Thymosin beta-4 directs cell fate determination of human mesenchymal stem cells through biophysical effects.

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)

Change of actin filament organization at the early stage of cell differentiation directs cell fate commitment of mesenchymal stem cells (MSCs). Thymosin beta-4 (Tbeta(4)), a major G-actin sequestering peptide, is known to regulate the cytoskeleton. The study investigated the ways in which Tbeta(4) regulates cell fate determination in MSCs upon differentiation induction. It was found that Tbeta(4) decreased F-actin formation, reduced the F-actin/G-actin ratio, and inhibited osteogenic differentiation; such actin reorganization was not associated with the change of Runt-related transcription factor 2 gene expression during early osteogenic induction. Besides, Tbeta(4) reciprocally facilitated adipogenic differentiation. Tbeta(4) treatment was found to up-regulate gene as well as promote surface expression of adipocyte adhesion molecule during early adipogenic differentiation, which accompanied acceleration of adipocyte phenotypic maturation but was not associated with differential expression of peroxisome proliferator-activated receptor gamma during the first week of adipogenic induction. In summary, Tbeta(4) initiated cell fate determination of MSCs through biophysical effects exerted by cytoskeleton reorganization and altered cell-cell adhesion rather than direct regulation of lineage-determining transcriptional factors. Such findings suggest that Tbeta(4), a ubiquitous peptide

Evidence level

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

Browse all related research

Filter the research library by this study's title keywords, author, or publication year.