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© Research
Publication : Free radical biology & medicine

Protective effects of peroxiredoxin-1 at the injured blood-brain barrier

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Free radical biology & medicine - 16 Apr 2008

Schreibelt G, van Horssen J, Haseloff RF, Reijerkerk A, van der Pol SM, Nieuwenhuizen O, Krause E, Blasig IE, Dijkstra CD, Ronken E, de Vries HE

Link to Pubmed [PMID] – 18452719

Free Radic. Biol. Med. 2008 Aug;45(3):256-64

Reactive oxygen species (ROS) play a pivotal role in the development of neuroinflammatory disorders, such as multiple sclerosis (MS). Here, we studied the effect of ROS on protein expression in brain endothelial cells (BECs) using proteomic techniques and show that long-term exposure to ROS induces adaptive responses in BECs to counteract an oxidative attack. ROS induce differential protein expression in BECs, among which is peroxiredoxin-1 (Prx1). To further study the role of Prx1 we established a BEC line overexpressing Prx1. Our data indicate that Prx-1 overexpression protects BECs from ROS-induced cell death, reduces adhesion and subsequent transendothelial migration of monocytes by decreasing intercellular adhesion molecule-1 expression, and enhances the integrity of the BEC layer. Interestingly, vascular Prx1 immunoreactivity was markedly upregulated in inflammatory lesions of experimental autoimmune encephalomyelitis (EAE) animals and active demyelinating MS lesions. These findings indicate that enhanced vascular Prx1 expression may reflect the occurrence of vascular oxidative stress in EAE and MS. On the other hand, it may function as an endogenous defense mechanism to inhibit leukocyte infiltration and counteract ROS-induced cellular injury.

https://www.ncbi.nlm.nih.gov/pubmed/18452719