Dynamics of lineage commitment revealed by single-cell transcriptomics of differentiating embryonic stem cells

Area of Science:

• Developmental Biology
• Stem Cell Biology
• Transcriptomics

Background:

• Gene expression heterogeneity in pluripotent mouse embryonic stem cells (mESCs) is well-studied.
• Systematic single-cell analysis of mESC exit from pluripotency and lineage commitment is lacking.

Purpose of the Study:

• To investigate gene expression dynamics during retinoic acid-induced mESC differentiation.
• To characterize the single-cell transcriptomic landscape during the transition from pluripotency to lineage commitment.

Main Methods:

• Unbiased single-cell transcriptomics was employed.
• Retinoic acid was used to drive mESC differentiation.
• Gene expression dynamics were measured during differentiation.

Main Results:

• Exit from pluripotency initiates a lineage transition and a transient phase of heightened susceptibility to lineage signals.
• Increased gene expression variability and sequential expression of transcriptional regulators characterize this phase.
• A comprehensive single-cell analysis of pluripotency exit and lineage commitment was achieved.

Conclusions:

• The study provides novel insights into the molecular mechanisms governing early lineage commitment.
• Understanding this transient phase may enable improved lineage manipulation strategies by optimizing differentiation cue timing.