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Adv Sci (Weinh). 2019 Apr 15;6(11):1900344. doi: 10.1002/advs.201900344. eCollection 2019 Jun 5.

3D Printing of Personalized Thick and Perfusable Cardiac Patches and Hearts.

Author information

1
The School for Molecular Cell Biology and Biotechnology Faculty of Life Sciences Tel Aviv University Tel Aviv 6997801 Israel.
2
Department of Materials Science and Engineering Faculty of Engineering Tel Aviv University Tel Aviv 6997801 Israel.
3
The Center for Nanoscience and Nanotechnology Tel Aviv University Tel Aviv 6997801 Israel.
4
Sagol Center for Regenerative Biotechnology Tel Aviv University Tel Aviv 6997801 Israel.

Abstract

Generation of thick vascularized tissues that fully match the patient still remains an unmet challenge in cardiac tissue engineering. Here, a simple approach to 3D-print thick, vascularized, and perfusable cardiac patches that completely match the immunological, cellular, biochemical, and anatomical properties of the patient is reported. To this end, a biopsy of an omental tissue is taken from patients. While the cells are reprogrammed to become pluripotent stem cells, and differentiated to cardiomyocytes and endothelial cells, the extracellular matrix is processed into a personalized hydrogel. Following, the two cell types are separately combined with hydrogels to form bioinks for the parenchymal cardiac tissue and blood vessels. The ability to print functional vascularized patches according to the patient's anatomy is demonstrated. Blood vessel architecture is further improved by mathematical modeling of oxygen transfer. The structure and function of the patches are studied in vitro, and cardiac cell morphology is assessed after transplantation, revealing elongated cardiomyocytes with massive actinin striation. Finally, as a proof of concept, cellularized human hearts with a natural architecture are printed. These results demonstrate the potential of the approach for engineering personalized tissues and organs, or for drug screening in an appropriate anatomical structure and patient-specific biochemical microenvironment.

KEYWORDS:

3D printing; hearts; hydrogels; induced pluripotent stem cells (iPSCs); tissue and organ engineering

Conflict of interest statement

The authors declare no conflict of interest.

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