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Differential distribution of microplastics in breast cancer and peritumoral tissues and relationship with clinical characteristics
Summary
Scientists studying breast cancer tissue found tiny plastic particles—from things like packaging and rubber—in every single tumor sample they examined, and some types of these plastics showed up in higher amounts in the cancerous tissue compared to the healthy tissue right next to it. This is a small early study (only 8 patients), so it can't prove plastics cause cancer, but it raises important questions about whether the microplastics we're constantly exposed to in daily life might be settling in our bodies in ways that matter for our health.
The distribution characteristics of microplastics (MPs) in paired breast cancer tumor and para-tumor tissues, and their potential associations with clinical characteristics, remain insufficiently understood. This study included eight breast cancer patients with surgical resection whose paired tumor and para-tumor tissues were collected. The morphologies, particle sizes, and types of microplastics within the tissues were identified and characterized using Laser Direct Infrared (LDIR) spectroscopy and Scanning Electron Microscopy (SEM). Moreover, correlations between microplastic abundance and patients' demographic and clinical characteristics were analyzed. SEM imaging revealed diverse morphologies-granular, fibrous, and irregular-often exhibiting folds and fractures. The majority of microplastic particles were within the 20-100 μm size range. Multiple types of polymeric microplastics-including Fluororubber (Flu), polyethylene (PE), polyethylene terephthalate, polypropylene, and polyvinyl chloride (PVC)-were detected in all paired samples. Notably, the abundance of Flu, PE, and PVC was significantly higher in tumor tissues compared to para-tumor tissues. Correlation analyses identified exploratory associations between selected microplastic types, body mass index, and certain tumor biomarkers. These findings provide preliminary evidence of tissue-specific MP distribution in breast cancer and support further investigation into the potential biological relevance of microplastics in breast cancer.