1. Endoplasmic reticulum in the penumbra following middle cerebral artery occlusion in the rabbit
- Author
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Ying Li, Cang-Hai Wang, Ji-Ping Yang, Rui-Chun Liu, Chun-Yan Li, and Huaijun Liu
- Subjects
Male ,Pathology ,medicine.medical_specialty ,Time Factors ,Ischemia ,Infarction ,Apoptosis ,Dermatology ,Endoplasmic Reticulum ,medicine.artery ,Occlusion ,medicine ,Animals ,Cerebrum ,Caspase 12 ,business.industry ,Endoplasmic reticulum ,Penumbra ,Infarction, Middle Cerebral Artery ,General Medicine ,medicine.disease ,Immunohistochemistry ,Psychiatry and Mental health ,medicine.anatomical_structure ,Reperfusion Injury ,Anesthesia ,Middle cerebral artery ,Rabbits ,Neurology (clinical) ,business ,Reperfusion injury ,Follow-Up Studies - Abstract
Caspase-12 has been localized to endoplasmic reticulum (ER) and showed to involve ER stress-induced apoptosis. In the present work we investigated the temporospatial alterations of caspase-12 immunoreactivity in the penumbra following cerebral ischemia/reperfusion in rabbit. Transient cerebral ischemia was produced by intraluminal occlusion of the middle cerebral artery for 2 h followed by 1 h, 6 h, 1 day, 3 days, 7 days and 14 days of reperfusion. Caspase-12 immunohistochemistry was first increased in the penumbra 1 h after reperfusion, with a peak at day 1 to day 3, and then gradually decreased to basal level at day 14. The number of TUNEL-positive cells and ultrastructural observation of brain sections in the penumbra showed a similar change at the same time points. ER mediated by caspase-12 participated in apoptosis induced by cerebral ischemia/reperfusion injury, which may provide a new area for therapeutic intervention to ameliorate outcomes following cerebral ischemia.
- Published
- 2009