首页> 外文会议>2013 Pan American Health Care Exchanges Conference >Chloroquine effect on human atrial action potential under normal conditions and during paroxysmal and chronic atrial fibrillation. A simulation study
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Chloroquine effect on human atrial action potential under normal conditions and during paroxysmal and chronic atrial fibrillation. A simulation study

机译:在正常情况下以及阵发性和慢性心房颤动期间,氯喹对人心房动作电位的影响。模拟研究

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Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia. If the paroxysmal AF (pAF) is not treated it could become chronic or permanent AF (cAF). Blockade of inward rectifying potassium (IK1) and acetylcholine-activated potassium (IKACh) currents by the antimalarial drug chloroquine could play a role as antiarrhythmic drug in human AF. We simulated the effects of chloroquine on human atrial cell and studied its effect on atrial action potential under normal conditions and during pAF and cAF. For this, we modified a human cell model to obtain pAF and cAF models, and we developed a model of chloroquine effects on IK1 and IKACh; this model fit well the experimental data. Our results show that chloroquine blocks both currents in a fraction greater as the concentration increases, prolonging its action in time, which results in an APD lengthening. Chloroquine has a greater effect on pAF conditions and high chloroquine concentration is needed to achieve similar effects in cAF. To our knowledge, this is the first work that has developed mathematical models of chloroquine effects on IK1 and IKACh currents to study its effect on human atrial action potential.
机译:心房纤颤(AF)是最常见的持续性心律不齐。如果不治疗阵发性房颤(pAF),可能会成为慢性或永久性房颤(cAF)。抗疟药氯喹对内向整流钾(I K1 )和乙酰胆碱激活钾(I KACh )电流的阻断可能在人房颤中起抗心律失常药的作用。我们模拟了氯喹对人心房细胞的作用,并研究了其对正常条件下以及在pAF和cAF期间对心房动作电位的影响。为此,我们修改了人类细胞模型以获得pAF和cAF模型,并开发了氯喹对I K1 和I KACh 的模型。该模型非常适合实验数据。我们的结果表明,氯喹在浓度增加时会阻断两种电流,其作用时间延长,从而导致APD延长。氯喹对pAF条件有更大的影响,需要高浓度的氯喹才能在cAF中达到类似的效果。据我们所知,这是研究氯喹对I K1 和I KACh 电流影响的数学模型的第一项研究,以研究其对人心房动作电位的影响。

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