ArticlebioRxiv : the preprint server for biology2025
Micro and nanoplastic inhalation during pregnancy elicits uterine endothelial dysfunction in Sprague Dawley rats by impeding nitric oxide signaling.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Micro and nanoplastic (MNP) detection in human tissues demonstrates that exposure at any life stage is inevitable. We have previously demonstrated that pulmonary exposure to this emerging environmental contaminant impairs endothelial function in the uterine vasculature of nonpregnant and pregnant rats. However, neither the mechanism of this dysfunction nor the role of the endothelial-derived vasodilator, nitric oxide (NO), have been interrogated. Therefore, we assessed uterine macro- and microvascular reactivity in Sprague Dawley rats to determine the mechanistic role of NO signaling in endothelial dysfunction after repeated (gestational day 5-19) MNP inhalation during pregnancy. Results identified that MNP exposure reduced fetal growth and impaired endothelial-dependent dilation in the uterine microcirculation, which control placental perfusion and resource availability to the fetus. Levels of activated endothelial nitric oxide synthase (eNOS), phosphorylated on Ser
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