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Updated: Dec 21, 2025

Accumulation and Distribution of Fluorescent Microplastics in the Early Life Stages of Zebrafish

Accumulation and Distribution of Fluorescent Microplastics in the Early Life Stages of Zebrafish

Published on: July 4, 2021

Polystyrene microplastics decrease F-53B bioaccumulation but induce inflammatory stress in larval zebrafish.

Huilin Yang¹, Hong Lai², Jing Huang³

¹College of Life Science, Jiangxi Normal University, Nanchang, 330022, China.

|May 17, 2020

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This summary is machine-generated.

Microplastics (MPs) reduced the accumulation of a chemical contaminant (F-53B) in zebrafish larvae. However, combined exposure to MPs and F-53B induced significant inflammatory stress and oxidative damage in the aquatic organisms.

Area of Science:

Environmental Toxicology
Aquatic Ecotoxicology
Chemical Contamination

Background:

Microplastics (MPs) are emerging environmental contaminants of concern.
MPs can act as carriers for other organic pollutants, potentially altering their environmental fate and biological effects.
Understanding the combined effects of MPs and co-contaminants on aquatic organisms is crucial for risk assessment.

Purpose of the Study:

To investigate the impact of polystyrene microplastics (PS-MPs) on the bioaccumulation and immunomodulation of 6:2 chlorinated polyfluorinated ether sulfonate (F-53B) in zebrafish larvae.
To evaluate the effects of co-exposure to F-53B and PS-MPs on oxidative stress, immune response, and inflammatory pathways in zebrafish.

Main Methods:

Zebrafish larvae were exposed to F-53B, PS-MPs, or a combination for 7 days.

Keywords:

F-53B Immune system Oxidative stress PS-MPs Zebrafish

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Assessed body weight, bioaccumulation of F-53B, and levels of oxidative stress biomarkers (SOD, MDA).

Evaluated immune responses including lysozyme activity, IgM content, pro-inflammatory gene expression (cxcl-clc, il-1β), iNOS protein levels, and NF-κB activation.

Main Results:

PS-MPs promoted F-53B sorption, reducing its bioavailability and bioaccumulation in zebrafish larvae.
Combined exposure significantly reduced body weight, superoxide dismutase (SOD) activity, and lysozyme activity, indicating oxidative stress and inflammation.
Co-exposure increased malondialdehyde (MDA) and immunoglobulin M (IgM) levels, upregulated pro-inflammatory genes (cxcl-clc, il-1β), increased iNOS protein, and activated the NF-κB pathway.

Conclusions:

While MPs reduced F-53B bioaccumulation, their co-exposure with F-53B induced significant inflammatory stress and oxidative damage in larval zebrafish.
The NF-κB pathway is implicated in mediating the inflammatory responses observed during co-exposure.
These findings highlight the complex health risks associated with the co-contamination of aquatic environments by MPs and chemical pollutants like F-53B.