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Wei Y, Zhou G, Lv G, Wei W, Shera L, Lin H, Chen J, Kang D. PCB169 exposure aggravated the development of non-alcoholic fatty liver in high-fat diet-induced male C57BL/6 mice. Front Nutr 2024; 11:1350146. [PMID: 38779445 PMCID: PMC11110572 DOI: 10.3389/fnut.2024.1350146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 04/22/2024] [Indexed: 05/25/2024] Open
Abstract
Polychlorinated biphenyls (PCBs) are lipophilic environmental toxicants. Epidemiological studies have established a link between PCBs and both metabolic syndrome and nonalcoholic fatty liver disease (NAFLD). Multiple studies have reported that exposure to both PCB156 and PCB126 among the 12 dioxin-like PCBs leads to the development of NAFLD. However, studies to elucidate whether PCB169 induces the development of NAFLD by constructing in vivo models have not been reported. Therefore, we evaluated the effects of exposure to PCB169 (5 mg/kg-bw) on hepatic lipid metabolism in C57BL/6 mice from control diet and high-fat diet cohorts. The results showed that PCB169 exposure reduced body weight and intraperitoneal fat mass in mice on the control diet, but the liver lipid levels were significantly increased, exacerbating NAFLD in mice on a high-fat diet. Through transcriptomics studies, it was found that PCB169 exposure induced significant up-regulation of Pparγ, Fasn, and Aacs genes involved in hepatic lipogenesis, as well as remarkable up-regulation of Hmgcr, Lss, and Sqle genes involved in cholesterol synthesis. Additionally, there was notable down-regulation of Pparα and Cpt1 genes involved in lipid β-oxidation, leading to abnormal lipid accumulation in the liver. In addition, we found that PCB169 exposure significantly activated the Arachidonic acid metabolism, PPAR signaling pathway, Metabolism of xenobiotics by cytochrome P450, and Retinol metabolism pathways, and so on. Our study suggests that PCB169 can modify gene expression related to lipid metabolism, augument lipid accumulation in the liver, and further contribute to the development of NAFLD, thereby revealing the detrimental effects associated with PCB exposure on animal growth and metabolism.
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Affiliation(s)
| | | | | | | | | | | | - Jinjun Chen
- Department of Veterinary Medicine, College of Coastal Agriculture, Guangdong Ocean University, Zhanjiang, Guangdong, China
| | - Danju Kang
- Department of Veterinary Medicine, College of Coastal Agriculture, Guangdong Ocean University, Zhanjiang, Guangdong, China
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2
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Xu Y, Li A, Xue S, Ding S, Zhang Q. Chiral separation by capillary electrokinetic chromatography with hydrophobic deep eutectic solvents as pseudo-stationary phases. Talanta 2023; 260:124556. [PMID: 37121143 DOI: 10.1016/j.talanta.2023.124556] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 04/07/2023] [Accepted: 04/12/2023] [Indexed: 05/02/2023]
Abstract
This study demonstrated for the first time that hydrophobic deep eutectic solvents (HDESs) can be used in capillary electrophoresis (CE) for chiral separations. We found that the an HDES methyltrioctylammonium chloride:octanoic acid (N8881Cl:OctA) can exist in the form of nano-sized microdroplets in CE background electrolyte solutions, and show hydrophobic effects as a new type of pseudo-stationary phase (PSP) during CE separation. When used in combination with various cyclodextrin (CD)-type chiral selectors, the presence of N8881Cl:OctA significantly improved the enantioresolutions of several model drugs. Moreover, the migration time of the enantiomers can also be reduced when an anionic CD (e.g., carboxymethyl-β-cyclodextrin (CM-β-CD)) was used. Critical factors influencing the chiral separations were systematically investigated including the HDES concentration, hydrogen-bond acceptor (HBA)/hydrogen-bond donor (HBD) ratio, CD concentration, buffer pH, and applied voltage, etc. An insight into chiral recognition mechanism with HDES is provided for reference. A comparison of the chiral CE performance of HDESs with traditional surfactants was also performed to demonstrate their superiority as a new type of PSP.
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Affiliation(s)
- Yu Xu
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, PR China
| | - Ang Li
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, PR China
| | - Song Xue
- Affiliated Hospital of Jiangsu University, Zhenjiang, 212001, PR China
| | - Sihui Ding
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, PR China
| | - Qi Zhang
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, PR China.
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3
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Wei L, Fu J, He L, Wang H, Ruan J, Li F, Wu H. Microcystin-LR-induced autophagy regulates oxidative stress, inflammation, and apoptosis in grass carp ovary cells in vitro. Toxicol In Vitro 2023; 87:105520. [PMID: 36410616 DOI: 10.1016/j.tiv.2022.105520] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/10/2022] [Accepted: 11/15/2022] [Indexed: 11/23/2022]
Abstract
MC-LR is one of the cyanotoxins produced by fresh water cyanobacteria. Previous studies showed that autophagy played an important role in MC-LR-induced reproduction toxicity. However, information on the toxicological mechanism is limited. In this study, MC-LR could induce autophagy and apoptosis in GCO cells in vitro. In GCO cells that had been exposed to MC-LR, the inhibitor of 3-MA effectively decreased cell viability and damaged cell ultrastructure. Oxidative stress was significantly increased in the 3-MA + MC-LR group, accompanied by significantly increased MDA content and decreased CAT activity and GST, SOD1, GPx, and GR expression levels (P < 0.05). Inflammation was more serious in the 3-MA + MC-LR group than that of MC-LR group, which was evidenced by increasing expression levels of TNFα, IL11, MyD88, TNFR1, TRAF2, JNK, CCL4, and CCL20 (P < 0.05). Interestingly, the significant decrease of Caspase-9, Caspase-7, and Bax expression and significant increase of Bcl-2 and Bcl-2/Bax ratio in 3-MA + MC-LR group compared to MC-LR group, suggesting that extent of apoptosis were reduced. Taken together, these results indicated that MC-LR induced autophagy and apoptosis in GCO cells, however, the inhibition of autophagy decreased the extent of apoptosis, induced more serious oxidative stress and inflammation, which eventually induced cell death. Our findings provided some information for exploring the toxicity of MC-LR, however, the role of autophagy require further study in vivo.
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Affiliation(s)
- Lili Wei
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, PR China.
| | - Jianping Fu
- College of life sciences, Jiangxi Normal university, Nanchang, Jiangxi Province 330022, PR China
| | - Li He
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, PR China
| | - Hui Wang
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, PR China
| | - Jiming Ruan
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, PR China
| | - Fugui Li
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, PR China
| | - Huadong Wu
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, PR China.
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4
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Zhang J, Zhang L, He M, Wang Y, Zhang C, Lin D. Bioresponses of earthworm-microbiota symbionts to polychlorinated biphenyls in the presence of nano zero valent iron in soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:159226. [PMID: 36202358 DOI: 10.1016/j.scitotenv.2022.159226] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/27/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
Both earthworms and nano zero-valent iron (nZVI) have been recently regarded as important approaches for in-situ remediation of polychlorinated biphenyls (PCBs) in soil. However, the combined action of earthworms and nZVI toward PCBs, and the biological responses of earthworm-microbiota symbionts to nZVI-PCBs co-exposure in soil remediation systems remain unclear. In this study, a 28-d exposure with different levels of polychlorinated biphenyls (PCBs) and nZVI was applied to earthworm Eisenia fetida in an agricultural soil. Both physiological responses of earthworms and their surrounding microbiota in gut and soil were examined. Kinetic modelling parameters showed a doubled PCB accumulation in earthworms with the presence of nZVI. Meanwhile, nZVI-PCBs coexposure synergistically stimulated the activities of superoxide dismutase (SOD) and catalase (CAT), along with the elevated levels of reactive oxygen species (ROS), malondialdehyde (MDA) and glutathione (GSH) in earthworms. Based on integrated metabolomic and 16S rRNA analysis, it was found that earthworms provided certain metabolites, e.g., S-(2-hydroxyethyl)glutathione, 16-hydroxypalmitic acid, and formamide, beneficial to PCB-degrading microbiota (Novosphingobium and Achromobacter) in the intestine. Our findings of nZVI-enhanced PCB bioaccumulation and the defense mechanism afforded by the earthworm-microbiota symbionts toward PCB-nZVI exposure show the promise of combining earthworms with nZVI for the remediation of PCBs-contaminated soil.
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Affiliation(s)
- Jianying Zhang
- College of Environmental and Resource Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China; National Demonstration Center for Experimental Environment and Resources Education, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China.
| | - Lei Zhang
- College of Environmental and Resource Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China; Institute of Environmental Health, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Mengyang He
- College of Environmental and Resource Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China; Institute of Environmental Health, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yifan Wang
- College of Environmental and Resource Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China; Institute of Environmental Health, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Chunlong Zhang
- Department of Environmental Sciences, University of Houston-Clear Lake, Houston, TX 77058, United States
| | - Daohui Lin
- College of Environmental and Resource Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
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Liu Y, Guo J, Liu W, Yang F, Deng Y, Meng Y, Cheng B, Fu J, Zhang J, Liao X, Wei L, Lu H. Effects of haloxyfop-p-methyl on the developmental toxicity, neurotoxicity, and immunotoxicity in zebrafish. FISH & SHELLFISH IMMUNOLOGY 2023; 132:108466. [PMID: 36462742 DOI: 10.1016/j.fsi.2022.108466] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 11/23/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Pesticides are extensively used in agricultural production, and their residues in soil, water, and agricultural products have become a threat to aquatic ecosystem. In this study, the toxicity of haloxyfop-p-methyl, an aryloxyphenoxypropionate herbicide was studied using the model animal zebrafish. The development of zebrafish larvae was affected by haloxyfop-p-methyl including spinal deformities, decreased body length, slow heart rate, and large yolk sac area. Behavior analysis revealed that behavior activity of larvae was weakened significantly including shortened displacement distance, reduced swimming speed, increased angular speed winding degrees, in accordance with higher AChE activity. Besides, exposure to haloxyfop-p-methyl could induce oxidative stress companied by the increased intents of ROS, MDA and increased activities of CAT and SOD. In immunotoxicity, haloxyfop-p-methyl not only reduced the innate immune cells such as neutrophils and macrophages, but also affected T cells mature in thymus. Furthermore, haloxyfop-p-methyl could induce neutrophils apoptosis, accompanied with the upregulation of the expression of proapoptotic protein such as Bax and P53 and the downregulation of the expression of antiapoptotic protein Bcl-2. In addition, haloxyfop-p-methyl could induce the expression of Jak, STAT and proinflammatory cytokine genes (IFN-γ, TNF-α, and IL-8). These results indicate that haloxyfop-p-methyl induces developmental toxicity, neurotoxicity, and immunotoxicity in zebrafish, providing a perspective on the toxicological mechanism of haloxyfop-p-methyl in teleosts.
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Affiliation(s)
- Yi Liu
- College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Jing Guo
- College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Jian, Jiangxi, China
| | - Wenjin Liu
- College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Fengjie Yang
- College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Jian, Jiangxi, China
| | - Yunyun Deng
- College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Jian, Jiangxi, China
| | - Yunlong Meng
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Jian, Jiangxi, China
| | - Bo Cheng
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Jian, Jiangxi, China
| | - Jianping Fu
- College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - June Zhang
- College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Xinjun Liao
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Jian, Jiangxi, China
| | - Lili Wei
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi, China.
| | - Huiqiang Lu
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Jian, Jiangxi, China.
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6
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Peng L, Liu J, Song E, Song Y. Polychlorinated biphenyl quinone induces immunotoxicity via lymphocytes apoptosis and Th1-Th2 cell imbalance in C57BL/6 mice. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 824:153870. [PMID: 35176371 DOI: 10.1016/j.scitotenv.2022.153870] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/08/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Polychlorinated biphenyls (PCBs) are a class of persistent organic pollutants distributed worldwide. Existing researches indicated that the immune system is one of the most sensitive indicators of adverse health effects caused by PCBs. We for the first time evaluated the immunotoxic effect of PCB29-pQ, an active quinone-type PCB metabolite. After PCB29-pQ exposure, the body weight of the mice was reduced, but increased the organ index of the spleen and lungs. The morphology and structure of the mouse spleen and lungs were changed, and partial types of lymphocyte subsets in the spleen were significantly reduced. The activation of caspase-3, the significant up-regulation of Bax and the decrease of Bcl-2 indicated occurrence of apoptosis. In addition, mRNA results showed that PCB29-pQ caused the imbalance of Th1/Th2 cytokines and promoted the Th1-type immune response. Taken together, the above results demonstrated that treatment with PCB29-pQ induced spleen immune dysfunction targeting the apoptosis pathway and Th1/Th2 cytokines imbalance in mice. Since the immune system plays a fundamental role in maintaining homeostasis and is strongly involved in the development of diseases, this study provides a new insight into the immunotoxicity mechanism of PCBs.
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Affiliation(s)
- Lu Peng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Jing Liu
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Erqun Song
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Yang Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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7
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Peng L, Zhu X, Qin Z, Liu J, Song E, Song Y. Polychlorinated Biphenyl Quinone Metabolites Cause Neutrophil Extracellular Traps in Mouse Bone Marrow Neutrophils. Chem Res Toxicol 2022; 35:597-605. [PMID: 35168318 DOI: 10.1021/acs.chemrestox.1c00375] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Polychlorinated biphenyls (PCBs) are a group of persistent organic environmental pollutants with various toxic effects. Our previous research found that a highly reactive quinone metabolite of PCBs, namely, PCB29-pQ, causes excessive reactive oxygen species (ROS) production and different toxic actions. Neutrophil extracellular traps (NETs), the product of NETosis, are one of the newly discovered programmed cell deaths. Recent studies have suggested the association of NET formation with excess ROS. The objective of this study was to investigate the influence of PCB29-pQ exposure on NETs and its possible molecular mechanisms. Using scanning electron microscopy, immunofluorescence microscopy, and the quantitative analysis of extracellular DNA, we found that PCB29-pQ exposure induces the formation of NETs in mouse bone marrow. Mechanistically, our results suggested that PCB29-pQ induces histone citrullination and chromatin decondensation, which are necessary processes for NET formation. Moreover, PCB29-pQ exposure increases ROS and autophagy levels, while ROS and autophagy inhibitors significantly reverse NET formation. These results indicated that PCB29-pQ-induced NET formation was mediated by the intracellular ROS level and autophagy signaling. In general, our research uncovered a toxicity mechanism of PCB29-pQ, which suggested the necessity of evaluating its immunotoxicity during the risk assessment of PCB exposure.
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Affiliation(s)
- Lu Peng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Rd., Haidian District, Beijing 100085, China.,Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, 2 Tiansheng Rd., Beibei District, Chongqing 400715, China
| | - Xiangyu Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Rd., Haidian District, Beijing 100085, China.,Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, 2 Tiansheng Rd., Beibei District, Chongqing 400715, China
| | - Zongming Qin
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Food Sciences, Southwest University, 2 Tiansheng Rd, Beibei District, Chongqing 400715, China
| | - Jing Liu
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Erqun Song
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, 2 Tiansheng Rd., Beibei District, Chongqing 400715, China
| | - Yang Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Rd., Haidian District, Beijing 100085, China.,Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, 2 Tiansheng Rd., Beibei District, Chongqing 400715, China
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Preparation, Structure Characterization of Carboxymethylated Schisandra Polysaccharides and Their Intervention in Immunotoxicity to Polychlorinated Biphenyls. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Guo J, Pu Y, Zhong L, Wang K, Duan X, Chen D. Lead impaired immune function and tissue integrity in yellow catfish (Peltobargus fulvidraco) by mediating oxidative stress, inflammatory response and apoptosis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 226:112857. [PMID: 34624531 DOI: 10.1016/j.ecoenv.2021.112857] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/11/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Lead (Pb) widely exists in the water environment and has severe toxic effects on aquatic organisms. The yellow catfish (Pelteobagrus fulvidraco) is one of the most important commercial species in China, and moreover, its natural populations are declining with the degradation of environmental water quality. However, little is known about the toxic effects of Pb on its immune organs. This study was performed to determine waterborne Pb exposure on bioaccumulation, histomorphology, antioxidant status, apoptotic and immune response in the head kidney and spleen of yellow catfish. Experimental fish were randomly allocated into twelve tanks (3 tanks per group), and the Pb concentrations of the four groups were 0, 5, 50, and 500 μg/L, respectively. The results reflected that the Pb bioaccumulation of the head kidney and spleen increased with increasing Pb exposure dose and time. Severe histological alterations in the head kidney and spleen were observed at concentration 500 ug/L. With increasing Pb exposure concentrations, the plasma activity of superoxide dismutase (SOD) and catalase (CAT) significantly increased after exposure 7 days and 14 days, and the levels significantly decreased after exposure 28 days. The change trend of glutathione (GSH) levels was opposite to that of SOD and CAT at corresponding exposure time. The plasma malondialdehyde (MDA) levels together with the activities of plasma alkaline phosphatase (AKP) and acid phosphatase (ACP) increased significantly with the increasing Pb concentrations. In contrast, the levels of lysozyme (LYZ), complement 3 (C3) and immunoglobulin M (IgM) decreased significantly with increasing Pb concentrations. Moreover, Pb exposure induced transcriptional upregulation of heat shock protein 70 (hsp70), metallothionein (mt), sod, cat, interleukin-10 (il-10), transforming growth factor-β (tgf-β), and tumor necrosis factor-α (tnf-α), bcl-2-associated X protein (bax), and cysteinyl aspartate specific proteinase -9 (caspase-9), genes in the head kidney and spleen tissues, while downregulating the levels of the lyz, c3, igm and B-cell lymphoma-2 (bcl-2) genes. Our data provide evidence that Pb impaired immune function and tissue integrity in yellow catfish through oxidative stress, inflammatory and apoptosis, and the results can serve as reference data to better protect water environments from Pb eco-toxicants.
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Affiliation(s)
- Jie Guo
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Yan Pu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Liqiao Zhong
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
| | - Ke Wang
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
| | - Xinbin Duan
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China
| | - Daqing Chen
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China; Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China.
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Queiroz LAD, Assis JB, Guimarães JPT, Sousa ESA, Milhomem AC, Sunahara KKS, Sá-Nunes A, Martins JO. Endangered Lymphocytes: The Effects of Alloxan and Streptozotocin on Immune Cells in Type 1 Induced Diabetes. Mediators Inflamm 2021; 2021:9940009. [PMID: 34712101 PMCID: PMC8548114 DOI: 10.1155/2021/9940009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 09/06/2021] [Accepted: 09/16/2021] [Indexed: 12/31/2022] Open
Abstract
Alloxan (ALX) and streptozotocin (STZ) are extensively used to induce type 1 diabetes (T1D) in animal models. This study is aimed at evaluating the differences in immune parameters caused by ALX and STZ. T1D was induced either with ALX or with STZ, and the animals were followed for up to 180 days. Both ALX and STZ induced a decrease in the total number of circulating leukocytes and lymphocytes, with an increase in granulocytes when compared to control mice (CT). STZ-treated mice also exhibited an increase in neutrophils and a reduction in the lymphocyte percentage in the bone marrow. In addition, while the STZ-treated group showed a decrease in total CD3+, CD4-CD8+, and CD4+CD8+ T lymphocytes in the thymus and CD19+ B lymphocytes in the pancreas and spleen, the ALX group showed an increase in CD4-CD8+ and CD19+ only in the thymus. Basal levels of splenic interleukin- (IL-) 1β and pancreatic IL-6 in the STZ group were decreased. Both diabetic groups showed atrophy of the thymic medulla and degeneration of pancreatic islets of Langerhans composed of inflammatory infiltration and hyperemia with vasodilation. ALX-treated mice showed a decrease in reticuloendothelial cells, enhanced lymphocyte/thymocyte cell death, and increased number of Hassall's corpuscles. Reduced in vitro activation of splenic lymphocytes was found in the STZ-treated group. Furthermore, mice immunized with ovalbumin (OVA) showed a more intense antigen-specific paw edema response in the STZ-treated group, while production of anti-OVA IgG1 antibodies was similar in both groups. Thereby, important changes in immune cell parameters in vivo and in vitro were found at an early stage of T1D in the STZ-treated group, whereas alterations in the ALX-treated group were mostly found in the chronic phase of T1D, including increased mortality rates. These findings suggest that the effects of ALX and STZ influenced, at different times, lymphoid organs and their cell populations.
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Affiliation(s)
- Luiz A. D. Queiroz
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, SP, Brazil
| | - Josiane B. Assis
- Laboratory of Experimental Immunology, Institute of Biomedical Sciences, Department of Immunology, University of São Paulo, São Paulo, SP, Brazil
| | - João P. T. Guimarães
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, SP, Brazil
| | - Emanuella S. A. Sousa
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, SP, Brazil
| | - Anália C. Milhomem
- Institute of Tropical Pathology and Public Health, Department of Microbiology, Immunology, Parasitology and Pathology, Federal University of Goiás, Goiânia, GO, Brazil
| | - Karen K. S. Sunahara
- Experimental Physiopathology, Department of Sciences/Experimental Physiopathology, Medical School, University of São Paulo, São Paulo, SP, Brazil
| | - Anderson Sá-Nunes
- Laboratory of Experimental Immunology, Institute of Biomedical Sciences, Department of Immunology, University of São Paulo, São Paulo, SP, Brazil
| | - Joilson O. Martins
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, SP, Brazil
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Segner H, Bailey C, Tafalla C, Bo J. Immunotoxicity of Xenobiotics in Fish: A Role for the Aryl Hydrocarbon Receptor (AhR)? Int J Mol Sci 2021; 22:ijms22179460. [PMID: 34502366 PMCID: PMC8430475 DOI: 10.3390/ijms22179460] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 02/07/2023] Open
Abstract
The impact of anthropogenic contaminants on the immune system of fishes is an issue of growing concern. An important xenobiotic receptor that mediates effects of chemicals, such as halogenated aromatic hydrocarbons (HAHs) and polyaromatic hydrocarbons (PAHs), is the aryl hydrocarbon receptor (AhR). Fish toxicological research has focused on the role of this receptor in xenobiotic biotransformation as well as in causing developmental, cardiac, and reproductive toxicity. However, biomedical research has unraveled an important physiological role of the AhR in the immune system, what suggests that this receptor could be involved in immunotoxic effects of environmental contaminants. The aims of the present review are to critically discuss the available knowledge on (i) the expression and possible function of the AhR in the immune systems of teleost fishes; and (ii) the impact of AhR-activating xenobiotics on the immune systems of fish at the levels of immune gene expression, immune cell proliferation and immune cell function, immune pathology, and resistance to infectious disease. The existing information indicates that the AhR is expressed in the fish immune system, but currently, we have little understanding of its physiological role. Exposure to AhR-activating contaminants results in the modulation of numerous immune structural and functional parameters of fish. Despite the diversity of fish species studied and the experimental conditions investigated, the published findings rather uniformly point to immunosuppressive actions of xenobiotic AhR ligands in fish. These effects are often associated with increased disease susceptibility. The fact that fish populations from HAH- and PAH-contaminated environments suffer immune disturbances and elevated disease susceptibility highlights that the immunotoxic effects of AhR-activating xenobiotics bear environmental relevance.
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Affiliation(s)
- Helmut Segner
- Centre for Fish and Wildlife Health, Department of Pathobiology and Infectious Diseases, Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland
| | | | | | - Jun Bo
- Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, Xiamen 361005, China
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Sun S, Cao R, Jin J, Zhang Y, Gao Y, Lu X, Chen J, Zhang H. Accumulation characteristics and estimated dietary intakes of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and polychlorinated biphenyls in plant-origin foodstuffs from Chinese markets. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 775:145830. [PMID: 33621885 DOI: 10.1016/j.scitotenv.2021.145830] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 02/07/2021] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
The levels and accumulation characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) were investigated in nine pools of representative plant-origin foodstuffs randomly collected from markets located in five regions of the Chinese mainland during 2018-2019. The collected foodstuffs consisted of cereals, beans, potatoes, leafy vegetables, root and stem vegetables, melon vegetables, legume vegetables, edible fungi, and mixed vegetable oil. In the fresh plant food pools, the concentrations of toxic equivalency (WHO-TEQ) were in the ranges of 0.9-14.5 pg/kg in upperbound (UB) scenario and 0.002-7.3 pg/kg in lowerbound (LB) scenario on a fresh weight basis; and TriCDFs and TeCBs were the predominant PCDD/F and PCB homologues, respectively. In the mixed vegetable oil, the WHO-TEQ concentrations were 129.4 pg/kg and 103.6 pg/kg on a lipid weight basis in UB and LB scenarios, respectively; and high-chlorinated PCDD/F and PCB homologues were much more abundant. The estimated plant food-borne dietary intakes of WHO-TEQ by a standard adult in the five surveyed regions were in the ranges of 3.39-4.20 and 1.57-2.13 pg WHO-TEQ/kg body weight/month in UB and LB scenarios, respectively. Among all surveyed regions, consumption of cereals and vegetable oil made up the primary contributions to the estimated dietary intakes of WHO-TEQ. TriCDFs accounted for 41.1-83.9% of the PCDD/Fs dietary intakes via consumption of plant foods, and TeCBs made up 61.2-73.0% of the PCBs dietary intakes via consumption of plant foods, suggesting that the potential toxic effects of TriCDFs and TeCBs on human health should be concerned.
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Affiliation(s)
- Shuai Sun
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rong Cao
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Jing Jin
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yichi Zhang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yuan Gao
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xianbo Lu
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Jiping Chen
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Haijun Zhang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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Structural characterization of a novel Schisandra polysaccharides and nutritional intervention in immunotoxicity to PCBs. Carbohydr Polym 2021; 258:117380. [PMID: 33593586 DOI: 10.1016/j.carbpol.2020.117380] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 10/09/2020] [Accepted: 11/03/2020] [Indexed: 11/23/2022]
Abstract
A new polysaccharide from fruits of Schisandra chinensis (SCPP22) with a molecular weight of 143 ± 0.13 KDa was mainly made up of glucose and galactose. The possible structure of SCPP22 was showed that its main chain was composed of 1,4-α-d-Glup and branch was stretched from O-6 position of 1,4-β-d-Glup. Branches consisted of T-α-d-Galp. Further, SCPP22 could reverse PCB126-induced immunosuppression, significantly enhance body weight and immune organ indices. It also significantly ameliorated oxidative injury to immune organ induced by PCB126, as shown by evaluation of SOD activities, as well as MDA levels in spleen and thymus. SCPP22 strongly stimulated cytokines production by up-regulating mRNA expression of TNF-α, INF-γ and IL-2. Mechanism investigation revealed that recovery effects of SCPP22 in immunosuppression induced by PCB126 are mainly through regulating apoptosis-related proteins expression. Schisandra polysaccharides might be applied in functional food as nutritional intervention ingredient.
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Zhou WT, Wang LB, Yu H, Zhang KK, Chen LJ, Wang Q, Xie XL. N-acetylcysteine alleviates PCB52-induced hepatotoxicity by repressing oxidative stress and inflammatory responses. PeerJ 2020; 8:e9720. [PMID: 32864221 PMCID: PMC7427542 DOI: 10.7717/peerj.9720] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/23/2020] [Indexed: 12/15/2022] Open
Abstract
Polychlorinated biphenyls (PCBs), particularly low chlorinated congeners in our environment, can induce human hepatotoxicity. However, the mechanisms by which PCBs cause hepatotoxicity remain elusive. Moreover, there are no effective treatments for this condition. In this study, 40 μM PCB52 was administered to rat (Brl-3A) and human hepatocytes (L-02) for 48 h following the N-acetylcysteine (NAC)/saline pretreatment. A significant decrease in cell viability was observed in PCB52-treated cells relative to the control. Besides, PCB52 significantly increased reactive oxygen species (ROS) levels and malondialdehyde (MDA) contents, suggesting induction of oxidative stress. The expression of Traf6, MyD88, and Tnf in Brl-3A cells and that of MYD88, TNF, and IL1B in L-02 cells were significantly upregulated by PCB52. Consistently, overexpression of TLR4, MyD88, Traf6, and NF-κB p65 proteins was observed in PCB52-treated cells, indicating activation of inflammatory responses. Nevertheless, no changes in kelch-like ECH-associated protein 1 (keap1), nuclear factor-erythroid 2-related factor (nrf2), and heme oxygenase-1 proteins were observed in PCB52-treated cells, indicating non-activation of the keap1/nrf2 pathway. Pretreatment with NAC significantly ameliorated PCB52 effects on cell viability, ROS levels, MDA contents and expression of inflammatory elements at both RNA and protein levels. However, no changes in keap1, nrf2 and HO-1 protein levels were detected following NAC pretreatment. Taken together, with non-activated keap1/nrf2 pathway, PCB52-induced oxidative stress and inflammatory responses could be responsible for its hepatotoxicity. These effects were effectively attenuated by NAC pretreatment, which scavenges ROS and dampens inflammatory responses. This study might provide novel strategies for the treatment of the PCBs-associated hepatotoxic effects.
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Affiliation(s)
- Wen-Tao Zhou
- Department of Toxicology, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, China
| | - Li-Bin Wang
- Department of Toxicology, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, China
| | - Hao Yu
- The 2015 Class, 8-Year Program, The First Clinical Medical School, Southern Medical University, Guangzhou, China
| | - Kai-Kai Zhang
- Department of Forensic Pathology, School of Forensic Medicine, Southern Medical University, Guangzhou, China
| | - Li-Jian Chen
- Department of Forensic Pathology, School of Forensic Medicine, Southern Medical University, Guangzhou, China
| | - Qi Wang
- Department of Forensic Pathology, School of Forensic Medicine, Southern Medical University, Guangzhou, China
| | - Xiao-Li Xie
- Department of Toxicology, School of Public Health, Southern Medical University (Guangdong Provincial Key Laboratory of Tropical Disease Research), Guangzhou, China
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Shan Q, Chen N, Liu W, Qu F, Chen A. Exposure to 2,3,3',4,4',5-hexachlorobiphenyl promotes nonalcoholic fatty liver disease development in C57BL/6 mice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114563. [PMID: 32304952 DOI: 10.1016/j.envpol.2020.114563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/23/2020] [Accepted: 04/06/2020] [Indexed: 05/20/2023]
Abstract
Previous in vitro studies have indicated that 2,3,3',4,4',5-hexachlorobiphenyl (PCB 156) may be a new contributor to metabolic disruption and may further cause the occurrence of nonalcoholic fatty liver disease (NAFLD). However, no study has clarified the specific contributions of PCB 156 to NAFLD progression by constructing an in vivo model. Herein, we evaluated the effects of PCB 156 treatment (55 mg/kg, i.p.) on the livers of C57BL/6 mice fed a control diet (CD) or a high-fat diet (HFD). The results showed that PCB 156 administration increased intra-abdominal fat mass, hepatic lipid levels and dyslipidemia in the CD-fed group and aggravated NAFLD in HFD-fed group. By using transcriptomics studies and biological methods, we found that the genes expression involved in lipid metabolism pathways, such as lipogenesis, lipid accumulation and lipid β-oxidation, was greatly altered in liver tissues exposed to PCB 156. In addition, the cytochrome P450 pathway, peroxisome proliferator-activated receptors (PPARs) and the glutathione metabolism pathway were significantly activated following exposure to PCB 156. Furthermore, PCB 156 exposure increased serum transaminase levels and lipid peroxidation, and the redox-related genes were significantly dysregulated in liver tissue. In conclusion, our data suggested that PCB 156 could promote NAFLD development by altering the expression of genes related to lipid metabolism and inducing oxidative stress.
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Affiliation(s)
- Qiuli Shan
- College of Biological Science and Technology, University of Jinan, Jinan, 250022, China; State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Ningning Chen
- College of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Wei Liu
- State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Fan Qu
- College of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Anhui Chen
- Jiangsu Key Laboratory of Food Resource Development and Quality Safe, Xuzhou University of Technology, Xuzhou, China
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Liu J, Tan Y, Song E, Song Y. A Critical Review of Polychlorinated Biphenyls Metabolism, Metabolites, and Their Correlation with Oxidative Stress. Chem Res Toxicol 2020; 33:2022-2042. [DOI: 10.1021/acs.chemrestox.0c00078] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jing Liu
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang 550025, People’s Republic of China
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People’s Republic of China
| | - Ya Tan
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People’s Republic of China
| | - Erqun Song
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People’s Republic of China
| | - Yang Song
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People’s Republic of China
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17
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Insights into Aflatoxin B1 Toxicity in Cattle: An In Vitro Whole-Transcriptomic Approach. Toxins (Basel) 2020; 12:toxins12070429. [PMID: 32610656 PMCID: PMC7404968 DOI: 10.3390/toxins12070429] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 06/24/2020] [Accepted: 06/26/2020] [Indexed: 02/07/2023] Open
Abstract
Aflatoxins, and particularly aflatoxin B1 (AFB1), are toxic mycotoxins to humans and farm animal species, resulting in acute and chronic toxicities. At present, AFB1 is still considered a global concern with negative impacts on health, the economy, and social life. In farm animals, exposure to AFB1-contaminated feed may cause several untoward effects, liver damage being one of the most devastating ones. In the present study, we assessed in vitro the transcriptional changes caused by AFB1 in a bovine fetal hepatocyte-derived cell line (BFH12). To boost the cellular response to AFB1, cells were pre-treated with the co-planar PCB 3,3′,4,4′,5-pentachlorobiphenyl (PCB126), a known aryl hydrocarbon receptor agonist. Three experimental groups were considered: cells exposed to the vehicle only, to PCB126, and to PCB126 and AFB1. A total of nine RNA-seq libraries (three replicates/group) were constructed and sequenced. The differential expression analysis showed that PCB126 induced only small transcriptional changes. On the contrary, AFB1 deeply affected the cell transcriptome, the majority of significant genes being associated with cancer, cellular damage and apoptosis, inflammation, bioactivation, and detoxification pathways. Investigating mRNA perturbations induced by AFB1 in cattle BFH12 cells will help us to better understand AFB1 toxicodynamics in this susceptible and economically important food-producing species.
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18
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Jiaxin S, Shengchen W, Yirong C, Shuting W, Shu L. Cadmium exposure induces apoptosis, inflammation and immunosuppression through CYPs activation and antioxidant dysfunction in common carp neutrophils. FISH & SHELLFISH IMMUNOLOGY 2020; 99:284-290. [PMID: 32058096 DOI: 10.1016/j.fsi.2020.02.015] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/02/2020] [Accepted: 02/08/2020] [Indexed: 06/10/2023]
Abstract
Cadmium (Cd) is a bioaccumulative toxic heavy metal element that has been shown to cause irreversible damage to the immune system once contaminated with water, thereby jeopardizing the health of fish and other aquatic organisms. Neutrophils react against multiple invading pathogens through different mechanisms. The effect of Cd immunotoxicity in carp neutrophils has not been thoroughly studied. Here, common carp peripheral blood neutrophils were exposed to 10 μmol/L Cd for 2 h or then stimulated with 20 nmol/L PMA under laboratory conditions to study the effect and potential mechanism of Cd on neutrophils. The results showed that Cd induced mRNA expression of Cytochrome P450s (CYPs) enzymes including CYP1A1, CYP1B1, CYP1C and CYP3A138, increased reactive oxygen species (ROS) levels, and enhanced the expression of antioxidant genes. In addition, Cd activated cysteinyl aspartate specific proteinases (caspase-3) and induced apoptosis by altering the expression of major genes including mitochondrial pathway factors such as B-cell lymphoma-2 (Bcl-2), pro-apoptosis factors Bcl-2-Associated X (BAX), and caspase-9 and death receptor pathways such as Fas/Fas ligand (Fas/FasL), tumour necrosis factor alpha/tumor necrosis factor receptor 1 (TNF-α/TNFR1) and caspase-8. Meanwhile, we found that the accumulation of ROS caused not only oxidative stress but also high expression levels of related inflammatory factors to mediate the immune response including interleukin (IL-6, IL-10, IL-11b, IL-1β) and interferon (IFNg1, IFNph1). Furthermore, Cd also inhibited phorbol myristate acetate (PMA)-induced release of neutrophil extracellular traps (NETs) and respiratory burst. This information will be helpful for the elucidation of how Cd impacts the neutrophils of carp. The associated risk assessment is valuable for effective aquatic environmental management.
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Affiliation(s)
- Sun Jiaxin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Wang Shengchen
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Cao Yirong
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Wang Shuting
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Li Shu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China.
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