We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Microplastics and Nanoplastics in Human Health: Toxicological Mechanisms Involving Oxidative Stress, Endocrine Interference, and Inflammatory Responses
Summary
Tiny plastic particles called microplastics and nanoplastics are now found everywhere—in our air, water, and food—and this review of existing research shows they may harm our health in three main ways. These particles can damage cells, disrupt hormones, and cause inflammation throughout the body, potentially affecting organs like the heart, liver, and brain. While scientists are still studying exactly how dangerous these plastic particles are to humans, the evidence suggests we should be concerned about our constant exposure to them.
The increasing prevalence of microplastics (MPs) and nanoplastics (NPs) in various environments has raised significant public health concerns worldwide. Defined as plastic particles smaller than 5 mm (MPs) and under 1 μm (NPs), they arise from both industrial manufacturing processes and the breakdown of larger plastic items. MPs and NPs are found in air, water, soil, and food systems, representing an unavoidable source of human exposure. This review synthesizes scientific research on the toxicological effects of MPs and NPs, focusing on three main biological mechanisms: oxidative stress, endocrine disruption, and inflammation. Experimental studies reveal that these plastic particles lead to increased production of reactive oxygen species, resulting in mitochondrial damage, lipid peroxidation, protein oxidation, and DNA injury. Such oxidative effects disrupt critical signaling pathways, including Nrf2, MAPKs, and toll-like receptor-associated pathways. Additionally, MPs and NPs can transport endocrine-disrupting chemicals like bisphenols and phthalates, which interfere with hormone synthesis and neuroendocrine regulation. The particles also trigger innate immune responses by enhancing inflammation through inflammasome activation and prolonged release of inflammatory mediators. The combination of oxidative stress, endocrine disruption, and chronic inflammation has been linked to continuous damage across multiple organ systems, including reproductive, gastrointestinal, hepatic, cardiovascular, and nervous systems. Despite accumulating experimental evidence, there are still considerable knowledge gaps regarding exposure levels, dose-response relationships, and the clinical impacts on humans, which are essential to address for effective risk assessment and regulatory policy development.
Sign in to start a discussion.
More Papers Like This
Microplastics and Nanoplastics in Human Health: Toxicological Mechanisms Involving Oxidative Stress, Endocrine Interference, and Inflammatory Responses
This review of existing research shows that tiny plastic particles from broken-down plastic waste can harm our bodies in three main ways: by damaging cells, disrupting hormones, and causing inflammation. These microscopic plastics are now everywhere in our environment - in the air we breathe, water we drink, and food we eat - and studies suggest they may contribute to health problems affecting our hearts, digestive system, and other organs. While scientists are still studying exactly how dangerous these particles are to humans, the evidence suggests we should be concerned about our constant exposure to plastic pollution.
Adverse Outcome Phenomena and Toxicity Mechanisms of Micro and Nanoplastics in Human Health
This review examines the growing evidence that micro- and nanoplastics can enter the human body through food, water, and air, and may contribute to harmful biological effects. Researchers found that these tiny particles can trigger oxidative stress, inflammation, and disruption of hormonal and immune systems in laboratory studies. The study highlights the need for a unified research approach to better understand how microplastic exposure may affect long-term human health.
A review on microplastics and nanoplastics in the environment: Their occurrence, exposure routes, toxic studies, and potential effects on human health
This review summarizes what is known about how microplastics and nanoplastics enter the human body through food, air, and skin contact, and what they do once inside. Studies on cells and animals show these tiny particles can cause oxidative stress, DNA damage, inflammation, and harm to the immune, digestive, reproductive, and nervous systems. The research makes clear that microplastics are not just an environmental problem but a direct concern for human health.
Cellular and Molecular Mechanisms of Micro- and Nanoplastics Driving Adverse Human Health Effects
This review examines the biological mechanisms by which micro- and nanoplastics may cause harm in humans, including oxidative stress, inflammation, disruption of protective barriers, and immune system problems. Evidence from lab and animal studies suggests these particles can affect the gut, heart, brain, and reproductive systems, though human data is still limited to detecting plastics in tissues rather than proving they cause specific diseases. The authors highlight that most studies use higher doses than people actually encounter, making it important to develop research models that better reflect real-world chronic exposure.
Microplastics and Nanoplastics in Health Concerning Cellular Toxicity Mechanisms, Exposure Pathways, and Global Mitigation Strategies
This review synthesizes current knowledge on how micro- and nanoplastics cause cellular damage in the human body, covering mechanisms like oxidative stress, inflammation, DNA damage, and disruption of cell signaling pathways. Researchers note that exposure occurs through multiple routes including ingestion and inhalation, allowing particles to reach organs throughout the body. The study highlights significant gaps in understanding long-term and low-dose exposure effects that are most relevant to everyday human contact with these particles.