Role of protease-activated receptor-1 in brain injury after experimental global cerebral ischemia.

Abstract:

BACKGROUND AND PURPOSE:Evidence suggests that the protease-activated receptor-1 (PAR-1), a thrombin receptor, mediates neuronal injury in experimental cerebral ischemia. The present study investigated whether PAR-1 plays a role in brain injury after global cerebral ischemia. METHODS:Adult male wild-type or PAR-1 knockout mice underwent a 20-minute bilateral common carotid artery occlusion or a sham operation. Behavior tests were performed before ischemia and 1, 2, and 3 days after bilateral common carotid artery occlusion. Mice were euthanized at different time points for thrombin activity, brain edema, Western blot analysis, and brain histology. RESULTS:Thrombin activity and PAR-1 expression were increased in the brain after bilateral common carotid artery occlusion. Compared with wild-type mice, PAR-1 knockout mice had less brain edema formation, neuronal death, and behavior impairment after bilateral common carotid artery occlusion. In addition, bilateral common carotid artery occlusion-induced activation of mitogen-activated protein kinases was absent in PAR-1 knockout mice. CONCLUSIONS:PAR-1 contributes to the brain injury induced by global cerebral ischemia, which may be related to activation of mitogen-activated protein kinases.

journal_name

Stroke

journal_title

Stroke

authors

Wang J,Jin H,Hua Y,Keep RF,Xi G

doi

10.1161/STROKEAHA.112.661819

subject

Has Abstract

pub_date

2012-09-01 00:00:00

pages

2476-82

issue

9

eissn

0039-2499

issn

1524-4628

pii

STROKEAHA.112.661819

journal_volume

43

pub_type

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