1
|
Fucic A, Mantovani A, Vena J, Bloom MS, Sincic N, Vazquez M, Aguado-Sierra J. Impact of endocrine disruptors from mother's diet on immuno-hormonal orchestration of brain development and introduction of the virtual human twin tool. Reprod Toxicol 2023; 117:108357. [PMID: 36863570 DOI: 10.1016/j.reprotox.2023.108357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/19/2023] [Accepted: 02/22/2023] [Indexed: 03/04/2023]
Abstract
Diet has long been known to modify physiology during development and adulthood. However, due to a growing number of manufactured contaminants and additives over the last few decades, diet has increasingly become a source of exposure to chemicals that has been associated with adverse health risks. Sources of food contaminants include the environment, crops treated with agrochemicals, inappropriate storage (e.g., mycotoxins) and migration of xenobiotics from food packaging and food production equipment. Hence, consumers are exposed to a mixture of xenobiotics, some of which are endocrine disruptors (EDs). The complex interactions between immune function and brain development and their orchestration by steroid hormones are insufficiently understood in human populations, and little is known about the impact on immune-brain interactions by transplacental fetal exposure to EDs via maternal diet. To help to identify the key data gaps, this paper aims to present (a) how transplacental EDs modify immune system and brain development, and (b) how these mechanisms may correlate with diseases such as autism and disturbances of lateral brain development. Attention is given to disturbances of the subplate, a transient structure of crucial significance in brain development. Additionally, we describe cutting edge approaches to investigate the developmental neurotoxicity of EDs, such as the application of artificial intelligence and comprehensive modelling. In the future, highly complex investigations will be performed using virtual brain models constructed using sophisticated multi-physics/multi-scale modelling strategies based on patient and synthetic data, which will enable a greater understanding of healthy or disturbed brain development.
Collapse
Affiliation(s)
- A Fucic
- Institute for Medical Research and Occupational Health, Ksaverska C 2, Zagreb, Croatia.
| | - A Mantovani
- Istituto Superiore di Sanità, Department of Food Safety, Nutrition and Veterinary Public Health, Rome, Italy
| | - J Vena
- Public Health Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - M S Bloom
- Global and Community Health, George Mason University, 4400 University Dr., Fairfax, VA, USA
| | - N Sincic
- Medical School, University of Zagreb, Salata 3, Croatia
| | - M Vazquez
- Barcelona Supercomputing Center, Plaça Eusebi Güell, 1-3, Barcelona 08034, Spain
| | - J Aguado-Sierra
- Barcelona Supercomputing Center, Plaça Eusebi Güell, 1-3, Barcelona 08034, Spain
| |
Collapse
|
2
|
Spirhanzlova P, Couderq S, Le Mével S, Leemans M, Krief S, Mughal BB, Demeneix BA, Fini JB. Short- and Long-Term Effects of Chlorpyrifos on Thyroid Hormone Axis and Brain Development in Xenopus laevis. Neuroendocrinology 2022; 113:1298-1311. [PMID: 35753306 DOI: 10.1159/000525719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 06/20/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION The extensive use of the insecticide chlorpyrifos (CPF) throughout the world has brought increased scrutiny on its environmental and health impact. CPF is a cholinergic neurotoxicant; however, exposure to low noncholinergic doses is associated with numerous neurodevelopmental effects in animal models. In this study, we aimed to assess CPF for its potential to disrupt thyroid hormone signalling and investigate the short- and long-term effects on neurodevelopment by using Xenopus laevis. METHODS The thyroid hormone (TH) disrupting potential of CPF was assessed using TH-sensitive transgenic Tg(thibz:eGFP) tadpoles. The consequences of early embryonic exposure were examined by exposing fertilized eggs for 72 h to environmentally relevant CPF concentrations (10-10 M and 10-8 M). Three endpoints were evaluated: (1) gene expression in whole embryonic brains immediately after exposure, (2) mobility and brain morphology 1 week after exposure, and (3) brain morphology and axon diameters at the end of metamorphosis (2 months after the exposure). RESULTS CPF disrupted TH signalling in Tg(thibz:eGFP) tadpoles. The expression of genes klf9, cntn4, oatp1c1, and tubb2b was downregulated in response to CPF. Tadpoles exposed to CPF exhibited increased mobility and altered brain morphology compared to control tadpoles. Early embryonic exposure of CPF affected myelinated axon diameter, with exposed animals exhibiting shifted frequency distributions of myelinated axons diameters towards smaller diameters in the hindbrain of froglets. DISCUSSION/CONCLUSION This study provides more evidence of the endocrine and neurodevelopment disrupting activity of CPF. Further experimental and epidemiological studies are warranted to determine the long-term consequences of early CPF exposure on brain development.
Collapse
Affiliation(s)
- Petra Spirhanzlova
- Unité PhyMA Laboratory, Adaptation du Vivant, Muséum National d'Histoire Naturelle, Paris, France
- Unité Eco-Anthropologie, Hommes et Environnements, Muséum National d'Histoire Naturelle, Musée de l'Homme, Paris, France
- Laboratoire de Métrologie et d'Essais, Paris, France
| | - Stephan Couderq
- Unité PhyMA Laboratory, Adaptation du Vivant, Muséum National d'Histoire Naturelle, Paris, France
| | - Sébastian Le Mével
- Unité PhyMA Laboratory, Adaptation du Vivant, Muséum National d'Histoire Naturelle, Paris, France
| | - Michelle Leemans
- Unité PhyMA Laboratory, Adaptation du Vivant, Muséum National d'Histoire Naturelle, Paris, France
| | - Sabrina Krief
- Unité Eco-Anthropologie, Hommes et Environnements, Muséum National d'Histoire Naturelle, Musée de l'Homme, Paris, France
| | - Bilal B Mughal
- Unité PhyMA Laboratory, Adaptation du Vivant, Muséum National d'Histoire Naturelle, Paris, France
| | - Barbara A Demeneix
- Unité PhyMA Laboratory, Adaptation du Vivant, Muséum National d'Histoire Naturelle, Paris, France
| | - Jean-Baptiste Fini
- Unité PhyMA Laboratory, Adaptation du Vivant, Muséum National d'Histoire Naturelle, Paris, France
| |
Collapse
|
3
|
Piras IS, Gabriele S, Altieri L, Lombardi F, Sacco R, Lintas C, Manzi B, Curatolo P, Nobile M, Rigoletto C, Molteni M, Persico AM. Reevaluation of Serum Arylesterase Activity in Neurodevelopmental Disorders. Antioxidants (Basel) 2021; 10:antiox10020164. [PMID: 33499329 PMCID: PMC7912005 DOI: 10.3390/antiox10020164] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 12/26/2022] Open
Abstract
Organophosphate compounds (OPs) interfere with neurodevelopment and are neurotoxic for humans and animals. They are first biotransformed to the more toxic oxon form, and then hydrolyzed to specific metabolites by the enzyme paraoxonase/arylesterase, encoded by the gene PON1 located on human chr. 7q21.3. In autism spectrum disorder (ASD) and in attention-deficit/hyperactivity disorder (ADHD), a correlation between OP exposure and disease onset has been reported. In this case-control study, we aimed to replicate our previous work showing reduced levels of serum PON1 arylesterase activity in Italian and Caucasian-American ASD samples, and to extend our analysis to other neurodevelopmental disorders, namely ADHD and developmental language disorder (DLD), also known as specific language impairment (SLI). The arylesterase activity, measured using standard spectrophotometric methods, is significantly reduced in the ADHD, and not in the ASD sample compared with the controls. Our previous results seemingly stem from spuriously high arylesterase levels in the former control sample. Finally, genotyping SNPs rs705379 and rs662 using TDI-FP, a significant effect of rs705379 alleles on the serum arylesterase activity is observed in all of the subgroups tested, regardless of diagnosis, as well as a lack of association between PON1 gene polymorphisms and ASD/ADHD susceptibility in the Italian population. In summary, the serum arylesterase activity is reduced in children and adolescents with ADHD, and this reduction is not due to the functional PON1 gene variants assessed in this study. Based on previous literature, it may more likely reflect enhanced oxidative stress than specific genetic underpinnings.
Collapse
Affiliation(s)
- Ignazio Stefano Piras
- Unit of Child & Adolescent Neuropsychiatry, University Campus Bio-Medico, I-00128 Rome, Italy; (I.S.P.); (S.G.); (L.A.); (F.L.); (R.S.); (C.L.)
- Neurogenomics Division, The Translational Genomics Research Institute, Phoenix, AZ 85254, USA
| | - Stefano Gabriele
- Unit of Child & Adolescent Neuropsychiatry, University Campus Bio-Medico, I-00128 Rome, Italy; (I.S.P.); (S.G.); (L.A.); (F.L.); (R.S.); (C.L.)
| | - Laura Altieri
- Unit of Child & Adolescent Neuropsychiatry, University Campus Bio-Medico, I-00128 Rome, Italy; (I.S.P.); (S.G.); (L.A.); (F.L.); (R.S.); (C.L.)
| | - Federica Lombardi
- Unit of Child & Adolescent Neuropsychiatry, University Campus Bio-Medico, I-00128 Rome, Italy; (I.S.P.); (S.G.); (L.A.); (F.L.); (R.S.); (C.L.)
| | - Roberto Sacco
- Unit of Child & Adolescent Neuropsychiatry, University Campus Bio-Medico, I-00128 Rome, Italy; (I.S.P.); (S.G.); (L.A.); (F.L.); (R.S.); (C.L.)
| | - Carla Lintas
- Unit of Child & Adolescent Neuropsychiatry, University Campus Bio-Medico, I-00128 Rome, Italy; (I.S.P.); (S.G.); (L.A.); (F.L.); (R.S.); (C.L.)
| | - Barbara Manzi
- Unit of Child and Adolescent Neuropsychiatry, University of Rome “Tor Vergata”, I-00133 Rome, Italy; (B.M.); (P.C.)
| | - Paolo Curatolo
- Unit of Child and Adolescent Neuropsychiatry, University of Rome “Tor Vergata”, I-00133 Rome, Italy; (B.M.); (P.C.)
| | - Maria Nobile
- Child Psychopathology Unit, Scientific Institute, IRCCS ‘E. Medea’, I-23842 Bosisio Parini (LC), Italy; (M.N.); (C.R.); (M.M.)
| | - Catia Rigoletto
- Child Psychopathology Unit, Scientific Institute, IRCCS ‘E. Medea’, I-23842 Bosisio Parini (LC), Italy; (M.N.); (C.R.); (M.M.)
| | - Massimo Molteni
- Child Psychopathology Unit, Scientific Institute, IRCCS ‘E. Medea’, I-23842 Bosisio Parini (LC), Italy; (M.N.); (C.R.); (M.M.)
| | - Antonio M. Persico
- Interdepartmental Program “Autism 0–90”, “G. Martino” University Hospital, University of Messina, I-98122 Messina, Italy
- Correspondence:
| |
Collapse
|
4
|
van den Dries MA, Lamballais S, El Marroun H, Pronk A, Spaan S, Ferguson KK, Longnecker MP, Tiemeier H, Guxens M. Prenatal exposure to organophosphate pesticides and brain morphology and white matter microstructure in preadolescents. ENVIRONMENTAL RESEARCH 2020; 191:110047. [PMID: 32805249 PMCID: PMC7657967 DOI: 10.1016/j.envres.2020.110047] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 08/07/2020] [Accepted: 08/07/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Prenatal exposure to organophosphate (OP) pesticides associate with impaired neurodevelopment in humans and animal models. However, much uncertainty exists about the brain structural alterations underlying these associations. The objective of this study was to determine whether maternal OP pesticide metabolite concentrations in urine repeatedly measured during gestation are associated with brain morphology and white matter microstructure in 518 preadolescents aged 9-12 years. METHOD Data came from 518 mother-child pairs participating in the Generation R Study, a population-based birth cohort from Rotterdam, the Netherlands. Maternal urine concentrations were determined for 6 dialkylphosphates (DAPs) including 3 dimethyl (DM) and 3 diethyl (DE) alkyl phosphate metabolites, collected at early, mid, and late pregnancy. At child's age 9-12 years, magnetic resonance imaging was performed to obtain T1-weighted images for brain volumes and surface-based cortical thickness and cortical surface area, and diffusion tensor imaging was used to measure white matter microstructure through fractional anisotropy (FA) and mean diffusivity (MD). Linear regression models were fit for the averaged prenatal exposure across pregnancy. RESULTS DM and DE metabolite concentrations were not associated with brain volumes, cortical thickness, and cortical surface area. However, a 10-fold increase in averaged DM metabolite concentrations across pregnancy was associated with lower FA (B = -1.00, 95%CI = -1.80, -0.20) and higher MD (B = 0.13, 95%CI = 0.04, 0.21). Similar associations were observed for DE concentrations. CONCLUSIONS This study provides the first evidence that OP pesticides may alter normal white matter microstructure in children, which could have consequences for normal neurodevelopment. No associations were observed with structural brain morphology, including brain volumes, cortical thickness, and cortical surface area.
Collapse
Affiliation(s)
- Michiel A van den Dries
- Erasmus MC, University Medical Center Rotterdam, Department of Child and Adolescent Psychiatry, Rotterdam, 3015 CN, the Netherlands; Erasmus MC, University Medical Center Rotterdam, The Generation R Study Group, Rotterdam, 3015 CN, the Netherlands
| | - Sander Lamballais
- Erasmus MC, University Medical Center Rotterdam, The Generation R Study Group, Rotterdam, 3015 CN, the Netherlands; Erasmus MC, University Medical Center Rotterdam, Department of Epidemiology, Rotterdam, 3015 CN, the Netherlands; Erasmus MC, University Medical Center Rotterdam, Department of Clinical Genetics, Rotterdam, 3015 CN, the Netherlands
| | - Hanan El Marroun
- Erasmus MC, University Medical Center Rotterdam, Department of Child and Adolescent Psychiatry, Rotterdam, 3015 CN, the Netherlands; Erasmus MC, University Medical Center Rotterdam, Department of Pediatrics, Rotterdam, 3015 CN, the Netherlands; Department of Psychology, Education and Child Studies, Erasmus School of Social and Behavioral Sciences, Erasmus University Rotterdam, 3062 PA, the Netherlands
| | - Anjoeka Pronk
- Department of Risk Analysis for Products in Development, TNO, Utrecht, 3584 CB, the Netherlands
| | - Suzanne Spaan
- Department of Risk Analysis for Products in Development, TNO, Utrecht, 3584 CB, the Netherlands
| | - Kelly K Ferguson
- Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Durham, North Carolina, NC, 27709, USA
| | | | - Henning Tiemeier
- Erasmus MC, University Medical Center Rotterdam, Department of Child and Adolescent Psychiatry, Rotterdam, 3015 CN, the Netherlands; Department of Social and Behavioral Sciences, Harvard T. H. Chan School of Public Health, Boston, MA, 02115, USA
| | - Mònica Guxens
- Erasmus MC, University Medical Center Rotterdam, Department of Child and Adolescent Psychiatry, Rotterdam, 3015 CN, the Netherlands; ISGlobal, Barcelona, 08003, Spain; Pompeu Fabra University, Barcelona, 08002, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, 28029, Spain.
| |
Collapse
|
5
|
|
6
|
Zhang X, Cui W, Wang K, Chen R, Chen M, Lan K, Wei Y, Pan C, Lan X. Chlorpyrifos inhibits sperm maturation and induces a decrease in mouse male fertility. ENVIRONMENTAL RESEARCH 2020; 188:109785. [PMID: 32798940 DOI: 10.1016/j.envres.2020.109785] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 05/08/2020] [Accepted: 06/03/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Pesticides, especially organophosphorus pesticides such as chlorpyrifos (CPF), play an important role in modern agriculture. Studies have shown that pesticide residues are an important cause of male reproductive injury in mammal. AIM The aim of this study was to evaluate the reproductive damage caused by CPF in male mice and investigate the underlying mechanisms. METHODS In vivo, C57BL/6 mice (6-8 weeks old) were treated with CPF for 14, 70, and 80 days by intraperitoneal injection, intragastric administration, and dietary supplementation, respectively. Then, sperm from the cauda epididymidis was cultured in vitro to confirm the deleterious effects of CPF. RESULTS The in vivo results indicated that, after treatment with CPF by dietary supplementation and intraperitoneal injection, the expression of reproduction-related genes in the mouse testes was altered, although the mice were fertile and the testes presented no morphological abnormalities. Notably, mating experiments revealed that the fertility of male mice was decreased following CPF administration by gavage. Sperm motility within the cauda epididymidis declined significantly after CPF treatment, which was accompanied by a decrease in sperm density, upregulation of relative reactive oxygen species (ROS) levels, and downregulation of glutathione reductase activity. In vitro incubation experiments showed that sperm rapidly lost their capacity for linear movement; the relative ROS levels also increased significantly, while the mitochondrial membrane potential (MMP) showed a significant decrease. However, the integrity of the plasma membrane was not affected by CPF administration. CONCLUSIONS The above data indicated that exposure to CPF reduces sperm motility by disrupting mitochondrial function and increasing the level of oxidative stress during sperm maturation, thereby reducing the fecundity of male mice.
Collapse
Affiliation(s)
- Xuelian Zhang
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Yangling, Shaanxi, China.
| | - Wenbo Cui
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Yangling, Shaanxi, China.
| | - Ke Wang
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Yangling, Shaanxi, China.
| | - Rui Chen
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Yangling, Shaanxi, China.
| | - Mingyue Chen
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Yangling, Shaanxi, China.
| | - Kangshu Lan
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China.
| | - Yanpei Wei
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Yangling, Shaanxi, China.
| | - Chuanying Pan
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Yangling, Shaanxi, China.
| | - Xianyong Lan
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Yangling, Shaanxi, China.
| |
Collapse
|
7
|
Liu L, Yang M, He M, Liu T, Chen F, Li Y, Feng X, Zhang Y, Zhang F. Magnetic solid phase extraction sorbents using methyl-parathion and quinalphos dual-template imprinted polymers coupled with GC-MS for class-selective extraction of twelve organophosphorus pesticides. Mikrochim Acta 2020; 187:503. [PMID: 32812169 DOI: 10.1007/s00604-020-04465-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 07/25/2020] [Indexed: 11/26/2022]
Abstract
A novel magnetic dual-template molecularly imprinted polymer (DMIP) was prepared with methyl-parathion and quinalphos as templates. For comparison, a series of single-template polymers with only methyl-parathion (MPMIP) or quinalphos (QPMIP) as template as well as a non-imprinted polymer (NIP) in the absence of the template, were synthesized using the same procedure of DMIP. The obtained MIPs were characterized by scanning electron microscopy(SEM), Fourier transform infrared (FT-IR) spectroscopy, vibrating sample magnetometer (VSM), and X-ray diffraction (XRD). The properties including kinetic effect, thermodynamic effect, selectivity, and reusability of MIPs were investigated . Only DMIP possessed high affinity and good recognition for all twelve OPPs including quinalphos, isazophos, chlorpyrifos-methyl, chlorpyrifos, methidathion, triazophos, profenofos, fenthion, fenitrothion, methyl-parathion, parathion, and paraoxon in comparison to MPMIP, QPMIP, or NIP. Moreover, DMIP was used as magnetic solid phase extraction (MSPE) sorbent for the pre-concentration of twelve OPPs in cabbage samples. The developed DMIP-MSPE-GC-MS method showed high sensitivity, low LODs (1.62-13.9 ng/g), fast adsorption equilibrium (10 min), and acceptable spiked recoveries (81.5-113.4%) with relative standard deviations (RSD) in the range 0.05-7.0% (n = 3). The calibration plots were linear in the range 10-800 ng/mL with coefficients of determination (R2) better 0.99 for all twelve compounds. These results suggest that the DMIP is applicable for rapid determination and high throughput analysis of multi-pesticide residues. Graphical abstract.
Collapse
Affiliation(s)
- Lixia Liu
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, China
- School of Pharmacy, China Medical University, Shenyang, China
| | - Minli Yang
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, China
| | - Muyi He
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, China
| | - Tong Liu
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, China
| | - Fengming Chen
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, China
| | - Yinlong Li
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, China
| | - Xuesong Feng
- School of Pharmacy, China Medical University, Shenyang, China
| | - Yuan Zhang
- School of Pharmacy, China Medical University, Shenyang, China
| | - Feng Zhang
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, China.
| |
Collapse
|
8
|
Gestational exposures to organophosphorus insecticides: From acute poisoning to developmental neurotoxicity. Neuropharmacology 2020; 180:108271. [PMID: 32814088 DOI: 10.1016/j.neuropharm.2020.108271] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 07/03/2020] [Accepted: 08/10/2020] [Indexed: 11/22/2022]
Abstract
For over three-quarters of a century, organophosphorus (OP) insecticides have been ubiquitously used in agricultural, residential, and commercial settings and in public health programs to mitigate insect-borne diseases. Their broad-spectrum insecticidal effectiveness is accounted for by the irreversible inhibition of acetylcholinesterase (AChE), the enzyme that catalyzes acetylcholine (ACh) hydrolysis, in the nervous system of insects. However, because AChE is evolutionarily conserved, OP insecticides are also toxic to mammals, including humans, and acute OP intoxication remains a major public health concern in countries where OP insecticide usage is poorly regulated. Environmental exposures to OP levels that are generally too low to cause marked inhibition of AChE and to trigger acute signs of intoxication, on the other hand, represent an insidious public health issue worldwide. Gestational exposures to OP insecticides are particularly concerning because of the exquisite sensitivity of the developing brain to these insecticides. The present article overviews and discusses: (i) the health effects and therapeutic management of acute OP poisoning during pregnancy, (ii) epidemiological studies examining associations between environmental OP exposures during gestation and health outcomes of offspring, (iii) preclinical evidence that OP insecticides are developmental neurotoxicants, and (iv) potential mechanisms underlying the developmental neurotoxicity of OP insecticides. Understanding how gestational exposures to different levels of OP insecticides affect pregnancy and childhood development is critical to guiding implementation of preventive measures and direct research aimed at identifying effective therapeutic interventions that can limit the negative impact of these exposures on public health.
Collapse
|
9
|
Gu J, Xu S, Liu Y, Chen X. Chlorpyrifos-induced toxicity has no gender selectivity in the early fetal brain. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2020; 55:803-812. [PMID: 32602772 DOI: 10.1080/03601234.2020.1786326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Organophosphorus pesticides induce gender-specific developmental neurotoxicity after birth, especially in adolescents and adults. However, whether and when the selectivity occurs in fetus remains unclear. In this study, we analyzed chlorpyrifos (CPF)-induced neurotoxicity in the early fetal brains of male and female mice. The gestational dams were administered 0, 1, 3, and 5 mg/(kg.d) CPF during gestational days (GD)7-11, and brains from the fetuses were isolated and analyzed on GD12. Fetal gender was identified by PCR technique based on male-specific Sry gene and Myog control gene. The body weight and head weight, the activity of acetylcholinesterase (AChE), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), and the content of malondialdehyde (MDA), as well as the oxidative stress-related gene expression were examined. Our results showed that CPF pretreatment induced AChE inhibition in GD12 fetal brain. CPF treatment activated SOD and GPX but not CAT and MDA. For oxidative stress-related gene expression, CPF pretreatment increased mRNA expression of Sod1, Cat, Gpx1, and Gpx2 in the fetal brain on GD12. The statistical analysis did not show gender-selective CPF-induced toxicity. Moreover, our results showed that although the gestational exposure to CPF could elicit abnormalities in the early fetal brain, the toxicity observed was not gender-specific.
Collapse
Affiliation(s)
- Jiabin Gu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Shuai Xu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Yuqiong Liu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| | - Xiaoping Chen
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
| |
Collapse
|
10
|
Nesan D, Kurrasch DM. Gestational Exposure to Common Endocrine Disrupting Chemicals and Their Impact on Neurodevelopment and Behavior. Annu Rev Physiol 2019; 82:177-202. [PMID: 31738670 DOI: 10.1146/annurev-physiol-021119-034555] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Endocrine disrupting chemicals are common in our environment and act on hormone systems and signaling pathways to alter physiological homeostasis. Gestational exposure can disrupt developmental programs, permanently altering tissues with impacts lasting into adulthood. The brain is a critical target for developmental endocrine disruption, resulting in altered neuroendocrine control of hormonal signaling, altered neurotransmitter control of nervous system function, and fundamental changes in behaviors such as learning, memory, and social interactions. Human cohort studies reveal correlations between maternal/fetal exposure to endocrine disruptors and incidence of neurodevelopmental disorders. Here, we summarize the major literature findings of endocrine disruption of neurodevelopment and concomitant changes in behavior by four major endocrine disruptor classes:bisphenol A, polychlorinated biphenyls, organophosphates, and polybrominated diphenyl ethers. We specifically review studies of gestational and/or lactational exposure to understand the effects of early life exposure to these compounds and summarize animal studies that help explain human correlative data.
Collapse
Affiliation(s)
- Dinushan Nesan
- Department of Medical Genetics, University of Calgary, Calgary, Alberta T2N 4N1, Canada; , .,Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta T2N 4N1, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Deborah M Kurrasch
- Department of Medical Genetics, University of Calgary, Calgary, Alberta T2N 4N1, Canada; , .,Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta T2N 4N1, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| |
Collapse
|
11
|
Alipour V, Hoseinpour F, Vatanparast J. Persistent alterations in seizure susceptibility, drug responsiveness and comorbidities associated with chemical kindling after neonatal exposure to an organophosphate. Neurotoxicology 2019; 73:92-99. [DOI: 10.1016/j.neuro.2019.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/19/2019] [Accepted: 03/07/2019] [Indexed: 12/20/2022]
|
12
|
Pang L, Liu J, Li W, Xia Y, Xing J. Serum ubiquitin C-terminal hydrolase L1 predicts cognitive impairment in patients with acute organophosphorus pesticide poisoning. J Clin Lab Anal 2019; 33:e22947. [PMID: 31199012 PMCID: PMC6757117 DOI: 10.1002/jcla.22947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/25/2019] [Accepted: 05/18/2019] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND To assess the usefulness of serum C-terminal hydrolase L1 (UCH-L1) level as a biomarker for predicting cognitive impairment in patients with acute organophosphorus pesticide poisoning (AOPP). METHODS Two hundred and seven adult patients with AOPP were included in this study. Serum UCH-L1 levels were assessed on admission (Day 1 postpoisoning) and on Days 3 and 7 postpoisoning. The associations between serum UCH-L1 levels, other clinical predictors, and cognitive function evaluated on Day 30 postpoisoning were investigated. RESULTS On multivariate analysis, serum UCH-L1 levels on admission (odds ratio [OR] 1.889, 95% confidence interval [CI] 1.609-3.082, P = 0.002) and 24-hour APACHE II score (OR 1.736, 95% CI 1.264-3.272, P = 0.012) were independent predictors of cognitive impairment on Day 30 postpoisoning. Based on the receiver operating characteristic curve, serum UCH-L1 levels >5.9 ng/mL on admission predicted cognitive impairment on Day 30 postpoisoning with 86.1% sensitivity and 72.5% specificity (area under the curve, 0.869; 95% CI 0.815-0.923). On admission [8.51 (6.53-10.22) ng/mL vs 4.25 (2.57-6.31) ng/mL, P < 0.001] and Day 3 [9.31 (7.92-10.98) ng/mL vs 3.32 (2.25-5.13) ng/mL, P < 0.001] and Day 7 [4.96 (3.28-7.26) ng/mL vs 2.27 (1.55-3.24) ng/mL, P < 0.001] postpoisoning, serum UCH-L1 concentration was significantly higher in patients that developed cognitive impairment compared to those that did not. CONCLUSION This study demonstrates that serum UCH-L1 level has potential as a novel biomarker for predicting cognitive impairment 30 days after AOPP.
Collapse
Affiliation(s)
- Li Pang
- Department of Emergency, The First Hospital of Jilin University, Changchun, China
| | - Junlan Liu
- Department of Emergency, The First Hospital of Jilin University, Changchun, China
| | - Wei Li
- Department of Emergency, The First Hospital of Jilin University, Changchun, China
| | - Yan Xia
- Department of Gastroenterology, The First Hospital of Jilin University, Changchun, China
| | - Jihong Xing
- Department of Emergency, The First Hospital of Jilin University, Changchun, China
| |
Collapse
|
13
|
Kaur S, Singla N, Dhawan DK. Neuro-protective potential of quercetin during chlorpyrifos induced neurotoxicity in rats. Drug Chem Toxicol 2019; 42:220-230. [DOI: 10.1080/01480545.2019.1569022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Simranjeet Kaur
- Department of Biophysics, Panjab University, Chandigarh, India
| | - Neha Singla
- Department of Biophysics, Panjab University, Chandigarh, India
| | - D. K. Dhawan
- Department of Biophysics, Panjab University, Chandigarh, India
| |
Collapse
|
14
|
Uniyal S, Sharma RK. Technological advancement in electrochemical biosensor based detection of Organophosphate pesticide chlorpyrifos in the environment: A review of status and prospects. Biosens Bioelectron 2018; 116:37-50. [DOI: 10.1016/j.bios.2018.05.039] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 05/23/2018] [Accepted: 05/23/2018] [Indexed: 02/07/2023]
|
15
|
Burke RD, Todd SW, Lumsden E, Mullins RJ, Mamczarz J, Fawcett WP, Gullapalli RP, Randall WR, Pereira EFR, Albuquerque EX. Developmental neurotoxicity of the organophosphorus insecticide chlorpyrifos: from clinical findings to preclinical models and potential mechanisms. J Neurochem 2017; 142 Suppl 2:162-177. [PMID: 28791702 DOI: 10.1111/jnc.14077] [Citation(s) in RCA: 139] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/16/2017] [Accepted: 05/18/2017] [Indexed: 12/20/2022]
Abstract
Organophosphorus (OP) insecticides are pest-control agents heavily used worldwide. Unfortunately, they are also well known for the toxic effects that they can trigger in humans. Clinical manifestations of an acute exposure of humans to OP insecticides include a well-defined cholinergic crisis that develops as a result of the irreversible inhibition of acetylcholinesterase (AChE), the enzyme that hydrolyzes the neurotransmitter acetylcholine (ACh). Prolonged exposures to levels of OP insecticides that are insufficient to trigger signs of acute intoxication, which are hereafter referred to as subacute exposures, have also been associated with neurological deficits. In particular, epidemiological studies have reported statistically significant correlations between prenatal subacute exposures to OP insecticides, including chlorpyrifos, and neurological deficits that range from cognitive impairments to tremors in childhood. The primary objectives of this article are: (i) to address the short- and long-term neurological issues that have been associated with acute and subacute exposures of humans to OP insecticides, especially early in life (ii) to discuss the translational relevance of animal models of developmental exposure to OP insecticides, and (iii) to review mechanisms that are likely to contribute to the developmental neurotoxicity of OP insecticides. Most of the discussion will be focused on chlorpyrifos, the top-selling OP insecticide in the United States and throughout the world. These points are critical for the identification and development of safe and effective interventions to counter and/or prevent the neurotoxic effects of these chemicals in the developing brain. This is an article for the special issue XVth International Symposium on Cholinergic Mechanisms.
Collapse
Affiliation(s)
- Richard D Burke
- Division of Translational Toxicology, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Spencer W Todd
- Division of Translational Toxicology, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Eric Lumsden
- Division of Translational Toxicology, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Roger J Mullins
- Department of Diagnostic Radiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Jacek Mamczarz
- Division of Translational Toxicology, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - William P Fawcett
- Division of Translational Toxicology, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Rao P Gullapalli
- Department of Diagnostic Radiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - William R Randall
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Edna F R Pereira
- Division of Translational Toxicology, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA.,Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Edson X Albuquerque
- Division of Translational Toxicology, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA.,Department of Pharmacology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| |
Collapse
|
16
|
Van Maele-Fabry G, Gamet-Payrastre L, Lison D. Residential exposure to pesticides as risk factor for childhood and young adult brain tumors: A systematic review and meta-analysis. ENVIRONMENT INTERNATIONAL 2017. [PMID: 28623811 DOI: 10.1016/j.envint.2017.05.018] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
BACKGROUND Accumulating evidence suggests a positive association between exposure to non-agricultural pesticides and childhood brain tumors (CBT). OBJECTIVE (1) To conduct a systematic review and meta-analysis of published studies on the association between residential/household/domestic exposure to pesticides and childhood brain tumors. (2) To clarify variables that could impact the results. METHODS Publications in English were identified from a MEDLINE search through 28 February 2017 and from the reference list of identified publications. Risk estimates were extracted from 18 case-control studies published between 1979 and 2016 and study quality assessments were performed. Summary odds ratios (mOR) were calculated according to fixed and random-effect meta-analysis models. Separate analyses were conducted after stratification for study quality, critical exposure period, exposure location, specific exposures, pesticide category, application methods, type of pest treated, type of CBT, child's age at diagnosis and geographic location. RESULTS Statistically significant associations were observed with CBT after combining all studies (mOR: 1.26; 95% CI: 1.13-1.40) without evidence of inconsistency between study results or publication bias. Specifically, increased risks were observed for several groupings and more particularly for gliomas and exposure involving insecticides. Statistical significance was also reached for high quality studies, for all exposure periods, for indoor exposure and, more particularly, during the prenatal period for all stratifications involving insecticides (except for outdoor use), for pet treatments, for flea/tick treatment, for studies from USA/Canada and studies from Europe (borderline) as well as for data from studies including children of up to 10years at diagnosis and of up to 15years. CONCLUSIONS Our findings support an association between residential exposure to pesticides and childhood brain tumors. Although causality cannot be established, these results add to the evidence leading to recommend limiting residential use of pesticides and to support public health policies serving this objective.
Collapse
Affiliation(s)
- Geneviève Van Maele-Fabry
- Université catholique de Louvain, Louvain Centre for Toxicology and Applied Pharmacology (LTAP), Avenue E. Mounier 53.02, B-1200 Brussels, Belgium.
| | - Laurence Gamet-Payrastre
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS 180 chemin de Tournefeuille, BP 93173 Toulouse, France
| | - Dominique Lison
- Université catholique de Louvain, Louvain Centre for Toxicology and Applied Pharmacology (LTAP), Avenue E. Mounier 53.02, B-1200 Brussels, Belgium
| |
Collapse
|
17
|
Mamczarz J, Pescrille JD, Gavrushenko L, Burke RD, Fawcett WP, DeTolla LJ, Chen H, Pereira EFR, Albuquerque EX. Spatial learning impairment in prepubertal guinea pigs prenatally exposed to the organophosphorus pesticide chlorpyrifos: Toxicological implications. Neurotoxicology 2016; 56:17-28. [PMID: 27296654 DOI: 10.1016/j.neuro.2016.06.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 06/09/2016] [Accepted: 06/09/2016] [Indexed: 11/17/2022]
Abstract
Exposure of the developing brain to chlorpyrifos (CPF), an organophosphorus (OP) pesticide used extensively in agriculture worldwide, has been associated with increased prevalence of cognitive deficits in children, particularly boys. The present study was designed to test the hypothesis that cognitive deficits induced by prenatal exposure to sub-acute doses of CPF can be reproduced in precocial small species. To address this hypothesis, pregnant guinea pigs were injected daily with CPF (25mg/kg,s.c.) or vehicle (peanut oil) for 10days starting on presumed gestation day (GD) 53-55. Offspring were born around GD 65, weaned on postnatal day (PND) 20, and subjected to behavioral tests starting around PND 30. On the day of birth, butyrylcholinesterase (BuChE), an OP bioscavenger used as a biomarker of OP exposures, and acetylcholinesterase (AChE), a major molecular target of OP compounds, were significantly inhibited in the blood of CPF-exposed offspring. In their brains, BuChE, but not AChE, was significantly inhibited. Prenatal CPF exposure had no significant effect on locomotor activity or on locomotor habituation, a form of non-associative memory assessed in open fields. Spatial navigation in the Morris water maze (MWM) was found to be sexually dimorphic among guinea pigs, with males outperforming females. Prenatal CPF exposure impaired spatial learning more significantly among male than female guinea pigs and, consequently, reduced the sexual dimorphism of the task. The results presented here, which strongly support the test hypothesis, reveal that the guinea pig is a valuable animal model for preclinical assessment of the developmental neurotoxicity of OP pesticides. These findings are far reaching as they lay the groundwork for future studies aimed at identifying therapeutic interventions to treat and/or prevent the neurotoxic effects of CPF in the developing brain.
Collapse
Affiliation(s)
- Jacek Mamczarz
- Division of Translational Toxicology, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - Joseph D Pescrille
- Division of Translational Toxicology, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - Lisa Gavrushenko
- Division of Translational Toxicology, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - Richard D Burke
- Division of Translational Toxicology, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - William P Fawcett
- Division of Translational Toxicology, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - Louis J DeTolla
- Program of Comparative Medicine and Departments of Pathology and Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - Hegang Chen
- Division of Biostatistics and Bioinformatics, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - Edna F R Pereira
- Division of Translational Toxicology, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - Edson X Albuquerque
- Division of Translational Toxicology, University of Maryland School of Medicine, Baltimore, MD 21201, United States.
| |
Collapse
|
18
|
Li P, Yin YL, Zhu ML, Pan GP, Zhao FR, Lu JX, Liu Z, Wang SX, Hu CP. Chronic administration of isocarbophos induces vascular cognitive impairment in rats. J Cell Mol Med 2016; 20:731-9. [PMID: 26818681 PMCID: PMC5125717 DOI: 10.1111/jcmm.12775] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 12/01/2015] [Indexed: 01/26/2023] Open
Abstract
Vascular dementia, being the most severe form of vascular cognitive impairment (VCI), is caused by cerebrovascular disease. Whether organophosphorus causes VCI remains unknown. Isocarbophos (0.5 mg/kg per 2 days) was intragastrically administrated to rats for 16 weeks. The structure and function of cerebral arteries were assayed. The learning and memory were evaluated by serial tests of step-down, step-through and morris water maze. Long-term administration of isocarbophos reduced the hippocampal acetylcholinesterase (AChE) activity and acetylcholine (ACh) content but did not alter the plasma AChE activity, and significantly damaged the functions of learning and memory. Moreover, isocarbophos remarkably induced endothelial dysfunction in the middle cerebral artery and the expressions of ICAM-1 and VCAM-1 in the posterior cerebral artery. Morphological analysis by light microscopy and electron microscopy indicated disruptions of the hippocampus and vascular wall in the cerebral arteries from isocarbophos-treated rats. Treatment of isocarbophos injured primary neuronal and astroglial cells isolated from rats. Correlation analysis demonstrated that there was a high correlation between vascular function of cerebral artery and hippocampal AChE activity or ACh content in rats. In conclusion, chronic administration of isocarbophos induces impairments of memory and learning, which is possibly related to cerebral vascular dysfunction.
Collapse
Affiliation(s)
- Peng Li
- Department of Pharmacology, Pharmaceutical College, Central South University, Changsha, China.,College of Pharmacy, Xinxiang Medical University, Xinxiang, China
| | - Ya-Ling Yin
- College of Basic Medical Sciences, Tongji Medical School, Huazhong University of Science and Technology, Wuhan, China.,School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Mo-Li Zhu
- Sanqun Medical College, Xinxiang Medical University, Xinxiang, China
| | - Guo-Pin Pan
- Department of Pharmacology, Pharmaceutical College, Central South University, Changsha, China
| | - Fan-Rong Zhao
- Sanqun Medical College, Xinxiang Medical University, Xinxiang, China
| | - Jun-Xiu Lu
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Zhan Liu
- Department of Clinical Nutrition, The Affiliated Hospital, Hunan Normal University, Changsha, China
| | - Shuang-Xi Wang
- College of Pharmacy, Xinxiang Medical University, Xinxiang, China.,The Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan, China
| | - Chang-Ping Hu
- Department of Pharmacology, Pharmaceutical College, Central South University, Changsha, China
| |
Collapse
|
19
|
Tian J, Dai H, Deng Y, Zhang J, Li Y, Zhou J, Zhao M, Zhao M, Zhang C, Zhang Y, Wang P, Bing G, Zhao L. The effect of HMGB1 on sub-toxic chlorpyrifos exposure-induced neuroinflammation in amygdala of neonatal rats. Toxicology 2015; 338:95-103. [PMID: 26524701 DOI: 10.1016/j.tox.2015.10.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 10/26/2015] [Accepted: 10/26/2015] [Indexed: 02/04/2023]
Abstract
Chlorpyrifos (CPF), one of organophosphorus pesticides (OPs), is associated with developmental neurotoxicity. Inflammatory response is closely related with CPF-induced neurotoxicity. The present study aimed at exploring whether sub-toxic CPF exposure on neonatal rats results in neuroinflammation that mediated by HMGB1/TLR4/NF-κB signaling pathway in the amygdala. The neonatal rats were subcutaneously injected with 5mg/kg CPF for 4 consecutive days (postnatal day 11-14) with or without HMGB1 inhibitor, glycyrrhizin. We assessed the levels of pro-inflammatory cytokines at 12, 24, and 72 h after CPF exposure. The role of HMGB1 on neuroinflammation in sub-toxic exposure during brain development was studied. CPF-treated neonatal rats exhibited a significant increase in the expression of pro-inflammatory cytokines, such as IL-6, TNF-α and HMGB1, and a significant increase in the activation of NF-κB in the amygdala after CPF exposure. Inhibited HMGB1 reduced the release of IL-6 and TNF-α, and inhibited activation of NF-κB. Our findings indicate that CPF exposure on developmental brain might induce the activation of neuroinflammation mediated by HMGB1/TLR4/NF-κB pathway in the amygdala.
Collapse
Affiliation(s)
- Jing Tian
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Hongmei Dai
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Yuanying Deng
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Jie Zhang
- Department of Neurology, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Ying Li
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Jun Zhou
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Mingyi Zhao
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Mengwen Zhao
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Chen Zhang
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Yuxi Zhang
- Department of Cardiology Surgery, Nanjing Children's Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Peipei Wang
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Guoying Bing
- Department of Anatomy and Neurobiology, University of Kentucky, School of Medicine, Lexington, KY, USA
| | - Lingling Zhao
- Department of Pediatrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China.
| |
Collapse
|
20
|
Richendrfer H, Creton R. Chlorpyrifos and malathion have opposite effects on behaviors and brain size that are not correlated to changes in AChE activity. Neurotoxicology 2015; 49:50-8. [PMID: 25983063 DOI: 10.1016/j.neuro.2015.05.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 05/05/2015] [Accepted: 05/06/2015] [Indexed: 11/26/2022]
Abstract
Organophosphates, a type of neurotoxicant pesticide, are used globally for the treatment of pests on croplands and are therefore found in a large number of conventional foods. These pesticides are harmful and potentially deadly if ingested or inhaled in large quantities by causing a significant reduction in acetylcholinesterase (AChE) activity in the central and peripheral nervous system. However, much less is known about the effects of exposure to small quantities of the pesticides on neural systems and behavior during development. In the current study we used zebrafish larvae in order to determine the effects of two of the most widely used organophosphates, chlorpyrifos and malathion, on zebrafish behavior and AChE activity. Embryos and larvae were exposed to the organophosphates during different time points in development and then tested at 5 days post-fertilization for behavioral, neurodevelopmental and AChE abnormalities. The results of the study indicate that chlorpyrifos and malathion cause opposing behaviors in the larvae such as swim speed (hypoactivity vs. hyperactivity) and rest. Additionally, the pesticides affect only certain behaviors, such as thigmotaxis, during specific time points in development that are unrelated to changes in AChE activity. Larvae treated with malathion but not chlorpyrifos also had significantly smaller forebrain and hindbrain regions compared to controls by 5 days post-fertilization. We conclude that exposure to very low concentrations of organophosphate pesticides during development cause abnormalities in behavior and brain size.
Collapse
Affiliation(s)
- Holly Richendrfer
- Brown University, Department of Molecular and Cellular Biology and Biochemistry, Providence, RI 02912, United States.
| | - Robbert Creton
- Brown University, Department of Molecular and Cellular Biology and Biochemistry, Providence, RI 02912, United States
| |
Collapse
|