Microplastics are now ubiquitous, with tiny fragments found in several major organs, including the placenta. Understanding the risks they pose to our health is critical.
Researchers are exploring the risks posed by these microplastics. Studies using mini-replicas of organs and mice have been conducted, yet human studies are sparse.
THE ITALIAN STUDY ON MICROPLASTICS
In March, a small study in Italy revealed microplastics in fatty deposits removed from patients undergoing artery-clearing surgeries. These findings were followed up nearly three years later.
The study focused on carotid endarterectomy, a procedure to reduce stroke risk by removing fatty plaques from arteries. Researchers, led by Raffaele Marfella from the University of Campania, examined the risk of stroke, heart attacks, and death in patients with microplastics in their plaques.
KEY FINDINGS OF THE STUDY
Over 34 months, 257 patients were monitored. Nearly 60% had polyethylene in their plaques, and 12% had polyvinyl chloride (PVC). Both plastics are common in everyday items like plastic bags and bottles.
Microplastics in the bloodstream raise concerns about heart health. Lab studies indicate microplastics can cause inflammation, oxidative stress, impair heart function, alter heart rates, and cause heart scarring.
OBSERVATIONAL DATA AND HEALTH RISKS
Observational studies suggest an increased risk of cardiovascular disease in those exposed to plastic-related pollution, including PVC. Patients with microplastics in their plaques were 4.5 times more likely to suffer strokes, non-fatal heart attacks, or die from any cause over 34 months.
Microplastics and smaller particles, nanoplastics, were measured using pyrolysis-gas chromatography-mass spectrometry. Their presence was confirmed through stable isotopes analysis, distinguishing between human tissue carbon and petrochemical plastic carbon.
VISUAL EVIDENCE OF MICROPLASTICS
Powerful microscopes revealed plastic fragments with jagged edges inside immune cells and fatty plaques. Higher levels of inflammatory markers were found in patients with microplastics.
LIMITATIONS OF THE STUDY
This observational study cannot conclusively prove microplastics cause heart effects. It did not account for other cardiovascular disease risk factors, such as smoking, inactivity, and air pollution.
Philip J. Landrigan of Boston College highlighted that finding microplastics in plaque tissue raises urgent questions about reducing exposure. Despite rising plastic production, cardiovascular disease rates have fallen in some regions, indicating more research is needed.
Microplastics pose a hidden threat to human health, infiltrating major organs and potentially contributing to severe cardiovascular issues. Understanding and mitigating this exposure is crucial for our well-being. Further research is essential to uncover the full impact of microplastics on human health and to develop strategies for reducing exposure. The findings from recent studies underscore the urgent need for action to address this emerging public health concern.