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Liao D, Xiong S, An S, Tao L, Dai L, Tian Y, Chen W, He C, Xu P, Wu N, Liu X, Zhang H, Hu Z, Deng M, Liu Y, Li Q, Shang X, Shen X, Zhou Y. Association of urinary polycyclic aromatic hydrocarbon metabolites with gestational diabetes mellitus and gestational hypertension among pregnant women in Southwest China: A cross-sectional study. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 343:123206. [PMID: 38145636 DOI: 10.1016/j.envpol.2023.123206] [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: 09/21/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 12/27/2023]
Abstract
The association of polycyclic aromatic hydrocarbons (PAHs) with gestational diabetes mellitus (GDM) and gestational hypertension during pregnancy has not yet been established. To investigate the association between PAH exposure and GDM and gestational hypertension, we conducted a cross-sectional study of 4206 pregnant women from the Zunyi birth cohort in southwestern China. Gas chromatography/mass spectrometry was used to detect the urinary levels of 10 monohydroxylated PAHs (OH-PAHs). GDM and gestational hypertension were diagnosed and the relevant information was documented by specialist obstetricians and gynecologists. Logistic regression and restricted cubic spline regression were employed to investigate their single and nonlinear associations. Stratified analyses of pregnancy and body mass index data were conducted to determine their moderating effects on the abovementioned associations. Compared with the first quartile of urinary ∑OH-PAHs, the third or fourth quartile in all study participants was associated with an increased risk of GDM (quartile 3: odds ratio [OR] = 1.35, 95% confidence interval [CI]: 1.03-1.77) and gestational hypertension (quartile 3: OR = 1.88, 95% CI: 1.26-2.81; quartile 4: OR = 1.58, 95% CI: 1.04-2.39), respectively. Nonlinear associations of 1-OH-PYR with GDM (cutoff level: 0.02 μg/g creatinine [Cr]) and 1-OH-PHE with gestational hypertension (cutoff level: 0.06 μg/g Cr) were also observed. In pregnant women with overweight or obesity, 1-OH-PHE and 3-OH-PHE were more strongly associated with gestational hypertension. Our results indicate that exposure to PAH during pregnancy may significantly increase the maternal risks of GDM and gestational hypertension; however, this finding still needs to be confirmed through larger-scale prospective studies and biological evidence.
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Affiliation(s)
- Dengqing Liao
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Shimin Xiong
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Songlin An
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Lin Tao
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Lulu Dai
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Yingkuan Tian
- Medical Department, Xingyi People's Hospital, Xingyi, 562400, China
| | - Wei Chen
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Caidie He
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Pei Xu
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Nian Wu
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Xiang Liu
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Haonan Zhang
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Zhongmei Hu
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China; Reproductive Centre, Affiliated Hospital of Zunyi Medical University, Zunyi, 563000, China
| | - Mingyu Deng
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China; Department of Obstetrics and Gynecology, Affiliated Hospital of Zunyi Medical University, Zunyi, 563000, China
| | - Yijun Liu
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Quan Li
- Department of Obstetrics and Gynecology, Affiliated Hospital of Zunyi Medical University, Zunyi, 563000, China
| | - Xuejun Shang
- Department of Andrology, School of Medicine, Jinling Hospital, Nanjing University, Nanjing, 210002, China
| | - Xubo Shen
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China
| | - Yuanzhong Zhou
- School of Public Health, Zunyi Medical University, Zunyi, 563000, China; Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, China.
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Su AL, Lash LH, Loch-Caruso R. N-Acetyl-L-cysteine and aminooxyacetic acid differentially modulate toxicity of the trichloroethylene metabolite S-(1,2-dichlorovinyl)-L-cysteine in human placental villous trophoblast BeWo cells. Toxicology 2023; 495:153611. [PMID: 37544576 PMCID: PMC10874504 DOI: 10.1016/j.tox.2023.153611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/23/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
Trichloroethylene (TCE) is a known human carcinogen with toxicity attributed to its metabolism. S-(1,2-Dichlorovinyl)-L-cysteine (DCVC) is a metabolite of TCE formed downstream in TCE glutathione (GSH) conjugation and is upstream of several toxic metabolites. Despite knowledge that DCVC stimulates reactive oxygen species (ROS) generation and apoptosis in placental cells, the extent to which these outcomes are attributable to DCVC metabolism is unknown. The current study used N-acetyl-L-cysteine (NAC) at 5 mM and aminooxyacetic acid (AOAA) at 1 mM as pharmacological modifiers of DCVC metabolism to investigate DCVC toxicity at concentrations of 5-50 µM in the human placental trophoblast BeWo cell model capable of forskolin-stimulated syncytialization. Exposures of unsyncytialized BeWo cells, BeWo cells undergoing syncytialization, and syncytialized BeWo cells were studied. NAC pre/co-treatment with DCVC either failed to inhibit or exacerbated DCVC-induced H2O2 abundance, PRDX2 mRNA expression, and BCL2 mRNA expression. Although NAC increased mRNA expression of CYP3A4, which would be consistent with increased generation of the toxic metabolite N-acetyl-DCVC sulfoxide (NAcDCVCS), a CYP3A4 inhibitor ketoconazole did not significantly alter BeWo cell responses. Moreover, AOAA failed to inhibit cysteine conjugate β-lyase (CCBL), which bioactivates DCVC, and did not affect the percentage of nuclei condensed or fragmented, a measure of apoptosis, in all BeWo cell models. However, syncytialized cells had higher CCBL activity compared to unsyncytialized cells, suggesting that the former may be more sensitive to DCVC toxicity. Together, although neither NAC nor AOAA mitigated DCVC toxicity, differences in CCBL activity and potentially CYP3A4 expression dictated the differential toxicity derived from DCVC.
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Affiliation(s)
- Anthony L Su
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
| | - Lawrence H Lash
- Department of Pharmacology, Wayne State University School of Medicine, 540 East Canfield Avenue, Detroit, MI 48201, USA
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA
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Su AL, Harris SM, Elkin ER, Karnovsky A, Colacino J, Loch-Caruso RK. Trichloroethylene Metabolite S-(1,2-Dichlorovinyl)-l-cysteine Stimulates Changes in Energy Metabolites and Amino Acids in the BeWo Human Placental Trophoblast Model during Syncytialization. Chem Res Toxicol 2023; 36:882-899. [PMID: 37162359 PMCID: PMC10499396 DOI: 10.1021/acs.chemrestox.3c00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Syncytialization, the fusion of cytotrophoblasts into an epithelial barrier that constitutes the maternal-fetal interface, is a crucial event of placentation. This process is characterized by distinct changes to amino acid and energy metabolism. A metabolite of the industrial solvent trichloroethylene (TCE), S-(1,2-dichlorovinyl)-l-cysteine (DCVC), modifies energy metabolism and amino acid abundance in HTR-8/SVneo extravillous trophoblasts. In the current study, we investigated DCVC-induced changes to energy metabolism and amino acids during forskolin-stimulated syncytialization in BeWo cells, a human villous trophoblastic cell line that models syncytialization in vitro. BeWo cells were exposed to forskolin at 100 μM for 48 h to stimulate syncytialization. During syncytialization, BeWo cells were also treated with DCVC at 0 (control), 10, or 20 μM. Following treatment, the targeted metabolomics platform, "Tricarboxylic Acid Plus", was used to identify changes in energy metabolism and amino acids. DCVC treatment during syncytialization decreased oleic acid, aspartate, proline, uridine diphosphate (UDP), UDP-d-glucose, uridine monophosphate, and cytidine monophosphate relative to forskolin-only treatment controls, but did not increase any measured metabolite. Notable changes stimulated by syncytialization in the absence of DCVC included increased adenosine monophosphate and guanosine monophosphate, as well as decreased aspartate and glutamate. Pathway analysis revealed multiple pathways in amino acid and sugar metabolisms that were altered with forskolin-stimulated syncytialization alone and DCVC treatment during syncytialization. Analysis of ratios of metabolites within the pathways revealed that DCVC exposure during syncytialization changed metabolite ratios in the same or different direction compared to syncytialization alone. Building off our oleic acid findings, we found that extracellular matrix metalloproteinase-2, which is downstream in oleic acid signaling, underwent the same changes as oleic acid. Together, the metabolic changes stimulated by DCVC treatment during syncytialization suggest changes in energy metabolism and amino acid abundance as potential mechanisms by which DCVC could impact syncytialization and pregnancy.
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Affiliation(s)
- Anthony L. Su
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109
| | - Sean M. Harris
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109
| | - Elana R. Elkin
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109
| | - Alla Karnovsky
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Justin Colacino
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Rita Karen Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109
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Yang LJ, He JB, Jiang Y, Li J, Zhou ZW, Zhang C, Tao X, Chen AF, Peng C, Xie HH. Berberine hydrochloride inhibits migration ability via increasing inducible NO synthase and peroxynitrite in HTR-8/SVneo cells. JOURNAL OF ETHNOPHARMACOLOGY 2023; 305:116087. [PMID: 36584918 DOI: 10.1016/j.jep.2022.116087] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Inadequate trophoblasts migration and invasion is considered as an initial event resulting in preeclampsia, which is closely related to oxidative stress. Berberine hydrochloride (BBR), extracted from the traditional medicinal plant Coptis chinensis Franch., exerts a diversity of pharmacological effects, and the crude drug has been widely taken by most Chinese women to treat nausea and vomit during pregnancy. But there is no research regarding its effects on trophoblast cell function. AIM OF THE STUDY This study aimed to investigate the effect of BBR on human-trophoblast-derived cell line (HTR-8/SVneo) migration ability and its mechanism. MATERIALS AND METHODS Cell viability was detected by CCK-8 assay. The effect of BBR on cells migration function was examined by scratch wound healing assay and transwell migration assay. Intracellular nitric oxide (NO), superoxide (O2-) and peroxynitrite (ONOO-) levels were measured by flow cytometry. The expression levels of inducible NO synthase (iNOS), eNOS, p-eNOS, MnSOD, CuZnSOD, Rac1, NOX1, TLR4, nuclear factor-κB (NF-κB), p-NFκB, pro-inflammatory cytokines (TNF-α, IL-1β and IL-6) in cells were analyzed by Western blotting. Uric acid sodium salt (UA), the scavenger of ONOO-, PEG-SOD (a specific superoxide scavenger), L-NAME (a NOS inhibitor) and antioxidants (Vit E and DFO) were further used to characterize the pathway of BBR action. RESULTS 5 μM BBR decreased both the migration distance and the number of migrated cells without affecting cells viability in HTR-8/SVneo cells after 24 h treatment. BBR could increase the level of NO in HTR-8/SVneo cells, and the over-production of NO might be attributable to iNOS, but not eNOS. BBR could increase intracellular O2- levels, and the over-production of O2- is closely related with Rac1 in HTR-8/SVneo cells. The excessive production of NO and O2- further react to form ONOO-, and the increased ONOO- level induced by BBR was blunted by UA. Moreover, UA improved the impaired migration function caused by BBR in HTR-8/SVneo cells. The depressed migration function stimulated by BBR in HTR-8/SVneo cells was diminished by PEG-SOD and L-NAME. Furthermore, BBR increased the expression of IL-6 in HTR-8/SVneo cells, and antioxidants (Vit E and DFO) could decrease the expression of IL-6 and iNOS induced by BBR. CONCLUSIONS BBR inhibits the cell migration ability through increasing inducible NO synthase and peroxynitrite in HTR-8/SVneo cells, indicating that BBR and traditional Chinese medicines containing a high proportion of BBR should be used with caution in pregnant women.
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Affiliation(s)
- Li-Jun Yang
- School of Public Health and Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China; Institute for Developmental and Regenerative Cardiovascular Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Jia-Bei He
- School of Public Health and Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China; Institute for Developmental and Regenerative Cardiovascular Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Yu Jiang
- Department of Pharmacy, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Jianzhong Li
- Department of Biochemical Pharmacy, School of Pharmacy, Naval Medical University, Shanghai, 200433, China
| | - Zhen-Wei Zhou
- School of Public Health and Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China; Institute for Developmental and Regenerative Cardiovascular Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Chuan Zhang
- School of Medicine, Shanghai University, Shanghai, 200444, China
| | - Xia Tao
- Department of Pharmacy, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Alex F Chen
- Institute for Developmental and Regenerative Cardiovascular Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
| | - Cheng Peng
- School of Public Health and Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China; Institute for Developmental and Regenerative Cardiovascular Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
| | - He-Hui Xie
- School of Public Health and Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China; Institute for Developmental and Regenerative Cardiovascular Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
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Su AL, Loch-Caruso R. Apoptotic responses stimulated by the trichloroethylene metabolite S-(1,2-dichlorovinyl)-L-cysteine depend on cell differentiation state in BeWo human trophoblast cells. Toxicol In Vitro 2023; 86:105514. [PMID: 36336211 PMCID: PMC9949904 DOI: 10.1016/j.tiv.2022.105514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 10/23/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022]
Abstract
During pregnancy, the placental villous cytotrophoblasts differentiate via cell fusion and multinucleation to create syncytiotrophoblasts, a cell type at the maternal-fetal interface. Apoptosis of syncytiotrophoblasts is associated with adverse pregnancy outcomes. The human trophoblast BeWo cell line has been used as an in vitro model for this differentiation process, also known as syncytialization. In the current study, we exposed unsyncytialized BeWo cells, BeWo cells undergoing syncytialization, and syncytialized BeWo cells to S-(1,2-dichlorovinyl)-L-cysteine (DCVC), a metabolite of the industrial chemical trichloroethylene (TCE). DCVC exposure at 50 μM for 48 h decreased cell viability, increased cytotoxicity, increased caspase 3/7 activity, and increased nuclear condensation or fragmentation in BeWo cells regardless of their differentiation status. Investigating mechanisms of apoptosis, DCVC increased H2O2 abundance and decreased PRDX2 mRNA in all three BeWo cell models. DCVC decreased tumor necrosis factor-receptor 1 (TNF-R1) concentration in media and decreased NFKB1 and PRDX1 mRNA expression in syncytialized BeWo cells only. DCVC decreased BCL2 mRNA expression in syncytializing BeWo cells and in syncytialized BeWo cells only. Decreased LGALS3 mRNA was seen in unsyncytialized BeWo cells only. Together, these data suggest roles for oxidative stress and pro-inflammatory mechanisms underlying apoptosis in BeWo cells with differences depending on differentiation state.
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Affiliation(s)
- Anthony L Su
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
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Zhang C, Guo Y, Yang Y, Du Z, Fan Y, Zhao Y, Yuan S. Oxidative stress on vessels at the maternal-fetal interface for female reproductive system disorders: Update. Front Endocrinol (Lausanne) 2023; 14:1118121. [PMID: 36967779 PMCID: PMC10036807 DOI: 10.3389/fendo.2023.1118121] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 02/22/2023] [Indexed: 03/12/2023] Open
Abstract
Considerable evidence shows that oxidative stress exists in the pathophysiological process of female reproductive system diseases. At present, there have been many studies on oxidative stress of placenta during pregnancy, especially for preeclampsia. However, studies that directly focus on the effects of oxidative stress on blood vessels at the maternal-fetal interface and their associated possible outcomes are still incomplete and ambiguous. To provide an option for early clinical prediction and therapeutic application of oxidative stress in female reproductive system diseases, this paper briefly describes the composition of the maternal-fetal interface and the molecular mediators produced by oxidative stress, focuses on the sources of oxidative stress and the signaling pathways of oxidative stress at the maternal-fetal interface, expounds the adverse consequences of oxidative stress on blood vessels, and deeply discusses the relationship between oxidative stress and some pregnancy complications and other female reproductive system diseases.
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Affiliation(s)
- Chenlu Zhang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yaxin Guo
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yan Yang
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
| | - Zhaojin Du
- Reproductive Medical Center, Qingdao Women and Children's Hospital, Qingdao University, Qingdao, China
| | - Yunhui Fan
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yin Zhao
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- *Correspondence: Yin Zhao, ; Suzhen Yuan,
| | - Suzhen Yuan
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- *Correspondence: Yin Zhao, ; Suzhen Yuan,
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Wang F, Hong Y, Jiang W, Wang Y, Chen M, Zang D, Zhu Q. ROS-mediated inflammatory response in liver damage via regulating the Nrf2/HO-1/NLRP3 pathway in mice with trichloroethylene hypersensitivity syndrome. J Immunotoxicol 2022; 19:100-108. [PMID: 36070617 DOI: 10.1080/1547691x.2022.2111003] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Trichloroethylene hypersensitivity syndrome (THS), mainly caused by occupational exposure to trichloroethylene (TCE), can give rise to serious and fatal hepatic damage. To date, the precise mechanisms of hepatic damage in THS remain unclear. Recent studies showed that reactive oxygen species (ROS) play a core role in cell death and inflammatory response. Therefore, the present study sought to explore whether ROS-mediated inflammatory responses contribute to the hepatic damage in TCE sensitization. To this end, a mouse model of TCE sensitization was established; in some cases, hosts were pretreated with tempol, an ROS scavenger. The results showed that TCE sensitization caused hepatic pathological/functional changes, ROS generation, and oxidative stress, alterations of the anti-oxidant defense Nrf2/HO-1/NLRP3 pathway, and pro-inflammatory cytokine formation in the liver. ROS scavenging via pretreatment with tempol was found not only to inhibit the hepatic oxidative stress, but also to regulate Nrf2/HO-1/NLRP3 pathway activity. In all cases, tempol was able to mitigate the pathologic changes induced by TCE sensitization. In summary, the results here demonstrated a novel molecular mechanism wherein ROS-mediated inflammatory responses play a central role in TCE-induced liver damage. Therapies targeting ROS scavenging could help to protect against hepatic damage by regulating Nrf2/HO-1/NLRP3 pathway activities in TCE-sensitized hosts.
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Affiliation(s)
- Feng Wang
- Department of Dermatology, Second Hospital of Anhui Medical University, Hefei, China.,Key Laboratory of Dermatology, Ministry of Education, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yiting Hong
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, China
| | - Wei Jiang
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, China
| | - Yican Wang
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, China
| | - Muyue Chen
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, China
| | - Dandan Zang
- Center for Scientific Research and Experiment, Anhui Medical University, Hefei, China
| | - Qixing Zhu
- Key Laboratory of Dermatology, Ministry of Education, First Affiliated Hospital of Anhui Medical University, Hefei, China.,Department of Dermatology, First Affiliated Hospital of Anhui Medical University, Hefei, China
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Harris SM, Bakulski KM, Dou J, Houskamp E, Scheeres EC, Schellenboom E, Harlow O, Loch-Caruso R, Boldenow E. The trichloroethylene metabolite S-(1,2-dichlorovinyl)-l-cysteine inhibits lipopolysaccharide-induced inflammation transcriptomic pathways and cytokine secretion in a macrophage cell model. Toxicol In Vitro 2022; 84:105429. [PMID: 35811015 PMCID: PMC10353343 DOI: 10.1016/j.tiv.2022.105429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/16/2022] [Accepted: 07/02/2022] [Indexed: 10/17/2022]
Abstract
Studies have shown that the trichloroethylene metabolite S-(1,2-dichlorovinyl)-l-cysteine (DCVC) inhibits cytokine secretion in pathogen stimulated fetal membrane tissue but little is known about the mechanism for these effects, including which cell types or transcriptomic pathways are impacted. Macrophages play a critical role in fetal membrane immune responses during infection. We tested the hypothesis that DCVC inhibits lipopolysaccharide (LPS) stimulated inflammation pathways in macrophage-like THP-1 cells. We treated THP-1 cells for 24 h then treated with 1, 5, or 10 μM DCVC for 24 h. After a 4 h incubation with lipopolysaccharide (LPS), we collected RNA and cell media. We performed transcriptomic analysis using RNA sequencing for 5 μM DCVC treatments and quantified cytokine release (IL-1β, IL-6, and TNF-α) for 1, 5 and 10 μM DCVC treatments. RNA sequencing analysis revealed 1399 differentially expressed genes (FDR < 0.05 and log 2 fold change magnitude>2.5) in cells co-treated with DCVC and LPS compared to LPS alone. For example, TNF had a log2(fold-change) = -3.5 with the addition of DCVC. Pathways downregulated (adjusted p-value<0.05) in DCVC+LPS treatments versus LPS-only treatments included: "acute inflammatory response", "production of molecular mediator of immune response" and "phagocytosis". LPS increased IL-1β, IL-6, and TNF-α levels in culture media (p < 0.001), but this was inhibited by co-treatment with DCVC (p < 0.001 for LPS vs. LPS + DCVC treatments). Our results demonstrate that DCVC suppresses inflammatory responses in macrophages.
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Affiliation(s)
- Sean M Harris
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI 48109-2029, USA.
| | - Kelly M Bakulski
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109-2029, USA.
| | - John Dou
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109-2029, USA.
| | - Ethan Houskamp
- Department of Biology, Calvin University, Grand Rapids, MI 49546-4402, USA.
| | - Eleanor C Scheeres
- Department of Biology, Calvin University, Grand Rapids, MI 49546-4402, USA.
| | - Emily Schellenboom
- Department of Biology, Calvin University, Grand Rapids, MI 49546-4402, USA.
| | - Olivia Harlow
- Department of Biology, Calvin University, Grand Rapids, MI 49546-4402, USA; Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI 48109-2029, USA.
| | - Erica Boldenow
- Department of Biology, Calvin University, Grand Rapids, MI 49546-4402, USA.
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9
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Abdraboh ME, El-Missiry MA, Othman AI, Taha AN, Elhamed DSA, Amer ME. Constant light exposure and/or pinealectomy increases susceptibility to trichloroethylene-induced hepatotoxicity and liver cancer in male mice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:60371-60384. [PMID: 35419691 PMCID: PMC9427929 DOI: 10.1007/s11356-022-19976-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 03/25/2022] [Indexed: 05/09/2023]
Abstract
Exposure to light at night, pineal gland impairment, and the environmental pollutant trichloroethylene (TCE) have serious implications for health and contribute to illness, including liver cancer. The adverse effect of the association of continuous exposure to light with decreased melatonin levels and TCE-induced toxicity is not disclosed in target organs. This work explored the role of light and pineal impairment in increasing susceptibility to liver toxicity and cancer upon exposure to TCE. Male albino mice were divided into groups as follows: control group (12-h light/12-h dark cycle), constant light (24-h light), pinealectomized (Pnx) mice, sham surgically treated group, TCE-treated groups subjected to two doses (500 and 1000 mg/kg) at two different light regimens, and combination of Pnx and TCE-treated mice kept at a 12-h light/12-h dark cycle. Melatonin levels were significantly decreased in both Pnx mice and TCE-treated animals at both light regimens. Aspartate transaminase, alanine aminotransferase, activities, and serum bilirubin levels were significantly elevated, whereas albumin levels were markedly decreased in Pnx mice, TCE-treated mice, and the combination group. Histopathological investigations reflected changes in liver function parameters indicating liver injury and induction of cancer. These effects were accompanied by significant increase of the liver cancer biomarker alpha-fetoprotein and the expression of the metastatic markers CD44, TGFβ-1, and VEGF, along with increased oxidative stress indicators and inflammatory cytokines (IL-6, IL-1β, and TNF-α) in both Pnx and TCE-treated mice and the combination group at both light regimens. Taken together, our findings indicated that low melatonin levels, exposure to constant light, and the combination of both factors increases susceptibility to the toxic and carcinogenic effects of TCE on the liver.
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Affiliation(s)
- Mohamed E Abdraboh
- Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt
- Faculty of Science, New Mansoura University, Mansoura, Egypt
| | | | - Azza I Othman
- Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Ahmed Nageeb Taha
- Neurosurgery Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Dalia S Abd Elhamed
- Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Maggie E Amer
- Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt
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10
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Elkin ER, Su AL, Kilburn BA, Bakulski KM, Armant DR, Loch-Caruso R. Toxicity assessments of selected trichloroethylene and perchloroethylene metabolites in three in vitro human placental models. Reprod Toxicol 2022; 109:109-120. [PMID: 35304307 PMCID: PMC9107309 DOI: 10.1016/j.reprotox.2022.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 03/07/2022] [Accepted: 03/10/2022] [Indexed: 01/25/2023]
Abstract
Residential and occupational exposures to the industrial solvents perchloroethylene (PERC) and trichloroethylene (TCE) present public health concerns. In humans, maternal PERC and TCE exposures can be associated with adverse birth outcomes. Because PERC and TCE are biotransformed to toxic metabolites and placental dysfunction can contribute to adverse birth outcomes, the present study compared the toxicity of key PERC and TCE metabolites in three in vitro human placenta models. We measured cell viability and caspase 3 + 7 activity in the HTR-8/SVneo and BeWo cell lines, and caspase 3 + 7 activity in first trimester villous explant cultures. Cultures were exposed for 24 h to 5-100 µM S-(1,2-dichlorovinyl)-L-cysteine (DCVC) and S-(1,2,2-trichlorovinyl)-L-cysteine (TCVC), or 5-200 µM trichloroacetate (TCA) and dichloroacetate (DCA). DCVC significantly reduced cell viability and increased caspase 3 + 7 activity in HTR-8/SVneo cells at a lower concentration (20 µM) compared with concentrations toxic to BeWo cells and villous explants. Similarly, TCVC reduced cell viability and increased caspase 3 + 7 activity in HTR-8/SVneo cells but not in BeWo cells. TCA and DCA had only negligible effects on HTR-8/SVneo or BeWo cells. This study advances understanding of potential risks of PERC and TCE exposure during pregnancy by identifying metabolites toxic in placental cells and tissues.
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Affiliation(s)
- Elana R Elkin
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA; Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan, USA.
| | - Anthony L Su
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA; Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Brian A Kilburn
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan, USA; Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Kelly M Bakulski
- Department of Epidemiology, University of Michigan, Ann Arbor, Michigan, USA; Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - D Randall Armant
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan, USA; Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA; Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA
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11
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Su AL, Harris SM, Elkin ER, Karnovsky A, Colacino JA, Loch-Caruso R. Trichloroethylene modifies energy metabolites in the amniotic fluid of Wistar rats. Reprod Toxicol 2022; 109:80-92. [PMID: 35301063 PMCID: PMC9000924 DOI: 10.1016/j.reprotox.2022.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 03/05/2022] [Accepted: 03/11/2022] [Indexed: 10/18/2022]
Abstract
Exposure to trichloroethylene (TCE), an industrial solvent, is associated with several adverse pregnancy outcomes in humans and decreased fetal weight in rats. However, effects of TCE on energy metabolites in amniotic fluid, which have associations with pregnancy outcomes, has not been published previously. In the current exploratory study, timed-pregnant Wistar rats were exposed to 480 mg TCE/kg/day via vanilla wafer or to vehicle (wafer) alone from gestational day (GD) 6-16. Amniotic fluid collected on GD 16 was analyzed for metabolites important in energy metabolism using short chain fatty acid and tricarboxylic acid plus platforms (N = 4 samples/sex/treatment). TCE decreased concentrations of the following metabolites in amniotic fluid for both fetal sexes: 6-phosphogluconate, guanosine diphosphate, adenosine diphosphate, adenosine triphosphate, and flavin adenine dinucleotide. TCE decreased fructose 1,6-bisphosphate and guanosine triphosphate concentrations in amniotic fluid of male but not female fetuses. Moreover, TCE decreased uridine diphosphate-D-glucuronate concentrations, and increased arginine and phosphocreatine concentrations, in amniotic fluid of female fetuses only. No metabolites were increased in amniotic fluid of male fetuses. Pathway analysis suggested that TCE altered folate biosynthesis and pentose phosphate pathway in both sexes. Using metabolite ratios to investigate changes within specific pathways, some ratio alterations, including those in arginine metabolism and phenylalanine metabolism, were detected in females only. Ratio analysis also suggested enzymes, including gluconokinase, as potential TCE targets. Together, results from this exploratory study suggest that TCE differentially modified energy metabolites in amniotic fluid based on sex. These findings may inform future studies of TCE reproductive toxicity.
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Affiliation(s)
- Anthony L Su
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109, USA.
| | - Sean M Harris
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109, USA.
| | - Elana R Elkin
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109, USA.
| | - Alla Karnovsky
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Palmer Commons, 100 Washtenaw Ave #2017, Ann Arbor, MI 48109, USA.
| | - Justin A Colacino
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109, USA; Department of Nutritional Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109, USA.
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109, USA.
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12
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Pinto-Ribeiro L, Silva C, Andrade N, Martel F. α-tocopherol prevents oxidative stress-induced proliferative dysfunction in first-trimester human placental (HTR-8/SVneo) cells. Reprod Biol 2022; 22:100602. [PMID: 35016050 DOI: 10.1016/j.repbio.2022.100602] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/09/2021] [Accepted: 01/02/2022] [Indexed: 02/06/2023]
Abstract
Extravillous trophoblasts (EVTs) are the main participants in the process of placentation, an early process critical for placental growth and function involving an adequate invasion and complete remodelling of the maternal spiral arteries during early pregnancy. An increase in oxidative stress during pregnancy is associated with the onset and progression of several pregnancy disorders, including preeclampsia and gestational diabetes mellitus and it also occurs due to exposure of pregnant women to some xenobiotics (eg. alcohol). This study aimed to investigate how oxidative stress affects EVTs, and the ability of several distinct antioxidant agents to prevent these changes. For this, we exposed HTR8/SVneo cells to tert-butylhydroperoxide (0.5 μM; 24 h), which was able to increase lipid peroxidation and protein carbonyl levels. Under these conditions, there was a decrease in proliferation rates, culture growth, migratory and angiogenic capacities and an increase in the apoptosis rates. The antiproliferative effect of TBH was supressed by simultaneous treatment of the cells with α-tocopherol, but other antioxidants (vitamin C, allopurinol, apocynin, N-acetylcysteine, quercetin and resveratrol) were ineffective. α-tocopherol was also able to abolish the effect of TBH on lipid peroxidation and protein carbonyl levels. Overall, our results show that oxidative stress interferes with EVT characteristics essential for the placentation process, which may contribute to the association between oxidative stress and pregnancy disorders. Our results also show that the nature of the in vitro model of oxidative stress-induction is an important determinant of the cellular consequences of oxidative stress and, therefore, of the efficacy of antioxidants.
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Affiliation(s)
- Lígia Pinto-Ribeiro
- Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Porto, Portugal
| | - Cláudia Silva
- Unit of Biochemistry, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal; Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
| | - Nelson Andrade
- Unit of Biochemistry, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal; Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
| | - Fátima Martel
- Unit of Biochemistry, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal; Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal.
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13
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Lokeswara AW, Hiksas R, Irwinda R, Wibowo N. Preeclampsia: From Cellular Wellness to Inappropriate Cell Death, and the Roles of Nutrition. Front Cell Dev Biol 2021; 9:726513. [PMID: 34805141 PMCID: PMC8602860 DOI: 10.3389/fcell.2021.726513] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/07/2021] [Indexed: 12/27/2022] Open
Abstract
Preeclampsia is one of the most common obstetrical complications worldwide. The pathomechanism of this disease begins with abnormal placentation in early pregnancy, which is associated with inappropriate decidualization, vasculogenesis, angiogenesis, and spiral artery remodeling, leading to endothelial dysfunction. In these processes, appropriate cellular deaths have been proposed to play a pivotal role, including apoptosis and autophagy. The proper functioning of these physiological cell deaths for placentation depends on the wellbeing of the trophoblasts, affected by the structural and functional integrity of each cellular component including the cell membrane, mitochondria, endoplasmic reticulum, genetics, and epigenetics. This cellular wellness, which includes optimal cellular integrity and function, is heavily influenced by nutritional adequacy. In contrast, nutritional deficiencies may result in the alteration of plasma membrane, mitochondrial dysfunction, endoplasmic reticulum stress, and changes in gene expression, DNA methylation, and miRNA expression, as well as weakened defense against environmental contaminants, hence inducing a series of inappropriate cellular deaths such as abnormal apoptosis and necrosis, and autophagy dysfunction and resulting in abnormal trophoblast invasion. Despite their inherent connection, the currently available studies examined the functions of each organelle, the cellular death mechanisms and the nutrition involved, both physiologically in the placenta and in preeclampsia, separately. Therefore, this review aims to comprehensively discuss the relationship between each organelle in maintaining the physiological cell death mechanisms and the nutrition involved, and the interconnection between the disruptions in the cellular organelles and inappropriate cell death mechanisms, resulting in poor trophoblast invasion and differentiation, as seen in preeclampsia.
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Affiliation(s)
- Angga Wiratama Lokeswara
- Faculty of Medicine, Dr. Cipto Mangunkusumo Hospital, University of Indonesia, Jakarta, Indonesia
| | - Rabbania Hiksas
- Faculty of Medicine, Dr. Cipto Mangunkusumo Hospital, University of Indonesia, Jakarta, Indonesia
| | - Rima Irwinda
- Maternal Fetal Division, Department of Obstetrics and Gynaecology, Faculty of Medicine, Dr. Cipto Mangunkusumo Hospital, University of Indonesia, Jakarta, Indonesia
| | - Noroyono Wibowo
- Maternal Fetal Division, Department of Obstetrics and Gynaecology, Faculty of Medicine, Dr. Cipto Mangunkusumo Hospital, University of Indonesia, Jakarta, Indonesia
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14
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Elkin ER, Bakulski KM, Colacino JA, Bridges D, Kilburn BA, Armant DR, Loch-Caruso R. Transcriptional profiling of the response to the trichloroethylene metabolite S-(1,2-dichlorovinyl)-L-cysteine revealed activation of the eIF2α/ATF4 integrated stress response in two in vitro placental models. Arch Toxicol 2021; 95:1595-1619. [PMID: 33725128 PMCID: PMC7961173 DOI: 10.1007/s00204-021-03011-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 02/25/2021] [Indexed: 12/13/2022]
Abstract
Trichloroethylene (TCE) is an industrial solvent and widespread environmental contaminant. Although TCE exposure is prevalent, epidemiological studies of TCE exposure associations with adverse birth outcomes are inconclusive. Prior studies show that the TCE metabolite S-(1,2-dichlorovinyl)-l-cysteine (DCVC) exhibits toxicity in a placental cell line. In the current study, genome-wide gene expression and gene set enrichment analyses were used to identify novel genes and pathway alterations in the HTR-8/SVneo human trophoblast cell line and human placental villous explants treated with DCVC at concentrations relevant to human exposures. In the cells, concentration- and time-dependent effects were observed, as evidenced by the magnitude of altered gene expression after treatment with 20 µM DCVC versus 10 µM, and 12-h versus 6-h of treatment. Comparing the two models for the transcriptional response to 12-h 20 µM DCVC treatment, no differentially expressed genes reached significance in villous explants, whereas 301 differentially expressed genes were detected in HTR-8/SVneo cells compared with non-treated controls (FDR < 0.05 + LogFC > 0.35 [FC > 1.3]). GSEA revealed five upregulated enriched pathways in common between explants and cells (FDR < 0.05). Moreover, all 12-h DCVC treatment groups from both models contained upregulated pathways enriched for genes regulated by the ATF4 transcription factor. The overrepresentation of ATF4 regulation of differentially expressed genes indicated activation of the integrated stress response (ISR), a condition triggered by multiple stress stimuli, including the unfolded protein response. DCVC-induced ISR activation was confirmed by elevated eIF2α phosphorylation, ATF4 protein concentrations, and decreased global protein synthesis in HTR-8/SVneo cells. This study identifies a mechanism of DCVC-induced cytotoxicity by revealing the involvement of a specific stress signaling pathway.
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Affiliation(s)
- Elana R Elkin
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA.
| | - Kelly M Bakulski
- Department of Epidemiology, University of Michigan, Ann Arbor, MI, USA
| | - Justin A Colacino
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA.,Department of Nutritional Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Dave Bridges
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Brian A Kilburn
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA
| | - D Randall Armant
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA.,Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA
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15
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N-Acetyl-L-cysteine and aminooxyacetic acid differentially modulate trichloroethylene reproductive toxicity via metabolism in Wistar rats. Arch Toxicol 2021; 95:1303-1321. [PMID: 33599830 DOI: 10.1007/s00204-021-02991-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/21/2021] [Indexed: 10/22/2022]
Abstract
Exposure to the industrial solvent trichloroethylene (TCE) has been associated with adverse pregnancy outcomes in humans and decreased fetal weight in rats. TCE kidney toxicity can occur through formation of reactive metabolites via its glutathione (GSH) conjugation metabolic pathway, largely unstudied in the context of pregnancy. To investigate the contribution of the GSH conjugation pathway and oxidative stress to TCE toxicity during pregnancy, we exposed rats orally to 480 mg TCE/kg/day from gestational day (GD) 6 to GD 16 with and without N-acetyl-L-cysteine (NAC) at 200 mg/kg/day or aminooxyacetic acid (AOAA) at 20 mg/kg/day as pre/co-treatments from GD 5-16. NAC is a reactive oxygen species scavenger that modifies the GSH conjugation pathway, and AOAA is an inhibitor of cysteine conjugate β-lyase (CCBL) in the GSH conjugation pathway. TCE decreased fetal weight, and this was prevented by AOAA but not NAC pre/co-treatment to TCE. Although AOAA inhibited CCBL activity in maternal kidney, it did not inhibit CCBL activity in maternal liver and placenta, suggesting that AOAA prevention of TCE-induced decreased fetal weight was due to CCBL activity inhibition in the kidneys but not liver or placenta. Unexpectedly, NAC pre/co-treatment with TCE, relative to TCE treatment alone, altered placental morphology consistent with delayed developmental phenotype. Immunohistochemical staining revealed that the decidua basale, relative to basal and labyrinth zones, expressed the highest abundance of CCBL1, flavin-containing monooxygenase 3, and cleaved caspase-3. Together, the findings show the differential effects of NAC and AOAA on TCE-induced pregnancy outcomes are likely attributable to TCE metabolism modulation.
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16
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Barron A, McCarthy CM, O'Keeffe GW. Preeclampsia and Neurodevelopmental Outcomes: Potential Pathogenic Roles for Inflammation and Oxidative Stress? Mol Neurobiol 2021; 58:2734-2756. [PMID: 33492643 DOI: 10.1007/s12035-021-02290-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 01/12/2021] [Indexed: 12/13/2022]
Abstract
Preeclampsia (PE) is a common and serious hypertensive disorder of pregnancy that occurs in approximately 3-5% of first-time pregnancies and is a well-known leading cause of maternal and neonatal mortality and morbidity. In recent years, there has been accumulating evidence that in utero exposure to PE acts as an environmental risk factor for various neurodevelopmental disorders, particularly autism spectrum disorder and ADHD. At present, the mechanism(s) mediating this relationship are uncertain. In this review, we outline the most recent evidence implicating a causal role for PE exposure in the aetiology of various neurodevelopmental disorders and provide a novel interpretation of neuroanatomical alterations in PE-exposed offspring and how these relate to their sub-optimal neurodevelopmental trajectory. We then postulate that inflammation and oxidative stress, two prominent features of the pathophysiology of PE, are likely to play a major role in mediating this association. The increased inflammation in the maternal circulation, placenta and fetal circulation in PE expose the offspring to both prenatal maternal immune activation-a risk factor for neurodevelopmental disorders, which has been well-characterised in animal models-and directly higher concentrations of pro-inflammatory cytokines, which adversely affect neuronal development. Similarly, the exaggerated oxidative stress in the mother, placenta and foetus induces the placenta to secrete factors deleterious to neurons, and exposes the fetal brain to directly elevated oxidative stress and thus adversely affects neurodevelopmental processes. Finally, we describe the interplay between inflammation and oxidative stress in PE, and how both systems interact to potentially alter neurodevelopmental trajectory in exposed offspring.
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Affiliation(s)
- Aaron Barron
- Department of Anatomy and Neuroscience, University College, Cork, Ireland.,Department of Pharmacology and Therapeutics, University College Cork, Cork, Ireland
| | - Cathal M McCarthy
- Department of Pharmacology and Therapeutics, University College Cork, Cork, Ireland.
| | - Gerard W O'Keeffe
- Department of Anatomy and Neuroscience, University College, Cork, Ireland. .,Cork Neuroscience Centre, University College Cork, Cork, Ireland.
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17
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Zhang SH, Guo AJ, Wei N, Zhang R, Niu YJ. Associations of urinary dichloroacetic acid and trichloroacetic acid exposure with platelet indices: Exploring the mediating role of blood pressure in the general population. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123452. [PMID: 32688193 DOI: 10.1016/j.jhazmat.2020.123452] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Human exposure to drinking water disinfection by-products (DBPs) is potentially linked to high blood pressure (BP), which may be associated with abnormal platelet activation. This study investigated whether the relationship between DBP exposure with platelet change was mediated by BP. DBP biomarkers, such as urinary dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA), BP and platelet indices from 505 adults from a hospital in Shijiazhuang, China were measured. The cross-sectional associations among DCAA and TCAA exposure, BP and platelet indices were explored through multivariable linear regressions, and the mediation effect of BP was evaluated using the Sobel-Goodman test. We observed that DCAA and TCAA were positively associated with systolic BP (all p for trends < 0.01), which was positively associated with platelet count (PLC) (p for trend < 0.05). Mediation analysis indicated that systolic BP fully mediated the associations of DCAA and TCAA with PLC. When BP was controlled, a previously inverse significant relation between DCAA and platelet distribution width (PDW) remained significant (p < 0.05). Obtained results suggested that exposure to DCAA may contribute to decreased PDW in humans. Systolic BP is a possible mediator of the association between DCAA exposure and PLC. TCAA may indirectly positively affect PLC by increasing systolic BP.
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Affiliation(s)
- Shao-Hui Zhang
- Department of Occupational Health and Environmental Health, Hebei Medical University, Shijiazhuang, Hebei, PR China; Medical General Laboratory, the Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, PR China
| | - Ai-Jing Guo
- Department of Physico-chemical Inspection, Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang, Hebei, PR China
| | - Ning Wei
- Medical General Laboratory, the Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, PR China
| | - Rong Zhang
- Department of Occupational Health and Environmental Health, Hebei Medical University, Shijiazhuang, Hebei, PR China; Hebei Key Laboratory of Environment and Human Health, Shijiazhuang, Hebei, PR China
| | - Yu-Jie Niu
- Department of Occupational Health and Environmental Health, Hebei Medical University, Shijiazhuang, Hebei, PR China; Hebei Key Laboratory of Environment and Human Health, Shijiazhuang, Hebei, PR China.
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18
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Huang Y, Jiang B, Xia Y, Wang J, Ji C, Tong J, Chen T, Jiang Y. Downregulation of miR-133a contributes to the cardiac developmental toxicity of trichloroethylene in zebrafish. CHEMOSPHERE 2020; 251:126610. [PMID: 32443250 DOI: 10.1016/j.chemosphere.2020.126610] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/21/2020] [Accepted: 03/23/2020] [Indexed: 06/11/2023]
Abstract
Trichloroethylene (TCE), a widely used organic solvent, is a common environmental pollutant. Increasing evidence indicates that maternal TCE exposure is associated with congenital cardiac defects, but the underlining mechanisms remain largely unknown. In this study, we revealed that TCE exposure significantly induced heart defects and dysfunctions in zebrafish embryos. Heart tissues were dissected and subjected to high throughput sequencing and qPCR to identify differentially expressed miRNAs and mRNAs. The effects of miRNA were further verified by microinjection of antagomir or agomir. Reactive Oxygen Species (ROS) and cell proliferation were measured by using dichlorodihydrofluorescein diacetate (DCFH-DA) and EdU staining, respectively. Our results showed that 19 miRNAs were downregulated whereas 48 miRNAs were upregulated in the heart of zebrafish embryos. The downregulation of miR-133a and the upregulation of miR-182 were further validated. Moreover, we found that miR-133a agomir significantly alleviated the TCE-induced heart defects while miR-133a antagomir mimicked the toxic effect of TCE on heart development. Furthermore, miR-133a agomir significantly counteracted TCE-induced ROS production and excessive cell proliferation in the heart of zebrafish embryos. In conclusion, our results indicate that miR-133a mediates TCE-induced ROS generation, leading to excessive cell proliferation and heart defects.
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Affiliation(s)
- Yujie Huang
- Medical College of Soochow University, Suzhou, China
| | - Bin Jiang
- Medical College of Soochow University, Suzhou, China
| | - Ying Xia
- Medical College of Soochow University, Suzhou, China
| | - Jin Wang
- Medical College of Soochow University, Suzhou, China
| | - Cheng Ji
- Medical College of Soochow University, Suzhou, China
| | - Jian Tong
- Medical College of Soochow University, Suzhou, China; Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China
| | - Tao Chen
- Medical College of Soochow University, Suzhou, China; Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China.
| | - Yan Jiang
- Medical College of Soochow University, Suzhou, China; Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China.
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19
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Loch-Caruso R, Korte CS, Hogan KA, Liao S, Harris C. Tert-Butyl Hydroperoxide Stimulated Apoptosis Independent of Prostaglandin E 2 and IL-6 in the HTR-8/SVneo Human Placental Cell Line. Reprod Sci 2020; 27:2104-2114. [PMID: 32542535 DOI: 10.1007/s43032-020-00231-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 05/10/2020] [Accepted: 06/03/2020] [Indexed: 01/05/2023]
Abstract
Significant gaps exist in our knowledge of how cellular redox status, sometimes referred to as oxidative stress, impacts placental trophoblasts. The present study used tert-butyl hydroperoxide (TBHP) as a known generator of reactive oxygen species (ROS) in the extravillous trophoblast cell line HTR-8/SVneo to examine the role of cellular redox disruption of prostaglandin E2 (PGE2) and the cytokine IL-6 in cell death. Cells were exposed to 0, 12.5, 25, or 50 μM TBHP for 4, 8, and 24 h to ascertain effects on cell viability, caspase 3/7 activity, PGE2 release, PTGS2 mRNA expression, and IL-6 release. Experiments with inhibitors included the cyclooxygenase inhibitor indomethacin, mitogen-activated protein kinase inhibitors (PD169316, U0126, or SP600125), or treatments to counter expected consequences of TBHP-stimulated generation of ROS (deferoxamine [DFO], butylated hydroxyanisole [BHA], and N,N'-diphenyl-1,4-phenylenediamine [DPPD]) using 24-h exposure to 50 μM TBHP. Cell viability, measured by ATP content, decreased 24% relative to controls with a 24-h exposure to 50 μM TBHP, but not at lower TBHP concentrations nor at earlier time points. Exposure to 50 μM TBHP increased caspase 3/7 activity, an indicator of apoptosis, after 8 and 24 h. Antioxidant treatment markedly reduced TBHP-stimulated caspase 3/7 activity, PGE2 release, and IL-6 release. TBHP-stimulated IL-6 release was blocked by PD169316 but unaltered by indomethacin. These data suggest that TBHP-stimulated IL-6 release and caspase 3/7 activation were independent of PGE2 yet were interrupted by treatments with known antioxidant properties, providing new insight into relationships between PGE2, IL-6, and apoptosis under conditions of chemically induced cellular oxidation.
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Affiliation(s)
- Rita Loch-Caruso
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, 48109-2029, USA.
| | - Cassandra S Korte
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, 48109-2029, USA.,College of Arts and Sciences, Lynn University, Boca Raton, FL, 33431, USA
| | - Kelly A Hogan
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, 48109-2029, USA.,Mayo Clinic, Rochester, MN, 55905, USA
| | - Sarah Liao
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, 48109-2029, USA.,Ardent Mills LCC, Denver, CO, 80202, USA
| | - Craig Harris
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, 48109-2029, USA
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20
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Miller CN, Stewart EJ, Snow SJ, Williams WC, Richards JH, Thompson LC, Schladweiler MC, Farraj AK, Kodavanti UP, Dye JA. Ozone Exposure During Implantation Increases Serum Bioactivity in HTR-8/SVneo Trophoblasts. Toxicol Sci 2020; 168:535-550. [PMID: 30649513 DOI: 10.1093/toxsci/kfz003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Implantation is a sensitive window in reproductive development during which disruptions may increase the risk of adverse pregnancy outcomes including intrauterine growth restriction. Ozone exposure during implantation in rats reduces fetal weight near the end of gestation, potentially though impaired trophoblast migration and invasion and altered implantation. The current study characterized changes in ventilation, pulmonary injury, and circulating factors including hormonal, inflammatory, and metabolic markers related to exposure to ozone (0.4-1.2 ppm) for 4-h on gestation days 5 and 6 (window of implantation) in Long-Evans dams. To determine the effects of this exposure on trophoblast function, placental-derived, first trimester, HTR-8/SVneo cells were exposed to serum from air- or ozone (0.8 ppm×4 h)-exposed dams and examined for impacts on metabolic capacity, wound-closure, and invasion. Peri-implantation exposure to ozone induced ventilatory dysfunction and lung vascular leakage in pregnant rats, with little effect on most of the circulating markers measured. However, ozone inhalation induced a significant reduction in several serum cytokines (interferon-γ, interleukin-6, and interleukin-13). Treatment of HTR-8/SVneo trophoblasts with serum from ozone-exposed dams for 16-h downregulated metabolic capacity, wound-closure, and invasion through a Matrigel membrane compared with both air-serum and fetal bovine serum-treated cells. Ozone-serum treated cells increased the release of a critical inhibitor of invasion and angiogenesis (soluble fms-like receptor 1; sFlt1) compared with air-serum treatment. Together, our data suggest that circulating factors in the serum of pregnant rats exposed to ozone during implantation receptivity can hinder critical processes of implantation (eg, invasion and migration) and impair trophoblast metabolic capacity.
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Affiliation(s)
- Colette N Miller
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
| | - Erica J Stewart
- Oak Ridge Institute for Science and Education, Research Triangle Park, North Carolina 27711
| | - Samantha J Snow
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
| | - Wanda C Williams
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
| | - Judy H Richards
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
| | - Leslie C Thompson
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
| | - Mette C Schladweiler
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
| | - Aimen K Farraj
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
| | - Urmila P Kodavanti
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
| | - Janice A Dye
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711
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21
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Elkin ER, Harris SM, Su AL, Lash LH, Loch-Caruso R. Placenta as a target of trichloroethylene toxicity. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:472-486. [PMID: 32022077 PMCID: PMC7103546 DOI: 10.1039/c9em00537d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Trichloroethylene (TCE) is an industrial solvent and a common environmental contaminant detected in thousands of hazardous waste sites. Risk of exposure is a concern for workers in occupations that use TCE as well as for residents who live near industries that use TCE or who live near TCE-contaminated sites. Although renal, hepatic and carcinogenic effects of TCE have been documented, less is known about TCE impacts on reproductive functions despite epidemiology reports associating maternal TCE exposure with adverse pregnancy outcomes. Toxicological evidence suggests that the placenta mediates at least some of the adverse pregnancy outcomes associated with TCE exposure. Toxicology studies show that the TCE metabolite, S-(1,2-dichlorovinyl)-l-cysteine (DCVC) generates toxic effects such as mitochondrial dysfunction, apoptosis, oxidative stress, and release of prostaglandins and pro-inflammatory cytokines in placental cell lines. Each of these mechanisms of toxicity have significant implications for placental functions and, thus, ultimately the health of mother and developing child. Despite these findings there remain significant gaps in our knowledge about effects of TCE on the placenta, including effects on specific placental cell types and functions as well as sex differences in response to TCE exposure. Due to the critical role that the placenta plays in pregnancy, future research addressing some of these knowledge gaps could lead to significant gains in public health.
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Affiliation(s)
- Elana R Elkin
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI 48109-2029, USA.
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22
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Elkin ER, Bridges D, Harris SM, Loch-Caruso RK. Exposure to Trichloroethylene Metabolite S-(1,2-Dichlorovinyl)-L-cysteine Causes Compensatory Changes to Macronutrient Utilization and Energy Metabolism in Placental HTR-8/SVneo Cells. Chem Res Toxicol 2020; 33:1339-1355. [PMID: 31951115 PMCID: PMC7299793 DOI: 10.1021/acs.chemrestox.9b00356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
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Trichloroethylene
(TCE) is a widespread environmental contaminant
following decades of use as an industrial solvent, improper disposal,
and remediation challenges. Consequently, TCE exposure continues to
constitute a risk to human health. Despite epidemiological evidence
associating exposure with adverse birth outcomes, the effects of TCE
and its metabolite S-(1, 2-dichlorovinyl)-L-cysteine
(DCVC) on the placenta remain undetermined. Flexible and efficient
macronutrient and energy metabolism pathway utilization is essential
for placental cell physiological adaptability. Because DCVC is known
to compromise cellular energy status and disrupt energy metabolism
in renal proximal tubular cells, this study investigated the effects
of DCVC on cellular energy status and energy metabolism pathways in
placental cells. Human extravillous trophoblast cells, HTR-8/SVneo,
were exposed to 5–20 μM DCVC for 6 or 12 h. After establishing
concentration and exposure duration thresholds for DCVC-induced cytotoxicity,
targeted metabolomics was used to evaluate overall energy status and
metabolite concentrations from energy metabolism pathways. The data
revealed glucose metabolism perturbations including a time-dependent
accumulation of glucose-6-phosphate+frutose-6-phosphate (G6P+F6P)
as well as independent shunting of glucose intermediates that diminished
with time, with modest energy status decline but in the absence of
significant changes in ATP concentrations. Furthermore, metabolic
profiling suggested that DCVC stimulated compensatory utilization
of glycerol, lipid, and amino acid metabolism to provide intermediate
substrates entering downstream in the glycolytic pathway or the tricarboxylic
acid cycle. Lastly, amino acid deprivation increased susceptibility
to DCVC-induced cytotoxicity. Taken together, these results suggest
that DCVC caused metabolic perturbations necessitating adaptations
in macronutrient and energy metabolism pathway utilization to maintain
adequate ATP levels.
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Affiliation(s)
- Elana R Elkin
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109-2029, United States
| | - Dave Bridges
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan 48109-2029, United States
| | - Sean M Harris
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109-2029, United States
| | - Rita Karen Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109-2029, United States
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23
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Elkin ER, Bridges D, Loch-Caruso R. The trichloroethylene metabolite S-(1,2-dichlorovinyl)-L-cysteine induces progressive mitochondrial dysfunction in HTR-8/SVneo trophoblasts. Toxicology 2019; 427:152283. [PMID: 31476333 DOI: 10.1016/j.tox.2019.152283] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 08/24/2019] [Accepted: 08/28/2019] [Indexed: 02/08/2023]
Abstract
Trichloroethylene is an industrial solvent and common environmental pollutant. Despite efforts to ban trichloroethylene, its availability and usage persist globally, constituting a hazard to human health. Recent studies reported associations between maternal trichloroethylene exposure and increased risk for low birth weight. Despite these associations, the toxicological mechanism underlying trichloroethylene adverse effects on pregnancy remains largely unknown. The trichloroethylene metabolite S-(1,2-dichlorovinyl)-L-cysteine (DCVC) induces mitochondrial-mediated apoptosis in a trophoblast cell line. To gain further understanding of mitochondrial-mediated DCVC placental toxicity, this study investigated the effects of DCVC exposure on mitochondrial function using non-cytolethal concentrations in placental cells. Human trophoblasts, HTR-8/SVneo, were exposed in vitro to a maximum of 20 μM DCVC for up to 12 h. Cell-based oxygen consumption and extracellular acidification assays were used to evaluate key aspects of mitochondrial function. Following 6 h of exposure to 20 μM DCVC, elevated oxygen consumption, mitochondrial proton leak and sustained energy coupling deficiency were observed. Similarly, 12 h of exposure to 20 μM DCVC decreased mitochondrial-dependent basal, ATP-linked and maximum oxygen consumption rates. Using the fluorochrome TMRE, dissipation of mitochondrial membrane potential was detected after a 12-h exposure to 20 μM DCVC, and (±)-α-tocopherol, a known suppressor of lipid peroxidation, attenuated DCVC-stimulated mitochondrial membrane depolarization but failed to rescue oxygen consumption perturbations. Together, these results suggest that DCVC caused progressive mitochondrial dysfunction, resulting in lipid peroxidation-associated mitochondrial membrane depolarization. Our findings contribute to the biological plausibility of DCVC-induced placental impairment and provide new insights into the role of the mitochondria in DCVC-induced toxicity.
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Affiliation(s)
- Elana R Elkin
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA.
| | - Dave Bridges
- Department of Nutritional Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA.
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA.
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24
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New Insights into the Process of Placentation and the Role of Oxidative Uterine Microenvironment. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:9174521. [PMID: 31341539 PMCID: PMC6615000 DOI: 10.1155/2019/9174521] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/28/2019] [Indexed: 12/18/2022]
Abstract
For a successful pregnancy to occur, a predecidualized receptive endometrium must be invaded by placental differentiated cells (extravillous trophoblast cells (EVTs)) and, at the same time, continue decidualization. EVT invasion is aimed at anchoring the placenta to the maternal uterus and ensuring local blood supply increase necessary to provide normal placental and foetal development. The first is achieved by migrating through the maternal endometrium and deeper into the myometrium, while the second by transforming uterine spiral arteries into large vessels. This process is a tightly regulated battle comprising interests of both the mother and the foetus. Invading EVTs are required to perform a scope of functions: move, adhere, proliferate, differentiate, interact, and digest the extracellular matrix (ECM); tolerate hypoxia; transform the maternal spiral arteries; and die by apoptosis. All these functions are modulated by their surrounding microenvironment: oxygen, soluble factors (e.g., cytokines, growth factors, and hormones), ECM proteins, and reactive oxygen species. A deeper comprehension of oxidative uterine microenvironment contribution to trophoblast function will be addressed in this review.
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25
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Surico D, Bordino V, Cantaluppi V, Mary D, Gentilli S, Oldani A, Farruggio S, Melluzza C, Raina G, Grossini E. Preeclampsia and intrauterine growth restriction: Role of human umbilical cord mesenchymal stem cells-trophoblast cross-talk. PLoS One 2019; 14:e0218437. [PMID: 31206561 PMCID: PMC6576763 DOI: 10.1371/journal.pone.0218437] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 06/02/2019] [Indexed: 12/27/2022] Open
Abstract
Background Oxidative stress is involved in the pathogenesis and maintenance of pregnancy-related disorders, such as intrauterine growth restriction (IUGR) and preeclampsia (PE). Human umbilical cord mesenchymal stem cells (hUMSCs) have been suggested as a possible therapeutic tool for the treatment of pregnancy-related disorders in view of their paracrine actions on trophoblast cells. Objectives To quantify the plasma markers of peroxidation in patients affected by PE and IUGR and to examine the role of oxidative stress in the pathophysiology of PE and IUGR in vitro by using hUMSCs from physiological and pathological pregnancies and a trophoblast cell line (HTR-8/SVneo). Study design In pathological and physiological pregnancies the plasma markers of oxidative stress, arterial blood pressure, serum uric acid, 24h proteinuria, weight gain and body mass index (BMI) were examined. Furthermore, the pulsatility index (PI) of uterine and umbilical arteries, and of fetal middle cerebral artery was measured. In vitro, the different responses of hUMSCs, taken from physiological and pathological pregnancies, and of HTR-8/SVneo to pregnancy-related hormones in terms of viability and nitric oxide (NO) release were investigated. In some experiments, the above measurements were performed on co-cultures between HTR-8/SVneo and hUMSCs. Results The results obtained have shown that in pathological pregnancies, body mass index, serum acid uric, pulsatility index in uterine and umbilical arteries and markers of oxidative stress were higher than those found in physiological ones. Moreover, in PE and IUGR, a relation was observed between laboratory and clinical findings and the increased levels of oxidative stress. HTR-8/SVneo and hUMSCs showed reduced viability and increased NO production when stressed with H2O2. Finally, HTR-8/SVneo cultured in cross-talk with hUMSCs from pathological pregnancies showed a deterioration of cell viability and NO release when treated with pregnancy-related hormones. Conclusion Our findings support that hUMSCs taken from patients affected by PE and IUGR have significant features in comparison with those from physiologic pregnancies. Moreover, the cross-talk between hUMSCs and trophoblast cells might be involved in the etiopathology of IUGR and PE secondary to oxidative stress.
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Affiliation(s)
- Daniela Surico
- Department of Translational Medicine, Gynecologic Unit, University East Piedmont, Azienda Ospedaliera Universitaria Maggiore della Carità, Novara, Italy
- Department of Translational Medicine, AGING PROJECT, University East Piedmont, Novara, Italy
| | - Valerio Bordino
- Department of Translational Medicine, Gynecologic Unit, University East Piedmont, Azienda Ospedaliera Universitaria Maggiore della Carità, Novara, Italy
| | - Vincenzo Cantaluppi
- Department of Translational Medicine, AGING PROJECT, University East Piedmont, Novara, Italy
- Department of Translational Medicine, Nephrology-Kidney Transplantation Unit and Center for Autoimmune and Allergic Diseases (CAAD), University East Piedmont, Azienda Ospedaliera Universitaria Maggiore della Carità, Novara, Italy
| | - David Mary
- Department of Translational Medicine, Laboratory of Physiology/Experimental Surgery, University East Piedmont, Novara, Italy
| | - Sergio Gentilli
- Department of Translational Medicine, Laboratory of Physiology/Experimental Surgery, University East Piedmont, Novara, Italy
| | - Alberto Oldani
- Department of Translational Medicine, Laboratory of Physiology/Experimental Surgery, University East Piedmont, Novara, Italy
| | - Serena Farruggio
- Department of Translational Medicine, AGING PROJECT, University East Piedmont, Novara, Italy
- Department of Translational Medicine, Laboratory of Physiology/Experimental Surgery, University East Piedmont, Novara, Italy
| | - Carmela Melluzza
- Department of Translational Medicine, Gynecologic Unit, University East Piedmont, Azienda Ospedaliera Universitaria Maggiore della Carità, Novara, Italy
| | - Giulia Raina
- Department of Translational Medicine, AGING PROJECT, University East Piedmont, Novara, Italy
- Department of Translational Medicine, Laboratory of Physiology/Experimental Surgery, University East Piedmont, Novara, Italy
| | - Elena Grossini
- Department of Translational Medicine, AGING PROJECT, University East Piedmont, Novara, Italy
- Department of Translational Medicine, Laboratory of Physiology/Experimental Surgery, University East Piedmont, Novara, Italy
- * E-mail:
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26
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Loch-Caruso R, Hassan I, Harris SM, Kumar A, Bjork F, Lash LH. Trichloroethylene exposure in mid-pregnancy decreased fetal weight and increased placental markers of oxidative stress in rats. Reprod Toxicol 2018; 83:38-45. [PMID: 30468822 DOI: 10.1016/j.reprotox.2018.11.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 11/09/2018] [Accepted: 11/19/2018] [Indexed: 12/29/2022]
Abstract
Although epidemiology studies have associated maternal trichloroethylene (TCE) exposure with decreased birth weight and preterm birth, mechanistic explanations for these associations are currently lacking. We hypothesized that TCE targets the placenta with adverse consequences for pregnancy outcomes. Pregnant Wistar rats were exposed orally to vehicle or 480 mg TCE/kg body weight from gestational days (gd) 6-16, and tissues were collected on gd 16. Exposure to TCE significantly decreased average fetal weight without reducing maternal weight. In placenta, TCE significantly increased 8-hydroxy-deoxyguanosine, global 5-hydroxymethylcytosine, and mRNA expression of Tet3, which codes for an enzyme involved in 5-hydroxymethylcytosine formation. Furthermore, glutathione S-transferase activity and immunohistochemical staining were increased in placentas of TCE-exposed rats. The present study provides the first evidence that TCE increases markers of oxidative stress in placenta in a fetal growth restriction rat model, providing new insight into the placenta as a potentially relevant target for TCE-induced adverse pregnancy outcomes.
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Affiliation(s)
- Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, 48109-2029, USA.
| | - Iman Hassan
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, 48109-2029, USA.
| | - Sean M Harris
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, 48109-2029, USA.
| | - Anjana Kumar
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, 48109-2029, USA.
| | - Faith Bjork
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, 48109-2029, USA.
| | - Lawrence H Lash
- Department of Pharmacology, Wayne State University School of Medicine, 540 East Canfield Avenue, Detroit, MI, 48201, USA.
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27
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Oxidative Stress in Preeclampsia and Placental Diseases. Int J Mol Sci 2018; 19:ijms19051496. [PMID: 29772777 PMCID: PMC5983711 DOI: 10.3390/ijms19051496] [Citation(s) in RCA: 318] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/09/2018] [Accepted: 05/11/2018] [Indexed: 02/07/2023] Open
Abstract
Preeclampsia is a persistent hypertensive gestational disease characterized by high blood pressure and proteinuria, which presents from the second trimester of pregnancy. At the cellular level, preeclampsia has largely been associated with the release of free radicals by the placenta. Placenta-borne oxidative and nitrosative stresses are even sometimes considered as the major molecular determinants of the maternal disease. In this review, we present the recent literature evaluating free radical production in both normal and pathological placentas (including preeclampsia and other major pregnancy diseases), in humans and animal models. We then assess the putative effects of these free radicals on the placenta and maternal endothelium. This analysis was conducted with regard to recent papers and possible therapeutic avenues.
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28
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Elkin ER, Harris SM, Loch-Caruso R. Trichloroethylene metabolite S-(1,2-dichlorovinyl)-l-cysteine induces lipid peroxidation-associated apoptosis via the intrinsic and extrinsic apoptosis pathways in a first-trimester placental cell line. Toxicol Appl Pharmacol 2018; 338:30-42. [PMID: 29129777 PMCID: PMC5741094 DOI: 10.1016/j.taap.2017.11.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 11/07/2017] [Accepted: 11/08/2017] [Indexed: 12/31/2022]
Abstract
Trichloroethylene (TCE), a prevalent environmental contaminant, is a potent renal and hepatic toxicant through metabolites such as S-(1, 2-dichlorovinyl)-l-cysteine (DCVC). However, effects of TCE on other target organs such as the placenta have been minimally explored. Because elevated apoptosis and lipid peroxidation in placenta have been observed in pregnancy morbidities involving poor placentation, we evaluated the effects of DCVC exposure on apoptosis and lipid peroxidation in a human extravillous trophoblast cell line, HTR-8/SVneo. We exposed the cells in vitro to 10-100μM DCVC for various time points up to 24h. Following exposure, we measured apoptosis using flow cytometry, caspase activity using luminescence assays, gene expression using qRT-PCR, and lipid peroxidation using a malondialdehyde quantification assay. DCVC significantly increased apoptosis in time- and concentration-dependent manners (p<0.05). DCVC also significantly stimulated caspase 3, 7, 8 and 9 activities after 12h (p<0.05), suggesting that DCVC stimulates the activation of both the intrinsic and extrinsic apoptotic signaling pathways simultaneously. Pre-treatment with the tBID inhibitor Bl-6C9 partially reduced DCVC-stimulated caspase 3 and 7 activity, signifying crosstalk between the two pathways. Additionally, DCVC treatment increased lipid peroxidation in a concentration-dependent manner. Co-treatment with the antioxidant peroxyl radical scavenger (±)-α-tocopherol attenuated caspase 3 and 7 activity, suggesting that lipid peroxidation mediates DCVC-induced apoptosis in extravillous trophoblasts. Our findings suggest that DCVC-induced apoptosis and lipid peroxidation in extravillous trophoblasts could contribute to poor placentation if similar effects occur in vivo in response to TCE exposure, indicating that further studies into this mechanism are warranted.
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Affiliation(s)
- Elana R Elkin
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
| | - Sean M Harris
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
| | - Rita Loch-Caruso
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA.
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29
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Rosen EM, Muñoz MI, McElrath T, Cantonwine DE, Ferguson KK. Environmental contaminants and preeclampsia: a systematic literature review. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2018; 21:291-319. [PMID: 30582407 PMCID: PMC6374047 DOI: 10.1080/10937404.2018.1554515] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Preeclampsia is a medical condition specific to pregnancy characterized by high blood pressure and protein in the woman's urine, indicating kidney damage. It is one of the most serious reproductive conditions, posing substantial risks to the baby and potentially fatal for the mother. The causes of preeclampsia are largely unknown and environmental contaminants merit further investigation. The aim of this review was to determine the association between environmental chemical exposures and preeclampsia. PubMed was searched for articles examining a priori chemical exposures and preeclampsia through April 2018. Studies were included in our review if they included at least 10 cases, evaluated preeclampsia independent of gestational hypertension, and used either measured or modeled exposure assessments. Our review contained 28 investigations examining persistent organic pollutants (POP) (6 studies), drinking water contaminants (1 study), atmospheric pollutants (11 studies), metals and metalloids (6 studies), and other environmental contaminants (4 studies). There were an insufficient number of investigations on most chemicals to draw definitive conclusions, but strong evidence existed for an association between preeclampsia and cadmium (Cd). There is suggestive evidence for associations between nitrogen dioxide (NO2), particulate matter (PM)2.5, and traffic exposure with preeclampsia. There is evidence for an association between preeclampsia and Cd but insufficient literature to evaluate many other environmental chemicals. Additional studies using repeated measures, appropriate biological matrices, and mixtures methods are needed to expand this area of research and address the limitations of previous studies.
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Affiliation(s)
- Emma M Rosen
- a Epidemiology Branch , National Institute of Environmental Health Sciences, Research Triangle Park , NC , USA
| | - Mg Isabel Muñoz
- a Epidemiology Branch , National Institute of Environmental Health Sciences, Research Triangle Park , NC , USA
| | - Thomas McElrath
- b Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology , Brigham and Women's Hospital , Boston , MA , USA
| | - David E Cantonwine
- b Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology , Brigham and Women's Hospital , Boston , MA , USA
| | - Kelly K Ferguson
- a Epidemiology Branch , National Institute of Environmental Health Sciences, Research Triangle Park , NC , USA
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