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In Vitro Differentiation of Human Pluripotent Stem Cells into Trophoblastic Cells
Published on: March 16, 2017
Model systems for studying trophoblast differentiation from human pluripotent stem cells
Toshihiko Ezashi1, Bhanu Prakash V L Telugu, R Michael Roberts
1Division of Animal Sciences & Bond Life Sciences Center, University of Missouri-Columbia, 65211, USA.
Cell and Tissue Research
|March 20, 2012
Summary
Bone morphogenetic protein 4 (BMP4) effectively directs human pluripotent stem cells toward trophoblast (TB) lineage. Excluding FGF2 is crucial for efficient TB generation, establishing TB as a default developmental pathway.
Area of Science:
- Developmental Biology
- Stem Cell Biology
- Cell Lineage Specification
Background:
- Human embryonic stem cells (ESC) and induced pluripotent stem cells (iPSC) offer models for early human development.
- Trophoblast (TB) lineage is critical for placental formation and embryonic development.
- BMP4 is a key growth factor implicated in extraembryonic lineage specification.
Purpose of the Study:
- To review the established model of generating trophoblast (TB) cells from human ESC and iPSC using BMP4.
- To elucidate the roles of BMP4 and FGF2 in directing TB lineage formation.
- To discuss strategies for optimizing BMP4-driven TB differentiation.
Main Methods:
- Treatment of human ESC and iPSC with BMP4.
- Manipulation of growth factor composition in culture media (exclusion of FGF2).
- Analysis of transcription factor expression and cell type markers.
- Assessment of differentiation under varying oxygen conditions.
Main Results:
- BMP4 exposure upregulates key transcription factors for TB emergence within hours.
- High O(2) atmosphere and time promote the appearance of differentiated TB subtypes (extravillous and syncytioTB).
- Exclusion of FGF2 minimizes mesoderm and endoderm co-induction, favoring TB differentiation.
Conclusions:
- BMP4 treatment drives human epiblast-type ESC and iPSC unidirectionally towards the TB lineage.
- BMP4-induced TB generation represents a default developmental pathway when pluripotency networks destabilize.
- Inhibiting activin A and FGF2 signaling can further support BMP4-directed TB differentiation.
