Senescing human bone-marrow-derived clonal mesenchymal stem cells have altered lysophospholipid composition and...

Area of Science:

• Stem cell biology
• Metabolomics
• Biochemistry

Background:

• Mesenchymal stem cells (MSCs) are valuable in research and clinical settings due to low ethical concerns and carcinogenicity.
• Limited yield from bone marrow necessitates ex vivo amplification, potentially altering MSC properties.
• Understanding metabolic shifts during ex vivo culture is crucial for controlling MSC activity and differentiation potential.

Purpose of the Study:

• To investigate metabolic changes in human bone-marrow-derived clonal MSCs (hcMSCs) during cellular senescence.
• To identify specific endogenous metabolites affected by ex vivo culture and senescence.
• To provide metabolic insights for managing MSCs during amplification.

Main Methods:

• Profiling of endogenous metabolites in hcMSCs using ultra-high-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (UPLC/QTOFMS).
• Statistical analysis using a linear mixed effects model to identify significant metabolite changes.
• Structural analysis and spectrum pattern comparison for metabolite identification.

Main Results:

• Eight key metabolites, including lysophosphatidylcholine (LPC) and lysophosphatidylethanolamine (LPE) species (e.g., LPC 16:0, LPE 22:4), showed altered expression during senescence.
• Metabolic profiling revealed distinct changes associated with cellular senescence in cultured MSCs.
• The study identified specific metabolic markers indicative of senescence progression.

Conclusions:

• Cellular senescence in ex vivo cultured MSCs is associated with significant alterations in specific lysophospholipid metabolites.
• Metabolic profiling provides a valuable approach to monitor and potentially control MSC behavior during culture.
• These findings contribute to optimizing the use of MSCs in therapeutic and research applications.