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Trojan horse in the intestine: A review on the biotoxicity of microplastics combined environmental contaminants
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This review examines how microplastics act as 'Trojan horses' by carrying other environmental contaminants such as heavy metals, persistent organic pollutants, and pathogens into the intestinal system. Researchers analyzed the mechanisms by which microplastics adsorb and release these co-contaminants and how the combinations affect the gut barrier. The study highlights that the interactive toxicity of microplastics with other pollutants may be more harmful than either pollutant alone, particularly to intestinal health.
With the reported ability of microplastics (MPs) to act as "Trojan horses" carrying other environmental contaminants, the focus of researches has shifted from their ubiquitous occurrence to interactive toxicity. In this review, we provided the latest knowledge on the processes and mechanisms of interaction between MPs and co-contaminants (heavy metals, persistent organic pollutants, pathogens, nanomaterials and other contaminants) and discussed the influencing factors (environmental conditions and characteristics of polymer and contaminants) that affect the adsorption/desorption process. In addition, the bio-toxicological outcomes of mixtures are elaborated based on the damaging effects on the intestinal barrier. Our review showed that the interaction processes and toxicological outcomes of mixture are complex and variable, and the intestinal barrier should receive more attention as the first line of defensing against MPs and environmental contaminants invasion. Moreover, we pointed out several knowledge gaps in this new research area and suggested directions for future studies in order to understand the multiple factors involved, such as epidemiological assessment, nanoplastics, mechanisms for toxic alteration and the fate of mixtures after desorption.
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Co-exposure with cadmium elevates the toxicity of microplastics: Trojan horse effect from the perspective of intestinal barrier
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When mice were exposed to both microplastics and the toxic metal cadmium together, the health damage to their intestines and liver was significantly worse than exposure to either pollutant alone. The microplastics acted like a "Trojan horse," carrying cadmium past the gut barrier and increasing its accumulation in the body, while also disrupting the gut microbiome.
Potential Health Risks of Micro-Nanoplastics and Persistent Organic Pollutants: A Review of Exposure Pathways and Toxic Effects
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This review examines how micro- and nanoplastics can enhance the bioavailability of persistent organic pollutants through a Trojan horse effect, leading to combined inflammatory, cellular, and metabolic toxic effects that threaten human health beyond what either contaminant causes alone.
Combined toxicity of micro/nanoplastics loaded with environmental pollutants to organisms and cells: Role, effects, and mechanism
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This review of 162 articles found that micro/nanoplastics act as vectors transporting heavy metals, persistent organic pollutants, drugs, bacteria, and viruses into organisms, with combined exposure often increasing toxicity beyond individual pollutant effects. Nanoplastics' 'Trojan horse' effect specifically increased the bioaccessibility of environmental pollutants, elevating carcinogenic risk to humans.
A review on the combined toxicological effects of microplastics and their attached pollutants
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Researchers reviewed how microplastics act as carriers for other environmental pollutants — including heavy metals and persistent organic chemicals — and how these combinations produce toxic effects in organisms that are more severe than either contaminant alone. The findings highlight a complex, layered toxicity problem that affects microbes, invertebrates, and vertebrates across marine and terrestrial environments.
Microplastics as vectors for environmental contaminants in the food chain: Assessing the combined toxicological effects and bioavailability
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This review examines how microplastics and nanoplastics act as carriers for environmental pollutants including heavy metals, organic chemicals, and microbial agents as they move through food chains. Researchers detail how polymer type, particle size, and environmental conditions influence the binding and release of these contaminants. The study highlights that the combined toxicity of microplastics together with the pollutants they carry may be greater than either would cause alone.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.