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A synthetic substrate to support early mesodermal differentiation of human embryonic stem cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
7995 573 2011 9 PDF Available
Title
A synthetic substrate to support early mesodermal differentiation of human embryonic stem cells
Abstract

Our ability to guide differentiation of human pluripotent stem cells (hPSCs) toward desired lineages efficiently and reproducibly in xeno-free conditions is the key to advancing hPSC technology from the laboratory to clinical use. Here we report an engineered biomimetic substrate functionalized with both peptide ligands for α5β1 and α6β1 integrins to support efficient early mesodermal differentiation of human embryonic stem cells (hESCs) when cultured in a differentiation medium containing BMP4. In contrast, mesodermal differentiation is not induced on substrates functionalized with either ligand alone even though the culture medium is identical. Mesodermal differentiation was characterized by immunofluorescent staining, flow cytometric analysis, and RT-PCR analysis of early mesodermal markers Brachyury, Mixl1, and Wnt3. The early mesodermal progenitors derived on the substrate functionalized with both integrin ligands have the normal developmental potential to further differentiate along the hemato-endothelial and cardiac lineages. Immobilized ligands for α5β1 and α6β1 integrins both are permissive, necessary, and sufficient insoluble ligands in this engineered system to support early mesodermal differentiation of hESCs. This synthetic substrate, in conjunction with defined soluble factors, constructs a well-controlled and xeno-free early mesodermal differentiation niche that offers advantages over the previously reported niche constructed with the Matrigel-coated substrate.

Keywords
Stem cell; Biomimetic material; Surface modification; Peptide; Integrin
First Page Preview
A synthetic substrate to support early mesodermal differentiation of human embryonic stem cells
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 32, Issue 32, November 2011, Pages 8058–8066
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering