Gingko bilobaExtract (EGb 761) Prevents Ischemic Brain Injury by Activation of the Akt Signaling Pathway

Jae-Hyeon Cho, Jin-Hee Sung, Eun-Hae Cho, Chung-Kil Won, Hyo-Jong Lee, Myeong-Ok Kim, Phil-Ok Koh
2009 THE American journal of Chinese medicine  
EGb 761 is a standardized extract of Gingko biloba that exerts protective effects against ischemic brain injury. This study investigated whether EGb 761 modulates the neuroprotective effects through Akt and its downstream targets, Bad and FKHR. Adult male rats were treated with EGb 761 (100 mg/kg) or vehicle prior to middle cerebral artery occlusion (MCAO). Brains were collected 24 hours after MCAO and infarct volumes were analyzed. EGb 761 significantly reduced infarct volume. Potential
more » ... ion was mearsured by phosphorylation of Akt at Ser 473 , Bad at Ser 136 , and FKHR at Ser 256 using Western blot analysis. EGb 761 prevented the injury-induced decrease of pAkt and its down stream targets, pBad and pFKHR. Furthermore, EGb 761 prevented the injury-induced increase of cleaved caspase-3 levels. In conclusion, this study suggests that EGb 761 prevents cell death due to brain injury and that EGb 761 protection is affected by preventing the injury-induce decrease of Akt phosphorylation.
doi:10.1142/s0192415x09007041 pmid:19606514 fatcat:yh2ulqumjrhblefbfcgev2vjoy