Abstract
Abies koreana Wilson (A. koreana) is a shrub or broadly pyramidal evergreen tree endemic in the mountainous regions of South Korea. We obtained the essential oil (EO) from alpine needle leaves of A. koreana by the supercritical fluid extraction (SFE) method. EO was analyzed by gas chromatography-mass spectrometry (GC-MS), and 68 compounds were identified constituting 95.66% of the oil. The major components were elemol (11.17%), terpinen-4-ol (9.77%), sabinene (8.86%), 10(15)-cadien-4-ol (7.16%), alpha-terpineol (6.13%), alpha-pinene (6.07%) and gamma-terpinene (4.71%). To investigate the memory-enhancing effects, we conducted a passive avoidance test using a scopolamine (1 mg/kg, ip)-induced amnesia mouse model. A peritoneal injection of EO from A. koreana (100 mg/kg) showed a memory enhancing effect of 72.7% compared with the control. These results suggest that EO of A. koreana may be a useful therapeutic agent against such amnesia-inducing diseases as Alzheimer and vascular dementia.
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