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首页> 外文期刊>BJOG: an international journal of obstetrics and gynaecology >Dexamethasone and ursodeoxycholic acid protect against the arrhythmogenic effect of taurocholate in an in vitro study of rat cardiomyocytes.
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Dexamethasone and ursodeoxycholic acid protect against the arrhythmogenic effect of taurocholate in an in vitro study of rat cardiomyocytes.

机译:在大鼠心肌细胞的体外研究中,地塞米松和熊去氧胆酸可以预防牛磺胆酸盐的致心律失常作用。

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To establish whether the therapeutic agents ursodeoxycholic acid and dexamethasone protect cardiomyocytes from taurocholate-induced arrhythmias in an in vitro model.Laboratory study.Imperial College London, Hammersmith Campus.Neonatal rat cardiomyocytes.Using scanning ion conductance microscopy, we measured the rate, rhythm, amplitude of contraction and calcium dynamics of ventricular myocytes from one to two day old rats. Cells were pre-incubated for 16 hours in dexamethasone (80 or 800 nM) or 0.1 mM ursodeoxycholic acid before adding taurocholate at different concentrations (0.3-4.5 mM).Changes in rate and amplitude of contraction, calcium dynamics and rhythm.Taurocholate at concentrations of up to 3 mM induces abnormal changes including reductions in rate, amplitude of contraction, abnormal calcium dynamics and dysrhythmias. Although dexamethasone had no immediate protective effect on these changes, pre-incubation with dexamethasone was protective. Ursodeoxycholic acid pre-incubation was protective at taurocholate concentrations up to 1 mM.The therapeutic agents dexamethasone and ursodeoxycholic acid appear protective against the arrhythmogenic effect of taurocholate on cardiomyocytes.
机译:在体外模型中确定熊去氧胆酸和地塞米松是否能保护心肌细胞免受牛磺胆酸引起的心律失常的实验室研究。伦敦帝国大学哈默史密斯分校新生鼠心肌细胞。使用扫描离子电导显微镜观察速率,心律, 1-2天大的大鼠心室肌细胞收缩幅度和钙动力学。将细胞在地塞米松(80或800 nM)或0.1 mM熊去氧胆酸中预孵育16小时,然后加入不同浓度(0.3-4.5 mM)的牛磺胆酸盐,收缩率和幅度,钙动力学和节律的变化。高达3 mM的诱导异常变化,包括速率降低,收缩幅度降低,异常钙动力学和心律不齐。尽管地塞米松对这些变化没有立即的保护作用,但与地塞米松的预孵育具有保护作用。熊去氧胆酸预孵育在牛磺胆酸浓度高达1 mM时具有保护作用。地塞米松和熊去氧胆酸治疗剂对牛磺胆酸对心肌细胞的心律失常作用具有保护作用。

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