TY  - JOUR
TI  - Biophysical regulation during cardiac development and application to tissue engineering
AU  - Gerecht-Nir, Sharon
AU  - Radisic, Milica
AU  - Park, Hyoungshin
AU  - Cannizzaro, Christopher
AU  - Boublik, Jan
AU  - Langer, Robert
AU  - Vunjak-Novakovic, Gordana
T2  - The International Journal of Developmental Biology
AB  - Tissue engineering combines the principles of biology, engineering and medicine to create biological substitutes of native tissues, with an overall objective to restore normal tissue function. It is thought that the factors regulating tissue development in vivo (genetic, molecular and physical) can also direct cell fate and tissue assembly in vitro. In light of this paradigm, tissue engineering can be viewed as an effort of "imitating nature". We first discuss biophysical regulation during cardiac development and the factors of interest for application in tissue engineering of the myocardium. Then we focus on the biomimetic approach to cardiac tissue engineering which involves the use of culture systems designed to recapitulate some aspects of the actual in vivo environment. To mimic cell signaling in native myocardium, subpopulations of neonatal rat heart cells were cultured at a physiologically high cell density in three-dimensional polymer scaffolds. To mimic the capillary network, highly porous elastomer scaffolds with arrays of parallel channels were perfused with culture medium. To mimic oxygen supply by hemoglobin, culture medium was supplemented with an oxygen carrier. To enhance electromechanical coupling, tissue constructs were induced to contract by applying electrical signals mimicking those in native heart. Over only eight days of cultivation, the biomimetic approach resulted in tissue constructs which contained electromechanically coupled cells expressing cardiac differentiation markers and cardiac-like ultrastructure and contracting synchronously in response to electrical stimulation. Ongoing studies are aimed at extending this approach to tissue engineering of functional cardiac grafts based on human cells.
PY  - 2006
DO  - 10.1387/ijdb.052041sg
VL  - 50
IS  - 2-3
SP  - 233
EP  - 243
J2  - Int. J. Dev. Biol.
LA  - en
SN  - 0214-6282
SN  - 1696-3547
UR  - https://ijdb.ehu.eus/article/052041sg
Y2  - 2024/11/21/19:09:03
ER  -