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Area of Science:

  • Developmental Biology
  • Biotechnology
  • Genomics

Background:

  • Human gastruloids are valuable models for studying early embryogenesis.
  • Current limitations exist in automated, high-throughput screening and sorting of gastruloids for large-scale assays.

Purpose of the Study:

  • To develop a novel microraft array-based technology for automated image-based assays and sorting of human gastruloids.
  • To enable downstream analyses like gene expression profiling on individual gastruloids.

Main Methods:

  • Fabrication of indexed magnetic microraft arrays with extracellular matrix for gastruloid formation.
  • Development of an image analysis pipeline for feature extraction from gastruloid images.
  • Implementation of an automated sorting system for releasing and collecting microrafts with gastruloids.

Main Results:

  • High accuracy in gastruloid formation on microrafts and efficient automated sorting (98-99%).
  • Identification of phenotypic differences between euploid and aneuploid gastruloids, including DNA content and gene expression.
  • Upregulation of noggin (NOG) and keratin 7 (KRT7) in aneuploid gastruloids, negatively correlated with DNA/area.

Conclusions:

  • The microraft array platform facilitates high-throughput screening and sorting of individual human gastruloids.
  • This technology provides insights into the phenotypic heterogeneity and molecular mechanisms underlying gastruloid development, particularly in aneuploidy.
  • The platform is poised to advance our understanding of early human embryogenesis and related developmental disorders.