Microplastics Found in Carotid Artery Plaque Signal Potential New Health Risk

Researchers have discovered elevated levels of micronanoplastics in artery-clogging plaque, potentially signaling a new environmental risk factor for cardiovascular disease. A small study presented at the American Heart Association's Vascular Discovery Scientific Sessions found that carotid artery plaque contained substantially more micronanoplastic particles compared to healthy arterial tissue.

The study examined 48 carotid artery samples from different adults, comparing micronanoplastic concentrations across three groups: individuals with healthy arteries, those with asymptomatic plaque, and patients who experienced stroke-related symptoms. Researchers found micronanoplastic levels were 16 times higher in asymptomatic plaque and 51 times higher in plaque from patients with neurological symptoms.

Lead researcher Ross Clark emphasized that micronanoplastics primarily enter human systems through food and water, not just plastic utensils or packaging. The particles, often invisible to the naked eye, can penetrate cells and tissues, potentially influencing biological processes in ways not yet fully understood.

While the study cannot definitively prove causation, it suggests a complex relationship between micronanoplastics and arterial health. Preliminary findings indicate potential differences in gene activity and immune cell responses related to plastic particle concentration, pointing to nuanced biological interactions beyond simple inflammatory responses.

Experts caution against drawing definitive conclusions, noting the research is preliminary and requires further investigation. The study represents an important first step in understanding how environmental microplastics might interact with human cardiovascular systems.