Leiden University Scholarly Publications

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Wang, M. (2024)

Developmental effects of polystyrene nanoparticles in the chicken embryo

Doctoral Thesis
There is concern about the threat that nanoplastics (NPs) may pose to both wildlife and humans. This thesis explores the mechanisms of toxicity of polystyrene nanoparticles (PS-NPs) in chicken embryo. In Chapter 1, I review the literature on MPs and NPs, and their potential risks to humans and animals. In Chapter 2, I show that the exposure of chicken embryos to PS-NPs produces malformations in the neural tube, eyes, and tail. Chapter 3 details the heart malformations caused by PS-NPs. I propose that the mechanisms of PS-NP toxicity include the selective binding of PS-NPs to neural crest cells, leading to the death and impaired migration of those cells (Chapter 4). My data support this model, indicating that most of the malformations I observe are in organs that depend for their normal development on neural crest cells. My findings are a matter of concern given the large and growing burden of nanoplastics in the environment, and the fact that they are being considered as drug...Show moreThere is concern about the threat that nanoplastics (NPs) may pose to both wildlife and humans. This thesis explores the mechanisms of toxicity of polystyrene nanoparticles (PS-NPs) in chicken embryo. In Chapter 1, I review the literature on MPs and NPs, and their potential risks to humans and animals. In Chapter 2, I show that the exposure of chicken embryos to PS-NPs produces malformations in the neural tube, eyes, and tail. Chapter 3 details the heart malformations caused by PS-NPs. I propose that the mechanisms of PS-NP toxicity include the selective binding of PS-NPs to neural crest cells, leading to the death and impaired migration of those cells (Chapter 4). My data support this model, indicating that most of the malformations I observe are in organs that depend for their normal development on neural crest cells. My findings are a matter of concern given the large and growing burden of nanoplastics in the environment, and the fact that they are being considered as drug-delivery agents in nanomedicine. They also suggest that NPs may pose a potential health risk to the developing embryo. Further work is needed to determine how PS-NPs become distributed in the body.
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Nanoplastics
Congenital malformation
Neural crest
Neural tube defects
Cardiac malformations
All authors
Wang, M.
Supervisor
Richardson, M.K.; Vijver, M.G.
Committee
Meijer, A.H.; Ruiter, M. de; Rücklin, M.; Briegel, A.; Riebel, K.; Wierckx, N.
Qualification
Doctor (dr.)
Awarding Institution
Institute of Biology Leiden (IBL), Faculty of Science, Leiden University
Date
2024-01-16