Anti-hypertensive effect of Gastrodia elata Bl leaf extract in rats

作者：Fang, Hua; Zhang, Wei-jing; Zhang, Jing-chao; Yang, Miao; Zhang, Fang-xiang; Zhang, Jian-ping^*

来源：Tropical Journal of Pharmaceutical Research, 2017, 16(8): 1887-1891.

DOI：10.4314/tjpr.v16i8.19

• Antihypertensive
• Gastrodia elata
• Goldblatt renovascular hypertension
• Endothelin-1
• Hypertrophy

Purpose: To investigate the probable antihypertensive effects of Gastrodia elata Bl. extract (GEBE) in renovascular hypertensive rats as well as the mechanism involved in blood pressure reduction.
Methods: The two-kidney one-clip (2K1C) Goldblatt model of renovascular hypertension was used in Wistar rats. The 2K1C group rats were treated with captopril (40 mg/kg/day), low-dose GEBE (150 mg/kg/day) and high-dose of GEBE (300 mg/kg/day) for 6 weeks by intragastric administration. Systolic (SBP) and diastolic blood pressure (DBP) were measured by the tail-cuff method. Urine creatinine and urea levels of the rats were measured by enzyme-linked immunosorbent assay (ELISA). Superoxide dismutase (SOD) and malondialdehyde (MDA) levels were also evaluated.
Results: In the captopril-and GEBE-treated groups, blood pressure decreased progressively over the course of the 6-week treatment period compared with that of the untreated (control) rats (p < 0.01). High-dose GEBE also significantly increased plasma SOD activity but decreased plasma MDA concentration (p < 0.05). Renal function improved following captopril and GEBE (300 mg/kg/day) treatment (p < 0.01).
Conclusion: The results suggest that GEBE probably exerts an antihypertensive effect by inhibiting endothelin (ET)-converting enzyme and via its antioxidant activity.

• 出版日期2017-8
• 单位贵州省人民医院