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Inhibitory Effect against Angiotensin Converting Enzyme and Antioxidant Activity of Panax ginseng C. A. Meyer Extracts  

Lee, Seung-Eun (National Crop Experiment Station, RDA)
Seong, Nak-Sul (National Crop Experiment Station, RDA)
Bang, Jin-Ki (National Crop Experiment Station, RDA)
Kang, Seung-Won (National Crop Experiment Station, RDA)
Lee, Sung-Woo (National Crop Experiment Station, RDA)
Chung, Tae-Yung (Department of Food Science and Nutrition, Pusan National University)
Publication Information
Korean Journal of Medicinal Crop Science / v.11, no.3, 2003 , pp. 236-245 More about this Journal
Abstract
The study was performed for elucidating angiotensin converting enzyme (ACE) inhibitory activity and comparing antioxidative activity of Panax ginseng extracts prepared at different conditions. Total phenolic content, inhibitory activity on ACE and antioxidative effects were tested on 10 ethanolic extracts and correlation coefficient between total phenolic content and physiological activity was calculated. Yield and total phenolic content of 50% ethanolic extract prepared at $85^{\circ}C$ exhibited the highest value as 42.52% and 0.82%, respectively. Among the fractions obtained from 50% ethanolic extract prepared at room temperature, water fraction showed the highest value in yield as 72.08% and ethyl acetate fraction did in total phenolic content as 6.59%. In the test on ACE inhibitory activity, 50% ethanolic extract obtained at room temperature indicated the strongest effect of 93.8% which was higher than 85.2% of commercialized ACE inhibitor and solvent fractions showed potent inhibitory activity in order of hexane fraction, diethyl ether fraction, ethyl acetate fraction, butanol fraction and water fraction at concentration of $4000{\mu}g/ml$. 50% Ethanolic extract prepared at $85^{\circ}C$ had the most potent inhibition effect on human LDL oxidation as 78.2% at $200{\mu}g/ml$ and the other extracts also did above 60%. Diethyl ether fraction and ethyl acetate fraction showed strong inhibition activity $(34.38%{\sim}78.13%)$ on LDL oxidation at concentration of $10{\sim}200\;{\mu}g/ml$. From the statistical analysis via SAS program, correlation coefficient between total phenolic content and ACE inhibitory effect was 0.6353 at P<0.05. Conclusively, this report showed that the most efficient extraction condition for elevating inhibitory activity on ACE and LDL oxidation, phenolic content and yield from Panax ginseng was 50% ethanol extraction at room temperature or high temperature condition. And Panax ginseng would be used for preventing hypertension or atheroscrelosis for man via inhibitory action on ACE and LDL oxidation.
Keywords
Panax ginseng; angiotensin converting enzyme; ACE inhibitory activity; low density lipoprotein; LDL oxidation; total phenolic content; antioxidant;
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