Multimodal characterization of murine gastruloid development

Area of Science:

• Developmental Biology
• Stem Cell Biology
• Genomics

Background:

• Gastruloids are 3D stem cell aggregates that model early embryonic development.
• Understanding gastruloid development is key to recapitulating in vivo embryonic patterning.

Purpose of the Study:

• To map cell states and types during gastruloid development using single-cell genomics.
• To compare gastruloid development with in vivo embryonic development.
• To identify genetic interactions governing pattern formation and improve gastruloid models.

Main Methods:

• Single-cell genomic analysis to profile cell states.
• High-throughput imaging pipeline for spatial monitoring of symmetry breaking.
• Compound screening to perturb gastruloid development.
• Dual Wnt modulation for improving anterior structure formation.

Main Results:

• Detailed cell state and type mapping during gastruloid development.
• Identification of early spatial pluripotency variability influencing Wnt response.
• Observation of distinct cell populations (pluripotent core, primitive streak-like periphery) driving symmetry breaking and axis elongation.
• Inference of genetic interaction networks through compound screening.
• Demonstration of improved anterior structure formation via dual Wnt modulation.

Conclusions:

• Gastruloids serve as a valuable in vitro model for studying embryonic pattern formation.
• Early spatial patterning in gastruloids dictates developmental trajectories.
• This work provides a comprehensive resource for gastruloid development and offers strategies for model improvement.