hiPSC-CM电生理学:时间变化和研究参数对实验可重现性的影响
Devon Guerrelli1,2,3, Jenna Pressman1,2, Shatha Salameh1,3
1Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Hospital, Washington, District of Columbia, United States.
概括
人类诱导的多能干细胞衍生心肌细胞 (hiPSC-CMs) 电生理学对实验条件敏感. 标准化协议和报告参数,如培养时间和平衡,对于可重复性心脏毒性测试至关重要.
科学领域:
- 心血管研究研究心血管研究
- 干细胞生物学 干细胞生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 人类诱导的多能干细胞衍生心肌细胞 (hiPSC-CMs) 对于临床前心脏毒性评估和药物效应预测至关重要.
- 关于hiPSC-CMs的可复制性问题已经出现,需要对实验变异性的调查.
研究的目的:
- 研究时间变化和实验参数对hiPSC-CM电生理学的影响.
- 为了确定hiPSC-CM微电极阵列 (MEA) 研究中的变异性来源.
主要方法:
- 使用MEA系统在2-14天内培养了hiPSC-CMs (iCell心肌细胞2,Cor.4U),并通过MEA系统获得了生物信号.
- 分析了电生理学参数,包括击中率,场潜在持续时间 (FPD) 和尖峰幅度.
- 使用E-4031,尼菲迪平和异二醇来评估药物反应.
主要成果:
- 一个20分钟的平衡期改变了殴打率 (+22.6%) 和FPD (-7.7%).
- 与内排相比,外排的井排表现出更快的跳动率 (8.8次/分钟) .
- 培养时间 (2-14天) 显著影响了拍拍率 (-12.7拍/分钟),FPD (+257毫秒) 和尖峰幅度 (+3.3mV),影响了药物反应.
结论:
- 时间变化和实验参数 (平衡时间,井位置,培养时间) 在hiPSC-CM MEA研究中引入了变化.
- 在培养中持续的hiPSC-CM成熟可能解释心脏指标的每日变化.
- 标准化的协议和实验条件的透明报告对于改善hiPSC-CM研究中的可复制性和数据解释至关重要.
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