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Hepatic Progenitor Specification from Pluripotent Stem Cells using a Defined Differentiation System
Published on: May 10, 2020
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A single-cell transcriptomic analysis reveals precise pathways and regulatory mechanisms underlying hepatoblast
Li Yang1,2, Wei-Hua Wang1,2, Wei-Lin Qiu1,3
1Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, College of Life Sciences, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China.
Hepatology (Baltimore, Md.)
|July 7, 2017
Summary
Hepatoblast differentiation into hepatocytes follows a linear path, while cholangiocyte development takes a distinct route. This study clarifies distinct liver cell development pathways.
Area of Science:
- Developmental Biology
- Cell Biology
- Genomics
Background:
- The differentiation pathways of bipotential hepatoblasts into hepatocytes and cholangiocytes are not fully understood.
- Clarifying these pathways is crucial for liver biology and regenerative medicine.
Purpose of the Study:
- To elucidate the distinct in vivo differentiation pathways of hepatoblasts into hepatocytes and cholangiocytes.
- To define the precise timing and characteristics of hepatocyte and cholangiocyte development.
Main Methods:
- Single-cell and bulk-cell transcriptomic analysis of mouse embryonic liver cells (E10.5-E17.5).
- Cell sorting based on differentiation markers.
- Analysis of cell proliferation and differentiation states.
Main Results:
- Hepatoblast-to-hepatocyte differentiation is a gradual, linear process occurring between embryonic days 13.5 and 15.5.
- Hepatoblast-to-cholangiocyte differentiation follows a non-linear pathway with heterogeneous maturation states.
- Proliferating cells increase during cholangiocyte differentiation, unlike hepatocyte development.
- The protein kinase C/mitogen-activated protein kinase pathway promotes cholangiocyte maturation.
Conclusions:
- Distinct developmental pathways exist for hepatocytes and cholangiocytes.
- Understanding these pathways aids in comprehending liver biology and in vitro stem cell differentiation strategies.
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