Abstract
The potential functions of hepatocyte-like cells (HLCs) derived from human embryonic stem cells (hESCs) hold great promise for disease modeling and drug screening applications. Provided here is an efficient and reproducible method for differentiation of hESCs into functional HLCs. The establishment of an endoderm lineage is a key step in the differentiation to HLCs. By our method, we regulate the key signaling pathways by continuously supplementing Activin A and CHIR99021 during hESC differentiation into definitive endoderm (DE), followed by generation of hepatic progenitor cells, and finally HLCs with typical hepatocyte morphology in a stagewise method with completely defined reagents. The hESC-derived HLCs produced by this method express stage-specific markers (including albumin, HNF4α nuclear receptor, and sodium taurocholate cotransporting polypeptide (NTCP)), and show special characteristics related to mature and functional hepatocytes (including indocyanine green staining, glycogen storage, hematoxylin-eosin staining and CYP3 activity), and can provide a platform for the development of HLC-based applications in the study of liver diseases.
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