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首页> 外文期刊>Clinical and experimental pharmacology & physiology >Gender differences and endothelium- and platelet-derived factors in the coronary circulation.
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Gender differences and endothelium- and platelet-derived factors in the coronary circulation.

机译:性别差异以及冠状动脉循环中的内皮和血小板衍生因子。

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1. Experiments were designed to determine whether or not interactions of platelets with coronary arteries are affected by gender or oestrogen-status. 2. Platelets and right coronary arteries were isolated from sexually mature male, female and ovariectomized pigs. Arteries were suspended in organ chambers for the measurement of isometric force. Responses of rings, with and without endothelium, were evaluated to aggregating platelets and the platelet products 5-hydroxytryptamine (5-HT) and adenosine diphosphate (ADP). 3. Release of 5-HT, thromboxane A2 (TXA2) and prostacyclin were measured from platelets. 4. Platelets caused relaxations of rings with endothelium from all pigs. However, in rings without endothelium, consistent contractions were observed only in rings from male pigs. 5. The release of 5-HT and prostacyclin was greatest from platelets of ovariectomized pigs compared with male and female pigs. Release of TXA2 was greatest from platelets of male pigs. 6. Endothelium-dependent relaxations to ADP and contractions to 5-HT were similar among the three groups. 7. These results suggest that there may be gender-specific differences in vasomotor responses to autogenous platelets but not to the platelet-derived products 5-HT and ADP. Furthermore, there are gender differences in platelets in the release of cyclo-oxygenase metabolites of arachidonic acid and 5-HT. These products could contribute to gender differences in response to injury in the coronary circulation.
机译:1.设计实验以确定血小板与冠状动脉的相互作用是否受到性别或雌激素状态的影响。 2.从性成熟的雄性,雌性和去卵巢猪中分离出血小板和右冠状动脉。将动脉悬挂在器官腔中以测量等距力。评价具有和不具有内皮的环对聚集血小板和血小板产物5-羟基色胺(5-HT)和二磷酸腺苷(ADP)的响应。 3.从血小板中测量5-HT,血栓烷A2(TXA2)和前列环素的释放。 4.血小板导致所有猪的内皮环松弛。然而,在没有内皮的环中,仅在雄性猪的环中观察到一致的收缩。 5.与雄性和雌性猪相比,去卵巢猪的血小板中5-HT和前列环素的释放最大。雄性猪的血小板中TXA2的释放最大。 6.在三组中,内皮依赖性的ADP松弛和5-HT的收缩相似。 7.这些结果表明,对自体血小板的血管舒缩反应可能存在性别特异性差异,但对血小板衍生产物5-HT和ADP则没有。此外,花生四烯酸和5-HT的环氧合酶代谢产物释放中的血小板存在性别差异。这些产品可能会导致性别差异,以响应冠状动脉循环损伤。

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