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| Main Authors: | , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Environmental toxicology and pharmacology
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/40816358/ |
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Table of Contents:
- Silent smoke, silent stress: Mussels as sentinels of cigarette pollution in coastal waters. Mendes, Guilherme Cunha, Marta Soares, Amadeu M V M Freitas, Rosa Animals Water Pollutants, Chemical Mytilus Nicotine Cotinine Gills Environmental Monitoring Biomarkers Digestive System Cigarette butts are a major source of marine litter, releasing contaminants such as nicotine and its metabolite cotinine into aquatic ecosystems. This study assessed sublethal biochemical responses of Mytilus galloprovincialis exposed for 28 days to environmentally relevant concentrations (0.5, 5.0, 10 μg/L) of both compounds. Biomarkers in gills and digestive gland tissues were analysed, covering energy metabolism, antioxidant and detoxification enzymes, cellular damage, and neurotoxicity. Gills exhibited stronger antioxidant responses, whereas digestive gland showed enhanced metabolic and detoxification activity. Nicotine induced more consistent antioxidant capacity than cotinine, potentially explaining higher lipid peroxidation in cotinine treatments. Principal coordinates analysis revealed distinct response patterns by contaminant type and dose. Findings support the role of mussels as bioindicators of tobacco-related pollution and underline the sublethal risks of cigarette-derived contaminants to coastal ecosystems. Further research should address long-term ecological effects to guide mitigation strategies for this pervasive pollutant.