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Micro- and Nanoplastic Pollution and Renal Health: Human Evidence, Mechanisms, and Clinical Implications
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Tiny plastic particles have been found in human blood, urine, and even kidney tissue, and lab studies show they can stress kidney cells and potentially contribute to inflammation and scarring. This review pulls together what scientists currently know, but it's clear we still don't have solid proof that microplastics actually cause kidney disease in people, more research is needed, especially for those already dealing with kidney problems or dialysis, before we can say how worried to be.
Micro- and nanoplastics (MNPs) are reported in blood, urine, and tissues, including the kidney, raising concern that the urinary system may be both a target and a route of elimination. This narrative review integrates analytical, toxicokinetic, experimental, epidemiological, and dialysis-related evidence on MNPs and renal health. Human studies demonstrate renal access and urinary detection, but estimates are strongly method-dependent and do not yet define tissue dose, clearance, or a disease threshold. Cell, kidney-organoid, and animal studies consistently identify oxidative and mitochondrial stress, endoplasmic-reticulum dysfunction, inflammation, altered autophagy, regulated cell death, senescence, and fibrotic remodelling. Effects vary with polymer, size, shape, surface ageing, route, dose, and chemical co-exposures, and many experiments remain difficult to map to typical human exposure. Direct human outcome evidence is limited to cross-sectional or exploratory studies; plasticizer epidemiology is informative for chemical co-exposure but cannot establish particle-specific toxicity. Patients with chronic kidney disease may be more susceptible, while kidney dysfunction may also alter measured blood or urinary concentrations. Dialysis introduces an additional, incompletely quantified exposure system. MNP-related renal injury is biologically plausible, but causal contribution to human kidney disease and clinical actionability remain unproven. Standardized methods, paired-matrix kinetics, prospective cohorts, and complete dialysis mass-balance studies are priorities.
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Microplastics and the Kidney: A Narrative Review of Human Evidence, Molecular Mechanisms of Cell Injury, and Future Directions
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This review summarizes existing research on how tiny plastic particles might affect kidney health. It describes how plastics entering cells can trigger stress and damage in lab studies, and notes that human studies have found microplastics in urine and kidney tissue, linked to early signs of kidney damage, though evidence remains limited.
Micro- and Nanoplastics in the Human Exposome: Environmental Pathways, Kidney Toxicity, and Implications for Public Health Risk Assessment
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This review pulls together existing research on tiny plastic particles that enter our bodies through food, water, and air, showing they can build up in organs, especially the kidneys, and potentially cause cell damage and inflammation in lab studies. While these particles have been found in human blood, tissue, and urine, scientists still don't know exactly how much risk this poses to human health, so more research is needed before drawing firm conclusions.
Micro- and nanoplastics and the kidney: exposure pathways, toxicokinetics, and pathophysiological insights
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Tiny plastic particles from our air, water, and food—called micro- and nanoplastics—can enter our bodies and travel to the kidneys, where studies show they may cause cell damage, inflammation, and scarring over time. This review pulls together existing research on how these plastics get into our system and harm kidney tissue, suggesting that everyday plastic exposure could be an overlooked risk factor for kidney disease. More research is needed, but this is an early signal that reducing plastic exposure might matter for long-term kidney health.
Micro- and nanoplastics and the kidney: human evidence, clinical vulnerabilities, dialysis-related exposure, and CKD
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Tiny plastic particles have been found in human kidneys, blood, and urine, and this review pulls together existing research suggesting these particles—along with chemicals like BPA and PFAS often found in plastics—may be linked to kidney damage, high blood pressure, and chronic kidney disease. People on dialysis may face extra exposure because their blood repeatedly contacts plastic tubing and filters during treatment, making them an important group to study further. While the science is still developing, this research highlights why reducing plastic exposure and rethinking medical device materials could matter for protecting kidney health, especially in vulnerable patients.
Microplastics and Kidneys: An Update on the Evidence for Deposition of Plastic Microparticles in Human Organs, Tissues and Fluids and Renal Toxicity Concern
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This review summarizes the growing evidence that microplastics are found throughout the human body, including in the placenta, lungs, liver, heart, blood, and breast milk. While direct evidence for kidney damage in humans is still lacking, animal studies show that microplastics can cause kidney inflammation, cell death, and oxidative stress. The findings highlight that microplastics are accumulating in virtually every human organ, though the long-term health consequences remain unclear.
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