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Microplastics: A threat for developing and repairing organs?
Summary
This review examines how micro- and nanoplastics may affect organ development and repair in humans and animals. Researchers found evidence that these particles and their chemical additives can disrupt critical developmental processes in multiple organs, including during fetal development via placental exposure. The study suggests that micro- and nanoplastics pose particular risks during early developmental windows and when the body is attempting to regenerate damaged tissue.
Abstract Plastic production has greatly increased in the past decades and has become central to modern human life. Realization is dawning that plastics break down into smaller pieces resulting in micro- or nanoplastics (MNP) that can enter humans directly via the environment. Indeed, MNP have been detected in every part of the human body, including the placenta, which is concerning for development. Early developmental stages are crucial for proper growth and genome programming. Environmental disruptors in MNP can have detrimental effects during this critical window as well and can increase the risk of developing disease and dysfunction. In addition, MNP may impact situations in which developmental pathways are reactivated after birth such as during organ repair. Currently, there is no overview of how MNP can impair (human) development and repair. Therefore, we provide an extensive overview of available evidence on MNP impacting developmental and regenerative processes in various organs in humans and rodent models. In addition, we have included the impact of some additives that can leach from these MNP. We conclude that MNP and their additives can have modulating effects on developing and regenerating organs.