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Moma M, Lee A, Olson MB, Lemkau KL, Cooper WJ. The Impact of Polychlorinated Biphenyls on the Development of Zebrafish ( Danio rerio). Biomedicines 2024; 12:2068. [PMID: 39335581 PMCID: PMC11429354 DOI: 10.3390/biomedicines12092068] [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: 06/29/2024] [Revised: 08/27/2024] [Accepted: 08/31/2024] [Indexed: 09/30/2024] Open
Abstract
Polychlorinated biphenyls (PCBs) are a group of 209 highly stable molecules that were used extensively in industry. Although their commercial use ceased in 1979, they are still present in many aquatic ecosystems due to improper disposal, oceanic currents, atmospheric deposition, and hydrophobic nature. PCBs pose a significant and ongoing threat to the development and sustainability of aquatic organisms. In areas with PCB exposure high mortality rates of organisms inhabiting them are still seen today, posing a significant threat to local species. Zebrafish were exposed to a standard PCB mixture (Aroclor 1254) for the first 5 days post fertilization, as there is a gap in knowledge during this important developmental period for fish (i.e., organization of the body). This PCB mixture was formally available commercially and has a high prevalence in PCB-contaminated sites. We tested for the effects of PCB dosage (control (embryo water only; 0 mg/L), methanol (solvent control; 0 mg/L); PCB 1 (0.125 mg/L), PCB 2 (0.25 mg/L), PCB 3 (0.35 mg/L), and PCB 4 (0.40 mg/L)) on zebrafish survival, rate of metamorphosis, feeding efficiency, and growth. We found significant, dose-dependent effects of PCB exposure on mortality, feeding efficiency, and growth, but no clear effect of PCBs on the rate of zebrafish metamorphosis. We identified a concentration in which there were no observable effects (NOEC), PCB concentration above the NOEC had a significant impact on life-critical processes. This can further inform local management decisions in environments experiencing PCB contamination.
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Affiliation(s)
- Megan Moma
- Biology Department, Western Washington University, 516 High St., Bellingham, WA 98225, USA
| | - Abi Lee
- Biology Department, Western Washington University, 516 High St., Bellingham, WA 98225, USA
- Marine and Coastal Science Program, Western Washington University, 516 High St., Bellingham, WA 98225, USA
| | - M Brady Olson
- Biology Department, Western Washington University, 516 High St., Bellingham, WA 98225, USA
- Marine and Coastal Science Program, Western Washington University, 516 High St., Bellingham, WA 98225, USA
| | - Karin L Lemkau
- Marine and Coastal Science Program, Western Washington University, 516 High St., Bellingham, WA 98225, USA
- Chemistry Department, Western Washington University, 516 High St., Bellingham, WA 98225, USA
| | - W James Cooper
- Biology Department, Western Washington University, 516 High St., Bellingham, WA 98225, USA
- Marine and Coastal Science Program, Western Washington University, 516 High St., Bellingham, WA 98225, USA
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Campioni L, Oró-Nolla B, Granadeiro JP, Silva MC, Madeiros J, Gjerdrum C, Lacorte S. Exposure of an endangered seabird species to persistent organic pollutants: Assessing levels in blood and link with reproductive parameters. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172814. [PMID: 38679096 DOI: 10.1016/j.scitotenv.2024.172814] [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: 01/17/2024] [Revised: 04/23/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
Ocean contamination, particularly from persistent organic pollutants (POPs), remains a significant threat to marine predators that occupy high trophic positions. Long-lived procellariform seabirds are apex predators in marine ecosystems and tend to accumulate contaminants. Prolonged exposure to pollutants negatively affects their fitness including reproductive success. Low breeding success may represent a hurdle for the restoration of small and endangered seabird populations, including several highly threatened gadfly petrels. Here we investigated the annual variation (2019 and 2022) in organochlorine pesticide (OCP), polychlorinated biphenyl ether (PCB), polybrominated diphenyl ether (PBDE), and polycyclic aromatic hydrocarbon (PAH) exposure in the endangered Bermuda petrel (Pterodroma cahow), and the relationship between female contaminant burden and breeding parameters. We found that petrels were exposed to a wide range of pollutants (33 out of 55 showed measurable levels) with PCBs dominating the blood contaminant profiles in both years. Only 9 compounds were detected in >50 % of the birds. Specifically, among OCPs, p, p'-DDE and hexaclorobenzene were the most frequently detected while fluorene and acenaphthene were the most common PAH. The concentrations of ∑5PCBs and ∑7POPs were higher in older birds. Furthermore, females with greater contaminant burdens laid eggs with a lower probability of hatching. However, female investment in egg production (size and volume) was unrelated to their blood contaminant load. Overall, this study highlights the presence of a wide range of contaminants in the petrel's food web, and it sheds light on the potential impact of chronic exposure to sub-lethal levels of PCBs on the breeding success of seabirds. We claim that toxicological testing should be a practice integrated in the management of seabirds, particularly of endangered species to monitor how past and present anthropogenic activities impact their conservation status.
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Affiliation(s)
- Letizia Campioni
- MARE - Marine and Environmental Sciences Centre, ARNET - Aquatic Research Network, Ispa - Instituto Universitário, 1149-041 Lisboa, Portugal.
| | - Bernat Oró-Nolla
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - José P Granadeiro
- CESAM Centre for Environmental and Marine Studies, Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal
| | - Mónica C Silva
- CE3C- Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências, Universidade de Lisboa, CHANGE - Global Change and Sustainability Institute, Campo Grande, 1749-016 Lisbon, Portugal
| | - Jeremy Madeiros
- Department of Environment and Natural Resources, Ministry of the Environment, PO Box FL588, Flatts, FL BX, Bermuda
| | - Carina Gjerdrum
- Canadian Wildlife Service, Dartmouth, Nova Scotia B2Y 2N6, Canada
| | - Silvia Lacorte
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
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Agarwal M, Roth K, Yang Z, Sharma R, Maddipati K, Westrick J, Petriello MC. Loss of flavin-containing monooxygenase 3 modulates dioxin-like polychlorinated biphenyl 126-induced oxidative stress and hepatotoxicity. ENVIRONMENTAL RESEARCH 2024; 250:118492. [PMID: 38373550 PMCID: PMC11102846 DOI: 10.1016/j.envres.2024.118492] [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: 12/21/2023] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 02/21/2024]
Abstract
Dioxin-like pollutants (DLPs), such as polychlorinated biphenyl 126 (PCB 126), are synthetic chemicals classified as persistent organic pollutants. They accumulate in adipose tissue and have been linked to cardiometabolic disorders, including fatty liver disease. The toxicity of these compounds is associated with activation of the aryl hydrocarbon receptor (Ahr), leading to the induction of phase I metabolizing enzyme cytochrome P4501a1 (Cyp1a1) and the subsequent production of reactive oxygen species (ROS). Recent research has shown that DLPs can also induce the xenobiotic detoxification enzyme flavin-containing monooxygenase 3 (FMO3), which plays a role in metabolic homeostasis. We hypothesized whether genetic deletion of Fmo3 could protect mice, particularly in the liver, where Fmo3 is most inducible, against PCB 126 toxicity. To test this hypothesis, male C57BL/6 wild-type (WT) mice and Fmo3 knockout (Fmo3 KO) mice were exposed to PCB 126 or vehicle (safflower oil) during a 12-week study, at weeks 2 and 4. Various analyses were performed, including hepatic histology, RNA-sequencing, and quantitation of PCB 126 and F2-isoprostane concentrations. The results showed that PCB 126 exposure caused macro and microvesicular fat deposition in WT mice, but this macrovesicular fatty change was absent in Fmo3 KO mice. Moreover, at the pathway level, the hepatic oxidative stress response was significantly different between the two genotypes, with the induction of specific genes observed only in WT mice. Notably, the most abundant F2-isoprostane, 8-iso-15-keto PGE2, increased in WT mice in response to PCB 126 exposure. The study's findings also demonstrated that hepatic tissue concentrations of PCB 126 were higher in WT mice compared to Fmo3 KO mice. In summary, the absence of FMO3 in mice led to a distinctive response to dioxin-like pollutant exposure in the liver, likely due to alterations in lipid metabolism and storage, underscoring the complex interplay of genetic factors in the response to environmental toxins.
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Affiliation(s)
- Manisha Agarwal
- Department of Pharmacology, School of Medicine, Wayne State University, Detroit, MI, 48202, USA; Institute of Environmental Health Sciences, Wayne State University, Detroit, MI, 48202, USA
| | - Katherine Roth
- Institute of Environmental Health Sciences, Wayne State University, Detroit, MI, 48202, USA
| | - Zhao Yang
- Institute of Environmental Health Sciences, Wayne State University, Detroit, MI, 48202, USA
| | - Rahul Sharma
- Institute of Environmental Health Sciences, Wayne State University, Detroit, MI, 48202, USA
| | - Krishnarao Maddipati
- Department of Pathology, Lipidomic Core Facility, Wayne State University, Detroit, MI, 48202, USA
| | - Judy Westrick
- Department of Chemistry, Lumigen Instrumentation Center, Wayne State University, Detroit, MI, 48202, USA
| | - Michael C Petriello
- Department of Pharmacology, School of Medicine, Wayne State University, Detroit, MI, 48202, USA; Institute of Environmental Health Sciences, Wayne State University, Detroit, MI, 48202, USA.
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Agarwal M, Hoffman J, Ngo Tenlep SY, Santarossa S, Pearson KJ, Sitarik AR, Cassidy-Bushrow AE, Petriello MC. Maternal polychlorinated biphenyl 126 (PCB 126) exposure modulates offspring gut microbiota irrespective of diet and exercise. Reprod Toxicol 2023; 118:108384. [PMID: 37061048 PMCID: PMC10257154 DOI: 10.1016/j.reprotox.2023.108384] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/07/2023] [Accepted: 04/12/2023] [Indexed: 04/17/2023]
Abstract
The gut microbiota plays an important role throughout the lifespan in maintaining host health, and several factors can modulate microbiota composition including diet, exercise, and environmental exposures. Maternal microbiota is transferred to offspring during early life; thus, environmental exposures before gestation may also modulate offspring microbiota. Here we aimed to investigate the effects of maternal exposure to dioxin-like polychlorinated biphenyls (PCBs) on the microbiota of aged offspring and to determine if lifestyle factors, including maternal exercise or offspring high-fat feeding alter these associations. To test this, dams were exposed to PCB 126 (0.5 μmole/kg body weight) or vehicle oil by oral gavage during preconception, gestation, and during lactation. Half of each group was allowed access to running wheels for ≥ 7 days before and during pregnancy and up through day 14 of lactation. Female offspring born from the 4 maternal groups (PCB exposure or not, with/without exercise) were subsequently placed either on regular diet or switched to a high-fat diet during adulthood. Microbiota composition was quantified in female offspring at 49 weeks of age by 16 S rRNA sequencing. Maternal exposure to PCB 126 resulted in significantly reduced richness and diversity in offspring microbiota regardless of diet or exercise. Overall compositional differences were largely driven by offspring diet, but alterations in specific taxa due to maternal PCB 126 exposure, included the depletion of Verrucomicrobiaceae and Akkermansia muciniphila, and an increase in Anaeroplasma. Perturbation of microbiota due to PCB 126 may predispose offspring to a variety of chronic diseases later in adulthood.
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Affiliation(s)
- Manisha Agarwal
- Department of Pharmacology, School of Medicine, Wayne State University, Detroit, MI, 48202, USA
| | - Jessie Hoffman
- Department of Human Nutrition, Winthrop University, Rock Hill, SC 29733, USA
| | - Sara Y Ngo Tenlep
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, USA
| | - Sara Santarossa
- Department of Public Health Sciences, Henry Ford Health, Detroit, MI 48202, USA
| | - Kevin J Pearson
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, USA
| | - Alexandra R Sitarik
- Department of Public Health Sciences, Henry Ford Health, Detroit, MI 48202, USA
| | | | - Michael C Petriello
- Department of Pharmacology, School of Medicine, Wayne State University, Detroit, MI, 48202, USA; Institute of Environmental Health Sciences, Wayne State University, Detroit, MI 48202, USA.
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Guerrero-Limón G, Nivelle R, Bich-Ngoc N, Duy-Thanh D, Muller M. A Realistic Mixture of Persistent Organic Pollutants Affects Zebrafish Development, Behavior, and Specifically Eye Formation by Inhibiting the Condensin I Complex. TOXICS 2023; 11:357. [PMID: 37112584 PMCID: PMC10146850 DOI: 10.3390/toxics11040357] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 04/07/2023] [Accepted: 04/07/2023] [Indexed: 06/19/2023]
Abstract
Persistent organic pollutants (POPs) are posing major environmental and health threats due to their stability, ubiquity, and bioaccumulation. Most of the numerous studies of these compounds deal with single chemicals, although real exposures always consist of mixtures. Thus, using different tests, we screened the effects on zebrafish larvae caused by exposure to an environmentally relevant POP mixture. Our mixture consisted of 29 chemicals as found in the blood of a Scandinavian human population. Larvae exposed to this POP mix at realistic concentrations, or sub-mixtures thereof, presented growth retardation, edemas, retarded swim bladder inflation, hyperactive swimming behavior, and other striking malformations such as microphthalmia. The most deleterious compounds in the mixture belong to the per- and polyfluorinated acids class, although chlorinated and brominated compounds modulated the effects. Analyzing the changes in transcriptome caused by POP exposure, we observed an increase of insulin signaling and identified genes involved in brain and eye development, leading us to propose that the impaired function of the condensin I complex caused the observed eye defect. Our findings contribute to the understanding of POP mixtures, their consequences, and potential threats to human and animal populations, indicating that more mechanistic, monitoring, and long-term studies are imperative.
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Affiliation(s)
- Gustavo Guerrero-Limón
- Laboratory for Organogenesis and Regeneration, GIGA Institute, University of Liège, 4000 Liège, Belgium; (G.G.-L.); (R.N.); (D.D.-T.)
| | - Renaud Nivelle
- Laboratory for Organogenesis and Regeneration, GIGA Institute, University of Liège, 4000 Liège, Belgium; (G.G.-L.); (R.N.); (D.D.-T.)
| | - Nguyen Bich-Ngoc
- VNU School of Interdisciplinary Studies, Vietnam National University (VNU), Hanoi 10000, Vietnam;
| | - Dinh Duy-Thanh
- Laboratory for Organogenesis and Regeneration, GIGA Institute, University of Liège, 4000 Liège, Belgium; (G.G.-L.); (R.N.); (D.D.-T.)
| | - Marc Muller
- Laboratory for Organogenesis and Regeneration, GIGA Institute, University of Liège, 4000 Liège, Belgium; (G.G.-L.); (R.N.); (D.D.-T.)
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Wirgin I, Chambers RC, Waldman JR, Roy NK, Witting DA, Mattson MT. Effects of Hudson River Stressors on Atlantic Tomcod: Contaminants and a Warming Environment. REVIEWS IN FISHERIES SCIENCE & AQUACULTURE 2023; 31:342-371. [PMID: 37621745 PMCID: PMC10446889 DOI: 10.1080/23308249.2023.2189483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
The Hudson River (HR) Estuary has a long history of pollution with a variety of contaminants including PCBs, and dioxins. In fact, 200 miles of the mainstem HR is designated a U.S. federal Superfund site, the largest in the nation, because of PCB contamination. The tidal HR hosts the southernmost spawning population of Atlantic tomcod, and studies revealed a correlation between exposure of juveniles to warm water temperature during summer to abundance of spawning adults of the same cohort in the following winter. Further, a battery of mechanistically linked biomarkers, ranging from the molecular to the population levels, were significantly impacted from contaminant exposures of the HR tomcod population. In response to xenobiotic insult, the HR tomcod population developed resistance to PCB sand TCDD toxicity resulting from a deletion in the aryl hydrocarbon receptor2 (AHR2) gene. Furthermore, RNA-Seq analysis of global gene expression demonstrated that effects of the AHR2 polymorphism were far more pervasive than anticipated. The most highly PCB-contaminated sediments in the upper HR were dredged between 2009 and 2015 with the objective of lowering PCB concentrations in fishes in the lower HR. Success of the remediation project has been controversial. These observations suggest that tomcod provides an informative model to evaluate the efficacy of HR PCB remediation efforts on downriver fish populations and possible interactive effects between contaminant exposure and a warming environment.
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Affiliation(s)
- Isaac Wirgin
- Department of Environmental Medicine, New York University School of Medicine, New York, New York
| | | | | | - Nirmal K Roy
- Department of Environmental Medicine, New York University School of Medicine, New York, New York
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Singleman C, Holtzman NG. PCB and TCDD derived embryonic cardiac defects result from a novel AhR pathway. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 233:105794. [PMID: 33662880 DOI: 10.1016/j.aquatox.2021.105794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 01/30/2021] [Accepted: 02/20/2021] [Indexed: 06/12/2023]
Abstract
Polychlorinated biphenyls (PCBs) and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) are environmental contaminants known to impact cardiac development, a key step in the embryonic development of most animals. To date, little is understood of the molecular mechanism driving the observed cardiac defects in exposed fishes. The literature shows PCB & TCDD derived cardiac defects are concurrent with, but not caused by, expression of cyp1A, due to activation of the aryl hydrocarbon receptor (AhR) gene activation pathway. However, in this study, detailed visualization of fish hearts exposed to PCBs and TCDD show that, in addition to a failure of cardiac looping in early heart development, the inner endocardial lining of the heart fails to maintain proper cell adhesion and tissue integrity. The resulting gap between the endocardium and myocardium in both zebrafish and Atlantic sturgeon suggested functional faults in endothelial adherens junction formation. Thus, we explored the molecular mechanism triggering cardiac defects using immunohistochemistry to identify the location and phosphorylation state of key regulatory and adhesion molecules. We hypothesized that PCB and TCDD activates AhR, phosphorylating Src, which then phosphorylates the endothelial adherens junction protein, VEcadherin. When phosphorylated, VEcadherin dimers, found in the endocardium and vasculature, separate, reducing tissue integrity. In zebrafish, treatment with PCB and TCDD contaminants leads to higher phosphorylation of VEcadherin in cardiac tissue suggesting that these cells have reduced connectivity. Small molecule inhibition of Src phosphorylation prevents contaminant stimulated phosphorylation of VEcadherin and rescues both cardiac function and gross morphology. Atlantic sturgeon hearts show parallels to contaminant exposed zebrafish cardiac phenotype at the tissue level. These data suggest that the mechanism for PCB and TCDD action in the heart is, in part, distinct from the canonical mechanism described in the literature and that cardiac defects are impacted by this nongenomic mechanism.
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Affiliation(s)
- Corinna Singleman
- Department of Biology, Queens College, City University of New York, 65-30 Kissena Blvd, Queens NY 11367-1597, USA; The Graduate Center, City University of New York, 365 Fifth Avenue, New York, NY 10016, USA
| | - Nathalia G Holtzman
- Department of Biology, Queens College, City University of New York, 65-30 Kissena Blvd, Queens NY 11367-1597, USA; The Graduate Center, City University of New York, 365 Fifth Avenue, New York, NY 10016, USA.
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