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• W4387362022 abstract "Abstract Disclosure: B. Caroccia: None. T.M. Seccia: None. G. Pallafacchina: None. M. Piazza: None. I. Caputo: None. R. Rizzuto: None. G. Rossi: None. A large environmental contamination of drinking water by perfluoroalkyl substances (PFAS) markedly increased by 8-fold the plasma levels of pentadecafluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) in a Northern Italy population with that shows a high prevalence of arterial hypertension and cardiovascular disease. As the link between PFAS and arterial hypertension is unknown, we investigated if they could enhance the biosynthesis of aldosterone, the main mineralocorticoid hormone that has pressor effects. We exposed human adrenocortical carcinoma HAC15 cells to 1 µM or 10 µM concentration of PFOA and PFOS, alone or in combination, for 24, 48 or 72 hours and we measured changes in cell viability, aldosterone synthase (CYP11B2) mRNA, cell and mitochondrial reactive oxygen species (ROS), and aldosterone production in the absence or presence of the superoxide scavenger tempol. Experiments were also performed in the presence of 10 or 100 nM Ang II. We found that PFAS increased CYP11B2 mRNA by 3-fold and aldosterone secretion and mitochondrial ROS production by 2-fold over controls (p &lt; 0.01 for all). PFAS also enhanced the effects of the aldosterone secretagogue Ang II on CYP11B2 mRNA and aldosterone secretion: 10 nM or 100 nM Ang II increased CYP11B2 mRNA by 12- and 52-fold, respectively, compared to vehicle (p &lt; 0.001). Moreover, 1 µM PFAS potentiated the effect of 10 nM or 100 nM Ang II on CYP11B2 gene expression by 30- and 80-fold, respectively (p &lt; 0.001). As the ROS scavenger tempol, which decreased ROS, significantly blunted the CYP11B2 gene expression induced by either PFAS alone, or by concomitant exposure to Ang II and PFAS, the effect of PFAS likely occurs via increased ROS generation. These results indicate that at concentrations mimicking those found in human plasma of exposed individuals, PFAS exert a prooxidant effect and act as potent disruptors of human adrenocortical cell function, thus implicating them as causative factors of human arterial hypertension due to aldosteronism. Presentation: Thursday, June 15, 2023" @default.
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• W4387362022 date "2023-10-01" @default.
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• W4387362022 title "OR06-04 Environmental Pollutants Perfluoroalkyl Acids Potently Stimulated Aldosterone Biosynthesis" @default.
• W4387362022 doi "https://doi.org/10.1210/jendso/bvad114.1050" @default.
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