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庞雷 《中国病理生理杂志》1991,(2)
从50至70克麻醉大鼠切取颈动脉体,保存在氧饱和低温无钙F—12营养液中撕碎的颈动脉体种植于以Polylysine处理过的盖玻片上,加入培养液。置于CO_2孵箱中培养2至7天内进行实验。浴槽中进行实验, 相似文献
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川芎嗪对麻醉犬心血管作用的初步观察 总被引:1,自引:0,他引:1
Tetramethylpyrazine (TMPZ) has been shown to be one of the active principles of the Chinese medicinal plant "Chuan Qong", Ligusticum Wallichii Franch.TMPZ (4, 8 or 16 mg/kg) given intravenously to anesthetized dogs transiently decreased the blood pressure and markedly increased the heart rate and maximal rate of the left ventricular pressure. These cardiovascular effects of TMPZ seemed to be dosedependent. Prior administration of propranolol (2 mg/kg, I. V.) abolished the effect of TMPZ on the heart, leaving the depressor effect of TMPZ unchanged. Reserpinization of the dog affected the cardiovascular actions of TMPZ in a way similar to propranolol. The cardiovascular responses to TMPZ still persisted after cervical vagotomy. The injection of TMPZ at a dose of 0.4~2 mg/kg into the vertebral artery induced no significant hemodynamic response.These results indicate that in the anesthetized dog TMPZ exhibited positive inotropic and chronotropic effects on the heart mediated by sympatho-adrenergic mechanism. In addition, TMPZ seemed to have some direct dilating action on the peripheral bloodvessels. 相似文献
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黄嘌呤-黄嘌呤氧化酶系统(X-XOD)可诱发培养心肌细胞的自由基损伤。鉴于钼是黄嘌呤氧化酶(XOD)的重要组分,而且钼对于心肌细胞有保护作用还是有损伤作用的报道不尽一致,本实验拟以心肌细胞动作电位与自发性搏动为指标,探讨钼对心肌细胞机能影响的规律。 实验方法取新生昆明种小鼠与Wistar大鼠的乳鼠;胎龄4~6个月,水囊引产的人胚心尖,分别经0.1%胰蛋白酶分离心肌细胞,然后将其置入聚苯乙烯培养瓶,在36.5℃、5%CO_2和95%空气的孵箱内培养。常规培养基由80%199及20%小牛血清组成。小鼠心肌细 相似文献