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2017 ; 7
(ä): 46687
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Tissue accumulation of microplastics in mice and biomarker responses suggest
widespread health risks of exposure
#MMPMID28436478
Deng Y
; Zhang Y
; Lemos B
; Ren H
Sci Rep
2017[Apr]; 7
(ä): 46687
PMID28436478
show ga
Microplastics (MPs) are a significant environmental health issue and increasingly
greater source of concern. MPs have been detected in oceans, rivers, sediments,
sewages, soil and even table salts. MPs exposure on marine organisms and humans
has been documented, but information about the toxicity of MPs in mammal is
limited. Here we used fluorescent and pristine polystyrene microplastics (PS-MPs)
particles with two diameters (5??m and 20??m) to investigate the tissue
distribution, accumulation, and tissue-specific health risk of MPs in mice.
Results indicated that MPs accumulated in liver, kidney and gut, with a
tissue-accumulation kinetics and distribution pattern that was strongly depended
on the MPs particle size. In addition, analyses of multiple biochemical
biomarkers and metabolomic profiles suggested that MPs exposure induced
disturbance of energy and lipid metabolism as well as oxidative stress.
Interestingly, blood biomarkers of neurotoxicity were also altered. Our results
uncovered the distribution and accumulation of MPs across mice tissues and
revealed significant alteration in several biomarkers that indicate potential
toxicity from MPs exposure. Collectively, our data provided new evidence for the
adverse consequences of MPs.