title: Influence of substrate composition on human embryonic stem cell differentiation and extracellular matrix production in embryoid bodies.
abstract: Stem cells reside in specialized niches in vivo. Specific factors, including the extracellular matrix (ECM), in these niches are directly responsible for maintaining the stem cell population. During development, components of the stem cell microenvironment also control differentiation with precise spatial and temporal organization. The stem cell microenvironment is dynamically regulated by the cellular component, including stem cells themselves. Thus, a mechanism exists whereby stem cells modify the ECM, which in turn affects the fate of the stem cell. In this study, we investigated whether the type of ECM initially adsorbed to the culture substrate can influence the composition of the ECM deposited by human embryonic stem cells (hESCs) differentiating in embryoid bodies, and whether different ECM composition and deposition profiles elicit distinct differentiation fates. We have shown that the initial ECM environment hESCs are exposed to affects the fate decisions of those cells and that this initial ECM environment is constantly modified during the differentiation process.
authors.affiliation: Dept. of Biomedical Engineering, University of Wisconsin, Madison, Wisconsin, 53706.
authors.forename: Alex
authors.initials: A
authors.lastname: Laperle
authors.forename: Kristyn S
authors.initials: KS
authors.lastname: Masters
authors.forename: Sean P
authors.initials: SP
authors.lastname: Palecek
mesh_terms: D018929:Cell Culture Techniques; D002454:Cell Differentiation / Q000187:drug effects*; D002460:Cell Line; D003470:Culture Media; D058732:Embryoid Bodies / Q000166:cytology / Q000378:metabolism*; D053595:Embryonic Stem Cells / Q000166:cytology* / Q000378:metabolism; D016326:Extracellular Matrix Proteins / Q000032:analysis / Q000378:metabolism* / Q000494:pharmacology*; D006801:Humans
chemical_list: D003470:Culture Media; D016326:Extracellular Matrix Proteins
keywords: differentiation; extracellular matrix; human pluripotent stem cell