dracocephalum kotschyi boiss. is a traditional medicine with antispasmodic activities. the objective of this research was to study antispasmodic activities of hydroalcoholic extract of d. kotschyi on rat isolated uterus contractions for comparison with isolated ileum. hydroalcoholic extract was obtained from aerial part of d. kotschyi using percolation method. a portion of rat ileum or uterus w...

Several reports have shown the various effects of grape (Vitis vinifera) seed extract such as antioxidant, hypotensive, hypolipidemic and vasodilatory effects. The aim of present study was to investigate the effect of grape leaf hydroalcoholic extract on isolated rat tracheal contractions induced by KCl and acetylcholine. The trachea was removed from male adult Sprague-Dawley rat and placed in ...

The relaxatory effect of Vitis vinifera leaf extract on rat uterus has been reported and it was postulated that, the extract relaxed through the blockade of voltage dependent calcium channels. The extract also, relaxed rat aorta through NO and was dependent on the functional endothelium. In the present study, the effect of Vitis vinifera hydroalcoholic leaf extract (VHLE) on rat vas deferens pr...

Hypertension increases with aging, and changes in vascular estrogen receptors (ERs) may play a role in age-related hypertension in women. We tested whether age-related increases in blood pressure in female spontaneously hypertensive rats (SHRs) are associated with reduction in amount and/or vascular relaxation effects of estrogen and ER. Arterial pressure and plasma estradiol were measured in a...

Seeds of Moringa peregrina (Forssk.) Fiori. (Moringaceae) is widely used in south east of Iran for gastrointestinal disorders. However, so far there is no pharmacological evidence for antispasmodic activity of this plant extract. Therefore, the aim of this research was to investigate antispasmodic activity of M. peregrina on rat isolated ileum contraction. Hydroalcoholic extract was obtained by...

OBJECTIVE The aim of this study was to elucidate the mechanism(s) responsible for the vasorelaxant effect of Nigella sativa (N. sativa). METHODS The activity of different concentrations of N. sativa extract was evaluated on contractile responses of isolated aorta to KCl and phenylephrine (PE). RESULTS The extract (2-14 mg/mL) induced a concentration dependent relaxation both in endothelium-...

Hydrogen peroxide causes vascular contraction and relaxation and contributes to the pathogenesis of hypertension. We hypothesized that the contractile state of blood vessels governs whether H2O2 causes contraction or relaxation. Hydrogen peroxide (1 micromol/L to 1 mmol/L) concentration-dependently contracted thoracic aorta and vena cava from sham normotensive and deoxycorticosterone acetate (D...

The mechanism through which the stresses developed in the diaphragmatic tissue during skeletal muscle contraction sustain local lymphatic function was studied in 10 deeply anesthetized, tracheotomized adult Wistar rats whose diaphragm was exposed after thoracotomy. To evaluate the direct effect of skeletal muscle contraction on the hydraulic intraluminal lymphatic pressures (Plymph) and lymphat...

Insulin attenuates vascular contraction via inhibition of voltage-operated Ca2+ channels and by enhancement of endothelium-dependent vasodilation. Thus it has been suggested that hypertension-associated insulin resistance results from an insensitivity to the hormone's effects on vascular reactivity. This hypothesis has been strengthened by reports that thiazolidinediones, a class of insulin-sen...