Lineage-Specific Mesenchymal Stromal Cells Derived from Human iPSCs Showed Distinct Patterns in Transcriptomic...

Area of Science:

• Stem cell biology
• Regenerative medicine
• Biotechnology

Background:

• Mesenchymal stromal cells (MSCs) are explored for therapeutic uses.
• Human induced pluripotent stem cells (hiPSCs) offer a scalable source for MSC production (iMSCs).
• Current iMSC differentiation lacks lineage specificity, limiting therapeutic potential.

Purpose of the Study:

• To develop a stepwise differentiation method for lineage-specific iMSCs from hiPSCs.
• To comprehensively compare the transcriptomic profiles of iMSCs, primary MSCs (pMSCs), and early developmental cells.
• To investigate the impact of iMSC subtypes and priming on extracellular vesicle (EV) production and cargo.

Main Methods:

• A stepwise differentiation protocol from hiPSCs through neural crest and cytotrophoblast intermediates.
• Transcriptomic analysis (RNA-sequencing) of hiPSCs, intermediate cells, lineage-specific iMSCs, and pMSCs.
• Characterization of EV production, exosomal protein content, and cytokine profiles from different iMSC subtypes.

Main Results:

• The stepwise differentiation yielded lineage-specific iMSCs with distinct gene expression patterns.
• Transcriptomic comparisons revealed differences between MSCs and early cells, and similarities between iMSC subtypes and pMSCs.
• iMSC subtype and priming conditions significantly influenced EV production, protein composition, and cytokine cargo.

Conclusions:

• A novel method for generating lineage-specific iMSCs from hiPSCs was established.
• This approach allows for the generation of iMSCs that resemble specific subtypes of pMSCs.
• The findings highlight the potential for tailoring iMSC-derived EVs for therapeutic applications by controlling subtype and priming.