期刊
REPRODUCTIVE TOXICOLOGY
卷 106, 期 -, 页码 42-50出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.reprotox.2021.10.002
关键词
Microplastics; Reproductive toxicity; Pregnancy failure; Immune disturbance
资金
- National Key Research and Development Program of China [2018YFC1002803]
- National Natural Science Foundation of China [81401274, 81974243]
- Shanghai Science and Technology Commission [17411972700, 18411963200, 20Y11908000]
The study revealed the adverse effects of polystyrene microplastics on pregnancy outcomes, disrupting immune system balance, leading to increased embryo resorption rate, decreased uterine blood supply, altered macrophage subtype ratio, and a shift towards immunosuppressive cytokine secretion.
Microplastics (MPs), which are emerging as a new type of environmental pollutants, have raised great concerns regarding their threats to human health. A successful pregnancy depends on the sophisticated regulation of the maternal-fetal immune balance, but the risks of polystyrene MP (PS-MP) exposure in early pregnancy remain unclear. In this study, we exposed the C57BL/6-mated BALB/c mice to PS-MP particles and used the flow cytometry to explore threats towards the immune system. Herein, the allogeneic mating murine model showed an elevated embryo resorption rate with a 10 mu m PS-MP particle exposure during the peri-implantation period. Both the number and diameter of uterine arterioles decreased, which might reduce the uterine blood supply. Moreover, the percentage of decidual natural killer cells was reduced, whereas the helper T cells in the placenta increased. In addition, the M1/M2 ratio in macrophages reversed significantly to a dominant M2-subtype. Lastly, the cytokine secretion shifted towards an immunosuppressive state. Overall, our results demonstrated that PSMPs have the potential to cause adverse effects on pregnancy outcomes via immune disturbance, providing new insights into the study of reproductive toxicity of MP particles in the human body.
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