Abstract：
UNLABELLED:This study examines the effects of progesterone on blood-brain barrier (BBB) integrity following thrombin administration. Thrombin is expressed in many diseases which affect neural tissue and is associated with breakdown of the BBB. Progesterone has shown protective effects on the BBB in stroke and traumatic brain injury. METHODS:Mouse brain endothelial (bEnd.3) cells were treated with progesterone (20 μmol/l) for 24h before thrombin administration (60 U/ml). BBB permeability was measured by transendothelial electrical resistance (TEER), because TEER decrease is associated with BBB compromise. Tight junction (TJ) proteins (occludin, claudin-5, and zonula occludens-1) and endothelial protein C receptor (EPCR) were analyzed. RESULTS:Thrombin decreased TEER and progesterone prevented that decrease. TJ proteins and EPCR were also decreased after thrombin treatment and progesterone treatment blocked that effect. CONCLUSION:Progesterone can attenuate thrombin-induced BBB disruption by blocking the degradation of TJ proteins and EPCR in bEnd.3 cells.
journal_name
Brain Resjournal_title
Brain researchauthors
Hun Lee J,Won S,Stein DGdoi
10.1016/j.brainres.2015.04.002subject
Has Abstractpub_date
2015-07-10 00:00:00pages
73-80eissn
0006-8993issn
1872-6240pii
S0006-8993(15)00290-5journal_volume
1613pub_type
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