Toxic effects of nanoplastics on a model of dog aortic cells

Area of Science:

• Environmental Science
• Cell Biology
• Toxicology

Background:

• Nanoplastic fragments (NP) pose a growing environmental and health concern.
• Understanding the cellular effects of NP is crucial for risk assessment.

Purpose of the Study:

• To investigate the interaction of NP with dog aortic endothelial cells (CnAEOC).
• To assess the impact of NP on cell proliferation, metabolic activity, oxidative stress, autophagy, and gene expression.

Main Methods:

• Fluorescence microscopy to observe NP-cell interaction.
• Assays for cell proliferation, metabolic activity, reactive oxygen species (ROS) production, and enzymatic/non-enzymatic antioxidant defenses.
• Analysis of autophagy markers and gene expression profiling (RNA-seq, RT-PCR).

Main Results:

• NP localized within the cytoplasm of CnAEOC.
• Significant disruption of cell proliferation and metabolic activity observed.
• NP induced oxidative stress, evidenced by increased ROS production and inhibited enzymatic defenses, while non-enzymatic defenses remained unaffected.
• No induction of autophagy or differential gene expression was detected in NP-treated cells.

Conclusions:

• Nanoplastics induce cytotoxicity and oxidative stress in aortic endothelial cells.
• Cellular defense mechanisms like enzymatic antioxidants are compromised by NP exposure.
• NP do not appear to trigger autophagy or alter gene expression in this cellular model.