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TheScientificWorldJOURNAL
Volume 11 (2011), Pages 1056-1067
http://dx.doi.org/10.1100/tsw.2011.98
Research Article

Effect of Lipoxin A4 on Lipopolysaccharide-Induced Endothelial Hyperpermeability

1Department of Obstetrics and Gynecology, First Affiliated Hospital of Wenzhou Medical College, Wenzhou, Zhejiang, China
2Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China

Received 20 December 2010; Revised 4 April 2011; Accepted 7 April 2011

Academic Editor: Joan Clària

Copyright © 2011 Huayan Pang et al.

Abstract

Excessive oxidative stress, decreased antioxidant capacity, and enhanced cellular calcium levels are initial factors that cause endothelial cell (EC) hyperpermeability, which represents a crucial event in the pathogenesis of pre-eclampsia. Lipoxin A4 (LXA4) strongly attenuated lipopolysaccharide (LPS)-induced hyperpermeability through maintaining the normal expression of VE-cadherin and β-catenin. This effect was mainly mediated by a specific LXA4 receptor. LXA4 could also obviously inhibit LPS-induced elevation of the cellular calcium level and up-regulation of the transient receptor potential protein family C 1, an important calcium channel in ECs. At the same time, LXA4 strongly blocked LPS-triggered reactive oxidative species production, while it promoted the expression of the NF-E2 related factor 2 (Nrf2) protein. Our findings demonstrate that LXA4 could prevent the EC hyperpermeability induced by LPS in human umbilical vein endothelial cells (HUVECs), under which the possible mechanism is through Nrf2 as well as Ca2+-sensitive pathways.