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Santhosh K, Kamala K, Ramasamy P, Musthafa MS, Almujri SS, Asdaq SMB, Sivaperumal P. Unveiling the silent threat: Heavy metal toxicity devastating impact on aquatic organisms and DNA damage. Mar Pollut Bull 2024; 200:116139. [PMID: 38367585 DOI: 10.1016/j.marpolbul.2024.116139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 01/17/2024] [Accepted: 02/06/2024] [Indexed: 02/19/2024]
Abstract
Heavy metal pollution has significant impacts on aquatic fauna and flora. It accumulates in marine organisms, both plants and animals, which are then consumed by humans. This can lead to various health problems, such as organ damage and the development of cancer. Additionally, this pollution causes biological magnification, where the toxicity concentration gradually increases as aquatic organisms continuously accumulate metals. This process results in apoptotic mechanisms, antioxidant defence, and inflammation, which are reflected at the gene expression level. However, there is limited research on specific heavy metals and their effects on fish organs. The concentration of metal contamination and accumulation in different tropical environments is a concern due to their toxicity to living organisms. Therefore, this review focuses on determining the influences of metals on fish and their effects on specific organs, including DNA alterations.
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Affiliation(s)
- Krishnamoorthy Santhosh
- Marine Biomedical Research Lab & Environmental Toxicology Unit, Department of Prosthodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical & Technical Sciences, Saveetha University, Chennai 600077, Tamil Nadu, India
| | - Kannan Kamala
- Department of Physiology, Basic Medical Sciences, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu 600077, India; Centre for Marine Research and Conservation, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu 600077, India
| | - Pasiyappazham Ramasamy
- Marine Biomedical Research Lab & Environmental Toxicology Unit, Department of Prosthodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical & Technical Sciences, Saveetha University, Chennai 600077, Tamil Nadu, India; Centre for Marine Research and Conservation, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu 600077, India
| | - Mohamed Saiyad Musthafa
- Unit of Research in Radiation Biology & Environmental Radioactivity (URRBER), P.G. & Research Department of Zoology, The New College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu 600 014, India
| | - Salem Salman Almujri
- Department of Pharmacology, College of Pharmacy, King Khalid University, Asir-Abha 61421, Saudi Arabia; Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | | | - Pitchiah Sivaperumal
- Marine Biomedical Research Lab & Environmental Toxicology Unit, Department of Prosthodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical & Technical Sciences, Saveetha University, Chennai 600077, Tamil Nadu, India; Centre for Marine Research and Conservation, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu 600077, India.
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Mahapatra A, Gupta P, Suman A, Ray SS, Singh RK. PFOS-induced dyslipidemia and impaired cholinergic neurotransmission in developing zebrafish: Insight into its mechanisms. Neurotoxicol Teratol 2023; 100:107304. [PMID: 37805080 DOI: 10.1016/j.ntt.2023.107304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 07/19/2023] [Accepted: 10/01/2023] [Indexed: 10/09/2023]
Abstract
Perfluorooctane sulfonate (PFOS) is a persistent organic pollutant that has been widely detected in the environment and is known to accumulate in organisms, including humans. The study investigated dose-dependent mortality, hatching rates, malformations, lipid accumulation, lipid metabolism alterations, and impacts on cholinergic neurotransmission. Increasing PFOS concentration led to higher mortality, hindered hatching, and caused concentration-dependent malformations, indicating severe abnormalities in developing zebrafish. The results also demonstrated that PFOS exposure led to a significant increase in total lipids, triglycerides, total cholesterol, and LDL in a concentration-dependent manner, while HDL cholesterol levels were significantly decreased. Additionally, PFOS exposure led to a significant decrease in glucose levels. The study identified TGs, TCHO, and glucose as the most sensitive biomarkers in assessing lipid metabolism alterations. The study also revealed altered expression of genes involved in lipid metabolism, including upregulation of fasn, acaca, and hmgcr and downregulation of ldlr, pparα, and abca1, as well as decreased lipoprotein lipase (LPL) and increased fatty acid synthase (FAS) activity,suggesting an impact on fatty acid synthesis, cholesterol uptake, and lipid transport. Additionally, PFOS exposure led to impaired cholinergic neurotransmission, evidenced by a concentration-dependent inhibition of acetylcholinesterase activity, altered gene expressions related to neural development and function, and reduced Na+/K+-ATPase activity. STRING network analysis highlighted two distinct gene clusters related to lipid metabolism and cholinergic neurotransmission, with potential interactions through the pparα-creb1 pathway. Overall, this study provide important insights into the potential health risks associated with PFOS exposure, including dyslipidemia, cardiovascular disease, impaired glucose metabolism, and neurotoxicity. Further research is needed to fully elucidate the underlying mechanisms and potential long-term effects of PFOS exposure.
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Affiliation(s)
- Archisman Mahapatra
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Banaras Hindu University, Varanasi, India.
| | - Priya Gupta
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Banaras Hindu University, Varanasi, India.
| | - Anjali Suman
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Banaras Hindu University, Varanasi, India
| | - Shubhendu Shekhar Ray
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Banaras Hindu University, Varanasi, India
| | - Rahul Kumar Singh
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Banaras Hindu University, Varanasi, India.
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Rangasamy B, Ramesh M, Malafaia G, Maheswaran R. Hematological changes, redox imbalance, and changes in Na +/K +-ATPase activity caused by bisphenol-A and the integrated biomarker responses in Labeo rohita (Hamilton, 1822). Sci Total Environ 2023; 858:159844. [PMID: 36461564 DOI: 10.1016/j.scitotenv.2022.159844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 06/17/2023]
Abstract
Bisphenol-A (BPA) is a plasticizer commonly used in the plastics industry to manufacture plastic materials. It is abundant in aquatic ecosystems, resulting in increased contamination and lower concentrations that may represent a significant threat to the aquatic system. Hence in the present study, an Indian major carp, Labeo rohita, was exposed to two different BPA concentrations (1 and 10 μg/L) for 30 days. Compared to control, the chronic effects resulted in significant alterations in red blood cell (RBC) and white blood cells (WBC) count. The exposure to BPA caused significant changes in antioxidant activity in gill, liver, and kidney tissues (inferred by catalase, glutathione peroxidase, and glutathione S-transferase activity) in L. rohita. Regarding lipid peroxidation (LPO), we observed an increase in liver and kidney alteration, while LPO was noted in gill tissue compared to the control. Furthermore, increased Na+/K+-ATPase activity was observed in gills at the end of the 10th day and a gradual decrease at the end of the 30th day. These results indicated that exposure to BPA alters the RBC and WBC levels, antioxidant enzyme activity (gills, liver, and kidney), and Na+/K+-ATPase activity in the gill of L. rohita exposed to BPA (at 1 and 10 μg/L). Therefore, our findings will help us gain better insight into the toxicity of BPA in freshwater ichthyofauna.
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Affiliation(s)
- Basuvannan Rangasamy
- Entomology Laboratory, Department of Zoology, School of Life Sciences, Periyar University, Salem, Tamil Nadu 636 011, India
| | - Mathan Ramesh
- Unit of Toxicology, Department of Zoology, Bharathiar University, Coimbatore, Tamil Nadu 641046, India
| | - Guilherme Malafaia
- Laboratory of Toxicology Applied to the Environment, Goiano Federal Institute, Urutaí, GO, Brazil.
| | - Rajan Maheswaran
- Entomology Laboratory, Department of Zoology, School of Life Sciences, Periyar University, Salem, Tamil Nadu 636 011, India.
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Gupta P, Mahapatra A, Suman A, Singh RK. In silico and in vivo assessment of developmental toxicity, oxidative stress response & Na +/K +-ATPase activity in zebrafish embryos exposed to cypermethrin. Ecotoxicol Environ Saf 2023; 251:114547. [PMID: 36680990 DOI: 10.1016/j.ecoenv.2023.114547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 12/21/2022] [Accepted: 01/11/2023] [Indexed: 06/17/2023]
Abstract
Cypermethrin (CYP), a synthetic type II pyrethroid pesticide, is extensively used to control pests in industrial, domestic, and agricultural environments. However, its indiscriminate use leads to a potential threat to aquatic organisms. Although several reports focussed on developmental toxicity effects, a concise study combining cardiotoxicity along with Na+/K+-ATPase activity and molecular docking of developmental proteins with CYP was lacking. This present study was designed to address this gap to comprehend the impact of CYP exposure (0, 25, 100 and 200 µg/L) on embryonic zebrafish. As a result, CYP delayed the hatching rate, reduced heart rate, increased mortality rate and induced numerous morphological abnormalities. Subsequently, CYP induced oxidative stress in treated zebrafish embryos with the concomitant increase in antioxidant enzymes (SOD and CAT) and malondialdehyde production. In addition, an alteration in AChE, NO content and Na+/K+-ATPase activity was observed, suggesting a disruption in cardiac development and ion regulation. Furthermore, AO staining showed notable apoptotic cells which are supported by alteration in apoptosis-related gene expressions. Moreover, to explore the putative targets of CYP, computational docking with developmental proteins (WNT3A, WNT8A, GATA-4, Nkx 2-5 and ZHE1) showed strong interactions and binding. Taken together, our findings provide a better understanding of assessing the ecotoxicological risk information and the mode of action underlying the development of teleost fishes following CYP exposure. Meanwhile, the pioneering nature of this study is to emphasize the future use of Na+/K+-ATPase activity as a potential toxicity biomarker and in silico molecular docking studies to complement developmental toxicity findings.
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Affiliation(s)
- Priya Gupta
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Archisman Mahapatra
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Anjali Suman
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Rahul Kumar Singh
- Molecular Endocrinology and Toxicology Laboratory (METLab), Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
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Curcio V, Macirella R, Sesti S, Ahmed AIM, Talarico F, Tagarelli A, Mezzasalma M, Brunelli E. Morphological and Functional Alterations Induced by Two Ecologically Relevant Concentrations of Lead on Danio rerio Gills. Int J Mol Sci 2022; 23:9165. [PMID: 36012426 PMCID: PMC9409012 DOI: 10.3390/ijms23169165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/10/2022] [Accepted: 08/14/2022] [Indexed: 11/16/2022] Open
Abstract
Lead (Pb), due to its high toxicity and bioaccumulation tendency, is one of the top three pollutants of concern for both humans and wildlife and occupies second place in the Priority List of Hazardous Substances. In freshwater fish, Pb is mainly absorbed through the gills, where the greatest accumulation occurs. Despite the crucial role of gills in several physiological functions such as gas exchange, water balance, and osmoregulation, no studies evaluated the effects of environmentally relevant concentrations of Pb on this organ, and existing literature only refers to high levels of exposure. Herein we investigated for the first time the molecular and morphological effects induced by two low and environmentally relevant concentrations of Pb (2.5 and 5 μg/L) on the gills of Danio rerio, a model species with a high translational value for human toxicity. It was demonstrated that Pb administration at even low doses induces osmoregulatory dysfunctions by affecting Na+/K+-ATPase and AQP3 expression. It was also shown that Pb upregulates MTs as a protective response to prevent cell damage. Modulation of SOD confirms that the production of reactive oxygen species is an important toxicity mechanism of Pb. Histological and morphometric analysis revealed conspicuous pathological changes, both dose- and time-dependent.
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