Using one particulate zinc oxide (ZnO) and two soluble zinc compounds (Zn(NO(3))(2) and Zn(CH(3)COO)(2)), we aimed to clarify if zinc ions (Zn(2+)), like particulate ZnO, caused inflammatory responses in vascular endothelial cells. Treatments of human umbilical vein endothelial cells (HUVECs) with 368.6 muM of each zinc compound caused marked increases in IkappaBalpha phosphorylation and intercellular adhesion molecule-1 (ICAM-1) expression. Treatments with Zn(CH(3)COO)(2) (50-350 muM) induced a dose-dependent ICAM-1 expression. These results show that Zn(2+) alone is sufficient to induce similar levels of ICAM-1 expression as ZnO particles, suggesting that dissolved Zn(2+) may play the major role in inflammatory effect of ZnO particles on vascular endothelial cells.
Date:
2011-08
Relation:
Bulletin of Environmental Contamination and Toxicology. 2011 Aug;87(2):113-116.
