Homma Jun
   Department   Research Institutes and Facilities, Research Institutes and Facilities
   Position   Assistant Professor
Article types Original article
Language English
Peer review Peer reviewed
Title A novel method to align cells in a cardiac tissue-like construct fabricated by cell sheet-based tissue engineering.
Journal Formal name:Journal of tissue engineering and regenerative medicine
Abbreviation:J Tissue Eng Regen Med
ISSN code:19327005/19326254
Domestic / ForeginForegin
Publisher Wiley
Volume, Issue, Page 14(7),944-954頁
Author and coauthor HOMMA Jun†, SHIMIZU Shogo, SEKINE Hidekazu*, MATSUURA Katsuhisa, SHIMIZU Tatsuya
Publication date 2020/06/01
Summary Fabrication of cardiac tissue from human induced pluripotent stem cell-derived cardiomyocytes (hiPS-CMs) has received great interest, but a major challenge facing researchers is the alignment of cardiomyocytes in the same direction to optimize force generation. We have developed a novel method of fabricating a cardiac tissue-like construct with aligned cells based on the unidirectional stretching of a hiPS-CM sheet. A square cell sheet was harvested from a temperature-responsive culture dish and placed on a silicone surface, and an extending force was imposed on the silicone to stretch the cell sheet along one direction. To enable evaluation of cardiomyocyte morphology in vitro, a cell sheet was constructed by co-culture of hiPS-CMs and human adipose-derived stem cells. In separate experiments, a stretched double-layered cell sheet constructed from hiPS-CMs alone was transplanted onto the muscle of an athymic rat, and its features were compared with those of a non-stretched (control) cell sheet. Immediately after stretching, the stretched cell sheet was significantly longer than the control cell sheet. Immunohistological analysis revealed that the cardiomyocytes showed unidirectional alignment in the stretched cell sheet but random directionality in the control cell sheet. Two weeks after transplantation, immunohistology demonstrated that the stretched cell sheet had retained the unidirectionality of its myocardial fibers and had an orientation intensity that was higher than that of the control cell sheet after transplantation or the stretched cell sheet before transplantation. Our technique provides a simple method of aligning a hiPS-CM-derived cardiac tissue-like construct without the use of a scaffold.
DOI 10.1002/term.3074
PMID 32478904