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Hernández-Cruz EY, Aparicio-Trejo OE, Eugenio-Pérez D, Juárez-Peredo E, Zurita-León M, Valdés VJ, Pedraza-Chaverri J. Sulforaphane Exposure Prevents Cadmium-Induced Toxicity and Mitochondrial Dysfunction in the Nematode Caenorhabditis elegans by Regulating the Insulin/Insulin-like Growth Factor Signaling (IIS) Pathway. Antioxidants (Basel) 2024; 13:584. [PMID: 38790689 PMCID: PMC11117759 DOI: 10.3390/antiox13050584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/05/2024] [Accepted: 05/06/2024] [Indexed: 05/26/2024] Open
Abstract
Cadmium (Cd) is a heavy metal that is highly toxic to humans and animals. Its adverse effects have been widely associated with mitochondrial alterations. However, there are not many treatments that target mitochondria. This study aimed to evaluate the impact of sulforaphane (SFN) pre-exposure against cadmium chloride (CdCl2)-induced toxicity and mitochondrial alterations in the nematode Caenorhabditis elegans (C. elegans), by exploring the role of the insulin/insulin-like growth factor signaling pathway (IIS). The results revealed that prior exposure to SFN protected against CdCl2-induced mortality and increased lifespan, body length, and mobility while reducing lipofuscin levels. Furthermore, SFN prevented mitochondrial alterations by increasing mitochondrial membrane potential (Δψm) and restoring mitochondrial oxygen consumption rate, thereby decreasing mitochondrial reactive oxygen species (ROS) production. The improvement in mitochondrial function was associated with increased mitochondrial mass and the involvement of the daf-16 and skn-1c genes of the IIS signaling pathway. In conclusion, exposure to SFN before exposure to CdCl2 mitigates toxic effects and mitochondrial alterations, possibly by increasing mitochondrial mass, which may be related to the regulation of the IIS pathway. These discoveries open new possibilities for developing therapies to reduce the damage caused by Cd toxicity and oxidative stress in biological systems, highlighting antioxidants with mitochondrial action as promising tools.
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Affiliation(s)
- Estefani Yaquelin Hernández-Cruz
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico; (E.Y.H.-C.); (D.E.-P.); (E.J.-P.)
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Mexico City 04510, Mexico
| | - Omar Emiliano Aparicio-Trejo
- Departamento de Fisiopatología Cardio-Renal, Instituto Nacional de Cardiología “Ignacio Chávez”, Mexico City 14080, Mexico;
| | - Dianelena Eugenio-Pérez
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico; (E.Y.H.-C.); (D.E.-P.); (E.J.-P.)
- Posgrado en Ciencias Bioquímicas, Universidad Nacional Autónoma de México (UNAM), Biochemical Sciences, Ciudad Universitaria, Mexico City 04510, Mexico
| | - Elí Juárez-Peredo
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico; (E.Y.H.-C.); (D.E.-P.); (E.J.-P.)
| | - Mariana Zurita-León
- Departamento de Biología y Desarrollo Celular, Instituto de Fisiología Celular (IFC), Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico; (M.Z.-L.); (V.J.V.)
| | - Víctor Julián Valdés
- Departamento de Biología y Desarrollo Celular, Instituto de Fisiología Celular (IFC), Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico; (M.Z.-L.); (V.J.V.)
| | - José Pedraza-Chaverri
- Laboratorio F-315, Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico; (E.Y.H.-C.); (D.E.-P.); (E.J.-P.)
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Miao X, Zhang X, Yuan Y, Zhang Y, Gao J, Kang N, Liu X, Wu J, Liu Y, Tan P. The toxicity assessment of extract of Peganum harmala L. seeds in Caenorhabditis elegans. BMC Complement Med Ther 2020; 20:256. [PMID: 32807143 PMCID: PMC7433056 DOI: 10.1186/s12906-020-03051-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 08/11/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Peganum harmala L. is a medicinal herb extensively used in traditional Chinese medicine (TCM). So far, relevant reports on the toxicity of Peganum harmala L. seeds (PHS) are hardly available. Especially, we still know little about the in vivo mechanism for PHS toxicity. This study aims to evaluate the toxicity effects of PHS in Caenorhabditis elegans (C. elegans), investigate the possible mechanism of the toxicity effects of PHS, and provide reference for the pharmacological research of PHS. METHODS In the present study, the C. elegans was exposed to 0.25, 0.50, 1.00 mg/mL of PHS in nematode growth medium (NGM) at 22 °C in the presence of food. Lethality, lifespan, growth, reproduction, and locomotion behavior assays were performed to evaluate the toxicity effects of PHS in C. elegans. We then determined the mechanism of the toxicity effect of PHS by quantitative real-time polymerase chain reaction (qRT-PCR), acetylcholinesterase (AChE) activity assay, and oxidative stress resistance assays. The main components of PHS were detected by high performance liquid chromatography (HPLC). RESULTS Compared with the control group, the lethality of C. elegans was significantly increased when they were exposed to the ethanol extract of PHS at 0.25, 0.50 and 1.00 mg/mL (P < 0.01), and the mean lifespan was significantly decreased (P < 0.01). We also observed that PHS exposure could induce the toxicity on body length, brood size, and locomotion behavior. CONCLUSION Our study shows that the ethanol extract of PHS exerts obvious toxic effects on C. elegans, which would provide new ideas and methods for the biological evaluation of the toxicity of Chinese medicinal materials.
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Affiliation(s)
- Xiangzhen Miao
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Xiao Zhang
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Yanyan Yuan
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Yali Zhang
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Jian Gao
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Nianxin Kang
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Xinkui Liu
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Jiarui Wu
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Yonggang Liu
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China
| | - Peng Tan
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, No. 11, Bei San Huan Dong Lu, Chaoyang District, Beijing, 100029, China.
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Xiao X, Zhang X, Zhang C, Li J, Zhao Y, Zhu Y, Zhang J, Zhou X. Toxicity and multigenerational effects of bisphenol S exposure to Caenorhabditis elegans on developmental, biochemical, reproductive and oxidative stress. Toxicol Res (Camb) 2019; 8:630-640. [PMID: 31559007 DOI: 10.1039/c9tx00055k] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 05/21/2019] [Indexed: 12/28/2022] Open
Abstract
Bisphenol A (BPA) is a typical endocrine disruptor. Bisphenol S (BPS) has been widely used as a substitute for various plastic materials due to the limited application of BPA. However, it does not mean that BPS is a safe substitute due to the lack of effective evaluation of BPS. In this study, the clinical model of Caenorhabditis elegans (C. elegans) was used to study the effects of BPS on the locomotion behavior, growth, reproduction, lifespan and antioxidant system. Our study found that C. elegans exposed to 0.01 μM BPS could have significantly inhibited locomotion behavior and growth, as well as damaged reproductive and antioxidant systems and lifespan. It is interesting to note that in multi-generational exposure studies, we found that BPS exhibits complex genotoxicity. With the transmission to the offspring, BPS showed more significant inhibition of the head thrashes of the nematode, while the effect on the body bends and body length was gradually weakened. The effect of BPS on the brood size shows different rules according to different concentrations and offsprings. Therefore, the safety of BPS still needs further evaluation, especially the multi-generational genotoxicity.
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Affiliation(s)
- Xiang Xiao
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , PR China . ; ; Tel: +86-511-88797202
| | - Xiaowei Zhang
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , PR China . ; ; Tel: +86-511-88797202
| | - Caiqin Zhang
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , PR China . ; ; Tel: +86-511-88797202
| | - Jie Li
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , PR China . ; ; Tel: +86-511-88797202
| | - Yansheng Zhao
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , PR China . ; ; Tel: +86-511-88797202
| | - Ying Zhu
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , PR China . ; ; Tel: +86-511-88797202
| | - Jiayan Zhang
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , PR China . ; ; Tel: +86-511-88797202
| | - Xinghua Zhou
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , PR China . ; ; Tel: +86-511-88797202
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Cao H, Luo Q, Wang H, Liu Z, Li G, Liu J. Structural characterization of peptides fromLocusta migratoria manilensis(Meyen, 1835) and anti-aging effect inCaenorhabditis elegans. RSC Adv 2019; 9:9289-9300. [PMID: 35517704 PMCID: PMC9061974 DOI: 10.1039/c9ra00089e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 03/07/2019] [Indexed: 12/02/2022] Open
Abstract
Locusts are a kind of agricultural pest rich in protein and widely eaten by people, yet, the nutritional and antioxidant activities of locust peptide have never been explored. In the current study, the locust peptides (LPs) were isolated from the Locusta migratoria manilensis (Meyen, 1835) and the anti-aging effects on Caenorhabditis elegans (C. elegans) were evaluated. The mean lifespan of C. elegans was significantly extended using LPs with a concentration of 1.0 mg mL−1. Out of the 23 peptides, LP-1, a pentapeptide with The-Phe-Lys-His-Gly sequence, with a concentration of 2.5 mg mL−1 significantly extended the lifespan of the worms by 23.5%. Additionally, LP-1 was observed to be a strong free radical-scavenger which can improve the survival of the C. elegans under oxidative stress, thermal stress and UV radiation. Furthermore, the LP-1 can up-regulate the expression of the transcription factor DAF-16 and jnk-1, suggesting that LP-1 may promote the C. elegans lifespan and stress resistance through a JNK-1-DAF-16 pathway. This study will be significant for the development of locusts and improvement of functional insect peptide production. Locusts are a kind of agricultural pest rich in protein and widely eaten by people, yet, the nutritional and antioxidant activities of locust peptide have never been explored.![]()
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Affiliation(s)
- Hui Cao
- The Research Center of Allergy & Immunology
- Shenzhen University School of Medicine
- Shenzhen
- PR China
| | - Qiang Luo
- The Research Center of Allergy & Immunology
- Shenzhen University School of Medicine
- Shenzhen
- PR China
| | - Huailing Wang
- The Research Center of Allergy & Immunology
- Shenzhen University School of Medicine
- Shenzhen
- PR China
- Department of Allergy
| | - Zhigang Liu
- The Research Center of Allergy & Immunology
- Shenzhen University School of Medicine
- Shenzhen
- PR China
- Department of Allergy
| | - Guoqiang Li
- College of Food Science and Engineering
- Foshan University
- Foshan 528000
- PR China
| | - Jie Liu
- The Research Center of Allergy & Immunology
- Shenzhen University School of Medicine
- Shenzhen
- PR China
- Department of Allergy
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Shu C, Sun L, Zhang W. Thymol has antifungal activity against Candida albicans during infection and maintains the innate immune response required for function of the p38 MAPK signaling pathway in Caenorhabditis elegans. Immunol Res 2017; 64:1013-24. [PMID: 26783030 DOI: 10.1007/s12026-016-8785-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The Caenorhabditis elegans model can be used to study Candida albicans virulence and host immunity, as well as to identify plant-derived natural products to use against C. albicans. Thymol is a hydrophobic phenol compound from the aromatic plant thyme. In this study, the in vitro data demonstrated concentration-dependent thymol inhibition of both C. albicans growth and biofilm formation during different developmental phases. With the aid of the C. elegans system, we performed in vivo assays, and our results further showed the ability of thymol to increase C. elegans life span during infection, inhibit C. albicans colony formation in the C. elegans intestine, and increase the expression levels of host antimicrobial genes. Moreover, among the genes that encode the p38 MAPK signaling pathway, mutation of the pmk-1 or sek-1 gene decreased the beneficial effects of thymol's antifungal activity against C. albicans and thymol's maintenance of the innate immune response in nematodes. Western blot data showed the level of phosphorylation of pmk-1 was dramatically decreased against C. albicans. In nematodes, treatment with thymol recovered the dysregulation of pmk-1 and sek-1 gene expressions, the phosphorylation level of PMK-1 caused by C. albicans infection. Therefore, thymol may act, at least in part, through the function of the p38 MAPK signaling pathway to protect against C. albicans infection and maintain the host innate immune response to C. albicans. Our results indicate that the p38 MAPK signaling pathway plays a crucial role in regulating the beneficial effects observed after nematodes infected with C. albicans were treated with thymol.
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Affiliation(s)
- Chengjie Shu
- College of Life Sciences, Nanjing Normal University, Nanjing, 210032, China.,Institute for Comprehensive Utilization of Wild Plants, Nanjing, 210042, China
| | - Lingmei Sun
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, 210009, China
| | - Weiming Zhang
- College of Life Sciences, Nanjing Normal University, Nanjing, 210032, China. .,Institute for Comprehensive Utilization of Wild Plants, Nanjing, 210042, China.
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Dietrich N, Tan CH, Cubillas C, Earley BJ, Kornfeld K. Insights into zinc and cadmium biology in the nematode Caenorhabditis elegans. Arch Biochem Biophys 2016; 611:120-133. [PMID: 27261336 DOI: 10.1016/j.abb.2016.05.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/18/2016] [Accepted: 05/28/2016] [Indexed: 10/21/2022]
Abstract
Zinc is an essential metal that is involved in a wide range of biological processes, and aberrant zinc homeostasis is implicated in multiple human diseases. Cadmium is chemically similar to zinc, but it is a nonessential environmental pollutant. Because zinc deficiency and excess are deleterious, animals require homeostatic mechanisms to maintain zinc levels in response to dietary fluctuations. The nematode Caenorhabditis elegans is emerging as a powerful model system to investigate zinc trafficking and homeostasis as well as cadmium toxicity. Here we review genetic and molecular studies that have combined to generate a picture of zinc homeostasis based on the transcriptional control of zinc transporters in intestinal cells. Furthermore, we summarize studies of cadmium toxicity that reveal intriguing parallels with zinc biology.
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Affiliation(s)
- Nicholas Dietrich
- Department of Developmental Biology, Washington University School of Medicine, Campus Box 8103, 660 South Euclid Avenue, St. Louis, MO 63110, United States.
| | - Chieh-Hsiang Tan
- Department of Developmental Biology, Washington University School of Medicine, Campus Box 8103, 660 South Euclid Avenue, St. Louis, MO 63110, United States
| | - Ciro Cubillas
- Department of Developmental Biology, Washington University School of Medicine, Campus Box 8103, 660 South Euclid Avenue, St. Louis, MO 63110, United States
| | - Brian James Earley
- Department of Developmental Biology, Washington University School of Medicine, Campus Box 8103, 660 South Euclid Avenue, St. Louis, MO 63110, United States
| | - Kerry Kornfeld
- Department of Developmental Biology, Washington University School of Medicine, Campus Box 8103, 660 South Euclid Avenue, St. Louis, MO 63110, United States
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Wang D. Biological effects, translocation, and metabolism of quantum dots in the nematode Caenorhabditis elegans. Toxicol Res (Camb) 2016; 5:1003-1011. [PMID: 30090407 DOI: 10.1039/c6tx00056h] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 04/29/2016] [Indexed: 12/16/2022] Open
Abstract
Quantum dots (QDs), semiconductor nanomaterials with tiny light-emitting particles, act as important alternatives to conventional fluorescent dyes for biomedical imaging. With the increased tendency towards QD applications, concerns about the likelihood of adverse health impacts from exposure to QDs have also received attention. The nematode Caenorhabditis elegans is an important non-mammalian alternative model for the toxicological study of environmental toxicants including engineered nanomaterials. In this review, we summarize recent progress on the biological effects, translocation, and metabolism of QDs in the in vivo assay system of C. elegans. Moreover, certain perspectives or suggestions are further raised for the future toxicological study of QDs in nematodes.
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Affiliation(s)
- Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School , Southeast University , Nanjing 210009 , China .
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A MicroRNA-Mediated Insulin Signaling Pathway Regulates the Toxicity of Multi-Walled Carbon Nanotubes in Nematode Caenorhabditis elegans. Sci Rep 2016; 6:23234. [PMID: 26984256 PMCID: PMC4794644 DOI: 10.1038/srep23234] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 03/02/2016] [Indexed: 12/25/2022] Open
Abstract
The underlying mechanisms for functions of microRNAs (miRNAs) in regulating toxicity of nanomaterials are largely unclear. Using Illumina HiSeq(TM) 2000 sequencing technique, we obtained the dysregulated mRNA profiling in multi-walled carbon nanotubes (MWCNTs) exposed nematodes. Some dysregulated genes encode insulin signaling pathway. Genetic experiments confirmed the functions of these dysregulated genes in regulating MWCNTs toxicity. In the insulin signaling pathway, DAF-2/insulin receptor regulated MWCNTs toxicity by suppressing function of DAF-16/FOXO transcription factor. Moreover, we raised a miRNAs-mRNAs network involved in the control of MWCNTs toxicity. In this network, mir-355 might regulate MWCNTs toxicity by inhibiting functions of its targeted gene of daf-2, suggesting that mir-355 may regulate functions of the entire insulin signaling pathway by acting as an upregulator of DAF-2, the initiator of insulin signaling pathway, in MWCNTs exposed nematodes. Our results provides highlight on understanding the crucial role of miRNAs in regulating toxicity of nanomaterials in organisms.
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Ruan Q, Qiao Y, Zhao Y, Xu Y, Wang M, Duan J, Wang D. Beneficial effects of Glycyrrhizae radix extract in preventing oxidative damage and extending the lifespan of Caenorhabditis elegans. JOURNAL OF ETHNOPHARMACOLOGY 2016; 177:101-110. [PMID: 26626487 DOI: 10.1016/j.jep.2015.10.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 09/08/2015] [Accepted: 10/02/2015] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Glycyrrhizae radix (GR) is a medicinal herb extensively used in traditional Chinese medicine. This study aimed to evaluate the pharmacological effect of GR and the possible mechanisms of GR, to provide a pharmacological basis in traditional medicine. MATERIALS AND METHODS In the present study, C. elegans (L1-larvae to young adults) was exposed to 0.12-0.24 g/mL of GR in 12-well sterile tissue culture plates at 20°C in the presence of food. Lethality, growth, lifespan, reproduction, locomotion, metabolism, intestinal autofluorescence, and reactive oxygen species (ROS) production assays were performed to investigate the possible safety profile and beneficial effects of GR in these nematodes. We found that the lifespan of nematodes exposed to 0.18-0.24 g/mL of GR was extended. We then determined the mechanism of the longevity effect of GR using quantitative reverse transcription PCR and oxidative stress resistance assays induced by heat and paraquat. RESULTS Prolonged exposure to 0.12-0.24 g/mL of GR did not induce lethality, alter body length, morphology or metabolism, affect brood size, locomotion, the development of D-type GABAergic motor neurons, or induce significant induction of intestinal autofluorescence and intestinal ROS production. In C. elegans, pretreatment with GR suppressed the damage due to heat-stress or oxidative stress induced by paraquat, a ROS generator, on lifespan, and inhibited the induction of intestinal ROS production induced by paraquat. Moreover, prolonged exposure to GR extended lifespan, increased locomotion and decreased intestinal ROS production in adult day-12 nematodes. Furthermore, prolonged exposure to GR significantly altered the expression patterns of genes encoding the insulin-like signaling pathway which had a key role in longevity control. Mutation of daf-16 gene encoding the FOXO transcription factor significantly decreased lifespan, suppressed locomotion, and increased intestinal ROS production in GR exposed adult nematodes. CONCLUSIONS GR is relatively safe and has protective effects against the damage caused by both heat-stress and oxidative stress at the examined concentrations. Furthermore, GR is capable of extending the lifespan of nematodes, and the insulin-like signaling pathway may play a crucial role in regulating the lifespan-extending effects of GR.
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Affiliation(s)
- Qinli Ruan
- Center for Drug Safety Evaluation and Research, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yan Qiao
- Center for Drug Safety Evaluation and Research, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yunli Zhao
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China
| | - Yun Xu
- Center for Drug Safety Evaluation and Research, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Meng Wang
- Center for Drug Safety Evaluation and Research, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Jinao Duan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Dayong Wang
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China.
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Yu X, Guan X, Wu Q, Zhao Y, Wang D. Vitamin E ameliorates neurodegeneration related phenotypes caused by neurotoxicity of Al2O3-nanoparticles in C. elegans. Toxicol Res (Camb) 2015. [DOI: 10.1039/c5tx00029g] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Vitamin E has the potential to ameliorate the neurotoxicity of Al2O3-nanoparticles that induce neurodegeneration related phenotypes inC. elegans.
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Affiliation(s)
- Xiaoming Yu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
| | - Xiangmin Guan
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
| | - Qiuli Wu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
| | - Yunli Zhao
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
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11
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Zhao Y, Wu Q, Wang D. A microRNAs–mRNAs network involved in the control of graphene oxide toxicity in Caenorhabditis elegans. RSC Adv 2015. [DOI: 10.1039/c5ra16142h] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A microRNAs–mRNAs network involved in the control of graphene oxide toxicity was raised in nematodes.
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Affiliation(s)
- Yunli Zhao
- Medical School
- Southeast University
- Nanjing 210009
- China
| | - Qiuli Wu
- Medical School
- Southeast University
- Nanjing 210009
- China
| | - Dayong Wang
- Medical School
- Southeast University
- Nanjing 210009
- China
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Yang R, Zhao Y, Yu X, Lin Z, Xi Z, Rui Q, Wang D. Insulin signaling regulates the toxicity of traffic-related PM2.5 on intestinal development and function in nematode Caenorhabditis elegans. Toxicol Res (Camb) 2015. [DOI: 10.1039/c4tx00131a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Insulin signaling pathway may act as an important molecular basis for the toxicity of traffic-related PM2.5 in Caenorhabditis elegans, a non-mammalian toxicological model.
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Affiliation(s)
- Ruilong Yang
- College of Life Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
| | - Yunli Zhao
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
| | - Xiaoming Yu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
| | - Zhiqing Lin
- Institute of Health and Environmental Medicine
- Key Laboratory of Risk Assessment and Control Technology for Environmental & Food Safety
- Tianjin 300050
- China
| | - Zhuge Xi
- Institute of Health and Environmental Medicine
- Key Laboratory of Risk Assessment and Control Technology for Environmental & Food Safety
- Tianjin 300050
- China
| | - Qi Rui
- College of Life Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
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Shu C, Yu X, Wu Q, Zhuang Z, Zhang W, Wang D. Pretreatment with paeonol prevents the adverse effects and alters the translocation of multi-walled carbon nanotubes in nematode Caenorhabditis elegans. RSC Adv 2015. [DOI: 10.1039/c4ra14377a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Pretreatment with paeonol alters toxicity and translocation of MWCNTs in nematodes.
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Affiliation(s)
- Chengjie Shu
- College of Life Sciences
- Nanjing Normal University
- Nanjing 210046
- China
- Nanjing Institute for Comprehensive Utilization of Wild Plants
| | - Xiaoming Yu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
| | - Qiuli Wu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
| | - Ziheng Zhuang
- School of Pharmaceutical Engineering and Life Sciences
- Changzhou University
- Changzhou 213164
- China
| | - Weiming Zhang
- College of Life Sciences
- Nanjing Normal University
- Nanjing 210046
- China
- Nanjing Institute for Comprehensive Utilization of Wild Plants
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education
- Medical School of Southeast University
- Nanjing 210009
- China
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14
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Qiao Y, Zhao Y, Wu Q, Sun L, Ruan Q, Chen Y, Wang M, Duan J, Wang D. Full toxicity assessment of Genkwa Flos and the underlying mechanism in nematode Caenorhabditis elegans. PLoS One 2014; 9:e91825. [PMID: 24626436 PMCID: PMC3953530 DOI: 10.1371/journal.pone.0091825] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 02/16/2014] [Indexed: 01/10/2023] Open
Abstract
Genkwa Flos (GF), the dried flower bud from Daphne genkwa Sieb. et Zucc. (Thymelaeaceae), is a well-known and widely used traditional Chinese medicine. However, we know little about the in vivo mechanism of GF toxicity. Nematode Caenorhabditis elegans has been considered as a useful toxicity assay system by offering a system best suited for asking the in vivo questions. In the present study, we employed the prolonged exposure assay system of C. elegans to perform the full in vivo toxicity assessment of raw-processed GF. Our data show that GF exposure could induce the toxicity on lifespan, development, reproduction, and locomotion behavior. GF exposure not only decreased body length but also induced the formation of abnormal vulva. The decrease in brood size in GF exposed nematodes appeared mainly at day-1 during the development of adult nematodes. The decrease of locomotion behavior in GF exposed nematodes might be due to the damage on development of D-type GABAergic motor neurons. Moreover, we observed the induction of intestinal reactive oxygen species (ROS) production and alteration of expression patterns of genes required for development of apical domain, microvilli, and apical junction of intestine in GF exposed nematodes, implying the possible dysfunction of the primary targeted organ. In addition, GF exposure induced increase in defecation cycle length and deficits in development of AVL and DVB neurons controlling the defecation behavior. Therefore, our study implies the usefulness of C. elegans assay system for toxicity assessment from a certain Chinese medicine or plant extract. The observed toxicity of GF might be the combinational effects of oxidative stress, dysfunction of intestine, and altered defecation behavior in nematodes.
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Affiliation(s)
- Yan Qiao
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing, China
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, China
| | - Yunli Zhao
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, China
| | - Qiuli Wu
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, China
| | - Lingmei Sun
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, China
| | - Qinli Ruan
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yanyan Chen
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing, China
| | - Meng Wang
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jinao Duan
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing, China
| | - Dayong Wang
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, China
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15
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Wu Q, Yin L, Li X, Tang M, Zhang T, Wang D. Contributions of altered permeability of intestinal barrier and defecation behavior to toxicity formation from graphene oxide in nematode Caenorhabditis elegans. NANOSCALE 2013; 5:9934-9943. [PMID: 23986404 DOI: 10.1039/c3nr02084c] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Graphene oxide (GO) has been extensively studied for potential biomedical applications. Meanwhile, potential GO toxicity arises in both biomedical applications and non-biomedical products where environmental exposures may occur. In the present study, we examined the potential adverse effects of GO and the underlying mechanism using nematode Caenorhabditis elegans as the assay system. We compared the in vivo effects of GO between acute exposure and prolonged exposure, and found that prolonged exposure to 0.5-100 mg L(-1) of GO caused damage on functions of both primary (intestine) and secondary (neuron and reproductive organ) targeted organs. In the intestine, ROS production was significantly correlated with the formation of adverse effects on functions of both primary and secondary targeted organs. GO could be translocated into intestinal cells with loss of microvilli, and distributed to be adjacent to or surrounding mitochondria. Prolonged exposure to GO resulted in a hyper-permeable state of the intestinal barrier, an increase in mean defecation cycle length, and alteration of genes required for intestinal development and defecation behavior. Thus, our data suggest that prolonged exposure to GO may cause potential risk to environmental organisms after release into the environment. GO toxicity may be due to the combinational effects of oxidative stress in the intestinal barrier, enhanced permeability of the biological barrier, and suppressed defecation behavior in C. elegans.
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Affiliation(s)
- Qiuli Wu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China.
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16
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Zhang W, Lv T, Li M, Wu Q, Yang L, Liu H, Sun D, Sun L, Zhuang Z, Wang D. Beneficial effects of wheat gluten hydrolysate to extend lifespan and induce stress resistance in nematode Caenorhabditis elegans. PLoS One 2013; 8:e74553. [PMID: 24040279 PMCID: PMC3767650 DOI: 10.1371/journal.pone.0074553] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 08/03/2013] [Indexed: 01/20/2023] Open
Abstract
Previous studies have showed that wheat gluten hydrolysate (WGH) has the anti-oxidative property. In the present study, we examined the possible safety property of WGH and the beneficial effects of WGH to extend lifespan and induce stress resistance using nematode Caenorhabditis elegans as the in vivo assay system. We found that WGH at concentrations of 0.1–1 mg/mL did not cause lethality, influence development, alter locomotion behavior and brood size, and induce significant intestinal autofluorescence and reactive oxygen species (ROS) production in young adults. Treatment with 0.1–1 mg/mL of WGH significantly extended lifespans of nematodes under the normal conditions. Moreover, WGH treatment significantly inhibited the induction of intestinal autofluorescence and suppressed the decrease in locomotion behavior during the aging process of nematodes. Furthermore, pre-treatment with 1 mg/mL of WGH significantly suppressed the adverse effects caused by heat-stress or oxidative stress on nematodes as indicated by the alterations of both lifespan and intestinal ROS production. Therefore, WGH treatment is relatively safe and has beneficial effects on nematodes under both the normal conditions and the stress conditions.
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Affiliation(s)
- Weiming Zhang
- College of Life Sciences, Nanjing Normal University, Nanjing, China
- Nanjing Institute for Comprehensive Utilization of Wild Plants, Nanjing, China
| | - Ting Lv
- College of Life Sciences, Nanjing Normal University, Nanjing, China
- Nanjing Institute for Comprehensive Utilization of Wild Plants, Nanjing, China
| | - Min Li
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Qiuli Wu
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, China
| | - Linsong Yang
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Hui Liu
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Dafeng Sun
- Nanjing Institute for Comprehensive Utilization of Wild Plants, Nanjing, China
| | - Lingmei Sun
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, China
| | - Ziheng Zhuang
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
- * E-mail: (ZZ); (DW)
| | - Dayong Wang
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Medical School of Southeast University, Nanjing, China
- * E-mail: (ZZ); (DW)
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17
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Wu Q, Nouara A, Li Y, Zhang M, Wang W, Tang M, Ye B, Ding J, Wang D. Comparison of toxicities from three metal oxide nanoparticles at environmental relevant concentrations in nematode Caenorhabditis elegans. CHEMOSPHERE 2013; 90:1123-1131. [PMID: 23062833 DOI: 10.1016/j.chemosphere.2012.09.019] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 07/06/2012] [Accepted: 09/08/2012] [Indexed: 06/01/2023]
Abstract
Nematode Caenorhabditis elegans has been developed in a variety of environmental studies to address adverse effects of a wide range of toxicants. In the present study, we compared the toxicities of three metal oxide nanoparticles (NPs) including TiO(2)-NPs, ZnO-NPs, and SiO(2)-NPs with the same nanosize (30 nm) after prolonged exposure from L1-larvae to adult at environmental relevant concentrations. Our data indicated that the adverse effects were detected in nematodes exposed to TiO(2)-NPs and ZnO-NPs at concentrations more than 0.05 μg/L and SiO(2)-NPs at concentrations more than 5 μg/L with locomotion behavior and ROS production as endpoints. With growth, locomotion behavior, reproduction, and ROS production as endpoints, toxicity order for the examined metal oxide NPs was: ZnO-NPs>TiO(2)-NPs>SiO(2)-NPs. In nematodes exposed to the examined metal oxide NPs, ROS production was significantly correlated with lethality, growth, reproduction, and locomotion behavior. Moreover, treatment with antioxidants of ascorbate or NAC effectively inhibited the formation of oxidative stress and retrieved the adverse effects of TiO(2)-NPs, ZnO-NPs, and SiO(2)-NPs on survival, growth, reproduction and locomotion behaviors in nematodes. Our data demonstrated the subtle toxicity differences of different NPs exposure at environmental relevant concentrations in C. elegans.
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Affiliation(s)
- Qiuli Wu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China
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18
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Formation and regulation of adaptive response in nematode Caenorhabditis elegans. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2012; 2012:564093. [PMID: 22997543 PMCID: PMC3446806 DOI: 10.1155/2012/564093] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Accepted: 06/24/2012] [Indexed: 01/11/2023]
Abstract
All organisms respond to environmental stresses (e.g., heavy metal, heat, UV irradiation, hyperoxia, food limitation, etc.) with coordinated adjustments in order to deal with the consequences and/or injuries caused by the severe stress. The nematode Caenorhabditis elegans often exerts adaptive responses if preconditioned with low concentrations of agents or stressor. In C. elegans, three types of adaptive responses can be formed: hormesis, cross-adaptation, and dietary restriction. Several factors influence the formation of adaptive responses in nematodes, and some mechanisms can explain their response formation. In particular, antioxidation system, heat-shock proteins, metallothioneins, glutathione, signaling transduction, and metabolic signals may play important roles in regulating the formation of adaptive responses. In this paper, we summarize the published evidence demonstrating that several types of adaptive responses have converged in C. elegans and discussed some possible alternative theories explaining the adaptive response control.
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Molecular control of TiO₂-NPs toxicity formation at predicted environmental relevant concentrations by Mn-SODs proteins. PLoS One 2012; 7:e44688. [PMID: 22973466 PMCID: PMC3433426 DOI: 10.1371/journal.pone.0044688] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 08/07/2012] [Indexed: 01/29/2023] Open
Abstract
With growing concerns of the safety of nanotechnology, the in vivo toxicity of nanoparticles (NPs) at environmental relevant concentrations has drawn increasing attentions. We investigated the possible molecular mechanisms of titanium nanoparticles (Ti-NPs) in the induction of toxicity at predicted environmental relevant concentrations. In nematodes, small sizes (4 nm and 10 nm) of TiO2-NPs induced more severe toxicities than large sizes (60 nm and 90 nm) of TiO2-NPs on animals using lethality, growth, reproduction, locomotion behavior, intestinal autofluorescence, and reactive oxygen species (ROS) production as endpoints. Locomotion behaviors could be significantly decreased by exposure to 4-nm and 10-nm TiO2-NPs at concentration of 1 ng/L in nematodes. Among genes required for the control of oxidative stress, only the expression patterns of sod-2 and sod-3 genes encoding Mn-SODs in animals exposed to small sizes of TiO2-NPs were significantly different from those in animals exposed to large sizes of TiO2-NPs. sod-2 and sod-3 gene expressions were closely correlated with lethality, growth, reproduction, locomotion behavior, intestinal autofluorescence, and ROS production in TiO2-NPs-exposed animals. Ectopically expression of human and nematode Mn-SODs genes effectively prevented the induction of ROS production and the development of toxicity of TiO2-NPs. Therefore, the altered expression patterns of Mn-SODs may explain the toxicity formation for different sizes of TiO2-NPs at predicted environmental relevant concentrations. In addition, we demonstrated here a strategy to investigate the toxicological effects of exposure to NPs upon humans by generating transgenic strains in nematodes for specific human genes.
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Li Y, Yu S, Wu Q, Tang M, Pu Y, Wang D. Chronic Al2O3-nanoparticle exposure causes neurotoxic effects on locomotion behaviors by inducing severe ROS production and disruption of ROS defense mechanisms in nematode Caenorhabditis elegans. JOURNAL OF HAZARDOUS MATERIALS 2012; 219-220:221-230. [PMID: 22521136 DOI: 10.1016/j.jhazmat.2012.03.083] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Revised: 03/30/2012] [Accepted: 03/31/2012] [Indexed: 05/31/2023]
Abstract
To date, knowledge on mechanisms regarding the chronic nanotoxicity is still largely minimal. In the present study, the effect of chronic (10-day) Al(2)O(3)-nanoparticles (NPs) toxicity on locomotion behavior was investigated in the nematode Caenorhabditis elegans. Exposure to 0.01-23.1 mg/L of Al(2)O(3)-NPs induced a decrease in locomotion behavior, a severe stress response, and a severe oxidative stress; however, these effects were only detected in nematodes exposed to 23.1 mg/L of bulk Al(2)O(3). Formation of significant oxidative stress in nematodes exposed to Al(2)O(3)-NPs was due to both the increase in ROS production and the suppression of ROS defense mechanisms. More pronounced increases in ROS, decreases in SOD activity, and decrease in expression of genes encoding Mn-SODs (sod-2 and sod-3) were detected in nematodes exposed to Al(2)O(3)-NPs compared with bulk Al(2)O(3). Moreover, treatment with antioxidants or SOD-3 overexpression not only suppressed oxidative stress but also prevented adverse effects on locomotion behaviors from Al(2)O(3)-NPs exposure. Thus, chronic exposure to Al(2)O(3)-NPs may have adverse effects on locomotion behaviors by both induction of ROS production and disruption of ROS defense mechanisms. Furthermore, sod-2 and sod-3 mutants were more susceptible than the wild-type to chronic Al(2)O(3)-NPs-induced neurotoxicity inhibition.
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Affiliation(s)
- Yinxia Li
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing, China
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Liu P, He K, Li Y, Wu Q, Yang P, Wang D. Exposure to mercury causes formation of male-specific structural deficits by inducing oxidative damage in nematodes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2012; 79:90-100. [PMID: 22209111 DOI: 10.1016/j.ecoenv.2011.12.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Revised: 12/09/2011] [Accepted: 12/10/2011] [Indexed: 05/31/2023]
Abstract
Metal exposure causes reproductive damage in hermaphrodite nematodes, but effects of metals on male development are unclear. We here investigated the effects of mercury chloride exposure on development of males. Hg exposure severely increased the percentage of abnormal males, disrupted the development of male-specific structures, and caused high reactive oxygen species (ROS) production in male tails. Pre-treatment with antioxidant (vitamin E) protected the nematodes against toxicity from Hg exposure on development of male-specific structures. The ROS production in tails was closely correlated with formation of abnormal male-specific structures in males induced by Hg exposure. Moreover, mutations of clk-1, encoding ortholog of COQ7/CAT5, and daf-2, encoding an insulin/IGF receptor, functioned in two different pathways to suppress the formation of deficits in development of male-specific structures. Thus, three different lines of evidence support our conclusion that HgCl(2) causes male structure-specific teratogenesis via production of oxidative stress.
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Affiliation(s)
- Peidang Liu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China; Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China; Institute of Neuroscience, Medical School of Southeast University, Nanjing 210009, China
| | - Kewen He
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China; Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
| | - Yinxia Li
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China; Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
| | - Qiuli Wu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China; Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
| | - Peng Yang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China; Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China; Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China.
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Wu Q, Liu P, Li Y, Du M, Xing X, Wang D. Inhibition of ROS elevation and damage to mitochondrial function prevents lead-induced neurotoxic effects on structures and functions of AFD neurons in Caenorhabditis elegans. J Environ Sci (China) 2012; 24:733-742. [PMID: 22894110 DOI: 10.1016/s1001-0742(11)60835-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Here we investigated the possible roles of oxidative stress in the formation of decreased thermotaxis to cultivation temperature in lead (Pb)-exposed nematodes Caenorhabditis elagans. Exposure to Pb at the examined concentrations decreased thermotaxis behaviors, and induced severe deficits in the structural properties of AFD sensory neurons. Meanwhile, Pb exposure caused the induction of severe oxidative damage, reactive oxygen species (ROS) production, and mitochondrial dysfunction in young adults. Moreover, pre-treatment with the antioxidants dimethyl sulfoxide (DMSO), ascorbate and N-acetyl-L-cysteine (NAC), used to inhibit both the ROS elevation and the mitochondrial dysfunction caused by Pb exposure, at the L2-larval stage prevented the induction of oxidative damage and the formation of severe deficits in thermotaxis and structural properties of AFD sensory neurons in Pb-exposed young adults. Therefore, the formation of oxidative stress caused by Pb exposure may be due to both the induction of ROS elevation and damage to mitochondrial function, and oxidative stress may play a key role in inducing the neurotoxic effects on the structures and function of AFD sensory neurons in Pb-exposed nematodes.
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Affiliation(s)
- Qiuli Wu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China.
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Wu Q, He K, Liu P, Li Y, Wang D. Association of oxidative stress with the formation of reproductive toxicity from mercury exposure on hermaphrodite nematode Caenorhabditis elegans. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2011; 32:175-184. [PMID: 21843797 DOI: 10.1016/j.etap.2011.04.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Revised: 04/10/2011] [Accepted: 04/27/2011] [Indexed: 05/31/2023]
Abstract
Here we selected HgCl(2) to investigate the mechanism of Hg toxicity on reproduction in hermaphrodite nematodes. Accompanied with decrease of brood size, Hg exposure caused severe deficits in egg number in uterus, egg laying and reproductive structures, including gonad arms and vulva, and formation of protruding phenotype for vulva. Meanwhile, Hg exposure induced severe stress response and oxidative damage in gonad and vulva. Pre-treatment with vitamin E, a potent antioxidant, at the L2-larval stage prevented the oxidative damage and formation of reproductive deficits in Hg exposed nematodes; however, pre-treatment with paraquat, a regent generating superoxide anions, induced more severe reproductive deficits in Hg exposed nematodes. Moreover, Hg exposure increased expression of clk-2 and isp-1 genes, whose mutations decrease ROS production, and decreased expression of mev-1 and gas-1 genes, whose mutations increase ROS production. Thus, oxidative stress may be essential for the induction of reproductive deficits in Hg exposed hermaphrodite nematodes.
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Affiliation(s)
- Qiuli Wu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School of Southeast University, Nanjing 210009, China
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Ye B, Rui Q, Wu Q, Wang D. Metallothioneins are required for formation of cross-adaptation response to neurobehavioral toxicity from lead and mercury exposure in nematodes. PLoS One 2010; 5:e14052. [PMID: 21124968 PMCID: PMC2987793 DOI: 10.1371/journal.pone.0014052] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Accepted: 10/22/2010] [Indexed: 11/19/2022] Open
Abstract
Metallothioneins (MTs) are small, cysteine-rich polypeptides, but the role of MTs in inducing the formation of adaptive response is still largely unknown. We investigated the roles of metallothionein genes (mtl-1 and mtl-2) in the formation of cross-adaptation response to neurobehavioral toxicity from metal exposure in Caenorhabditis elegans. Pre-treatment with mild heat-shock at L2-larva stage effectively prevented the formation of the neurobehavioral defects and the activation of severe stress response in metal exposed nematodes at concentrations of 50 and 100 µM, but pre-treatment with mild heat-shock did not prevent the formation of neurobehavioral defects in 200 µM of metal exposed nematodes. During the formation of cross-adaptation response, the induction of mtl-1 and mtl-2 promoter activity and subsequent GFP gene expression were sharply increased in 50 µM or 100 µM of metal exposed Pmtl-1::GFP and Pmtl-2::GFP transgenic adult animals after mild heat-shock treatment compared with those treated with mild heat-shock or metal exposure alone. Moreover, after pre-treatment with mild heat-shock, no noticeable increase of locomotion behaviors could be observed in metal exposed mtl-1 or mtl-2 mutant nematodes compared to those without mild heat-shock pre-treatment. The defects of adaptive response to neurobehavioral toxicity induced by metal exposure formed in mtl-1 and mtl-2 mutants could be completely rescued by the expression of mtl-1 and mtl-2 with the aid of their native promoters. Furthermore, over-expression of MTL-1 and MTL-2 at the L2-larval stage significantly suppressed the toxicity on locomotion behaviors from metal exposure at all examined concentrations. Therefore, the normal formation of cross-adaptation response to neurobehavioral toxicity induced by metal exposure may need the enough accumulation of MTs protein in animal tissues.
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Affiliation(s)
- Boping Ye
- College of Life Science and Technology, China Pharmaceutical University, Nanjing, China
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Institute of Life Sciences, Southeast University, Nanjing, China
| | - Qi Rui
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Institute of Life Sciences, Southeast University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Qiuli Wu
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Institute of Life Sciences, Southeast University, Nanjing, China
| | - Dayong Wang
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Institute of Life Sciences, Southeast University, Nanjing, China
- * E-mail:
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