Plastics have significant global implications due to their environmental contamination from extensive use and improper disposal. Among plastic particles, nanoplastics (<1 μm) pose notable risks to organisms and ecosystems due to their high surface area, reactivity, and potential to carry environmental pollutants. This study explores the interaction between polystyrene nanoplastics (PSNPs) and clarithromycin (CLA), a broad-spectrum antibiotic, focusing on their combined impact on insulin (INS) and antibiotic-resistant (AMR) bacteria. PSNPs can adsorb CLA, leading to structural changes in insulin and affecting its physiological functions, potentially causing insulin resistance. Additionally, PSNPs reduce CLA's inhibitory effects on pathogenic bacteria, facilitating antibiotic resistance. Our research utilized UV-Vis Spectroscopy, FTIR, Fluorescence spectroscopy, and Circular dichroism (CD) spectroscopy to assess INS structural changes, alongside the Kirby-Bauer disk diffusion method for microbiological examination. The findings highlight the synergistic and antagonistic effects of PSNPs and CLA, underscoring the enhanced toxicity of CLA when adsorbed onto PSNPs and the complex interactions affecting both human health and bacterial resistance. Further studies are essential to fully understand these mechanisms and their broader implications.
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| http://dx.doi.org/10.1016/j.envpol.2024.125144 | DOI Listing |
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