title: Adult human bone marrow- and adipose tissue-derived stromal cells support the formation of prevascular-like structures from endothelial cells in vitro.
abstract: Inadequate vascularization of in vitro-engineered tissue constructs after implantation is a major problem in most tissue-engineering applications. In this study we evaluated whether adipose tissue-derived stromal cells (ASCs), similar to bone marrow-derived stromal cells (BMSCs), can support the organization of endothelial cells into prevascular-like structures using an in vitro model. In addition, we investigated the mechanisms leading to the support of endothelial organization by these cells. We cultured human umbilical vein endothelial cells (HUVECs), ASCs, and BMSCs either alone or in combination in fibrin-embedded spheroids for 14 days. We found that BMSCs and ASCs formed cellular networks that expressed alpha smooth muscle actin and, in the case of ASCs, also CD34. Further, BMSCs and ASCs secreted hepatocyte growth factor and tissue inhibitor of metalloproteinase 1 and 2. In addition, ASC-conditioned medium induced HUVEC outgrowth, whereas BMSC-conditioned medium and hepatocyte growth factor-supplemented medium did not. Finally, both BMSCs and ASCs supported HUVEC organization into prevascular-like structures when cocultured. Our results suggest that both BMSCs and ASCs can support the formation of prevascular-like structures in vitro. Further, our findings indicate that cell-cell contacts and reciprocal signaling play an important role in the formation of these prevascular structures.
authors: Department of Plastic and Reconstructive Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands. f.verseijden@erasmusmc.nl
authors: Femke
authors: F
authors: Verseijden
authors: Sandra J
authors: SJ
authors: Posthumus-van Sluijs
authors: Predrag
authors: P
authors: Pavljasevic
authors: Stefan O P
authors: SO
authors: Hofer
authors: Gerjo J V M
authors: GJ
authors: van Osch
authors: Eric
authors: E
authors: Farrell
mesh_terms: D000273:Adipose Tissue / Q000166:cytology* / Q000378:metabolism; D000328:Adult; D018952:Antigens, CD34 / Q000378:metabolism; D001808:Blood Vessels / Q000166:cytology* / Q000378:metabolism; D001854:Bone Marrow Cells / Q000166:cytology* / Q000378:metabolism; D002450:Cell Communication; D002478:Cells, Cultured; D018920:Coculture Techniques; D042783:Endothelial Cells / Q000166:cytology* / Q000378:metabolism; D005260:Female; D005337:Fibrin / Q000378:metabolism; D017228:Hepatocyte Growth Factor / Q000378:metabolism; D006801:Humans; D008297:Male; D020781:Matrix Metalloproteinase 1 / Q000378:metabolism; D020778:Matrix Metalloproteinase 2 / Q000378:metabolism; D008875:Middle Aged; D015398:Signal Transduction; D018874:Spheroids, Cellular / Q000166:cytology / Q000378:metabolism; D017154:Stromal Cells / Q000166:cytology / Q000378:metabolism; D023822:Tissue Engineering / Q000379:methods
chemical_list: D018952:Antigens, CD34; D017228:Hepatocyte Growth Factor; D005337:Fibrin; C522361:MMP2 protein, human; D020778:Matrix Metalloproteinase 2; C522360:MMP1 protein, human; D020781:Matrix Metalloproteinase 1