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Liu S, Junaid M, Wang C, Wang J. Eco-corona enhanced the interactive effects of nanoplastics and 6:2 chlorinated polyfluorinated ether sulfonate in zebrafish embryos. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 953:176223. [PMID: 39270866 DOI: 10.1016/j.scitotenv.2024.176223] [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: 08/02/2024] [Revised: 08/30/2024] [Accepted: 09/10/2024] [Indexed: 09/15/2024]
Abstract
Nanoplastics (NPs, < 1000 nm) interact with chemicals and biomolecules to produce chemical-/eco-corona, altering the environmental destiny, bioavailability, and toxicity of plastic particles and co-occurring chemicals. This study employs exogenous (humic acid, HA) and endogenous (bovine serum albumin, BSA) natural organic matter (NOM) to investigate the eco-corona formation on NPs and explore the interfacial effects of eco-corona and 6:2 chlorinated polyfluorinated ether sulfonate (Cl-PFESA, commonly named as F-53B) on zebrafish (Danio rerio) after 7 days of exposure. Our results indicated significant changes in growth and developmental indices of zebrafish embryos among all eco-corona groups (p < 0.05). Additionally, NFB (BSA-corona, 1 mg/L NPs + 200 μg/L F-53B + 10 mg/L BSA), NFH (HA-corona, 1 mg/L NPs + 200 μg/L F-53B + 10 mg/L HA) and NFHB (BSA-HA-corona, 1 mg/L NPs + 200 μg/L F-53B + 10 mg/L BSA + 10 mg/L HA) showed elevated bioaccumulation of NPs, ROS generation and induction of apoptosis. Transcriptomic analysis showed the number of differentially expressed genes (DEGs) in the following order: BSA-HA-corona (NFHB (2953) > HA-corona (NFH (2797) > NH (2721) > F-53B (2292) > NF (2033) > BSA-corona (NFB (687) > NB (450)), and no DEGs were detected in the single NP compared to the control. Further, the PI3K-AKT, immune system, endocrine system, digestive system, infectious diseases, and neurovegetative disease pathways showed sensitive responses in the NFH/NFHB groups compared to those in the NFB group. Therefore, the interactive effects of NPs and F-53B on zebrafish embryos were lower in the presence of BSA-corona than those in HA- or HA-BSA-coronas, indicating a relationship between the formation of diverse eco-coronas on NPs by multiple NOM and an associated increase in the interfacial toxicological effects of plastic particles and F-35B in freshwater organisms.
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Affiliation(s)
- Shulin Liu
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510641, China
| | - Muhammad Junaid
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510641, China; Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, Shaoguan 512005, China
| | - Chong Wang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510641, China
| | - Jun Wang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510641, China.
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2
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Grasse N, Massei R, Seiwert B, Scholz S, Escher BI, Reemtsma T, Fu Q. Impact of Biotransformation on Internal Concentrations and Specificity Classification of Organic Chemicals in the Zebrafish Embryo ( Danio rerio). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:17898-17907. [PMID: 39315645 PMCID: PMC11465767 DOI: 10.1021/acs.est.4c04156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 09/06/2024] [Accepted: 09/09/2024] [Indexed: 09/25/2024]
Abstract
Internal concentrations (ICs) are crucial for linking exposure to effects in the development of New Approach Methodologies. ICs of chemicals in aquatic organisms are primarily driven by hydrophobicity and modulated by biotransformation and efflux. Comparing the predicted baseline to observed toxicity enables the estimation of effect specificity, but biological processes can lead to overestimating ICs and bias the specificity assessment. To evaluate the prediction of a mass balance model (MBM) and the impact of biotransformation on ICs, experimental ICs of 63 chemicals in zebrafish embryos were compared to predictions with physicochemical properties as input parameters. Experimental ICs of 79% (50 of 63) of the chemicals deviated less than 10-fold from predictions, and the remaining 13 deviated up to a factor of 90. Using experimental ICs changed the classification for 19 chemicals, with ICs 5 to 90 times lower than predicted, showing the bias of specificity classification. Uptake kinetics of pirinixic acid, genistein, dexamethasone, ethoprophos, atorvastatin, and niflumic acid were studied over a 96 h exposure period, and transformation products (TPs) were elucidated using suspect- and nontarget screening with UPLC-HRMS. 35 TPs (5 to 8 TPs per compound) were tentatively identified and semiquantified based on peak areas, suggesting that biotransformation may partly account for the overpredictions of ICs.
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Affiliation(s)
- Nico Grasse
- Department
of Environmental Analytical Chemistry, Helmholtz-Centre
for Environmental Research - UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Riccardo Massei
- Department
of Ecotoxicology, Helmholtz-Centre for Environmental
Research - UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Bettina Seiwert
- Department
of Environmental Analytical Chemistry, Helmholtz-Centre
for Environmental Research - UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Stefan Scholz
- Department
of Ecotoxicology, Helmholtz-Centre for Environmental
Research - UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Beate I. Escher
- Department
of Cell Toxicology, Helmholtz-Centre for
Environmental Research - UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
- Environmental
Toxicology, Department of Geosciences, Eberhard
Karls University Tübingen, Schnarrenbergstr. 94-96, DE-72076 Tübingen, Germany
| | - Thorsten Reemtsma
- Department
of Environmental Analytical Chemistry, Helmholtz-Centre
for Environmental Research - UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
- Institute
for Analytical Chemistry, University of
Leipzig, Linnestrasse
3, 04103 Leipzig, Germany
| | - Qiuguo Fu
- Department
of Environmental Analytical Chemistry, Helmholtz-Centre
for Environmental Research - UFZ, Permoserstrasse 15, 04318 Leipzig, Germany
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3
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Zhao Y, Wang M, Chu W. Neurotoxicity and intestinal microbiota dysbiosis induced by per- and polyfluoroalkyl substances in crucian carp (Carassius auratus). JOURNAL OF HAZARDOUS MATERIALS 2024; 478:135611. [PMID: 39173387 DOI: 10.1016/j.jhazmat.2024.135611] [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: 06/27/2024] [Revised: 08/17/2024] [Accepted: 08/20/2024] [Indexed: 08/24/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) have been called "forever chemicals" due to their inherent chemical stability. Their potential toxic effects on aquatic animals and health risk assessments have not been fully elucidated. In this study, we investigated the toxic effects of PFASs at environmentally relevant concentrations (200 ng/L) on crucian carp (Carassius auratus). The results showed that PFAS reduced the comfort behaviour of crucian carp and was associated with reduced levels of acetylcholinesterase and dopamine in the brain. PFAS exposure also decreased the activities of total superoxide dismutase, catalase and glutathione peroxidase, while increasing the levels of malondialdehyde. PFAS caused over-expression of the pro-inflammatory cytokines TNF-α, IFN-γ and stress-related genes Caspase-3, HSP-70 in the fish brain. Pathological staining showed that PFAS caused multifocal demyelination and perineural vacuolization in brain, intestinal tissue also showed reduced villus length and focal damage. PFASs altered the composition of the gut microbiota of crucian carp, significantly increasing the abundance of potentially pathogenic bacteria and the potential pathogenicity of the microbiota. It is suggested that PFASs may cause varying degrees of tissue damage by destabilising the gut microbiota. These results provide insights for assessing the toxicity of PFAS contaminants at aquatic environmental concentrations.
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Affiliation(s)
- Yang Zhao
- Department of Microbiology and Synthetic Biology, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China
| | - Minyu Wang
- Department of Microbiology and Synthetic Biology, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China
| | - Weihua Chu
- Department of Microbiology and Synthetic Biology, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China.
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4
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Jiang JY, How CM, Huang CW, Luo YS, Wei CC. Comparing the obesogenic effect and regulatory mechanisms of long-term exposure to per/polyfluoroalkyl substances with different terminal groups in Caenorhabditis elegans. CHEMOSPHERE 2024; 365:143396. [PMID: 39313077 DOI: 10.1016/j.chemosphere.2024.143396] [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: 07/10/2024] [Revised: 09/02/2024] [Accepted: 09/21/2024] [Indexed: 09/25/2024]
Abstract
Per/polyfluoroalkyl substances (PFASs) are ubiquitous, bioaccumulative, and recalcitrant contaminants, posing global exposure and health risks. The effects of chemical structures on toxicities and the mechanisms of their obesogenic effects were largely unclear. This study used the model organism Caenorhabditis elegans to assess the impact of long-term exposure to different PFASs (PFNA, PFOSA, PFBS, PFHxS, 6:2 FTS, 4:2 FTS, PFOA, and PFOS) on growth and lipid metabolism and discussed the obesogenic mechanisms of selected PFASs. The growth assays indicated longer carbon-fluorine (-CF) chains and total fluorine atoms increased developmental toxicity of PFASs, while at 8 -CF chain-length, PFNA (-COOH terminal), PFOS (-SO3 terminal), and PFOSA (-SO2NH2 terminal) exhibited differential growth inhibition. With the toxicity ranking of PFNA > PFOS > PFOSA, all PFASs significantly induced total lipid accumulation and perturbed the lipid composition in C. elegans. All three PFASs significantly induced lipogenesis gene expression and partially suppressed lipolysis genes. The results suggested that the disruption of lipid metabolism of PFOSA depends on sbp-1, while PFNA and PFOS depend on nhr-49. In conclusion, long-term exposure to PFNA, PFOSA, and PFOS triggers obesogenic effects in organisms by distinct molecular mechanisms.
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Affiliation(s)
- Jia-Yu Jiang
- Institute of Food Safety and Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei, 100, Taiwan
| | - Chun Ming How
- Institute of Food Safety and Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei, 100, Taiwan
| | - Chi-Wei Huang
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 811, Taiwan
| | - Yu-Syuan Luo
- Institute of Food Safety and Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei, 100, Taiwan; Master of Public Health Program, College of Public Health, National Taiwan University, Taipei, 100, Taiwan
| | - Chia-Cheng Wei
- Institute of Food Safety and Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei, 100, Taiwan; Department of Public Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei, 100, Taiwan.
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5
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Lu C, Lv Y, Meng X, Yang T, Liu Y, Kou G, Yang X, Luo J. The potential toxic effects of estrogen exposure on neural and vascular development in zebrafish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 283:116862. [PMID: 39128450 DOI: 10.1016/j.ecoenv.2024.116862] [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: 04/18/2024] [Revised: 08/01/2024] [Accepted: 08/08/2024] [Indexed: 08/13/2024]
Abstract
Estrogens and estrogenic chemicals are endocrine-disrupting chemicals (EDCs). The potential toxicity of EDCs to humans and aquatic organisms has become increasingly concerning. However, at present, the potential toxic mechanisms of EDCs on neural and vascular development are still being fully investigated. During the study, we utilized zebrafish to assess the developmental neural and vascular toxicity of different estrogens. The results indicated that zebrafish treated with different estrogens, especially E2, exhibit developmental malformations, including increased mortality, decreased body length, decreased heart rate, aberrant swimming behavior, and increased developmental malformations, including spinal curvature (SC), yolk edema (YE) and pericaidial edema (PE), in a dose-dependent manner with 72 h-treated. Further morphological evaluation revealed that E2 exposure significantly induced motor neural abnormalities in zebrafish embryos. In addition, treated with these three estrogens also impaired the vascular development in the early stage of zebrafish embryos. Mechanistically, the identification of downstream factors revealed that several key neural and vascular development-related genes, including syn2a, gfap, gap43, shha, kdr, flt1 and flt4, were transcriptionally downregulated after estrogen exposure in zebrafish, suggesting that estrogen exposure might cause neural and vascular toxicity by interfering the mRNA levels of genes relevant to neural and vascular development.
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Affiliation(s)
- Chunjiao Lu
- Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou 515041, China
| | - Yuhang Lv
- Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou 515041, China
| | - Xin Meng
- Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou 515041, China
| | - Ting Yang
- Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou 515041, China
| | - Yi Liu
- Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou 515041, China
| | - Guanhua Kou
- Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou 515041, China
| | - Xiaojun Yang
- Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou 515041, China; Department of Neurosurgery, The First Affiliated Hospital of Shantou University Medical College, Shantou, China.
| | - Juanjuan Luo
- Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou 515041, China.
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6
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Nawaji T, Mizoguchi N, Adachi R, Teraoka H. Toxicokinetics of a developmental toxicity test in zebrafish embryos and larvae: Relationship with drug exposure in humans and other mammals. Curr Res Toxicol 2024; 7:100187. [PMID: 39104612 PMCID: PMC11298605 DOI: 10.1016/j.crtox.2024.100187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 07/03/2024] [Accepted: 07/11/2024] [Indexed: 08/07/2024] Open
Abstract
To study the effects of drugs on embryo/fetal development (EFD), developmental and reproductive toxicity studies in zebrafish (Danio rerio) embryos is expected to be an accepted alternative method to animal studies using mammals. However, there is a lack of clarity in the relationship between the concentration of developmental toxicity agents in whole embryos or larvae (Ce) and that in aqueous solution (Cw), and also between the amount of drug exposure required to cause developmental toxicity in zebrafish embryos or larvae and that required in mammals. Here, we measured Ce for developmental toxicity agents every 24 h starting at 24 h post fertilization (hpf). We found a high correlation (R 2: 0.87-0.96) between log [Ce/Cw] and the n-octanol-water distribution coefficient at pH 7 (logD) of each drug at all time points up to 120 hpf. We used this relationship to estimate the Ce values of the 21 positive-control reference drugs listed in ICH guidelines on reproductive and developmental toxicity studies (ICH S5). We then calculated the area under the Ce-time curve in zebrafish (zAUC) for each drug from the regression equation between log [Ce/Cw] and logD and compared it with the AUC at the no-observed-adverse-effect level in rats and rabbits and at the effective dose in humans described in ICH S5. The log of the calculated zAUC for the 14 drugs identified as positive in the zebrafish developmental toxicity test was relatively highly positively correlated with the log [AUC] for rats, rabbits, and humans. These findings provide important and positive information on the applicability of the zebrafish embryo developmental toxicity test as an alternative method of EFD testing. (267 words).
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Affiliation(s)
- Tasuku Nawaji
- Chemicals Evaluation and Research Institute, Japan (CERI), 3-2-7 Miyanojin, Kurume, Fukuoka 839-0801, Japan
| | - Naohiro Mizoguchi
- Chemicals Evaluation and Research Institute, Japan (CERI), 3-2-7 Miyanojin, Kurume, Fukuoka 839-0801, Japan
| | - Ryuta Adachi
- Chemicals Evaluation and Research Institute, Japan (CERI), 3-2-7 Miyanojin, Kurume, Fukuoka 839-0801, Japan
| | - Hiroki Teraoka
- School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan
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7
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Burcham LE, Hoskins TD, Allmon EB, Scherer MN, Bushong AG, Hamilton MT, Macheri S, Coogan GS, Choi YJ, Lee LS, Sepúlveda MS. Does salinity mediate the toxicity of perfluorooctanesulfonic acid (PFOS) in an estuarine fish? MARINE POLLUTION BULLETIN 2024; 203:116446. [PMID: 38703627 DOI: 10.1016/j.marpolbul.2024.116446] [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: 01/24/2024] [Revised: 04/28/2024] [Accepted: 04/29/2024] [Indexed: 05/06/2024]
Abstract
Perfluorooctanesulfonic acid (PFOS) is detected in estuarine environments, where salinity levels fluctuate regularly. We investigated the effects of salinity on the toxicity of PFOS in embryos and larvae of Cyprinodon variegatus. We crossed six PFOS treatments (0, 1-10,000 μg/L) with two salinities (10, 30 ppt). Larvae exposed to the highest concentration of PFOS under high salinity accumulated over twice the amount of PFOS compared to larvae maintained under low salinity. Embryonic survival was unaffected by PFOS, salinity, or their interaction. PFOS delayed time to hatch and increased salinity reduced time to hatch regardless of PFOS treatment; however, no salinity by PFOS interactions were observed. Conversely, PFOS and salinity interacted in the larval stage, with decreased survival at 30 ppt salinity. This is one of the first studies evaluating interactive effects of PFOS and high salinity and highlights the importance of assessing PFAS toxicity across life stages.
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Affiliation(s)
- Lucy E Burcham
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Tyler D Hoskins
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Elizabeth B Allmon
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Meredith N Scherer
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Anna G Bushong
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Matthew T Hamilton
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Sini Macheri
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Grace S Coogan
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Youn J Choi
- Department of Agronomy, Purdue University, West Lafayette, IN 47907, USA
| | - Linda S Lee
- Department of Agronomy, Purdue University, West Lafayette, IN 47907, USA
| | - Maria S Sepúlveda
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47907, USA; Sustainability Research Center and PhD in Conservation Medicine, Life Sciences Faculty, Universidad Andres Bello, Santiago, Chile.
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8
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Hamed M, Vats A, Lim IE, Sapkota B, Abdelmoneim A. Effects of developmental exposure to individual and combined PFAS on development and behavioral stress responses in larval zebrafish. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 349:123912. [PMID: 38570156 DOI: 10.1016/j.envpol.2024.123912] [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: 01/31/2024] [Revised: 03/29/2024] [Accepted: 03/31/2024] [Indexed: 04/05/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are a class of synthetic chemicals known for their widespread use and persistence in the environment. Laboratory and epidemiological studies investigating these compounds have signaled their neurotoxic and endocrine-disrupting propensities, prompting further research into their effects on behavioral stress responses and their potential role as risk factors for stress-related disorders such as anxiety and depression. This study elucidates the ramifications of early developmental exposures to individual and combined PFAS on the development and behavioral stress responses of larval zebrafish (Danio rerio), an established model in toxicological research. Wild-type zebrafish embryos were enzymatically dechorionated and exposed to PFOS, PFOA, PFHxS, and PFHxA between 6 and 120 h post-fertilization (hpf). We targeted environmentally relevant concentrations stemming from the USEPA 2016 Hazard Advisory Limit (HAL, 0.07 μg/L) and folds higher (0.35, 0.7, 1.75, and 3.5 μg/L). Evaluations at 120 hpf encompassed mortality, overall development, developmental defects, and larval activity both at baseline stress levels and following exposure to acute stressors (acoustic and visual). Larval exposure to PFOA, PFOS, or PFHxS (0.07 μg/L or higher) elicited significant increases in mortality rates, which capped at 23.1%. Exposure to individual chemicals resulted in limited effects on overall development but increased the prevalence of developmental defects in the body axis, swim bladder, pigmentation, and eyes, as well as the prevalence of yolk sac and pericardial edemas. Larval activity at baseline stress levels and following exposure to acute stimuli was significantly altered. Combined exposure to all four chemicals intensified the breadth of developmental and behavioral alterations, suggesting possible additive or synergistic effects. Our findings shed light on the developmental and neurobehavioral disturbances associated with developmental exposure to PFAS at environmentally relevant concentrations, the added risks of combined exposures to these chemicals, and their possible role as environmental risk factors for stress-related disorders.
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Affiliation(s)
- Mohamed Hamed
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Ajn Vats
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Ignitius Ezekiel Lim
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Biplov Sapkota
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Ahmed Abdelmoneim
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, 70803, USA.
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9
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Adeogun AO, Chukwuka AV, Ibor OR, Asimakopoulos AG, Zhang J, Arukwe A. Occurrence, bioaccumulation and trophic dynamics of per- and polyfluoroalkyl substances in two tropical freshwater lakes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 346:123575. [PMID: 38365077 DOI: 10.1016/j.envpol.2024.123575] [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: 12/18/2023] [Revised: 02/04/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
We have investigated the occurrence, distribution, and biomagnification of per- and polyfluoroalkyl substances (PFAS) in two tropical lakes (Asejire and Eleyele) of Southwestern Nigeria, with contrasting urban intensities. Over an 8-month period, we sampled sediment and fish species (Clarias gariepinus: CIG; Oreochromis niloticus: ON; Coptodon guineensis: CG; Sarotherodon melanotheron: SM) across trophic levels, and analyzed various PFAS congeners, in addition to a select group of toxicological responses. While herbivores (SM) and benthic omnivores (CIG) at Asejire exhibited elevated levels of PFBS and PFOS, the pelagic omnivores (ON) showed a dominance of PFOS, PFDA, PFHxDA and EtFOSE in the muscle. At the Eleyele urban lake, PFAS patterns was dominated by PFBS, EtFOSE, PFPeS, PFOcDA and PFOS in the herbivores (SM, CG), EtFOSE, PFOS and PFBS in the pelagic omnivore (ON) and benthic omnivore (ClG). The estimated biomagnification factor (BMF) analysis for both lakes indicated trophic level increase of PFOS, PFUnA and PFDA at the suburban lake, while PFOS and EtFOSE biomagnified at the urban lake. We detected the occurrence of diSAMPAP and 9CL-PF3ONS, novel compounds not commonly reported, in PFAS studies at both lakes. The studied toxicological responses varied across trophic groups in both lakes with probable modulations by environmental conditions, trophic structure, and relative PFAS exposures in the lakes. The present study documents, for the first time in Nigeria, or any other African country, the role of urbanization on contaminant load into the environment and their implications for contaminant dynamics within the ecosystem and for aquatic food safety.
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Affiliation(s)
- Aina O Adeogun
- Department of Zoology, University of Ibadan, Ibadan, Nigeria
| | - Azubuike V Chukwuka
- National Environmental Standards and Regulations Enforcement Agency (NESREA), Nigeria
| | - Oju R Ibor
- Department of Zoology and Environmental Biology, University of Calabar, Calabar, Nigeria
| | | | - Junjie Zhang
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Augustine Arukwe
- Department of Biology, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
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10
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Yang Q, Tian L, Wang W, Chen X, Tao J. Post-fertilization 2-ethylhexyl-4-methoxycinnamate (EHMC) exposure affects axonal growth, muscle fiber length, and motor behavior in zebrafish embryos. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 272:116053. [PMID: 38306815 DOI: 10.1016/j.ecoenv.2024.116053] [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: 08/16/2023] [Revised: 01/26/2024] [Accepted: 01/28/2024] [Indexed: 02/04/2024]
Abstract
Organic UV filters, which are often found in the environment, have been the focus of much public health concern. 2-ethylhexyl-4-methoxycinnamate (EHMC) is one of the most common organic UV filters present in the environment. However, few studies have investigated its developmental neurotoxic (DNT) effects and the underlying molecular mechanisms. In the present study, zebrafish embryos were exposed to low concentration of EHMC (0, 0.01, 0.1, 1 mg/L) in static water starting from 6 h post-fertilization (hpf). Results showed that EHMC exposure caused a reduction in somite count at 13 hpf, a diminishment in head-trunk angle at 30 hpf, a delay in hatching at 48 hpf, and a decrease in head depth and head length at both 30 and 48 hpf. Additionally, EHMC led to abnormal motor behaviors at various developmental stages including altered spontaneous movement at both 23 and 24 hpf, and decreased touch response at 30 hpf. Consistent with these morphological changes and motor behavior deficits, EHMC inhibited axonal growth of primary motor neurons at 30 and 48 hpf, and yielded subtle changes in muscle fiber length at 48 hpf, suggesting the functional relevance of structural changes. Moreover, EHMC exposure induced excessive cell apoptosis in the head and spinal cord regions, increased the production of reactive oxygen species (ROS) and malondialdehyde (MDA), and reduced the level of glutathione (GSH). Defects of lateral line system neuromasts were also observed, but no structural deformity of blood vessels was seen in developing zebrafish. Abnormal expression of axonal growth-related genes (gap43, mbp, shha, and α1-tubulin) and apoptosis-related genes (bax/bcl-2 and caspase-3) revealed potential molecular mechanisms regarding the defective motor behaviors and aberrant phenotype. In summary, our findings indicate that EHMC induced developmental neurotoxicity in zebrafish, making it essential to assess its risks and provide warnings regarding EHMC exposure.
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Affiliation(s)
- Qinyuan Yang
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, No.6 Ankang Road, Guian New Area, Guizhou 561113, China
| | - Linxuan Tian
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, No.6 Ankang Road, Guian New Area, Guizhou 561113, China
| | - Weiwei Wang
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, No.6 Ankang Road, Guian New Area, Guizhou 561113, China
| | - Xiong Chen
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, No.6 Ankang Road, Guian New Area, Guizhou 561113, China
| | - Junyan Tao
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, No.6 Ankang Road, Guian New Area, Guizhou 561113, China.
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11
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Albers J, Mylroie J, Kimble A, Steward C, Chapman K, Wilbanks M, Perkins E, Garcia-Reyero N. Per- and Polyfluoroalkyl Substances: Impacts on Morphology, Behavior and Lipid Levels in Zebrafish Embryos. TOXICS 2024; 12:192. [PMID: 38535925 PMCID: PMC10975676 DOI: 10.3390/toxics12030192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 04/01/2024]
Abstract
The presence of per- and polyfluoroalkyl substances (PFASs) in aquatic environments is often persistent and widespread. Understanding the potential adverse effects from this group of chemicals on aquatic communities allows for better hazard characterization. This study examines impacts on zebrafish (Danio rerio) embryo physiology, behavior, and lipid levels from exposure to perfluorooctanoic acid (PFOA), perfluorohexane sulfonate (PFHxS), and heptadecafluorooctanesulfonic acid (PFOS). Embryos were exposed to lethal and sublethal levels of each chemical and monitored for alterations in physiological malformations, mortality, lipid levels, and behavior (only PFOA and PFHxS). The predicted 50% lethal concentrations for 120 hpf embryos were 528.6 ppm PFOA, 14.28 ppm PFHxS, and 2.14 ppm PFOS. Spine curvature and the inability of the 120 hpf embryos to maintain a dorsal-up orientation was significantly increased at 10.2 ppm PFHxS and 1.9 ppm PFOS exposure. All measured 120 hpf embryo behaviors were significantly altered starting at the lowest levels tested, 188 ppm PFOA and 6.4 ppm PFHxS. Lipid levels decreased at the highest PFAS levels tested (375 PFOA ppm, 14.4 PFHxS ppm, 2.42 ppm PFOS). In general, the PFAS chemicals, at the levels examined in this study, increased morphological deformities, embryo activity, and startle response time, as well as decreased lipid levels in 120 hpf zebrafish embryos.
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Affiliation(s)
- Janice Albers
- Oak Ridge Institute for Science and Education, Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS 39180, USA
| | - John Mylroie
- Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS 39180, USA (N.G.-R.)
| | - Ashley Kimble
- Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS 39180, USA (N.G.-R.)
| | | | - Kacy Chapman
- Oak Ridge Institute for Science and Education, Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS 39180, USA
| | - Mitchell Wilbanks
- Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS 39180, USA (N.G.-R.)
| | - Edward Perkins
- Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS 39180, USA (N.G.-R.)
| | - Natàlia Garcia-Reyero
- Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS 39180, USA (N.G.-R.)
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12
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Annunziato M, Bashirova N, Eeza MNH, Lawson A, Fernandez-Lima F, Tose LV, Matysik J, Alia A, Berry JP. An Integrated Metabolomics-Based Model, and Identification of Potential Biomarkers, of Perfluorooctane Sulfonic Acid Toxicity in Zebrafish Embryos. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024. [PMID: 38411227 DOI: 10.1002/etc.5824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/28/2023] [Accepted: 01/08/2024] [Indexed: 02/28/2024]
Abstract
Known for their high stability and surfactant properties, per- and polyfluoroalkyl substances (PFAS) have been widely used in a range of manufactured products. Despite being largely phased out due to concerns regarding their persistence, bioaccumulation, and toxicity, legacy PFAS such as perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid continue to persist at high levels in the environment, posing risks to aquatic organisms. We used high-resolution magic angle spinning nuclear magnetic resonance spectroscopy in intact zebrafish (Danio rerio) embryos to investigate the metabolic pathways altered by PFOS both before and after hatching (i.e., 24 and 72 h post fertilization [hpf], respectively). Assessment of embryotoxicity found embryo lethality in the parts-per-million range with no significant difference in mortality between the 24- and 72-hpf exposure groups. Metabolic profiling revealed mostly consistent changes between the two exposure groups, with altered metabolites generally associated with oxidative stress, lipid metabolism, energy production, and mitochondrial function, as well as specific targeting of the liver and central nervous system as key systems. These metabolic changes were further supported by analyses of tissue-specific production of reactive oxygen species, as well as nontargeted mass spectrometric lipid profiling. Our findings suggest that PFOS-induced metabolic changes in zebrafish embryos may be mediated through previously described interactions with regulatory and transcription factors leading to disruption of mitochondrial function and energy metabolism. The present study proposes a systems-level model of PFOS toxicity in early life stages of zebrafish, and also identifies potential biomarkers of effect and exposure for improved environmental biomonitoring. Environ Toxicol Chem 2024;00:1-19. © 2024 SETAC.
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Affiliation(s)
- Mark Annunziato
- Institute of Environment, Florida International University, Miami, Florida, USA
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, USA
- Biomolecular Science Institute, Florida International University, Miami, Florida, USA
| | - Narmin Bashirova
- Institute for Analytical Chemistry, University of Leipzig, Leipzig, Germany
| | - Muhamed N H Eeza
- Institute for Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany
| | - Ariel Lawson
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, USA
| | - Francisco Fernandez-Lima
- Institute of Environment, Florida International University, Miami, Florida, USA
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, USA
- Biomolecular Science Institute, Florida International University, Miami, Florida, USA
| | - Lilian V Tose
- Institute of Environment, Florida International University, Miami, Florida, USA
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, USA
- Biomolecular Science Institute, Florida International University, Miami, Florida, USA
| | - Jörg Matysik
- Institute for Analytical Chemistry, University of Leipzig, Leipzig, Germany
| | - A Alia
- Institute for Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany
- Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - John P Berry
- Institute of Environment, Florida International University, Miami, Florida, USA
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, USA
- Biomolecular Science Institute, Florida International University, Miami, Florida, USA
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13
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Nolen RM, Prouse A, Russell ML, Bloodgood J, Díaz Clark C, Carmichael RH, Petersen LH, Kaiser K, Hala D, Quigg A. Evaluation of fatty acids and carnitine as biomarkers of PFOS exposure in biota (fish and dolphin) from Galveston Bay and the northwestern Gulf of Mexico. Comp Biochem Physiol C Toxicol Pharmacol 2024; 276:109817. [PMID: 38101762 DOI: 10.1016/j.cbpc.2023.109817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 11/10/2023] [Accepted: 12/07/2023] [Indexed: 12/17/2023]
Abstract
Perfluorooctane sulfonate (PFOS) is a ubiquitous pollutant that elicits a wide range of toxic effects in exposed biota. Coastal zones in highly urbanized or industrial areas are particularly vulnerable to PFOS pollution. At present, information is lacking on biomarkers to assess PFOS effects on aquatic wildlife. This study investigated the efficacy of l-carnitine (or carnitine) and fatty acids as biomarkers of PFOS exposure in aquatic biota. The levels of PFOS, total and free carnitine, and 24 fatty acids (measured as fatty acid methyl esters or FAMEs) were measured in the liver, and muscle or blubber, of fish and dolphins sampled from Galveston Bay and the northern Gulf of Mexico (nGoM). Overall, bottlenose dolphins (Tursiops truncatus) had the highest hepatic PFOS levels. Galveston Bay fish, gafftopsail catfish (Bagre marinus), red drum (Sciaenops ocellatus), and spotted seatrout (Cynoscion nebulosus), had hepatic PFOS levels ∼8-13× higher than nGoM pelagic fish species, red snapper (Lutjanus campechanus) and yellowfin tuna (Thunnus albacares). The multivariate analysis of PFOS liver body-burdens and biomarkers found carnitine to be a more modal biomarker of PFOS exposure than FAMEs. Significant positive correlation of hepatic PFOS levels with total carnitine was evident for biota from Galveston Bay (fish only), and a significant correlation between PFOS and total and free carnitine was evident for biota from the nGoM (fish and dolphins). Given the essential role of carnitine in mediating fatty acid β-oxidation, our results suggest carnitine to be a likely candidate biomarker of environmental PFOS exposure and indicative of potential dyslipidemia effects.
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Affiliation(s)
- Rayna M Nolen
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX 77553, USA.
| | - Alexandra Prouse
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX 77553, USA
| | - Mackenzie L Russell
- University Programs, Dauphin Island Sea Lab, 101 Bienville Blvd, Dauphin Island, AL 36528, USA
| | - Jennifer Bloodgood
- University Programs, Dauphin Island Sea Lab, 101 Bienville Blvd, Dauphin Island, AL 36528, USA; Stokes School of Marine and Environmental Sciences, University of South Alabama, 307 N University Blvd, Mobile, AL 36688, USA; Cornell Wildlife Health Lab, Cornell University College of Veterinary Medicine, 240 Farrier Rd, Ithaca, NY 14853, USA
| | - Cristina Díaz Clark
- University Programs, Dauphin Island Sea Lab, 101 Bienville Blvd, Dauphin Island, AL 36528, USA
| | - Ruth H Carmichael
- University Programs, Dauphin Island Sea Lab, 101 Bienville Blvd, Dauphin Island, AL 36528, USA; Stokes School of Marine and Environmental Sciences, University of South Alabama, 307 N University Blvd, Mobile, AL 36688, USA
| | - Lene H Petersen
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX 77553, USA
| | - Karl Kaiser
- Department of Marine and Coastal Environmental Science, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX 77553, USA; Department of Oceanography, Texas A&M University, 3146 TAMU, College Station, TX 77843, USA
| | - David Hala
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX 77553, USA
| | - Antonietta Quigg
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX 77553, USA; Department of Oceanography, Texas A&M University, 3146 TAMU, College Station, TX 77843, USA; Department of Ecology and Conservation Biology, Texas A&M University, 3146 TAMU, College Station, TX 77843, USA
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14
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Ismail T, Lee HK, Lee H, Kim Y, Kim E, Lee JY, Kim KB, Ryu HY, Cho DH, Kwon TK, Park TJ, Kwon T, Lee HS. Early life exposure to perfluorooctanesulfonate (PFOS) impacts vital biological processes in Xenopus laevis: Integrated morphometric and transcriptomic analyses. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 269:115820. [PMID: 38103469 DOI: 10.1016/j.ecoenv.2023.115820] [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: 08/25/2023] [Revised: 12/07/2023] [Accepted: 12/09/2023] [Indexed: 12/19/2023]
Abstract
Perfluorooctanesulfonate (PFOS) is a ubiquitous environmental pollutant associated with increasing health concerns and environmental hazards. Toxicological analyses of PFOS exposure are hampered by large interspecies variations and limited studies on the mechanistic details of PFOS-induced toxicity. We investigated the effects of PFOS exposure on Xenopus laevis embryos based on the reported developmental effects in zebrafish. X. laevis was selected to further our understanding of interspecies variation in response to PFOS, and we built upon previous studies by including transcriptomics and an assessment of ciliogenic effects. Midblastula-stage X. laevis embryos were exposed to PFOS using the frog embryo teratogenesis assay Xenopus (FETAX). Results showed teratogenic effects of PFOS in a time- and dose-dependent manner. The morphological abnormalities of skeleton deformities, a small head, and a miscoiled gut were associated with changes in gene expression evidenced by whole-mount in situ hybridization and transcriptomics. The transcriptomic profile of PFOS-exposed embryos indicated the perturbation in the expression of genes associated with cell death, and downregulation in adenosine triphosphate (ATP) biosynthesis. Moreover, we observed the effects of PFOS exposure on cilia development as a reduction in the number of multiciliated cells and changes in the directionality and velocity of the cilia-driven flow. Collectively, these data broaden the molecular understanding of PFOS-induced developmental effects, whereby ciliary dysfunction and disrupted ATP synthesis are implicated as the probable modes of action of embryotoxicity. Furthermore, our findings present a new challenge to understand the links between PFOS-induced developmental toxicity and vital biological processes.
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Affiliation(s)
- Tayaba Ismail
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hyun-Kyung Lee
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hongchan Lee
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Youni Kim
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Eunjeong Kim
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jun-Yeong Lee
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Kee-Beom Kim
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hong-Yeoul Ryu
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Dong-Hyung Cho
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Taeg Kyu Kwon
- Department of Immunology, School of Medicine, Keimyung University, Daegu 42601, Republic of Korea
| | - Tae Joo Park
- Department of Biological Sciences, College of Information-Bio Convergence, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Taejoon Kwon
- Department of Biomedical Engineering, College of Information-Bio Convergence, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Hyun-Shik Lee
- KNU LAMP Research Center, KNU, Institute of Basic Sciences, BK21 FOUR KNU Creative BioResearch Group, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.
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15
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Zoodsma JD, Boonkanon C, Running L, Basharat R, Atilla-Gokcumen GE, Aga DS, Sirotkin HI. Perfluorooctane Sulfonate (PFOS) Negatively Impacts Prey Capture Capabilities in Larval Zebrafish. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2023. [PMID: 38153236 DOI: 10.1002/etc.5819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 12/05/2023] [Accepted: 12/22/2023] [Indexed: 12/29/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are widely used in many industrial and domestic applications, which has resulted in unintentional human exposures and bioaccumulation in blood and other organs. Perfluorooctane sulfonate (PFOS) is among the most prevalent PFAS in the environment and has been postulated to affect brain functions in exposed organisms. However, the impacts of PFOS in early neural development have not been well described. We used zebrafish larvae to assess the effects of PFOS on two fundamental complex behaviors, prey capture and learning. Zebrafish exposed to PFOS concentrations ranging from 2 to 20 µM for differing 48-h periods were viable through early larval stages. In addition, PFOS uptake was unaffected by the presence of a chorion. We employed two different experimental paradigms; first we assessed the impacts of increasing organismal PFOS bioaccumulation on prey capture and learning, and second, we probed stage-specific sensitivity to PFOS by exposing zebrafish at different developmental stages (0-2 vs. 3-5 days post fertilization). Following both assays we measured the amount of PFOS present in each larva and found that PFOS levels varied in larvae from different groups within each experimental paradigm. Significant negative correlations were observed between larval PFOS accumulation and percentage of captured prey, whereas nonsignificant negative correlations were observed between PFOS accumulation and experienced-induced prey capture learning. These findings suggest that PFOS accumulation negatively affects larval zebrafish's ability to perform complicated multisensory behaviors and highlights the potential risks of PFOS exposure to animals in the wild, with implications for human health. Environ Toxicol Chem 2024;00:1-9. © 2023 SETAC.
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Affiliation(s)
- Josiah D Zoodsma
- Graduate Program in Neuroscience, Stony Brook University, Stony Brook, New York, USA
- Department of Neurobiology & Behavior, Stony Brook University, Stony Brook, New York, USA
| | - Chanita Boonkanon
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York, USA
- Integrated Science and Technology Research Center, Faculty of Technology and Environment, Prince of Songkla University, Phuket Campus, Phuket, Thailand
| | - Logan Running
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Rehman Basharat
- Department of Neurobiology & Behavior, Stony Brook University, Stony Brook, New York, USA
| | - G Ekin Atilla-Gokcumen
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Diana S Aga
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Howard I Sirotkin
- Department of Neurobiology & Behavior, Stony Brook University, Stony Brook, New York, USA
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16
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Ma DD, Shi WJ, Li SY, Zhang JG, Lu ZJ, Long XB, Liu X, Huang CS, Ying GG. Ephedrine and cocaine cause developmental neurotoxicity and abnormal behavior in zebrafish. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 265:106765. [PMID: 37979497 DOI: 10.1016/j.aquatox.2023.106765] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/08/2023] [Accepted: 11/10/2023] [Indexed: 11/20/2023]
Abstract
Ephedrine (EPH) and cocaine (COC) are illegal stimulant drugs, and have been frequently detected in aquatic environments. EPH and COC have negative effects on the nervous system and cause abnormal behaviors in mammals and fish at high concentrations, but their mechanisms of neurotoxicity remain unclear in larvae fish at low concentrations. To address this issue, zebrafish embryos were exposed to EPH and COC for 14 days post-fertilization (dpf) at 10, 100, and 1000 ng L-1. The bioaccumulation, development, behavior, cell neurotransmitter levels and apoptosis were detected to investigate the developmental neurotoxicity (DNT) of EPH and COC. The results showed that EPH decreased heart rate, while COC increased heart rate. EPH caused cell apoptosis in the brain by AO staining. In addition, behavior analysis indicated that EPH and COC affected spontaneous movement, touch-response, swimming activity and anxiety-like behaviors. EPH and COC altered the levels of the neurotransmitters dopamine (DA) and γ-aminobutyric acid (GABA) with changes of the transcription of genes related to the DA and GABA pathways. These findings indicated that EPH and COC had noticeable DNT in the early stage of zebrafish at environmentally relevant concentrations.
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Affiliation(s)
- Dong-Dong Ma
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China
| | - Wen-Jun Shi
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China; Anti-Drug Technology Center of Guangdong Province and National Anti-Drug Laboratory Guangdong Regional Center, Guangdong Provincial Key Laboratory of Psychoactive Substances Monitoring and Safety, Guangzhou 510230, China.
| | - Si-Ying Li
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China
| | - Jin-Ge Zhang
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China
| | - Zhi-Jie Lu
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China
| | - Xiao-Bing Long
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China
| | - Xin Liu
- Anti-Drug Technology Center of Guangdong Province and National Anti-Drug Laboratory Guangdong Regional Center, Guangdong Provincial Key Laboratory of Psychoactive Substances Monitoring and Safety, Guangzhou 510230, China
| | - Chu-Shu Huang
- Anti-Drug Technology Center of Guangdong Province and National Anti-Drug Laboratory Guangdong Regional Center, Guangdong Provincial Key Laboratory of Psychoactive Substances Monitoring and Safety, Guangzhou 510230, China
| | - Guang-Guo Ying
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China; Anti-Drug Technology Center of Guangdong Province and National Anti-Drug Laboratory Guangdong Regional Center, Guangdong Provincial Key Laboratory of Psychoactive Substances Monitoring and Safety, Guangzhou 510230, China.
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17
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Wu M, Zheng N, Zhan X, He J, Xiao M, Zuo Z, He C. Icariin induces developmental toxicity via thyroid hormone disruption in zebrafish larvae. Food Chem Toxicol 2023; 182:114155. [PMID: 37898232 DOI: 10.1016/j.fct.2023.114155] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/23/2023] [Accepted: 10/25/2023] [Indexed: 10/30/2023]
Abstract
Icariin (ICA) is a natural flavonoid isolated from the traditional Chinese medicinal herb, Epimedium brevicornu Maxim. Although previous studies have reported that ICA exhibits various pharmacological activities, little is known about its toxicology. Herein, zebrafish embryos were exposed to ICA at 0, 2.5, 10, and 40 μM. In developmental analysis, reduced hatching rates, decreased body length, and abnormal swim bladder were found after treatment with 10 and 40 μM ICA. In addition, the ability of locomotor behavior was impaired by ICA. Two important thyroid hormones (THs), triiodothyronine (T3) and thyroxine (T4), were tested. The exposure resulted in a remarkable alteration of T4 level and a significant decrease of the T3/T4 ratio in the 40 μM, indicating thyroid endocrine disruption. Furthermore, gene transcription analysis showed that genes involved in thyroid development (nkx2.1) and THs synthesis (tg) were up-regulated after ICA exposure. Significant down-regulation of iodothyronine deiodinase (dio1) was also observed in the 10 and 40 μM groups compared to the control. Taken together, our study first demonstrated that ICA caused developmental toxicity possibly through disrupting thyroid development and hormone synthesis. These results show that it is necessary to perform risk assessments of ICA in clinical practice.
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Affiliation(s)
- Meifang Wu
- Fujian Institute of Subtropical Botany / Fujian Key Laboratory of Physiology and Biochemistry for Subtropical Plant, Xiamen, Fujian, 361006, China
| | - Naying Zheng
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, China
| | - Xiaoxiao Zhan
- Fujian Institute of Subtropical Botany / Fujian Key Laboratory of Physiology and Biochemistry for Subtropical Plant, Xiamen, Fujian, 361006, China
| | - Jianzhang He
- Fujian Institute of Subtropical Botany / Fujian Key Laboratory of Physiology and Biochemistry for Subtropical Plant, Xiamen, Fujian, 361006, China
| | - Min Xiao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, China
| | - Zhenghong Zuo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, China
| | - Chengyong He
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361102, China.
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18
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Wang Y, Yin N, Yang R, Zhao M, Li S, Zhang S, Zhao Y, Faiola F. Development of a simplified human embryonic stem cell-based retinal pre-organoid model for toxicity evaluations of common pollutants. Cutan Ocul Toxicol 2023; 42:264-272. [PMID: 37602871 DOI: 10.1080/15569527.2023.2249988] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 06/20/2023] [Accepted: 08/14/2023] [Indexed: 08/22/2023]
Abstract
OBJECTIVE To explore the retinal toxicity of pharmaceuticals and personal care products (PPCPs), flame retardants, bisphenols, phthalates, and polycyclic aromatic hydrocarbons (PAHs) on human retinal progenitor cells (RPCs) and retinal pigment epithelial (RPE) cells, which are the primary cell types at the early stages of retinal development, vital for subsequent functional cell type differentiation, and closely related to retinal diseases. MATERIALS AND METHODS After 23 days of differentiation, human embryonic stem cell (hESC)-based retinal pre-organoids, containing RPCs and RPE cells, were exposed to 10, 100, and 1000 nM pesticides (butachlor, terbutryn, imidacloprid, deltamethrin, pendimethalin, and carbaryl), flame retardants (PFOS, TBBPA, DBDPE, and TDCIPP), PPCPs (climbazole and BHT), and other typical pollutants (phenanthrene, DCHP, and BPA) for seven days. Then, mRNA expression changes were monitored and compared. RESULTS (1) The selected pollutants did not show strong effects at environmental and human-relevant concentrations, although the effects of flame retardants were more potent than those of other categories of chemicals. Surprisingly, some pollutants with distinct structures showed similar adverse effects. (2) Exposure to pollutants induced different degrees of cell detachment, probably due to alterations in extracellular matrix and/or cell adhesion. CONCLUSIONS In this study, we established a retinal pre-organoid model suitable for evaluating multiple pollutants' effects, and pointed out the potential retinal toxicity of flame retardants, among other pollutants. Nevertheless, the potential mechanisms of toxicity and the effects on cell detachment are still unclear and deserve further exploration. Additionally, this model holds promise for screening interventions aimed at mitigating the detrimental effects of these pollutants.
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Affiliation(s)
- Yue Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Nuoya Yin
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Renjun Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Miaomiao Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Shichang Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Shuxian Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Yanyi Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Francesco Faiola
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, P.R. China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, P.R. China
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19
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Dong G, Wang N, Xu T, Liang J, Qiao R, Yin D, Lin S. Deep Learning-Enabled Morphometric Analysis for Toxicity Screening Using Zebrafish Larvae. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:18127-18138. [PMID: 36971266 DOI: 10.1021/acs.est.3c00593] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Toxicology studies heavily rely on morphometric analysis to detect abnormalities and diagnose disease processes. The emergence of ever-increasing varieties of environmental pollutants makes it difficult to perform timely assessments, especially using in vivo models. Herein, we propose a deep learning-based morphometric analysis (DLMA) to quantitatively identify eight abnormal phenotypes (head hemorrhage, jaw malformation, uninflated swim bladder, pericardial edema, yolk edema, bent spine, dead, unhatched) and eight vital organ features (eye, head, jaw, heart, yolk, swim bladder, body length, and curvature) of zebrafish larvae. A data set composed of 2532 bright-field micrographs of zebrafish larvae at 120 h post fertilization was generated from toxicity screening of three categories of chemicals, i.e., endocrine disruptors (perfluorooctanesulfonate and bisphenol A), heavy metals (CdCl2 and PbI2), and emerging organic pollutants (acetaminophen, 2,7-dibromocarbazole, 3-monobromocarbazo, 3,6-dibromocarbazole, and 1,3,6,8-tetrabromocarbazo). Two typical deep learning models, one-stage and two-stage models (TensorMask, Mask R-CNN), were trained to implement phenotypic feature classification and segmentation. The accuracy was statistically validated with a mean average precision >0.93 in unlabeled data sets and a mean accuracy >0.86 in previously published data sets. Such a method effectively enables subjective morphometric analysis of zebrafish larvae to achieve efficient hazard identification of both chemicals and environmental pollutants.
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Affiliation(s)
- Gongqing Dong
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, Tongji University, Shanghai 200092, China
- Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China
| | - Nan Wang
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, Tongji University, Shanghai 200092, China
- Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China
| | - Ting Xu
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, Tongji University, Shanghai 200092, China
- Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China
| | - Jingyu Liang
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, Tongji University, Shanghai 200092, China
- Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China
| | - Ruxia Qiao
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, Tongji University, Shanghai 200092, China
- Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China
| | - Daqiang Yin
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, Tongji University, Shanghai 200092, China
- Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China
| | - Sijie Lin
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, Tongji University, Shanghai 200092, China
- Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China
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20
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Paquette SE, Martin NR, Rodd A, Manz KE, Allen E, Camarillo M, Weller HI, Pennell K, Plavicki JS. Evaluation of Neural Regulation and Microglial Responses to Brain Injury in Larval Zebrafish Exposed to Perfluorooctane Sulfonate. ENVIRONMENTAL HEALTH PERSPECTIVES 2023; 131:117008. [PMID: 37966802 PMCID: PMC10650473 DOI: 10.1289/ehp12861] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 10/06/2023] [Accepted: 10/16/2023] [Indexed: 11/16/2023]
Abstract
BACKGROUND Per- and polyfluoroalkyl substances (PFAS) are biopersistent, global pollutants. Although some in vitro and epidemiological studies have explored the neurotoxic potential of perfluorooctane sulfonate (PFOS), a prevalent PFAS congener, it is unknown how developmental PFOS exposure affects neuronal signaling, microglia development, and microglial-neuron communication. OBJECTIVES We sought to determine the extent to which PFOS exposure disrupts brain health, neuronal activity, and microglia-neuron communication during development. In addition, although PFOS impairs humoral immunity, its impact on innate immune cells, including resident microglia, is unclear. As such, we investigated whether microglia are cellular targets of PFOS, and, if so, whether disrupted microglial development or function could contribute to or is influenced by PFOS-induced neural dysfunction. METHODS Zebrafish were chronically exposed to either a control solution [0.1% dimethyl sulfoxide (DMSO)], 7 μ M PFOS, 14 μ M PFOS, 28 μ M PFOS, or 64 μ M perfluorooctanoic acid (PFOA). We used in vivo imaging and gene expression analysis to assess microglial populations in the developing brain and to determine shifts in the microglia state. We functionally challenged microglia state using a brain injury model and, to assess the neuronal signaling environment, performed functional neuroimaging experiments using the photoconvertible calcium indicator calcium-modulated photoactivatable ratiometric integrator (CaMPARI). These studies were paired with optogenetic manipulations of neurons and microglia, an untargeted metabolome-wide association study (MWAS), and behavioral assays. RESULTS Developmental PFOS exposure resulted in a shift away from the homeostatic microglia state, as determined by functional and morphological differences in exposed larvae, as well as up-regulation of the microglia activation gene p2ry12. PFOS-induced effects on microglia state exacerbated microglia responses to brain injury in the absence of increased cell death or inflammation. PFOS exposure also heightened neural activity, and optogenetic silencing of neurons or microglia independently was sufficient to normalize microglial responses to injury. An untargeted MWAS of larval brains revealed PFOS-exposed larvae had neurochemical signatures of excitatory-inhibitory imbalance. Behaviorally, PFOS-exposed larvae also exhibited anxiety-like thigmotaxis. To test whether the neuronal and microglial phenotypes were specific to PFOS, we exposed embryos to PFOA, a known immunotoxic PFAS. PFOA did not alter thigmotaxis, neuronal activity, or microglial responses, further supporting a role for neuronal activity as a critical modifier of microglial function following PFOS exposure. DISCUSSION Together, this study provides, to our knowledge, the first detailed account of the effects of PFOS exposure on neural cell types in the developing brain in vivo and adds neuronal hyperactivity as an important end point to assess when studying the impact of toxicant exposures on microglia function. https://doi.org/10.1289/EHP12861.
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Affiliation(s)
- Shannon E. Paquette
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | - Nathan R. Martin
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | - April Rodd
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | - Katherine E. Manz
- School of Engineering, Brown University, Providence, Rhode Island, USA
| | - Eden Allen
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | - Manuel Camarillo
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | - Hannah I. Weller
- Department of Ecology, Evolution, and Organismal Biology, Brown University, Providence, Rhode Island, USA
| | - Kurt Pennell
- School of Engineering, Brown University, Providence, Rhode Island, USA
| | - Jessica S. Plavicki
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
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21
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Liu Y, Huo WB, Deng JY, Tang QP, Wang JX, Liao YL, Gou D, Pei DS. Neurotoxicity and the potential molecular mechanisms of mono-2-ethylhexyl phthalic acid (MEHP) in zebrafish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 265:115516. [PMID: 37757626 DOI: 10.1016/j.ecoenv.2023.115516] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 09/18/2023] [Accepted: 09/22/2023] [Indexed: 09/29/2023]
Abstract
Mono-2-ethylhexyl phthalic acid (MEHP) is the most toxic metabolite of plasticizer di-2-ethylhexyl phthalic acid (DEHP), and there is limited information available on the effects of MEHP on neurotoxicity. This study aims to examine the neurotoxicity of MEHP and preliminarily explore its potential molecular mechanisms. We found that MEHP impeded the growth of zebrafish embryos and the neurodevelopmental-related gene expression at environmentally relevant concentrations. MEHP exposure also induces oxidative stress response and brain cell apoptosis accompanied by a decrease in acetylcholinesterase (AChE) activity in zebrafish larvae. RNA-Seq and bioinformatics analysis showed that MEHP treatment altered the nervous system, neurogenic diseases, and visual perception pathways. The locomotor activity in dark-to-light cycles and phototaxis test confirmed the abnormal neural behavior of zebrafish larvae. Besides, the immune system has produced a large number of differentially expressed genes related to neural regulation. Inflammatory factor IL1β and IL-17 signaling pathways highly respond to MEHP, indicating that inflammation caused by immune system imbalance is a potential mechanism of MEHP-induced neurotoxicity. This study expands the understanding of the toxicity and molecular mechanisms of MEHP, providing a new perspective for in-depth neurotoxicity exploration of similar compounds.
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Affiliation(s)
- Yiyun Liu
- School of Public Health, Chongqing Medical University, Chongqing 400016, China
| | - Wen-Bo Huo
- School of Public Health, Chongqing Medical University, Chongqing 400016, China
| | - Jiao-Yun Deng
- School of Public Health, Chongqing Medical University, Chongqing 400016, China
| | - Qi-Ping Tang
- School of Public Health, Chongqing Medical University, Chongqing 400016, China
| | - Jin-Xia Wang
- School of Public Health, Chongqing Medical University, Chongqing 400016, China
| | - Yan-Ling Liao
- School of Public Health, Chongqing Medical University, Chongqing 400016, China
| | - Dongzhi Gou
- School of Public Health, Chongqing Medical University, Chongqing 400016, China
| | - De-Sheng Pei
- School of Public Health, Chongqing Medical University, Chongqing 400016, China.
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22
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Fan YY, Chu C, Zhang YT, Zhao K, Liang LX, Huang JW, Zhou JX, Guo LH, Wu LY, Lin LZ, Liu RQ, Feng W, Dong GH, Zhao X. Environmental pollutant pre- and polyfluoroalkyl substances are associated with electrocardiogram parameters disorder in adults. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131832. [PMID: 37336106 DOI: 10.1016/j.jhazmat.2023.131832] [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: 01/26/2023] [Revised: 05/14/2023] [Accepted: 06/09/2023] [Indexed: 06/21/2023]
Abstract
Environmental pollutants exposure might disrupt cardiac function, but evidence about the associations of per- and polyfluoroalkyl substances (PFASs) exposure and cardiac conduction system remains sparse. To explore the associations between serum PFASs exposure and electrocardiogram (ECG) parameters changes in adults, we recruited 1229 participants (mean age: 55.1 years) from communities of Guangzhou, China. 13 serum PFASs with detection rate > 85% were analyzed finally. We selected 6 ECG parameters [heart rate (HR), PR interval, QRS duration, Bazett heart rate-corrected QT interval (QTc), QRS electric axis and RV5 + SV1 voltage] as outcomes. Generalized linear models (GLMs) and Bayesian kernel machine regression (BKMR) model were conducted to explore the associations of individual and joint PFASs exposure and ECG parameters changes, respectively. We detected significant associations of PFASs exposure with decreased HR, QRS duration, but with increased PR interval. For example, at the 95th percentile of 6:2 Cl-PFESA, HR and QRS duration were - 6.98 [95% confidence interval (CI): - 9.07, - 4.90] and - 6.54(95% CI: -9.05, -4.03) lower, but PR interval was 7.35 (95% CI: 3.52, 11.17) longer than those at the 25th percentile. Similarly, significant joint associations were observed in HR, PR interval and QRS duration when analyzed by BKMR model.
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Affiliation(s)
- Yuan-Yuan Fan
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Chu Chu
- Guangdong Cardiovascular Institute, Department of Reproductive Medicine, Department of Obstetrics and Gynecology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Yun-Ting Zhang
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Kun Zhao
- Department of Reproductive Medicine, Department of Obstetrics and Gynecology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Li-Xia Liang
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Jing-Wen Huang
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Jia-Xin Zhou
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Li-Hao Guo
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Lu-Yin Wu
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Li-Zi Lin
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Ru-Qing Liu
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Wenru Feng
- Department of Environmental Health, Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China.
| | - Guang-Hui Dong
- Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China.
| | - Xiaomiao Zhao
- Department of Reproductive Medicine, Department of Obstetrics and Gynecology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China.
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23
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Mathiron AGE, Rejo L, Chapeau F, Malgouyres JM, Silvestre F, Vignet C. Tools for photomotor response assay standardization in ecotoxicological studies: Example of exposure to gentamicin in the freshwater planaria Schmidtea mediterranea. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 102:104242. [PMID: 37573897 DOI: 10.1016/j.etap.2023.104242] [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: 03/11/2023] [Revised: 08/05/2023] [Accepted: 08/08/2023] [Indexed: 08/15/2023]
Abstract
Photomotor response assay (PMR) is very useful in an ecotoxicological context because it allows evaluation of behavioral response to potential toxic compounds. However, a lack of procedure standardization makes results comparison difficult between labs and organisms. Here, we aimed to propose five different tools to standardize the PMR procedure so that it may be applied to all model species, regarding: (1) the minimum total sample size, (2) the acclimation period, (3) the number and duration of light and dark phases alternation, (4) the measured behavior, and (5) the statistical analysis. As an example of procedure application, we analyzed the effect of an exposure to the antibiotic gentamicin on the locomotion behavior during PMR in an invertebrate species: the asexual freshwater planaria Schmidtea mediterranea. We encourage future studies using PMR to follow these five tools to improve data analysis and results comparability.
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Affiliation(s)
- Anthony G E Mathiron
- Laboratory of Evolutionary and Adaptive Physiology, University of Namur, 61 Rue de Bruxelles, 5000 Namur, Belgium; Institute of Life, Earth, and Environment (ILEE), University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium.
| | - Lucia Rejo
- Biochimie et Toxicologie des Substances Bioactives (BTSB), EA7417, INU Champollion, Place de Verdun, 81000 Albi, France
| | - Florian Chapeau
- Biochimie et Toxicologie des Substances Bioactives (BTSB), EA7417, INU Champollion, Place de Verdun, 81000 Albi, France
| | - Jean-Michel Malgouyres
- Biochimie et Toxicologie des Substances Bioactives (BTSB), EA7417, INU Champollion, Place de Verdun, 81000 Albi, France
| | - Frédéric Silvestre
- Laboratory of Evolutionary and Adaptive Physiology, University of Namur, 61 Rue de Bruxelles, 5000 Namur, Belgium; Institute of Life, Earth, and Environment (ILEE), University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Caroline Vignet
- Biochimie et Toxicologie des Substances Bioactives (BTSB), EA7417, INU Champollion, Place de Verdun, 81000 Albi, France
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24
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Lu K, Wu J, Tang S, Wang Y, Zhang L, Chai F, Liang XF. Altered Visual Function in Short-Wave-Sensitive 1 ( sws1) Gene Knockout Japanese Medaka ( Oryzias latipes) Larvae. Cells 2023; 12:2157. [PMID: 37681889 PMCID: PMC10486665 DOI: 10.3390/cells12172157] [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: 06/20/2023] [Revised: 07/29/2023] [Accepted: 08/21/2023] [Indexed: 09/09/2023] Open
Abstract
Visual perception plays a crucial role in foraging, avoiding predators, mate selection, and communication. The regulation of color vision is largely dependent on opsin, which is the first step in the formation of the visual transduction cascade in photoreceptor cells. Short-wave-sensitive 1 (sws1) is a visual pigment that mediates short-wavelength light transduction in vertebrates. The depletion of sws1 resulted in increased M-opsin in mice. However, there is still no report on the visual function of sws1 in teleost fish. Here, we constructed the sws1 knockout medaka using CRISPR/Cas9 technology. The 6 dph (days post-hatching) medaka sws1-/- larvae exhibited significantly decreased food intake and total length at the first feeding stage, and the mRNA levels of orexigenic genes (npy and agrp) were significantly upregulated after feeding. The swimming speed was significantly reduced during the period of dark-light transition stimulation in the sws1-mutant larvae. Histological analysis showed that the thickness of the lens was reduced, whereas the thickness of the ganglion cell layer (GCL) was significantly increased in sws1-/- medaka larvae. Additionally, the deletion of sws1 decreased the mRNA levels of genes involved in phototransduction (gnb3b, grk7a, grk7b, and pde6c). We also observed increased retinal cell apoptosis and oxidative stress in sws1 knockout medaka larvae. Collectively, these results suggest that sws1 deficiency in medaka larvae may impair visual function and cause retinal cell apoptosis, which is associated with the downregulation of photoconduction expression and oxidative stress.
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Affiliation(s)
- Ke Lu
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China; (K.L.); (Y.W.)
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Jiaqi Wu
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China; (K.L.); (Y.W.)
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Shulin Tang
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China; (K.L.); (Y.W.)
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Yuye Wang
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China; (K.L.); (Y.W.)
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Lixin Zhang
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China; (K.L.); (Y.W.)
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Farui Chai
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China; (K.L.); (Y.W.)
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Xu-Fang Liang
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China; (K.L.); (Y.W.)
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
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25
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Lu K, Wu J, Tang S, Jia X, Liang XF. Knockout of sws2a and sws2b in Medaka ( Oryzias latipes) Reveals Their Roles in Regulating Vision-Guided Behavior and Eye Development. Int J Mol Sci 2023; 24:ijms24108786. [PMID: 37240129 DOI: 10.3390/ijms24108786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/20/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023] Open
Abstract
The medaka (Oryzias latipes) is an excellent vertebrate model for studying the development of the retina. Its genome database is complete, and the number of opsin genes is relatively small compared to zebrafish. Short wavelength sensitive 2 (sws2), a G-protein-coupled receptor expressed in the retina, has been lost in mammals, but its role in eye development in fish is still poorly understood. In this study, we established a sws2a and sws2b knockout medaka model by CRISPR/Cas9 technology. We discovered that medaka sws2a and sws2b are mainly expressed in the eyes and may be regulated by growth differentiation factor 6a (gdf6a). Compared with the WT, sws2a-/- and sws2b-/- mutant larvae displayed an increase in swimming speed during the changes from light to dark. We also observed that sws2a-/- and sws2b-/- larvae both swam faster than WT in the first 10 s of the 2 min light period. The enhanced vision-guided behavior in sws2a-/- and sws2b-/- medaka larvae may be related to the upregulation of phototransduction-related genes. Additionally, we also found that sws2b affects the expression of eye development genes, while sws2a is unaffected. Together, these findings indicate that sws2a and sws2b knockouts increase vision-guided behavior and phototransduction, but on the other hand, sws2b plays an important role in regulating eye development genes. This study provides data for further understanding of the role of sws2a and sws2b in medaka retina development.
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Affiliation(s)
- Ke Lu
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Jiaqi Wu
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Shulin Tang
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Xiaodan Jia
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
| | - Xu-Fang Liang
- College of Fisheries, Chinese Perch Research Center, Huazhong Agricultural University, Wuhan 430070, China
- Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, China
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26
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Hawkey AB, Mead M, Natarajan S, Gondal A, Jarrett O, Levin ED. Embryonic exposure to PFAS causes long-term, compound-specific behavioral alterations in zebrafish. Neurotoxicol Teratol 2023; 97:107165. [PMID: 36801483 PMCID: PMC10198882 DOI: 10.1016/j.ntt.2023.107165] [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: 08/19/2022] [Revised: 02/06/2023] [Accepted: 02/13/2023] [Indexed: 02/20/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are commonly used as surfactants and coatings for industrial processes and consumer products. These compounds have been increasingly detected in drinking water and human tissue, and concern over their potential effects on health and development is growing. However, relatively little data are available for their potential impacts on neurodevelopment and the degree to which different compounds within this class may differ from one another in their neurotoxicity. The present study examined the neurobehavioral toxicology of two representative compounds in a zebrafish model. Zebrafish embryos were exposed to 0.1-100uM perfluorooctanoic acid (PFOA) or 0.01-1.0uM perfluorooctanesulfonic acid (PFOS) from 5 to 122 h post-fertilization. These concentrations were below threshold for producing increased lethality or overt dysmorphologies, and PFOA was tolerated at a concentration 100× higher than PFOS. Fish were maintained to adulthood, with behavioral assessments at 6 days, 3 months (adolescence) and 8 months of age (adulthood). Both PFOA and PFOS caused behavioral changes in zebrafish, but PFOS and PFOS produced strikingly different phenotypes. PFOA was associated with increased larval motility in the dark (100uM), and enhanced diving responses in adolescence (100uM) but not adulthood. PFOS was associated with a reversed light-dark response in the larval motility test (0.1-1uM), whereby the fish were more active in the light than the dark. PFOS also caused time-dependent changes in locomotor activity in the novel tank test during adolescence (0.1-1.0uM) and an overall pattern of hypoactivity in adulthood at the lowest concentration (0.01uM). Additionally, the lowest concentration of PFOS (0.01uM) reduced acoustic startle magnitude in adolescence, but not adulthood. These data suggest that PFOS and PFOA both produce neurobehavioral toxicity, but these effects are quite distinct from one another.
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Affiliation(s)
- Andrew B Hawkey
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, USA
| | - Mikayla Mead
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, USA
| | - Sarabesh Natarajan
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, USA
| | - Anas Gondal
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, USA
| | - Olivia Jarrett
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, USA
| | - Edward D Levin
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, USA.
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27
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Wen ZJ, Wei YJ, Zhang YF, Zhang YF. A review of cardiovascular effects and underlying mechanisms of legacy and emerging per- and polyfluoroalkyl substances (PFAS). Arch Toxicol 2023; 97:1195-1245. [PMID: 36947184 DOI: 10.1007/s00204-023-03477-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 03/02/2023] [Indexed: 03/23/2023]
Abstract
Cardiovascular disease (CVD) poses the leading threats to human health and life, and their occurrence and severity are associated with exposure to environmental pollutants. Per- and polyfluoroalkyl substances (PFAS), a group of widely used industrial chemicals, are characterized by persistence, long-distance migration, bioaccumulation, and toxicity. Some PFAS, particularly perfluorooctane sulfonic acid (PFOS), perfluorooctanoic acid (PFOA) and perfluorohexanesulfonic acid (PFHxS), have been banned, leaving only legacy exposure to the environment and human body, while a number of novel PFAS alternatives have emerged and raised concerns, such as polyfluoroalkyl ether sulfonic and carboxylic acid (PFESA and PFECA) and sodium p-perfluorous nonenoxybenzene sulfonate (OBS). Overall, this review systematically elucidated the adverse cardiovascular (CV) effects of legacy and emerging PFAS, emphasized the dose/concentration-dependent, time-dependent, carbon chain length-dependent, sex-specific, and coexposure effects, and discussed the underlying mechanisms and possible prevention and treatment. Extensive epidemiological and laboratory evidence suggests that accumulated serum levels of legacy PFAS possibly contribute to an increased risk of CVD and its subclinical course, such as cardiac toxicity, vascular disorder, hypertension, and dyslipidemia. The underlying biological mechanisms may include oxidative stress, signaling pathway disturbance, lipid metabolism disturbance, and so on. Various emerging alternatives to PFAS also play increasingly prominent toxic roles in CV outcomes that are milder, similar to, or more severe than legacy PFAS. Future research is recommended to conduct more in-depth CV toxicity assessments of legacy and emerging PFAS and explore more effective surveillance, prevention, and treatment strategies, accordingly.
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Affiliation(s)
- Zeng-Jin Wen
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Yi-Jing Wei
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Yi-Fei Zhang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Yin-Feng Zhang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China.
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Billat PA, Vogs C, Blassiau C, Brochot C, Wincent E, Brion F, Beaudouin R. PBTK modeled perfluoroalkyl acid kinetics in zebrafish eleutheroembryos suggests impacts on bioconcentrations by chorion porosity dynamics. Toxicol In Vitro 2023; 89:105588. [PMID: 36958675 DOI: 10.1016/j.tiv.2023.105588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 03/14/2023] [Accepted: 03/17/2023] [Indexed: 03/25/2023]
Abstract
The zebrafish eleutheroembryo (zfe) is widely used as a model to characterize the toxicity of chemicals. However, analytical methods are still missing to measure organ concentrations. Therefore, physiologically-based toxicokinetic (PBTK) modeling may overcome current limitations to help understand the relationship between toxic effects and internal exposure in various organs. A previous PBTK model has been updated to include the chorionic transport barrier and its permeabilization, hatching dynamics within a zfe population over development, and active mediated transport mechanisms. The zfe PBTK model has been calibrated using measured time-dependent internal concentrations of PFBA, PFHxS, PFOA, and PFOS in a zfe population and evaluated using external datasets from the literature. Calibration was successful with 96% of the predictions falling within a 2-fold range of the observed concentrations. The external dataset was correctly estimated with about 50% of the predictions falling within a factor of 3 of the observed data and 10% of the predictions are out of the 10-fold error. The calibrated model suggested that active mediated transport differs between PFAS with a sulfonic and carboxylic acid functional end groups. This PBTK model predicts well the fate of PFAS with various physicochemical properties in zfe. Therefore, this model may improve the use of zfe as an alternative model in toxicokinetic-toxicodynamic studies and help to refine and reduce zfe-based experiments, while giving insights into the internal kinetics of chemicals.
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Affiliation(s)
- Pierre-André Billat
- INERIS, Experimental toxicology and modeling unit (TEAM), Parc ALATA BP2, Verneuil en Halatte, France
| | - Carolina Vogs
- Department of Biomedical Science and Veterinary Public Health, Swedish University of Agricultural Science (SLU), Uppsala, Sweden; Institute of Environmental Medicine, Karolinska Institutet (KI), Stockholm, Sweden
| | - Clément Blassiau
- INERIS, Experimental toxicology and modeling unit (TEAM), Parc ALATA BP2, Verneuil en Halatte, France
| | - Céline Brochot
- INERIS, Experimental toxicology and modeling unit (TEAM), Parc ALATA BP2, Verneuil en Halatte, France
| | - Emma Wincent
- Institute of Environmental Medicine, Karolinska Institutet (KI), Stockholm, Sweden
| | - François Brion
- INERIS, Ecotoxicology of substances and environments unit (ESMI), Parc ALATA BP2, Verneuil en Halatte, France; UMR-I 02 SEBIO, Parc ALATA BP2, Verneuil en Halatte, INERIS, France
| | - Rémy Beaudouin
- INERIS, Experimental toxicology and modeling unit (TEAM), Parc ALATA BP2, Verneuil en Halatte, France; UMR-I 02 SEBIO, Parc ALATA BP2, Verneuil en Halatte, INERIS, France.
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Bai C, Zheng Y, Tian L, Lin J, Song Y, Huang C, Dong Q, Chen J. Structure-based developmental toxicity and ASD-phenotypes of bisphenol A analogues in embryonic zebrafish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 253:114643. [PMID: 36805134 DOI: 10.1016/j.ecoenv.2023.114643] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 02/08/2023] [Accepted: 02/11/2023] [Indexed: 06/18/2023]
Abstract
Autism spectrum disorder (ASD) is a neurodevelopmental disorder that has become more prevalent in recent years. Environmental endocrine disruptor bisphenol A (BPA) has been linked to ASD. BPA analogues (BPs) are structure-modified substitutes widely used as safer alternatives in consumer products, yet few studies have explored the developmental neurotoxicity (DNT) of BPA analogues. In the present study, we used the larval zebrafish model to assess the DNT effects of BPA and its analogues. Our results showed that many BPA analogues are more toxic than BPA in the embryonic zebrafish assay regarding teratogenic effect and mortality, which may partially due to differences in lipophilicity and/or different substitutes of structural function groups such as CF3, benzene, or cyclohexane. At sublethal concentrations, zebrafish embryos exposed to BPA or BPs also displayed reduced prosocial behavior in later larval development, evidenced by increased nearest neighbor distance (NND) and the interindividual distance (IID) in shoaling, which appears to be structurally independent. An in-depth analysis of BPA, bisphenol F (BPF), and bisphenol S (BPS) revealed macrocephaly and ASD-like behavioral deficits resulting from exposures to sublethal concentrations of these chemicals. The ASD-like behavioral deficits were characterized by hyperactivity, increased anxiety-like behavior, and decreased social contact. Mechanistically, accelerated neurogenesis that manifested by increased cell proliferation, the proportion of newborn mature neurons, and the number of neural stem cells in proliferation, as well as upregulated genes related to the K+ channels, may have contributed to the observed ASD-like morphological and behavioral alterations. Our findings indicate that BPF and BPS may also pose significant risks to ASD development in humans and highlight the importance of a comprehensive assessment of DNT effects for all BPA analogues in the future.
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Affiliation(s)
- Chenglian Bai
- School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, PR China; The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Yi Zheng
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Linjie Tian
- School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Jian Lin
- The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Yang Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PR China
| | - Changjiang Huang
- School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Qiaoxiang Dong
- School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, PR China; The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, PR China.
| | - Jiangfei Chen
- School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, PR China.
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30
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Gong S, McLamb F, Shea D, Vu JP, Vasquez MF, Feng Z, Bozinovic K, Hirata KK, Gersberg RM, Bozinovic G. Toxicity assessment of hexafluoropropylene oxide-dimer acid on morphology, heart physiology, and gene expression during zebrafish (Danio rerio) development. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:32320-32336. [PMID: 36462083 PMCID: PMC10017623 DOI: 10.1007/s11356-022-24542-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 11/25/2022] [Indexed: 05/25/2023]
Abstract
Hexafluoropropylene oxide-dimer acid (HFPO-DA) is one of the emerging replacements for the "forever" carcinogenic and toxic long-chain PFAS. HFPO-DA is a polymerization aid used for manufacturing fluoropolymers, whose global distribution and undetermined toxic properties are a concern regarding human and ecological health. To assess embryotoxic potential, zebrafish embryos were exposed to HFPO-DA at concentrations of 0.5-20,000 mg/L at 24-, 48-, and 72-h post-fertilization (hpf). Heart rate increased significantly in embryos exposed to 2 mg/L and 10 mg/L HFPO-DA across all time points. Spinal deformities and edema phenotypes were evident among embryos exposed to 1000-16,000 mg/L HFPO-DA at 72 hpf. A median lethal concentration (LC50) was derived as 7651 mg/L at 72 hpf. Shallow RNA sequencing analysis of 9465 transcripts identified 38 consistently differentially expressed genes at 0.5 mg/L, 1 mg/L, 2 mg/L, and 10 mg/L HFPO-DA exposures. Notably, seven downregulated genes were associated with visual response, and seven upregulated genes were expressed in or regulated the cardiovascular system. This study identifies biological targets and molecular pathways affected during animal development by an emerging, potentially problematic, and ubiquitous industrial chemical.
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Affiliation(s)
- Sylvia Gong
- Boz Life Science Research and Teaching Institute, San Diego, CA, USA
- Division of Extended Studies, University of California San Diego, La Jolla, CA, 92093-0355, USA
- School of Public Health, San Diego State University, San Diego, CA, USA
| | - Flannery McLamb
- Boz Life Science Research and Teaching Institute, San Diego, CA, USA
- Division of Extended Studies, University of California San Diego, La Jolla, CA, 92093-0355, USA
| | | | - Jeanne P Vu
- Boz Life Science Research and Teaching Institute, San Diego, CA, USA
- Division of Extended Studies, University of California San Diego, La Jolla, CA, 92093-0355, USA
- School of Public Health, San Diego State University, San Diego, CA, USA
| | - Miguel F Vasquez
- Boz Life Science Research and Teaching Institute, San Diego, CA, USA
- Division of Extended Studies, University of California San Diego, La Jolla, CA, 92093-0355, USA
| | - Zuying Feng
- Boz Life Science Research and Teaching Institute, San Diego, CA, USA
- School of Public Health, San Diego State University, San Diego, CA, USA
| | - Kesten Bozinovic
- Boz Life Science Research and Teaching Institute, San Diego, CA, USA
- Division of Extended Studies, University of California San Diego, La Jolla, CA, 92093-0355, USA
- Graduate School of Arts and Sciences, Georgetown University, Washington, DC, USA
| | - Ken K Hirata
- Boz Life Science Research and Teaching Institute, San Diego, CA, USA
- Division of Extended Studies, University of California San Diego, La Jolla, CA, 92093-0355, USA
| | | | - Goran Bozinovic
- Boz Life Science Research and Teaching Institute, San Diego, CA, USA.
- School of Public Health, San Diego State University, San Diego, CA, USA.
- Division of Biological Sciences, University of California San Diego, La Jolla, CA, 92093-0355, USA.
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31
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Yang Z, Fu L, Cao M, Li F, Li J, Chen Z, Guo A, Zhong H, Li W, Liang Y, Luo Q. PFAS-induced lipidomic dysregulations and their associations with developmental toxicity in zebrafish embryos. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 861:160691. [PMID: 36473658 DOI: 10.1016/j.scitotenv.2022.160691] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/26/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Per- and polyfluoroalkyl substances (PFASs) are persistent environmental contaminants, posing developmental toxicity to fish and human. PFAS-induced lipid metabolism disorders were demonstrated using the zebrafish (Danio rerio) embryo model, but the detailed changes of lipid compositions and the influence of these changes on the biological development are still unclear. Herein, lipidomics analysis was performed to reveal the dysregulations of lipid metabolism in zebrafish embryos exposed to perfluorooctanoic acid (PFOA) or perfluorooctane sulfonate (PFOS) through microinjection. Various abnormal phenotypes were observed, including heart bleeding, pericardium edema, spinal curvature and increased heart rate at 72 h after fertilization, especially in the PFOS exposure groups. Lipidomic profiling found downregulated phosphatidylethanolamines in the PFAS-exposed embryos, especially those containing a docosahexaenoyl (DHA) chain, indicating an excessive oxidative damage to the embryos. Glycerolipids were mainly upregulated in the PFOA groups but downregulated in the PFOS groups. These aberrations may reflect oxidative stress, energy metabolism malfunction and proinflammatory signals induced by PFASs. However, supplement of DHA may not be effective in recovering the lipidomic dysregulations and protecting from the developmental toxicity induced by PFASs, showing the complexity of the toxicological mechanisms. This work has revealed the associations between the abnormal phenotypes and dysregulations of lipid metabolism in zebrafish embryos induced by PFASs from the aspect of lipidomics, and discovered the underlying molecular mechanisms of the developmental toxicity of PFASs.
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Affiliation(s)
- Zhiyi Yang
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Lei Fu
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Mengxi Cao
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Fang Li
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Jingguang Li
- The Key Laboratory of Food Safety Risk Assessment, Ministry of Health, China National Center of Food Safety and Risk Assessment, Beijing 100021, China
| | - Zhiyu Chen
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Ang Guo
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Huifang Zhong
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Wenbo Li
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Yong Liang
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Qian Luo
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
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32
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Tao J, Yang Q, Jing M, Sun X, Tian L, Huang X, Huang X, Wan W, Ye H, Zhang T, Hong F. Embryonic benzophenone-3 exposure inhibited fertility in later-life female zebrafish and altered developmental morphology in offspring embryos. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:49226-49236. [PMID: 36773251 DOI: 10.1007/s11356-023-25843-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 02/06/2023] [Indexed: 02/12/2023]
Abstract
Benzophenone-3 (BP3), an organic UV filter widely used in personal care products, is ubiquitous in aquatic environments. Previous studies have shown that BP3 can interfere with oocytes development in the ovary. The current study was conducted to evaluate the effects of embryonic BP3 exposure on reproductive outcomes in later life. Zebrafish embryos were exposed to different concentrations of BP3 (0, 1, 10, 100 μg/L) for 5 days in the developmental stage and subsequently fed for 4 months without any toxins. The body length, body weight, and ovary weight in F0 female adult zebrafish and morphology indices in F1 offspring embryos were measured. The reproductive behaviors of adult zebrafish were recorded by a digital camera. HE staining was used to estimate the development of oocytes and the proportion of different phases was calculated. qPCR was used to detect the expression levels of reproduction-related genes of the hypothalamic-pituitary-gonadal (HPG) axis. Our findings revealed that the body length and body weight were not changed with embryonic BP3 exposure, but BP3 exposure inhibited the development and maturation of ovaries in later-life female zebrafish, accompanied by an increased proportion of follicles in the primary growth and early vitellogenic stages, and a decline in the full-growth stage in ovaries. Meanwhile, reduced egg production, delayed hatching rate, altered somite count and increased mortality rate were observed at 100 μg/L in offspring embryos. Behavioral results showed that BP3 exposure reduced the frequency of chasing, touching, entering the spawning area, and the duration of fish entering the spawning area later in life, qPCR analysis showed that the expression levels of reproduction-related genes of the HPG axis were downregulated in females, following a decreasing trend in plasma E2 and 11-KT levels. These results suggested that embryonic BP3 exposure negatively affected the fertility of fish and the development of their offspring embryos, which may cause potential risks to aquatic ecosystems and human health.
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Affiliation(s)
- Junyan Tao
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Qinyuan Yang
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Min Jing
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Xiaowei Sun
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Linxuan Tian
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Xin Huang
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Xiaoli Huang
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Wenlu Wan
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Hui Ye
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Ting Zhang
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Feng Hong
- School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China.
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Zhang T, Zhao S, Dong F, Jia Y, Chen X, Sun Y, Zhu L. Novel Insight into the Mechanisms of Neurotoxicity Induced by 6:6 PFPiA through Disturbing the Gut-Brain Axis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:1028-1038. [PMID: 36594808 DOI: 10.1021/acs.est.2c04765] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
As alternatives to traditional per- and polyfluoroalkyl substances, perfluoroalkyl phosphonic acids (PFPiAs) are frequently detected in aquatic environments, but the neurotoxic effects and underlying mechanisms remain unclear. In this study, male zebrafish were exposed to 6:6 PFPiA (1 and 10 nM) for 28 days, which exhibited anxiety-like symptoms. Gut microbiome results indicated that 6:6 PFPiA significantly increased the abundance of Gram-negative bacteria, leading to enhanced levels of lipopolysaccharide (LPS) and inflammation in the gut. The LPS was delivered to the brain through the gut-brain axis (GBA), damaged the blood-brain barrier (BBB), stimulated neuroinflammation, and caused apoptosis as well as neural injury in the brain. This mechanism was verified by the fact that antibiotics reduced the LPS levels in the gut and brain, accompanied by reduced inflammatory responses and anxiety-like behavior. The BBB damage also resulted in the enhanced accumulation of 6:6 PFPiA in the brain, where it might bind strongly with and activate aryl hydrocarbon receptor (AhR) to induce brain inflammation directly. Additionally, as the fish received treatment with an inhibitor of AhR, the inflammation response and anxiety-like behavior decreased distinctly. This study sheds light on the new mechanisms of neurotoxicity-induced 6:6 PFPiA due to the interruption on GBA.
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Affiliation(s)
- Tianxu Zhang
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P.R. China
| | - Sujuan Zhao
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P.R. China
- School of Public Health, Anhui Medical University, Hefei 230032, P.R. China
| | - Fengfeng Dong
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P.R. China
| | - Yibo Jia
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P.R. China
| | - Xin Chen
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P.R. China
| | - Yumeng Sun
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P.R. China
| | - Lingyan Zhu
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, P.R. China
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Dong Z, Li X, Chen Y, Zhang N, Wang Z, Liang YQ, Guo Y. Short-term exposure to norethisterone affected swimming behavior and antioxidant enzyme activity of medaka larvae, and led to masculinization in the adult population. CHEMOSPHERE 2023; 310:136844. [PMID: 36252902 DOI: 10.1016/j.chemosphere.2022.136844] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 09/27/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Norethisterone (NET), one of the synthetic progestins, is detected with increasing frequency in the water environment and distributed in the ocean, with a potential toxicity risk to marine organisms. However, current studies on the adverse effects of progestins (including NET) in aquatic environments have focused on freshwater organisms, mainly fish. In the present, marine medaka (Oryzias melastigma) larvae were exposed to 91.31 ng/L NET for 10 days, and then the swimming behavior, oxidation-antioxidant-related enzyme activities, sex and thyroid hormone levels, and the gene transcription patterns of the larvae were measured. After NET treatment, medaka larvae were raised in artificial seawater until 5 months of age, and the sex ratio was counted. Ten-day exposure to 91.31 ng/L NET inhibited swimming behavior, of marine medaka larvae, which showed that the time in the resting state was significantly prolonged, while the time in the large motor state was significantly reduced; disrupted oxidative-antioxidant system, significantly up-regulated the enzymatic activities of reactive oxygen species (ROS), malondialdehyde (MDA), and glutathione peroxidase (GSH-Px); affected the hormone levels of larvae, lowered 11- keto testosterone (11-KT) and triiodothyronine (T3) concentrations. RNA-seq results showed that 91.31 ng/L NET exposure for 10 days changed the transcript levels of 275 genes, of which 28 were up-regulated and 247 were down-regulated. Differentially expressed genes (DEGs) were mainly significantly enriched in piwi interacting RNA (piRNA), gonadal development, gametogenesis, and steroidogenesis biological processes, etc. After removing NET exposure and returning to breeding for 140 days, a significant increase in male proportions (69.67%) was observed in sexually mature medaka populations in the NET-treated group. These results show that exposure to 91.31 ng/L NET for 10 days can lead to various adverse effects on marine medaka larvae. These findings shed light on the potential ecological risks of synthetic progestins to marine organisms.
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Affiliation(s)
- Zhongdian Dong
- Key Laboratory of Aquaculture in the South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang, 524088, PR China; Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, Fisheries College, Guangdong Ocean University, Zhanjiang, 524088, PR China.
| | - Xueyou Li
- Key Laboratory of Aquaculture in the South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang, 524088, PR China.
| | - Yuebi Chen
- Key Laboratory of Aquaculture in the South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang, 524088, PR China.
| | - Ning Zhang
- Key Laboratory of Aquaculture in the South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang, 524088, PR China.
| | - Zhongduo Wang
- Key Laboratory of Aquaculture in the South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang, 524088, PR China; State Laboratory of Developmental Biology of Freshwater Fish, College of Life Sciences, Hunan Normal University School, Changsha, 410081, PR China.
| | - Yan-Qiu Liang
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, PR China.
| | - Yusong Guo
- Key Laboratory of Aquaculture in the South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang, 524088, PR China.
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35
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Huang M, Ivantsova E, Konig I, Patel N, English C, Souders CL, Martyniuk CJ. Developmental and mitochondrial toxicity assessment of perfluoroheptanoic acid (PFHpA) in zebrafish (Danio rerio). ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 97:104037. [PMID: 36526081 DOI: 10.1016/j.etap.2022.104037] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 12/07/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
The potential toxicity of several perfluoroalkyl and polyfluoroalkyl substances (PFASs) to aquatic species are not well understood. Here, we assessed the sub-lethal toxicity potential of perfluoroheptanoic acid (PFHpA) to developing zebrafish. PFHpA was not acutely toxic to fish up to 50 µM and there was > 96% survival in all treatments. Exposure to 200 µM PFHpA decreased ATP-linked respiration of embryos. There was no evidence for ROS induction in 7-day-old larvae fish exposed to 0.1 µM or 1 µM PFHpA. Twenty-four transcripts related to mitochondrial complexes I through V were measured and atp06, cox4i1, and cyc1 levels were decreased in larval zebrafish in a concentration-dependent manner by PFHpA exposure. Locomotor activity was reduced in fish exposed to 0.1 µM PFHpA based on a visual motor response test. Anxiolytic-type behaviors were not affected by PFHpA. This study contributes to environmental risk assessments for perfluorinated chemicals.
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Affiliation(s)
- Michelle Huang
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Emma Ivantsova
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Isaac Konig
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA; Department of Chemistry, Federal University of Lavras (UFLA), Minas Gerais, Brazil
| | - Neep Patel
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Cole English
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Christopher L Souders
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Christopher J Martyniuk
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA; UF Genetics Institute, Interdisciplinary Program in Biomedical Sciences Neuroscience, USA.
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36
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Sun X, Yang Q, Jing M, Jia X, Tian L, Tao J. Environmentally relevant concentrations of organic (benzophenone-3) and inorganic (titanium dioxide nanoparticles) UV filters co-exposure induced neurodevelopmental toxicity in zebrafish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 249:114343. [PMID: 36508829 DOI: 10.1016/j.ecoenv.2022.114343] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 11/20/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
UV filters, widely used in personal care products, are ubiquitous environmental pollutants detected and pose a significant public health concern. Benzophenone-3 (BP3) and titanium dioxide nanoparticles (nano-TiO2) are the predominant organic and inorganic UV filters in environmental media. However, few studies have explored the combined developmental neurotoxic (DNT) effects and the underlying mechanisms when co-exposed to BP3 and nano-TiO2. In the present study, zebrafish (Danio rerio) embryos were exposed to environmentally relevant concentrations of BP3 (10 μg/L), nano-TiO2 (100 μg/L), and mixtures starting from 6 h post fertilization (hpf), respectively. Developmental indicators and motor behaviors were investigated at various developmental stages. Our results showed that BP3 alone or co-exposed with nano-TiO2 increased spontaneous movement at 24 hpf, co-exposure decreased touch response at 30 hpf and hatching rate at 60 hpf. Consistent with these motor deficits, co-exposure to BP3 and nano-TiO2 inhibited relative axon length of primary motor neuron during the early developmental stages, disturbed the expression of axonal growth-related genes at 30 and 48 hpf, increased cell apoptosis on the head region and mRNA levels of apoptosis-related genes, and also increased reactive oxygen species (ROS) levels in zebrafish, suggesting the functional relevance of structural changes. Taken together, our findings demonstrated that BP3 alone or in combination with nano-TiO2 at environmentally relevant concentrations induced evident neurotoxic effects on the developing embryos in zebrafish.
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Affiliation(s)
- Xiaowei Sun
- School of Public Health, the key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Qinyuan Yang
- School of Public Health, the key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Min Jing
- School of Public Health, the key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Xinrui Jia
- School of Public Health, the key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Linxuan Tian
- School of Public Health, the key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Junyan Tao
- School of Public Health, the key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China.
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37
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Patel N, Ivantsova E, Konig I, Souders CL, Martyniuk CJ. Perfluorotetradecanoic Acid (PFTeDA) Induces Mitochondrial Damage and Oxidative Stress in Zebrafish ( Danio rerio) Embryos/Larvae. TOXICS 2022; 10:776. [PMID: 36548609 PMCID: PMC9785682 DOI: 10.3390/toxics10120776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Industrial and consumer products, such as pesticides, lubricants, and cosmetics, can contain perfluorinated compounds (PFCs). Although many short-chain PFCs have been linked to physiological and behavioral changes in fish, there are limited data on longer-chain PFCs. The objective of this study was to determine the potential impact of perfluorotetradecanoic acid (PFTeDA) exposure on zebrafish (Danio rerio) during early developmental stages. We measured several endpoints including gene expression, mitochondrial bioenergetics, and locomotor activity in zebrafish. Survival, timing of hatching, and deformity frequency were unaffected by PFTeDA at the concentrations tested (0.01, 0.1, 1, and 10 µM) over a 7-day exposure period. The expression levels of mitochondrial-related genes (cox1 and mt-nd3) and oxidative stress-related genes (cat, hsp70, and hsp90a) were increased in larval fish with exposure to 10 µM PFTeDA; however, there was no change in oxidative respiration of embryos (i.e., basal respiration and oligomycin-induced ATP-linked respiration). Reactive oxygen species were reduced in larvae treated with 10 µM PFTeDA, coinciding with the increased transcription of antioxidant defense genes. Both the visual motor response test and light-dark preference test were conducted on 7 dpf larvae and yielded no significant findings. This study improves current knowledge regarding toxicity mechanisms for longer-chain PFCs such as PFTeDA.
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Affiliation(s)
- Neep Patel
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Emma Ivantsova
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Isaac Konig
- Department of Chemistry, Federal University of Lavras (UFLA), Lavras 37200-900, Brazil
| | - Christopher L. Souders
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Christopher J. Martyniuk
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
- UF Genetics Institute, Interdisciplinary Program in Biomedical Sciences, Neuroscience, University of Florida, Gainesville, FL 32611, USA
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38
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Satbhai K, Vogs C, Crago J. Comparative toxicokinetics and toxicity of PFOA and its replacement GenX in the early stages of zebrafish. CHEMOSPHERE 2022; 308:136131. [PMID: 36007738 DOI: 10.1016/j.chemosphere.2022.136131] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 07/06/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
PER: and poly-fluoroalkyl substances (PFAS) are receiving attention due to their persistence, and potential adverse effects on environmental and human health. Efforts to reduce long-chained PFAS (≥C8) compounds were implemented in 2006 as a part of "PFOA Stewardship Program Initiative" (PFOA-perfluorooctanoic acid). Short-chained PFAS (<C8) were introduced as replacements, which were believed to have lower potential for environmental persistence and bioaccumulation. Little is known about the uptake and elimination, and potential toxic effects of these replacement compounds. Hence, it is important to compare toxicokinetics and toxicity of long-chain PFAS to their replacement compounds. To this end, zebrafish (ZF), Danio rerio, embryos were exposed to PFOA and its short-chain replacement perfluoro (2-methyl-3-oxahexanoic) acid (GenX) with the aim to assess uptake and elimination kinetics, hatching success, morphology, startle response, and survival. At 24 hpf, LC50 was 82 μM for PFOA and 170 μM for GenX. At 54 hpf, GenX but not PFOA showed an increase in hatching success. At 120 hpf, no statistically significant differences were seen in white light startle response below the LC50. PFAS internal concentrations were measured at 72 and 120 hpf during exposure phase, and at 168 hpf during depuration phase. GenX and PFOA internal concentrations in 120 hpf larvae exposed to highest concentration (20 μM) were 35.02 and 44.51 μM, respectively. Concentrations were eliminated almost completely at 168 hpf for GenX up to 95%, while for PFOA up to 50%. As steady-state was not reached, we estimated kinetic bioconcentration factors (BCFkin). BCFkin for GenX was lower than PFOA at equimolar concentrations. However, bioconcentration factors were higher at the lower exposure concentrations for both chemicals, suggesting a concentration-dependent uptake of PFASs. The predicted internal effect concentrations, accounting for the differences in bioconcentration factors, were 229 μM for GenX and 226 μM for PFOA, suggesting similar toxic potencies.
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Affiliation(s)
- Kruuttika Satbhai
- Department of Environmental Toxicology, Texas Tech University, Lubbock, TX, USA
| | - Carolina Vogs
- Department of Biomedical Science and Veterinary Public Health, Swedish University of Agricultural Science - SLU, Uppsala, Sweden; Institute of Environmental Medicine, Karolinska Institutet-KI, Stockholm, Sweden
| | - Jordan Crago
- Department of Environmental Toxicology, Texas Tech University, Lubbock, TX, USA.
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39
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Seizurogenic effect of perfluorooctane sulfonate in zebrafish larvae. Neurotoxicology 2022; 93:257-264. [DOI: 10.1016/j.neuro.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 10/03/2022] [Accepted: 10/10/2022] [Indexed: 11/07/2022]
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Coy CO, Steele AN, Abdulelah SA, Belanger RM, Crile KG, Stevenson LM, Moore PA. Differing behavioral changes in crayfish and bluegill under short- and long-chain PFAS exposures: Field study in Northern Michigan, USA. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 247:114212. [PMID: 36274321 DOI: 10.1016/j.ecoenv.2022.114212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 10/16/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
The emergent contaminant family, per- and poly-fluorinated alkyl substances (PFAS) has gained research attention due to their widespread detection and stability within the environment. Despite the growing amount of research on perfluorooctanesulfonic acid (PFOS) and perfluoro-n-octanoic acid (PFOA) in aquatic organisms, investigations detailing behavioral and physiological effects of aquatic organisms exposed to a mixture of PFAS analytes in the wild have been limited. The objective of this study was to evaluate the potential behavioral and histological effects of environmental exposure to PFAS compounds within multiple trophic levels of aquatic ecosystems. The current study investigates effects of environmentally relevant PFAS concentration exposures in crayfish (Faxonius immunis, F. rusticus, F. virilis) and bluegill (Lepomis macrochirus) sourced from four water bodies in Northern Michigan. Antipredator response and foraging behavioral assays were used to investigate potential effects on crayfish; a swimming speed behavioral assay and liver and gill histology analysis were used to investigate potential effects on fish. Linear mixed model and multiple regression analyses resulted in significant relationships between tissue accumulation levels of long chain PFAS compounds and crayfish foraging and fish critical swimming speed responses. Crayfish foraging decreased and fish critical swim speeds increased with PFAS exposure which may lead to energetic and population concerns. Antipredator response in crayfish and liver and gill histology in fish were not significantly related to PFAS tissue or water concentrations. The sensitivity of crayfish and bluegill behavior contributes to the growing body of research regarding the differential toxicity of short-chain and long-chain PFAS compounds. The sensitivity of some aquatic organism behaviors to PFAS accumulated in tissue may have implications for PFAS transfer and alterations to ecosystem functioning; based on the results of this field study, further laboratory research is recommended to further evaluate these relationships.
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Affiliation(s)
- Carrie O Coy
- Laboratory for Sensory Ecology, Bowling Green State University, Department of Biological Sciences, 226 Life Sciences Building, Bowling Green, OH 43403, USA; University of Michigan Biological Station, 9133 Biological Road, Pellston, MI 49769, USA.
| | | | - Sara A Abdulelah
- Biology Department, University of Detroit Mercy, 4001 W. McNichols Road, Detroit, MI 48221, USA.
| | - Rachelle M Belanger
- Biology Department, University of Detroit Mercy, 4001 W. McNichols Road, Detroit, MI 48221, USA.
| | - Karen G Crile
- Biology Department, University of Detroit Mercy, 4001 W. McNichols Road, Detroit, MI 48221, USA.
| | - Louise M Stevenson
- Biodiversity and Ecosystem Health Group, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831, USA; Department of Biological Sciences, Bowling Green State University, 217 Life Sciences Building, Bowling Green, OH 43403, USA.
| | - Paul A Moore
- Laboratory for Sensory Ecology, Bowling Green State University, Department of Biological Sciences, 226 Life Sciences Building, Bowling Green, OH 43403, USA; University of Michigan Biological Station, 9133 Biological Road, Pellston, MI 49769, USA.
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41
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Wang X, Shi X, Zheng S, Zhang Q, Peng J, Tan W, Wu K. Perfluorooctane sulfonic acid (PFOS) exposures interfere with behaviors and transcription of genes on nervous and muscle system in zebrafish embryos. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 848:157816. [PMID: 35931148 DOI: 10.1016/j.scitotenv.2022.157816] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 07/30/2022] [Accepted: 07/31/2022] [Indexed: 02/05/2023]
Abstract
Perfluorooctane sulfonic acid (PFOS) has been widely detected in environment and organisms. PFOS has been identified as the driving agent for the behavioral changes of zebrafish larvae, while the underlying molecular mechanism remains unclear. In this study, zebrafish embryos/larvae were exposed to 0, 0.04, 0.1, 0.4 and 1 μM PFOS for 166 h. The locomotor behaviors and the mRNA transcription of genes in neuromuscular system were detected. Exposure to PFOS did not affect the hatching/death rates and body length, but increased the heart beat rates and frequency of spontaneous tail coiling. Locomotor behavior in zebrafish larvae of 0.4 and 1 μM PFOS groups were increased in the light condition. Additionally, the levels of acetylcholine (Ach) in 0.4 μM PFOS group and dopamine (DA) in 0.1, 0.4 and 1 μM PFOS groups were found to be significantly increased. The expression of genes related to the synthesis and decomposition of ACh,the synthesis and receptor of DA, and fosab was increased in the different PFOS treatment groups, while the expression of all the other genes of the neuromuscular system were significantly reduced. The findings of this investigation demonstrated that PFOS exposure may alter the locomotor behavior of zebrafish through disrupting the expressions of genes in neuromuscular system. The disturbed process of neurotransmitter transmission and muscle contraction caused by PFOS may be the dominant mechanism of hyperactivity in zebrafish.
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Affiliation(s)
- Xin Wang
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, Guangdong, China; Medical Record Statistics Office, The First Affiliated Hospital of Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Xiaoling Shi
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Shukai Zheng
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Qiong Zhang
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Jiajun Peng
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Wei Tan
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, Guangdong, China
| | - Kusheng Wu
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, Guangdong, China
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Lindqvist D, Wincent E. Kinetics and toxicity of an environmentally relevant mixture of halogenated organic compounds in zebrafish embryo. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 252:106311. [PMID: 36201873 DOI: 10.1016/j.aquatox.2022.106311] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 08/04/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Persistent and semi-persistent halogenated compounds cause health problems for the animals occupying the upper level of the food web in the Baltic Sea. Atlantic salmon (Salmo salar), being a top piscivore in the Baltic Sea, has been observed to carry a large body burden of halogenated toxins. Here, a mixture of nine halogenated compounds belonging to different groups was created, based on the observed composition of halogenated toxins in salmon serum. The toxicokinetic properties of the compounds were studied in zebrafish (Danio rerio) embryos to achieve the same proportions between the internal doses of the compounds in the zebrafish as in the salmon. Toxicity was evaluated for the compounds dosed individually as well as in a mixture. Perfluorooctanesulfonic acid (PFOS) was the dominant compound in the salmon and was observed to be the driving force for effects on swimbladder inflation caused by the mixture with a 50% effect concentration of 4.8 µM nominal dose, or 1300 µMD based on the area under the internal concentration-time curve (AUC). The driving compound for other severe effects caused by the mixture, including lethality, spinal deformity, and edemas, was the hydroxylated polybrominated diphenyl ether 6-OH-BDE47, which was observed to have a 50% lethality concentration of 93 nM, corresponding to 94 µMD based on internal dose (AUC). The individual compounds were observed to act additively on most of the documented outcomes when dosed as a mixture.
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Affiliation(s)
- Dennis Lindqvist
- Department of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden; Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden.
| | - Emma Wincent
- Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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Belek N, Erkmen B, Dinçel AS, Gunal AC. Does persistent organic pollutant PFOS (perfluorooctane sulfonate) negative impacts on the aquatic invertebrate organism, Astacus leptodactylus [Eschscholtz, 1823]. ECOTOXICOLOGY (LONDON, ENGLAND) 2022; 31:1217-1230. [PMID: 36065033 DOI: 10.1007/s10646-022-02579-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Highly persistent perfluorooctane sulfonate (PFOS) is an industrial fluorinated organic chemical with significant bioaccumulation and biomagnification properties. The purpose of this study was to determine the toxic effects of sublethal PFOS on the aquatic invertebrate organism, narrow-clawed crayfish [Astacus leptodactylus Eschscholtz, 1823]. The 96 h LC50 value was determined as 48.81 mg/L (34.19-63.68 mg/L) with probit analysis. The sublethal experimental design was formed into four groups solvent control (DMSO, dimethyl sulphoxide), non-treated control group, and 1/10 (5 mg/L) and 1/100 (0.5 mg/L) of 96 h LC50 of PFOS, and crayfish were exposed for 48 h, 7 d, and 21 d under laboratory conditions. Total haemocyte counts (THCs) decreased, while the haemolymph total antioxidant status (TAS) values increased (p < 0.05) after exposure to 0.5 and 5 mg/L PFOS for 48 h, 7 d, and 21 d. Haemolymph total oxidative stress (TOS) levels significantly increased at 5 mg/L PFOS concentration (p < 0.05). Catalase (CAT) activities increased at both concentrations after 48 h and 7 d and then returned to control levels after 21 d; whereas superoxide dismutase (SOD) and glutathione peroxidase (GPX) activities did not change in muscle tissue (p > 0.05). GPX and CAT activities decreased, but SOD activity increased in hepatopancreas tissue (p < 0.05). SOD activity at both concentrations and CAT activity at 5 mg/L PFOS exposure decreased in gill tissue, while GPX activity increased at both concentrations of 48 h and 7 d and returned to control values on day 21 of exposure. Histopathological alterations were detected in hepatopancreas and gill tissues. Lamellar deformations, epithelial hyperplasia, and haemocytic infiltrations were observed in the gill tissues, whereas tubular degeneration, tubule loss, necrosis, and lesions in the hepatopancreas tissues were the major recorded alterations. As a result, the sublethal concentrations of PFOS have toxic effects on crayfish and histologically cause tissue damage. Our findings also support a better understanding of the early toxicological effects of PFOS in freshwater ecosystems. Also, it could be concluded that A. leptodactylus is a reliable model for examining histopathological alterations and differences in enzyme activities together with the haemolymph findings in toxicology studies amid aquatic species.
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Affiliation(s)
- Nesli Belek
- Department of Environmental Sciences, Graduate School of Natural and Applied Sciences, Gazi University, Ankara, Turkey
| | - Belda Erkmen
- Department of Biology, Faculty of Science and Letters, Aksaray University, 68100, Ankara, Turkey
| | - Aylin Sepici Dinçel
- Department of Medical Biochemistry, Faculty of Medicine, Gazi University, 06510, Ankara, Turkey
| | - Aysel Caglan Gunal
- Department of Biology Education, Faculty of Gazi Education, Gazi University, Teknikokullar, Ankara, Turkey.
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Warner RM, Sweeney LM, Hayhurst BA, Mayo ML. Toxicokinetic Modeling of Per- and Polyfluoroalkyl Substance Concentrations within Developing Zebrafish ( Danio rerio) Populations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:13189-13199. [PMID: 36055240 PMCID: PMC9494737 DOI: 10.1021/acs.est.2c02942] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 08/17/2022] [Accepted: 08/19/2022] [Indexed: 05/23/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are pervasive environmental contaminants, and their relative stability and high bioaccumulation potential create a challenging risk assessment problem. Zebrafish (Danio rerio) data, in principle, can be synthesized within a quantitative adverse outcome pathway (qAOP) framework to link molecular activity with individual or population level hazards. However, even as qAOP models are still in their infancy, there is a need to link internal dose and toxicity endpoints in a more rigorous way to further not only qAOP models but adverse outcome pathway frameworks in general. We address this problem by suggesting refinements to the current state of toxicokinetic modeling for the early development zebrafish exposed to PFAS up to 120 h post-fertilization. Our approach describes two key physiological transformation phenomena of the developing zebrafish: dynamic volume of an individual and dynamic hatching of a population. We then explore two different modeling strategies to describe the mass transfer, with one strategy relying on classical kinetic rates and the other incorporating mechanisms of membrane transport and adsorption/binding potential. Moving forward, we discuss the challenges of extending this model in both timeframe and chemical class, in conjunction with providing a conceptual framework for its integration with ongoing qAOP modeling efforts.
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Affiliation(s)
- Ross M. Warner
- Oak
Ridge Institute for Science and Education, Oak Ridge, Tennessee 37830, United States
- Environmental
Laboratory, US Army Engineer Research and
Development Center, Vicksburg, Mississippi 39180, United States
| | - Lisa M. Sweeney
- UES,
Inc., assigned to US Air Force Research Laboratory, Wright-Patterson
Air Force Base, Dayton, Ohio 45432, United
States
| | - Brett A. Hayhurst
- Environmental
Laboratory, US Army Engineer Research and
Development Center, Vicksburg, Mississippi 39180, United States
- Department
of Natural Resources and the Environment, Cornell University, Ithaca, New York 14853, United States
| | - Michael L. Mayo
- Environmental
Laboratory, US Army Engineer Research and
Development Center, Vicksburg, Mississippi 39180, United States
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Pozo K, Moreira LB, Karaskova P, Přibylová P, Klánová J, de Carvalho MU, Maranho LA, de Souza Abessa DM. Using large amounts of firefighting foams releases per- and polyfluoroalkyl substances (PFAS) into estuarine environments: A baseline study in Latin America. MARINE POLLUTION BULLETIN 2022; 182:113938. [PMID: 35905702 DOI: 10.1016/j.marpolbul.2022.113938] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
We analyzed per- and polyfluoroalkyl substances (PFAS) in aqueous film-forming foams (AFFFs) used to extinguish a major fire in a petrochemical terminal from the Port of Santos (Brazil). Eight AFFFs from seven known commercial brands and one unknown sample (AFFF-1 to AFFF-8) were evaluated. 17 PFAS were identified and quantified using high performance liquid chromatography (LC/MS). The concentrations of Σ17 PFAS in the AFFFs ranged from 500 to 9000 ng/g, with prevalence of short chain PFAS (~85 %), followed by long chain PFAS. Perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA), included in the global treaty of the Stockholm Convention, were also detected. We estimated that at least 635.96 g of PFAS were introduced in the estuary, representing a massive input of these substances. This investigation reports the PFAS composition of AFFFs used in firefighting in the GRULAC Region (Group of Latin American and Caribbean countries).
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Affiliation(s)
- Karla Pozo
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic; Facultad de Ingeniería, Arquitectura y Diseño, Universidad San Sebastián, Concepción, Chile
| | - Lucas Buruaem Moreira
- Research Group on Pollution and Aquatic Ecotoxicology, NEPEA, Biosciences Institute, São Paulo State University, Praça Infante Dom Henrique, 11330-900 São Vicente, SP, Brazil
| | - Pavlina Karaskova
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
| | - Petra Přibylová
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
| | - Jana Klánová
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
| | - Maysa Ueda de Carvalho
- Research Group on Pollution and Aquatic Ecotoxicology, NEPEA, Biosciences Institute, São Paulo State University, Praça Infante Dom Henrique, 11330-900 São Vicente, SP, Brazil
| | - Luciane Alves Maranho
- Research Group on Pollution and Aquatic Ecotoxicology, NEPEA, Biosciences Institute, São Paulo State University, Praça Infante Dom Henrique, 11330-900 São Vicente, SP, Brazil
| | - Denis Moledo de Souza Abessa
- Research Group on Pollution and Aquatic Ecotoxicology, NEPEA, Biosciences Institute, São Paulo State University, Praça Infante Dom Henrique, 11330-900 São Vicente, SP, Brazil.
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Chen Q, Sun S, Mei C, Zhao J, Zhang H, Wang G, Chen W. Capabilities of bio-binding, antioxidant and intestinal environmental repair jointly determine the ability of lactic acid bacteria to mitigate perfluorooctane sulfonate toxicity. ENVIRONMENT INTERNATIONAL 2022; 166:107388. [PMID: 35809485 DOI: 10.1016/j.envint.2022.107388] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/26/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
Perfluorooctane sulfonate (PFOS) is a novel environmental contaminant that can be enriched in humans through the food chain, causing liver diseases, neurotoxicity and metabolic disorders. Lactic acid bacteria (LAB) are safe food-grade microorganisms that exhibit high antioxidant activity and bio-binding capacity towards toxins. Here, strains of LAB with different PFOS binding capacities and antioxidant activities were selected and analyzed for their ability in mitigating the toxic effects of PFOS. The results showed that the PFOS binding capacity and antioxidant activity of LAB largely influenced their ability in alleviating the toxic effects of PFOS. Notably, the individual LAB strains with low PFOS binding capacities and antioxidant activities also attenuated the toxic effects of PFOS, which was shown to up-regulate the contents of short-chain fatty acids (SCFAs) in the cecum and of tight junction proteins in the intestines of mice. Therefore, the mitigation pathway of PFOS-induced toxic damage by LAB is not limited to bio-binding and antioxidant. Repairing the gut environment damaged by PFOS is also essential for LAB to alleviate the toxic damage due to PFOS and may be partly independent of the bio-binding and antioxidant. Therefore, LAB as an alternative pathway for alleviating PFOS toxicity is suggested.
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Affiliation(s)
- Qian Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Shanshan Sun
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Chunxia Mei
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, PR China; (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou 225004, PR China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, PR China; (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou 225004, PR China; Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch, Wuxi 214122, PR China
| | - Gang Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, PR China; (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou 225004, PR China.
| | - Wei Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, PR China
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Fey ME, Goodrum PE, Razavi NR, Whipps CM, Fernando S, Anderson JK. Is Mixtures' Additivity Supported by Empirical Data? A Case Study of Developmental Toxicity of PFOS and 6:2 FTS in Wildtype Zebrafish Embryos. TOXICS 2022; 10:toxics10080418. [PMID: 35893851 PMCID: PMC9329885 DOI: 10.3390/toxics10080418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/17/2022] [Accepted: 07/19/2022] [Indexed: 12/10/2022]
Abstract
Per- and polyfluoroalkyl substances (PFASs) are a major priority for many federal and state regulatory agencies charged with monitoring levels of emerging contaminants in environmental media and setting health-protective benchmarks to guide risk assessments. While screening levels and toxicity reference values have been developed for numerous individual PFAS compounds, there remain important data gaps regarding the mode of action for toxicity of PFAS mixtures. The present study aims to contribute whole-mixture toxicity data and advance the methods for evaluating mixtures of two key components of aqueous film-forming foams: perfluorooctanesulfonic acid (PFOS), and 6:2 fluorotelomer sulfonic acid (6:2 FTS). Wildtype (AB) zebrafish embryos were exposed to PFOS and 6:2 FTS, both as individual components and as binary mixtures, from 2 to 122 h post-fertilization. Five treatment levels were selected to encompass environmentally relevant exposure levels. Experimental endpoints consisted of mortality, hatching, and developmental endpoints, including swim bladder inflation, yolk sac area, and larval body length. Results from dose-response analysis indicate that the assumption of additivity using conventional points of departure (e.g., NOAEL, LOAEL) is not supported for critical effect endpoints with these PFAS mixtures, and that the interactions vary as a function of the dose range. Alternative methods for quantifying relative potency are proposed, and recommendations for additional investigations are provided to further advance assessments of the toxicity of PFAS mixtures to aquatic organisms.
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Affiliation(s)
- Megan E. Fey
- College of Environmental Science and Forestry, State University of New York, Syracuse, NY 13210, USA; (M.E.F.); (N.R.R.); (C.M.W.)
| | - Philip E. Goodrum
- College of Environmental Science and Forestry, State University of New York, Syracuse, NY 13210, USA; (M.E.F.); (N.R.R.); (C.M.W.)
- GSI Environmental Inc., Austin, TX 78759, USA;
- Correspondence: ; Tel.: +1-315-396-6655
| | - N. Roxanna Razavi
- College of Environmental Science and Forestry, State University of New York, Syracuse, NY 13210, USA; (M.E.F.); (N.R.R.); (C.M.W.)
| | - Christopher M. Whipps
- College of Environmental Science and Forestry, State University of New York, Syracuse, NY 13210, USA; (M.E.F.); (N.R.R.); (C.M.W.)
| | - Sujan Fernando
- Center for Air and Aquatic Resources Engineering and Science (CAARES), Clarkson University, Potsdam, NY 13699, USA;
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Nilén G, Obamwonyi OS, Liem-Nguyen V, Engwall M, Larsson M, Keiter SH. Observed and predicted embryotoxic and teratogenic effects of organic and inorganic environmental pollutants and their mixtures in zebrafish (Danio rerio). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 248:106175. [PMID: 35523058 DOI: 10.1016/j.aquatox.2022.106175] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
Risk assessment of chemicals is still primarily focusing on single compound evaluation, even if environmental contamination consists of a mixture of pollutants. The concentration addition (CA) and independent action (IA) models have been developed to predict mixture toxicity. Both models assume no interaction between the components, resulting in an additive mixture effect. In the present study, the embryo toxicity test (OECD TG no. 236) with zebrafish embryos (Danio rerio) was performed to investigate whether the toxicity caused by binary, ternary, and quaternary mixtures of organic (Benzo[a]pyrene, perfluorooctanesulfonate, and 3,3´,4,4´,5-pentachlorobiphenyl 126) and inorganic (arsenate) pollutants can be predicted by CA and IA. The acute toxicity and sub-lethal alterations such as lack of blood circulation were investigated. The models estimated the mixture toxicity well and most of the mixtures were additive. However, the binary mixture of PFOS and PCB126 caused a synergistic effect, with almost a ten-fold difference between the observed and predicted LC50-value. For most of the mixtures, the CA model was better in predicting the mixture toxicity than the IA model, which was not expected due to the chemicals' different modes of action. In addition, some of the mixtures caused sub-lethal effects not observed in the single compound toxicity tests. The mixture of PFOS and BaP caused a division of the yolk and imbalance was caused by the combination of PFOS and As and the ternary mixture of PFOS, As, and BaP. Interestingly, PFOS was part of all three mixtures causing the mixture specific sub-lethal effects. In conclusion, the present study shows that CA and IA are mostly resulting in good estimations of the risks that mixtures with few components are posing. However, for a more reliable assessment and a better understanding of mixture toxicity, further investigations are required to study the underlying mechanisms.
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Affiliation(s)
- Greta Nilén
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University, Fakultetsgatan 1, S-701 82 Örebro, Sweden.
| | - Osagie S Obamwonyi
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University, Fakultetsgatan 1, S-701 82 Örebro, Sweden; University of Duisburg-Essen, Forsthausweg 2, 47057 Duisburg, Germany
| | - Van Liem-Nguyen
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University, Fakultetsgatan 1, S-701 82 Örebro, Sweden
| | - Magnus Engwall
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University, Fakultetsgatan 1, S-701 82 Örebro, Sweden
| | - Maria Larsson
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University, Fakultetsgatan 1, S-701 82 Örebro, Sweden
| | - Steffen H Keiter
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University, Fakultetsgatan 1, S-701 82 Örebro, Sweden
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Multi- and Transgenerational Effects of Developmental Exposure to Environmental Levels of PFAS and PFAS Mixture in Zebrafish ( Danio rerio). TOXICS 2022; 10:toxics10060334. [PMID: 35736942 PMCID: PMC9228135 DOI: 10.3390/toxics10060334] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 06/10/2022] [Accepted: 06/17/2022] [Indexed: 02/01/2023]
Abstract
Per- and polyfluoroalkyl substances (PFASs) are ubiquitous in the environment and are tied to myriad health effects. Despite the phasing out of the manufacturing of two types of PFASs (perfluorosulfonic acid (PFOS) and perfluorooctanoic acid (PFOA)), chemical composition renders them effectively indestructible by ambient environmental processes, where they thus remain in water. Exposure via water can affect both human and aquatic wildlife. PFASs easily cross the placenta, exposing the fetus at critical windows of development. Little is known about the effects of low-level exposure during this period; even less is known about the potential for multi- and transgenerational effects. We examined the effects of ultra-low, very low, and low-level PFAS exposure (7, 70, and 700 ng/L PFOA; 24, 240, 2400 ng/L PFOS; and stepwise mixtures) from 0–5 days post-fertilization (dpf) on larval zebrafish (Danio rerio) mortality, morphology, behavior and gene expression and fecundity in adult F0 and F1 fish. As expected, environmentally relevant PFAS levels did not affect survival. Morphological abnormalities were not observed until the F1 and F2 generations. Behavior was affected differentially by each chemical and generation. Gene expression was increasingly perturbed in each generation but consistently showed lipid pathway disruption across all generations. Dysregulation of behavior and gene expression is heritable, even in larvae with no direct or indirect exposure. This is the first report of the transgenerational effects of PFOA, PFOS, and their mixture in terms of zebrafish behavior and untargeted gene expression.
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Liu S, Wang L, Chen K, Yang H, Ling M, Wu L, Zhou X, Ma G, Bai L. Combined effects of S-metolachlor and benoxacor on embryo development in zebrafish (Danio rerio). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 238:113565. [PMID: 35512469 DOI: 10.1016/j.ecoenv.2022.113565] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 04/19/2022] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
It is necessary to study the combined toxicity of an herbicide and its safener because the two are often used in combination. S-metolachlor and its safener benoxacor have been detected in aquatic environments and can individually damage the oxidative stress system in zebrafish embryos (Danio rerio). However, only their separate toxicity in zebrafish (Danio rerio) embryo development has been reported. This study assessed the combined toxicity of benoxacor and S-metolachlor in zebrafish embryo development, including acute toxicity, developmental toxicity, oxidative damage, and cell apoptosis. The 96-h LC50 values were higher in mixtures of benoxacor and S-metolachlor than in benoxacor alone. The treatments included S-metolachlor, Mix-1 (0.1 mg/L benoxacor + 0.1 mg/L S-metolachlor), Mix-2 (0.1 mg/L benoxacor + 0.3 mg/L S-metolachlor) and benoxacor alone. Embryos exposed to Mix-1 and Mix-2 had lower developmental toxicities, superoxide dismutase (SOD) activity, osx and cat expression levels than those exposed to benoxacor alone. Moreover, glutathione S-transferase (GST), catalase (CAT), glutathione reductase (GR), glutathione peroxidase (GPx) activities, and the expressions of tbx16, nrf2, bcl2, and caspase9 were higher in the mixtures than in the benoxacor group. High-throughput RNA sequencing revealed that benoxacor had a greater effect on gene regulation than Mix-1 and Mix-2. The malformation rate, different enrichment gene numbers, and gene expression levels of hatched embryos were higher in Mix-1 than in Mix-2. The results indicate that a mixture of S-metolachlor and benoxacor has antagonistic effects in the early stage of embryo development. The mixtures can break the reactive oxygen species balance, causing abnormal cell apoptosis and developmental malformation in embryos. Besides investigating the combined toxicity of benoxacor and S-metolachlor in zebrafish embryo development, this study provides a risk assessment basis for a herbicide combined with its safener.
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Affiliation(s)
- Sihong Liu
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China
| | - Lifeng Wang
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China.
| | - Ke Chen
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China
| | - Haona Yang
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China
| | - Min Ling
- Hunan Research Academy of Environmental Sciences, Changsha, PR China
| | - Lamei Wu
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China
| | - Xiaomao Zhou
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China
| | - Guolan Ma
- State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha, PR China
| | - Lianyang Bai
- Hunan Weed Science Key Laboratory, Hunan Academy of Agricultural Sciences, Changsha, PR China; State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha, PR China; Longping Branch, Graduate School of Hunan University, Changsha, PR China.
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