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Xiao Y, Zhang H, Li X, Han C, Liu F. DEAD-box RNA helicase DDX-23 mediates dietary restriction induced health span in Caenorhabditis elegans. GeroScience 2025; 47:153-165. [PMID: 39578298 PMCID: PMC11872819 DOI: 10.1007/s11357-024-01434-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Accepted: 11/07/2024] [Indexed: 11/24/2024] Open
Abstract
Dietary restriction (DR) extends lifespan in diverse species, from yeast to mammals. However, its underlying mechanisms are not well understood. In this study, through using the tractable model Caenorhabditis elegans, we show a role for the DEAD-box RNA helicase, DDX-23 (homologous to mammal DDX23) as a regulator of healthspan in response to dietary restriction. Meanwhile, DDX-23 is also required for heat and oxidative stress response in C. elegans. Intriguingly, DDX-23 functions in the germline during adult to regulate dietary restriction-induced longevity. We then find that PHA-4/FOXA acts downstream of DDX-23 to mediate the transcriptional response of SOD-related genes and consequently the lifespan of the animals. Furthermore, we find that the DEAD-box RNA helicase, DDX-23 negatively regulates the healthy lifespan extension by up-regulating the expression of miR-231, and resulting in suppressing the activation of FOXO transcription factor DAF-16. Our work shows a newly discovered for DEAD-box RNA helicase DDX-23 in the regulation of dietary restriction-mediated longevity in C. elegans and reveals the downstream transcriptional regulation mechanisms.
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Affiliation(s)
- Yi Xiao
- Guizhou Provincial College-Based Key Lab for Tumor Prevention and Treatment With Distinctive Medicines, Zunyi Medical University, Zunyi Guizhou, 563000, China.
- Institute of Life Sciences, Zunyi Medical University, Zunyi Guizhou, 563000, China.
- College of Basic Medicine, Zunyi Medical University, Zunyi Guizhou, 563000, China.
| | - Hongjiao Zhang
- Guizhou Provincial College-Based Key Lab for Tumor Prevention and Treatment With Distinctive Medicines, Zunyi Medical University, Zunyi Guizhou, 563000, China
- Institute of Life Sciences, Zunyi Medical University, Zunyi Guizhou, 563000, China
- College of Basic Medicine, Zunyi Medical University, Zunyi Guizhou, 563000, China
| | - Xiaocong Li
- Guizhou Provincial College-Based Key Lab for Tumor Prevention and Treatment With Distinctive Medicines, Zunyi Medical University, Zunyi Guizhou, 563000, China
- Institute of Life Sciences, Zunyi Medical University, Zunyi Guizhou, 563000, China
- College of Basic Medicine, Zunyi Medical University, Zunyi Guizhou, 563000, China
| | - Chao Han
- Guizhou Provincial College-Based Key Lab for Tumor Prevention and Treatment With Distinctive Medicines, Zunyi Medical University, Zunyi Guizhou, 563000, China
- Institute of Life Sciences, Zunyi Medical University, Zunyi Guizhou, 563000, China
- College of Basic Medicine, Zunyi Medical University, Zunyi Guizhou, 563000, China
| | - Fang Liu
- Guizhou Provincial College-Based Key Lab for Tumor Prevention and Treatment With Distinctive Medicines, Zunyi Medical University, Zunyi Guizhou, 563000, China.
- College of Basic Medicine, Zunyi Medical University, Zunyi Guizhou, 563000, China.
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2
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Analysis of Nanotoxicity with Integrated Omics and Mechanobiology. NANOMATERIALS 2021; 11:nano11092385. [PMID: 34578701 PMCID: PMC8470953 DOI: 10.3390/nano11092385] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/06/2021] [Accepted: 09/09/2021] [Indexed: 12/13/2022]
Abstract
Nanoparticles (NPs) in biomedical applications have benefits owing to their small size. However, their intricate and sensitive nature makes an evaluation of the adverse effects of NPs on health necessary and challenging. Since there are limitations to conventional toxicological methods and omics analyses provide a more comprehensive molecular profiling of multifactorial biological systems, omics approaches are necessary to evaluate nanotoxicity. Compared to a single omics layer, integrated omics across multiple omics layers provides more sensitive and comprehensive details on NP-induced toxicity based on network integration analysis. As multi-omics data are heterogeneous and massive, computational methods such as machine learning (ML) have been applied for investigating correlation among each omics. This integration of omics and ML approaches will be helpful for analyzing nanotoxicity. To that end, mechanobiology has been applied for evaluating the biophysical changes in NPs by measuring the traction force and rigidity sensing in NP-treated cells using a sub-elastomeric pillar. Therefore, integrated omics approaches are suitable for elucidating mechanobiological effects exerted by NPs. These technologies will be valuable for expanding the safety evaluations of NPs. Here, we review the integration of omics, ML, and mechanobiology for evaluating nanotoxicity.
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3
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microRNAs involved in the control of toxicity on locomotion behavior induced by simulated microgravity stress in Caenorhabditis elegans. Sci Rep 2020; 10:17510. [PMID: 33060753 PMCID: PMC7567087 DOI: 10.1038/s41598-020-74582-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/04/2020] [Indexed: 02/07/2023] Open
Abstract
microRNAs (miRNAs) post-transcriptionally regulate the expression of targeted genes. We here systematically identify miRNAs in response to simulated microgravity based on both expressions and functional analysis in Caenorhabditis elegans. After simulated microgravity treatment, we observed that 19 miRNAs (16 down-regulated and 3 up-regulated) were dysregulated. Among these dysregulated miRNAs, let-7, mir-54, mir-67, mir-85, mir-252, mir-354, mir-789, mir-2208, and mir-5592 were required for the toxicity induction of simulated microgravity in suppressing locomotion behavior. In nematodes, alteration in expressions of let-7, mir-67, mir-85, mir-252, mir-354, mir-789, mir-2208, and mir-5592 mediated a protective response to simulated microgravity, whereas alteration in mir-54 expression mediated the toxicity induction of simulated microgravity. Moreover, among these candidate miRNAs, let-7 regulated the toxicity of simulated microgravity by targeting and suppressing SKN-1/Nrf protein. In the intestine, a signaling cascade of SKN-1/Nrf-GST-4/GST-5/GST-7 required for the control of oxidative stress was identified to act downstream of let-7 to regulate the toxicity of simulated microgravity. Our data demonstrated the crucial function of miRNAs in regulating the toxicity of simulated microgravity stress in organisms. Moreover, our results further provided an important molecular basis for epigenetic control of toxicity of simulated microgravity.
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4
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Guo T, Cheng L, Zhao H, Liu Y, Yang Y, Liu J, Wu Q. The C. elegans miR-235 regulates the toxicity of graphene oxide via targeting the nuclear hormone receptor DAF-12 in the intestine. Sci Rep 2020; 10:16933. [PMID: 33037257 PMCID: PMC7547681 DOI: 10.1038/s41598-020-73712-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 09/04/2020] [Indexed: 11/09/2022] Open
Abstract
The increased application of graphene oxide (GO), a new carbon-based engineered nanomaterial, has generated a potential toxicity in humans and the environment. Previous studies have identified some dysregulated microRNAs (miRNAs), such as up-regulated mir-235, in organisms exposed to GO. However, the detailed mechanisms of the dysregulation of miRNA underlying GO toxicity are still largely elusive. In this study, we employed Caenorhabditis elegans as an in vivo model to investigate the biological function and molecular basis of mir-235 in the regulation of GO toxicity. After low concentration GO exposure, mir-235 (n4504) mutant nematodes were sensitive to GO toxicity, implying that mir-235 mediates a protection mechanism against GO toxicity. Tissue-specific assays suggested that mir-235 expressed in intestine is required for suppressing the GO toxicity in C. elegans. daf-12, a gene encoding a member of the steroid hormone receptor superfamily, acts as a target gene of mir-235 in the nematode intestine in response to GO treatment, and RNAi knockdown of daf-12 suppressed the sensitivity of mir-235(n4503) to GO toxicity. Further genetic analysis showed that DAF-12 acted in the upstream of DAF-16 in insulin/IGF-1 signaling pathway and PMK-1 in p38 MAPK signaling pathway in parallel to regulate GO toxicity. Altogether, our results revealed that mir-235 may activate a protective mechanism against GO toxicity by suppressing the DAF-12-DAF-16 and DAF-12-PMK-1 signaling cascade in nematodes, which provides an important molecular basis for the in vivo toxicity of GO at the miRNA level.
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Affiliation(s)
- Tiantian Guo
- Institute of Nephrology, Zhong Da Hospital, Medical School, Southeast University, Nanjing, China
| | - Lu Cheng
- Institute of Nephrology, Zhong Da Hospital, Medical School, Southeast University, Nanjing, China
| | - Huimin Zhao
- Institute of Nephrology, Zhong Da Hospital, Medical School, Southeast University, Nanjing, China
| | - Yingying Liu
- Institute of Nephrology, Zhong Da Hospital, Medical School, Southeast University, Nanjing, China
| | - Yunhan Yang
- Institute of Nephrology, Zhong Da Hospital, Medical School, Southeast University, Nanjing, China
| | - Jie Liu
- Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, VIC 3800, Australia
| | - Qiuli Wu
- Institute of Nephrology, Zhong Da Hospital, Medical School, Southeast University, Nanjing, China.
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5
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Yang Q, Wu J, Zhao J, Xu T, Han P, Song X. The Expression Profiles of lncRNAs and Their Regulatory Network During Smek1/2 Knockout Mouse Neural Stem Cells Differentiation. Curr Bioinform 2020. [DOI: 10.2174/1574893614666190308160507] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background:
Previous studies indicated that the cell fate of neural stem cells (NSCs)
after differentiation is determined by Smek1, one isoform of suppressor of Mek null (Smek). Smek
deficiency prevents NSCs from differentiation, thus affects the development of nervous system. In
recent years, lncRNAs have been found to participate in numerous developmental and biological
pathways. However, the effects of knocking out Smek on the expression profiles of lncRNAs
during the differentiation remain unknown.
Objective:
This study is to explore the expression profiles of lncRNAs and their possible function
during the differentiation from Smek1/2 knockout NSCs.
Methods:
We obtained NSCs from the C57BL/6J mouse fetal cerebral cortex. One group of NSCs
was from wildtype mouse (WT group), while another group was from knocked out Smek1/2 (KO
group).
Results:
By analyzing the RNA-Seq data, we found that after knocking out Smek1/2, the
expression profiles of mRNAs and lncRNAs revealed significant changes. Analyses indicated that
these affected mRNAs have connections with the pathway network for the differentiation and
proliferation of NSCs. Furthermore, we performed a co-expression network analysis on the
differentially expressed mRNAs and lncRNAs, which helped reveal the possible regulatory rules
of lncRNAs during the differentiation after knocking out Smek1/2.
Conclusion:
By comparing group WT with KO, we found 366 differentially expressed mRNAs
and 12 lncRNAs. GO and KEGG enrichment analysis on these mRNAs suggested their
relationships with differentiation and proliferation of NSCs. Some of these mRNAs and lncRNAs
have been verified to play regulatory roles in nervous system. Analyses on the co-expression
network also indicated the possible functions of affected mRNAs and lncRNAs during NSCs
differentiation after knocking out Smek1/2.
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Affiliation(s)
- Qichang Yang
- Department of Biomedical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China
| | - Jing Wu
- Department of Biomedical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China
| | - Jian Zhao
- Department of Biomedical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China
| | - Tianyi Xu
- Department of Biomedical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China
| | - Ping Han
- The First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu, 210019, China
| | - Xiaofeng Song
- Department of Biomedical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China
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6
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Qu M, Luo L, Yang Y, Kong Y, Wang D. Nanopolystyrene-induced microRNAs response in Caenorhabditis elegans after long-term and lose-dose exposure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 697:134131. [PMID: 31476495 DOI: 10.1016/j.scitotenv.2019.134131] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/01/2019] [Accepted: 08/25/2019] [Indexed: 06/10/2023]
Abstract
microRNAs (miRNAs) usually act post-transcriptionally to suppress the expression of many targeted genes. However, the response of miRNAs to nanoplastics is still unclear. We here employed Caenorhabditis elegans to investigate the response of miRNAs to 100 nm nanopolystyrene at a predicted environmental concentration (1 μg/L). After exposure from L1-larvae to adult day-3, we found that 7 miRNAs (4 down-regulated (mir-39, mir-76, mir-794, and mir-1830) and 3 up-regulated (mir-35, mir-38, and mir-354)) were dysregulated by nanopolystyrene. Expressions of these 7 miRNAs were dose-dependent in nematodes exposed to 1-100 μg/L nanopolystyrene. Among these 7 miRNAs, we found that only mir-35, mir-38, mir-76, mir-354, and mir-794 were involved in the regulation of response to nanopolystyrene based on phenotypic analysis of both transgenic strains and mutant nematodes. Overexpression of mir-35, mir-38, or mir-354 induced a resistance to nanopolystyrene toxicity, and overexpression of mir-76 or mir-794 induced a susceptibility to nanopolystyrene toxicity, which suggested that these 5 miRNAs mediated a protective response to nanopolystyrene. Gene ontology and KEGG analysis further implied that mir-35, mir-38, mir-76, mir-354, and mir-794 were associated with various biological processes and signaling pathways. Our results suggest the crucial role of a certain number of miRNAs in response to nanopolystyrene after long-term and low-dose exposure in organisms.
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Affiliation(s)
- Man Qu
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Libo Luo
- Changzhou No. 7 People's Hospital, Changzhou 213011, China
| | - Yanhua Yang
- Changzhou No. 7 People's Hospital, Changzhou 213011, China
| | - Yan Kong
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, Medical School, Southeast University, Nanjing 210009, China.
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7
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Kim M, Eom HJ, Choi I, Hong J, Choi J. Graphene oxide-induced neurotoxicity on neurotransmitters, AFD neurons and locomotive behavior in Caenorhabditis elegans. Neurotoxicology 2019; 77:30-39. [PMID: 31862286 DOI: 10.1016/j.neuro.2019.12.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 11/28/2019] [Accepted: 12/16/2019] [Indexed: 11/17/2022]
Abstract
Graphene oxide (GO) and graphene-based nanomaterials have been widely applied in recent years, but their potential health risk and neurotoxic potentials remain poorly understood. In this study, neurotoxic potential of GO and its underlying molecular and cellular mechanism were investigated using the nematode, Caenorhabditis elegans. Deposition of GO in the head region and increased reactive oxygen species (ROS) was observed in C. elegans after exposure to GO. The neurotoxic potential of GO was then investigated, focusing on neurotransmitters contents and neuronal activity using AFD sensory neurons. The contents of all neurotransmitters, such as, tyrosine, tryptophan, dopamine, tyramine, and GABA, decreased significantly by GO exposure. Decreased fluorescence of Pgcy-8:GFP, a marker of AFD sensory neuron, by GO exposure suggested GO could cause neuronal damage on AFD neuron. GO exposure led decreased expression of ttx-1 and ceh-14, genes required for the function of AFD neurons also confirmed possible detrimental effect of GO to AFD neuron. To understand physiological meaning of AFD neuronal damage by GO exposure, locomotive behavior was then investigated in wild-type as well as in loss-of-function mutants of ttx-1 and ceh-14. GO exposure significantly altered locomotor behavior markers, such as, speed, acceleration, stop time, etc., in wild-type C. elegans, which were mostly rescued in AFD neuron mutants. The present study suggested the GO possesses neurotoxic potential, especially on neurotransmitters and AFD neuron in C. elegans. These findings provide useful information to understand the neurotoxic potential of GO and other graphene-based nanomaterials, which will guide their safe application.
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Affiliation(s)
- Mina Kim
- School of Environmental Engineering, University of Seoul, 163 Siripdaero, Dongdaemun-gu, Seoul 02504, South Korea
| | - Hyun-Jeong Eom
- School of Environmental Engineering, University of Seoul, 163 Siripdaero, Dongdaemun-gu, Seoul 02504, South Korea
| | - Inhee Choi
- Department of Life Science, University of Seoul, 163 Siripdaero, Dongdaemun-gu, Seoul 02504, South Korea
| | - Jongki Hong
- College of Pharmacy, Kyung Hee University, Seoul 130-701, South Korea
| | - Jinhee Choi
- School of Environmental Engineering, University of Seoul, 163 Siripdaero, Dongdaemun-gu, Seoul 02504, South Korea.
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8
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Liu P, Shao H, Ding X, Yang R, Rui Q, Wang D. Dysregulation of Neuronal Gαo Signaling by Graphene Oxide in Nematode Caenorhabditis elegans. Sci Rep 2019; 9:6026. [PMID: 30988375 PMCID: PMC6465305 DOI: 10.1038/s41598-019-42603-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 03/28/2019] [Indexed: 12/29/2022] Open
Abstract
Exposure to graphene oxide (GO) induced some dysregulated microRNAs (miRNAs), such as the increase in mir-247, in nematode Caenorhabditis elegans. We here further identified goa-1 encoding a Gαo and pkc-1 encoding a serine/threonine protein kinase as the targets of neuronal mir-247 in the regulation of GO toxicity. GO exposure increased the expressions of both GOA-1 and PKC-1. Mutation of goa-1 or pkc-1 induced a susceptibility to GO toxicity, and suppressed the resistance of mir-247 mutant to GO toxicity. GOA-1 and PKC-1 could also act in the neurons to regulate the GO toxicity, and neuronal overexpression of mir-247 could not affect the resistance of nematodes overexpressing neuronal goa-1 or pkc-1 lacking 3'-UTR to GO toxicity. In the neurons, GOA-1 acted upstream of diacylglycerol kinase/DGK-1 and PKC-1 to regulate the GO toxicity. Moreover, DGK-1 and GOA-1 functioned synergistically in the regulation of GO toxicity. Our results highlight the crucial role of neuronal Gαo signaling in response to GO in nematodes.
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Affiliation(s)
- Peidang Liu
- Medical School, Southeast University, Nanjing, 210009, China
| | - Huimin Shao
- Medical School, Southeast University, Nanjing, 210009, China
| | - Xuecheng Ding
- Medical School, Southeast University, Nanjing, 210009, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ruilong Yang
- Medical School, Southeast University, Nanjing, 210009, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qi Rui
- College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Dayong Wang
- Medical School, Southeast University, Nanjing, 210009, China.
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9
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Shao H, Han Z, Krasteva N, Wang D. Identification of signaling cascade in the insulin signaling pathway in response to nanopolystyrene particles. Nanotoxicology 2019; 13:174-188. [DOI: 10.1080/17435390.2018.1530395] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Huimin Shao
- Medical School, Southeast University, Nanjing, China
| | - Zhongyu Han
- Medical School, Southeast University, Nanjing, China
| | - Natalia Krasteva
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Science, Sofia, Bulgaria
| | - Dayong Wang
- Medical School, Southeast University, Nanjing, China
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10
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Fadeel B, Bussy C, Merino S, Vázquez E, Flahaut E, Mouchet F, Evariste L, Gauthier L, Koivisto AJ, Vogel U, Martín C, Delogu LG, Buerki-Thurnherr T, Wick P, Beloin-Saint-Pierre D, Hischier R, Pelin M, Candotto Carniel F, Tretiach M, Cesca F, Benfenati F, Scaini D, Ballerini L, Kostarelos K, Prato M, Bianco A. Safety Assessment of Graphene-Based Materials: Focus on Human Health and the Environment. ACS NANO 2018; 12:10582-10620. [PMID: 30387986 DOI: 10.1021/acsnano.8b04758] [Citation(s) in RCA: 338] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Graphene and its derivatives are heralded as "miracle" materials with manifold applications in different sectors of society from electronics to energy storage to medicine. The increasing exploitation of graphene-based materials (GBMs) necessitates a comprehensive evaluation of the potential impact of these materials on human health and the environment. Here, we discuss synthesis and characterization of GBMs as well as human and environmental hazard assessment of GBMs using in vitro and in vivo model systems with the aim to understand the properties that underlie the biological effects of these materials; not all GBMs are alike, and it is essential that we disentangle the structure-activity relationships for this class of materials.
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Affiliation(s)
- Bengt Fadeel
- Nanosafety & Nanomedicine Laboratory, Institute of Environmental Medicine , Karolinska Institutet , 17777 Stockholm , Sweden
| | - Cyrill Bussy
- Nanomedicine Laboratory, Faculty of Biology, Medicine & Health , University of Manchester , Manchester M13 9PL , United Kingdom
| | - Sonia Merino
- Faculty of Chemical Science and Technology , University of Castilla-La Mancha , 13071 Ciudad Real , Spain
| | - Ester Vázquez
- Faculty of Chemical Science and Technology , University of Castilla-La Mancha , 13071 Ciudad Real , Spain
| | | | | | | | - Laury Gauthier
- CNRS, Université Paul Sabatier , 31062 Toulouse , France
| | - Antti J Koivisto
- National Research Centre for the Working Environment , 2100 Copenhagen , Denmark
| | - Ulla Vogel
- National Research Centre for the Working Environment , 2100 Copenhagen , Denmark
| | - Cristina Martín
- University of Strasbourg, CNRS , Immunology, Immunopathology and Therapeutic Chemistry , 67000 Strasbourg , France
| | - Lucia G Delogu
- Department of Chemistry and Pharmacy University of Sassari , Sassari 7100 , Italy
- Istituto di Ricerca Pediatrica , Fondazione Città della Speranza , 35129 Padova , Italy
| | - Tina Buerki-Thurnherr
- Swiss Federal Laboratories for Materials Science and Technology (EMPA) , 9014 St. Gallen , Switzerland
| | - Peter Wick
- Swiss Federal Laboratories for Materials Science and Technology (EMPA) , 9014 St. Gallen , Switzerland
| | | | - Roland Hischier
- Swiss Federal Laboratories for Materials Science and Technology (EMPA) , 9014 St. Gallen , Switzerland
| | - Marco Pelin
- Department of Life Sciences , University of Trieste , 34127 Trieste , Italy
| | | | - Mauro Tretiach
- Department of Life Sciences , University of Trieste , 34127 Trieste , Italy
| | - Fabrizia Cesca
- Center for Synaptic Neuroscience and Technology , Istituto Italiano di Tecnologia , 16132 Genova , Italy
| | - Fabio Benfenati
- Center for Synaptic Neuroscience and Technology , Istituto Italiano di Tecnologia , 16132 Genova , Italy
| | - Denis Scaini
- Scuola Internazionale Superiore di Studi Avanzati (SISSA) , 34136 Trieste , Italy
| | - Laura Ballerini
- Scuola Internazionale Superiore di Studi Avanzati (SISSA) , 34136 Trieste , Italy
| | - Kostas Kostarelos
- Nanomedicine Laboratory, Faculty of Biology, Medicine & Health , University of Manchester , Manchester M13 9PL , United Kingdom
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Sciences , University of Trieste , 34127 Trieste , Italy
- Carbon Nanobiotechnology Laboratory , CIC BiomaGUNE , 20009 San Sebastian , Spain
- Basque Foundation for Science, Ikerbasque , 48013 Bilbao , Spain
| | - Alberto Bianco
- University of Strasbourg, CNRS , Immunology, Immunopathology and Therapeutic Chemistry , 67000 Strasbourg , France
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11
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Ding X, Rui Q, Wang D. Functional disruption in epidermal barrier enhances toxicity and accumulation of graphene oxide. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 163:456-464. [PMID: 30075448 DOI: 10.1016/j.ecoenv.2018.07.102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 07/22/2018] [Accepted: 07/24/2018] [Indexed: 06/08/2023]
Abstract
In Caenorhabditis elegans, mutation of mlt-7 causes the deficits in epidermal barrier. Using the nematodes with epidermal-specific RNA interference (RNAi) knockdown of mlt-7 as a genetic tool, we found that epidermal-specific RNAi knockdown of mlt-7 resulted in a susceptibility to graphene oxide (GO) toxicity, and enhanced GO accumulation in the body. Epidermal-development related proteins of BLI-1 and IFB-1 acted as downstream targets of MLT-7, and mediated the function of MLT-7 in maintaining the epidermal barrier. Antimicrobial proteins of NLP-30 and CNC-2 also acted as downstream targets of MLT-7 in the regulation of GO toxicity. Epidermal-specific RNAi knockdown of nlp-30 or cnc-2 enhanced GO toxicity and accumulation in bli-1(RNAi) or ifb-1(RNAi) nematodes. Our data highlights the importance of maintaining normal epidermal barrier for nematodes against the GO toxicity.
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Affiliation(s)
- Xuecheng Ding
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, 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, Southeast University, Nanjing 210009, China.
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12
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Zhao L, Kong J, Krasteva N, Wang D. Deficit in the epidermal barrier induces toxicity and translocation of PEG modified graphene oxide in nematodes. Toxicol Res (Camb) 2018; 7:1061-1070. [PMID: 30510679 PMCID: PMC6220715 DOI: 10.1039/c8tx00136g] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/02/2018] [Indexed: 01/01/2023] Open
Abstract
The developmental basis for the epidermal barrier against the translocation of nanomaterials is still largely unclear in organisms. We here investigated the effect of deficits in the epidermal barrier on the translocation and toxicity of PEG modified graphene oxide (GO-PEG) in Caenorhabditis elegans. In wild-type or NR222 nematodes, GO-PEG exposure did not cause toxicity and affect the expression of epidermal-development related genes. However, GO-PEG exposure resulted in toxicity in mlt-7(RNAi) nematodes with deficit in the function of epidermal barrier. Epidermal RNAi knockdown of mlt-7 allowed GO-PEG accumulation and translocation into targeted organs through the epidermal barrier. Epidermal-development related proteins of BLI-1 and IFB-1 were identified as targets for MLT-7 in the regulation of GO-PEG toxicity and accounted for MLT-7 function in maintaining the epidermal barrier. AAK-2, a catalytic α subunit of AMP-activated protein kinase, was identified as another target for MLT-7 in the regulation of GO-PEG toxicity. AAK-2 functioned synergistically with BLI-1 or IFB-1 in the regulation of GO-PEG toxicity. Our data provide the molecular basis for the role of epidermal barrier against the toxicity and translocation of nanomaterials in organisms.
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Affiliation(s)
- Li Zhao
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School , Southeast University , Nanjing 210009 , China .
| | - Jingting Kong
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School , Southeast University , Nanjing 210009 , China .
| | - Natalia Krasteva
- Institute of Biophysics and Biomedical Engineering , Bulgarian Academy of Science , Sofia 1113 , Bulgaria
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School , Southeast University , Nanjing 210009 , China .
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13
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Farahani M, Rezaei-Tavirani M, Zali H, Arefi Oskouie A, Omidi M, Lashay A. Deciphering the transcription factor-microRNA-target gene regulatory network associated with graphene oxide cytotoxicity. Nanotoxicology 2018; 12:1014-1026. [PMID: 30325693 DOI: 10.1080/17435390.2018.1513090] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Graphene oxide (GO) has recently emanated as a promising material in cancer treatment. To unveil the underlying mechanisms of microRNAs (miRNAs) and potential target genes involved in GO cytotoxicity, we firstly compiled GO-related miRNAs and genes in human cancer cell lines treated with GO from public databases and published works. Besides miRNAs as post-transcriptional regulators of gene expression, transcription factors (TFs) are also the main regulators at the transcriptional level. In the following, we explored the regulatory relationships between miRNAs, target genes, and TFs. Thereafter, a gene regulatory network consisting of GO-responsive miRNAs, GO-responsive genes, and known human TFs was constructed. Then, 3-node regulatory motif types were detected in the resulting network. Among them, miRNA-FFL (feed-forward loop) was identified as a significant motif type. A total of 184 miRNA-FFLs were found and merged to generate a regulatory sub-network. Pathway analysis of the resulting sub-network highlighted adherens junction, focal adhesion, and TGFβ signaling pathways as the major pathways that previous studies demonstrate them to be the affected pathways in GO-treated cells. Functional investigations displayed that miRNAs might be involved in the control of apoptosis through disruption of cell adhesion in response to cytotoxicity. Moreover, GO-cell interactions can lead to miRNA targeting of genes (i.e. Rac1 and RhoA) involved in the cytoskeleton assembly process. These specific toxic properties support biomedical applications of GO, especially for cancer therapy.
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Affiliation(s)
- Masoumeh Farahani
- a Faculty of Paramedical Sciences , Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Mostafa Rezaei-Tavirani
- b Proteomics Research Center , Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Hakimeh Zali
- c Medical Nanotechnology and Tissue Engineering Research Center, School of Advanced Technologies in Medicine , Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Afsaneh Arefi Oskouie
- a Faculty of Paramedical Sciences , Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Meisam Omidi
- d Protein Research Center , Shahid Beheshti University , Tehran , Iran
| | - Alireza Lashay
- e Eye Research Center, Farabi Eye Hospital , Tehran University of Medical Sciences , Tehran , Iran
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14
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Dong S, Qu M, Rui Q, Wang D. Combinational effect of titanium dioxide nanoparticles and nanopolystyrene particles at environmentally relevant concentrations on nematode Caenorhabditis elegans. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 161:444-450. [PMID: 29909313 DOI: 10.1016/j.ecoenv.2018.06.021] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 06/05/2018] [Accepted: 06/09/2018] [Indexed: 05/09/2023]
Abstract
The possible adverse effects of nanoplastics have received the great attention recently; however, their effects at environmentally relevant concentration on organisms are still largely unclear. We here employed Caenorhabditis elegans to investigate the combinational effects of titanium dioxide nanoparticles (TiO2-NPs) and nanopolystyrene particles at environmentally relevant concentrations on organisms. In wild-type nematodes, prolonged exposure to nanopolystyrene particles (1 μg/L) could enhance the toxicity of TiO2-NPs (1 μg/L) in decreasing locomotion behavior and in inducing intestinal reactive oxygen species (ROS) production. Meanwhile, combinational exposure to TiO2-NPs (1 μg/L) and nanopolystyrene particles (1 μg/L) altered the molecular basis for oxidative stress in wild-type nematodes. Moreover, prolonged exposure to nanopolystyrene particles (0.1 μg/L) could further enhance the toxicity of TiO2-NPs (1 μg/L) in decreasing locomotion behavior and in inducing intestinal ROS production in sod-3 mutant nematodes. Our data suggest the potential role of nanopolystyrene particles at environmentally relevant concentrations in enhancing the toxicity of ENMs in the environment.
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Affiliation(s)
- Shuangshuang Dong
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Man Qu
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, 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, Southeast University, Nanjing 210009, China.
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15
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Biosafety assessment of water samples from Wanzhou watershed of Yangtze Three Gorges Reservior in the quiet season in Caenorhabditis elegans. Sci Rep 2018; 8:14102. [PMID: 30237459 PMCID: PMC6148280 DOI: 10.1038/s41598-018-32296-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/28/2018] [Indexed: 12/22/2022] Open
Abstract
We here employed a model animal of Caenorhabditis elegans to perform toxicity assessment of original surface water samples collected from Three Gorges Reservoir (TGR) in the quiet season in Wanzhou, Chongqing. Using some sublethal endpoints, including lifespan, body length, locomotion behavior, brood size, and intestinal reactive oxygen species (ROS) induction, we found that the examined five original surface water samples could not cause toxicity on wild-type nematodes. Nevertheless, the surface water sample collected from backwater area induced the significant increase in expressions of genes (sod-2 and sod-3) encoding Mn-SODs in wild-type nematodes. Among the examined five original surface water samples, exposure to the original surface water sample collected from backwater area could further cause the toxicity in decreasing locomotion behavior and in inducing intestinal ROS production in sod-3 mutant nematodes. Moreover, the solid phase of surface water sample collected from backwater area might mainly contribute to the observed toxicity in sod-3 mutant nematodes. Our results are helpful for understanding the potential effects of surface water in the TGR region in the quiet season on environmental organisms.
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16
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Xiao G, Zhao L, Huang Q, Yang J, Du H, Guo D, Xia M, Li G, Chen Z, Wang D. Toxicity evaluation of Wanzhou watershed of Yangtze Three Gorges Reservior in the flood season in Caenorhabditis elegans. Sci Rep 2018; 8:6734. [PMID: 29712953 PMCID: PMC5928115 DOI: 10.1038/s41598-018-25048-w] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 04/12/2018] [Indexed: 01/08/2023] Open
Abstract
Three Gorges Reservoir (TGR) in the upper stream of Yangtze River in China is a reservoir with the largest and the longest yearly water-level drop. Considering the fact that most of safety assessments of water samples collected from TGR region were based on chemical analysis, we here employed Caenorhabditis elegans to perform in vivo safety assessment of original surface water samples collected from TGR region in the flood season in Wanzhou, Chongqing. Among the examined five original surface water samples, only exposure to original surface water sample collected from backwater area could induce the significant intestinal ROS production, enhance the intestinal permeability, and decrease the locomotion behavior. Additionally, exposure to original surface water sample collected from backwater area altered the expressions of sod-2, sod-5, clk-1, and mev-1. Moreover, mutation of sod-2 or sod-5 was susceptible to the potential toxicity of original surface water sample collected from backwater area on nematodes. Together, our results imply that exposure to surface water sample from the backwater area may at least cause the adverse effects on intestinal function and locomotion behavior in nematodes.
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Affiliation(s)
- Guosheng Xiao
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - Li Zhao
- Medical School, Southeast University, Nanjing, 210009, China
| | - Qian Huang
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - Junnian Yang
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - Huihui Du
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - Dongqin Guo
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - Mingxing Xia
- Wanzhou Entry-Exit Inspection and Quarantine Bureau, Wanzhou, 404100, China
| | - Guangman Li
- Wanzhou Entry-Exit Inspection and Quarantine Bureau, Wanzhou, 404100, China
| | - Zongxiang Chen
- Wanzhou Entry-Exit Inspection and Quarantine Bureau, Wanzhou, 404100, China
| | - Dayong Wang
- Medical School, Southeast University, Nanjing, 210009, China.
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17
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Xiao G, Chen H, Krasteva N, Liu Q, Wang D. Identification of interneurons required for the aversive response of Caenorhabditis elegans to graphene oxide. J Nanobiotechnology 2018; 16:45. [PMID: 29703212 PMCID: PMC5921546 DOI: 10.1186/s12951-018-0373-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 04/23/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND So far, how the animals evade the environmental nanomaterials is still largely unclear. In this study, we employed in vivo assay system of Caenorhabditis elegans to investigate the aversive behavior of nematodes to graphene oxide (GO) and the underlying neuronal basis. RESULTS In this assay model, we detected the significant aversive behavior of nematodes to GO at concentrations more than 50 mg/L. Loss-of-function mutation of nlg-1 encoding a neuroligin with the function in connecting pre- and post-synaptic neurons suppressed the aversive behavior of nematodes to GO. Moreover, based on the neuron-specific activity assay, we found that the NLG-1 activity in AIY or AIB interneurons was required for the regulation of aversive behavior to GO. The neuron-specific activities of NLG-1 in AIY or AIB interneurons were also required for the regulation of GO toxicity. CONCLUSIONS Using nlg-1 mutant as a genetic tool, we identified the AIY and AIB interneurons required for the regulation of aversive behavior to GO. Our results provide an important neuronal basis for the aversive response of animals to environmental nanomaterials.
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Affiliation(s)
- Guosheng Xiao
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - He Chen
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, 210009, China
| | - Natalia Krasteva
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Science, Sofia, 1113, Bulgaria
| | - Qizhan Liu
- School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, 210009, China.
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Abstract
MicroRNAs (miRNAs) are ∼22 nt RNAs that direct posttranscriptional repression of mRNA targets in diverse eukaryotic lineages. In humans and other mammals, these small RNAs help sculpt the expression of most mRNAs. This article reviews advances in our understanding of the defining features of metazoan miRNAs and their biogenesis, genomics, and evolution. It then reviews how metazoan miRNAs are regulated, how they recognize and cause repression of their targets, and the biological functions of this repression, with a compilation of knockout phenotypes that shows that important biological functions have been identified for most of the broadly conserved miRNAs of mammals.
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Affiliation(s)
- David P Bartel
- Howard Hughes Medical Institute and Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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19
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Zhao L, Wan H, Liu Q, Wang D. Multi-walled carbon nanotubes-induced alterations in microRNA let-7 and its targets activate a protection mechanism by conferring a developmental timing control. Part Fibre Toxicol 2017; 14:27. [PMID: 28728598 PMCID: PMC5520286 DOI: 10.1186/s12989-017-0208-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 07/14/2017] [Indexed: 12/14/2022] Open
Affiliation(s)
- Li Zhao
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, 210009, China
| | - Hanxiao Wan
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, 210009, China
| | - Qizhan Liu
- School of Public Health, Nanjing Medical University, Nanjing, 211166, China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, 210009, China.
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Ren M, Zhao L, Lv X, Wang D. Antimicrobial proteins in the response to graphene oxide in Caenorhabditis elegans. Nanotoxicology 2017; 11:578-590. [DOI: 10.1080/17435390.2017.1329954] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mingxia Ren
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, China
| | - Li Zhao
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, China
| | - Xiao Lv
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing, China
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21
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Qu M, Li Y, Wu Q, Xia Y, Wang D. Neuronal ERK signaling in response to graphene oxide in nematode Caenorhabditis elegans. Nanotoxicology 2017; 11:520-533. [PMID: 28368775 DOI: 10.1080/17435390.2017.1315190] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 03/26/2017] [Accepted: 03/30/2017] [Indexed: 12/28/2022]
Abstract
ERK signaling is one of the important mitogen-activated protein kinases (MAPKs). However, the role of ERK signaling in the regulation of response to engineered nanomaterial exposure is still largely unclear. In this study, using in vivo assay system of Caenorhabditis elegans, we investigated the function of ERK signaling in response to graphene oxide (GO) exposure and the underlying molecular mechanism. GO exposure increased the expression of MEK-2/MEK and MPK-1/ERK in the ERK signaling pathway. Mutation of mek-2 or mpk-1 resulted in a susceptibility to GO toxicity. Both the MEK-2 and the MPK-1 acted in neurons to regulate the response to GO exposure, and the neuronal expression of MEK-2 or MPK-1 caused a resistance to GO toxicity. In the neurons, SKN-1b/Nrf acted downstream of the MPK-1, and AEX-3, a guanine exchange factor for GTPase, further acted downstream of the SKN-1b to regulate the response to GO exposure. Therefore, a signaling cascade of MEK-2-MPK-1-SKN-1b/-AEX-3 was identified in the neurons required for the regulation of response to GO exposure. Moreover, genetic interaction assay demonstrated that the neuronal ERK signaling-mediated signaling pathway and the intestinal p38 MAPK-mediated signaling pathway functioned synergistically in the regulation of response to GO exposure. Our results highlight the crucial function of the neuronal ERK signaling in the regulation of response to nanomaterial exposure in organisms.
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Affiliation(s)
- Man Qu
- a Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School, Southeast University , Nanjing , China
- b School of Public Health , Southeast University , Nanjing , China
| | - Yunhui Li
- b School of Public Health , Southeast University , Nanjing , China
| | - Qiuli Wu
- a Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School, Southeast University , Nanjing , China
| | - Yankai Xia
- c State Key Laboratory of Reproductive Medicine , Institute of Toxicology, Nanjing Medical University , Nanjing , China
| | - Dayong Wang
- a Key Laboratory of Environmental Medicine Engineering in Ministry of Education , Medical School, Southeast University , Nanjing , China
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Li P, Xu T, Wu S, Lei L, He D. Chronic exposure to graphene-based nanomaterials induces behavioral deficits and neural damage in Caenorhabditis elegans. J Appl Toxicol 2017; 37:1140-1150. [PMID: 28418071 DOI: 10.1002/jat.3468] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 02/05/2017] [Accepted: 02/20/2017] [Indexed: 12/12/2022]
Abstract
Nanomaterials of graphene and its derivatives have been widely applied in recent years, but whose impacts on the environment and health are still not well understood. In the present study, the potential adverse effects of graphite (G), graphite oxide nanoplatelets (GO) and graphene quantum dots (GQDs) on the motor nervous system were investigated using nematode Caenorhabditis elegans as the assay system. After being characterized using TEM, SEM, XPS and PLE, three nanomaterials were chronically exposed to C. elegans for 6 days. In total, 50-100 mg l-1 GO caused a significant reduction in the survival rate, but G and GDDs showed low lethality on nematodes. After chronic exposure of sub-lethal dosages, three nanomaterials were observed to distribute primarily in the pharynx and intestine; but GQDs were widespread in nematode body. Three graphene-based nanomaterials resulted in significant declines in locomotor frequency of body bending, head thrashing and pharynx pumping. In addition, mean speed, bending angle-frequency and wavelength of the crawling movement were significantly reduced after exposure. Using transgenic nematodes, we found high concentrations of graphene-based nanomaterials induced down-expression of dat-1::GFP and eat-4::GFP, but no significant changes in unc-47::GFP. This indicates that graphene-based nanomaterials can lead to damages in the dopaminergic and glutamatergic neurons. The present data suggest that chronic exposure of graphene-based nanomaterials may cause neurotoxicity risks of inducing behavioral deficits and neural damage. These findings provide useful information to understand the toxicity and safe application of graphene-based nanomaterials. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Ping Li
- Lab of Toxicology, School of Ecological and Environmental Sciences, East China Normal University, 500# DongChuan RD, Shanghai, 200241, China.,Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, 200241, China
| | - Tiantian Xu
- Lab of Toxicology, School of Ecological and Environmental Sciences, East China Normal University, 500# DongChuan RD, Shanghai, 200241, China.,Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, 200241, China
| | - Siyu Wu
- Lab of Toxicology, School of Ecological and Environmental Sciences, East China Normal University, 500# DongChuan RD, Shanghai, 200241, China
| | - Lili Lei
- Lab of Toxicology, School of Ecological and Environmental Sciences, East China Normal University, 500# DongChuan RD, Shanghai, 200241, China
| | - Defu He
- Lab of Toxicology, School of Ecological and Environmental Sciences, East China Normal University, 500# DongChuan RD, Shanghai, 200241, China.,Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, 200241, China
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Chen H, Li H, Wang D. Graphene Oxide Dysregulates Neuroligin/NLG-1-Mediated Molecular Signaling in Interneurons in Caenorhabditis elegans. Sci Rep 2017; 7:41655. [PMID: 28128356 PMCID: PMC5269675 DOI: 10.1038/srep41655] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 12/22/2016] [Indexed: 12/03/2022] Open
Abstract
Graphene oxide (GO) can be potentially used in many medical and industrial fields. Using assay system of Caenorhabditis elegans, we identified the NLG-1/Neuroligin-mediated neuronal signaling dysregulated by GO exposure. In nematodes, GO exposure significantly decreased the expression of NLG-1, a postsynaptic cell adhesion protein. Loss-of-function mutation of nlg-1 gene resulted in a susceptible property of nematodes to GO toxicity. Rescue experiments suggested that NLG-1 could act in AIY interneurons to regulate the response to GO exposure. In the AIY interneurons, PKC-1, a serine/threonine protein kinase C (PKC) protein, was identified as the downstream target for NLG-1 in the regulation of response to GO exposure. LIN-45, a Raf protein in ERK signaling pathway, was further identified as the downstream target for PKC-1 in the regulation of response to GO exposure. Therefore, GO may dysregulate NLG-1-mediated molecular signaling in the interneurons, and a neuronal signaling cascade of NLG-1-PKC-1-LIN-45 was raised to be required for the control of response to GO exposure. More importantly, intestinal RNAi knockdown of daf-16 gene encoding a FOXO transcriptional factor in insulin signaling pathway suppressed the resistant property of nematodes overexpressing NLG-1 to GO toxicity, suggesting the possible link between neuronal NLG-1 signaling and intestinal insulin signaling in the regulation of response to GO exposure.
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Affiliation(s)
- He Chen
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Huirong Li
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
| | - Dayong Wang
- Key Laboratory of Environmental Medicine Engineering in Ministry of Education, Medical School, Southeast University, Nanjing 210009, China
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