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Toxics
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Effects of Acute Exposure to Toxicants on Oxidative Stress in...
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Effects of Acute Exposure to Toxicants on Oxidative Stress in Aquatic Organisms

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Ecotoxicology".

Deadline for manuscript submissions: closed (28 November 2024) | Viewed by 2903

Special Issue Editors

Dr. Luís Félix

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Guest Editor
Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal
Interests: toxicology; zebrafish; oxidative stress; biochemistry; behavior; development; mitochondria; ecotoxicology
Special Issues, Collections and Topics in MDPI journals
Dr. Davi Farias

E-Mail Website
Guest Editor
Laboratory for Risk Assessment of Novel Technologies, Department of Molecular Biology, Federal University of Paraíba, João Pessoa 58051-900, Brazil
Interests: emerging contaminants; oxidative stress; biomarkers; zebrafish; predictive toxicology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Acute exposure to pollutants or stressors such as heavy metals, pesticides, drugs, and other toxic substances in aquatic environments can markedly affect oxidative stress levels in aquatic organisms. Oxidative stress is defined as an excessive production of free radicals that can impact the structure and activity of essential biological functions through damage to proteins, lipids, and DNA, potentially leading to cell death. However, the effects of oxidative stress are not uniform across all species, with reported species-specific differences in antioxidant capacity. Additionally, several endogenous and exogenous factors can contribute to the excessive production of free radicals. Therefore, studying the effects of acute exposure on oxidative stress in aquatic organisms by assessing different biomarkers (e.g., the levels of lipid peroxides, DNA damage, and antioxidant enzyme activities) is essential for understanding environmental impacts and developing effective conservation strategies.

In this sense, this Special Issue in the Toxics journal is devoted to the recent findings on “Effects of Acute Exposure on Oxidative Stress in Aquatic Organisms”. Consistent with this idea, experts are invited to contribute original research as well as review articles.

The contributions should be focused on new mechanisms and/or new approaches to advance our understanding of the harmful effects of oxidative stress in aquatic ecosystems, thereby helping with the establishment of guidelines for pollutant levels and allowing potential remediation efforts.

Dr. Luís Félix
Dr. Davi Farias
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Toxics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • toxicology
  • oxidative stress
  • antioxidant
  • biomarkers
  • reactive oxygen species
  • oxidative damage
  • redox homeostasis

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Published Papers (2 papers)

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Research

16 pages, 3168 KiB  
Article
Integrated Biomarker Response of Oxidative Stress Parameters in the Digestive Glands and Gills of Autochthonous and Invasive Freshwater Mussels from the Sava River, Serbia
by Slavica Borković-Mitić, Bojan Mitić, Jelena S. Vranković, Katarina Jovičić and Slađan Pavlović
Toxics 2024, 12(10), 756; https://doi.org/10.3390/toxics12100756 - 18 Oct 2024
Cited by 1 | Viewed by 1253
Abstract
In this study, the activity of oxidative stress parameters superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione reductase (GR), and glutathione S-transferase (GST), as well as the concentrations of vitamin E (Vit E) and SH groups in the digestive glands and gills [...] Read more.
In this study, the activity of oxidative stress parameters superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione reductase (GR), and glutathione S-transferase (GST), as well as the concentrations of vitamin E (Vit E) and SH groups in the digestive glands and gills of freshwater mussels Unio pictorum and Sinanodonta woodiana from the Sava River in Serbia were investigated. These parameters were determined in native and invasive mussels under the same environmental conditions. The activities of GSH-Px and GR and the concentration of Vit E were significantly higher in the digestive glands of the autochthonous species U. pictorum than in the invasive species S. woodiana, while the CAT activity and the concentration of SH groups were lower. In the gills of U. pictorum, GSH-Px activity and Vit E concentration were significantly higher, while CAT, GST, and SH groups were lower. Principal component analysis (PCA) showed that oxidative stress parameters were strictly tissue- and species-specific. In addition, integrated biomarker response (IBR) showed a combined response of enzymatic and non-enzymatic oxidative stress parameters depending on the tissue or species studied, indicating different metabolic activities and behaviors of an autochthonous versus an introduced bivalve species. Full article
(This article belongs to the Special Issue Effects of Acute Exposure to Toxicants on Oxidative Stress in Aquatic Organisms)
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15 pages, 3755 KiB  
Article
The Effects of Co-Exposure to Antifoulants and Microplastics on the Survival, Oxidative Status, and Cholinergic System of a Marine Mysid
by Somyeong Lee, Md. Niamul Haque, Do-Hee Lee and Jae-Sung Rhee
Toxics 2024, 12(9), 651; https://doi.org/10.3390/toxics12090651 - 5 Sep 2024
Viewed by 1118
Abstract
Antifoulants such as copper pyrithione (CuPT) and zinc pyrithione (ZnPT) are widespread and hazardous pollutants in aquatic environments. The presence of microplastics (MPs) introduces significant uncertainty regarding the toxicity of CuPT and ZnPT, as their effects can be influenced by MPs. There is [...] Read more.
Antifoulants such as copper pyrithione (CuPT) and zinc pyrithione (ZnPT) are widespread and hazardous pollutants in aquatic environments. The presence of microplastics (MPs) introduces significant uncertainty regarding the toxicity of CuPT and ZnPT, as their effects can be influenced by MPs. There is a limited understanding of the toxic potential of CuPT and ZnPT when they coexist with MPs. Here, the marine mysid Neomysis awatchensis was treated using no observed effect concentration (NOEC) values of CuPT and ZnPT premixed with MPs (1 µm; 1–100 particles mL−1). The presence of MPs increased the toxicity of the antifoulants in juvenile and adult mysids over 96 h. The additive effect of the MPs varied by chemical; feeding was only reduced by CuPT with MPs, whereas no fluctuation in feeding was observed in response to ZnPT with MPs. Co-exposure to antifoulants and MPs increased malonaldehyde levels, but the response of antioxidant components varied by chemical. In mysids co-exposed to CuPT and MPs, the activity levels of catalase and superoxide dismutase were decreased, whereas their enzymatic activity levels were elevated by co-exposure to ZnPT and MPs. Similarly, depletion of glutathione (GSH) was observed in mysids co-exposed to CuPT and MPs, with significant reductions in GSH reductase (GR) and peroxidase (GPx). However, the GSH level was increased by co-exposure to ZnPT and MPs, with elevations in GR and GPx activity levels. Significant inhibition of acetylcholinesterase activity was only observed in response to CuPT and MPs. These results suggest that MPs can increase toxicity via additive and/or synergistic effects through oxidative imbalance, but these effects of MPs can vary with different chemicals. Full article
(This article belongs to the Special Issue Effects of Acute Exposure to Toxicants on Oxidative Stress in Aquatic Organisms)
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