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Nanoelectrochemistry monitoring of intracellular reactive oxygen and nitrogen species induced by nanoplastic exposure
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Researchers used tiny nanoelectrodes to measure reactive oxygen and nitrogen species inside lung cells exposed to nanoplastics. They found that nanoplastic exposure significantly increased nitrogen-based reactive species while oxygen-based species remained relatively stable. The study provides new evidence about the specific types of oxidative stress that airborne nanoplastics can trigger inside human cells.
Airborne nanoplastics can enter alveolar cells and trigger intracellular oxidative stress primarily. Herein, taking advantage of the high electrochemical resolution of SiC@Pt nanoelectrodes, we achieved the quantitative discrimination of the major ROS/RNS within A549 cells, disclosed the sources of their precursors, and observed that the NO (RNS precursor) level significantly increased, whereas O2˙- (ROS precursor) remained relatively stable during the nanoplastics exposure. This establishes that iNOS or mitochondrion-targeted treatment may be a preventive or therapeutic strategy for nanoplastic-induced lung injury.
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Scientists built a tiny, ultra-sensitive sensor that can detect the harmful chemical byproducts (a type of "oxidative stress") produced inside individual human cells when they're exposed to nanoplastics, tiny plastic particles from environmental pollution. Using this tool, they found that different types of human cells react differently to nanoplastic exposure, suggesting some tissues may be more vulnerable to plastic-related damage than others. This kind of precise, cell-by-cell measurement could help researchers better understand exactly how nanoplastics harm our bodies, an important step as concerns grow about plastic contam
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