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Wang M, Xia Y, Ai S, Gu X, Wang HL. Kaempferol improves Pb-induced cognitive impairments via inhibiting autophagy. J Nutr Biochem 2024; 125:109556. [PMID: 38151193 DOI: 10.1016/j.jnutbio.2023.109556] [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: 09/19/2023] [Revised: 12/07/2023] [Accepted: 12/22/2023] [Indexed: 12/29/2023]
Abstract
Kaempferol (Kam) is a flavonoid antioxidant found in fruits and vegetables, which was discovered as neuroprotective antioxidants. Lead (Pb), an environmental pollution, could induce learning and memory deficits. Nevertheless, little is known about the mechanisms underlying Kam actions in Pb-induced learning and memory deficits. In this study, we investigated the effects of Kam on Pb-induced cognitive deficits. Pb-exposed rats were treated with 50 mg/kg Kam from postnatal day (PND) 30 to PND 60. Then, Y-maze and Morris water maze have been used to detect the spatial memory in all groups of rats. Hematoxylin and eosin (HE) staining and Nissl staining were used to analyze the neuronal structure damages. The results found Kam treatment improved the learning and memory ability and alleviated hippocampal neuronal pathological damages. Besides, Kam could significantly reverse the synaptic transmission related protein expression including PSD95 and NMDAR2B. Further research found that Kam downregulated autophagy markers, P62, ATG5, Beclin1, and LC3-II. Furthermore, 3-MA, autophagy inhibitor, increased the levels of NMDAR2B and PSD95 in Pb-induced PC12 cells, indicating Kam alleviated Pb-induced neurotoxicity through inhibiting autophagy activation. Our results showed that Kam could ameliorate Pb-induced cognitive impairments and neuronal damages by decreasing Pb-induced excess autophagy accumulation.
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Affiliation(s)
- Mengmeng Wang
- Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei, Anhui, PR China; School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Yanzhou Xia
- Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei, Anhui, PR China
| | - Shu Ai
- Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei, Anhui, PR China
| | - Xiaozhen Gu
- Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei, Anhui, PR China; School of Food and Biological Engineering, Hefei University of Technology, Hefei, China.
| | - Hui-Li Wang
- Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei, Anhui, PR China; School of Food and Biological Engineering, Hefei University of Technology, Hefei, China.
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2
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Singh A, Mazahar S, Chapadgaonkar SS, Giri P, Shourie A. Phyto-microbiome to mitigate abiotic stress in crop plants. Front Microbiol 2023; 14:1210890. [PMID: 37601386 PMCID: PMC10433232 DOI: 10.3389/fmicb.2023.1210890] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 07/11/2023] [Indexed: 08/22/2023] Open
Abstract
Plant-associated microbes include taxonomically diverse communities of bacteria, archaebacteria, fungi, and viruses, which establish integral ecological relationships with the host plant and constitute the phyto-microbiome. The phyto-microbiome not only contributes in normal growth and development of plants but also plays a vital role in the maintenance of plant homeostasis during abiotic stress conditions. Owing to its immense metabolic potential, the phyto-microbiome provides the host plant with the capability to mitigate the abiotic stress through various mechanisms like production of antioxidants, plant growth hormones, bioactive compounds, detoxification of harmful chemicals and toxins, sequestration of reactive oxygen species and other free radicals. A deeper understanding of the structure and functions of the phyto-microbiome and the complex mechanisms of phyto-microbiome mediated abiotic stress mitigation would enable its utilization for abiotic stress alleviation of crop plants and development of stress-resistant crops. This review aims at exploring the potential of phyto-microbiome to alleviate drought, heat, salinity and heavy metal stress in crop plants and finding sustainable solutions to enhance the agricultural productivity. The mechanistic insights into the role of phytomicrobiome in imparting abiotic stress tolerance to plants have been summarized, that would be helpful in the development of novel bioinoculants. The high-throughput modern approaches involving candidate gene identification and target gene modification such as genomics, metagenomics, transcriptomics, metabolomics, and phyto-microbiome based genetic engineering have been discussed in wake of the ever-increasing demand of climate resilient crop plants.
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Affiliation(s)
- Anamika Singh
- Department of Botany, Maitreyi College, University of Delhi, New Delhi, India
| | - Samina Mazahar
- Department of Botany, Dyal Singh College, University of Delhi, New Delhi, India
| | - Shilpa Samir Chapadgaonkar
- Department of Biosciences and Technology, Dr. Vishwanath Karad MIT World Peace University, Pune, Maharashtra, India
| | - Priti Giri
- Department of Botany, Maitreyi College, University of Delhi, New Delhi, India
| | - Abhilasha Shourie
- Department of Biotechnology, Faculty of Engineering and Technology, Manav Rachna International Institute of Research and Studies, Faridabad, India
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3
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Wang Q, Shen ZN, Zhang SJ, Sun Y, Zheng FJ, Li YH. Protective effects and mechanism of puerarin targeting PI3K/Akt signal pathway on neurological diseases. Front Pharmacol 2022; 13:1022053. [PMID: 36353499 PMCID: PMC9637631 DOI: 10.3389/fphar.2022.1022053] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 10/10/2022] [Indexed: 07/22/2023] Open
Abstract
Neurological diseases impose a tremendous and increasing burden on global health, and there is currently no curative agent. Puerarin, a natural isoflavone extracted from the dried root of Pueraria montana var. Lobata (Willd.) Sanjappa and Predeep, is an active ingredient with anti-inflammatory, antioxidant, anti-apoptotic, and autophagy-regulating effects. It has great potential in the treatment of neurological and other diseases. Phosphatidylinositol 3-kinases/protein kinase B (PI3K/Akt) signal pathway is a crucial signal transduction mechanism that regulates biological processes such as cell regeneration, apoptosis, and cognitive memory in the central nervous system, and is closely related to the pathogenesis of nervous system diseases. Accumulating evidence suggests that the excellent neuroprotective effect of puerarin may be related to the regulation of the PI3K/Akt signal pathway. Here, we summarized the main biological functions and neuroprotective effects of puerarin via activating PI3K/Akt signal pathway in neurological diseases. This paper illustrates that puerarin, as a neuroprotective agent, can protect nerve cells and delay the progression of neurological diseases through the PI3K/Akt signal pathway.
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Affiliation(s)
| | | | | | | | | | - Yu-Hang Li
- *Correspondence: Feng-Jie Zheng, ; Yu-Hang Li,
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4
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Abdrabouh AE. Inflammatory and proapoptotic effects of inhaling gasoline fumes on the lung and ameliorative effects of fenugreek seeds. Sci Rep 2022; 12:14446. [PMID: 36002599 PMCID: PMC9402566 DOI: 10.1038/s41598-022-18607-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 08/16/2022] [Indexed: 11/17/2022] Open
Abstract
Impacts of inhaling gasoline fumes on the lungs of adult male rats and the alleviating role of fenugreek seeds were evaluated. Twenty-four rats were divided into four groups, unexposed control and fenugreek groups, gasoline exposed groups for 6 h/6 day/week for 10 weeks with and without supplementation of fenugreek seed powder in food (5% w/w). Rats exposed to gasoline fumes showed significant elevation in lung tumor necrosis factor-α, as an inflammatory marker, and the proapoptotic marker Bax with a reduction in the antiapoptotic marker Bcl2. Moreover, remarkable elevations in transforming growth factor-β1, collagen and hydroxyproline were observed as fibrotic markers. Lung oxidative stress markers (hydrogen peroxides, malondialdehyde, and protein carbonyl) increased significantly along with marked decrease in total antioxidant capacity, superoxide dismutase, and catalase levels. Additionally, marked decreases in white and red blood cell counts, hemoglobin content, platelet count, accompanied by elevated red cell distribution width percentage were observed, supporting the inflammatory status. Histopathological changes represented by hematoxylin&eosin, immunohistochemistry staining for Bax&Bcl2, and transmission electron microscopy supported the negative impacts of gasoline fumes compared to the control group. Fenugreek seeds supplementation with gasoline exposure showed pronounced alleviation of lung biochemical and histopathological changes compared to the gasoline-exposed group.
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Affiliation(s)
- Abeer E Abdrabouh
- Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
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5
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Fang Q, Liu J, Chen L, Chen Q, Wang Y, Li Z, Fu W, Liu Y. Taurine supplementation improves hippocampal metabolism in immature rats with intrauterine growth restriction (IUGR) through protecting neurons and reducing gliosis. Metab Brain Dis 2022; 37:2077-2088. [PMID: 35048325 DOI: 10.1007/s11011-021-00896-0] [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: 09/27/2021] [Accepted: 12/10/2021] [Indexed: 02/05/2023]
Abstract
Taurine as an essential amino acid in the brain could play an important role in protecting the fetal brain of intrauterine growth restriction (IUGR). The hippocampus with IUGR showed neural metabolic disorder and structure changed that affected memory and learning ability. This study was aimed to identify the effect of taurine supplementation on the metabolism alterations and cellular composition changes of the hippocampus in IUGR immature rats. Metabolite concentrations were determined by magnetic resonance spectroscopy (MRS) in the hippocampus of juvenile rats with IUGR following taurine supplementation with antenatal or postnatal supply. The composition of neural cells in the hippocampus was observed by immunohistochemical staining (IHC) and western blotting (WB). Antenatal taurine supplementation increased the ratios of N-acetylaspartate (NAA) /creatine (Cr) and glutamate (Glu) /Cr of the hippocampus in the IUGR immature rats, but reduced the ratios of choline (Cho) /Cr and myoinositol (mI) /Cr. At the same time, the protein expression of NeuN in the IUGR rats was increased through intrauterine taurine supplementation, and the GFAP expression was reduced. Especially the effect of antenatal taurine was better than postpartum. Furthermore, there existed a positive correlation between the NAA/Cr ratio and the NeuN protein expression (R = 0.496 p < 0.001 IHC; R = 0.568 p < 0.001 WB), the same results existed in the relationship between the mI/Cr ratio and the GFAP protein expression (R = 0.338 p = 0.019 IHC; R = 0.440 p = 0.002 WB). Prenatal taurine supplementation can better improve hippocampal neuronal metabolism by increasing NAA / Cr ratio related to the number of neurons and reducing Cho / Cr ratio related to the number of glial cells.
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Affiliation(s)
- Qiong Fang
- Department of Pediatrics, Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Jing Liu
- Department of Neonatology and Neonatal Intensive Care Unit, Beijing Chaoyang District Maternal and Child Healthcare Hospital, No. 25 Huaweili, Chaoyang District, Beijing, 100101, China.
- Department of Pediatrics, The Second School of Clinical Medicine, Southern Medical University, No. 1023-1063, Shatai South Road, Baiyun district, Guangzhou, 510515, Guangdong Province, China.
| | - Lang Chen
- Department of Pediatrics, Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Qiaobin Chen
- Department of Pediatrics, Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Yan Wang
- Neonatal Intensive Care Unit of Taian City Central Hospital, Taian, 271000, Shandong, China
| | - Zuanfang Li
- Academy of Integrative Medicine, Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou, 350001, Fujian Province, China
| | - Wei Fu
- Department of Neonatology and Neonatal Intensive Care Unit, Beijing Chaoyang District Maternal and Child Healthcare Hospital, No. 25 Huaweili, Chaoyang District, Beijing, 100101, China
| | - Ying Liu
- Department of Neonatology and Neonatal Intensive Care Unit, Beijing Chaoyang District Maternal and Child Healthcare Hospital, No. 25 Huaweili, Chaoyang District, Beijing, 100101, China
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6
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Allen MC, Moog NK, Buss C, Yen E, Gustafsson HC, Sullivan EL, Graham AM. Co-occurrence of preconception maternal childhood adversity and opioid use during pregnancy: Implications for offspring brain development. Neurotoxicol Teratol 2021; 88:107033. [PMID: 34601061 PMCID: PMC8578395 DOI: 10.1016/j.ntt.2021.107033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 09/20/2021] [Accepted: 09/24/2021] [Indexed: 12/11/2022]
Abstract
Understanding of the effects of in utero opioid exposure on neurodevelopment is a priority given the recent dramatic increase in opioid use among pregnant individuals. However, opioid abuse does not occur in isolation-pregnant individuals abusing opioids often have a significant history of adverse experiences in childhood, among other co-occurring factors. Understanding the specific pathways in which these frequently co-occurring factors may interact and cumulatively influence offspring brain development in utero represents a priority for future research in this area. We highlight maternal history of childhood adversity (CA) as one such co-occurring factor that is more prevalent among individuals using opioids during pregnancy and which is increasingly shown to affect offspring neurodevelopment through mechanisms beginning in utero. Despite the high incidence of CA history in pregnant individuals using opioids, we understand very little about the effects of comorbid prenatal opioid exposure and maternal CA history on fetal brain development. Here, we first provide an overview of current knowledge regarding effects of opioid exposure and maternal CA on offspring neurodevelopment that may occur during gestation. We then outline potential mechanistic pathways through which these factors might have interactive and cumulative influences on offspring neurodevelopment as a foundation for future research in this area.
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Affiliation(s)
- Madeleine C Allen
- Department of Psychiatry, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, United States
| | - Nora K Moog
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Medical Psychology, Luisenstrasse 57, 10117 Berlin, Germany
| | - Claudia Buss
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Medical Psychology, Luisenstrasse 57, 10117 Berlin, Germany; Development, Health and Disease Research Program, University of California, Irvine, 837 Health Sciences Drive, Irvine, California 92697, United States
| | - Elizabeth Yen
- Department of Pediatrics, Tufts Medical Center, Boston, MA 02111, United States
| | - Hanna C Gustafsson
- Department of Psychiatry, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, United States
| | - Elinor L Sullivan
- Department of Psychiatry, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, United States; Division of Neuroscience, Oregon National Primate Research Center, 505 NW 185(th) Ave., Beaverton, OR 97006, United States; Department of Behavioral Neuroscience, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, United States
| | - Alice M Graham
- Department of Psychiatry, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, United States.
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7
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Abstract
Lead (Pb2+) is a non-essential metal with numerous industrial applications that have led to ts ubiquity in the environment. Thus, not only occupational-exposed individuals' health is compromised, but also that of the general population and in particular children. Notably, although the central nervous system is particularly susceptible to Pb2+, other systems are affected as well. The present study focuses on molecular mechanisms that underlie the effects that arise from the presence of Pb2+ in situ in the brain, and the possible toxic effects that follows. As the brain barriers represent the first target of systemic Pb2+, mechanisms of Pb2+ entry into the brain are discussed, followed by a detailed discussion on neurotoxic mechanisms, with special emphasis on theories of ion mimicry, mitochondrial dysfunction, redox imbalance, and neuroinflammation. Most importantly, the confluence and crosstalk between these events is combined into a cogent mechanism of toxicity, by intertwining recent and old evidences from humans, in vitro cell culture and experimental animals. Finally, pharmacological interventions, including chelators, antioxidants substances, anti-inflammatory drugs, or their combination are reviewed as integrated approaches to ameliorate Pb2+ harmful effects in both developing or adult organisms.
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Affiliation(s)
- Miriam B. Virgolini
- IFEC CONICET. IFEC-CONICET. Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Haya de la Torre y Medina Allende, Ciudad Universitaria, 5016, Córdoba, Argentina
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA and IM Sechenov First Moscow State Medical University (Sechenov University), 119146, Moscow, Russia
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8
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Gu X, Xu Y, Xue WZ, Wu Y, Ye Z, Xiao G, Wang HL. Interplay of miR-137 and EZH2 contributes to the genome-wide redistribution of H3K27me3 underlying the Pb-induced memory impairment. Cell Death Dis 2019; 10:671. [PMID: 31511494 PMCID: PMC6739382 DOI: 10.1038/s41419-019-1912-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 08/13/2019] [Accepted: 08/26/2019] [Indexed: 01/20/2023]
Abstract
Compromised learning and memory is a common feature of multiple neurodegenerative disorders. A paradigm spatial memory impairment could be caused by developmental lead (Pb) exposure. Growing evidence implicates epigenetic modifications in the Pb-mediated memory deficits; however, how histone modifications exemplified by H3K27me3 (H3 Lys27 trimethylation) contribute to this pathogenesis remains poorly understood. Here we found that Pb exposure diminished H3K27me3 levels in vivo by suppressing EZH2 (enhancer of zeste homolog 2) expression at an early stage. EZH2 overexpression in Pb-treated rats rescued the H3K27me3 abundance and partially restored the normal spatial memory, as manifested by the rat performance in a Morris water maze test, and structural analysis of hippocampal spine densities. Furthermore, miR-137 and EZH2 constitute mutually inhibitory loop to regulate the H3K27me3 level, and this feedback regulation could be specifically activated by Pb treatment. Considering genes targeted by H3K27me3, ChIP-chip (chromatin immunoprecipitation on chip) studies revealed that Pb could remodel the genome-wide distribution of H3K27me3, represented by pathways like transcriptional regulation, developmental regulation, cell motion, and apoptosis, as well as a novel Wnt9b locus. As a Wnt isoform associated with canonical and noncanonical signaling, Wnt9b was regulated by the opposite modifications of H3K4me3 (H3 Lys4 trimethylation) and H3K27me3 in Pb-exposed neurons. Rescue trials further validated the contribution of Wnt9b to Pb-induced neuronal impairments, wherein canonical or noncanonical Wnt signaling potentially exhibited destructive or protective roles, respectively. In summary, the study reveals an epigenetic-based molecular change underlying Pb-triggered spatial memory deficits, and provides new potential avenues for our understanding of neurodegenerative diseases with environmental etiology.
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Affiliation(s)
- Xiaozhen Gu
- School of Food and Bioengineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Yi Xu
- School of Food and Bioengineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Wei-Zhen Xue
- School of Food and Bioengineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Yulan Wu
- School of Food and Bioengineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China
| | - Zi Ye
- College of Life Science and Bio-engineering, Beijing University of Technology, Beijing, 100022, People's Republic of China
| | - Guiran Xiao
- School of Food and Bioengineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China.
| | - Hui-Li Wang
- School of Food and Bioengineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China.
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Li L, Li H, Qu P, Xiao M, Zhang G, Zhang Q, Cai Y, Jin C, Yang J, Wu S, Lu X. An Antagonism Joint Action of Lead and Di-2-Ethylhexyl Phthalate Explains an Improved Ability of Learning and Memory after Combined Exposure in Weaning Rats. Biol Trace Elem Res 2019; 191:126-134. [PMID: 30523571 DOI: 10.1007/s12011-018-1586-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/19/2018] [Indexed: 12/30/2022]
Abstract
Lead and di-2-ethylhexyl phthalate (DEHP) are widely distributed in the environment, and their neurotoxicity has caused a widespread concern. The complexity of environmental exposure provides the possibility of their combined exposure. The present study aims to describe a joint neurotoxicity and clarify the potential mechanism after combined exposure to lead and DEHP. A 2 × 3 factorial design was used to analyze either single effects or their interaction by a subchronic lead and DEHP exposure model of the male weaning rats. Similar to the previous study, lead or DEHP single exposure showed an increased neurotoxicity. Interestingly, our neurobehavioral test showed the rats in the combined exposure groups had a better ability of learning and memory compared with the single-exposure ones. It seemed to reflect an antagonism joint action in neurotoxicity after combined exposure. The content of dehydroepiandrosterone (DHEA) in serum and the mRNA level of brain-derived neurotrophic factor (Bdnf) in the hippocampus showed a similar trend to the ability of learning and memory. However, there was insufficient evidence to support the joint action on some indexes of oxidative stress such as malondialdehyde (MDA), the ratio of reduced glutathione(GSH) to oxidized glutathione(GSSG), γglutamylcysteine synthetase (γ-GCS), glutathione-s transferase (GST), and nuclear factor E2-related factor 2 (Nrf2) mRNA expression in the hippocampus. In a word, our current study reminded a unique antagonism joint action of neurotoxicity after combined exposure to lead and DEHP, which may contribute to understanding some shallow mechanism of the joint toxicity due to the complexity of environmental pollutant exposure.
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Affiliation(s)
- Liuli Li
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Hao Li
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Peng Qu
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Mingyang Xiao
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Guopei Zhang
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Qianye Zhang
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Yuan Cai
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Cuihong Jin
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Jinghua Yang
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Shengwen Wu
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China
| | - Xiaobo Lu
- Department of Toxicology, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, Liaoning Province, People's Republic of China.
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10
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Jin M, Ji X, Zhang B, Sheng W, Wang R, Liu K. Synergistic effects of Pb and repeated heat pulse on developmental neurotoxicity in zebrafish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 172:460-470. [PMID: 30738228 DOI: 10.1016/j.ecoenv.2019.01.104] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 01/27/2019] [Accepted: 01/29/2019] [Indexed: 06/09/2023]
Abstract
Pollutant discharges to the aquatic environment often contain multiple environmental stressors, affecting aquatic organisms. To mimic the discharges from nuclear and industry facilities, the combined effects of two independent types of stressors, heavy metal Pb and repeated heat pulse were addressed in this study. We investigated the developmental toxicity of combined treatment, especially its toxic effects on zebrafish neurodevelopment. The normal embryos at 4 hpf were exposed to 0.2 mM of Pb dissolved in the bathing medium with different temperatures (30, 32, and 34 °C) and then maintained in an incubator at 28 °C. After performing above treatment once every 24 h for 6 days, we found that combined treatment significantly affected neural development, including loss of dopaminergic (DA) neurons and brain vasculature, disruption of locomotor activity and neurodevelopmental genes expression in a temperature-dependent manner as compared to the Pb alone exposure group, indicating that repeated heat pulse enhances these negative impacts induced by Pb. In contrast, no apparent toxicity was observed in repeated heat pulse alone groups, suggesting that Pb treatment reduces thermal tolerance in zebrafish, which emphasized the importance to evaluate synergistic effects of Pb and repeated heat pulse. Moreover, repeated heat pulse aggravated Pb-induced apoptosis in the zebrafish brain. Further study of the underlying mechanism suggested that Caspase 3 regulated apoptosis was involved in this process. Taken together, our findings shed light on the full understanding of toxic effects of discharges from industrial applications on living organisms and its environmental impact.
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Affiliation(s)
- Meng Jin
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China; Key Laboratory for Drug Screening Technology of Shandong Academy of Sciences, 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China.
| | - Xiuna Ji
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China; Key Laboratory for Drug Screening Technology of Shandong Academy of Sciences, 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China
| | - Baoyue Zhang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China; Key Laboratory for Drug Screening Technology of Shandong Academy of Sciences, 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China
| | - Wenlong Sheng
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China; Key Laboratory for Drug Screening Technology of Shandong Academy of Sciences, 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China
| | - Rongchun Wang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China; Key Laboratory for Drug Screening Technology of Shandong Academy of Sciences, 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China
| | - Kechun Liu
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China; Key Laboratory for Drug Screening Technology of Shandong Academy of Sciences, 28789 East Jingshi Road, Jinan 250103, Shandong Province, PR China.
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11
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Pang S, Li Y, Chen W, Li Y, Yang M, Zhao L, Shen Q, Cheng N, Wang Y, Lin X, Ma J, Wu H, Zhu G. Pb exposure reduces the expression of SNX6 and Homer1 in offspring rats and PC12 cells. Toxicology 2019; 416:23-29. [PMID: 30738087 DOI: 10.1016/j.tox.2019.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 01/24/2019] [Accepted: 02/04/2019] [Indexed: 11/25/2022]
Abstract
Lead (Pb) is a widespread environmental heavy metal toxicant and chronic Pb exposure can have irreversible effects on memory and cognitive function, which is closely related to dendritic spines. Studies have shown that SNX6 and Homer1 can regulate the growth of dendritic spines. We aimed to investigate the effect of Pb exposure on the dendritic spines in hippocampus, the expression of SNX6 and Homer1 in rats and PC12 cells. The animals were randomly divided to three groups: control group, low lead group and high lead group. PC12 cells were divided into 3 groups: 0 μM, 1 μM and 100 μM Pb acetate. The results showed that the Pb levels in blood and hippocampus of all exposure groups were significantly higher than that of the control group. The morphology of dendritic spines in hippocampus after Pb treatment was changed and the density of dendritic spines was reduced. The expression of SNX6 and Homer1 was decreased in Pb exposed groups compared with the control group. Furthermore, up-regulation of SNX6 expression could reverse the down-regulation of Pb exposure on Homer1. These results indicate that Pb exposure can reduce the expression of SNX6 and lead to a decrease in Homer1 expression, which affects the changes in dendritic spines causing learning and memory impairment.
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Affiliation(s)
- Shimin Pang
- Second Clinical Collage, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Yanshu Li
- Jiangxi Supervision and Inspection Center for Medical Devices, Nanchang 330029, PR China
| | - Wei Chen
- Laboratory Animal Science Center, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Yaobin Li
- Department of Anatomy, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Meiyuan Yang
- Department of Anatomy, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Lijuan Zhao
- Second Clinical Collage, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Qiwei Shen
- Second Clinical Collage, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Nuo Cheng
- Queen Marry Collage, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Ying Wang
- Queen Marry Collage, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Xuequn Lin
- Faculty of Nursing, Nanchang Insitude of technology, Nanchang 330006, PR China
| | - Jianmin Ma
- Department of Anatomy, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Honghao Wu
- Department of Anatomy, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Gaochun Zhu
- Department of Anatomy, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China.
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12
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Oxidative stress in the neurodegenerative brain following lifetime exposure to lead in rats: Changes in lifespan profiles. Toxicology 2019; 411:101-109. [DOI: 10.1016/j.tox.2018.11.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 10/26/2018] [Accepted: 11/12/2018] [Indexed: 12/27/2022]
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13
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Paulis MG, Hassan OA, Abbass MF, Mohammad MAAH. Structural and lipid peroxidation effects of lead on rat hippocampus and its attenuation by hydrogen rich water. J Chem Neuroanat 2018; 91:55-62. [PMID: 29694843 DOI: 10.1016/j.jchemneu.2018.04.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 03/18/2018] [Accepted: 04/19/2018] [Indexed: 01/18/2023]
Abstract
Despite the well-known toxicity and the efforts to control its exposure, lead still has a serious health concern, particularly in young ages. Chelation therapy cannot correct the neurocognitive effects of chronic exposure. So, there is a requirement to test different protective agents for lead intoxication. Hydrogen-rich water (HRW) has gained attraction recently as an antioxidant. Four groups of rats received sodium acetate, HRW, lead acetate (LA), or LA plus HRW for 8 weeks. Oxidative stress, histological and immunohistochemistry using p53 antibody were used to investigate the toxic effect of lead and the possible HRW protective effect in rat hippocampus. Results showed that HRW corrected the elevated malondialdehyde levels (MDA) and restore the lead-induced depletion of antioxidant enzymes; glutathione reductase (GR), catalase (CAT) and superoxide dismutase (SOD). HRW does not affect the diminished nitric oxide (NO) level in the LA-treated group. Moreover, HRW reversed the LA-induced histological and immunohistochemical changes. It significantly decreased the percentage of the apoptotic index. We concluded that HRW protects the neurons against lead-induced oxidative stress and has anti-apoptotic effects without a noticeable change in NO level which already was diminished by LA.
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Affiliation(s)
- Melad G Paulis
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Minia University, Egypt.
| | - Osama A Hassan
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Minia University, Egypt
| | - Mohmed F Abbass
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Minia University, Egypt
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14
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Ma L, Liu JY, Dong JX, Xiao Q, Zhao J, Jiang FL. Toxicity of Pb 2+ on rat liver mitochondria induced by oxidative stress and mitochondrial permeability transition. Toxicol Res (Camb) 2017; 6:822-830. [PMID: 30090545 PMCID: PMC6062357 DOI: 10.1039/c7tx00204a] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 09/24/2017] [Indexed: 12/26/2022] Open
Abstract
Pb2+ exposure in humans occurs mainly through air inhalation, food and water uptake which has been shown to be generally associated with numerous body functions such as the central and peripheral nervous systems, the red blood cells, the kidneys and the liver. It has been reported that the liver is the storage site and an important primary target in Pb2+ toxicity, and the hepatotoxicity of Pb2+ could be resulted from the impairment of the liver mitochondria. In this study, several mitochondrial dysfunctions following the addition of Pb2+ (10-160 μM) were investigated. We found that Pb2+ inhibited the enzyme activities of mitochondrial respiratory complexes and complex III was the major source of Pb2+-induced significant reactive oxygen species (ROS) formation. As a consequence, our results showed that Pb2+ induced significant progress in mitochondrial lipid peroxidation, adenosine triphosphate (ATP) consumption and glutathione (GSH) oxidation. On the other hand, Pb2+ induced marked changes in mitochondrial permeability transition (MPT) accompanied by mitochondrial swelling, mitochondrial membrane potential collapse, mitochondrial membrane fluidity decrease and cytochrome c (Cyt c) release. Additionally, several mitochondrial MPT inhibitors and chelators were utilized to determine the possible interaction sites of Pb2+ on mitochondria. In general, our data supported that the Pb2+-induced liver toxicity was a result of the disruptive effect on the mitochondrial respiratory complexes. This disruptive effect caused oxidative stress and MPT, which led to mitochondrial dysfunctions and even cell death signalling via mitochondrial permeability transition pore (MPTP) opening and Cyt c release.
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Affiliation(s)
- Long Ma
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE) , College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China . ; ; Tel: +86-27-68756667
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , School of Chemistry and Pharmaceutical Sciences , Guangxi Normal University , Guilin 541004 , P. R. China
| | - Jun-Yi Liu
- The Bryn Mawr School , Baltimore , MD 21210 , USA
| | - Jia-Xin Dong
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , School of Chemistry and Pharmaceutical Sciences , Guangxi Normal University , Guilin 541004 , P. R. China
| | - Qi Xiao
- College of Chemistry and Material Science , Guangxi Teachers Education University , Nanning 530001 , P. R. China
| | - Jie Zhao
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE) , College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China . ; ; Tel: +86-27-68756667
| | - Feng-Lei Jiang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE) , College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China . ; ; Tel: +86-27-68756667
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15
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Ebrahimzadeh-Bideskan AR, Hami J, Alipour F, Haghir H, Fazel AR, Sadeghi A. Protective effects of ascorbic acid and garlic extract against lead-induced apoptosis in developing rat hippocampus. Metab Brain Dis 2016; 31:1123-32. [PMID: 27311610 DOI: 10.1007/s11011-016-9837-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 05/16/2016] [Indexed: 12/12/2022]
Abstract
Lead exposure has negative effects on developing nervous system and induces apoptosis in newly generated neurons. Natural antioxidants (i.e. Ascorbic acid and Garlic) might protect against lead-induced neuronal cell damage. The aim of the present study was to investigate the protective effects of Ascorbic acid and Garlic administration during pregnancy and lactation on lead-induced apoptosis in rat developing hippocampus. Timed pregnant Wistar rats were administrated with Lead (1500 ppm) via drinking water (Pb group) or lead plus Ascorbic acid (Pb + AA Group, 500 mg/kg, IP), or lead plus Garlic Extract (Pb + G Group, 1 ml garlic juice/100 g BW, via Gavage) from early gestation (GD 0) until postnatal day 50 (PN 50). At the end of experiments, the pups' brains were carefully dissected. To identify neuronal death, the brain sections were stained with TUNEL assay. Mean of blood and brain lead levels increased significantly in Pb group comparing to other studied groups (P < 0.01). There was significant reduction in blood and brain lead level in Pb + AA and Pb + G groups when compared to those of Pb group (P < 0.01). The mean number of TUNEL positive cells in the CA1, CA3, and DG was significantly lower in the groups treated by either Ascorbic acid or Garlic (P < 0.05). Administration of Ascorbic acid and Garlic during pregnancy and lactation protect against lead-induced neuronal cell apoptosis in the hippocampus of rat pups partially via the reduction of Pb concentration in the blood and in the brain.
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Affiliation(s)
| | - Javad Hami
- Department of Anatomical Sciences, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
- Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Fatemeh Alipour
- Department of Anatomy and Cell Biology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Haghir
- Department of Anatomy and Cell Biology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali-Reza Fazel
- Department of Anatomy and Cell Biology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Akram Sadeghi
- Department of Anatomy and Cell Biology, School of Medicine, Isfahan University of Medical Sciences, Hezar jarib St, Isfahan, Iran.
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16
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Maternal lead exposure decreases the levels of brain development and cognition-related proteins with concomitant upsurges of oxidative stress, inflammatory response and apoptosis in the offspring rats. Neurotoxicology 2016; 56:150-158. [DOI: 10.1016/j.neuro.2016.07.013] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 07/03/2016] [Accepted: 07/30/2016] [Indexed: 01/04/2023]
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17
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Soleimani E, Goudarzi I, Abrari K, Lashkarbolouki T. The combined effects of developmental lead and ethanol exposure on hippocampus dependent spatial learning and memory in rats: Role of oxidative stress. Food Chem Toxicol 2016; 96:263-72. [PMID: 27421826 DOI: 10.1016/j.fct.2016.07.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 07/01/2016] [Accepted: 07/11/2016] [Indexed: 01/31/2023]
Abstract
Either developmental lead or ethanol exposure can impair learning and memory via induction of oxidative stress, which results in neuronal damage. we examined the effect of combined exposure with lead and ethanol on spatial learning and memory in offspring and oxidative stress in hippocampus. Rats were exposed to lead (0.2% in drinking water) or ethanol (4 g/kg) either individually or in combination in 5th day gestation through weaning. On postnatal days (PD) 30, rats were trained with six trials per day for 6 consecutive days in the water maze. On day 37, a probe test was done. Also, oxidative stress markers in the hippocampus were also evaluated. Results demonstrated that lead + ethanol co-exposed rats exhibited higher escape latency during training trials and reduced time spent in target quadrant, higher escape location latency and average proximity in probe trial test. There was significant decrease in superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) activities and increase of malondialdehyde (MDA) levels in hippocampus of animals co-exposed to lead and ethanol compared with their individual exposures. We suggest that maternal consumption of ethanol during lead exposure has pronounced detrimental effects on memory, which may be mediated by oxidative stress.
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Affiliation(s)
| | - Iran Goudarzi
- Faculty of Biology, Damghan University, Damghan, Iran.
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18
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Feng C, Gu J, Zhou F, Li J, Zhu G, Guan L, Liu H, Du G, Feng J, Liu D, Zhang S, Fan G. The effect of lead exposure on expression of SIRT1 in the rat hippocampus. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 44:84-92. [PMID: 27131751 DOI: 10.1016/j.etap.2016.04.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 04/12/2016] [Accepted: 04/17/2016] [Indexed: 06/05/2023]
Abstract
Based on how the silent information regulator 2 homolog 1 (SIRT1) regulates the cyclic AMP response element binding protein (CREB), which is the molecular switch of long-term memory that maintains cognitive function, it is postulated that the impact of lead (Pb) on SIRT1 is one of the mechanisms leading to Pb-induced cognitive and learning deficits. Hence, the purpose of this study was to investigate the effect of Pb exposure on the expression of SIRT1, and the reversion effect of resveratrol, which is an activator of SIRT1. We examined the effects of maternal rat ingestion of Pb in drinking water during gestation and lactation on the expression of SIRT1 and CREB in the hippocampus of their offspring at postnatal week 3 (PNW3) and 52 (PNW52), and then reexamined these effects in offspring after intragastric administration of resveratrol for 4 weeks. Pb exposure decreased SIRT1 and CREB phosphorylation in a dose-dependent manner in the rat hippocampus at both PNW3 and 52, and resveratrol reversed those losses. These results indicated that SIRT1 might be a novel target to prevent Pb neurotoxicity.
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Affiliation(s)
- Chang Feng
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Junwang Gu
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Fankun Zhou
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China; State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Jiaoyang Li
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Gaochun Zhu
- Department of Anatomy, School of Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Linfu Guan
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Haizhen Liu
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Guihua Du
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Jiangao Feng
- Department of Medical Experiment Teaching, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Dong Liu
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Shuyun Zhang
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Guangqin Fan
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, BaYi Road 461, Nanchang 330006, PR China; State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China.
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19
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Neal RE, Jagadapillai R, Chen J, Webb C, Stocke K, Greene RM, Pisano MM. Developmental cigarette smoke exposure II: Hippocampus proteome and metabolome profiles in adult offspring. Reprod Toxicol 2016; 65:436-447. [PMID: 27208486 DOI: 10.1016/j.reprotox.2016.05.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 05/05/2016] [Accepted: 05/13/2016] [Indexed: 11/27/2022]
Abstract
Exposure to cigarette smoke during development is linked to neurodevelopmental delays and cognitive impairment including impulsivity, attention deficit disorder, and lower IQ. Utilizing a murine experimental model of "active" inhalation exposure to cigarette smoke spanning the entirety of gestation and through human third trimester equivalent hippocampal development [gestation day 1 (GD1) through postnatal day 21 (PD21)], we examined hippocampus proteome and metabolome alterations present at a time during which developmental cigarette smoke exposure (CSE)-induced behavioral and cognitive impairments are evident in adult animals from this model system. At six month of age, carbohydrate metabolism and lipid content in the hippocampus of adult offspring remained impacted by prior exposure to cigarette smoke during the critical period of hippocampal ontogenesis indicating limited glycolysis. These findings indicate developmental CSE-induced systemic glucose availability may limit both organism growth and developmental trajectory, including the capacity for learning and memory.
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Affiliation(s)
- Rachel E Neal
- Department of Environmental and Occupational Health Sciences, School of Public Health and Information Sciences, University of Louisville, Louisville, KY, USA; Birth Defects Center, University of Louisville, Louisville, KY, USA.
| | - Rekha Jagadapillai
- Department of Molecular, Cellular, and Craniofacial Biology, ULSD, University of Louisville, Louisville, KY, USA
| | - Jing Chen
- Department of Environmental and Occupational Health Sciences, School of Public Health and Information Sciences, University of Louisville, Louisville, KY, USA
| | - Cindy Webb
- Department of Molecular, Cellular, and Craniofacial Biology, ULSD, University of Louisville, Louisville, KY, USA
| | - Kendall Stocke
- Department of Environmental and Occupational Health Sciences, School of Public Health and Information Sciences, University of Louisville, Louisville, KY, USA
| | - Robert M Greene
- Department of Molecular, Cellular, and Craniofacial Biology, ULSD, University of Louisville, Louisville, KY, USA; Birth Defects Center, University of Louisville, Louisville, KY, USA
| | - M Michele Pisano
- Department of Molecular, Cellular, and Craniofacial Biology, ULSD, University of Louisville, Louisville, KY, USA; Birth Defects Center, University of Louisville, Louisville, KY, USA
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20
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Li X, Ye F, Li L, Chang W, Wu X, Chen J. The role of HO-1 in protection against lead-induced neurotoxicity. Neurotoxicology 2015; 52:1-11. [PMID: 26542248 DOI: 10.1016/j.neuro.2015.10.015] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 10/05/2015] [Accepted: 10/28/2015] [Indexed: 12/01/2022]
Abstract
Lead is a pervasive and persistent environmental pollutant that exerts deleterious effects on all living organisms and continues to threaten public health on a global scale. Heme oxygenase-1 (HO-1) is a stress-inducible enzyme that mediates antioxidative and cytoprotective effects to maintain cellular redox homeostasis and protect cells from oxidative stress. This study was designed to explore the role of HO-1 in protection against lead neurotoxicity and the signaling pathways involved. Lead acetate (PbAc) exposure resulted in increased HO-1 expression in primary rat hippocampal neurons and SH-SY5Y cells. PbAc-induced intracellular reactive oxygen species (ROS) also increased, and cell viability decreased in SH-SY5Y cells. We further demonstrated that HO-1 could be induced by PbAc through the P38, ERK1/2, and PI3K/AKT signaling pathways in a ROS-dependent manner and through the JNK pathway in a ROS-independent manner. Further investigation revealed that HO-1 overexpression significantly restrained cell apoptosis and ROS production induced by PbAc in SH-SY5Y cells. Moreover, HO-1 knockdown aggravated PbAc-induced cell apoptosis and ROS production. Our results indicated that HO-1 was a novel protective factor that could efficiently inhibit PbAc-induced oxidative stress and cell death in the nervous system, thereby providing the potential therapeutic strategies for the prevention and treatment of lead-related diseases.
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Affiliation(s)
- Xiaoyi Li
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Fang Ye
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Lili Li
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Wei Chang
- Department of Public Health, Medical College, Wuhan University of Science and Technology, Wuhan, PR China
| | - Xiongwen Wu
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China.
| | - Jun Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China.
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21
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Bolten M. Transgenerational Transmission of Stress Pathology. ZEITSCHRIFT FUR PSYCHOLOGIE-JOURNAL OF PSYCHOLOGY 2015. [DOI: 10.1027/2151-2604/a000219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Abstract. The impact of the environment early in life on long-term outcomes is well known. Stressful experiences during pre- and postnatal development can modulate the genetic programming of specific brain circuits underlying emotional and cognitive aspects of behavioral adaptation to stressful experiences later in life. Furthermore, there is documented evidence for gene-environment interactions in the context of early-life stress. Identical gene variants can be associated with different phenotypes depending on environmental factors. DNA methylation, an enzymatically-catalyzed modification of the DNA, is the mechanism through which phenotypes are regulated. The dynamics and plasticity of epigenetic mechanisms can have short-term, long-term, or transgenerational consequences. In epigenetic research, rodent models have targeted several behavioral and emotional phenotypes. These models have contributed significantly to our understanding of the environmental regulation of the developmental brain in early life. This review will highlight studies with rats and mice on epigenetic processes in fetal programming of stress-related mental disorders.
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Affiliation(s)
- Margarete Bolten
- Child and Adolescent Psychiatric Clinic, University of Basel, Switzerland
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22
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Barkur RR, Bairy LK. Assessment of oxidative stress in hippocampus, cerebellum and frontal cortex in rat pups exposed to lead (Pb) during specific periods of initial brain development. Biol Trace Elem Res 2015; 164:212-8. [PMID: 25575663 DOI: 10.1007/s12011-014-0221-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 12/22/2014] [Indexed: 11/26/2022]
Abstract
Epidemiological studies in children have proved that lead (Pb) exposure causes deficits in neural and cognitive functions. The present study assessed the oxidative stress on postnatal day 30, in the hippocampus, cerebellum and frontal cortex of rat pups exposed to Pb during specific periods of early brain development. Five groups of rat pups were investigated, and 0.2% Pb acetate in drinking was the dosage used. (i) Gestation and lactation (GL) group (n = 9) of rat pups was exposed to Pb during gestation and lactation through their mother, (ii) gestation (G) group (n = 9) of rat pups was exposed to Pb during gestation only, (iii) lactation (L) group (n = 9) of rat pups was exposed to Pb during lactation only, (iv) pre-gestation (PG) group (n = 9) of rat pups was born to mothers who were exposed to Pb for 1 month before conception, and (v) normal control (NC) (n = 9) group of rats pups had no exposure to Pb during gestation and lactation period. From the present study, it is evident that Pb exposure during different periods of early brain development (GL, G, L and PG groups) causes oxidative stress and lactation period (postnatal period) of Pb exposure produces maximum oxidative stress.
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Affiliation(s)
- Rajashekar Rao Barkur
- Department of Biochemistry, Melaka Manipal Medical College, Manipal University, Manipal, Karnataka, India
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23
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Hosseini A, Sharifi AM, Abdollahi M, Najafi R, Baeeri M, Rayegan S, Cheshmehnour J, Hassani S, Bayrami Z, Safa M. Cerium and yttrium oxide nanoparticles against lead-induced oxidative stress and apoptosis in rat hippocampus. Biol Trace Elem Res 2015; 164:80-9. [PMID: 25516117 DOI: 10.1007/s12011-014-0197-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Accepted: 11/27/2014] [Indexed: 01/01/2023]
Abstract
Due to numerous industrial applications, lead has caused widespread pollution in the environment; it seems that the central nervous system (CNS) is the main target for lead in the human body. Oxidative stress and programmed cell death in the CNS have been assumed as two mechanisms related to neurotoxicity of lead. Cerium oxide (CeO2) and yttrium oxide (Y2O3) nanoparticles have recently shown antioxidant effects, particularly when used together, through scavenging the amount of reactive oxygen species (ROS) required for cell apoptosis. We looked into the neuroprotective effects of the combinations of these nanoparticles against acute lead-induced neurotoxicity in rat hippocampus. We used five groups in this study: control, lead, CeO2 nanoparticles + lead, Y2O3 nanoparticles + lead, and CeO2 and Y2O3 nanoparticles + lead. Nanoparticles of CeO2 (1000 mg/kg) and Y2O3 (230 mg/kg) were administered intraperitoneally during 2 days prior to intraperitoneal injection of the lead (25 mg/kg for 3 days). At the end of the treatments, oxidative stress markers, antioxidant enzymes activity, and apoptosis indexes were investigated. The results demonstrated that pretreatments with CeO2 and/or Y2O3 nanoparticles recovered lead-caused oxidative stress markers (ROS, lipid peroxidation, and total thiol molecules) and apoptosis indexes (Bax/Bcl-2 and caspase-3 protein expression). Besides, these nanoparticles reduced the activities of lead-induced superoxide dismutase and catalase as well as the ADP/ATP ratio. Interestingly, the best recovery resulted from the compound of these nanoparticles. Based on these outcomes, it appears that this combination may potentially be beneficial for protection against lead-caused acute toxicity in the brain through improving the oxidative stress-mediated programmed cell death pathway.
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Affiliation(s)
- Asieh Hosseini
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, 1449614535, Iran,
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Arora M, Hare DJ. Tooth lead levels as an estimate of lead body burden in rats following pre- and neonatal exposure. RSC Adv 2015. [DOI: 10.1039/c5ra11241a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Accurate assessment of early life lead exposure requires an accessible and reliable biomarker.
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Affiliation(s)
- Manish Arora
- Senator Frank R. Lautenberg Environmental Health Sciences Laboratory
- Department of Preventive Medicine
- Icahn School of Medicine at Mount Sinai
- New York
- USA
| | - Dominic J. Hare
- Senator Frank R. Lautenberg Environmental Health Sciences Laboratory
- Department of Preventive Medicine
- Icahn School of Medicine at Mount Sinai
- New York
- USA
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25
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Lead Intoxication Synergies of the Ethanol-Induced Toxic Responses in Neuronal Cells--PC12. Mol Neurobiol 2014; 52:1504-1520. [PMID: 25367877 DOI: 10.1007/s12035-014-8928-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 10/07/2014] [Indexed: 01/05/2023]
Abstract
Lead (Pb)-induced neurodegeneration and its link with widespread neurobehavioral changes are well documented. Experimental evidences suggest that ethanol could enhance the absorption of metals in the body, and alcohol consumption may increase the susceptibility to metal intoxication in the brain. However, the underlying mechanism of ethanol action in affecting metal toxicity in brain cells is poorly understood. Thus, an attempt was made to investigate the modulatory effect of ethanol on Pb intoxication in PC12 cells, a rat pheochromocytoma. Cells were co-exposed to biological safe doses of Pb (10 μM) and ethanol (200 mM), and data were compared to the response of cells which received independent exposure to these chemicals at similar doses. Ethanol (200 mM) exposure significantly aggravated the Pb-induced alterations in the end points associated with oxidative stress and apoptosis. The finding confirms the involvement of reactive oxygen species (ROS)-mediated oxidative stress, and impairment of mitochondrial membrane potential, which subsequently facilitate the translocation of triggering proteins between cytoplasm and mitochondria. We further confirmed the apoptotic changes due to induction of mitochondria-mediated caspase cascade. These cellular changes were found to recover significantly, if the cells are exposed to N-acetyl cysteine (NAC), a known antioxidant. Our data suggest that ethanol may potentiate Pb-induced cellular damage in brain cells, but such damaging effects could be recovered by inhibition of ROS generation. These results open up further possibilities for the design of new therapeutics based on antioxidants to prevent neurodegeneration and associated health problems.
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26
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Li C, Pan Z, Xu T, Zhang C, Wu Q, Niu Y. Puerarin induces the upregulation of glutathione levels and nuclear translocation of Nrf2 through PI3K/Akt/GSK-3β signaling events in PC12 cells exposed to lead. Neurotoxicol Teratol 2014; 46:1-9. [PMID: 25195717 DOI: 10.1016/j.ntt.2014.08.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 07/14/2014] [Accepted: 08/29/2014] [Indexed: 01/16/2023]
Abstract
Oxidative stress is thought to be involved in lead-induced toxicity, especially affecting the brain. We reported previously that puerarin possesses antioxidative properties in the nervous system. Therefore, the aim of the present study was to test the hypothesis that puerarin inhibits lead acetate-induced oxidative stress in PC12 cells by interrupting phosphatidylinositol-3 kinase (PI3K)/Akt signaling through increasing glutathione (GSH) synthesis. Our results showed that puerarin attenuates oxidative stress in a concentration-dependent manner in PC12 cells exposed to lead acetate demonstrated by scavenging reactive oxygen species (ROS) and reducing lipid peroxidation (LPO). Treatment with puerarin significantly up-regulates glutamate cysteine ligase catalytic subunit (GCLc) expression both at its mRNA and protein levels, but not glutamate cysteine ligase modifier (GCLm) subunit, accompanying the elevation of cellular glutathione level. The increased nuclear accumulation of nuclear factor erythroid 2-related factor 2 (Nrf2) was not because of increased transcription of Nrf2 as Nrf2 transcript levels did not change after puerarin treatment. The effects of puerarin could be partially blocked by pharmacologic inhibition of PI3K and the glycogen synthase kinase 3β (GSK-3β) pathways with LY294002 and LiCl, respectively. On the other hand, puerarin treatment promoted Akt and GSK-3β phosphorylation in PC12 cells exposed to lead acetate. Moreover, puerarin failed to modulate the phosphorylation of extracellular signal-regulated kinases 1 and 2 (ERK1/2), p-c-Jun N-terminal kinases (JNK), and p-p38 mitogen-activated protein kinase (MAPK) demonstrating some specificity for its action on the PI3K/GSK-3β pathway. These findings suggest that puerarin as a phytoestrogen might be an attractive agent for prevention and treatment of chronic diseases related to lead neurotoxicity.
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Affiliation(s)
- Chengchong Li
- The Institute of Medicine, Qiqihar Medical University, Qiqihar 161006, China
| | - Zhi Pan
- Center for New Medicine Research, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Tianjiao Xu
- The Institute of Medicine, Qiqihar Medical University, Qiqihar 161006, China
| | - Chun Zhang
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Yinchuan 750004, China
| | - Qi Wu
- Medical Technology Department, Qiqihar Medical University, Qiqihar 161006, China
| | - Yingcai Niu
- The Institute of Medicine, Qiqihar Medical University, Qiqihar 161006, China.
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27
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Yang X, Wang B, Zeng H, Cai C, Hu Q, Cai S, Xu L, Meng X, Zou F. Role of the mitochondrial Ca²⁺ uniporter in Pb²⁺-induced oxidative stress in human neuroblastoma cells. Brain Res 2014; 1575:12-21. [PMID: 24881885 DOI: 10.1016/j.brainres.2014.05.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 05/16/2014] [Accepted: 05/22/2014] [Indexed: 01/18/2023]
Abstract
Lead (Pb(2+)) has been shown to induce cellular oxidative stress, which is linked to changes in intracellular calcium (Ca(2+)) concentration. The mitochondrial Ca(2+) uniporter (MCU) participates in the maintenance of Ca(2+) homeostasis in neurons, but its role in Pb(2+)-induced oxidative stress is unclear. To address this question, oxidative stress was induced in human neuroblastoma SH-SY5Y cells and in newborn rats by Pb(2+) treatment. The results showed that the production of reactive oxygen species is increased in cells upon treatment with Pb(2+) in a dose-dependent manner, while glutathione and MCU expression were reduced. Moreover, neuronal nitric oxide synthase protein expression was elevated in rats exposed to Pb(2+) during gestation, while MCU expression was decreased. Application of the MCU activator spermine or MCU overexpression reversed Pb(2+)-induced oxidative stress and inhibition of mitochondrial Ca(2+) uptake, while the MCU inhibitor Ru360 and MCU knockdown potentiated the effects of Pb(2+). These results indicate that the MCU mediates the Pb(2+)-induced oxidative stress response in neurons through the regulation of mitochondrial Ca(2+) influx.
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Affiliation(s)
- Xinyi Yang
- Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Bin Wang
- Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Hongqiang Zeng
- Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Chunqing Cai
- Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Qiansheng Hu
- Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China
| | - Shaoxi Cai
- Department of Respiratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Lei Xu
- Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Xiaojing Meng
- Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, China.
| | - Fei Zou
- Department of Occupational Health and Occupational Medicine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, China.
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28
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Sánchez-Martín FJ, Fan Y, Lindquist DM, Xia Y, Puga A. Lead induces similar gene expression changes in brains of gestationally exposed adult mice and in neurons differentiated from mouse embryonic stem cells. PLoS One 2013; 8:e80558. [PMID: 24260418 PMCID: PMC3834098 DOI: 10.1371/journal.pone.0080558] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Accepted: 10/15/2013] [Indexed: 12/22/2022] Open
Abstract
Exposure to environmental toxicants during embryonic life causes changes in the expression of developmental genes that may last for a lifetime and adversely affect the exposed individual. Developmental exposure to lead (Pb), an ubiquitous environmental contaminant, causes deficits in cognitive functions and IQ, behavioral effects, and attention deficit hyperactivity disorder (ADHD). Long-term effects observed after early life exposure to Pb include reduction of gray matter, alteration of myelin structure, and increment of criminal behavior in adults. Despite growing research interest, the molecular mechanisms responsible for the effects of lead in the central nervous system are still largely unknown. To study the molecular changes due to Pb exposure during neurodevelopment, we exposed mice to Pb in utero and examined the expression of neural markers, neurotrophins, transcription factors and glutamate-related genes in hippocampus, cortex, and thalamus at postnatal day 60. We found that hippocampus was the area where gene expression changes due to Pb exposure were more pronounced. To recapitulate gestational Pb exposure in vitro, we differentiated mouse embryonic stem cells (ESC) into neurons and treated ESC-derived neurons with Pb for the length of the differentiation process. These neurons expressed the characteristic neuronal markers Tubb3, Syp, Gap43, Hud, Ngn1, Vglut1 (a marker of glutamatergic neurons), and all the glutamate receptor subunits, but not the glial marker Gafp. Importantly, several of the changes observed in Pb-exposed mouse brains in vivo were also observed in Pb-treated ESC-derived neurons, including those affecting expression of Ngn1, Bdnf exon IV, Grin1, Grin2D, Grik5, Gria4, and Grm6. We conclude that our ESC-derived model of toxicant exposure during neural differentiation promises to be a useful model to analyze mechanisms of neurotoxicity induced by Pb and other environmental agents.
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Affiliation(s)
- Francisco Javier Sánchez-Martín
- Department of Environmental Health and Center for Environmental Genetics, University of Cincinnati, College of Medicine, Cincinnati, Ohio, United States of America
| | - Yunxia Fan
- Department of Environmental Health and Center for Environmental Genetics, University of Cincinnati, College of Medicine, Cincinnati, Ohio, United States of America
| | - Diana M. Lindquist
- Cincinnati Children's Hospital Medical Center, Department of Radiology, Cincinnati, Ohio, United States of America
| | - Ying Xia
- Department of Environmental Health and Center for Environmental Genetics, University of Cincinnati, College of Medicine, Cincinnati, Ohio, United States of America
| | - Alvaro Puga
- Department of Environmental Health and Center for Environmental Genetics, University of Cincinnati, College of Medicine, Cincinnati, Ohio, United States of America
- * E-mail:
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29
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Gutowska I, Baranowska-Bosiacka I, Siwiec E, Szczuko M, Kolasa A, Kondarewicz A, Rybicka M, Dunaj-Stańczyk M, Wiernicki I, Chlubek D, Stachowska E. Lead enhances fluoride influence on apoptotic processes in the HepG2 liver cell line. Toxicol Ind Health 2013; 32:517-25. [PMID: 24193047 DOI: 10.1177/0748233713502843] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Chronic long-term exposure to high levels of fluoride leads to fluorosis, manifested by skeletal fluorosis and damage to internal organs, including kidneys, liver, parathyroid glands, and brain. Excess fluoride can also cause DNA damage, trigger apoptosis, and change cell cycle. The effect of fluoride may be exacerbated by lead (Pb), a potent inhibitor of many enzymes and a factor causing apoptosis, still present in the environment in excessive amounts. Therefore, in this study, we investigated the effects of sodium fluoride (NaF) and/or lead acetate (PbAc) on development of apoptosis, cell vitality, and proliferation in the liver cell line HepG2. We examined hepatocytes from the liver cell line HepG2, incubated for 48 h with NaF, PbAc, and their mixture (NaF + PbAc), and used for measuring apoptosis, index of proliferation, and vitality of cells. Incubation of the hepatocytes with NaF or PbAc increased apoptosis, more when fluoride and Pb were used simultaneously. Vitality of the cells depended on the compound used and its concentration. Proliferation slightly increased and then decreased in a high fluoride environment; it decreased significantly after addition of Pb in a dose-dependent manner. When used together, fluoride inhibited the decreasing effect of Pb on cell proliferation.
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Affiliation(s)
- Izabela Gutowska
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland
| | | | - Ewa Siwiec
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland
| | - Małgorzata Szczuko
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland
| | - Agnieszka Kolasa
- Department of Histology and Embryology, Pomeranian Medical University, Szczecin, Poland
| | - Anna Kondarewicz
- Department of Histology and Embryology, Pomeranian Medical University, Szczecin, Poland
| | - Marta Rybicka
- Department of Biochemistry, Pomeranian Medical University, Szczecin, Poland
| | | | - Ireneusz Wiernicki
- Department of Vascular Surgery and Angiology, Pomeranian Medical University, Szczecin, Poland
| | - Dariusz Chlubek
- Department of Biochemistry, Pomeranian Medical University, Szczecin, Poland
| | - Ewa Stachowska
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland
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30
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Reversal effect of monoisoamyl dimercaptosuccinic acid (MiADMSA) for arsenic and lead induced perturbations in apoptosis and antioxidant enzymes in developing rat brain. Int J Dev Neurosci 2013; 31:586-97. [DOI: 10.1016/j.ijdevneu.2013.07.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 07/03/2013] [Accepted: 07/18/2013] [Indexed: 11/21/2022] Open
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