Multimodal Spatial Transcriptomics Reveals the Developing Human Liver Niche at Single-Cell Resolution

Area of Science:

• Developmental Biology
• Hepatology
• Stem Cell Biology

Background:

• The liver niche is a unique, multifunctional environment during development.
• It serves as a primary site for hematopoiesis before the third trimester growth spurt.
• This niche supports endodermal and mesenchymal cells coordinating liver and blood development.

Purpose of the Study:

• To identify and validate RNA-based markers in the human developmental liver niche.
• To understand the spatial organization of cell populations during this critical window.
• To characterize the molecular interactions supporting hematopoiesis and hepatocyte function.

Main Methods:

• Spatial transcriptomics and histologic approaches were used on human developmental liver samples.
• Single-cell resolution molecular imaging and transcriptomic analysis were performed.
• Multiplexed RNA fluorescent single-molecule in situ hybridization validated findings.

Main Results:

• Identified epithelial, hematopoietic, endothelial, and stromal cell populations in shared microenvironments.
• Confirmed gene expression patterns of the developing ductal plate.
• Localized CXC motif chemokine ligands to the hepatic hematopoietic stem cell niche.

Conclusions:

• Spatial transcriptomics enhances characterization of biliary development and disease.
• Understanding the developmental liver niche is vital for in vitro regenerative engineering.
• This study provides a molecular and spatial map of the developmental liver niche.