Human kidney clonal proliferation disclose lineage-restricted precursor characteristics

Area of Science:

• Nephrology
• Regenerative Medicine
• Cell Biology

Background:

• In-vivo studies show mouse kidney regeneration involves lineage-restricted clonal proliferation.
• Understanding human renal cell behavior ex-vivo is key for regenerative therapies.

Purpose of the Study:

• To analyze ex-vivo clonal growth and characteristics of single human renal epithelial cells.
• To compare clonal cultures for lineage restriction and molecular features.

Main Methods:

• Limiting dilution was used to generate clonal cultures from single human renal epithelial cells.
• Transcriptomics and molecular analyses were performed on the clonal cultures.

Main Results:

• Clonal cultures exhibited restriction to proximal or distal kidney sub-lineages.
• Distinct molecular profiles were observed, including cell-cycle, epithelial-mesenchymal transition, and signaling pathways.
• Early clones showed quiescence and altered renal identity markers compared to bulk cultures.

Conclusions:

• Ex-vivo clonal growth of human renal cells recapitulates in-vivo lineage restriction.
• Multiple heterogeneous precursors are necessary for reconstructing diverse renal lineages in organoid technology and for kidney regeneration.