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Microplastics and nanoplastics in matched human blood, bone, and intervertebral discs: Accumulation patterns and risks
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Scientists found tiny plastic particles (microplastics and nanoplastics) in the blood, bone, and spinal discs of 21 patients undergoing back surgery—and the discs, which have poor blood flow and repair themselves slowly, tended to accumulate the most plastic. While the chemical risks appear low for now, the buildup of these particles in slow-healing tissue raises concerns that plastics could physically contribute to tissue damage or degeneration over time, something worth watching as plastic pollution continues to rise.
The presence of microplastics (MPs) and nanoplastics (NPs) in the human has raised health concerns, yet their tissue-specific accumulation in avascular environments remains unclear. Laser micro-Raman spectroscopy and pyrolysis-gas chromatography/mass spectrometry were employed to quantify MNPs from 21 donors undergoing spinal fusion. MPs showed a tissue-specific abundance gradient, with number concentrations of 6.74 ± 4.40 n/mL in blood, 13.26 ± 5.49 n/g in bone, and 13.55 ± 4.48 n/g in intervertebral disc, and mean particle sizes of 64.50 μm, 57.10 μm, and 77.60 μm, respectively; particles smaller than 100 μm accounted for 90.0%, 92.5%, and 62.5%, respectively. NPs (0.16–20.28 μg/g) were ubiquitously detected, with polyvinyl chloride and polyamide 66, accounting for 78.2% of the total mass, indicating distinct tissue-selective enrichment. A regulated accumulation pattern showed a dominant “disc-enriched” profile in nearly half the individuals. Fiber morphology, white color, larger size, and PET/PE polymers were identified as key drivers of tissue-selective retention. Although calculated chemical risks remain within safety limits, the substantial NPs sequestration in the avascular disc suggests an overlooked mechanism of long-term physical burden and potential tissue degradation. This study provides novel insights into the individualized MNPs accumulation and highlight the need to re-evaluate the health implications of plastic pollution in slow-metabolizing tissues.
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The Human Intervertebral Disc as a Long-Term Repository for Micro/Nanoplastics: Tissue-Specific Accumulation and Risk Estimation
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Researchers quantified microplastic and nanoplastic accumulation in blood, bone, and intervertebral disc tissue from 21 surgical patients, finding a distinct disc-enriched accumulation profile in nearly half of individuals, with nanoplastics dominated by polyvinyl chloride and polyamide 66, suggesting the avascular disc may serve as a long-term plastic reservoir.
From accumulation to degeneration: Microplastics as emerging risk factors for intervertebral disc health
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Researchers reviewed evidence that microplastics accumulate in human intervertebral disc tissue at significantly higher concentrations (61 ± 44 particles/g) than in bone or cartilage, and discussed mechanisms by which this accumulation may contribute to disc degeneration.
Microplastics in nucleus pulposus tissue of humans revealed by Raman mosaic imaging screening
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Scientists looked at the soft, gel-like tissue inside spinal discs from 51 patients who had back surgery, and found tiny plastic particles in 5 of them—including bits of polyurethane foam and other polymers, some smaller than the width of a human hair. This is one of the first times plastics have been found in this particular part of the spine, and while it doesn't yet tell us whether these particles cause harm, it adds to growing evidence that microplastics can turn up in surprising places throughout the body. More research is needed to understand how they get there and whether they affect spinal health.
Microplastics in human skeletal tissues: Presence, distribution and health implications
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This study is the first to find microplastics in human bones, cartilage, and spinal discs, with the highest concentrations found in spinal discs. The most common plastics detected were polypropylene and polystyrene, and animal experiments confirmed that microplastics can reach skeletal tissues through the bloodstream. Exposure triggered inflammatory markers in the blood, suggesting microplastics in bones could contribute to skeletal health problems.
Environmental Micro-Nanoplastics and Musculoskeletal Disorders: Current Research and Insights
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Tiny plastic particles from everyday sources like packaging, water, and airborne dust can build up in our bones, joints, and spinal discs — and this review pulls together existing research showing how they may damage these tissues through inflammation, cell stress, and other harmful processes. This matters because it suggests microplastics could contribute to conditions like osteoporosis, arthritis, and disc degeneration, though scientists still need more research to fully understand the risks and figure out how to protect people.
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