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Hematological impacts of environmental toxicants and sustainable strategies for prevention
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Researchers reviewed how environmental toxicants — including microplastics, heavy metals, pesticides, and PFAS — damage the blood-forming system by causing oxidative stress, DNA damage, and immune disruption. The review emphasizes that the blood system is especially vulnerable because it continuously produces new cells that are directly exposed to circulating toxins.
Environmental toxicants represent a growing global health challenge due to their ubiquity, environmental persistence, and the complexity of human exposures. A wide spectrum of contaminants, including heavy metals, benzene and related organic solvents, pesticides, dioxins, particulate matter, and emerging pollutants such as PFAS, engineered nanomaterials, and microplastics, contaminate air, water, soil, and food chains. These exposures occur at chronic low doses and disproportionately affect vulnerable populations. The hematopoietic system is particularly susceptible because hematopoietic stem and progenitor cells continuously proliferate and directly interact with circulating toxicants and their metabolites. This narrative review synthesizes literature from 2000 to 2025 to examine how major environmental toxicants disrupt hematopoiesis, immunity, and leukemogenic pathways through oxidative stress, enzymatic inhibition, genotoxicity, immune dysregulation, epigenetic alterations, and microenvironmental injury. In parallel, it evaluates sustainable prevention strategies, including advanced water and soil remediation technologies, air pollution control, regulatory frameworks, occupational protections, biomonitoring systems, circular-economy models, and green-chemistry innovations. Future priorities include developing predictive multi-omics biomarkers, strengthening global biomonitoring, advancing safe-by-design chemical innovation, and enhancing regulatory enforcement within sustainability and planetary-health frameworks. Addressing these gaps is essential for mitigating hematotoxic risks and safeguarding population health.
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The Impact of Micro/Nanoplastics on Human Hematopoietic Function: Exposure, Deposition, Toxicity, and Mitigation Strategies
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Researchers reviewed how micro- and nanoplastics enter the body via diet and inhalation and accumulate in blood cells and hematopoietic organs, synthesizing animal and in vitro evidence that these particles disrupt red and white blood cell production through oxidative stress and inflammatory signaling while also exploring biodegradation and dietary mitigation strategies.
Hematological consequences of polyethylene microplastics toxicity in male rats: Oxidative stress, genetic, and epigenetic links
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Researchers gave male rats different doses of polyethylene microplastics orally for 35 days and found significant damage to blood cells and the blood-forming system. Higher doses caused oxidative stress, DNA damage, and changes in gene expression patterns related to blood cell production. The study suggests that chronic microplastic ingestion could harm the blood system through both genetic and epigenetic pathways.
Beyond oxidative stress: Emerging molecular mechanisms and translational perspectives in environmental toxicant-induced hematotoxicity
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This review pulls together research showing that everyday environmental exposures, like heavy metals, pesticides, air pollution, PFAS ("forever chemicals"), and microplastics, can damage your blood and bone marrow through several different biological pathways, not just the "oxidative stress" (cell damage from unstable molecules) that scientists used to focus on. This matters because it means these toxicants may be harming blood cell production and immune health in more complex ways than previously thought, which could explain why some people develop blood disorders while others don't. The good news: new technologies like AI and advanced lab testing may soon help doctors catch these hidden eff
Polystyrene micro-/nanoplastics induced hematopoietic damages via the crosstalk of gut microbiota, metabolites, and cytokines
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Researchers exposed mice to polystyrene micro- and nanoplastics and found that the particles caused damage to the blood-forming system through disruption of gut bacteria, metabolic changes, and inflammatory signaling. Smaller nanoplastics caused more severe effects than larger microplastics, altering gut microbial communities and triggering systemic inflammation. The study reveals a previously unknown pathway by which ingested plastic particles may harm the body's ability to produce healthy blood cells.
The impact of micro- and nanoplastics on immune system development and functions: Current knowledge and future directions
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This review summarizes existing research on how micro- and nanoplastics affect the immune system, finding that exposure can disrupt blood cell development, alter immune cell behavior, and trigger inflammatory responses in lab and animal studies. While some studies show significant effects on organs like the spleen and intestines, others found minimal impact at environmentally realistic exposure levels, highlighting the need for more standardized research.
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