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Habotta OA, Elbahnaswy S, Ibrahim I. Neurotoxicity of singular and combined exposure of Oreochromis niloticus to methomyl and copper sulphate at environmentally relevant levels: Assessment of neurotransmitters, neural stress, oxidative injury and histopathological changes. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2022; 94:103935. [PMID: 35882308 DOI: 10.1016/j.etap.2022.103935] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 07/16/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Aquatic organisms are concomitantly exposed to multiple noxious chemicals that can be discharged into water bodies. We aimed to investigate the single and simultaneous sub-acute exposure to copper and methomyl on juvenile Oreochromis niloticus. Compared to the controls, the outcomes revealed that brain of methomyl-exposed fish displayed significant declines in the activities of SOD, CAT, and GST in addition to higher MDA and lower GSH levels. Methomyl induced notable declines in levels of GABA and acetylcholine esterase in brain and muscle of exposed fish. Noteworthy downregulated gene expression levels of TNF-α, HSP-70 together with upregulated c-fos were evident in brain of fish expose to either of tested compounds. Marked apoptotic changes were observed in fish brain exposed to copper and methomyl indicated by augmented immune expression of caspase-3. Conclusively, the results indicated the possible interaction between both compounds with subsequent toxic effects that differ from their single exposure.
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Affiliation(s)
- Ola A Habotta
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt.
| | - Samia Elbahnaswy
- Department of Internal Medicine, Infectious and Fish Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Iman Ibrahim
- Department of Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
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Chen Y, Mao G, Zhang Z, Zhao T, Feng W, Yang L, Wu X. The protective effect of C3G against Pb-induced learning and memory impairments through cAMP-PKA-CREB signaling pathway in rat hippocampus. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Liu S, Wang L, Chen K, Yang H, Ling M, Wu L, Zhou X, Ma G, Bai L. Combined effects of S-metolachlor and benoxacor on embryo development in zebrafish (Danio rerio). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 238:113565. [PMID: 35512469 DOI: 10.1016/j.ecoenv.2022.113565] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 04/19/2022] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
It is necessary to study the combined toxicity of an herbicide and its safener because the two are often used in combination. S-metolachlor and its safener benoxacor have been detected in aquatic environments and can individually damage the oxidative stress system in zebrafish embryos (Danio rerio). However, only their separate toxicity in zebrafish (Danio rerio) embryo development has been reported. This study assessed the combined toxicity of benoxacor and S-metolachlor in zebrafish embryo development, including acute toxicity, developmental toxicity, oxidative damage, and cell apoptosis. The 96-h LC50 values were higher in mixtures of benoxacor and S-metolachlor than in benoxacor alone. The treatments included S-metolachlor, Mix-1 (0.1 mg/L benoxacor + 0.1 mg/L S-metolachlor), Mix-2 (0.1 mg/L benoxacor + 0.3 mg/L S-metolachlor) and benoxacor alone. Embryos exposed to Mix-1 and Mix-2 had lower developmental toxicities, superoxide dismutase (SOD) activity, osx and cat expression levels than those exposed to benoxacor alone. Moreover, glutathione S-transferase (GST), catalase (CAT), glutathione reductase (GR), glutathione peroxidase (GPx) activities, and the expressions of tbx16, nrf2, bcl2, and caspase9 were higher in the mixtures than in the benoxacor group. High-throughput RNA sequencing revealed that benoxacor had a greater effect on gene regulation than Mix-1 and Mix-2. The malformation rate, different enrichment gene numbers, and gene expression levels of hatched embryos were higher in Mix-1 than in Mix-2. The results indicate that a mixture of S-metolachlor and benoxacor has antagonistic effects in the early stage of embryo development. The mixtures can break the reactive oxygen species balance, causing abnormal cell apoptosis and developmental malformation in embryos. Besides investigating the combined toxicity of benoxacor and S-metolachlor in zebrafish embryo development, this study provides a risk assessment basis for a herbicide combined with its safener.
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Affiliation(s)
- Sihong Liu
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China
| | - Lifeng Wang
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China.
| | - Ke Chen
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China
| | - Haona Yang
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China
| | - Min Ling
- Hunan Research Academy of Environmental Sciences, Changsha, PR China
| | - Lamei Wu
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China
| | - Xiaomao Zhou
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China
| | - Guolan Ma
- State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha, PR China
| | - Lianyang Bai
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China.
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Effects of C5a and Receptor CD88 on Glutamate and N-Methyl-D-Aspartic Acid Receptor Expression in the Mouse Model of Optic Neuromyelitis. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:4997393. [PMID: 35509858 PMCID: PMC9061005 DOI: 10.1155/2022/4997393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/08/2022] [Accepted: 04/13/2022] [Indexed: 11/28/2022]
Abstract
Objective To analyze the role of C5a, C5a receptor (CD88), glutamic acid, and N-methyl-D-aspartic acid receptors (NMDAR1 and NMDAR2B) in the onset of neuromyelitis optica (NMO) disease in mice. Method To select C57BL/6 wild-type (WT) mice and C5a receptor gene knockout (C5aR-/-) mice, use NMO-IgG and hemolytic complement to intervene in spinal cord tissue sections and optic nerves to establish an NMO model in vitro. The experiment was carried out with five groups (control group, WT group, C5aR-/- group, C5a group, and C5a+C5aRA group), with six mice in each group. The differences of American spinal cord injury (ASIA) motor scores were compared among all groups. The expressions of aquaporin (AQP4), glial fibrillary acidic protein (GFAP), NMDAR1, and NMDAR2B in spinal cord and optic nerve tissues were detected. The difference of glutamic acid (Glu) concentrations in culture solutions of the spinal cord and optic nerves was compared. Result The ASIA motor score of the control group was significantly lower than that of the other four groups. The C5a-/- group was significantly higher than the WT group. The C5a+C5aRA group was significantly higher than the C5a group in terms of ASIA motor score. In the control group, AQP4 and GFAP showed expression loss. The C5aR-/- group's loss rate was significantly higher than that of the WT group. The loss rate of the C5a+C5aRA group was significantly higher than that of the C5a group. In the control group, the protein expressions of NMDAR1 and NMDAR2B were significantly lower than that of the other four groups. The C5aR-/- group was significantly higher than the WT group. The C5a+C5aRA group was significantly higher than the C5a group in protein expression. In the control group, the concentration of Glu in the C5aR-/- group was significantly higher than that in the WT group, and the C5a group was significantly lower than the C5a+C5aRA group. Conclusion The deletion of the C5a receptor promotes NMDAR activity, which affects the toxic excitatory effect of NMDAR in NMO and regulates the neurotoxic effect of glutamic acid, thus participating in the pathogenesis of NMO.
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Zolotarev KV, Mikhailov AN, Mikhailova MV, Nakhod KV, Nakhod VI, Bodoev NV, Zhdanov DD. Tissue-Specific Expression of Genes Involved in Cellular Transportation in Common Carp (Cyprinus carpio) Exposed to Cadmium. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 106:978-982. [PMID: 34021770 DOI: 10.1007/s00128-021-03270-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 05/15/2021] [Indexed: 06/12/2023]
Abstract
Juvenile common carp were treated with Cd2+ at a sublethal concentration for Cyprinidae (6.4 mg/L). The expression of N-methyl-D-aspartate receptor subunit genes (NR2A, NR2B) and ATP-binding cassette subfamily C member 1 gene (ABCC1) was compared between treated and untreated fish. In addition, cadmium accumulation in the fish tissues was assessed. NR2A was 18.9-fold upregulated by Cd2+ in the eyes (choroid + retina), which accumulated Cd, and was not upregulated in brain, which didn't accumulate Cd. This may have been caused by the blocking of calcium channels by Cd2+, which has a very similar ionic radius to that of Ca2+. ABCC1 was 2.6-fold upregulated in gills and was not upregulated in liver; both tissues accumulated high levels of Cd. This difference may have been caused by the accumulation of predominantly previously inactivated Cd in liver or by some difference in the mechanisms of self-detoxification from Cd2+ in fish gills and liver.
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Affiliation(s)
| | - Anton N Mikhailov
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow, 119121, Russia
| | - Marina V Mikhailova
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow, 119121, Russia
| | - Kirill V Nakhod
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow, 119121, Russia
| | - Valeriya I Nakhod
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow, 119121, Russia
| | - Nikolay V Bodoev
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow, 119121, Russia
| | - Dmitry D Zhdanov
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow, 119121, Russia
- Рeoples Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, Russia
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Zhou R, Zhao J, Li D, Chen Y, Xiao Y, Fan A, Chen XT, Wang HL. Combined exposure of lead and cadmium leads to the aggravated neurotoxicity through regulating the expression of histone deacetylase 2. CHEMOSPHERE 2020; 252:126589. [PMID: 32234630 DOI: 10.1016/j.chemosphere.2020.126589] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 03/10/2020] [Accepted: 03/21/2020] [Indexed: 06/11/2023]
Abstract
Lead (Pb) and cadmium (Cd) are common heavy metals in the environment, exerting detrimental effects on central nervous system. Although increasing evidence demonstrated the Pb and Cd-induced neurotoxicity, the exact epigenetic mechanisms induced by combined exposure (co-exposure) of Pb and Cd are still unclear. In this study, the neurotoxicity of individual exposure and co-exposure to Pb and Cd in vivo (150 ppm and 5 ppm respectively) and in vitro (10 μM and 0.1 μM respectively) was investigated. The results showed that neurite outgrowth was inhibited by either individual or combined exposure to Pb/Cd, whereas the co-exposure aggravated the inhibitory effect in PC12 cells. The results of Morris Water Maze (MWM), Y maze and Golgi-Cox staining showed that either Pb or Cd alone exposure damaged the ability of learning and memory and decreased the dendritic spine density in both the hippocampal CA1 and DG area of Sprague---Dawley (SD) rats, and that the co-exposure aggravated the damages. Subsequently, histone deacetylase (HDAC) 2 was significantly increased in both hippocampal tissues and PC12 cells co-exposed to Pb and Cd, and the treatment of trichostatin A (TSA) and HDAC2-knocking down construct (shHDAC2) could markedly prevent neurite outgrowth impairment in PC12 cells. In summary, HDAC2 plays essential regulatory roles in neurotoxicity induced by the co-exposure to Pb and Cd, providing a potential molecular target for neurological intervention.
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Affiliation(s)
- Ruiqing Zhou
- School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui, 230009, PR China
| | - Jing Zhao
- School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui, 230009, PR China
| | - Danyang Li
- School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui, 230009, PR China
| | - Yao Chen
- School of Pharmacy, Anhui Medical University, Hefei, Anhui, 230031, PR China
| | - Yanyan Xiao
- School of Pharmacy, Anhui Medical University, Hefei, Anhui, 230031, PR China
| | - Anni Fan
- School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui, 230009, PR China
| | - Xiang-Tao Chen
- School of Pharmacy, Anhui Medical University, Hefei, Anhui, 230031, PR China.
| | - Hui-Li Wang
- School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui, 230009, PR China.
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Gene networks and toxicity/detoxification pathways in juvenile largemouth bass (Micropterus salmoides) liver induced by acute lead stress. Genomics 2020; 112:20-31. [DOI: 10.1016/j.ygeno.2019.06.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/14/2019] [Accepted: 06/21/2019] [Indexed: 11/20/2022]
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Rahman A, Rao MS, Khan KM. Intraventricular infusion of quinolinic acid impairs spatial learning and memory in young rats: a novel mechanism of lead-induced neurotoxicity. J Neuroinflammation 2018; 15:263. [PMID: 30217162 PMCID: PMC6137743 DOI: 10.1186/s12974-018-1306-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 09/04/2018] [Indexed: 12/20/2022] Open
Abstract
Background Lead (Pb), a heavy metal, and quinolinic acid (QA), a metabolite of the kynurenine pathway of tryptophan metabolism, are known neurotoxicants. Both Pb and QA impair spatial learning and memory. Pb activates astrocytes and microglia, which in turn induce the synthesis of QA. We hypothesized increased QA production in response to Pb exposure as a novel mechanism of Pb-neurotoxicity. Methods Two experimental paradigms were used. In experiment one, Wistar rat pups were exposed to Pb via their dams’ drinking water from postnatal day 1 to 21. Control group was given regular water. In the second protocol, QA (9 mM) or normal saline (as Vehicle Control) was infused into right lateral ventricle of 21-day old rats for 7 days using osmotic pumps. Learning and memory were assessed by Morris water maze test on postnatal day 30 or 45 in both Pb- and QA-exposed rats. QA levels in the Pb exposed rats were measured in blood by ELISA and in the brain by immunohistochemistry on postnatal days 45 and 60. Expression of various molecules involved in learning and memory was analyzed by Western blot. Means of control and experimental groups were compared with two-way repeated measure ANOVA (learning) and t test (all other variables). Results Pb exposure increased QA level in the blood (by ~ 58%) and increased (p < 0.05) the number of QA-immunoreactive cells in the cortex, and CA1, CA3 and dentate gyrus regions of the hippocampus, compared to control rats. In separate experiments, QA infusion impaired learning and short-term memory similar to Pb. PSD-95, PP1, and PP2A were decreased (p < 0.05) in the QA-infused rats, whereas tau phosphorylation was increased, compared to vehicle infused rats. Conclusion Putting together the results of the two experimental paradigms, we propose that increased QA production in response to Pb exposure is a novel mechanism of Pb-induced neurotoxicity.
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Affiliation(s)
- Abdur Rahman
- Department of Food Science and Nutrition, College of Life Sciences, Kuwait University, Kuwait City, Kuwait.
| | - Muddanna S Rao
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Khalid M Khan
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
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Dipp VR, Valles S, Ortiz-Kerbertt H, Suarez JV, Bardullas U. Neurobehavioral Alterations in Zebrafish Due to Long-Term Exposure to Low Doses of Inorganic Arsenic. Zebrafish 2018; 15:575-585. [PMID: 30183563 DOI: 10.1089/zeb.2018.1627] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Inorganic arsenic (As) is one of the most ubiquitous and toxic substances with widespread health effects on human populations and biodiversity. Although arsenic is a frequent surface water pollutant, there is scant evidence about neurotoxicity in aquatic species in different stages of development. In the present study, we investigated the neurobehavioral effects of chronic exposure to environmentally relevant doses of arsenic. We exposed zebrafish to 50 and 500 ppb during the larval, juvenile, and adult stage (from 4 h to 150 days postfertilization). We then used broad behavioral screening to evaluate motor function, social behavior, learning and memory, and anxiety-like behaviors. Our results show that arsenic exposure to 500 ppb alters motor function from the embryo to the adult stage. Furthermore, during the adult phase, associative learning and the sensorimotor response are affected with both high and low doses of As, respectively. Notably, exposure to 500 ppb of As induces behaviors associated with anxiety, during the juvenile and adult phase but not the larval stage, without changes in whole-body cortisol levels. These results indicate that chronic exposure to arsenic during their lifespan is capable of producing alterations in different behavioral markers in aquatic vertebrates.
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Affiliation(s)
- Víctor René Dipp
- Laboratorio de Biología Integrativa, Facultad de Ciencias, Universidad Autónoma de Baja California (UABC) , Ensenada, México
| | - Selma Valles
- Laboratorio de Biología Integrativa, Facultad de Ciencias, Universidad Autónoma de Baja California (UABC) , Ensenada, México
| | - Héctor Ortiz-Kerbertt
- Laboratorio de Biología Integrativa, Facultad de Ciencias, Universidad Autónoma de Baja California (UABC) , Ensenada, México
| | - Julio V Suarez
- Laboratorio de Biología Integrativa, Facultad de Ciencias, Universidad Autónoma de Baja California (UABC) , Ensenada, México
| | - Ulises Bardullas
- Laboratorio de Biología Integrativa, Facultad de Ciencias, Universidad Autónoma de Baja California (UABC) , Ensenada, México
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