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Chen J, Su Y, Lin F, Iqbal M, Mehmood K, Zhang H, Shi D. Effect of paraquat on cytotoxicity involved in oxidative stress and inflammatory reaction: A review of mechanisms and ecological implications. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 224:112711. [PMID: 34455184 DOI: 10.1016/j.ecoenv.2021.112711] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/07/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
Paraquat (PQ) is a cheap and an effective herbicide, which is widely being used worldwide to remove weeds in cultivated crop fields. However, it can cause soil and water pollution, and pose serious harm to the environment and organisms. Several countries have started to limit or prohibit the use of PQ because of the increasing number of human deaths. Its toxicity can damage the organisms with a multi-target mechanism, which has not been fully understood yet. That is why it is hard to treat as well. The current research on PQ focuses on its targeted organ, the lungs, in which PQ mostly trigger pulmonary fibrosis. While there is a lack of systematic research, there are few studies published discussing its toxic effects at systematic level. This review summarizes the major damages caused by PQ in different organisms and partial mechanisms by which it causes these damages. For this purpose, we consulted several research articles that studied the toxicity of PQ in various tissues. We also listed some drugs that can be used to alleviate the toxicity of PQ. However, at present, the effectiveness of these drugs is still being explored in animal experiments and the study of their mechanism will also help in understanding the poisoning mechanism of PQ, which will ultimately lead to effective treatment in future.
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Affiliation(s)
- Jiaxin Chen
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Yalin Su
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Fei Lin
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Mujahid Iqbal
- Department of Pathology, Cholistan University of Veterinary and Animal Sciences (CUVAS), Bahawalpur 63100, Pakistan
| | - Khalid Mehmood
- Department of Clinical Medicine and Surgery, Faculty of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, 63100, Pakistan
| | - Hui Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Dayou Shi
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
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2
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Lv B, Han DF, Chen J, Zhao HB, Liu XL. Can kissing cause paraquat poisoning: A case report and review of literature. World J Clin Cases 2021; 9:5588-5593. [PMID: 34307613 PMCID: PMC8281437 DOI: 10.12998/wjcc.v9.i20.5588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 05/07/2021] [Accepted: 05/20/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Paraquat is an effective, broad-spectrum, highly toxic quaternary ammonium herbicide. Paraquat poisoning has been reported frequently in recent years. It has severe lung, kidney, liver, and nervous system toxicity, and there is currently no specific antidote. Paraquat poisoning may follow ingestion, inhalation, and skin contact. There have been no previous reports of paraquat poisoning that resulted from kissing. This rare case provides a new reference for the prevention of paraquat poisoning.
CASE SUMMARY A 27-year-old man came to the emergency department complaining that he had come into contact with paraquat by kissing his girlfriend, who had taken 80-120 mL 20% paraquat. After admission, his lung computed tomography (CT) showed increased lung markings. Redness and a burning sensation developed on his tongue, which progressed to painful erosions and coalescent ulcers. The final diagnosis was mild paraquat poisoning. Anti-inflammatory, antioxidant, and symptomatic treatment were initiated and continued for 7 d. Dyspnea did not occur, subsequent lung CT showed no significant changes, and the tongue pain was slightly improved. One month after discharge, the tongue injury was resolved.
CONCLUSION This case indicated that the tongue and lung tissues are particularly vulnerable to paraquat toxicity, even after a limited exposure.
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Affiliation(s)
- Bing Lv
- Emergency Department, First Hospital of Jilin University, Changchun 130000, Jilin Province, China
| | - Dong-Feng Han
- Emergency Department, First Hospital of Jilin University, Changchun 130000, Jilin Province, China
| | - Jing Chen
- Department of Endocrinology and Nephrology, Central Hospital of Tonghua, Tonghua 134000, Jilin Province, China
| | - Hai-Bin Zhao
- Department of Endocrinology and Nephrology, Central Hospital of Tonghua, Tonghua 134000, Jilin Province, China
| | - Xiao-Liang Liu
- Emergency Department, First Hospital of Jilin University, Changchun 130000, Jilin Province, China
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Stevens AJ, Campbell JL, Travis KZ, Clewell HJ, Hinderliter PM, Botham PA, Cook AR, Minnema DJ, Wolf DC. Paraquat pharmacokinetics in primates and extrapolation to humans. Toxicol Appl Pharmacol 2021; 417:115463. [PMID: 33631232 DOI: 10.1016/j.taap.2021.115463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 02/12/2021] [Accepted: 02/14/2021] [Indexed: 11/28/2022]
Abstract
By extending our Paraquat (PQ) work to include primates we have implemented a modelling and simulation strategy that has enabled PQ pharmacokinetic data to be integrated into a single physiologically based pharmacokinetic (PBPK) model that enables more confident extrapolation to humans. Because available data suggested there might be differences in PQ kinetics between primates and non-primates, a radiolabelled study was conducted to characterize pharmacokinetics and excretion in Cynomolgus monkeys. Following single intravenous doses of 0.01 or 0.1 mg paraquat dichloride/kg bw, plasma PQ concentration-time profiles were dose-proportional. Excretion up to 48 h (predominantly urinary) was 82.9%, with ca. 10% remaining unexcreted. In vitro blood binding was similar across Cynomolgus monkeys, humans and rat. Our PBPK model for the rat, mouse and dog, employing a single set of PQ-specific parameters, was scaled to Cynomolgus monkeys and well represented the measured plasma concentration-time profiles over 14 days. Addition of a cartilage compartment to the model better captured the percent remaining in the monkeys at 48 h, whilst having negligible effect on model predictions for the other species. The PBPK model performed well for all four species, demonstrating there is little difference in PQ kinetics between non-primates and primates enabling a more confident extrapolation to humans. Scaling of the PBPK model to humans, with addition of a human-specific dermal submodel based on in vitro human dermal absorption data, provides a valuable tool that could be employed in defining internal dosimetry to complement human health risk assessments.
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Affiliation(s)
- Alexander J Stevens
- Syngenta Ltd, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, UK.
| | - Jerry L Campbell
- Ramboll Environment and Health Consulting, 3214 Charles B. Root Wynd Suite 130, Raleigh, NC 27612, USA.
| | - Kim Z Travis
- Syngenta Ltd, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, UK.
| | - Harvey J Clewell
- Ramboll Environment and Health Consulting, 3214 Charles B. Root Wynd Suite 130, Raleigh, NC 27612, USA.
| | | | - Philip A Botham
- Syngenta Ltd, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, UK.
| | - Andrew R Cook
- Syngenta Ltd, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, UK.
| | - Daniel J Minnema
- Syngenta Crop Protection LLC, P.O. Box 18300, Greensboro, NC, USA.
| | - Douglas C Wolf
- Syngenta Crop Protection LLC, Research Triangle Park, NC 27709, USA.
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Umezu T, Sano T, Hayashi J, Shibata Y. Simultaneous blood and brain microdialysis in a free-moving mouse to test blood-brain barrier permeability of chemicals. Toxicol Rep 2020; 7:1542-1550. [PMID: 33294385 PMCID: PMC7689036 DOI: 10.1016/j.toxrep.2020.10.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 09/30/2020] [Accepted: 10/29/2020] [Indexed: 01/27/2023] Open
Abstract
Neurotoxic chemicals that pass through the blood-brain barrier (BBB) can influence brain function. Efficient methods to test the permeability of the BBB to specific chemicals would facilitate identification of potentially neurotoxic agents. We report here a simultaneous blood and brain microdialysis in a free-moving mouse to test BBB permeability of different chemicals. Microdialysis sampling was conducted in mice at 3-5 days after implantation of a brain microdialysis probe and 1 day after implantation of a blood microdialysis probe. Therefore, mice were under almost physiological conditions. Results of an intravenous injection of lucifer yellow or uranine showed that the BBB was functioning in the mice under the experimental conditions. Mice were given phenyl arsenic compounds orally, and concentration-time profiles for phenyl arsenic compounds such as diphenylarsinic acid, phenylarsonic acid, and phenylmethylarsinic acid in the blood and brain dialysate samples were obtained using simultaneous blood and brain microdialysis coupled with liquid chromatography-tandem mass spectrometry. Peak area-time profiles for linalool and 2-phenethyl alcohol (fragrance compounds or plant-derived volatile organic chemicals) were obtained using simultaneous blood and brain microdialysis coupled with gas chromatography-mass spectrometry in mice given lavender or rose essential oils intraperitoneally. BBB function was confirmed using lucifer yellow in these mice, and results indicated that the phenyl arsenic compounds, linalool and 2-phenethyl alcohol, passed through the BBB. The present study demonstrates that simultaneous blood and brain microdialysis in a free-moving mouse makes it possible to test the BBB permeability of chemicals when coupled with appropriate chemical analysis methods.
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Affiliation(s)
- Toyoshi Umezu
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Tomoharu Sano
- Center for Environmental Measurement and Analysis, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Junko Hayashi
- Center for Environmental Measurement and Analysis, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Yasuyuki Shibata
- Center for Environmental Measurement and Analysis, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
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Chaves C, Campanelli F, Chapy H, Gomez-Zepeda D, Glacial F, Smirnova M, Taghi M, Pallud J, Perrière N, Declèves X, Menet MC, Cisternino S. An Interspecies Molecular and Functional Study of Organic Cation Transporters at the Blood-Brain Barrier: From Rodents to Humans. Pharmaceutics 2020; 12:pharmaceutics12040308. [PMID: 32231079 PMCID: PMC7238036 DOI: 10.3390/pharmaceutics12040308] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/16/2020] [Accepted: 03/25/2020] [Indexed: 01/11/2023] Open
Abstract
Organic cation transporters (OCTs) participate in the handling of compounds in kidneys and at the synaptic cleft. Their role at the blood-brain barrier (BBB) in brain drug delivery is still unclear. The presence of OCT1,2,3 (SLC22A1-3) in mouse, rat and human isolated brain microvessels was investigated by either qRT-PCR, quantitative proteomics and/or functional studies. BBB transport of the prototypical substrate [3H]-1-methyl-4-phenylpyridinium ([3H]-MPP+) was measured by in situ brain perfusion in six mouse strains and in Sprague Dawley rats, in primary human brain microvascular endothelial cells seeded on inserts, in the presence or absence of OCTs and a MATE1 (SLC49A1) inhibitor. The results show negligible OCT1 (SLC22A1) and OCT2 (SLC22A2) expression in either mice, rat or human brain microvessels, while OCT3 expression was identified in rat microvessels by qRT-PCR. The in vitro human cellular uptake of [3H]-MPP+ was not modified by OCTs/MATE-inhibitor. Brain transport of [3H]-MPP+ remains unchanged between 2- and 6-month old mice, and no alteration was observed in mice and rats with inhibitors. In conclusion, the evidenced lack of expression and/or functional OCTs and MATE at the BBB allows the maintenance of the brain homeostasis and function as it prevents an easy access of their neurotoxicant substrates to the brain parenchyma.
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Affiliation(s)
- Catarina Chaves
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
| | - Federica Campanelli
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
| | - Hélène Chapy
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
| | - David Gomez-Zepeda
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
| | - Fabienne Glacial
- BrainPlotting SAS, Institut du Cerveau et de la Moelle épinière, 75013 Paris, France; (F.G.); (N.P.)
| | - Maria Smirnova
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
| | - Meryam Taghi
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
| | - Johan Pallud
- Department of Neurosurgery, Sainte Anne Hospital, 75014 Paris, France;
- Inserm, U894, IMA-Brain, Centre de Psychiatrie et Neurosciences, 75013 Paris, France
| | - Nicolas Perrière
- BrainPlotting SAS, Institut du Cerveau et de la Moelle épinière, 75013 Paris, France; (F.G.); (N.P.)
| | - Xavier Declèves
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
- Assistance Publique-Hôpitaux de Paris, AP-HP, Hôpital Universitaire Cochin, Biologie du médicament et toxicologie, 75006 Paris, France
| | - Marie-Claude Menet
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
- Assistance Publique-Hôpitaux de Paris, AP-HP, Hôpital Universitaire Cochin, Hormonologie adulte, 75006 Paris, France
| | - Salvatore Cisternino
- Inserm, U1144, Optimisation Thérapeutique en Neuropsychopharmacologie, 75006 Paris, France; (C.C.); (F.C.); (H.C.); (M.S.); (M.T.); (X.D.); (M.-C.M.)
- Faculté de pharmacie, Université de Paris, UMR-S 1144, 4, Avenue de l’Observatoire, 75006 Paris, France
- Assistance Publique-Hôpitaux de Paris, AP-HP, Hôpital Universitaire Necker-Enfants Malades, Service de pharmacie, 75015 Paris, France
- Correspondence: ; Tel.: +33-1-444-951-91
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Abstract
RATIONALE Despite the fact that treatment of paraquat poisoning in pregnant women and their fetuses is challenging and raises ethical issues, it is rarely reported in the literature. We report the case of a pregnant woman who took paraquat intentionally. PATIENT CONCERNS A 36-year-old woman at 38 weeks gestational age, in an apparent suicide attempt, drank 1 mouthful (about 20 ml) of paraquat solution. Ten hours later, her urine dithionate test showed light blue color with a plasma paraquat concentration of 0.547 μg/ml. Six hours after admission, a male infant, whose plasma paraquat concentration was 0.761 μg/ml, together with 0.673 μg/ml in the amniotic fluid measured by high-performance liquid chromatography, was delivered but the woman's lung, liver, and kidney function declined rapidly. DIAGNOSIS INTERVENTIONS:: Because of placenta previa and multiple organ failure, emergency cesarean section, and panhysterectomy were performed for the pregnant woman. Intravenous injection of antibiotic to prevent infection and dexamethasone 30 mg once a day were administered. Mechanical ventilation was performed for the infant and meropenem and penicillin injection was administered. OUTCOMES The infant died 33 hours after birth while the mother died on the 3rd day after ingestion. LESSONS Paraquat can enter the fetus through the placenta and the amniotic fluid via fluid exchange. The pathological changes of fetal organs may relate to gestational age, and the prognosis was very poor in both the mother and the fetus.
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Affiliation(s)
- Jianshi Chen
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, Shandong
- Department of Intensive Care Unite, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Xiangdong Jian
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, Shandong
| | - Guangcai Yu
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, Shandong
| | - Min Si
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, Shandong
| | - Baotian Kan
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, Shandong
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Paraquat Exposure of Pregnant Women and Neonates in Agricultural Areas in Thailand. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15061163. [PMID: 29865285 PMCID: PMC6025106 DOI: 10.3390/ijerph15061163] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 01/23/2023]
Abstract
This study aimed to assess paraquat concentrations in the urine of women at 28 weeks of pregnancy, delivery and 2 months postpartum and in the meconium of neonates. In all, 79 pregnant women were recruited from three hospitals located in agricultural areas in Thailand. The subjects were interviewed about personal characteristics, agricultural activities and pesticide use patterns. Paraquat was analyzed in urine and meconium using high performance liquid chromatography equipped with a fluorescence detector. The geometric mean (GSD) of urinary paraquat concentrations at 28 weeks of pregnancy, delivery and 2 months postpartum were 2.04 (4.22), 2.06 (5.04) and 2.42 (5.33) ng/mL, respectively. The urinary paraquat concentrations at 28 weeks of pregnancy, delivery and 2 months postpartum between agriculturist and non-agriculturist were not significantly different (p = 0.632, p = 0.915, p = 0.57, respectively). The geometric mean (GSD) of paraquat concentration in the meconium was 33.31 (4.59) ng/g. The factors predicting paraquat exposures among pregnant women and neonates included working outside, living near farmland, having family members who work on a farm, drinking well water and using herbicides or paraquat.
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Ren X, Zou L, Zhang X, Branco V, Wang J, Carvalho C, Holmgren A, Lu J. Redox Signaling Mediated by Thioredoxin and Glutathione Systems in the Central Nervous System. Antioxid Redox Signal 2017; 27:989-1010. [PMID: 28443683 PMCID: PMC5649126 DOI: 10.1089/ars.2016.6925] [Citation(s) in RCA: 205] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
SIGNIFICANCE The thioredoxin (Trx) and glutathione (GSH) systems play important roles in maintaining the redox balance in the brain, a tissue that is prone to oxidative stress due to its high-energy demand. These two disulfide reductase systems are active in various areas of the brain and are considered to be critical antioxidant systems in the central nervous system (CNS). Various neuronal disorders have been characterized to have imbalanced redox homeostasis. Recent Advances: In addition to their detrimental effects, recent studies have highlighted that reactive oxygen species/reactive nitrogen species (ROS/RNS) act as critical signaling molecules by modifying thiols in proteins. The Trx and GSH systems, which reversibly regulate thiol modifications, regulate redox signaling involved in various biological events in the CNS. CRITICAL ISSUES In this review, we focus on the following: (i) how ROS/RNS are produced and mediate signaling in CNS; (ii) how Trx and GSH systems regulate redox signaling by catalyzing reversible thiol modifications; (iii) how dysfunction of the Trx and GSH systems causes alterations of cellular redox signaling in human neuronal diseases; and (iv) the effects of certain small molecules that target thiol-based signaling pathways in the CNS. FUTURE DIRECTIONS Further study on the roles of thiol-dependent redox systems in the CNS will improve our understanding of the pathogenesis of many human neuronal disorders and also help to develop novel protective and therapeutic strategies against neuronal diseases. Antioxid. Redox Signal. 27, 989-1010.
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Affiliation(s)
- Xiaoyuan Ren
- 1 Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm, Sweden
| | - Lili Zou
- 1 Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm, Sweden .,2 Translational Neuroscience and Neural Regeneration and Repair Institute/Institute of Cell Therapy, The First Hospital of Yichang, Three Gorges University , Yichang, China
| | - Xu Zhang
- 1 Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm, Sweden
| | - Vasco Branco
- 3 Research Institute for Medicines (iMed.ULisboa) , Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Jun Wang
- 2 Translational Neuroscience and Neural Regeneration and Repair Institute/Institute of Cell Therapy, The First Hospital of Yichang, Three Gorges University , Yichang, China
| | - Cristina Carvalho
- 3 Research Institute for Medicines (iMed.ULisboa) , Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Arne Holmgren
- 1 Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet , Stockholm, Sweden
| | - Jun Lu
- 4 School of Pharmaceutical Sciences, Southwest University , Chongqing, China
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Metabolic Investigations of the Molecular Mechanisms Associated with Parkinson's Disease. Metabolites 2017; 7:metabo7020022. [PMID: 28538683 PMCID: PMC5487993 DOI: 10.3390/metabo7020022] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 05/16/2017] [Accepted: 05/16/2017] [Indexed: 12/20/2022] Open
Abstract
Parkinson’s disease (PD) is a neurodegenerative disorder characterized by fibrillar cytoplasmic aggregates of α-synuclein (i.e., Lewy bodies) and the associated loss of dopaminergic cells in the substantia nigra. Mutations in genes such as α-synuclein (SNCA) account for only 10% of PD occurrences. Exposure to environmental toxicants including pesticides and metals (e.g., paraquat (PQ) and manganese (Mn)) is also recognized as an important PD risk factor. Thus, aging, genetic alterations, and environmental factors all contribute to the etiology of PD. In fact, both genetic and environmental factors are thought to interact in the promotion of idiopathic PD, but the mechanisms involved are still unclear. In this study, we summarize our findings to date regarding the toxic synergistic effect between α-synuclein and paraquat treatment. We identified an essential role for central carbon (glucose) metabolism in dopaminergic cell death induced by paraquat treatment that is enhanced by the overexpression of α-synuclein. PQ “hijacks” the pentose phosphate pathway (PPP) to increase NADPH reducing equivalents and stimulate paraquat redox cycling, oxidative stress, and cell death. PQ also stimulated an increase in glucose uptake, the translocation of glucose transporters to the plasma membrane, and AMP-activated protein kinase (AMPK) activation. The overexpression of α-synuclein further stimulated an increase in glucose uptake and AMPK activity, but impaired glucose metabolism, likely directing additional carbon to the PPP to supply paraquat redox cycling.
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Almeida LLD, Teixeira ÁAC, Soares AF, Cunha FMD, Silva VAD, Vieira Filho LD, Wanderley-Teixeira V. Effects of melatonin in rats in the initial third stage of pregnancy exposed to sub-lethal doses of herbicides. Acta Histochem 2017; 119:220-227. [PMID: 28202179 DOI: 10.1016/j.acthis.2017.01.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 01/16/2017] [Accepted: 01/17/2017] [Indexed: 11/22/2022]
Abstract
Exposure to the herbicides Paraquat (PQ) and Roundup® may cause cell lesions due to an increase in oxidative stress levels in different biological systems, even in the reproductive system. OBJECTIVE Evaluate the possible changes in reproductive parameters and hepatic, as well as its prevention by simultaneous application of melatonin. METHODS Thirty-five female rats at the age of 3 months were divided into seven groups: three groups exposed to sub-lethal doses of the herbicides PQ (50mg/kg) and Roundup® (500mg/kg) (n=5, G2, G3 and G4); three groups exposed to herbicides and simultaneous treatment with 10mg/kg of Melatonin (n=5, G5, G6 and G7) and control group (n=5, G1) from the first to the seventh day of pregnancy. On the seventh day of pregnancy, the rats were anesthetized and euthanized, followed by laparotomy to remove their reproductive tissues and liver. Body and ovary weights were taken and the number of implantation sites, corpora lutea, preimplantation losses, implantation rates were counted and histopathology of the implantation sites, morphometry of the surface and glandular epithelia of endometrium and hepatic oxidative stress were undertaken. RESULTS The present study shows the decrease in body and ovary weight, decrease in the number of implantation sites, implantation rate, in the total number of corpora lutea and increase of preimplantation percentages were observed when compared to the G1: Fig. 1 and Table 1, (p>0.001 ANOVA/Tukey). The histopathological analysis of the implantation sites showed a disorder of the cytotrophoblast and cell degeneration within the blastocyst cavity in Fig. 4. Morphometry revealed a reduction in surface and glandular epithelia and in the diameter of the endometrial glands (Table 2; p>0.05 ANOVA/Tukey), whereas in liver, serum levels of thiobarbituric acid reactive substances (TBARS) were found to be significantly elevated (Fig. 2; p>0.001; p>0.05 ANOVA/Tukey), and serum level of reduced glutathione (GSH) was significantly lower (Fig. 3; p>0.001 ANOVA/Tukey). However, treatments with melatonin exhibited improvements in reproductive parameters, as well as reduced lesions in the implantation sites (Fig. 4.) and in serum levels TBARS (Fig. 2; p>0.001 ANOVA/Tukey), serum levels GSH (Fig. 3; p>0.001; p>0.05 ANOVA/Tukey). CONCLUSIONS These results reveal that melatonin is a protective agent against experimentally induced maternal/embryo toxicity with herbicides and favoring normalization of reproductive parameters and hepatic.
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Affiliation(s)
| | | | - Anísio Francisco Soares
- Department of Animal Morphology and Physiology, Federal Rural University of Pernambuco, Recife, Brazil
| | | | - Valdemiro Amaro da Silva
- Department of Animal Morphology and Physiology, Federal Rural University of Pernambuco, Recife, Brazil
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Kongtip P, Nankongnab N, Phupancharoensuk R, Palarach C, Sujirarat D, Sangprasert S, Sermsuk M, Sawattrakool N, Woskie SR. Glyphosate and Paraquat in Maternal and Fetal Serums in Thai Women. J Agromedicine 2017; 22:282-289. [PMID: 28422580 DOI: 10.1080/1059924x.2017.1319315] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVES This longitudinal study measured the glyphosate and paraquat concentrations found in maternal and umbilical cord serum in 82 pregnant women who gave birth in three provinces of Thailand. METHODS Through questionnaires and biological samples collected at childbirth, factors such as personal characteristics, family members occupation, agricultural activities, and herbicide use in agricultural work were evaluated as predictors of glyphosate and paraquat levels in the pregnant women. Statistical analysis used univariate and binary multiple logistic regression, where the outcome was the probability of exposure to paraquat or glyphosate above the limit of detection associated with occupation and household factors. RESULTS The glyphosate concentrations in the pregnant women's serum at childbirth (median: 17.5, range: 0.2-189.1 ng/mL) were significantly higher (P < .007) than those in the umbilical cord serum (median: 0.2, range: 0.2-94.9 ng/mL). However, the paraquat concentrations in the serum of the pregnant women at childbirth (83% ≤limit of detection [LOD], with maximum of 58.3 ng/mL) were similar to those in the umbilical cord serum (80% LOD in serum at childbirth were 11.9 times more likely to report work as an agriculturist (P < .001), 3.7 times more likely to live near agricultural areas (P = .006), and 5.9 times more likely to have a family member who worked in agriculture (P < .001). The only factors affecting paraquat exposures in pregnant women at childbirth were reporting the agricultural activity of digging in farm soil and working in the agricultural fields in the third trimester of pregnancy. CONCLUSIONS These results show that pregnant women who work in agriculture or live in families that work in agriculture have higher exposures to the herbicides glyphosate and paraquat. The potential for long-term health impacts of these prenatal exposures to children should be evaluated, and greater regulation of the sale and use of herbicides should be considered in Thailand.
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Affiliation(s)
- Pornpimol Kongtip
- a Department of Occupational Health and Safety, Faculty of Public Health , Mahidol University, Center of Excellence on Environmental Health and Toxicology, Commission on Higher Education, Ministry of Education , Bangkok , Thailand
| | - Noppanun Nankongnab
- a Department of Occupational Health and Safety, Faculty of Public Health , Mahidol University, Center of Excellence on Environmental Health and Toxicology, Commission on Higher Education, Ministry of Education , Bangkok , Thailand
| | - Ratanavadee Phupancharoensuk
- a Department of Occupational Health and Safety, Faculty of Public Health , Mahidol University, Center of Excellence on Environmental Health and Toxicology, Commission on Higher Education, Ministry of Education , Bangkok , Thailand
| | - Chonlada Palarach
- a Department of Occupational Health and Safety, Faculty of Public Health , Mahidol University, Center of Excellence on Environmental Health and Toxicology, Commission on Higher Education, Ministry of Education , Bangkok , Thailand
| | - Dusit Sujirarat
- b Department of Epidemiology, Faculty of Public Health , Mahidol University , Bangkok , Thailand
| | | | | | | | - Susan Renee Woskie
- f Department of Work Environment , University of Massachusetts Lowell , Lowell , Massachusetts , USA
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Jiang C, Zhang S, Liu H, Guan Z, Zeng Q, Zhang C, Lei R, Xia T, Wang Z, Yang L, Chen Y, Wu X, Zhang X, Cui Y, Yu L, Wang A. Low Glucose Utilization and Neurodegenerative Changes Caused by Sodium Fluoride Exposure in Rat’s Developmental Brain. Neuromolecular Med 2013; 16:94-105. [DOI: 10.1007/s12017-013-8260-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 08/16/2013] [Indexed: 12/22/2022]
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Zhang H, Liu P, Qiao P, Zhou J, Zhao Y, Xing X, Li G. CT imaging as a prognostic indicator for patients with pulmonary injury from acute paraquat poisoning. Br J Radiol 2013; 86:20130035. [PMID: 23652630 DOI: 10.1259/bjr.20130035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE CT imaging may be an effective diagnostic method for assessing the extent and progression of pulmonary injury in patients with acute paraquat (PQ) poisoning. METHODS A retrospective review of 78 patients with acute PQ poisoning (survivor group, n=42; non-survivor group, n=36) was conducted to examine the lung segment involvement and CT image characteristics from baseline (first CT scan at a mean of 2.4 days after poisoning) to treatment time (second CT scan 3 days after the first). We examined the association between prognosis and pulmonary lesions indicated by characteristic effusion, fibrosis and consolidation in CT images. RESULTS Significant differences were apparent in CT images at baseline and after 3 days between the survivor and the non-survivor groups, with higher levels of pulmonary segment involvement, effusion, consolidation and fibrosis observed in the non-survivor group at baseline (p<0.05). The non-survivor group also showed rapid lesion progression. The receiver operating characteristic curve indicated that the best prognostic value of baseline CT scanning was achieved when performed 2-3 days following the initial exposure. CONCLUSION Prognosis correlated with increasing lung segment involvement, extent of disease characteristics visualised using CT and speed of lesion progression from baseline. Prognostic evaluation using CT scanning can be used to effectively provide earlier treatment for patients at risk for severe complications associated with PQ toxicity, such as acidosis; leukocytosis; and renal, hepatic and pancreatic failures. ADVANCES IN KNOWLEDGE Chest CT scan can be used 2-3 days following acute PQ poisoning to determine prognosis.
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Affiliation(s)
- H Zhang
- Department of Radiology, Affiliated Hospital of the Academy of Military Medical Sciences, Beijing, China
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