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The invisible Threat: Assessing the reproductive and transgenerational impacts of micro- and nanoplastics on fish
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This review examines how micro- and nanoplastics can cross biological barriers in fish, accumulate in reproductive organs, and cause damage that passes down to offspring who were never directly exposed. The findings raise concerns about the long-term effects of plastic pollution on aquatic food chains, since fish that humans consume may have accumulated microplastics that affected their development and reproductive health.
Micro- and nanoplastics (MNPs), emerging as pervasive environmental pollutants, present multifaceted threats to diverse ecosystems. This review critically examines the ability of MNPs to traverse biological barriers in fish, leading to their accumulation in gonadal tissues and subsequent reproductive toxicity. A focal concern is the potential transgenerational harm, where offspring not directly exposed to MNPs exhibit toxic effects. Characterized by extensive specific surface areas and marked surface hydrophobicity, MNPs readily adsorb and concentrate other environmental contaminants, potentially intensifying reproductive and transgenerational toxicity. This comprehensive analysis aims to provide profound insights into the repercussions of MNPs on fish reproductive health and progeny, highlighting the intricate interplay between MNPs and other pollutants. We delve into the mechanisms of MNPs-induced reproductive toxicity, including gonadal histopathologic alterations, oxidative stress, and disruptions in the hypothalamic-pituitary-gonadal axis. The review also underscores the urgency for future research to explore the size-specific toxic dynamics of MNPs and the long-term implications of chronic exposure. Understanding these aspects is crucial for assessing the ecological risks posed by MNPs and formulating strategies to safeguard aquatic life.
More Papers Like This
The Effects of Micro & Nano Pollution on Fish Reproduction
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This review summarizes how micro- and nano-sized pollutants — including microplastics — enter fish through food, respiration, and direct contact, disrupting reproductive success and causing developmental abnormalities in offspring. The cumulative harm to fish reproduction poses a long-term threat to aquatic population viability, with potential cascading effects up the food chain to humans.
Toxic effects of microplastic and nanoplastic on the reproduction of teleost fish in aquatic environments
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This review summarizes research on how microplastics and nanoplastics harm the reproductive systems of fish, covering effects on fertility, sperm quality, egg development, and offspring abnormalities. The tiny plastic particles enter fish through their digestive tract, gills, and skin, causing oxidative damage that disrupts reproduction at the molecular and cellular level. Since fish are a major protein source for humans, reproductive damage to fish populations could affect both food security and the transfer of microplastics through the food chain.
A systematic review of the effects of nanoplastics on fish
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This systematic review examines how nanoplastics (extremely small plastic particles) affect fish, including their ability to cross biological barriers and accumulate in tissues. The findings are relevant to human health because fish are a major dietary protein source, and understanding how plastics move through aquatic food chains helps us assess our own exposure risks.
Biotransport and toxic effects of micro- and nanoplastics in fish model and their potential risk to humans: A review
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This review examines how micro- and nanoplastics enter fish through ingestion, inhalation, and skin contact, causing damage to multiple organ systems including the brain, heart, and reproductive organs. The particles trigger harmful cellular responses such as oxidative stress, DNA damage, and mitochondrial dysfunction. The study emphasizes that these pollutants can also reach humans through the food chain, highlighting the need for strategies to reduce plastic contamination in aquatic environments.
Unraveling the threat: Microplastics and nano-plastics' impact on reproductive viability across ecosystems
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This review summarizes research on how microplastics and nanoplastics affect reproduction across many species, from aquatic invertebrates to mammals including humans. In males, exposure leads to testicular damage, lower sperm quality, and hormone disruption; in females, it causes ovarian and uterine problems, inflammation, and reduced fertility. The evidence also shows these reproductive harms can be passed to offspring, raising serious concerns about long-term effects on human fertility.
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