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Accumulation and Distribution of Fluorescent Microplastics in the Early Life Stages of Zebrafish
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Researchers developed a method using fluorescent microplastics to visually track the accumulation and distribution of plastic particles in zebrafish embryos and larvae. The technique revealed that microplastics accumulate in specific tissues during early development, with potential implications for aquatic organisms exposed in polluted waters.
As a new type of environmental pollutant, microplastic has been widely found in the aquatic environment and poses a high threat to aquatic organisms. The bioaccumulation of microplastics plays a key role in their toxic effects; however, as a particulate, their bioaccumulations are different from many other pollutants. Described here is a feasible method to visually determine the accumulation and distribution of microplastics in zebrafish embryos or larvae using fluorescent microplastics. Embryos are exposed to different concentrations (0.1, 1, and 10 mg/L) of fluorescent microplastics with a diameter of 500 nm for 120 h. It is shown in the results that microplastics can bioaccumulate in zebrafish embryos/larvae in a concentration-dependent manner. Before hatching, strong fluorescence is found around the embryonic chorion; while in zebrafish larvae, the yolk sac, pericardium, and gastrointestinal tract are the main accumulated sites of microplastics. The results demonstrate the uptake and internalization of microplastics in zebrafish at early life stages, which will provide basis for better understanding the impact of microplastics on aquatic animals.
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Accumulation and Distribution of Fluorescent Microplastics in the Early Life Stages of Zebrafish
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Researchers tracked the accumulation and distribution of fluorescent microplastics in early life stages of a freshwater organism, finding that microplastics were taken up and distributed across body tissues. The results help explain how microplastics accumulate in young aquatic organisms and potentially affect their development.
Fluorescent Polypropylene Nanoplastics for Studying Uptake, Biodistribution, and Excretion in Zebrafish Embryos
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Researchers developed a method to produce fluorescent polypropylene nanoplastics and tracked their movement in zebrafish embryos. The study found that the nanoplastics were ingested, distributed in the intestine, and eventually excreted, providing a new tool for assessing the biological risks of environmentally relevant plastic particles at the nanoscale.
Special Distribution of Nanoplastics in the Central Nervous System of Zebrafish during Early Development
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Researchers injected fluorescent nanoplastics into zebrafish embryos and found the particles became trapped in the brain, eyes, and spinal cord during early development and stayed there rather than moving to other organs. Although the nanoplastics did not embed directly in nerve cells, they still disrupted brain signaling and reduced larval movement, suggesting early-life nanoplastic exposure could interfere with nervous system development.
Migration of MPs across biological barriers in zebrafish
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The PlastSensing project developed new methods for detecting the migration of environmentally relevant microplastics across biological barriers in zebrafish tissue, using non-invasive visualization approaches that do not require tissue processing. The methods revealed plastic particle translocation pathways through zebrafish tissues at exposures relevant to real-world contamination levels.
Application of internal persistent fluorescent fibers in tracking microplastics in vivo processes in aquatic organisms
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A new method for producing fluorescent microfibers of controlled length was developed using a fiber slicer, and these fibers were successfully tracked inside aquatic organisms including water fleas, shrimp, and zebrafish using ultraviolet imaging. The technique provides a practical tool for studying how microfibers move through and accumulate within living organisms.
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