Deciphering the dynamic single-cell transcriptional landscape in the ocular surface ectoderm differentiation system

Area of Science:

• Developmental Biology
• Stem Cell Biology
• Ocular Surface Science

Background:

• The ocular surface ectoderm (OSE) is vital for eye development, but its differentiation mechanisms remain unclear.
• Understanding OSE development is crucial for addressing ocular surface disorders.

Purpose of the Study:

• To elucidate the molecular mechanisms and cellular trajectories during in vitro differentiation of embryonic stem cells (ESCs) into the OSE lineage.
• To construct a molecular atlas of ectodermal lineage development from ESCs.

Main Methods:

• Single-cell transcriptomic analysis of in vitro differentiated ESCs.
• Identification of cell subpopulations and developmental trajectories.
• Analysis of gene expression, transcription factor activity, and signaling pathways.

Main Results:

• Identified nine distinct cell subpopulations differentiating along neural crest, neuroectodermal, and surface ectodermal lineages.
• Discovered a PAX6+TP63+ cell population as OSE precursors.
• Validated the in vitro model against in vivo mouse epiblast development.

Conclusions:

• This study provides a comprehensive molecular atlas of OSE development from ESCs.
• Reveals insights into cellular heterogeneity and regulatory networks governing OSE differentiation.
• Aids in understanding ocular surface biology and developing cell-based therapies for ocular disorders.