New tools to study renal fibrogenesis.

Area of Science:

• Nephrology
• Molecular Biology
• Genomics

Background:

• Kidney fibrosis is a critical pathological feature of chronic kidney disease (CKD).
• Technological advancements in multiomic analyses of human kidney tissue are revolutionizing fibrosis research.
• Understanding the cellular mechanisms underlying kidney fibrosis is essential for developing effective treatments.

Purpose of the Study:

• To review advancements in single-cell and spatial multiomic techniques for studying human kidney fibrosis.
• To highlight new avenues for exploring research questions related to kidney fibrosis development.
• To discuss the application of multiomic approaches to understand cell lineages, plasticity, and communication in fibrosis.

Main Methods:

• Single-cell RNA sequencing (scRNA-seq) was used to analyze cells from healthy and CKD human kidneys.
• Comparative analysis identified cellular sources and states involved in kidney fibrosis.
• Emerging single-cell and spatial multiomic tools are discussed for future research.

Main Results:

• PDGFRα+/PDGFRβ+ mesenchymal cells were identified as the primary source of extracellular matrix (ECM) in kidney fibrosis.
• Common cell states of fibroblasts and myofibroblasts were characterized.
• Insights into molecular regulators of fibrosis were provided.

Conclusions:

• Single-cell and spatial multiomic approaches offer powerful tools to investigate kidney fibrosis.
• These techniques can elucidate cell lineages, plasticity, and cell-cell communication in fibrosis.
• Careful experimental design is crucial for maximizing the potential of multiomic studies in kidney fibrosis research.