The three-dimensionality of the hiPSC-CM spheroid contributes to the variability of the field potential

Frontiers in Physiology

Physiology

Minki Hwang¹  Chul-Hyun Lim¹  Eun Bo Shim²  Hyang-Ae Lee³  Su-Jin Lee³ 

[1] AI Medic, Inc., Seoul, Republic of Korea;AI Medic, Inc., Seoul, Republic of Korea;Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon, Republic of Korea;Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon, Republic of Korea;

关键词: hiPSC-CM;    multi-electrode array;    field potential;    drug toxicity;    simulation;   

DOI  :  10.3389/fphys.2023.1123190

 received in 2022-12-13, accepted in 2023-03-10,  发布年份 2023

来源: Frontiers

【 摘 要 】

Background: Field potential (FP) signals from human induced pluripotent stem cell-derived cardiomyocyte (hiPSC-CM) spheroid which are used for drug safety tests in the preclinical stage are different from action potential (AP) signals and require working knowledge of the multi-electrode array (MEA) system. In this study, we developed in silico three-dimensional (3-D) models of hiPSC-CM spheroids for the simulation of field potential measurement. We compared our model simulation results against in vitro experimental data under the effect of drugs E-4031 and nifedipine.Methods: In silico 3-D models of hiPSC-CM spheroids were constructed in spherical and discoidal shapes. Tetrahedral meshes were generated inside the models, and the propagation of the action potential in the model was obtained by numerically solving the monodomain reaction-diffusion equation. An electrical model of electrode was constructed and FPs were calculated using the extracellular potentials from the AP propagations. The effects of drugs were simulated by matching the simulation results with in vitro experimental data.Results: The simulated FPs from the 3-D models of hiPSC-CM spheroids exhibited highly variable shapes depending on the stimulation and measurement locations. The values of the IC50 of E-4031 and nifedipine calculated by matching the simulated FP durations with in vitro experimental data were in line with the experimentally measured ones reported in the literature.Conclusion: The 3-D in silico models of hiPSC-CM spheroids generated highly variable FPs similar to those observed in in vitro experiments. The in silico model has the potential to complement the interpretation of the FP signals obtained from in vitro experiments.

【 授权许可】

Unknown   
Copyright © 2023 Hwang, Lee, Lim, Shim and Lee.