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Cadmium exposure alters steroid receptors and proinflammatory cytokine levels in endothelial cells in vitro: a potential mechanism of endocrine disruptor atherogenic effect

Authors
  • Fittipaldi, S.1
  • Bimonte, V. M.2, 3
  • Soricelli, A.1, 4
  • Aversa, A.3
  • Lenzi, A.5
  • Greco, E. A.5
  • Migliaccio, S.2
  • 1 IRCCS SDN, Naples, Italy , Naples (Italy)
  • 2 “Foro Italico” University of Rome, Department of Movement, Human and Health Sciences, Section of Health Sciences, Largo Lauro De Bosis 6, Rome, 00195, Italy , Rome (Italy)
  • 3 Magna Græcia University, Department of Experimental and Clinical Medicine, Catanzaro, Italy , Catanzaro (Italy)
  • 4 University of Naples Parthenope, Department of Motor Sciences and Healthiness, Naples, Italy , Naples (Italy)
  • 5 “Sapienza” University of Rome, Department of Experimental Medicine, Section of Medical Pathophysiology, Endocrinology and Nutrition, Rome, Italy , Rome (Italy)
Type
Published Article
Journal
Journal of Endocrinological Investigation
Publisher
Springer-Verlag
Publication Date
Nov 26, 2018
Volume
42
Issue
6
Pages
727–739
Identifiers
DOI: 10.1007/s40618-018-0982-1
Source
Springer Nature
Keywords
License
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Abstract

BackgroundCadmium (Cd) is a widespread environmental pollutant that causes alterations in human health acting as endocrine disruptor. Recent data suggest that cardiovascular system might be a contamination target tissue, since Cd is found in atheromatic plaques. Thus, the purpose of this study was to evaluate the consequence of Cd exposure of endothelial cells in vitro to evaluate detrimental effect in vascular system by a potential sex-steroid hormone receptor-dependent mechanism(s).MethodsTo this aim, Human Umbilical Vein Endothelial Cells (HUVECs) were cultured and exposed to several concentrations of cadmium chloride (CdCl2) for different interval times.ResultsCdCl2 exposure of HUVECs induced a significant increase of ERβ and Cyp19a1 at both mRNA and protein levels, while a drastic dose-dependent decrease of AR expression level was observed after 24 h of exposure. On the contrary, an increase of PhARser308 as well as a reduction of PhGSK-3βser9 and PhAKTser473 was detected after 1 h treatment. This effect was consistently reduced by GSK inhibition. Furthermore, CdCl2 abolished DHT-induced cell proliferation in HUVECs suggesting an antagonist-like effect of Cd on AR-mediated signaling. Remarkable, after 6 h CdCl2—treatment, a relevant increase in TNF-α, IL-6 and IL-8 mRNA was observed and this effect was blocked by the presence of an ERβ-selective antagonist. Moreover, Cd-induced TxR1 overexpression, likely, correlated with the activation of p38 MAPK/NF-κB pathway.ConclusionIn conclusion, our study demonstrates for the first time that Cd alters sex-steroid hormone receptors level and activity likely affecting intracellular signaling linked to a proinflammatory state in endothelial cells. This alteration might possibly lead to endothelial cell injury and vascular dysfunction and could be a mechanism of gender-specific atherogenic damages induced by endocrine disruptors and, thus, induce atherogenic events with increased risk of cardiovascular diseases in individuals exposed to this endocrine disruptor.

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