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首页> 外文期刊>Journal of pharmacological sciences. >Type of electrical stimulation influences diaphragm response to adrenoceptor and calcium channel modulators: the role of extracellular and intracellular calcium events.
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Type of electrical stimulation influences diaphragm response to adrenoceptor and calcium channel modulators: the role of extracellular and intracellular calcium events.

机译:电刺激的类型影响隔膜对肾上腺素受体和钙通道调节剂的反应:细胞外和细胞内钙事件的作用。

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摘要

The influence of direct single pulse and subtetanic electrical stimulation (ES) on isolated rat hemidiaphragm response to adrenoceptor antagonists and calcium channel blockers was investigated. Muscle contractility was stimulated by cumulative micromolar noradrenaline. Noradrenaline effects on developed tension (Td) in the presence of various alpha- and beta-adrenoceptor antagonists (e.g., prazosin and ICI 118551) were qualitatively different during different types of ES. Also, intact L-voltage calcium channels were necessary for noradrenaline-induced potentiation of Td during both types of ES, while the balance between ryanodine receptors- and inositol triphosphate (IP3)-related calcium events in the muscle was influenced by the pattern of the ES.
机译:研究了直接单脉冲和亚强直电刺激(ES)对离体大鼠隔膜对肾上腺素能受体拮抗剂和钙通道阻滞剂反应的影响。累积的微摩尔去甲肾上腺素刺激肌肉收缩。在不同类型的ES中,存在各种α-和β-肾上腺素受体拮抗剂(例如prazosin和ICI 118551)时,去甲肾上腺素对已发展的张力(Td)的影响在质量上有所不同。同样,在两种类型的ES中,完整的L电压钙通道对于去甲肾上腺素诱导的Td增效都是必需的,而肌肉中由ryanodine受体和肌醇三磷酸(IP3)相关的钙事件之间的平衡则受肌肉活动模式的影响。 ES。

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