Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Powder, 50% Ethanol and Hot Water Extracts of Gastrodiae Rhizoma on Serum Lipids and Blood Pressure in SHR Fed High-Fat Diet

천마 분말, 에탄올 및 열수추출물이 본태성고혈압쥐(SHR)의 혈청지질과 혈압에 미치는 영향

  • Published : 2003.10.01
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Abstract

This study was carried out to investigate the effect of Gastrodiae Rhizoma (G. Rhizoma) on blood pressure-lowering in spontaneously hypertensive rats (SHR) fed high-fat diet supplemented with 10% (w/w) of lard during the experimental period of 8 weeks. Forty of male SHR weighing approximately 100 g were randomly divided into eight groups; A: negative control (lard 10%), B: positive control (lard 10% ＋ basal diet ＋ 5 brix water extract), C: lard 10% ＋ 1% G. Rhizoma powder, D: lard 10%＋5% G. Rhizoma powder, E: lard 10%＋2 brix 50% ethanol extract, F: lard 10%＋10 brix 50% ethanol extract, G: lard 10%＋2 brix water extract, H: lard 10% ＋ 10 brix water extract. A gain in weight did not differ significantly among dietary groups, but a little higher in control groups than in G. Rhizoma dietary groups. Except for spleen, weights of liver, kidney and testis are significantly different among dietary groups. Serum total cholesterol concentration was markedly higher in control groups than in G. Rhizoma groups (p<0.05), however, there was no significant difference in serum triglyceride. Except for negative control (A) and group D, serum HDL concentration was significantly higher in G. Rhizoma groups (p<0.05). On the other hand, serum LDL concentration was significantly higher in two control groups (A, B) and markedly lower in E and G groups of hot water extract of G. Rhizoma (p<0.05). Reference systolic blood pressure (BP) showed average 185.7$\pm$5.8 mmHg for 4 weeks after feeding high-fat diet, and the pressure was measured on every 7 days intervals after feeding of G. Rhizoma diet. Comparing with reference BP before feeding of G. Rhizoma diet, the groups of 50% ethanol (E, F) and water (G) extracts on BP level after 28 days were shown to be reduced at 16.8, 20.2 and 11.7 mmHg, respectively. When the pressure (187 mmHg) of group A was considered as 100%, the reduction rate of BP in group F was 11% (20.5 mmHg). These results indicated that the groups treated with ethanol extracts of G. Rhizoma showed to have lower blood pressure level compacred to the groups treated with whole powder or water extracts of G.Rhizoma in SHR fed with high-fat diet.

본 연구는 천마가 혈압에 미치는 영향을 평가하기 위하여 본태성고혈압쥐(SHR/NCrj)를 공시하여 고지방식이(lard, 10%)를 급여하면서 천마 분말과 50% 에탄올과 열수추출물이 수축기 혈압(systolic blood pressure)에 미치는 영향을 조사하였다. 고지방식이 4주와 고지방식 이와 천마식이 4주 등 총 8주간 시험 후 종료체중은 대조군(A)이 통계적으로 가장 높았고(p<0.05), 천마분말 1%군(C)이 가장 낮았다. 평균 성장률은 식이군간 차이가 없었고 대조군이 천마식이군에 비해 다소 높았다. 식이섭취량은 천마분말 10%군(D)과 열수추출물 2 brix군(G)이 가장 많았고 천마분말 5%군(C)과 열수추출물 10 brix군(H)이 유의하게 낮았다(P<0.05). 장기중 간장과 신장무게는 열수추출물군(H)이 유의하게 낮았고(p<0.05), 비장무게는 차이가 없었다. 정소무게는 천마분말군(C,D)이 유의하게 높았고, 열수추출물군(G, H)이 가장 낮았다(p<0.05). 혈청지질중 TC 함량은 대조군(A, B)이 가장 높았고, 천마식이군이 유의하게 낮았다(p<0.05). TG 함량은 식이군간 통계적인 차이가 없었다. HDL 함량은 대조군(A)과 천마분말 5%군(D)을 제외한 천마식이군이 유의하게 높은 반면(p<0.05), LDL 함량은 대조군(A, B)이 가장 높았고, 열수추출물군(E, G)이 유의하게 낮았다(p<0.05). 천마식이를 급여하기 전(생후 약 8주령)모든 SHR의 기준혈압은 176.7∼195.1 mmHg으로, 평균혈압은 185.7 $\pm$ 5.8 mmHg이었다. 천마식이를 급여한 후 14일이 경과시 50% 에탄올추출물군(F)과 열수추출물군(G, H)에서 혈압이 각각9.5, 19.0, 10.9 mmHg 감소하였고, 28일에는 특히 50% 에 탄올추출물군(E, F)에서 각각 13.1, 10.5 mmHg으로 유의하게 감소하였다. 천마식이 급여 전 기준혈압 대비 감소율은 50%에탄올(E, F)과 열수추출물군(G)에서 각각 16.8, 20.2, 11.7 mmHg으로써 유의한 혈압변화로 인정되었다. 이상의 결과에서 고지방식이를 급여한 SHR 실험쥐의 혈압강하에 천마의 50% 에탄올추출물(F)이 천마의 분말식이 및 열수추출물에 비해 수축기혈압을 유의하게 감소시킨 것으로 사료된다.

Keywords

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