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3D reconstruction of a gastrulating human embryo
Zhenyu Xiao1, Lina Cui2, Yang Yuan3
1Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; School of Life Science, Beijing Institute of Technology, Beijing 100081, China; Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China; Beijing Institute for Stem Cell and Regenerative Medicine, Beijing 100101, China.
This study maps early human development using spatial transcriptomics on a Carnegie stage 8 embryo. It reveals cell subtypes and tissue patterning during gastrulation, advancing our understanding of embryonic development.
Area of Science:
- Developmental Biology
- Genomics
- Human Embryology
Background:
- Understanding early human development, especially gastrulation, is limited by a lack of spatial data from natural embryos.
- Spatial transcriptomics offers a powerful tool to investigate embryonic development with high resolution.
Purpose of the Study:
- To create a high-resolution 3D spatial map of a Carnegie stage 8 human embryo.
- To identify cell subtypes, lineage trajectories, and signaling centers during human gastrulation.
Main Methods:
- High-resolution spatial transcriptomics profiling of 38,562 spots from 62 transverse sections of a Carnegie stage 8 human embryo.
- Construction of a 3D embryo model integrating gene expression and positional data.
- Analysis of cell subtypes, lineage trajectories, regulons, and signaling activities.
Main Results:
- Identification of diverse cell subtypes within the 3D embryo model based on gene expression and spatial location.
- Characterization of embryonic and extra-embryonic lineage trajectories and associated gene regulatory networks (regulons).
- Mapping of signaling centers and activities crucial for gastrulation and tissue patterning.
Conclusions:
- This study provides unprecedented spatial insights into human gastrulation and early post-gastrulation development.
- The generated 3D spatial transcriptomic atlas serves as a valuable reference for human embryogenesis research.
- Findings illuminate the molecular mechanisms driving lineage progression and tissue organization in the developing human embryo.
