Abstract

The effects of goat's beard (Aruncus dioicus var ramtschaticus Hara) ethanol extracts (AD) on the streptozotocin-induced diabetic symptoms and oxidative stress in rats were assessed. Experimental plots were divided into normal controls (NC), diabetes controls (DM), diet with 0.3% AD after diabetes induction (SA), and diet with 0.6% AD after diabetes induction (SB), then fed for 5 weeks. In the SA and SB groups as compared with the DM group, diabetic symptoms including weight loss, increase in feed and water intake, and enlargement of the liver and kidney were improved. The levels of blood glucose and serum fructosamine were reduced by $17.9{\sim}27.2%$ and $25.6{\sim}32.6%$, respectively. The activities of alanine aminotransferase, aspartate aminotransferase and the levels of triglycerides, total cholesterol, and LDL-cholesterol in the serum were reduced by $25.6{\sim}30.3$, $42.37{\sim}55.51$, $26.85{\sim}30.44$ and $37.29{\sim}39.11%$, respectively, whereas the level of HDL-cholesterol was increased by $37.29{\sim}39.11%$. Hepatic total (T) and O type (O) activities of xanthine oxidoreductase, O/T ratio(%) and level of lipid peroxide were significantly decreased, while the level of glutathione was increased, and also the activities of superoxide dismutase and glutathione S-transferase were increased by $56.84{\sim}94.90%$ and $57.14{\sim}68.92%$, respectively. In the above results, it was noted that AD has an antidiabetic effect which alleviated hyperglycemia and the AD reduced and/or prevented the tissue damage caused by diabetes yia the inhibition of reactive oxygen species (ROS) generating systems concurrent with an increase in ROS scavenging.

삼나물 에탄올 추출물이 streptozotocin으로 유발한 쥐의 당뇨증상과 산화적 스트레스에 미치는 영향을 조사하였다. 실험군은 정상군(NC), 당뇨군(DM), 당뇨유발 후 식이에 삼나물 에탄올 추출물을 0.3%를 첨가한 식이군(SA), 당뇨유발 후 식이에 삼나물 에탄올 추출물을 0.6% 첨가한 식이군(SB)으로 구분하여 5주간 사육하였다. SA군과 SB군은 NC군에는 미치지 못하였으나, 당뇨로 인해 초래되는 병리적 증상인 체중 감소, 식이섭취량 및 음용수 섭취량의 증가, 식이효율저하, 간장 및 신장 무게의 증가 현상을 개선하는 효과가 있었다. 실험식이로 5주간 사육한 당뇨쥐의 혈당은 DM군에 비하여 $17.9{\sim}27.2%$를 감소시켰으며 fructosamine의 함량은 $25.6{\sim}32.6%$를 감소시켰다. 또한, 당뇨로 인하여 증가된 alanine aminotransferase(ALT)와 aspartate aminotransferase(AST) 활성을 각각 25.6 및 30.3% 감소시켰다. SA 및 SB군은 DM군에 비하여 혈청 중성지질은 $42.37{\sim}55.51%$ 감소, total cholesterol 함량은 $26.85{\sim}30.44%$ 감소, HDL-cholesterol 함량은 $13.01{\sim}17.35%$ 증가, LDL-cholesterol 함량은 $37.29{\sim}39.11%$가 감소하였다. SA 및 SB군의 xanthine oxidoreductase의 total type, O type 및 O/T(%)은 DM군에 비하여 유의적으로 감소하였으며 간 조직 glutathione함량은 유의적으로 증가 lipid peroxide 함량은 유의적으로 감소시켰다. Superoxide dismutase와 glutathione S-transferase 활성도 DM군에 비하여 각각 $56.84{\sim}94.90%$ 및 $57.14{\sim}68.92%$를 증가시켰다. 이상의 실험 결과 삼나물 에탄을 추출물은 STZ로 유도한 당뇨쥐의 고혈당을 완화시킴과 동시에 ROS 생성계를 억제하고 ROS 소거계를 활성화시킴으로써 당뇨를 경감시키는 효과가 있는 것으로 사료된다.

Keywords

• Goat beard;
• Aruncus dioicus var ramtschaticus Hara;
• antidiabetes;
• oxidative stress