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Human Embryos, Induced Pluripotent Stem Cells, and Organoids: Models to Assess the Effects of Environmental Plastic Pollution

Frontiers in Cell and Developmental Biology 2021 11 citations

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This review evaluated human embryos, induced pluripotent stem cells, and organoids as models for studying plastic pollution health effects, arguing that these human-derived systems better capture species-specific molecular responses to micro- and nanoplastics than conventional animal models and should be prioritized in risk assessment research.

Study Type In vitro

For a long time, animal models were used to mimic human biology and diseases. However, animal models are not an ideal solution due to numerous interspecies differences between humans and animals. New technologies, such as human-induced pluripotent stem cells and three-dimensional (3D) cultures such as organoids, represent promising solutions for replacing, refining, and reducing animal models. The capacity of organoids to differentiate, self-organize, and form specific, complex, biologically suitable structures makes them excellent in vitro models of development and disease pathogenesis, as well as drug-screening platforms. Despite significant potential health advantages, further studies and considerable nuances are necessary before their clinical use. This article summarizes the definition of embryoids, gastruloids, and organoids and clarifies their appliance as models for early development, diseases, environmental pollution, drug screening, and bioinformatics.

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This review examines how lab-grown miniature organ models, called organoids, are being used to study the health effects of micro- and nanoplastic exposure on human tissues. Evidence from brain, heart, lung, liver, kidney, and intestinal organoid models shows that plastic particles can cause oxidative stress, inflammation, cell death, and impaired tissue development. The technology offers a more realistic way to study plastic toxicity compared to traditional cell culture or animal experiments.

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Application of organoid technology in the human health risk assessment of microplastics: A review of progresses and challenges

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This review examines how organoid technology -- miniature lab-grown versions of human organs made from stem cells -- can be used to study the health effects of microplastics more accurately than traditional animal testing. Organoids of the gut, lung, brain, liver, and other organs can better predict how microplastics affect human tissues, potentially accelerating our understanding of the real health risks these particles pose.

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Unveiling the effects of micro and nano plastics in embryonic development

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Researchers reviewed how microplastics and nanoplastics can disrupt early embryo development, triggering inflammation, neurotoxicity, and abnormal cell differentiation in developing organisms. Because human embryos cannot be directly studied, 3D lab models called embryoid bodies — grown from stem cells — are emerging as an ethical and effective way to test plastic toxicity.

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