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Zheng J, Wu M, Pang Y, Liu Q, Liu Y, Jin X, Tang J, Bao L, Niu Y, Zheng Y, Zhang R. Interior decorative volatile organic compounds exposure induces sleep disorders through aberrant branched chain amino acid transaminase 2 mediated glutamatergic signaling resulting from a neuroinflammatory cascade. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 934:173254. [PMID: 38761924 DOI: 10.1016/j.scitotenv.2024.173254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/16/2024] [Accepted: 05/12/2024] [Indexed: 05/20/2024]
Abstract
Air pollution has been recognized as a contributing factor to sleep disorders (SD), which have been correlated with an elevated susceptibility to a variety of human diseases. Nevertheless, research has not definitively established a connection between SD and interior decorative volatile organic compounds (ID-VOCs), a significant indoor air pollutant. In this study, we employed a mouse model exposed to ID-VOCs to explore the impacts of ID-VOCs exposure on sleep patterns and the potential underlying mechanism. Of the 23 key compositions of ID-VOCs identified, aromatic hydrocarbons were found to be the most prevalent. Exposure to ID-VOCs in mice resulted in SD, characterized by prolonged wake fullness and decreased sleep during the light period. ID-VOCs exposure triggered neuroinflammatory responses in the suprachiasmatic nucleus (SCN), with microglia activation leading to the overproduction of inflammatory cytokines such as tumor necrosis factor-α (TNF-α), interleukin-1α (IL-1α), and complement component 1q (C1q), ultimately inducing A1 astrocytes. Consequently, the upregulation of branched chain amino acid transaminase 2 (BCAT2) in A1 astrocytes resulted in elevated extracellular glutamate and disruption of the wake-sleep transition mechanism, which might be the toxicological mechanism of SD caused by ID-VOCs.
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Affiliation(s)
- Jie Zheng
- Department of Toxicology, School of Public Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China; Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei, PR China
| | - Mengqi Wu
- Department of Toxicology, School of Public Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Yaxian Pang
- Department of Toxicology, School of Public Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Qingping Liu
- Department of Toxicology, School of Public Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Yan Liu
- Department of Toxicology, School of Public Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China; School of Public Health, Inner Mongolia Medical University, Hohhot 010000, Inner Mongolia, PR China
| | - Xiaoting Jin
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao 266071, Shandong, PR China
| | - Jinglong Tang
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao 266071, Shandong, PR China
| | - Lei Bao
- Department of Occupational Health and Environmental Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Yujie Niu
- Department of Occupational Health and Environmental Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China; Hebei Key Laboratory of Environment and Human Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Yuxin Zheng
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao 266071, Shandong, PR China.
| | - Rong Zhang
- Department of Toxicology, School of Public Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China; Hebei Key Laboratory of Environment and Human Health, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China.
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Zhang M, Chen C, Sun Y, Wang Y, Du P, Ma R, Li T. Association between Ambient Volatile Organic Compounds Exposome and Emergency Hospital Admissions for Cardiovascular Disease. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:5695-5704. [PMID: 38502526 DOI: 10.1021/acs.est.3c08937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
The limited research on volatile organic compounds (VOCs) has not taken into account the interactions between constituents. We used the weighted quantile sum (WQS) model and generalized linear model (GLM) to quantify the joint effects of ambient VOCs exposome and identify the substances that play key roles. For a 0 day lag, a quartile increase of WQS index for n-alkanes, iso/anti-alkanes, aromatic, halogenated aromatic hydrocarbons, halogenated saturated chain hydrocarbons, and halogenated unsaturated chain hydrocarbons were associated with 1.09% (95% CI: 0.13, 2.06%), 0.98% (95% CI: 0.22, 1.74%), 0.92% (95% CI: 0.14, 1.69%), 1.03% (95% CI: 0.14, 1.93%), 1.69% (95% CI: 0.48, 2.91%), and 1.85% (95% CI: 0.93, 2.79%) increase in cardiovascular disease (CVD) emergency hospital admissions, respectively. Independent effects of key substances on CVD-related emergency hospital admissions were also reported. In particular, an interquartile range increase in 1,1,1-trichloroethane, methylene chloride, styrene, and methylcyclohexane is associated with a greater risk of CVD-associated emergency hospital admissions [3.30% (95% CI: 1.93, 4.69%), 3.84% (95% CI: 1.21, 6.53%), 5.62% (95% CI: 1.35, 10.06%), 8.68% (95% CI: 3.74, 13.86%), respectively]. We found that even if ambient VOCs are present at a considerably low concentration, they can cause cardiovascular damage. This should prompt governments to establish and improve concentration standards for VOCs and their sources. At the same time, policies should be introduced to limit VOCs emission to protect public health.
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Affiliation(s)
- Mengxue Zhang
- School of Public Health, Nanjing Medical University, Nanjing 211166, China
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Chen Chen
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Yue Sun
- School of Public Health, Nanjing Medical University, Nanjing 211166, China
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Yanwen Wang
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Peng Du
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Runmei Ma
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
| | - Tiantian Li
- School of Public Health, Nanjing Medical University, Nanjing 211166, China
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
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Fox JT, Ni P, Urrutia AR, Huynh HT, Worrilow KC. Modelling the equilibrium partitioning of low concentrations of airborne volatile organic compounds in human IVF laboratories. Reprod Biomed Online 2023; 46:54-68. [PMID: 36372658 DOI: 10.1016/j.rbmo.2022.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 04/29/2022] [Accepted: 05/08/2022] [Indexed: 01/31/2023]
Abstract
RESEARCH QUESTION Can volatile organic compounds (VOC) be modelled in an IVF clinical setting? DESIGN The study performed equilibrium modelling of low concentrations of airborne VOC partitioning from the air phase into the oil cover layer into the water-based culture media and into/onto the embryo (air-oil-water-embryo). The air-phase VOC were modelled based on reported VOC concentrations found in modern assisted reproductive technology (ART) suites, older IVF clinics, and hospitals, as well as at 10 parts per billion (ppb) and 100 ppb for all compounds. The modelling was performed with 23 documented healthcare-specific VOC. RESULTS Based on the partitioning model, seven compounds (acrolein, formaldehyde, phenol, toluene, acetaldehyde, ethanol and isopropanol) should be of great concern to the embryologist and clinician. Acrolein, formaldehyde, phenol, toluene and acetaldehyde are the VOC with the most potent cytotoxic factor and the highest toxic VOC concentration in media. In addition, ethanol and isopropanol are routinely found in the greatest air-phase concentrations and modelled to have the highest water-based culture concentrations. CONCLUSIONS The results of the equilibrium partitioning modelling of VOC provides a fundamental understanding of how airborne VOC partition from the air phase and negatively influence human IVF outcomes. The results presented here are based on the theoretical model and the values presented have not yet been measured in a laboratory or clinical setting. High air-phase concentrations and toxic concentrations of VOC in culture media are likely indicators of poor clinical outcomes. Based on this model, improved air quality in IVF laboratories reduces the chemical burden imparted on embryos, which supports findings of improved IVF outcomes with reduced air-phase VOC concentrations.
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Affiliation(s)
- John T Fox
- Lehigh University, 1 West Packer Avenue Bethlehem 18015, PAUSA.
| | - Pan Ni
- Lehigh University, 1 West Packer Avenue Bethlehem 18015, PAUSA
| | - Alicia R Urrutia
- LifeAire Systems, 1275 Glenlivet Drive #100, Allentown 18106, PAUSA
| | - Huey T Huynh
- LifeAire Systems, 1275 Glenlivet Drive #100, Allentown 18106, PAUSA
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Vahabi M, Ebrahimzadeh H, Zendehdel R, Jalilian N, Khodakarim S. Selective Determination of n-Hexane and Methyl Ethyl Ketone (MEK) in Urine by Magnetic-Silica Aerogel-Based Molecularly Imprinted Polymers (MIPs) with Gas Chromatography – Flame Ionization Detection (GC-FID). ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2128364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Masoomeh Vahabi
- Department of Occupational Health and Safety Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Homeira Ebrahimzadeh
- Department of Analytical Chemistry and Pollutants, Faculty of Chemistry and Petroleum Sciences, Shahid Beheshti University, Tehran, Iran
| | - Rezvan Zendehdel
- Department of Occupational Health and Safety Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Niloofar Jalilian
- Department of Analytical Chemistry and Pollutants, Faculty of Chemistry and Petroleum Sciences, Shahid Beheshti University, Tehran, Iran
| | - Soheila Khodakarim
- Department of Biostatistics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Qiu H, Chuang KJ, Fan YC, Chang TP, Bai CH, Ho KF. Acute effects of ambient non-methane hydrocarbons on cardiorespiratory hospitalizations: A multicity time-series study in Taiwan. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 234:113370. [PMID: 35255250 DOI: 10.1016/j.ecoenv.2022.113370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/26/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Few environmental epidemiological studies and no large multicity studies have evaluated the acute short-term health effects of ambient non-methane hydrocarbons (NMHC), the essential precursors of ground-level ozone and secondary organic aerosol formation. OBJECTIVE We conducted this multicity time-series study in Taiwan to evaluate the association between airborne NMHC exposure and cardiorespiratory hospital admissions. METHODS We collected the daily mean concentrations of NMHC, fine particulate matter (PM2.5), ozone (O3), weather conditions, and daily hospital admission count for cardiorespiratory diseases between 2014 and 2017 from eight major cities of Taiwan. We applied an over-dispersed generalized additive Poisson model (GAM) with adjustment for temporal trends, seasonal variations, weather conditions, and calendar effects to compute the effect estimate for each city. Then we conducted a random-effects meta-analysis to pool the eight city-specific effect estimates to obtain the overall associations of NMHC exposure on lag0 day with hospital admissions for respiratory and circulatory diseases, respectively. RESULTS On average, a 0.1-ppm increase of lag0 NMHC demonstrated an overall 0.9% (95% CI: 0.4-1.3%) and 0.8% (95% CI: 0.4-1.2%) increment of hospital admissions for respiratory and circulatory diseases, respectively. Further analyses with adjustment for PM2.5 and O3 in the multi-pollutant model or sensitivity analyses with restricting the NMHC monitoring from the general stations only confirmed the robustness of the association between ambient NMHC exposure and cardiorespiratory hospitalizations. CONCLUSION Our findings provide robust evidence of higher cardiorespiratory hospitalizations in association with acute exposure to ambient NMHC in eight major cities of Taiwan.
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Affiliation(s)
- Hong Qiu
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China; Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Hong Kong, China
| | - Kai-Jen Chuang
- Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yen-Chun Fan
- School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Ta-Pang Chang
- School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Chyi-Huey Bai
- Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan.
| | - Kin-Fai Ho
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China; Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Hong Kong, China.
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Luo J, Zhang Q, Wu L, Cao J, Feng Q, Fang F, Chen Y. Inhibition of 1, 4-dioxane on the denitrification process by altering the viability and metabolic activity of Paracoccus denitrificans. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:27274-27282. [PMID: 30032369 DOI: 10.1007/s11356-018-2642-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/24/2018] [Indexed: 06/08/2023]
Abstract
1,4-Dioxane is an emerging pollutant, which widely exists in natural environments and poses potential risks to the living organisms. However, its effect on the denitrification process is still unknown. In this study, the effects of 1,4-dioxane on the denitrification process were therefore investigated by using Paracoccus denitrificans as the model denitrifier. The obtained results showed that the exposure of 1,4-dioxane exhibited remarkable lag or inhibition on the denitrification process, especially with high dose. In the control without 1,4-dioxane exposure, Paracoccus denitrificans showed high denitrification efficiency (98.5%). However, the efficiency decreased to 78.5, 63.9, and 9.3% with 0.50, 0.75, and 1.0% (v/v) 1,4-dioxane dose, respectively. The dose-induced inhibition of denitrification by 1,4-dioxane could be partially attributed to the negative effects on proliferation and viability of functional microorganisms by conjugating and disrupting the cell membranes. Furthermore, 1,4-dioxane caused biotoxicity to the intracellular activities of denitrifiers via disturbing carbon source utilization and interfering the key enzymes responsible for glycolysis. The decrease of microbial viability and activity inevitably resulted in the decline of key enzymes (NAR, NIR, NOR, and N2OR) closely related with denitrification process, which could be the direct reason for the decrease of denitrification performance.
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Affiliation(s)
- Jingyang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China
- College of Environment, Hohai University, Nanjing, 210098, China
| | - Qin Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China
- College of Environment, Hohai University, Nanjing, 210098, China
| | - Lijuan Wu
- Jiangsu Provincial Academy of Environmental Science, Nanjing, 210098, China
| | - Jiashun Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China.
- College of Environment, Hohai University, Nanjing, 210098, China.
| | - Qian Feng
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China
- College of Environment, Hohai University, Nanjing, 210098, China
| | - Fang Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China
- College of Environment, Hohai University, Nanjing, 210098, China
| | - Yinguang Chen
- State key laboratory of pollution control and Resources reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China
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In vitro assays as a tool for determination of VOCs toxic effect on respiratory system: A critical review. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.10.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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McDermott C, Heffron JJ. Toxicity of Industrially Relevant Chlorinated Organic Solvents In Vitro. Int J Toxicol 2013; 32:136-45. [DOI: 10.1177/1091581813482006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The cytotoxic effects of 4 industrially important chlorinated organic solvents, dichloromethane (DCM), 1,2-dichloroethane (DCE), trichloroethylene (TCE), and tetrachloroethylene (PERC) in vitro, were investigated. Jurkat T cells were exposed to the solvents individually for 72 hours and changes in reactive oxygen species (ROS) formation, cell proliferation, intracellular free calcium concentration ([Ca2+]), and caspase-3 activity were measured. There was a concentration-dependent increase in the ROS formation and intracellular free [Ca2+] following exposure to each of the solvents. This was accompanied by a decrease in the cell proliferation. Solvent potency decreased in the following order: PERC > TCE > DCM > DCE. Caspase-3 activity was increased in a concentration-dependent manner by TCE and PERC but was not significantly altered by DCM or DCE. n-Acetyl-l-cysteine pretreatment showed that changes in the intracellular free [Ca2+] and caspase-3 activity were independent of ROS formation. However, increased ROS formation did play a causal role in the decreased cell proliferation observed.
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Affiliation(s)
- Catherine McDermott
- Department of Biomedical Science, Bond University, Robina, Australia
- Department of Biochemistry, Biochemical Toxicology Laboratory, University College Cork, Ireland
| | - James J.A. Heffron
- Department of Biochemistry, Biochemical Toxicology Laboratory, University College Cork, Ireland
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George S, Xia T, Rallo R, Zhao Y, Ji Z, Lin S, Wang X, Zhang H, France B, Schoenfeld D, Damoiseaux R, Liu R, Lin S, Bradley KA, Cohen Y, Nel AE. Use of a high-throughput screening approach coupled with in vivo zebrafish embryo screening to develop hazard ranking for engineered nanomaterials. ACS NANO 2011; 5:1805-17. [PMID: 21323332 PMCID: PMC3896549 DOI: 10.1021/nn102734s] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Because of concerns about the safety of a growing number of engineered nanomaterials (ENM), it is necessary to develop high-throughput screening and in silico data transformation tools that can speed up in vitro hazard ranking. Here, we report the use of a multiparametric, automated screening assay that incorporates sublethal and lethal cellular injury responses to perform high-throughput analysis of a batch of commercial metal/metal oxide nanoparticles (NP) with the inclusion of a quantum dot (QD1). The responses chosen for tracking cellular injury through automated epifluorescence microscopy included ROS production, intracellular calcium flux, mitochondrial depolarization, and plasma membrane permeability. The z-score transformed high volume data set was used to construct heat maps for in vitro hazard ranking as well as showing the similarity patterns of NPs and response parameters through the use of self-organizing maps (SOM). Among the materials analyzed, QD1 and nano-ZnO showed the most prominent lethality, while Pt, Ag, SiO2, Al2O3, and Au triggered sublethal effects but without cytotoxicity. In order to compare the in vitro with the in vivo response outcomes in zebrafish embryos, NPs were used to assess their impact on mortality rate, hatching rate, cardiac rate, and morphological defects. While QDs, ZnO, and Ag induced morphological abnormalities or interfered in embryo hatching, Pt and Ag exerted inhibitory effects on cardiac rate. Ag toxicity in zebrafish differed from the in vitro results, which is congruent with this material's designation as extremely dangerous in the environment. Interestingly, while toxicity in the initially selected QD formulation was due to a solvent (toluene), supplementary testing of additional QDs selections yielded in vitro hazard profiling that reflect the release of chalcogenides. In conclusion, the use of a high-throughput screening, in silico data handling and zebrafish testing may constitute a paradigm for rapid and integrated ENM toxicological screening.
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Affiliation(s)
- Saji George
- Department of Medicine, Division of NanoMedicine; University of California, Los Angeles, CA, USA
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
| | - Tian Xia
- Department of Medicine, Division of NanoMedicine; University of California, Los Angeles, CA, USA
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
| | - Robert Rallo
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
- Chemical and Biomolecular Engineering, University of California, Los Angeles, CA, USA
| | - Yan Zhao
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA, USA
| | - Zhaoxia Ji
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
| | - Sijie Lin
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
| | - Xiang Wang
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
| | - Haiyuan Zhang
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
| | - Bryan France
- Molecular Shared Screening Resources, University of California, Los Angeles, CA, USA
| | - David Schoenfeld
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA, USA
| | - Robert Damoiseaux
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
- Molecular Shared Screening Resources, University of California, Los Angeles, CA, USA
| | - Rong Liu
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
- Chemical and Biomolecular Engineering, University of California, Los Angeles, CA, USA
| | - Shuo Lin
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA, USA
| | - Kenneth A Bradley
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
- Department of Microbiology, Immunology and Mol Genetics, University of California, Los Angeles, CA, USA
| | - Yoram Cohen
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
- Chemical and Biomolecular Engineering, University of California, Los Angeles, CA, USA
| | - André E Nel
- Department of Medicine, Division of NanoMedicine; University of California, Los Angeles, CA, USA
- Center for Environmental Implications of Nanotechnology, California NanoSystems Institute; University of California, Los Angeles, CA, USA
- Address correspondence to
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Kim MS, Park HR, Park M, Kim SJ, Kwon M, Yu BP, Chung HY, Kim HS, Kwack SJ, Kang TS, Kim SH, Lee J. Neurotoxic effect of 2,5-hexanedione on neural progenitor cells and hippocampal neurogenesis. Toxicology 2009; 260:97-103. [DOI: 10.1016/j.tox.2009.03.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 03/16/2009] [Accepted: 03/16/2009] [Indexed: 01/14/2023]
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12
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Zou B, Wilson JG, Zhan FB, Zeng Y. Air pollution exposure assessment methods utilized in epidemiological studies. ACTA ACUST UNITED AC 2009; 11:475-90. [PMID: 19280026 DOI: 10.1039/b813889c] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The assessment of personal exposure to air pollution is a critical component of epidemiological studies associating air pollution and health effects. This paper critically reviewed 157 studies over 29 years that utilized one of five categories of exposure methods (proximity, air dispersion, hybrid, human inhalation, and biomarkers). Proximity models were found to be a questionable technique as they assume that closer proximity equates to greater exposure. Inhalation models and biomarker estimates were the most effective in assessing personal exposure, but are often cost prohibitive for large study populations. This review suggests that: (i) factors such as uncertainty, validity, data availability, and transferability related to exposure assessment methods should be considered when selecting a model; and (ii) although an entirely discreet new class of approach is not necessary, significant progress could be made through the development of a 'hybrid' model utilizing the strengths of several existing methods. Future work should systematically evaluate the performance of hybrid models compared to other individual exposure assessment methods utilizing geospatial information technologies (e.g. geographic information systems (GIS) and remote sensing (RS)) to more robustly refine estimates of ambient exposure and quantify the linkages and differences between outdoor, indoor and personal exposure estimates.
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Affiliation(s)
- Bin Zou
- Central South University, School of Info-Physics and Geomatics Engineering, Changsha, Hunan 410086, China.
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Kovacic P, Somanathan R. Integrated approach to immunotoxicity: electron transfer, reactive oxygen species, antioxidants, cell signaling, and receptors. J Recept Signal Transduct Res 2009; 28:323-46. [PMID: 18702007 DOI: 10.1080/10799890802305217] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
As with all body organs, the immune system is subjected to attack by a variety of toxins. Serious consequences can result because the immune organs serve as a defense against infective agents. The toxins, both organic and inorganic, fall into a large variety of classes, such as metals, therapeutic drugs, industrial chemicals, pollutants, pesticides, fuels, herbicides and abused drugs. Although the mode of action is multifaceted, our focus is on electron transfer (ET), reactive oxygen species (ROS), antioxidants (AOs), cell signaling, and receptors. It is significant that the toxins or their metabolites incorporate ET functionalities capable of redox cycling with resultant generation of ROS and accompanying oxidative stress.
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Affiliation(s)
- Peter Kovacic
- Department of Chemistry, San Diego State University, San Diego, CA 92182-1030, USA.
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Pariselli F, Sacco MG, Rembges D. An optimized method for in vitro exposure of human derived lung cells to volatile chemicals. ACTA ACUST UNITED AC 2008; 61:33-9. [PMID: 18650076 DOI: 10.1016/j.etp.2008.05.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Accepted: 05/29/2008] [Indexed: 11/18/2022]
Abstract
Volatile organic compounds (VOCs) such as benzene and toluene, and low molecular weight carbonyls like formaldehyde belong to the main air pollutants found in indoor environments. They are suspected to induce acute and chronic adverse health effects like asthma, allergic and cardiovascular diseases, and strongly affect well-being. Our aim was to further develop and optimize an in vitro method to study the exposure of epithelial tumour lung cells (A549) by using a commercial exposure chamber (CULTEX) to assess the biological effects of VOCs and carbonyl compounds at low concentration levels. Exposing the cells to toluene, benzene and formaldehyde at mixing ratios varying from 0.1 to 0.6ppmv in air resulted in reproducible direct effects with the induction of an inflammatory response and a modification of the glutathione redox status.
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Affiliation(s)
- F Pariselli
- Institute for Health and Consumer Protection, Ispra (VA), Italy.
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15
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n-Hexane toxicity in Jurkat T-cells is mediated by reactive oxygen species. Arch Toxicol 2008; 82:165-71. [DOI: 10.1007/s00204-008-0286-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2007] [Accepted: 01/15/2008] [Indexed: 10/22/2022]
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Fujiwara Y, Denlinger DL. High temperature and hexane break pupal diapause in the flesh fly, Sarcophaga crassipalpis, by activating ERK/MAPK. JOURNAL OF INSECT PHYSIOLOGY 2007; 53:1276-82. [PMID: 17681525 DOI: 10.1016/j.jinsphys.2007.07.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2007] [Revised: 06/26/2007] [Accepted: 07/02/2007] [Indexed: 05/16/2023]
Abstract
Pupal diapause in the flesh fly, Sarcophaga crassipalpis, can be terminated by exposure to high temperatures or, artificially, with a topical application of organic solvents. To analyze the molecular mechanisms involved in diapause termination we explored the possibility that the mitogen-activated protein kinases (MAPK) are involved in this response. Levels of phospho-ERK increased within 10 min after hexane application. Extracellular signal-regulated kinase (ERK) was also activated when pupae were transferred from 20 to 25 degrees C, thus suggesting that ERK activation is a likely component of the signal transduction pathway used to initiate development in response to diapause-terminating signals. 20-Hydroxyecdysone and cyclic GMP terminate diapause in this fly, and the juvenile hormone analog methoprene shortens the diapause, but none of these agents activated ERK. ERK was readily activated in isolated abdomens treated with hexane, thus we conclude that ERK is directly activated by the hexane treatment. ERK activation was evident in the brain, epidermis, midgut and fat body, but not in the ventral nerve mass or ring gland, thus suggesting that ERK does not act directly on the ring gland to promote ecdysteroid synthesis but exerts its effect through stimulation of the brain.
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Affiliation(s)
- Yoshihiro Fujiwara
- Department of Entomology, Ohio State University, 400 Aronoff Laboratory, 318 West 12th Avenue, Columbus, OH 43210, USA.
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McDermott C, Allshire A, van Pelt F, Heffron JJA. In vitro exposure of jurkat T-cells to industrially important organic solvents in binary combination: interaction analysis. Toxicol Sci 2007; 101:263-74. [PMID: 17982160 DOI: 10.1093/toxsci/kfm274] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Humans are frequently exposed to mixtures of environmental pollutants at low levels over prolonged periods of time yet most toxicity studies deal with acute exposure to high concentrations of single chemicals. Investigation of the biological effects and possible toxic interactions during long-term exposure to such mixtures is warranted. Here Jurkat T-cells were exposed to toluene, n-hexane and methyl ethyl ketone in binary combination. Concentration ranges were centered on thresholds at which the individual agents caused cell toxicity under otherwise similar conditions, and concentrations were confirmed by headspace gas chromatography. After 5 days cells were harvested and toxicity measured in terms of membrane damage (lactate dehydrogenase [LDH] leakage), perturbations in [Ca(2+)](i) and changes in glutathione redox status. Data for all three endpoints were subjected to isobolographic analysis to test for interaction between components of the solvent mixture. Almost all combinations of toluene and n-hexane elicited greater than additive toxicity in terms of each of the three endpoints, as did methyl ethyl ketone (MEK)/n-hexane and MEK/toluene combinations for the LDH and glutathione endpoints. The main exceptions were the two combinations involving MEK, which caused less than additive effects on perturbations of [Ca(2+)](i). It is concluded that toxicity in immune-derived T cells may exhibit greater than additive effects when there is coexposure to organic solvents. This may have implications for risk assessment of environmental exposure to these agents.
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Affiliation(s)
- Catherine McDermott
- Environmental Research Institute, University College Cork, Lee Maltings, Ireland
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