title: In vitro biological and mechanical evaluation of various scaffold materials for myocardial tissue engineering.
abstract: A cardiac patch is a construct devised in regenerative medicine to replace necrotic heart tissue after myocardial infarctions. The cardiac patch consists of a scaffold seeded with stem cells. To identify the best scaffold for cardiac patch construction we compared polyurethane, Collagen Cell Carriers, ePTFE, and ePTFE SSP1-RGD regarding their receptiveness to seeding with mesenchymal stem cells isolated from umbilical cord tissue. Seeding was tested at an array of cell seeding densities. The bioartificial patches were cultured for up to 35 days and evaluated by scanning electron microscopy, microscopy of histological stains, fluorescence microscopy, and mitochondrial assays. Polyurethane was the only biomaterial which resulted in an organized multilayer (seeding density: 0.750 × 10(6) cells/cm(2)). Cultured over 35 days at this seeding density the mitochondrial activity of the cells on polyurethane patches continually increased. There was no decrease in the E Modulus of polyurethane once seeded with cells. Seeding of CCC could only be realized at a low seeding density and both ePTFE and ePTFE SSP1-RGD were found to be unreceptive to seeding. Of the tested scaffolds polyurethane thus crystallized as the most appropriate for seeding with mesenchymal stem cells in the framework of myocardial tissue engineering.
authors: Department of Cardiac Surgery, Laboratory for Tissue Engineering, Grosshadern Medical Centre, Ludwig Maximilian University, Marchioninistr. 15, 81377, Munich, Germany.
authors: Florian E M
authors: FE
authors: Herrmann
authors: Anja
authors: A
authors: Lehner
authors: Trixi
authors: T
authors: Hollweck
authors: Ulrike
authors: U
authors: Haas
authors: Cornelia
authors: C
authors: Fano
authors: David
authors: D
authors: Fehrenbach
authors: Rainer
authors: R
authors: Kozlik-Feldmann
authors: Erich
authors: E
authors: Wintermantel
authors: Gunther
authors: G
authors: Eissner
authors: Christian
authors: C
authors: Hagl
authors: Bassil
authors: B
authors: Akra
mesh_terms: D001696:Biomechanical Phenomena / Q000187:drug effects; D003094:Collagen / Q000494:pharmacology; D055119:Elastic Modulus / Q000187:drug effects; D006801:Humans; D008422:Materials Testing; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D008855:Microscopy, Electron, Scanning; D008928:Mitochondria / Q000187:drug effects / Q000378:metabolism; D009206:Myocardium / Q000378:metabolism*; D011138:Polytetrafluoroethylene / Q000494:pharmacology; D011140:Polyurethanes / Q000494:pharmacology; D011419:Propidium / Q000378:metabolism; D013194:Staining and Labeling; D023822:Tissue Engineering / Q000379:methods*; D054457:Tissue Scaffolds / Q000737:chemistry*
chemical_list: D011140:Polyurethanes; D011419:Propidium; D011138:Polytetrafluoroethylene; D003094:Collagen
keywords: biomaterials; cell transplantation; heart disease; stem cells; tissue engineering