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Semenova MN, Kuptsova TS, Semenov VV. Toxicity of organic solvents and surfactants to the sea urchin embryos. CHEMOSPHERE 2024; 353:141589. [PMID: 38432465 DOI: 10.1016/j.chemosphere.2024.141589] [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: 01/29/2024] [Revised: 02/25/2024] [Accepted: 02/29/2024] [Indexed: 03/05/2024]
Abstract
A comparative toxicity of widely applied organic solvents (methanol, ethanol, n-propanol, i-propanol, n-butanol, 2-butanol, i-butanol, t-butanol, 3-methoxy-3-methylbutanol-1 (MMB), ethylene glycol, diethylene glycol, 2-methoxyethanol, 2-ethoxyethanol, glycerol, ethyl acetate, acetonitrile, benzene, dioxane, dimethylformamide, dimethylacetamide, dimethylsulfoxide, 2-pyrrolidone, and N-methyl-2-pyrrolidone) and surfactants (PEG 300, PEG 6000, Tween 20, Tween 80, miramistin, and Cremophor EL) was studied using a sea urchin embryo model. Sea urchin embryo morphological alterations caused by the tested chemicals were described. The tested molecules affected P. lividus embryo development in a concentration-dependent manner. The observed phenotypic anomalies ranged from developmental delay and retardation of plutei growth to formation of aberrant blastules and gastrules, cleavage alteration/arrest, and embryo mortality. Discernible morphological defects were found after embryo exposure with common pharmaceutical ingredients, such as glycerol, Tween 80, and Cremophor EL. In general, solvents were less toxic than surfactants. PEG 6000 PEG 300, DMSO, ethanol, and methanol were identified as the most tolerable compounds with minimum effective concentration (MEC) values of 3.0-7.92 mg/mL. Previously reported MEC value of Pluronic F127 (4.0 mg/mL) fell within the same concentration range. Toxic effects of methanol, ethanol, DMSO, 2-methoxyethanol, 2-ethoxyethanol, Tween 20, and Tween 80 on P. lividus embryos correlated well with their toxicity obtained using other cell and animal models. The sea urchin embryos could be considered as an appropriate test system for toxicity assessment of solvents and surfactants for their further application as solubilizers of hydrophobic molecules in conventional in vitro cell-based assays and in vivo mammalian models. Nevertheless, to avoid adverse effect of a solubilizing agent in ecotoxicological and biological experiments, the preliminary assessment of its toxicity on a chosen test model would be beneficial.
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Affiliation(s)
- Marina N Semenova
- N. K. Koltzov Institute of Developmental Biology, Russian Academy of Sciences, 26 Vavilov Street, 119334, Moscow, Russian Federation.
| | - Tatiana S Kuptsova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation.
| | - Victor V Semenov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation.
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Somade OT, Oyinloye BE, Ajiboye BO, Osukoya OA. Syringic acid demonstrates an anti-inflammatory effect via modulation of the NF-κB-iNOS-COX-2 and JAK-STAT signaling pathways in methyl cellosolve-induced hepato-testicular inflammation in rats. Biochem Biophys Rep 2023; 34:101484. [PMID: 37197735 PMCID: PMC10184048 DOI: 10.1016/j.bbrep.2023.101484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/27/2023] [Accepted: 05/02/2023] [Indexed: 05/19/2023] Open
Abstract
Syringic acid (SACI) is an emerging nutraceutical and antioxidant used in modern Chinese medicine. It has potential neuroprotective, anti-hyperglycemic, and anti-angiogenic properties. Methyl cellosolve (MCEL) has been reported to induce tissue inflammation in the testis, kidney, liver, and lung. This study aimed to investigate the effect and probable mechanism of action of SACI on MCEL-induced hepatic and testicular inflammation in male rats. Compared to the control group, administration of MCEL to rats significantly increased the levels of IL-6, TNF-α, iNOS, COX-2, and NF-κB in the liver and testis. Additionally, the total mRNA expressions of JAK1 (in the liver only), STAT1, and SOCS1 were significantly increased in both the liver and testis, while testicular JAK1 total mRNA levels were significantly decreased. The expression of PIAS1 protein was significantly higher in the liver and testis. Treatments with SACI at 25 (except liver iNOS), 50, and 75 mg/kg significantly decreased the levels of IL-6, TNF-α, iNOS, COX-2, and NF-κB compared to the control group. Furthermore, the total mRNA expressions of JAK1 and SOCS1 in the liver were significantly reduced by all doses of SACI investigated, while the total mRNA levels of liver and testis STAT1 were significantly reduced by 25 and 50 mg/kg of SACI only. In the testis, the mRNA level of SOCS1 was significantly reduced by all doses of SACI compared to MCEL only. Additionally, SACI (at 75 mg/kg) significantly reduced PIAS1 protein expression in the liver, while in the testis, SACI at all investigated doses significantly reduced the expression of PIAS1. In conclusion, SACI demonstrated a hepatic and testicular anti-inflammatory effect by inhibiting the MCEL-induced activation of the NF-κB and JAK-STAT signaling pathways in rats.
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Affiliation(s)
- Oluwatobi T. Somade
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria
- Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria
- Corresponding author. Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria.
| | - Babatunji E. Oyinloye
- Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria
- Institute of Drug Research and Development, S.E Bogoro Center, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria
- Biotechnology and Structural Biology (BSB) Group, Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, 3886, South Africa
| | - Basiru O. Ajiboye
- Institute of Drug Research and Development, S.E Bogoro Center, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria
- Phytomedicine and Molecular Toxicology Research Laboratory, Department of Biochemistry, Federal University Oye Ekiti, Oye, Ekiti State, Nigeria
| | - Olukemi A. Osukoya
- Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria
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Kelsey JR, Seidel S. Propylene oxide derived glycol ethers: A review of the alkyl glycol ethers potential to cause endocrine disruption. Regul Toxicol Pharmacol 2023:105442. [PMID: 37394030 DOI: 10.1016/j.yrtph.2023.105442] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/12/2023] [Accepted: 06/29/2023] [Indexed: 07/04/2023]
Abstract
The 'propylene glycol ethers' (PGEs) are a group of chemical solvents and functional fluids produced through the reaction of propylene oxide (PO) and a monoalcohol. PGEs form different structural isomers, with possible permutations increasing with the number of PO units in the molecule. The dominant isomers have only secondary hydroxyl groups and are not able to be metabolized to the acid structures that are associated with reproductive toxicity. There have been published claims that glycol ethers are human endocrine disruptors. This review systematically evaluates all the available and relevant in vitro and in vivo data across the propylene glycol ether family of substances using an approach based around the EFSA/ECHA 2018 guidance for the identification of endocrine disruptors. The conclusion reached is that there is no evidence to show that PGEs target any endocrine organs or perturb endocrine pathways.
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Affiliation(s)
| | - Shawn Seidel
- Toxicology and Environmental Research & Consulting, The Dow Chemical Company, 1803 Building, Midland, MI, 48674, USA
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4
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Somade OT, Oyinloye BE, Ajiboye BO, Osukoya OA, Adeyi OE. Effect of syringic acid on steroid and gonadotropic hormones, hematological indices, sperm characteristics and morphologies, and markers of tissue damage in methyl cellosolve-administered rats. Biochem Biophys Rep 2022; 32:101360. [PMID: 36237443 PMCID: PMC9550613 DOI: 10.1016/j.bbrep.2022.101360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022] Open
Abstract
Methyl cellosolve (MTC) is an established gonadotoxic and hematotoxic compound that is commonly and universally utilized in herbicide, liquid soap, stain, dye, paint, and brake fluid manufacturing industries as a solvent. Due to its wide range usage, this study therefore investigated the effect of syringic acid (SYAC) on hematological indices, sperm characteristics and morphologies, and markers of tissue damage in MTC administered male Wistar rats. Thirty (30) rats divided into six groups were used. Rats in group 1 served as control, those in group 2 were administered MTC for 30 consecutive days, those in groups 3, 4, and 5 were treated with 25, 50, and 75 mg/kg body weight of SYAC respectively also for 30 consecutive days immediately after each day MTC administrations, while rats in group 6 received 75 mg/kg body weight of SYAC only throughout. Compared with control, administrations of MTC resulted in a significant decrease in spermatozoa count, number of normal and live spermatozoa, Hb count, MCH, MCHC, serum TC, and LH, while number of abnormal spermatozoa, RBC and WBC counts, activities of serum AST, ALT, GGT, LDH, and ADH were significantly increased. Treatments with 25 mg/kg of SYAC significantly reduced the RBC and WBC counts, serum activities of AST, ALT, GGT, and increased TC concentration. Treatments with 50 mg/kg SYAC significantly lowered the number of abnormal spermatozoa, RBC count, activities of serum ALT, AST, LDH, ADH, and increased the number of normal spermatozoa, MCV, MCH, and MCHC, while 75 mg/kg of SYAC significantly decreased the serum activities of AST, ALT, GGT, LDH, ADH, and increased serum TC concentration. Findings from this study have revealed the hepatoprotective effect of SYAC at all doses investigated but did not confer spermatoprotection and hematoprotection against MTC-induced toxicities, and looking at the 3 doses investigated, 50 mg/kg of SYAC yielded the best effect. MTC significantly decreased live sperm, sperm count, MCH, MCHC, and Hb counts. MTC significantly increased number of abnormal sperm, RBC and WBC counts. MTC significantly increased serum activities of AST, ALT, GGT, LDH, and ADH. SYAC significantly decreased RBC and WBC counts, AST, ALT, GGT, LDH, and ADH. SYAC significantly increased number of normal sperm, MCV, MCH, and MCHC counts.
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Affiliation(s)
- Oluwatobi T. Somade
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria,Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria,Corresponding author. Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria.
| | - Babatunji E. Oyinloye
- Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria,Institute of Drug Research and Development, S.E Bogoro Center, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria,Biotechnology and Structural Biology (BSB) Group, Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, 3886, South Africa
| | - Bashiru O. Ajiboye
- Institute of Drug Research and Development, S.E Bogoro Center, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria,Phytomedicine and Molecular Toxicology Research Laboratory, Department of Biochemistry, Federal University Oye Ekiti, Oye, Ekiti State, Nigeria
| | - Olukemi A. Osukoya
- Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, PMB 5454, Ado-Ekiti, 360001, Nigeria
| | - Olubisi E. Adeyi
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria
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Borgatta M, Hechon J, Wild P, Hopf NB. Influence of collection and storage materials on glycol ether concentrations in urine and blood. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 792:148196. [PMID: 34153747 DOI: 10.1016/j.scitotenv.2021.148196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 05/11/2021] [Accepted: 05/28/2021] [Indexed: 06/13/2023]
Abstract
Glycol ethers, such as propylene glycol monomethyl ether (PGME) and propylene glycol monobuthyl ether (PGBE) are solvents found in many professional and domestic products. In biomonitoring studies, the type of materials used to collect, store, and transport these samples can greatly influence the analytical results because materials can adsorb the analyte. Plastic tubes generally have a hydrophobic internal surface that can reduce the concentration of certain chemicals and result in an underestimation of workers' exposures. The aim of this study was to assess whether the storage of PGME and PGBE spiked blood and urine samples led to different PGME and PGBE concentrations in vials made of glass and common plastics (polypropylene (PP), polyethylene (PE) or polystyrene (PS)). Glycol ether concentrations were quantified with headspace gas chromatography equipped with a flame ionization detector. Our results show stable urinary PGME and PGBE concentrations in PP, while up to 15% variations in urinary PGME for PE and PS. For PGME and PGBE in blood, we observed no statistically significant losses in glass, while losses were recorded for all types of plastic tested (PS, PP and PE). We conclude that biomonitoring samples should be collected in glass for blood and PP for urine.
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Affiliation(s)
- Myriam Borgatta
- Center for Primary Care and Public Health (Unisanté), Department of occupational and environmental health (DSTE), University of Lausanne, CH-1011 Lausanne, Switzerland.
| | - Julie Hechon
- Institute for Work and Health (IST), Switzerland
| | - Pascal Wild
- Center for Primary Care and Public Health (Unisanté), Department of occupational and environmental health (DSTE), University of Lausanne, CH-1011 Lausanne, Switzerland; Institute for Research and Safety (INRS), Vandoeuvre les Nancy, France.
| | - Nancy B Hopf
- Center for Primary Care and Public Health (Unisanté), Department of occupational and environmental health (DSTE), University of Lausanne, CH-1011 Lausanne, Switzerland.
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Shi X, Miao Y, Zhang K, Gong S, Xiong B. Ethylene glycol butyl ether deteriorates oocyte quality via impairing mitochondrial function. FASEB J 2021; 35:e21280. [PMID: 33710673 DOI: 10.1096/fj.202002157r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/18/2020] [Accepted: 12/01/2020] [Indexed: 12/13/2022]
Abstract
Ethylene glycol butyl ether (EGBE) is a ubiquitous environmental pollutant that is commonly used in maquillage, industrial, and household products. EGBE has been shown to cause blood toxicity, carcinogenicity, and organ malformations. However, little is known about the impact of EGBE on the female reproductive system, especially oocyte quality. Here, we reported that EGBE influenced oocyte quality by showing the disturbed oocyte meiotic capacity, fertilization potential, and early embryonic development competency. Specifically, EGBE exposure impaired spindle/chromosome structure, microtubule stability, and actin polymerization to result in the oocyte maturation arrest and aneuploidy. In addition, EGBE exposure compromised the dynamics of cortical granules and their component ovastacin, leading to the failure of sperm binding and fertilization. Last, single-cell transcriptome analysis revealed that EGBE-induced oocyte deterioration was caused by mitochondrial dysfunction, which led to the accumulation of ROS and occurrence of apoptosis. Altogether, our study illustrates that mitochondrial dysfunction and redox perturbation is the major cause of the poor quality of oocytes exposed to EGBE.
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Affiliation(s)
- Xiaoyan Shi
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yilong Miao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Kemei Zhang
- Reproductive Medicine Center, Ningbo First Hospital, Ningbo, China
| | - Shuai Gong
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Bo Xiong
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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7
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Miao Y, Li X, Shi X, Gao Q, Chen J, Wang R, Fan Y, Xiong B. Nicotinamide Mononucleotide Restores the Meiotic Competency of Porcine Oocytes Exposed to Ethylene Glycol Butyl Ether. Front Cell Dev Biol 2021; 9:628580. [PMID: 33604339 PMCID: PMC7884640 DOI: 10.3389/fcell.2021.628580] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 01/18/2021] [Indexed: 12/30/2022] Open
Abstract
Ethylene glycol butyl ether (EGBE), a type of glycol ethers, is a common chemical used in both industrial and household products. Increasing animal studies have indicated that it produces reproductive problems, such as testicular damage, reduced female fertility, death of embryos, and birth defects. However, how it influences the female germ cells has not yet determined. Here, we found that EGBE exposure resulted in the defective porcine oocyte maturation via disruption of cytoskeleton dynamics, showing the abnormal spindle assembly, chromosome alignment, and actin organization. Meanwhile, EGBE exposure perturbed the mitochondrial distribution and function, leading to the accumulation of reactive oxygen species (ROS) and generation of DNA damage and apoptosis. Of note, nicotinamide mononucleotide (NMN) supplementation rescued the meiotic defects caused by EGBE exposure via restoring NAD+ level and mitochondrial function and thus eliminating the excessive ROS. Taken together, our observations illustrate that NMN supplementation is an effective strategy to protect oocyte quality against environmental pollutant-induced deterioration, contributing to improve the animal and human fertility.
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Affiliation(s)
- Yilong Miao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Xinyu Li
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiaoyan Shi
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Qian Gao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Jingyue Chen
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Rui Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yong Fan
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Bo Xiong
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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Somade OT, Ajayi BO, Olunaike OE, Jimoh LA. Hepatic oxidative stress, up-regulation of pro-inflammatory cytokines, apoptotic and oncogenic markers following 2-methoxyethanol administrations in rats. Biochem Biophys Rep 2020; 24:100806. [PMID: 32913901 PMCID: PMC7472863 DOI: 10.1016/j.bbrep.2020.100806] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 08/18/2020] [Accepted: 08/18/2020] [Indexed: 01/29/2023] Open
Abstract
2-methoxyethanol (2-ME) is an organic solvent widely used in the manufacture of brake fluids, paints, resins, varnish, nail polish, acetate cellulose, wood coloring, and as a plasticizer in plastics manufacturing. We therefore, investigated its effect on the liver, in a time-course study in male Wistar rats. Animals were orally administered 50 mg/kg body weight of 2-ME for a period of 7, 14, and 21 days. Following 7 days of administration of 2-ME, there was a significant increase in the level of Bax, c-Myc, K-Ras, TNF-α, IL-1β, IL-6, MDA and GPx activity, while the levels of Bcl-2, NO and GSH were significantly reduced compared with control. At the end of 14 days exposure, Bcl-2, and GSH levels, as well as GST activity, were significantly decreased, while levels of Bax, c-Myc, K-Ras, caspase-3, TNF-α, IL-1β, IL-6, MDA and NO were significantly increased compared with control. After 21 days of 2-ME administration, Bcl-2, IL-10, and GSH levels, as well as SOD and GST activities, were significantly decreased, while levels of Bax, c-Myc, K-Ras, caspase-3, p53, TNF-α, IL-1β, IL-6, MDA and NO were significantly increased compared with control. Lastly, liver histopathology confirmed and corroborated the biochemical findings reported above. We therefore, advised that exposures to 2-ME should be strictly avoided as it could trigger hepatic damage through the disorganization of the antioxidant system, up-regulation of inflammatory, apoptotic, and oncogenic markers in rats.
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Key Words
- 2-methoxyethanol
- Apoptosis
- Bax, Bcl-2 associated X
- Bcl-2, B-cell lymphoma 2
- CAT, catalase
- GPx, glutathione peroxidase
- GSH, reduced glutathione
- GST, glutathione S-transferase
- IL-10, interleukin 10
- IL-1β, interleukin-1 beta
- IL-6, interleukin-6
- Inflammation
- K-Ras, Kirsten rat sarcoma viral oncogene
- Liver
- MDA, malondialdehyde
- NO, nitric oxide
- Oncogenes
- Oxidative stress
- SOD, superoxide dismutase
- TNF-α, tumor necrosis factor alpha
- c-Myc, myelocytomatosis
- p53, tumor suppressor protein
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Affiliation(s)
- Oluwatobi T. Somade
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria
| | - Babajide O. Ajayi
- Department of Chemical Sciences, Faculty of Natural Sciences, Ajayi Crowther University, Oyo, Nigeria
| | - Oyinkansola E. Olunaike
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria
| | - Latifah A. Jimoh
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria
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Somade OT, Ajayi BO, Olushola MO, Omoseebi EO. Methyl cellosolve-induced renal oxidative stress and time-dependent up-regulation of pro-inflammatory cytokines, apoptotic, and oncogenic markers in rats. Toxicol Rep 2020; 7:779-787. [PMID: 32642444 PMCID: PMC7332505 DOI: 10.1016/j.toxrep.2020.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 06/16/2020] [Accepted: 06/19/2020] [Indexed: 01/10/2023] Open
Abstract
MC significantly increased and decrease the kidney levels of MDA and NO respectively after 14 and 21 days. MC administration resulted in the disorganization of the renal redox system. MC significantly increased the kidney levels of TNF-α and IL-6 after 7, 14 and 21 days, and IL-1β after 14 and 21 days. MC significantly increased kidney p53, Bax, and caspase-3 after 14 and 21 days, and decreased Bcl-2 after 14 and 21 days. MC significantly increased the kidney levels of c-Myc and K-Ras after 7, 14 and 21 days.
Methyl cellosolve (MC) is used in production of textile, paints, stains, inks, surface coatings, and anti-icing additive in hydraulic fluids and jet fuel. Consequently, the present study investigated its effect on renal cells, in a time-course study in male Wistar rats. Animals were orally administered 50 mg/kg body weight of MC for a period of 7, 14, and 21 days. Following 7 days of administration of MC, there was a significant increase in the levels of K-Ras, c-Myc, TNF-α, IL-6 and NO, while GSH level and SOD activity were significantly reduced compared with control. At the end of 14 days exposure, RKW, GSH, NO, and Bcl-2 levels were significantly decreased, while levels of K-Ras, c-Myc, p53, Bax, caspase-3, TNF-α, IL-1β, IL-6, MDA and GPx activity were significantly increased compared with control. After 21 days of MC administration, RKW, GSH, NO, IL-10 and Bcl-2 levels were significantly decreased, while levels of K-Ras, c-Myc, p53, Bax, caspase-3, TNF-α, IL-1β, IL-6, MDA and GST activity were significantly increased compared with control. Exposures to MC in any way should be strictly avoided as it could trigger renal damage through the disorganization of the antioxidant system, up-regulation of inflammatory, apoptotic, and oncogenic markers in rats.
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Key Words
- Apoptosis
- Bax, Bcl-2 associated X
- Bcl-2, B-cell lymphoma 2
- CAT, catalase
- GPx, glutathione peroxidase
- GSH, reduced glutathione
- GST, glutathione S-transferase
- Histopathology
- IL-1β, interleukin-1 beta
- IL-6, interleukin-6
- Inflammation
- K-Ras, Kirsten rat sarcoma viral oncogene
- Kidney
- MDA, malondialdehyde
- Methyl cellosolve
- NO, nitric oxide
- Oncogenes
- Oxidative stress
- RKW, relative kidney weight
- SOD, superoxide dismutase
- TNF-α, tumor necrosis factor alpha
- c-Myc, myelocytomatosis
- p53, tumor suppressor protein
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Affiliation(s)
- Oluwatobi T Somade
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria
| | - Babajide O Ajayi
- Department of Chemical Sciences, Faculty of Natural Sciences, Ajayi Crowther University, Oyo, Nigeria
| | - Mariana O Olushola
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria
| | - Esther O Omoseebi
- Department of Biochemistry, College of Biosciences, Federal University of Agriculture, Abeokuta, Nigeria
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10
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Stermer AR, Reyes G, Hall SJ, Boekelheide K. Small RNAs in Rat Sperm Are a Predictive and Sensitive Biomarker of Exposure to the Testicular Toxicant Ethylene Glycol Monomethyl Ether. Toxicol Sci 2020; 169:399-408. [PMID: 30768127 DOI: 10.1093/toxsci/kfz041] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Testicular histology and semen parameters are considered the gold standards when determining male reproductive toxicity. Ethylene glycol monomethyl ether (EGME) is a testicular toxicant with well-described effects on histopathology and sperm parameters. To compare the predictivity and sensitivity of molecular biomarkers of testicular toxicity to the traditional endpoints, small RNAs in the sperm were analyzed by next generation RNA-sequencing (RNA-seq). Adult rats were exposed to 0, 50, 60, or 75 mg/kg EGME by oral gavage for 5 consecutive days. Testis histology, epididymal sperm motility, and sperm small RNAs, including microRNAs (miRNAs), mRNA fragments, piwi-interacting RNAs (piRNAs), and tRNA fragments (tRFs), were analyzed 5 weeks after cessation of exposure. Testicular histology showed a significant dose-dependent increase in retained spermatid heads (RSH), while sperm motility declined with increasing dose. RNA-sequencing of sperm small RNAs was used to identify significant dose-dependent changes in percent mRNA fragments (of total reads), percent miRNAs (of total reads), average tRF length, average piRNA length, and piRNA and tRF length-distributions. Discriminant analysis showed relatively low predictivity of exposure based on RSH or motility compared to the average read length of all assigned RNAs. Benchmark dose (BMD) modeling resulted in a BMD of 62 mg/kg using RSH, whereas average read length of all assigned RNAs resulted in a BMD of 47 mg/kg. These results showed that sperm small RNAs are sensitive and predictive biomarkers of EGME-induced male reproductive toxicity.
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Affiliation(s)
- Angela R Stermer
- Department of pathology and laboratory medicine, Brown University, Providence, Rhode Island 02912
| | - Gerardo Reyes
- Department of pathology and laboratory medicine, Brown University, Providence, Rhode Island 02912
| | - Susan J Hall
- Department of pathology and laboratory medicine, Brown University, Providence, Rhode Island 02912
| | - Kim Boekelheide
- Department of pathology and laboratory medicine, Brown University, Providence, Rhode Island 02912
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11
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The urinary metabolic profile of diethylene glycol methyl ether and triethylene glycol methyl ether in Sprague-Dawley rats and the role of the metabolite methoxyacetic acid in their toxicity. Regul Toxicol Pharmacol 2019; 110:104512. [PMID: 31704259 DOI: 10.1016/j.yrtph.2019.104512] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 09/25/2019] [Accepted: 10/30/2019] [Indexed: 11/20/2022]
Abstract
Ethylene glycol ethers are a well-known series of solvents and hydraulic fluids derived from the reaction of ethylene oxide and monoalcohols. Use of methanol as the alcohol results in a series of mono, di and triethylene glycol methyl ethers. The first in the series, monoethylene glycol methyl ether (EGME or 2-methoxyethanol) is well characterised and metabolises in vivo to methoxyacetic acid (MAA), a known reproductive toxicant. Metabolism data is not available for the di and triethylene glycol ethers (DEGME and TEGME respectively). This study evaluated the metabolism of these two substances in male rats following single oral gavage doses of 500, 1000 and 2000 mg/kg for DEGME and 1000 mg/kg for TEGME. As for EGME, the dominant metabolite of each was the acid metabolite derived by oxidation of the terminal hydroxyl group. Elimination of these metabolites was rapid, with half-lives <4 h for each one. Both substances were also found to produce small amounts of MAA (~0.5% for TEGME and ~1.1% for DEGME at doses of 1000 mg/kg) through cleavage of the ether groups in the molecules. These small amounts of MAA produced can explain the effects seen at high doses in reproductive studies using DEGME and TEGME.
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12
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Ernawati, I'tishom R, Sudjarwo SA. The signal transduction of xanthone as a protector on 2-methoxyethanol-induced cardiac cell damage in mice. J Adv Pharm Technol Res 2019; 10:184-189. [PMID: 31742119 PMCID: PMC6843999 DOI: 10.4103/japtr.japtr_57_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
This research aims at investigating the role of antioxidant of xanthone on 2-methoxyethanol (2-ME)-induced cardiac cell damage in mice. Forty mice were grouped into: (1) The control group (mice were given with distilled water), (2) the ME group (mice were given with 2-ME 200 mg/kg BW orally), and (3) the treatment group (mice were given of xanthone with doses 60 mg, 120 mg, 240 mg/kg BW orally and were also given 2-ME 200 mg/kg BW). Their blood samples were taken to measure the level of lactate dehydrogenase (LDH) and creatinine kinase-MB (CK-MB). Heart tissues were also taken to determine the malondialdehyde (MDA), histological findings of heart damage, and the immunohistochemical of the expression of superoxide dismutase (SOD) and glutathione peroxidase (GPx). The administration of 2-ME resulted in a significant increase level of the LDH, CK-MB, MDA, and a decrease in SOD and GPx expression were compared with the control group. The 2-ME also induced loss of the normal structure of heart cells and necrosis. However, treatment with the xanthone, only dose 240 mg/kg BW significantly decrease the level of LDH, CK-MB, MDA, and increase SOD, GPx expression. The xanthone 240 mg/kg BW also demonstrated significantly improved heart cell damage. From the results, it is concluded that the xanthone are a potent antioxidant in against 2-ME-induced cardiac toxicity in mice, through increasing SOD and GPx expression, and also inhibiting LDH, CK-MB and MDA.
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Affiliation(s)
- Ernawati
- Program Study of Doctoral Degree in Medical Science, Faculty of Medicine, Airlangga University, Surabaya, Indonesia
| | - Reny I'tishom
- Department of Medical Biology, Faculty of Medicine, Airlangga University, Surabaya, Indonesia
| | - Sri Ahus Sudjarwo
- Department of Pharmacology, Faculty of Veterinary Medicine, Airlangga University, Surabaya, Indonesia
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13
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New HBM values for emerging substances, inventory of reference and HBM values in force, and working principles of the German Human Biomonitoring Commission. Int J Hyg Environ Health 2017; 220:152-166. [DOI: 10.1016/j.ijheh.2016.09.007] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 09/13/2016] [Indexed: 01/09/2023]
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14
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Gadekar-Shinde S, Reddy B, Khan M, Chavan S, Saini D, Mahajani S. Reactive Distillation for the Production of Methoxy Propyl Acetate: Experiments and Simulation. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b03489] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shambala Gadekar-Shinde
- Sinhgad College of Engineering, Pune, 411041, India
- Chemical
Engineering Department, Bharati Vidyapeeth University College of Engineering (BVUCOE), Pune, 411043, India
- Savitribai Phule Pune University (SPPU), Pune, 411007, India
| | - Bhoja Reddy
- Department
of Chemical Engineering, Indian Institute of Technology, Bombay, Powai,
Mumbai, 400076, India
| | - Mohammad Khan
- Department
of Chemical Engineering, Indian Institute of Technology, Bombay, Powai,
Mumbai, 400076, India
| | - Sanjay Chavan
- Sinhgad College of Engineering, Pune, 411041, India
- Savitribai Phule Pune University (SPPU), Pune, 411007, India
| | - Daulat Saini
- National Chemical Laboratory, Pune, 411008, India
| | - Sanjay Mahajani
- Department
of Chemical Engineering, Indian Institute of Technology, Bombay, Powai,
Mumbai, 400076, India
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15
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Indoor air guide values for glycol ethers and glycol esters—A category approach. Int J Hyg Environ Health 2016; 219:419-36. [DOI: 10.1016/j.ijheh.2016.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 04/13/2016] [Accepted: 04/13/2016] [Indexed: 11/22/2022]
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16
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Colaianna M, Ilmjärv S, Peterson H, Kern I, Julien S, Baquié M, Pallocca G, Bosgra S, Sachinidis A, Hengstler JG, Leist M, Krause KH. Fingerprinting of neurotoxic compounds using a mouse embryonic stem cell dual luminescence reporter assay. Arch Toxicol 2016; 91:365-391. [PMID: 27015953 PMCID: PMC5225183 DOI: 10.1007/s00204-016-1690-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 03/10/2016] [Indexed: 02/05/2023]
Abstract
Identification of neurotoxic drugs and environmental chemicals is an important challenge. However, only few tools to address this topic are available. The aim of this study was to develop a neurotoxicity/developmental neurotoxicity (DNT) test system, using the pluripotent mouse embryonic stem cell line CGR8 (ESCs). The test system uses ESCs at two differentiation stages: undifferentiated ESCs and ESC-derived neurons. Under each condition, concentration–response curves were obtained for three parameters: activity of the tubulin alpha 1 promoter (typically activated in early neurons), activity of the elongation factor 1 alpha promoter (active in all cells), and total DNA content (proportional to the number of surviving cells). We tested 37 compounds from the ESNATS test battery, which includes polypeptide hormones, environmental pollutants (including methylmercury), and clinically used drugs (including valproic acid and tyrosine kinase inhibitors). Different classes of compounds showed distinct concentration–response profiles. Plotting of the lowest observed adverse effect concentrations (LOAEL) of the neuronal promoter activity against the general promoter activity or against cytotoxicity, allowed the differentiation between neurotoxic/DNT substances and non-neurotoxic controls. Reporter activity responses in neurons were more susceptible to neurotoxic compounds than the reporter activities in ESCs from which they were derived. To relate the effective/toxic concentrations found in our study to relevant in vivo concentrations, we used a reverse pharmacokinetic modeling approach for three exemplary compounds (teriflunomide, geldanamycin, abiraterone). The dual luminescence reporter assay described in this study allows high-throughput, and should be particularly useful for the prioritization of the neurotoxic potential of a large number of compounds.
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Affiliation(s)
- Marilena Colaianna
- Department of Pathology and Immunology, Medical School, University of Geneva, Geneva, Switzerland
| | - Sten Ilmjärv
- Department of Pathology and Immunology, Medical School, University of Geneva, Geneva, Switzerland
| | | | - Ilse Kern
- Department of Pediatrics, Geneva University Hospital, Geneva, Switzerland.,Department of Genetic and Laboratory Medicine, Geneva University Hospital, Centre Medical Universitaire, Rue Michel-Servet, 1211, Geneva 4, Switzerland
| | - Stephanie Julien
- Department of Pathology and Immunology, Medical School, University of Geneva, Geneva, Switzerland
| | | | - Giorgia Pallocca
- Doerenkamp-Zbinden Chair for In Vitro Toxicology and Biomedicine, University of Konstanz, Constance, Germany
| | - Sieto Bosgra
- TNO, Zeist, The Netherlands.,BioMarin Pharmaceutical Inc., Leiden, The Netherlands
| | - Agapios Sachinidis
- Institute of Neurophysiology and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Jan G Hengstler
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Technical University of Dortmund, Dortmund, Germany
| | - Marcel Leist
- Doerenkamp-Zbinden Chair for In Vitro Toxicology and Biomedicine, University of Konstanz, Constance, Germany
| | - Karl-Heinz Krause
- Department of Pathology and Immunology, Medical School, University of Geneva, Geneva, Switzerland. .,Department of Genetic and Laboratory Medicine, Geneva University Hospital, Centre Medical Universitaire, Rue Michel-Servet, 1211, Geneva 4, Switzerland.
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17
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Taketa Y, Inoue K, Takahashi M, Sakamoto Y, Watanabe G, Taya K, Yoshida M. Effects of sulpiride and ethylene glycol monomethyl ether on endometrial carcinogenicity in Donryu rats. J Appl Toxicol 2015; 36:769-76. [PMID: 26178146 DOI: 10.1002/jat.3206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/13/2015] [Accepted: 06/04/2015] [Indexed: 11/07/2022]
Abstract
Sulpiride and ethylene glycol monomethyl ether (EGME) are known ovarian toxicants that stimulate prolactin (PRL) secretion, resulting in hypertrophy of the corpora lutea and increased progesterone (P4) production. The purpose of the present study was to investigate how the PRL stimulatory agents affected uterine carcinogenesis and to clarify the effects of PRL on endometrial adenocarcinoma progression in rats. Ten-week-old female Donryu rats were treated once with N-ethyl-N'-nitro-N-nitrosoguanidine (20 mg kg(-1) ), followed by treatment with sulpiride (200 ppm) or EGME (1250 ppm) from 11 weeks of age to 12 months of age. Sulpiride treatment inhibited the incidence of uterine adenocarcinoma and precancerous lesions of atypical endometrial hyperplasia, whereas EGME had no effect on uterine carcinogenesis. Sulpiride markedly prevented the onset of persistent estrus throughout the study period, and EGME delayed and inhibited the onset of persistent estrus. Moreover, sulpiride-treated animals showed high PRL and P4 serum levels without changes in the levels of estradiol-17β, low uterine weights and histological luteal cell hypertrophy. EGME did not affect serum PRL and P4 levels. These results suggest that the prolonged low estradiol-17β to P4 ratio accompanied by persistent estrous cycle abnormalities secondary to the luteal stimulatory effects of PRL may explain the inhibitory effects of sulpiride on uterine carcinogenesis in rats. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- Yoshikazu Taketa
- Division of Pathology, National Institute of Health Sciences, Setagaya-ku, Tokyo, Japan
- Tsukuba Drug Safety, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Tsukuba, Ibaraki, Japan
| | - Kaoru Inoue
- Division of Pathology, National Institute of Health Sciences, Setagaya-ku, Tokyo, Japan
| | - Miwa Takahashi
- Division of Pathology, National Institute of Health Sciences, Setagaya-ku, Tokyo, Japan
| | - Yohei Sakamoto
- Division of Pathology, National Institute of Health Sciences, Setagaya-ku, Tokyo, Japan
| | - Gen Watanabe
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Kazuyoshi Taya
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Midori Yoshida
- Division of Pathology, National Institute of Health Sciences, Setagaya-ku, Tokyo, Japan
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18
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Hložek T, Bursová M, Coufal P, Čabala R. Identification and quantification of acidosis inducing metabolites in cases of alcohols intoxication by GC-MS for emergency toxicology. J Pharm Biomed Anal 2015; 114:16-21. [PMID: 26001161 DOI: 10.1016/j.jpba.2015.04.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 04/23/2015] [Accepted: 04/27/2015] [Indexed: 11/16/2022]
Abstract
A simple, cost effective, and fast gas chromatography method with mass spectrometry detection (GC-MS) for simultaneous measurement of formic acid, glycolic acid, methoxyacetic acid, ethoxyacetic acid and 2-hydroxyethoxyacetic acid in serum and urine was developed and validated. This multi-analyte method is highly suitable for clinical and emergency toxicology laboratory diagnostic, allowing identification and quantification of five most common acidosis inducing organic acids present in cases of alcohol intoxication. Furthermore, when patients are admitted to emergency unit at late stage of toxic alcohol intoxication, the concentration of parent compound may be already low or not detectable. This new method employs a relatively less used class of derivatization agents - alkyl chloroformates, allowing the efficient and rapid derivatization of carboxylic acids within seconds. The entire sample preparation procedure is completed within 5 min. The optimal conditions of derivatization procedure have been found using chemometric approach (design of experiment). The calibration dependence of the method was proved to be quadratic in the range of 25-3000 mg L(-1), with adequate accuracy (97.3-108.0%) and precision (<12.8%). The method was successfully applied for identification and quantification of the selected compounds in serum of patients from emergency units.
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Affiliation(s)
- Tomáš Hložek
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital, 121 08 Prague 2, Czech Republic.
| | - Miroslava Bursová
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital, 121 08 Prague 2, Czech Republic; Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Pavel Coufal
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Radomír Čabala
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital, 121 08 Prague 2, Czech Republic; Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
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19
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Starek-Świechowicz B, Szymczak W, Budziszewska B, Starek A. Testicular effect of a mixture of 2-methoxyethanol and 2-ethoxyethanol in rats. Pharmacol Rep 2014; 67:289-93. [PMID: 25712652 DOI: 10.1016/j.pharep.2014.09.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 09/18/2014] [Accepted: 09/19/2014] [Indexed: 01/14/2023]
Abstract
BACKGROUND 2-Methoxyethanol (ME) and 2-ethoxyethanol (EE) represent a large group of chemicals which are used separately or as mixtures. These compounds exert multidirectional toxic effects. The present studies aimed to demonstrate the effects of ME and EE alone and their mixture on the reproductive organs in the rats. METHODS Male Wistar rats were treated subcutaneously with ME and EE alone (1.25-5.0mM/kg/day) or with their mixture (1:1) for 4 weeks. After completion of the experiment, the testes, epididymides, and prostate were weighed. In post-mitochondrial supernatant of the testes, the level of total protein, non-protein and protein sulfhydryl groups, malondialdehyde, total antioxidant status, and glutathione peroxidase and glutathione reductase activities were determined. RESULTS Exposure to ME alone resulted in a dose-dependent decrease in the organ weights, the total protein, non-protein and protein sulfhydryl groups. EE alone led to less marked alterations. Co-exposure to ME and EE caused alterations similar as in the rats treated with ME alone. CONCLUSIONS Marked testicular atrophy, decrease in epididymis and prostate weights are predominant effects of the repeated exposure to relatively low doses of ME and EE. A decrease in the total protein level, and protein sulfhydryl groups may be responsible for testicular atrophy. A significant depletion of non-protein sulfhydryl groups and occasionally elevated glutathione peroxidase activity may indicate that ME and EE resulted in disturbances of pro-oxidant/antioxidant balance. The study suggests that testicular toxicity in male rats co-exposed to ME and EE is mainly caused by the former compound.
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Affiliation(s)
- Beata Starek-Świechowicz
- Department of Biochemical Toxicology, Chair of Toxicology, Medical College, Jagiellonian University, Kraków, Poland.
| | | | - Bogusława Budziszewska
- Department of Biochemical Toxicology, Chair of Toxicology, Medical College, Jagiellonian University, Kraków, Poland; Department of Experimental Neuroendocrinology, Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Andrzej Starek
- Department of Biochemical Toxicology, Chair of Toxicology, Medical College, Jagiellonian University, Kraków, Poland
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20
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Dayan C, Hales BF. Effects of ethylene glycol monomethyl ether and its metabolite, 2-methoxyacetic acid, on organogenesis stage mouse limbs in vitro. ACTA ACUST UNITED AC 2014; 101:254-61. [PMID: 24798094 PMCID: PMC4227605 DOI: 10.1002/bdrb.21108] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 03/11/2014] [Accepted: 03/12/2014] [Indexed: 02/05/2023]
Abstract
Exposure to ethylene glycol monomethyl ether (EGME), a glycol ether compound found in numerous industrial products, or to its active metabolite, 2-methoxyacetic acid (2-MAA), increases the incidence of developmental defects. Using an in vitro limb bud culture system, we tested the hypothesis that the effects of EGME on limb development are mediated by 2-MAA-induced alterations in acetylation programming. Murine gestation day 12 embryonic forelimbs were exposed to 3, 10, or 30 mM EGME or 2-MAA in culture for 6 days to examine effects on limb morphology; limbs were cultured for 1 to 24 hr to monitor effects on the acetylation of histones (H3K9 and H4K12), a nonhistone protein, p53 (p53K379), and markers for cell cycle arrest (p21) and apoptosis (cleaved caspase-3). EGME had little effect on limb morphology and no significant effects on the acetylation of histones or p53 or on biomarkers for cell cycle arrest or apoptosis. In contrast, 2-MAA exposure resulted in a significant concentration-dependent increase in limb abnormalities. 2-MAA induced the hyperacetylation of histones H3K9Ac and H4K12Ac at all concentrations tested (3, 10, and 30 mM). Exposure to 10 or 30 mM 2-MAA significantly increased acetylation of p53 at K379, p21 expression, and caspase-3 cleavage. Thus, 2-MAA, the proximate metabolite of EGME, disrupts limb development in vitro, modifies acetylation programming, and induces biomarkers of cell cycle arrest and apoptosis
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Affiliation(s)
- Caroline Dayan
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Canada
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21
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Starek-Świechowicz B, Miranowicz-Dzierżawska K, Szymczak W, Budziszewska B, Starek A. Hematological effects of exposure to mixtures of selected ethylene glycol alkyl ethers in rats. Pharmacol Rep 2012; 64:166-78. [PMID: 22580533 DOI: 10.1016/s1734-1140(12)70743-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 09/23/2011] [Indexed: 11/16/2022]
Abstract
Exposure to various ethylene glycol monoalkyl ethers (EGAEs) is known to result in hemolytic effect caused by their metabolites, appropriate alkoxyacetic acids, generated via both alcohol dehydrogenase and aldehyde dehydrogenase. It has been shown in many studies that administration of single doses of EGAEs to rats lead to dose- and time-dependent hemolytic anemia. The repeated exposure to isopropoxyethanol (IPE), and butoxyethanol (BE), contrary to methoxyethanol (ME) and ethoxyethanol (EE), resulted in significantly less pronounced hematological changes. While the majority of hematological effects were dramatic at the beginning of the exposure, later these changes clearly regressed despite continued weekly exposure to these ethers. The gradual recovery from the hemolytic anemia may be associated with tolerance development to the hemolytic effect of IPE and BE. ME demonstrated high hematotoxicity, which increased progressively and reached a maximum at the end of 4 week exposure, whereas EE revealed moderate hematological effects. It might be suspected that ME and EE may modified of IPE hemolytic activity in rats simultaneously treated with these compounds. In the rats co-exposed to IPE and ME subcutaneously at a relatively low doses of 0.75 mM + 0.75 mM for 4 weeks, a significantly less pronounced hematological changes at the beginning of the exposure in comparison with animals treated with IPE (0.75 mM) alone were observed. At the later period, i.e., at the end of 4 weeks exposure, the hematological alterations in the same animals were markedly pronounced and progressively elevated with exposure time, except for mean corpuscular volume (MCV) values, which were significantly lower in comparison with IPE group. ME at the higher dose of 1.25 mM/kg and EE at both doses of 0.75 and 1.25 mM/kg did not modify the hematotoxicity of IPE (at doses of 0.75 mM and 1.25 mM) at the beginning of the exposure, whereas increased its harmful effects at the end of the treatment. The amelioration in the majority of the hematological parameters at the beginning of the exposure may be caused by inhibitory effect of ME on IPE metabolism. On the contrary, an accumulation of the methoxyacetic acid and ethoxyacetic acid, toxic metabolites of ME and EE, respectively, and no tolerance development to the hemolytic effect of these two chemicals may be responsible for elevated hematological alterations at the end of the exposure.
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Affiliation(s)
- Beata Starek-Świechowicz
- Department of Biochemical Toxicology, Medical College, Jagiellonian University, Medyczna 9, PL 30-688 Kraków, Poland
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22
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Taketa Y, Inoue K, Takahashi M, Yamate J, Yoshida M. Differential morphological effects in rat corpora lutea among ethylene glycol monomethyl ether, atrazine, and bromocriptine. Toxicol Pathol 2012; 41:736-43. [PMID: 23076038 DOI: 10.1177/0192623312464305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Ethylene glycol monomethyl ether (EGME) or atrazine induces luteal cell hypertrophy in rats. Our previous study suggested that EGME stimulates both new and old corpora lutea (CL), while atrazine stimulates new CL. Bromocriptine (BRC) is known to suppress the luteolysis in rats. This study investigated the light- and electron-microscopic luteal changes induced by EGME, atrazine, or BRC. Female rats were treated with EGME (300 mg/kg/day), BRC (2 mg/kg/day), EGME and BRC (EGME + BRC), or atrazine (300 mg/kg/day) for 7 days. Luteal cell hypertrophy induced by EGME, EGME + BRC, and atrazine was subclassified into the following two types: CL hypertrophy, vacuolated type (CL-V) characterized by intracytoplasmic fine vacuoles, and CL hypertrophy, eosinophilic type (CL-E) characterized by eosinophilic and abundant cytoplasm. The proportions of CL-V and CL-E were different among the treatments. BRC-treated old CL showed lower proportion of endothelial cells and fibroblasts than normal old CL. Ultrastructural observation revealed that the luteal cells of CL-V contained abundant lipid droplets, whereas those of CL-E in EGME and EGME + BRC groups showed uniformly well-developed smooth endoplasmic reticulum. No clear ultrastructural difference was observed between the control CL and atrazine-treated CL-E. These results indicate that EGME, atrazine, and BRC have differential luteal morphological effects.
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Affiliation(s)
- Yoshikazu Taketa
- Division of Pathology, National Institute of Health Sciences, Tokyo 156-8501, Japan.
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23
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Effects of ethylene glycol ethers on cell viability in the human neuroblastoma SH-SY5Y cell line. Pharmacol Rep 2011; 62:1243-9. [PMID: 21273685 DOI: 10.1016/s1734-1140(10)70389-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Revised: 10/22/2010] [Indexed: 11/21/2022]
Abstract
Ethylene glycol ethers (EGEs) are a class of chemicals used extensively in the manufacture of a wide range of domestic and industrial products, which may result in human exposure and toxicity. Hematologic and reproductive toxicity of EGEs are well known whereas their action on neuronal cell viability has not been studied so far. In the present study, we investigated the effects of some EGEs on cell viability and on the hydrogen peroxide-induced damage in the human neuroblastoma (SH-SY5Y) cells. It has been found that 2-phenoxyethanol in a concentration-dependent manner (5-25 mM, 24 h) increased the basal and H(2)O(2)-induced lactate dehydrogenase (LDH) release and 3-[4,5-dimethylthiazol-2-yl]2,5-diphenyl tetrazolium bromide (MTT) reduction. 2-Butoxyethanol given alone did not affect LDH release and MTT reduction but concentration-dependently enhanced the cytotoxic effect of H(2)O(2). 2-Isopropoxyethanol significantly and concentration-dependently (1-25 mM) increased the basal LDH release and attenuated MTT reduction, but did not potentiate the cytotoxic effect of H(2)O(2). Contrary to this, 2-methoxyethanol did not show a cytotoxic effect while 2-ethoxyethanol at high concentrations intensified the hydrogen peroxide action. This study demonstrated that among the EGEs studied, 2-phenoxyethanol showed the most consistent cytotoxic effect on neurons in in vitro conditions and enhanced the hydrogen peroxide action. 2-Isopropoxyethanol had also a potent cytotoxic effect, but it did not enhance the hydrogen peroxide action, whereas 2-butoxyethanol only potentiated cytotoxic effect of H(2)O(2). It is concluded that the results of the present study should be confirmed in in vivo conditions and that some EGEs, especially 2-phenoxyethanol, 2-butoxyethanol and 2-isopropoxyethanol, may be responsible for initiation or exacerbation of neuronal cell damage.
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24
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Bigot S, Bricout H, Suisse I, Mortreux A, Castanet Y. Synthesis and Surface Properties of Glycerol Based C8 Chain Monoethers. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200778z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandra Bigot
- Université de Lille Nord de France, ENSCL, Unité de Catalyse et Chimie du Solide, UMR 8181, BP 90108, 59652 Villeneuve d'Ascq Cedex, France
| | - Hervé Bricout
- Université de Lille Nord de France, Faculté Jean Perrin, Unité de Catalyse et Chimie du Solide, UMR 8181, Rue Jean Souvraz, SP 18, 62307 Lens Cedex, France
| | - Isabelle Suisse
- Université de Lille Nord de France, ENSCL, Unité de Catalyse et Chimie du Solide, UMR 8181, BP 90108, 59652 Villeneuve d'Ascq Cedex, France
| | - André Mortreux
- Université de Lille Nord de France, ENSCL, Unité de Catalyse et Chimie du Solide, UMR 8181, BP 90108, 59652 Villeneuve d'Ascq Cedex, France
| | - Yves Castanet
- Université de Lille Nord de France, ENSCL, Unité de Catalyse et Chimie du Solide, UMR 8181, BP 90108, 59652 Villeneuve d'Ascq Cedex, France
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Lam CW, Lim SR, Schoenung JM. Environmental and risk screening for prioritizing pollution prevention opportunities in the U.S. printed wiring board manufacturing industry. JOURNAL OF HAZARDOUS MATERIALS 2011; 189:315-322. [PMID: 21398034 DOI: 10.1016/j.jhazmat.2011.02.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 02/12/2011] [Accepted: 02/14/2011] [Indexed: 05/30/2023]
Abstract
Modern manufacturing of printed wiring boards (PWBs) involves extensive use of various hazardous chemicals in different manufacturing steps such as board preparation, circuit design transfer, etching and plating processes. Two complementary environmental screening methods developed by the U.S. EPA, namely: (i) the Tool for the Reduction and Assessment of Chemical and Other Environmental Impacts (TRACI) and (ii) Risk-Screening Environmental Indicators (RSEI), are used to quantify geographic and chemical environmental impacts in the U.S. PWB manufacturing industry based on Toxics Release Inventory (TRI) data. Although the release weight percentages of industrial chemicals such as methanol, glycol ethers and dimethylformamide comprise the larger fraction of reported air and water emissions, results indicate that lead, copper and their compounds' releases correspond to the highest environmental impact from toxicity potentials and risk-screening scores. Combining these results with further knowledge of PWB manufacturing, select alternative chemical processes and materials for pollution prevention are discussed. Examples of effective pollution prevention options in the PWB industry include spent etchant recovery technologies, and process and material substitutions. In addition, geographic assessment of environmental burden highlights states where promotion of pollution prevention strategies and emissions regulations can have the greatest effect to curb the PWB industry's toxic release impacts.
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Affiliation(s)
- Carl W Lam
- Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95616, USA
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Priyandoko D, Ishii T, Kaul SC, Wadhwa R. Ashwagandha leaf derived withanone protects normal human cells against the toxicity of methoxyacetic acid, a major industrial metabolite. PLoS One 2011; 6:e19552. [PMID: 21573189 PMCID: PMC3087802 DOI: 10.1371/journal.pone.0019552] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Accepted: 04/05/2011] [Indexed: 11/29/2022] Open
Abstract
The present day lifestyle heavily depends on industrial chemicals in the form of agriculture, cosmetics, textiles and medical products. Since the toxicity of the industrial chemicals has been a concern to human health, the need for alternative non-toxic natural products or adjuvants that serve as antidotes are in high demand. We have investigated the effects of Ayurvedic herb Ashwagandha (Withania somnifera) leaf extract on methoxyacetic acid (MAA) induced toxicity. MAA is a major metabolite of ester phthalates that are commonly used in industry as gelling, viscosity and stabilizer reagents. We report that the MAA cause premature senescence of normal human cells by mechanisms that involve ROS generation, DNA and mitochondrial damage. Withanone protects cells from MAA-induced toxicity by suppressing the ROS levels, DNA and mitochondrial damage, and induction of cell defense signaling pathways including Nrf2 and proteasomal degradation. These findings warrant further basic and clinical studies that may promote the use of withanone as a health adjuvant in a variety of consumer products where the toxicity has been a concern because of the use of ester phthalates.
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Affiliation(s)
- Didik Priyandoko
- National Institute of Advanced Industrial Science & Technology (AIST), Tsukuba, Ibaraki, Japan
- Graduate School of Life & Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Tetsuro Ishii
- Graduate School of Life & Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Sunil C. Kaul
- National Institute of Advanced Industrial Science & Technology (AIST), Tsukuba, Ibaraki, Japan
- * E-mail: (SCK); (RW)
| | - Renu Wadhwa
- National Institute of Advanced Industrial Science & Technology (AIST), Tsukuba, Ibaraki, Japan
- * E-mail: (SCK); (RW)
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Bagchi G, Zhang Y, Stanley KA, Waxman DJ. Complex modulation of androgen responsive gene expression by methoxyacetic acid. Reprod Biol Endocrinol 2011; 9:42. [PMID: 21453523 PMCID: PMC3083340 DOI: 10.1186/1477-7827-9-42] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Accepted: 03/31/2011] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Optimal androgen signaling is critical for testicular development and spermatogenesis. Methoxyacetic acid (MAA), the primary active metabolite of the industrial chemical ethylene glycol monomethyl ether, disrupts spermatogenesis and causes testicular atrophy. Transcriptional trans-activation studies have indicated that MAA can enhance androgen receptor activity, however, whether MAA actually impacts the expression of androgen-responsive genes in vivo, and which genes might be affected is not known. METHODS A mouse TM3 Leydig cell line that stably expresses androgen receptor (TM3-AR) was prepared and analyzed by transcriptional profiling to identify target gene interactions between MAA and testosterone on a global scale. RESULTS MAA is shown to have widespread effects on androgen-responsive genes, affecting processes ranging from apoptosis to ion transport, cell adhesion, phosphorylation and transcription, with MAA able to enhance, as well as antagonize, androgenic responses. Moreover, testosterone is shown to exert both positive and negative effects on MAA gene responses. Motif analysis indicated that binding sites for FOX, HOX, LEF/TCF, STAT5 and MEF2 family transcription factors are among the most highly enriched in genes regulated by testosterone and MAA. Notably, 65 FOXO targets were repressed by testosterone or showed repression enhanced by MAA with testosterone; these include 16 genes associated with developmental processes, six of which are Hox genes. CONCLUSIONS These findings highlight the complex interactions between testosterone and MAA, and provide insight into the effects of MAA exposure on androgen-dependent processes in a Leydig cell model.
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Affiliation(s)
- Gargi Bagchi
- Division of Cell and Molecular Biology, Department of Biology, Boston University, Boston, MA 02215, USA
| | - Yijing Zhang
- Division of Cell and Molecular Biology, Department of Biology, Boston University, Boston, MA 02215, USA
| | - Kerri A Stanley
- Division of Cell and Molecular Biology, Department of Biology, Boston University, Boston, MA 02215, USA
| | - David J Waxman
- Division of Cell and Molecular Biology, Department of Biology, Boston University, Boston, MA 02215, USA
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Taketa Y, Yoshida M, Inoue K, Takahashi M, Sakamoto Y, Watanabe G, Taya K, Yamate J, Nishikawa A. Differential Stimulation Pathways of Progesterone Secretion from Newly Formed Corpora Lutea in Rats Treated with Ethylene Glycol Monomethyl Ether, Sulpiride, or Atrazine. Toxicol Sci 2011; 121:267-78. [DOI: 10.1093/toxsci/kfr062] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Taketa Y, Inomata A, Hosokawa S, Sonoda J, Hayakawa K, Nakano K, Momozawa Y, Yamate J, Yoshida M, Aoki T, Tsukidate K. Histopathological Characteristics of Luteal Hypertrophy Induced by Ethylene Glycol Monomethyl Ether with a Comparison to Normal Luteal Morphology in Rats. Toxicol Pathol 2010; 39:372-80. [DOI: 10.1177/0192623310388429] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ethylene glycol monomethyl ether (EGME) is a known reproductive toxicant that induces luteal hypertrophy in rat ovaries. In this study, we characterized the histopathological features of corpora lutea (CL) from EGME–treated rats and compared them with normal CL formation and regression. Normally cycling female Sprague-Dawley rats were treated with 5-bromo-2′-deoxyuridine (BrdU) intraperitoneally on the morning of estrus and their ovaries were examined 1 (metestrus), 4 (estrus), 8 (estrus), or 12 (estrus) days later to observe the transition of BrdU-labeled cells within in the CL. CL at each time point of estrus stage were classified into 4 types: Type I (newly formed CL), Type II (mature CL), Type III (regressing CL), and Type IV (residual CL). CL almost fully regressed within 4 estrus cycles. In contrast, in female rats given EGME orally (30, 100, or 300 mg/kg for 2 or 4 weeks), luteal cells were hypertrophic with abundant cytoplasm. Although the size of CL varied, all CL in EGME–treated rats had histological features similar to Type II CL, but they were more hypertrophic with less apoptosis. These results suggest that EGME has a luteal hypertrophic effect on all CL phases, including regression.
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Affiliation(s)
- Yoshikazu Taketa
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Akira Inomata
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
| | - Satoru Hosokawa
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
| | - Jiro Sonoda
- Kawashima, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Gifu, Japan
| | - Kazuhiro Hayakawa
- Kawashima, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Gifu, Japan
| | - Kyoko Nakano
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
| | - Yuki Momozawa
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
| | - Joji Yamate
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Midori Yoshida
- Division of Pathology, National Institute of Health Sciences, Tokyo, Japan
| | - Toyohiko Aoki
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
- Kawashima, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Gifu, Japan
| | - Kazuo Tsukidate
- Tsukuba, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Ibaraki, Japan
- Kawashima, Drug Safety Japan, Global Drug Safety, Biopharmaceutical Assessments Core Function Unit, Eisai Product Creation Systems, Eisai Co., Ltd., Gifu, Japan
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Ellis-Hutchings RG, Carney EW. Whole embryo culture: a “New” technique that enabled decades of mechanistic discoveries. ACTA ACUST UNITED AC 2010; 89:304-12. [DOI: 10.1002/bdrb.20263] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bagchi G, Zhang Y, Waxman DJ. Impact of methoxyacetic acid on mouse Leydig cell gene expression. Reprod Biol Endocrinol 2010; 8:65. [PMID: 20565877 PMCID: PMC2909983 DOI: 10.1186/1477-7827-8-65] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2010] [Accepted: 06/18/2010] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Methoxyacetic acid (MAA) is the active metabolite of the widely used industrial chemical ethylene glycol monomethyl ether, which is associated with various developmental and reproductive toxicities, including neural toxicity, blood and immune disorders, limb degeneration and testicular toxicity. Testicular toxicity is caused by degeneration of germ cells in association with changes in gene expression in both germ cells and Sertoli cells of the testis. This study investigates the impact of MAA on gene expression in testicular Leydig cells, which play a critical role in germ cell survival and male reproductive function. METHODS Cultured mouse TM3 Leydig cells were treated with MAA for 3, 8, and 24 h and changes in gene expression were monitored by genome-wide transcriptional profiling. RESULTS A total of 3,912 MAA-responsive genes were identified. Ingenuity Pathway analysis identified reproductive system disease, inflammatory disease and connective tissue disorder as the top biological functions affected by MAA. The MAA-responsive genes were classified into 1,366 early responders, 1,387 mid-responders, and 1,138 late responders, based on the time required for MAA to elicit a response. Analysis of enriched functional clusters for each subgroup identified 106 MAA early response genes involved in transcription regulation, including 32 genes associated with developmental processes. 60 DNA-binding proteins responded to MAA rapidly but transiently, and may contribute to the downstream effects of MAA seen for many mid and late response genes. Genes within the phosphatidylinositol/phospholipase C/calcium signaling pathway, whose activity is required for potentiation of nuclear receptor signaling by MAA, were also enriched in the set of early MAA response genes. In contrast, many of the genes responding to MAA at later time points encode membrane proteins that contribute to cell adhesion and membrane signaling. CONCLUSIONS These findings on the progressive changes in gene expression induced by MAA in a cultured Leydig cell model may help elucidate signaling pathways that lead to the testicular pathophysiological responses induced by MAA exposure and may identify useful biomarkers of MAA toxicity.
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Affiliation(s)
- Gargi Bagchi
- Division of Cell and Molecular Biology, Department of Biology, Boston University, Boston, MA 02215, USA
| | - Yijing Zhang
- Division of Cell and Molecular Biology, Department of Biology, Boston University, Boston, MA 02215, USA
| | - David J Waxman
- Division of Cell and Molecular Biology, Department of Biology, Boston University, Boston, MA 02215, USA
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Louisse J, Bai Y, Verwei M, de Sandt JJV, Blaauboer BJ, Rietjens IM. Decrease of intracellular pH as possible mechanism of embryotoxicity of glycol ether alkoxyacetic acid metabolites. Toxicol Appl Pharmacol 2010; 245:236-43. [DOI: 10.1016/j.taap.2010.03.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Revised: 02/25/2010] [Accepted: 03/02/2010] [Indexed: 10/19/2022]
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Adedara IA, Farombi EO. Induction of oxidative damage in the testes and spermatozoa and hematotoxicity in rats exposed to multiple doses of ethylene glycol monoethyl ether. Hum Exp Toxicol 2010; 29:801-12. [DOI: 10.1177/0960327109360115] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effects of ethylene glycol monoethyl ether (EGEE) on the antioxidant systems of the testes and epididymal spermatozoa were investigated in rats at dose levels of 0, 100, 200 and 400 mg kg-1 body weight (bw) administered orally by gavage for 14 consecutive days. The bw gain of the EGEE-treated rats decreased significantly at 200 and 400 mg kg- 1 bw compared with the control group. There were no significant changes in the weights of the testes, epididymis, seminal vesicles and prostate glands of the EGEE-treated rats. In the testes, while EGEE treatment resulted in significant decrease in glutathione (GSH) level, superoxide dismutase (SOD) and catalase (CAT) activities, it markedly increased the malondialdehyde (MDA) level, glutathione-S-transferase (GST) and lactate dehydrogenase (LDH) activities at 200 and 400 mg kg-1 dose levels but vitamin C content remained unaffected in all the groups. In the spermatozoa, administration of EGEE caused significant decrease in the activities of CAT, GST and LDH as well as in the levels of vitamin C and GSH but significantly increased the MDA level and SOD activity compared with the control rats. Histopathological examination showed severe degeneration of the testes, such as generalized erosion and necrosis of the germinal epithelium of the testes, but mildly affected the epididymis at 400 mg kg-1 dose only. Data on spermatozoa analysis of EGEE-treated rats revealed significant decrease in the epididymal spermatozoa number, testicular spermatozoa number, daily spermatozoa production and spermatozoa motility but significantly increased the total spermatozoa abnormalities without affecting the spermatozoa live-dead ratio at all dose levels when compared with the control group. Results of haematological examination showed that white blood cells (WBC), platelets neutrophils and mean corpuscular haemoglobin concentration (MCHC) were significantly lower whereas lymphocytes were increased in 200 and 400 mg/kg EGEE-exposed rats than in the controls. EGEE at 100 mg/kg bw produced minor effect on haematological parameters but adversely affected testes and spermatozoa. In summary, short term administration of EGEE is hematotoxic and gonadotoxic and its effects on male reproduction could be due to the induction of oxidative stress in testes and spermatozoa.
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Affiliation(s)
- Isaac A Adedara
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Ebenezer O Farombi
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria,
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Henley DV, Mueller S, Korach KS. The short-chain fatty acid methoxyacetic acid disrupts endogenous estrogen receptor-alpha-mediated signaling. ENVIRONMENTAL HEALTH PERSPECTIVES 2009; 117:1702-6. [PMID: 20049119 PMCID: PMC2801194 DOI: 10.1289/ehp.0900800] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Accepted: 06/16/2009] [Indexed: 05/05/2023]
Abstract
BACKGROUND Ethylene glycol monomethyl ether (EGME) exposure is associated with impaired reproductive function. The primary metabolite of EGME is methoxyacetic acid (MAA), a short-chain fatty acid that inhibits histone deacetylase activity and alters gene expression. OBJECTIVE Because estrogen signaling is necessary for normal reproductive function and modulates gene expression, the estrogen-signaling pathway is a likely target for MAA; however, little is known about the effects of MAA in this regard. METHODS We evaluated the mechanistic effects of MAA on estrogen receptor (ER) expression and estrogen signaling using in vitro and in vivo model systems. RESULTS MAA potentiates 17beta-estradiol (E(2)) stimulation of an estrogen-responsive reporter plasmid in HeLa cells transiently transfected with either a human ERalpha or ERbeta expression vector containing a cytomegalovirus (CMV) promoter. This result is attributed to increased exogenous ER expression due to MAA-mediated activation of the CMV promoter. In contrast to its effects on exogenous ER, MAA decreases endogenous ERalpha expression and attenuates E(2)-stimulated endogenous gene expression in both MCF-7 cells and the mouse uterus. CONCLUSIONS These results illustrate the importance of careful experimental design and analysis when assessing the potential endocrine-disrupting properties of a compound to ensure biological responses are in concordance with in vitro analyses. Given the established role of the ER in normal reproductive function, the effects of MAA on the endogenous ER reported here are consistent with the reproductive abnormalities observed after EGME exposure and suggest that these toxicities may be due, at least in part, to attenuation of endogenous ER-mediated signaling.
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Affiliation(s)
- Derek V. Henley
- Receptor Biology Section, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | - Stephanie Mueller
- German Cancer Research Center, Systems Biology of Signal Transduction, Heidelberg, Germany
| | - Kenneth S. Korach
- Receptor Biology Section, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
- Address correspondence to K.S. Korach, Receptor Biology Section, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, MD B3-02, P.O. Box 12233, Research Triangle Park, NC 27709 USA. Telephone: (919) 541-3512. Fax: (919) 541-0696. E-mail:
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Stefania G, Maura B, Claudia VL, Barbara P, Ginevra M, Francesco R. Biological effects of diethylene glycol (DEG) and produced waters (PWs) released from offshore activities: a multi-biomarker approach with the sea bass Dicentrarchus labrax. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2009; 157:3166-3173. [PMID: 19515471 DOI: 10.1016/j.envpol.2009.05.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Revised: 03/31/2009] [Accepted: 05/06/2009] [Indexed: 05/27/2023]
Abstract
Diethylene glycol (DEG) is largely used during oil and gas exploitation by offshore platforms. The aim of this work was to investigate if this compound induces direct molecular/cellular effects in marine organisms, or indirectly modulate those of produced waters (PWs). Sea bass (Dicentrarchus labrax) were exposed to DEG dosed alone or in combination with PWs from an Adriatic platform. A wide array of analysed biomarkers included cytochrome P450-dependent enzymatic activity, bile metabolites, glutathione S-transferases, acetylcholinesterase, peroxisomal proliferation, antioxidant defences (catalase, glutathione reductase, glutathione peroxidases, glutathione), total oxyradical scavenging capacity, malondialdehyde and DNA integrity (single strand breaks and frequency of micronuclei). Results did not reveal marked effects of DEG, while PWs influenced the biotransformation system, the oxidative status and the onset of genotoxic damages. Co-exposures caused only limited differences of biomarker responses at some experimental conditions, overall suggesting a limited biological impact of DEG at levels normally deriving from offshore activities.
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Affiliation(s)
- Gorbi Stefania
- Dipartimento di Biochimica, Biologia e Genetica, Università Politecnica delle Marche, Ancona, Italy
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Bagchi G, Hurst CH, Waxman DJ. Interactions of methoxyacetic acid with androgen receptor. Toxicol Appl Pharmacol 2008; 238:101-10. [PMID: 18486176 DOI: 10.1016/j.taap.2008.03.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Revised: 02/28/2008] [Accepted: 03/24/2008] [Indexed: 01/11/2023]
Abstract
Endocrine disruptive compounds (EDC) alter hormone-stimulated, nuclear receptor-dependent physiological and developmental processes by a variety of mechanisms. One recently identified mode of endocrine disruption is through hormone sensitization, where the EDC modulates intracellular signaling pathways that control nuclear receptor function, thereby regulating receptor transcriptional activity indirectly. Methoxyacetic acid (MAA), the primary, active metabolite of the industrial solvent ethylene glycol monomethyl ether and a testicular toxicant, belongs to this EDC class. Modulation of nuclear receptor activity by MAA could contribute to the testicular toxicity associated with MAA exposure. In the present study, we evaluated the impact of MAA on the transcriptional activity of several nuclear receptors including the androgen receptor (AR), which plays a pivotal role in the development and maturation of spermatocytes. AR transcriptional activity is shown to be increased by MAA through a tyrosine kinase signaling pathway that involves PI3-kinase. In a combinatorial setting with AR antagonists, MAA potentiated the AR response without significantly altering the EC(50) for androgen responsiveness, partially alleviating the antagonistic effect of the anti-androgens. Finally, MAA treatment of TM3 mouse testicular Leydig cells markedly increased the expression of Cyp17a1 and Shbg while suppressing Igfbp3 expression by ~90%. Deregulation of these genes may alter androgen synthesis and action in a manner that contributes to MAA-induced testicular toxicity.
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Affiliation(s)
- Gargi Bagchi
- Division of Cell and Molecular Biology, Department of Biology, Boston University, 5 Cummington Street, Boston, MA 02215, USA
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Bagchi G, Waxman DJ. Toxicity of ethylene glycol monomethyl ether: impact on testicular gene expression. ACTA ACUST UNITED AC 2007; 31:269-74. [PMID: 18179559 DOI: 10.1111/j.1365-2605.2007.00846.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Methoxyacetic acid (MAA), the active biological oxidation product of the industrial solvent ethylene glycol monomethyl ether (EGME), causes acute toxicity in several species including humans. MAA primarily affects tissues with rapidly dividing cells and high rates of energy metabolism, including testes, thymus and the fetus. Testicular toxicity, one of the most prominent consequences of EGME, and MAA, exposure, results from apoptosis of primary spermatocytes and is associated with changes in the expression of various genes and signalling pathways. This review of EGME metabolism and its organ-specific toxicities emphasizes genes and signalling pathways that are modulated by EGME exposure and their relevance to the molecular mechanisms underlying EGME and MAA toxicity. Of particular importance are the genes that code for oxidative stress response factors, protein kinases, and nuclear hormone receptors. Nuclear receptors and protein kinases regulate multiple cellular processes and are critical for signalling events required for spermatogenesis. De-regulation of their activity by EGME or MAA leads to inappropriate signalling in testicular cells. Oxidative stress in spermatocytes exposed to MAA triggers mitochondrial release of cytochrome C, activation of caspases and ultimately apoptosis. Detailed investigation of the molecular responses to MAA exposure may help elucidate the overall impact and extent of toxicity seen following EGME exposure. Finally, given the effects of EGME on multiple genes and signalling pathways in the testis, mixture studies combining EGME, or MAA, with other testicular toxicants may help identify toxicities that are aggravated by EGME exposure.
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Affiliation(s)
- Gargi Bagchi
- Division of Cell and Molecular Biology, Department of Biology, Boston University, Boston, MA 02215, USA
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Starek A, Szymczak W, Zapor L. Hematological effects of four ethylene glycol monoalkyl ethers in short-term repeated exposure in rats. Arch Toxicol 2007; 82:125-36. [PMID: 17874071 DOI: 10.1007/s00204-007-0236-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Accepted: 08/07/2007] [Indexed: 10/22/2022]
Abstract
This study was carried out to compare the hematological effects of 2-methoxyethanol (ME), 2-ethoxyethanol (EE), 2-isopropoxyethanol (IPE), and 2-butoxyethanol (BE) in short-term studies in rats. Male rats were subcutaneously treated with ME or EE at a dosage of 0, 1.25, 2.5 and 5.0 mM/kg in saline, 5 days per week, for 4 weeks. Other rats were exposed to IPE or BE at doses of 0, 0.25, 0.5, 0.75 and 1.25 mM/kg in the same manner. Administration of each chemical, except of ME, resulted in a time- and dose-dependent swelling of erythrocytes as evidenced by an increase in mean corpuscular volume (MCV). Subsequently, red blood cells (RBC), packed cell volumes (PCV), hemoglobin concentration (HGB), and mean cell hemoglobin concentration (MCHC) decreased. Furthermore, an increase in mean cell hemoglobin (MCH) and reticulocyte counts was observed. The onset of hemolysis induced by EE, IPE or BE was faster than after ME administration. While in rats exposed to ME hematological changes were strongly pronounced and progressively increased with exposure time beginning from the day 11, those in animals treated with EE were rather persisted at low constant level for all exposure period. In contrast, the rats exposed to IPE and BE demonstrated the dramatic hematological changes more pronounced in case of BE than IPE at the beginning of exposure (on day 4). Despite of exposure duration, these changes were regressed, although the decrease in RBC and MCHC and the increase in MCV and MCH in rats treated with highest doses of both compound (0.5, 0.75, and 1.25 mM/kg) were more persistent, probably due to selective hemolysis of the aged erythrocytes. In addition, significant leukopenia due to reduction of lymphocytes in rats exposed to ME was observed. In summary, this study demonstrated no tolerance to ME- and EE-induced intravascular hemolysis developed under these experimental conditions. On the contrary, tolerance to IPE- and BE-induced hemolysis in rats exposed to these compounds was prompted.
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Affiliation(s)
- Andrzej Starek
- Department of Biochemical Toxicology, Medical College, Jagiellonian University, Krakow, Poland.
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Wang RS, Ohtani K, Suda M, Kitagawa K, Nakayama K, Kawamoto T, Nakajima T. Reproductive toxicity of ethylene glycol monoethyl ether in Aldh2 knockout mice. INDUSTRIAL HEALTH 2007; 45:574-8. [PMID: 17878629 DOI: 10.2486/indhealth.45.574] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Ethylene glycol monoethyl ether (EGEE) can cause damage to testes and sperm, and its metabolites are believed to play an important role in its toxicity. Aldehyde dehydrogenase 2 (ALDH2) is involved in the metabolism of this chemical. To investigate whether and how the enzyme affects the toxicity of EGEE, we conducted experiments comparing Aldh2 knockout mice with wild-type mice. Administration of EGEE at 100 and 600 mg/kg/day for one week did not induce any significant change in the weight and body weight ratios of testes, prostate and epididymides in either Aldh2 knockout or wild-type mice. However, motion of sperm from the spermaduct, as analyzed with a Hamilton-Thorne Sperm analyzer, was slightly decreased in the low dose group, and significantly lower in the high dose group; and the percentage of progressive sperm was also reduced in the two EGEE groups. This effect of EGEE treatment was observed in the wild-type, but not in the Aldh2 knockout mice. Sperm motion from the cauda epididymides was not affected. On the other hand, the concentration of ethoxyacetic acid, a metabolite of EGEE, in 24 h pooled urine of EGEE-treated Aldh2 knockout mice was not significantly lower than that of the wild-type mice on most days of urine sampling. These results suggest that inactivation of the ALDH2 enzyme due to gene mutation may be linked to differences in the susceptibility to EGEE-induced sperm toxicity.
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Affiliation(s)
- Rui-Sheng Wang
- National Institute of Occupational Safety and Health, Kawasaki, Japan
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Timour Q, Biggi-Bernard U, Descotes J. [Hormone replacement therapy: toxicity of glycol ethers]. ACTA ACUST UNITED AC 2006; 36:62-7. [PMID: 17293254 DOI: 10.1016/j.jgyn.2006.09.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2006] [Revised: 05/12/2006] [Accepted: 09/14/2006] [Indexed: 12/01/2022]
Abstract
Glycol ethers (GE) belong to two main series: series E, which include ethylene glycol ethers (EGE) and series P which include propylene glycol ethers (PGE). GE are widely used as solvents in a large number of industrial, household and cosmetic applications. EGE can be found in water paints, varnishes, inks, household products. Severe adverse effects have been noted with pharmaceutical formulations containing diethylene glycol monoethyl-ethers and this led to withdrawal from the French market. The toxicity of GE depends on the molecular weight and the metabolites generated. It can manifest following acute or chronic exposure by disorders of the nervous system, bone marrow, immune system, kidneys as well as fertility, reproduction and embryofetal development. Several EGE are mutagenic. The carcinogenic risk is not known. The most toxic derivatives EGME, EGMEA, EGEE and EGEEA alter male and female fertility, and induce malformations. Taking these toxic effects into consideration, what is the place of GE as absorption promoting agents? An example is DEGEE, which facilitates estradiol penetration when used as a gel in the treatment of estrogen deficiency. This review is intended to address this issue.
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Affiliation(s)
- Q Timour
- Laboratoire de Pharmacologie Médicale (EA 1896), UFR Lyon-Grange-Blanche, 8, avenue Rockefeller, 69373 Lyon cedex 08, France.
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Wang RS, Ohtani K, Suda M, Nakajima T. Inhibitory effect of ethylene glycol monoethyl ether on rat sperm motion. INDUSTRIAL HEALTH 2006; 44:665-8. [PMID: 17085930 DOI: 10.2486/indhealth.44.665] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Ethylene glycol monoethyl ether (EGEE) is known to have testicular toxicity. To elucidate whether EGEE has any effect on sperm motion, especially in the case of short time exposure, we conducted a series of in vivo experiments with rats, as well as an in vitro study with rat sperm. Sperm from cauda epididymides and spermaducts was analyzed for the change in motion with a Hamilton-Thorne Sperm analyzer. Administration of EGEE at 600 mg/kg/d for five weeks significantly decreased total and progressive motility of sperm to 15-30% of controls, in both the cauda epididymis and the spermaduct. The time-course experiment using a single dose of 1,000 mg/kg showed that damage to sperm motion was evident at 12-24 h after EGEE administration. Addition of EGEE to the medium of sperm had no effect on its motion, but the metabolite ethoxyacetic acid showed a significant inhibitory effect. These results suggest that besides its toxicity to spermatogenesis, the metabolite of EGEE may also directly affect the motion of mature sperm.
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Affiliation(s)
- Rui-Sheng Wang
- National Institute of Occupational Safety and Health, Nagao, Kawasaki, Japan
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