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Related Experiment Video

Updated: Jul 27, 2026

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
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MRI-based microplastic tracking in vivo and targeted toxicity analysis.

Yuanyuan Hou1, Dujun Bian2, Yunmu Xiao1

  • 1National Engineering Laboratory of Applied Technology for Forestry & Ecology in South China, Laboratory of Urban Forest Ecology of Hunan Province, China; Department of Life and Environmental Science, Central South University of Forestry and Technology, Changsha 410004, Hunan, China.

The Science of the Total Environment
|October 8, 2024
PubMed
Summary

This study tracked microplastics (MPs) in vivo using MRI, finding the liver is the primary accumulation site. Positively charged MPs caused more severe liver toxicity and disrupted metabolic pathways.

Keywords:
BiotoxicologyLiver damageMRIMicroplasticsParticle tracking

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Area of Science:

  • Environmental Health
  • Toxicology
  • Biomedical Imaging

Background:

  • Microplastics (MPs) are emerging environmental pollutants with significant health concerns.
  • Detecting and tracking MPs in biological systems is challenging due to their small size and trace amounts.
  • Understanding MP biodistribution and toxicity is crucial for assessing environmental health risks.

Purpose of the Study:

  • To develop and apply a novel MRI-based method for tracking functionalized MPs in vivo.
  • To determine the primary accumulation site and biodistribution of polystyrene microplastics (PS-MPs).
  • To evaluate the toxicological effects of MPs on liver tissue and elucidate underlying biotoxicity mechanisms.

Main Methods:

  • Functionalized microplastics were developed for MRI tracking.
  • In vivo biodistribution was monitored continuously for 21 days using MRI.
  • Biochemical assays assessed liver tissue damage and enzyme alterations.
  • Metabolomics and proteomics analyses investigated molecular-level impacts.

Main Results:

  • The liver was identified as the primary accumulation site for PS-MPs.
  • MPs induced hepatocyte death, inflammation, and altered alkaline phosphatase levels.
  • Positively charged MPs demonstrated more pronounced toxicological effects.
  • PS-MPs disrupted hepatic metabolic pathways, including bile secretion and ABC transporters.

Conclusions:

  • MRI is an effective tool for in vivo MP tracking and biodistribution studies.
  • MPs pose toxicological risks to the liver, with charge influencing severity.
  • This study provides mechanistic insights into MP biotoxicity, informing environmental health assessments.