We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Effects of micro/nanoplastics combined with three anthropogenic chemicals on larval zebrafish (Danio rerio): study of toxicity, behaviour and assessment of uptake
AI summary Read the abstract
Scientists found that tiny plastic particles alone didn't harm baby zebrafish, but when combined with common chemicals found in flame retardants and antidepressants, the plastics made those chemicals more toxic. This suggests that in the real world, where we're exposed to plastic particles and chemicals together, the combination could be more harmful than either one alone—even though this study was in fish, it raises questions about how plastic pollution might amplify chemical risks for humans too.
Micro and nanoplastics are ubiquitous and can lead to adverse biological effects in exposed organisms. Organisms can also be co-exposed to plastics along with synthetic chemicals. In this work, using the NRC Zebrafish Embryo Toxicity test, we evaluated the potential toxicity of different sized plastic particles, along with the effects of combining them with the known toxicants, triphenyl phosphate, tetrabromobisphenol A and fluoxetine. Following chemical/plastic exposure, morphological abnormalities and behaviour were recorded, along with the chemical uptake of the toxicants by the larvae. The PS sphere particles used (0.42, 2.25 and 8.87 µm) exhibited no significant effects on larvae at the environmental concentrations tested (0.05 – 50 µg/mL) including no changes in larval behavioural activities. However, the presence of the micro/nanoplastic particles did increase the overt toxicity of the chemicals by changing their EC50. Additionally, for all three chemicals, some plastic sizes decreased larval behaviour during the baseline or first light-dark period. Plastic particles did not modify the chemical uptake by the larvae. This suggests that enhanced toxicity caused by the plastics is not linked to changes in chemical uptake, metabolism, or excretion as hypothesized. Additional studies are necessary to better understand the role of plastic particles in a multiple stressor environment.
More Papers Like This
Single and mixtures toxicity of emerging (polystyrene nanoplastic) and persistent (PAHs and PCBs) pollutants and their sub-lethal adverse effects on larval stage zebrafish (Danio rerio)
AI summary Read the abstract
Scientists exposed baby zebrafish to common pollutants—like those from car exhaust and old industrial chemicals—both alone and combined with tiny plastic particles (nanoplastics) to see how they affect developing bodies. While nanoplastics alone caused no harm, combining them with these pollutants made things worse: fish had to work harder to process toxins and showed reduced blood flow to the heart. This suggests that in the real world, where we're exposed to plastic pollution alongside other chemicals at the same time, the combined effects on health could be more serious than looking at any single pollutant alone.
Combined Effects of Microplastics and Heavy Metals, Pesticides, and Antibiotics in Zebrafish ( Danio rerio ): A Critical Review
AI summary Read the abstract
This review of 86 zebrafish studies found that most research on microplastics mixed with metals, pesticides, or antibiotics lacks strong evidence to prove whether these combos make toxic effects worse or better. Microplastics can carry chemicals into the body or release them, but scientists still can't reliably predict which effect wins, meaning real-world health risks from combined exposures remain uncertain.
Combined neurotoxicity of aged microplastics and thiamethoxam in the early developmental stages of zebrafish (Danio rerio)
AI summary Read the abstract
This study found that aged (weathered) microplastics combined with the insecticide thiamethoxam caused worse neurological damage to zebrafish larvae than either pollutant alone. The combined exposure reduced heart rate and movement, disrupted antioxidant defenses, and altered neurotransmitter levels in ways that were synergistic rather than simply additive. This is relevant to human health because both microplastics and pesticides are common in the environment, and their combined effects may pose greater risks than either one individually.
The modulatory effects of polystyrene microplastics on BPA-induced DNA damage and neurotoxicity during early stages development in zebrafish
AI summary Read the abstract
Scientists exposed baby zebrafish to microplastics, the chemical BPA (found in some plastics), and both together to see how they affect brain development and DNA damage. Surprisingly, when the two pollutants were combined, the harmful effects were somewhat less severe than when BPA acted alone, suggesting these chemicals interact in complex, unpredictable ways rather than simply adding up. This matters because it shows we can't fully understand the health risks of plastic pollution by studying chemicals one at a time; real-world exposure to multiple pollutants together may behave differently than expected.
Effects of micro/nanoplastics combined with three anthropogenic chemicals on larval zebrafish (Danio rerio): study of toxicity, behaviour and assessment of uptake
AI summary Read the abstract
This review examined the biodegradation of petrochemical-derived plastics by microorganisms, synthesizing literature on bacterial and fungal strains capable of degrading polyethylene, polypropylene, polystyrene, and other common polymer types. The review evaluates degradation mechanisms, efficiency limitations, and the potential for scaling microbial plastic degradation.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.