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Epigenetics of Microplastics
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This student-authored paper reviews how microplastics and nanoplastics (MNPs) can alter gene expression and enzyme activity in animals, with particular concern for effects on the liver, brain, and male reproductive system. MNPs act as carriers for toxic chemicals like BPA, phthalates, and heavy metals, which can trigger inflammation, oxidative stress, and potentially cancer when ingested by humans. The paper highlights that human exposure is already occurring through contaminated soil, water, and food, making understanding these epigenetic risks an urgent public health priority.
This research paper highlights the Epigenetics of Microplastics. The paper covers an introduction to microplastics and a few research papers that show the effects of MNPs on animals and humans. Through this study I have speculated on the potential harmful effects of MPs on humans in the future. One thing that is often overlooked is that MNPs have the potential to alter animal and mammal genes. I have talked about a few studies that show this type of alteration of genes and enzymes due to long term and short term exposure to microplastics. MPs have shown to affect the liver and brain the most, which is dangerous because they are both vital organs. Lots of evidence has also been found on Microplastics affecting the male reproductive system, specifically the spermatogenesis in mice and potentially humans. MPs have already been found in our soil, water and food so we are already being exposed to MNPs without even realizing it. While all MNPs are not absorbed by our body, they can still cause harm because of their property to absorb toxic chemicals from their surroundings. MPs have absorbed BPAs, Phthalates, Heavy metals and other chemicals that are a health hazard when ingested by humans. These chemicals can cause inflammation, oxidative stress or in extreme cases, cancer. I have written about methods by which research is helping accumulate the MNPs in our environment but we are yet to figure out how to get rid of them completely. Some ongoing research suggests that there is a worm that contains enzymes,which could break down plastics into useful materials which can be reused, but nothing has been confirmed yet. In the end, I have discussed a few possible areas for further research that can be done on this topic along with my own findings that I have concluded from this research paper.
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This review examines how environmental pollutants, including microplastics, can change gene activity through epigenetic modifications without altering DNA itself. These changes to how genes are turned on and off can contribute to cancer, brain diseases, and developmental problems, and may even be passed down to future generations. The research highlights that microplastics and other common pollutants could have long-lasting health effects that go beyond direct chemical toxicity.
Beyond genetics: can micro and nanoplastics induce epigenetic and gene-expression modifications?
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This review gathers existing research on whether micro and nanoplastics can cause epigenetic changes, which are modifications that alter how genes work without changing the DNA itself. Although studies are still limited, the evidence so far shows that both short-term and long-term plastic particle exposure can trigger these gene-level changes in various organisms. This is concerning because epigenetic changes can potentially be passed to future generations and may contribute to disease.
Untoward Effects of Micro- and Nanoplastics: An Expert Review of Their Biological Impact and Epigenetic Effects
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This expert review examined the biological and epigenetic effects of micro- and nanoplastics on living organisms. The study suggests that while intestinal uptake of plastic particles appears relatively low and size-dependent, nanoplastics may dysregulate molecular signaling pathways, alter gut microbiota composition, and induce transgenerational epigenetic changes potentially linked to metabolic disorders.
Nanoplastics as Epigenetic Disruptors: A Biochemical Review of Environmental Pollutants and Gene Regulation
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This biochemical review examined how nanoplastics disrupt epigenetic regulation, focusing on their ability to alter DNA methylation patterns, histone modifications, and non-coding RNA expression. The authors argued that nanoplastic-induced epigenetic changes could have lasting developmental and health consequences, especially during vulnerable life stages.
Microplastic exposure is associated with epigenomic effects in the model organism Pimephales promelas (fathead minnow)
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Researchers exposed fathead minnows to microplastics and found changes in DNA methylation -- a chemical modification that controls which genes are turned on or off -- across multiple organs including the brain, liver, and gonads. These epigenetic changes are heritable, meaning microplastic exposure could affect not just the exposed fish but also future generations, raising concerns about long-term ecological and evolutionary impacts.
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