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Circulating Microplastics in Acute Ischemic Stroke: Feasibility, Variability, and Exploratory Comparisons with Healthy Individuals
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Scientists found tiny plastic particles (microplastics) in the blood of almost everyone tested, and stroke patients showed higher levels than healthy people in one comparison — though the difference wasn't clear-cut when comparing groups tested the same way. This is an early, small study, so it doesn't prove microplastics cause strokes, but it does show blood testing for plastics is possible and worth studying further to understand if these particles affect heart and brain health.
BACKGROUND: Microplastics (MPs) have been detected in human tissues and implicated in vascular injury in preclinical models, but evidence on circulating MPs in humans is scarce. Surgical and autopsy samples have provided most data to date but are unsuitable for large-scale biomonitoring to clarify potential cardiovascular relevance. METHODS: We conducted a prospective pilot study applying a contamination-controlled, plastic-free protocol to quantify MPs in whole blood. Thirty-five participants were enrolled: 20 with ischemic stroke and 15 healthy controls. Samples were analyzed by micro-Fourier transform infrared spectroscopy to determine particle counts, polymer types, and size distributions. To contextualize findings, we performed an exploratory pooled comparison with a reference of healthy individuals derived from two published datasets using weighted combination of reported means and standard deviations. RESULTS: Overall, MPs were detected in 94% of participants (median 11.0 MPs/mL; IQR 4-22; mean ± SD, 12.6 ± 9.7; range 0-35). Within this pilot cohort, median MP counts were numerically higher in stroke (13.5 MPs/mL [IQR 6-23]) than in healthy controls (7.0 MPs/mL [IQR 2-18]), but group differences were not statistically significant in direct, within-study comparisons (p = 0.21, Mann-Whitney U). In an exploratory analysis, stroke patients exhibited significantly higher mean MP concentrations than a pooled healthy reference derived from external datasets (13.95 ± 8.73 vs 5.11 ± 7.31 MPs/mL; Welch's t = 3.69, p = 0.0016). Polyethylene, polypropylene, and polyethylene terephthalate were the most abundant polymers, and smaller particles (20-100 µm) predominated. MP burden showed no consistent association with age, sex, or vascular risk factors. CONCLUSIONS: This proof-of-concept study demonstrates the feasibility of blood-based MP quantification under clinical conditions and provides a preliminary, hypothesis-generating observation that circulating MP levels may be elevated in acute ischemic stroke. Because the apparent difference relied on an exploratory pooled comparison across heterogeneous datasets, confirmation in larger, harmonized studies is essential before any inference about disease-specific elevation or clinical relevance is justified.
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Circulating Microplastics in Peripheral Blood and the Tobacco-AMI-MPs Axis: A Pilot Screening in Patients with Myocardial Infarction and Healthy Controls
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Scientists found tiny plastic particles (microplastics) in the blood of both heart attack patients and healthy people, using a new testing method—though this small pilot study wasn't large enough to prove a clear link between microplastics and heart attacks. Interestingly, smokers had different types of plastic in their blood than non-smokers, matching materials found in cigarette packaging and filters, suggesting smoking may be a direct source of plastic exposure. This early-stage research shows the testing method works well and paves the way for larger studies to better understand how plastic pollution in our bodies might affect heart health.
Nanoplastics and Microplastics and Their Link to Increasing Stroke Risk
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Tiny plastic particles from everyday items like packaging and synthetic fabrics may be getting into our bodies and could be linked to a higher risk of stroke. This research looks at how these microscopic plastic bits might affect our blood vessels and brain health, adding to growing concerns about plastic pollution's impact on our bodies. While more research is needed to fully understand this connection, it's a good reminder to think about reducing plastic exposure where possible, like using less plastic packaging and filtering drinking water.
[Microplastics and thrombo-inflammation in acute ischemic stroke : adding fuel to the fire].
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Tiny plastic particles from everyday sources—food, water, air—are showing up in human blood vessels, brain tissue, and even blood clots, and this review of existing research suggests they may worsen strokes by fueling inflammation and abnormal clotting in the body. While more research is needed to confirm exactly how much these plastics contribute to stroke risk, scientists say this is a serious enough concern that we need better ways to detect and reduce our exposure to microplastics now.
Circulating Microplastics in Routine Peripheral Blood: Bedside-Accessible Raman Screening in Myocardial Infarction and Controls
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Researchers tested regular blood draws (not from heart procedures) from 8 healthy people and 6 heart attack patients, using a detailed particle-by-particle technique. Plastic particles turned up in 4 of 6 heart attack patients and 2 of 8 healthy controls, but the study was too small to show a clear link.
Abstract Number: Esoc2026a54 Circulating Microplastics in Acute Ischemic Stroke: Feasibility, Variability, and Exploratory Comparisons with Healthy Individuals
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Researchers quantified microplastics in blood from 20 acute ischemic stroke patients and 15 healthy controls using contamination-controlled micro-FTIR analysis, finding numerically higher median MP counts in stroke patients and, in an exploratory pooled comparison with external healthy-reference datasets, a statistically significant elevation — though authors caution this remains hypothesis-generating pending larger harmonized studies.
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