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Hamed M, Martyniuk CJ, Naguib M, Lee JS, Sayed AEDH. Neurotoxic effects of different sizes of plastics (nano, micro, and macro) on juvenile common carp (Cyprinus carpio). Front Mol Neurosci 2022; 15:1028364. [PMID: 36340695 PMCID: PMC9630652 DOI: 10.3389/fnmol.2022.1028364] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 09/29/2022] [Indexed: 12/02/2022] Open
Abstract
Using common carp as a model, we assessed the effects of polyethylene (PE) plastics on the brain. We measured activity of acetylcholinesterase (AChE), monoamine oxidase (MAO), and the content of nitric oxide (NO) in carp brain following exposure to 100 mg/L of either macroplastics (MaP), microplastics (MPs), or nanoplastic (NPs) for 15 days compared to an unexposed group. Following exposure, each biochemical biomarker was reduced 30–40%, with a higher magnitude of change corresponding to the smaller size of the particles (NPs > MPs > MaPs). In the carp tectum, exposure for 15 days to plastic particles caused varying degrees of necrosis, fibrosis, changes in blood capillaries, tissue detachment, edema, degenerated connective tissues, and necrosis in large cerebellar neurons and ganglion cells. In the carp retina, there was evidence for necrosis, degeneration, vacuolation, and curvature in the inner layer. Here we provide evidence that exposure to plastic particles can be associated with neurotoxicity in common carp.
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Affiliation(s)
- Mohamed Hamed
- Department of Zoology, Faculty of Science, Al-Azhar University (Assiut Branch), Asyut, Egypt
| | - Christopher J. Martyniuk
- Interdisciplinary Program in Biomedical Sciences Neuroscience, Department of Physiological Sciences, Center for Environmental and Human Toxicology, College of Veterinary Medicine, UF Genetics Institute, University of Florida, Gainesville, FL, United States
| | - Mervat Naguib
- Department of Zoology, Faculty of Science, Assiut University, Asyut, Egypt
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon, South Korea
| | - Alaa El-Din H. Sayed
- Department of Zoology, Faculty of Science, Assiut University, Asyut, Egypt
- *Correspondence: Alaa El-Din H. Sayed, ; orcid.org/0000-0001-7487-4729
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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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3
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Zakharova MN, Bakulin IS, Abramova AA. Toxic Damage to Motor Neurons. NEUROCHEM J+ 2021. [DOI: 10.1134/s1819712421040164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract—Amyotrophic lateral sclerosis (ALS) is a multifactor disease in the development of which both genetic and environmental factors play a role. Specifically, the effects of organic and inorganic toxic substances can result in an increased risk of ALS development and the acceleration of disease progression. It was described that some toxins can induce potentially curable ALS-like syndromes. In this case, the specific treatment for the prevention of the effects of the toxic factor may result in positive clinical dynamics. In this article, we review the main types of toxins that can damage motor neurons in the brain and spinal cord leading to the development of the clinical manifestation of ALS, briefly present historical data on studies on the role of toxic substances, and describe the main mechanisms of the pathogenesis of motor neuron disease associated with their action.
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Abd-Elkareem M, Abd El-Rahman MAM, Khalil NSA, Amer AS. Antioxidant and cytoprotective effects of Nigella sativa L. seeds on the testis of monosodium glutamate challenged rats. Sci Rep 2021; 11:13519. [PMID: 34188150 PMCID: PMC8242002 DOI: 10.1038/s41598-021-92977-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 06/14/2021] [Indexed: 02/06/2023] Open
Abstract
Monosodium glutamate (MSG) is one of the most widely spread food additives that might cause male infertility. However, Nigella sativa L. seeds (NSS) could provide a solution. This study was designed to investigate the potential effects of NSS on rats ingesting MSG. To achieve this aim, adult male albino rats were randomly equally assigned into three groups for 21 days: control group received no treatment, MSG group received MSG as 30 g/kg feed, and MSG + NSS group received MSG as 30 g/kg and NSS as 30 g/kg feed. Testis histomorphometry showed marked deterioration by MSG as atrophic seminiferous tubules with degeneration of their lining cells, damaged Leydig cells and decreased germ cells number. Periodic Acid Schiff stain indicated irregular interrupted basement membranes. Glutathione reductase, superoxide dismutase 2 (SOD2), and caspase-3 immuno-expressions increased in testicular cells. Testosterone levels were significantly decreased in MSG challenged rats along with significant increase in luteinizing hormone levels, whereas NSS normalized this hormonal profile. MSG exposure also caused significantly increased lipid peroxides (LPO), glutathione-S-transferase, and total antioxidant capacity (TAC) whereas nitric oxide and SOD2 were significantly decreased. NSS succeeded in rebalance LPO and TAC and ameliorated the histoarchitectural disturbances. NSS mitigated MSG-induced testicular impairment by its antioxidant and cytoprotective activities.
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Affiliation(s)
- Mahmoud Abd-Elkareem
- grid.252487.e0000 0000 8632 679XDepartment of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Mokhless A. M. Abd El-Rahman
- grid.252487.e0000 0000 8632 679XDepartment of Food Science and Technology, Faculty of Agriculture, Assiut University, Assiut, Egypt
| | - Nasser S. Abou Khalil
- grid.252487.e0000 0000 8632 679XDepartment of Medical Physiology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Ayman S. Amer
- grid.252487.e0000 0000 8632 679XDepartment of Human Anatomy and Embryology, Faculty of Medicine, Assiut University, Assiut, Egypt
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Mani MS, Joshi MB, Shetty RR, DSouza VL, Swathi M, Kabekkodu SP, Dsouza HS. Lead exposure induces metabolic reprogramming in rat models. Toxicol Lett 2020; 335:11-27. [PMID: 32949623 DOI: 10.1016/j.toxlet.2020.09.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 08/14/2020] [Accepted: 09/12/2020] [Indexed: 11/17/2022]
Abstract
Lead is a toxin of great public health concern affecting the young and aging population. Several factors such as age, gender, lifestyle, dose, and genetic makeup result in interindividual variations to lead toxicity mainly due to variations in metabolic consequences. Hence, the present study aimed to examine dose-dependent lead-induced systemic changes in metabolism using rat model by administering specific doses of lead such as 10 (low lead; L-Pb), 50 (moderate lead; M-Pb), and 100 mg/kg (high lead; H-Pb) body weight for a period of one month. Biochemical and haematological analysis revealed that H-Pb was associated with low body weight and feed efficiency, low total protein levels (p ≤ 0.05), high blood lead (Pb-B) levels (p ≤ 0.001), low ALAD (δ-aminolevulinate dehydratase) activity (p ≤ 0.0001), high creatinine (p ≤ 0.0001) and blood urea nitrogen (BUN) (p ≤ 0.01) levels, elevated RBC and WBC counts, reduced haemoglobin and blood cell indices compared to control. Spatial learning and memory test revealed that H-Pb exposed animals presented high latency to the target quadrant and escape platform compared to other groups indicating H-Pb alters cognition function in rats. Histopathological changes were observed in liver and kidney as they are the main target organs of lead toxicity. LC-MS analysis further revealed that Butyryl-L-carnitine (p ≤ 0.01) and Ganglioside GD2 (d18:0/20:0) (p ≤ 0.05) levels were significantly reduced in H-Pb group compared to all groups. Further, pathway enrichment analysis revealed abundance and significantly modulated metabolites associated with oxidative stress pathways. The present study is the first in vivo model of dose-dependent lead exposure for serum metabolite profiling.
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Affiliation(s)
- Monica Shirley Mani
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
| | - Manjunath B Joshi
- Department of Ageing, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
| | - Rashmi R Shetty
- Department of Pathology, Melaka Manipal Medical College, Manipal Academy of Higher Education, Manipal, Karnataka, India.
| | - Venzil Lavie DSouza
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
| | - M Swathi
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
| | - Shama Prasada Kabekkodu
- Department of Cellular and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
| | - Herman Sunil Dsouza
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
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Casjens S, Pesch B, van Thriel C, Zschiesche W, Behrens T, Weiss T, Pallapies D, Arendt M, Dragano N, Moebus S, Jöckel KH, Brüning T. Associations between blood lead, olfaction and fine-motor skills in elderly men: Results from the Heinz Nixdorf Recall Study. Neurotoxicology 2018; 68:66-72. [DOI: 10.1016/j.neuro.2018.06.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/27/2018] [Accepted: 06/27/2018] [Indexed: 12/24/2022]
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Butt UJ, Shah SAA, Ahmed T, Zahid S. Protective effects of Nigella sativa L. seed extract on lead induced neurotoxicity during development and early life in mouse models. Toxicol Res (Camb) 2018; 7:32-40. [PMID: 30090560 PMCID: PMC6060688 DOI: 10.1039/c7tx00201g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 10/04/2017] [Indexed: 01/28/2023] Open
Abstract
Lead (Pb), a ubiquitous heavy metal and a known neurotoxicant, produces adverse effects on the brain via increased production of reactive oxygen species (ROS) and causes oxidative stress. In this study we examined the neuroprotective effects of the ethanolic extract of Nigella sativa L. seeds on Pb induced oxidative stress in the developing brain of mice. Mouse pups were exposed to low (0.1%) and high (0.2%) doses of Pb from the first day of pregnancy through their mothers (via drinking water) and lactation until post-natal day (PND) 21. The mRNA expression levels of superoxide dismutase (SOD1), peroxiredoxin (Prdx6), amyloid precursor protein (APP) common, APP695 and APP770 were examined in the cortex and hippocampus of the mouse brain excised on PND 21 by semi-quantitative RT-PCR. The free radical scavenging activity of ethanolic Nigella sativa L. extract was assessed by DPPH assay. The results showed that Pb exposure caused a significant decrease in the expression of SOD1, Prdx6 and APP695 and an increase in APP770 in both cortex and hippocampus in a dose dependent manner as compared to the control group. The expression of APP common remained unaltered. Histological assessment of the cortex and hippocampus demonstrated a decrease in the neuronal number and Nissl bodies. The administration of 250 and 500 mg kg-1 ethanolic Nigella sativa L. extract reversed the adverse effects by significantly increasing the expression of SOD1, Prdx6 and APP695 and decreasing the expression of APP770 in both the regions. These results strongly suggest that Nigella sativa L. supplementation greatly improves Pb-induced neurotoxicity in early life and provides neuroprotective and antioxidant potentials.
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Affiliation(s)
- Umer Javed Butt
- Neurobiology Research Laboratory , Department of Healthcare Biotechnology , Atta-ur-Rahman School of Applied Biosciences , National University of Sciences and Technology , Islamabad , Pakistan . ; ; Tel: +92-51-90856134
| | - Syed Adnan Ali Shah
- Faculty of Pharmacy , Universiti Teknologi MARA Puncak Alam Campus , 42300 Bandar Puncak Alam , Selangor D. E. , Malaysia
- Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns) , Universiti Teknologi MARA Puncak Alam Campus , 42300 Bandar Puncak Alam , Selangor D. E. , Malaysia
| | - Touqeer Ahmed
- Neurobiology Research Laboratory , Department of Healthcare Biotechnology , Atta-ur-Rahman School of Applied Biosciences , National University of Sciences and Technology , Islamabad , Pakistan . ; ; Tel: +92-51-90856134
| | - Saadia Zahid
- Neurobiology Research Laboratory , Department of Healthcare Biotechnology , Atta-ur-Rahman School of Applied Biosciences , National University of Sciences and Technology , Islamabad , Pakistan . ; ; Tel: +92-51-90856134
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Alvarez-Ortega N, Caballero-Gallardo K, Olivero-Verbel J. Low blood lead levels impair intellectual and hematological function in children from Cartagena, Caribbean coast of Colombia. J Trace Elem Med Biol 2017; 44:233-240. [PMID: 28965581 DOI: 10.1016/j.jtemb.2017.08.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Revised: 07/25/2017] [Accepted: 08/07/2017] [Indexed: 02/08/2023]
Abstract
Lead produces numerous biochemical and physiological changes in humans, including hematological disorders, toxic effects on the central nervous system and in the function of several organs. The aim of this study was to determine blood lead levels (BLL) in children from Cartagena, Colombia, associating those with hematological and liver damage markers, the intelligence quotient (IQ), as well as with gene expression of the aminolevulinate dehydratase (ALAD), superoxide dismutase 1 (SOD1), gamma interferon (INF-γ), tumor necrosis factor (TNF) and tumor protein (p53). To achieve this purpose, 118 blood samples were collected from children 5-16 years old, with their respective informed consent from their parents. BLL was measured by atomic absorption; hematological parameters were obtained with automated systems; plasma was utilized to analyze hepatic toxicity markers, alanine aminotransferase (ALT), gamma-glutamyltransferase (γ-GT) and alkaline phosphatase (ALP); the Kaufman Brief Intelligence Test (K-BIT) was administered to measure the IQ; and gene expression was quantified from blood RNA. The mean BLL was 1.7±0.3μg/dL. A low proportion of the children (3.4%) had BLL above the CDC recommended limit (5μg/dL). BLL were correlated weakly, but negatively with child age, weight, height, body mass index, platelets wide distribution, mean platelet volume, γ-GT and IQ. There were not significant changes in the expression of evaluated genes. These results support the hypothesis that BLL below 5μg/dL may still be a detrimental factor on children's cognitive abilities, development and hematology, in line with recent concerns that there is no safe level of pediatric lead exposure.
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Affiliation(s)
- Neda Alvarez-Ortega
- Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, Zaragocilla Campus, University of Cartagena, Cartagena 130015, Colombia
| | - Karina Caballero-Gallardo
- Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, Zaragocilla Campus, University of Cartagena, Cartagena 130015, Colombia
| | - Jesus Olivero-Verbel
- Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, Zaragocilla Campus, University of Cartagena, Cartagena 130015, Colombia.
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Corsetti G, Romano C, Stacchiotti A, Pasini E, Dioguardi FS. Endoplasmic Reticulum Stress and Apoptosis Triggered by Sub-Chronic Lead Exposure in Mice Spleen: a Histopathological Study. Biol Trace Elem Res 2017; 178:86-97. [PMID: 28012149 DOI: 10.1007/s12011-016-0912-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 12/05/2016] [Indexed: 10/20/2022]
Abstract
Lead (Pb) is an environmental oncogenic metal that induces immunotoxicity and anaemia. Emerging evidence has linked Pb toxicity with endoplasmic reticulum-driven apoptosis and autophagy. Glucose-regulated protein of 78 kDa (Grp78 or binding immunoglobulin protein (BiP)), a master endoplasmic reticulum chaperone, drives macrophage activation and regulates protein folding and calcium flux in response to heavy metals. The spleen may be involved in Pb poisoning due to its crucial role in erythrocatheresis and immune response, although there are no data to support this theory. Here, we found haematic and histopathological changes in the spleen of mice exposed to medium doses of Pb acetate (200 ppm-1 mM) in drinking water for 45 days. Pb deposition was also detected in organs such as the liver, kidney, brain, bone, blood and faeces, indicating an accumulation of this metal despite relatively short exposure time. Blood Pb content (BBL) reached 21.6 μg/dL; echinocytes and poikilocytes were found in Pb smears of treated group. Inside the spleen, higher Fe(II) and Fe(III) deposits inside macrophages were observed. Grp78 immunostaining, weakly expressed in spleen cells of control mice, after Pb exposure was specifically restricted to macrophages and megakaryocytes of the marginal zone of red pulp. Furthermore, Pb exposure induced superoxide dismutase 1 (SOD1) expression, cleaved caspase-3 and p62/SQSTM1, consistent with oxidative stress, apoptosis and dysregulated autophagy in spleen compartments. We suggest that even at a middle dose, oral Pb intake induces oxidant iron deposition in the spleen and that this may trigger sustained Grp78 redistribution to cells, thus leading to oxidative and autophagy dysfunction as early local reactions to this dangerous metal.
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Affiliation(s)
- Giovanni Corsetti
- Department of Clinical and Experimental Sciences, Division of Anatomy and Physiopathology, University of Brescia, Viale Europa 11, 25123, Brescia, Italy.
| | - Claudia Romano
- Department of Clinical and Experimental Sciences, Division of Anatomy and Physiopathology, University of Brescia, Viale Europa 11, 25123, Brescia, Italy
| | - Alessandra Stacchiotti
- Department of Clinical and Experimental Sciences, Division of Anatomy and Physiopathology, University of Brescia, Viale Europa 11, 25123, Brescia, Italy.
| | - Evasio Pasini
- "S. Maugeri Foundation", IRCCS, Cardiology Division, Lumezzane Medical Centre, Brescia, Italy
| | - Francesco S Dioguardi
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
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Noel J, Habib ARR, Thamboo A, Patel ZM. Variables associated with olfactory disorders in adults: A U.S. population-based analysis. World J Otorhinolaryngol Head Neck Surg 2017; 3:9-16. [PMID: 29204574 PMCID: PMC5683598 DOI: 10.1016/j.wjorl.2017.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 02/08/2017] [Accepted: 02/13/2017] [Indexed: 01/11/2023] Open
Abstract
Objective Olfactory dysfunction is known to have significant social, psychological, and safety implications. Despite increasingly recognized prevalence, potential risk factors for olfactory loss have been arbitrarily documented and knowledge is limited in scale. The aim of this study is to identify potential demographic and exposure variables correlating with olfactory dysfunction. Methods Cross-sectional analysis of the 2011–2012 and 2013–2014 editions of the National Health Examination and Nutrition Survey was performed. The utilized survey reports from a nationally representative sample of about 5000 persons each year located in counties across the United States. There is an interview and physical examination component which includes demographic, socioeconomic, dietary, and health-related questions as well as medical, dental, physiologic measurements, and laboratory tests. 3594 adult respondents from 2011 to 2012 and 3708 respondents from 2013 to 2014 were identified from the above population-based database. The frequency of self-reported disorders as well as performance on odor identification testing was determined in relation to demographic factors, occupational or environmental exposures, and urinary levels of environmental and industrial compounds. Results In both subjective and objective analysis, smell disorders were significantly more common with increasing age. While the non-Hispanic Black and non-Hispanic Asian populations were less likely to report subjective olfactory loss, they, along with Hispanics, performed more poorly on odor identification than Caucasians. Those with limited education had a decreased prevalence of hyposmia. Women outperformed men on smell testing. Those reporting exposure to vapors were more likely to experience olfactory dysfunction, and urinary levels of manganese, 2-Thioxothiazolidine-4-carboxylic acid, and 2-Aminothiazoline-4-carboxylic acid were lower among respondents with subjective smell disturbance. In odor detection, elevated serum levels of lead and urinary levels of 2,4 dichlorophenol were associated with anosmia and hyposmia, respectively. Conclusions This study provides current, population-based data identifying demographic and exposure elements related to smell disturbances in U.S. adults. Age, race, gender, education, exposure to vapors, urinary levels of manganese, 2-Thioxothiazolidine-4-carboxylic acid, 2-Aminothiazoline-4-carboxylic acid, 2,4 dichlorophenol, and serum lead levels were all implicated in smell disturbance. Care should be taken in interpretation due to lack of consistency between subjective and objective measures of olfaction as well as limitations related to population-based data. Prospective trials are indicated to further elucidate these relationships.
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Affiliation(s)
- Julia Noel
- Department of Otolaryngology, Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Road, Palo Alto, CA 94305, USA
| | - Al-Rahim R Habib
- Sydney Medical Program, University of Sydney, Edward Ford Building A27, Sydney, New South Wales 2006, Australia
| | - Andrew Thamboo
- Department of Otolaryngology, Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Road, Palo Alto, CA 94305, USA
| | - Zara M Patel
- Department of Otolaryngology, Head & Neck Surgery, Stanford University School of Medicine, 801 Welch Road, Palo Alto, CA 94305, USA
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Mu WN, Li ZH, Zhong LQ, Wu YH. Effect of Tributyltin, Cadmium, and Their Combination on Physiological Responses in Juvenile Grass Carp. JOURNAL OF AQUATIC ANIMAL HEALTH 2016; 28:181-186. [PMID: 27484920 DOI: 10.1080/08997659.2016.1185049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Tributyltin (TBT) and cadmium (Cd) are two common pollutants in aquatic environments. This study was designed to examine the physiological responses of juvenile Grass Carp Ctenopharyngodon idella to TBT, Cd, and their combination. Fish were apportioned into a control group, a TBT group (7.5 μg/L), a Cd group (2.97 mg/L), and a TBT-Cd group (7.5 μg/L TBT, 2.97 mg/L Cd(2+)) for 7 d. The following activities were measured: Na(+),K(+)-ATPase in gill tissues; nitric oxide synthase (NOS), acetylcholinesterase (AChE), and monoamine oxidase (MAO) in brain tissues; and lipid peroxidation (LPO), malondialdehyde (MDA), total antioxidative capacity (T-AOC), and glutathione (GSH) in liver tissues. Cadmium-induced stress was suggested by alterations in antioxidant responses (MDA, LPO, and T-AOC) and neurological parameters (AChE, MAO, and NOS). Cadmium also induced Na(+),K(+)-ATPase and GSH activity. Compared with the responses among the Cd group, the combination of TBT and Cd not only decreased the level of GSH and Na(+),K(+)-ATPase but also increased the levels of MDA, LPO, AChE, MAO, and NOS. These results suggest that a combination of TBT and Cd could reduce the adverse effects of Cd on Grass Carp. However, the exact mechanisms for the combined effects TBT and Cd on these biomarkers require further investigation. Received September 28, 2015; accepted April 17, 2016.
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Affiliation(s)
- Wei-Na Mu
- a College of Fisheries , Huazhong Agricultural University , Wuhan , Hubei 430070 , China
- b Ministry of Agriculture , Key Field Station for Fishery Resources and the Environment in Upper-Middle Reaches of the Yangtze River and Key Laboratory of Freshwater Biodiversity Conservation , Wuhan 430223 , China
- c Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences , Wuhan 430223 , China
| | - Zhi-Hua Li
- b Ministry of Agriculture , Key Field Station for Fishery Resources and the Environment in Upper-Middle Reaches of the Yangtze River and Key Laboratory of Freshwater Biodiversity Conservation , Wuhan 430223 , China
- c Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences , Wuhan 430223 , China
- d Research Institute of Fish Culture and Hydrobiology , University of South Bohemia in Ceske Budejovice , Zátiší 728/II, 389 25 Vodňany , Czech Republic
| | - Li-Qiao Zhong
- b Ministry of Agriculture , Key Field Station for Fishery Resources and the Environment in Upper-Middle Reaches of the Yangtze River and Key Laboratory of Freshwater Biodiversity Conservation , Wuhan 430223 , China
- c Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences , Wuhan 430223 , China
| | - Yan-Hua Wu
- b Ministry of Agriculture , Key Field Station for Fishery Resources and the Environment in Upper-Middle Reaches of the Yangtze River and Key Laboratory of Freshwater Biodiversity Conservation , Wuhan 430223 , China
- c Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences , Wuhan 430223 , China
- e Ministry of Education , Key Laboratory of Freshwater Fish Reproduction and Development , Chongqing 400715 , China
- f Key Laboratory of Aquatic Sciences of Chongqing, School of Life Sciences , Southwest University , Chongqing 400719 , China
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Wang MD, Gomes J, Cashman NR, Little J, Krewski D. A meta-analysis of observational studies of the association between chronic occupational exposure to lead and amyotrophic lateral sclerosis. J Occup Environ Med 2015; 56:1235-42. [PMID: 25479292 PMCID: PMC4243803 DOI: 10.1097/jom.0000000000000323] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The association between occupational exposure to lead and amyotrophic lateral sclerosis (ALS) was examined through systematic review and meta-analyses of relevant epidemiological studies and reported according to PRISMA guidelines. METHODS Relevant studies were searched in multiple bibliographic databases through September 2013; additional articles were tracked through PubMed until submission. All records were screened in DistillerSR, and the data extracted from included articles were synthesized with meta-analysis. RESULTS The risk of developing ALS among individuals with a history of exposure to lead was almost doubled (odds ratio, 1.81; 95% confidence interval, 1.39 to 2.36) on the basis of nine included case-control studies with specific lead exposure information, with no apparent heterogeneity across included studies (I = 14%). The attributable risk of ALS because of exposure to lead was estimated to be 5%. CONCLUSIONS Previous exposure to lead may be a risk factor for ALS.
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Affiliation(s)
- Ming-Dong Wang
- From the Department of Epidemiology and Community Medicine (Drs Wang, Gomes, Little, and Krewski), Faculty of Medicine, University of Ottawa, Ontario; and Department of Medicine (Dr Cashman), University of British Columbia, Vancouver, British Columbia, Canada
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Grashow R, Sparrow D, Hu H, Weisskopf MG. Cumulative lead exposure is associated with reduced olfactory recognition performance in elderly men: The Normative Aging Study. Neurotoxicology 2015; 49:158-64. [PMID: 26121922 DOI: 10.1016/j.neuro.2015.06.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 06/05/2015] [Accepted: 06/23/2015] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Olfactory dysfunction has been identified as an early warning sign for Alzheimer's disease, Parkinson's disease, dementia and more. A few occupational and environmental exposures have also been associated with reduced olfactory function, although the effects of long term environmental exposure to lead on olfactory dysfunction have not been explored. Here we performed olfactory recognition testing in elderly men in a community-dwelling cohort and examined the association with cumulative lead exposure, as assessed by lead in tibial and patellar bone. METHODS Olfactory recognition was measured in 165 men from the Normative Aging Study (NAS) who had previously taken part in bone lead measurements using K-X-ray fluorescence (KXRF). Olfactory recognition was measured using the University of Pennsylvania Smell Identification Test (UPSIT). Associations between olfactory recognition, global cognition and cumulative lead exposure were estimated using linear regression, with additional adjustment for age, smoking, and functional polymorphism status for hemochromatosis (HFE), transferrin (TfC2), glutathione-s-transferase Pi1 (GSTP1) and apolipoprotein E (APOE) genotypes. Sensitivity analyses explored olfactory recognition in men with high global cognitive function as measured using the Mini-Mental Status Exam (MMSE). RESULTS The average age of the NAS participants at the time of olfactory recognition testing was 80.3 (standard deviation or SD=5.7) years. Mean tibia lead was 16.3 (SD=12.0) μg/g bone, mean patella lead was 22.4 (SD=14.4)μg/g bone, and mean UPSIT score was 26.9 out of 40 (SD=7.0). Consistent with previous findings, age at olfaction testing was negatively associated with UPSIT score. Tibia (but not patella) bone lead was negatively associated with olfaction recognition (per 15 μg/g tibia lead: β=-1.57; 95% CI: -2.93, -0.22; p=0.02) in models adjusted for smoking and age. Additional adjustment for education did not significantly change results. Of all the genes explored, only the presence of one or more HFE variant alleles was significantly associated with olfaction recognition (HFE β=2.26; 95% CI: 0.09, 4.43; p=0.04). In a model containing the HFE term and a lead term, the tibia lead parameter estimate dropped by 21% (per 15 μg/g tibia lead: β=-1.25; 95% CI: -2.64, 0.14; p=0.08) while the HFE term dropped 15% (β=1.91; 95% CI: -0.28, 4.10; p=0.09). None of the other gene terms were associated with olfactory recognition in this cohort, nor were any gene-lead interaction terms significant. Additional sensitivity analysis in men with MMSE scores of 25 or higher (n=149) showed a similar but slightly attenuated association between lead and olfactory recognition (per 15 μg/g tibia lead β=-1.39; 95% CI: -3.00, 0.22; p=0.09). CONCLUSION Cumulative exposure to lead is associated with reduced olfactory recognition in a cohort of elderly men. The association was similar but not significant in men with better cognitive function as measured by the MMSE. Iron metabolism gene status may also affect olfactory function.
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Affiliation(s)
- Rachel Grashow
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA; Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, USA.
| | - David Sparrow
- VA Boston Healthcare System, Boston University Schools of Public Health and Medicine, Boston, MA, USA; Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Howard Hu
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | - Marc G Weisskopf
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
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Li ZH, Li P, Shi ZC. Chronic exposure to Tributyltin induces brain functional damage in juvenile common carp (Cyprinus carpio). PLoS One 2015; 10:e0123091. [PMID: 25879203 PMCID: PMC4399936 DOI: 10.1371/journal.pone.0123091] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 02/27/2015] [Indexed: 11/21/2022] Open
Abstract
The aim of the present study was to investigate the effect of Tributyltin (TBT) on brain function and neurotoxicity of freshwater teleost. The effects of long-term exposure to TBT on antioxidant related indices (MDA, malondialdehyde; SOD, superoxide dismutase; CAT, catalase; GR, glutathione reductase; GPx, glutathione peroxidase), Na+-K+-ATPase and neurological parameters (AChE, acetylcholinesterase; MAO, monoamine oxidase; NO, nitric oxide) in the brain of common carp were evaluated. Fish were exposed to sublethal concentrations of TBT (75 ng/L, 0.75 μg/L and 7.5 μg/L) for 15, 30, and 60 days. Based on the results, a low level and short-term TBT-induced stress could not induce the notable responses of the fish brain, but long-term exposure (more than 15 days) to TBT could lead to obvious physiological-biochemical responses (based on the measured parameters). The results also strongly indicated that neurotoxicity of TBT to fish. Thus, the measured physiological responses in fish brain could provide useful information to better understand the mechanisms of TBT-induced bio-toxicity.
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Affiliation(s)
- Zhi-Hua Li
- Key Laboratory of Freshwater Biodiversity Conservation (Ministry of Agriculture), Key Field Station for Fishery Resource and Environment in Upper-Middle Reaches of Yangtze River (Ministry of Agriculture), Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
- University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Zátiší 728/II, 389 25 Vodňany, Czech Republic
- * E-mail:
| | - Ping Li
- Key Laboratory of Freshwater Biodiversity Conservation (Ministry of Agriculture), Key Field Station for Fishery Resource and Environment in Upper-Middle Reaches of Yangtze River (Ministry of Agriculture), Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
- University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Zátiší 728/II, 389 25 Vodňany, Czech Republic
| | - Ze-Chao Shi
- Key Laboratory of Freshwater Biodiversity Conservation (Ministry of Agriculture), Key Field Station for Fishery Resource and Environment in Upper-Middle Reaches of Yangtze River (Ministry of Agriculture), Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
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Lalith Kumar V. Ameliorative effects of ferulic Acid against lead acetate-induced oxidative stress, mitochondrial dysfunctions and toxicity in prepubertal rat brain. Neurochem Res 2014; 39:2501-15. [PMID: 25322819 DOI: 10.1007/s11064-014-1451-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/04/2014] [Accepted: 10/07/2014] [Indexed: 01/23/2023]
Abstract
Epidemiological evidence has shown higher susceptibility of Children to the adverse effects of lead (Pb) exposure. However, experimental studies on Pb-induced neurotoxicity in prepubertal (PP) rats are limited. The present study aimed to examine the propensity of ferulic acid (FA), a commonly occurring phenolic acid in staple foods (fruits, vegetables, cereals, coffee etc.) to abrogate Pb-induced toxicity. Initially, we characterized Pb-induced adverse effects among PP rats exposed to Pb acetate (1,000-3,000 ppm in drinking water) for 5 weeks in terms of locomotor phenotype, activity of 5-aminolevulinic acid dehydratase (ALAD) in the blood, blood Pb levels and oxidative stress in brain regions. Further, the ameliorative effects of oral supplements of FA (25 mg/kg bw/day) were investigated in PP rats exposed to Pb (3,000 ppm). Pb intoxication increased the locomotor activity and FA supplements partially reversed the phenotype, while the reduced ALAD activity was also restored. FA significantly abrogated the enhanced oxidative stress in cerebellum (Cb) and hippocampus (Hc) as evidenced in terms of ROS generation, lipid peroxidation and protein carbonyls. Further, Pb-mediated perturbations in the glutathione levels and activity of enzymic antioxidants were also markedly restored. Furthermore, the protective effect of FA was discernible in striatum in terms of reduced oxidative stress, restored cholinergic activity and dopamine levels. Interestingly, reduced activity levels of mitochondrial complex I in Cb and enhanced levels in Hc among Pb-intoxicated rats were ameliorated by FA supplements. FA also decreased the number of damaged cells in cornu ammonis area CA1 and dentate gyrus as reflected by the histoarchitecture of Hc among Pb intoxicated rats. Collectively, our findings in the PP model allow us to hypothesize that ingestion of common phenolics such as FA may significantly alleviate the neurotoxic effects of Pb which may be largely attributed to its ability to abrogate oxidative stress.
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Affiliation(s)
- Venkareddy Lalith Kumar
- Department of Biochemistry and Nutrition, CSIR-Central Food Technological Research Institute (CFTRI), Mysore, 570020, India
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Harisa GI. Mitigation of lead-induced neurotoxicity by the naringin: erythrocytes as neurons substitute markers. Biol Trace Elem Res 2014; 159:99-106. [PMID: 24828744 DOI: 10.1007/s12011-014-9996-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 04/24/2014] [Indexed: 12/31/2022]
Abstract
This study aimed to investigate the effect of lead (Pb) on neuronal nitric oxide synthase (nNOS) activity using erythrocytes as neurons surrogate markers. Moreover, the protective effect of naringin (NAR) against lead acetate (PbAc)-induced neurotoxicity was investigated. Human erythrocytes were incubated with L-arginine (L-Arg), Nω-nitro-L-Arginine methyl ester ( L-NAME), NAR, PbAc, PbAc+L-Arg, PbAc+NAR, or PbAc+L-Arg+NAR. The present results revealed that incubation of erythrocytes with PbAc inhibited NOS activity and decreased nitrite levels as an index for nitric oxide (NO) production to values similar that of L-NAME as known NOS inhibitor. Likewise, PbAc induced a significant decrease in activities of ATPases and acetylcholinesterase compared to control cells. Furthermore, PbAc exposure significantly increased protein carbonyl content (PCC) and malondialdehyde (MDA) levels while significantly decrease the levels of reduced glutathione (GSH). On the contrary, incubation of erythrocytes with PbAc in the presence of L-Arg+NAR synergistically ameliorated the investigated parameters compared to erythrocytes incubated with PbAc alone. These data suggest that NAR can restore NO bioavailability in a situation of Pb-induced cellular damage. This attributed to antioxidant activity and restoration NOS activity.
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Affiliation(s)
- Gamaleldin I Harisa
- Department of Pharmaceutics, Kayyali Chair for Pharmaceutical Industry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia,
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Liu CM, Zheng GH, Cheng C, Sun JM. Quercetin protects mouse brain against lead-induced neurotoxicity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:7630-7635. [PMID: 23855546 DOI: 10.1021/jf303387d] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Quercetin (QE), the major bioflavonoid in the human diet, has been reported to have many benefits and medicinal properties. However, its protective effects against lead (Pb)-induced neurotoxicity have not been clarified. The aim of the present study was to investigate the effects of QE on neurotoxicity in mice exposed to Pb. Mice were exposed to lead acetate (20 mg/kg body weight/day) intragastrically with or without QE (15 and 30 mg/kg body weight/day) coadministration for 3 months. The data showed that QE significantly prevented Pb-induced neurotoxicity in a dose-dependent manner. Exploration of the underlying mechanisms of QE action revealed that QE administration decreased Pb contents in blood (13.2, 19.1%) and brain (17.1, 20.0%). QE markedly increased NO production (39.1, 61.1%) and PKA activity (51.0, 57.8%) in brains of Pb-treated mice. Additionally, QE remarkably suppressed Pb-induced oxidative stress in mouse brain. Western blot analysis showed that QE increased the phosphorylations of Akt, CaMKII nNOS, eNOS, and CREB in brains of Pb-treated mice. The results suggest that QE can inhibit Pb-induced neurotoxicity and partly restore PKA, Akt, NOS, CaMKII, and CREB activities.
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Affiliation(s)
- Chan-Min Liu
- School of Life Science, Jiangsu Normal University , No. 101 Shanghai Road, Tangshan New Area, Xuzhou City 221116, Jiangsu Province, People's Republic of China
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Liu CM, Zheng GH, Ming QL, Sun JM, Cheng C. Protective effect of puerarin on lead-induced mouse cognitive impairment via altering activities of acetyl cholinesterase, monoamine oxidase and nitric oxide synthase. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2013; 35:502-10. [PMID: 23501611 DOI: 10.1016/j.etap.2013.02.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 02/01/2013] [Accepted: 02/03/2013] [Indexed: 05/25/2023]
Abstract
Puerarin (PU), a natural flavonoid, has been reported to have many benefits and medicinal properties. The present study aimed to investigate the protective effects of puerarin on neurotoxicity in mice exposed to lead. ICR mice were exposed to lead acetate in the drinking water (500 ppm) with or without puerarin coadministration (100 and 200 mgPU/kg intragastrically once daily) for three months. We found puerarin significantly prevented Pb-induced neurotoxicity in a dose-dependent manner, indicated by behavioral indicators. Puerarin also decreased Pb contents in blood and brain. Puerarin increased activities of acetyl cholinesterase (AChE) and monoamine oxidase (MAO) in brain of Pb-treated mice. Moreover, Pb-induced profound elevation of oxidative stress, as evidenced by increasing of lipid peroxidation level and depleting of total antioxidant capacity in brain, were suppressed by treatment with puerarin. Puerarin markedly increased NO production and PKA activity in brain of Pb-treated mice. Western blot analysis showed that puerarin dramatically increased the expression levels of nNOS, eNOS and phosphor-Akt in brains of Pb-treated mice. In conclusion, these results suggested that puerarin can inhibit Pb-induced neurotoxicity, at least in part, by suppressing oxidative stress, reversing the Pb-induced alterations in transmitters and enzymes and modulating the PKA/Akt/NOS signaling pathway.
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Affiliation(s)
- Chan-Min Liu
- School of Life Science, Jiangsu Normal University, No. 101, Shanghai Road, Tangshan New Area, Xuzhou City 221116, Jiangsu Province, PR China.
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Zizza M, Giusi G, Crudo M, Canonaco M, Facciolo RM. Lead-induced neurodegenerative events and abnormal behaviors occur via ORXRergic/GABA(A)Rergic mechanisms in a marine teleost. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 126:231-241. [PMID: 23246865 DOI: 10.1016/j.aquatox.2012.11.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 10/30/2012] [Accepted: 11/10/2012] [Indexed: 06/01/2023]
Abstract
The hindering effects of metals and in particular lead (Pb) are representing a growing threat to aquatic organisms such as fish. This observation derives from toxic concentrations of Pb accounting for altered neurophysiological activities of some interesting teleost models like Thalassoma pavo, a fish species highly known for its host-cleaning symbiosis. In this study, the nominal PbNO(3) concentration of 1.6 mg/L was capable of reducing feeding and resting bouts as early as 24 h of exposure while hyperactive swimming episodes were also detected. Such abnormal behaviors were tightly correlated to up-regulated orexin receptor (ORXR) mRNA expression levels in some brain areas such as the lateral thalamic nucleus (+213%) and the optic tectum (+90%) with respect to controls. Interestingly, these transcriptional effects seemed to be attenuated when Pb-exposed fish received either 100 ng/g of ORX-A (-70%) or 0.1 μg/g of γ-aminobutyric acid(A) receptor (GABA(A)R) agonist muscimol (MUS; -97%) compared to fish exposed to Pb alone. Moreover, a net neurodegenerative process of the different brain areas was reported after Pb exposure as displayed by their marked amino cupric silver stained cells while these cells were devoid of any staining reaction after treatment with MUS only. Conversely, addition of the GABA(A)R antagonist bicuculline (BIC; 1 μg/g) moderately (p<0.05) enhanced Pb-dependent behavioral and neurodegenerative actions. Overall, these first indications strongly point to altered ORXR/GABA(A)R interactions during neurotoxic events of a metal that by evoking harmful neurobiological dysfunctions may endanger the survival of commercially valuable fish with eventual repercussions on human health.
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Affiliation(s)
- Merylin Zizza
- Comparative Neuroanatomy Laboratory, Ecology Department, University of Calabria, Italy
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Kasperczyk A, Machnik G, Dobrakowski M, Sypniewski D, Birkner E, Kasperczyk S. Gene expression and activity of antioxidant enzymes in the blood cells of workers who were occupationally exposed to lead. Toxicology 2012; 301:79-84. [DOI: 10.1016/j.tox.2012.07.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Revised: 07/01/2012] [Accepted: 07/05/2012] [Indexed: 01/29/2023]
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