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Airborne pollution poses a significant risk to respiratory health, particularly in densely populated urban environments. Recent research shows that a nanoplastic corona lung cancer interaction significantly accelerates tumor growth. When individuals inhale polyethylene terephthalate (PET) nanoplastics, these particles acquire a protein coating in the lungs. This coating, known as a protein corona, determines the particle's biological activity and impact on tumor-bearing tissues.
A study published in ACS Nano investigated how these nanoplastics behave in cancer-susceptible lungs. Researchers found that PET nanoplastics incubated with fluid from lung adenocarcinoma patients selectively enriched lysozyme (LYZ). This specific protein corona changes the particle's biological identity. Consequently, the modified particles activate the PGRN-LXRα signaling axis. This pathway increases lysosomal acidification-dependent efferocytosis, which is the process of clearing dead cells. While this sounds beneficial, in a tumor environment, it leads to M2 macrophage polarization. These "pro-tumor" macrophages suppress the immune response and reduce the infiltration of protective CD8 T-cells.
The study demonstrated that inhaled PET nanoplastics accelerated tumor growth in mice compared to controls. However, there is a potential for therapeutic intervention. By using AAV9-mediated knockdown of specific signaling components, the researchers reversed the immunosuppressive environment. This intervention restored CD8 T-cell levels and suppressed tumor growth. Therefore, targeting the corona-mediated signaling pathway could offer a new strategy for managing lung cancer in patients exposed to high levels of environmental pollution.
A nanoplastic corona is a layer of proteins and biomolecules that spontaneously coat nanoplastics when they enter biological fluids, such as those found in the lungs.
The corona activates specific signaling pathways that reprogram immune cells into a pro-tumor state. This process helps the cancer evade the immune system and grow more rapidly.
Experimental models suggest that knocking down the specific signaling proteins (like PGRN or LXRα) can reverse the immune evasion and slow down tumor progression.
Disclaimer: This content is for informational and educational purposes only. It does not constitute medical advice or establish a doctor-patient relationship. Refer to the latest local and national guidelines for clinical practice.
References
Ji Y et al. Personalized Pathogenic Nanoplastic Coronas Orchestrate Efferocytosis-Driven Immune Evasion in Lung Adenocarcinoma. ACS Nano. 2026 Jun 17. doi: 10.1021/acsnano.6c02211. PMID: 42307976.
Wu J et al. Chronic Exposure to Polystyrene Nanoplastics Promotes Lung Cancer Progression via Activating Gluconeogenesis and Inhibiting Glycolysis. Environment & Health. 2026. doi: 10.1021/envhealth.3c00215.
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