Methods Isometric tension measurements were used to study the effect ofFructus Aurantii on isolated rat thoracic aorta rings.

Methods:After preparation of the rat thoracic aorta rings,the tension of the rings was measured by biological signal analytical system.

Results: Salidroside had no significant relaxation effect on normal thoracic aorta rings,but relaxed thoracic aorta rings pretreated by norepinephrine(NE,1 μmol·L-1) or KCl(60 mmol·L-1),and the relaxation in endothelium-denuded rings was reduced.

Method:The tension of rat thoracic aorta rings was used to evaluated the vasorelaxant activities of four homoisoflavonoids,brazlin(1),(E)-3-(3,4-dihydroxybenzylidene)-7-hydroxychroman-4-one(2),sappanone B(3),3-deoxysappanone B(4).

Object: In the present study, the effects of reducing Na+ gradient (reducing external Na+ or increasing internal Na+) on evoked tension in thoracic aortic rings of two-kidney, one-clip model of hypertension were observed.

OBJECTIVE Study effect of tetra-acetylated puerarin on isolated rats thoracic aortic rings and it’s mechanisms.

In order to determine whether IL 2 modifies vascular tone, we investigated the effect of IL 2 on rat thoracic aorta rings and the underlying mechanisms.

Vasodilative effect and mechanism of enalapril on thoracic aorta of rats;

Effects of urotensin Ⅱ on thoracic aorta of spontaneously hypertensive rats and on ERK_(1/2) phosphorylation in cultured vascular smooth muscle cells;

Efects of n-butyl alcohol extract from Polygonum bistorla on the contraction of rabbit thoracic aorta in vitro;