Proteomic Study Revealed a Distinction Between Human Dermal Fibroblasts and Mesenchymal Stem Cells from Different Sources.

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Mesenchymal stem cells (MSCs) are an essential tool in cell-based therapies. One of the most crucial factors for efficacy in regenerative medicine is the source of MSCs. Tissue origin has long been suggested as a potential determinant of MSC properties. Human dermal fibroblasts (HDFa) share similar characteristics with MSCs, and the question of whether HDFa are functionally equivalent to MSCs remains debated. The present work used proteomic and phenotypic analyses to compare HDFa, dental pulp stem cells (DPSCs), and adipose-derived mesenchymal stem cells (AD-MSCs). We observed similarities and/or differences in morphology, cell surface markers, differentiation, and proteomic profile. Proteome was profiled by nano liquid chromatography and comprehensively quantified by mass spectrometry. In fact, HDFa and MSCs shared similar surface markers, growth kinetics, and differentiation capacity. Proteomic analysis reproducibly identified and quantified 3,051 proteins, 86 of them were differentially abundant according to strict statistical criteria. We identified a set of proteins that determined signatures for each stem cell origin. Gene Ontology (GO) term enrichment of differentially accumulated proteins, and Gene Set Enrichment Analysis (GSEA) identified signaling pathways characteristic to individual cell types. Particularly, we highlighted signaling pathways involved in cell migrati

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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