3D‐Printed Myocardium‐Specific Structure Enhances Maturation and Therapeutic Efficacy of Engineered Heart Tissue in Myocardial Infarction

3D‐Printed Myocardium‐Specific Structure Enhances Maturation and Therapeutic Efficacy of Engineered Heart Tissue in Myocardial Infarction

Abstract Despite advancements in engineered heart tissue (EHT), challenges persist in achieving accurate dimensional accuracy of scaffolds and maturing human induced pluripotent stem cell‐derived cardiomyocytes (hiPSC‐CMs), a primary source of functional cardiac cells. Drawing inspiration from cardi...

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Main Authors: Yong Wu, Yaning Wang, Miao Xiao, Guangming Zhang, Feixiang Zhang, Mingliang Tang, Wei Lei, Ziyun Jiang, Xiaoyun Li, Huiqi Zhang, Xiaoyi Ren, Yue Xu, Xiaotong Zhao, Chenxu Guo, Hongbo Lan, Zhenya Shen, Jianyi Zhang, Shijun Hu
Format: Article
Language:English
Published: Wiley 2025-03-01
Series:Advanced Science
Subjects:
3D printing
engineered heart tissue
myocardial infarction
myocardium‐specific structure
Online Access:https://doi.org/10.1002/advs.202409871
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Summary:Abstract Despite advancements in engineered heart tissue (EHT), challenges persist in achieving accurate dimensional accuracy of scaffolds and maturing human induced pluripotent stem cell‐derived cardiomyocytes (hiPSC‐CMs), a primary source of functional cardiac cells. Drawing inspiration from cardiac muscle fiber arrangement, a three‐dimensional (3D)‐printed multi‐layered microporous polycaprolactone (PCL) scaffold is created with interlayer angles set at 45° to replicate the precise structure of native cardiac tissue. Compared with the control group and 90° PCL scaffolds, the 45° PCL scaffolds exhibited superior biocompatibility for cell culture and improved hiPSC‐CM maturation in calcium handling. RNA sequencing demonstrated that the 45° PCL scaffold promotes the mature phenotype in hiPSC‐CMs by upregulating ion channel genes. Using the 45° PCL scaffold, a multi‐cellular EHT is successfully constructed, incorporating human cardiomyocytes, endothelial cells, and mesenchymal stem cells. These complex EHTs significantly enhanced hiPSC‐CM engraftment in vivo, attenuated ventricular remodeling, and improved cardiac function in mouse myocardial infarction. In summary, the myocardium‐specific structured EHT developed in this study represents a promising advancement in cardiovascular regenerative medicine.
ISSN:2198-3844

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