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  11. In-house Fabrication Of Nanoplastics Of Tunable Composition And Application: Assessment Of Bioelectric Changes In Primary Rat Lung Alveolar Epithelial Cell Monolayers Exposed To Nanoplastics

In-house Fabrication of Nanoplastics of Tunable Composition and Application: Assessment of Bioelectric Changes in Primary Rat Lung Alveolar Epithelial Cell Monolayers Exposed to Nanoplastics

Ricki Chairil1, Juan R Alvarez2,3, Arnold Sipos2,3

  • 1Mork Family Department of Chemical Engineering and Materials Science, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USA.

Bio-Protocol
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

This study introduces methods to create and test weathered nanoplastics (NPs) that mimic environmental pollution. Researchers can now better assess the biological impacts of these "real-world" NPs on lung cells.

Area of Science:

  • Environmental Science
  • Toxicology
  • Materials Science

Background:

  • Plastic pollution, particularly nanoplastics (NPs ≤1 μm), poses significant environmental and health risks.
  • Conventional detection methods fail for NPs, which can carry toxins or be inherently toxic.
  • Existing research often uses uniform, manufactured NPs, not reflecting real-world weathered NP pollution.

Purpose of the Study:

  • To develop a comprehensive protocol for studying the effects of environmentally relevant nanoplastics on biological systems.
  • To create methods for fabricating weathered NPs that mimic those found in the environment.
  • To establish a bioelectrical assay for assessing NP impacts on lung epithelial cells.

Main Methods:

  • Fabrication of various nanoplastics (NPs) weathered via UV light and O3 gas exposure.
Keywords:
Alveolar epithelial cell monolayer modelBioelectrical assay of active and passive ion transport propertiesIn-house fabrication of weathered nanoplastics

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  • Utilizing a bioelectrical method to assess ion transport in rat lung alveolar epithelial cell monolayers exposed to NPs.
  • Generating weathered NPs at high concentrations (up to 120 mg/mL) and yields (up to 12 mg/g bulk plastic).

    • Main Results:

    • Successful generation of simulated weathered environmental NPs with high yield and concentration.
    • Demonstration of a straightforward bioelectrical method to assess NP effects on cell monolayer ion transport.
    • Validation of the protocol's relevance for studying diverse, real-world NP shapes, sizes, and compositions.

    Conclusions:

    • The developed methods allow for the creation and study of "real-world" nanoplastics, moving beyond uniform, manufactured particles.
    • This protocol provides a rapid and accurate way to assess the biological impact of environmental NPs on vulnerable tissues like the lung air-blood barrier.
    • The approach is versatile, applicable to various plastic wastes and relevant for understanding environmental pollution effects without specialized equipment.
    Nanoplastic toxicity