotechnology and Environment, University of Bari "Aldo Moro", Via Orabona 4, Bari, 70124, Italy
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council of Italy, Via Giovanni Amendola, Bari, 122/O, 70126, Italy
| | - Antonio Placido
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council of Italy, Via Giovanni Amendola, Bari, 122/O, 70126, Italy.
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Cohen SM, Bevan C, Gollapudi B, Klaunig JE. Evaluation of the carcinogenicity of carbon tetrachloride. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2023; 26:342-370. [PMID: 37282619 DOI: 10.1080/10937404.2023.2220147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Carbon tetrachloride (CCl4) has been extensively used and reported to produce toxicity, most notably involving the liver. Carbon tetrachloride metabolism involves CYP450-mediated bioactivation to trichloromethyl and trichloromethyl peroxy radicals, which are capable of macromolecular interaction with cell components including lipids and proteins. Radical interaction with lipids produces lipid peroxidation which can mediate cellular damage leading to cell death. Chronic exposure with CCl4 a rodent hepatic carcinogen with a mode of action (MOA) exhibits the following key events: 1) metabolic activation; 2) hepatocellular toxicity and cell death; 3) consequent regenerative increased cell proliferation; and 4) hepatocellular proliferative lesions (foci, adenomas, carcinomas). The induction of rodent hepatic tumors is dependent upon the dose (concentration and exposure duration) of CCl4, with tumors only occurring at cytotoxic exposure levels. Adrenal benign pheochromocytomas were also increased in mice at high CCl4 exposures; however, these tumors are not of relevant importance to human cancer risk. Few epidemiology studies that have been performed on CCl4, do not provide credible evidence of enhanced risk of occurrence of liver or adrenal cancers, but these studies have serious flaws limiting their usefulness for risk assessment. This manuscript summarizes the toxicity and carcinogenicity attributed to CCl4, specifically addressing MOA, dose-response, and human relevance.
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Affiliation(s)
- Samuel M Cohen
- Department of Pathology and Microbiology and Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, US
| | | | | | - James E Klaunig
- Department of Environmental and Occupational Health, Indiana University School of Public Health, Bloomington, IN, US
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Detection of a glutathionyl-carbonylated group (GS-CO-) on D-dopachrome tautomerase with preferential binding of GS-CO- to MIF proteins in rat livers damaged by carbon tetrachloride. Chem Biol Interact 2023; 374:110406. [PMID: 36804491 DOI: 10.1016/j.cbi.2023.110406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/07/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
Liver damage has been induced in animal experiments using carbon tetrachloride (CCl4), a potent hepatotoxin. CCl4 is activated by cytochrome P450 2E1, which results in the formation of various metabolites including phosgene. Although D-dopachrome tautomerase (DDT) is abundant in the liver, its role currently remains unclear. The biological activity of DDT, for which the N-terminal proline is a key site, has been detected in various tissues. We herein incidentally detected a 333 Da modification to the N-terminal proline of DDT in rat livers damaged by CCl4. We identified that this modification as glutathionyl carbonylated group, which was formed by condensation of phosgene and reduced glutathione (GSH). We examined other glutathionyl-carbonylated proteins using two dimensional-polyacrylamide gel electrophoresis, mass spectrometry, and Western blotting for GSH, and detected only one glutathionyl-carbonylated protein, macrophage migration inhibitory factor (MIF). DDT belongs to the MIF family of proteins, and amino acid sequence identity between DDT and MIF is 33%. We concluded that MIF family proteins are major targets for glutathionyl carbonylation.
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Qiu Y, Song W, Yang Y, Zhou G, Bai Y, Akihisa T, Ye F, Feng F, Zhang W, Zhang J. Isolation, structural and bioactivities of polysaccharides from Anoectochilus roxburghii (Wall.) Lindl.: A review. Int J Biol Macromol 2023; 236:123883. [PMID: 36889614 DOI: 10.1016/j.ijbiomac.2023.123883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/11/2023] [Accepted: 02/26/2023] [Indexed: 03/08/2023]
Abstract
Anoectochilus roxburghii (Wall.) Lindl. (A. roxburghii), a valuable herbal medicine in China, has great medicinal and edible value. Polysaccharides, as one of the main active components of A. roxburghii, comprise glucose, arabinose, xylose, galactose, rhamnose, and mannose in different molar ratios and glycosidic bond types. By varying the sources and extraction methods of A. roxburghii polysaccharides (ARPS), different structural characteristics and pharmacological activities can be elucidated. ARPS has been reported to exhibit antidiabetic, hepatoprotective, anti-inflammatory, antioxidant, antitumor, and immune regulation activities. This review summarizes the available literature on the extraction and purification methods, structural features, biological activities, and applications of ARPS. The shortcomings of the current research and potential focus in future studies are also highlighted. This review provides systematic and current information on ARPS to promote their further exploitation and application.
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Affiliation(s)
- Yi Qiu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Wenbo Song
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Ying Yang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Guojie Zhou
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Yidan Bai
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Toshihiro Akihisa
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China; Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Feng Ye
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Feng Feng
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Wangshu Zhang
- Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China.
| | - Jie Zhang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China.
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Phung HH, Lee CH. Mouse models of nonalcoholic steatohepatitis and their application to new drug development. Arch Pharm Res 2022; 45:761-794. [DOI: 10.1007/s12272-022-01410-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 10/10/2022] [Indexed: 11/05/2022]
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Kim CG, Chang SN, Park SM, Hwang BS, Kang SA, Kim KS, Park JG. Moringa oleifera mitigates ethanol-induced oxidative stress, fatty degeneration and hepatic steatosis by promoting Nrf2 in mice. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 100:154037. [PMID: 35358929 DOI: 10.1016/j.phymed.2022.154037] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 02/04/2022] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Moringa oleifera (M. oleifera) is cultivated throughout the world and it is known by numerous regional names and is consumed as medication for various diseases such as hypertension, diabetes, HIV and is potential source of nutrients and natural antioxidants making it among the most useful trees. METHODS We evaluated the therapeutic potential of M. oleifera on ethanol-induced fatty liver. The mice were treated with 30% ethanol (EtOH) alone or in combination with different concentration of M. oleifera extracts (100, 200 and 400 mg/kg). We performed biochemical estimation for the serum of important liver damage markers such as aspartate aminotransferase (AST), alanine aminotransferase (ALT) and triglyceride (TG). We performed histopathological analysis from the liver tissues of different mice groups. We also performed ELISA assay, western blotting analysis and SPECT imaging to obtain our results. RESULTS The results for serum (AST, p < 0.0001), (ALT, p < 0.0006) and triglyceride (TG, p < 0.0003) were found to be significantly reduced in all doses of M. oleifera extract treatment groups in comparison with the ethanol group. H&E staining analysis and scoring revealed a significant reduction in lipid droplet accumulation and a significant reduction of liver steatosis (p < 0.0001), lobular inflammation (p < 0.0013), ballooning (p < 0.0004) and immunohistochemistry for TNF-α. M. oleifera also ameliorated ethanol-induced oxidative stress evaluated through MDA (p < 0.0001), H2DCFDA, JC-1 staining and a significant down-regulation of CYP2E1 enzyme (p < 0.0001) in the 200 and 400 mg/kg groups in comparison with EtOH groups. M. oleifera extract also boosted the antioxidant response evaluated through total GSH assay (p < 0.0001) and nuclear translocation of Nrf2. Furthermore, we performed SPECT imaging and evaluated the liver uptake value (LUV) to assess the extent of liver damage. LUV was observed to be lower in the ethanol group, whereas LUV was higher in control and M. olifera treated groups. CONCLUSION In summary, from this experiment we conclude that M. oleifera extract has the potential to ameliorate ethanol-induced liver damage.
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Affiliation(s)
- Chang Geon Kim
- Advanced Bio Convergence Center (ABCC), Pohang Technopark Foundation, Pohang, Gyeongbuk, 37668, Republic of Korea; School of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk 712749, Republic of Korea
| | - Sukkum Ngullie Chang
- Advanced Bio Convergence Center (ABCC), Pohang Technopark Foundation, Pohang, Gyeongbuk, 37668, Republic of Korea; Department of Biotechnology, Daegu University, Gyeongsan, 38453, Republic of Korea
| | - Seon Min Park
- Advanced Bio Convergence Center (ABCC), Pohang Technopark Foundation, Pohang, Gyeongbuk, 37668, Republic of Korea; Department of Veterinary Toxicology, College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Korea
| | - Buyng Su Hwang
- Nakdonggang National Institute of Biological Resources, Sangju, 37242, Republic of Korea
| | - Sung-A Kang
- Advanced Bio Convergence Center (ABCC), Pohang Technopark Foundation, Pohang, Gyeongbuk, 37668, Republic of Korea
| | - Kil Soo Kim
- Department of Veterinary Toxicology, College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Korea.
| | - Jae Gyu Park
- Advanced Bio Convergence Center (ABCC), Pohang Technopark Foundation, Pohang, Gyeongbuk, 37668, Republic of Korea.
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Oxidative Stress, Genomic Integrity, and Liver Diseases. Molecules 2022; 27:molecules27103159. [PMID: 35630636 PMCID: PMC9147071 DOI: 10.3390/molecules27103159] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/12/2022] [Accepted: 05/13/2022] [Indexed: 02/04/2023] Open
Abstract
Excess reactive oxygen species production and free radical formation can lead to oxidative stress that can damage cells, tissues, and organs. Cellular oxidative stress is defined as the imbalance between ROS production and antioxidants. This imbalance can lead to malfunction or structure modification of major cellular molecules such as lipids, proteins, and DNAs. During oxidative stress conditions, DNA and protein structure modifications can lead to various diseases. Various antioxidant-specific gene expression and signal transduction pathways are activated during oxidative stress to maintain homeostasis and to protect organs from oxidative injury and damage. The liver is more vulnerable to oxidative conditions than other organs. Antioxidants, antioxidant-specific enzymes, and the regulation of the antioxidant responsive element (ARE) genes can act against chronic oxidative stress in the liver. ARE-mediated genes can act as the target site for averting/preventing liver diseases caused by oxidative stress. Identification of these ARE genes as markers will enable the early detection of liver diseases caused by oxidative conditions and help develop new therapeutic interventions. This literature review is focused on antioxidant-specific gene expression upon oxidative stress, the factors responsible for hepatic oxidative stress, liver response to redox signaling, oxidative stress and redox signaling in various liver diseases, and future aspects.
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Masubuchi Y, Ihara A. Protection of mice against carbon tetrachloride-induced acute liver injury by endogenous and exogenous estrogens. Drug Metab Pharmacokinet 2022; 46:100460. [DOI: 10.1016/j.dmpk.2022.100460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/22/2022] [Accepted: 04/01/2022] [Indexed: 11/16/2022]
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Wang T, Sun Q, Yang J, Wang G, Zhao F, Chen Y, Jin Y. Reactive astrocytes induced by 2-chloroethanol modulate microglia polarization through IL-1β, TNF-α, and iNOS upregulation. Food Chem Toxicol 2021; 157:112550. [PMID: 34517076 DOI: 10.1016/j.fct.2021.112550] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 09/02/2021] [Accepted: 09/08/2021] [Indexed: 01/06/2023]
Abstract
The synthetic organic chemical, 1,2-dichloroethane (1,2-DCE), can cause brain edemas under subacute poisoning. Our previous studies indicated that neuroinflammation could be induced due to astrocytes and microglia activation during brain edemas in 1,2-DCE-intoxicated mice. However, the crosstalk between these two glial cells in 1,2-DCE-induced neuroinflammation remained unclear. In this study, primary cultured rat astrocytes and microglia, as well as an immortalized microglia cell line were employed to study the effects of 2-chloroethanol (2-CE, a 1,2-DCE intermediate metabolite in vivo) treated astrocytes on microglia polarization. Our current results revealed that 2-CE treated rat astrocytes were activated through p38 mitogen-activated protein kinase (p38 MAPK)/nuclear factor-κB (NF-κB), and activator protein-1 (AP-1) signaling pathways. Theses pathways were triggered by reactive oxygen species (ROS) produced during 2-CE metabolism. Also, astrocytes were more sensitive to 2-CE effects than microglia. Interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), and inducible nitric oxide synthase (iNOS) expressions were upregulated in 2-CE-induced reactive astrocytes, enhancing IL-1β, TNF-α, and nitric oxide (NO) excretions, which stimulated microglia polarization. Therefore, the neuroinflammation induced by 1,2-DCE in mice's brains is probably triggered by reactive astrocytes.
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Affiliation(s)
- Tong Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Qi Sun
- Department of Child and Adolescent Health, China Medical University, Shenyang, China
| | - Jinhan Yang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Gaoyang Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Fenghong Zhao
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Yuhua Chen
- Department of Developmental Biology, Key Laboratory of Cell Biology, Ministry of Public Health and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, China
| | - Yaping Jin
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, China.
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Pterostilbene is more efficacious than hydroxystilbenes in protecting liver fibrogenesis in a carbon tetracholride-induced rat model. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Yamaguchi Y, Hirata Y, Saito T, Kumagai H. Combined Effects of Amino Acids in Garlic and Buna-Shimeji ( Hypsizygus marmoreus) on Suppression of CCl 4-Induced Hepatic Injury in Rats. Foods 2021; 10:foods10071491. [PMID: 34199038 PMCID: PMC8306630 DOI: 10.3390/foods10071491] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/15/2021] [Accepted: 06/22/2021] [Indexed: 12/31/2022] Open
Abstract
The combination of the garlic-derived amino acid, S-allyl-l-cysteine sulfoxide (ACSO), and ornithine or arginine on CCl4-induced hepatic injury was examined. After investigating the effectiveness of the mixture of ACSO and ornithine or arginine in preventing hepatic injury in vivo, an extract rich in ACSO and ornithine was prepared by converting arginine in garlic to ornithine by arginase from Hypsizygus marmoreus (buna-shimeji), after screening the productivity of ornithine among 12 kinds of mushrooms. Co-administration of ACSO with ornithine or arginine suppressed the increase in aspartate transaminase, alanine transaminase, and thiobarbituric acid reactive substance, and the decrease in glutathione S-transferase and cytochrome p450 2E1 activities after CCl4 injection more effectively than a single administration of ACSO. All extracts prepared from garlic and buna-shimeji with low and high contents of ACSO and arginine or ornithine significantly suppressed CCl4-induced hepatic injury in rats. Considering that ACSO is tasteless, odourless, and enhances taste, and ornithine has a flat or sweet taste and masks bitterness, the extract rich in ACSO and ornithine from garlic and buna-shimeji could be considered a potential antioxidant food material that can be added to many kinds of food to prevent hepatic injury.
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Affiliation(s)
- Yusuke Yamaguchi
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan; (Y.Y.); (Y.H.)
| | - Yushi Hirata
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan; (Y.Y.); (Y.H.)
| | - Takeshi Saito
- ACERA Co., Ltd., 156 Nishitakahashi-machi, Kofu-shi 400-0826, Japan;
| | - Hitomi Kumagai
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan; (Y.Y.); (Y.H.)
- Correspondence: ; Tel.: +81-466-3946
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Nie Y, Xu SF, Lu YL, Zhao XR, Li C, Wei LX, Liu J. Zuotai (β-HgS)-containing 70 Wei Zhen-Zhu-Wan differs from mercury chloride and methylmercury on hepatic cytochrome P450 in mice. F1000Res 2021; 10:203. [PMID: 34249337 PMCID: PMC8240600 DOI: 10.12688/f1000research.40667.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/24/2021] [Indexed: 08/09/2023] Open
Abstract
Background: Zuotai (mainly β-HgS)-containing 70 Wei-Zhen-Zhu-Wan (70W, Rannasangpei) is a famous Tibetan medicine for treating cardiovascular and gastrointestinal diseases. We have shown that 70W protected against CCl 4 hepatotoxicity. CCl 4 is metabolized via cytochrome P450 (CYP) to produce reactive metabolites. Whether 70W has any effect on CYPs is unknown and such effects should be compared with mercury compounds for safety evaluation. Methods: Mice were given clinical doses of 70W (0.15-1.5 g/kg, po), Zuotai (30 mg/kg, po), and compared to HgCl 2 (33.6 mg/kg, po) and MeHg (3.1 mg/kg, po) for seven days. Liver RNA and protein were isolated for qPCR and Western-blot analysis. Results: 70W and Zuotai had no effects on hepatic mRNA expression of Cyp1a2, Cyp2b10, Cyp3a11, Cyp4a10 and Cyp7a1, and corresponding nuclear receptors [aryl hydrocarbon receptor (AhR), constitutive androstane receptor (CAR), pregnane X receptor (PXR), peroxisome proliferator-activated receptor-α (PPARα); farnesoid X receptor (FXR)]. In comparison, HgCl 2 and MeHg increased mRNA expression of Cyp1a2, Cyp2b10, Cyp4a10 and Cyp7a1 except for Cyp3a11, and corresponding nuclear receptors except for PXR. Western-blot confirmed mRNA results, showing increases in CYP1A2, CYP2B1, CYP2E1, CYP4A and CYP7A1 by HgCl 2 and MeHg only, and all treatments had no effects on CYP3A. Conclusions: Zuotai and Zuotai-containing 70W at clinical doses had minimal influence on hepatic CYPs and corresponding nuclear receptors, while HgCl 2 and MeHg produced significant effects. Thus, the use of total Hg content to evaluate the safety of HgS-containing 70W is inappropriate.
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Affiliation(s)
- Yu Nie
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
- Research Lab, Zunyi Blood Center, Zunyi, 563000, China
| | - Shang-Fu Xu
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
| | - Yan-Liu Lu
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
| | - Xiu-Rong Zhao
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
| | - Cen Li
- Key Lab of Tibetan Medicine, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, 810001, China
| | - Li-Xin Wei
- Key Lab of Tibetan Medicine, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, 810001, China
| | - Jie Liu
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
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14
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Nie Y, Xu SF, Lu YL, Zhao XR, Li C, Wei LX, Liu J. Zuotai (β-HgS)-containing 70 Wei Zhen-Zhu-Wan differs from mercury chloride and methylmercury on hepatic cytochrome P450 in mice. F1000Res 2021; 10:203. [PMID: 34249337 PMCID: PMC8240600 DOI: 10.12688/f1000research.40667.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/22/2021] [Indexed: 12/19/2022] Open
Abstract
Background: Zuotai (mainly β-HgS)-containing 70 Wei-Zhen-Zhu-Wan (70W, Rannasangpei) is a famous Tibetan medicine for treating cardiovascular and gastrointestinal diseases. We have shown that 70W protected against CCl 4 hepatotoxicity. CCl 4 is metabolized via cytochrome P450 (CYP) to produce reactive metabolites. Whether 70W has any effect on CYPs is unknown and such effects should be compared with mercury compounds for safety evaluation. Methods: Mice were given clinical doses of 70W (0.15-1.5 g/kg, po), Zuotai (30 mg/kg, po), and compared to HgCl 2 (33.6 mg/kg, po) and MeHg (3.1 mg/kg, po) for seven days. Liver RNA and protein were isolated for qPCR and Western-blot analysis. Results: 70W and Zuotai had no effects on hepatic mRNA expression of Cyp1a2, Cyp2b10, Cyp3a11, Cyp4a10 and Cyp7a1, and corresponding nuclear receptors [aryl hydrocarbon receptor (AhR), constitutive androstane receptor (CAR), pregnane X receptor (PXR), peroxisome proliferator-activated receptor-α (PPARα); farnesoid X receptor (FXR)]. In comparison, HgCl 2 and MeHg increased mRNA expression of Cyp1a2, Cyp2b10, Cyp4a10 and Cyp7a1 except for Cyp3a11, and corresponding nuclear receptors except for PXR. Western-blot confirmed mRNA results, showing increases in CYP1A2, CYP2B1, CYP2E1, CYP4A and CYP7A1 by HgCl 2 and MeHg only, and all treatments had no effects on CYP3A. Conclusions: Zuotai and Zuotai-containing 70W at clinical doses had minimal influence on hepatic CYPs and corresponding nuclear receptors, while HgCl 2 and MeHg produced significant effects. Thus, the use of total Hg content to evaluate the safety of HgS-containing 70W is inappropriate.
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Affiliation(s)
- Yu Nie
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
- Research Lab, Zunyi Blood Center, Zunyi, 563000, China
| | - Shang-Fu Xu
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
| | - Yan-Liu Lu
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
| | - Xiu-Rong Zhao
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
| | - Cen Li
- Key Lab of Tibetan Medicine, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, 810001, China
| | - Li-Xin Wei
- Key Lab of Tibetan Medicine, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai, 810001, China
| | - Jie Liu
- Key Laboratory for Basic Pharmacology of Ministry of Education and the Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563006, China
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15
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Meaden CW, Procopio G, Calello DP, Nelson LS, Ruck B, Gupta A, Jacob JE. Carbon tetrachloride poisoning from an antique fire extinguisher. Am J Emerg Med 2020; 38:2139-2141. [PMID: 33071087 DOI: 10.1016/j.ajem.2020.07.052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 07/17/2020] [Indexed: 11/30/2022] Open
Affiliation(s)
- Christopher W Meaden
- Rutgers New Jersey Medical School, Newark, NJ, United States of America; New Jersey Poison Information and Education System, Newark, NJ, United States of America.
| | - Gabrielle Procopio
- Hackensack University Medical Center, Hackensack, NJ, United States of America
| | - Diane P Calello
- Rutgers New Jersey Medical School, Newark, NJ, United States of America; New Jersey Poison Information and Education System, Newark, NJ, United States of America
| | - Lewis S Nelson
- Rutgers New Jersey Medical School, Newark, NJ, United States of America; New Jersey Poison Information and Education System, Newark, NJ, United States of America
| | - Bruce Ruck
- Rutgers New Jersey Medical School, Newark, NJ, United States of America; New Jersey Poison Information and Education System, Newark, NJ, United States of America
| | - Amit Gupta
- Hackensack University Medical Center, Hackensack, NJ, United States of America
| | - Jeena E Jacob
- Rutgers New Jersey Medical School, Newark, NJ, United States of America; New Jersey Poison Information and Education System, Newark, NJ, United States of America
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16
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Isolation and Characterization of a Novel Bacterium from the Marine Environment for Trichloroacetic Acid Bioremediation. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10134593] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Halogenated compounds are an important class of environmental pollutants that are widely used in industrial chemicals such as solvents, herbicides, and pesticides. Many studies have been carried out to explore the biodegradation of these chemicals. Trichloroacetic acid (TCA) is one of the main halogenated compounds that are carcinogenic to humans and animals. The bacterium was isolated from the northern coastline of Johor Strait. In this study, the ability of strain MH2 to biodegrade TCA was evaluated by a growth experiment and dehalogenase enzyme assay. The growth profile of the isolated strain was examined. The doubling time for L. boronitolerans MH2 was found to be 32 h. The release of chloride ion in the degradation process was measured at 0.33 × 10−3 ± 0.03 mol∙L−1 after 96 h when the growth curve had reached its maximum within the late bacterial exponential phase. The results showed that the strain had a promising ability to degrade TCA by producing dehalogenase enzyme when cell-free extracts were prepared from growth on TCA as the sole carbon source with enzyme-specific activity, 1.1 ± 0.05 µmolCl−min−1∙mg−1 protein. Furthermore, the morphological, and biochemical aspects of the isolated bacterium were studied to identify and characterize the strain. The morphological observation of the isolated bacterium was seen to be a rod-shaped, Gram-positive, motile, heterotrophic, and spore-forming bacterium. The amplification of the 16S rRNA and gene analysis results indicated that the isolated bacterium had 98% similarity to Lysinibacillus boronitolerans. The morphological and biochemical tests supported the 16S rRNA gene amplification. To the best of the authors’ knowledge, this is the first reported case of this genus of bacteria to degrade this type of halogenated compound.
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17
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Guengerich FP. Cytochrome P450 2E1 and its roles in disease. Chem Biol Interact 2020; 322:109056. [PMID: 32198084 PMCID: PMC7217708 DOI: 10.1016/j.cbi.2020.109056] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 12/12/2019] [Accepted: 03/10/2020] [Indexed: 12/27/2022]
Abstract
Cytochrome P450 (P450) 2E1 is the major P450 enzyme involved in ethanol metabolism. That role is shared with two other enzymes that oxidize ethanol, alcohol dehydrogenase and catalase. P450 2E1 is also involved in the bioactivation of a number of low molecular weight cancer suspects, as validated in vivo in mouse models where cancers could be attenuated by deletion of Cyp2e1. P450 2E1 does not have a role in global production of reactive oxygen species but localized roles are possible, e.g. in mitochondria. The structures, conformations, and catalytic mechanisms of P450 2E1 have some unusual features among P450s. The concentration of hepatic P450 varies ≥10-fold among humans, possibly in part due to single nucleotide variants. The level of P450 2E1 may have relevance in the rates of oxidation of drugs, particularly acetaminophen and anesthetics.
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Affiliation(s)
- F Peter Guengerich
- Department of Biochemistry, Vanderbilt University School of Medicine, 638 Robinson Research Building, 2200 Pierce Avenue, Nashville, TN, 37232-0146, USA.
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18
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Yamaguchi Y, Honma R, Yazaki T, Shibuya T, Sakaguchi T, Uto-Kondo H, Kumagai H. Sulfuric Odor Precursor S-Allyl-l-Cysteine Sulfoxide in Garlic Induces Detoxifying Enzymes and Prevents Hepatic Injury. Antioxidants (Basel) 2019; 8:antiox8090385. [PMID: 31509980 PMCID: PMC6769545 DOI: 10.3390/antiox8090385] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/07/2019] [Accepted: 09/08/2019] [Indexed: 12/24/2022] Open
Abstract
S-Allyl-l-cysteine sulfoxide (ACSO) is a precursor of garlic-odor compounds like diallyl disulfide (DADS) and diallyl trisulfide (DATS) known as bioactive components. ACSO has suitable properties as a food material because it is water-soluble, odorless, tasteless and rich in bulbs of fresh garlic. The present study was conducted to examine the preventive effect of ACSO on hepatic injury induced by CCl4 in rats. ACSO, its analogs and garlic-odor compounds were each orally administered via gavage for five consecutive days before inducing hepatic injury. Then, biomarkers for hepatic injury and antioxidative state were measured. Furthermore, we evaluated the absorption and metabolism of ACSO in the small intestine of rats and NF-E2-related factor 2 (Nrf2) nuclear translocation by ACSO using HepG2 cells. As a result, ACSO, DADS and DATS significantly suppressed the increases in biomarkers for hepatic injury such as the activities of aspartate transaminase (AST), alanine transaminase (ALT) and lactate dehydrogenase (LDH), and decreases in antioxidative potency such as glutathione (GSH) level and the activities of glutathione S-transferase (GST) and glutathione peroxidase (GPx). We also found ACSO was absorbed into the portal vein from the small intestine but partially metabolized to DADS probably in the small intestine. In in vitro study, ACSO induced Nrf2 nuclear translocation in HepG2 cells, which is recognized as an initial trigger to induce antioxidative and detoxifying enzymes. Taken together, orally administered ACSO probably reached the liver and induced antioxidative and detoxifying enzymes by Nrf2 nuclear translocation, resulting in prevention of hepatic injury. DADS produced by the metabolism of ACSO in the small intestine might also have contributed to the prevention of hepatic injury. These results suggest potential use of ACSO in functional foods that prevent hepatic injury and other diseases caused by reactive oxygen species (ROS).
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Affiliation(s)
- Yusuke Yamaguchi
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan.
| | - Ryosuke Honma
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan.
| | - Tomoaki Yazaki
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan.
| | - Takeshi Shibuya
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan.
| | - Tomoya Sakaguchi
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan.
| | - Harumi Uto-Kondo
- Department of Bioscience in Daily Life, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan.
| | - Hitomi Kumagai
- Department of Chemistry and Life Science, Nihon University, 1866 Kameino, Fujisawa-shi 252-0880, Japan.
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19
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Chen J, Jiang S, Wang J, Renukuntla J, Sirimulla S, Chen J. A comprehensive review of cytochrome P450 2E1 for xenobiotic metabolism. Drug Metab Rev 2019; 51:178-195. [PMID: 31203697 DOI: 10.1080/03602532.2019.1632889] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cytochrome P450 2E1 (CYP2E1) plays a vital role in drug-induced hepatotoxicity and cancers (e.g. lung and bladder cancer), since it is responsible for metabolizing a number of medications and environmental toxins to reactive intermediate metabolites. CYP2E1 was recently found to be the highest expressed CYP enzyme in human livers using a proteomics approach, and CYP2E1-related toxicity is strongly associated with its protein level that shows significant inter-individual variability related to ethnicity, age, and sex. Furthermore, the expression of CYP2E1 demonstrates regulation by extensive genetic polymorphism, endogenous hormones, cytokines, xenobiotics, and varying pathological states. Over the past decade, the knowledge of pharmacology, toxicology, and biology about CYP2E1 has grown remarkably, but the research progress has yet to be summarized. This study presents a timely systematic review on CYP2E1's xenobiotic metabolism, genetic polymorphism, and inhibitors, with the focus on their clinical relevance for the efficacy and toxicity of various CYP2E1 substrates. Moreover, several knowledge gaps have been identified towards fully understanding the potential interactions among different CYP2E1 substrates in clinical settings. Through in-depth analyses of these knowns and unknowns, we expect this review will aid in future drug development and improve management of CYP2E1 related clinical toxicity.
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Affiliation(s)
- Jingxuan Chen
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Screening, Southern Medical University , Guangzhou , China
| | - Sibo Jiang
- Department of Pharmaceutics, University of Florida , Orlando , FL , USA
| | - Jin Wang
- AbbVie Inc , North Chicago , IL , USA
| | - Jwala Renukuntla
- School of Pharmacy, The University of Texas at El Paso , El Paso , TX , USA
| | - Suman Sirimulla
- School of Pharmacy, The University of Texas at El Paso , El Paso , TX , USA
| | - Jianjun Chen
- School of Pharmaceutical Sciences, Guangdong Provincial Key Laboratory of New Drug Screening, Southern Medical University , Guangzhou , China
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20
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Lang AL, Beier JI. Interaction of volatile organic compounds and underlying liver disease: a new paradigm for risk. Biol Chem 2019; 399:1237-1248. [PMID: 29924722 DOI: 10.1515/hsz-2017-0324] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 06/14/2018] [Indexed: 01/07/2023]
Abstract
Occupational and environmental exposures to industrial chemicals are known to cause hepatotoxicity and liver injury, in humans and in animal models. Historically, research has focused on severe acute liver injury (e.g. fulminant liver failure) or endstage diseases (e.g. cirrhosis and HCC). However, it has become recently recognized that toxicants can cause more subtle changes to the liver. For example, toxicant-associated steatohepatitis, characterized by hepatic steatosis, and inflammation, was recently recognized in an occupational cohort exposed to vinyl chloride. At high occupational levels, toxicants are sufficient to cause liver damage and disease even in healthy subjects with no comorbidities for liver injury. However, it is still largely unknown how exposure to toxicants initiate and possibly more importantly exacerbate liver disease, when combined with other factors, such as underlying non-alcoholic fatty liver disease caused by poor diet and/or obesity. With better understanding of the mechanism(s) and risk factors that mediate the initiation and progression of toxicant-induced liver disease, rational targeted therapy can be developed to better predict risk, as well as to treat or prevent this disease. The purpose of this review is to summarize established and proposed mechanisms of volatile organic compound-induced liver injury and to highlight key signaling events known or hypothesized to mediate these effects.
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Affiliation(s)
- Anna L Lang
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40292, USA.,Hepatobiology and Toxicology Program, University of Louisville, Louisville, KY 40292, USA.,University of Louisville Alcohol Research Center, University of Louisville Health Sciences Center, Louisville, KY 40292, USA
| | - Juliane I Beier
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40292, USA.,Hepatobiology and Toxicology Program, University of Louisville, Louisville, KY 40292, USA.,University of Louisville Alcohol Research Center, University of Louisville Health Sciences Center, Louisville, KY 40292, USA.,Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh, 200 Lothrop Street, Pittsburgh, PA 15213, USA
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21
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Teschke R. Aliphatic Halogenated Hydrocarbons: Report and Analysis of Liver Injury in 60 Patients. J Clin Transl Hepatol 2018; 6:350-361. [PMID: 30637211 PMCID: PMC6328725 DOI: 10.14218/jcth.2018.00040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/15/2018] [Accepted: 08/23/2018] [Indexed: 12/11/2022] Open
Abstract
Background and Aims: Intoxications by aliphatic halogenated hydrocarbons (AHH), used as effective solvents, are rare and may cause life-threatening liver injury. Patients with acute intoxications by AHH received an innovative treatment. Methods: Analyzed were data of 60 patients intoxicated by AHH, such as dichloromethane (n = 3), chloroform (n = 2), carbon tetrachloride (n = 12), 1,2-dichloroethane (n = 18), 1,1,2-trichloroethane (n = 2), trichloroethylene (n = 2), tetrachloroethylene (n = 13) or mixed AHH chemicals (n = 8), who received a new treatment consisting of CO2-induced hyperventilation to accelerate toxin removal via the lungs. Results: Added to the inspiration air at a flow rate of 2-3 Liter min-1, CO2 increased the respiratory volume up to 25-30 Liter min-1, ensuring forced AHH exhalation. This CO2-induced hyperventilation therapy was commonly well tolerated by the 60 patients and lasted for 106.0±10.5 hours. In most cases, initially increased liver test results of aminotransferases normalized quickly under the therapy, and liver histology obtained at completion of the therapy revealed, in the majority of patients, normal findings or fatty changes, and rarely severe single cell necrosis but no confluent liver cell necrosis. Despite therapy, clinical outcome was unfavorable for 4/60 patients (6.7%) of the study cohort, due to single or combined risk factors. These included late initiation of the CO2-induced hyperventilation therapy, intentional intoxication, uptake of high amounts of AHH, concomitant ingestion of overdosed drugs, consumption of high amounts of alcohol, and history of alcohol abuse. Conclusions: For intoxications by AHH, effective therapy approaches including forced hyperventilation to increase toxin removal via the lungs are available and require prompt initiation.
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Affiliation(s)
- Rolf Teschke
- Department of Internal Medicine II, Division of Gastroenterology and Hepatology, Klinikum Hanau, Hanau, Academic Teaching Hospital of the Medical Faculty, Goethe University Frankfurt/Main, Frankfurt/Main, Germany
- *Correspondence to: Rolf Teschke, Department of Internal Medicine II, Klinikum Hanau, Teaching Hospital of the Goethe University of Frankfurt/Main, Leimenstrasse 20, Hanau D-63450, Germany. Tel.: +49-6181-21859, Fax: +49-6181-2964211, E-mail:
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22
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Jin X, Liao Y, Tan X, Wang G, Zhao F, Jin Y. Involvement of CYP2E1 in the Course of Brain Edema Induced by Subacute Poisoning With 1,2-Dichloroethane in Mice. Front Pharmacol 2018; 9:1317. [PMID: 30524279 PMCID: PMC6262393 DOI: 10.3389/fphar.2018.01317] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 10/29/2018] [Indexed: 12/24/2022] Open
Abstract
This study was designed to explore the role of cytochrome P4502E1 (CYP2E1) expression in the course of brain edema induced by subacute poisoning with 1,2-dichloroethane (1,2-DCE). Mice were randomly divided into five groups: the control group, the 1,2-DCE poisoned group, and the low-, medium- and high-dose diallyl sulfide (DAS) intervention groups. The present study found that CYP2E1 expression levels in the brains of the 1,2-DCE-poisoned group were upregulated transcriptionally; in contrast, the levels were suppressed by DAS pretreatment in the intervention groups. In addition, the expression levels of both Nrf2 and HO-1 were also upregulated transcriptionally in the brains of the 1,2-DCE-poisoned group, while they were suppressed dose-dependently in the intervention groups. Moreover, compared with the control group, MDA levels and water contents in the brains of the 1,2-DCE-poisoned group increased, whereas NPSH levels and tight junction (TJ) protein levels decreased significantly. Conversely, compared with the 1,2-DCE- poisoned group, MDA levels and water contents in the brains of the intervention groups decreased, and NPSH levels and TJ protein levels increased significantly. Furthermore, pathological changes of brain edema observed in the 1,2-DCE-poisoned group were markedly improved in the intervention groups. Collectively, our results suggested that CYP2E1 expression could be transcriptionally upregulated in 1,2-DCE-poisoned mice, which might enhance 1,2-DCE metabolism in vivo, and induce oxidative damage and TJ disruption in the brain, ultimately leading to brain edema.
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Affiliation(s)
- Xiaoxia Jin
- Department of Environmental and Occupational Health, School of Public Health, China Medical University, Shenyang, China
| | - Yingjun Liao
- Department of Physiology, China Medical University, Shenyang, China
| | - Xiaoqiong Tan
- Department of Environmental and Occupational Health, School of Public Health, China Medical University, Shenyang, China
| | - Gaoyang Wang
- Department of Environmental and Occupational Health, School of Public Health, China Medical University, Shenyang, China
| | - Fenghong Zhao
- Department of Environmental and Occupational Health, School of Public Health, China Medical University, Shenyang, China
| | - Yaping Jin
- Department of Environmental and Occupational Health, School of Public Health, China Medical University, Shenyang, China
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23
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Oriakhi K, Uadia PO, Eze IG. Hepatoprotective potentials of methanol extract of T. conophorum seeds of carbon tetrachloride induced liver damage in Wistar rats. CLINICAL PHYTOSCIENCE 2018. [DOI: 10.1186/s40816-018-0085-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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24
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Association of NF-κB and AP-1 with MMP-9 Overexpression in 2-Chloroethanol Exposed Rat Astrocytes. Cells 2018; 7:cells7080096. [PMID: 30087244 PMCID: PMC6115792 DOI: 10.3390/cells7080096] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/03/2018] [Accepted: 08/03/2018] [Indexed: 01/18/2023] Open
Abstract
Subacute poisoning of 1,2-dichloroethane (1,2-DCE) has become a serious occupational problem in China, and brain edema is its main pathological consequence, but little is known about the underlying mechanisms. As the metabolite of 1,2-DCE, 2-chloroethanol (2-CE) is more reactive, and might play an important role in the toxic effects of 1,2-DCE. In our previous studies, we found that matrix metalloproteinases-9 (MMP-9) expression was enhanced in mouse brains upon treatment with 1,2-DCE, and in rat astrocytes exposed to 2-CE. In the present study, we analyzed the association of nuclear factor kappa B (NF-κB) and activator protein-1 (AP-1) with MMP-9 overexpression in astrocytes treated with 2-CE. MMP-9, p65, c-Jun, and c-Fos were significantly upregulated by 2-CE treatment, which also enhanced phosphorylation of c-Jun, c-Fos and inhibitor of κBα (IκBα), and nuclear translocation of p65. Furthermore, inhibition of IκBα phosphorylation and AP-1 activity with the specific inhibitors could attenuate MMP-9 overexpression in the cells. On the other hand, inhibition of p38 mitogen-activated protein kinase (p38 MAPK) signaling pathway suppressed the activation of both NF-κB and AP-1 in 2-CE-treated astrocytes. In conclusion, MMP-9 overexpression induced by 2-CE in astrocytes could be mediated at least in part through the p38 signaling pathway via activation of both NF-κB and AP-1. This study might provide novel clues for clarifying the mechanisms underlying 1,2-DCE associated cerebral edema.
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25
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Teschke R. Liver Injury by Carbon Tetrachloride Intoxication in 16 Patients Treated with Forced Ventilation to Accelerate Toxin Removal via the Lungs: A Clinical Report. TOXICS 2018; 6:E25. [PMID: 29702608 PMCID: PMC6027346 DOI: 10.3390/toxics6020025] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 04/17/2018] [Accepted: 04/20/2018] [Indexed: 12/14/2022]
Abstract
Carbon tetrachloride (CCl₄) is an efficient but highly toxic solvent, used in households and commercially in the industry under regulatory surveillance to ensure safety at the working place and to protect the workers’ health. However, acute unintentional or intentional intoxications by CCl₄ may rarely occur and are potentially life-threatening. In this review article, therapy options are discussed that are based on a literature review of traditional poisoning cases and the clinical experience with 16 patients with acute poisoning by CCl₄. Among various therapy options, the CO₂-induced hyperventilation therapy will be considered in detail as the most promising approach. This special therapy was developed because only around 1% of the intoxicating CCl₄ is responsible for the liver injury after conversion to toxic radicals via microsomal cytochrome P450 2E1 whereas 99% of the solvent will leave the body unchanged by exhalation. Therefore, to enhance CCl₄ elimination through the lungs, CO₂ is added to the inspiration air at a flow rate of 2⁻3 L min−1 in order to achieve hyperventilation with a respiratory volume of 25⁻30 L min−1. Under this therapy, the clinical course was favorable in 15/16 patients, corresponding to 93.8%. In essence, patients with acute CCl₄ intoxication should be treated by forced ventilation.
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Affiliation(s)
- Rolf Teschke
- Department of Internal Medicine II, Division of Gastroenterology and Hepatology, Klinikum Hanau, 63450 Hanau, Academic Teaching Hospital of the Medical Faculty, Goethe University Frankfurt/Main, 60323 Frankfurt/Main, Germany.
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26
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Wang T, Liao Y, Sun Q, Tang H, Wang G, Zhao F, Jin Y. Upregulation of Matrix Metalloproteinase-9 in Primary Cultured Rat Astrocytes Induced by 2-Chloroethanol Via MAPK Signal Pathways. Front Cell Neurosci 2017; 11:218. [PMID: 28769771 PMCID: PMC5516094 DOI: 10.3389/fncel.2017.00218] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 07/06/2017] [Indexed: 01/25/2023] Open
Abstract
2-Chloroethanol (2-CE) is one of the reactive metabolites of 1,2-DCE in vivo, which might contribute to brain edema formation induced by 1,2-dichloroethane (1,2-DCE) poisoning. Thus, the purpose of this study was to explore the roles of mitogen-activated protein kinase (MAPK) signal pathways in upregulation of matrix metalloproteinase-9 (MMP-9) in 2-CE exposed rat astrocytes. Expression of p38 MAPK (p38), extracellular signal regulated protein kinase (ERK), c-Jun N-terminal kinase (JNK) and MMP-9 at both protein and gene levels in rat astrocytes were determined using western blot and real-time RT-PCR methods. The results showed that both protein and mRNA levels of MMP-9 in 2-CE exposed astrocytes significantly increased. Meanwhile, protein levels of phosphorylated p38 (p-p38), ERK1/2 (p-ERK1/2) and JNK1/2 (p-JNK1/2) in 2-CE exposed astrocytes also significantly increased. In addition, both protein and mRNA levels of MMP-9 significantly decreased in response to reduced protein levels of p-p38, p-ERK1/2 and p-JNK1/2 achieved by supplement with their specific inhibitors, indicating that activation of MAPK signal pathways might play an important role in upregulation of MMP-9 expression at the transcriptional level in 2-CE exposed astrocytes. Furthermore, since pretreatment of n-acetyl-l-cysteine (NAC), a powerful antioxidant amino acid, could attenuate the elevated levels of MMP-9, p-p38, p-ERK2 and p-JNK1/2 in 2-CE exposed astrocytes, activation of MAPK signal pathways in 2-CE exposed astrocytes could be mediated partially by reactive oxygen species (ROS), which was most likely generated in the metabolism of 2-CE.
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Affiliation(s)
- Tong Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical UniversityShenyang, China
| | - Yingjun Liao
- Department of Physiology, China Medical UniversityShenyang, China
| | - Qi Sun
- Department of Occupational and Environmental Health, School of Public Health, China Medical UniversityShenyang, China
| | - Hongge Tang
- Department of Occupational and Environmental Health, School of Public Health, China Medical UniversityShenyang, China
| | - Gaoyang Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical UniversityShenyang, China
| | - Fenghong Zhao
- Department of Occupational and Environmental Health, School of Public Health, China Medical UniversityShenyang, China
| | - Yaping Jin
- Department of Occupational and Environmental Health, School of Public Health, China Medical UniversityShenyang, China
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Ijiri Y, Kato R, Sadamatsu M, Takano M, Yasuda Y, Tanaka F, Oishi C, Imano H, Okada Y, Tanaka K, Hayashi T. Contributions of caspase-8 and -9 to liver injury from CYP2E1-produced metabolites of halogenated hydrocarbons. Xenobiotica 2017; 48:60-72. [DOI: 10.1080/00498254.2016.1275881] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Yoshio Ijiri
- Cardiovascular Pharmacotherapy and Toxicology and
| | - Ryuji Kato
- Cardiovascular Pharmacotherapy and Toxicology and
| | | | - Mina Takano
- Pharmacotherapy II, Osaka University of Pharmaceutical Sciences, Nasahara, Takatsuki, Osaka, Japan,
| | - Yuki Yasuda
- Cardiovascular Pharmacotherapy and Toxicology and
| | | | - Chiyo Oishi
- Cardiovascular Pharmacotherapy and Toxicology and
| | - Hideki Imano
- Cardiovascular Pharmacotherapy and Toxicology and
| | - Yoshikatsu Okada
- Department of Pathology, Osaka Medical College, Daigaku-machi, Takatsuki, Osaka, Japan, and
| | - Kazuhiko Tanaka
- Kidney Center, Shirasagi Hospital, Kumata, Higashisumiyoshi-ku, Osaka, Japan
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Sun Q, Liao Y, Wang T, Tang H, Wang G, Zhao F, Jin Y. 2-Chloroethanol Induced Upregulation of Matrix Metalloproteinase-2 in Primary Cultured Rat Astrocytes Via MAPK Signal Pathways. Front Neurosci 2017; 10:593. [PMID: 28101000 PMCID: PMC5209348 DOI: 10.3389/fnins.2016.00593] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Accepted: 12/12/2016] [Indexed: 01/10/2023] Open
Abstract
This study was to explore the mechanisms underlying 1,2-dichloroethane (1,2-DCE) induced brain edema by focusing on alteration of matrix metalloproteinase-2 (MMP-2) in rat astrocytes induced by 2-chloroethanol (2-CE), an intermediate metabolite of 1,2-DCE in vivo. Protein and mRNA levels of MMP-2, and the phosphorylated protein levels of p38 MAPK (p-p38), extracellular signal regulated protein kinase (p-ERK1/2) and c-Jun N-terminal kinase (p-JNK1/2) in astrocytes were examined by immunostaining, western blot or real-time RT-PCR analysis. Findings from this study disclosed that protein levels of MMP-2 were upregulated by 2-CE in astrocytes. Meanwhile, protein levels of p-p38, p-ERK1/2 and p-JNK1/2 were also increased apparently in the cells treated with 2-CE. Moreover, pretreatment of astrocytes with SB202190 (inhibitor of p38 MAPK), U0126 (inhibitor of ERK1/2) or SP600125 (inhibitor of JNK1/2) could suppress the upregulated expression of p-p38, p-ERK1/2, and p-JNK1/2. In response to suppressed protein levels of p-p38 and p-JNK1/2, the protein levels of MMP-2 also decreased significantly, indicating that activation of MAPK signal pathways were involved in the mechanisms underlying 2-CE-induced upregulation of MMP-2 expression.
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Affiliation(s)
- Qi Sun
- Department of Occupational and Environmental Health, School of Public Health, China Medical University Shenyang, China
| | - Yingjun Liao
- Department of Physiology, China Medical University Shenyang, China
| | - Tong Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University Shenyang, China
| | - Hongge Tang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University Shenyang, China
| | - Gaoyang Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University Shenyang, China
| | - Fenghong Zhao
- Department of Occupational and Environmental Health, School of Public Health, China Medical University Shenyang, China
| | - Yaping Jin
- Department of Occupational and Environmental Health, School of Public Health, China Medical University Shenyang, China
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Villanueva CM, Gracia-Lavedan E, Bosetti C, Righi E, Molina AJ, Martín V, Boldo E, Aragonés N, Perez-Gomez B, Pollan M, Acebo IG, Altzibar JM, Zabala AJ, Ardanaz E, Peiró R, Tardón A, Chirlaque MD, Tavani A, Polesel J, Serraino D, Pisa F, Castaño-Vinyals G, Espinosa A, Espejo-Herrera N, Palau M, Moreno V, La Vecchia C, Aggazzotti G, Nieuwenhuijsen MJ, Kogevinas M. Colorectal Cancer and Long-Term Exposure to Trihalomethanes in Drinking Water: A Multicenter Case-Control Study in Spain and Italy. ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:56-65. [PMID: 27383820 PMCID: PMC5226692 DOI: 10.1289/ehp155] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 03/21/2016] [Accepted: 06/10/2016] [Indexed: 05/21/2023]
Abstract
BACKGROUND Evidence on the association between colorectal cancer and exposure to disinfection by-products in drinking water is inconsistent. OBJECTIVES We assessed long-term exposure to trihalomethanes (THMs), the most prevalent group of chlorination by-products, to evaluate the association with colorectal cancer. METHODS A multicenter case-control study was conducted in Spain and Italy in 2008-2013. Hospital-based incident cases and population-based (Spain) and hospital-based (Italy) controls were interviewed to ascertain residential histories, type of water consumed in each residence, frequency and duration of showering/bathing, and major recognized risk factors for colorectal cancer. We estimated adjusted odds ratios (OR) for colorectal cancer in association with quartiles of estimated average lifetime THM concentrations in each participant's residential tap water (micrograms/liter; from age 18 to 2 years before the interview) and estimated average lifetime THM ingestion from drinking residential tap water (micrograms/day). RESULTS We analyzed 2,047 cases and 3,718 controls. Median values (ranges) for average lifetime residential tap water concentrations of total THMs, chloroform, and brominated THMs were 30 (0-174), 17 (0-63), and 9 (0-145) μg/L, respectively. Total THM concentration in residential tap water was not associated with colorectal cancer (OR = 0.92, 95% CI: 0.66, 1.28 for highest vs. lowest quartile), but chloroform concentrations were inversely associated (OR = 0.31, 95% CI: 0.24, 0.41 for highest vs. lowest quartile). Brominated THM concentrations showed a positive association among men in the highest versus the lowest quartile (OR = 1.43, 95% CI: 0.83, 2.46). Patterns of association were similar for estimated average THM ingestion through residential water consumption. CONCLUSIONS We did not find clear evidence of an association between detailed estimates of lifetime total THM exposure and colorectal cancer in our large case-control study population. Negative associations with chloroform concentrations and ingestion suggest differences among specific THMs, but these findings should be confirmed in other study populations. Citation: Villanueva CM, Gracia-Lavedan E, Bosetti C, Righi E, Molina AJ, Martín V, Boldo E, Aragonés N, Perez-Gomez B, Pollan M, Gomez Acebo I, Altzibar JM, Jiménez Zabala A, Ardanaz E, Peiró R, Tardón A, Chirlaque MD, Tavani A, Polesel J, Serraino D, Pisa F, Castaño-Vinyals G, Espinosa A, Espejo-Herrera N, Palau M, Moreno V, La Vecchia C, Aggazzotti G, Nieuwenhuijsen MJ, Kogevinas M. 2017. Colorectal cancer and long-term exposure to trihalomethanes in drinking water: a multicenter case---control study in Spain and Italy. Environ Health Perspect 125:56-65; http://dx.doi.org/10.1289/EHP155.
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Affiliation(s)
- Cristina M. Villanueva
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Address correspondence to C.M. Villanueva, Centre for Research in Environmental Epidemiology (CREAL), Doctor Aiguader, 88, 08003 Barcelona, Spain. Telephone: 34 93 214 73 44. E-mail:
| | - Esther Gracia-Lavedan
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Cristina Bosetti
- Department of Epidemiology, IRCCS (Istituto di Ricerche Farmacologiche Mario Negri), Milan, Italy
| | - Elena Righi
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Antonio José Molina
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Department of Preventive Medicine and Public Health, University of León, León, Spain
| | - Vicente Martín
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Department of Preventive Medicine and Public Health, University of León, León, Spain
| | - Elena Boldo
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Cancer and Environmental Epidemiology Unit, National Centre for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Cancer Epidemiology Research Group, Oncology and Hematology Area, IIS (Instituto de Investigación Sanitaria) Puerta De Hierro, Madrid, Spain
| | - Nuria Aragonés
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Cancer and Environmental Epidemiology Unit, National Centre for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Cancer Epidemiology Research Group, Oncology and Hematology Area, IIS (Instituto de Investigación Sanitaria) Puerta De Hierro, Madrid, Spain
| | - Beatriz Perez-Gomez
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Cancer and Environmental Epidemiology Unit, National Centre for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Cancer Epidemiology Research Group, Oncology and Hematology Area, IIS (Instituto de Investigación Sanitaria) Puerta De Hierro, Madrid, Spain
| | - Marina Pollan
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Cancer and Environmental Epidemiology Unit, National Centre for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Cancer Epidemiology Research Group, Oncology and Hematology Area, IIS (Instituto de Investigación Sanitaria) Puerta De Hierro, Madrid, Spain
| | - Ines Gomez Acebo
- Department of Preventive Medicine and Public Health, University of Cantabria, Santander, Spain
- IDIVAL (Instituto de Investigación Sanitaria Valdecilla), Santander, Spain
- Centre for Research in Public Health, Valencia, Spain
| | - Jone M. Altzibar
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Public Health Division of Gipuzkoa, Biodonostia Research Institute, San Sebastian, Spain
| | - Ana Jiménez Zabala
- Public Health Division of Gipuzkoa, Biodonostia Research Institute, San Sebastian, Spain
| | - Eva Ardanaz
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Instituto de Salud Pública y Laboral de Navarra, Pamplona, Spain
| | - Rosana Peiró
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Centre for Research in Public Health, Valencia, Spain
| | - Adonina Tardón
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Oncology Institute IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Universidad de Oviedo, Asturias, Spain
| | - Maria Dolores Chirlaque
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Department of Epidemiology, Murcia Regional Health Council, IMIB-Arrixaca (Biomedical Research Institute of Murcia), Murcia, Spain
| | - Alessandra Tavani
- Department of Epidemiology, IRCCS (Istituto di Ricerche Farmacologiche Mario Negri), Milan, Italy
| | - Jerry Polesel
- Unit of Epidemiology and Biostatistics, CRO (Centro di Riferimento Oncologico) Aviano National Cancer Institute, IRCCS, Aviano, Italy
| | - Diego Serraino
- Unit of Epidemiology and Biostatistics, CRO (Centro di Riferimento Oncologico) Aviano National Cancer Institute, IRCCS, Aviano, Italy
| | - Federica Pisa
- Institute of Hygiene and Clinical Epidemiology, University Hospital of Udine, Udine, Italy
- Department of Biological and Medical Sciences, University of Udine, Udine, Italy
| | - Gemma Castaño-Vinyals
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Ana Espinosa
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Nadia Espejo-Herrera
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Margarita Palau
- General Division of Public Health, Quality and Innovation, Ministry of Health, Social Services and Equity, Madrid, Spain
| | - Victor Moreno
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
- Department of Clinical Sciences, University of Barcelona, Barcelona, Spain
| | - Carlo La Vecchia
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Gabriella Aggazzotti
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Mark J Nieuwenhuijsen
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Manolis Kogevinas
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
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Sun Q, Wang G, Gao L, Shi L, Qi Y, Lv X, Jin Y. Roles of CYP2e1 in 1,2-dichloroethane-induced liver damage in mice. ENVIRONMENTAL TOXICOLOGY 2016; 31:1430-1438. [PMID: 25926354 DOI: 10.1002/tox.22148] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Revised: 04/03/2015] [Accepted: 04/11/2015] [Indexed: 06/04/2023]
Abstract
The aim of this study was to explore the roles of cytochrome P450 2E1 (CYP2E1) in 1,2-dichloroethane (1,2-DCE)-induced liver damage. Two parts were included in this study: first, effect of 1,2-DCE on microsomal expression of CYP2E1, and second, potential of an inhibitor of CYP2E1 to reduce 1,2-DCE-induced liver damage. In part one, mice were exposed to 0, 0.225, 0.45, or 0.9 g/m3 1,2-DCE for 10 days, 3.5 h per day through static inhalation. In part two, mice were divided into blank control, solvent control, inhibitor control, 1,2-DCE-poisoned group, and low or high intervention group. In part one, compared to the control, serum alanine aminotransferase (ALT) activities and hepatic malondialdehyde (MDA) levels in 0.9 g/m3 1,2-DCE group, and microsomal CYP2E1 protein expression and activity in both 0.45 and 0.9 g/m3 1,2-DCE groups increased significantly; conversely, hepatic nonprotein sulfhydryl (NPSH) levels in both 0.45 and 0.9 g/m3 1,2-DCE groups and hepatic SOD activities in 0.9 g/m3 1,2-DCE group decreased significantly. In part two, microsomal CYP2E1 protein expression and activity decreased significantly in both low and high intervention groups compared to 1,2-DCE-poisoned group. Along with the changes of CYP2E1, hepatic MDA levels and serum ALT activities decreased; conversely, hepatic NPSH levels and SOD activities increased significantly in high intervention group. Taken together, our results suggested that 1,2-DCE could enhance CYP2E1 protein expression and enzymatic activity, which could cause oxidative damage in liver, serving as an important mechanism underlying 1,2-DCE-induced liver damage. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 1430-1438, 2016.
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Affiliation(s)
- Qi Sun
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Gaoyang Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Lanyue Gao
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Lei Shi
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Ying Qi
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Xiuqiang Lv
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Yaping Jin
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China.
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Sun Q, Liao Y, Wang T, Wang G, Zhao F, Jin Y. Alteration in mitochondrial function and glutamate metabolism affected by 2-chloroethanol in primary cultured astrocytes. Toxicol In Vitro 2016; 37:50-60. [PMID: 27596522 DOI: 10.1016/j.tiv.2016.09.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 08/08/2016] [Accepted: 09/01/2016] [Indexed: 02/08/2023]
Abstract
The aim of this study was to explore the mechanisms that contribute to 1,2-dichloroethane (1,2-DCE) induced brain edema by focusing on alteration of mitochondrial function and glutamate metabolism in primary cultured astrocytes induced by 2-chloroethanol (2-CE), a metabolite of 1,2-DCE in vivo. The cells were exposed to different levels of 2-CE in the media for 24h. Mitochondrial function was evaluated by its membrane potential and intracellular contents of ATP, lactic acid and reactive oxygen species (ROS). Glutamate metabolism was indicated by expression of glutamine synthase (GS), glutamate-aspartate transporter (GLAST) and glutamate transporter-1 (GLT-1) at both protein and gene levels. Compared to the control group, exposure to 2-CE could cause a dose dependent damage in astrocytes, indicated by decreased cell viability and morphological changes, and supported by decreased levels of nonprotein sulfhydryl (NPSH) and inhibited activities of Na+/K+-ATPase and Ca2+-ATPase in the cells. The present study also revealed both mitochondrial function and glutamate metabolism in astrocytes were significantly disturbed by 2-CE. Of which, mitochondrial function was much vulnerable to the effects of 2-CE. In conclusion, our findings suggested that mitochondrial dysfunction and glutamate metabolism disorder could contribute to 2-CE-induced cytotoxicity in astrocytes, which might be related to 1,2-DCE-induced brain edema.
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Affiliation(s)
- Qi Sun
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Yingjun Liao
- Department of Physiology, China Medical University, People's Republic of China
| | - Tong Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Gaoyang Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Fenghong Zhao
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Yaping Jin
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China.
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Ganie SA, Ali Dar T, Zargar S, Bhat AH, Dar KB, Masood A, Zargar MA. Crataegus songarica methanolic extract accelerates enzymatic status in kidney and heart tissue damage in albino rats and its in vitro cytotoxic activity. PHARMACEUTICAL BIOLOGY 2016; 54:1246-1254. [PMID: 26428528 DOI: 10.3109/13880209.2015.1066398] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
CONTEXT Crataegus songarica K. Koch (Rosaceae) has been used in folk medicine to treat various diseases. OBJECTIVE This study evaluates the effect of C. songarica methanol extract on the kidney and heart tissue damage of albino rats, and to determine cytotoxic activity of various extracts of songarica on various human cancer cell lines. MATERIALS AND METHODS Rats were divided into six groups, Group I received water only; Group II received CCl4 (1 mL/kg b wt) intraperitoneal; C. songarica extract (at doses of 100, 200 and 300 mg/kg b wt) orally for 15 days. Cytotoxic activity was determined by SRB method using MCF-7, HeLa, HepG2, SF-295, SW480 and IMR-32 cell lines. RESULTS Compared with CCl4 group, administration of C. songarica extract at the dose of 300 mg/kg b wt, significantly decreases serum creatinine (59.74%), urea (40.23%) and cholesterol (54 mg/dL), MDA (0.007 nmol/mg protein) in kidney and (0.025 nmol/mg protein) in heart tissue, along with evaluation of GSH (209.79 ± 54.6), GR (111.45 ± 2.84), GPx (94.01 ± 14.80), GST (201.71) in kidney tissue and GSH (51.47 ± 1.47), GR (45.42 ± 6.69), GPx (77.19 ± 10.94), GST (49.89) in heart tissue. In addition, methanol, ethanol and ethyl acetate extracts exhibited potent anticancer activity on six cancer cell lines with IC50 values ranging from 28.57 to 85.106 µg/mL. DISCUSSION AND CONCLUSION Crataegus songarica methanol extract has a potential antioxidant effect as it protects the kidney and heart tissue against CCl4-induced toxicity, prevents DNA damage and showed strong anticancer activity.
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Affiliation(s)
| | | | - Sabuhi Zargar
- b Department of Biochemistry , University of Kashmir , Srinagar , India
| | | | | | - Akbar Masood
- b Department of Biochemistry , University of Kashmir , Srinagar , India
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Zhang MX, Liu K, Wang FG, Wen XW, Song XL. Association between CYP2E1 polymorphisms and risk of gastric cancer: An updated meta-analysis of 32 case-control studies. Mol Clin Oncol 2016; 4:1031-1038. [PMID: 27284439 DOI: 10.3892/mco.2016.824] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 03/03/2016] [Indexed: 01/01/2023] Open
Abstract
Previous studies suggested that RsaI/PstI and DraI polymorphisms on cytochrome P450 2E1 (CYP2E1) may be associated with susceptibility to gastric cancer (GC). However, this association remains ambiguous. A meta-analysis of previously published studies was performed in an attempt to elucidate this association. The odds ratio and 95% confidence interval were used to assess the strength of the association. In the overall analyses of RsaI/PstI and DraI, no association was identified. In the subgroup analyses, RsaI/PstI was identified to increase the risk of GC in the smoking population. In addition, in the previous studies of interactions with other genes, RsaI/PstI was revealed to be associated with increased GC risks when glutathione S-transferase-µ-1 or glutathione S-transferase θ-1 was null or DraI was homozygous wild-type. However, these stratified analyses were lacking credibility due to the limitation of correlational study numbers. In conclusion, CYP2E1 polymorphisms revealed no association with the risk of GC.
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Affiliation(s)
- Ming-Xing Zhang
- Department of Gastrointestinal Surgery, Shandong Cancer Hospital and Institute, Jinan, Shandong 250117, P.R. China; Department of Gastrointestinal Surgery, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China
| | - Kai Liu
- Department of Gastrointestinal Surgery, Shandong Cancer Hospital and Institute, Jinan, Shandong 250117, P.R. China
| | - Fu-Gang Wang
- Department of Gastrointestinal Surgery, Shandong Cancer Hospital and Institute, Jinan, Shandong 250117, P.R. China
| | - Xiao-Wen Wen
- Department of Gastrointestinal Surgery, Shandong Cancer Hospital and Institute, Jinan, Shandong 250117, P.R. China
| | - Xi-Lin Song
- Department of Gastrointestinal Surgery, Shandong Cancer Hospital and Institute, Jinan, Shandong 250117, P.R. China
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Therapeutic Effect of Losartan, an Angiotensin II Type 1 Receptor Antagonist, on CCl₄-Induced Skeletal Muscle Injury. Int J Mol Sci 2016; 17:227. [PMID: 26867195 PMCID: PMC4783959 DOI: 10.3390/ijms17020227] [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] [Received: 12/31/2015] [Revised: 02/01/2016] [Accepted: 02/03/2016] [Indexed: 12/17/2022] Open
Abstract
TGF-β1 is known to inhibit muscle regeneration after muscle injury. However, it is unknown if high systemic levels of TGF-β can affect the muscle regeneration process. In the present study, we demonstrated the effect of a CCl₄ intra-peritoneal injection and losartan (an angiotensin II type 1 receptor antagonist) on skeletal muscle (gastrocnemius muscle) injury and regeneration. Male C57BL/6 mice were grouped randomly as follows: control (n = 7), CCl₄-treatment group (n = 7), and CCl₄ + losartan treatment group (n = 7). After CCl₄ treatment for a 16-week period, the animals were sacrificed and analyzed. The expression of dystrophin significantly decreased in the muscle tissues of the control group, as compared with that of the CCl₄ + losartan group (p < 0.01). p(phospho)-Smad2/3 expression significantly increased in the muscles of the control group compared to that in the CCl₄ + losartan group (p < 0.01). The expressions of Pax7, MyoD, and myogenin increased in skeletal muscles of the CCl₄ + losartan group compared to the corresponding levels in the control group (p < 0.01). We hypothesize that systemically elevated TGF-β1 as a result of CCl₄-induced liver injury causes skeletal muscle injury, while losartan promotes muscle repair from injury via blockade of TGF-β1 signaling.
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McKillop IH, Schrum LW, Thompson KJ. Role of alcohol in the development and progression of hepatocellular carcinoma. Hepat Oncol 2016; 3:29-43. [PMID: 30191025 PMCID: PMC6095421 DOI: 10.2217/hep.15.40] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 10/22/2015] [Indexed: 02/06/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a significant cause of cancer-related morbidity and mortality. Chronic, heavy ethanol consumption is a major risk for developing the worsening liver pathologies that culminate in hepatic cirrhosis, the leading risk factor for developing HCC. A significant body of work reports the biochemical and pathological consequences of ethanol consumption and metabolism during hepatocarcinogeneis. The systemic effects of ethanol means organ system interactions are equally important in understanding the initiation and progression of HCC within the alcoholic liver. This review aims to summarize the effects of ethanol-ethanol metabolism during the pathogenesis of alcoholic liver disease, the progression toward HCC and the importance of ethanol as a comorbid factor for HCC development.
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Affiliation(s)
- Iain H McKillop
- Department of Surgery, Carolinas Medical Center, Charlotte, NC 28203 USA
| | - Laura W Schrum
- Department of Medicine, Carolinas Medical Center, Charlotte, NC 28203 USA
| | - Kyle J Thompson
- Department of Surgery, Carolinas Medical Center, Charlotte, NC 28203 USA
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Autophagy Protects against CYP2E1/Chronic Ethanol-Induced Hepatotoxicity. Biomolecules 2015; 5:2659-74. [PMID: 26501338 PMCID: PMC4693252 DOI: 10.3390/biom5042659] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 10/09/2015] [Accepted: 10/09/2015] [Indexed: 02/07/2023] Open
Abstract
Autophagy is an intracellular pathway by which lysosomes degrade and recycle long-lived proteins and cellular organelles. The effects of ethanol on autophagy are complex but recent studies have shown that autophagy serves a protective function against ethanol-induced liver injury. Autophagy was found to also be protective against CYP2E1-dependent toxicity in vitro in HepG2 cells which express CYP2E1 and in vivo in an acute alcohol/CYPE1-dependent liver injury model. The goal of the current report was to extend the previous in vitro and acute in vivo experiments to a chronic ethanol model to evaluate whether autophagy is also protective against CYP2E1-dependent liver injury in a chronic ethanol-fed mouse model. Wild type (WT), CYP2E1 knockout (KO) or CYP2E1 humanized transgenic knockin (KI), mice were fed an ethanol liquid diet or control dextrose diet for four weeks. In the last week, some mice received either saline or 3-methyladenine (3-MA), an inhibitor of autophagy, or rapamycin, which stimulates autophagy. Inhibition of autophagy by 3-MA potentiated the ethanol-induced increases in serum transaminase and triglyceride levels in the WT and KI mice but not KO mice, while rapamycin prevented the ethanol liver injury. Treatment with 3-MA enhanced the ethanol-induced fat accumulation in WT mice and caused necrosis in the KI mice; little or no effect was found in the ethanol-fed KO mice or any of the dextrose-fed mice. 3-MA treatment further lowered the ethanol-decrease in hepatic GSH levels and further increased formation of TBARS in WT and KI mice, whereas rapamycin blunted these effects of ethanol. Neither 3-MA nor rapamycin treatment affected CYP2E1 catalytic activity or content or the induction CYP2E1 by ethanol. The 3-MA treatment decreased levels of Beclin-1 and Atg 7 but increased levels of p62 in the ethanol-fed WT and KI mice whereas rapamycin had the opposite effects, validating inhibition and stimulation of autophagy, respectively. These results suggest that autophagy is protective against CYP2E1-dependent liver injury in a chronic ethanol-fed mouse model. We speculate that autophagy-dependent processes such as mitophagy and lipophagy help to minimize ethanol-induced CYP2E1-dependent oxidative stress and therefore the subsequent liver injury and steatosis. Attempts to stimulate autophagy may be helpful in lowering ethanol and CYP2E1-dependent liver toxicity.
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Ramos-Pérez C, Lorenzo-Castrillejo I, Quevedo O, García-Luis J, Matos-Perdomo E, Medina-Coello C, Estévez-Braun A, Machín F. Yeast cytotoxic sensitivity to the antitumour agent β-lapachone depends mainly on oxidative stress and is largely independent of microtubule- or topoisomerase-mediated DNA damage. Biochem Pharmacol 2014; 92:206-19. [DOI: 10.1016/j.bcp.2014.09.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 09/09/2014] [Accepted: 09/09/2014] [Indexed: 01/15/2023]
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Romashov LV, Khemchyan LL, Gordeev EG, Koshevoy IO, Tunik SP, Ananikov VP. Design of a Bimetallic Au/Ag System for Dechlorination of Organochlorides: Experimental and Theoretical Evidence for the Role of the Cluster Effect. Organometallics 2014. [DOI: 10.1021/om500620u] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Leonid V. Romashov
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
| | - Levon L. Khemchyan
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
| | - Evgeniy G. Gordeev
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
| | - Igor O. Koshevoy
- Department
of Chemistry, Saint Petersburg State University, Stary Petergof 198504, Russia
- Department
of Chemistry, University of Eastern Finland, Joensuu 80101, Finland
| | - Sergey P. Tunik
- Department
of Chemistry, Saint Petersburg State University, Stary Petergof 198504, Russia
| | - Valentine P. Ananikov
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
- Department
of Chemistry, Saint Petersburg State University, Stary Petergof 198504, Russia
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Cederbaum AI. Methodology to assay CYP2E1 mixed function oxidase catalytic activity and its induction. Redox Biol 2014; 2:1048-54. [PMID: 25454746 PMCID: PMC4297943 DOI: 10.1016/j.redox.2014.09.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 09/29/2014] [Accepted: 09/30/2014] [Indexed: 01/06/2023] Open
Abstract
The cytochrome P450 mixed function oxidase enzymes are the major catalysts involved in drug metabolism. There are many forms of P450. CYP2E1 metabolizes many toxicologically important compounds including ethanol and is active in generating reactive oxygen species. Since several of the contributions in the common theme series “Role of CYP2E1 and Oxidative/Nitrosative Stress in the Hepatotoxic Actions of Alcohol” discuss CYP2E1, this methodology review describes assays on how CYP2E1 catalytic activity and its induction by ethanol and other inducers can be measured using substrate probes such as the oxidation of para-nitrophenol to para-nitrocatechol and the oxidation of ethanol to acetaldehyde. Approaches to validate that a particular reaction e.g. oxidation of a drug or toxin is catalyzed by CYP2E1 or that induction of that reaction is due to induction of CYP2E1 are important and specific examples using inhibitors of CYP2E1, anti-CYP2E1 IgG or CYP2E1 knockout and knockin mice will be discussed. Cytochrome P4502E1(CYP2E1) oxidizes ethanol and activates hepatoxins and procarcinogens. CYP2E1 produces reactive oxygen species during its catalytic cycle. Methodology to assay CYP2E1 via oxidation of ethanol and p-nitrophenol is reviewed. Oxidation of these substrates is enhanced after induction of CYP2E1 by ethanol. Oxidation of these substrates is lowered by CYP2E1 inhibitors, anti-CYP2E1 IgG and in CYP2E1 knockout mice.
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Affiliation(s)
- Arthur I Cederbaum
- Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, Box 1603, One Gustave L. Levy Place, New York, NY 10029, USA.
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Manzetti S, van der Spoel ER, van der Spoel D. Chemical Properties, Environmental Fate, and Degradation of Seven Classes of Pollutants. Chem Res Toxicol 2014; 27:713-37. [DOI: 10.1021/tx500014w] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sergio Manzetti
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
of Cell and Molecular Biology, University of Uppsala, Box 596, SE-75124 Uppsala, Sweden
- Fjordforsk A.S., Midtun, 6894 Vangsnes, Norway
| | - E. Roos van der Spoel
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
of Cell and Molecular Biology, University of Uppsala, Box 596, SE-75124 Uppsala, Sweden
| | - David van der Spoel
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
of Cell and Molecular Biology, University of Uppsala, Box 596, SE-75124 Uppsala, Sweden
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Ijiri Y, Kato R, Sadamatsu M, Takano M, Okada Y, Tanaka K, Hayashi T. Chronological changes in circulating levels of soluble tumor necrosis factor receptors 1 and 2 in rats with carbon tetrachloride-induced liver injury. Toxicology 2014; 316:55-60. [PMID: 24389507 DOI: 10.1016/j.tox.2013.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 12/06/2013] [Accepted: 12/22/2013] [Indexed: 11/19/2022]
Abstract
Carbon tetrachloride (CCl₄) facilitates the generation of hepatotoxins that can result in morphologic abnormalities, and these abnormalities are reasonably characteristic and reproducible for each particular toxin. It is also known that tumor necrosis factor-alpha (TNF-α) may participate in CCl₄-induced liver injury (CILI). In this study, we observed the chronological changes in circulating soluble tumor necrosis factor receptors 1 and 2 (sTNF-R1 and -R2) in rats with CILI. Laboratory data; circulating levels of TNF-α, sTNF-R1, and sTNF-R2; and TNF-α levels in liver tissues were measured at various time-points. In the CCl₄ group, the plasma aspartate aminotransferase (AST, 7694±3041IU/l)/alanine aminotransferase (ALT, 3241±2159 IU/l) levels peaked at 48 h after CCl₄ administration, but the other laboratory data did not differ significantly from the corresponding data in the controls. Centrilobular hepatocyte necrosis and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-positive cells near the central vein area were observed via hematoxylin eosin (HE) and TUNEL staining, respectively, at 24 and 48 h after CCl₄ administration. Compared to the control group, the CCl₄ group did not show significantly the increased circulating TNF-α levels. But TNF-α levels in the liver tissues first peaked at 1h (5261±2253 pg/g liver), and a second peak was observed at 12h (3806±533 pg/g liver) after CCl₄ administration. Compared to the control group, the CCl₄ group showed significantly increased circulating levels of both sTNF-R1 (797±121pg/ml) and sTNF-R2 (5696±626 pg/ml) 1h after CCl₄ administration. Since the hepatocyte apoptosis may be resulted from binding of TNF-α with TNF-R1 at 24h after administration, and consequently the circulating TNF-R2 level might be approximately 10-fold higher than the circulating TNF-R1 level. In conclusion, increased circulating levels of sTNF-R1 and -R2 potentially contribute to drug-induced liver injury, together with AST/ALT.
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Affiliation(s)
- Yoshio Ijiri
- Cardiovascular Pharmacotherapy and Toxicology, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan.
| | - Ryuji Kato
- Cardiovascular Pharmacotherapy and Toxicology, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
| | - Maiko Sadamatsu
- Cardiovascular Pharmacotherapy and Toxicology, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
| | - Mina Takano
- Pharmacotherapy II, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
| | - Yoshikatsu Okada
- Department of Pathology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - Kazuhiko Tanaka
- Kidney Center, Shirasagi Hospital, 7-11-23 Kumata, Higashisumiyoshi-ku, Osaka 546-0002, Japan
| | - Tetsuya Hayashi
- Cardiovascular Pharmacotherapy and Toxicology, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
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Wu D, Cederbaum AI. Inhibition of autophagy promotes CYP2E1-dependent toxicity in HepG2 cells via elevated oxidative stress, mitochondria dysfunction and activation of p38 and JNK MAPK. Redox Biol 2013; 1:552-65. [PMID: 24273738 PMCID: PMC3836279 DOI: 10.1016/j.redox.2013.10.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 10/27/2013] [Indexed: 02/07/2023] Open
Abstract
Autophagy has been shown to be protective against drug and alcohol-induced liver injury. CYP2E1 plays a role in the toxicity of ethanol, carcinogens and certain drugs. Inhibition of autophagy increased ethanol-toxicity and accumulation of fat in wild type and CYP2E1 knockin mice but not in CYP2E1 knockout mice as well as in HepG2 cells expressing CYP2E1 (E47 cells) but not HepG2 cells lacking CYP2E1 (C34 cells). The goal of the current study was to evaluate whether modulation of autophagy can affect CYP2E1-dependent cytotoxicity in the E47 cells. The agents used to promote CYP2E1 -dependent toxicity were a polyunsaturated fatty acid, arachidonic acid (AA), buthionine sulfoximine (BSO), which depletes GSH, and CCl4, which is metabolized to the CCl3 radical. These three agents produced a decrease in E47 cell viability which was enhanced upon inhibition of autophagy by 3-methyladenine (3-MA) or Atg 7 siRNA. Toxicity was lowered by rapamycin which increased autophagy and was much lower to the C34 cells which do not express CYP2E1. Toxicity was mainly necrotic and was associated with an increase in reactive oxygen production and oxidative stress; 3-MA increased while rapamycin blunted the oxidative stress. The enhanced toxicity and ROS formation produced when autophagy was inhibited was prevented by the antioxidant N-Acetyl cysteine. AA, BSO and CCl4 produced mitochondrial dysfunction, lowered cellular ATP levels and elevated mitochondrial production of ROS. This mitochondrial dysfunction was enhanced by inhibition of autophagy with 3-MA but decreased when autophagy was increased by rapamycin. The mitogen activated protein kinases p38 MAPK and JNK were activated by AA especially when autophagy was inhibited and chemical inhibitors of p38 MAPK and JNK lowered the elevated toxicity of AA produced by 3-MA. These results show that autophagy was protective against the toxicity produced by several agents known to be activated by CYP2E1. Since CYP2E1 plays an important role in the toxicity of ethanol, drugs and carcinogens and is activated under various pathophysiological conditions such as diabetes, NASH and obesity, attempts to stimulate autophagy may be beneficial in preventing/lowering CYP2E1/ethanol liver injury.
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Key Words
- 3-MA, 3-methyadenine
- AA, arachidonic acid
- Autophagy
- BSO, L-buthionine sulfoximine
- C34 cells, HepG2 cells which do not express CYP2E1
- CCl4, carbon tetrachloride
- CYP2E1
- CYP2E1, cytochrome P4502E1, E47 cells, HepG2 cells which express CYP2E1
- Cox IV, cytochrome oxidase subunit 4
- Cytotoxicity
- DCFDA, 2′-7′-dichlorofluorescin-diacetate
- GSH, reduced glutathione
- JNK
- MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium-bromide
- Mitochondria dysfunction
- NAC, N-acetyl-cysteine
- P38 MAPK
- ROS
- ROS, reactive oxygen species
- Rap, rapamycin
- SOD, superoxide dismutase
- TBARs, thiobarbituric acid-reactive substances
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Affiliation(s)
| | - Arthur I. Cederbaum
- Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, Box 1603, One Gustave L. Levy Place, New York, NY 10029, USA
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Schmidt T, Bertermann R, Rusch GM, Tveit A, Dekant W. Biotransformation of trans-1-chloro-3,3,3-trifluoropropene (trans-HCFO-1233zd). Toxicol Appl Pharmacol 2013; 268:343-51. [DOI: 10.1016/j.taap.2013.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 02/06/2013] [Accepted: 02/08/2013] [Indexed: 11/28/2022]
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Zgheib NK, Shamseddine AA, Geryess E, Tfayli A, Bazarbachi A, Salem Z, Shamseddine A, Taher A, El-Saghir NS. Genetic polymorphisms of CYP2E1, GST, and NAT2 enzymes are not associated with risk of breast cancer in a sample of Lebanese women. Mutat Res 2013; 747-748:40-7. [PMID: 23628324 DOI: 10.1016/j.mrfmmm.2013.04.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 03/25/2013] [Accepted: 04/19/2013] [Indexed: 11/28/2022]
Abstract
Changes in the activity of drug metabolizing enzymes (DMEs) are potentially associated with cancer risk. This relationship is attributed to their involvement in the bioactivation of multiple procarcinogens or the metabolism of multiple substrates including an array of xenobiotics and environmental carcinogens. 326 Lebanese women of whom 99 were cancer free (controls) and 227 were diagnosed with breast cancer (cases) were included. Blood for DNA was collected and medical charts were reviewed. Three genotyping methods were employed including: (1) restriction fragment length polymorphism (RFLP) for CYP2E1*5B, CYP2E1*6, NAT2*5 and NAT2*6; (2) gel electrophoresis for GSTM1 and GSTT1; and (3) real-time PCR for GSTP1 Ile/Val polymorphism. We analyzed the relationship between genetic susceptibilities in selected xenobiotic metabolizing genes and breast cancer risk. Allele frequencies were fairly similar to previously reported values from neighboring populations with relevant migration routes. There were no statistically significant differences in the distribution of variant carcinogen metabolizing genes between cases and controls even after adjusting for age at diagnosis, menopausal status, smoking, and alcohol intake. Despite its limitations, this is the first study that assesses the role of genetic polymorphisms in DMEs with breast cancer in a sample of Lebanese women. Further studies are needed to determine the genetic predisposition and gene-environment interactions of breast cancer in this population.
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Affiliation(s)
- Nathalie K Zgheib
- Department of Pharmacology & Toxicology, Faculty of Medicine, American University of Beirut, Lebanon.
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Delimitreva S, Wedi E, Bakker J, Tkachenko OY, Nikolova V, Nayudu PL. Numerical chromosome disorders in the common marmoset (Callithrix jacchus)--comparison between two captive colonies. J Med Primatol 2013; 42:177-85. [PMID: 23600894 DOI: 10.1111/jmp.12050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND Chromosomal analyses were performed for marmosets from two colonies - Deutsches Primatenzentrum (DPZ) and Biomedical Primate Research Centre (BPRC). Chlorine-based disinfectants are used in DPZ; no chemical disinfection is applied in BPRC. METHODS The rates of chromosomal non-disjunction, polyploidy and endoreduplication were investigated after G-banding. RESULTS For DPZ monkeys, the mean rates of non-disjunction were 7.6% for bone marrow and 11.3% for lymphocytes. The polyploidy level was 2.5% in bone marrow and 0.8% in blood. Frequency of endoreduplication in bone marrow and in leucocytes was 0.5% and 0.8%, respectively. For BPRC, the rate of non-disjunction in leucocytes (1.3%) was significantly lower than that for DPZ; the polyploidy rate (0.2%) in blood was lower than that in DPZ; endoreduplication was not observed. CONCLUSION The levels of chromosomal disorders are elevated for DPZ colony. We suggest that the increased rate of chromosomal disorders in DPZ marmosets can be related to the chemical disinfection of their environment.
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Affiliation(s)
- S Delimitreva
- Laboratory of Reproductive Biomedicine, German Primate Center, Goettingen, Germany.
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Jeong SC, Kim SM, Jeong YT, Song CH. Hepatoprotective effect of water extract from Chrysanthemum indicum L. flower. Chin Med 2013; 8:7. [PMID: 23557275 PMCID: PMC3621690 DOI: 10.1186/1749-8546-8-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 04/01/2013] [Indexed: 01/28/2023] Open
Abstract
Background Chrysanthemum indicum L. flower (CIF) has been widely used as tea in Korea. This study aims to investigate the hepatoprotective effect of the hot water extract of CIF (HCIF) in in vitro and in vivo systems. Methods Hepatoprotective activities were evaluated at 250 to 1000 μg/mL concentrations by an in vitro assay using normal human hepatocytes (Chang cell) and hepatocellular carcinoma cells (HepG2) against CCl4-induced cytotoxicity. Cytochrome P450 2E1, which is a key indicator of hepatic injury, was detected by western blot analysis using rabbit polyclonal anti-human CYP2E1 antibody. An in vivo hepatoprotective activity assay was performed at 1000 to 4000 μg/mL concentrations on CCl4-induced acute toxicity in rats, and the serum levels of glutamic oxaloacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), alkaline phosphatase (ALP) and lactate dehydrogenase (LDH) were determined by standard enzyme assays. Results The hepatoprotective effects of HCIF significantly reduced the levels of GOT (60.1%, P = 0.000) and GPT (64.5%, P = 0.000) compared with the vehicle control group (CCl4 alone). The survival rates of HepG2 and Chang cells were significantly improved compared with the control group [82.1% (P = 0.034) and 62.3% (P = 0.002), respectively]. HCIF [50 mg/kg body weight (BW)] treatment significantly reduced the serum levels of GOT (49.5%, P = 0.00), GPT (55.5%, P = 0.00), ALP (30.8%, P = 0.000) and LDH (45.6%, P = 0.000) compared with the control group in this in vivo study. The expression level of cytochrome P450 2E1 (CYP2E1) protein was also significantly decreased at the same concentration (50 mg/kg BW; P = 0.018). Conclusion HCIF inhibited bioactivation of CCl4-induced hepatotoxicity and downregulates CYP2E1 expression in vitro and in vivo.
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Affiliation(s)
- Sang Chul Jeong
- Department of Biotechnology, Daegu University, Gyeongsan, Gyeoongbuk 712-714, Republic of Korea.
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Study of the potential oxidative stress induced by six solvents in the rat brain. Neurotoxicology 2012; 35:71-83. [PMID: 23270871 DOI: 10.1016/j.neuro.2012.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 12/10/2012] [Accepted: 12/11/2012] [Indexed: 02/03/2023]
Abstract
The mechanisms of action involved in the neurotoxicity of solvents are poorly understood. In vitro studies have suggested that the effects of some solvents might be due to the formation of reactive oxygen species (ROS). This study assesses hydroxyl radical (OH) generation and measures malondialdehyde (MDA) levels in the cerebral tissue of rats exposed to six solvents (n-hexane, n-octane, toluene, n-butylbenzene, cyclohexane and 1,2,4-trimethylcyclohexane). Three of these solvents have been shown to generate ROS in studies carried out in vitro on granular cell cultures from rat cerebellum. We assessed OH production by quantifying the rate of formation of 3,4-dihydroxybenzoic acid using a trapping agent, 4-hydroxybenzoic acid, infused via the microdialysis probe, into the prefrontal cortex of rats exposed intraperitoneally to the solvents. Extracellular MDA was quantified in microdialysates collected from the prefrontal cortex of rats exposed, 6h/day for ten days, to 1000ppm of the solvents (except for n-butylbenzene, generated at 830ppm) in inhalation chambers. Tissue levels of free and total MDA were measured in different brain structures for rats acutely (intraperitoneal route) and sub-acutely (inhalation) exposed to solvents. None of the six solvents studied increased the production of hydroxyl radicals in the prefrontal cortex after acute administration. Nor did they increase extracellular or tissue levels of MDA after 10 days' inhalation exposure. On the other hand, a decrease in the concentrations of free MDA in brain structures was observed after acute administration of n-hexane, 1,2,4-trimethylcyclohexane, toluene and n-butylbenzene. Therefore, data of this study carried out in vivo did not confirm observations made in vitro on cell cultures.
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Zeybel M, Hardy T, Wong YK, Mathers JC, Fox CR, Gackowska A, Oakley F, Burt AD, Wilson CL, Anstee QM, Barter MJ, Masson S, Elsharkawy AM, Mann DA, Mann J. Multigenerational epigenetic adaptation of the hepatic wound-healing response. Nat Med 2012; 18:1369-77. [PMID: 22941276 PMCID: PMC3489975 DOI: 10.1038/nm.2893] [Citation(s) in RCA: 202] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 07/02/2012] [Indexed: 02/06/2023]
Abstract
We asked if ancestral liver damage leads to heritable reprogramming of hepatic wound-healing. We discovered that male rats with a history of liver damage transmit epigenetic suppressive adaptation of the fibrogenic component of wound-healing through male F1 and F2 generations. Underlying this adaptation was reduced generation of liver myofibroblasts, increased hepatic expression of antifibrogenic PPAR-γ and decreased expression of profibrogenic TGF-β1. Remodelling of DNA methylation and histone acetylation underpinned these alterations in gene expression. Sperm from rats with liver fibrosis were enriched for H2A.Z and H3K27me3 at PPAR-γ chromatin. These sperm chromatin modifications were transmittable by adaptive serum transfer from fibrotic rats and were induced in stem cells exposed to myofibroblast-conditioned media. A myofibroblast secreted soluble factor therefore stimulates heritable epigenetic signatures to sperm so as to adapt fibrogenesis in offspring. Humans with mild liver fibrosis display PPAR-γ promoter hypomethylation compared with severe fibrotics, thus lending support for epigenetic regulation of fibrosis.
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Affiliation(s)
- Müjdat Zeybel
- Institute of Cellular Medicine, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
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49
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Cronin MT. Quantitative structure-Activity relationship (QSAR) analysis of the acute sublethal neurotoxicity of solvents. Toxicol In Vitro 2012; 10:103-10. [PMID: 20650188 DOI: 10.1016/0887-2333(95)00109-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/1995] [Indexed: 11/19/2022]
Abstract
Acute, sublethal neurotoxicity data for the neurotropic effects of some common solvents were subjected to quantitative structure-activity relationship (QSAR) analysis. Hydrophobicity was found to be important in modelling neurotoxicity; however, highly significant QSARs from regression analysis were not obtained, which may imply that metabolic activity and differing mechanisms of action play an important role in neurotoxicity. It is proposed that hydrophobicity could be used to predict a 'minimal' neurotoxic effect level, above which there will be a neurotoxic effect. Principal component analysis was applied to separate chemicals with high neurotoxicity (EC(30) less than 50 micromoles/litre) from those with low neurotoxicity. This was successful when parameters describing hydrophobicity, molecular volume and size, melting and boiling point were included and provides a potential method to predict whether a compound is highly neurotoxic. This suggests that in addition to partitioning through a membrane, aqueous solubility and volatility are also important factors governing neurotoxicity.
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Affiliation(s)
- M T Cronin
- School of Pharmacy and Chemistry, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
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50
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Wu D, Wang X, Zhou R, Yang L, Cederbaum AI. Alcohol steatosis and cytotoxicity: the role of cytochrome P4502E1 and autophagy. Free Radic Biol Med 2012; 53:1346-57. [PMID: 22819980 PMCID: PMC3436962 DOI: 10.1016/j.freeradbiomed.2012.07.005] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 07/06/2012] [Accepted: 07/06/2012] [Indexed: 02/07/2023]
Abstract
The goal of the current study was to evaluate whether CYP2E1 plays a role in binge-ethanol induced steatosis and if autophagy impacts CYP2E1-mediated hepatotoxicity, oxidative stress and fatty liver formation produced by ethanol. Wild type (WT), CYP2E1 knockin (KI) and CYP2E1 knockout (KO) mice were gavaged with 3g/kg body wt ethanol twice a day for four days. This treatment caused fatty liver, elevation of CYP2E1 and oxidative stress in WT and KI mice but not KO mice. Autophagy was impaired in ethanol-treated KI mice compared to KO mice as reflected by a decline in the LC3-II/LC3-I ratio and lower total LC-3 and Beclin-1 levels coupled to increases in P62, pAKT/AKT and mTOR. Inhibition of macroautophagy by administration of 3-methyladenine enhanced the binge ethanol hepatotoxicity, steatosis and oxidant stress in CYP2E1 KI, but not CYP2E1 KO mice. Stimulation of autophagy by rapamycin blunted the elevated steatosis produced by binge ethanol. Treatment of HepG2 E47 cells which express CYP2E1 with 100mM ethanol for 8 days increased fat accumulation and oxidant stress but decreased autophagy. Ethanol had no effect on these reactions in HepG2 C34 cells which do not express CYP2E1. Inhibition of autophagy elevated ethanol toxicity, lipid accumulation and oxidant stress in the E47, but not C34 cells. The antioxidant N-acetylcysteine, and CYP2E1 inhibitor chlormethiazole blunted these effects of ethanol. These results indicate that CYP2E1 plays an important role in binge ethanol-induced fatty liver. We propose that CYP2E1-derived reactive oxygen species inhibit autophagy, which subsequently causes accumulation of lipid droplets. Inhibition of autophagy promotes binge ethanol induced hepatotoxicity, steatosis and oxidant stress via CYP2E1.
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Affiliation(s)
- Defeng Wu
- Department of Pharmacology & Systems Therapeutics, Mount Sinai School of Medicine, New York, NY 10029
| | - Xiaodong Wang
- Department of Pharmacology & Systems Therapeutics, Mount Sinai School of Medicine, New York, NY 10029
| | - Richard Zhou
- Department of Pharmacology & Systems Therapeutics, Mount Sinai School of Medicine, New York, NY 10029
| | - Lili Yang
- Department of Pharmacology & Systems Therapeutics, Mount Sinai School of Medicine, New York, NY 10029
| | - Arthur I. Cederbaum
- Department of Pharmacology & Systems Therapeutics, Mount Sinai School of Medicine, New York, NY 10029
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