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首页> 外文期刊>Clinical and experimental pharmacology & physiology >Chronic levothyroxin treatment is associated with ion channel abnormalities in cardiac and neuronal cells.
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Chronic levothyroxin treatment is associated with ion channel abnormalities in cardiac and neuronal cells.

机译:慢性左甲状腺素治疗与心脏和神经元细胞的离子通道异常有关。

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摘要

1. We investigated the ion currents responsible for repolarization of guinea-pig isolated myocytes (ICa) and rat hippocampal CA1 neurons (IA and IK) by means of the whole-cell holding technique. 2. The rat hypertrophied heart, induced by levothyroxin, caused exaggerated cardiac arrhythmias after coronary ischaemia-reperfusion. 3. We found an enhanced ICa in guinea-pig isolated myocytes and decreased IA and IK in rat hippocampal CA1 neurons following levothyroxin treatment. Blockade of the outward K+ current and an increment in inward Ca2+ current by chronic levothyroxin treatment contributed to the delayed repolarization and aggravated cardiac arrhythmias. 4. Animals treated with chronic levothyroxin may serve as pathological models for the investigation of the pattern of ion channel disorders with regard to impaired repolarization and aggravated cardiac arrhythmias.
机译:1.我们通过全细胞保持技术研究了负责豚鼠离体心肌细胞(ICa)和大鼠海马CA1神经元(IA和IK)复极化的离子电流。 2.左旋甲状腺素引起的大鼠肥大心脏在冠状动脉缺血再灌注后引起夸张的心律不齐。 3.我们发现,左甲状腺素治疗后,豚鼠离体的心肌细胞ICa增强,大鼠海马CA1神经元的IA和IK降低。慢性左旋甲状腺素治疗可阻断向外的K +电流和向内的Ca2 +电流增加,导致复极化延迟和心律失常加重。 4.接受慢性左甲状腺素治疗的动物可作为病理模型,用于研究与复极化受损和心律不齐加重有关的离子通道疾病模式。

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