Solute carrier (SLC) expression reveals skeletogenic cell diversity

Area of Science:

• Developmental Biology
• Genomics
• Molecular Biology

Background:

• The developing embryo exhibits significant cell type diversity.
• Single-cell RNA sequencing (scRNA-seq) typically groups cells by gene regulatory states.
• Additional cellular diversity exists within and across these states due to differential gene expression governing cell function.

Purpose of the Study:

• To analyze scRNA-seq data from the late gastrula stage of *Strongylocentrotus purpuratus* (purple sea urchin).
• To understand the expression patterns of ABC and SLC transporter families.
• To identify unique transporter patterns and their association with cell types and functions.

Main Methods:

• Analysis of scRNA-seq data from *Strongylocentrotus purpuratus* late gastrula.
• Clustering of cells based on the expression patterns of ABC and SLC transporter genes.
• Exploration of transporter expression patterns in specific mesodermal cell types.

Main Results:

• Identified unique transporter patterns shared across cell lineages and specific to known cell types.
• Revealed enrichment of solute carrier transporters (SLCs) involved in nutrient absorption in pigment and blastocoelar cells.
• Found SLCs potentially related to skeletogenesis enriched in primary mesenchyme cells.

Conclusions:

• Clustering cells by transporter activity is a valuable strategy for discovering previously obscured cellular populations.
• Transporter expression patterns provide insights into cell-specific functions during embryonic development.
• This approach enhances the understanding of cellular diversity beyond traditional gene regulatory state classifications.