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Zhao H, Wang L, Lei Y, Wang Y, Yang D, Zhou Y, Yuan X. Identification of a novel CYP4V gene in the polychaete Perinereis aibuhitensis: transcriptional comparison with a CYP4B gene exposed to PAHs. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:47527-47538. [PMID: 35182348 DOI: 10.1007/s11356-022-18992-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
Polychaete worms can biotransform polycyclic aromatic hydrocarbons (PAHs) in environments, and the cytochrome P450 (CYP) enzyme plays an important role in this process. Herein, a novel cytochrome P450 gene was identified and characterized from the polychaete worm Perinereis aibuhitensis. The full-length cDNA, which is named CYP4V82, is 1709 bp encoding a protein of 509 amino acids and has high similarity to CYP4V. The expression levels of CYP4V82 and CYP4BB4 (a CYP gene identified from P. aibuhitensis in a previous study, Chen et al. Mar Pollut Bull 64:1782-1788, 2012) exposure to various concentrations of benzo[a]pyrene (B[a]P) (0.5, 2, 4, and 8 μg/L) and same mass concentrations of fluoranthene (Flu, 3.2 μg/L), phenanthrene (Phe, 2.9 μg/L), B[a]P (4.0 μg/L) were detected to identify the function of the CYP4 family in P. aibuhitensis. Compared with CYP4BB4, CYP4V82 mRNA was minimally expressed on day 7 but highly sensitive on day 14. Notably, the expression levels of CYP4V82 and CYP4BB4 were relatively different in short-term responses to PAHs with different benzene rings of the same concentration. The expression of CYP4V82 in the B[a]P group was the highest, while that of CYP4BB4 in the Phe group was relatively higher than the two other groups. These findings suggest that PAHs are associated with the induction of CYP4V82 and CYP4BB4 expressions in P. aibuhitensis, which may have different efficiencies in the detoxification of PAHs.
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Affiliation(s)
- Huan Zhao
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, People's Republic of China
- Dalian Ocean University, Dalian, 116023, People's Republic of China
| | - Lili Wang
- Ministry of Ecology and Environment, National Marine Environmental Monitoring Center, Dalian, 116023, People's Republic of China
| | - Yan Lei
- Dalian Ocean University, Dalian, 116023, People's Republic of China
- Ministry of Ecology and Environment, National Marine Environmental Monitoring Center, Dalian, 116023, People's Republic of China
| | - Yinan Wang
- Dalian Ocean University, Dalian, 116023, People's Republic of China
- Ministry of Ecology and Environment, National Marine Environmental Monitoring Center, Dalian, 116023, People's Republic of China
| | - Dazuo Yang
- Dalian Ocean University, Dalian, 116023, People's Republic of China
| | - Yibing Zhou
- Dalian Ocean University, Dalian, 116023, People's Republic of China
| | - Xiutang Yuan
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, People's Republic of China.
- Ministry of Ecology and Environment, National Marine Environmental Monitoring Center, Dalian, 116023, People's Republic of China.
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Pulliero A, Iodice S, Pesatori AC, Vigna L, Khalid Z, Bollati V, Izzotti A. The Relationship between Exposure to Airborne Particulate and DNA Adducts in Blood Cells in an Urban Population of Subjects with an Unhealthy Body Mass Index. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19095761. [PMID: 35565154 PMCID: PMC9105958 DOI: 10.3390/ijerph19095761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/04/2022] [Accepted: 05/06/2022] [Indexed: 01/27/2023]
Abstract
Bulky DNA adducts are a combined sign of aromatic chemical exposure, as well as an individual's ability to metabolically activate carcinogens and repair DNA damage. The present study aims to investigate the association between PM exposure and DNA adducts in blood cells, in a population of 196 adults with an unhealthy BMI (≥25). For each subject, a DNA sample was obtained for quantification of DNA adducts by sensitive32P post-labelling methods. Individual PM10 exposure was derived from daily mean concentrations measured by single monitors in the study area and then assigned to each subject by calculating the mean of the 30 days (short-term exposure), and of the 365 (long-term exposure) preceding enrolment. Multivariable linear regression models were used to study the association between PM10 and DNA adducts. The majority of analysed samples had bulky DNA adducts, with an average value of 3.7 ± 1.6 (mean ± SD). Overall, the findings of the linear univariate and multiple linear regression showed an inverse association between long-term PM10 exposure and adduct levels; this unexpected result might be since the population consists of subjects with an unhealthy BMI, which might show an atypical reaction to airborne urban pollutants; a hermetic response which happens when small amounts of pollutants are present. Pollutants can linger for a long time in the adipose tissue of obese persons, contributing to an increase in oxidative DNA damage, inflammation, and thrombosis when exposure is sustained.
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Affiliation(s)
- Alessandra Pulliero
- Department of Health Sciences, University of Genoa, 16132 Genoa, Italy;
- Correspondence: ; Tel.: +39-010-3538509
| | - Simona Iodice
- Epiget Lab, Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy; (S.I.); (A.C.P.); (V.B.)
| | - Angela Cecilia Pesatori
- Epiget Lab, Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy; (S.I.); (A.C.P.); (V.B.)
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy;
| | - Luisella Vigna
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy;
| | - Zumama Khalid
- Department of Health Sciences, University of Genoa, 16132 Genoa, Italy;
| | - Valentina Bollati
- Epiget Lab, Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy; (S.I.); (A.C.P.); (V.B.)
| | - Alberto Izzotti
- Department of Experimental Medicine, University of Genoa, 16132 Genoa, Italy;
- IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
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Galligan TM, Schwacke LH, McFee WE, Boggs ASP. Evidence for cortisol-cortisone metabolism by marine mammal blubber. MARINE BIOLOGY 2018; 165:10.1007/s00227-018-3373-4. [PMID: 31579267 PMCID: PMC6774200 DOI: 10.1007/s00227-018-3373-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 06/11/2018] [Indexed: 05/06/2023]
Abstract
Blubber, a specialized hyperdermic adipose tissue found in marine mammals, has been identified as a useful tissue for the assessment of steroid hormone homeostasis in cetaceans. However, blubber cortisol measurements are not quantitatively predictive of circulating cortisol concentrations in bottlenose dolphins. In other mammals, adipose tissue metabolizes steroid hormones. Thus, it is proposed that the disagreement between blubber and blood cortisol in bottlenose dolphins could be due in part to metabolism of corticosteroids in blubber. The purpose of this study is to characterize the ability of blubber to interconvert cortisol and cortisone using an in vitro design. Results demonstrate that bottlenose dolphin blubber microsomes interconvert cortisol and cortisone, an effect that is abated by denaturing the microsomes, indicating this is an enzymatic process. These findings lead to the conclusion that blubber is likely a site of active steroid metabolism, which should be considered in future studies utilizing blubber as a matrix for endocrine assessment.
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Affiliation(s)
- Thomas M. Galligan
- College of Graduate Studies, Medical University of South Carolina, 331 Fort Johnson Road, Charleston, SC 29412, USA
- JHT, Inc. Under Contract to the National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, USA
- Department of Fish and Wildlife Conservation, Virginia Polytechnic Institute and State University, 310 West Campus Drive, Cheatham Hall Rm 101, Blacksburg 24060, VA, USA
| | - Lori H. Schwacke
- National Marine Mammal Foundation, 2240 Shelter Island Drive Suite 200, San Diego, CA 92106, USA
| | - Wayne E. McFee
- National Oceanic and Atmospheric Administration, National Ocean Service, Center for Coastal Environmental Health and Biomolecular Research, 219 Fort Johnson Road, Charleston 29412, SC, USA
| | - Ashley S. P. Boggs
- National Institute of Standards and Technology, Chemical Sciences Division, Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, USA
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Yang F, Yang H, Ramesh A, Goodwin JS, Okoro EU, Guo Z. Overexpression of Catalase Enhances Benzo(a)pyrene Detoxification in Endothelial Microsomes. PLoS One 2016; 11:e0162561. [PMID: 27607467 PMCID: PMC5015903 DOI: 10.1371/journal.pone.0162561] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 08/24/2016] [Indexed: 02/07/2023] Open
Abstract
We previously reported that overexpression of catalase upregulated xenobiotic- metabolizing enzyme (XME) expression and diminished benzo(a)pyrene (BaP) intermediate accumulation in mouse aortic endothelial cells (MAECs). Endoplasmic reticulum (ER) is the most active organelle involved in BaP metabolism. To examine the involvement of ER in catalase-induced BaP detoxification, we compared the level and distribution of XMEs, and the profile of BaP intermediates in the microsomes of wild-type and catalase transgenic endothelial cells. Our data showed that endothelial microsomes were enriched in cytochrome P450 (CYP) 1A1, CYP1B1 and epoxide hydrolase 1 (EH1), and contained considerable levels of NAD(P)H: quinone oxidoreductase-1 (NQO1) and glutathione S-transferase-pi (GSTP). Treatment of wild-type MAECs with 1μM BaP for 2 h increased the expression of microsomal CYP1A1, 1B1 and NQO1 by ~300, 64 and 116%, respectively. However, the same treatment did not significantly alter the expression of EH1 and GSTP. Overexpression of catalase did not significantly increase EH1, but upregulated BaP-induced expression of microsomal CYP1A1, 1B1, NQO1 and GSTP in the following order: 1A1>NQO1>GSTP>1B1. Overexpression of catalase did not alter the distribution of each of these enzymes in the microsomes. In contrast to our previous report showing lower level of BaP phenols versus BaP diols/diones in the whole-cell, this report demonstrated that the sum of microsomal BaP phenolic metabolites were ~60% greater than that of the BaP diols/diones after exposure of microsomes to BaP. Overexpression of catalase reduced the concentrations of microsomal BaP phenols and diols/diones by ~45 and 95%, respectively. This process enhanced the ratio of BaP phenol versus diol/dione metabolites in a potent manner. Taken together, upregulation of phase II XMEs and CYP1 proteins, but not EH1 in the ER might be the mechanism by which overexpression of catalase reduces the levels of all the BaP metabolites, and enhances the ratio of BaP phenolic metabolites versus diol/diones in endothelial microsomes.
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Affiliation(s)
- Fang Yang
- Department of Physiology, Meharry Medical College, Nashville, United States of America.,Wuhan University School of Basic Medical Science, Wuhan, P.R. China
| | - Hong Yang
- Department of Physiology, Meharry Medical College, Nashville, United States of America
| | - Aramandla Ramesh
- Department of Biochemistry and Cancer Biology, Meharry Medical College, Nashville, United States of America
| | - J Shawn Goodwin
- Department of Biochemistry and Cancer Biology, Meharry Medical College, Nashville, United States of America
| | - Emmanuel U Okoro
- Department of Physiology, Meharry Medical College, Nashville, United States of America
| | - ZhongMao Guo
- Department of Physiology, Meharry Medical College, Nashville, United States of America
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Tetreau G, Chandor-Proust A, Faucon F, Stalinski R, Akhouayri I, Prud'homme SM, Régent-Kloeckner M, Raveton M, Reynaud S. UV light and urban pollution: bad cocktail for mosquitoes? AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 146:52-60. [PMID: 24275062 DOI: 10.1016/j.aquatox.2013.10.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 10/18/2013] [Accepted: 10/29/2013] [Indexed: 06/02/2023]
Abstract
Mosquito breeding sites consist of water pools, which can either be large open areas or highly covered ponds with vegetation, thus with different light exposures combined with the presence in water of xenobiotics including polycyclic aromatic hydrocarbons (PAHs) generated by urban pollution. UV light and PAHs are abiotic factors known to both affect the mosquito insecticide resistance status. Nonetheless, their potential combined effects on the mosquito physiology have never been investigated. The present article aims at describing the effects of UV exposure alongside water contamination with two major PAH pollutants (fluoranthene and benzo[a]pyrene) on a laboratory population of the yellow fever mosquito Aedes aegypti. To evaluate the effects of PAH exposure and low energetic UV (UV-A) irradiation on mosquitoes, different parameters were measured including: (1) The PAH localization and its impact on cell mortality by fluorescent microscopy; (2) The detoxification capacities (cytochrome P450, glutathione-S-transferase, esterase); (3) The responses to oxidative stress (Reactive Oxygen Species-ROS) and (4) The tolerance of mosquito larvae to a bioinsecticide (Bacillus thuringiensis subsp. israelensis-Bti) and to five chemical insecticides (DDT, imidacloprid, permethrin, propoxur and temephos). Contrasting effects regarding mosquito cell mortality, detoxification and oxidative stress were observed as being dependent on the pollutant considered, despite the fact that the two PAHs belong to the same family. Moreover, UV is able to modify pollutant effects on mosquitoes, including tolerance to three insecticides (imidacloprid, propoxur and temephos), cell damage and response to oxidative stress. Taken together, our results suggest that UV and pollution, individually or in combination, are abiotic parameters that can affect the physiology and insecticide tolerance of mosquitoes; but the complexity of their direct effect and of their interaction will require further investigation to know in which condition they can affect the efficacy of insecticide-based vector control strategies in the field.
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Affiliation(s)
- Guillaume Tetreau
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France; Department of Entomology, Cornell University, New York State Agricultural Experiment Station, Geneva, NY 14456, USA.
| | - Alexia Chandor-Proust
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France
| | - Frédéric Faucon
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France
| | - Renaud Stalinski
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France
| | - Idir Akhouayri
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France
| | - Sophie M Prud'homme
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France
| | - Myriam Régent-Kloeckner
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France
| | - Muriel Raveton
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France
| | - Stéphane Reynaud
- Laboratoire d'Ecologie Alpine, LECA-UMR 5553, Université de Grenoble 1, BP 53, 38041 Grenoble cedex 09, France
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Harris KL, Myers JN, Ramesh A. Benzo(a)pyrene modulates fluoranthene-induced cellular responses in HT-29 colon cells in a dual exposure system. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2013; 36:358-367. [PMID: 23732482 PMCID: PMC3826174 DOI: 10.1016/j.etap.2013.04.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 04/16/2013] [Accepted: 04/24/2013] [Indexed: 05/30/2023]
Abstract
Our environment is contaminated with a diverse array of chemicals; one of which is polycyclic aromatic hydrocarbons (PAHs). While some PAHs are potent by nature, others undergo interactions such as additivity, synergism, antagonism or potentiation to manifest their toxicity. Therefore, the objective of this study was to investigate whether exposure to benzo(a)pyrene (BaP), a PAH compound influences the cytotoxicity and metabolism of fluoranthene (FLA; another PAH compound) using HT-29 cells. Cells cultured in Dulbecco's Modified Eagle Medium were treated with 1, 5, 10, 25μM BaP and FLA (0.01% dimethylsulfoxide as vehicle) individually and in combination over the course of 0-96h. At the end of exposure, cells were stained with propidium iodide and the changes in cell cycle were analyzed using FACS analysis. Apoptosis was determined by caspase-3 assay. Post-incubation, samples were extracted and analyzed for FLA metabolites by reverse-phase HPLC with fluorescence detection. Cells exposed to BaP+FLA showed a marginal decrease in growth as compared to FLA alone and vehicle controls. Also, a decline in the percentage of cells in the S and G2 phases compared to G1 phase of cell cycle was noted when cells were treated with BaP and FLA together, compared to individual FLA treatment. The rate of FLA metabolism was more when cells were exposed to FLA in combination with BaP, compared to FLA alone. The enhanced biotransformation of FLA as a result of concomitant exposure to BaP may have implications for colon cancer risks arising from human dietary exposure to PAH mixtures through consumption of barbecued meat.
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Affiliation(s)
- Kelly L Harris
- Department of Biochemistry & Cancer Biology, Meharry Medical College, 1005 D.B. Todd Boulevard, Nashville, TN 37208, USA
| | - Jeremy N Myers
- Department of Biochemistry & Cancer Biology, Meharry Medical College, 1005 D.B. Todd Boulevard, Nashville, TN 37208, USA
| | - Aramandla Ramesh
- Department of Biochemistry & Cancer Biology, Meharry Medical College, 1005 D.B. Todd Boulevard, Nashville, TN 37208, USA.
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Diggs DL, Harris KL, Rekhadevi PV, Ramesh A. Tumor microsomal metabolism of the food toxicant, benzo(a)pyrene, in ApcMin mouse model of colon cancer. Tumour Biol 2012; 33:1255-60. [PMID: 22430258 DOI: 10.1007/s13277-012-0375-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2012] [Accepted: 03/05/2012] [Indexed: 12/22/2022] Open
Abstract
The present study was conducted to investigate whether colon tumors were capable of metabolizing benzo(a)pyrene (BaP), and fluoranthene (FLA), two toxicants that belong to the polycyclic aromatic hydrocarbon family of compounds. Microsomes were isolated from the colon tumors of Apc( Min ) mice that received subchronic doses of 50 μg/kg BaP and incubated with either BaP or FLA (3 μM each) alone or in combination and appropriate control groups that received nothing. Subsequent to incubation, samples were extracted with ethyl acetate and analyzed for BaP and FLA metabolites by reverse-phase HPLC equipped with fluorescence detection. Microsomes from tumor tissues were found to metabolize BaP to a greater extent than those from the non-tumor tissues. The rate of BaP metabolism (picomoles of metabolite per minute per milligram of protein) was found to be more when microsomes from BaP-pretreated mice were exposed to BaP alone and FLA in combination with BaP, compared to controls. The microsomes from BaP-preexposed mice generated greater proportion of BaP 7,8-diol and BaP 3,6- and 6,12-diones compared to other experimental groups. Additionally, microsomes from BaP-pretreated mice produced greater proportion of FLA 2, 3-diol and 2, 3 D FLA when microsomes were incubated with FLA alone or a combination of BaP and FLA. Our studies revealed that the tumor microsomes were competent to metabolize BaP and FLA either singly or in combination. The biotransformation of BaP and FLA as a consequence of prior and simultaneous exposure to BaP may influence the growth of tumors. Our findings may have relevance to human long-term dietary intake of these toxicants and the consequent acceleration of the colon carcinogenesis process.
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Affiliation(s)
- Deacqunita L Diggs
- Department of Biochemistry and Cancer Biology, Meharry Medical College, 1005 D.B. Todd Blvd., Nashville, TN 37208, USA
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