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Ashino T, Nakamura Y, Ohtaki H, Iwakura Y, Numazawa S. Downregulation of the gene expression of Cyp2c29 and Cyp3a11 by cecal ligation and puncture-induced sepsis is associated with interleukin-6. Int Immunopharmacol 2023; 117:110039. [PMID: 36944277 DOI: 10.1016/j.intimp.2023.110039] [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: 01/29/2023] [Revised: 03/07/2023] [Accepted: 03/12/2023] [Indexed: 03/22/2023]
Abstract
Sepsis is a pathological condition that affects the metabolism of administered drugs, leading to changes in the duration and intensity of their intended efficacies. Proinflammatory cytokines downregulate the expression of cytochrome P450s (P450s). The effects of P450 expression under inflammatory conditions have been studied using prophlogistic substances such as lipopolysaccharide; however, few studies have focused on clinical models of sepsis. Here, we show that cecal ligation and puncture (CLP), an approach for the study of human polymicrobial sepsis, leads to the expression of interleukin-1β (IL-1β), IL-6, and tumor necrosis factor α (TNFα) at 24 h after the CLP operation. Following CLP, IL-6-/- mice exhibited markedly lower survival than WT mice. In addition, CLP led to the significant downregulation of Cyp2c29 and Cyp3a11 gene expression in IL-1α-/-/β-/- (IL-1-/-) and TNFα-/- mice as well as in WT mice. In contrast, CLP elicited no significant effect on Cyp3a11 expression in IL-6-/- mice. Although CLP reduced the Cyp2c29 expression level in IL-6-/- mice, the expression of Cyp2c29 was lower in CLP-operated WT mice than in CLP-operated IL-6-/- mice. The reduction in the respective P450 protein levels and activities due to CLP-induced sepsis, reflected in the mRNA expression levels, was abolished by IL-6 depletion. Thus, CLP-induced sepsis downregulates P450 gene expression, particularly Cyp2c expression, and this effect is associated with IL-6 without affecting resistance to CLP-induced sepsis. These findings demonstrate the usefulness of CLP for studying the regulation of P450s and highlight IL-6 as a potential indicator of drug-metabolizing capacity under septic conditions.
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Affiliation(s)
- Takashi Ashino
- Division of Toxicology, Department of Pharmacology, Toxicology and Therapeutics, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa, Tokyo 142-8555, Japan; Pharmacological Research Center, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo 142-8555, Japan.
| | - Yuki Nakamura
- Division of Toxicology, Department of Pharmacology, Toxicology and Therapeutics, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa, Tokyo 142-8555, Japan; Center for Pharmaceutical Education, Faculty of Pharmacy, Yokohama University of Pharmacy, 601 Matano, Totsuka, Yokohama, Kanagawa 245-0066, Japan
| | - Hirokazu Ohtaki
- Department of Functional Neurobiology, School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Yoichiro Iwakura
- Center for Animal Disease Models, Research Institute for Biomedical Sciences, Tokyo University of Science, 2669 Yamazaki, Noda, Chiba 278-0022, Japan
| | - Satoshi Numazawa
- Division of Toxicology, Department of Pharmacology, Toxicology and Therapeutics, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa, Tokyo 142-8555, Japan; Pharmacological Research Center, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo 142-8555, Japan
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Dobrzyński M, Madej JP, Leśków A, Tarnowska M, Majda J, Szopa M, Gamian A, Kuropka P. The Improvement of the Adaptation Process of Tocopherol and Acetylsalicylic Acid in Offspring of Mothers Exposed to TCDD. Animals (Basel) 2021; 11:ani11123430. [PMID: 34944207 PMCID: PMC8698147 DOI: 10.3390/ani11123430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 11/26/2021] [Accepted: 11/28/2021] [Indexed: 12/27/2022] Open
Abstract
Simple Summary Dioxins are proinflammatory factors that may be transferred to offspring through the placenta during pregnancy. α-tocopherol and acetylsalicylic acid are popular agents that limit the spread of inflammation. A histopathological and biochemical analysis was performed to reveal possible changes in liver and blood plasma in response to dioxins, α-tocopherol, and acetylsalicylic acid. The conducted research demonstrated the presence of negative effects on the liver morphology and blood plasma proteins of offspring, due to dioxins that were derived from the mother. However, the use of both drugs can significantly reduce the negative effects on offspring whose mothers have been treated with dioxins. Abstract Dioxins are chemical compounds that may cause an inflammatory reaction. During dioxin-induced inflammation, generated reactive oxygen species lead to morphological changes in various tissues and in biochemical parameters. The aim of this study was to demonstrate the changes in the livers of rats whose mothers were exposed to dioxins and the protective role of α-tocopherol and acetylsalicylic acid in liver inflammation. The study material consisted of Buffalo rats who were the offspring of females treated with dioxin, dioxin + α-tocopherol, or dioxin + acetylsalicylic acid. Livers and blood samples were taken from the rats’ offspring, and then histopathological and biochemical analyses were performed. The histopathological analysis showed that the changes observed in the livers of neonates were the result of the dioxins derived from their mother. The biochemical analysis showed that the morphological changes in the liver affected its function, which manifested in a higher total protein concentration in the dioxin-treated group, and that the creatinine level in this group was significantly higher than that in the other groups. This effect was reduced by the protective role of α-tocopherol and acetylsalicylic acid. Based on these results, we came to the conclusion that dioxins significantly affect the structure of the liver, which negatively affects its function, mainly in the scope of the metabolism of plasma proteins and hepatic enzymes.
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Affiliation(s)
- Maciej Dobrzyński
- Department of Pediatric Dentistry and Preclinical Dentistry, Faculty of Dentistry, Wroclaw Medical University, Krakowska 26, 50-425 Wroclaw, Poland
- Correspondence: (M.D.); (A.L.)
| | - Jan P. Madej
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Norwida 25, 50-375 Wroclaw, Poland; (J.P.M.); (P.K.)
| | - Anna Leśków
- Department of Basic Sciences, Faculty of Health Sciences, Wroclaw Medical University, Grunwaldzka 2, 50-368 Wroclaw, Poland;
- Correspondence: (M.D.); (A.L.)
| | - Małgorzata Tarnowska
- Department of Basic Sciences, Faculty of Health Sciences, Wroclaw Medical University, Grunwaldzka 2, 50-368 Wroclaw, Poland;
| | - Jacek Majda
- Department of Laboratory Diagnostics, 4th Military Hospital, Weigla 5, 50-981 Wroclaw, Poland;
| | - Monika Szopa
- Military Center for Preventive Medicine, Slezna 158, 50-984 Wroclaw, Poland;
| | - Andrzej Gamian
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114 Wroclaw, Poland;
| | - Piotr Kuropka
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Norwida 25, 50-375 Wroclaw, Poland; (J.P.M.); (P.K.)
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Bárcena B, Salamanca A, Pintado C, Mazuecos L, Villar M, Moltó E, Bonzón-Kulichenko E, Vázquez J, Andrés A, Gallardo N. Aging Induces Hepatic Oxidative Stress and Nuclear Proteomic Remodeling in Liver from Wistar Rats. Antioxidants (Basel) 2021; 10:antiox10101535. [PMID: 34679670 PMCID: PMC8533122 DOI: 10.3390/antiox10101535] [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: 07/31/2021] [Revised: 09/23/2021] [Accepted: 09/24/2021] [Indexed: 12/13/2022] Open
Abstract
Aging is a continuous, universal, and irreversible process that determines progressive loss of adaptability. The liver is a critical organ that supports digestion, metabolism, immunity, detoxification, vitamin storage, and hormone signaling. Nevertheless, the relationship between aging and the development of liver diseases remains elusive. In fact, although prolonged fasting in adult rodents and humans delays the onset of the disease and increases longevity, whether prolonged fasting could exert adverse effects in old organisms remains incompletely understood. In this work, we aimed to characterize the oxidative stress and nuclear proteome in the liver of 3-month- and 24-month-old male Wistar rats upon 36 h of fasting and its adaptation in response to 30 min of refeeding. To this end, we analyzed the hepatic lipid peroxidation levels (TBARS) and the expression levels of genes associated with fat metabolism and oxidative stress during aging. In addition, to gain a better insight into the molecular and cellular processes that characterize the liver of old rats, the hepatic nuclear proteome was also evaluated by isobaric tag quantitation (iTRAQ) mass spectrometry-based proteomics. In old rats, aging combined with prolonged fasting had great impact on lipid peroxidation in the liver that was associated with a marked downregulation of antioxidant genes (Sod2, Fmo3, and Cyp2C11) compared to young rats. Besides, our proteomic study revealed that RNA splicing is the hepatic nuclear biological process markedly affected by aging and this modification persists upon refeeding. Our results suggest that aged-induced changes in the nuclear proteome could affect processes associated with the adaptative response to refeeding after prolonged fasting, such as those involved in the defense against oxidative stress.
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Affiliation(s)
- Brenda Bárcena
- Biochemistry Section, Regional Center for Biomedical Research (CRIB), Faculty of Sciences and Chemical Technologies, University of Castilla-La Mancha, Avda. Camilo Jose Cela 10, 13071 Ciudad Real, Spain; (B.B.); (A.S.); (L.M.); (A.A.)
| | - Aurora Salamanca
- Biochemistry Section, Regional Center for Biomedical Research (CRIB), Faculty of Sciences and Chemical Technologies, University of Castilla-La Mancha, Avda. Camilo Jose Cela 10, 13071 Ciudad Real, Spain; (B.B.); (A.S.); (L.M.); (A.A.)
| | - Cristina Pintado
- Biochemistry Section, Regional Center for Biomedical Research (CRIB), Faculty of Environmental Sciences and Biochemistry, University of Castilla-La Mancha, Avda. Carlos III s/n, 45071 Toledo, Spain; (C.P.); (E.M.)
| | - Lorena Mazuecos
- Biochemistry Section, Regional Center for Biomedical Research (CRIB), Faculty of Sciences and Chemical Technologies, University of Castilla-La Mancha, Avda. Camilo Jose Cela 10, 13071 Ciudad Real, Spain; (B.B.); (A.S.); (L.M.); (A.A.)
| | - Margarita Villar
- Biochemistry Section, Regional Center for Biomedical Research (CRIB), Faculty of Sciences and Chemical Technologies, University of Castilla-La Mancha, Avda. Camilo Jose Cela 10, 13071 Ciudad Real, Spain; (B.B.); (A.S.); (L.M.); (A.A.)
- SaBio, Instituto de Investigación en Recursos Cinegéticos IREC-CSIC-UCLM-JCCM, Ronda de Toledo s/n, 13005 Ciudad Real, Spain
- Correspondence: (M.V.); (N.G.)
| | - Eduardo Moltó
- Biochemistry Section, Regional Center for Biomedical Research (CRIB), Faculty of Environmental Sciences and Biochemistry, University of Castilla-La Mancha, Avda. Carlos III s/n, 45071 Toledo, Spain; (C.P.); (E.M.)
| | - Elena Bonzón-Kulichenko
- Cardiovascular Proteomics Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III and CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (E.B.-K.); (J.V.)
| | - Jesús Vázquez
- Cardiovascular Proteomics Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III and CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (E.B.-K.); (J.V.)
| | - Antonio Andrés
- Biochemistry Section, Regional Center for Biomedical Research (CRIB), Faculty of Sciences and Chemical Technologies, University of Castilla-La Mancha, Avda. Camilo Jose Cela 10, 13071 Ciudad Real, Spain; (B.B.); (A.S.); (L.M.); (A.A.)
| | - Nilda Gallardo
- Biochemistry Section, Regional Center for Biomedical Research (CRIB), Faculty of Sciences and Chemical Technologies, University of Castilla-La Mancha, Avda. Camilo Jose Cela 10, 13071 Ciudad Real, Spain; (B.B.); (A.S.); (L.M.); (A.A.)
- Correspondence: (M.V.); (N.G.)
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Yiming Z, Hang Y, Bing S, Hua X, Bo H, Honggui L, Shu L. Antagonistic effect of VDR/CREB1 pathway on cadmium-induced apoptosis in porcine spleen. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 209:111819. [PMID: 33360786 DOI: 10.1016/j.ecoenv.2020.111819] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) is a toxic trace element that can enter the environment with industrial waste and accumulate in the body but the health effects of Cd on ternary pigs are still lacking in research. In order to explore the effect of Cd on the apoptosis of pig spleen and its mechanism, this study chose ternary pig as the research object to detect relevant indicators in pig spleen under Cd exposure. The results of this study showed that Cd exposure can induce apoptosis by promoting the absorption of various toxic trace elements in the spleen and inducing oxidative stress. We also found that the mechanism of Cd-induced apoptosis is closely related to the VDR/CREB1 pathway. On the one hand, Cd exposure can activate VDR, and indirectly regulate the CYP family, affecting the normal function of the spleen. On the other hand, VDR and its downstream genes antagonize the toxicity of Cd by maintaining the stability of the mitochondrial-related endoplasmic reticulum membrane structure. Our research will help researchers to further understand the physiological toxicity of Cd.
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Affiliation(s)
- Zhang Yiming
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Yin Hang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Shao Bing
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Xue Hua
- Natl Selenium Rich Prod Qual Supervis & Inspect C, Enshi 445000, China
| | - Huang Bo
- Natl Selenium Rich Prod Qual Supervis & Inspect C, Enshi 445000, China
| | - Liu Honggui
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China.
| | - Li Shu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China.
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5
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Avilla MN, Malecki KMC, Hahn ME, Wilson RH, Bradfield CA. The Ah Receptor: Adaptive Metabolism, Ligand Diversity, and the Xenokine Model. Chem Res Toxicol 2020; 33:860-879. [PMID: 32259433 PMCID: PMC7175458 DOI: 10.1021/acs.chemrestox.9b00476] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Indexed: 12/12/2022]
Abstract
The Ah receptor (AHR) has been studied for almost five decades. Yet, we still have many important questions about its role in normal physiology and development. Moreover, we still do not fully understand how this protein mediates the adverse effects of a variety of environmental pollutants, such as the polycyclic aromatic hydrocarbons (PAHs), the chlorinated dibenzo-p-dioxins ("dioxins"), and many polyhalogenated biphenyls. To provide a platform for future research, we provide the historical underpinnings of our current state of knowledge about AHR signal transduction, identify a few areas of needed research, and then develop concepts such as adaptive metabolism, ligand structural diversity, and the importance of proligands in receptor activation. We finish with a discussion of the cognate physiological role of the AHR, our perspective on why this receptor is so highly conserved, and how we might think about its cognate ligands in the future.
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Affiliation(s)
- Mele N. Avilla
- Molecular and Environmental Toxicology
Center, Department of Population Health
Sciences, University of Wisconsin School
of Medicine and Public Health, Madison, Wisconsin 53726-2379, United States
| | - Kristen M. C. Malecki
- Molecular and Environmental Toxicology
Center, Department of Population Health
Sciences, University of Wisconsin School
of Medicine and Public Health, Madison, Wisconsin 53726-2379, United States
| | - Mark E. Hahn
- Biology
Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543-1050, United States
| | - Rachel H. Wilson
- Molecular and Environmental Toxicology
Center, Department of Population Health
Sciences, University of Wisconsin School
of Medicine and Public Health, Madison, Wisconsin 53726-2379, United States
| | - Christopher A. Bradfield
- Molecular and Environmental Toxicology
Center, Department of Population Health
Sciences, University of Wisconsin School
of Medicine and Public Health, Madison, Wisconsin 53726-2379, United States
- McArdle
Laboratory for Cancer Research, University of Wisconsin School of Medicine
and Public Health, Madison, Wisconsin 53705-227, United States
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6
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MacDonald JA, Bothun AM, Annis SN, Sheehan H, Ray S, Gao Y, Ivanov AR, Khrapko K, Tilly JL, Woods DC. A nanoscale, multi-parametric flow cytometry-based platform to study mitochondrial heterogeneity and mitochondrial DNA dynamics. Commun Biol 2019; 2:258. [PMID: 31312727 PMCID: PMC6624292 DOI: 10.1038/s42003-019-0513-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 06/18/2019] [Indexed: 12/27/2022] Open
Abstract
Mitochondria are well-characterized regarding their function in both energy production and regulation of cell death; however, the heterogeneity that exists within mitochondrial populations is poorly understood. Typically analyzed as pooled samples comprised of millions of individual mitochondria, there is little information regarding potentially different functionality across subpopulations of mitochondria. Herein we present a new methodology to analyze mitochondria as individual components of a complex and heterogeneous network, using a nanoscale and multi-parametric flow cytometry-based platform. We validate the platform using multiple downstream assays, including electron microscopy, ATP generation, quantitative mass-spectrometry proteomic profiling, and mtDNA analysis at the level of single organelles. These strategies allow robust analysis and isolation of mitochondrial subpopulations to more broadly elucidate the underlying complexities of mitochondria as these organelles function collectively within a cell.
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Affiliation(s)
- Julie A. MacDonald
- Department of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115 USA
| | - Alisha M. Bothun
- Department of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115 USA
| | - Sofia N. Annis
- Department of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115 USA
| | - Hannah Sheehan
- Department of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115 USA
| | - Somak Ray
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115 USA
- Barnett Institute for Chemical and Biological Analysis, Northeastern University, Boston, MA 02115 USA
| | - Yuanwei Gao
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115 USA
- Barnett Institute for Chemical and Biological Analysis, Northeastern University, Boston, MA 02115 USA
| | - Alexander R. Ivanov
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115 USA
- Barnett Institute for Chemical and Biological Analysis, Northeastern University, Boston, MA 02115 USA
| | - Konstantin Khrapko
- Department of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115 USA
| | - Jonathan L. Tilly
- Department of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115 USA
| | - Dori C. Woods
- Department of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115 USA
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Bhargava A, Tamrakar S, Aglawe A, Lad H, Srivastava RK, Mishra DK, Tiwari R, Chaudhury K, Goryacheva IY, Mishra PK. Ultrafine particulate matter impairs mitochondrial redox homeostasis and activates phosphatidylinositol 3-kinase mediated DNA damage responses in lymphocytes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 234:406-419. [PMID: 29202419 DOI: 10.1016/j.envpol.2017.11.093] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/27/2017] [Accepted: 11/27/2017] [Indexed: 05/28/2023]
Abstract
Particulate matter (PM), broadly defined as coarse (2.5-10 μm), fine (0.1-2.5 μm) and ultrafine particles (≤0.1 μm), is a major constituent of ambient air pollution. Recent studies have linked PM exposure (coarse and fine particles) with several human diseases including cancer. However, the molecular mechanisms underlying ultrafine PM exposure induced cellular and sub-cellular repercussions are ill-defined. Since mitochondria are one of the major targets of different environmental pollutants, we herein aimed to understand the molecular repercussion of ultrafine PM exposure on mitochondrial machinery in peripheral blood lymphocytes. Upon comparative analysis, a significantly higher DCF fluorescence was observed in ultrafine PM exposed cells that confirmed the strong pro-oxidant nature of these particles. In addition, the depleted activity of antioxidant enzymes, glutathione reductase and superoxide dismutase suggested the strong association of ultrafine PM with oxidative stress. These results further coincided with mitochondrial membrane depolarization, altered mitochondrial respiratory chain enzyme activity and decline in mtDNA copy number. Moreover, the higher accumulation of DNA damage response proteins (γH2AX, pATM, p-p53), suggested that exposure to ultrafine PM induces DNA damage and triggers phosphatidylinositol 3 kinase mediated response pathway. Further, the alterations in mitochondrial machinery and redox balance among ultrafine PM exposed cells were accompanied by a considerably elevated pro-inflammatory cytokine response. Interestingly, the lower apoptosis levels observed in ultrafine particle treated cells suggest the possibility that the marked alterations may lead to the impairment of mitochondrial-nuclear cross talk. Together, our results showed that ultrafine PM, because of their smaller size possesses significant ability to disturb mitochondrial redox homeostasis and activates phosphatidylinositol 3 kinase mediated DNA damage response pathway, an unknown molecular paradigm of ultrafine PM exposure. Our findings also indicate that maneuvering through the mitochondrial function might be a viable, indirect method to modulate lymphocyte homeostasis in air pollution associated immune disorders.
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Affiliation(s)
- Arpit Bhargava
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Shivani Tamrakar
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Aniket Aglawe
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Harsha Lad
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | | | - Dinesh Kumar Mishra
- School of Pharmacy and Technology Management, Narsee Moonjee Institute of Management Studies, Shirpur, India
| | - Rajnarayan Tiwari
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Koel Chaudhury
- School of Medical Science & Technology, Indian Institute of Technology, Kharagpur, India
| | - Irina Yu Goryacheva
- Department of General and Inorganic Chemistry, Saratov State University, Saratov, Russia
| | - Pradyumna Kumar Mishra
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India.
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Kumari K, Pathakota GB, Kumar S, Krishna G. Gene structure and comparative and phylogenetic analyses of Catla catla CYP1A full-length cDNA and its responsiveness to benzo(a)pyrene and copper sulphate at early developmental stages. FISH PHYSIOLOGY AND BIOCHEMISTRY 2018; 44:95-108. [PMID: 28822029 DOI: 10.1007/s10695-017-0416-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 08/07/2017] [Indexed: 06/07/2023]
Abstract
In the present study, full-length CYP1A cDNA from Catla catla (Catla) has been identified, and its real-time quantitative reverse transcription PCR (qRT-PCR) expression has been evaluated in different tissues, developmental stages (0, 3, 6, 12 and 24 h and 5, 7 and 9 days post-fertilization) and copper sulphate and benzo(a)pyrene (BaP)-treated 5-day post-fertilization (dpf) larvae (6 to 6.5 mm). Various structural, comparative and phylogenetic analyses of the deduced amino acid sequence revealed that the identified gene of Catla belongs to the CYP1A1 subfamily. Among different tissues of Catla, the highest CYP1A expression was observed in the kidney followed by the liver, muscle, gill, intestine and brain. CYP1A mRNA expression was detected during all the larval developmental stages, including the unfertilized egg with the highest expression on 9 dpf. BaP (3.5 ppb) and copper sulphate (sublethal dose 0.516 ppm) challenge test for 96 h to Catla larvae revealed the highest CYP1A1 expression at 48 h post-challenge. CYP1A1 transcript also showed a concentration-dependent increase in expression following exposure at 1.75 and 3.5 ppb of BaP for 48 h. Its expression profiling indicates that it is functional at early developmental stages. It can also be used to develop a specific biomarker tool for monitoring environmental pollution.
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Affiliation(s)
- Kavita Kumari
- Central Inland Fisheries Research Institute, Barrackpore, 700120, India
- Central Institute of Fisheries Education, Versova, Mumbai, 400061, India
| | | | - Shivendra Kumar
- Dr. Rajendra Prasad Central Agricultural University, Pusa 848125, Samastipur, Bihar, India.
| | - Gopal Krishna
- Central Institute of Fisheries Education, Versova, Mumbai, 400061, India
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9
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Lu Y, Cederbaum AI. Cytochrome P450s and Alcoholic Liver Disease. Curr Pharm Des 2018; 24:1502-1517. [PMID: 29637855 PMCID: PMC6053342 DOI: 10.2174/1381612824666180410091511] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 03/30/2018] [Accepted: 04/06/2018] [Indexed: 12/19/2022]
Abstract
Alcohol consumption causes liver diseases, designated as Alcoholic Liver Disease (ALD). Because alcohol is detoxified by alcohol dehydrogenase (ADH), a major ethanol metabolism system, the development of ALD was initially believed to be due to malnutrition caused by alcohol metabolism in liver. The discovery of the microsomal ethanol oxidizing system (MEOS) changed this dogma. Cytochrome P450 enzymes (CYP) constitute the major components of MEOS. Cytochrome P450 2E1 (CYP2E1) in MEOS is one of the major ROS generators in liver and is considered to be contributive to ALD. Our labs have been studying the relationship between CYP2E1 and ALD for many years. Recently, we found that human CYP2A6 and its mouse analog CYP2A5 are also induced by alcohol. In mice, the alcohol induction of CYP2A5 is CYP2E1-dependent. Unlike CYP2E1, CYP2A5 protects against the development of ALD. The relationship of CYP2E1, CYP2A5, and ALD is a major focus of this review.
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Affiliation(s)
- Yongke Lu
- Department of Health Sciences, College of Public Health, East Tennessee State University
- Center of Excellence for Inflammation, Infectious Disease and Immunity, East Tennessee State University
| | - Arthur I. Cederbaum
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai
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10
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Chen Y, Meyer JN, Hill HZ, Lange G, Condon MR, Klein JC, Ndirangu D, Falvo MJ. Role of mitochondrial DNA damage and dysfunction in veterans with Gulf War Illness. PLoS One 2017; 12:e0184832. [PMID: 28910366 PMCID: PMC5599026 DOI: 10.1371/journal.pone.0184832] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 08/31/2017] [Indexed: 11/22/2022] Open
Abstract
Gulf War Illness (GWI) is a chronic multi-symptom illness not currently diagnosed by standard medical or laboratory test that affects 30% of veterans who served during the 1990-1991 Gulf War. The clinical presentation of GWI is comparable to that of patients with certain mitochondrial disorders-i.e., clinically heterogeneous multisystem symptoms. Therefore, we hypothesized that mitochondrial dysfunction may contribute to both the symptoms of GWI as well as its persistence over time. We recruited 21 cases of GWI (CDC and Kansas criteria) and 7 controls to participate in this study. Peripheral blood samples were obtained in all participants and a quantitative polymerase chain reaction (QPCR) based assay was performed to quantify mitochondrial and nuclear DNA lesion frequency and mitochondrial DNA (mtDNA) copy number (mtDNAcn) from peripheral blood mononuclear cells. Samples were also used to analyze nuclear DNA lesion frequency and enzyme activity for mitochondrial complexes I and IV. Both mtDNA lesion frequency (p = 0.015, d = 1.13) and mtDNAcn (p = 0.001; d = 1.69) were elevated in veterans with GWI relative to controls. Nuclear DNA lesion frequency was also elevated in veterans with GWI (p = 0.344; d = 1.41), but did not reach statistical significance. Complex I and IV activity (p > 0.05) were similar between groups and greater mtDNA lesion frequency was associated with reduced complex I (r2 = -0.35, p = 0.007) and IV (r2 = -0.28, p < 0.01) enzyme activity. In conclusion, veterans with GWI exhibit greater mtDNA damage which is consistent with mitochondrial dysfunction.
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Affiliation(s)
- Yang Chen
- War Related Illness and Injury Study Center, Veterans Affairs New Jersey Health Care System, East Orange, New Jersey, United States of America
- New Jersey Medical School, Rutgers Biomedical and Health Sciences, Newark, New Jersey, United States of America
| | - Joel N Meyer
- Nicholas School of the Environment, Duke University, Durham, North Carolina, United States of America
| | - Helene Z Hill
- New Jersey Medical School, Rutgers Biomedical and Health Sciences, Newark, New Jersey, United States of America
| | - Gudrun Lange
- Pain and Fatigue Study Center, Beth Israel Medical Center and Albert Einstein Medical Center, New York, New York, United States of America
| | - Michael R Condon
- New Jersey Medical School, Rutgers Biomedical and Health Sciences, Newark, New Jersey, United States of America
- Surgical Services, Veterans Affairs New Jersey Health Care System, East Orange, New Jersey, United States of America
| | - Jacquelyn C Klein
- War Related Illness and Injury Study Center, Veterans Affairs New Jersey Health Care System, East Orange, New Jersey, United States of America
| | - Duncan Ndirangu
- War Related Illness and Injury Study Center, Veterans Affairs New Jersey Health Care System, East Orange, New Jersey, United States of America
| | - Michael J Falvo
- War Related Illness and Injury Study Center, Veterans Affairs New Jersey Health Care System, East Orange, New Jersey, United States of America
- New Jersey Medical School, Rutgers Biomedical and Health Sciences, Newark, New Jersey, United States of America
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11
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Reed JR, Backes WL. The functional effects of physical interactions involving cytochromes P450: putative mechanisms of action and the extent of these effects in biological membranes. Drug Metab Rev 2017; 48:453-69. [PMID: 27500687 DOI: 10.1080/03602532.2016.1221961] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cytochromes P450 represent a family of enzymes, which are responsible for the oxidative metabolism of a wide variety of xenobiotics. Although the mammalian P450s require interactions with their redox partners in order to function, more recently, P450 system proteins have been shown to exist as multi-protein complexes that include the formation of P450•P450 complexes. Evidence has shown that the metabolism of some substrates by a given P450 can be influenced by the specific interaction of the enzyme with other forms of P450. Detailed kinetic analysis of these reactions in vitro has shown that the P450-P450 interactions can alter metabolism by changing the ability of a P450 to bind to its cognate redox partner, NADPH-cytochrome P450 reductase; by altering substrate binding to the affected P450; and/or by changing the rate of a catalytic step of the reaction cycle. This review summarizes the known examples of P450-P450 interactions that have been shown in vitro to influence metabolism and categorizes them according to the mechanism(s) causing the effects. P450-P450 interactions have the potential to cause major changes in the metabolism and elimination of drugs in vivo. This review summarizes the evidence that the P450-P450 interactions influence metabolism in biological membranes and discusses the studies, which will provide further insight into the extent of these effects in the future.
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Affiliation(s)
- James R Reed
- a Department of Pharmacology and Experimental Therapeutics, and The Stanley S. Scott Cancer Center , Louisiana State University Health Sciences Center , New Orleans , LA , USA
| | - Wayne L Backes
- a Department of Pharmacology and Experimental Therapeutics, and The Stanley S. Scott Cancer Center , Louisiana State University Health Sciences Center , New Orleans , LA , USA
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12
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Clinical effects of chemical exposures on mitochondrial function. Toxicology 2017; 391:90-99. [PMID: 28757096 DOI: 10.1016/j.tox.2017.07.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/07/2017] [Accepted: 07/17/2017] [Indexed: 12/16/2022]
Abstract
Mitochondria are critical for the provision of ATP for cellular energy requirements. Tissue and organ functions are dependent on adequate ATP production, especially when energy demand is high. Mitochondria also play a role in a vast array of important biochemical pathways including apoptosis, generation and detoxification of reactive oxygen species, intracellular calcium regulation, steroid hormone and heme synthesis, and lipid metabolism. The complexity of mitochondrial structure and function facilitates its diverse roles but also enhances its vulnerability. Primary disorders of mitochondrial bioenergetics, or Primary Mitochondrial Diseases (PMD) are due to inherited genetic defects in the nuclear or mitochondrial genomes that result in defective oxidative phosphorylation capacity and cellular energy production. Secondary mitochondrial dysfunction is observed in a wide range of diseases such as Alzheimer's and Parkinson's disease. Several lines of evidence suggest that environmental exposures cause substantial mitochondrial dysfunction. Whereby literature from experimental and human studies on exposures associated with Alzheimer's and Parkinson's diseases exist, the significance of exposures as potential triggers in Primary Mitochondrial Disease (PMD) is an emerging clinical question that has not been systematically studied.
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13
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Rainey NE, Saric A, Leberre A, Dewailly E, Slomianny C, Vial G, Zeliger HI, Petit PX. Synergistic cellular effects including mitochondrial destabilization, autophagy and apoptosis following low-level exposure to a mixture of lipophilic persistent organic pollutants. Sci Rep 2017; 7:4728. [PMID: 28680151 PMCID: PMC5498599 DOI: 10.1038/s41598-017-04654-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 05/25/2017] [Indexed: 12/13/2022] Open
Abstract
Humans are exposed to multiple exogenous environmental pollutants. Many of these compounds are parts of mixtures that can exacerbate harmful effects of the individual mixture components. 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), is primarily produced via industrial processes including incineration and the manufacture of herbicides. Both endosulfan and TCDD are persistent organic pollutants which elicit cytotoxic effects by inducing reactive oxygen species generation. Sublethal concentrations of mixtures of TCDD and endosulfan increase oxidative stress, as well as mitochondrial homeostasis disruption, which is preceded by a calcium rise and, in fine, induce cell death. TCDD+Endosulfan elicit a complex signaling sequence involving reticulum endoplasmic destalilization which leads to Ca2+ rise, superoxide anion production, ATP drop and late NADP(H) depletion associated with a mitochondrial induced apoptosis concomitant early autophagic processes. The ROS scavenger, N-acetyl-cysteine, blocks both the mixture-induced autophagy and death. Calcium chelators act similarly and mitochondrially targeted anti-oxidants also abrogate these effects. Inhibition of the autophagic fluxes with 3-methyladenine, increases mixture-induced cell death. These findings show that subchronic doses of pollutants may act synergistically. They also reveal that the onset of autophagy might serve as a protective mechanism against ROS-triggered cytotoxic effects of a cocktail of pollutants in Caco-2 cells and increase their tumorigenicity.
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Affiliation(s)
- Nathan E Rainey
- Laboratoire de Toxicologie, Pharmacologie et Signalisation Cellulaire, INSERM S-1124, Université Paris-Descartes, Centre Universitaire des Saints-Pères, 45 Rue des Saints-Pères, F-75270, Paris, Cedex 06, France
- Laboratory for Vascular Translational Science (LVTS), INSERM U1148, X. Bichat Hospital, Université Paris 13, UFR SMBH Sorbonne Paris Cité, 75018, Paris, France
| | - Ana Saric
- Laboratoire de Toxicologie, Pharmacologie et Signalisation Cellulaire, INSERM S-1124, Université Paris-Descartes, Centre Universitaire des Saints-Pères, 45 Rue des Saints-Pères, F-75270, Paris, Cedex 06, France
- Division of Molecular Medicine, Rudger Boskovic Institute, Zagreb, Croatia
| | - Alexandre Leberre
- Laboratoire de Toxicologie, Pharmacologie et Signalisation Cellulaire, INSERM S-1124, Université Paris-Descartes, Centre Universitaire des Saints-Pères, 45 Rue des Saints-Pères, F-75270, Paris, Cedex 06, France
| | - Etienne Dewailly
- Laboratoire de Physiologie cellulaire, INSERM U800, Université des Sciences et Techniques de Lille 1, F-59655, Villeneuve d'Ascq, Cedex, France
| | - Christian Slomianny
- Laboratoire de Physiologie cellulaire, INSERM U800, Université des Sciences et Techniques de Lille 1, F-59655, Villeneuve d'Ascq, Cedex, France
| | - Guillaume Vial
- Unité 1060 INSERM CarMen/Univ.Lyon1/INRA 1235, INSA, Bât. IMBL, La Doua 11 Avenue Jean Capelle, 69100, Villeurbanne, France
| | - Harold I Zeliger
- Zeliger Chemical, Toxicological and Environmental Research, 41 Wildwood Drive, Cape Elizabeth, Maine, 04107, USA
| | - Patrice X Petit
- Laboratoire de Toxicologie, Pharmacologie et Signalisation Cellulaire, INSERM S-1124, Université Paris-Descartes, Centre Universitaire des Saints-Pères, 45 Rue des Saints-Pères, F-75270, Paris, Cedex 06, France.
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14
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Całkosiński I, Gostomska-Pampuch K, Majda J, Leśków A, Janeczek M, Melnyk OP, Gamian A. The Influence of α-Tocopherol on Serum Biochemical Markers During Experimentally Induced Pleuritis in Rats Exposed to Dioxin. Inflammation 2017; 40:913-926. [PMID: 28299486 PMCID: PMC5429350 DOI: 10.1007/s10753-017-0536-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Toxicity of dioxins is wide ranging. Amongst the organs, the liver is the most susceptible to damage by dioxins. Damage caused to liver cells results in promoting inflammatory processes. The aim of this work was to evaluate whether high doses of tocopherol will change the inflammatory response, monitored by biochemical indicators, by improving liver function in rats exposed to tetrachlorodibenzo-p-dioxin (TCDD). The study was conducted on a population of female Buffalo rats. The animals were divided into the following groups: Control Group A—representing physiological norms for the studied diagnostic indicators; Control Group B—subjects were administered a 1% ceragenin solution to induce pleuritis; Study Group 1—where rats were administered α-tocopherol acetate for 3 weeks, after which pleuritis was induced; Study Group 2—rats were administered a single dose of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), while 3 weeks later, pleuritis was induced; and Study Group 3—rats were administered a single dose of TCDD and next, were administered α-tocopherol acetate for 3 weeks, followed by pleuritis induction. The results clearly show that administering tocopherol in the course of inflammation causes changes to the distribution and ratio of in the serum protein fractions, including acute phase proteins. The latter proteins are indicative to the improvement in liver function and linked to protein synthesis and stimulation of the antibody-mediated immunity. Moreover, in the course of inflammation caused by exposure of rats to TCDD, tocopherol significantly affected the acute phase protein concentration.
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Affiliation(s)
- Ireneusz Całkosiński
- Independent Laboratory of Neurotoxicology and Environmental Diagnostics, Wroclaw Medical University, 51-618, Wroclaw, Poland.
| | - Kinga Gostomska-Pampuch
- Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wroclaw, Poland
| | - Jacek Majda
- Department of Laboratory Diagnostics, 4th Military Hospital, 50-981, Wroclaw, Poland
| | - Anna Leśków
- Independent Laboratory of Neurotoxicology and Environmental Diagnostics, Wroclaw Medical University, 51-618, Wroclaw, Poland
| | - Maciej Janeczek
- Department of Biostructure and Animal Physiology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, 50-375, Wroclaw, Poland
| | - Oleg P Melnyk
- Department of Animal Anatomy, National University of Life and Environmental Sciences of Ukraine, Kiev, Ukraine
| | - Andrzej Gamian
- Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wroclaw, Poland.,Department of Medical Biochemistry, Wroclaw Medical University, 50-368, Wroclaw, Poland
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15
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Omura T, Gotoh O. Evolutionary origin of mitochondrial cytochrome P450. J Biochem 2017; 161:399-407. [DOI: 10.1093/jb/mvx011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Accepted: 01/03/2017] [Indexed: 12/17/2022] Open
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16
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Chidinma NC, Adewale A, Chiaka A. Differential expression of metallothionein-1 and cytochrome p450-2a5 (cyp2a5) in mice in response to lead acetate exposure and industrial effluents in Ibadan, Nigeria. Toxicol Ind Health 2016; 32:1875-1881. [DOI: 10.1177/0748233715594107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Metallothionein-1 ( MT-1), cytochrome P450-2A ( CYP2a) and other genes are involved in the detoxification of xenobiotics such as heavy metals and toxins. Changes in their expression precede overt toxic effects and can serve as a marker for exposure to pollutants. We used a mouse experimental system and quantitative reverse transcription polymerase chain reaction to determine changes in gene expression and the direction of change, in response to exposure to lead acetate (LA) and waste water (WW) from an industrial area in Ibadan. MT-1 and CYP2a5 genes were quickly and highly induced at different exposure periods and concentrations. MT-1 was mostly downregulated by the LA exposure, but upregulated by several folds on exposure to WW. CYP2a5 expression was mostly downregulated with LA exposure. The optimum expression of MT-1 and CYP2a5 genes induced by both LA and WW was at 48 h. We conclude that rapid assays to determine the direction of change in the expression of MT-1 and CYP2a5 could be a fast and reliable method in developing countries for screening humans exposed to pollutants from industrial waste.
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Affiliation(s)
- Ndudi Cyril Chidinma
- Department of Zoology, Ecology and Environmental Biology Unit, University Of Ibadan, Ibadan, Nigeria
| | - Adebayo Adewale
- Department of Zoology, Cell Biology and Genetics Unit, University Of Ibadan, Ibadan, Nigeria
| | - Anumudu Chiaka
- Department of Zoology, Cell Biology and Genetics Unit, University Of Ibadan, Ibadan, Nigeria
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17
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Tanino T, Funakami Y, Nagai N, Kato Y. Cyclosporin A-sensitive cytotoxicity of flurbiprofen non-stereoselectively mediated by cytochrome P450 metabolism in three-dimensional cultured rat hepatocytes. ACTA ACUST UNITED AC 2015; 67:1406-15. [PMID: 26099455 DOI: 10.1111/jphp.12443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 04/19/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVES 2-Arylpropionic acid (profen) drugs are associated with severe hepatotoxicity; however, risk factors are still poorly understood. Acyl-coenzyme A (acyl-CoA) thioesters of profen drugs play a more important role in the covalent binding to rat hepatocyte proteins than the respective acyl-glucuronides. Therefore, we examined whether acyl-glucuronides, acyl-CoA thioesters and oxidative metabolites of profen drugs stereoselectively participated in liver damage. METHODS Cytotoxicity was determined by measuring lactate dehydrogenase (LDH) leakage from three-dimensional cultured rat hepatocytes. KEY FINDINGS LDH leakage was not induced by R-2-phenylpropionic acid and R-ibuprofen greatly forming acyl-CoA thioesters. S-Naproxen metabolized mainly by Uridine 5'-diphosphate (UDP)-glucuronosyl-transferase did not enhance LDH leakage. However, flurbiprofen (FLP) induced LDH leakage. A selective cytochrome P450 (CYP) 2C11 inhibitor suppressed 40-50% of the R-FLP and S-FLP-induced cytotoxicity. Borneol non-stereoselectively accelerated the FLP-induced cytotoxicity. The R-FLP-induced cytotoxicity decreased intracellular adenosine triphosphate (ATP) levels to 50% of untreated hepatocytes. An inhibitor of mitochondrial permeability transition pore, cyclosporin A (Cys A), rescued ATP levels and LDH leakage back to control levels. CONCLUSION The reactive acyl-CoA thioesters and acyl-glucuronides were not associated with liver damage, denying one of the leading hypotheses. CYP metabolism of FLP non-stereoselectively participated in Cys A-sensitive cytotoxicity, suggesting mitochondrial injury.
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Affiliation(s)
- Tadatoshi Tanino
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, Japan
| | | | - Noriaki Nagai
- Faculty of Pharmacy, Kinki University, Higashi-Osaka, Osaka, Japan
| | - Yoshihisa Kato
- Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Sanuki, Kagawa, Japan
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18
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Histopathological, ultrastructural, and immunohistochemical assessment of hippocampus structures of rats exposed to TCDD and high doses of tocopherol and acetylsalicylic acid. BIOMED RESEARCH INTERNATIONAL 2015; 2015:645603. [PMID: 25879034 PMCID: PMC4388018 DOI: 10.1155/2015/645603] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 03/13/2015] [Indexed: 12/21/2022]
Abstract
The effect of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on central nervous system consists of changing expression of estrogen receptors, whereas the result of chronic inflammatory reaction caused by dioxin is occurrence of destructive changes in various organs connected with disturbed metabolism of connective tissue and damage of cells. The aim of the study was to determine the effect of dioxins on function, ultrastructure, and cytological and histological structure of hippocampus, particularly on expression of estrogen receptors in central nervous system as well as to define protective influence of tocopherol (TCP) and acetylsalicylic acid (ASA) on the decrease in activity of proinflammatory effects in central nervous system. It was shown that TCDD contributes to destructive and inflammatory changes along with demyelization of myelin sheaths and atrophy of estrogen receptors in hippocampus. Dioxin contributes to atrophy of estrogen receptors in hippocampus, in which also destructive and inflammatory changes were found along with demyelination of myelin sheaths. Histopathological and ultrastructural image of hippocampus areas in rats, in which both TCP and ASA were used, is characterized by poorly expressed degenerative changes and smaller inflammatory reactivity. Using both TCP and ASA has a protective effect on functions of central nervous system.
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19
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Lavandera J, Ruspini S, Batlle A, Buzaleh AM. Cytochrome P450 expression in mouse brain: specific isoenzymes involved in Phase I metabolizing system of porphyrinogenic agents in both microsomes and mitochondria. Biochem Cell Biol 2015; 93:102-7. [DOI: 10.1139/bcb-2014-0088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Brain cytochrome P450 (CYP) metabolizes a variety of drugs to produce their pharmacological effects within the brain. We have previously observed that porphyrinogenic agents altered CYP levels in brain. The aim of this work was to further study the involvement of mice brain mitochondrial and microsomal Phase I drug metabolizing system when porphyrinogenic agents, such as Enflurane, Isoflurane, allylisopropylacetamide, veronal, ethanol, and Griseofulvin were administered. To this end, CYP2E1, CYP2B1, and CYP3A4 expression were measured. NADPH cytochrome P450 reductase (CPR) expression was also determined. Western Blots were performed in microsomes and mitochondria of whole brain. Some of the drugs studied altered expression mainly in microsomes. Chronic Isoflurane augmented mitochondrial isoform, although this anaesthetic diminished microsomal expression. Ethanol and topical Griseofulvin affected expression in microsomes but not in mitochondria. CYP2E1 mitochondrial activity was induced by acute Enflurane; while the activity of the microsomal protein was enhanced in alcoholised animals. Ethanol also induced CYP2E1 expression in microsomes, although Isoflurane provoked opposite effects in mitochondria and microsomes. Expression of CPR was also induced. Several reports support an emergent role of CYP enzymes in the pathogenesis of neurological disorders, so CYP response in brain could be one of the multiples factors influencing porphyria acute attacks.
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Affiliation(s)
- Jimena Lavandera
- Cátedra de Bromatología y Nutrición, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Silvina Ruspini
- Centro de Investigaciones sobre Porfirinas y Porfirias (CIPYP), CONICET, Hospital de Clínicas José de San Martín, Universidad de Buenos Aires, Av. Córdoba 2351, 1120, Buenos Aires, Argentina
| | - Alcira Batlle
- Centro de Investigaciones sobre Porfirinas y Porfirias (CIPYP), CONICET, Hospital de Clínicas José de San Martín, Universidad de Buenos Aires, Av. Córdoba 2351, 1120, Buenos Aires, Argentina
| | - Ana María Buzaleh
- Centro de Investigaciones sobre Porfirinas y Porfirias (CIPYP), CONICET, Hospital de Clínicas José de San Martín, Universidad de Buenos Aires, Av. Córdoba 2351, 1120, Buenos Aires, Argentina
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
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20
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Muhsain SNF, Lang MA, Abu-Bakar A. Mitochondrial targeting of bilirubin regulatory enzymes: An adaptive response to oxidative stress. Toxicol Appl Pharmacol 2015; 282:77-89. [DOI: 10.1016/j.taap.2014.11.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/15/2014] [Accepted: 11/21/2014] [Indexed: 12/20/2022]
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21
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ORF005L from infectious spleen and kidney necrosis virus is located in the inner mitochondrial membrane and induces apoptosis. Virus Genes 2014; 49:269-77. [DOI: 10.1007/s11262-014-1088-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 05/09/2014] [Indexed: 11/25/2022]
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22
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Longhin E, Holme JA, Gutzkow KB, Arlt VM, Kucab JE, Camatini M, Gualtieri M. Cell cycle alterations induced by urban PM2.5 in bronchial epithelial cells: characterization of the process and possible mechanisms involved. Part Fibre Toxicol 2013; 10:63. [PMID: 24354623 PMCID: PMC3878321 DOI: 10.1186/1743-8977-10-63] [Citation(s) in RCA: 145] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 11/25/2013] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND This study explores and characterizes cell cycle alterations induced by urban PM2.5 in the human epithelial cell line BEAS-2B, and elucidates possible mechanisms involved. METHODS The cells were exposed to a low dose (7.5 μg/cm(2)) of Milan winter PM2.5 for different time points, and the cell cycle progression was analyzed by fluorescent microscopy and flow cytometry. Activation of proteins involved in cell cycle control was investigated by Western blotting and DNA damage by (32)P-postlabelling, immunostaining and comet assay. The formation of reactive oxygen species (ROS) was quantified by flow cytometry. The role of PM organic fraction versus washed PM on the cell cycle alterations was also examined. Finally, the molecular pathways activated were further examined using specific inhibitors. RESULTS Winter PM2.5 induced marked cell cycle alteration already after 3 h of exposure, represented by an increased number of cells (transient arrest) in G2. This effect was associated with an increased phosphorylation of Chk2, while no changes in p53 phosphorylation were observed at this time point. The increase in G2 was followed by a transient arrest in the metaphase/anaphase transition point (10 h), which was associated with the presence of severe mitotic spindle aberrations. The metaphase/anaphase delay was apparently followed by mitotic slippage at 24 h, resulting in an increased number of tetraploid G1 cells and cells with micronuclei (MN), and by apoptosis at 40 h. Winter PM2.5 increased the level of ROS at 2 h and DNA damage (8-oxodG, single- and double stand breaks) was detected after 3 h of exposure. The PM organic fraction caused a similar G2/M arrest and augmented ROS formation, while washed PM had no such effects. DNA adducts were detected after 24 h. Both PM-induced DNA damage and G2 arrest were inhibited by the addition of antioxidants and α-naphthoflavone, suggesting the involvement of ROS and reactive electrophilic metabolites formed via a P450-dependent reaction. CONCLUSIONS Milan winter PM2.5 rapidly induces severe cell cycle alterations, resulting in increased frequency of cells with double nuclei and MN. This effect is related to the metabolic activation of PM2.5 organic chemicals, which cause damages to DNA and spindle apparatus.
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Affiliation(s)
- Eleonora Longhin
- Department of Environmental Sciences, POLARIS Research Centre, University Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Jørn A Holme
- Division of Environmental Medicine, Norwegian Institute of Public Health, P.O. Box 4404, Nydalen N-0403 Oslo, Norway
| | - Kristine B Gutzkow
- Division of Environmental Medicine, Norwegian Institute of Public Health, P.O. Box 4404, Nydalen N-0403 Oslo, Norway
| | - Volker M Arlt
- Analytical and Environmental Sciences Division, MRC-PHE-Centre for Environment and Health, King’s College London, 150 Stamford Street, London, SE1 9NH, UK
| | - Jill E Kucab
- Analytical and Environmental Sciences Division, MRC-PHE-Centre for Environment and Health, King’s College London, 150 Stamford Street, London, SE1 9NH, UK
| | - Marina Camatini
- Department of Environmental Sciences, POLARIS Research Centre, University Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Maurizio Gualtieri
- Department of Environmental Sciences, POLARIS Research Centre, University Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
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23
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Dong H, Shertzer HG, Genter MB, Gonzalez FJ, Vasiliou V, Jefcoate C, Nebert DW. Mitochondrial targeting of mouse NQO1 and CYP1B1 proteins. Biochem Biophys Res Commun 2013; 435:727-32. [PMID: 23692925 DOI: 10.1016/j.bbrc.2013.05.051] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 05/12/2013] [Indexed: 10/26/2022]
Abstract
Four dioxin-inducible enzymes--NAD(P)H: quinone oxidoreductase-1 (NQO1) and three cytochromes P450 (CYP1A1, CYP1A2 & CYP1B1)--are implicated in both detoxication and metabolic activation of various endobiotics and xenobiotics. NQO1 is generally regarded as a cytosolic enzyme; whereas CYP1 proteins are located primarily in endoplasmic reticulum (ER), CYP1A1 and CYP1A2 proteins are also targeted to mitochondria. This lab has generated Cyp1a1(mc/mc) and Cyp1a1(mtt/mtt) knock-in mouse lines in which CYP1A1 protein is targeted exclusively to ER (microsomes) and mitochondria, respectively. Comparing dioxin-treated Cyp1(+/+) wild-type, Cyp1a1(mc/mc), Cyp1a1(mtt/mtt), and Cyp1a1(-/-), Cyp1b1(-/-) and Nqo1(-/-) knockout mice, in the present study we show that [a] NQO1 protein locates to cytosol, ER and mitochondria, [b] CYP1B1 protein (similar to CYP1A1 and CYP1A2 proteins) traffics to mitochondria as well as ER, and [c] NQO1 and CYP1B1 targeting to mitochondrial or ER membranes is independent of CYP1A1 presence in that membrane.
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Affiliation(s)
- Hongbin Dong
- Department of Environmental Health and Center for Environmental Genetics, University Cincinnati Medical Center, Cincinnati, OH 45267-0056, USA
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Meyer JN, Leung MCK, Rooney JP, Sendoel A, Hengartner MO, Kisby GE, Bess AS. Mitochondria as a target of environmental toxicants. Toxicol Sci 2013; 134:1-17. [PMID: 23629515 PMCID: PMC3693132 DOI: 10.1093/toxsci/kft102] [Citation(s) in RCA: 350] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Enormous strides have recently been made in our understanding of the biology and pathobiology of mitochondria. Many diseases have been identified as caused by mitochondrial dysfunction, and many pharmaceuticals have been identified as previously unrecognized mitochondrial toxicants. A much smaller but growing literature indicates that mitochondria are also targeted by environmental pollutants. We briefly review the importance of mitochondrial function and maintenance for health based on the genetics of mitochondrial diseases and the toxicities resulting from pharmaceutical exposure. We then discuss how the principles of mitochondrial vulnerability illustrated by those fields might apply to environmental contaminants, with particular attention to factors that may modulate vulnerability including genetic differences, epigenetic interactions, tissue characteristics, and developmental stage. Finally, we review the literature related to environmental mitochondrial toxicants, with a particular focus on those toxicants that target mitochondrial DNA. We conclude that the fields of environmental toxicology and environmental health should focus more strongly on mitochondria.
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Affiliation(s)
- Joel N Meyer
- Nicholas School of the Environment, Duke University, Durham, NC, USA.
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Lämsä V, Levonen AL, Sormunen R, Yamamoto M, Hakkola J. Heme and heme biosynthesis intermediates induce heme oxygenase-1 and cytochrome P450 2A5, enzymes with putative sequential roles in heme and bilirubin metabolism: different requirement for transcription factor nuclear factor erythroid- derived 2-like 2. Toxicol Sci 2012; 130:132-44. [PMID: 22859313 DOI: 10.1093/toxsci/kfs237] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Cytochrome P450 2A5 (CYP2A5) oxidizes bilirubin to biliverdin and represents a putative candidate for maintaining bilirubin at safe but adequate antioxidant levels. Curiously, CYP2A5 is induced by both excessive heme and chemicals that inhibit heme synthesis. We hypothesized that heme homeostasis is a key modifier of Cyp2a5 expression via transcription factor nuclear factor erythroid-derived 2-like 2 (Nrf2) and characterized the coordination of CYP2A5 and heme oxygenase-1 (HMOX1) responses using wild-type and Nrf2(-/-) primary mouse hepatocytes. HMOX1 was rapidly elevated by exogenous hemin, thereby limiting the transactivation of Cyp2a5 until high heme (> 5µM) exposure. Nrf2 was mandatory for CYP2A5 but not for HMOX1 induction by heme. CYP2A5 was intensively and HMOX1 moderately elevated in heme synthesis blockades by succinylacetone and N-methyl protoporphyrin IX, and Nrf2 partially mediated the induction of CYP2A5. Immunoelectron microscopy revealed that CYP2A5 is targeted Nrf2 dependently both to the endoplasmic reticulum (ER) and mitochondria. However, excessive heme increased CYP2A5 predominantly in the ER. Phenobarbital, dibutyryl-cAMP, and peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) overexpression stimulate heme biosynthesis and induce CYP2A5. Acute but not chronic CYP2A5 induction by phenobarbital required Nrf2, whereas CYP2A5 induction by dibutyryl-cAMP and PGC-1α was potentiated by Nrf2 knockout. Collectively, heme homeostasis is established as a crucial regulator of hepatic Cyp2a5 expression mediated via Nrf2 activation, whereas Nrf2 is redundant for Hmox1 induction by heme. Similar subcellular targeting and coordination of CYP2A5 and HMOX1 responses suggest favorable conditions for enhanced CYP2A5-mediated bilirubin maintenance in altered heme homeostasis that predisposes to oxidative stress.
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Affiliation(s)
- Virpi Lämsä
- Department of Pharmacology and Toxicology, Institute of Biomedicine, University of Oulu, 90014 Oulu, Finland
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Avadhani NG, Sangar MC, Bansal S, Bajpai P. Bimodal targeting of cytochrome P450s to endoplasmic reticulum and mitochondria: the concept of chimeric signals. FEBS J 2011; 278:4218-29. [PMID: 21929726 DOI: 10.1111/j.1742-4658.2011.08356.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Targeting signals are critical for proteins to find their specific cellular destination. Signals for protein targeting to the endoplasmic reticulum (ER), mitochondria, peroxisome and nucleus are distinct and the mechanisms of protein translocation across these membrane compartments also vary markedly. Recently, however, a number of proteins have been shown to be present in multiple cellular sites such as mitochondria and ER, cytosol and mitochondria, plasma membrane and mitochondria, and peroxisome and mitochondria suggesting the occurrence of multimodal targeting signals in some cases. Cytochrome P450 monooxygenases (CYPs), which play crucial roles in pharmacokinetics and pharmacodynamics of drugs and toxins, are the prototype of bimodally targeted proteins. Several members of family 1, 2 and 3 CYPs have now been reported to be associated with mitochondria and plasma membrane in addition to the ER. This review highlights the mechanisms of bimodal targeting of CYP1A1, 2B1, 2E1 and 2D6 to mitochondria and ER. The bimodal targeting of these proteins is driven by their N-terminal signals which carry essential elements of both ER targeting and mitochondria targeting signals. These multimodal signals have been termed chimeric signals appropriately to describe their dual targeting property. The cryptic mitochondrial targeting signals of CYP2B1, 2D6, 2E1 require activation by protein kinase A or protein kinase C mediated phosphorylation at sites immediately flanking the targeting signal and/or membrane anchoring regions. The cryptic mitochondria targeting signal of CYP1A1 requires activation by endoproteolytic cleavage by a cytosolic endoprotease, which exposes the mitochondrial signal. This review discusses both mechanisms of bimodal targeting and toxicological consequences of mitochondria targeted CYP proteins.
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Affiliation(s)
- Narayan G Avadhani
- Department of Animal Biology and the Mari Lowe Center for Comparative Oncology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
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Arthropod CYPomes illustrate the tempo and mode in P450 evolution. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2011; 1814:19-28. [DOI: 10.1016/j.bbapap.2010.06.012] [Citation(s) in RCA: 184] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 06/03/2010] [Accepted: 06/16/2010] [Indexed: 02/07/2023]
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Kobliakov VA. Mechanisms of tumor promotion by reactive oxygen species. BIOCHEMISTRY (MOSCOW) 2010; 75:675-85. [PMID: 20636258 DOI: 10.1134/s0006297910060015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review analyzes the available information concerning mechanisms of non-genotoxic action of reactive oxygen species (ROS) during tumor promotion and pathways of their generation under the influence of chemical compounds. Special attention is given to the ability of ROS to induce pseudohypoxia through inhibition of prolyl oxidase, which is an oxygen sensor in the cell. Functions of HIF-1alpha as a main contributor to the ROS-induced promotion are analyzed. Data suggest that an unregulated high level of HIF-1alpha in the cell could induce the development of tumors. Hypothetical possibilities of ROS production under the influence of different environmental pollutants, which are promoters of tumorigenesis, include functioning of cytochrome P450 during oxidation of substrates, functioning of the mitochondrial respiratory chain, and action of peroxisome proliferators.
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Affiliation(s)
- V A Kobliakov
- Blokhin Russian Cancer Research Center, Russian Academy of Medical Sciences, Moscow, Russia.
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Sangar MC, Bansal S, Avadhani NG. Bimodal targeting of microsomal cytochrome P450s to mitochondria: implications in drug metabolism and toxicity. Expert Opin Drug Metab Toxicol 2010; 6:1231-51. [PMID: 20629582 PMCID: PMC2940958 DOI: 10.1517/17425255.2010.503955] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
IMPORTANCE OF THE FIELD Microsomal CYPs are critical for drug metabolism and toxicity. Recent studies show that these CYPs are also present in the mitochondrial compartment of human and rodent tissues. Mitochondrial CYP1A1 and 2E1 show both overlapping and distinct metabolic activities compared to microsomal forms. Mitochondrial CYP2E1 also induces oxidative stress. The mechanisms of mitochondria targeting of CYPs and their role in drug metabolism and toxicity are important factors to consider while determining the drug dose and in drug development. AREAS COVERED IN THIS REVIEW This review highlights the mechanisms of bimodal targeting of CYP1A1, 2B1, 2E1 and 2D6 to mitochondria and microsomes. The review also discusses differences in structure and function of mitochondrial CYPs. WHAT THE READERS WILL GAIN A comprehensive review of the literature on drug metabolism in the mitochondrial compartment and their potential for inducing mitochondrial dysfunction. TAKE HOME MESSAGE Studies on the biochemistry, pharmacology and pharmacogenetic analysis of CYPs are mostly focused on the molecular forms associated with the microsomal membrane. However, the mitochondrial CYPs in some individuals can represent a substantial part of the tissue pool and contribute in a significant way to drug metabolism, clearance and toxicity.
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Affiliation(s)
- Michelle C Sangar
- University of Pennsylvania, School of Veterinary Medicine, Department of Animal Biology and the Mari Lowe Center for Comparative Oncology, Philadelphia, PA 19104, USA
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Alexeyenko A, Wassenberg DM, Lobenhofer EK, Yen J, Linney E, Sonnhammer ELL, Meyer JN. Dynamic zebrafish interactome reveals transcriptional mechanisms of dioxin toxicity. PLoS One 2010; 5:e10465. [PMID: 20463971 PMCID: PMC2864754 DOI: 10.1371/journal.pone.0010465] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Accepted: 03/17/2010] [Indexed: 01/09/2023] Open
Abstract
Background In order to generate hypotheses regarding the mechanisms by which 2,3,7,8-tetrachlorodibenzo-p-dioxin (dioxin) causes toxicity, we analyzed global gene expression changes in developing zebrafish embryos exposed to this potent toxicant in the context of a dynamic gene network. For this purpose, we also computationally inferred a zebrafish (Danio rerio) interactome based on orthologs and interaction data from other eukaryotes. Methodology/Principal Findings Using novel computational tools to analyze this interactome, we distinguished between dioxin-dependent and dioxin-independent interactions between proteins, and tracked the temporal propagation of dioxin-dependent transcriptional changes from a few genes that were altered initially, to large groups of biologically coherent genes at later times. The most notable processes altered at later developmental stages were calcium and iron metabolism, embryonic morphogenesis including neuronal and retinal development, a variety of mitochondria-related functions, and generalized stress response (not including induction of antioxidant genes). Within the interactome, many of these responses were connected to cytochrome P4501A (cyp1a) as well as other genes that were dioxin-regulated one day after exposure. This suggests that cyp1a may play a key role initiating the toxic dysregulation of those processes, rather than serving simply as a passive marker of dioxin exposure, as suggested by earlier research. Conclusions/Significance Thus, a powerful microarray experiment coupled with a flexible interactome and multi-pronged interactome tools (which are now made publicly available for microarray analysis and related work) suggest the hypothesis that dioxin, best known in fish as a potent cardioteratogen, has many other targets. Many of these types of toxicity have been observed in mammalian species and are potentially caused by alterations to cyp1a.
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Affiliation(s)
- Andrey Alexeyenko
- Stockholm Bioinformatics Centre, Stockholm University, Stockholm, Sweden
| | - Deena M. Wassenberg
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America
| | | | - Jerry Yen
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Elwood Linney
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America
| | | | - Joel N. Meyer
- Nicholas School of the Environment, Duke University, Durham, North Carolina, United States of America
- * E-mail:
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Mačak-Šafranko Z, Sobočanec S, Sarić A, Balog T, Sverko V, Kušić B, Marotti T. Cytochrome P450 gender-related differences in response to hyperoxia in young CBA mice. ACTA ACUST UNITED AC 2010; 63:345-50. [PMID: 20227864 DOI: 10.1016/j.etp.2010.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 02/08/2010] [Accepted: 02/18/2010] [Indexed: 12/22/2022]
Abstract
Cytochrome P450 monooxygenases (CYPs) represent large class of heme-containing enzymes that catalyze the metabolism of various endogenous and exogenous substrates. Although they are found in many tissues, the function of the particular subset of their isoforms does not appear to be the same. Many CYP genes exhibit sexually dimorphic expression, while others are sex-independent. Moreover, as a source of reactive oxygen species (ROS), P450 system is believed to play the important role in various pathological conditions and diseases. The aim of this study was to observe the effect of hyperoxia on oxidant/antioxidant status in the liver of young male and female mice and to determine whether the observed effects are associated with the expression of Heme oxygenase-1 (HO-1) and CYP genes associated with stress (Cyp1a1, Cyp1a2, Cyp2a5, and Cyp2e1) or stress and gender-related responses (Cyp2b9). In this study, we demonstrated gender-related effect of hyperoxia on oxidant/antioxidant status and on expression of certain P450 enzymes. Our results suggest that females are less susceptible to hyperoxia induced oxidative stress by two major mechanisms: upregulated expression of HO-1 genes and different expression of certain P450 enzymes. Therefore, our study could provide additional data of gender-dependent responses in susceptibility to oxidative stress, chemical toxicity and drug efficiency in treatment of diseases.
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Affiliation(s)
- Zeljka Mačak-Šafranko
- Division of Molecular Medicine, Institute Ruđer Bošković, Bijenička 54, 10000 Zagreb, Croatia
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Abstract
Cytochrome P450 enzyme system consists of P450 and its NAD(P)H-linked reductase or reducing system, and catalyses monooxygenation reactions. The most prevalent type in eukaryotic organisms is 'microsomes type', which consists of membrane-bound P450 and NADPH-P450 reductase. The second type is 'mitochondria type', in which P450 is bound to the inner membrane while the reducing system consisting of an NADPH-linked flavoprotein and a ferredoxin-type iron-sulphur protein is soluble in the matrix space. The third type is 'bacteria type', in which both P450 and the reducing system are soluble in the cytoplasm. In addition to these three types, several forms of P450-reductase fusion proteins have been found in prokaryotic organisms. On the other hand, some P450s catalyse the re-arrangement of the oxygen atoms in the substrate molecules that does not require the supply of reducing equivalents for the reaction. A peculiar P450, P450nor, receives electrons directly from NADH for the reduction of nitric oxide.
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Affiliation(s)
- Tsuneo Omura
- Kyushu University, Kyushu University, Fukuoka, Fukuoka 811-8582, Japan.
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Jung D, Di Giulio RT. Identification of mitochondrial cytochrome P450 induced in response to polycyclic aromatic hydrocarbons in the mummichog (Fundulus heteroclitus). Comp Biochem Physiol C Toxicol Pharmacol 2010; 151:107-12. [PMID: 19758578 PMCID: PMC2787737 DOI: 10.1016/j.cbpc.2009.09.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Revised: 09/03/2009] [Accepted: 09/07/2009] [Indexed: 11/19/2022]
Abstract
Increasing evidence suggests that polycyclic aromatic hydrocarbons (PAHs) such as benzo[a]pyrene (BaP) are localized to the mitochondria. Because the toxic effects of many PAHs are the result of metabolism by cytochrome P4501A (CYP1A), it is important to investigate whether active forms of these enzymes can be identified in the mitochondria. In this study, we identified mitochondrial P450s with a monoclonal antibody against scup (Stenotomus chrysops) CYP1A in the isolated mitochondrial fraction of the liver from adult male mummichog (Fundulus heteroclitus) livers. The size of the protein in the mitochondria was similar to that of microsomal CYP1A. Fish dosed with 10mg/kg BaP had increased EROD activity in the mitochondrial fraction compared to controls. In mummichog larvae dosed with 100 microg/L BaP and 100 microg/L benzo[k]fluoranthene, CYP1A protein levels as well as enzyme activity were elevated. However, fish from a PAH-polluted Superfund site (Elizabeth River, Portsmouth VA) showed recalcitrant mitochondrial CYP1A protein levels and enzyme activity in a similar manner to microsomal CYP1A.
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Affiliation(s)
| | - Richard T. Di Giulio
- Corresponding Author: Nicholas School of the Environment, Duke University, Box 90328, Durham, NC 27708, USA, Phone: (919) 613-8024; Fax: (919) 668-1799,
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Dong H, Dalton TP, Miller ML, Chen Y, Uno S, Shi Z, Shertzer HG, Bansal S, Avadhani NG, Nebert DW. Knock-in mouse lines expressing either mitochondrial or microsomal CYP1A1: differing responses to dietary benzo[a]pyrene as proof of principle. Mol Pharmacol 2008; 75:555-67. [PMID: 19047483 DOI: 10.1124/mol.108.051888] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
In the past, CYP1A1 protein was known to be located in the endoplasmic reticulum (ER; microsomes). More recently, CYP1A1 was shown also to be targeted to the inner mitochondrial membrane; mitochondrial import is dependent on NH(2)-terminal processing that exposes a cryptic targeting signal. It is interesting that microsomal and mitochondrial CYP1A1 enzymes exhibit different substrate specificities, electron donors, and inducer properties. To understand the physiological functions of microsomal versus mitochondrial CYP1A1, we have generated three knock-in lines by altering the CYP1A1 NH(2) terminus. Cyp1a1(mtt/mtt) mice encode an NH(2)-terminal 31-amino acid-truncated protein, deleting the ER-targeting signal and exposing the cryptic mitochondrial-targeting signal. Cyp1a1(mtp/mtp) mice encode a protein carrying L7N and L17N mutations; this mutant lacks the signal recognition particle (SRP)-binding site and subsequent ER-targeting, but requires proteolysis by a cytosolic peptidase for mitochondrial import. Cyp1a1(mc/mc) mice encode a microsomal protein having R34D and K39I mutations, which abolish the mitochondrial targeting signal. After dioxin or beta-naphthoflavone treatment of these mouse lines, the CYP1A1 protein was shown to be located in the mitochondria of the Cyp1a1(mtp/mtp) and Cyp1a1(mtt/mtt) lines and in microsomes of the Cyp1a1(mc/mc) line. To test for differences in function, we compared the response to dietary benzo[a]pyrene (BaP). After 18 days of daily oral BaP, wild-type and Cyp1a1(mc/mc) mice were completely protected, whereas Cyp1a1(-/-) and Cyp1a1(mtp/mtp) mice showed striking toxicity and compensatory up-regulation of CYP1A2 and CYP1B1 mRNA in several tissues. Our data support the likelihood that it is the microsomal rather than mitochondrial CYP1A1 enzyme that protects against oral BaP toxicity.
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Affiliation(s)
- Hongbin Dong
- Department of Environmental Health,Center for Environmental Genetics, University of Cincinnati Medical Center, Cincinnati OH 45267-0056
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Kopf PG, Huwe JK, Walker MK. Hypertension, cardiac hypertrophy, and impaired vascular relaxation induced by 2,3,7,8-tetrachlorodibenzo-p-dioxin are associated with increased superoxide. Cardiovasc Toxicol 2008; 8:181-93. [PMID: 18850075 DOI: 10.1007/s12012-008-9027-x] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2008] [Accepted: 09/23/2008] [Indexed: 02/07/2023]
Abstract
The mechanisms by which 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) increases the incidence of human cardiovascular disease are not known. We investigated the degree to which cardiovascular disease develops in mice following subchronic TCDD exposure. Adult male C57BL/6 mice were dosed with vehicle or 300 ng TCDD/kg by oral gavage three times per week for 60 days. Blood pressure was recorded by radiotelemetry and aortic endothelial function was assessed by acetylcholine-induced vasorelaxation. Mean arterial pressure of TCDD-exposed mice was increased significantly by day 4 and between days 7-10, 25-35, and 45-60 with two periods of normalization on days 11-24 and days 36-39. Consistent with a prolonged period of systemic hypertension, heart weight was increased and was associated with concentric left ventricular hypertrophy. Significant increases in superoxide production also were observed in the kidney, heart, and aorta of TCDD-exposed mice. Furthermore, increased aortic superoxide resulted in endothelial dysfunction as demonstrated by significant impairment of acetylcholine-induced vasorelaxation in TCDD-exposed mice, which was restored by tempol, a superoxide dismutase (SOD) mimetic. Our model is the first to definitely demonstrate that sustained AhR activation by TCDD increases blood pressure and induces cardiac hypertrophy, which may be mediated, in part, by increased superoxide.
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Affiliation(s)
- Phillip G Kopf
- College of Pharmacy, University of New Mexico Health Sciences Center, MSC09 5360, 2502 Marble NE, Albuquerque, NM 87131, USA.
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Myasoedova KN. New findings in studies of cytochromes P450. BIOCHEMISTRY (MOSCOW) 2008; 73:965-9. [DOI: 10.1134/s0006297908090022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Neve EPA, Ingelman-Sundberg M. Intracellular transport and localization of microsomal cytochrome P450. Anal Bioanal Chem 2008; 392:1075-84. [DOI: 10.1007/s00216-008-2200-z] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2008] [Revised: 05/19/2008] [Accepted: 05/21/2008] [Indexed: 11/27/2022]
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Labitzke EM, Diani-Moore S, Rifkind AB. Mitochondrial P450-dependent arachidonic acid metabolism by TCDD-induced hepatic CYP1A5; conversion of EETs to DHETs by mitochondrial soluble epoxide hydrolase. Arch Biochem Biophys 2007; 468:70-81. [PMID: 17959137 PMCID: PMC2868376 DOI: 10.1016/j.abb.2007.08.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Revised: 08/06/2007] [Accepted: 08/13/2007] [Indexed: 01/18/2023]
Abstract
Several P450 enzymes localized in the endoplasmic reticulum and thought to be involved primarily in xenobiotic metabolism, including mouse and rat CYP1A1 and mouse CYP1A2, have also been found to translocate to mitochondria. We report here that the environmental toxin 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induces enzymatically active CYP1A4/1A5, the avian orthologs of mammalian CYP1A1/1A2, in chick embryo liver mitochondria as well as in microsomes. P450 proteins and activity levels (CYP1A4-dependent 7-ethoxyresorufin-O-deethylase and CYP1A5-dependent arachidonic acid epoxygenation) in mitochondria were 23-40% of those in microsomes. DHET formation by mitochondria was twice that of microsomes and was attributable to a mitochondrial soluble epoxide hydrolase as confirmed by Western blotting with antiEPHX2, conversion by mitochondria of pure 11,12 and 14,15-EET to the corresponding DHETs and inhibition of DHET formation by the soluble epoxide hydrolase inhibitor, 12(-3-adamantan-1-yl-ureido)-dodecanoic acid (AUDA). TCDD also suppressed formation of mitochondrial and microsomal 20-HETE. The findings newly identify mitochondria as a site of P450-dependent arachidonic acid metabolism and as a potential target for TCDD effects. They also demonstrate that mitochondria contain soluble epoxide hydrolase and underscore a role for CYP1A in endobiotic metabolism.
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Affiliation(s)
- Erin M Labitzke
- Weill Medical College of Cornell University, Department of Pharmacology, 1300 York Avenue, Room LC-401, New York, NY 10021, USA
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Upham J, Acott PD, O'regan P, Sinal CJ, Crocker JFS, Geldenhuys L, Murphy MG. The pesticide adjuvant, Toximul™, alters hepatic metabolism through effects on downstream targets of PPARα. Biochim Biophys Acta Mol Basis Dis 2007; 1772:1057-64. [PMID: 17643967 DOI: 10.1016/j.bbadis.2007.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2007] [Revised: 06/01/2007] [Accepted: 06/08/2007] [Indexed: 11/23/2022]
Abstract
Previous studies demonstrated that chronic dermal exposure to the pesticide adjuvant (surfactant), Toximul (Tox), has significant detrimental effects on hepatic lipid metabolism. This study demonstrated that young mice dermally exposed to Tox for 12 days have significant increases in expression of peroxisomal acyl-CoA oxidase (mRNA and protein), bifunctional enzyme (mRNA) and thiolase (mRNA), as well as the P450 oxidizing enzymes Cyp4A10 and Cyp4A14 (mRNA and protein). Tox produced a similar pattern of increases in wild type adult female mice but did not induce these responses in PPARalpha-null mice. These data support the hypothesis that Tox, a heterogeneous blend of nonionic and anionic surfactants, modulates hepatic metabolism at least in part through activation of PPARalpha. Notably, all three groups of Tox-treated mice had increased relative liver weights due to significant accumulation of lipid. This could be endogenous in nature and/or a component(s) of Tox or a metabolite thereof. The ability of Tox and other hydrocarbon pollutants to induce fatty liver despite being PPARalpha agonists indicates a novel consequence of exposure to this class of chemicals, and may provide a new understanding of fatty liver in populations with industrial exposure.
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Affiliation(s)
- Jacqueline Upham
- Departments of Physiology and Biophysics, 5850 College Street, Sir Charles Tupper Medical Building, Dalhousie University, Halifax, Nova Scotia, Canada B3H 1X5
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Takahashi O, Oishi S, Yoneyama M, Ogata A, Kamimura H. Antiestrogenic effect of paradichlorobenzene in immature mice and rats. Arch Toxicol 2007; 81:505-17. [PMID: 17593412 DOI: 10.1007/s00204-007-0179-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2006] [Accepted: 01/09/2007] [Indexed: 10/23/2022]
Abstract
A significant increase/decrease in uterine and ovarian weights was occasionally seen in immature mice and rats subcutaneously administered paradichlorobenzene (PDCB) at doses of 22-67 mg/kg/day, but the results were not necessarily reproducible. PDCB at a dose of 800 mg/kg/day always reduced uterine and ovarian weights. Intraperitoneal PDCB at doses more than 400 mg/kg/day significantly inhibited the uterotrophic effect of beta-estradiol (E2) in CD-1 (ICR) mice. E2-induced uterotrophy was dose-dependently prevented by 204-400 mg PDCB/kg/day in C57BL/6N (Ah responsive) mice but not DBA/2N (Ah non-responsive) mice. While PDCB did not bind to estrogen receptor (ER(alpha)) up to 10(-3) M. Hepatic ethoxyresorufin-O-deethylase in adult female C57BL/6N mice was induced by i.p. administration of PDCB. Induction activity of PDCB may be 10(5)-10(6) times lower than that of 2,3,7,8-tetrachlorodibenzo-p-dioxin. These results suggest that PDCB is a weak antiestrogenic/antiuterotrophic compound possibly due to ER modulation through arylhydrocarbon receptor.
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Affiliation(s)
- Osamu Takahashi
- Department of Environmental Health and Toxicology, Tokyo Metropolitan Institute of Public Health, 24-1 Hyakunincho 3-chome, Shinjuku-ku, Tokyo, 169-0073, Japan.
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Omura T. Mitochondrial P450s. Chem Biol Interact 2006; 163:86-93. [DOI: 10.1016/j.cbi.2006.06.008] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2006] [Revised: 06/20/2006] [Accepted: 06/26/2006] [Indexed: 01/08/2023]
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