Abstract
This study is aimed to evaluate the protective effect of Gastrodiae rhizoma and steamed, dried & fermented Gastrodiae rhizoma on Lipopolysaccharide (LPS)-induced hepatic injury in the mice model. Sample was selected to GR0F0 (not processed gastrodia rhizome) and GR6F4 (fermented with Saccharomyces cerevisiae before steamed and dried 6 times) based on 1,1-diphenyl-2-picrylhydrazyl, 2,2'-azinobis-3-ethyl-benzothiazoline-6-sulfonic acid, and High-performance liquid chromatography analysis. Mice were randomly divided into 4 groups - Normal group, vehicle group (LPS treated), GR0F0 group (fed GR0F0 before LPS treated) and GR6F4 group (fed GR6F4 before LPS treated) with 6 mice in each group. GR0F0 group and GR6F4 group were fed each extract 200 mg/kg/day during 8 days. LPS 20 mg/kg injected to the experimental groups as abdominal injection. We measured aspartate aminotransferase, alanine amino-transferase in serum. GR0F0 and GR6F4 showed a significant decrease compared to the vehicle group. As a result of measuring the ROS, GR6F4 group showed a significant reduction in both the serum and liver tissues compared to the vehicle group. GR0F0 group showed a significant reduction only in the liver tissues. Activator protein-1, cyclooxygenase-2, and Inducible nitric oxide synthase were significantly decreased GR0F0 group and GR6F4 group. But tumor necrosis factor alpha only showed a significant reduction in GR6F4 group. GR0F0 and GR6F4 groups against liver damage in mice with LPS. That showed significant effects on anti-oxidant and anti-inflammatory action. The effects of GR6F4 group showed superior results compared to GR0F0 group. Therefore, Steamed, dried & fermented Gastrodia rhizoma was might have a protective effect on liver injury.
본 연구의 목적은 증숙 및 발효과정을 거친 천마추출물이 LPS로 유도된 간 손상에 미치는 효능을 평가하고자 하였다. 증숙 횟수 및 발효균을 달리한 25가지 시료 중 DPPH와 ABTS 라디칼 소거능을 측정하여 생 천마(GR0F0)와 6회 증숙한 후, Saccharomyces cerevisiae균으로 발효한 GR6F4간의 비교실험이 가능할 것으로 사료되었다. 마우스는 6마리씩 4그룹(정상군, 대조군, GR0F0 투여군, GR6F4투여군)으로 나누어 실험을 진행하였다. LPS를 투여하기 전, 각 시료를 200 mg/kg/day로 8일간 경구 투여하였으며, 간 손상을 유발하기 위하여 LPS를 20 mg/kg로 복강투여하였다. 혈액에서 AST, ALT를 측정한 결과, 대조군에서 그 수치가 증가하였고, GR6F4군에서 감소하였을 뿐 아니라, 혈액 및 간에서 측정한 ROS 수치 또한 유의하게 감소하였다. 간조직에서 AP-1, COX-2, TNF-${\alpha}$와 INOS를 측정한 결과, GR0F0 또한 감소하였으나, 증숙 및 발효과정을 거친 GR6F4군에서 더욱 큰 효과를 보이는 것을 확인하였다. 이러한 결과들은 GR6F4의 뛰어난 항산화 및 항염증 효과를 증명하며, 그러므로 증숙 및 발효과정을 거친 천마는 간 손상에 보호효과가 있다고 보여진다.