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Tang Y, Ren Q, Wen Q, Yu C, Xie X, Hu Q, Du Y. Effect of methyl tert-butyl ether on adipogenesis and glucose metabolism in vitro and in vivo. J Environ Sci (China) 2019; 85:208-219. [PMID: 31471028 DOI: 10.1016/j.jes.2019.06.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 06/25/2019] [Accepted: 06/25/2019] [Indexed: 06/10/2023]
Abstract
Methyl tert-butyl ether (MTBE), as a widely used gasoline additive, is suspected of being environmentally toxic. MTBE accumulates mainly in adipose tissue, but its effect on obesity or obesity-related metabolic disorders has not been well understood yet. Therefore, we examined the effect of MTBE on the adipose function and the related metabolic processes with both 3T3-L1 cell line and C57BL/6J mice model. We found that exposure to MTBE at the environmental relevant concentration (100 μmol/L) could significantly induce differentiation of preadipocyte and disturb insulin-stimulated glucose uptake of mature adipocyte. The in vivo observation in male mice showed a positive correlation of visceral white adipose tissue (vWAT) expansion and cell size increase with MTBE treatment in 14 weeks. Glucose tolerance and insulin sensitivity tests demonstrated that MTBE at 1000 μg/(kg·day) disturbed the systemic glucose metabolism in a gender-specific manner, which might be partly attributed to the alterations of gut microbiota community at genus level with respect to Akkermansia, Clostridium XlVb, and Megamonas. In summary, our study characterized the effect of MTBE on adipose tissue function and glucose homeostasis in vitro and in vivo, and revealed that systemic disorders of the glucose metabolism might be modulated by the related gut microbiota.
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Affiliation(s)
- Yue Tang
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: .; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qidong Ren
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: .; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qing Wen
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: .; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Caixia Yu
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: .; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinni Xie
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: ..
| | - Qing Hu
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yuguo Du
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: .; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
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Marty MS, Borgert C, Coady K, Green R, Levine SL, Mihaich E, Ortego L, Wheeler JR, Yi KD, Zorrilla LM. Distinguishing between endocrine disruption and non-specific effects on endocrine systems. Regul Toxicol Pharmacol 2018; 99:142-158. [PMID: 30217484 DOI: 10.1016/j.yrtph.2018.09.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 09/04/2018] [Indexed: 10/28/2022]
Abstract
The endocrine system is responsible for growth, development, maintaining homeostasis and for the control of many physiological processes. Due to the integral nature of its signaling pathways, it can be difficult to distinguish endocrine-mediated adverse effects from transient fluctuations, adaptive/compensatory responses, or adverse effects on the endocrine system that are caused by mechanisms outside the endocrine system. This is particularly true in toxicological studies that require generation of effects through the use of Maximum Tolerated Doses (or Concentrations). Endocrine-mediated adverse effects are those that occur as a consequence of the interaction of a chemical with a specific molecular component of the endocrine system, for example, a hormone receptor. Non-endocrine-mediated adverse effects on the endocrine system are those that occur by other mechanisms. For example, systemic toxicity, which perturbs homeostasis and affects the general well-being of an organism, can affect endocrine signaling. Some organs/tissues can be affected by both endocrine and non-endocrine signals, which must be distinguished. This paper examines in vitro and in vivo endocrine endpoints that can be altered by non-endocrine processes. It recommends an evaluation of these issues in the assessment of effects for the determination of endocrine disrupting properties of chemicals. This underscores the importance of using a formal weight of evidence (WoE) process to evaluate potential endocrine activity.
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Affiliation(s)
- M Sue Marty
- The Dow Chemical Company, Toxicology & Environmental Research and Consulting, 1803 Building, Midland, MI, 48674, USA.
| | - Chris Borgert
- Applied Pharmacology and Toxicology, Inc., C.E.H.T. Dept. Physiological Sciences, University of FL College of Veterinary Medicine, 2250 NW 24th Avenue, Gainesville, FL, 32605, USA.
| | - Katie Coady
- The Dow Chemical Company, Toxicology & Environmental Research and Consulting, 1803 Building, Midland, MI, 48674, USA.
| | - Richard Green
- Dow AgroSciences, 3b Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom.
| | - Steven L Levine
- Monsanto Company, Global Regulatory Science, 700 Chesterfield Parkway W, Chesterfield, MO, 63017, USA.
| | - Ellen Mihaich
- Environmental and Regulatory Resources, LLC, 6807 Lipscomb Drive, Durham, NC, 27712, USA.
| | - Lisa Ortego
- Bayer CropScience, 2 TW Alexander Dr, Research Triangle Park, NC, 27709, USA.
| | - James R Wheeler
- Dow AgroSciences, 3b Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom.
| | - Kun Don Yi
- Syngenta Crop Protection, LLC, 410 S Wing Rd, Greensboro, NC, 27409, USA.
| | - Leah M Zorrilla
- Bayer CropScience, 2 TW Alexander Dr, Research Triangle Park, NC, 27709, USA.
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Vakili M, Rafatullah M, Salamatinia B, Ibrahim MH, Ismail N, Abdullah AZ. Adsorption Studies of Methyl Tert-butyl Ether from Environment. SEPARATION AND PURIFICATION REVIEWS 2016. [DOI: 10.1080/15422119.2016.1270966] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Mohammadtaghi Vakili
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, POPs Research Center, Tsinghua University, Beijing, China
| | - Mohd Rafatullah
- School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia
| | - Babak Salamatinia
- School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor, Malaysia
| | | | - Norli Ismail
- School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia
| | - Ahmad Zuhairi Abdullah
- School of Chemical Engineering, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia
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Badr AA, Saadat I, Saadat M. Study of liver function and expression of some detoxification genes in the male rats exposed to methyl-tertiary butyl ether. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2016. [DOI: 10.1016/j.ejmhg.2015.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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Mihaich E, Erler S, Le Blanc G, Gallagher S. Short-term fish reproduction assays with methyl tertiary butyl ether with zebrafish and fathead minnow: Implications for evaluation of potential for endocrine activity. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:2013-2022. [PMID: 25866897 DOI: 10.1002/etc.3017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 12/19/2014] [Accepted: 04/09/2015] [Indexed: 06/04/2023]
Abstract
The authors report on short-term fish reproduction assays in zebrafish and fathead minnow conducted to examine the potential for methyl tertiary butyl ether (MTBE) to cause effects on the endocrine system. Both studies were performed under good laboratory practice and in accordance with Organisation for Economic Co-operation and Development and US Environmental Protection Agency test guidelines. The results of the first study demonstrated that exposure to a high test concentration (147 mg/L) of MTBE impaired reproductive output of female zebrafish, evident by a reduction in fecundity. Based on the endpoints evaluated in the present study however, there was no supporting evidence to indicate that this effect was caused by disruption of or interaction with the endocrine system. In the second study, fathead minnows exposed to a wider but lower range of test concentrations showed no effects on any reproductive parameter of male or female fish, at the maximum recommended testing concentration of 100 mg/L (62 mg/L measured). The results of these 2 guideline studies indicate that MTBE does not interact with the hypothalamic-pituitary-gonadal axis of zebrafish or fathead minnow.
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Affiliation(s)
- Ellen Mihaich
- Environmental and Regulatory Resources, Durham, North Carolina, USA
| | - Steffen Erler
- SABIC, Saudi Basic Industries Corporation, Pittsfield, Massachusettes, USA
| | - Gerald Le Blanc
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
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de Peyster A, Mihaich E. Hypothesis-driven weight of evidence analysis to determine potential endocrine activity of MTBE. Regul Toxicol Pharmacol 2014; 69:348-70. [DOI: 10.1016/j.yrtph.2014.04.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/10/2014] [Accepted: 04/28/2014] [Indexed: 12/16/2022]
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