RESUMEN
The antihypertensive effect of marine sulfated polysaccharide AHD and its underlying mechanisms were studied in renovascular hypertensive rats (RHR) [two-kidney one clip,Goldblatt(2-K 1C)J. AHD were given orally at doses of 12.5, 25,50mg?kg～-1 once a day for five weeks,simultaneously wity the initiation of the establishment of renovascular hypertensive model. Serum nitric oxide(NO) was determined with NO kit,and plasma Angiotensin E (Ang Ⅱ ) and Eneothelin (ET) Were measured by radioimmumoassays. The results indicated that AHD decreased arteial blood pressure in a dose-dependent manner. Moreover, nitric oxide (NO) contents in serum were dose-dependently elevated,accompanied by dramatic reduction in Ang Ⅱ and ET contents. These findings suggested that AHD exerted its hypotensive activity by enhancing tye release of NO,followed by reduction in production of boty ANG Ⅱ and ET in vivo.