TMT-Based Quantitative Proteomics Analysis Reveals Differentially Expressed Proteins between Different Sources of...

Area of Science:

• Regenerative Medicine
• Tissue Engineering
• Proteomics

Background:

• Mesenchymal stem cells (MSCs) are vital for tissue engineering and regenerative medicine due to their regenerative and trophic properties.
• Bone marrow MSCs are widely used, but MSCs from different sources may possess varying secretion potentials influencing therapeutic outcomes.
• Understanding these source-specific differences is critical for optimizing MSC-based therapies.

Purpose of the Study:

• To quantitatively compare the proteomic profiles of MSCs from Wharton's jelly (WJ), dental pulp (DP), and bone marrow (BM).
• To identify source-specific protein expression related to biological properties relevant for tissue engineering applications.
• To determine if MSC origin influences therapeutic potential and guide selection for specific objectives.

Main Methods:

• Quantitative proteomic analysis using the TMT technique.
• Comparison of protein expression in MSCs derived from WJ, DP, and BM.
• Identification and analysis of differentially expressed proteins.

Main Results:

• A total of 611 differentially expressed human proteins were identified across the three MSC sources.
• WJ-MSCs showed significant variation, with higher expression of extracellular matrix (ECM) proteins and those involved in inflammatory/immune responses.
• BM-MSCs exhibited greater expression of proteins related to differentiation (osteogenic, adipogenic, neuronal, muscular) and paracrine signaling, while DP-MSCs overexpressed proteins involved in exocytosis.

Conclusions:

• Significant proteomic differences exist between WJ, DP, and BM-MSCs.
• These distinct protein profiles suggest unique functional capabilities for each MSC source.
• The choice of MSC origin should be tailored to the specific therapeutic goals in tissue engineering and regenerative medicine.