期刊
NEUROREPORT
卷 19, 期 8, 页码 821-824出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/WNR.0b013e3282ffda72
关键词
beta-catenin; caspase-3; focal ischemia; glycogen synthase kinase-3 beta; stroke
资金
- NINDS NIH HHS [P01 NS037520-08, P01 NS037520, R01 NS027292, R01 NS27292, R01 NS027292-08A2, P01 NS37520] Funding Source: Medline
Beta-catenin can be cleaved by caspase-3 or degraded by activated glycogen synthase kinase-3 beta via phosphorylating beta-catenin. We tested the hypothesis that beta-catenin undergoes degradation after stroke, and its degradation is dependent on caspase activity. Stroke was generated by permanent middle cerebral artery occlusion and 1 h of transient bilateral common carotid artery occlusion in rats. Active caspase-3 was expressed in the ischemic cortex from 5 to 48 h after stroke, whereas P-catenin markedly degraded at 24 and 48h after stroke. The caspase 3-specific inhibitor, Z-DQMD-FMK, attenuated beta-catenin degradation, but it did not affect phosphorylation of both beta-catenin and glycogen synthase kinase-3 beta. In conclusion, beta-catenin degraded after stroke, and its degradation was caspase-3 dependent.
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