Activation and up-regulation of nitric oxide synthase in human umbilical vein endothelial cells by polycyclic aromatic hydrocarbons
Journal
Toxicology Letters
Journal Volume
151
Journal Issue
2
Pages
367-374
Date Issued
2004
Author(s)
JAW-JOU KANG
Abstract
PAHs, including naphthalene, fluoranthene and fluorene rapidly induced extracellular Ca(2+) influx and hence elevation of intracellular Ca(2+) concentration and NO production. The effect can be inhibited by Ca(2+) channel blocker but not by P450 inhibitor. In addition to the rapid effect, we have also found that the eNOS mRNA and protein expression were augmented in HUVECs treated with PAHs at concentration as low as 0.1 microM for 24 h. These effects were abolished when the HUVECs were pretreated with the BAPTA, NiCl(2) and SKF96365, as well as SKF525A. Our results revealed that, for the first time, PAHs induce the activation of eNOS and enhance eNOS protein expression in HUVECs both in a Ca(2+)-dependent manner.
SDGs
Type
journal article