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Polyethylene terephthalate microplastics induce immune evasion and malignant remodeling in breast cancer through multi-omics-identified immune checkpoints
Summary
Researchers used computational and laboratory methods to investigate how polyethylene terephthalate microplastics may promote immune evasion in breast cancer cells. They identified four immune-related genes that appear to be affected by microplastic exposure, potentially allowing cancer cells to avoid immune detection. The study suggests that microplastic contamination could influence cancer progression through immune system disruption, though further research is needed.
Polyethylene terephthalate (PET) microplastics (MPs) have emerged as a significant environmental contaminant with potential adverse effects on human health, particularly in cancer biology. This study investigates the molecular and immunological mechanisms underlying the influence of PET-MPs on breast cancer (BC) progression. Employing an integrative approach that combines bioinformatics analysis of public cancer databases (TCGA), molecular docking simulations, and in vitro experiments, we identified four immune-related genes-CCL19, KLRB1, CD40LG, and IGLL5-that are potentially modulated by PET-MPs. Molecular docking indicated that bis(2-hydroxyethyl) terephthalate (BHET), a key PET oligomer, binds with high affinity to these proteins, suggesting that PET-MPs may alter immune homeostasis within the tumor microenvironment (TME). Additionally, PET-MPs induced a pro-inflammatory cytokine response, including elevated IL-6 and TNF-α secretion, which could promote tumor progression. Our findings further suggest that PET-MPs may enhance BC cell proliferation and survival through immune modulation. However, limitations include the lack of immune cell co-culture models and in vivo validation. This study provides essential insights into the immunotoxicity of PET-MPs and highlights the need for further research to explore their direct and indirect effects on cancer development.
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