Decoding the differentiation of mesenchymal stem cells into mesangial cells at the transcriptomic level

Area of Science:

• * Stem cell biology and regenerative medicine.
• * Molecular and cellular biology.
• * Transcriptomics and bioinformatics.

Background:

• * Mesangial cells are crucial for glomerular function, supporting ultrafiltration.
• * Pathological loss of mesangial cells impairs renal function.
• * Mesenchymal stem cells (MSCs) can differentiate into mesangial cells, but their transcriptomic changes are not well understood.

Purpose of the Study:

• * To profile transcriptomic changes during MSC differentiation into mesangial cells.
• * To identify key transcription factors (TFs) and their roles in this process.
• * To elucidate TF-TF and TF-gene regulatory networks during differentiation.

Main Methods:

• * Monotonic Feature Selector for identifying key genes.
• * Time-Ordered Gene Co-expression Network (TO-GCN) analysis for TF network construction.
• * Transcriptomic profiling of MSCs differentiating into mesangial cells.

Main Results:

• * Identified monotonic key genes associated with stemness, cell cycle, and mesangial cell function.
• * TO-GCN analysis classified differentiation into three stages: preparation, initiation, and maturation.
• * Revealed TF-TF and TF-key gene regulatory relationships, including those in muscle contraction.

Conclusions:

• * Established a systematic transcriptomic profile of MSC-to-mesangial cell differentiation.
• * Identified key genes, TFs, and pathways involved in this differentiation.
• * Provided novel insights into the three stages of mesangial cell differentiation and regulatory networks.