JACC:KCNQ1抗体在体内可作为IKs通道的激动剂

2020-05-02 MedSci原创 MedSci原创

长QT综合征(LQTS)患者有发生致命性心律失常的风险,该疾病的一个重要特征就是心脏复极的延迟。药物治疗、植入式心律转复除颤器和左心交感神经切断是目前治疗方案的一部分,但迄今为止还没有针对LQTS的靶

长QT综合征(LQTS)患者有发生致命性心律失常的风险,该疾病的一个重要特征就是心脏复极的延迟。药物治疗、植入式心律转复除颤器和左心交感神经切断是目前治疗方案的一部分,但迄今为止还没有针对LQTS的靶向治疗。本研究的目的旨在评估KCNQ1抗体与观察到的电生理效应之间的因果关系。

本研究纯化了KCNQ1抗体,对过度表达IKs通道的中国仓鼠卵巢细胞进行了全细胞膜片钳实验和单通道记录。然后研究纯化的KCNQ1抗体对诱导多能干细胞培养的人心肌细胞的影响。结果表明KCNQ1抗体可以引起IKs电流的增加。抗体改变了IKs激活的电压依赖性并减缓IKs的失活。在单通道水平,KCNQ1抗体增加了通道的开放时间和概率。在使用人类诱导的多能干细胞源性心肌细胞的LQTS2型(LQTS2)模型中,KCNQ1抗体逆转长时间的心脏复极,并消除心律失常活动。

本研究首次证实KCNQ1抗体在体内可以作为IKs通道的激动剂。

原始出处:

Ange M et al.KCNQ1 Antibodies for Immunotherapy of Long QT Syndrome Type 2.JACC.2020 Apr.

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    2020-12-04 cqlidoudou
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    2020-09-04 hbwxf
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