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http://dx.doi.org/10.3746/jkfn.2008.37.1.27

Angiotensin Converting Enzyme Inhibition and Antihypertensive Effects of Phyllostachys pubescens Culm Extracts in Spontaneously Hypertensive Rats  

Kim, Jung-Suk (School of Food and Life Science, and Biohealth Products Research Center and Food Science Institute, Inje University)
Kim, Mi-Jeong (BK21 Smart Food and Drug Center, Inje University)
Park, Min-Hee (School of Food and Life Science, and Biohealth Products Research Center and Food Science Institute, Inje University)
Ryu, Bog-Mi (Dept. of Food Science Institute, Inje University)
Moon, Gap-Soon (School of Food and Life Science, and Biohealth Products Research Center and Food Science Institute, Inje University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.37, no.1, 2008 , pp. 27-34 More about this Journal
Abstract
This study investigated the anti-hypertensive effect of Phyllostachys pubescens culm extract (PCE) by examining its effects on renal angiotensin-converting enzyme (ACE) inhibition and blood pressure using the spontaneously hypertensive rat (SHR) system. Systolic blood pressure (SBP) and diastolic blood pressure (DBP) were measured weekly for 8 weeks. Also, total antioxidant capacity and protein oxidation of tissues were examined by plasma Trolox Equivalent Antioxidant Capacity assay (TEAC) and hepatic protein carbonyl values, respectively. Twenty male SHR were randomly divided into four groups: PCE50, PCE100, and PCE500 (50, 100, and 500 mg of PCE per kilogram bodyweight daily, respectively), and control group. At week 2, the SBP in all PCE groups appeared to be significantly lower than the control (p<0.05), whereas the DBP were not different until week 4 (p<0.05). At week 8, SBP in the PCE500 was lower by 20% than the control. PCE groups considerably suppressed ACE dose-dependently compared with the control. Plasma TEAC and hepatic protein carbonyl values indicated increased antioxidative activity due to the PCE feed. No adverse effect was observed on the liver of SHR as there was no difference for the GOT and GPT values among the groups. Results of this study suggest that ACE inhibition may be one possible mechanism for the blood pressure lowering effect of PCE; thus, long term consumption of PCE may be beneficial in preventing high blood pressure along with the increased antioxidative status.
Keywords
Phyllostachys pubescens culm (PCE) extract; ACE inhibitory activity; antioxidant effect; blood pressure; hypertension;
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