Zusammenfassung
Embryonale Stammzellen (ES-Zellen) sind Vorläufer aller somatischen Körperzellen und daher als Zellquelle für die Herstellung künstlicher Organsysteme (Tissue Engineering) besonders attraktiv. Dass Zellen grundsätzlich organähnliche Gewebe in der Kulturschale formen können, ist lange bekannt. Die Herstellung künstlicher Herzgewebe gelang zunächst aus Herzmuskelzellen fetaler Hühnchen, neonataler Ratten und Mäuse. Aktuelle Untersuchungen befassen sich vor allem mit der Generierung von Herzgewebe aus Stammzellen. Dabei werden folgende langfristige Ziele verfolgt: (1) Bereitstellung menschlicher Herzgewebe für entwicklungsbiologische Untersuchungen; (2) Herstellung humaner Testsysteme für die pharmakologische und toxikologische Substanz-Entwicklung bzw. -Testung und (3) Entwicklung von Ersatzherzgewebe für eine potenzielle therapeutische Anwendung in vivo. Der vorliegende Übersichtsartikel bespricht zunächst den Hintergrund der Zellbasierten kardialen Regeneration/Reparatur, führt darauf in die unterschiedlichen Konzepte des myokardialen Tissue Engineerings ein, diskutiert die Anwendung embryonaler, aber auch nicht-embryonaler Stammzellen und spekuliert schließlich über das direkte und indirekte therapeutische Potenzial künstlicher Herzgewebe aus menschlichen Stammzellen.
Abstract
Embryonic stem cells can give rise to all somatic cells, making them an attractive cell source for tissue engineering applications. The propensity of cells to form tissue-like structures in a culture dish has been well documented. We and others made use of this intrinsic property to generate bioartificial heart muscle. First proof-of-concept studies involved immature heart cells mainly from fetal chicken, neonatal rats and mice. They eventually provided evidence that force-generating heart muscle can be engineered in vitro. Recently, the focus shifted to the application of stem cells to eventually enable the generation of human heart muscle and reach following long-term goals: (1) development of a simplified in vitro model of heart muscle development; (2) generation of a human test-bed for drug screening and development; (3) allocation of surrogate heart tissue to myocardial repair applications. This overview will provide the background for cell-based myocardial repair, introduce the main myocardial tissue engineering concepts, discuss the use of embryonic and non-embryonic stem cells, and lays out the potential direct and indirect therapeutic use of human tissue engineered myocardium.
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Zimmermann, WH. Herzgewebe aus embryonalen Stammzellen. Bundesgesundheitsbl. 51, 1021–1025 (2008). https://doi.org/10.1007/s00103-008-0630-6
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DOI: https://doi.org/10.1007/s00103-008-0630-6