Tissue-transplant fusion and vascularization of myocardial microtissues and macrotissues implanted into chicken embryos and rats

Kelm, Jens M; Djonov, Valentin; Hoerstrup, Simon P; Guenter, Christina I; Ittner, Lars M; Greve, Frauke; Hierlemann, Andreas; Sanchez-Bustamante, Carlota Diaz; Perriard, Jean-Claude; Ehler, Elisabeth; Fussenegger, Martin (2006). Tissue-transplant fusion and vascularization of myocardial microtissues and macrotissues implanted into chicken embryos and rats. Tissue engineering, 12(9), pp. 2541-53. Larchmont, N.Y.: Mary Ann Liebert 10.1089/ten.2006.12.2541

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Cell-based therapies and tissue engineering initiatives are gathering clinical momentum for next-generation treatment of tissue deficiencies. By using gravity-enforced self-assembly of monodispersed primary cells, we have produced adult and neonatal rat cardiomyocyte-based myocardial microtissues that could optionally be vascularized following coating with human umbilical vein endothelial cells (HUVECs). Within myocardial microtissues, individual cardiomyocytes showed native-like cell shape and structure, and established electrochemical coupling via intercalated disks. This resulted in the coordinated beating of microtissues, which was recorded by means of a multi-electrode complementary metal-oxide-semiconductor microchip. Myocardial microtissues (microm3 scale), coated with HUVECs and cast in a custom-shaped agarose mold, assembled to coherent macrotissues (mm3 scale), characterized by an extensive capillary network with typical vessel ultrastructures. Following implantation into chicken embryos, myocardial microtissues recruited the embryo's capillaries to functionally vascularize the rat-derived tissue implant. Similarly, transplantation of rat myocardial microtissues into the pericardium of adult rats resulted in time-dependent integration of myocardial microtissues and co-alignment of implanted and host cardiomyocytes within 7 days. Myocardial microtissues and custom-shaped macrotissues produced by cellular self-assembly exemplify the potential of artificial tissue implants for regenerative medicine.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Anatomy
UniBE Contributor:	Djonov, Valentin Georgiev
Subjects:	600 Technology > 610 Medicine & health
ISSN:	1076-3279
ISBN:	16995787
Publisher:	Mary Ann Liebert
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:49
Last Modified:	05 Dec 2022 14:15
Publisher DOI:	10.1089/ten.2006.12.2541
PubMed ID:	16995787
Web of Science ID:	000240780900014
URI:	https://boris.unibe.ch/id/eprint/20356 (FactScience: 3644)