Lab Anim Res.  2012 Sep;28(3):199-204. 10.5625/lar.2012.28.3.199.

Gingko biloba extract (EGb 761) attenuates ischemic brain injury-induced reduction in Ca2+ sensor protein hippocalcin

  • 1Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Sciences, Gyeongsang National University, Jinju, Korea.


Gingko biloba extract 761 (EGb 761) protects neuronal cells from ischemic brain injury via a number of neuroprotective mechanisms. Hippocalcin is a calcium sensor protein that regulates intracellular calcium concentrations and apoptotic cell death. We investigated whether EGb 761 regulates hippocalcin expression in cerebral ischemia. Male Sprague-Dawley rats were treated with vehicle or EGb 761 (100 mg/kg) prior to middle cerebral artery occlusion (MCAO), and cerebral cortex tissues were collected 24 h after MCAO. A proteomic approach demonstrated reduction in hippocalcin expression in vehicle-treated animals during MCAO, whereas EGb 761 treatment prevented injury-induced decreases in hippocalcin expression. RT-PCR and Western blot analyses indicated that EGb 761 attenuates injury-induced decrease in hippocalcin. These results suggest that the maintenance of hippocalcin during cerebral ischemia contributes to the neuroprotective role of EGb 761.


EGb 761; hippocalcin; neuroprotection
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