Lipidomics Reveals Cell Specific Changes During Pluripotent Differentiation to Neural and Mesodermal Lineages

Area of Science:

• Stem cell biology
• Lipidomics
• Cellular differentiation

Background:

• Pluripotent stem cells (PSCs) are crucial for understanding human disease and developing therapies.
• Lipids play vital roles in cell function and are implicated in various diseases.
• Understanding lipid dynamics during PSC differentiation is essential but remains incomplete.

Purpose of the Study:

• To investigate lipid alterations in induced pluripotent stem cells (iPSCs) during differentiation into neural and mesodermal lineages.
• To identify conserved and unique lipid changes across distinct differentiation pathways.
• To enhance the fundamental understanding of lipid metabolism in PSCs.

Main Methods:

• Lipidomic analysis of iPSCs at critical differentiation stages.
• Utilized a platform combining liquid chromatography, ion mobility spectrometry, and mass spectrometry (LC-IMS-MS).
• Compared lipid profiles during differentiation toward neural and mesodermal fates.

Main Results:

• Identified a common accumulation of triacylglycerides and free fatty acids in early iPSCs.
• Observed distinct utilization patterns of these lipids during subsequent differentiation.
• Detected unique fluctuations in specific phospholipid classes, sphingomyelins, and ceramides across differentiation.

Conclusions:

• Lipid metabolism undergoes significant, stage-specific changes during iPSC differentiation.
• Shared early lipid accumulation is followed by divergent lipid profiles depending on cell fate.
• These findings advance knowledge of PSC lipidomics and support applications in regenerative medicine and disease modeling.