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3D printed micro-scale force gauge arrays to improve human cardiac tissue maturation and enable high throughput drug testing

机译:3D印刷的微尺度力量阵列,以改善人体心脏组织成熟,实现高通量药物测试

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Human induced pluripotent stem cell - derived cardiomyocytes (iPSC-CMs) are regarded as a promising cell source for establishing in vitro personalized cardiac tissue models and developing therapeutics. However, analyzing cardiac force and drug response using mature human iPSC-CMs in a high-throughput format still remains a great challenge. Here we describe a rapid light-based 3D printing system for fabricating micro-scale force gauge arrays suitable for 24-well and 96-well plates that enable scalable tissue formation and measurement of cardiac force generation in human iPSC-CMs. We demonstrate consistent tissue band formation around the force gauge pillars with aligned sarcomeres. Among the different maturation treatment protocols we explored, 3D aligned cultures on force gauge arrays with in-culture pacing produced the highest expression of mature cardiac marker genes. We further demonstrated the utility of these micro-tissues to develop significantly increased contractile forces in response to treatment with isoproterenol, levosimendan, and omecamtiv mecarbil. Overall, this new 3D printing system allows for high flexibility in force gauge design and can be optimized to achieve miniaturization and promote cardiac tissue maturation with great potential for high-throughput in vitro drug screening applications.
机译:人诱导多能干细胞衍生的心肌细胞(IPSC-CMS)被认为是用于建立体外个性化心脏组织模型和发展治疗剂的有前途的细胞源。然而,使用成熟的人体IPSC-CM以高通量格式分析心力和药物反应仍然是一个巨大的挑战。在这里,我们描述了一种用于制造适用于24孔和96孔板的微垢力量表阵列的快速基于光的3D打印系统,其能够在人体IPSC-CMS中实现可扩展的组织形成和测量心力发电。我们展示了具有对齐的SARCOMERES的力量表柱周围的一致的组织带。在我们探索的不同成熟治疗方案中,3D对齐培养物对培养起搏的力量表阵列产生了成熟心脏标志物基因的最高表达。我们进一步证明了这些微组织的效用,以响应于异丙肾,左索亚芬醇和omecamtiv麦克巴尔治疗而显着增加的收缩力。总的来说,这种新的3D打印系统允许高柔韧性测量设计,可以优化以实现小型化,促进心脏组织成熟,具有高通量的体外药物筛选应用。

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