Early human fetal lung atlas reveals the temporal dynamics of epithelial cell plasticity

Area of Science:

• Developmental Biology
• Genomics
• Cell Biology

Background:

• Understanding human fetal lung development is crucial for identifying causes of congenital defects and diseases.
• The pseudoglandular stage is a critical period for lung organogenesis.

Purpose of the Study:

• To create a comprehensive single-cell atlas of the developing human lung.
• To characterize progenitor cell populations and their differentiation trajectories.
• To benchmark human pluripotent stem cell-derived lung models.

Main Methods:

• Single-cell RNA sequencing of 19 human fetal lung tissues (10-19 gestational weeks).
• Spatial transcriptomics to analyze cell-cell interactions and spatial organization.
• Analysis of gene expression patterns, including CFTR, to identify cell lineages.

Main Results:

• Detailed mapping of over 150,000 single cells, revealing dynamic developmental trajectories.
• Identification of progenitor cells expressing high levels of CFTR, which give rise to specialized epithelial cells.
• Characterization of temporal regulation of signaling pathways governing cell differentiation and emergence.
• Validation of human pluripotent stem cell-derived lung models exhibiting similar developmental patterns.

Conclusions:

• This study provides an unprecedented single-cell resolution atlas of human fetal lung development.
• It elucidates the complex temporal and spatial dynamics of cell lineage specification.
• The findings offer a valuable resource for studying lung development, disease, and regenerative medicine applications.